1 /* Perform type resolution on the various structures.
2 Copyright (C) 2001-2017 Free Software Foundation, Inc.
3 Contributed by Andy Vaught
5 This file is part of GCC.
7 GCC is free software; you can redistribute it and/or modify it under
8 the terms of the GNU General Public License as published by the Free
9 Software Foundation; either version 3, or (at your option) any later
12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
17 You should have received a copy of the GNU General Public License
18 along with GCC; see the file COPYING3. If not see
19 <http://www.gnu.org/licenses/>. */
23 #include "coretypes.h"
27 #include "arith.h" /* For gfc_compare_expr(). */
28 #include "dependency.h"
30 #include "target-memory.h" /* for gfc_simplify_transfer */
31 #include "constructor.h"
33 /* Types used in equivalence statements. */
37 SEQ_NONDEFAULT
, SEQ_NUMERIC
, SEQ_CHARACTER
, SEQ_MIXED
40 /* Stack to keep track of the nesting of blocks as we move through the
41 code. See resolve_branch() and gfc_resolve_code(). */
43 typedef struct code_stack
45 struct gfc_code
*head
, *current
;
46 struct code_stack
*prev
;
48 /* This bitmap keeps track of the targets valid for a branch from
49 inside this block except for END {IF|SELECT}s of enclosing
51 bitmap reachable_labels
;
55 static code_stack
*cs_base
= NULL
;
58 /* Nonzero if we're inside a FORALL or DO CONCURRENT block. */
60 static int forall_flag
;
61 int gfc_do_concurrent_flag
;
63 /* True when we are resolving an expression that is an actual argument to
65 static bool actual_arg
= false;
66 /* True when we are resolving an expression that is the first actual argument
68 static bool first_actual_arg
= false;
71 /* Nonzero if we're inside a OpenMP WORKSHARE or PARALLEL WORKSHARE block. */
73 static int omp_workshare_flag
;
75 /* True if we are processing a formal arglist. The corresponding function
76 resets the flag each time that it is read. */
77 static bool formal_arg_flag
= false;
79 /* True if we are resolving a specification expression. */
80 static bool specification_expr
= false;
82 /* The id of the last entry seen. */
83 static int current_entry_id
;
85 /* We use bitmaps to determine if a branch target is valid. */
86 static bitmap_obstack labels_obstack
;
88 /* True when simplifying a EXPR_VARIABLE argument to an inquiry function. */
89 static bool inquiry_argument
= false;
93 gfc_is_formal_arg (void)
95 return formal_arg_flag
;
98 /* Is the symbol host associated? */
100 is_sym_host_assoc (gfc_symbol
*sym
, gfc_namespace
*ns
)
102 for (ns
= ns
->parent
; ns
; ns
= ns
->parent
)
111 /* Ensure a typespec used is valid; for instance, TYPE(t) is invalid if t is
112 an ABSTRACT derived-type. If where is not NULL, an error message with that
113 locus is printed, optionally using name. */
116 resolve_typespec_used (gfc_typespec
* ts
, locus
* where
, const char* name
)
118 if (ts
->type
== BT_DERIVED
&& ts
->u
.derived
->attr
.abstract
)
123 gfc_error ("%qs at %L is of the ABSTRACT type %qs",
124 name
, where
, ts
->u
.derived
->name
);
126 gfc_error ("ABSTRACT type %qs used at %L",
127 ts
->u
.derived
->name
, where
);
138 check_proc_interface (gfc_symbol
*ifc
, locus
*where
)
140 /* Several checks for F08:C1216. */
141 if (ifc
->attr
.procedure
)
143 gfc_error ("Interface %qs at %L is declared "
144 "in a later PROCEDURE statement", ifc
->name
, where
);
149 /* For generic interfaces, check if there is
150 a specific procedure with the same name. */
151 gfc_interface
*gen
= ifc
->generic
;
152 while (gen
&& strcmp (gen
->sym
->name
, ifc
->name
) != 0)
156 gfc_error ("Interface %qs at %L may not be generic",
161 if (ifc
->attr
.proc
== PROC_ST_FUNCTION
)
163 gfc_error ("Interface %qs at %L may not be a statement function",
167 if (gfc_is_intrinsic (ifc
, 0, ifc
->declared_at
)
168 || gfc_is_intrinsic (ifc
, 1, ifc
->declared_at
))
169 ifc
->attr
.intrinsic
= 1;
170 if (ifc
->attr
.intrinsic
&& !gfc_intrinsic_actual_ok (ifc
->name
, 0))
172 gfc_error ("Intrinsic procedure %qs not allowed in "
173 "PROCEDURE statement at %L", ifc
->name
, where
);
176 if (!ifc
->attr
.if_source
&& !ifc
->attr
.intrinsic
&& ifc
->name
[0] != '\0')
178 gfc_error ("Interface %qs at %L must be explicit", ifc
->name
, where
);
185 static void resolve_symbol (gfc_symbol
*sym
);
188 /* Resolve the interface for a PROCEDURE declaration or procedure pointer. */
191 resolve_procedure_interface (gfc_symbol
*sym
)
193 gfc_symbol
*ifc
= sym
->ts
.interface
;
200 gfc_error ("PROCEDURE %qs at %L may not be used as its own interface",
201 sym
->name
, &sym
->declared_at
);
204 if (!check_proc_interface (ifc
, &sym
->declared_at
))
207 if (ifc
->attr
.if_source
|| ifc
->attr
.intrinsic
)
209 /* Resolve interface and copy attributes. */
210 resolve_symbol (ifc
);
211 if (ifc
->attr
.intrinsic
)
212 gfc_resolve_intrinsic (ifc
, &ifc
->declared_at
);
216 sym
->ts
= ifc
->result
->ts
;
217 sym
->attr
.allocatable
= ifc
->result
->attr
.allocatable
;
218 sym
->attr
.pointer
= ifc
->result
->attr
.pointer
;
219 sym
->attr
.dimension
= ifc
->result
->attr
.dimension
;
220 sym
->attr
.class_ok
= ifc
->result
->attr
.class_ok
;
221 sym
->as
= gfc_copy_array_spec (ifc
->result
->as
);
227 sym
->attr
.allocatable
= ifc
->attr
.allocatable
;
228 sym
->attr
.pointer
= ifc
->attr
.pointer
;
229 sym
->attr
.dimension
= ifc
->attr
.dimension
;
230 sym
->attr
.class_ok
= ifc
->attr
.class_ok
;
231 sym
->as
= gfc_copy_array_spec (ifc
->as
);
233 sym
->ts
.interface
= ifc
;
234 sym
->attr
.function
= ifc
->attr
.function
;
235 sym
->attr
.subroutine
= ifc
->attr
.subroutine
;
237 sym
->attr
.pure
= ifc
->attr
.pure
;
238 sym
->attr
.elemental
= ifc
->attr
.elemental
;
239 sym
->attr
.contiguous
= ifc
->attr
.contiguous
;
240 sym
->attr
.recursive
= ifc
->attr
.recursive
;
241 sym
->attr
.always_explicit
= ifc
->attr
.always_explicit
;
242 sym
->attr
.ext_attr
|= ifc
->attr
.ext_attr
;
243 sym
->attr
.is_bind_c
= ifc
->attr
.is_bind_c
;
244 /* Copy char length. */
245 if (ifc
->ts
.type
== BT_CHARACTER
&& ifc
->ts
.u
.cl
)
247 sym
->ts
.u
.cl
= gfc_new_charlen (sym
->ns
, ifc
->ts
.u
.cl
);
248 if (sym
->ts
.u
.cl
->length
&& !sym
->ts
.u
.cl
->resolved
249 && !gfc_resolve_expr (sym
->ts
.u
.cl
->length
))
258 /* Resolve types of formal argument lists. These have to be done early so that
259 the formal argument lists of module procedures can be copied to the
260 containing module before the individual procedures are resolved
261 individually. We also resolve argument lists of procedures in interface
262 blocks because they are self-contained scoping units.
264 Since a dummy argument cannot be a non-dummy procedure, the only
265 resort left for untyped names are the IMPLICIT types. */
268 resolve_formal_arglist (gfc_symbol
*proc
)
270 gfc_formal_arglist
*f
;
272 bool saved_specification_expr
;
275 if (proc
->result
!= NULL
)
280 if (gfc_elemental (proc
)
281 || sym
->attr
.pointer
|| sym
->attr
.allocatable
282 || (sym
->as
&& sym
->as
->rank
!= 0))
284 proc
->attr
.always_explicit
= 1;
285 sym
->attr
.always_explicit
= 1;
288 formal_arg_flag
= true;
290 for (f
= proc
->formal
; f
; f
= f
->next
)
298 /* Alternate return placeholder. */
299 if (gfc_elemental (proc
))
300 gfc_error ("Alternate return specifier in elemental subroutine "
301 "%qs at %L is not allowed", proc
->name
,
303 if (proc
->attr
.function
)
304 gfc_error ("Alternate return specifier in function "
305 "%qs at %L is not allowed", proc
->name
,
309 else if (sym
->attr
.procedure
&& sym
->attr
.if_source
!= IFSRC_DECL
310 && !resolve_procedure_interface (sym
))
313 if (strcmp (proc
->name
, sym
->name
) == 0)
315 gfc_error ("Self-referential argument "
316 "%qs at %L is not allowed", sym
->name
,
321 if (sym
->attr
.if_source
!= IFSRC_UNKNOWN
)
322 resolve_formal_arglist (sym
);
324 if (sym
->attr
.subroutine
|| sym
->attr
.external
)
326 if (sym
->attr
.flavor
== FL_UNKNOWN
)
327 gfc_add_flavor (&sym
->attr
, FL_PROCEDURE
, sym
->name
, &sym
->declared_at
);
331 if (sym
->ts
.type
== BT_UNKNOWN
&& !proc
->attr
.intrinsic
332 && (!sym
->attr
.function
|| sym
->result
== sym
))
333 gfc_set_default_type (sym
, 1, sym
->ns
);
336 as
= sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
337 ? CLASS_DATA (sym
)->as
: sym
->as
;
339 saved_specification_expr
= specification_expr
;
340 specification_expr
= true;
341 gfc_resolve_array_spec (as
, 0);
342 specification_expr
= saved_specification_expr
;
344 /* We can't tell if an array with dimension (:) is assumed or deferred
345 shape until we know if it has the pointer or allocatable attributes.
347 if (as
&& as
->rank
> 0 && as
->type
== AS_DEFERRED
348 && ((sym
->ts
.type
!= BT_CLASS
349 && !(sym
->attr
.pointer
|| sym
->attr
.allocatable
))
350 || (sym
->ts
.type
== BT_CLASS
351 && !(CLASS_DATA (sym
)->attr
.class_pointer
352 || CLASS_DATA (sym
)->attr
.allocatable
)))
353 && sym
->attr
.flavor
!= FL_PROCEDURE
)
355 as
->type
= AS_ASSUMED_SHAPE
;
356 for (i
= 0; i
< as
->rank
; i
++)
357 as
->lower
[i
] = gfc_get_int_expr (gfc_default_integer_kind
, NULL
, 1);
360 if ((as
&& as
->rank
> 0 && as
->type
== AS_ASSUMED_SHAPE
)
361 || (as
&& as
->type
== AS_ASSUMED_RANK
)
362 || sym
->attr
.pointer
|| sym
->attr
.allocatable
|| sym
->attr
.target
363 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
364 && (CLASS_DATA (sym
)->attr
.class_pointer
365 || CLASS_DATA (sym
)->attr
.allocatable
366 || CLASS_DATA (sym
)->attr
.target
))
367 || sym
->attr
.optional
)
369 proc
->attr
.always_explicit
= 1;
371 proc
->result
->attr
.always_explicit
= 1;
374 /* If the flavor is unknown at this point, it has to be a variable.
375 A procedure specification would have already set the type. */
377 if (sym
->attr
.flavor
== FL_UNKNOWN
)
378 gfc_add_flavor (&sym
->attr
, FL_VARIABLE
, sym
->name
, &sym
->declared_at
);
382 if (sym
->attr
.flavor
== FL_PROCEDURE
)
387 gfc_error ("Dummy procedure %qs of PURE procedure at %L must "
388 "also be PURE", sym
->name
, &sym
->declared_at
);
392 else if (!sym
->attr
.pointer
)
394 if (proc
->attr
.function
&& sym
->attr
.intent
!= INTENT_IN
)
397 gfc_notify_std (GFC_STD_F2008
, "Argument %qs"
398 " of pure function %qs at %L with VALUE "
399 "attribute but without INTENT(IN)",
400 sym
->name
, proc
->name
, &sym
->declared_at
);
402 gfc_error ("Argument %qs of pure function %qs at %L must "
403 "be INTENT(IN) or VALUE", sym
->name
, proc
->name
,
407 if (proc
->attr
.subroutine
&& sym
->attr
.intent
== INTENT_UNKNOWN
)
410 gfc_notify_std (GFC_STD_F2008
, "Argument %qs"
411 " of pure subroutine %qs at %L with VALUE "
412 "attribute but without INTENT", sym
->name
,
413 proc
->name
, &sym
->declared_at
);
415 gfc_error ("Argument %qs of pure subroutine %qs at %L "
416 "must have its INTENT specified or have the "
417 "VALUE attribute", sym
->name
, proc
->name
,
423 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.intent
== INTENT_OUT
)
425 gfc_error ("INTENT(OUT) argument %qs of pure procedure %qs at %L"
426 " may not be polymorphic", sym
->name
, proc
->name
,
432 if (proc
->attr
.implicit_pure
)
434 if (sym
->attr
.flavor
== FL_PROCEDURE
)
437 proc
->attr
.implicit_pure
= 0;
439 else if (!sym
->attr
.pointer
)
441 if (proc
->attr
.function
&& sym
->attr
.intent
!= INTENT_IN
443 proc
->attr
.implicit_pure
= 0;
445 if (proc
->attr
.subroutine
&& sym
->attr
.intent
== INTENT_UNKNOWN
447 proc
->attr
.implicit_pure
= 0;
451 if (gfc_elemental (proc
))
454 if (sym
->attr
.codimension
455 || (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)
456 && CLASS_DATA (sym
)->attr
.codimension
))
458 gfc_error ("Coarray dummy argument %qs at %L to elemental "
459 "procedure", sym
->name
, &sym
->declared_at
);
463 if (sym
->as
|| (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)
464 && CLASS_DATA (sym
)->as
))
466 gfc_error ("Argument %qs of elemental procedure at %L must "
467 "be scalar", sym
->name
, &sym
->declared_at
);
471 if (sym
->attr
.allocatable
472 || (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)
473 && CLASS_DATA (sym
)->attr
.allocatable
))
475 gfc_error ("Argument %qs of elemental procedure at %L cannot "
476 "have the ALLOCATABLE attribute", sym
->name
,
481 if (sym
->attr
.pointer
482 || (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)
483 && CLASS_DATA (sym
)->attr
.class_pointer
))
485 gfc_error ("Argument %qs of elemental procedure at %L cannot "
486 "have the POINTER attribute", sym
->name
,
491 if (sym
->attr
.flavor
== FL_PROCEDURE
)
493 gfc_error ("Dummy procedure %qs not allowed in elemental "
494 "procedure %qs at %L", sym
->name
, proc
->name
,
499 /* Fortran 2008 Corrigendum 1, C1290a. */
500 if (sym
->attr
.intent
== INTENT_UNKNOWN
&& !sym
->attr
.value
)
502 gfc_error ("Argument %qs of elemental procedure %qs at %L must "
503 "have its INTENT specified or have the VALUE "
504 "attribute", sym
->name
, proc
->name
,
510 /* Each dummy shall be specified to be scalar. */
511 if (proc
->attr
.proc
== PROC_ST_FUNCTION
)
515 gfc_error ("Argument %qs of statement function at %L must "
516 "be scalar", sym
->name
, &sym
->declared_at
);
520 if (sym
->ts
.type
== BT_CHARACTER
)
522 gfc_charlen
*cl
= sym
->ts
.u
.cl
;
523 if (!cl
|| !cl
->length
|| cl
->length
->expr_type
!= EXPR_CONSTANT
)
525 gfc_error ("Character-valued argument %qs of statement "
526 "function at %L must have constant length",
527 sym
->name
, &sym
->declared_at
);
533 formal_arg_flag
= false;
537 /* Work function called when searching for symbols that have argument lists
538 associated with them. */
541 find_arglists (gfc_symbol
*sym
)
543 if (sym
->attr
.if_source
== IFSRC_UNKNOWN
|| sym
->ns
!= gfc_current_ns
544 || gfc_fl_struct (sym
->attr
.flavor
) || sym
->attr
.intrinsic
)
547 resolve_formal_arglist (sym
);
551 /* Given a namespace, resolve all formal argument lists within the namespace.
555 resolve_formal_arglists (gfc_namespace
*ns
)
560 gfc_traverse_ns (ns
, find_arglists
);
565 resolve_contained_fntype (gfc_symbol
*sym
, gfc_namespace
*ns
)
569 if (sym
&& sym
->attr
.flavor
== FL_PROCEDURE
571 && sym
->ns
->parent
->proc_name
572 && sym
->ns
->parent
->proc_name
->attr
.flavor
== FL_PROCEDURE
573 && !strcmp (sym
->name
, sym
->ns
->parent
->proc_name
->name
))
574 gfc_error ("Contained procedure %qs at %L has the same name as its "
575 "encompassing procedure", sym
->name
, &sym
->declared_at
);
577 /* If this namespace is not a function or an entry master function,
579 if (! sym
|| !(sym
->attr
.function
|| sym
->attr
.flavor
== FL_VARIABLE
)
580 || sym
->attr
.entry_master
)
583 /* Try to find out of what the return type is. */
584 if (sym
->result
->ts
.type
== BT_UNKNOWN
&& sym
->result
->ts
.interface
== NULL
)
586 t
= gfc_set_default_type (sym
->result
, 0, ns
);
588 if (!t
&& !sym
->result
->attr
.untyped
)
590 if (sym
->result
== sym
)
591 gfc_error ("Contained function %qs at %L has no IMPLICIT type",
592 sym
->name
, &sym
->declared_at
);
593 else if (!sym
->result
->attr
.proc_pointer
)
594 gfc_error ("Result %qs of contained function %qs at %L has "
595 "no IMPLICIT type", sym
->result
->name
, sym
->name
,
596 &sym
->result
->declared_at
);
597 sym
->result
->attr
.untyped
= 1;
601 /* Fortran 95 Draft Standard, page 51, Section 5.1.1.5, on the Character
602 type, lists the only ways a character length value of * can be used:
603 dummy arguments of procedures, named constants, and function results
604 in external functions. Internal function results and results of module
605 procedures are not on this list, ergo, not permitted. */
607 if (sym
->result
->ts
.type
== BT_CHARACTER
)
609 gfc_charlen
*cl
= sym
->result
->ts
.u
.cl
;
610 if ((!cl
|| !cl
->length
) && !sym
->result
->ts
.deferred
)
612 /* See if this is a module-procedure and adapt error message
615 gcc_assert (ns
->parent
&& ns
->parent
->proc_name
);
616 module_proc
= (ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
);
618 gfc_error ("Character-valued %s %qs at %L must not be"
620 module_proc
? _("module procedure")
621 : _("internal function"),
622 sym
->name
, &sym
->declared_at
);
628 /* Add NEW_ARGS to the formal argument list of PROC, taking care not to
629 introduce duplicates. */
632 merge_argument_lists (gfc_symbol
*proc
, gfc_formal_arglist
*new_args
)
634 gfc_formal_arglist
*f
, *new_arglist
;
637 for (; new_args
!= NULL
; new_args
= new_args
->next
)
639 new_sym
= new_args
->sym
;
640 /* See if this arg is already in the formal argument list. */
641 for (f
= proc
->formal
; f
; f
= f
->next
)
643 if (new_sym
== f
->sym
)
650 /* Add a new argument. Argument order is not important. */
651 new_arglist
= gfc_get_formal_arglist ();
652 new_arglist
->sym
= new_sym
;
653 new_arglist
->next
= proc
->formal
;
654 proc
->formal
= new_arglist
;
659 /* Flag the arguments that are not present in all entries. */
662 check_argument_lists (gfc_symbol
*proc
, gfc_formal_arglist
*new_args
)
664 gfc_formal_arglist
*f
, *head
;
667 for (f
= proc
->formal
; f
; f
= f
->next
)
672 for (new_args
= head
; new_args
; new_args
= new_args
->next
)
674 if (new_args
->sym
== f
->sym
)
681 f
->sym
->attr
.not_always_present
= 1;
686 /* Resolve alternate entry points. If a symbol has multiple entry points we
687 create a new master symbol for the main routine, and turn the existing
688 symbol into an entry point. */
691 resolve_entries (gfc_namespace
*ns
)
693 gfc_namespace
*old_ns
;
697 char name
[GFC_MAX_SYMBOL_LEN
+ 1];
698 static int master_count
= 0;
700 if (ns
->proc_name
== NULL
)
703 /* No need to do anything if this procedure doesn't have alternate entry
708 /* We may already have resolved alternate entry points. */
709 if (ns
->proc_name
->attr
.entry_master
)
712 /* If this isn't a procedure something has gone horribly wrong. */
713 gcc_assert (ns
->proc_name
->attr
.flavor
== FL_PROCEDURE
);
715 /* Remember the current namespace. */
716 old_ns
= gfc_current_ns
;
720 /* Add the main entry point to the list of entry points. */
721 el
= gfc_get_entry_list ();
722 el
->sym
= ns
->proc_name
;
724 el
->next
= ns
->entries
;
726 ns
->proc_name
->attr
.entry
= 1;
728 /* If it is a module function, it needs to be in the right namespace
729 so that gfc_get_fake_result_decl can gather up the results. The
730 need for this arose in get_proc_name, where these beasts were
731 left in their own namespace, to keep prior references linked to
732 the entry declaration.*/
733 if (ns
->proc_name
->attr
.function
734 && ns
->parent
&& ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
)
737 /* Do the same for entries where the master is not a module
738 procedure. These are retained in the module namespace because
739 of the module procedure declaration. */
740 for (el
= el
->next
; el
; el
= el
->next
)
741 if (el
->sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
742 && el
->sym
->attr
.mod_proc
)
746 /* Add an entry statement for it. */
747 c
= gfc_get_code (EXEC_ENTRY
);
752 /* Create a new symbol for the master function. */
753 /* Give the internal function a unique name (within this file).
754 Also include the function name so the user has some hope of figuring
755 out what is going on. */
756 snprintf (name
, GFC_MAX_SYMBOL_LEN
, "master.%d.%s",
757 master_count
++, ns
->proc_name
->name
);
758 gfc_get_ha_symbol (name
, &proc
);
759 gcc_assert (proc
!= NULL
);
761 gfc_add_procedure (&proc
->attr
, PROC_INTERNAL
, proc
->name
, NULL
);
762 if (ns
->proc_name
->attr
.subroutine
)
763 gfc_add_subroutine (&proc
->attr
, proc
->name
, NULL
);
767 gfc_typespec
*ts
, *fts
;
768 gfc_array_spec
*as
, *fas
;
769 gfc_add_function (&proc
->attr
, proc
->name
, NULL
);
771 fas
= ns
->entries
->sym
->as
;
772 fas
= fas
? fas
: ns
->entries
->sym
->result
->as
;
773 fts
= &ns
->entries
->sym
->result
->ts
;
774 if (fts
->type
== BT_UNKNOWN
)
775 fts
= gfc_get_default_type (ns
->entries
->sym
->result
->name
, NULL
);
776 for (el
= ns
->entries
->next
; el
; el
= el
->next
)
778 ts
= &el
->sym
->result
->ts
;
780 as
= as
? as
: el
->sym
->result
->as
;
781 if (ts
->type
== BT_UNKNOWN
)
782 ts
= gfc_get_default_type (el
->sym
->result
->name
, NULL
);
784 if (! gfc_compare_types (ts
, fts
)
785 || (el
->sym
->result
->attr
.dimension
786 != ns
->entries
->sym
->result
->attr
.dimension
)
787 || (el
->sym
->result
->attr
.pointer
788 != ns
->entries
->sym
->result
->attr
.pointer
))
790 else if (as
&& fas
&& ns
->entries
->sym
->result
!= el
->sym
->result
791 && gfc_compare_array_spec (as
, fas
) == 0)
792 gfc_error ("Function %s at %L has entries with mismatched "
793 "array specifications", ns
->entries
->sym
->name
,
794 &ns
->entries
->sym
->declared_at
);
795 /* The characteristics need to match and thus both need to have
796 the same string length, i.e. both len=*, or both len=4.
797 Having both len=<variable> is also possible, but difficult to
798 check at compile time. */
799 else if (ts
->type
== BT_CHARACTER
&& ts
->u
.cl
&& fts
->u
.cl
800 && (((ts
->u
.cl
->length
&& !fts
->u
.cl
->length
)
801 ||(!ts
->u
.cl
->length
&& fts
->u
.cl
->length
))
803 && ts
->u
.cl
->length
->expr_type
804 != fts
->u
.cl
->length
->expr_type
)
806 && ts
->u
.cl
->length
->expr_type
== EXPR_CONSTANT
807 && mpz_cmp (ts
->u
.cl
->length
->value
.integer
,
808 fts
->u
.cl
->length
->value
.integer
) != 0)))
809 gfc_notify_std (GFC_STD_GNU
, "Function %s at %L with "
810 "entries returning variables of different "
811 "string lengths", ns
->entries
->sym
->name
,
812 &ns
->entries
->sym
->declared_at
);
817 sym
= ns
->entries
->sym
->result
;
818 /* All result types the same. */
820 if (sym
->attr
.dimension
)
821 gfc_set_array_spec (proc
, gfc_copy_array_spec (sym
->as
), NULL
);
822 if (sym
->attr
.pointer
)
823 gfc_add_pointer (&proc
->attr
, NULL
);
827 /* Otherwise the result will be passed through a union by
829 proc
->attr
.mixed_entry_master
= 1;
830 for (el
= ns
->entries
; el
; el
= el
->next
)
832 sym
= el
->sym
->result
;
833 if (sym
->attr
.dimension
)
835 if (el
== ns
->entries
)
836 gfc_error ("FUNCTION result %s can't be an array in "
837 "FUNCTION %s at %L", sym
->name
,
838 ns
->entries
->sym
->name
, &sym
->declared_at
);
840 gfc_error ("ENTRY result %s can't be an array in "
841 "FUNCTION %s at %L", sym
->name
,
842 ns
->entries
->sym
->name
, &sym
->declared_at
);
844 else if (sym
->attr
.pointer
)
846 if (el
== ns
->entries
)
847 gfc_error ("FUNCTION result %s can't be a POINTER in "
848 "FUNCTION %s at %L", sym
->name
,
849 ns
->entries
->sym
->name
, &sym
->declared_at
);
851 gfc_error ("ENTRY result %s can't be a POINTER in "
852 "FUNCTION %s at %L", sym
->name
,
853 ns
->entries
->sym
->name
, &sym
->declared_at
);
858 if (ts
->type
== BT_UNKNOWN
)
859 ts
= gfc_get_default_type (sym
->name
, NULL
);
863 if (ts
->kind
== gfc_default_integer_kind
)
867 if (ts
->kind
== gfc_default_real_kind
868 || ts
->kind
== gfc_default_double_kind
)
872 if (ts
->kind
== gfc_default_complex_kind
)
876 if (ts
->kind
== gfc_default_logical_kind
)
880 /* We will issue error elsewhere. */
888 if (el
== ns
->entries
)
889 gfc_error ("FUNCTION result %s can't be of type %s "
890 "in FUNCTION %s at %L", sym
->name
,
891 gfc_typename (ts
), ns
->entries
->sym
->name
,
894 gfc_error ("ENTRY result %s can't be of type %s "
895 "in FUNCTION %s at %L", sym
->name
,
896 gfc_typename (ts
), ns
->entries
->sym
->name
,
903 proc
->attr
.access
= ACCESS_PRIVATE
;
904 proc
->attr
.entry_master
= 1;
906 /* Merge all the entry point arguments. */
907 for (el
= ns
->entries
; el
; el
= el
->next
)
908 merge_argument_lists (proc
, el
->sym
->formal
);
910 /* Check the master formal arguments for any that are not
911 present in all entry points. */
912 for (el
= ns
->entries
; el
; el
= el
->next
)
913 check_argument_lists (proc
, el
->sym
->formal
);
915 /* Use the master function for the function body. */
916 ns
->proc_name
= proc
;
918 /* Finalize the new symbols. */
919 gfc_commit_symbols ();
921 /* Restore the original namespace. */
922 gfc_current_ns
= old_ns
;
926 /* Resolve common variables. */
928 resolve_common_vars (gfc_common_head
*common_block
, bool named_common
)
930 gfc_symbol
*csym
= common_block
->head
;
932 for (; csym
; csym
= csym
->common_next
)
934 /* gfc_add_in_common may have been called before, but the reported errors
935 have been ignored to continue parsing.
936 We do the checks again here. */
937 if (!csym
->attr
.use_assoc
)
938 gfc_add_in_common (&csym
->attr
, csym
->name
, &common_block
->where
);
940 if (csym
->value
|| csym
->attr
.data
)
942 if (!csym
->ns
->is_block_data
)
943 gfc_notify_std (GFC_STD_GNU
, "Variable %qs at %L is in COMMON "
944 "but only in BLOCK DATA initialization is "
945 "allowed", csym
->name
, &csym
->declared_at
);
946 else if (!named_common
)
947 gfc_notify_std (GFC_STD_GNU
, "Initialized variable %qs at %L is "
948 "in a blank COMMON but initialization is only "
949 "allowed in named common blocks", csym
->name
,
953 if (UNLIMITED_POLY (csym
))
954 gfc_error_now ("%qs in cannot appear in COMMON at %L "
955 "[F2008:C5100]", csym
->name
, &csym
->declared_at
);
957 if (csym
->ts
.type
!= BT_DERIVED
)
960 if (!(csym
->ts
.u
.derived
->attr
.sequence
961 || csym
->ts
.u
.derived
->attr
.is_bind_c
))
962 gfc_error_now ("Derived type variable %qs in COMMON at %L "
963 "has neither the SEQUENCE nor the BIND(C) "
964 "attribute", csym
->name
, &csym
->declared_at
);
965 if (csym
->ts
.u
.derived
->attr
.alloc_comp
)
966 gfc_error_now ("Derived type variable %qs in COMMON at %L "
967 "has an ultimate component that is "
968 "allocatable", csym
->name
, &csym
->declared_at
);
969 if (gfc_has_default_initializer (csym
->ts
.u
.derived
))
970 gfc_error_now ("Derived type variable %qs in COMMON at %L "
971 "may not have default initializer", csym
->name
,
974 if (csym
->attr
.flavor
== FL_UNKNOWN
&& !csym
->attr
.proc_pointer
)
975 gfc_add_flavor (&csym
->attr
, FL_VARIABLE
, csym
->name
, &csym
->declared_at
);
979 /* Resolve common blocks. */
981 resolve_common_blocks (gfc_symtree
*common_root
)
986 if (common_root
== NULL
)
989 if (common_root
->left
)
990 resolve_common_blocks (common_root
->left
);
991 if (common_root
->right
)
992 resolve_common_blocks (common_root
->right
);
994 resolve_common_vars (common_root
->n
.common
, true);
996 /* The common name is a global name - in Fortran 2003 also if it has a
997 C binding name, since Fortran 2008 only the C binding name is a global
999 if (!common_root
->n
.common
->binding_label
1000 || gfc_notification_std (GFC_STD_F2008
))
1002 gsym
= gfc_find_gsymbol (gfc_gsym_root
,
1003 common_root
->n
.common
->name
);
1005 if (gsym
&& gfc_notification_std (GFC_STD_F2008
)
1006 && gsym
->type
== GSYM_COMMON
1007 && ((common_root
->n
.common
->binding_label
1008 && (!gsym
->binding_label
1009 || strcmp (common_root
->n
.common
->binding_label
,
1010 gsym
->binding_label
) != 0))
1011 || (!common_root
->n
.common
->binding_label
1012 && gsym
->binding_label
)))
1014 gfc_error ("In Fortran 2003 COMMON %qs block at %L is a global "
1015 "identifier and must thus have the same binding name "
1016 "as the same-named COMMON block at %L: %s vs %s",
1017 common_root
->n
.common
->name
, &common_root
->n
.common
->where
,
1019 common_root
->n
.common
->binding_label
1020 ? common_root
->n
.common
->binding_label
: "(blank)",
1021 gsym
->binding_label
? gsym
->binding_label
: "(blank)");
1025 if (gsym
&& gsym
->type
!= GSYM_COMMON
1026 && !common_root
->n
.common
->binding_label
)
1028 gfc_error ("COMMON block %qs at %L uses the same global identifier "
1030 common_root
->n
.common
->name
, &common_root
->n
.common
->where
,
1034 if (gsym
&& gsym
->type
!= GSYM_COMMON
)
1036 gfc_error ("Fortran 2008: COMMON block %qs with binding label at "
1037 "%L sharing the identifier with global non-COMMON-block "
1038 "entity at %L", common_root
->n
.common
->name
,
1039 &common_root
->n
.common
->where
, &gsym
->where
);
1044 gsym
= gfc_get_gsymbol (common_root
->n
.common
->name
);
1045 gsym
->type
= GSYM_COMMON
;
1046 gsym
->where
= common_root
->n
.common
->where
;
1052 if (common_root
->n
.common
->binding_label
)
1054 gsym
= gfc_find_gsymbol (gfc_gsym_root
,
1055 common_root
->n
.common
->binding_label
);
1056 if (gsym
&& gsym
->type
!= GSYM_COMMON
)
1058 gfc_error ("COMMON block at %L with binding label %s uses the same "
1059 "global identifier as entity at %L",
1060 &common_root
->n
.common
->where
,
1061 common_root
->n
.common
->binding_label
, &gsym
->where
);
1066 gsym
= gfc_get_gsymbol (common_root
->n
.common
->binding_label
);
1067 gsym
->type
= GSYM_COMMON
;
1068 gsym
->where
= common_root
->n
.common
->where
;
1074 gfc_find_symbol (common_root
->name
, gfc_current_ns
, 0, &sym
);
1078 if (sym
->attr
.flavor
== FL_PARAMETER
)
1079 gfc_error ("COMMON block %qs at %L is used as PARAMETER at %L",
1080 sym
->name
, &common_root
->n
.common
->where
, &sym
->declared_at
);
1082 if (sym
->attr
.external
)
1083 gfc_error ("COMMON block %qs at %L can not have the EXTERNAL attribute",
1084 sym
->name
, &common_root
->n
.common
->where
);
1086 if (sym
->attr
.intrinsic
)
1087 gfc_error ("COMMON block %qs at %L is also an intrinsic procedure",
1088 sym
->name
, &common_root
->n
.common
->where
);
1089 else if (sym
->attr
.result
1090 || gfc_is_function_return_value (sym
, gfc_current_ns
))
1091 gfc_notify_std (GFC_STD_F2003
, "COMMON block %qs at %L "
1092 "that is also a function result", sym
->name
,
1093 &common_root
->n
.common
->where
);
1094 else if (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.proc
!= PROC_INTERNAL
1095 && sym
->attr
.proc
!= PROC_ST_FUNCTION
)
1096 gfc_notify_std (GFC_STD_F2003
, "COMMON block %qs at %L "
1097 "that is also a global procedure", sym
->name
,
1098 &common_root
->n
.common
->where
);
1102 /* Resolve contained function types. Because contained functions can call one
1103 another, they have to be worked out before any of the contained procedures
1106 The good news is that if a function doesn't already have a type, the only
1107 way it can get one is through an IMPLICIT type or a RESULT variable, because
1108 by definition contained functions are contained namespace they're contained
1109 in, not in a sibling or parent namespace. */
1112 resolve_contained_functions (gfc_namespace
*ns
)
1114 gfc_namespace
*child
;
1117 resolve_formal_arglists (ns
);
1119 for (child
= ns
->contained
; child
; child
= child
->sibling
)
1121 /* Resolve alternate entry points first. */
1122 resolve_entries (child
);
1124 /* Then check function return types. */
1125 resolve_contained_fntype (child
->proc_name
, child
);
1126 for (el
= child
->entries
; el
; el
= el
->next
)
1127 resolve_contained_fntype (el
->sym
, child
);
1132 static bool resolve_fl_derived0 (gfc_symbol
*sym
);
1133 static bool resolve_fl_struct (gfc_symbol
*sym
);
1136 /* Resolve all of the elements of a structure constructor and make sure that
1137 the types are correct. The 'init' flag indicates that the given
1138 constructor is an initializer. */
1141 resolve_structure_cons (gfc_expr
*expr
, int init
)
1143 gfc_constructor
*cons
;
1144 gfc_component
*comp
;
1150 if (expr
->ts
.type
== BT_DERIVED
|| expr
->ts
.type
== BT_UNION
)
1152 if (expr
->ts
.u
.derived
->attr
.flavor
== FL_DERIVED
)
1153 resolve_fl_derived0 (expr
->ts
.u
.derived
);
1155 resolve_fl_struct (expr
->ts
.u
.derived
);
1158 cons
= gfc_constructor_first (expr
->value
.constructor
);
1160 /* A constructor may have references if it is the result of substituting a
1161 parameter variable. In this case we just pull out the component we
1164 comp
= expr
->ref
->u
.c
.sym
->components
;
1166 comp
= expr
->ts
.u
.derived
->components
;
1168 for (; comp
&& cons
; comp
= comp
->next
, cons
= gfc_constructor_next (cons
))
1175 /* Unions use an EXPR_NULL contrived expression to tell the translation
1176 phase to generate an initializer of the appropriate length.
1178 if (cons
->expr
->ts
.type
== BT_UNION
&& cons
->expr
->expr_type
== EXPR_NULL
)
1181 if (!gfc_resolve_expr (cons
->expr
))
1187 rank
= comp
->as
? comp
->as
->rank
: 0;
1188 if (comp
->ts
.type
== BT_CLASS
&& CLASS_DATA (comp
)->as
)
1189 rank
= CLASS_DATA (comp
)->as
->rank
;
1191 if (cons
->expr
->expr_type
!= EXPR_NULL
&& rank
!= cons
->expr
->rank
1192 && (comp
->attr
.allocatable
|| cons
->expr
->rank
))
1194 gfc_error ("The rank of the element in the structure "
1195 "constructor at %L does not match that of the "
1196 "component (%d/%d)", &cons
->expr
->where
,
1197 cons
->expr
->rank
, rank
);
1201 /* If we don't have the right type, try to convert it. */
1203 if (!comp
->attr
.proc_pointer
&&
1204 !gfc_compare_types (&cons
->expr
->ts
, &comp
->ts
))
1206 if (strcmp (comp
->name
, "_extends") == 0)
1208 /* Can afford to be brutal with the _extends initializer.
1209 The derived type can get lost because it is PRIVATE
1210 but it is not usage constrained by the standard. */
1211 cons
->expr
->ts
= comp
->ts
;
1213 else if (comp
->attr
.pointer
&& cons
->expr
->ts
.type
!= BT_UNKNOWN
)
1215 gfc_error ("The element in the structure constructor at %L, "
1216 "for pointer component %qs, is %s but should be %s",
1217 &cons
->expr
->where
, comp
->name
,
1218 gfc_basic_typename (cons
->expr
->ts
.type
),
1219 gfc_basic_typename (comp
->ts
.type
));
1224 bool t2
= gfc_convert_type (cons
->expr
, &comp
->ts
, 1);
1230 /* For strings, the length of the constructor should be the same as
1231 the one of the structure, ensure this if the lengths are known at
1232 compile time and when we are dealing with PARAMETER or structure
1234 if (cons
->expr
->ts
.type
== BT_CHARACTER
&& comp
->ts
.u
.cl
1235 && comp
->ts
.u
.cl
->length
1236 && comp
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
1237 && cons
->expr
->ts
.u
.cl
&& cons
->expr
->ts
.u
.cl
->length
1238 && cons
->expr
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
1239 && cons
->expr
->rank
!= 0
1240 && mpz_cmp (cons
->expr
->ts
.u
.cl
->length
->value
.integer
,
1241 comp
->ts
.u
.cl
->length
->value
.integer
) != 0)
1243 if (cons
->expr
->expr_type
== EXPR_VARIABLE
1244 && cons
->expr
->symtree
->n
.sym
->attr
.flavor
== FL_PARAMETER
)
1246 /* Wrap the parameter in an array constructor (EXPR_ARRAY)
1247 to make use of the gfc_resolve_character_array_constructor
1248 machinery. The expression is later simplified away to
1249 an array of string literals. */
1250 gfc_expr
*para
= cons
->expr
;
1251 cons
->expr
= gfc_get_expr ();
1252 cons
->expr
->ts
= para
->ts
;
1253 cons
->expr
->where
= para
->where
;
1254 cons
->expr
->expr_type
= EXPR_ARRAY
;
1255 cons
->expr
->rank
= para
->rank
;
1256 cons
->expr
->shape
= gfc_copy_shape (para
->shape
, para
->rank
);
1257 gfc_constructor_append_expr (&cons
->expr
->value
.constructor
,
1258 para
, &cons
->expr
->where
);
1261 if (cons
->expr
->expr_type
== EXPR_ARRAY
)
1263 /* Rely on the cleanup of the namespace to deal correctly with
1264 the old charlen. (There was a block here that attempted to
1265 remove the charlen but broke the chain in so doing.) */
1266 cons
->expr
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
1267 cons
->expr
->ts
.u
.cl
->length_from_typespec
= true;
1268 cons
->expr
->ts
.u
.cl
->length
= gfc_copy_expr (comp
->ts
.u
.cl
->length
);
1269 gfc_resolve_character_array_constructor (cons
->expr
);
1273 if (cons
->expr
->expr_type
== EXPR_NULL
1274 && !(comp
->attr
.pointer
|| comp
->attr
.allocatable
1275 || comp
->attr
.proc_pointer
|| comp
->ts
.f90_type
== BT_VOID
1276 || (comp
->ts
.type
== BT_CLASS
1277 && (CLASS_DATA (comp
)->attr
.class_pointer
1278 || CLASS_DATA (comp
)->attr
.allocatable
))))
1281 gfc_error ("The NULL in the structure constructor at %L is "
1282 "being applied to component %qs, which is neither "
1283 "a POINTER nor ALLOCATABLE", &cons
->expr
->where
,
1287 if (comp
->attr
.proc_pointer
&& comp
->ts
.interface
)
1289 /* Check procedure pointer interface. */
1290 gfc_symbol
*s2
= NULL
;
1295 c2
= gfc_get_proc_ptr_comp (cons
->expr
);
1298 s2
= c2
->ts
.interface
;
1301 else if (cons
->expr
->expr_type
== EXPR_FUNCTION
)
1303 s2
= cons
->expr
->symtree
->n
.sym
->result
;
1304 name
= cons
->expr
->symtree
->n
.sym
->result
->name
;
1306 else if (cons
->expr
->expr_type
!= EXPR_NULL
)
1308 s2
= cons
->expr
->symtree
->n
.sym
;
1309 name
= cons
->expr
->symtree
->n
.sym
->name
;
1312 if (s2
&& !gfc_compare_interfaces (comp
->ts
.interface
, s2
, name
, 0, 1,
1313 err
, sizeof (err
), NULL
, NULL
))
1315 gfc_error_opt (OPT_Wargument_mismatch
,
1316 "Interface mismatch for procedure-pointer "
1317 "component %qs in structure constructor at %L:"
1318 " %s", comp
->name
, &cons
->expr
->where
, err
);
1323 if (!comp
->attr
.pointer
|| comp
->attr
.proc_pointer
1324 || cons
->expr
->expr_type
== EXPR_NULL
)
1327 a
= gfc_expr_attr (cons
->expr
);
1329 if (!a
.pointer
&& !a
.target
)
1332 gfc_error ("The element in the structure constructor at %L, "
1333 "for pointer component %qs should be a POINTER or "
1334 "a TARGET", &cons
->expr
->where
, comp
->name
);
1339 /* F08:C461. Additional checks for pointer initialization. */
1343 gfc_error ("Pointer initialization target at %L "
1344 "must not be ALLOCATABLE ", &cons
->expr
->where
);
1349 gfc_error ("Pointer initialization target at %L "
1350 "must have the SAVE attribute", &cons
->expr
->where
);
1354 /* F2003, C1272 (3). */
1355 bool impure
= cons
->expr
->expr_type
== EXPR_VARIABLE
1356 && (gfc_impure_variable (cons
->expr
->symtree
->n
.sym
)
1357 || gfc_is_coindexed (cons
->expr
));
1358 if (impure
&& gfc_pure (NULL
))
1361 gfc_error ("Invalid expression in the structure constructor for "
1362 "pointer component %qs at %L in PURE procedure",
1363 comp
->name
, &cons
->expr
->where
);
1367 gfc_unset_implicit_pure (NULL
);
1374 /****************** Expression name resolution ******************/
1376 /* Returns 0 if a symbol was not declared with a type or
1377 attribute declaration statement, nonzero otherwise. */
1380 was_declared (gfc_symbol
*sym
)
1386 if (!a
.implicit_type
&& sym
->ts
.type
!= BT_UNKNOWN
)
1389 if (a
.allocatable
|| a
.dimension
|| a
.dummy
|| a
.external
|| a
.intrinsic
1390 || a
.optional
|| a
.pointer
|| a
.save
|| a
.target
|| a
.volatile_
1391 || a
.value
|| a
.access
!= ACCESS_UNKNOWN
|| a
.intent
!= INTENT_UNKNOWN
1392 || a
.asynchronous
|| a
.codimension
)
1399 /* Determine if a symbol is generic or not. */
1402 generic_sym (gfc_symbol
*sym
)
1406 if (sym
->attr
.generic
||
1407 (sym
->attr
.intrinsic
&& gfc_generic_intrinsic (sym
->name
)))
1410 if (was_declared (sym
) || sym
->ns
->parent
== NULL
)
1413 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &s
);
1420 return generic_sym (s
);
1427 /* Determine if a symbol is specific or not. */
1430 specific_sym (gfc_symbol
*sym
)
1434 if (sym
->attr
.if_source
== IFSRC_IFBODY
1435 || sym
->attr
.proc
== PROC_MODULE
1436 || sym
->attr
.proc
== PROC_INTERNAL
1437 || sym
->attr
.proc
== PROC_ST_FUNCTION
1438 || (sym
->attr
.intrinsic
&& gfc_specific_intrinsic (sym
->name
))
1439 || sym
->attr
.external
)
1442 if (was_declared (sym
) || sym
->ns
->parent
== NULL
)
1445 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &s
);
1447 return (s
== NULL
) ? 0 : specific_sym (s
);
1451 /* Figure out if the procedure is specific, generic or unknown. */
1454 { PTYPE_GENERIC
= 1, PTYPE_SPECIFIC
, PTYPE_UNKNOWN
};
1457 procedure_kind (gfc_symbol
*sym
)
1459 if (generic_sym (sym
))
1460 return PTYPE_GENERIC
;
1462 if (specific_sym (sym
))
1463 return PTYPE_SPECIFIC
;
1465 return PTYPE_UNKNOWN
;
1468 /* Check references to assumed size arrays. The flag need_full_assumed_size
1469 is nonzero when matching actual arguments. */
1471 static int need_full_assumed_size
= 0;
1474 check_assumed_size_reference (gfc_symbol
*sym
, gfc_expr
*e
)
1476 if (need_full_assumed_size
|| !(sym
->as
&& sym
->as
->type
== AS_ASSUMED_SIZE
))
1479 /* FIXME: The comparison "e->ref->u.ar.type == AR_FULL" is wrong.
1480 What should it be? */
1481 if (e
->ref
&& (e
->ref
->u
.ar
.end
[e
->ref
->u
.ar
.as
->rank
- 1] == NULL
)
1482 && (e
->ref
->u
.ar
.as
->type
== AS_ASSUMED_SIZE
)
1483 && (e
->ref
->u
.ar
.type
== AR_FULL
))
1485 gfc_error ("The upper bound in the last dimension must "
1486 "appear in the reference to the assumed size "
1487 "array %qs at %L", sym
->name
, &e
->where
);
1494 /* Look for bad assumed size array references in argument expressions
1495 of elemental and array valued intrinsic procedures. Since this is
1496 called from procedure resolution functions, it only recurses at
1500 resolve_assumed_size_actual (gfc_expr
*e
)
1505 switch (e
->expr_type
)
1508 if (e
->symtree
&& check_assumed_size_reference (e
->symtree
->n
.sym
, e
))
1513 if (resolve_assumed_size_actual (e
->value
.op
.op1
)
1514 || resolve_assumed_size_actual (e
->value
.op
.op2
))
1525 /* Check a generic procedure, passed as an actual argument, to see if
1526 there is a matching specific name. If none, it is an error, and if
1527 more than one, the reference is ambiguous. */
1529 count_specific_procs (gfc_expr
*e
)
1536 sym
= e
->symtree
->n
.sym
;
1538 for (p
= sym
->generic
; p
; p
= p
->next
)
1539 if (strcmp (sym
->name
, p
->sym
->name
) == 0)
1541 e
->symtree
= gfc_find_symtree (p
->sym
->ns
->sym_root
,
1547 gfc_error ("%qs at %L is ambiguous", e
->symtree
->n
.sym
->name
,
1551 gfc_error ("GENERIC procedure %qs is not allowed as an actual "
1552 "argument at %L", sym
->name
, &e
->where
);
1558 /* See if a call to sym could possibly be a not allowed RECURSION because of
1559 a missing RECURSIVE declaration. This means that either sym is the current
1560 context itself, or sym is the parent of a contained procedure calling its
1561 non-RECURSIVE containing procedure.
1562 This also works if sym is an ENTRY. */
1565 is_illegal_recursion (gfc_symbol
* sym
, gfc_namespace
* context
)
1567 gfc_symbol
* proc_sym
;
1568 gfc_symbol
* context_proc
;
1569 gfc_namespace
* real_context
;
1571 if (sym
->attr
.flavor
== FL_PROGRAM
1572 || gfc_fl_struct (sym
->attr
.flavor
))
1575 gcc_assert (sym
->attr
.flavor
== FL_PROCEDURE
);
1577 /* If we've got an ENTRY, find real procedure. */
1578 if (sym
->attr
.entry
&& sym
->ns
->entries
)
1579 proc_sym
= sym
->ns
->entries
->sym
;
1583 /* If sym is RECURSIVE, all is well of course. */
1584 if (proc_sym
->attr
.recursive
|| flag_recursive
)
1587 /* Find the context procedure's "real" symbol if it has entries.
1588 We look for a procedure symbol, so recurse on the parents if we don't
1589 find one (like in case of a BLOCK construct). */
1590 for (real_context
= context
; ; real_context
= real_context
->parent
)
1592 /* We should find something, eventually! */
1593 gcc_assert (real_context
);
1595 context_proc
= (real_context
->entries
? real_context
->entries
->sym
1596 : real_context
->proc_name
);
1598 /* In some special cases, there may not be a proc_name, like for this
1600 real(bad_kind()) function foo () ...
1601 when checking the call to bad_kind ().
1602 In these cases, we simply return here and assume that the
1607 if (context_proc
->attr
.flavor
!= FL_LABEL
)
1611 /* A call from sym's body to itself is recursion, of course. */
1612 if (context_proc
== proc_sym
)
1615 /* The same is true if context is a contained procedure and sym the
1617 if (context_proc
->attr
.contained
)
1619 gfc_symbol
* parent_proc
;
1621 gcc_assert (context
->parent
);
1622 parent_proc
= (context
->parent
->entries
? context
->parent
->entries
->sym
1623 : context
->parent
->proc_name
);
1625 if (parent_proc
== proc_sym
)
1633 /* Resolve an intrinsic procedure: Set its function/subroutine attribute,
1634 its typespec and formal argument list. */
1637 gfc_resolve_intrinsic (gfc_symbol
*sym
, locus
*loc
)
1639 gfc_intrinsic_sym
* isym
= NULL
;
1645 /* Already resolved. */
1646 if (sym
->from_intmod
&& sym
->ts
.type
!= BT_UNKNOWN
)
1649 /* We already know this one is an intrinsic, so we don't call
1650 gfc_is_intrinsic for full checking but rather use gfc_find_function and
1651 gfc_find_subroutine directly to check whether it is a function or
1654 if (sym
->intmod_sym_id
&& sym
->attr
.subroutine
)
1656 gfc_isym_id id
= gfc_isym_id_by_intmod_sym (sym
);
1657 isym
= gfc_intrinsic_subroutine_by_id (id
);
1659 else if (sym
->intmod_sym_id
)
1661 gfc_isym_id id
= gfc_isym_id_by_intmod_sym (sym
);
1662 isym
= gfc_intrinsic_function_by_id (id
);
1664 else if (!sym
->attr
.subroutine
)
1665 isym
= gfc_find_function (sym
->name
);
1667 if (isym
&& !sym
->attr
.subroutine
)
1669 if (sym
->ts
.type
!= BT_UNKNOWN
&& warn_surprising
1670 && !sym
->attr
.implicit_type
)
1671 gfc_warning (OPT_Wsurprising
,
1672 "Type specified for intrinsic function %qs at %L is"
1673 " ignored", sym
->name
, &sym
->declared_at
);
1675 if (!sym
->attr
.function
&&
1676 !gfc_add_function(&sym
->attr
, sym
->name
, loc
))
1681 else if (isym
|| (isym
= gfc_find_subroutine (sym
->name
)))
1683 if (sym
->ts
.type
!= BT_UNKNOWN
&& !sym
->attr
.implicit_type
)
1685 gfc_error ("Intrinsic subroutine %qs at %L shall not have a type"
1686 " specifier", sym
->name
, &sym
->declared_at
);
1690 if (!sym
->attr
.subroutine
&&
1691 !gfc_add_subroutine(&sym
->attr
, sym
->name
, loc
))
1696 gfc_error ("%qs declared INTRINSIC at %L does not exist", sym
->name
,
1701 gfc_copy_formal_args_intr (sym
, isym
, NULL
);
1703 sym
->attr
.pure
= isym
->pure
;
1704 sym
->attr
.elemental
= isym
->elemental
;
1706 /* Check it is actually available in the standard settings. */
1707 if (!gfc_check_intrinsic_standard (isym
, &symstd
, false, sym
->declared_at
))
1709 gfc_error ("The intrinsic %qs declared INTRINSIC at %L is not "
1710 "available in the current standard settings but %s. Use "
1711 "an appropriate %<-std=*%> option or enable "
1712 "%<-fall-intrinsics%> in order to use it.",
1713 sym
->name
, &sym
->declared_at
, symstd
);
1721 /* Resolve a procedure expression, like passing it to a called procedure or as
1722 RHS for a procedure pointer assignment. */
1725 resolve_procedure_expression (gfc_expr
* expr
)
1729 if (expr
->expr_type
!= EXPR_VARIABLE
)
1731 gcc_assert (expr
->symtree
);
1733 sym
= expr
->symtree
->n
.sym
;
1735 if (sym
->attr
.intrinsic
)
1736 gfc_resolve_intrinsic (sym
, &expr
->where
);
1738 if (sym
->attr
.flavor
!= FL_PROCEDURE
1739 || (sym
->attr
.function
&& sym
->result
== sym
))
1742 /* A non-RECURSIVE procedure that is used as procedure expression within its
1743 own body is in danger of being called recursively. */
1744 if (is_illegal_recursion (sym
, gfc_current_ns
))
1745 gfc_warning (0, "Non-RECURSIVE procedure %qs at %L is possibly calling"
1746 " itself recursively. Declare it RECURSIVE or use"
1747 " %<-frecursive%>", sym
->name
, &expr
->where
);
1753 /* Resolve an actual argument list. Most of the time, this is just
1754 resolving the expressions in the list.
1755 The exception is that we sometimes have to decide whether arguments
1756 that look like procedure arguments are really simple variable
1760 resolve_actual_arglist (gfc_actual_arglist
*arg
, procedure_type ptype
,
1761 bool no_formal_args
)
1764 gfc_symtree
*parent_st
;
1766 gfc_component
*comp
;
1767 int save_need_full_assumed_size
;
1768 bool return_value
= false;
1769 bool actual_arg_sav
= actual_arg
, first_actual_arg_sav
= first_actual_arg
;
1772 first_actual_arg
= true;
1774 for (; arg
; arg
= arg
->next
)
1779 /* Check the label is a valid branching target. */
1782 if (arg
->label
->defined
== ST_LABEL_UNKNOWN
)
1784 gfc_error ("Label %d referenced at %L is never defined",
1785 arg
->label
->value
, &arg
->label
->where
);
1789 first_actual_arg
= false;
1793 if (e
->expr_type
== EXPR_VARIABLE
1794 && e
->symtree
->n
.sym
->attr
.generic
1796 && count_specific_procs (e
) != 1)
1799 if (e
->ts
.type
!= BT_PROCEDURE
)
1801 save_need_full_assumed_size
= need_full_assumed_size
;
1802 if (e
->expr_type
!= EXPR_VARIABLE
)
1803 need_full_assumed_size
= 0;
1804 if (!gfc_resolve_expr (e
))
1806 need_full_assumed_size
= save_need_full_assumed_size
;
1810 /* See if the expression node should really be a variable reference. */
1812 sym
= e
->symtree
->n
.sym
;
1814 if (sym
->attr
.flavor
== FL_PROCEDURE
1815 || sym
->attr
.intrinsic
1816 || sym
->attr
.external
)
1820 /* If a procedure is not already determined to be something else
1821 check if it is intrinsic. */
1822 if (gfc_is_intrinsic (sym
, sym
->attr
.subroutine
, e
->where
))
1823 sym
->attr
.intrinsic
= 1;
1825 if (sym
->attr
.proc
== PROC_ST_FUNCTION
)
1827 gfc_error ("Statement function %qs at %L is not allowed as an "
1828 "actual argument", sym
->name
, &e
->where
);
1831 actual_ok
= gfc_intrinsic_actual_ok (sym
->name
,
1832 sym
->attr
.subroutine
);
1833 if (sym
->attr
.intrinsic
&& actual_ok
== 0)
1835 gfc_error ("Intrinsic %qs at %L is not allowed as an "
1836 "actual argument", sym
->name
, &e
->where
);
1839 if (sym
->attr
.contained
&& !sym
->attr
.use_assoc
1840 && sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)
1842 if (!gfc_notify_std (GFC_STD_F2008
, "Internal procedure %qs is"
1843 " used as actual argument at %L",
1844 sym
->name
, &e
->where
))
1848 if (sym
->attr
.elemental
&& !sym
->attr
.intrinsic
)
1850 gfc_error ("ELEMENTAL non-INTRINSIC procedure %qs is not "
1851 "allowed as an actual argument at %L", sym
->name
,
1855 /* Check if a generic interface has a specific procedure
1856 with the same name before emitting an error. */
1857 if (sym
->attr
.generic
&& count_specific_procs (e
) != 1)
1860 /* Just in case a specific was found for the expression. */
1861 sym
= e
->symtree
->n
.sym
;
1863 /* If the symbol is the function that names the current (or
1864 parent) scope, then we really have a variable reference. */
1866 if (gfc_is_function_return_value (sym
, sym
->ns
))
1869 /* If all else fails, see if we have a specific intrinsic. */
1870 if (sym
->ts
.type
== BT_UNKNOWN
&& sym
->attr
.intrinsic
)
1872 gfc_intrinsic_sym
*isym
;
1874 isym
= gfc_find_function (sym
->name
);
1875 if (isym
== NULL
|| !isym
->specific
)
1877 gfc_error ("Unable to find a specific INTRINSIC procedure "
1878 "for the reference %qs at %L", sym
->name
,
1883 sym
->attr
.intrinsic
= 1;
1884 sym
->attr
.function
= 1;
1887 if (!gfc_resolve_expr (e
))
1892 /* See if the name is a module procedure in a parent unit. */
1894 if (was_declared (sym
) || sym
->ns
->parent
== NULL
)
1897 if (gfc_find_sym_tree (sym
->name
, sym
->ns
->parent
, 1, &parent_st
))
1899 gfc_error ("Symbol %qs at %L is ambiguous", sym
->name
, &e
->where
);
1903 if (parent_st
== NULL
)
1906 sym
= parent_st
->n
.sym
;
1907 e
->symtree
= parent_st
; /* Point to the right thing. */
1909 if (sym
->attr
.flavor
== FL_PROCEDURE
1910 || sym
->attr
.intrinsic
1911 || sym
->attr
.external
)
1913 if (!gfc_resolve_expr (e
))
1919 e
->expr_type
= EXPR_VARIABLE
;
1921 if ((sym
->as
!= NULL
&& sym
->ts
.type
!= BT_CLASS
)
1922 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
1923 && CLASS_DATA (sym
)->as
))
1925 e
->rank
= sym
->ts
.type
== BT_CLASS
1926 ? CLASS_DATA (sym
)->as
->rank
: sym
->as
->rank
;
1927 e
->ref
= gfc_get_ref ();
1928 e
->ref
->type
= REF_ARRAY
;
1929 e
->ref
->u
.ar
.type
= AR_FULL
;
1930 e
->ref
->u
.ar
.as
= sym
->ts
.type
== BT_CLASS
1931 ? CLASS_DATA (sym
)->as
: sym
->as
;
1934 /* Expressions are assigned a default ts.type of BT_PROCEDURE in
1935 primary.c (match_actual_arg). If above code determines that it
1936 is a variable instead, it needs to be resolved as it was not
1937 done at the beginning of this function. */
1938 save_need_full_assumed_size
= need_full_assumed_size
;
1939 if (e
->expr_type
!= EXPR_VARIABLE
)
1940 need_full_assumed_size
= 0;
1941 if (!gfc_resolve_expr (e
))
1943 need_full_assumed_size
= save_need_full_assumed_size
;
1946 /* Check argument list functions %VAL, %LOC and %REF. There is
1947 nothing to do for %REF. */
1948 if (arg
->name
&& arg
->name
[0] == '%')
1950 if (strncmp ("%VAL", arg
->name
, 4) == 0)
1952 if (e
->ts
.type
== BT_CHARACTER
|| e
->ts
.type
== BT_DERIVED
)
1954 gfc_error ("By-value argument at %L is not of numeric "
1961 gfc_error ("By-value argument at %L cannot be an array or "
1962 "an array section", &e
->where
);
1966 /* Intrinsics are still PROC_UNKNOWN here. However,
1967 since same file external procedures are not resolvable
1968 in gfortran, it is a good deal easier to leave them to
1970 if (ptype
!= PROC_UNKNOWN
1971 && ptype
!= PROC_DUMMY
1972 && ptype
!= PROC_EXTERNAL
1973 && ptype
!= PROC_MODULE
)
1975 gfc_error ("By-value argument at %L is not allowed "
1976 "in this context", &e
->where
);
1981 /* Statement functions have already been excluded above. */
1982 else if (strncmp ("%LOC", arg
->name
, 4) == 0
1983 && e
->ts
.type
== BT_PROCEDURE
)
1985 if (e
->symtree
->n
.sym
->attr
.proc
== PROC_INTERNAL
)
1987 gfc_error ("Passing internal procedure at %L by location "
1988 "not allowed", &e
->where
);
1994 comp
= gfc_get_proc_ptr_comp(e
);
1995 if (e
->expr_type
== EXPR_VARIABLE
1996 && comp
&& comp
->attr
.elemental
)
1998 gfc_error ("ELEMENTAL procedure pointer component %qs is not "
1999 "allowed as an actual argument at %L", comp
->name
,
2003 /* Fortran 2008, C1237. */
2004 if (e
->expr_type
== EXPR_VARIABLE
&& gfc_is_coindexed (e
)
2005 && gfc_has_ultimate_pointer (e
))
2007 gfc_error ("Coindexed actual argument at %L with ultimate pointer "
2008 "component", &e
->where
);
2012 first_actual_arg
= false;
2015 return_value
= true;
2018 actual_arg
= actual_arg_sav
;
2019 first_actual_arg
= first_actual_arg_sav
;
2021 return return_value
;
2025 /* Do the checks of the actual argument list that are specific to elemental
2026 procedures. If called with c == NULL, we have a function, otherwise if
2027 expr == NULL, we have a subroutine. */
2030 resolve_elemental_actual (gfc_expr
*expr
, gfc_code
*c
)
2032 gfc_actual_arglist
*arg0
;
2033 gfc_actual_arglist
*arg
;
2034 gfc_symbol
*esym
= NULL
;
2035 gfc_intrinsic_sym
*isym
= NULL
;
2037 gfc_intrinsic_arg
*iformal
= NULL
;
2038 gfc_formal_arglist
*eformal
= NULL
;
2039 bool formal_optional
= false;
2040 bool set_by_optional
= false;
2044 /* Is this an elemental procedure? */
2045 if (expr
&& expr
->value
.function
.actual
!= NULL
)
2047 if (expr
->value
.function
.esym
!= NULL
2048 && expr
->value
.function
.esym
->attr
.elemental
)
2050 arg0
= expr
->value
.function
.actual
;
2051 esym
= expr
->value
.function
.esym
;
2053 else if (expr
->value
.function
.isym
!= NULL
2054 && expr
->value
.function
.isym
->elemental
)
2056 arg0
= expr
->value
.function
.actual
;
2057 isym
= expr
->value
.function
.isym
;
2062 else if (c
&& c
->ext
.actual
!= NULL
)
2064 arg0
= c
->ext
.actual
;
2066 if (c
->resolved_sym
)
2067 esym
= c
->resolved_sym
;
2069 esym
= c
->symtree
->n
.sym
;
2072 if (!esym
->attr
.elemental
)
2078 /* The rank of an elemental is the rank of its array argument(s). */
2079 for (arg
= arg0
; arg
; arg
= arg
->next
)
2081 if (arg
->expr
!= NULL
&& arg
->expr
->rank
!= 0)
2083 rank
= arg
->expr
->rank
;
2084 if (arg
->expr
->expr_type
== EXPR_VARIABLE
2085 && arg
->expr
->symtree
->n
.sym
->attr
.optional
)
2086 set_by_optional
= true;
2088 /* Function specific; set the result rank and shape. */
2092 if (!expr
->shape
&& arg
->expr
->shape
)
2094 expr
->shape
= gfc_get_shape (rank
);
2095 for (i
= 0; i
< rank
; i
++)
2096 mpz_init_set (expr
->shape
[i
], arg
->expr
->shape
[i
]);
2103 /* If it is an array, it shall not be supplied as an actual argument
2104 to an elemental procedure unless an array of the same rank is supplied
2105 as an actual argument corresponding to a nonoptional dummy argument of
2106 that elemental procedure(12.4.1.5). */
2107 formal_optional
= false;
2109 iformal
= isym
->formal
;
2111 eformal
= esym
->formal
;
2113 for (arg
= arg0
; arg
; arg
= arg
->next
)
2117 if (eformal
->sym
&& eformal
->sym
->attr
.optional
)
2118 formal_optional
= true;
2119 eformal
= eformal
->next
;
2121 else if (isym
&& iformal
)
2123 if (iformal
->optional
)
2124 formal_optional
= true;
2125 iformal
= iformal
->next
;
2128 formal_optional
= true;
2130 if (pedantic
&& arg
->expr
!= NULL
2131 && arg
->expr
->expr_type
== EXPR_VARIABLE
2132 && arg
->expr
->symtree
->n
.sym
->attr
.optional
2135 && (set_by_optional
|| arg
->expr
->rank
!= rank
)
2136 && !(isym
&& isym
->id
== GFC_ISYM_CONVERSION
))
2138 gfc_warning (OPT_Wpedantic
,
2139 "%qs at %L is an array and OPTIONAL; IF IT IS "
2140 "MISSING, it cannot be the actual argument of an "
2141 "ELEMENTAL procedure unless there is a non-optional "
2142 "argument with the same rank (12.4.1.5)",
2143 arg
->expr
->symtree
->n
.sym
->name
, &arg
->expr
->where
);
2147 for (arg
= arg0
; arg
; arg
= arg
->next
)
2149 if (arg
->expr
== NULL
|| arg
->expr
->rank
== 0)
2152 /* Being elemental, the last upper bound of an assumed size array
2153 argument must be present. */
2154 if (resolve_assumed_size_actual (arg
->expr
))
2157 /* Elemental procedure's array actual arguments must conform. */
2160 if (!gfc_check_conformance (arg
->expr
, e
, "elemental procedure"))
2167 /* INTENT(OUT) is only allowed for subroutines; if any actual argument
2168 is an array, the intent inout/out variable needs to be also an array. */
2169 if (rank
> 0 && esym
&& expr
== NULL
)
2170 for (eformal
= esym
->formal
, arg
= arg0
; arg
&& eformal
;
2171 arg
= arg
->next
, eformal
= eformal
->next
)
2172 if ((eformal
->sym
->attr
.intent
== INTENT_OUT
2173 || eformal
->sym
->attr
.intent
== INTENT_INOUT
)
2174 && arg
->expr
&& arg
->expr
->rank
== 0)
2176 gfc_error ("Actual argument at %L for INTENT(%s) dummy %qs of "
2177 "ELEMENTAL subroutine %qs is a scalar, but another "
2178 "actual argument is an array", &arg
->expr
->where
,
2179 (eformal
->sym
->attr
.intent
== INTENT_OUT
) ? "OUT"
2180 : "INOUT", eformal
->sym
->name
, esym
->name
);
2187 /* This function does the checking of references to global procedures
2188 as defined in sections 18.1 and 14.1, respectively, of the Fortran
2189 77 and 95 standards. It checks for a gsymbol for the name, making
2190 one if it does not already exist. If it already exists, then the
2191 reference being resolved must correspond to the type of gsymbol.
2192 Otherwise, the new symbol is equipped with the attributes of the
2193 reference. The corresponding code that is called in creating
2194 global entities is parse.c.
2196 In addition, for all but -std=legacy, the gsymbols are used to
2197 check the interfaces of external procedures from the same file.
2198 The namespace of the gsymbol is resolved and then, once this is
2199 done the interface is checked. */
2203 not_in_recursive (gfc_symbol
*sym
, gfc_namespace
*gsym_ns
)
2205 if (!gsym_ns
->proc_name
->attr
.recursive
)
2208 if (sym
->ns
== gsym_ns
)
2211 if (sym
->ns
->parent
&& sym
->ns
->parent
== gsym_ns
)
2218 not_entry_self_reference (gfc_symbol
*sym
, gfc_namespace
*gsym_ns
)
2220 if (gsym_ns
->entries
)
2222 gfc_entry_list
*entry
= gsym_ns
->entries
;
2224 for (; entry
; entry
= entry
->next
)
2226 if (strcmp (sym
->name
, entry
->sym
->name
) == 0)
2228 if (strcmp (gsym_ns
->proc_name
->name
,
2229 sym
->ns
->proc_name
->name
) == 0)
2233 && strcmp (gsym_ns
->proc_name
->name
,
2234 sym
->ns
->parent
->proc_name
->name
) == 0)
2243 /* Check for the requirement of an explicit interface. F08:12.4.2.2. */
2246 gfc_explicit_interface_required (gfc_symbol
*sym
, char *errmsg
, int err_len
)
2248 gfc_formal_arglist
*arg
= gfc_sym_get_dummy_args (sym
);
2250 for ( ; arg
; arg
= arg
->next
)
2255 if (arg
->sym
->attr
.allocatable
) /* (2a) */
2257 strncpy (errmsg
, _("allocatable argument"), err_len
);
2260 else if (arg
->sym
->attr
.asynchronous
)
2262 strncpy (errmsg
, _("asynchronous argument"), err_len
);
2265 else if (arg
->sym
->attr
.optional
)
2267 strncpy (errmsg
, _("optional argument"), err_len
);
2270 else if (arg
->sym
->attr
.pointer
)
2272 strncpy (errmsg
, _("pointer argument"), err_len
);
2275 else if (arg
->sym
->attr
.target
)
2277 strncpy (errmsg
, _("target argument"), err_len
);
2280 else if (arg
->sym
->attr
.value
)
2282 strncpy (errmsg
, _("value argument"), err_len
);
2285 else if (arg
->sym
->attr
.volatile_
)
2287 strncpy (errmsg
, _("volatile argument"), err_len
);
2290 else if (arg
->sym
->as
&& arg
->sym
->as
->type
== AS_ASSUMED_SHAPE
) /* (2b) */
2292 strncpy (errmsg
, _("assumed-shape argument"), err_len
);
2295 else if (arg
->sym
->as
&& arg
->sym
->as
->type
== AS_ASSUMED_RANK
) /* TS 29113, 6.2. */
2297 strncpy (errmsg
, _("assumed-rank argument"), err_len
);
2300 else if (arg
->sym
->attr
.codimension
) /* (2c) */
2302 strncpy (errmsg
, _("coarray argument"), err_len
);
2305 else if (false) /* (2d) TODO: parametrized derived type */
2307 strncpy (errmsg
, _("parametrized derived type argument"), err_len
);
2310 else if (arg
->sym
->ts
.type
== BT_CLASS
) /* (2e) */
2312 strncpy (errmsg
, _("polymorphic argument"), err_len
);
2315 else if (arg
->sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
))
2317 strncpy (errmsg
, _("NO_ARG_CHECK attribute"), err_len
);
2320 else if (arg
->sym
->ts
.type
== BT_ASSUMED
)
2322 /* As assumed-type is unlimited polymorphic (cf. above).
2323 See also TS 29113, Note 6.1. */
2324 strncpy (errmsg
, _("assumed-type argument"), err_len
);
2329 if (sym
->attr
.function
)
2331 gfc_symbol
*res
= sym
->result
? sym
->result
: sym
;
2333 if (res
->attr
.dimension
) /* (3a) */
2335 strncpy (errmsg
, _("array result"), err_len
);
2338 else if (res
->attr
.pointer
|| res
->attr
.allocatable
) /* (3b) */
2340 strncpy (errmsg
, _("pointer or allocatable result"), err_len
);
2343 else if (res
->ts
.type
== BT_CHARACTER
&& res
->ts
.u
.cl
2344 && res
->ts
.u
.cl
->length
2345 && res
->ts
.u
.cl
->length
->expr_type
!= EXPR_CONSTANT
) /* (3c) */
2347 strncpy (errmsg
, _("result with non-constant character length"), err_len
);
2352 if (sym
->attr
.elemental
&& !sym
->attr
.intrinsic
) /* (4) */
2354 strncpy (errmsg
, _("elemental procedure"), err_len
);
2357 else if (sym
->attr
.is_bind_c
) /* (5) */
2359 strncpy (errmsg
, _("bind(c) procedure"), err_len
);
2368 resolve_global_procedure (gfc_symbol
*sym
, locus
*where
,
2369 gfc_actual_arglist
**actual
, int sub
)
2373 enum gfc_symbol_type type
;
2376 type
= sub
? GSYM_SUBROUTINE
: GSYM_FUNCTION
;
2378 gsym
= gfc_get_gsymbol (sym
->binding_label
? sym
->binding_label
: sym
->name
);
2380 if ((gsym
->type
!= GSYM_UNKNOWN
&& gsym
->type
!= type
))
2381 gfc_global_used (gsym
, where
);
2383 if ((sym
->attr
.if_source
== IFSRC_UNKNOWN
2384 || sym
->attr
.if_source
== IFSRC_IFBODY
)
2385 && gsym
->type
!= GSYM_UNKNOWN
2386 && !gsym
->binding_label
2388 && gsym
->ns
->resolved
!= -1
2389 && gsym
->ns
->proc_name
2390 && not_in_recursive (sym
, gsym
->ns
)
2391 && not_entry_self_reference (sym
, gsym
->ns
))
2393 gfc_symbol
*def_sym
;
2395 /* Resolve the gsymbol namespace if needed. */
2396 if (!gsym
->ns
->resolved
)
2398 gfc_dt_list
*old_dt_list
;
2400 /* Stash away derived types so that the backend_decls do not
2402 old_dt_list
= gfc_derived_types
;
2403 gfc_derived_types
= NULL
;
2405 gfc_resolve (gsym
->ns
);
2407 /* Store the new derived types with the global namespace. */
2408 if (gfc_derived_types
)
2409 gsym
->ns
->derived_types
= gfc_derived_types
;
2411 /* Restore the derived types of this namespace. */
2412 gfc_derived_types
= old_dt_list
;
2415 /* Make sure that translation for the gsymbol occurs before
2416 the procedure currently being resolved. */
2417 ns
= gfc_global_ns_list
;
2418 for (; ns
&& ns
!= gsym
->ns
; ns
= ns
->sibling
)
2420 if (ns
->sibling
== gsym
->ns
)
2422 ns
->sibling
= gsym
->ns
->sibling
;
2423 gsym
->ns
->sibling
= gfc_global_ns_list
;
2424 gfc_global_ns_list
= gsym
->ns
;
2429 def_sym
= gsym
->ns
->proc_name
;
2431 /* This can happen if a binding name has been specified. */
2432 if (gsym
->binding_label
&& gsym
->sym_name
!= def_sym
->name
)
2433 gfc_find_symbol (gsym
->sym_name
, gsym
->ns
, 0, &def_sym
);
2435 if (def_sym
->attr
.entry_master
)
2437 gfc_entry_list
*entry
;
2438 for (entry
= gsym
->ns
->entries
; entry
; entry
= entry
->next
)
2439 if (strcmp (entry
->sym
->name
, sym
->name
) == 0)
2441 def_sym
= entry
->sym
;
2446 if (sym
->attr
.function
&& !gfc_compare_types (&sym
->ts
, &def_sym
->ts
))
2448 gfc_error ("Return type mismatch of function %qs at %L (%s/%s)",
2449 sym
->name
, &sym
->declared_at
, gfc_typename (&sym
->ts
),
2450 gfc_typename (&def_sym
->ts
));
2454 if (sym
->attr
.if_source
== IFSRC_UNKNOWN
2455 && gfc_explicit_interface_required (def_sym
, reason
, sizeof(reason
)))
2457 gfc_error ("Explicit interface required for %qs at %L: %s",
2458 sym
->name
, &sym
->declared_at
, reason
);
2462 if (!pedantic
&& (gfc_option
.allow_std
& GFC_STD_GNU
))
2463 /* Turn erros into warnings with -std=gnu and -std=legacy. */
2464 gfc_errors_to_warnings (true);
2466 if (!gfc_compare_interfaces (sym
, def_sym
, sym
->name
, 0, 1,
2467 reason
, sizeof(reason
), NULL
, NULL
))
2469 gfc_error_opt (OPT_Wargument_mismatch
,
2470 "Interface mismatch in global procedure %qs at %L:"
2471 " %s ", sym
->name
, &sym
->declared_at
, reason
);
2476 || ((gfc_option
.warn_std
& GFC_STD_LEGACY
)
2477 && !(gfc_option
.warn_std
& GFC_STD_GNU
)))
2478 gfc_errors_to_warnings (true);
2480 if (sym
->attr
.if_source
!= IFSRC_IFBODY
)
2481 gfc_procedure_use (def_sym
, actual
, where
);
2485 gfc_errors_to_warnings (false);
2487 if (gsym
->type
== GSYM_UNKNOWN
)
2490 gsym
->where
= *where
;
2497 /************* Function resolution *************/
2499 /* Resolve a function call known to be generic.
2500 Section 14.1.2.4.1. */
2503 resolve_generic_f0 (gfc_expr
*expr
, gfc_symbol
*sym
)
2507 if (sym
->attr
.generic
)
2509 s
= gfc_search_interface (sym
->generic
, 0, &expr
->value
.function
.actual
);
2512 expr
->value
.function
.name
= s
->name
;
2513 expr
->value
.function
.esym
= s
;
2515 if (s
->ts
.type
!= BT_UNKNOWN
)
2517 else if (s
->result
!= NULL
&& s
->result
->ts
.type
!= BT_UNKNOWN
)
2518 expr
->ts
= s
->result
->ts
;
2521 expr
->rank
= s
->as
->rank
;
2522 else if (s
->result
!= NULL
&& s
->result
->as
!= NULL
)
2523 expr
->rank
= s
->result
->as
->rank
;
2525 gfc_set_sym_referenced (expr
->value
.function
.esym
);
2530 /* TODO: Need to search for elemental references in generic
2534 if (sym
->attr
.intrinsic
)
2535 return gfc_intrinsic_func_interface (expr
, 0);
2542 resolve_generic_f (gfc_expr
*expr
)
2546 gfc_interface
*intr
= NULL
;
2548 sym
= expr
->symtree
->n
.sym
;
2552 m
= resolve_generic_f0 (expr
, sym
);
2555 else if (m
== MATCH_ERROR
)
2560 for (intr
= sym
->generic
; intr
; intr
= intr
->next
)
2561 if (gfc_fl_struct (intr
->sym
->attr
.flavor
))
2564 if (sym
->ns
->parent
== NULL
)
2566 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
2570 if (!generic_sym (sym
))
2574 /* Last ditch attempt. See if the reference is to an intrinsic
2575 that possesses a matching interface. 14.1.2.4 */
2576 if (sym
&& !intr
&& !gfc_is_intrinsic (sym
, 0, expr
->where
))
2578 if (gfc_init_expr_flag
)
2579 gfc_error ("Function %qs in initialization expression at %L "
2580 "must be an intrinsic function",
2581 expr
->symtree
->n
.sym
->name
, &expr
->where
);
2583 gfc_error ("There is no specific function for the generic %qs "
2584 "at %L", expr
->symtree
->n
.sym
->name
, &expr
->where
);
2590 if (!gfc_convert_to_structure_constructor (expr
, intr
->sym
, NULL
,
2593 return resolve_structure_cons (expr
, 0);
2596 m
= gfc_intrinsic_func_interface (expr
, 0);
2601 gfc_error ("Generic function %qs at %L is not consistent with a "
2602 "specific intrinsic interface", expr
->symtree
->n
.sym
->name
,
2609 /* Resolve a function call known to be specific. */
2612 resolve_specific_f0 (gfc_symbol
*sym
, gfc_expr
*expr
)
2616 if (sym
->attr
.external
|| sym
->attr
.if_source
== IFSRC_IFBODY
)
2618 if (sym
->attr
.dummy
)
2620 sym
->attr
.proc
= PROC_DUMMY
;
2624 sym
->attr
.proc
= PROC_EXTERNAL
;
2628 if (sym
->attr
.proc
== PROC_MODULE
2629 || sym
->attr
.proc
== PROC_ST_FUNCTION
2630 || sym
->attr
.proc
== PROC_INTERNAL
)
2633 if (sym
->attr
.intrinsic
)
2635 m
= gfc_intrinsic_func_interface (expr
, 1);
2639 gfc_error ("Function %qs at %L is INTRINSIC but is not compatible "
2640 "with an intrinsic", sym
->name
, &expr
->where
);
2648 gfc_procedure_use (sym
, &expr
->value
.function
.actual
, &expr
->where
);
2651 expr
->ts
= sym
->result
->ts
;
2654 expr
->value
.function
.name
= sym
->name
;
2655 expr
->value
.function
.esym
= sym
;
2656 /* Prevent crash when sym->ts.u.derived->components is not set due to previous
2658 if (sym
->ts
.type
== BT_CLASS
&& !CLASS_DATA (sym
))
2660 if (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)->as
)
2661 expr
->rank
= CLASS_DATA (sym
)->as
->rank
;
2662 else if (sym
->as
!= NULL
)
2663 expr
->rank
= sym
->as
->rank
;
2670 resolve_specific_f (gfc_expr
*expr
)
2675 sym
= expr
->symtree
->n
.sym
;
2679 m
= resolve_specific_f0 (sym
, expr
);
2682 if (m
== MATCH_ERROR
)
2685 if (sym
->ns
->parent
== NULL
)
2688 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
2694 gfc_error ("Unable to resolve the specific function %qs at %L",
2695 expr
->symtree
->n
.sym
->name
, &expr
->where
);
2701 /* Resolve a procedure call not known to be generic nor specific. */
2704 resolve_unknown_f (gfc_expr
*expr
)
2709 sym
= expr
->symtree
->n
.sym
;
2711 if (sym
->attr
.dummy
)
2713 sym
->attr
.proc
= PROC_DUMMY
;
2714 expr
->value
.function
.name
= sym
->name
;
2718 /* See if we have an intrinsic function reference. */
2720 if (gfc_is_intrinsic (sym
, 0, expr
->where
))
2722 if (gfc_intrinsic_func_interface (expr
, 1) == MATCH_YES
)
2727 /* The reference is to an external name. */
2729 sym
->attr
.proc
= PROC_EXTERNAL
;
2730 expr
->value
.function
.name
= sym
->name
;
2731 expr
->value
.function
.esym
= expr
->symtree
->n
.sym
;
2733 if (sym
->as
!= NULL
)
2734 expr
->rank
= sym
->as
->rank
;
2736 /* Type of the expression is either the type of the symbol or the
2737 default type of the symbol. */
2740 gfc_procedure_use (sym
, &expr
->value
.function
.actual
, &expr
->where
);
2742 if (sym
->ts
.type
!= BT_UNKNOWN
)
2746 ts
= gfc_get_default_type (sym
->name
, sym
->ns
);
2748 if (ts
->type
== BT_UNKNOWN
)
2750 gfc_error ("Function %qs at %L has no IMPLICIT type",
2751 sym
->name
, &expr
->where
);
2762 /* Return true, if the symbol is an external procedure. */
2764 is_external_proc (gfc_symbol
*sym
)
2766 if (!sym
->attr
.dummy
&& !sym
->attr
.contained
2767 && !gfc_is_intrinsic (sym
, sym
->attr
.subroutine
, sym
->declared_at
)
2768 && sym
->attr
.proc
!= PROC_ST_FUNCTION
2769 && !sym
->attr
.proc_pointer
2770 && !sym
->attr
.use_assoc
2778 /* Figure out if a function reference is pure or not. Also set the name
2779 of the function for a potential error message. Return nonzero if the
2780 function is PURE, zero if not. */
2782 pure_stmt_function (gfc_expr
*, gfc_symbol
*);
2785 pure_function (gfc_expr
*e
, const char **name
)
2788 gfc_component
*comp
;
2792 if (e
->symtree
!= NULL
2793 && e
->symtree
->n
.sym
!= NULL
2794 && e
->symtree
->n
.sym
->attr
.proc
== PROC_ST_FUNCTION
)
2795 return pure_stmt_function (e
, e
->symtree
->n
.sym
);
2797 comp
= gfc_get_proc_ptr_comp (e
);
2800 pure
= gfc_pure (comp
->ts
.interface
);
2803 else if (e
->value
.function
.esym
)
2805 pure
= gfc_pure (e
->value
.function
.esym
);
2806 *name
= e
->value
.function
.esym
->name
;
2808 else if (e
->value
.function
.isym
)
2810 pure
= e
->value
.function
.isym
->pure
2811 || e
->value
.function
.isym
->elemental
;
2812 *name
= e
->value
.function
.isym
->name
;
2816 /* Implicit functions are not pure. */
2818 *name
= e
->value
.function
.name
;
2826 impure_stmt_fcn (gfc_expr
*e
, gfc_symbol
*sym
,
2827 int *f ATTRIBUTE_UNUSED
)
2831 /* Don't bother recursing into other statement functions
2832 since they will be checked individually for purity. */
2833 if (e
->expr_type
!= EXPR_FUNCTION
2835 || e
->symtree
->n
.sym
== sym
2836 || e
->symtree
->n
.sym
->attr
.proc
== PROC_ST_FUNCTION
)
2839 return pure_function (e
, &name
) ? false : true;
2844 pure_stmt_function (gfc_expr
*e
, gfc_symbol
*sym
)
2846 return gfc_traverse_expr (e
, sym
, impure_stmt_fcn
, 0) ? 0 : 1;
2850 /* Check if an impure function is allowed in the current context. */
2852 static bool check_pure_function (gfc_expr
*e
)
2854 const char *name
= NULL
;
2855 if (!pure_function (e
, &name
) && name
)
2859 gfc_error ("Reference to impure function %qs at %L inside a "
2860 "FORALL %s", name
, &e
->where
,
2861 forall_flag
== 2 ? "mask" : "block");
2864 else if (gfc_do_concurrent_flag
)
2866 gfc_error ("Reference to impure function %qs at %L inside a "
2867 "DO CONCURRENT %s", name
, &e
->where
,
2868 gfc_do_concurrent_flag
== 2 ? "mask" : "block");
2871 else if (gfc_pure (NULL
))
2873 gfc_error ("Reference to impure function %qs at %L "
2874 "within a PURE procedure", name
, &e
->where
);
2877 gfc_unset_implicit_pure (NULL
);
2883 /* Update current procedure's array_outer_dependency flag, considering
2884 a call to procedure SYM. */
2887 update_current_proc_array_outer_dependency (gfc_symbol
*sym
)
2889 /* Check to see if this is a sibling function that has not yet
2891 gfc_namespace
*sibling
= gfc_current_ns
->sibling
;
2892 for (; sibling
; sibling
= sibling
->sibling
)
2894 if (sibling
->proc_name
== sym
)
2896 gfc_resolve (sibling
);
2901 /* If SYM has references to outer arrays, so has the procedure calling
2902 SYM. If SYM is a procedure pointer, we can assume the worst. */
2903 if (sym
->attr
.array_outer_dependency
2904 || sym
->attr
.proc_pointer
)
2905 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
2909 /* Resolve a function call, which means resolving the arguments, then figuring
2910 out which entity the name refers to. */
2913 resolve_function (gfc_expr
*expr
)
2915 gfc_actual_arglist
*arg
;
2919 procedure_type p
= PROC_INTRINSIC
;
2920 bool no_formal_args
;
2924 sym
= expr
->symtree
->n
.sym
;
2926 /* If this is a procedure pointer component, it has already been resolved. */
2927 if (gfc_is_proc_ptr_comp (expr
))
2930 /* Avoid re-resolving the arguments of caf_get, which can lead to inserting
2932 if (sym
&& sym
->attr
.intrinsic
2933 && (sym
->intmod_sym_id
== GFC_ISYM_CAF_GET
2934 || sym
->intmod_sym_id
== GFC_ISYM_CAF_SEND
))
2937 if (sym
&& sym
->attr
.intrinsic
2938 && !gfc_resolve_intrinsic (sym
, &expr
->where
))
2941 if (sym
&& (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.subroutine
))
2943 gfc_error ("%qs at %L is not a function", sym
->name
, &expr
->where
);
2947 /* If this ia a deferred TBP with an abstract interface (which may
2948 of course be referenced), expr->value.function.esym will be set. */
2949 if (sym
&& sym
->attr
.abstract
&& !expr
->value
.function
.esym
)
2951 gfc_error ("ABSTRACT INTERFACE %qs must not be referenced at %L",
2952 sym
->name
, &expr
->where
);
2956 /* Switch off assumed size checking and do this again for certain kinds
2957 of procedure, once the procedure itself is resolved. */
2958 need_full_assumed_size
++;
2960 if (expr
->symtree
&& expr
->symtree
->n
.sym
)
2961 p
= expr
->symtree
->n
.sym
->attr
.proc
;
2963 if (expr
->value
.function
.isym
&& expr
->value
.function
.isym
->inquiry
)
2964 inquiry_argument
= true;
2965 no_formal_args
= sym
&& is_external_proc (sym
)
2966 && gfc_sym_get_dummy_args (sym
) == NULL
;
2968 if (!resolve_actual_arglist (expr
->value
.function
.actual
,
2971 inquiry_argument
= false;
2975 inquiry_argument
= false;
2977 /* Resume assumed_size checking. */
2978 need_full_assumed_size
--;
2980 /* If the procedure is external, check for usage. */
2981 if (sym
&& is_external_proc (sym
))
2982 resolve_global_procedure (sym
, &expr
->where
,
2983 &expr
->value
.function
.actual
, 0);
2985 if (sym
&& sym
->ts
.type
== BT_CHARACTER
2987 && sym
->ts
.u
.cl
->length
== NULL
2989 && !sym
->ts
.deferred
2990 && expr
->value
.function
.esym
== NULL
2991 && !sym
->attr
.contained
)
2993 /* Internal procedures are taken care of in resolve_contained_fntype. */
2994 gfc_error ("Function %qs is declared CHARACTER(*) and cannot "
2995 "be used at %L since it is not a dummy argument",
2996 sym
->name
, &expr
->where
);
3000 /* See if function is already resolved. */
3002 if (expr
->value
.function
.name
!= NULL
3003 || expr
->value
.function
.isym
!= NULL
)
3005 if (expr
->ts
.type
== BT_UNKNOWN
)
3011 /* Apply the rules of section 14.1.2. */
3013 switch (procedure_kind (sym
))
3016 t
= resolve_generic_f (expr
);
3019 case PTYPE_SPECIFIC
:
3020 t
= resolve_specific_f (expr
);
3024 t
= resolve_unknown_f (expr
);
3028 gfc_internal_error ("resolve_function(): bad function type");
3032 /* If the expression is still a function (it might have simplified),
3033 then we check to see if we are calling an elemental function. */
3035 if (expr
->expr_type
!= EXPR_FUNCTION
)
3038 temp
= need_full_assumed_size
;
3039 need_full_assumed_size
= 0;
3041 if (!resolve_elemental_actual (expr
, NULL
))
3044 if (omp_workshare_flag
3045 && expr
->value
.function
.esym
3046 && ! gfc_elemental (expr
->value
.function
.esym
))
3048 gfc_error ("User defined non-ELEMENTAL function %qs at %L not allowed "
3049 "in WORKSHARE construct", expr
->value
.function
.esym
->name
,
3054 #define GENERIC_ID expr->value.function.isym->id
3055 else if (expr
->value
.function
.actual
!= NULL
3056 && expr
->value
.function
.isym
!= NULL
3057 && GENERIC_ID
!= GFC_ISYM_LBOUND
3058 && GENERIC_ID
!= GFC_ISYM_LCOBOUND
3059 && GENERIC_ID
!= GFC_ISYM_UCOBOUND
3060 && GENERIC_ID
!= GFC_ISYM_LEN
3061 && GENERIC_ID
!= GFC_ISYM_LOC
3062 && GENERIC_ID
!= GFC_ISYM_C_LOC
3063 && GENERIC_ID
!= GFC_ISYM_PRESENT
)
3065 /* Array intrinsics must also have the last upper bound of an
3066 assumed size array argument. UBOUND and SIZE have to be
3067 excluded from the check if the second argument is anything
3070 for (arg
= expr
->value
.function
.actual
; arg
; arg
= arg
->next
)
3072 if ((GENERIC_ID
== GFC_ISYM_UBOUND
|| GENERIC_ID
== GFC_ISYM_SIZE
)
3073 && arg
== expr
->value
.function
.actual
3074 && arg
->next
!= NULL
&& arg
->next
->expr
)
3076 if (arg
->next
->expr
->expr_type
!= EXPR_CONSTANT
)
3079 if (arg
->next
->name
&& strncmp (arg
->next
->name
, "kind", 4) == 0)
3082 if ((int)mpz_get_si (arg
->next
->expr
->value
.integer
)
3087 if (arg
->expr
!= NULL
3088 && arg
->expr
->rank
> 0
3089 && resolve_assumed_size_actual (arg
->expr
))
3095 need_full_assumed_size
= temp
;
3097 if (!check_pure_function(expr
))
3100 /* Functions without the RECURSIVE attribution are not allowed to
3101 * call themselves. */
3102 if (expr
->value
.function
.esym
&& !expr
->value
.function
.esym
->attr
.recursive
)
3105 esym
= expr
->value
.function
.esym
;
3107 if (is_illegal_recursion (esym
, gfc_current_ns
))
3109 if (esym
->attr
.entry
&& esym
->ns
->entries
)
3110 gfc_error ("ENTRY %qs at %L cannot be called recursively, as"
3111 " function %qs is not RECURSIVE",
3112 esym
->name
, &expr
->where
, esym
->ns
->entries
->sym
->name
);
3114 gfc_error ("Function %qs at %L cannot be called recursively, as it"
3115 " is not RECURSIVE", esym
->name
, &expr
->where
);
3121 /* Character lengths of use associated functions may contains references to
3122 symbols not referenced from the current program unit otherwise. Make sure
3123 those symbols are marked as referenced. */
3125 if (expr
->ts
.type
== BT_CHARACTER
&& expr
->value
.function
.esym
3126 && expr
->value
.function
.esym
->attr
.use_assoc
)
3128 gfc_expr_set_symbols_referenced (expr
->ts
.u
.cl
->length
);
3131 /* Make sure that the expression has a typespec that works. */
3132 if (expr
->ts
.type
== BT_UNKNOWN
)
3134 if (expr
->symtree
->n
.sym
->result
3135 && expr
->symtree
->n
.sym
->result
->ts
.type
!= BT_UNKNOWN
3136 && !expr
->symtree
->n
.sym
->result
->attr
.proc_pointer
)
3137 expr
->ts
= expr
->symtree
->n
.sym
->result
->ts
;
3140 if (!expr
->ref
&& !expr
->value
.function
.isym
)
3142 if (expr
->value
.function
.esym
)
3143 update_current_proc_array_outer_dependency (expr
->value
.function
.esym
);
3145 update_current_proc_array_outer_dependency (sym
);
3148 /* typebound procedure: Assume the worst. */
3149 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
3155 /************* Subroutine resolution *************/
3158 pure_subroutine (gfc_symbol
*sym
, const char *name
, locus
*loc
)
3165 gfc_error ("Subroutine call to %qs in FORALL block at %L is not PURE",
3169 else if (gfc_do_concurrent_flag
)
3171 gfc_error ("Subroutine call to %qs in DO CONCURRENT block at %L is not "
3175 else if (gfc_pure (NULL
))
3177 gfc_error ("Subroutine call to %qs at %L is not PURE", name
, loc
);
3181 gfc_unset_implicit_pure (NULL
);
3187 resolve_generic_s0 (gfc_code
*c
, gfc_symbol
*sym
)
3191 if (sym
->attr
.generic
)
3193 s
= gfc_search_interface (sym
->generic
, 1, &c
->ext
.actual
);
3196 c
->resolved_sym
= s
;
3197 if (!pure_subroutine (s
, s
->name
, &c
->loc
))
3202 /* TODO: Need to search for elemental references in generic interface. */
3205 if (sym
->attr
.intrinsic
)
3206 return gfc_intrinsic_sub_interface (c
, 0);
3213 resolve_generic_s (gfc_code
*c
)
3218 sym
= c
->symtree
->n
.sym
;
3222 m
= resolve_generic_s0 (c
, sym
);
3225 else if (m
== MATCH_ERROR
)
3229 if (sym
->ns
->parent
== NULL
)
3231 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
3235 if (!generic_sym (sym
))
3239 /* Last ditch attempt. See if the reference is to an intrinsic
3240 that possesses a matching interface. 14.1.2.4 */
3241 sym
= c
->symtree
->n
.sym
;
3243 if (!gfc_is_intrinsic (sym
, 1, c
->loc
))
3245 gfc_error ("There is no specific subroutine for the generic %qs at %L",
3246 sym
->name
, &c
->loc
);
3250 m
= gfc_intrinsic_sub_interface (c
, 0);
3254 gfc_error ("Generic subroutine %qs at %L is not consistent with an "
3255 "intrinsic subroutine interface", sym
->name
, &c
->loc
);
3261 /* Resolve a subroutine call known to be specific. */
3264 resolve_specific_s0 (gfc_code
*c
, gfc_symbol
*sym
)
3268 if (sym
->attr
.external
|| sym
->attr
.if_source
== IFSRC_IFBODY
)
3270 if (sym
->attr
.dummy
)
3272 sym
->attr
.proc
= PROC_DUMMY
;
3276 sym
->attr
.proc
= PROC_EXTERNAL
;
3280 if (sym
->attr
.proc
== PROC_MODULE
|| sym
->attr
.proc
== PROC_INTERNAL
)
3283 if (sym
->attr
.intrinsic
)
3285 m
= gfc_intrinsic_sub_interface (c
, 1);
3289 gfc_error ("Subroutine %qs at %L is INTRINSIC but is not compatible "
3290 "with an intrinsic", sym
->name
, &c
->loc
);
3298 gfc_procedure_use (sym
, &c
->ext
.actual
, &c
->loc
);
3300 c
->resolved_sym
= sym
;
3301 if (!pure_subroutine (sym
, sym
->name
, &c
->loc
))
3309 resolve_specific_s (gfc_code
*c
)
3314 sym
= c
->symtree
->n
.sym
;
3318 m
= resolve_specific_s0 (c
, sym
);
3321 if (m
== MATCH_ERROR
)
3324 if (sym
->ns
->parent
== NULL
)
3327 gfc_find_symbol (sym
->name
, sym
->ns
->parent
, 1, &sym
);
3333 sym
= c
->symtree
->n
.sym
;
3334 gfc_error ("Unable to resolve the specific subroutine %qs at %L",
3335 sym
->name
, &c
->loc
);
3341 /* Resolve a subroutine call not known to be generic nor specific. */
3344 resolve_unknown_s (gfc_code
*c
)
3348 sym
= c
->symtree
->n
.sym
;
3350 if (sym
->attr
.dummy
)
3352 sym
->attr
.proc
= PROC_DUMMY
;
3356 /* See if we have an intrinsic function reference. */
3358 if (gfc_is_intrinsic (sym
, 1, c
->loc
))
3360 if (gfc_intrinsic_sub_interface (c
, 1) == MATCH_YES
)
3365 /* The reference is to an external name. */
3368 gfc_procedure_use (sym
, &c
->ext
.actual
, &c
->loc
);
3370 c
->resolved_sym
= sym
;
3372 return pure_subroutine (sym
, sym
->name
, &c
->loc
);
3376 /* Resolve a subroutine call. Although it was tempting to use the same code
3377 for functions, subroutines and functions are stored differently and this
3378 makes things awkward. */
3381 resolve_call (gfc_code
*c
)
3384 procedure_type ptype
= PROC_INTRINSIC
;
3385 gfc_symbol
*csym
, *sym
;
3386 bool no_formal_args
;
3388 csym
= c
->symtree
? c
->symtree
->n
.sym
: NULL
;
3390 if (csym
&& csym
->ts
.type
!= BT_UNKNOWN
)
3392 gfc_error ("%qs at %L has a type, which is not consistent with "
3393 "the CALL at %L", csym
->name
, &csym
->declared_at
, &c
->loc
);
3397 if (csym
&& gfc_current_ns
->parent
&& csym
->ns
!= gfc_current_ns
)
3400 gfc_find_sym_tree (c
->symtree
->name
, gfc_current_ns
, 1, &st
);
3401 sym
= st
? st
->n
.sym
: NULL
;
3402 if (sym
&& csym
!= sym
3403 && sym
->ns
== gfc_current_ns
3404 && sym
->attr
.flavor
== FL_PROCEDURE
3405 && sym
->attr
.contained
)
3408 if (csym
->attr
.generic
)
3409 c
->symtree
->n
.sym
= sym
;
3412 csym
= c
->symtree
->n
.sym
;
3416 /* If this ia a deferred TBP, c->expr1 will be set. */
3417 if (!c
->expr1
&& csym
)
3419 if (csym
->attr
.abstract
)
3421 gfc_error ("ABSTRACT INTERFACE %qs must not be referenced at %L",
3422 csym
->name
, &c
->loc
);
3426 /* Subroutines without the RECURSIVE attribution are not allowed to
3428 if (is_illegal_recursion (csym
, gfc_current_ns
))
3430 if (csym
->attr
.entry
&& csym
->ns
->entries
)
3431 gfc_error ("ENTRY %qs at %L cannot be called recursively, "
3432 "as subroutine %qs is not RECURSIVE",
3433 csym
->name
, &c
->loc
, csym
->ns
->entries
->sym
->name
);
3435 gfc_error ("SUBROUTINE %qs at %L cannot be called recursively, "
3436 "as it is not RECURSIVE", csym
->name
, &c
->loc
);
3442 /* Switch off assumed size checking and do this again for certain kinds
3443 of procedure, once the procedure itself is resolved. */
3444 need_full_assumed_size
++;
3447 ptype
= csym
->attr
.proc
;
3449 no_formal_args
= csym
&& is_external_proc (csym
)
3450 && gfc_sym_get_dummy_args (csym
) == NULL
;
3451 if (!resolve_actual_arglist (c
->ext
.actual
, ptype
, no_formal_args
))
3454 /* Resume assumed_size checking. */
3455 need_full_assumed_size
--;
3457 /* If external, check for usage. */
3458 if (csym
&& is_external_proc (csym
))
3459 resolve_global_procedure (csym
, &c
->loc
, &c
->ext
.actual
, 1);
3462 if (c
->resolved_sym
== NULL
)
3464 c
->resolved_isym
= NULL
;
3465 switch (procedure_kind (csym
))
3468 t
= resolve_generic_s (c
);
3471 case PTYPE_SPECIFIC
:
3472 t
= resolve_specific_s (c
);
3476 t
= resolve_unknown_s (c
);
3480 gfc_internal_error ("resolve_subroutine(): bad function type");
3484 /* Some checks of elemental subroutine actual arguments. */
3485 if (!resolve_elemental_actual (NULL
, c
))
3489 update_current_proc_array_outer_dependency (csym
);
3491 /* Typebound procedure: Assume the worst. */
3492 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
3498 /* Compare the shapes of two arrays that have non-NULL shapes. If both
3499 op1->shape and op2->shape are non-NULL return true if their shapes
3500 match. If both op1->shape and op2->shape are non-NULL return false
3501 if their shapes do not match. If either op1->shape or op2->shape is
3502 NULL, return true. */
3505 compare_shapes (gfc_expr
*op1
, gfc_expr
*op2
)
3512 if (op1
->shape
!= NULL
&& op2
->shape
!= NULL
)
3514 for (i
= 0; i
< op1
->rank
; i
++)
3516 if (mpz_cmp (op1
->shape
[i
], op2
->shape
[i
]) != 0)
3518 gfc_error ("Shapes for operands at %L and %L are not conformable",
3519 &op1
->where
, &op2
->where
);
3529 /* Convert a logical operator to the corresponding bitwise intrinsic call.
3530 For example A .AND. B becomes IAND(A, B). */
3532 logical_to_bitwise (gfc_expr
*e
)
3534 gfc_expr
*tmp
, *op1
, *op2
;
3536 gfc_actual_arglist
*args
= NULL
;
3538 gcc_assert (e
->expr_type
== EXPR_OP
);
3540 isym
= GFC_ISYM_NONE
;
3541 op1
= e
->value
.op
.op1
;
3542 op2
= e
->value
.op
.op2
;
3544 switch (e
->value
.op
.op
)
3547 isym
= GFC_ISYM_NOT
;
3550 isym
= GFC_ISYM_IAND
;
3553 isym
= GFC_ISYM_IOR
;
3555 case INTRINSIC_NEQV
:
3556 isym
= GFC_ISYM_IEOR
;
3559 /* "Bitwise eqv" is just the complement of NEQV === IEOR.
3560 Change the old expression to NEQV, which will get replaced by IEOR,
3561 and wrap it in NOT. */
3562 tmp
= gfc_copy_expr (e
);
3563 tmp
->value
.op
.op
= INTRINSIC_NEQV
;
3564 tmp
= logical_to_bitwise (tmp
);
3565 isym
= GFC_ISYM_NOT
;
3570 gfc_internal_error ("logical_to_bitwise(): Bad intrinsic");
3573 /* Inherit the original operation's operands as arguments. */
3574 args
= gfc_get_actual_arglist ();
3578 args
->next
= gfc_get_actual_arglist ();
3579 args
->next
->expr
= op2
;
3582 /* Convert the expression to a function call. */
3583 e
->expr_type
= EXPR_FUNCTION
;
3584 e
->value
.function
.actual
= args
;
3585 e
->value
.function
.isym
= gfc_intrinsic_function_by_id (isym
);
3586 e
->value
.function
.name
= e
->value
.function
.isym
->name
;
3587 e
->value
.function
.esym
= NULL
;
3589 /* Make up a pre-resolved function call symtree if we need to. */
3590 if (!e
->symtree
|| !e
->symtree
->n
.sym
)
3593 gfc_get_ha_sym_tree (e
->value
.function
.isym
->name
, &e
->symtree
);
3594 sym
= e
->symtree
->n
.sym
;
3596 sym
->attr
.flavor
= FL_PROCEDURE
;
3597 sym
->attr
.function
= 1;
3598 sym
->attr
.elemental
= 1;
3600 sym
->attr
.referenced
= 1;
3601 gfc_intrinsic_symbol (sym
);
3602 gfc_commit_symbol (sym
);
3605 args
->name
= e
->value
.function
.isym
->formal
->name
;
3606 if (e
->value
.function
.isym
->formal
->next
)
3607 args
->next
->name
= e
->value
.function
.isym
->formal
->next
->name
;
3612 /* Resolve an operator expression node. This can involve replacing the
3613 operation with a user defined function call. */
3616 resolve_operator (gfc_expr
*e
)
3618 gfc_expr
*op1
, *op2
;
3620 bool dual_locus_error
;
3623 /* Resolve all subnodes-- give them types. */
3625 switch (e
->value
.op
.op
)
3628 if (!gfc_resolve_expr (e
->value
.op
.op2
))
3634 case INTRINSIC_UPLUS
:
3635 case INTRINSIC_UMINUS
:
3636 case INTRINSIC_PARENTHESES
:
3637 if (!gfc_resolve_expr (e
->value
.op
.op1
))
3642 /* Typecheck the new node. */
3644 op1
= e
->value
.op
.op1
;
3645 op2
= e
->value
.op
.op2
;
3646 dual_locus_error
= false;
3648 if ((op1
&& op1
->expr_type
== EXPR_NULL
)
3649 || (op2
&& op2
->expr_type
== EXPR_NULL
))
3651 sprintf (msg
, _("Invalid context for NULL() pointer at %%L"));
3655 switch (e
->value
.op
.op
)
3657 case INTRINSIC_UPLUS
:
3658 case INTRINSIC_UMINUS
:
3659 if (op1
->ts
.type
== BT_INTEGER
3660 || op1
->ts
.type
== BT_REAL
3661 || op1
->ts
.type
== BT_COMPLEX
)
3667 sprintf (msg
, _("Operand of unary numeric operator %%<%s%%> at %%L is %s"),
3668 gfc_op2string (e
->value
.op
.op
), gfc_typename (&e
->ts
));
3671 case INTRINSIC_PLUS
:
3672 case INTRINSIC_MINUS
:
3673 case INTRINSIC_TIMES
:
3674 case INTRINSIC_DIVIDE
:
3675 case INTRINSIC_POWER
:
3676 if (gfc_numeric_ts (&op1
->ts
) && gfc_numeric_ts (&op2
->ts
))
3678 gfc_type_convert_binary (e
, 1);
3683 _("Operands of binary numeric operator %%<%s%%> at %%L are %s/%s"),
3684 gfc_op2string (e
->value
.op
.op
), gfc_typename (&op1
->ts
),
3685 gfc_typename (&op2
->ts
));
3688 case INTRINSIC_CONCAT
:
3689 if (op1
->ts
.type
== BT_CHARACTER
&& op2
->ts
.type
== BT_CHARACTER
3690 && op1
->ts
.kind
== op2
->ts
.kind
)
3692 e
->ts
.type
= BT_CHARACTER
;
3693 e
->ts
.kind
= op1
->ts
.kind
;
3698 _("Operands of string concatenation operator at %%L are %s/%s"),
3699 gfc_typename (&op1
->ts
), gfc_typename (&op2
->ts
));
3705 case INTRINSIC_NEQV
:
3706 if (op1
->ts
.type
== BT_LOGICAL
&& op2
->ts
.type
== BT_LOGICAL
)
3708 e
->ts
.type
= BT_LOGICAL
;
3709 e
->ts
.kind
= gfc_kind_max (op1
, op2
);
3710 if (op1
->ts
.kind
< e
->ts
.kind
)
3711 gfc_convert_type (op1
, &e
->ts
, 2);
3712 else if (op2
->ts
.kind
< e
->ts
.kind
)
3713 gfc_convert_type (op2
, &e
->ts
, 2);
3717 /* Logical ops on integers become bitwise ops with -fdec. */
3719 && (op1
->ts
.type
== BT_INTEGER
|| op2
->ts
.type
== BT_INTEGER
))
3721 e
->ts
.type
= BT_INTEGER
;
3722 e
->ts
.kind
= gfc_kind_max (op1
, op2
);
3723 if (op1
->ts
.type
!= e
->ts
.type
|| op1
->ts
.kind
!= e
->ts
.kind
)
3724 gfc_convert_type (op1
, &e
->ts
, 1);
3725 if (op2
->ts
.type
!= e
->ts
.type
|| op2
->ts
.kind
!= e
->ts
.kind
)
3726 gfc_convert_type (op2
, &e
->ts
, 1);
3727 e
= logical_to_bitwise (e
);
3728 return resolve_function (e
);
3731 sprintf (msg
, _("Operands of logical operator %%<%s%%> at %%L are %s/%s"),
3732 gfc_op2string (e
->value
.op
.op
), gfc_typename (&op1
->ts
),
3733 gfc_typename (&op2
->ts
));
3738 /* Logical ops on integers become bitwise ops with -fdec. */
3739 if (flag_dec
&& op1
->ts
.type
== BT_INTEGER
)
3741 e
->ts
.type
= BT_INTEGER
;
3742 e
->ts
.kind
= op1
->ts
.kind
;
3743 e
= logical_to_bitwise (e
);
3744 return resolve_function (e
);
3747 if (op1
->ts
.type
== BT_LOGICAL
)
3749 e
->ts
.type
= BT_LOGICAL
;
3750 e
->ts
.kind
= op1
->ts
.kind
;
3754 sprintf (msg
, _("Operand of .not. operator at %%L is %s"),
3755 gfc_typename (&op1
->ts
));
3759 case INTRINSIC_GT_OS
:
3761 case INTRINSIC_GE_OS
:
3763 case INTRINSIC_LT_OS
:
3765 case INTRINSIC_LE_OS
:
3766 if (op1
->ts
.type
== BT_COMPLEX
|| op2
->ts
.type
== BT_COMPLEX
)
3768 strcpy (msg
, _("COMPLEX quantities cannot be compared at %L"));
3775 case INTRINSIC_EQ_OS
:
3777 case INTRINSIC_NE_OS
:
3778 if (op1
->ts
.type
== BT_CHARACTER
&& op2
->ts
.type
== BT_CHARACTER
3779 && op1
->ts
.kind
== op2
->ts
.kind
)
3781 e
->ts
.type
= BT_LOGICAL
;
3782 e
->ts
.kind
= gfc_default_logical_kind
;
3786 if (gfc_numeric_ts (&op1
->ts
) && gfc_numeric_ts (&op2
->ts
))
3788 gfc_type_convert_binary (e
, 1);
3790 e
->ts
.type
= BT_LOGICAL
;
3791 e
->ts
.kind
= gfc_default_logical_kind
;
3793 if (warn_compare_reals
)
3795 gfc_intrinsic_op op
= e
->value
.op
.op
;
3797 /* Type conversion has made sure that the types of op1 and op2
3798 agree, so it is only necessary to check the first one. */
3799 if ((op1
->ts
.type
== BT_REAL
|| op1
->ts
.type
== BT_COMPLEX
)
3800 && (op
== INTRINSIC_EQ
|| op
== INTRINSIC_EQ_OS
3801 || op
== INTRINSIC_NE
|| op
== INTRINSIC_NE_OS
))
3805 if (op
== INTRINSIC_EQ
|| op
== INTRINSIC_EQ_OS
)
3806 msg
= "Equality comparison for %s at %L";
3808 msg
= "Inequality comparison for %s at %L";
3810 gfc_warning (OPT_Wcompare_reals
, msg
,
3811 gfc_typename (&op1
->ts
), &op1
->where
);
3818 if (op1
->ts
.type
== BT_LOGICAL
&& op2
->ts
.type
== BT_LOGICAL
)
3820 _("Logicals at %%L must be compared with %s instead of %s"),
3821 (e
->value
.op
.op
== INTRINSIC_EQ
3822 || e
->value
.op
.op
== INTRINSIC_EQ_OS
)
3823 ? ".eqv." : ".neqv.", gfc_op2string (e
->value
.op
.op
));
3826 _("Operands of comparison operator %%<%s%%> at %%L are %s/%s"),
3827 gfc_op2string (e
->value
.op
.op
), gfc_typename (&op1
->ts
),
3828 gfc_typename (&op2
->ts
));
3832 case INTRINSIC_USER
:
3833 if (e
->value
.op
.uop
->op
== NULL
)
3834 sprintf (msg
, _("Unknown operator %%<%s%%> at %%L"),
3835 e
->value
.op
.uop
->name
);
3836 else if (op2
== NULL
)
3837 sprintf (msg
, _("Operand of user operator %%<%s%%> at %%L is %s"),
3838 e
->value
.op
.uop
->name
, gfc_typename (&op1
->ts
));
3841 sprintf (msg
, _("Operands of user operator %%<%s%%> at %%L are %s/%s"),
3842 e
->value
.op
.uop
->name
, gfc_typename (&op1
->ts
),
3843 gfc_typename (&op2
->ts
));
3844 e
->value
.op
.uop
->op
->sym
->attr
.referenced
= 1;
3849 case INTRINSIC_PARENTHESES
:
3851 if (e
->ts
.type
== BT_CHARACTER
)
3852 e
->ts
.u
.cl
= op1
->ts
.u
.cl
;
3856 gfc_internal_error ("resolve_operator(): Bad intrinsic");
3859 /* Deal with arrayness of an operand through an operator. */
3863 switch (e
->value
.op
.op
)
3865 case INTRINSIC_PLUS
:
3866 case INTRINSIC_MINUS
:
3867 case INTRINSIC_TIMES
:
3868 case INTRINSIC_DIVIDE
:
3869 case INTRINSIC_POWER
:
3870 case INTRINSIC_CONCAT
:
3874 case INTRINSIC_NEQV
:
3876 case INTRINSIC_EQ_OS
:
3878 case INTRINSIC_NE_OS
:
3880 case INTRINSIC_GT_OS
:
3882 case INTRINSIC_GE_OS
:
3884 case INTRINSIC_LT_OS
:
3886 case INTRINSIC_LE_OS
:
3888 if (op1
->rank
== 0 && op2
->rank
== 0)
3891 if (op1
->rank
== 0 && op2
->rank
!= 0)
3893 e
->rank
= op2
->rank
;
3895 if (e
->shape
== NULL
)
3896 e
->shape
= gfc_copy_shape (op2
->shape
, op2
->rank
);
3899 if (op1
->rank
!= 0 && op2
->rank
== 0)
3901 e
->rank
= op1
->rank
;
3903 if (e
->shape
== NULL
)
3904 e
->shape
= gfc_copy_shape (op1
->shape
, op1
->rank
);
3907 if (op1
->rank
!= 0 && op2
->rank
!= 0)
3909 if (op1
->rank
== op2
->rank
)
3911 e
->rank
= op1
->rank
;
3912 if (e
->shape
== NULL
)
3914 t
= compare_shapes (op1
, op2
);
3918 e
->shape
= gfc_copy_shape (op1
->shape
, op1
->rank
);
3923 /* Allow higher level expressions to work. */
3926 /* Try user-defined operators, and otherwise throw an error. */
3927 dual_locus_error
= true;
3929 _("Inconsistent ranks for operator at %%L and %%L"));
3936 case INTRINSIC_PARENTHESES
:
3938 case INTRINSIC_UPLUS
:
3939 case INTRINSIC_UMINUS
:
3940 /* Simply copy arrayness attribute */
3941 e
->rank
= op1
->rank
;
3943 if (e
->shape
== NULL
)
3944 e
->shape
= gfc_copy_shape (op1
->shape
, op1
->rank
);
3952 /* Attempt to simplify the expression. */
3955 t
= gfc_simplify_expr (e
, 0);
3956 /* Some calls do not succeed in simplification and return false
3957 even though there is no error; e.g. variable references to
3958 PARAMETER arrays. */
3959 if (!gfc_is_constant_expr (e
))
3967 match m
= gfc_extend_expr (e
);
3970 if (m
== MATCH_ERROR
)
3974 if (dual_locus_error
)
3975 gfc_error (msg
, &op1
->where
, &op2
->where
);
3977 gfc_error (msg
, &e
->where
);
3983 /************** Array resolution subroutines **************/
3986 { CMP_LT
, CMP_EQ
, CMP_GT
, CMP_UNKNOWN
};
3988 /* Compare two integer expressions. */
3990 static compare_result
3991 compare_bound (gfc_expr
*a
, gfc_expr
*b
)
3995 if (a
== NULL
|| a
->expr_type
!= EXPR_CONSTANT
3996 || b
== NULL
|| b
->expr_type
!= EXPR_CONSTANT
)
3999 /* If either of the types isn't INTEGER, we must have
4000 raised an error earlier. */
4002 if (a
->ts
.type
!= BT_INTEGER
|| b
->ts
.type
!= BT_INTEGER
)
4005 i
= mpz_cmp (a
->value
.integer
, b
->value
.integer
);
4015 /* Compare an integer expression with an integer. */
4017 static compare_result
4018 compare_bound_int (gfc_expr
*a
, int b
)
4022 if (a
== NULL
|| a
->expr_type
!= EXPR_CONSTANT
)
4025 if (a
->ts
.type
!= BT_INTEGER
)
4026 gfc_internal_error ("compare_bound_int(): Bad expression");
4028 i
= mpz_cmp_si (a
->value
.integer
, b
);
4038 /* Compare an integer expression with a mpz_t. */
4040 static compare_result
4041 compare_bound_mpz_t (gfc_expr
*a
, mpz_t b
)
4045 if (a
== NULL
|| a
->expr_type
!= EXPR_CONSTANT
)
4048 if (a
->ts
.type
!= BT_INTEGER
)
4049 gfc_internal_error ("compare_bound_int(): Bad expression");
4051 i
= mpz_cmp (a
->value
.integer
, b
);
4061 /* Compute the last value of a sequence given by a triplet.
4062 Return 0 if it wasn't able to compute the last value, or if the
4063 sequence if empty, and 1 otherwise. */
4066 compute_last_value_for_triplet (gfc_expr
*start
, gfc_expr
*end
,
4067 gfc_expr
*stride
, mpz_t last
)
4071 if (start
== NULL
|| start
->expr_type
!= EXPR_CONSTANT
4072 || end
== NULL
|| end
->expr_type
!= EXPR_CONSTANT
4073 || (stride
!= NULL
&& stride
->expr_type
!= EXPR_CONSTANT
))
4076 if (start
->ts
.type
!= BT_INTEGER
|| end
->ts
.type
!= BT_INTEGER
4077 || (stride
!= NULL
&& stride
->ts
.type
!= BT_INTEGER
))
4080 if (stride
== NULL
|| compare_bound_int (stride
, 1) == CMP_EQ
)
4082 if (compare_bound (start
, end
) == CMP_GT
)
4084 mpz_set (last
, end
->value
.integer
);
4088 if (compare_bound_int (stride
, 0) == CMP_GT
)
4090 /* Stride is positive */
4091 if (mpz_cmp (start
->value
.integer
, end
->value
.integer
) > 0)
4096 /* Stride is negative */
4097 if (mpz_cmp (start
->value
.integer
, end
->value
.integer
) < 0)
4102 mpz_sub (rem
, end
->value
.integer
, start
->value
.integer
);
4103 mpz_tdiv_r (rem
, rem
, stride
->value
.integer
);
4104 mpz_sub (last
, end
->value
.integer
, rem
);
4111 /* Compare a single dimension of an array reference to the array
4115 check_dimension (int i
, gfc_array_ref
*ar
, gfc_array_spec
*as
)
4119 if (ar
->dimen_type
[i
] == DIMEN_STAR
)
4121 gcc_assert (ar
->stride
[i
] == NULL
);
4122 /* This implies [*] as [*:] and [*:3] are not possible. */
4123 if (ar
->start
[i
] == NULL
)
4125 gcc_assert (ar
->end
[i
] == NULL
);
4130 /* Given start, end and stride values, calculate the minimum and
4131 maximum referenced indexes. */
4133 switch (ar
->dimen_type
[i
])
4136 case DIMEN_THIS_IMAGE
:
4141 if (compare_bound (ar
->start
[i
], as
->lower
[i
]) == CMP_LT
)
4144 gfc_warning (0, "Array reference at %L is out of bounds "
4145 "(%ld < %ld) in dimension %d", &ar
->c_where
[i
],
4146 mpz_get_si (ar
->start
[i
]->value
.integer
),
4147 mpz_get_si (as
->lower
[i
]->value
.integer
), i
+1);
4149 gfc_warning (0, "Array reference at %L is out of bounds "
4150 "(%ld < %ld) in codimension %d", &ar
->c_where
[i
],
4151 mpz_get_si (ar
->start
[i
]->value
.integer
),
4152 mpz_get_si (as
->lower
[i
]->value
.integer
),
4156 if (compare_bound (ar
->start
[i
], as
->upper
[i
]) == CMP_GT
)
4159 gfc_warning (0, "Array reference at %L is out of bounds "
4160 "(%ld > %ld) in dimension %d", &ar
->c_where
[i
],
4161 mpz_get_si (ar
->start
[i
]->value
.integer
),
4162 mpz_get_si (as
->upper
[i
]->value
.integer
), i
+1);
4164 gfc_warning (0, "Array reference at %L is out of bounds "
4165 "(%ld > %ld) in codimension %d", &ar
->c_where
[i
],
4166 mpz_get_si (ar
->start
[i
]->value
.integer
),
4167 mpz_get_si (as
->upper
[i
]->value
.integer
),
4176 #define AR_START (ar->start[i] ? ar->start[i] : as->lower[i])
4177 #define AR_END (ar->end[i] ? ar->end[i] : as->upper[i])
4179 compare_result comp_start_end
= compare_bound (AR_START
, AR_END
);
4181 /* Check for zero stride, which is not allowed. */
4182 if (compare_bound_int (ar
->stride
[i
], 0) == CMP_EQ
)
4184 gfc_error ("Illegal stride of zero at %L", &ar
->c_where
[i
]);
4188 /* if start == len || (stride > 0 && start < len)
4189 || (stride < 0 && start > len),
4190 then the array section contains at least one element. In this
4191 case, there is an out-of-bounds access if
4192 (start < lower || start > upper). */
4193 if (compare_bound (AR_START
, AR_END
) == CMP_EQ
4194 || ((compare_bound_int (ar
->stride
[i
], 0) == CMP_GT
4195 || ar
->stride
[i
] == NULL
) && comp_start_end
== CMP_LT
)
4196 || (compare_bound_int (ar
->stride
[i
], 0) == CMP_LT
4197 && comp_start_end
== CMP_GT
))
4199 if (compare_bound (AR_START
, as
->lower
[i
]) == CMP_LT
)
4201 gfc_warning (0, "Lower array reference at %L is out of bounds "
4202 "(%ld < %ld) in dimension %d", &ar
->c_where
[i
],
4203 mpz_get_si (AR_START
->value
.integer
),
4204 mpz_get_si (as
->lower
[i
]->value
.integer
), i
+1);
4207 if (compare_bound (AR_START
, as
->upper
[i
]) == CMP_GT
)
4209 gfc_warning (0, "Lower array reference at %L is out of bounds "
4210 "(%ld > %ld) in dimension %d", &ar
->c_where
[i
],
4211 mpz_get_si (AR_START
->value
.integer
),
4212 mpz_get_si (as
->upper
[i
]->value
.integer
), i
+1);
4217 /* If we can compute the highest index of the array section,
4218 then it also has to be between lower and upper. */
4219 mpz_init (last_value
);
4220 if (compute_last_value_for_triplet (AR_START
, AR_END
, ar
->stride
[i
],
4223 if (compare_bound_mpz_t (as
->lower
[i
], last_value
) == CMP_GT
)
4225 gfc_warning (0, "Upper array reference at %L is out of bounds "
4226 "(%ld < %ld) in dimension %d", &ar
->c_where
[i
],
4227 mpz_get_si (last_value
),
4228 mpz_get_si (as
->lower
[i
]->value
.integer
), i
+1);
4229 mpz_clear (last_value
);
4232 if (compare_bound_mpz_t (as
->upper
[i
], last_value
) == CMP_LT
)
4234 gfc_warning (0, "Upper array reference at %L is out of bounds "
4235 "(%ld > %ld) in dimension %d", &ar
->c_where
[i
],
4236 mpz_get_si (last_value
),
4237 mpz_get_si (as
->upper
[i
]->value
.integer
), i
+1);
4238 mpz_clear (last_value
);
4242 mpz_clear (last_value
);
4250 gfc_internal_error ("check_dimension(): Bad array reference");
4257 /* Compare an array reference with an array specification. */
4260 compare_spec_to_ref (gfc_array_ref
*ar
)
4267 /* TODO: Full array sections are only allowed as actual parameters. */
4268 if (as
->type
== AS_ASSUMED_SIZE
4269 && (/*ar->type == AR_FULL
4270 ||*/ (ar
->type
== AR_SECTION
4271 && ar
->dimen_type
[i
] == DIMEN_RANGE
&& ar
->end
[i
] == NULL
)))
4273 gfc_error ("Rightmost upper bound of assumed size array section "
4274 "not specified at %L", &ar
->where
);
4278 if (ar
->type
== AR_FULL
)
4281 if (as
->rank
!= ar
->dimen
)
4283 gfc_error ("Rank mismatch in array reference at %L (%d/%d)",
4284 &ar
->where
, ar
->dimen
, as
->rank
);
4288 /* ar->codimen == 0 is a local array. */
4289 if (as
->corank
!= ar
->codimen
&& ar
->codimen
!= 0)
4291 gfc_error ("Coindex rank mismatch in array reference at %L (%d/%d)",
4292 &ar
->where
, ar
->codimen
, as
->corank
);
4296 for (i
= 0; i
< as
->rank
; i
++)
4297 if (!check_dimension (i
, ar
, as
))
4300 /* Local access has no coarray spec. */
4301 if (ar
->codimen
!= 0)
4302 for (i
= as
->rank
; i
< as
->rank
+ as
->corank
; i
++)
4304 if (ar
->dimen_type
[i
] != DIMEN_ELEMENT
&& !ar
->in_allocate
4305 && ar
->dimen_type
[i
] != DIMEN_THIS_IMAGE
)
4307 gfc_error ("Coindex of codimension %d must be a scalar at %L",
4308 i
+ 1 - as
->rank
, &ar
->where
);
4311 if (!check_dimension (i
, ar
, as
))
4319 /* Resolve one part of an array index. */
4322 gfc_resolve_index_1 (gfc_expr
*index
, int check_scalar
,
4323 int force_index_integer_kind
)
4330 if (!gfc_resolve_expr (index
))
4333 if (check_scalar
&& index
->rank
!= 0)
4335 gfc_error ("Array index at %L must be scalar", &index
->where
);
4339 if (index
->ts
.type
!= BT_INTEGER
&& index
->ts
.type
!= BT_REAL
)
4341 gfc_error ("Array index at %L must be of INTEGER type, found %s",
4342 &index
->where
, gfc_basic_typename (index
->ts
.type
));
4346 if (index
->ts
.type
== BT_REAL
)
4347 if (!gfc_notify_std (GFC_STD_LEGACY
, "REAL array index at %L",
4351 if ((index
->ts
.kind
!= gfc_index_integer_kind
4352 && force_index_integer_kind
)
4353 || index
->ts
.type
!= BT_INTEGER
)
4356 ts
.type
= BT_INTEGER
;
4357 ts
.kind
= gfc_index_integer_kind
;
4359 gfc_convert_type_warn (index
, &ts
, 2, 0);
4365 /* Resolve one part of an array index. */
4368 gfc_resolve_index (gfc_expr
*index
, int check_scalar
)
4370 return gfc_resolve_index_1 (index
, check_scalar
, 1);
4373 /* Resolve a dim argument to an intrinsic function. */
4376 gfc_resolve_dim_arg (gfc_expr
*dim
)
4381 if (!gfc_resolve_expr (dim
))
4386 gfc_error ("Argument dim at %L must be scalar", &dim
->where
);
4391 if (dim
->ts
.type
!= BT_INTEGER
)
4393 gfc_error ("Argument dim at %L must be of INTEGER type", &dim
->where
);
4397 if (dim
->ts
.kind
!= gfc_index_integer_kind
)
4402 ts
.type
= BT_INTEGER
;
4403 ts
.kind
= gfc_index_integer_kind
;
4405 gfc_convert_type_warn (dim
, &ts
, 2, 0);
4411 /* Given an expression that contains array references, update those array
4412 references to point to the right array specifications. While this is
4413 filled in during matching, this information is difficult to save and load
4414 in a module, so we take care of it here.
4416 The idea here is that the original array reference comes from the
4417 base symbol. We traverse the list of reference structures, setting
4418 the stored reference to references. Component references can
4419 provide an additional array specification. */
4422 find_array_spec (gfc_expr
*e
)
4428 if (e
->symtree
->n
.sym
->ts
.type
== BT_CLASS
)
4429 as
= CLASS_DATA (e
->symtree
->n
.sym
)->as
;
4431 as
= e
->symtree
->n
.sym
->as
;
4433 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
4438 gfc_internal_error ("find_array_spec(): Missing spec");
4445 c
= ref
->u
.c
.component
;
4446 if (c
->attr
.dimension
)
4449 gfc_internal_error ("find_array_spec(): unused as(1)");
4460 gfc_internal_error ("find_array_spec(): unused as(2)");
4464 /* Resolve an array reference. */
4467 resolve_array_ref (gfc_array_ref
*ar
)
4469 int i
, check_scalar
;
4472 for (i
= 0; i
< ar
->dimen
+ ar
->codimen
; i
++)
4474 check_scalar
= ar
->dimen_type
[i
] == DIMEN_RANGE
;
4476 /* Do not force gfc_index_integer_kind for the start. We can
4477 do fine with any integer kind. This avoids temporary arrays
4478 created for indexing with a vector. */
4479 if (!gfc_resolve_index_1 (ar
->start
[i
], check_scalar
, 0))
4481 if (!gfc_resolve_index (ar
->end
[i
], check_scalar
))
4483 if (!gfc_resolve_index (ar
->stride
[i
], check_scalar
))
4488 if (ar
->dimen_type
[i
] == DIMEN_UNKNOWN
)
4492 ar
->dimen_type
[i
] = DIMEN_ELEMENT
;
4496 ar
->dimen_type
[i
] = DIMEN_VECTOR
;
4497 if (e
->expr_type
== EXPR_VARIABLE
4498 && e
->symtree
->n
.sym
->ts
.type
== BT_DERIVED
)
4499 ar
->start
[i
] = gfc_get_parentheses (e
);
4503 gfc_error ("Array index at %L is an array of rank %d",
4504 &ar
->c_where
[i
], e
->rank
);
4508 /* Fill in the upper bound, which may be lower than the
4509 specified one for something like a(2:10:5), which is
4510 identical to a(2:7:5). Only relevant for strides not equal
4511 to one. Don't try a division by zero. */
4512 if (ar
->dimen_type
[i
] == DIMEN_RANGE
4513 && ar
->stride
[i
] != NULL
&& ar
->stride
[i
]->expr_type
== EXPR_CONSTANT
4514 && mpz_cmp_si (ar
->stride
[i
]->value
.integer
, 1L) != 0
4515 && mpz_cmp_si (ar
->stride
[i
]->value
.integer
, 0L) != 0)
4519 if (gfc_ref_dimen_size (ar
, i
, &size
, &end
))
4521 if (ar
->end
[i
] == NULL
)
4524 gfc_get_constant_expr (BT_INTEGER
, gfc_index_integer_kind
,
4526 mpz_set (ar
->end
[i
]->value
.integer
, end
);
4528 else if (ar
->end
[i
]->ts
.type
== BT_INTEGER
4529 && ar
->end
[i
]->expr_type
== EXPR_CONSTANT
)
4531 mpz_set (ar
->end
[i
]->value
.integer
, end
);
4542 if (ar
->type
== AR_FULL
)
4544 if (ar
->as
->rank
== 0)
4545 ar
->type
= AR_ELEMENT
;
4547 /* Make sure array is the same as array(:,:), this way
4548 we don't need to special case all the time. */
4549 ar
->dimen
= ar
->as
->rank
;
4550 for (i
= 0; i
< ar
->dimen
; i
++)
4552 ar
->dimen_type
[i
] = DIMEN_RANGE
;
4554 gcc_assert (ar
->start
[i
] == NULL
);
4555 gcc_assert (ar
->end
[i
] == NULL
);
4556 gcc_assert (ar
->stride
[i
] == NULL
);
4560 /* If the reference type is unknown, figure out what kind it is. */
4562 if (ar
->type
== AR_UNKNOWN
)
4564 ar
->type
= AR_ELEMENT
;
4565 for (i
= 0; i
< ar
->dimen
; i
++)
4566 if (ar
->dimen_type
[i
] == DIMEN_RANGE
4567 || ar
->dimen_type
[i
] == DIMEN_VECTOR
)
4569 ar
->type
= AR_SECTION
;
4574 if (!ar
->as
->cray_pointee
&& !compare_spec_to_ref (ar
))
4577 if (ar
->as
->corank
&& ar
->codimen
== 0)
4580 ar
->codimen
= ar
->as
->corank
;
4581 for (n
= ar
->dimen
; n
< ar
->dimen
+ ar
->codimen
; n
++)
4582 ar
->dimen_type
[n
] = DIMEN_THIS_IMAGE
;
4590 resolve_substring (gfc_ref
*ref
)
4592 int k
= gfc_validate_kind (BT_INTEGER
, gfc_charlen_int_kind
, false);
4594 if (ref
->u
.ss
.start
!= NULL
)
4596 if (!gfc_resolve_expr (ref
->u
.ss
.start
))
4599 if (ref
->u
.ss
.start
->ts
.type
!= BT_INTEGER
)
4601 gfc_error ("Substring start index at %L must be of type INTEGER",
4602 &ref
->u
.ss
.start
->where
);
4606 if (ref
->u
.ss
.start
->rank
!= 0)
4608 gfc_error ("Substring start index at %L must be scalar",
4609 &ref
->u
.ss
.start
->where
);
4613 if (compare_bound_int (ref
->u
.ss
.start
, 1) == CMP_LT
4614 && (compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_EQ
4615 || compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_GT
))
4617 gfc_error ("Substring start index at %L is less than one",
4618 &ref
->u
.ss
.start
->where
);
4623 if (ref
->u
.ss
.end
!= NULL
)
4625 if (!gfc_resolve_expr (ref
->u
.ss
.end
))
4628 if (ref
->u
.ss
.end
->ts
.type
!= BT_INTEGER
)
4630 gfc_error ("Substring end index at %L must be of type INTEGER",
4631 &ref
->u
.ss
.end
->where
);
4635 if (ref
->u
.ss
.end
->rank
!= 0)
4637 gfc_error ("Substring end index at %L must be scalar",
4638 &ref
->u
.ss
.end
->where
);
4642 if (ref
->u
.ss
.length
!= NULL
4643 && compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.length
->length
) == CMP_GT
4644 && (compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_EQ
4645 || compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_GT
))
4647 gfc_error ("Substring end index at %L exceeds the string length",
4648 &ref
->u
.ss
.start
->where
);
4652 if (compare_bound_mpz_t (ref
->u
.ss
.end
,
4653 gfc_integer_kinds
[k
].huge
) == CMP_GT
4654 && (compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_EQ
4655 || compare_bound (ref
->u
.ss
.end
, ref
->u
.ss
.start
) == CMP_GT
))
4657 gfc_error ("Substring end index at %L is too large",
4658 &ref
->u
.ss
.end
->where
);
4667 /* This function supplies missing substring charlens. */
4670 gfc_resolve_substring_charlen (gfc_expr
*e
)
4673 gfc_expr
*start
, *end
;
4674 gfc_typespec
*ts
= NULL
;
4676 for (char_ref
= e
->ref
; char_ref
; char_ref
= char_ref
->next
)
4678 if (char_ref
->type
== REF_SUBSTRING
)
4680 if (char_ref
->type
== REF_COMPONENT
)
4681 ts
= &char_ref
->u
.c
.component
->ts
;
4687 gcc_assert (char_ref
->next
== NULL
);
4691 if (e
->ts
.u
.cl
->length
)
4692 gfc_free_expr (e
->ts
.u
.cl
->length
);
4693 else if (e
->expr_type
== EXPR_VARIABLE
&& e
->symtree
->n
.sym
->attr
.dummy
)
4697 e
->ts
.type
= BT_CHARACTER
;
4698 e
->ts
.kind
= gfc_default_character_kind
;
4701 e
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
4703 if (char_ref
->u
.ss
.start
)
4704 start
= gfc_copy_expr (char_ref
->u
.ss
.start
);
4706 start
= gfc_get_int_expr (gfc_default_integer_kind
, NULL
, 1);
4708 if (char_ref
->u
.ss
.end
)
4709 end
= gfc_copy_expr (char_ref
->u
.ss
.end
);
4710 else if (e
->expr_type
== EXPR_VARIABLE
)
4713 ts
= &e
->symtree
->n
.sym
->ts
;
4714 end
= gfc_copy_expr (ts
->u
.cl
->length
);
4721 gfc_free_expr (start
);
4722 gfc_free_expr (end
);
4726 /* Length = (end - start + 1). */
4727 e
->ts
.u
.cl
->length
= gfc_subtract (end
, start
);
4728 e
->ts
.u
.cl
->length
= gfc_add (e
->ts
.u
.cl
->length
,
4729 gfc_get_int_expr (gfc_default_integer_kind
,
4732 /* F2008, 6.4.1: Both the starting point and the ending point shall
4733 be within the range 1, 2, ..., n unless the starting point exceeds
4734 the ending point, in which case the substring has length zero. */
4736 if (mpz_cmp_si (e
->ts
.u
.cl
->length
->value
.integer
, 0) < 0)
4737 mpz_set_si (e
->ts
.u
.cl
->length
->value
.integer
, 0);
4739 e
->ts
.u
.cl
->length
->ts
.type
= BT_INTEGER
;
4740 e
->ts
.u
.cl
->length
->ts
.kind
= gfc_charlen_int_kind
;
4742 /* Make sure that the length is simplified. */
4743 gfc_simplify_expr (e
->ts
.u
.cl
->length
, 1);
4744 gfc_resolve_expr (e
->ts
.u
.cl
->length
);
4748 /* Resolve subtype references. */
4751 resolve_ref (gfc_expr
*expr
)
4753 int current_part_dimension
, n_components
, seen_part_dimension
;
4756 for (ref
= expr
->ref
; ref
; ref
= ref
->next
)
4757 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.as
== NULL
)
4759 find_array_spec (expr
);
4763 for (ref
= expr
->ref
; ref
; ref
= ref
->next
)
4767 if (!resolve_array_ref (&ref
->u
.ar
))
4775 if (!resolve_substring (ref
))
4780 /* Check constraints on part references. */
4782 current_part_dimension
= 0;
4783 seen_part_dimension
= 0;
4786 for (ref
= expr
->ref
; ref
; ref
= ref
->next
)
4791 switch (ref
->u
.ar
.type
)
4794 /* Coarray scalar. */
4795 if (ref
->u
.ar
.as
->rank
== 0)
4797 current_part_dimension
= 0;
4802 current_part_dimension
= 1;
4806 current_part_dimension
= 0;
4810 gfc_internal_error ("resolve_ref(): Bad array reference");
4816 if (current_part_dimension
|| seen_part_dimension
)
4819 if (ref
->u
.c
.component
->attr
.pointer
4820 || ref
->u
.c
.component
->attr
.proc_pointer
4821 || (ref
->u
.c
.component
->ts
.type
== BT_CLASS
4822 && CLASS_DATA (ref
->u
.c
.component
)->attr
.pointer
))
4824 gfc_error ("Component to the right of a part reference "
4825 "with nonzero rank must not have the POINTER "
4826 "attribute at %L", &expr
->where
);
4829 else if (ref
->u
.c
.component
->attr
.allocatable
4830 || (ref
->u
.c
.component
->ts
.type
== BT_CLASS
4831 && CLASS_DATA (ref
->u
.c
.component
)->attr
.allocatable
))
4834 gfc_error ("Component to the right of a part reference "
4835 "with nonzero rank must not have the ALLOCATABLE "
4836 "attribute at %L", &expr
->where
);
4848 if (((ref
->type
== REF_COMPONENT
&& n_components
> 1)
4849 || ref
->next
== NULL
)
4850 && current_part_dimension
4851 && seen_part_dimension
)
4853 gfc_error ("Two or more part references with nonzero rank must "
4854 "not be specified at %L", &expr
->where
);
4858 if (ref
->type
== REF_COMPONENT
)
4860 if (current_part_dimension
)
4861 seen_part_dimension
= 1;
4863 /* reset to make sure */
4864 current_part_dimension
= 0;
4872 /* Given an expression, determine its shape. This is easier than it sounds.
4873 Leaves the shape array NULL if it is not possible to determine the shape. */
4876 expression_shape (gfc_expr
*e
)
4878 mpz_t array
[GFC_MAX_DIMENSIONS
];
4881 if (e
->rank
<= 0 || e
->shape
!= NULL
)
4884 for (i
= 0; i
< e
->rank
; i
++)
4885 if (!gfc_array_dimen_size (e
, i
, &array
[i
]))
4888 e
->shape
= gfc_get_shape (e
->rank
);
4890 memcpy (e
->shape
, array
, e
->rank
* sizeof (mpz_t
));
4895 for (i
--; i
>= 0; i
--)
4896 mpz_clear (array
[i
]);
4900 /* Given a variable expression node, compute the rank of the expression by
4901 examining the base symbol and any reference structures it may have. */
4904 expression_rank (gfc_expr
*e
)
4909 /* Just to make sure, because EXPR_COMPCALL's also have an e->ref and that
4910 could lead to serious confusion... */
4911 gcc_assert (e
->expr_type
!= EXPR_COMPCALL
);
4915 if (e
->expr_type
== EXPR_ARRAY
)
4917 /* Constructors can have a rank different from one via RESHAPE(). */
4919 if (e
->symtree
== NULL
)
4925 e
->rank
= (e
->symtree
->n
.sym
->as
== NULL
)
4926 ? 0 : e
->symtree
->n
.sym
->as
->rank
;
4932 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
4934 if (ref
->type
== REF_COMPONENT
&& ref
->u
.c
.component
->attr
.proc_pointer
4935 && ref
->u
.c
.component
->attr
.function
&& !ref
->next
)
4936 rank
= ref
->u
.c
.component
->as
? ref
->u
.c
.component
->as
->rank
: 0;
4938 if (ref
->type
!= REF_ARRAY
)
4941 if (ref
->u
.ar
.type
== AR_FULL
)
4943 rank
= ref
->u
.ar
.as
->rank
;
4947 if (ref
->u
.ar
.type
== AR_SECTION
)
4949 /* Figure out the rank of the section. */
4951 gfc_internal_error ("expression_rank(): Two array specs");
4953 for (i
= 0; i
< ref
->u
.ar
.dimen
; i
++)
4954 if (ref
->u
.ar
.dimen_type
[i
] == DIMEN_RANGE
4955 || ref
->u
.ar
.dimen_type
[i
] == DIMEN_VECTOR
)
4965 expression_shape (e
);
4970 add_caf_get_intrinsic (gfc_expr
*e
)
4972 gfc_expr
*wrapper
, *tmp_expr
;
4976 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
4977 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.codimen
> 0)
4982 for (n
= ref
->u
.ar
.dimen
; n
< ref
->u
.ar
.dimen
+ ref
->u
.ar
.codimen
; n
++)
4983 if (ref
->u
.ar
.dimen_type
[n
] != DIMEN_ELEMENT
)
4986 tmp_expr
= XCNEW (gfc_expr
);
4988 wrapper
= gfc_build_intrinsic_call (gfc_current_ns
, GFC_ISYM_CAF_GET
,
4989 "caf_get", tmp_expr
->where
, 1, tmp_expr
);
4990 wrapper
->ts
= e
->ts
;
4991 wrapper
->rank
= e
->rank
;
4993 wrapper
->shape
= gfc_copy_shape (e
->shape
, e
->rank
);
5000 remove_caf_get_intrinsic (gfc_expr
*e
)
5002 gcc_assert (e
->expr_type
== EXPR_FUNCTION
&& e
->value
.function
.isym
5003 && e
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
);
5004 gfc_expr
*e2
= e
->value
.function
.actual
->expr
;
5005 e
->value
.function
.actual
->expr
= NULL
;
5006 gfc_free_actual_arglist (e
->value
.function
.actual
);
5007 gfc_free_shape (&e
->shape
, e
->rank
);
5013 /* Resolve a variable expression. */
5016 resolve_variable (gfc_expr
*e
)
5023 if (e
->symtree
== NULL
)
5025 sym
= e
->symtree
->n
.sym
;
5027 /* Use same check as for TYPE(*) below; this check has to be before TYPE(*)
5028 as ts.type is set to BT_ASSUMED in resolve_symbol. */
5029 if (sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
))
5031 if (!actual_arg
|| inquiry_argument
)
5033 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may only "
5034 "be used as actual argument", sym
->name
, &e
->where
);
5038 /* TS 29113, 407b. */
5039 else if (e
->ts
.type
== BT_ASSUMED
)
5043 gfc_error ("Assumed-type variable %s at %L may only be used "
5044 "as actual argument", sym
->name
, &e
->where
);
5047 else if (inquiry_argument
&& !first_actual_arg
)
5049 /* FIXME: It doesn't work reliably as inquiry_argument is not set
5050 for all inquiry functions in resolve_function; the reason is
5051 that the function-name resolution happens too late in that
5053 gfc_error ("Assumed-type variable %s at %L as actual argument to "
5054 "an inquiry function shall be the first argument",
5055 sym
->name
, &e
->where
);
5059 /* TS 29113, C535b. */
5060 else if ((sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
5061 && CLASS_DATA (sym
)->as
5062 && CLASS_DATA (sym
)->as
->type
== AS_ASSUMED_RANK
)
5063 || (sym
->ts
.type
!= BT_CLASS
&& sym
->as
5064 && sym
->as
->type
== AS_ASSUMED_RANK
))
5068 gfc_error ("Assumed-rank variable %s at %L may only be used as "
5069 "actual argument", sym
->name
, &e
->where
);
5072 else if (inquiry_argument
&& !first_actual_arg
)
5074 /* FIXME: It doesn't work reliably as inquiry_argument is not set
5075 for all inquiry functions in resolve_function; the reason is
5076 that the function-name resolution happens too late in that
5078 gfc_error ("Assumed-rank variable %s at %L as actual argument "
5079 "to an inquiry function shall be the first argument",
5080 sym
->name
, &e
->where
);
5085 if ((sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
)) && e
->ref
5086 && !(e
->ref
->type
== REF_ARRAY
&& e
->ref
->u
.ar
.type
== AR_FULL
5087 && e
->ref
->next
== NULL
))
5089 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall not have "
5090 "a subobject reference", sym
->name
, &e
->ref
->u
.ar
.where
);
5093 /* TS 29113, 407b. */
5094 else if (e
->ts
.type
== BT_ASSUMED
&& e
->ref
5095 && !(e
->ref
->type
== REF_ARRAY
&& e
->ref
->u
.ar
.type
== AR_FULL
5096 && e
->ref
->next
== NULL
))
5098 gfc_error ("Assumed-type variable %s at %L shall not have a subobject "
5099 "reference", sym
->name
, &e
->ref
->u
.ar
.where
);
5103 /* TS 29113, C535b. */
5104 if (((sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
5105 && CLASS_DATA (sym
)->as
5106 && CLASS_DATA (sym
)->as
->type
== AS_ASSUMED_RANK
)
5107 || (sym
->ts
.type
!= BT_CLASS
&& sym
->as
5108 && sym
->as
->type
== AS_ASSUMED_RANK
))
5110 && !(e
->ref
->type
== REF_ARRAY
&& e
->ref
->u
.ar
.type
== AR_FULL
5111 && e
->ref
->next
== NULL
))
5113 gfc_error ("Assumed-rank variable %s at %L shall not have a subobject "
5114 "reference", sym
->name
, &e
->ref
->u
.ar
.where
);
5118 /* For variables that are used in an associate (target => object) where
5119 the object's basetype is array valued while the target is scalar,
5120 the ts' type of the component refs is still array valued, which
5121 can't be translated that way. */
5122 if (sym
->assoc
&& e
->rank
== 0 && e
->ref
&& sym
->ts
.type
== BT_CLASS
5123 && sym
->assoc
->target
->ts
.type
== BT_CLASS
5124 && CLASS_DATA (sym
->assoc
->target
)->as
)
5126 gfc_ref
*ref
= e
->ref
;
5132 ref
->u
.c
.sym
= sym
->ts
.u
.derived
;
5133 /* Stop the loop. */
5143 /* If this is an associate-name, it may be parsed with an array reference
5144 in error even though the target is scalar. Fail directly in this case.
5145 TODO Understand why class scalar expressions must be excluded. */
5146 if (sym
->assoc
&& !(sym
->ts
.type
== BT_CLASS
&& e
->rank
== 0))
5148 if (sym
->ts
.type
== BT_CLASS
)
5149 gfc_fix_class_refs (e
);
5150 if (!sym
->attr
.dimension
&& e
->ref
&& e
->ref
->type
== REF_ARRAY
)
5154 if (sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.generic
)
5155 sym
->ts
.u
.derived
= gfc_find_dt_in_generic (sym
->ts
.u
.derived
);
5157 /* On the other hand, the parser may not have known this is an array;
5158 in this case, we have to add a FULL reference. */
5159 if (sym
->assoc
&& sym
->attr
.dimension
&& !e
->ref
)
5161 e
->ref
= gfc_get_ref ();
5162 e
->ref
->type
= REF_ARRAY
;
5163 e
->ref
->u
.ar
.type
= AR_FULL
;
5164 e
->ref
->u
.ar
.dimen
= 0;
5167 /* Like above, but for class types, where the checking whether an array
5168 ref is present is more complicated. Furthermore make sure not to add
5169 the full array ref to _vptr or _len refs. */
5170 if (sym
->assoc
&& sym
->ts
.type
== BT_CLASS
5171 && CLASS_DATA (sym
)->attr
.dimension
5172 && (e
->ts
.type
!= BT_DERIVED
|| !e
->ts
.u
.derived
->attr
.vtype
))
5174 gfc_ref
*ref
, *newref
;
5176 newref
= gfc_get_ref ();
5177 newref
->type
= REF_ARRAY
;
5178 newref
->u
.ar
.type
= AR_FULL
;
5179 newref
->u
.ar
.dimen
= 0;
5180 /* Because this is an associate var and the first ref either is a ref to
5181 the _data component or not, no traversal of the ref chain is
5182 needed. The array ref needs to be inserted after the _data ref,
5183 or when that is not present, which may happend for polymorphic
5184 types, then at the first position. */
5188 else if (ref
->type
== REF_COMPONENT
5189 && strcmp ("_data", ref
->u
.c
.component
->name
) == 0)
5191 if (!ref
->next
|| ref
->next
->type
!= REF_ARRAY
)
5193 newref
->next
= ref
->next
;
5197 /* Array ref present already. */
5198 gfc_free_ref_list (newref
);
5200 else if (ref
->type
== REF_ARRAY
)
5201 /* Array ref present already. */
5202 gfc_free_ref_list (newref
);
5210 if (e
->ref
&& !resolve_ref (e
))
5213 if (sym
->attr
.flavor
== FL_PROCEDURE
5214 && (!sym
->attr
.function
5215 || (sym
->attr
.function
&& sym
->result
5216 && sym
->result
->attr
.proc_pointer
5217 && !sym
->result
->attr
.function
)))
5219 e
->ts
.type
= BT_PROCEDURE
;
5220 goto resolve_procedure
;
5223 if (sym
->ts
.type
!= BT_UNKNOWN
)
5224 gfc_variable_attr (e
, &e
->ts
);
5225 else if (sym
->attr
.flavor
== FL_PROCEDURE
5226 && sym
->attr
.function
&& sym
->result
5227 && sym
->result
->ts
.type
!= BT_UNKNOWN
5228 && sym
->result
->attr
.proc_pointer
)
5229 e
->ts
= sym
->result
->ts
;
5232 /* Must be a simple variable reference. */
5233 if (!gfc_set_default_type (sym
, 1, sym
->ns
))
5238 if (check_assumed_size_reference (sym
, e
))
5241 /* Deal with forward references to entries during gfc_resolve_code, to
5242 satisfy, at least partially, 12.5.2.5. */
5243 if (gfc_current_ns
->entries
5244 && current_entry_id
== sym
->entry_id
5247 && cs_base
->current
->op
!= EXEC_ENTRY
)
5249 gfc_entry_list
*entry
;
5250 gfc_formal_arglist
*formal
;
5252 bool seen
, saved_specification_expr
;
5254 /* If the symbol is a dummy... */
5255 if (sym
->attr
.dummy
&& sym
->ns
== gfc_current_ns
)
5257 entry
= gfc_current_ns
->entries
;
5260 /* ...test if the symbol is a parameter of previous entries. */
5261 for (; entry
&& entry
->id
<= current_entry_id
; entry
= entry
->next
)
5262 for (formal
= entry
->sym
->formal
; formal
; formal
= formal
->next
)
5264 if (formal
->sym
&& sym
->name
== formal
->sym
->name
)
5271 /* If it has not been seen as a dummy, this is an error. */
5274 if (specification_expr
)
5275 gfc_error ("Variable %qs, used in a specification expression"
5276 ", is referenced at %L before the ENTRY statement "
5277 "in which it is a parameter",
5278 sym
->name
, &cs_base
->current
->loc
);
5280 gfc_error ("Variable %qs is used at %L before the ENTRY "
5281 "statement in which it is a parameter",
5282 sym
->name
, &cs_base
->current
->loc
);
5287 /* Now do the same check on the specification expressions. */
5288 saved_specification_expr
= specification_expr
;
5289 specification_expr
= true;
5290 if (sym
->ts
.type
== BT_CHARACTER
5291 && !gfc_resolve_expr (sym
->ts
.u
.cl
->length
))
5295 for (n
= 0; n
< sym
->as
->rank
; n
++)
5297 if (!gfc_resolve_expr (sym
->as
->lower
[n
]))
5299 if (!gfc_resolve_expr (sym
->as
->upper
[n
]))
5302 specification_expr
= saved_specification_expr
;
5305 /* Update the symbol's entry level. */
5306 sym
->entry_id
= current_entry_id
+ 1;
5309 /* If a symbol has been host_associated mark it. This is used latter,
5310 to identify if aliasing is possible via host association. */
5311 if (sym
->attr
.flavor
== FL_VARIABLE
5312 && gfc_current_ns
->parent
5313 && (gfc_current_ns
->parent
== sym
->ns
5314 || (gfc_current_ns
->parent
->parent
5315 && gfc_current_ns
->parent
->parent
== sym
->ns
)))
5316 sym
->attr
.host_assoc
= 1;
5318 if (gfc_current_ns
->proc_name
5319 && sym
->attr
.dimension
5320 && (sym
->ns
!= gfc_current_ns
5321 || sym
->attr
.use_assoc
5322 || sym
->attr
.in_common
))
5323 gfc_current_ns
->proc_name
->attr
.array_outer_dependency
= 1;
5326 if (t
&& !resolve_procedure_expression (e
))
5329 /* F2008, C617 and C1229. */
5330 if (!inquiry_argument
&& (e
->ts
.type
== BT_CLASS
|| e
->ts
.type
== BT_DERIVED
)
5331 && gfc_is_coindexed (e
))
5333 gfc_ref
*ref
, *ref2
= NULL
;
5335 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5337 if (ref
->type
== REF_COMPONENT
)
5339 if (ref
->type
== REF_ARRAY
&& ref
->u
.ar
.codimen
> 0)
5343 for ( ; ref
; ref
= ref
->next
)
5344 if (ref
->type
== REF_COMPONENT
)
5347 /* Expression itself is not coindexed object. */
5348 if (ref
&& e
->ts
.type
== BT_CLASS
)
5350 gfc_error ("Polymorphic subobject of coindexed object at %L",
5355 /* Expression itself is coindexed object. */
5359 c
= ref2
? ref2
->u
.c
.component
: e
->symtree
->n
.sym
->components
;
5360 for ( ; c
; c
= c
->next
)
5361 if (c
->attr
.allocatable
&& c
->ts
.type
== BT_CLASS
)
5363 gfc_error ("Coindexed object with polymorphic allocatable "
5364 "subcomponent at %L", &e
->where
);
5372 expression_rank (e
);
5374 if (t
&& flag_coarray
== GFC_FCOARRAY_LIB
&& gfc_is_coindexed (e
))
5375 add_caf_get_intrinsic (e
);
5381 /* Checks to see that the correct symbol has been host associated.
5382 The only situation where this arises is that in which a twice
5383 contained function is parsed after the host association is made.
5384 Therefore, on detecting this, change the symbol in the expression
5385 and convert the array reference into an actual arglist if the old
5386 symbol is a variable. */
5388 check_host_association (gfc_expr
*e
)
5390 gfc_symbol
*sym
, *old_sym
;
5394 gfc_actual_arglist
*arg
, *tail
= NULL
;
5395 bool retval
= e
->expr_type
== EXPR_FUNCTION
;
5397 /* If the expression is the result of substitution in
5398 interface.c(gfc_extend_expr) because there is no way in
5399 which the host association can be wrong. */
5400 if (e
->symtree
== NULL
5401 || e
->symtree
->n
.sym
== NULL
5402 || e
->user_operator
)
5405 old_sym
= e
->symtree
->n
.sym
;
5407 if (gfc_current_ns
->parent
5408 && old_sym
->ns
!= gfc_current_ns
)
5410 /* Use the 'USE' name so that renamed module symbols are
5411 correctly handled. */
5412 gfc_find_symbol (e
->symtree
->name
, gfc_current_ns
, 1, &sym
);
5414 if (sym
&& old_sym
!= sym
5415 && sym
->ts
.type
== old_sym
->ts
.type
5416 && sym
->attr
.flavor
== FL_PROCEDURE
5417 && sym
->attr
.contained
)
5419 /* Clear the shape, since it might not be valid. */
5420 gfc_free_shape (&e
->shape
, e
->rank
);
5422 /* Give the expression the right symtree! */
5423 gfc_find_sym_tree (e
->symtree
->name
, NULL
, 1, &st
);
5424 gcc_assert (st
!= NULL
);
5426 if (old_sym
->attr
.flavor
== FL_PROCEDURE
5427 || e
->expr_type
== EXPR_FUNCTION
)
5429 /* Original was function so point to the new symbol, since
5430 the actual argument list is already attached to the
5432 e
->value
.function
.esym
= NULL
;
5437 /* Original was variable so convert array references into
5438 an actual arglist. This does not need any checking now
5439 since resolve_function will take care of it. */
5440 e
->value
.function
.actual
= NULL
;
5441 e
->expr_type
= EXPR_FUNCTION
;
5444 /* Ambiguity will not arise if the array reference is not
5445 the last reference. */
5446 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5447 if (ref
->type
== REF_ARRAY
&& ref
->next
== NULL
)
5450 gcc_assert (ref
->type
== REF_ARRAY
);
5452 /* Grab the start expressions from the array ref and
5453 copy them into actual arguments. */
5454 for (n
= 0; n
< ref
->u
.ar
.dimen
; n
++)
5456 arg
= gfc_get_actual_arglist ();
5457 arg
->expr
= gfc_copy_expr (ref
->u
.ar
.start
[n
]);
5458 if (e
->value
.function
.actual
== NULL
)
5459 tail
= e
->value
.function
.actual
= arg
;
5467 /* Dump the reference list and set the rank. */
5468 gfc_free_ref_list (e
->ref
);
5470 e
->rank
= sym
->as
? sym
->as
->rank
: 0;
5473 gfc_resolve_expr (e
);
5477 /* This might have changed! */
5478 return e
->expr_type
== EXPR_FUNCTION
;
5483 gfc_resolve_character_operator (gfc_expr
*e
)
5485 gfc_expr
*op1
= e
->value
.op
.op1
;
5486 gfc_expr
*op2
= e
->value
.op
.op2
;
5487 gfc_expr
*e1
= NULL
;
5488 gfc_expr
*e2
= NULL
;
5490 gcc_assert (e
->value
.op
.op
== INTRINSIC_CONCAT
);
5492 if (op1
->ts
.u
.cl
&& op1
->ts
.u
.cl
->length
)
5493 e1
= gfc_copy_expr (op1
->ts
.u
.cl
->length
);
5494 else if (op1
->expr_type
== EXPR_CONSTANT
)
5495 e1
= gfc_get_int_expr (gfc_default_integer_kind
, NULL
,
5496 op1
->value
.character
.length
);
5498 if (op2
->ts
.u
.cl
&& op2
->ts
.u
.cl
->length
)
5499 e2
= gfc_copy_expr (op2
->ts
.u
.cl
->length
);
5500 else if (op2
->expr_type
== EXPR_CONSTANT
)
5501 e2
= gfc_get_int_expr (gfc_default_integer_kind
, NULL
,
5502 op2
->value
.character
.length
);
5504 e
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
5514 e
->ts
.u
.cl
->length
= gfc_add (e1
, e2
);
5515 e
->ts
.u
.cl
->length
->ts
.type
= BT_INTEGER
;
5516 e
->ts
.u
.cl
->length
->ts
.kind
= gfc_charlen_int_kind
;
5517 gfc_simplify_expr (e
->ts
.u
.cl
->length
, 0);
5518 gfc_resolve_expr (e
->ts
.u
.cl
->length
);
5524 /* Ensure that an character expression has a charlen and, if possible, a
5525 length expression. */
5528 fixup_charlen (gfc_expr
*e
)
5530 /* The cases fall through so that changes in expression type and the need
5531 for multiple fixes are picked up. In all circumstances, a charlen should
5532 be available for the middle end to hang a backend_decl on. */
5533 switch (e
->expr_type
)
5536 gfc_resolve_character_operator (e
);
5540 if (e
->expr_type
== EXPR_ARRAY
)
5541 gfc_resolve_character_array_constructor (e
);
5544 case EXPR_SUBSTRING
:
5545 if (!e
->ts
.u
.cl
&& e
->ref
)
5546 gfc_resolve_substring_charlen (e
);
5551 e
->ts
.u
.cl
= gfc_new_charlen (gfc_current_ns
, NULL
);
5558 /* Update an actual argument to include the passed-object for type-bound
5559 procedures at the right position. */
5561 static gfc_actual_arglist
*
5562 update_arglist_pass (gfc_actual_arglist
* lst
, gfc_expr
* po
, unsigned argpos
,
5565 gcc_assert (argpos
> 0);
5569 gfc_actual_arglist
* result
;
5571 result
= gfc_get_actual_arglist ();
5575 result
->name
= name
;
5581 lst
->next
= update_arglist_pass (lst
->next
, po
, argpos
- 1, name
);
5583 lst
= update_arglist_pass (NULL
, po
, argpos
- 1, name
);
5588 /* Extract the passed-object from an EXPR_COMPCALL (a copy of it). */
5591 extract_compcall_passed_object (gfc_expr
* e
)
5595 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
5597 if (e
->value
.compcall
.base_object
)
5598 po
= gfc_copy_expr (e
->value
.compcall
.base_object
);
5601 po
= gfc_get_expr ();
5602 po
->expr_type
= EXPR_VARIABLE
;
5603 po
->symtree
= e
->symtree
;
5604 po
->ref
= gfc_copy_ref (e
->ref
);
5605 po
->where
= e
->where
;
5608 if (!gfc_resolve_expr (po
))
5615 /* Update the arglist of an EXPR_COMPCALL expression to include the
5619 update_compcall_arglist (gfc_expr
* e
)
5622 gfc_typebound_proc
* tbp
;
5624 tbp
= e
->value
.compcall
.tbp
;
5629 po
= extract_compcall_passed_object (e
);
5633 if (tbp
->nopass
|| e
->value
.compcall
.ignore_pass
)
5639 gcc_assert (tbp
->pass_arg_num
> 0);
5640 e
->value
.compcall
.actual
= update_arglist_pass (e
->value
.compcall
.actual
, po
,
5648 /* Extract the passed object from a PPC call (a copy of it). */
5651 extract_ppc_passed_object (gfc_expr
*e
)
5656 po
= gfc_get_expr ();
5657 po
->expr_type
= EXPR_VARIABLE
;
5658 po
->symtree
= e
->symtree
;
5659 po
->ref
= gfc_copy_ref (e
->ref
);
5660 po
->where
= e
->where
;
5662 /* Remove PPC reference. */
5664 while ((*ref
)->next
)
5665 ref
= &(*ref
)->next
;
5666 gfc_free_ref_list (*ref
);
5669 if (!gfc_resolve_expr (po
))
5676 /* Update the actual arglist of a procedure pointer component to include the
5680 update_ppc_arglist (gfc_expr
* e
)
5684 gfc_typebound_proc
* tb
;
5686 ppc
= gfc_get_proc_ptr_comp (e
);
5694 else if (tb
->nopass
)
5697 po
= extract_ppc_passed_object (e
);
5704 gfc_error ("Passed-object at %L must be scalar", &e
->where
);
5709 if (po
->ts
.type
== BT_DERIVED
&& po
->ts
.u
.derived
->attr
.abstract
)
5711 gfc_error ("Base object for procedure-pointer component call at %L is of"
5712 " ABSTRACT type %qs", &e
->where
, po
->ts
.u
.derived
->name
);
5716 gcc_assert (tb
->pass_arg_num
> 0);
5717 e
->value
.compcall
.actual
= update_arglist_pass (e
->value
.compcall
.actual
, po
,
5725 /* Check that the object a TBP is called on is valid, i.e. it must not be
5726 of ABSTRACT type (as in subobject%abstract_parent%tbp()). */
5729 check_typebound_baseobject (gfc_expr
* e
)
5732 bool return_value
= false;
5734 base
= extract_compcall_passed_object (e
);
5738 gcc_assert (base
->ts
.type
== BT_DERIVED
|| base
->ts
.type
== BT_CLASS
);
5740 if (base
->ts
.type
== BT_CLASS
&& !gfc_expr_attr (base
).class_ok
)
5744 if (base
->ts
.type
== BT_DERIVED
&& base
->ts
.u
.derived
->attr
.abstract
)
5746 gfc_error ("Base object for type-bound procedure call at %L is of"
5747 " ABSTRACT type %qs", &e
->where
, base
->ts
.u
.derived
->name
);
5751 /* F08:C1230. If the procedure called is NOPASS,
5752 the base object must be scalar. */
5753 if (e
->value
.compcall
.tbp
->nopass
&& base
->rank
!= 0)
5755 gfc_error ("Base object for NOPASS type-bound procedure call at %L must"
5756 " be scalar", &e
->where
);
5760 return_value
= true;
5763 gfc_free_expr (base
);
5764 return return_value
;
5768 /* Resolve a call to a type-bound procedure, either function or subroutine,
5769 statically from the data in an EXPR_COMPCALL expression. The adapted
5770 arglist and the target-procedure symtree are returned. */
5773 resolve_typebound_static (gfc_expr
* e
, gfc_symtree
** target
,
5774 gfc_actual_arglist
** actual
)
5776 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
5777 gcc_assert (!e
->value
.compcall
.tbp
->is_generic
);
5779 /* Update the actual arglist for PASS. */
5780 if (!update_compcall_arglist (e
))
5783 *actual
= e
->value
.compcall
.actual
;
5784 *target
= e
->value
.compcall
.tbp
->u
.specific
;
5786 gfc_free_ref_list (e
->ref
);
5788 e
->value
.compcall
.actual
= NULL
;
5790 /* If we find a deferred typebound procedure, check for derived types
5791 that an overriding typebound procedure has not been missed. */
5792 if (e
->value
.compcall
.name
5793 && !e
->value
.compcall
.tbp
->non_overridable
5794 && e
->value
.compcall
.base_object
5795 && e
->value
.compcall
.base_object
->ts
.type
== BT_DERIVED
)
5798 gfc_symbol
*derived
;
5800 /* Use the derived type of the base_object. */
5801 derived
= e
->value
.compcall
.base_object
->ts
.u
.derived
;
5804 /* If necessary, go through the inheritance chain. */
5805 while (!st
&& derived
)
5807 /* Look for the typebound procedure 'name'. */
5808 if (derived
->f2k_derived
&& derived
->f2k_derived
->tb_sym_root
)
5809 st
= gfc_find_symtree (derived
->f2k_derived
->tb_sym_root
,
5810 e
->value
.compcall
.name
);
5812 derived
= gfc_get_derived_super_type (derived
);
5815 /* Now find the specific name in the derived type namespace. */
5816 if (st
&& st
->n
.tb
&& st
->n
.tb
->u
.specific
)
5817 gfc_find_sym_tree (st
->n
.tb
->u
.specific
->name
,
5818 derived
->ns
, 1, &st
);
5826 /* Get the ultimate declared type from an expression. In addition,
5827 return the last class/derived type reference and the copy of the
5828 reference list. If check_types is set true, derived types are
5829 identified as well as class references. */
5831 get_declared_from_expr (gfc_ref
**class_ref
, gfc_ref
**new_ref
,
5832 gfc_expr
*e
, bool check_types
)
5834 gfc_symbol
*declared
;
5841 *new_ref
= gfc_copy_ref (e
->ref
);
5843 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
5845 if (ref
->type
!= REF_COMPONENT
)
5848 if ((ref
->u
.c
.component
->ts
.type
== BT_CLASS
5849 || (check_types
&& gfc_bt_struct (ref
->u
.c
.component
->ts
.type
)))
5850 && ref
->u
.c
.component
->attr
.flavor
!= FL_PROCEDURE
)
5852 declared
= ref
->u
.c
.component
->ts
.u
.derived
;
5858 if (declared
== NULL
)
5859 declared
= e
->symtree
->n
.sym
->ts
.u
.derived
;
5865 /* Given an EXPR_COMPCALL calling a GENERIC typebound procedure, figure out
5866 which of the specific bindings (if any) matches the arglist and transform
5867 the expression into a call of that binding. */
5870 resolve_typebound_generic_call (gfc_expr
* e
, const char **name
)
5872 gfc_typebound_proc
* genproc
;
5873 const char* genname
;
5875 gfc_symbol
*derived
;
5877 gcc_assert (e
->expr_type
== EXPR_COMPCALL
);
5878 genname
= e
->value
.compcall
.name
;
5879 genproc
= e
->value
.compcall
.tbp
;
5881 if (!genproc
->is_generic
)
5884 /* Try the bindings on this type and in the inheritance hierarchy. */
5885 for (; genproc
; genproc
= genproc
->overridden
)
5889 gcc_assert (genproc
->is_generic
);
5890 for (g
= genproc
->u
.generic
; g
; g
= g
->next
)
5893 gfc_actual_arglist
* args
;
5896 gcc_assert (g
->specific
);
5898 if (g
->specific
->error
)
5901 target
= g
->specific
->u
.specific
->n
.sym
;
5903 /* Get the right arglist by handling PASS/NOPASS. */
5904 args
= gfc_copy_actual_arglist (e
->value
.compcall
.actual
);
5905 if (!g
->specific
->nopass
)
5908 po
= extract_compcall_passed_object (e
);
5911 gfc_free_actual_arglist (args
);
5915 gcc_assert (g
->specific
->pass_arg_num
> 0);
5916 gcc_assert (!g
->specific
->error
);
5917 args
= update_arglist_pass (args
, po
, g
->specific
->pass_arg_num
,
5918 g
->specific
->pass_arg
);
5920 resolve_actual_arglist (args
, target
->attr
.proc
,
5921 is_external_proc (target
)
5922 && gfc_sym_get_dummy_args (target
) == NULL
);
5924 /* Check if this arglist matches the formal. */
5925 matches
= gfc_arglist_matches_symbol (&args
, target
);
5927 /* Clean up and break out of the loop if we've found it. */
5928 gfc_free_actual_arglist (args
);
5931 e
->value
.compcall
.tbp
= g
->specific
;
5932 genname
= g
->specific_st
->name
;
5933 /* Pass along the name for CLASS methods, where the vtab
5934 procedure pointer component has to be referenced. */
5942 /* Nothing matching found! */
5943 gfc_error ("Found no matching specific binding for the call to the GENERIC"
5944 " %qs at %L", genname
, &e
->where
);
5948 /* Make sure that we have the right specific instance for the name. */
5949 derived
= get_declared_from_expr (NULL
, NULL
, e
, true);
5951 st
= gfc_find_typebound_proc (derived
, NULL
, genname
, true, &e
->where
);
5953 e
->value
.compcall
.tbp
= st
->n
.tb
;
5959 /* Resolve a call to a type-bound subroutine. */
5962 resolve_typebound_call (gfc_code
* c
, const char **name
, bool *overridable
)
5964 gfc_actual_arglist
* newactual
;
5965 gfc_symtree
* target
;
5967 /* Check that's really a SUBROUTINE. */
5968 if (!c
->expr1
->value
.compcall
.tbp
->subroutine
)
5970 gfc_error ("%qs at %L should be a SUBROUTINE",
5971 c
->expr1
->value
.compcall
.name
, &c
->loc
);
5975 if (!check_typebound_baseobject (c
->expr1
))
5978 /* Pass along the name for CLASS methods, where the vtab
5979 procedure pointer component has to be referenced. */
5981 *name
= c
->expr1
->value
.compcall
.name
;
5983 if (!resolve_typebound_generic_call (c
->expr1
, name
))
5986 /* Pass along the NON_OVERRIDABLE attribute of the specific TBP. */
5988 *overridable
= !c
->expr1
->value
.compcall
.tbp
->non_overridable
;
5990 /* Transform into an ordinary EXEC_CALL for now. */
5992 if (!resolve_typebound_static (c
->expr1
, &target
, &newactual
))
5995 c
->ext
.actual
= newactual
;
5996 c
->symtree
= target
;
5997 c
->op
= (c
->expr1
->value
.compcall
.assign
? EXEC_ASSIGN_CALL
: EXEC_CALL
);
5999 gcc_assert (!c
->expr1
->ref
&& !c
->expr1
->value
.compcall
.actual
);
6001 gfc_free_expr (c
->expr1
);
6002 c
->expr1
= gfc_get_expr ();
6003 c
->expr1
->expr_type
= EXPR_FUNCTION
;
6004 c
->expr1
->symtree
= target
;
6005 c
->expr1
->where
= c
->loc
;
6007 return resolve_call (c
);
6011 /* Resolve a component-call expression. */
6013 resolve_compcall (gfc_expr
* e
, const char **name
)
6015 gfc_actual_arglist
* newactual
;
6016 gfc_symtree
* target
;
6018 /* Check that's really a FUNCTION. */
6019 if (!e
->value
.compcall
.tbp
->function
)
6021 gfc_error ("%qs at %L should be a FUNCTION",
6022 e
->value
.compcall
.name
, &e
->where
);
6026 /* These must not be assign-calls! */
6027 gcc_assert (!e
->value
.compcall
.assign
);
6029 if (!check_typebound_baseobject (e
))
6032 /* Pass along the name for CLASS methods, where the vtab
6033 procedure pointer component has to be referenced. */
6035 *name
= e
->value
.compcall
.name
;
6037 if (!resolve_typebound_generic_call (e
, name
))
6039 gcc_assert (!e
->value
.compcall
.tbp
->is_generic
);
6041 /* Take the rank from the function's symbol. */
6042 if (e
->value
.compcall
.tbp
->u
.specific
->n
.sym
->as
)
6043 e
->rank
= e
->value
.compcall
.tbp
->u
.specific
->n
.sym
->as
->rank
;
6045 /* For now, we simply transform it into an EXPR_FUNCTION call with the same
6046 arglist to the TBP's binding target. */
6048 if (!resolve_typebound_static (e
, &target
, &newactual
))
6051 e
->value
.function
.actual
= newactual
;
6052 e
->value
.function
.name
= NULL
;
6053 e
->value
.function
.esym
= target
->n
.sym
;
6054 e
->value
.function
.isym
= NULL
;
6055 e
->symtree
= target
;
6056 e
->ts
= target
->n
.sym
->ts
;
6057 e
->expr_type
= EXPR_FUNCTION
;
6059 /* Resolution is not necessary if this is a class subroutine; this
6060 function only has to identify the specific proc. Resolution of
6061 the call will be done next in resolve_typebound_call. */
6062 return gfc_resolve_expr (e
);
6066 static bool resolve_fl_derived (gfc_symbol
*sym
);
6069 /* Resolve a typebound function, or 'method'. First separate all
6070 the non-CLASS references by calling resolve_compcall directly. */
6073 resolve_typebound_function (gfc_expr
* e
)
6075 gfc_symbol
*declared
;
6087 /* Deal with typebound operators for CLASS objects. */
6088 expr
= e
->value
.compcall
.base_object
;
6089 overridable
= !e
->value
.compcall
.tbp
->non_overridable
;
6090 if (expr
&& expr
->ts
.type
== BT_CLASS
&& e
->value
.compcall
.name
)
6092 /* If the base_object is not a variable, the corresponding actual
6093 argument expression must be stored in e->base_expression so
6094 that the corresponding tree temporary can be used as the base
6095 object in gfc_conv_procedure_call. */
6096 if (expr
->expr_type
!= EXPR_VARIABLE
)
6098 gfc_actual_arglist
*args
;
6100 for (args
= e
->value
.function
.actual
; args
; args
= args
->next
)
6102 if (expr
== args
->expr
)
6107 /* Since the typebound operators are generic, we have to ensure
6108 that any delays in resolution are corrected and that the vtab
6111 declared
= ts
.u
.derived
;
6112 c
= gfc_find_component (declared
, "_vptr", true, true, NULL
);
6113 if (c
->ts
.u
.derived
== NULL
)
6114 c
->ts
.u
.derived
= gfc_find_derived_vtab (declared
);
6116 if (!resolve_compcall (e
, &name
))
6119 /* Use the generic name if it is there. */
6120 name
= name
? name
: e
->value
.function
.esym
->name
;
6121 e
->symtree
= expr
->symtree
;
6122 e
->ref
= gfc_copy_ref (expr
->ref
);
6123 get_declared_from_expr (&class_ref
, NULL
, e
, false);
6125 /* Trim away the extraneous references that emerge from nested
6126 use of interface.c (extend_expr). */
6127 if (class_ref
&& class_ref
->next
)
6129 gfc_free_ref_list (class_ref
->next
);
6130 class_ref
->next
= NULL
;
6132 else if (e
->ref
&& !class_ref
&& expr
->ts
.type
!= BT_CLASS
)
6134 gfc_free_ref_list (e
->ref
);
6138 gfc_add_vptr_component (e
);
6139 gfc_add_component_ref (e
, name
);
6140 e
->value
.function
.esym
= NULL
;
6141 if (expr
->expr_type
!= EXPR_VARIABLE
)
6142 e
->base_expr
= expr
;
6147 return resolve_compcall (e
, NULL
);
6149 if (!resolve_ref (e
))
6152 /* Get the CLASS declared type. */
6153 declared
= get_declared_from_expr (&class_ref
, &new_ref
, e
, true);
6155 if (!resolve_fl_derived (declared
))
6158 /* Weed out cases of the ultimate component being a derived type. */
6159 if ((class_ref
&& gfc_bt_struct (class_ref
->u
.c
.component
->ts
.type
))
6160 || (!class_ref
&& st
->n
.sym
->ts
.type
!= BT_CLASS
))
6162 gfc_free_ref_list (new_ref
);
6163 return resolve_compcall (e
, NULL
);
6166 c
= gfc_find_component (declared
, "_data", true, true, NULL
);
6167 declared
= c
->ts
.u
.derived
;
6169 /* Treat the call as if it is a typebound procedure, in order to roll
6170 out the correct name for the specific function. */
6171 if (!resolve_compcall (e
, &name
))
6173 gfc_free_ref_list (new_ref
);
6180 /* Convert the expression to a procedure pointer component call. */
6181 e
->value
.function
.esym
= NULL
;
6187 /* '_vptr' points to the vtab, which contains the procedure pointers. */
6188 gfc_add_vptr_component (e
);
6189 gfc_add_component_ref (e
, name
);
6191 /* Recover the typespec for the expression. This is really only
6192 necessary for generic procedures, where the additional call
6193 to gfc_add_component_ref seems to throw the collection of the
6194 correct typespec. */
6198 gfc_free_ref_list (new_ref
);
6203 /* Resolve a typebound subroutine, or 'method'. First separate all
6204 the non-CLASS references by calling resolve_typebound_call
6208 resolve_typebound_subroutine (gfc_code
*code
)
6210 gfc_symbol
*declared
;
6220 st
= code
->expr1
->symtree
;
6222 /* Deal with typebound operators for CLASS objects. */
6223 expr
= code
->expr1
->value
.compcall
.base_object
;
6224 overridable
= !code
->expr1
->value
.compcall
.tbp
->non_overridable
;
6225 if (expr
&& expr
->ts
.type
== BT_CLASS
&& code
->expr1
->value
.compcall
.name
)
6227 /* If the base_object is not a variable, the corresponding actual
6228 argument expression must be stored in e->base_expression so
6229 that the corresponding tree temporary can be used as the base
6230 object in gfc_conv_procedure_call. */
6231 if (expr
->expr_type
!= EXPR_VARIABLE
)
6233 gfc_actual_arglist
*args
;
6235 args
= code
->expr1
->value
.function
.actual
;
6236 for (; args
; args
= args
->next
)
6237 if (expr
== args
->expr
)
6241 /* Since the typebound operators are generic, we have to ensure
6242 that any delays in resolution are corrected and that the vtab
6244 declared
= expr
->ts
.u
.derived
;
6245 c
= gfc_find_component (declared
, "_vptr", true, true, NULL
);
6246 if (c
->ts
.u
.derived
== NULL
)
6247 c
->ts
.u
.derived
= gfc_find_derived_vtab (declared
);
6249 if (!resolve_typebound_call (code
, &name
, NULL
))
6252 /* Use the generic name if it is there. */
6253 name
= name
? name
: code
->expr1
->value
.function
.esym
->name
;
6254 code
->expr1
->symtree
= expr
->symtree
;
6255 code
->expr1
->ref
= gfc_copy_ref (expr
->ref
);
6257 /* Trim away the extraneous references that emerge from nested
6258 use of interface.c (extend_expr). */
6259 get_declared_from_expr (&class_ref
, NULL
, code
->expr1
, false);
6260 if (class_ref
&& class_ref
->next
)
6262 gfc_free_ref_list (class_ref
->next
);
6263 class_ref
->next
= NULL
;
6265 else if (code
->expr1
->ref
&& !class_ref
)
6267 gfc_free_ref_list (code
->expr1
->ref
);
6268 code
->expr1
->ref
= NULL
;
6271 /* Now use the procedure in the vtable. */
6272 gfc_add_vptr_component (code
->expr1
);
6273 gfc_add_component_ref (code
->expr1
, name
);
6274 code
->expr1
->value
.function
.esym
= NULL
;
6275 if (expr
->expr_type
!= EXPR_VARIABLE
)
6276 code
->expr1
->base_expr
= expr
;
6281 return resolve_typebound_call (code
, NULL
, NULL
);
6283 if (!resolve_ref (code
->expr1
))
6286 /* Get the CLASS declared type. */
6287 get_declared_from_expr (&class_ref
, &new_ref
, code
->expr1
, true);
6289 /* Weed out cases of the ultimate component being a derived type. */
6290 if ((class_ref
&& gfc_bt_struct (class_ref
->u
.c
.component
->ts
.type
))
6291 || (!class_ref
&& st
->n
.sym
->ts
.type
!= BT_CLASS
))
6293 gfc_free_ref_list (new_ref
);
6294 return resolve_typebound_call (code
, NULL
, NULL
);
6297 if (!resolve_typebound_call (code
, &name
, &overridable
))
6299 gfc_free_ref_list (new_ref
);
6302 ts
= code
->expr1
->ts
;
6306 /* Convert the expression to a procedure pointer component call. */
6307 code
->expr1
->value
.function
.esym
= NULL
;
6308 code
->expr1
->symtree
= st
;
6311 code
->expr1
->ref
= new_ref
;
6313 /* '_vptr' points to the vtab, which contains the procedure pointers. */
6314 gfc_add_vptr_component (code
->expr1
);
6315 gfc_add_component_ref (code
->expr1
, name
);
6317 /* Recover the typespec for the expression. This is really only
6318 necessary for generic procedures, where the additional call
6319 to gfc_add_component_ref seems to throw the collection of the
6320 correct typespec. */
6321 code
->expr1
->ts
= ts
;
6324 gfc_free_ref_list (new_ref
);
6330 /* Resolve a CALL to a Procedure Pointer Component (Subroutine). */
6333 resolve_ppc_call (gfc_code
* c
)
6335 gfc_component
*comp
;
6337 comp
= gfc_get_proc_ptr_comp (c
->expr1
);
6338 gcc_assert (comp
!= NULL
);
6340 c
->resolved_sym
= c
->expr1
->symtree
->n
.sym
;
6341 c
->expr1
->expr_type
= EXPR_VARIABLE
;
6343 if (!comp
->attr
.subroutine
)
6344 gfc_add_subroutine (&comp
->attr
, comp
->name
, &c
->expr1
->where
);
6346 if (!resolve_ref (c
->expr1
))
6349 if (!update_ppc_arglist (c
->expr1
))
6352 c
->ext
.actual
= c
->expr1
->value
.compcall
.actual
;
6354 if (!resolve_actual_arglist (c
->ext
.actual
, comp
->attr
.proc
,
6355 !(comp
->ts
.interface
6356 && comp
->ts
.interface
->formal
)))
6359 if (!pure_subroutine (comp
->ts
.interface
, comp
->name
, &c
->expr1
->where
))
6362 gfc_ppc_use (comp
, &c
->expr1
->value
.compcall
.actual
, &c
->expr1
->where
);
6368 /* Resolve a Function Call to a Procedure Pointer Component (Function). */
6371 resolve_expr_ppc (gfc_expr
* e
)
6373 gfc_component
*comp
;
6375 comp
= gfc_get_proc_ptr_comp (e
);
6376 gcc_assert (comp
!= NULL
);
6378 /* Convert to EXPR_FUNCTION. */
6379 e
->expr_type
= EXPR_FUNCTION
;
6380 e
->value
.function
.isym
= NULL
;
6381 e
->value
.function
.actual
= e
->value
.compcall
.actual
;
6383 if (comp
->as
!= NULL
)
6384 e
->rank
= comp
->as
->rank
;
6386 if (!comp
->attr
.function
)
6387 gfc_add_function (&comp
->attr
, comp
->name
, &e
->where
);
6389 if (!resolve_ref (e
))
6392 if (!resolve_actual_arglist (e
->value
.function
.actual
, comp
->attr
.proc
,
6393 !(comp
->ts
.interface
6394 && comp
->ts
.interface
->formal
)))
6397 if (!update_ppc_arglist (e
))
6400 if (!check_pure_function(e
))
6403 gfc_ppc_use (comp
, &e
->value
.compcall
.actual
, &e
->where
);
6410 gfc_is_expandable_expr (gfc_expr
*e
)
6412 gfc_constructor
*con
;
6414 if (e
->expr_type
== EXPR_ARRAY
)
6416 /* Traverse the constructor looking for variables that are flavor
6417 parameter. Parameters must be expanded since they are fully used at
6419 con
= gfc_constructor_first (e
->value
.constructor
);
6420 for (; con
; con
= gfc_constructor_next (con
))
6422 if (con
->expr
->expr_type
== EXPR_VARIABLE
6423 && con
->expr
->symtree
6424 && (con
->expr
->symtree
->n
.sym
->attr
.flavor
== FL_PARAMETER
6425 || con
->expr
->symtree
->n
.sym
->attr
.flavor
== FL_VARIABLE
))
6427 if (con
->expr
->expr_type
== EXPR_ARRAY
6428 && gfc_is_expandable_expr (con
->expr
))
6437 /* Sometimes variables in specification expressions of the result
6438 of module procedures in submodules wind up not being the 'real'
6439 dummy. Find this, if possible, in the namespace of the first
6443 fixup_unique_dummy (gfc_expr
*e
)
6445 gfc_symtree
*st
= NULL
;
6446 gfc_symbol
*s
= NULL
;
6448 if (e
->symtree
->n
.sym
->ns
->proc_name
6449 && e
->symtree
->n
.sym
->ns
->proc_name
->formal
)
6450 s
= e
->symtree
->n
.sym
->ns
->proc_name
->formal
->sym
;
6453 st
= gfc_find_symtree (s
->ns
->sym_root
, e
->symtree
->n
.sym
->name
);
6456 && st
->n
.sym
!= NULL
6457 && st
->n
.sym
->attr
.dummy
)
6461 /* Resolve an expression. That is, make sure that types of operands agree
6462 with their operators, intrinsic operators are converted to function calls
6463 for overloaded types and unresolved function references are resolved. */
6466 gfc_resolve_expr (gfc_expr
*e
)
6469 bool inquiry_save
, actual_arg_save
, first_actual_arg_save
;
6474 /* inquiry_argument only applies to variables. */
6475 inquiry_save
= inquiry_argument
;
6476 actual_arg_save
= actual_arg
;
6477 first_actual_arg_save
= first_actual_arg
;
6479 if (e
->expr_type
!= EXPR_VARIABLE
)
6481 inquiry_argument
= false;
6483 first_actual_arg
= false;
6485 else if (e
->symtree
!= NULL
6486 && *e
->symtree
->name
== '@'
6487 && e
->symtree
->n
.sym
->attr
.dummy
)
6489 /* Deal with submodule specification expressions that are not
6490 found to be referenced in module.c(read_cleanup). */
6491 fixup_unique_dummy (e
);
6494 switch (e
->expr_type
)
6497 t
= resolve_operator (e
);
6503 if (check_host_association (e
))
6504 t
= resolve_function (e
);
6506 t
= resolve_variable (e
);
6508 if (e
->ts
.type
== BT_CHARACTER
&& e
->ts
.u
.cl
== NULL
&& e
->ref
6509 && e
->ref
->type
!= REF_SUBSTRING
)
6510 gfc_resolve_substring_charlen (e
);
6515 t
= resolve_typebound_function (e
);
6518 case EXPR_SUBSTRING
:
6519 t
= resolve_ref (e
);
6528 t
= resolve_expr_ppc (e
);
6533 if (!resolve_ref (e
))
6536 t
= gfc_resolve_array_constructor (e
);
6537 /* Also try to expand a constructor. */
6540 expression_rank (e
);
6541 if (gfc_is_constant_expr (e
) || gfc_is_expandable_expr (e
))
6542 gfc_expand_constructor (e
, false);
6545 /* This provides the opportunity for the length of constructors with
6546 character valued function elements to propagate the string length
6547 to the expression. */
6548 if (t
&& e
->ts
.type
== BT_CHARACTER
)
6550 /* For efficiency, we call gfc_expand_constructor for BT_CHARACTER
6551 here rather then add a duplicate test for it above. */
6552 gfc_expand_constructor (e
, false);
6553 t
= gfc_resolve_character_array_constructor (e
);
6558 case EXPR_STRUCTURE
:
6559 t
= resolve_ref (e
);
6563 t
= resolve_structure_cons (e
, 0);
6567 t
= gfc_simplify_expr (e
, 0);
6571 gfc_internal_error ("gfc_resolve_expr(): Bad expression type");
6574 if (e
->ts
.type
== BT_CHARACTER
&& t
&& !e
->ts
.u
.cl
)
6577 inquiry_argument
= inquiry_save
;
6578 actual_arg
= actual_arg_save
;
6579 first_actual_arg
= first_actual_arg_save
;
6585 /* Resolve an expression from an iterator. They must be scalar and have
6586 INTEGER or (optionally) REAL type. */
6589 gfc_resolve_iterator_expr (gfc_expr
*expr
, bool real_ok
,
6590 const char *name_msgid
)
6592 if (!gfc_resolve_expr (expr
))
6595 if (expr
->rank
!= 0)
6597 gfc_error ("%s at %L must be a scalar", _(name_msgid
), &expr
->where
);
6601 if (expr
->ts
.type
!= BT_INTEGER
)
6603 if (expr
->ts
.type
== BT_REAL
)
6606 return gfc_notify_std (GFC_STD_F95_DEL
,
6607 "%s at %L must be integer",
6608 _(name_msgid
), &expr
->where
);
6611 gfc_error ("%s at %L must be INTEGER", _(name_msgid
),
6618 gfc_error ("%s at %L must be INTEGER", _(name_msgid
), &expr
->where
);
6626 /* Resolve the expressions in an iterator structure. If REAL_OK is
6627 false allow only INTEGER type iterators, otherwise allow REAL types.
6628 Set own_scope to true for ac-implied-do and data-implied-do as those
6629 have a separate scope such that, e.g., a INTENT(IN) doesn't apply. */
6632 gfc_resolve_iterator (gfc_iterator
*iter
, bool real_ok
, bool own_scope
)
6634 if (!gfc_resolve_iterator_expr (iter
->var
, real_ok
, "Loop variable"))
6637 if (!gfc_check_vardef_context (iter
->var
, false, false, own_scope
,
6638 _("iterator variable")))
6641 if (!gfc_resolve_iterator_expr (iter
->start
, real_ok
,
6642 "Start expression in DO loop"))
6645 if (!gfc_resolve_iterator_expr (iter
->end
, real_ok
,
6646 "End expression in DO loop"))
6649 if (!gfc_resolve_iterator_expr (iter
->step
, real_ok
,
6650 "Step expression in DO loop"))
6653 if (iter
->step
->expr_type
== EXPR_CONSTANT
)
6655 if ((iter
->step
->ts
.type
== BT_INTEGER
6656 && mpz_cmp_ui (iter
->step
->value
.integer
, 0) == 0)
6657 || (iter
->step
->ts
.type
== BT_REAL
6658 && mpfr_sgn (iter
->step
->value
.real
) == 0))
6660 gfc_error ("Step expression in DO loop at %L cannot be zero",
6661 &iter
->step
->where
);
6666 /* Convert start, end, and step to the same type as var. */
6667 if (iter
->start
->ts
.kind
!= iter
->var
->ts
.kind
6668 || iter
->start
->ts
.type
!= iter
->var
->ts
.type
)
6669 gfc_convert_type (iter
->start
, &iter
->var
->ts
, 1);
6671 if (iter
->end
->ts
.kind
!= iter
->var
->ts
.kind
6672 || iter
->end
->ts
.type
!= iter
->var
->ts
.type
)
6673 gfc_convert_type (iter
->end
, &iter
->var
->ts
, 1);
6675 if (iter
->step
->ts
.kind
!= iter
->var
->ts
.kind
6676 || iter
->step
->ts
.type
!= iter
->var
->ts
.type
)
6677 gfc_convert_type (iter
->step
, &iter
->var
->ts
, 1);
6679 if (iter
->start
->expr_type
== EXPR_CONSTANT
6680 && iter
->end
->expr_type
== EXPR_CONSTANT
6681 && iter
->step
->expr_type
== EXPR_CONSTANT
)
6684 if (iter
->start
->ts
.type
== BT_INTEGER
)
6686 sgn
= mpz_cmp_ui (iter
->step
->value
.integer
, 0);
6687 cmp
= mpz_cmp (iter
->end
->value
.integer
, iter
->start
->value
.integer
);
6691 sgn
= mpfr_sgn (iter
->step
->value
.real
);
6692 cmp
= mpfr_cmp (iter
->end
->value
.real
, iter
->start
->value
.real
);
6694 if (warn_zerotrip
&& ((sgn
> 0 && cmp
< 0) || (sgn
< 0 && cmp
> 0)))
6695 gfc_warning (OPT_Wzerotrip
,
6696 "DO loop at %L will be executed zero times",
6697 &iter
->step
->where
);
6700 if (iter
->end
->expr_type
== EXPR_CONSTANT
6701 && iter
->end
->ts
.type
== BT_INTEGER
6702 && iter
->step
->expr_type
== EXPR_CONSTANT
6703 && iter
->step
->ts
.type
== BT_INTEGER
6704 && (mpz_cmp_si (iter
->step
->value
.integer
, -1L) == 0
6705 || mpz_cmp_si (iter
->step
->value
.integer
, 1L) == 0))
6707 bool is_step_positive
= mpz_cmp_ui (iter
->step
->value
.integer
, 1) == 0;
6708 int k
= gfc_validate_kind (BT_INTEGER
, iter
->end
->ts
.kind
, false);
6710 if (is_step_positive
6711 && mpz_cmp (iter
->end
->value
.integer
, gfc_integer_kinds
[k
].huge
) == 0)
6712 gfc_warning (OPT_Wundefined_do_loop
,
6713 "DO loop at %L is undefined as it overflows",
6714 &iter
->step
->where
);
6715 else if (!is_step_positive
6716 && mpz_cmp (iter
->end
->value
.integer
,
6717 gfc_integer_kinds
[k
].min_int
) == 0)
6718 gfc_warning (OPT_Wundefined_do_loop
,
6719 "DO loop at %L is undefined as it underflows",
6720 &iter
->step
->where
);
6727 /* Traversal function for find_forall_index. f == 2 signals that
6728 that variable itself is not to be checked - only the references. */
6731 forall_index (gfc_expr
*expr
, gfc_symbol
*sym
, int *f
)
6733 if (expr
->expr_type
!= EXPR_VARIABLE
)
6736 /* A scalar assignment */
6737 if (!expr
->ref
|| *f
== 1)
6739 if (expr
->symtree
->n
.sym
== sym
)
6751 /* Check whether the FORALL index appears in the expression or not.
6752 Returns true if SYM is found in EXPR. */
6755 find_forall_index (gfc_expr
*expr
, gfc_symbol
*sym
, int f
)
6757 if (gfc_traverse_expr (expr
, sym
, forall_index
, f
))
6764 /* Resolve a list of FORALL iterators. The FORALL index-name is constrained
6765 to be a scalar INTEGER variable. The subscripts and stride are scalar
6766 INTEGERs, and if stride is a constant it must be nonzero.
6767 Furthermore "A subscript or stride in a forall-triplet-spec shall
6768 not contain a reference to any index-name in the
6769 forall-triplet-spec-list in which it appears." (7.5.4.1) */
6772 resolve_forall_iterators (gfc_forall_iterator
*it
)
6774 gfc_forall_iterator
*iter
, *iter2
;
6776 for (iter
= it
; iter
; iter
= iter
->next
)
6778 if (gfc_resolve_expr (iter
->var
)
6779 && (iter
->var
->ts
.type
!= BT_INTEGER
|| iter
->var
->rank
!= 0))
6780 gfc_error ("FORALL index-name at %L must be a scalar INTEGER",
6783 if (gfc_resolve_expr (iter
->start
)
6784 && (iter
->start
->ts
.type
!= BT_INTEGER
|| iter
->start
->rank
!= 0))
6785 gfc_error ("FORALL start expression at %L must be a scalar INTEGER",
6786 &iter
->start
->where
);
6787 if (iter
->var
->ts
.kind
!= iter
->start
->ts
.kind
)
6788 gfc_convert_type (iter
->start
, &iter
->var
->ts
, 1);
6790 if (gfc_resolve_expr (iter
->end
)
6791 && (iter
->end
->ts
.type
!= BT_INTEGER
|| iter
->end
->rank
!= 0))
6792 gfc_error ("FORALL end expression at %L must be a scalar INTEGER",
6794 if (iter
->var
->ts
.kind
!= iter
->end
->ts
.kind
)
6795 gfc_convert_type (iter
->end
, &iter
->var
->ts
, 1);
6797 if (gfc_resolve_expr (iter
->stride
))
6799 if (iter
->stride
->ts
.type
!= BT_INTEGER
|| iter
->stride
->rank
!= 0)
6800 gfc_error ("FORALL stride expression at %L must be a scalar %s",
6801 &iter
->stride
->where
, "INTEGER");
6803 if (iter
->stride
->expr_type
== EXPR_CONSTANT
6804 && mpz_cmp_ui (iter
->stride
->value
.integer
, 0) == 0)
6805 gfc_error ("FORALL stride expression at %L cannot be zero",
6806 &iter
->stride
->where
);
6808 if (iter
->var
->ts
.kind
!= iter
->stride
->ts
.kind
)
6809 gfc_convert_type (iter
->stride
, &iter
->var
->ts
, 1);
6812 for (iter
= it
; iter
; iter
= iter
->next
)
6813 for (iter2
= iter
; iter2
; iter2
= iter2
->next
)
6815 if (find_forall_index (iter2
->start
, iter
->var
->symtree
->n
.sym
, 0)
6816 || find_forall_index (iter2
->end
, iter
->var
->symtree
->n
.sym
, 0)
6817 || find_forall_index (iter2
->stride
, iter
->var
->symtree
->n
.sym
, 0))
6818 gfc_error ("FORALL index %qs may not appear in triplet "
6819 "specification at %L", iter
->var
->symtree
->name
,
6820 &iter2
->start
->where
);
6825 /* Given a pointer to a symbol that is a derived type, see if it's
6826 inaccessible, i.e. if it's defined in another module and the components are
6827 PRIVATE. The search is recursive if necessary. Returns zero if no
6828 inaccessible components are found, nonzero otherwise. */
6831 derived_inaccessible (gfc_symbol
*sym
)
6835 if (sym
->attr
.use_assoc
&& sym
->attr
.private_comp
)
6838 for (c
= sym
->components
; c
; c
= c
->next
)
6840 /* Prevent an infinite loop through this function. */
6841 if (c
->ts
.type
== BT_DERIVED
&& c
->attr
.pointer
6842 && sym
== c
->ts
.u
.derived
)
6845 if (c
->ts
.type
== BT_DERIVED
&& derived_inaccessible (c
->ts
.u
.derived
))
6853 /* Resolve the argument of a deallocate expression. The expression must be
6854 a pointer or a full array. */
6857 resolve_deallocate_expr (gfc_expr
*e
)
6859 symbol_attribute attr
;
6860 int allocatable
, pointer
;
6866 if (!gfc_resolve_expr (e
))
6869 if (e
->expr_type
!= EXPR_VARIABLE
)
6872 sym
= e
->symtree
->n
.sym
;
6873 unlimited
= UNLIMITED_POLY(sym
);
6875 if (sym
->ts
.type
== BT_CLASS
)
6877 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
6878 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
6882 allocatable
= sym
->attr
.allocatable
;
6883 pointer
= sym
->attr
.pointer
;
6885 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
6890 if (ref
->u
.ar
.type
!= AR_FULL
6891 && !(ref
->u
.ar
.type
== AR_ELEMENT
&& ref
->u
.ar
.as
->rank
== 0
6892 && ref
->u
.ar
.codimen
&& gfc_ref_this_image (ref
)))
6897 c
= ref
->u
.c
.component
;
6898 if (c
->ts
.type
== BT_CLASS
)
6900 allocatable
= CLASS_DATA (c
)->attr
.allocatable
;
6901 pointer
= CLASS_DATA (c
)->attr
.class_pointer
;
6905 allocatable
= c
->attr
.allocatable
;
6906 pointer
= c
->attr
.pointer
;
6916 attr
= gfc_expr_attr (e
);
6918 if (allocatable
== 0 && attr
.pointer
== 0 && !unlimited
)
6921 gfc_error ("Allocate-object at %L must be ALLOCATABLE or a POINTER",
6927 if (gfc_is_coindexed (e
))
6929 gfc_error ("Coindexed allocatable object at %L", &e
->where
);
6934 && !gfc_check_vardef_context (e
, true, true, false,
6935 _("DEALLOCATE object")))
6937 if (!gfc_check_vardef_context (e
, false, true, false,
6938 _("DEALLOCATE object")))
6945 /* Returns true if the expression e contains a reference to the symbol sym. */
6947 sym_in_expr (gfc_expr
*e
, gfc_symbol
*sym
, int *f ATTRIBUTE_UNUSED
)
6949 if (e
->expr_type
== EXPR_VARIABLE
&& e
->symtree
->n
.sym
== sym
)
6956 gfc_find_sym_in_expr (gfc_symbol
*sym
, gfc_expr
*e
)
6958 return gfc_traverse_expr (e
, sym
, sym_in_expr
, 0);
6962 /* Given the expression node e for an allocatable/pointer of derived type to be
6963 allocated, get the expression node to be initialized afterwards (needed for
6964 derived types with default initializers, and derived types with allocatable
6965 components that need nullification.) */
6968 gfc_expr_to_initialize (gfc_expr
*e
)
6974 result
= gfc_copy_expr (e
);
6976 /* Change the last array reference from AR_ELEMENT to AR_FULL. */
6977 for (ref
= result
->ref
; ref
; ref
= ref
->next
)
6978 if (ref
->type
== REF_ARRAY
&& ref
->next
== NULL
)
6980 ref
->u
.ar
.type
= AR_FULL
;
6982 for (i
= 0; i
< ref
->u
.ar
.dimen
; i
++)
6983 ref
->u
.ar
.start
[i
] = ref
->u
.ar
.end
[i
] = ref
->u
.ar
.stride
[i
] = NULL
;
6988 gfc_free_shape (&result
->shape
, result
->rank
);
6990 /* Recalculate rank, shape, etc. */
6991 gfc_resolve_expr (result
);
6996 /* If the last ref of an expression is an array ref, return a copy of the
6997 expression with that one removed. Otherwise, a copy of the original
6998 expression. This is used for allocate-expressions and pointer assignment
6999 LHS, where there may be an array specification that needs to be stripped
7000 off when using gfc_check_vardef_context. */
7003 remove_last_array_ref (gfc_expr
* e
)
7008 e2
= gfc_copy_expr (e
);
7009 for (r
= &e2
->ref
; *r
; r
= &(*r
)->next
)
7010 if ((*r
)->type
== REF_ARRAY
&& !(*r
)->next
)
7012 gfc_free_ref_list (*r
);
7021 /* Used in resolve_allocate_expr to check that a allocation-object and
7022 a source-expr are conformable. This does not catch all possible
7023 cases; in particular a runtime checking is needed. */
7026 conformable_arrays (gfc_expr
*e1
, gfc_expr
*e2
)
7029 for (tail
= e2
->ref
; tail
&& tail
->next
; tail
= tail
->next
);
7031 /* First compare rank. */
7032 if ((tail
&& e1
->rank
!= tail
->u
.ar
.as
->rank
)
7033 || (!tail
&& e1
->rank
!= e2
->rank
))
7035 gfc_error ("Source-expr at %L must be scalar or have the "
7036 "same rank as the allocate-object at %L",
7037 &e1
->where
, &e2
->where
);
7048 for (i
= 0; i
< e1
->rank
; i
++)
7050 if (tail
->u
.ar
.start
[i
] == NULL
)
7053 if (tail
->u
.ar
.end
[i
])
7055 mpz_set (s
, tail
->u
.ar
.end
[i
]->value
.integer
);
7056 mpz_sub (s
, s
, tail
->u
.ar
.start
[i
]->value
.integer
);
7057 mpz_add_ui (s
, s
, 1);
7061 mpz_set (s
, tail
->u
.ar
.start
[i
]->value
.integer
);
7064 if (mpz_cmp (e1
->shape
[i
], s
) != 0)
7066 gfc_error ("Source-expr at %L and allocate-object at %L must "
7067 "have the same shape", &e1
->where
, &e2
->where
);
7080 /* Resolve the expression in an ALLOCATE statement, doing the additional
7081 checks to see whether the expression is OK or not. The expression must
7082 have a trailing array reference that gives the size of the array. */
7085 resolve_allocate_expr (gfc_expr
*e
, gfc_code
*code
, bool *array_alloc_wo_spec
)
7087 int i
, pointer
, allocatable
, dimension
, is_abstract
;
7091 symbol_attribute attr
;
7092 gfc_ref
*ref
, *ref2
;
7095 gfc_symbol
*sym
= NULL
;
7100 /* Mark the utmost array component as being in allocate to allow DIMEN_STAR
7101 checking of coarrays. */
7102 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
7103 if (ref
->next
== NULL
)
7106 if (ref
&& ref
->type
== REF_ARRAY
)
7107 ref
->u
.ar
.in_allocate
= true;
7109 if (!gfc_resolve_expr (e
))
7112 /* Make sure the expression is allocatable or a pointer. If it is
7113 pointer, the next-to-last reference must be a pointer. */
7117 sym
= e
->symtree
->n
.sym
;
7119 /* Check whether ultimate component is abstract and CLASS. */
7122 /* Is the allocate-object unlimited polymorphic? */
7123 unlimited
= UNLIMITED_POLY(e
);
7125 if (e
->expr_type
!= EXPR_VARIABLE
)
7128 attr
= gfc_expr_attr (e
);
7129 pointer
= attr
.pointer
;
7130 dimension
= attr
.dimension
;
7131 codimension
= attr
.codimension
;
7135 if (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
))
7137 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
7138 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
7139 dimension
= CLASS_DATA (sym
)->attr
.dimension
;
7140 codimension
= CLASS_DATA (sym
)->attr
.codimension
;
7141 is_abstract
= CLASS_DATA (sym
)->attr
.abstract
;
7145 allocatable
= sym
->attr
.allocatable
;
7146 pointer
= sym
->attr
.pointer
;
7147 dimension
= sym
->attr
.dimension
;
7148 codimension
= sym
->attr
.codimension
;
7153 for (ref
= e
->ref
; ref
; ref2
= ref
, ref
= ref
->next
)
7158 if (ref
->u
.ar
.codimen
> 0)
7161 for (n
= ref
->u
.ar
.dimen
;
7162 n
< ref
->u
.ar
.dimen
+ ref
->u
.ar
.codimen
; n
++)
7163 if (ref
->u
.ar
.dimen_type
[n
] != DIMEN_THIS_IMAGE
)
7170 if (ref
->next
!= NULL
)
7178 gfc_error ("Coindexed allocatable object at %L",
7183 c
= ref
->u
.c
.component
;
7184 if (c
->ts
.type
== BT_CLASS
)
7186 allocatable
= CLASS_DATA (c
)->attr
.allocatable
;
7187 pointer
= CLASS_DATA (c
)->attr
.class_pointer
;
7188 dimension
= CLASS_DATA (c
)->attr
.dimension
;
7189 codimension
= CLASS_DATA (c
)->attr
.codimension
;
7190 is_abstract
= CLASS_DATA (c
)->attr
.abstract
;
7194 allocatable
= c
->attr
.allocatable
;
7195 pointer
= c
->attr
.pointer
;
7196 dimension
= c
->attr
.dimension
;
7197 codimension
= c
->attr
.codimension
;
7198 is_abstract
= c
->attr
.abstract
;
7210 /* Check for F08:C628. */
7211 if (allocatable
== 0 && pointer
== 0 && !unlimited
)
7213 gfc_error ("Allocate-object at %L must be ALLOCATABLE or a POINTER",
7218 /* Some checks for the SOURCE tag. */
7221 /* Check F03:C631. */
7222 if (!gfc_type_compatible (&e
->ts
, &code
->expr3
->ts
))
7224 gfc_error ("Type of entity at %L is type incompatible with "
7225 "source-expr at %L", &e
->where
, &code
->expr3
->where
);
7229 /* Check F03:C632 and restriction following Note 6.18. */
7230 if (code
->expr3
->rank
> 0 && !conformable_arrays (code
->expr3
, e
))
7233 /* Check F03:C633. */
7234 if (code
->expr3
->ts
.kind
!= e
->ts
.kind
&& !unlimited
)
7236 gfc_error ("The allocate-object at %L and the source-expr at %L "
7237 "shall have the same kind type parameter",
7238 &e
->where
, &code
->expr3
->where
);
7242 /* Check F2008, C642. */
7243 if (code
->expr3
->ts
.type
== BT_DERIVED
7244 && ((codimension
&& gfc_expr_attr (code
->expr3
).lock_comp
)
7245 || (code
->expr3
->ts
.u
.derived
->from_intmod
7246 == INTMOD_ISO_FORTRAN_ENV
7247 && code
->expr3
->ts
.u
.derived
->intmod_sym_id
7248 == ISOFORTRAN_LOCK_TYPE
)))
7250 gfc_error ("The source-expr at %L shall neither be of type "
7251 "LOCK_TYPE nor have a LOCK_TYPE component if "
7252 "allocate-object at %L is a coarray",
7253 &code
->expr3
->where
, &e
->where
);
7257 /* Check TS18508, C702/C703. */
7258 if (code
->expr3
->ts
.type
== BT_DERIVED
7259 && ((codimension
&& gfc_expr_attr (code
->expr3
).event_comp
)
7260 || (code
->expr3
->ts
.u
.derived
->from_intmod
7261 == INTMOD_ISO_FORTRAN_ENV
7262 && code
->expr3
->ts
.u
.derived
->intmod_sym_id
7263 == ISOFORTRAN_EVENT_TYPE
)))
7265 gfc_error ("The source-expr at %L shall neither be of type "
7266 "EVENT_TYPE nor have a EVENT_TYPE component if "
7267 "allocate-object at %L is a coarray",
7268 &code
->expr3
->where
, &e
->where
);
7273 /* Check F08:C629. */
7274 if (is_abstract
&& code
->ext
.alloc
.ts
.type
== BT_UNKNOWN
7277 gcc_assert (e
->ts
.type
== BT_CLASS
);
7278 gfc_error ("Allocating %s of ABSTRACT base type at %L requires a "
7279 "type-spec or source-expr", sym
->name
, &e
->where
);
7283 /* Check F08:C632. */
7284 if (code
->ext
.alloc
.ts
.type
== BT_CHARACTER
&& !e
->ts
.deferred
7285 && !UNLIMITED_POLY (e
))
7287 int cmp
= gfc_dep_compare_expr (e
->ts
.u
.cl
->length
,
7288 code
->ext
.alloc
.ts
.u
.cl
->length
);
7289 if (cmp
== 1 || cmp
== -1 || cmp
== -3)
7291 gfc_error ("Allocating %s at %L with type-spec requires the same "
7292 "character-length parameter as in the declaration",
7293 sym
->name
, &e
->where
);
7298 /* In the variable definition context checks, gfc_expr_attr is used
7299 on the expression. This is fooled by the array specification
7300 present in e, thus we have to eliminate that one temporarily. */
7301 e2
= remove_last_array_ref (e
);
7304 t
= gfc_check_vardef_context (e2
, true, true, false,
7305 _("ALLOCATE object"));
7307 t
= gfc_check_vardef_context (e2
, false, true, false,
7308 _("ALLOCATE object"));
7313 if (e
->ts
.type
== BT_CLASS
&& CLASS_DATA (e
)->attr
.dimension
7314 && !code
->expr3
&& code
->ext
.alloc
.ts
.type
== BT_DERIVED
)
7316 /* For class arrays, the initialization with SOURCE is done
7317 using _copy and trans_call. It is convenient to exploit that
7318 when the allocated type is different from the declared type but
7319 no SOURCE exists by setting expr3. */
7320 code
->expr3
= gfc_default_initializer (&code
->ext
.alloc
.ts
);
7322 else if (flag_coarray
!= GFC_FCOARRAY_LIB
&& e
->ts
.type
== BT_DERIVED
7323 && e
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
7324 && e
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_EVENT_TYPE
)
7326 /* We have to zero initialize the integer variable. */
7327 code
->expr3
= gfc_get_int_expr (gfc_default_integer_kind
, &e
->where
, 0);
7330 if (e
->ts
.type
== BT_CLASS
&& !unlimited
&& !UNLIMITED_POLY (code
->expr3
))
7332 /* Make sure the vtab symbol is present when
7333 the module variables are generated. */
7334 gfc_typespec ts
= e
->ts
;
7336 ts
= code
->expr3
->ts
;
7337 else if (code
->ext
.alloc
.ts
.type
== BT_DERIVED
)
7338 ts
= code
->ext
.alloc
.ts
;
7340 /* Finding the vtab also publishes the type's symbol. Therefore this
7341 statement is necessary. */
7342 gfc_find_derived_vtab (ts
.u
.derived
);
7344 else if (unlimited
&& !UNLIMITED_POLY (code
->expr3
))
7346 /* Again, make sure the vtab symbol is present when
7347 the module variables are generated. */
7348 gfc_typespec
*ts
= NULL
;
7350 ts
= &code
->expr3
->ts
;
7352 ts
= &code
->ext
.alloc
.ts
;
7356 /* Finding the vtab also publishes the type's symbol. Therefore this
7357 statement is necessary. */
7361 if (dimension
== 0 && codimension
== 0)
7364 /* Make sure the last reference node is an array specification. */
7366 if (!ref2
|| ref2
->type
!= REF_ARRAY
|| ref2
->u
.ar
.type
== AR_FULL
7367 || (dimension
&& ref2
->u
.ar
.dimen
== 0))
7372 if (!gfc_notify_std (GFC_STD_F2008
, "Array specification required "
7373 "in ALLOCATE statement at %L", &e
->where
))
7375 if (code
->expr3
->rank
!= 0)
7376 *array_alloc_wo_spec
= true;
7379 gfc_error ("Array specification or array-valued SOURCE= "
7380 "expression required in ALLOCATE statement at %L",
7387 gfc_error ("Array specification required in ALLOCATE statement "
7388 "at %L", &e
->where
);
7393 /* Make sure that the array section reference makes sense in the
7394 context of an ALLOCATE specification. */
7399 for (i
= ar
->dimen
; i
< ar
->dimen
+ ar
->codimen
; i
++)
7400 if (ar
->dimen_type
[i
] == DIMEN_THIS_IMAGE
)
7402 gfc_error ("Coarray specification required in ALLOCATE statement "
7403 "at %L", &e
->where
);
7407 for (i
= 0; i
< ar
->dimen
; i
++)
7409 if (ar
->type
== AR_ELEMENT
|| ar
->type
== AR_FULL
)
7412 switch (ar
->dimen_type
[i
])
7418 if (ar
->start
[i
] != NULL
7419 && ar
->end
[i
] != NULL
7420 && ar
->stride
[i
] == NULL
)
7428 case DIMEN_THIS_IMAGE
:
7429 gfc_error ("Bad array specification in ALLOCATE statement at %L",
7435 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
7437 sym
= a
->expr
->symtree
->n
.sym
;
7439 /* TODO - check derived type components. */
7440 if (gfc_bt_struct (sym
->ts
.type
) || sym
->ts
.type
== BT_CLASS
)
7443 if ((ar
->start
[i
] != NULL
7444 && gfc_find_sym_in_expr (sym
, ar
->start
[i
]))
7445 || (ar
->end
[i
] != NULL
7446 && gfc_find_sym_in_expr (sym
, ar
->end
[i
])))
7448 gfc_error ("%qs must not appear in the array specification at "
7449 "%L in the same ALLOCATE statement where it is "
7450 "itself allocated", sym
->name
, &ar
->where
);
7456 for (i
= ar
->dimen
; i
< ar
->codimen
+ ar
->dimen
; i
++)
7458 if (ar
->dimen_type
[i
] == DIMEN_ELEMENT
7459 || ar
->dimen_type
[i
] == DIMEN_RANGE
)
7461 if (i
== (ar
->dimen
+ ar
->codimen
- 1))
7463 gfc_error ("Expected '*' in coindex specification in ALLOCATE "
7464 "statement at %L", &e
->where
);
7470 if (ar
->dimen_type
[i
] == DIMEN_STAR
&& i
== (ar
->dimen
+ ar
->codimen
- 1)
7471 && ar
->stride
[i
] == NULL
)
7474 gfc_error ("Bad coarray specification in ALLOCATE statement at %L",
7488 resolve_allocate_deallocate (gfc_code
*code
, const char *fcn
)
7490 gfc_expr
*stat
, *errmsg
, *pe
, *qe
;
7491 gfc_alloc
*a
, *p
, *q
;
7494 errmsg
= code
->expr2
;
7496 /* Check the stat variable. */
7499 gfc_check_vardef_context (stat
, false, false, false,
7500 _("STAT variable"));
7502 if ((stat
->ts
.type
!= BT_INTEGER
7503 && !(stat
->ref
&& (stat
->ref
->type
== REF_ARRAY
7504 || stat
->ref
->type
== REF_COMPONENT
)))
7506 gfc_error ("Stat-variable at %L must be a scalar INTEGER "
7507 "variable", &stat
->where
);
7509 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
7510 if (p
->expr
->symtree
->n
.sym
->name
== stat
->symtree
->n
.sym
->name
)
7512 gfc_ref
*ref1
, *ref2
;
7515 for (ref1
= p
->expr
->ref
, ref2
= stat
->ref
; ref1
&& ref2
;
7516 ref1
= ref1
->next
, ref2
= ref2
->next
)
7518 if (ref1
->type
!= REF_COMPONENT
|| ref2
->type
!= REF_COMPONENT
)
7520 if (ref1
->u
.c
.component
->name
!= ref2
->u
.c
.component
->name
)
7529 gfc_error ("Stat-variable at %L shall not be %sd within "
7530 "the same %s statement", &stat
->where
, fcn
, fcn
);
7536 /* Check the errmsg variable. */
7540 gfc_warning (0, "ERRMSG at %L is useless without a STAT tag",
7543 gfc_check_vardef_context (errmsg
, false, false, false,
7544 _("ERRMSG variable"));
7546 if ((errmsg
->ts
.type
!= BT_CHARACTER
7548 && (errmsg
->ref
->type
== REF_ARRAY
7549 || errmsg
->ref
->type
== REF_COMPONENT
)))
7550 || errmsg
->rank
> 0 )
7551 gfc_error ("Errmsg-variable at %L must be a scalar CHARACTER "
7552 "variable", &errmsg
->where
);
7554 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
7555 if (p
->expr
->symtree
->n
.sym
->name
== errmsg
->symtree
->n
.sym
->name
)
7557 gfc_ref
*ref1
, *ref2
;
7560 for (ref1
= p
->expr
->ref
, ref2
= errmsg
->ref
; ref1
&& ref2
;
7561 ref1
= ref1
->next
, ref2
= ref2
->next
)
7563 if (ref1
->type
!= REF_COMPONENT
|| ref2
->type
!= REF_COMPONENT
)
7565 if (ref1
->u
.c
.component
->name
!= ref2
->u
.c
.component
->name
)
7574 gfc_error ("Errmsg-variable at %L shall not be %sd within "
7575 "the same %s statement", &errmsg
->where
, fcn
, fcn
);
7581 /* Check that an allocate-object appears only once in the statement. */
7583 for (p
= code
->ext
.alloc
.list
; p
; p
= p
->next
)
7586 for (q
= p
->next
; q
; q
= q
->next
)
7589 if (pe
->symtree
->n
.sym
->name
== qe
->symtree
->n
.sym
->name
)
7591 /* This is a potential collision. */
7592 gfc_ref
*pr
= pe
->ref
;
7593 gfc_ref
*qr
= qe
->ref
;
7595 /* Follow the references until
7596 a) They start to differ, in which case there is no error;
7597 you can deallocate a%b and a%c in a single statement
7598 b) Both of them stop, which is an error
7599 c) One of them stops, which is also an error. */
7602 if (pr
== NULL
&& qr
== NULL
)
7604 gfc_error ("Allocate-object at %L also appears at %L",
7605 &pe
->where
, &qe
->where
);
7608 else if (pr
!= NULL
&& qr
== NULL
)
7610 gfc_error ("Allocate-object at %L is subobject of"
7611 " object at %L", &pe
->where
, &qe
->where
);
7614 else if (pr
== NULL
&& qr
!= NULL
)
7616 gfc_error ("Allocate-object at %L is subobject of"
7617 " object at %L", &qe
->where
, &pe
->where
);
7620 /* Here, pr != NULL && qr != NULL */
7621 gcc_assert(pr
->type
== qr
->type
);
7622 if (pr
->type
== REF_ARRAY
)
7624 /* Handle cases like allocate(v(3)%x(3), v(2)%x(3)),
7626 gcc_assert (qr
->type
== REF_ARRAY
);
7628 if (pr
->next
&& qr
->next
)
7631 gfc_array_ref
*par
= &(pr
->u
.ar
);
7632 gfc_array_ref
*qar
= &(qr
->u
.ar
);
7634 for (i
=0; i
<par
->dimen
; i
++)
7636 if ((par
->start
[i
] != NULL
7637 || qar
->start
[i
] != NULL
)
7638 && gfc_dep_compare_expr (par
->start
[i
],
7639 qar
->start
[i
]) != 0)
7646 if (pr
->u
.c
.component
->name
!= qr
->u
.c
.component
->name
)
7659 if (strcmp (fcn
, "ALLOCATE") == 0)
7661 bool arr_alloc_wo_spec
= false;
7663 /* Resolving the expr3 in the loop over all objects to allocate would
7664 execute loop invariant code for each loop item. Therefore do it just
7666 if (code
->expr3
&& code
->expr3
->mold
7667 && code
->expr3
->ts
.type
== BT_DERIVED
)
7669 /* Default initialization via MOLD (non-polymorphic). */
7670 gfc_expr
*rhs
= gfc_default_initializer (&code
->expr3
->ts
);
7673 gfc_resolve_expr (rhs
);
7674 gfc_free_expr (code
->expr3
);
7678 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
7679 resolve_allocate_expr (a
->expr
, code
, &arr_alloc_wo_spec
);
7681 if (arr_alloc_wo_spec
&& code
->expr3
)
7683 /* Mark the allocate to have to take the array specification
7685 code
->ext
.alloc
.arr_spec_from_expr3
= 1;
7690 for (a
= code
->ext
.alloc
.list
; a
; a
= a
->next
)
7691 resolve_deallocate_expr (a
->expr
);
7696 /************ SELECT CASE resolution subroutines ************/
7698 /* Callback function for our mergesort variant. Determines interval
7699 overlaps for CASEs. Return <0 if op1 < op2, 0 for overlap, >0 for
7700 op1 > op2. Assumes we're not dealing with the default case.
7701 We have op1 = (:L), (K:L) or (K:) and op2 = (:N), (M:N) or (M:).
7702 There are nine situations to check. */
7705 compare_cases (const gfc_case
*op1
, const gfc_case
*op2
)
7709 if (op1
->low
== NULL
) /* op1 = (:L) */
7711 /* op2 = (:N), so overlap. */
7713 /* op2 = (M:) or (M:N), L < M */
7714 if (op2
->low
!= NULL
7715 && gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
7718 else if (op1
->high
== NULL
) /* op1 = (K:) */
7720 /* op2 = (M:), so overlap. */
7722 /* op2 = (:N) or (M:N), K > N */
7723 if (op2
->high
!= NULL
7724 && gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
7727 else /* op1 = (K:L) */
7729 if (op2
->low
== NULL
) /* op2 = (:N), K > N */
7730 retval
= (gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
7732 else if (op2
->high
== NULL
) /* op2 = (M:), L < M */
7733 retval
= (gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
7735 else /* op2 = (M:N) */
7739 if (gfc_compare_expr (op1
->high
, op2
->low
, INTRINSIC_LT
) < 0)
7742 else if (gfc_compare_expr (op1
->low
, op2
->high
, INTRINSIC_GT
) > 0)
7751 /* Merge-sort a double linked case list, detecting overlap in the
7752 process. LIST is the head of the double linked case list before it
7753 is sorted. Returns the head of the sorted list if we don't see any
7754 overlap, or NULL otherwise. */
7757 check_case_overlap (gfc_case
*list
)
7759 gfc_case
*p
, *q
, *e
, *tail
;
7760 int insize
, nmerges
, psize
, qsize
, cmp
, overlap_seen
;
7762 /* If the passed list was empty, return immediately. */
7769 /* Loop unconditionally. The only exit from this loop is a return
7770 statement, when we've finished sorting the case list. */
7777 /* Count the number of merges we do in this pass. */
7780 /* Loop while there exists a merge to be done. */
7785 /* Count this merge. */
7788 /* Cut the list in two pieces by stepping INSIZE places
7789 forward in the list, starting from P. */
7792 for (i
= 0; i
< insize
; i
++)
7801 /* Now we have two lists. Merge them! */
7802 while (psize
> 0 || (qsize
> 0 && q
!= NULL
))
7804 /* See from which the next case to merge comes from. */
7807 /* P is empty so the next case must come from Q. */
7812 else if (qsize
== 0 || q
== NULL
)
7821 cmp
= compare_cases (p
, q
);
7824 /* The whole case range for P is less than the
7832 /* The whole case range for Q is greater than
7833 the case range for P. */
7840 /* The cases overlap, or they are the same
7841 element in the list. Either way, we must
7842 issue an error and get the next case from P. */
7843 /* FIXME: Sort P and Q by line number. */
7844 gfc_error ("CASE label at %L overlaps with CASE "
7845 "label at %L", &p
->where
, &q
->where
);
7853 /* Add the next element to the merged list. */
7862 /* P has now stepped INSIZE places along, and so has Q. So
7863 they're the same. */
7868 /* If we have done only one merge or none at all, we've
7869 finished sorting the cases. */
7878 /* Otherwise repeat, merging lists twice the size. */
7884 /* Check to see if an expression is suitable for use in a CASE statement.
7885 Makes sure that all case expressions are scalar constants of the same
7886 type. Return false if anything is wrong. */
7889 validate_case_label_expr (gfc_expr
*e
, gfc_expr
*case_expr
)
7891 if (e
== NULL
) return true;
7893 if (e
->ts
.type
!= case_expr
->ts
.type
)
7895 gfc_error ("Expression in CASE statement at %L must be of type %s",
7896 &e
->where
, gfc_basic_typename (case_expr
->ts
.type
));
7900 /* C805 (R808) For a given case-construct, each case-value shall be of
7901 the same type as case-expr. For character type, length differences
7902 are allowed, but the kind type parameters shall be the same. */
7904 if (case_expr
->ts
.type
== BT_CHARACTER
&& e
->ts
.kind
!= case_expr
->ts
.kind
)
7906 gfc_error ("Expression in CASE statement at %L must be of kind %d",
7907 &e
->where
, case_expr
->ts
.kind
);
7911 /* Convert the case value kind to that of case expression kind,
7914 if (e
->ts
.kind
!= case_expr
->ts
.kind
)
7915 gfc_convert_type_warn (e
, &case_expr
->ts
, 2, 0);
7919 gfc_error ("Expression in CASE statement at %L must be scalar",
7928 /* Given a completely parsed select statement, we:
7930 - Validate all expressions and code within the SELECT.
7931 - Make sure that the selection expression is not of the wrong type.
7932 - Make sure that no case ranges overlap.
7933 - Eliminate unreachable cases and unreachable code resulting from
7934 removing case labels.
7936 The standard does allow unreachable cases, e.g. CASE (5:3). But
7937 they are a hassle for code generation, and to prevent that, we just
7938 cut them out here. This is not necessary for overlapping cases
7939 because they are illegal and we never even try to generate code.
7941 We have the additional caveat that a SELECT construct could have
7942 been a computed GOTO in the source code. Fortunately we can fairly
7943 easily work around that here: The case_expr for a "real" SELECT CASE
7944 is in code->expr1, but for a computed GOTO it is in code->expr2. All
7945 we have to do is make sure that the case_expr is a scalar integer
7949 resolve_select (gfc_code
*code
, bool select_type
)
7952 gfc_expr
*case_expr
;
7953 gfc_case
*cp
, *default_case
, *tail
, *head
;
7954 int seen_unreachable
;
7960 if (code
->expr1
== NULL
)
7962 /* This was actually a computed GOTO statement. */
7963 case_expr
= code
->expr2
;
7964 if (case_expr
->ts
.type
!= BT_INTEGER
|| case_expr
->rank
!= 0)
7965 gfc_error ("Selection expression in computed GOTO statement "
7966 "at %L must be a scalar integer expression",
7969 /* Further checking is not necessary because this SELECT was built
7970 by the compiler, so it should always be OK. Just move the
7971 case_expr from expr2 to expr so that we can handle computed
7972 GOTOs as normal SELECTs from here on. */
7973 code
->expr1
= code
->expr2
;
7978 case_expr
= code
->expr1
;
7979 type
= case_expr
->ts
.type
;
7982 if (type
!= BT_LOGICAL
&& type
!= BT_INTEGER
&& type
!= BT_CHARACTER
)
7984 gfc_error ("Argument of SELECT statement at %L cannot be %s",
7985 &case_expr
->where
, gfc_typename (&case_expr
->ts
));
7987 /* Punt. Going on here just produce more garbage error messages. */
7992 if (!select_type
&& case_expr
->rank
!= 0)
7994 gfc_error ("Argument of SELECT statement at %L must be a scalar "
7995 "expression", &case_expr
->where
);
8001 /* Raise a warning if an INTEGER case value exceeds the range of
8002 the case-expr. Later, all expressions will be promoted to the
8003 largest kind of all case-labels. */
8005 if (type
== BT_INTEGER
)
8006 for (body
= code
->block
; body
; body
= body
->block
)
8007 for (cp
= body
->ext
.block
.case_list
; cp
; cp
= cp
->next
)
8010 && gfc_check_integer_range (cp
->low
->value
.integer
,
8011 case_expr
->ts
.kind
) != ARITH_OK
)
8012 gfc_warning (0, "Expression in CASE statement at %L is "
8013 "not in the range of %s", &cp
->low
->where
,
8014 gfc_typename (&case_expr
->ts
));
8017 && cp
->low
!= cp
->high
8018 && gfc_check_integer_range (cp
->high
->value
.integer
,
8019 case_expr
->ts
.kind
) != ARITH_OK
)
8020 gfc_warning (0, "Expression in CASE statement at %L is "
8021 "not in the range of %s", &cp
->high
->where
,
8022 gfc_typename (&case_expr
->ts
));
8025 /* PR 19168 has a long discussion concerning a mismatch of the kinds
8026 of the SELECT CASE expression and its CASE values. Walk the lists
8027 of case values, and if we find a mismatch, promote case_expr to
8028 the appropriate kind. */
8030 if (type
== BT_LOGICAL
|| type
== BT_INTEGER
)
8032 for (body
= code
->block
; body
; body
= body
->block
)
8034 /* Walk the case label list. */
8035 for (cp
= body
->ext
.block
.case_list
; cp
; cp
= cp
->next
)
8037 /* Intercept the DEFAULT case. It does not have a kind. */
8038 if (cp
->low
== NULL
&& cp
->high
== NULL
)
8041 /* Unreachable case ranges are discarded, so ignore. */
8042 if (cp
->low
!= NULL
&& cp
->high
!= NULL
8043 && cp
->low
!= cp
->high
8044 && gfc_compare_expr (cp
->low
, cp
->high
, INTRINSIC_GT
) > 0)
8048 && case_expr
->ts
.kind
!= gfc_kind_max(case_expr
, cp
->low
))
8049 gfc_convert_type_warn (case_expr
, &cp
->low
->ts
, 2, 0);
8051 if (cp
->high
!= NULL
8052 && case_expr
->ts
.kind
!= gfc_kind_max(case_expr
, cp
->high
))
8053 gfc_convert_type_warn (case_expr
, &cp
->high
->ts
, 2, 0);
8058 /* Assume there is no DEFAULT case. */
8059 default_case
= NULL
;
8064 for (body
= code
->block
; body
; body
= body
->block
)
8066 /* Assume the CASE list is OK, and all CASE labels can be matched. */
8068 seen_unreachable
= 0;
8070 /* Walk the case label list, making sure that all case labels
8072 for (cp
= body
->ext
.block
.case_list
; cp
; cp
= cp
->next
)
8074 /* Count the number of cases in the whole construct. */
8077 /* Intercept the DEFAULT case. */
8078 if (cp
->low
== NULL
&& cp
->high
== NULL
)
8080 if (default_case
!= NULL
)
8082 gfc_error ("The DEFAULT CASE at %L cannot be followed "
8083 "by a second DEFAULT CASE at %L",
8084 &default_case
->where
, &cp
->where
);
8095 /* Deal with single value cases and case ranges. Errors are
8096 issued from the validation function. */
8097 if (!validate_case_label_expr (cp
->low
, case_expr
)
8098 || !validate_case_label_expr (cp
->high
, case_expr
))
8104 if (type
== BT_LOGICAL
8105 && ((cp
->low
== NULL
|| cp
->high
== NULL
)
8106 || cp
->low
!= cp
->high
))
8108 gfc_error ("Logical range in CASE statement at %L is not "
8109 "allowed", &cp
->low
->where
);
8114 if (type
== BT_LOGICAL
&& cp
->low
->expr_type
== EXPR_CONSTANT
)
8117 value
= cp
->low
->value
.logical
== 0 ? 2 : 1;
8118 if (value
& seen_logical
)
8120 gfc_error ("Constant logical value in CASE statement "
8121 "is repeated at %L",
8126 seen_logical
|= value
;
8129 if (cp
->low
!= NULL
&& cp
->high
!= NULL
8130 && cp
->low
!= cp
->high
8131 && gfc_compare_expr (cp
->low
, cp
->high
, INTRINSIC_GT
) > 0)
8133 if (warn_surprising
)
8134 gfc_warning (OPT_Wsurprising
,
8135 "Range specification at %L can never be matched",
8138 cp
->unreachable
= 1;
8139 seen_unreachable
= 1;
8143 /* If the case range can be matched, it can also overlap with
8144 other cases. To make sure it does not, we put it in a
8145 double linked list here. We sort that with a merge sort
8146 later on to detect any overlapping cases. */
8150 head
->right
= head
->left
= NULL
;
8155 tail
->right
->left
= tail
;
8162 /* It there was a failure in the previous case label, give up
8163 for this case label list. Continue with the next block. */
8167 /* See if any case labels that are unreachable have been seen.
8168 If so, we eliminate them. This is a bit of a kludge because
8169 the case lists for a single case statement (label) is a
8170 single forward linked lists. */
8171 if (seen_unreachable
)
8173 /* Advance until the first case in the list is reachable. */
8174 while (body
->ext
.block
.case_list
!= NULL
8175 && body
->ext
.block
.case_list
->unreachable
)
8177 gfc_case
*n
= body
->ext
.block
.case_list
;
8178 body
->ext
.block
.case_list
= body
->ext
.block
.case_list
->next
;
8180 gfc_free_case_list (n
);
8183 /* Strip all other unreachable cases. */
8184 if (body
->ext
.block
.case_list
)
8186 for (cp
= body
->ext
.block
.case_list
; cp
&& cp
->next
; cp
= cp
->next
)
8188 if (cp
->next
->unreachable
)
8190 gfc_case
*n
= cp
->next
;
8191 cp
->next
= cp
->next
->next
;
8193 gfc_free_case_list (n
);
8200 /* See if there were overlapping cases. If the check returns NULL,
8201 there was overlap. In that case we don't do anything. If head
8202 is non-NULL, we prepend the DEFAULT case. The sorted list can
8203 then used during code generation for SELECT CASE constructs with
8204 a case expression of a CHARACTER type. */
8207 head
= check_case_overlap (head
);
8209 /* Prepend the default_case if it is there. */
8210 if (head
!= NULL
&& default_case
)
8212 default_case
->left
= NULL
;
8213 default_case
->right
= head
;
8214 head
->left
= default_case
;
8218 /* Eliminate dead blocks that may be the result if we've seen
8219 unreachable case labels for a block. */
8220 for (body
= code
; body
&& body
->block
; body
= body
->block
)
8222 if (body
->block
->ext
.block
.case_list
== NULL
)
8224 /* Cut the unreachable block from the code chain. */
8225 gfc_code
*c
= body
->block
;
8226 body
->block
= c
->block
;
8228 /* Kill the dead block, but not the blocks below it. */
8230 gfc_free_statements (c
);
8234 /* More than two cases is legal but insane for logical selects.
8235 Issue a warning for it. */
8236 if (warn_surprising
&& type
== BT_LOGICAL
&& ncases
> 2)
8237 gfc_warning (OPT_Wsurprising
,
8238 "Logical SELECT CASE block at %L has more that two cases",
8243 /* Check if a derived type is extensible. */
8246 gfc_type_is_extensible (gfc_symbol
*sym
)
8248 return !(sym
->attr
.is_bind_c
|| sym
->attr
.sequence
8249 || (sym
->attr
.is_class
8250 && sym
->components
->ts
.u
.derived
->attr
.unlimited_polymorphic
));
8255 resolve_types (gfc_namespace
*ns
);
8257 /* Resolve an associate-name: Resolve target and ensure the type-spec is
8258 correct as well as possibly the array-spec. */
8261 resolve_assoc_var (gfc_symbol
* sym
, bool resolve_target
)
8265 gcc_assert (sym
->assoc
);
8266 gcc_assert (sym
->attr
.flavor
== FL_VARIABLE
);
8268 /* If this is for SELECT TYPE, the target may not yet be set. In that
8269 case, return. Resolution will be called later manually again when
8271 target
= sym
->assoc
->target
;
8274 gcc_assert (!sym
->assoc
->dangling
);
8276 if (resolve_target
&& !gfc_resolve_expr (target
))
8279 /* For variable targets, we get some attributes from the target. */
8280 if (target
->expr_type
== EXPR_VARIABLE
)
8284 gcc_assert (target
->symtree
);
8285 tsym
= target
->symtree
->n
.sym
;
8287 sym
->attr
.asynchronous
= tsym
->attr
.asynchronous
;
8288 sym
->attr
.volatile_
= tsym
->attr
.volatile_
;
8290 sym
->attr
.target
= tsym
->attr
.target
8291 || gfc_expr_attr (target
).pointer
;
8292 if (is_subref_array (target
))
8293 sym
->attr
.subref_array_pointer
= 1;
8296 /* Get type if this was not already set. Note that it can be
8297 some other type than the target in case this is a SELECT TYPE
8298 selector! So we must not update when the type is already there. */
8299 if (sym
->ts
.type
== BT_UNKNOWN
)
8300 sym
->ts
= target
->ts
;
8301 gcc_assert (sym
->ts
.type
!= BT_UNKNOWN
);
8303 /* See if this is a valid association-to-variable. */
8304 sym
->assoc
->variable
= (target
->expr_type
== EXPR_VARIABLE
8305 && !gfc_has_vector_subscript (target
));
8307 /* Finally resolve if this is an array or not. */
8308 if (sym
->attr
.dimension
&& target
->rank
== 0)
8310 /* primary.c makes the assumption that a reference to an associate
8311 name followed by a left parenthesis is an array reference. */
8312 if (sym
->ts
.type
!= BT_CHARACTER
)
8313 gfc_error ("Associate-name %qs at %L is used as array",
8314 sym
->name
, &sym
->declared_at
);
8315 sym
->attr
.dimension
= 0;
8320 /* We cannot deal with class selectors that need temporaries. */
8321 if (target
->ts
.type
== BT_CLASS
8322 && gfc_ref_needs_temporary_p (target
->ref
))
8324 gfc_error ("CLASS selector at %L needs a temporary which is not "
8325 "yet implemented", &target
->where
);
8329 if (target
->ts
.type
== BT_CLASS
)
8330 gfc_fix_class_refs (target
);
8332 if (target
->rank
!= 0)
8335 /* The rank may be incorrectly guessed at parsing, therefore make sure
8336 it is corrected now. */
8337 if (sym
->ts
.type
!= BT_CLASS
&& (!sym
->as
|| sym
->assoc
->rankguessed
))
8340 sym
->as
= gfc_get_array_spec ();
8342 as
->rank
= target
->rank
;
8343 as
->type
= AS_DEFERRED
;
8344 as
->corank
= gfc_get_corank (target
);
8345 sym
->attr
.dimension
= 1;
8346 if (as
->corank
!= 0)
8347 sym
->attr
.codimension
= 1;
8352 /* target's rank is 0, but the type of the sym is still array valued,
8353 which has to be corrected. */
8354 if (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)->as
)
8357 symbol_attribute attr
;
8358 /* The associated variable's type is still the array type
8359 correct this now. */
8360 gfc_typespec
*ts
= &target
->ts
;
8363 for (ref
= target
->ref
; ref
!= NULL
; ref
= ref
->next
)
8368 ts
= &ref
->u
.c
.component
->ts
;
8371 if (ts
->type
== BT_CLASS
)
8372 ts
= &ts
->u
.derived
->components
->ts
;
8378 /* Create a scalar instance of the current class type. Because the
8379 rank of a class array goes into its name, the type has to be
8380 rebuild. The alternative of (re-)setting just the attributes
8381 and as in the current type, destroys the type also in other
8385 sym
->ts
.type
= BT_CLASS
;
8386 attr
= CLASS_DATA (sym
)->attr
;
8388 attr
.associate_var
= 1;
8389 attr
.dimension
= attr
.codimension
= 0;
8390 attr
.class_pointer
= 1;
8391 if (!gfc_build_class_symbol (&sym
->ts
, &attr
, &as
))
8393 /* Make sure the _vptr is set. */
8394 c
= gfc_find_component (sym
->ts
.u
.derived
, "_vptr", true, true, NULL
);
8395 if (c
->ts
.u
.derived
== NULL
)
8396 c
->ts
.u
.derived
= gfc_find_derived_vtab (sym
->ts
.u
.derived
);
8397 CLASS_DATA (sym
)->attr
.pointer
= 1;
8398 CLASS_DATA (sym
)->attr
.class_pointer
= 1;
8399 gfc_set_sym_referenced (sym
->ts
.u
.derived
);
8400 gfc_commit_symbol (sym
->ts
.u
.derived
);
8401 /* _vptr now has the _vtab in it, change it to the _vtype. */
8402 if (c
->ts
.u
.derived
->attr
.vtab
)
8403 c
->ts
.u
.derived
= c
->ts
.u
.derived
->ts
.u
.derived
;
8404 c
->ts
.u
.derived
->ns
->types_resolved
= 0;
8405 resolve_types (c
->ts
.u
.derived
->ns
);
8409 /* Mark this as an associate variable. */
8410 sym
->attr
.associate_var
= 1;
8412 /* Fix up the type-spec for CHARACTER types. */
8413 if (sym
->ts
.type
== BT_CHARACTER
&& !sym
->attr
.select_type_temporary
)
8416 sym
->ts
.u
.cl
= target
->ts
.u
.cl
;
8418 if (!sym
->ts
.u
.cl
->length
)
8419 sym
->ts
.u
.cl
->length
8420 = gfc_get_int_expr (gfc_default_integer_kind
,
8421 NULL
, target
->value
.character
.length
);
8424 /* If the target is a good class object, so is the associate variable. */
8425 if (sym
->ts
.type
== BT_CLASS
&& gfc_expr_attr (target
).class_ok
)
8426 sym
->attr
.class_ok
= 1;
8430 /* Ensure that SELECT TYPE expressions have the correct rank and a full
8431 array reference, where necessary. The symbols are artificial and so
8432 the dimension attribute and arrayspec can also be set. In addition,
8433 sometimes the expr1 arrives as BT_DERIVED, when the symbol is BT_CLASS.
8434 This is corrected here as well.*/
8437 fixup_array_ref (gfc_expr
**expr1
, gfc_expr
*expr2
,
8438 int rank
, gfc_ref
*ref
)
8440 gfc_ref
*nref
= (*expr1
)->ref
;
8441 gfc_symbol
*sym1
= (*expr1
)->symtree
->n
.sym
;
8442 gfc_symbol
*sym2
= expr2
? expr2
->symtree
->n
.sym
: NULL
;
8443 (*expr1
)->rank
= rank
;
8444 if (sym1
->ts
.type
== BT_CLASS
)
8446 if ((*expr1
)->ts
.type
!= BT_CLASS
)
8447 (*expr1
)->ts
= sym1
->ts
;
8449 CLASS_DATA (sym1
)->attr
.dimension
= 1;
8450 if (CLASS_DATA (sym1
)->as
== NULL
&& sym2
)
8451 CLASS_DATA (sym1
)->as
8452 = gfc_copy_array_spec (CLASS_DATA (sym2
)->as
);
8456 sym1
->attr
.dimension
= 1;
8457 if (sym1
->as
== NULL
&& sym2
)
8458 sym1
->as
= gfc_copy_array_spec (sym2
->as
);
8461 for (; nref
; nref
= nref
->next
)
8462 if (nref
->next
== NULL
)
8465 if (ref
&& nref
&& nref
->type
!= REF_ARRAY
)
8466 nref
->next
= gfc_copy_ref (ref
);
8467 else if (ref
&& !nref
)
8468 (*expr1
)->ref
= gfc_copy_ref (ref
);
8473 build_loc_call (gfc_expr
*sym_expr
)
8476 loc_call
= gfc_get_expr ();
8477 loc_call
->expr_type
= EXPR_FUNCTION
;
8478 gfc_get_sym_tree ("loc", gfc_current_ns
, &loc_call
->symtree
, false);
8479 loc_call
->symtree
->n
.sym
->attr
.flavor
= FL_PROCEDURE
;
8480 loc_call
->symtree
->n
.sym
->attr
.intrinsic
= 1;
8481 loc_call
->symtree
->n
.sym
->result
= loc_call
->symtree
->n
.sym
;
8482 gfc_commit_symbol (loc_call
->symtree
->n
.sym
);
8483 loc_call
->ts
.type
= BT_INTEGER
;
8484 loc_call
->ts
.kind
= gfc_index_integer_kind
;
8485 loc_call
->value
.function
.isym
= gfc_intrinsic_function_by_id (GFC_ISYM_LOC
);
8486 loc_call
->value
.function
.actual
= gfc_get_actual_arglist ();
8487 loc_call
->value
.function
.actual
->expr
= sym_expr
;
8488 loc_call
->where
= sym_expr
->where
;
8492 /* Resolve a SELECT TYPE statement. */
8495 resolve_select_type (gfc_code
*code
, gfc_namespace
*old_ns
)
8497 gfc_symbol
*selector_type
;
8498 gfc_code
*body
, *new_st
, *if_st
, *tail
;
8499 gfc_code
*class_is
= NULL
, *default_case
= NULL
;
8502 char name
[GFC_MAX_SYMBOL_LEN
];
8507 gfc_ref
* ref
= NULL
;
8508 gfc_expr
*selector_expr
= NULL
;
8510 ns
= code
->ext
.block
.ns
;
8513 /* Check for F03:C813. */
8514 if (code
->expr1
->ts
.type
!= BT_CLASS
8515 && !(code
->expr2
&& code
->expr2
->ts
.type
== BT_CLASS
))
8517 gfc_error ("Selector shall be polymorphic in SELECT TYPE statement "
8518 "at %L", &code
->loc
);
8522 if (!code
->expr1
->symtree
->n
.sym
->attr
.class_ok
)
8527 if (code
->expr1
->symtree
->n
.sym
->attr
.untyped
)
8528 code
->expr1
->symtree
->n
.sym
->ts
= code
->expr2
->ts
;
8529 selector_type
= CLASS_DATA (code
->expr2
)->ts
.u
.derived
;
8531 /* F2008: C803 The selector expression must not be coindexed. */
8532 if (gfc_is_coindexed (code
->expr2
))
8534 gfc_error ("Selector at %L must not be coindexed",
8535 &code
->expr2
->where
);
8542 selector_type
= CLASS_DATA (code
->expr1
)->ts
.u
.derived
;
8544 if (gfc_is_coindexed (code
->expr1
))
8546 gfc_error ("Selector at %L must not be coindexed",
8547 &code
->expr1
->where
);
8552 /* Loop over TYPE IS / CLASS IS cases. */
8553 for (body
= code
->block
; body
; body
= body
->block
)
8555 c
= body
->ext
.block
.case_list
;
8559 /* Check for repeated cases. */
8560 for (tail
= code
->block
; tail
; tail
= tail
->block
)
8562 gfc_case
*d
= tail
->ext
.block
.case_list
;
8566 if (c
->ts
.type
== d
->ts
.type
8567 && ((c
->ts
.type
== BT_DERIVED
8568 && c
->ts
.u
.derived
&& d
->ts
.u
.derived
8569 && !strcmp (c
->ts
.u
.derived
->name
,
8570 d
->ts
.u
.derived
->name
))
8571 || c
->ts
.type
== BT_UNKNOWN
8572 || (!(c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
8573 && c
->ts
.kind
== d
->ts
.kind
)))
8575 gfc_error ("TYPE IS at %L overlaps with TYPE IS at %L",
8576 &c
->where
, &d
->where
);
8582 /* Check F03:C815. */
8583 if ((c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
8584 && !selector_type
->attr
.unlimited_polymorphic
8585 && !gfc_type_is_extensible (c
->ts
.u
.derived
))
8587 gfc_error ("Derived type %qs at %L must be extensible",
8588 c
->ts
.u
.derived
->name
, &c
->where
);
8593 /* Check F03:C816. */
8594 if (c
->ts
.type
!= BT_UNKNOWN
&& !selector_type
->attr
.unlimited_polymorphic
8595 && ((c
->ts
.type
!= BT_DERIVED
&& c
->ts
.type
!= BT_CLASS
)
8596 || !gfc_type_is_extension_of (selector_type
, c
->ts
.u
.derived
)))
8598 if (c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
8599 gfc_error ("Derived type %qs at %L must be an extension of %qs",
8600 c
->ts
.u
.derived
->name
, &c
->where
, selector_type
->name
);
8602 gfc_error ("Unexpected intrinsic type %qs at %L",
8603 gfc_basic_typename (c
->ts
.type
), &c
->where
);
8608 /* Check F03:C814. */
8609 if (c
->ts
.type
== BT_CHARACTER
8610 && (c
->ts
.u
.cl
->length
!= NULL
|| c
->ts
.deferred
))
8612 gfc_error ("The type-spec at %L shall specify that each length "
8613 "type parameter is assumed", &c
->where
);
8618 /* Intercept the DEFAULT case. */
8619 if (c
->ts
.type
== BT_UNKNOWN
)
8621 /* Check F03:C818. */
8624 gfc_error ("The DEFAULT CASE at %L cannot be followed "
8625 "by a second DEFAULT CASE at %L",
8626 &default_case
->ext
.block
.case_list
->where
, &c
->where
);
8631 default_case
= body
;
8638 /* Transform SELECT TYPE statement to BLOCK and associate selector to
8639 target if present. If there are any EXIT statements referring to the
8640 SELECT TYPE construct, this is no problem because the gfc_code
8641 reference stays the same and EXIT is equally possible from the BLOCK
8642 it is changed to. */
8643 code
->op
= EXEC_BLOCK
;
8646 gfc_association_list
* assoc
;
8648 assoc
= gfc_get_association_list ();
8649 assoc
->st
= code
->expr1
->symtree
;
8650 assoc
->target
= gfc_copy_expr (code
->expr2
);
8651 assoc
->target
->where
= code
->expr2
->where
;
8652 /* assoc->variable will be set by resolve_assoc_var. */
8654 code
->ext
.block
.assoc
= assoc
;
8655 code
->expr1
->symtree
->n
.sym
->assoc
= assoc
;
8657 resolve_assoc_var (code
->expr1
->symtree
->n
.sym
, false);
8660 code
->ext
.block
.assoc
= NULL
;
8662 /* Ensure that the selector rank and arrayspec are available to
8663 correct expressions in which they might be missing. */
8664 if (code
->expr2
&& code
->expr2
->rank
)
8666 rank
= code
->expr2
->rank
;
8667 for (ref
= code
->expr2
->ref
; ref
; ref
= ref
->next
)
8668 if (ref
->next
== NULL
)
8670 if (ref
&& ref
->type
== REF_ARRAY
)
8671 ref
= gfc_copy_ref (ref
);
8673 /* Fixup expr1 if necessary. */
8675 fixup_array_ref (&code
->expr1
, code
->expr2
, rank
, ref
);
8677 else if (code
->expr1
->rank
)
8679 rank
= code
->expr1
->rank
;
8680 for (ref
= code
->expr1
->ref
; ref
; ref
= ref
->next
)
8681 if (ref
->next
== NULL
)
8683 if (ref
&& ref
->type
== REF_ARRAY
)
8684 ref
= gfc_copy_ref (ref
);
8687 /* Add EXEC_SELECT to switch on type. */
8688 new_st
= gfc_get_code (code
->op
);
8689 new_st
->expr1
= code
->expr1
;
8690 new_st
->expr2
= code
->expr2
;
8691 new_st
->block
= code
->block
;
8692 code
->expr1
= code
->expr2
= NULL
;
8697 ns
->code
->next
= new_st
;
8699 code
->op
= EXEC_SELECT_TYPE
;
8701 /* Use the intrinsic LOC function to generate an integer expression
8702 for the vtable of the selector. Note that the rank of the selector
8703 expression has to be set to zero. */
8704 gfc_add_vptr_component (code
->expr1
);
8705 code
->expr1
->rank
= 0;
8706 code
->expr1
= build_loc_call (code
->expr1
);
8707 selector_expr
= code
->expr1
->value
.function
.actual
->expr
;
8709 /* Loop over TYPE IS / CLASS IS cases. */
8710 for (body
= code
->block
; body
; body
= body
->block
)
8714 c
= body
->ext
.block
.case_list
;
8716 /* Generate an index integer expression for address of the
8717 TYPE/CLASS vtable and store it in c->low. The hash expression
8718 is stored in c->high and is used to resolve intrinsic cases. */
8719 if (c
->ts
.type
!= BT_UNKNOWN
)
8721 if (c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
8723 vtab
= gfc_find_derived_vtab (c
->ts
.u
.derived
);
8725 c
->high
= gfc_get_int_expr (gfc_default_integer_kind
, NULL
,
8726 c
->ts
.u
.derived
->hash_value
);
8730 vtab
= gfc_find_vtab (&c
->ts
);
8731 gcc_assert (vtab
&& CLASS_DATA (vtab
)->initializer
);
8732 e
= CLASS_DATA (vtab
)->initializer
;
8733 c
->high
= gfc_copy_expr (e
);
8736 e
= gfc_lval_expr_from_sym (vtab
);
8737 c
->low
= build_loc_call (e
);
8742 /* Associate temporary to selector. This should only be done
8743 when this case is actually true, so build a new ASSOCIATE
8744 that does precisely this here (instead of using the
8747 if (c
->ts
.type
== BT_CLASS
)
8748 sprintf (name
, "__tmp_class_%s", c
->ts
.u
.derived
->name
);
8749 else if (c
->ts
.type
== BT_DERIVED
)
8750 sprintf (name
, "__tmp_type_%s", c
->ts
.u
.derived
->name
);
8751 else if (c
->ts
.type
== BT_CHARACTER
)
8753 if (c
->ts
.u
.cl
&& c
->ts
.u
.cl
->length
8754 && c
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
8755 charlen
= mpz_get_si (c
->ts
.u
.cl
->length
->value
.integer
);
8756 sprintf (name
, "__tmp_%s_%d_%d", gfc_basic_typename (c
->ts
.type
),
8757 charlen
, c
->ts
.kind
);
8760 sprintf (name
, "__tmp_%s_%d", gfc_basic_typename (c
->ts
.type
),
8763 st
= gfc_find_symtree (ns
->sym_root
, name
);
8764 gcc_assert (st
->n
.sym
->assoc
);
8765 st
->n
.sym
->assoc
->target
= gfc_get_variable_expr (selector_expr
->symtree
);
8766 st
->n
.sym
->assoc
->target
->where
= selector_expr
->where
;
8767 if (c
->ts
.type
!= BT_CLASS
&& c
->ts
.type
!= BT_UNKNOWN
)
8769 gfc_add_data_component (st
->n
.sym
->assoc
->target
);
8770 /* Fixup the target expression if necessary. */
8772 fixup_array_ref (&st
->n
.sym
->assoc
->target
, NULL
, rank
, ref
);
8775 new_st
= gfc_get_code (EXEC_BLOCK
);
8776 new_st
->ext
.block
.ns
= gfc_build_block_ns (ns
);
8777 new_st
->ext
.block
.ns
->code
= body
->next
;
8778 body
->next
= new_st
;
8780 /* Chain in the new list only if it is marked as dangling. Otherwise
8781 there is a CASE label overlap and this is already used. Just ignore,
8782 the error is diagnosed elsewhere. */
8783 if (st
->n
.sym
->assoc
->dangling
)
8785 new_st
->ext
.block
.assoc
= st
->n
.sym
->assoc
;
8786 st
->n
.sym
->assoc
->dangling
= 0;
8789 resolve_assoc_var (st
->n
.sym
, false);
8792 /* Take out CLASS IS cases for separate treatment. */
8794 while (body
&& body
->block
)
8796 if (body
->block
->ext
.block
.case_list
->ts
.type
== BT_CLASS
)
8798 /* Add to class_is list. */
8799 if (class_is
== NULL
)
8801 class_is
= body
->block
;
8806 for (tail
= class_is
; tail
->block
; tail
= tail
->block
) ;
8807 tail
->block
= body
->block
;
8810 /* Remove from EXEC_SELECT list. */
8811 body
->block
= body
->block
->block
;
8824 /* Add a default case to hold the CLASS IS cases. */
8825 for (tail
= code
; tail
->block
; tail
= tail
->block
) ;
8826 tail
->block
= gfc_get_code (EXEC_SELECT_TYPE
);
8828 tail
->ext
.block
.case_list
= gfc_get_case ();
8829 tail
->ext
.block
.case_list
->ts
.type
= BT_UNKNOWN
;
8831 default_case
= tail
;
8834 /* More than one CLASS IS block? */
8835 if (class_is
->block
)
8839 /* Sort CLASS IS blocks by extension level. */
8843 for (c1
= &class_is
; (*c1
) && (*c1
)->block
; c1
= &((*c1
)->block
))
8846 /* F03:C817 (check for doubles). */
8847 if ((*c1
)->ext
.block
.case_list
->ts
.u
.derived
->hash_value
8848 == c2
->ext
.block
.case_list
->ts
.u
.derived
->hash_value
)
8850 gfc_error ("Double CLASS IS block in SELECT TYPE "
8852 &c2
->ext
.block
.case_list
->where
);
8855 if ((*c1
)->ext
.block
.case_list
->ts
.u
.derived
->attr
.extension
8856 < c2
->ext
.block
.case_list
->ts
.u
.derived
->attr
.extension
)
8859 (*c1
)->block
= c2
->block
;
8869 /* Generate IF chain. */
8870 if_st
= gfc_get_code (EXEC_IF
);
8872 for (body
= class_is
; body
; body
= body
->block
)
8874 new_st
->block
= gfc_get_code (EXEC_IF
);
8875 new_st
= new_st
->block
;
8876 /* Set up IF condition: Call _gfortran_is_extension_of. */
8877 new_st
->expr1
= gfc_get_expr ();
8878 new_st
->expr1
->expr_type
= EXPR_FUNCTION
;
8879 new_st
->expr1
->ts
.type
= BT_LOGICAL
;
8880 new_st
->expr1
->ts
.kind
= 4;
8881 new_st
->expr1
->value
.function
.name
= gfc_get_string (PREFIX ("is_extension_of"));
8882 new_st
->expr1
->value
.function
.isym
= XCNEW (gfc_intrinsic_sym
);
8883 new_st
->expr1
->value
.function
.isym
->id
= GFC_ISYM_EXTENDS_TYPE_OF
;
8884 /* Set up arguments. */
8885 new_st
->expr1
->value
.function
.actual
= gfc_get_actual_arglist ();
8886 new_st
->expr1
->value
.function
.actual
->expr
= gfc_get_variable_expr (selector_expr
->symtree
);
8887 new_st
->expr1
->value
.function
.actual
->expr
->where
= code
->loc
;
8888 new_st
->expr1
->where
= code
->loc
;
8889 gfc_add_vptr_component (new_st
->expr1
->value
.function
.actual
->expr
);
8890 vtab
= gfc_find_derived_vtab (body
->ext
.block
.case_list
->ts
.u
.derived
);
8891 st
= gfc_find_symtree (vtab
->ns
->sym_root
, vtab
->name
);
8892 new_st
->expr1
->value
.function
.actual
->next
= gfc_get_actual_arglist ();
8893 new_st
->expr1
->value
.function
.actual
->next
->expr
= gfc_get_variable_expr (st
);
8894 new_st
->expr1
->value
.function
.actual
->next
->expr
->where
= code
->loc
;
8895 new_st
->next
= body
->next
;
8897 if (default_case
->next
)
8899 new_st
->block
= gfc_get_code (EXEC_IF
);
8900 new_st
= new_st
->block
;
8901 new_st
->next
= default_case
->next
;
8904 /* Replace CLASS DEFAULT code by the IF chain. */
8905 default_case
->next
= if_st
;
8908 /* Resolve the internal code. This can not be done earlier because
8909 it requires that the sym->assoc of selectors is set already. */
8910 gfc_current_ns
= ns
;
8911 gfc_resolve_blocks (code
->block
, gfc_current_ns
);
8912 gfc_current_ns
= old_ns
;
8919 /* Resolve a transfer statement. This is making sure that:
8920 -- a derived type being transferred has only non-pointer components
8921 -- a derived type being transferred doesn't have private components, unless
8922 it's being transferred from the module where the type was defined
8923 -- we're not trying to transfer a whole assumed size array. */
8926 resolve_transfer (gfc_code
*code
)
8929 gfc_symbol
*sym
, *derived
;
8933 bool formatted
= false;
8934 gfc_dt
*dt
= code
->ext
.dt
;
8935 gfc_symbol
*dtio_sub
= NULL
;
8939 while (exp
!= NULL
&& exp
->expr_type
== EXPR_OP
8940 && exp
->value
.op
.op
== INTRINSIC_PARENTHESES
)
8941 exp
= exp
->value
.op
.op1
;
8943 if (exp
&& exp
->expr_type
== EXPR_NULL
8946 gfc_error ("Invalid context for NULL () intrinsic at %L",
8951 if (exp
== NULL
|| (exp
->expr_type
!= EXPR_VARIABLE
8952 && exp
->expr_type
!= EXPR_FUNCTION
8953 && exp
->expr_type
!= EXPR_STRUCTURE
))
8956 /* If we are reading, the variable will be changed. Note that
8957 code->ext.dt may be NULL if the TRANSFER is related to
8958 an INQUIRE statement -- but in this case, we are not reading, either. */
8959 if (dt
&& dt
->dt_io_kind
->value
.iokind
== M_READ
8960 && !gfc_check_vardef_context (exp
, false, false, false,
8964 ts
= exp
->expr_type
== EXPR_STRUCTURE
? &exp
->ts
: &exp
->symtree
->n
.sym
->ts
;
8966 /* Go to actual component transferred. */
8967 for (ref
= exp
->ref
; ref
; ref
= ref
->next
)
8968 if (ref
->type
== REF_COMPONENT
)
8969 ts
= &ref
->u
.c
.component
->ts
;
8971 if (dt
&& dt
->dt_io_kind
->value
.iokind
!= M_INQUIRE
8972 && (ts
->type
== BT_DERIVED
|| ts
->type
== BT_CLASS
))
8974 if (ts
->type
== BT_DERIVED
)
8975 derived
= ts
->u
.derived
;
8977 derived
= ts
->u
.derived
->components
->ts
.u
.derived
;
8979 if (dt
->format_expr
)
8982 fmt
= gfc_widechar_to_char (dt
->format_expr
->value
.character
.string
,
8984 if (strtok (fmt
, "DT") != NULL
)
8987 else if (dt
->format_label
== &format_asterisk
)
8989 /* List directed io must call the formatted DTIO procedure. */
8993 write
= dt
->dt_io_kind
->value
.iokind
== M_WRITE
8994 || dt
->dt_io_kind
->value
.iokind
== M_PRINT
;
8995 dtio_sub
= gfc_find_specific_dtio_proc (derived
, write
, formatted
);
8997 if (dtio_sub
!= NULL
&& exp
->expr_type
== EXPR_VARIABLE
)
9000 sym
= exp
->symtree
->n
.sym
->ns
->proc_name
;
9001 /* Check to see if this is a nested DTIO call, with the
9002 dummy as the io-list object. */
9003 if (sym
&& sym
== dtio_sub
&& sym
->formal
9004 && sym
->formal
->sym
== exp
->symtree
->n
.sym
9005 && exp
->ref
== NULL
)
9007 if (!sym
->attr
.recursive
)
9009 gfc_error ("DTIO %s procedure at %L must be recursive",
9010 sym
->name
, &sym
->declared_at
);
9017 if (ts
->type
== BT_CLASS
&& dtio_sub
== NULL
)
9019 gfc_error ("Data transfer element at %L cannot be polymorphic unless "
9020 "it is processed by a defined input/output procedure",
9025 if (ts
->type
== BT_DERIVED
)
9027 /* Check that transferred derived type doesn't contain POINTER
9028 components unless it is processed by a defined input/output
9030 if (ts
->u
.derived
->attr
.pointer_comp
&& dtio_sub
== NULL
)
9032 gfc_error ("Data transfer element at %L cannot have POINTER "
9033 "components unless it is processed by a defined "
9034 "input/output procedure", &code
->loc
);
9039 if (ts
->u
.derived
->attr
.proc_pointer_comp
)
9041 gfc_error ("Data transfer element at %L cannot have "
9042 "procedure pointer components", &code
->loc
);
9046 if (ts
->u
.derived
->attr
.alloc_comp
&& dtio_sub
== NULL
)
9048 gfc_error ("Data transfer element at %L cannot have ALLOCATABLE "
9049 "components unless it is processed by a defined "
9050 "input/output procedure", &code
->loc
);
9054 /* C_PTR and C_FUNPTR have private components which means they can not
9055 be printed. However, if -std=gnu and not -pedantic, allow
9056 the component to be printed to help debugging. */
9057 if (ts
->u
.derived
->ts
.f90_type
== BT_VOID
)
9059 if (!gfc_notify_std (GFC_STD_GNU
, "Data transfer element at %L "
9060 "cannot have PRIVATE components", &code
->loc
))
9063 else if (derived_inaccessible (ts
->u
.derived
) && dtio_sub
== NULL
)
9065 gfc_error ("Data transfer element at %L cannot have "
9066 "PRIVATE components unless it is processed by "
9067 "a defined input/output procedure", &code
->loc
);
9072 if (exp
->expr_type
== EXPR_STRUCTURE
)
9075 sym
= exp
->symtree
->n
.sym
;
9077 if (sym
->as
!= NULL
&& sym
->as
->type
== AS_ASSUMED_SIZE
&& exp
->ref
9078 && exp
->ref
->type
== REF_ARRAY
&& exp
->ref
->u
.ar
.type
== AR_FULL
)
9080 gfc_error ("Data transfer element at %L cannot be a full reference to "
9081 "an assumed-size array", &code
->loc
);
9087 /*********** Toplevel code resolution subroutines ***********/
9089 /* Find the set of labels that are reachable from this block. We also
9090 record the last statement in each block. */
9093 find_reachable_labels (gfc_code
*block
)
9100 cs_base
->reachable_labels
= bitmap_obstack_alloc (&labels_obstack
);
9102 /* Collect labels in this block. We don't keep those corresponding
9103 to END {IF|SELECT}, these are checked in resolve_branch by going
9104 up through the code_stack. */
9105 for (c
= block
; c
; c
= c
->next
)
9107 if (c
->here
&& c
->op
!= EXEC_END_NESTED_BLOCK
)
9108 bitmap_set_bit (cs_base
->reachable_labels
, c
->here
->value
);
9111 /* Merge with labels from parent block. */
9114 gcc_assert (cs_base
->prev
->reachable_labels
);
9115 bitmap_ior_into (cs_base
->reachable_labels
,
9116 cs_base
->prev
->reachable_labels
);
9122 resolve_lock_unlock_event (gfc_code
*code
)
9124 if (code
->expr1
->expr_type
== EXPR_FUNCTION
9125 && code
->expr1
->value
.function
.isym
9126 && code
->expr1
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
9127 remove_caf_get_intrinsic (code
->expr1
);
9129 if ((code
->op
== EXEC_LOCK
|| code
->op
== EXEC_UNLOCK
)
9130 && (code
->expr1
->ts
.type
!= BT_DERIVED
9131 || code
->expr1
->expr_type
!= EXPR_VARIABLE
9132 || code
->expr1
->ts
.u
.derived
->from_intmod
!= INTMOD_ISO_FORTRAN_ENV
9133 || code
->expr1
->ts
.u
.derived
->intmod_sym_id
!= ISOFORTRAN_LOCK_TYPE
9134 || code
->expr1
->rank
!= 0
9135 || (!gfc_is_coarray (code
->expr1
) &&
9136 !gfc_is_coindexed (code
->expr1
))))
9137 gfc_error ("Lock variable at %L must be a scalar of type LOCK_TYPE",
9138 &code
->expr1
->where
);
9139 else if ((code
->op
== EXEC_EVENT_POST
|| code
->op
== EXEC_EVENT_WAIT
)
9140 && (code
->expr1
->ts
.type
!= BT_DERIVED
9141 || code
->expr1
->expr_type
!= EXPR_VARIABLE
9142 || code
->expr1
->ts
.u
.derived
->from_intmod
9143 != INTMOD_ISO_FORTRAN_ENV
9144 || code
->expr1
->ts
.u
.derived
->intmod_sym_id
9145 != ISOFORTRAN_EVENT_TYPE
9146 || code
->expr1
->rank
!= 0))
9147 gfc_error ("Event variable at %L must be a scalar of type EVENT_TYPE",
9148 &code
->expr1
->where
);
9149 else if (code
->op
== EXEC_EVENT_POST
&& !gfc_is_coarray (code
->expr1
)
9150 && !gfc_is_coindexed (code
->expr1
))
9151 gfc_error ("Event variable argument at %L must be a coarray or coindexed",
9152 &code
->expr1
->where
);
9153 else if (code
->op
== EXEC_EVENT_WAIT
&& !gfc_is_coarray (code
->expr1
))
9154 gfc_error ("Event variable argument at %L must be a coarray but not "
9155 "coindexed", &code
->expr1
->where
);
9159 && (code
->expr2
->ts
.type
!= BT_INTEGER
|| code
->expr2
->rank
!= 0
9160 || code
->expr2
->expr_type
!= EXPR_VARIABLE
))
9161 gfc_error ("STAT= argument at %L must be a scalar INTEGER variable",
9162 &code
->expr2
->where
);
9165 && !gfc_check_vardef_context (code
->expr2
, false, false, false,
9166 _("STAT variable")))
9171 && (code
->expr3
->ts
.type
!= BT_CHARACTER
|| code
->expr3
->rank
!= 0
9172 || code
->expr3
->expr_type
!= EXPR_VARIABLE
))
9173 gfc_error ("ERRMSG= argument at %L must be a scalar CHARACTER variable",
9174 &code
->expr3
->where
);
9177 && !gfc_check_vardef_context (code
->expr3
, false, false, false,
9178 _("ERRMSG variable")))
9181 /* Check for LOCK the ACQUIRED_LOCK. */
9182 if (code
->op
!= EXEC_EVENT_WAIT
&& code
->expr4
9183 && (code
->expr4
->ts
.type
!= BT_LOGICAL
|| code
->expr4
->rank
!= 0
9184 || code
->expr4
->expr_type
!= EXPR_VARIABLE
))
9185 gfc_error ("ACQUIRED_LOCK= argument at %L must be a scalar LOGICAL "
9186 "variable", &code
->expr4
->where
);
9188 if (code
->op
!= EXEC_EVENT_WAIT
&& code
->expr4
9189 && !gfc_check_vardef_context (code
->expr4
, false, false, false,
9190 _("ACQUIRED_LOCK variable")))
9193 /* Check for EVENT WAIT the UNTIL_COUNT. */
9194 if (code
->op
== EXEC_EVENT_WAIT
&& code
->expr4
)
9196 if (!gfc_resolve_expr (code
->expr4
) || code
->expr4
->ts
.type
!= BT_INTEGER
9197 || code
->expr4
->rank
!= 0)
9198 gfc_error ("UNTIL_COUNT= argument at %L must be a scalar INTEGER "
9199 "expression", &code
->expr4
->where
);
9205 resolve_critical (gfc_code
*code
)
9207 gfc_symtree
*symtree
;
9208 gfc_symbol
*lock_type
;
9209 char name
[GFC_MAX_SYMBOL_LEN
];
9210 static int serial
= 0;
9212 if (flag_coarray
!= GFC_FCOARRAY_LIB
)
9215 symtree
= gfc_find_symtree (gfc_current_ns
->sym_root
,
9216 GFC_PREFIX ("lock_type"));
9218 lock_type
= symtree
->n
.sym
;
9221 if (gfc_get_sym_tree (GFC_PREFIX ("lock_type"), gfc_current_ns
, &symtree
,
9224 lock_type
= symtree
->n
.sym
;
9225 lock_type
->attr
.flavor
= FL_DERIVED
;
9226 lock_type
->attr
.zero_comp
= 1;
9227 lock_type
->from_intmod
= INTMOD_ISO_FORTRAN_ENV
;
9228 lock_type
->intmod_sym_id
= ISOFORTRAN_LOCK_TYPE
;
9231 sprintf(name
, GFC_PREFIX ("lock_var") "%d",serial
++);
9232 if (gfc_get_sym_tree (name
, gfc_current_ns
, &symtree
, false) != 0)
9235 code
->resolved_sym
= symtree
->n
.sym
;
9236 symtree
->n
.sym
->attr
.flavor
= FL_VARIABLE
;
9237 symtree
->n
.sym
->attr
.referenced
= 1;
9238 symtree
->n
.sym
->attr
.artificial
= 1;
9239 symtree
->n
.sym
->attr
.codimension
= 1;
9240 symtree
->n
.sym
->ts
.type
= BT_DERIVED
;
9241 symtree
->n
.sym
->ts
.u
.derived
= lock_type
;
9242 symtree
->n
.sym
->as
= gfc_get_array_spec ();
9243 symtree
->n
.sym
->as
->corank
= 1;
9244 symtree
->n
.sym
->as
->type
= AS_EXPLICIT
;
9245 symtree
->n
.sym
->as
->cotype
= AS_EXPLICIT
;
9246 symtree
->n
.sym
->as
->lower
[0] = gfc_get_int_expr (gfc_default_integer_kind
,
9248 gfc_commit_symbols();
9253 resolve_sync (gfc_code
*code
)
9255 /* Check imageset. The * case matches expr1 == NULL. */
9258 if (code
->expr1
->ts
.type
!= BT_INTEGER
|| code
->expr1
->rank
> 1)
9259 gfc_error ("Imageset argument at %L must be a scalar or rank-1 "
9260 "INTEGER expression", &code
->expr1
->where
);
9261 if (code
->expr1
->expr_type
== EXPR_CONSTANT
&& code
->expr1
->rank
== 0
9262 && mpz_cmp_si (code
->expr1
->value
.integer
, 1) < 0)
9263 gfc_error ("Imageset argument at %L must between 1 and num_images()",
9264 &code
->expr1
->where
);
9265 else if (code
->expr1
->expr_type
== EXPR_ARRAY
9266 && gfc_simplify_expr (code
->expr1
, 0))
9268 gfc_constructor
*cons
;
9269 cons
= gfc_constructor_first (code
->expr1
->value
.constructor
);
9270 for (; cons
; cons
= gfc_constructor_next (cons
))
9271 if (cons
->expr
->expr_type
== EXPR_CONSTANT
9272 && mpz_cmp_si (cons
->expr
->value
.integer
, 1) < 0)
9273 gfc_error ("Imageset argument at %L must between 1 and "
9274 "num_images()", &cons
->expr
->where
);
9280 && (code
->expr2
->ts
.type
!= BT_INTEGER
|| code
->expr2
->rank
!= 0
9281 || code
->expr2
->expr_type
!= EXPR_VARIABLE
))
9282 gfc_error ("STAT= argument at %L must be a scalar INTEGER variable",
9283 &code
->expr2
->where
);
9287 && (code
->expr3
->ts
.type
!= BT_CHARACTER
|| code
->expr3
->rank
!= 0
9288 || code
->expr3
->expr_type
!= EXPR_VARIABLE
))
9289 gfc_error ("ERRMSG= argument at %L must be a scalar CHARACTER variable",
9290 &code
->expr3
->where
);
9294 /* Given a branch to a label, see if the branch is conforming.
9295 The code node describes where the branch is located. */
9298 resolve_branch (gfc_st_label
*label
, gfc_code
*code
)
9305 /* Step one: is this a valid branching target? */
9307 if (label
->defined
== ST_LABEL_UNKNOWN
)
9309 gfc_error ("Label %d referenced at %L is never defined", label
->value
,
9314 if (label
->defined
!= ST_LABEL_TARGET
&& label
->defined
!= ST_LABEL_DO_TARGET
)
9316 gfc_error ("Statement at %L is not a valid branch target statement "
9317 "for the branch statement at %L", &label
->where
, &code
->loc
);
9321 /* Step two: make sure this branch is not a branch to itself ;-) */
9323 if (code
->here
== label
)
9326 "Branch at %L may result in an infinite loop", &code
->loc
);
9330 /* Step three: See if the label is in the same block as the
9331 branching statement. The hard work has been done by setting up
9332 the bitmap reachable_labels. */
9334 if (bitmap_bit_p (cs_base
->reachable_labels
, label
->value
))
9336 /* Check now whether there is a CRITICAL construct; if so, check
9337 whether the label is still visible outside of the CRITICAL block,
9338 which is invalid. */
9339 for (stack
= cs_base
; stack
; stack
= stack
->prev
)
9341 if (stack
->current
->op
== EXEC_CRITICAL
9342 && bitmap_bit_p (stack
->reachable_labels
, label
->value
))
9343 gfc_error ("GOTO statement at %L leaves CRITICAL construct for "
9344 "label at %L", &code
->loc
, &label
->where
);
9345 else if (stack
->current
->op
== EXEC_DO_CONCURRENT
9346 && bitmap_bit_p (stack
->reachable_labels
, label
->value
))
9347 gfc_error ("GOTO statement at %L leaves DO CONCURRENT construct "
9348 "for label at %L", &code
->loc
, &label
->where
);
9354 /* Step four: If we haven't found the label in the bitmap, it may
9355 still be the label of the END of the enclosing block, in which
9356 case we find it by going up the code_stack. */
9358 for (stack
= cs_base
; stack
; stack
= stack
->prev
)
9360 if (stack
->current
->next
&& stack
->current
->next
->here
== label
)
9362 if (stack
->current
->op
== EXEC_CRITICAL
)
9364 /* Note: A label at END CRITICAL does not leave the CRITICAL
9365 construct as END CRITICAL is still part of it. */
9366 gfc_error ("GOTO statement at %L leaves CRITICAL construct for label"
9367 " at %L", &code
->loc
, &label
->where
);
9370 else if (stack
->current
->op
== EXEC_DO_CONCURRENT
)
9372 gfc_error ("GOTO statement at %L leaves DO CONCURRENT construct for "
9373 "label at %L", &code
->loc
, &label
->where
);
9380 gcc_assert (stack
->current
->next
->op
== EXEC_END_NESTED_BLOCK
);
9384 /* The label is not in an enclosing block, so illegal. This was
9385 allowed in Fortran 66, so we allow it as extension. No
9386 further checks are necessary in this case. */
9387 gfc_notify_std (GFC_STD_LEGACY
, "Label at %L is not in the same block "
9388 "as the GOTO statement at %L", &label
->where
,
9394 /* Check whether EXPR1 has the same shape as EXPR2. */
9397 resolve_where_shape (gfc_expr
*expr1
, gfc_expr
*expr2
)
9399 mpz_t shape
[GFC_MAX_DIMENSIONS
];
9400 mpz_t shape2
[GFC_MAX_DIMENSIONS
];
9401 bool result
= false;
9404 /* Compare the rank. */
9405 if (expr1
->rank
!= expr2
->rank
)
9408 /* Compare the size of each dimension. */
9409 for (i
=0; i
<expr1
->rank
; i
++)
9411 if (!gfc_array_dimen_size (expr1
, i
, &shape
[i
]))
9414 if (!gfc_array_dimen_size (expr2
, i
, &shape2
[i
]))
9417 if (mpz_cmp (shape
[i
], shape2
[i
]))
9421 /* When either of the two expression is an assumed size array, we
9422 ignore the comparison of dimension sizes. */
9427 gfc_clear_shape (shape
, i
);
9428 gfc_clear_shape (shape2
, i
);
9433 /* Check whether a WHERE assignment target or a WHERE mask expression
9434 has the same shape as the outmost WHERE mask expression. */
9437 resolve_where (gfc_code
*code
, gfc_expr
*mask
)
9443 cblock
= code
->block
;
9445 /* Store the first WHERE mask-expr of the WHERE statement or construct.
9446 In case of nested WHERE, only the outmost one is stored. */
9447 if (mask
== NULL
) /* outmost WHERE */
9449 else /* inner WHERE */
9456 /* Check if the mask-expr has a consistent shape with the
9457 outmost WHERE mask-expr. */
9458 if (!resolve_where_shape (cblock
->expr1
, e
))
9459 gfc_error ("WHERE mask at %L has inconsistent shape",
9460 &cblock
->expr1
->where
);
9463 /* the assignment statement of a WHERE statement, or the first
9464 statement in where-body-construct of a WHERE construct */
9465 cnext
= cblock
->next
;
9470 /* WHERE assignment statement */
9473 /* Check shape consistent for WHERE assignment target. */
9474 if (e
&& !resolve_where_shape (cnext
->expr1
, e
))
9475 gfc_error ("WHERE assignment target at %L has "
9476 "inconsistent shape", &cnext
->expr1
->where
);
9480 case EXEC_ASSIGN_CALL
:
9481 resolve_call (cnext
);
9482 if (!cnext
->resolved_sym
->attr
.elemental
)
9483 gfc_error("Non-ELEMENTAL user-defined assignment in WHERE at %L",
9484 &cnext
->ext
.actual
->expr
->where
);
9487 /* WHERE or WHERE construct is part of a where-body-construct */
9489 resolve_where (cnext
, e
);
9493 gfc_error ("Unsupported statement inside WHERE at %L",
9496 /* the next statement within the same where-body-construct */
9497 cnext
= cnext
->next
;
9499 /* the next masked-elsewhere-stmt, elsewhere-stmt, or end-where-stmt */
9500 cblock
= cblock
->block
;
9505 /* Resolve assignment in FORALL construct.
9506 NVAR is the number of FORALL index variables, and VAR_EXPR records the
9507 FORALL index variables. */
9510 gfc_resolve_assign_in_forall (gfc_code
*code
, int nvar
, gfc_expr
**var_expr
)
9514 for (n
= 0; n
< nvar
; n
++)
9516 gfc_symbol
*forall_index
;
9518 forall_index
= var_expr
[n
]->symtree
->n
.sym
;
9520 /* Check whether the assignment target is one of the FORALL index
9522 if ((code
->expr1
->expr_type
== EXPR_VARIABLE
)
9523 && (code
->expr1
->symtree
->n
.sym
== forall_index
))
9524 gfc_error ("Assignment to a FORALL index variable at %L",
9525 &code
->expr1
->where
);
9528 /* If one of the FORALL index variables doesn't appear in the
9529 assignment variable, then there could be a many-to-one
9530 assignment. Emit a warning rather than an error because the
9531 mask could be resolving this problem. */
9532 if (!find_forall_index (code
->expr1
, forall_index
, 0))
9533 gfc_warning (0, "The FORALL with index %qs is not used on the "
9534 "left side of the assignment at %L and so might "
9535 "cause multiple assignment to this object",
9536 var_expr
[n
]->symtree
->name
, &code
->expr1
->where
);
9542 /* Resolve WHERE statement in FORALL construct. */
9545 gfc_resolve_where_code_in_forall (gfc_code
*code
, int nvar
,
9546 gfc_expr
**var_expr
)
9551 cblock
= code
->block
;
9554 /* the assignment statement of a WHERE statement, or the first
9555 statement in where-body-construct of a WHERE construct */
9556 cnext
= cblock
->next
;
9561 /* WHERE assignment statement */
9563 gfc_resolve_assign_in_forall (cnext
, nvar
, var_expr
);
9566 /* WHERE operator assignment statement */
9567 case EXEC_ASSIGN_CALL
:
9568 resolve_call (cnext
);
9569 if (!cnext
->resolved_sym
->attr
.elemental
)
9570 gfc_error("Non-ELEMENTAL user-defined assignment in WHERE at %L",
9571 &cnext
->ext
.actual
->expr
->where
);
9574 /* WHERE or WHERE construct is part of a where-body-construct */
9576 gfc_resolve_where_code_in_forall (cnext
, nvar
, var_expr
);
9580 gfc_error ("Unsupported statement inside WHERE at %L",
9583 /* the next statement within the same where-body-construct */
9584 cnext
= cnext
->next
;
9586 /* the next masked-elsewhere-stmt, elsewhere-stmt, or end-where-stmt */
9587 cblock
= cblock
->block
;
9592 /* Traverse the FORALL body to check whether the following errors exist:
9593 1. For assignment, check if a many-to-one assignment happens.
9594 2. For WHERE statement, check the WHERE body to see if there is any
9595 many-to-one assignment. */
9598 gfc_resolve_forall_body (gfc_code
*code
, int nvar
, gfc_expr
**var_expr
)
9602 c
= code
->block
->next
;
9608 case EXEC_POINTER_ASSIGN
:
9609 gfc_resolve_assign_in_forall (c
, nvar
, var_expr
);
9612 case EXEC_ASSIGN_CALL
:
9616 /* Because the gfc_resolve_blocks() will handle the nested FORALL,
9617 there is no need to handle it here. */
9621 gfc_resolve_where_code_in_forall(c
, nvar
, var_expr
);
9626 /* The next statement in the FORALL body. */
9632 /* Counts the number of iterators needed inside a forall construct, including
9633 nested forall constructs. This is used to allocate the needed memory
9634 in gfc_resolve_forall. */
9637 gfc_count_forall_iterators (gfc_code
*code
)
9639 int max_iters
, sub_iters
, current_iters
;
9640 gfc_forall_iterator
*fa
;
9642 gcc_assert(code
->op
== EXEC_FORALL
);
9646 for (fa
= code
->ext
.forall_iterator
; fa
; fa
= fa
->next
)
9649 code
= code
->block
->next
;
9653 if (code
->op
== EXEC_FORALL
)
9655 sub_iters
= gfc_count_forall_iterators (code
);
9656 if (sub_iters
> max_iters
)
9657 max_iters
= sub_iters
;
9662 return current_iters
+ max_iters
;
9666 /* Given a FORALL construct, first resolve the FORALL iterator, then call
9667 gfc_resolve_forall_body to resolve the FORALL body. */
9670 gfc_resolve_forall (gfc_code
*code
, gfc_namespace
*ns
, int forall_save
)
9672 static gfc_expr
**var_expr
;
9673 static int total_var
= 0;
9674 static int nvar
= 0;
9675 int i
, old_nvar
, tmp
;
9676 gfc_forall_iterator
*fa
;
9680 /* Start to resolve a FORALL construct */
9681 if (forall_save
== 0)
9683 /* Count the total number of FORALL indices in the nested FORALL
9684 construct in order to allocate the VAR_EXPR with proper size. */
9685 total_var
= gfc_count_forall_iterators (code
);
9687 /* Allocate VAR_EXPR with NUMBER_OF_FORALL_INDEX elements. */
9688 var_expr
= XCNEWVEC (gfc_expr
*, total_var
);
9691 /* The information about FORALL iterator, including FORALL indices start, end
9692 and stride. An outer FORALL indice cannot appear in start, end or stride. */
9693 for (fa
= code
->ext
.forall_iterator
; fa
; fa
= fa
->next
)
9695 /* Fortran 20008: C738 (R753). */
9696 if (fa
->var
->ref
&& fa
->var
->ref
->type
== REF_ARRAY
)
9698 gfc_error ("FORALL index-name at %L must be a scalar variable "
9699 "of type integer", &fa
->var
->where
);
9703 /* Check if any outer FORALL index name is the same as the current
9705 for (i
= 0; i
< nvar
; i
++)
9707 if (fa
->var
->symtree
->n
.sym
== var_expr
[i
]->symtree
->n
.sym
)
9708 gfc_error ("An outer FORALL construct already has an index "
9709 "with this name %L", &fa
->var
->where
);
9712 /* Record the current FORALL index. */
9713 var_expr
[nvar
] = gfc_copy_expr (fa
->var
);
9717 /* No memory leak. */
9718 gcc_assert (nvar
<= total_var
);
9721 /* Resolve the FORALL body. */
9722 gfc_resolve_forall_body (code
, nvar
, var_expr
);
9724 /* May call gfc_resolve_forall to resolve the inner FORALL loop. */
9725 gfc_resolve_blocks (code
->block
, ns
);
9729 /* Free only the VAR_EXPRs allocated in this frame. */
9730 for (i
= nvar
; i
< tmp
; i
++)
9731 gfc_free_expr (var_expr
[i
]);
9735 /* We are in the outermost FORALL construct. */
9736 gcc_assert (forall_save
== 0);
9738 /* VAR_EXPR is not needed any more. */
9745 /* Resolve a BLOCK construct statement. */
9748 resolve_block_construct (gfc_code
* code
)
9750 /* Resolve the BLOCK's namespace. */
9751 gfc_resolve (code
->ext
.block
.ns
);
9753 /* For an ASSOCIATE block, the associations (and their targets) are already
9754 resolved during resolve_symbol. */
9758 /* Resolve lists of blocks found in IF, SELECT CASE, WHERE, FORALL, GOTO and
9762 gfc_resolve_blocks (gfc_code
*b
, gfc_namespace
*ns
)
9766 for (; b
; b
= b
->block
)
9768 t
= gfc_resolve_expr (b
->expr1
);
9769 if (!gfc_resolve_expr (b
->expr2
))
9775 if (t
&& b
->expr1
!= NULL
9776 && (b
->expr1
->ts
.type
!= BT_LOGICAL
|| b
->expr1
->rank
!= 0))
9777 gfc_error ("IF clause at %L requires a scalar LOGICAL expression",
9784 && (b
->expr1
->ts
.type
!= BT_LOGICAL
|| b
->expr1
->rank
== 0))
9785 gfc_error ("WHERE/ELSEWHERE clause at %L requires a LOGICAL array",
9790 resolve_branch (b
->label1
, b
);
9794 resolve_block_construct (b
);
9798 case EXEC_SELECT_TYPE
:
9802 case EXEC_DO_CONCURRENT
:
9810 case EXEC_OMP_ATOMIC
:
9811 case EXEC_OACC_ATOMIC
:
9813 gfc_omp_atomic_op aop
9814 = (gfc_omp_atomic_op
) (b
->ext
.omp_atomic
& GFC_OMP_ATOMIC_MASK
);
9816 /* Verify this before calling gfc_resolve_code, which might
9818 gcc_assert (b
->next
&& b
->next
->op
== EXEC_ASSIGN
);
9819 gcc_assert (((aop
!= GFC_OMP_ATOMIC_CAPTURE
)
9820 && b
->next
->next
== NULL
)
9821 || ((aop
== GFC_OMP_ATOMIC_CAPTURE
)
9822 && b
->next
->next
!= NULL
9823 && b
->next
->next
->op
== EXEC_ASSIGN
9824 && b
->next
->next
->next
== NULL
));
9828 case EXEC_OACC_PARALLEL_LOOP
:
9829 case EXEC_OACC_PARALLEL
:
9830 case EXEC_OACC_KERNELS_LOOP
:
9831 case EXEC_OACC_KERNELS
:
9832 case EXEC_OACC_DATA
:
9833 case EXEC_OACC_HOST_DATA
:
9834 case EXEC_OACC_LOOP
:
9835 case EXEC_OACC_UPDATE
:
9836 case EXEC_OACC_WAIT
:
9837 case EXEC_OACC_CACHE
:
9838 case EXEC_OACC_ENTER_DATA
:
9839 case EXEC_OACC_EXIT_DATA
:
9840 case EXEC_OACC_ROUTINE
:
9841 case EXEC_OMP_CRITICAL
:
9842 case EXEC_OMP_DISTRIBUTE
:
9843 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO
:
9844 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO_SIMD
:
9845 case EXEC_OMP_DISTRIBUTE_SIMD
:
9847 case EXEC_OMP_DO_SIMD
:
9848 case EXEC_OMP_MASTER
:
9849 case EXEC_OMP_ORDERED
:
9850 case EXEC_OMP_PARALLEL
:
9851 case EXEC_OMP_PARALLEL_DO
:
9852 case EXEC_OMP_PARALLEL_DO_SIMD
:
9853 case EXEC_OMP_PARALLEL_SECTIONS
:
9854 case EXEC_OMP_PARALLEL_WORKSHARE
:
9855 case EXEC_OMP_SECTIONS
:
9857 case EXEC_OMP_SINGLE
:
9858 case EXEC_OMP_TARGET
:
9859 case EXEC_OMP_TARGET_DATA
:
9860 case EXEC_OMP_TARGET_ENTER_DATA
:
9861 case EXEC_OMP_TARGET_EXIT_DATA
:
9862 case EXEC_OMP_TARGET_PARALLEL
:
9863 case EXEC_OMP_TARGET_PARALLEL_DO
:
9864 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
9865 case EXEC_OMP_TARGET_SIMD
:
9866 case EXEC_OMP_TARGET_TEAMS
:
9867 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
9868 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
9869 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
9870 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
9871 case EXEC_OMP_TARGET_UPDATE
:
9873 case EXEC_OMP_TASKGROUP
:
9874 case EXEC_OMP_TASKLOOP
:
9875 case EXEC_OMP_TASKLOOP_SIMD
:
9876 case EXEC_OMP_TASKWAIT
:
9877 case EXEC_OMP_TASKYIELD
:
9878 case EXEC_OMP_TEAMS
:
9879 case EXEC_OMP_TEAMS_DISTRIBUTE
:
9880 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
9881 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
9882 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
9883 case EXEC_OMP_WORKSHARE
:
9887 gfc_internal_error ("gfc_resolve_blocks(): Bad block type");
9890 gfc_resolve_code (b
->next
, ns
);
9895 /* Does everything to resolve an ordinary assignment. Returns true
9896 if this is an interface assignment. */
9898 resolve_ordinary_assign (gfc_code
*code
, gfc_namespace
*ns
)
9907 symbol_attribute attr
;
9909 if (gfc_extend_assign (code
, ns
))
9913 if (code
->op
== EXEC_ASSIGN_CALL
)
9915 lhs
= code
->ext
.actual
->expr
;
9916 rhsptr
= &code
->ext
.actual
->next
->expr
;
9920 gfc_actual_arglist
* args
;
9921 gfc_typebound_proc
* tbp
;
9923 gcc_assert (code
->op
== EXEC_COMPCALL
);
9925 args
= code
->expr1
->value
.compcall
.actual
;
9927 rhsptr
= &args
->next
->expr
;
9929 tbp
= code
->expr1
->value
.compcall
.tbp
;
9930 gcc_assert (!tbp
->is_generic
);
9933 /* Make a temporary rhs when there is a default initializer
9934 and rhs is the same symbol as the lhs. */
9935 if ((*rhsptr
)->expr_type
== EXPR_VARIABLE
9936 && (*rhsptr
)->symtree
->n
.sym
->ts
.type
== BT_DERIVED
9937 && gfc_has_default_initializer ((*rhsptr
)->symtree
->n
.sym
->ts
.u
.derived
)
9938 && (lhs
->symtree
->n
.sym
== (*rhsptr
)->symtree
->n
.sym
))
9939 *rhsptr
= gfc_get_parentheses (*rhsptr
);
9948 && !gfc_notify_std (GFC_STD_GNU
, "BOZ literal at %L outside "
9949 "a DATA statement and outside INT/REAL/DBLE/CMPLX",
9953 /* Handle the case of a BOZ literal on the RHS. */
9954 if (rhs
->is_boz
&& lhs
->ts
.type
!= BT_INTEGER
)
9957 if (warn_surprising
)
9958 gfc_warning (OPT_Wsurprising
,
9959 "BOZ literal at %L is bitwise transferred "
9960 "non-integer symbol %qs", &code
->loc
,
9961 lhs
->symtree
->n
.sym
->name
);
9963 if (!gfc_convert_boz (rhs
, &lhs
->ts
))
9965 if ((rc
= gfc_range_check (rhs
)) != ARITH_OK
)
9967 if (rc
== ARITH_UNDERFLOW
)
9968 gfc_error ("Arithmetic underflow of bit-wise transferred BOZ at %L"
9969 ". This check can be disabled with the option "
9970 "%<-fno-range-check%>", &rhs
->where
);
9971 else if (rc
== ARITH_OVERFLOW
)
9972 gfc_error ("Arithmetic overflow of bit-wise transferred BOZ at %L"
9973 ". This check can be disabled with the option "
9974 "%<-fno-range-check%>", &rhs
->where
);
9975 else if (rc
== ARITH_NAN
)
9976 gfc_error ("Arithmetic NaN of bit-wise transferred BOZ at %L"
9977 ". This check can be disabled with the option "
9978 "%<-fno-range-check%>", &rhs
->where
);
9983 if (lhs
->ts
.type
== BT_CHARACTER
9984 && warn_character_truncation
)
9986 if (lhs
->ts
.u
.cl
!= NULL
9987 && lhs
->ts
.u
.cl
->length
!= NULL
9988 && lhs
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
9989 llen
= mpz_get_si (lhs
->ts
.u
.cl
->length
->value
.integer
);
9991 if (rhs
->expr_type
== EXPR_CONSTANT
)
9992 rlen
= rhs
->value
.character
.length
;
9994 else if (rhs
->ts
.u
.cl
!= NULL
9995 && rhs
->ts
.u
.cl
->length
!= NULL
9996 && rhs
->ts
.u
.cl
->length
->expr_type
== EXPR_CONSTANT
)
9997 rlen
= mpz_get_si (rhs
->ts
.u
.cl
->length
->value
.integer
);
9999 if (rlen
&& llen
&& rlen
> llen
)
10000 gfc_warning_now (OPT_Wcharacter_truncation
,
10001 "CHARACTER expression will be truncated "
10002 "in assignment (%d/%d) at %L",
10003 llen
, rlen
, &code
->loc
);
10006 /* Ensure that a vector index expression for the lvalue is evaluated
10007 to a temporary if the lvalue symbol is referenced in it. */
10010 for (ref
= lhs
->ref
; ref
; ref
= ref
->next
)
10011 if (ref
->type
== REF_ARRAY
)
10013 for (n
= 0; n
< ref
->u
.ar
.dimen
; n
++)
10014 if (ref
->u
.ar
.dimen_type
[n
] == DIMEN_VECTOR
10015 && gfc_find_sym_in_expr (lhs
->symtree
->n
.sym
,
10016 ref
->u
.ar
.start
[n
]))
10018 = gfc_get_parentheses (ref
->u
.ar
.start
[n
]);
10022 if (gfc_pure (NULL
))
10024 if (lhs
->ts
.type
== BT_DERIVED
10025 && lhs
->expr_type
== EXPR_VARIABLE
10026 && lhs
->ts
.u
.derived
->attr
.pointer_comp
10027 && rhs
->expr_type
== EXPR_VARIABLE
10028 && (gfc_impure_variable (rhs
->symtree
->n
.sym
)
10029 || gfc_is_coindexed (rhs
)))
10031 /* F2008, C1283. */
10032 if (gfc_is_coindexed (rhs
))
10033 gfc_error ("Coindexed expression at %L is assigned to "
10034 "a derived type variable with a POINTER "
10035 "component in a PURE procedure",
10038 gfc_error ("The impure variable at %L is assigned to "
10039 "a derived type variable with a POINTER "
10040 "component in a PURE procedure (12.6)",
10045 /* Fortran 2008, C1283. */
10046 if (gfc_is_coindexed (lhs
))
10048 gfc_error ("Assignment to coindexed variable at %L in a PURE "
10049 "procedure", &rhs
->where
);
10054 if (gfc_implicit_pure (NULL
))
10056 if (lhs
->expr_type
== EXPR_VARIABLE
10057 && lhs
->symtree
->n
.sym
!= gfc_current_ns
->proc_name
10058 && lhs
->symtree
->n
.sym
->ns
!= gfc_current_ns
)
10059 gfc_unset_implicit_pure (NULL
);
10061 if (lhs
->ts
.type
== BT_DERIVED
10062 && lhs
->expr_type
== EXPR_VARIABLE
10063 && lhs
->ts
.u
.derived
->attr
.pointer_comp
10064 && rhs
->expr_type
== EXPR_VARIABLE
10065 && (gfc_impure_variable (rhs
->symtree
->n
.sym
)
10066 || gfc_is_coindexed (rhs
)))
10067 gfc_unset_implicit_pure (NULL
);
10069 /* Fortran 2008, C1283. */
10070 if (gfc_is_coindexed (lhs
))
10071 gfc_unset_implicit_pure (NULL
);
10074 /* F2008, 7.2.1.2. */
10075 attr
= gfc_expr_attr (lhs
);
10076 if (lhs
->ts
.type
== BT_CLASS
&& attr
.allocatable
)
10078 if (attr
.codimension
)
10080 gfc_error ("Assignment to polymorphic coarray at %L is not "
10081 "permitted", &lhs
->where
);
10084 if (!gfc_notify_std (GFC_STD_F2008
, "Assignment to an allocatable "
10085 "polymorphic variable at %L", &lhs
->where
))
10087 if (!flag_realloc_lhs
)
10089 gfc_error ("Assignment to an allocatable polymorphic variable at %L "
10090 "requires %<-frealloc-lhs%>", &lhs
->where
);
10094 else if (lhs
->ts
.type
== BT_CLASS
)
10096 gfc_error ("Nonallocatable variable must not be polymorphic in intrinsic "
10097 "assignment at %L - check that there is a matching specific "
10098 "subroutine for '=' operator", &lhs
->where
);
10102 bool lhs_coindexed
= gfc_is_coindexed (lhs
);
10104 /* F2008, Section 7.2.1.2. */
10105 if (lhs_coindexed
&& gfc_has_ultimate_allocatable (lhs
))
10107 gfc_error ("Coindexed variable must not have an allocatable ultimate "
10108 "component in assignment at %L", &lhs
->where
);
10112 /* Assign the 'data' of a class object to a derived type. */
10113 if (lhs
->ts
.type
== BT_DERIVED
10114 && rhs
->ts
.type
== BT_CLASS
)
10115 gfc_add_data_component (rhs
);
10117 bool caf_convert_to_send
= flag_coarray
== GFC_FCOARRAY_LIB
10119 || (code
->expr2
->expr_type
== EXPR_FUNCTION
10120 && code
->expr2
->value
.function
.isym
10121 && code
->expr2
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
10122 && (code
->expr1
->rank
== 0 || code
->expr2
->rank
!= 0)
10123 && !gfc_expr_attr (rhs
).allocatable
10124 && !gfc_has_vector_subscript (rhs
)));
10126 gfc_check_assign (lhs
, rhs
, 1, !caf_convert_to_send
);
10128 /* Insert a GFC_ISYM_CAF_SEND intrinsic, when the LHS is a coindexed variable.
10129 Additionally, insert this code when the RHS is a CAF as we then use the
10130 GFC_ISYM_CAF_SEND intrinsic just to avoid a temporary; but do not do so if
10131 the LHS is (re)allocatable or has a vector subscript. If the LHS is a
10132 noncoindexed array and the RHS is a coindexed scalar, use the normal code
10134 if (caf_convert_to_send
)
10136 if (code
->expr2
->expr_type
== EXPR_FUNCTION
10137 && code
->expr2
->value
.function
.isym
10138 && code
->expr2
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
10139 remove_caf_get_intrinsic (code
->expr2
);
10140 code
->op
= EXEC_CALL
;
10141 gfc_get_sym_tree (GFC_PREFIX ("caf_send"), ns
, &code
->symtree
, true);
10142 code
->resolved_sym
= code
->symtree
->n
.sym
;
10143 code
->resolved_sym
->attr
.flavor
= FL_PROCEDURE
;
10144 code
->resolved_sym
->attr
.intrinsic
= 1;
10145 code
->resolved_sym
->attr
.subroutine
= 1;
10146 code
->resolved_isym
= gfc_intrinsic_subroutine_by_id (GFC_ISYM_CAF_SEND
);
10147 gfc_commit_symbol (code
->resolved_sym
);
10148 code
->ext
.actual
= gfc_get_actual_arglist ();
10149 code
->ext
.actual
->expr
= lhs
;
10150 code
->ext
.actual
->next
= gfc_get_actual_arglist ();
10151 code
->ext
.actual
->next
->expr
= rhs
;
10152 code
->expr1
= NULL
;
10153 code
->expr2
= NULL
;
10160 /* Add a component reference onto an expression. */
10163 add_comp_ref (gfc_expr
*e
, gfc_component
*c
)
10168 ref
= &((*ref
)->next
);
10169 *ref
= gfc_get_ref ();
10170 (*ref
)->type
= REF_COMPONENT
;
10171 (*ref
)->u
.c
.sym
= e
->ts
.u
.derived
;
10172 (*ref
)->u
.c
.component
= c
;
10175 /* Add a full array ref, as necessary. */
10178 gfc_add_full_array_ref (e
, c
->as
);
10179 e
->rank
= c
->as
->rank
;
10184 /* Build an assignment. Keep the argument 'op' for future use, so that
10185 pointer assignments can be made. */
10188 build_assignment (gfc_exec_op op
, gfc_expr
*expr1
, gfc_expr
*expr2
,
10189 gfc_component
*comp1
, gfc_component
*comp2
, locus loc
)
10191 gfc_code
*this_code
;
10193 this_code
= gfc_get_code (op
);
10194 this_code
->next
= NULL
;
10195 this_code
->expr1
= gfc_copy_expr (expr1
);
10196 this_code
->expr2
= gfc_copy_expr (expr2
);
10197 this_code
->loc
= loc
;
10198 if (comp1
&& comp2
)
10200 add_comp_ref (this_code
->expr1
, comp1
);
10201 add_comp_ref (this_code
->expr2
, comp2
);
10208 /* Makes a temporary variable expression based on the characteristics of
10209 a given variable expression. */
10212 get_temp_from_expr (gfc_expr
*e
, gfc_namespace
*ns
)
10214 static int serial
= 0;
10215 char name
[GFC_MAX_SYMBOL_LEN
];
10217 gfc_array_spec
*as
;
10218 gfc_array_ref
*aref
;
10221 sprintf (name
, GFC_PREFIX("DA%d"), serial
++);
10222 gfc_get_sym_tree (name
, ns
, &tmp
, false);
10223 gfc_add_type (tmp
->n
.sym
, &e
->ts
, NULL
);
10229 /* Obtain the arrayspec for the temporary. */
10230 if (e
->rank
&& e
->expr_type
!= EXPR_ARRAY
10231 && e
->expr_type
!= EXPR_FUNCTION
10232 && e
->expr_type
!= EXPR_OP
)
10234 aref
= gfc_find_array_ref (e
);
10235 if (e
->expr_type
== EXPR_VARIABLE
10236 && e
->symtree
->n
.sym
->as
== aref
->as
)
10240 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
10241 if (ref
->type
== REF_COMPONENT
10242 && ref
->u
.c
.component
->as
== aref
->as
)
10250 /* Add the attributes and the arrayspec to the temporary. */
10251 tmp
->n
.sym
->attr
= gfc_expr_attr (e
);
10252 tmp
->n
.sym
->attr
.function
= 0;
10253 tmp
->n
.sym
->attr
.result
= 0;
10254 tmp
->n
.sym
->attr
.flavor
= FL_VARIABLE
;
10258 tmp
->n
.sym
->as
= gfc_copy_array_spec (as
);
10261 if (as
->type
== AS_DEFERRED
)
10262 tmp
->n
.sym
->attr
.allocatable
= 1;
10264 else if (e
->rank
&& (e
->expr_type
== EXPR_ARRAY
10265 || e
->expr_type
== EXPR_FUNCTION
10266 || e
->expr_type
== EXPR_OP
))
10268 tmp
->n
.sym
->as
= gfc_get_array_spec ();
10269 tmp
->n
.sym
->as
->type
= AS_DEFERRED
;
10270 tmp
->n
.sym
->as
->rank
= e
->rank
;
10271 tmp
->n
.sym
->attr
.allocatable
= 1;
10272 tmp
->n
.sym
->attr
.dimension
= 1;
10275 tmp
->n
.sym
->attr
.dimension
= 0;
10277 gfc_set_sym_referenced (tmp
->n
.sym
);
10278 gfc_commit_symbol (tmp
->n
.sym
);
10279 e
= gfc_lval_expr_from_sym (tmp
->n
.sym
);
10281 /* Should the lhs be a section, use its array ref for the
10282 temporary expression. */
10283 if (aref
&& aref
->type
!= AR_FULL
)
10285 gfc_free_ref_list (e
->ref
);
10286 e
->ref
= gfc_copy_ref (ref
);
10292 /* Add one line of code to the code chain, making sure that 'head' and
10293 'tail' are appropriately updated. */
10296 add_code_to_chain (gfc_code
**this_code
, gfc_code
**head
, gfc_code
**tail
)
10298 gcc_assert (this_code
);
10300 *head
= *tail
= *this_code
;
10302 *tail
= gfc_append_code (*tail
, *this_code
);
10307 /* Counts the potential number of part array references that would
10308 result from resolution of typebound defined assignments. */
10311 nonscalar_typebound_assign (gfc_symbol
*derived
, int depth
)
10314 int c_depth
= 0, t_depth
;
10316 for (c
= derived
->components
; c
; c
= c
->next
)
10318 if ((!gfc_bt_struct (c
->ts
.type
)
10320 || c
->attr
.allocatable
10321 || c
->attr
.proc_pointer_comp
10322 || c
->attr
.class_pointer
10323 || c
->attr
.proc_pointer
)
10324 && !c
->attr
.defined_assign_comp
)
10327 if (c
->as
&& c_depth
== 0)
10330 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
)
10331 t_depth
= nonscalar_typebound_assign (c
->ts
.u
.derived
,
10336 c_depth
= t_depth
> c_depth
? t_depth
: c_depth
;
10338 return depth
+ c_depth
;
10342 /* Implement 7.2.1.3 of the F08 standard:
10343 "An intrinsic assignment where the variable is of derived type is
10344 performed as if each component of the variable were assigned from the
10345 corresponding component of expr using pointer assignment (7.2.2) for
10346 each pointer component, defined assignment for each nonpointer
10347 nonallocatable component of a type that has a type-bound defined
10348 assignment consistent with the component, intrinsic assignment for
10349 each other nonpointer nonallocatable component, ..."
10351 The pointer assignments are taken care of by the intrinsic
10352 assignment of the structure itself. This function recursively adds
10353 defined assignments where required. The recursion is accomplished
10354 by calling gfc_resolve_code.
10356 When the lhs in a defined assignment has intent INOUT, we need a
10357 temporary for the lhs. In pseudo-code:
10359 ! Only call function lhs once.
10360 if (lhs is not a constant or an variable)
10363 ! Do the intrinsic assignment
10365 ! Now do the defined assignments
10366 do over components with typebound defined assignment [%cmp]
10367 #if one component's assignment procedure is INOUT
10369 #if expr2 non-variable
10375 t1%cmp {defined=} expr2%cmp
10381 expr1%cmp {defined=} expr2%cmp
10385 /* The temporary assignments have to be put on top of the additional
10386 code to avoid the result being changed by the intrinsic assignment.
10388 static int component_assignment_level
= 0;
10389 static gfc_code
*tmp_head
= NULL
, *tmp_tail
= NULL
;
10392 generate_component_assignments (gfc_code
**code
, gfc_namespace
*ns
)
10394 gfc_component
*comp1
, *comp2
;
10395 gfc_code
*this_code
= NULL
, *head
= NULL
, *tail
= NULL
;
10397 int error_count
, depth
;
10399 gfc_get_errors (NULL
, &error_count
);
10401 /* Filter out continuing processing after an error. */
10403 || (*code
)->expr1
->ts
.type
!= BT_DERIVED
10404 || (*code
)->expr2
->ts
.type
!= BT_DERIVED
)
10407 /* TODO: Handle more than one part array reference in assignments. */
10408 depth
= nonscalar_typebound_assign ((*code
)->expr1
->ts
.u
.derived
,
10409 (*code
)->expr1
->rank
? 1 : 0);
10412 gfc_warning (0, "TODO: type-bound defined assignment(s) at %L not "
10413 "done because multiple part array references would "
10414 "occur in intermediate expressions.", &(*code
)->loc
);
10418 component_assignment_level
++;
10420 /* Create a temporary so that functions get called only once. */
10421 if ((*code
)->expr2
->expr_type
!= EXPR_VARIABLE
10422 && (*code
)->expr2
->expr_type
!= EXPR_CONSTANT
)
10424 gfc_expr
*tmp_expr
;
10426 /* Assign the rhs to the temporary. */
10427 tmp_expr
= get_temp_from_expr ((*code
)->expr1
, ns
);
10428 this_code
= build_assignment (EXEC_ASSIGN
,
10429 tmp_expr
, (*code
)->expr2
,
10430 NULL
, NULL
, (*code
)->loc
);
10431 /* Add the code and substitute the rhs expression. */
10432 add_code_to_chain (&this_code
, &tmp_head
, &tmp_tail
);
10433 gfc_free_expr ((*code
)->expr2
);
10434 (*code
)->expr2
= tmp_expr
;
10437 /* Do the intrinsic assignment. This is not needed if the lhs is one
10438 of the temporaries generated here, since the intrinsic assignment
10439 to the final result already does this. */
10440 if ((*code
)->expr1
->symtree
->n
.sym
->name
[2] != '@')
10442 this_code
= build_assignment (EXEC_ASSIGN
,
10443 (*code
)->expr1
, (*code
)->expr2
,
10444 NULL
, NULL
, (*code
)->loc
);
10445 add_code_to_chain (&this_code
, &head
, &tail
);
10448 comp1
= (*code
)->expr1
->ts
.u
.derived
->components
;
10449 comp2
= (*code
)->expr2
->ts
.u
.derived
->components
;
10452 for (; comp1
; comp1
= comp1
->next
, comp2
= comp2
->next
)
10454 bool inout
= false;
10456 /* The intrinsic assignment does the right thing for pointers
10457 of all kinds and allocatable components. */
10458 if (!gfc_bt_struct (comp1
->ts
.type
)
10459 || comp1
->attr
.pointer
10460 || comp1
->attr
.allocatable
10461 || comp1
->attr
.proc_pointer_comp
10462 || comp1
->attr
.class_pointer
10463 || comp1
->attr
.proc_pointer
)
10466 /* Make an assigment for this component. */
10467 this_code
= build_assignment (EXEC_ASSIGN
,
10468 (*code
)->expr1
, (*code
)->expr2
,
10469 comp1
, comp2
, (*code
)->loc
);
10471 /* Convert the assignment if there is a defined assignment for
10472 this type. Otherwise, using the call from gfc_resolve_code,
10473 recurse into its components. */
10474 gfc_resolve_code (this_code
, ns
);
10476 if (this_code
->op
== EXEC_ASSIGN_CALL
)
10478 gfc_formal_arglist
*dummy_args
;
10480 /* Check that there is a typebound defined assignment. If not,
10481 then this must be a module defined assignment. We cannot
10482 use the defined_assign_comp attribute here because it must
10483 be this derived type that has the defined assignment and not
10485 if (!(comp1
->ts
.u
.derived
->f2k_derived
10486 && comp1
->ts
.u
.derived
->f2k_derived
10487 ->tb_op
[INTRINSIC_ASSIGN
]))
10489 gfc_free_statements (this_code
);
10494 /* If the first argument of the subroutine has intent INOUT
10495 a temporary must be generated and used instead. */
10496 rsym
= this_code
->resolved_sym
;
10497 dummy_args
= gfc_sym_get_dummy_args (rsym
);
10499 && dummy_args
->sym
->attr
.intent
== INTENT_INOUT
)
10501 gfc_code
*temp_code
;
10504 /* Build the temporary required for the assignment and put
10505 it at the head of the generated code. */
10508 t1
= get_temp_from_expr ((*code
)->expr1
, ns
);
10509 temp_code
= build_assignment (EXEC_ASSIGN
,
10510 t1
, (*code
)->expr1
,
10511 NULL
, NULL
, (*code
)->loc
);
10513 /* For allocatable LHS, check whether it is allocated. Note
10514 that allocatable components with defined assignment are
10515 not yet support. See PR 57696. */
10516 if ((*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
)
10520 gfc_lval_expr_from_sym ((*code
)->expr1
->symtree
->n
.sym
);
10521 block
= gfc_get_code (EXEC_IF
);
10522 block
->block
= gfc_get_code (EXEC_IF
);
10523 block
->block
->expr1
10524 = gfc_build_intrinsic_call (ns
,
10525 GFC_ISYM_ALLOCATED
, "allocated",
10526 (*code
)->loc
, 1, e
);
10527 block
->block
->next
= temp_code
;
10530 add_code_to_chain (&temp_code
, &tmp_head
, &tmp_tail
);
10533 /* Replace the first actual arg with the component of the
10535 gfc_free_expr (this_code
->ext
.actual
->expr
);
10536 this_code
->ext
.actual
->expr
= gfc_copy_expr (t1
);
10537 add_comp_ref (this_code
->ext
.actual
->expr
, comp1
);
10539 /* If the LHS variable is allocatable and wasn't allocated and
10540 the temporary is allocatable, pointer assign the address of
10541 the freshly allocated LHS to the temporary. */
10542 if ((*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
10543 && gfc_expr_attr ((*code
)->expr1
).allocatable
)
10548 cond
= gfc_get_expr ();
10549 cond
->ts
.type
= BT_LOGICAL
;
10550 cond
->ts
.kind
= gfc_default_logical_kind
;
10551 cond
->expr_type
= EXPR_OP
;
10552 cond
->where
= (*code
)->loc
;
10553 cond
->value
.op
.op
= INTRINSIC_NOT
;
10554 cond
->value
.op
.op1
= gfc_build_intrinsic_call (ns
,
10555 GFC_ISYM_ALLOCATED
, "allocated",
10556 (*code
)->loc
, 1, gfc_copy_expr (t1
));
10557 block
= gfc_get_code (EXEC_IF
);
10558 block
->block
= gfc_get_code (EXEC_IF
);
10559 block
->block
->expr1
= cond
;
10560 block
->block
->next
= build_assignment (EXEC_POINTER_ASSIGN
,
10561 t1
, (*code
)->expr1
,
10562 NULL
, NULL
, (*code
)->loc
);
10563 add_code_to_chain (&block
, &head
, &tail
);
10567 else if (this_code
->op
== EXEC_ASSIGN
&& !this_code
->next
)
10569 /* Don't add intrinsic assignments since they are already
10570 effected by the intrinsic assignment of the structure. */
10571 gfc_free_statements (this_code
);
10576 add_code_to_chain (&this_code
, &head
, &tail
);
10580 /* Transfer the value to the final result. */
10581 this_code
= build_assignment (EXEC_ASSIGN
,
10582 (*code
)->expr1
, t1
,
10583 comp1
, comp2
, (*code
)->loc
);
10584 add_code_to_chain (&this_code
, &head
, &tail
);
10588 /* Put the temporary assignments at the top of the generated code. */
10589 if (tmp_head
&& component_assignment_level
== 1)
10591 gfc_append_code (tmp_head
, head
);
10593 tmp_head
= tmp_tail
= NULL
;
10596 // If we did a pointer assignment - thus, we need to ensure that the LHS is
10597 // not accidentally deallocated. Hence, nullify t1.
10598 if (t1
&& (*code
)->expr1
->symtree
->n
.sym
->attr
.allocatable
10599 && gfc_expr_attr ((*code
)->expr1
).allocatable
)
10605 e
= gfc_lval_expr_from_sym ((*code
)->expr1
->symtree
->n
.sym
);
10606 cond
= gfc_build_intrinsic_call (ns
, GFC_ISYM_ASSOCIATED
, "associated",
10607 (*code
)->loc
, 2, gfc_copy_expr (t1
), e
);
10608 block
= gfc_get_code (EXEC_IF
);
10609 block
->block
= gfc_get_code (EXEC_IF
);
10610 block
->block
->expr1
= cond
;
10611 block
->block
->next
= build_assignment (EXEC_POINTER_ASSIGN
,
10612 t1
, gfc_get_null_expr (&(*code
)->loc
),
10613 NULL
, NULL
, (*code
)->loc
);
10614 gfc_append_code (tail
, block
);
10618 /* Now attach the remaining code chain to the input code. Step on
10619 to the end of the new code since resolution is complete. */
10620 gcc_assert ((*code
)->op
== EXEC_ASSIGN
);
10621 tail
->next
= (*code
)->next
;
10622 /* Overwrite 'code' because this would place the intrinsic assignment
10623 before the temporary for the lhs is created. */
10624 gfc_free_expr ((*code
)->expr1
);
10625 gfc_free_expr ((*code
)->expr2
);
10631 component_assignment_level
--;
10635 /* F2008: Pointer function assignments are of the form:
10636 ptr_fcn (args) = expr
10637 This function breaks these assignments into two statements:
10638 temporary_pointer => ptr_fcn(args)
10639 temporary_pointer = expr */
10642 resolve_ptr_fcn_assign (gfc_code
**code
, gfc_namespace
*ns
)
10644 gfc_expr
*tmp_ptr_expr
;
10645 gfc_code
*this_code
;
10646 gfc_component
*comp
;
10649 if ((*code
)->expr1
->expr_type
!= EXPR_FUNCTION
)
10652 /* Even if standard does not support this feature, continue to build
10653 the two statements to avoid upsetting frontend_passes.c. */
10654 gfc_notify_std (GFC_STD_F2008
, "Pointer procedure assignment at "
10655 "%L", &(*code
)->loc
);
10657 comp
= gfc_get_proc_ptr_comp ((*code
)->expr1
);
10660 s
= comp
->ts
.interface
;
10662 s
= (*code
)->expr1
->symtree
->n
.sym
;
10664 if (s
== NULL
|| !s
->result
->attr
.pointer
)
10666 gfc_error ("The function result on the lhs of the assignment at "
10667 "%L must have the pointer attribute.",
10668 &(*code
)->expr1
->where
);
10669 (*code
)->op
= EXEC_NOP
;
10673 tmp_ptr_expr
= get_temp_from_expr ((*code
)->expr2
, ns
);
10675 /* get_temp_from_expression is set up for ordinary assignments. To that
10676 end, where array bounds are not known, arrays are made allocatable.
10677 Change the temporary to a pointer here. */
10678 tmp_ptr_expr
->symtree
->n
.sym
->attr
.pointer
= 1;
10679 tmp_ptr_expr
->symtree
->n
.sym
->attr
.allocatable
= 0;
10680 tmp_ptr_expr
->where
= (*code
)->loc
;
10682 this_code
= build_assignment (EXEC_ASSIGN
,
10683 tmp_ptr_expr
, (*code
)->expr2
,
10684 NULL
, NULL
, (*code
)->loc
);
10685 this_code
->next
= (*code
)->next
;
10686 (*code
)->next
= this_code
;
10687 (*code
)->op
= EXEC_POINTER_ASSIGN
;
10688 (*code
)->expr2
= (*code
)->expr1
;
10689 (*code
)->expr1
= tmp_ptr_expr
;
10695 /* Deferred character length assignments from an operator expression
10696 require a temporary because the character length of the lhs can
10697 change in the course of the assignment. */
10700 deferred_op_assign (gfc_code
**code
, gfc_namespace
*ns
)
10702 gfc_expr
*tmp_expr
;
10703 gfc_code
*this_code
;
10705 if (!((*code
)->expr1
->ts
.type
== BT_CHARACTER
10706 && (*code
)->expr1
->ts
.deferred
&& (*code
)->expr1
->rank
10707 && (*code
)->expr2
->expr_type
== EXPR_OP
))
10710 if (!gfc_check_dependency ((*code
)->expr1
, (*code
)->expr2
, 1))
10713 tmp_expr
= get_temp_from_expr ((*code
)->expr1
, ns
);
10714 tmp_expr
->where
= (*code
)->loc
;
10716 /* A new charlen is required to ensure that the variable string
10717 length is different to that of the original lhs. */
10718 tmp_expr
->ts
.u
.cl
= gfc_get_charlen();
10719 tmp_expr
->symtree
->n
.sym
->ts
.u
.cl
= tmp_expr
->ts
.u
.cl
;
10720 tmp_expr
->ts
.u
.cl
->next
= (*code
)->expr2
->ts
.u
.cl
->next
;
10721 (*code
)->expr2
->ts
.u
.cl
->next
= tmp_expr
->ts
.u
.cl
;
10723 tmp_expr
->symtree
->n
.sym
->ts
.deferred
= 1;
10725 this_code
= build_assignment (EXEC_ASSIGN
,
10727 gfc_copy_expr (tmp_expr
),
10728 NULL
, NULL
, (*code
)->loc
);
10730 (*code
)->expr1
= tmp_expr
;
10732 this_code
->next
= (*code
)->next
;
10733 (*code
)->next
= this_code
;
10739 /* Given a block of code, recursively resolve everything pointed to by this
10743 gfc_resolve_code (gfc_code
*code
, gfc_namespace
*ns
)
10745 int omp_workshare_save
;
10746 int forall_save
, do_concurrent_save
;
10750 frame
.prev
= cs_base
;
10754 find_reachable_labels (code
);
10756 for (; code
; code
= code
->next
)
10758 frame
.current
= code
;
10759 forall_save
= forall_flag
;
10760 do_concurrent_save
= gfc_do_concurrent_flag
;
10762 if (code
->op
== EXEC_FORALL
)
10765 gfc_resolve_forall (code
, ns
, forall_save
);
10768 else if (code
->block
)
10770 omp_workshare_save
= -1;
10773 case EXEC_OACC_PARALLEL_LOOP
:
10774 case EXEC_OACC_PARALLEL
:
10775 case EXEC_OACC_KERNELS_LOOP
:
10776 case EXEC_OACC_KERNELS
:
10777 case EXEC_OACC_DATA
:
10778 case EXEC_OACC_HOST_DATA
:
10779 case EXEC_OACC_LOOP
:
10780 gfc_resolve_oacc_blocks (code
, ns
);
10782 case EXEC_OMP_PARALLEL_WORKSHARE
:
10783 omp_workshare_save
= omp_workshare_flag
;
10784 omp_workshare_flag
= 1;
10785 gfc_resolve_omp_parallel_blocks (code
, ns
);
10787 case EXEC_OMP_PARALLEL
:
10788 case EXEC_OMP_PARALLEL_DO
:
10789 case EXEC_OMP_PARALLEL_DO_SIMD
:
10790 case EXEC_OMP_PARALLEL_SECTIONS
:
10791 case EXEC_OMP_TARGET_PARALLEL
:
10792 case EXEC_OMP_TARGET_PARALLEL_DO
:
10793 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
10794 case EXEC_OMP_TARGET_TEAMS
:
10795 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
10796 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
10797 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
10798 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
10799 case EXEC_OMP_TASK
:
10800 case EXEC_OMP_TEAMS
:
10801 case EXEC_OMP_TEAMS_DISTRIBUTE
:
10802 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
10803 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
10804 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
10805 omp_workshare_save
= omp_workshare_flag
;
10806 omp_workshare_flag
= 0;
10807 gfc_resolve_omp_parallel_blocks (code
, ns
);
10809 case EXEC_OMP_DISTRIBUTE
:
10810 case EXEC_OMP_DISTRIBUTE_SIMD
:
10812 case EXEC_OMP_DO_SIMD
:
10813 case EXEC_OMP_SIMD
:
10814 case EXEC_OMP_TARGET_SIMD
:
10815 case EXEC_OMP_TASKLOOP
:
10816 case EXEC_OMP_TASKLOOP_SIMD
:
10817 gfc_resolve_omp_do_blocks (code
, ns
);
10819 case EXEC_SELECT_TYPE
:
10820 /* Blocks are handled in resolve_select_type because we have
10821 to transform the SELECT TYPE into ASSOCIATE first. */
10823 case EXEC_DO_CONCURRENT
:
10824 gfc_do_concurrent_flag
= 1;
10825 gfc_resolve_blocks (code
->block
, ns
);
10826 gfc_do_concurrent_flag
= 2;
10828 case EXEC_OMP_WORKSHARE
:
10829 omp_workshare_save
= omp_workshare_flag
;
10830 omp_workshare_flag
= 1;
10833 gfc_resolve_blocks (code
->block
, ns
);
10837 if (omp_workshare_save
!= -1)
10838 omp_workshare_flag
= omp_workshare_save
;
10842 if (code
->op
!= EXEC_COMPCALL
&& code
->op
!= EXEC_CALL_PPC
)
10843 t
= gfc_resolve_expr (code
->expr1
);
10844 forall_flag
= forall_save
;
10845 gfc_do_concurrent_flag
= do_concurrent_save
;
10847 if (!gfc_resolve_expr (code
->expr2
))
10850 if (code
->op
== EXEC_ALLOCATE
10851 && !gfc_resolve_expr (code
->expr3
))
10857 case EXEC_END_BLOCK
:
10858 case EXEC_END_NESTED_BLOCK
:
10862 case EXEC_ERROR_STOP
:
10864 case EXEC_CONTINUE
:
10866 case EXEC_ASSIGN_CALL
:
10869 case EXEC_CRITICAL
:
10870 resolve_critical (code
);
10873 case EXEC_SYNC_ALL
:
10874 case EXEC_SYNC_IMAGES
:
10875 case EXEC_SYNC_MEMORY
:
10876 resolve_sync (code
);
10881 case EXEC_EVENT_POST
:
10882 case EXEC_EVENT_WAIT
:
10883 resolve_lock_unlock_event (code
);
10887 /* Keep track of which entry we are up to. */
10888 current_entry_id
= code
->ext
.entry
->id
;
10892 resolve_where (code
, NULL
);
10896 if (code
->expr1
!= NULL
)
10898 if (code
->expr1
->ts
.type
!= BT_INTEGER
)
10899 gfc_error ("ASSIGNED GOTO statement at %L requires an "
10900 "INTEGER variable", &code
->expr1
->where
);
10901 else if (code
->expr1
->symtree
->n
.sym
->attr
.assign
!= 1)
10902 gfc_error ("Variable %qs has not been assigned a target "
10903 "label at %L", code
->expr1
->symtree
->n
.sym
->name
,
10904 &code
->expr1
->where
);
10907 resolve_branch (code
->label1
, code
);
10911 if (code
->expr1
!= NULL
10912 && (code
->expr1
->ts
.type
!= BT_INTEGER
|| code
->expr1
->rank
))
10913 gfc_error ("Alternate RETURN statement at %L requires a SCALAR-"
10914 "INTEGER return specifier", &code
->expr1
->where
);
10917 case EXEC_INIT_ASSIGN
:
10918 case EXEC_END_PROCEDURE
:
10925 /* Remove a GFC_ISYM_CAF_GET inserted for a coindexed variable on
10927 if (code
->expr1
->expr_type
== EXPR_FUNCTION
10928 && code
->expr1
->value
.function
.isym
10929 && code
->expr1
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
10930 remove_caf_get_intrinsic (code
->expr1
);
10932 /* If this is a pointer function in an lvalue variable context,
10933 the new code will have to be resolved afresh. This is also the
10934 case with an error, where the code is transformed into NOP to
10935 prevent ICEs downstream. */
10936 if (resolve_ptr_fcn_assign (&code
, ns
)
10937 || code
->op
== EXEC_NOP
)
10940 if (!gfc_check_vardef_context (code
->expr1
, false, false, false,
10944 if (resolve_ordinary_assign (code
, ns
))
10946 if (code
->op
== EXEC_COMPCALL
)
10952 /* Check for dependencies in deferred character length array
10953 assignments and generate a temporary, if necessary. */
10954 if (code
->op
== EXEC_ASSIGN
&& deferred_op_assign (&code
, ns
))
10957 /* F03 7.4.1.3 for non-allocatable, non-pointer components. */
10958 if (code
->op
!= EXEC_CALL
&& code
->expr1
->ts
.type
== BT_DERIVED
10959 && code
->expr1
->ts
.u
.derived
10960 && code
->expr1
->ts
.u
.derived
->attr
.defined_assign_comp
)
10961 generate_component_assignments (&code
, ns
);
10965 case EXEC_LABEL_ASSIGN
:
10966 if (code
->label1
->defined
== ST_LABEL_UNKNOWN
)
10967 gfc_error ("Label %d referenced at %L is never defined",
10968 code
->label1
->value
, &code
->label1
->where
);
10970 && (code
->expr1
->expr_type
!= EXPR_VARIABLE
10971 || code
->expr1
->symtree
->n
.sym
->ts
.type
!= BT_INTEGER
10972 || code
->expr1
->symtree
->n
.sym
->ts
.kind
10973 != gfc_default_integer_kind
10974 || code
->expr1
->symtree
->n
.sym
->as
!= NULL
))
10975 gfc_error ("ASSIGN statement at %L requires a scalar "
10976 "default INTEGER variable", &code
->expr1
->where
);
10979 case EXEC_POINTER_ASSIGN
:
10986 /* This is both a variable definition and pointer assignment
10987 context, so check both of them. For rank remapping, a final
10988 array ref may be present on the LHS and fool gfc_expr_attr
10989 used in gfc_check_vardef_context. Remove it. */
10990 e
= remove_last_array_ref (code
->expr1
);
10991 t
= gfc_check_vardef_context (e
, true, false, false,
10992 _("pointer assignment"));
10994 t
= gfc_check_vardef_context (e
, false, false, false,
10995 _("pointer assignment"));
11000 gfc_check_pointer_assign (code
->expr1
, code
->expr2
);
11002 /* Assigning a class object always is a regular assign. */
11003 if (code
->expr2
->ts
.type
== BT_CLASS
11004 && !CLASS_DATA (code
->expr2
)->attr
.dimension
11005 && !(UNLIMITED_POLY (code
->expr2
)
11006 && code
->expr1
->ts
.type
== BT_DERIVED
11007 && (code
->expr1
->ts
.u
.derived
->attr
.sequence
11008 || code
->expr1
->ts
.u
.derived
->attr
.is_bind_c
))
11009 && !(gfc_expr_attr (code
->expr1
).proc_pointer
11010 && code
->expr2
->expr_type
== EXPR_VARIABLE
11011 && code
->expr2
->symtree
->n
.sym
->attr
.flavor
11013 code
->op
= EXEC_ASSIGN
;
11017 case EXEC_ARITHMETIC_IF
:
11019 gfc_expr
*e
= code
->expr1
;
11021 gfc_resolve_expr (e
);
11022 if (e
->expr_type
== EXPR_NULL
)
11023 gfc_error ("Invalid NULL at %L", &e
->where
);
11025 if (t
&& (e
->rank
> 0
11026 || !(e
->ts
.type
== BT_REAL
|| e
->ts
.type
== BT_INTEGER
)))
11027 gfc_error ("Arithmetic IF statement at %L requires a scalar "
11028 "REAL or INTEGER expression", &e
->where
);
11030 resolve_branch (code
->label1
, code
);
11031 resolve_branch (code
->label2
, code
);
11032 resolve_branch (code
->label3
, code
);
11037 if (t
&& code
->expr1
!= NULL
11038 && (code
->expr1
->ts
.type
!= BT_LOGICAL
11039 || code
->expr1
->rank
!= 0))
11040 gfc_error ("IF clause at %L requires a scalar LOGICAL expression",
11041 &code
->expr1
->where
);
11046 resolve_call (code
);
11049 case EXEC_COMPCALL
:
11051 resolve_typebound_subroutine (code
);
11054 case EXEC_CALL_PPC
:
11055 resolve_ppc_call (code
);
11059 /* Select is complicated. Also, a SELECT construct could be
11060 a transformed computed GOTO. */
11061 resolve_select (code
, false);
11064 case EXEC_SELECT_TYPE
:
11065 resolve_select_type (code
, ns
);
11069 resolve_block_construct (code
);
11073 if (code
->ext
.iterator
!= NULL
)
11075 gfc_iterator
*iter
= code
->ext
.iterator
;
11076 if (gfc_resolve_iterator (iter
, true, false))
11077 gfc_resolve_do_iterator (code
, iter
->var
->symtree
->n
.sym
);
11081 case EXEC_DO_WHILE
:
11082 if (code
->expr1
== NULL
)
11083 gfc_internal_error ("gfc_resolve_code(): No expression on "
11086 && (code
->expr1
->rank
!= 0
11087 || code
->expr1
->ts
.type
!= BT_LOGICAL
))
11088 gfc_error ("Exit condition of DO WHILE loop at %L must be "
11089 "a scalar LOGICAL expression", &code
->expr1
->where
);
11092 case EXEC_ALLOCATE
:
11094 resolve_allocate_deallocate (code
, "ALLOCATE");
11098 case EXEC_DEALLOCATE
:
11100 resolve_allocate_deallocate (code
, "DEALLOCATE");
11105 if (!gfc_resolve_open (code
->ext
.open
))
11108 resolve_branch (code
->ext
.open
->err
, code
);
11112 if (!gfc_resolve_close (code
->ext
.close
))
11115 resolve_branch (code
->ext
.close
->err
, code
);
11118 case EXEC_BACKSPACE
:
11122 if (!gfc_resolve_filepos (code
->ext
.filepos
))
11125 resolve_branch (code
->ext
.filepos
->err
, code
);
11129 if (!gfc_resolve_inquire (code
->ext
.inquire
))
11132 resolve_branch (code
->ext
.inquire
->err
, code
);
11135 case EXEC_IOLENGTH
:
11136 gcc_assert (code
->ext
.inquire
!= NULL
);
11137 if (!gfc_resolve_inquire (code
->ext
.inquire
))
11140 resolve_branch (code
->ext
.inquire
->err
, code
);
11144 if (!gfc_resolve_wait (code
->ext
.wait
))
11147 resolve_branch (code
->ext
.wait
->err
, code
);
11148 resolve_branch (code
->ext
.wait
->end
, code
);
11149 resolve_branch (code
->ext
.wait
->eor
, code
);
11154 if (!gfc_resolve_dt (code
->ext
.dt
, &code
->loc
))
11157 resolve_branch (code
->ext
.dt
->err
, code
);
11158 resolve_branch (code
->ext
.dt
->end
, code
);
11159 resolve_branch (code
->ext
.dt
->eor
, code
);
11162 case EXEC_TRANSFER
:
11163 resolve_transfer (code
);
11166 case EXEC_DO_CONCURRENT
:
11168 resolve_forall_iterators (code
->ext
.forall_iterator
);
11170 if (code
->expr1
!= NULL
11171 && (code
->expr1
->ts
.type
!= BT_LOGICAL
|| code
->expr1
->rank
))
11172 gfc_error ("FORALL mask clause at %L requires a scalar LOGICAL "
11173 "expression", &code
->expr1
->where
);
11176 case EXEC_OACC_PARALLEL_LOOP
:
11177 case EXEC_OACC_PARALLEL
:
11178 case EXEC_OACC_KERNELS_LOOP
:
11179 case EXEC_OACC_KERNELS
:
11180 case EXEC_OACC_DATA
:
11181 case EXEC_OACC_HOST_DATA
:
11182 case EXEC_OACC_LOOP
:
11183 case EXEC_OACC_UPDATE
:
11184 case EXEC_OACC_WAIT
:
11185 case EXEC_OACC_CACHE
:
11186 case EXEC_OACC_ENTER_DATA
:
11187 case EXEC_OACC_EXIT_DATA
:
11188 case EXEC_OACC_ATOMIC
:
11189 case EXEC_OACC_DECLARE
:
11190 gfc_resolve_oacc_directive (code
, ns
);
11193 case EXEC_OMP_ATOMIC
:
11194 case EXEC_OMP_BARRIER
:
11195 case EXEC_OMP_CANCEL
:
11196 case EXEC_OMP_CANCELLATION_POINT
:
11197 case EXEC_OMP_CRITICAL
:
11198 case EXEC_OMP_FLUSH
:
11199 case EXEC_OMP_DISTRIBUTE
:
11200 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO
:
11201 case EXEC_OMP_DISTRIBUTE_PARALLEL_DO_SIMD
:
11202 case EXEC_OMP_DISTRIBUTE_SIMD
:
11204 case EXEC_OMP_DO_SIMD
:
11205 case EXEC_OMP_MASTER
:
11206 case EXEC_OMP_ORDERED
:
11207 case EXEC_OMP_SECTIONS
:
11208 case EXEC_OMP_SIMD
:
11209 case EXEC_OMP_SINGLE
:
11210 case EXEC_OMP_TARGET
:
11211 case EXEC_OMP_TARGET_DATA
:
11212 case EXEC_OMP_TARGET_ENTER_DATA
:
11213 case EXEC_OMP_TARGET_EXIT_DATA
:
11214 case EXEC_OMP_TARGET_PARALLEL
:
11215 case EXEC_OMP_TARGET_PARALLEL_DO
:
11216 case EXEC_OMP_TARGET_PARALLEL_DO_SIMD
:
11217 case EXEC_OMP_TARGET_SIMD
:
11218 case EXEC_OMP_TARGET_TEAMS
:
11219 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE
:
11220 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11221 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11222 case EXEC_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD
:
11223 case EXEC_OMP_TARGET_UPDATE
:
11224 case EXEC_OMP_TASK
:
11225 case EXEC_OMP_TASKGROUP
:
11226 case EXEC_OMP_TASKLOOP
:
11227 case EXEC_OMP_TASKLOOP_SIMD
:
11228 case EXEC_OMP_TASKWAIT
:
11229 case EXEC_OMP_TASKYIELD
:
11230 case EXEC_OMP_TEAMS
:
11231 case EXEC_OMP_TEAMS_DISTRIBUTE
:
11232 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO
:
11233 case EXEC_OMP_TEAMS_DISTRIBUTE_PARALLEL_DO_SIMD
:
11234 case EXEC_OMP_TEAMS_DISTRIBUTE_SIMD
:
11235 case EXEC_OMP_WORKSHARE
:
11236 gfc_resolve_omp_directive (code
, ns
);
11239 case EXEC_OMP_PARALLEL
:
11240 case EXEC_OMP_PARALLEL_DO
:
11241 case EXEC_OMP_PARALLEL_DO_SIMD
:
11242 case EXEC_OMP_PARALLEL_SECTIONS
:
11243 case EXEC_OMP_PARALLEL_WORKSHARE
:
11244 omp_workshare_save
= omp_workshare_flag
;
11245 omp_workshare_flag
= 0;
11246 gfc_resolve_omp_directive (code
, ns
);
11247 omp_workshare_flag
= omp_workshare_save
;
11251 gfc_internal_error ("gfc_resolve_code(): Bad statement code");
11255 cs_base
= frame
.prev
;
11259 /* Resolve initial values and make sure they are compatible with
11263 resolve_values (gfc_symbol
*sym
)
11267 if (sym
->value
== NULL
)
11270 if (sym
->value
->expr_type
== EXPR_STRUCTURE
)
11271 t
= resolve_structure_cons (sym
->value
, 1);
11273 t
= gfc_resolve_expr (sym
->value
);
11278 gfc_check_assign_symbol (sym
, NULL
, sym
->value
);
11282 /* Verify any BIND(C) derived types in the namespace so we can report errors
11283 for them once, rather than for each variable declared of that type. */
11286 resolve_bind_c_derived_types (gfc_symbol
*derived_sym
)
11288 if (derived_sym
!= NULL
&& derived_sym
->attr
.flavor
== FL_DERIVED
11289 && derived_sym
->attr
.is_bind_c
== 1)
11290 verify_bind_c_derived_type (derived_sym
);
11296 /* Check the interfaces of DTIO procedures associated with derived
11297 type 'sym'. These procedures can either have typebound bindings or
11298 can appear in DTIO generic interfaces. */
11301 gfc_verify_DTIO_procedures (gfc_symbol
*sym
)
11303 if (!sym
|| sym
->attr
.flavor
!= FL_DERIVED
)
11306 gfc_check_dtio_interfaces (sym
);
11311 /* Verify that any binding labels used in a given namespace do not collide
11312 with the names or binding labels of any global symbols. Multiple INTERFACE
11313 for the same procedure are permitted. */
11316 gfc_verify_binding_labels (gfc_symbol
*sym
)
11319 const char *module
;
11321 if (!sym
|| !sym
->attr
.is_bind_c
|| sym
->attr
.is_iso_c
11322 || sym
->attr
.flavor
== FL_DERIVED
|| !sym
->binding_label
)
11325 gsym
= gfc_find_gsymbol (gfc_gsym_root
, sym
->binding_label
);
11328 module
= sym
->module
;
11329 else if (sym
->ns
&& sym
->ns
->proc_name
11330 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
)
11331 module
= sym
->ns
->proc_name
->name
;
11332 else if (sym
->ns
&& sym
->ns
->parent
11333 && sym
->ns
&& sym
->ns
->parent
->proc_name
11334 && sym
->ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
)
11335 module
= sym
->ns
->parent
->proc_name
->name
;
11341 && (gsym
->type
== GSYM_FUNCTION
|| gsym
->type
== GSYM_SUBROUTINE
)))
11344 gsym
= gfc_get_gsymbol (sym
->binding_label
);
11345 gsym
->where
= sym
->declared_at
;
11346 gsym
->sym_name
= sym
->name
;
11347 gsym
->binding_label
= sym
->binding_label
;
11348 gsym
->ns
= sym
->ns
;
11349 gsym
->mod_name
= module
;
11350 if (sym
->attr
.function
)
11351 gsym
->type
= GSYM_FUNCTION
;
11352 else if (sym
->attr
.subroutine
)
11353 gsym
->type
= GSYM_SUBROUTINE
;
11354 /* Mark as variable/procedure as defined, unless its an INTERFACE. */
11355 gsym
->defined
= sym
->attr
.if_source
!= IFSRC_IFBODY
;
11359 if (sym
->attr
.flavor
== FL_VARIABLE
&& gsym
->type
!= GSYM_UNKNOWN
)
11361 gfc_error ("Variable %s with binding label %s at %L uses the same global "
11362 "identifier as entity at %L", sym
->name
,
11363 sym
->binding_label
, &sym
->declared_at
, &gsym
->where
);
11364 /* Clear the binding label to prevent checking multiple times. */
11365 sym
->binding_label
= NULL
;
11368 else if (sym
->attr
.flavor
== FL_VARIABLE
&& module
11369 && (strcmp (module
, gsym
->mod_name
) != 0
11370 || strcmp (sym
->name
, gsym
->sym_name
) != 0))
11372 /* This can only happen if the variable is defined in a module - if it
11373 isn't the same module, reject it. */
11374 gfc_error ("Variable %s from module %s with binding label %s at %L uses "
11375 "the same global identifier as entity at %L from module %s",
11376 sym
->name
, module
, sym
->binding_label
,
11377 &sym
->declared_at
, &gsym
->where
, gsym
->mod_name
);
11378 sym
->binding_label
= NULL
;
11380 else if ((sym
->attr
.function
|| sym
->attr
.subroutine
)
11381 && ((gsym
->type
!= GSYM_SUBROUTINE
&& gsym
->type
!= GSYM_FUNCTION
)
11382 || (gsym
->defined
&& sym
->attr
.if_source
!= IFSRC_IFBODY
))
11383 && sym
!= gsym
->ns
->proc_name
11384 && (module
!= gsym
->mod_name
11385 || strcmp (gsym
->sym_name
, sym
->name
) != 0
11386 || (module
&& strcmp (module
, gsym
->mod_name
) != 0)))
11388 /* Print an error if the procedure is defined multiple times; we have to
11389 exclude references to the same procedure via module association or
11390 multiple checks for the same procedure. */
11391 gfc_error ("Procedure %s with binding label %s at %L uses the same "
11392 "global identifier as entity at %L", sym
->name
,
11393 sym
->binding_label
, &sym
->declared_at
, &gsym
->where
);
11394 sym
->binding_label
= NULL
;
11399 /* Resolve an index expression. */
11402 resolve_index_expr (gfc_expr
*e
)
11404 if (!gfc_resolve_expr (e
))
11407 if (!gfc_simplify_expr (e
, 0))
11410 if (!gfc_specification_expr (e
))
11417 /* Resolve a charlen structure. */
11420 resolve_charlen (gfc_charlen
*cl
)
11423 bool saved_specification_expr
;
11429 saved_specification_expr
= specification_expr
;
11430 specification_expr
= true;
11432 if (cl
->length_from_typespec
)
11434 if (!gfc_resolve_expr (cl
->length
))
11436 specification_expr
= saved_specification_expr
;
11440 if (!gfc_simplify_expr (cl
->length
, 0))
11442 specification_expr
= saved_specification_expr
;
11449 if (!resolve_index_expr (cl
->length
))
11451 specification_expr
= saved_specification_expr
;
11456 /* F2008, 4.4.3.2: If the character length parameter value evaluates to
11457 a negative value, the length of character entities declared is zero. */
11458 if (cl
->length
&& !gfc_extract_int (cl
->length
, &i
) && i
< 0)
11459 gfc_replace_expr (cl
->length
,
11460 gfc_get_int_expr (gfc_default_integer_kind
, NULL
, 0));
11462 /* Check that the character length is not too large. */
11463 k
= gfc_validate_kind (BT_INTEGER
, gfc_charlen_int_kind
, false);
11464 if (cl
->length
&& cl
->length
->expr_type
== EXPR_CONSTANT
11465 && cl
->length
->ts
.type
== BT_INTEGER
11466 && mpz_cmp (cl
->length
->value
.integer
, gfc_integer_kinds
[k
].huge
) > 0)
11468 gfc_error ("String length at %L is too large", &cl
->length
->where
);
11469 specification_expr
= saved_specification_expr
;
11473 specification_expr
= saved_specification_expr
;
11478 /* Test for non-constant shape arrays. */
11481 is_non_constant_shape_array (gfc_symbol
*sym
)
11487 not_constant
= false;
11488 if (sym
->as
!= NULL
)
11490 /* Unfortunately, !gfc_is_compile_time_shape hits a legal case that
11491 has not been simplified; parameter array references. Do the
11492 simplification now. */
11493 for (i
= 0; i
< sym
->as
->rank
+ sym
->as
->corank
; i
++)
11495 e
= sym
->as
->lower
[i
];
11496 if (e
&& (!resolve_index_expr(e
)
11497 || !gfc_is_constant_expr (e
)))
11498 not_constant
= true;
11499 e
= sym
->as
->upper
[i
];
11500 if (e
&& (!resolve_index_expr(e
)
11501 || !gfc_is_constant_expr (e
)))
11502 not_constant
= true;
11505 return not_constant
;
11508 /* Given a symbol and an initialization expression, add code to initialize
11509 the symbol to the function entry. */
11511 build_init_assign (gfc_symbol
*sym
, gfc_expr
*init
)
11515 gfc_namespace
*ns
= sym
->ns
;
11517 /* Search for the function namespace if this is a contained
11518 function without an explicit result. */
11519 if (sym
->attr
.function
&& sym
== sym
->result
11520 && sym
->name
!= sym
->ns
->proc_name
->name
)
11522 ns
= ns
->contained
;
11523 for (;ns
; ns
= ns
->sibling
)
11524 if (strcmp (ns
->proc_name
->name
, sym
->name
) == 0)
11530 gfc_free_expr (init
);
11534 /* Build an l-value expression for the result. */
11535 lval
= gfc_lval_expr_from_sym (sym
);
11537 /* Add the code at scope entry. */
11538 init_st
= gfc_get_code (EXEC_INIT_ASSIGN
);
11539 init_st
->next
= ns
->code
;
11540 ns
->code
= init_st
;
11542 /* Assign the default initializer to the l-value. */
11543 init_st
->loc
= sym
->declared_at
;
11544 init_st
->expr1
= lval
;
11545 init_st
->expr2
= init
;
11549 /* Whether or not we can generate a default initializer for a symbol. */
11552 can_generate_init (gfc_symbol
*sym
)
11554 symbol_attribute
*a
;
11559 /* These symbols should never have a default initialization. */
11564 || (sym
->ts
.type
== BT_CLASS
&& CLASS_DATA (sym
)
11565 && (CLASS_DATA (sym
)->attr
.class_pointer
11566 || CLASS_DATA (sym
)->attr
.proc_pointer
))
11567 || a
->in_equivalence
11574 || (!a
->referenced
&& !a
->result
)
11575 || (a
->dummy
&& a
->intent
!= INTENT_OUT
)
11576 || (a
->function
&& sym
!= sym
->result
)
11581 /* Assign the default initializer to a derived type variable or result. */
11584 apply_default_init (gfc_symbol
*sym
)
11586 gfc_expr
*init
= NULL
;
11588 if (sym
->attr
.flavor
!= FL_VARIABLE
&& !sym
->attr
.function
)
11591 if (sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
)
11592 init
= gfc_generate_initializer (&sym
->ts
, can_generate_init (sym
));
11594 if (init
== NULL
&& sym
->ts
.type
!= BT_CLASS
)
11597 build_init_assign (sym
, init
);
11598 sym
->attr
.referenced
= 1;
11602 /* Build an initializer for a local. Returns null if the symbol should not have
11603 a default initialization. */
11606 build_default_init_expr (gfc_symbol
*sym
)
11608 /* These symbols should never have a default initialization. */
11609 if (sym
->attr
.allocatable
11610 || sym
->attr
.external
11612 || sym
->attr
.pointer
11613 || sym
->attr
.in_equivalence
11614 || sym
->attr
.in_common
11617 || sym
->attr
.cray_pointee
11618 || sym
->attr
.cray_pointer
11622 /* Get the appropriate init expression. */
11623 return gfc_build_default_init_expr (&sym
->ts
, &sym
->declared_at
);
11626 /* Add an initialization expression to a local variable. */
11628 apply_default_init_local (gfc_symbol
*sym
)
11630 gfc_expr
*init
= NULL
;
11632 /* The symbol should be a variable or a function return value. */
11633 if ((sym
->attr
.flavor
!= FL_VARIABLE
&& !sym
->attr
.function
)
11634 || (sym
->attr
.function
&& sym
->result
!= sym
))
11637 /* Try to build the initializer expression. If we can't initialize
11638 this symbol, then init will be NULL. */
11639 init
= build_default_init_expr (sym
);
11643 /* For saved variables, we don't want to add an initializer at function
11644 entry, so we just add a static initializer. Note that automatic variables
11645 are stack allocated even with -fno-automatic; we have also to exclude
11646 result variable, which are also nonstatic. */
11647 if (!sym
->attr
.automatic
11648 && (sym
->attr
.save
|| sym
->ns
->save_all
11649 || (flag_max_stack_var_size
== 0 && !sym
->attr
.result
11650 && (sym
->ns
->proc_name
&& !sym
->ns
->proc_name
->attr
.recursive
)
11651 && (!sym
->attr
.dimension
|| !is_non_constant_shape_array (sym
)))))
11653 /* Don't clobber an existing initializer! */
11654 gcc_assert (sym
->value
== NULL
);
11659 build_init_assign (sym
, init
);
11663 /* Resolution of common features of flavors variable and procedure. */
11666 resolve_fl_var_and_proc (gfc_symbol
*sym
, int mp_flag
)
11668 gfc_array_spec
*as
;
11670 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
11671 as
= CLASS_DATA (sym
)->as
;
11675 /* Constraints on deferred shape variable. */
11676 if (as
== NULL
|| as
->type
!= AS_DEFERRED
)
11678 bool pointer
, allocatable
, dimension
;
11680 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
11682 pointer
= CLASS_DATA (sym
)->attr
.class_pointer
;
11683 allocatable
= CLASS_DATA (sym
)->attr
.allocatable
;
11684 dimension
= CLASS_DATA (sym
)->attr
.dimension
;
11688 pointer
= sym
->attr
.pointer
&& !sym
->attr
.select_type_temporary
;
11689 allocatable
= sym
->attr
.allocatable
;
11690 dimension
= sym
->attr
.dimension
;
11695 if (dimension
&& as
->type
!= AS_ASSUMED_RANK
)
11697 gfc_error ("Allocatable array %qs at %L must have a deferred "
11698 "shape or assumed rank", sym
->name
, &sym
->declared_at
);
11701 else if (!gfc_notify_std (GFC_STD_F2003
, "Scalar object "
11702 "%qs at %L may not be ALLOCATABLE",
11703 sym
->name
, &sym
->declared_at
))
11707 if (pointer
&& dimension
&& as
->type
!= AS_ASSUMED_RANK
)
11709 gfc_error ("Array pointer %qs at %L must have a deferred shape or "
11710 "assumed rank", sym
->name
, &sym
->declared_at
);
11716 if (!mp_flag
&& !sym
->attr
.allocatable
&& !sym
->attr
.pointer
11717 && sym
->ts
.type
!= BT_CLASS
&& !sym
->assoc
)
11719 gfc_error ("Array %qs at %L cannot have a deferred shape",
11720 sym
->name
, &sym
->declared_at
);
11725 /* Constraints on polymorphic variables. */
11726 if (sym
->ts
.type
== BT_CLASS
&& !(sym
->result
&& sym
->result
!= sym
))
11729 if (sym
->attr
.class_ok
11730 && !sym
->attr
.select_type_temporary
11731 && !UNLIMITED_POLY (sym
)
11732 && !gfc_type_is_extensible (CLASS_DATA (sym
)->ts
.u
.derived
))
11734 gfc_error ("Type %qs of CLASS variable %qs at %L is not extensible",
11735 CLASS_DATA (sym
)->ts
.u
.derived
->name
, sym
->name
,
11736 &sym
->declared_at
);
11741 /* Assume that use associated symbols were checked in the module ns.
11742 Class-variables that are associate-names are also something special
11743 and excepted from the test. */
11744 if (!sym
->attr
.class_ok
&& !sym
->attr
.use_assoc
&& !sym
->assoc
)
11746 gfc_error ("CLASS variable %qs at %L must be dummy, allocatable "
11747 "or pointer", sym
->name
, &sym
->declared_at
);
11756 /* Additional checks for symbols with flavor variable and derived
11757 type. To be called from resolve_fl_variable. */
11760 resolve_fl_variable_derived (gfc_symbol
*sym
, int no_init_flag
)
11762 gcc_assert (sym
->ts
.type
== BT_DERIVED
|| sym
->ts
.type
== BT_CLASS
);
11764 /* Check to see if a derived type is blocked from being host
11765 associated by the presence of another class I symbol in the same
11766 namespace. 14.6.1.3 of the standard and the discussion on
11767 comp.lang.fortran. */
11768 if (sym
->ns
!= sym
->ts
.u
.derived
->ns
11769 && sym
->ns
->proc_name
->attr
.if_source
!= IFSRC_IFBODY
)
11772 gfc_find_symbol (sym
->ts
.u
.derived
->name
, sym
->ns
, 0, &s
);
11773 if (s
&& s
->attr
.generic
)
11774 s
= gfc_find_dt_in_generic (s
);
11775 if (s
&& !gfc_fl_struct (s
->attr
.flavor
))
11777 gfc_error ("The type %qs cannot be host associated at %L "
11778 "because it is blocked by an incompatible object "
11779 "of the same name declared at %L",
11780 sym
->ts
.u
.derived
->name
, &sym
->declared_at
,
11786 /* 4th constraint in section 11.3: "If an object of a type for which
11787 component-initialization is specified (R429) appears in the
11788 specification-part of a module and does not have the ALLOCATABLE
11789 or POINTER attribute, the object shall have the SAVE attribute."
11791 The check for initializers is performed with
11792 gfc_has_default_initializer because gfc_default_initializer generates
11793 a hidden default for allocatable components. */
11794 if (!(sym
->value
|| no_init_flag
) && sym
->ns
->proc_name
11795 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
11796 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
) && !sym
->attr
.save
11797 && !sym
->attr
.pointer
&& !sym
->attr
.allocatable
11798 && gfc_has_default_initializer (sym
->ts
.u
.derived
)
11799 && !gfc_notify_std (GFC_STD_F2008
, "Implied SAVE for module variable "
11800 "%qs at %L, needed due to the default "
11801 "initialization", sym
->name
, &sym
->declared_at
))
11804 /* Assign default initializer. */
11805 if (!(sym
->value
|| sym
->attr
.pointer
|| sym
->attr
.allocatable
)
11806 && (!no_init_flag
|| sym
->attr
.intent
== INTENT_OUT
))
11807 sym
->value
= gfc_generate_initializer (&sym
->ts
, can_generate_init (sym
));
11813 /* F2008, C402 (R401): A colon shall not be used as a type-param-value
11814 except in the declaration of an entity or component that has the POINTER
11815 or ALLOCATABLE attribute. */
11818 deferred_requirements (gfc_symbol
*sym
)
11820 if (sym
->ts
.deferred
11821 && !(sym
->attr
.pointer
11822 || sym
->attr
.allocatable
11823 || sym
->attr
.omp_udr_artificial_var
))
11825 gfc_error ("Entity %qs at %L has a deferred type parameter and "
11826 "requires either the POINTER or ALLOCATABLE attribute",
11827 sym
->name
, &sym
->declared_at
);
11834 /* Resolve symbols with flavor variable. */
11837 resolve_fl_variable (gfc_symbol
*sym
, int mp_flag
)
11839 int no_init_flag
, automatic_flag
;
11841 const char *auto_save_msg
;
11842 bool saved_specification_expr
;
11844 auto_save_msg
= "Automatic object %qs at %L cannot have the "
11847 if (!resolve_fl_var_and_proc (sym
, mp_flag
))
11850 /* Set this flag to check that variables are parameters of all entries.
11851 This check is effected by the call to gfc_resolve_expr through
11852 is_non_constant_shape_array. */
11853 saved_specification_expr
= specification_expr
;
11854 specification_expr
= true;
11856 if (sym
->ns
->proc_name
11857 && (sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
11858 || sym
->ns
->proc_name
->attr
.is_main_program
)
11859 && !sym
->attr
.use_assoc
11860 && !sym
->attr
.allocatable
11861 && !sym
->attr
.pointer
11862 && is_non_constant_shape_array (sym
))
11864 /* F08:C541. The shape of an array defined in a main program or module
11865 * needs to be constant. */
11866 gfc_error ("The module or main program array %qs at %L must "
11867 "have constant shape", sym
->name
, &sym
->declared_at
);
11868 specification_expr
= saved_specification_expr
;
11872 /* Constraints on deferred type parameter. */
11873 if (!deferred_requirements (sym
))
11876 if (sym
->ts
.type
== BT_CHARACTER
&& !sym
->attr
.associate_var
)
11878 /* Make sure that character string variables with assumed length are
11879 dummy arguments. */
11880 e
= sym
->ts
.u
.cl
->length
;
11881 if (e
== NULL
&& !sym
->attr
.dummy
&& !sym
->attr
.result
11882 && !sym
->ts
.deferred
&& !sym
->attr
.select_type_temporary
11883 && !sym
->attr
.omp_udr_artificial_var
)
11885 gfc_error ("Entity with assumed character length at %L must be a "
11886 "dummy argument or a PARAMETER", &sym
->declared_at
);
11887 specification_expr
= saved_specification_expr
;
11891 if (e
&& sym
->attr
.save
== SAVE_EXPLICIT
&& !gfc_is_constant_expr (e
))
11893 gfc_error (auto_save_msg
, sym
->name
, &sym
->declared_at
);
11894 specification_expr
= saved_specification_expr
;
11898 if (!gfc_is_constant_expr (e
)
11899 && !(e
->expr_type
== EXPR_VARIABLE
11900 && e
->symtree
->n
.sym
->attr
.flavor
== FL_PARAMETER
))
11902 if (!sym
->attr
.use_assoc
&& sym
->ns
->proc_name
11903 && (sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
11904 || sym
->ns
->proc_name
->attr
.is_main_program
))
11906 gfc_error ("%qs at %L must have constant character length "
11907 "in this context", sym
->name
, &sym
->declared_at
);
11908 specification_expr
= saved_specification_expr
;
11911 if (sym
->attr
.in_common
)
11913 gfc_error ("COMMON variable %qs at %L must have constant "
11914 "character length", sym
->name
, &sym
->declared_at
);
11915 specification_expr
= saved_specification_expr
;
11921 if (sym
->value
== NULL
&& sym
->attr
.referenced
)
11922 apply_default_init_local (sym
); /* Try to apply a default initialization. */
11924 /* Determine if the symbol may not have an initializer. */
11925 no_init_flag
= automatic_flag
= 0;
11926 if (sym
->attr
.allocatable
|| sym
->attr
.external
|| sym
->attr
.dummy
11927 || sym
->attr
.intrinsic
|| sym
->attr
.result
)
11929 else if ((sym
->attr
.dimension
|| sym
->attr
.codimension
) && !sym
->attr
.pointer
11930 && is_non_constant_shape_array (sym
))
11932 no_init_flag
= automatic_flag
= 1;
11934 /* Also, they must not have the SAVE attribute.
11935 SAVE_IMPLICIT is checked below. */
11936 if (sym
->as
&& sym
->attr
.codimension
)
11938 int corank
= sym
->as
->corank
;
11939 sym
->as
->corank
= 0;
11940 no_init_flag
= automatic_flag
= is_non_constant_shape_array (sym
);
11941 sym
->as
->corank
= corank
;
11943 if (automatic_flag
&& sym
->attr
.save
== SAVE_EXPLICIT
)
11945 gfc_error (auto_save_msg
, sym
->name
, &sym
->declared_at
);
11946 specification_expr
= saved_specification_expr
;
11951 /* Ensure that any initializer is simplified. */
11953 gfc_simplify_expr (sym
->value
, 1);
11955 /* Reject illegal initializers. */
11956 if (!sym
->mark
&& sym
->value
)
11958 if (sym
->attr
.allocatable
|| (sym
->ts
.type
== BT_CLASS
11959 && CLASS_DATA (sym
)->attr
.allocatable
))
11960 gfc_error ("Allocatable %qs at %L cannot have an initializer",
11961 sym
->name
, &sym
->declared_at
);
11962 else if (sym
->attr
.external
)
11963 gfc_error ("External %qs at %L cannot have an initializer",
11964 sym
->name
, &sym
->declared_at
);
11965 else if (sym
->attr
.dummy
11966 && !(sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.intent
== INTENT_OUT
))
11967 gfc_error ("Dummy %qs at %L cannot have an initializer",
11968 sym
->name
, &sym
->declared_at
);
11969 else if (sym
->attr
.intrinsic
)
11970 gfc_error ("Intrinsic %qs at %L cannot have an initializer",
11971 sym
->name
, &sym
->declared_at
);
11972 else if (sym
->attr
.result
)
11973 gfc_error ("Function result %qs at %L cannot have an initializer",
11974 sym
->name
, &sym
->declared_at
);
11975 else if (automatic_flag
)
11976 gfc_error ("Automatic array %qs at %L cannot have an initializer",
11977 sym
->name
, &sym
->declared_at
);
11979 goto no_init_error
;
11980 specification_expr
= saved_specification_expr
;
11985 if (sym
->ts
.type
== BT_DERIVED
|| sym
->ts
.type
== BT_CLASS
)
11987 bool res
= resolve_fl_variable_derived (sym
, no_init_flag
);
11988 specification_expr
= saved_specification_expr
;
11992 specification_expr
= saved_specification_expr
;
11997 /* Compare the dummy characteristics of a module procedure interface
11998 declaration with the corresponding declaration in a submodule. */
11999 static gfc_formal_arglist
*new_formal
;
12000 static char errmsg
[200];
12003 compare_fsyms (gfc_symbol
*sym
)
12007 if (sym
== NULL
|| new_formal
== NULL
)
12010 fsym
= new_formal
->sym
;
12015 if (strcmp (sym
->name
, fsym
->name
) == 0)
12017 if (!gfc_check_dummy_characteristics (fsym
, sym
, true, errmsg
, 200))
12018 gfc_error ("%s at %L", errmsg
, &fsym
->declared_at
);
12023 /* Resolve a procedure. */
12026 resolve_fl_procedure (gfc_symbol
*sym
, int mp_flag
)
12028 gfc_formal_arglist
*arg
;
12030 if (sym
->attr
.function
12031 && !resolve_fl_var_and_proc (sym
, mp_flag
))
12034 if (sym
->ts
.type
== BT_CHARACTER
)
12036 gfc_charlen
*cl
= sym
->ts
.u
.cl
;
12038 if (cl
&& cl
->length
&& gfc_is_constant_expr (cl
->length
)
12039 && !resolve_charlen (cl
))
12042 if ((!cl
|| !cl
->length
|| cl
->length
->expr_type
!= EXPR_CONSTANT
)
12043 && sym
->attr
.proc
== PROC_ST_FUNCTION
)
12045 gfc_error ("Character-valued statement function %qs at %L must "
12046 "have constant length", sym
->name
, &sym
->declared_at
);
12051 /* Ensure that derived type for are not of a private type. Internal
12052 module procedures are excluded by 2.2.3.3 - i.e., they are not
12053 externally accessible and can access all the objects accessible in
12055 if (!(sym
->ns
->parent
12056 && sym
->ns
->parent
->proc_name
->attr
.flavor
== FL_MODULE
)
12057 && gfc_check_symbol_access (sym
))
12059 gfc_interface
*iface
;
12061 for (arg
= gfc_sym_get_dummy_args (sym
); arg
; arg
= arg
->next
)
12064 && arg
->sym
->ts
.type
== BT_DERIVED
12065 && !arg
->sym
->ts
.u
.derived
->attr
.use_assoc
12066 && !gfc_check_symbol_access (arg
->sym
->ts
.u
.derived
)
12067 && !gfc_notify_std (GFC_STD_F2003
, "%qs is of a PRIVATE type "
12068 "and cannot be a dummy argument"
12069 " of %qs, which is PUBLIC at %L",
12070 arg
->sym
->name
, sym
->name
,
12071 &sym
->declared_at
))
12073 /* Stop this message from recurring. */
12074 arg
->sym
->ts
.u
.derived
->attr
.access
= ACCESS_PUBLIC
;
12079 /* PUBLIC interfaces may expose PRIVATE procedures that take types
12080 PRIVATE to the containing module. */
12081 for (iface
= sym
->generic
; iface
; iface
= iface
->next
)
12083 for (arg
= gfc_sym_get_dummy_args (iface
->sym
); arg
; arg
= arg
->next
)
12086 && arg
->sym
->ts
.type
== BT_DERIVED
12087 && !arg
->sym
->ts
.u
.derived
->attr
.use_assoc
12088 && !gfc_check_symbol_access (arg
->sym
->ts
.u
.derived
)
12089 && !gfc_notify_std (GFC_STD_F2003
, "Procedure %qs in "
12090 "PUBLIC interface %qs at %L "
12091 "takes dummy arguments of %qs which "
12092 "is PRIVATE", iface
->sym
->name
,
12093 sym
->name
, &iface
->sym
->declared_at
,
12094 gfc_typename(&arg
->sym
->ts
)))
12096 /* Stop this message from recurring. */
12097 arg
->sym
->ts
.u
.derived
->attr
.access
= ACCESS_PUBLIC
;
12104 if (sym
->attr
.function
&& sym
->value
&& sym
->attr
.proc
!= PROC_ST_FUNCTION
12105 && !sym
->attr
.proc_pointer
)
12107 gfc_error ("Function %qs at %L cannot have an initializer",
12108 sym
->name
, &sym
->declared_at
);
12112 /* An external symbol may not have an initializer because it is taken to be
12113 a procedure. Exception: Procedure Pointers. */
12114 if (sym
->attr
.external
&& sym
->value
&& !sym
->attr
.proc_pointer
)
12116 gfc_error ("External object %qs at %L may not have an initializer",
12117 sym
->name
, &sym
->declared_at
);
12121 /* An elemental function is required to return a scalar 12.7.1 */
12122 if (sym
->attr
.elemental
&& sym
->attr
.function
&& sym
->as
)
12124 gfc_error ("ELEMENTAL function %qs at %L must have a scalar "
12125 "result", sym
->name
, &sym
->declared_at
);
12126 /* Reset so that the error only occurs once. */
12127 sym
->attr
.elemental
= 0;
12131 if (sym
->attr
.proc
== PROC_ST_FUNCTION
12132 && (sym
->attr
.allocatable
|| sym
->attr
.pointer
))
12134 gfc_error ("Statement function %qs at %L may not have pointer or "
12135 "allocatable attribute", sym
->name
, &sym
->declared_at
);
12139 /* 5.1.1.5 of the Standard: A function name declared with an asterisk
12140 char-len-param shall not be array-valued, pointer-valued, recursive
12141 or pure. ....snip... A character value of * may only be used in the
12142 following ways: (i) Dummy arg of procedure - dummy associates with
12143 actual length; (ii) To declare a named constant; or (iii) External
12144 function - but length must be declared in calling scoping unit. */
12145 if (sym
->attr
.function
12146 && sym
->ts
.type
== BT_CHARACTER
&& !sym
->ts
.deferred
12147 && sym
->ts
.u
.cl
&& sym
->ts
.u
.cl
->length
== NULL
)
12149 if ((sym
->as
&& sym
->as
->rank
) || (sym
->attr
.pointer
)
12150 || (sym
->attr
.recursive
) || (sym
->attr
.pure
))
12152 if (sym
->as
&& sym
->as
->rank
)
12153 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12154 "array-valued", sym
->name
, &sym
->declared_at
);
12156 if (sym
->attr
.pointer
)
12157 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12158 "pointer-valued", sym
->name
, &sym
->declared_at
);
12160 if (sym
->attr
.pure
)
12161 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12162 "pure", sym
->name
, &sym
->declared_at
);
12164 if (sym
->attr
.recursive
)
12165 gfc_error ("CHARACTER(*) function %qs at %L cannot be "
12166 "recursive", sym
->name
, &sym
->declared_at
);
12171 /* Appendix B.2 of the standard. Contained functions give an
12172 error anyway. Deferred character length is an F2003 feature.
12173 Don't warn on intrinsic conversion functions, which start
12174 with two underscores. */
12175 if (!sym
->attr
.contained
&& !sym
->ts
.deferred
12176 && (sym
->name
[0] != '_' || sym
->name
[1] != '_'))
12177 gfc_notify_std (GFC_STD_F95_OBS
,
12178 "CHARACTER(*) function %qs at %L",
12179 sym
->name
, &sym
->declared_at
);
12182 /* F2008, C1218. */
12183 if (sym
->attr
.elemental
)
12185 if (sym
->attr
.proc_pointer
)
12187 gfc_error ("Procedure pointer %qs at %L shall not be elemental",
12188 sym
->name
, &sym
->declared_at
);
12191 if (sym
->attr
.dummy
)
12193 gfc_error ("Dummy procedure %qs at %L shall not be elemental",
12194 sym
->name
, &sym
->declared_at
);
12199 if (sym
->attr
.is_bind_c
&& sym
->attr
.is_c_interop
!= 1)
12201 gfc_formal_arglist
*curr_arg
;
12202 int has_non_interop_arg
= 0;
12204 if (!verify_bind_c_sym (sym
, &(sym
->ts
), sym
->attr
.in_common
,
12205 sym
->common_block
))
12207 /* Clear these to prevent looking at them again if there was an
12209 sym
->attr
.is_bind_c
= 0;
12210 sym
->attr
.is_c_interop
= 0;
12211 sym
->ts
.is_c_interop
= 0;
12215 /* So far, no errors have been found. */
12216 sym
->attr
.is_c_interop
= 1;
12217 sym
->ts
.is_c_interop
= 1;
12220 curr_arg
= gfc_sym_get_dummy_args (sym
);
12221 while (curr_arg
!= NULL
)
12223 /* Skip implicitly typed dummy args here. */
12224 if (curr_arg
->sym
->attr
.implicit_type
== 0)
12225 if (!gfc_verify_c_interop_param (curr_arg
->sym
))
12226 /* If something is found to fail, record the fact so we
12227 can mark the symbol for the procedure as not being
12228 BIND(C) to try and prevent multiple errors being
12230 has_non_interop_arg
= 1;
12232 curr_arg
= curr_arg
->next
;
12235 /* See if any of the arguments were not interoperable and if so, clear
12236 the procedure symbol to prevent duplicate error messages. */
12237 if (has_non_interop_arg
!= 0)
12239 sym
->attr
.is_c_interop
= 0;
12240 sym
->ts
.is_c_interop
= 0;
12241 sym
->attr
.is_bind_c
= 0;
12245 if (!sym
->attr
.proc_pointer
)
12247 if (sym
->attr
.save
== SAVE_EXPLICIT
)
12249 gfc_error ("PROCEDURE attribute conflicts with SAVE attribute "
12250 "in %qs at %L", sym
->name
, &sym
->declared_at
);
12253 if (sym
->attr
.intent
)
12255 gfc_error ("PROCEDURE attribute conflicts with INTENT attribute "
12256 "in %qs at %L", sym
->name
, &sym
->declared_at
);
12259 if (sym
->attr
.subroutine
&& sym
->attr
.result
)
12261 gfc_error ("PROCEDURE attribute conflicts with RESULT attribute "
12262 "in %qs at %L", sym
->name
, &sym
->declared_at
);
12265 if (sym
->attr
.external
&& sym
->attr
.function
&& !sym
->attr
.module_procedure
12266 && ((sym
->attr
.if_source
== IFSRC_DECL
&& !sym
->attr
.procedure
)
12267 || sym
->attr
.contained
))
12269 gfc_error ("EXTERNAL attribute conflicts with FUNCTION attribute "
12270 "in %qs at %L", sym
->name
, &sym
->declared_at
);
12273 if (strcmp ("ppr@", sym
->name
) == 0)
12275 gfc_error ("Procedure pointer result %qs at %L "
12276 "is missing the pointer attribute",
12277 sym
->ns
->proc_name
->name
, &sym
->declared_at
);
12282 /* Assume that a procedure whose body is not known has references
12283 to external arrays. */
12284 if (sym
->attr
.if_source
!= IFSRC_DECL
)
12285 sym
->attr
.array_outer_dependency
= 1;
12287 /* Compare the characteristics of a module procedure with the
12288 interface declaration. Ideally this would be done with
12289 gfc_compare_interfaces but, at present, the formal interface
12290 cannot be copied to the ts.interface. */
12291 if (sym
->attr
.module_procedure
12292 && sym
->attr
.if_source
== IFSRC_DECL
)
12295 char name
[2*GFC_MAX_SYMBOL_LEN
+ 1];
12297 char *submodule_name
;
12298 strcpy (name
, sym
->ns
->proc_name
->name
);
12299 module_name
= strtok (name
, ".");
12300 submodule_name
= strtok (NULL
, ".");
12302 iface
= sym
->tlink
;
12305 /* Make sure that the result uses the correct charlen for deferred
12307 if (iface
&& sym
->result
12308 && iface
->ts
.type
== BT_CHARACTER
12309 && iface
->ts
.deferred
)
12310 sym
->result
->ts
.u
.cl
= iface
->ts
.u
.cl
;
12315 /* Check the procedure characteristics. */
12316 if (sym
->attr
.elemental
!= iface
->attr
.elemental
)
12318 gfc_error ("Mismatch in ELEMENTAL attribute between MODULE "
12319 "PROCEDURE at %L and its interface in %s",
12320 &sym
->declared_at
, module_name
);
12324 if (sym
->attr
.pure
!= iface
->attr
.pure
)
12326 gfc_error ("Mismatch in PURE attribute between MODULE "
12327 "PROCEDURE at %L and its interface in %s",
12328 &sym
->declared_at
, module_name
);
12332 if (sym
->attr
.recursive
!= iface
->attr
.recursive
)
12334 gfc_error ("Mismatch in RECURSIVE attribute between MODULE "
12335 "PROCEDURE at %L and its interface in %s",
12336 &sym
->declared_at
, module_name
);
12340 /* Check the result characteristics. */
12341 if (!gfc_check_result_characteristics (sym
, iface
, errmsg
, 200))
12343 gfc_error ("%s between the MODULE PROCEDURE declaration "
12344 "in MODULE '%s' and the declaration at %L in "
12345 "(SUB)MODULE '%s'",
12346 errmsg
, module_name
, &sym
->declared_at
,
12347 submodule_name
? submodule_name
: module_name
);
12352 /* Check the characteristics of the formal arguments. */
12353 if (sym
->formal
&& sym
->formal_ns
)
12355 for (arg
= sym
->formal
; arg
&& arg
->sym
; arg
= arg
->next
)
12358 gfc_traverse_ns (sym
->formal_ns
, compare_fsyms
);
12366 /* Resolve a list of finalizer procedures. That is, after they have hopefully
12367 been defined and we now know their defined arguments, check that they fulfill
12368 the requirements of the standard for procedures used as finalizers. */
12371 gfc_resolve_finalizers (gfc_symbol
* derived
, bool *finalizable
)
12373 gfc_finalizer
* list
;
12374 gfc_finalizer
** prev_link
; /* For removing wrong entries from the list. */
12375 bool result
= true;
12376 bool seen_scalar
= false;
12379 gfc_symbol
*parent
= gfc_get_derived_super_type (derived
);
12382 gfc_resolve_finalizers (parent
, finalizable
);
12384 /* Return early when not finalizable. Additionally, ensure that derived-type
12385 components have a their finalizables resolved. */
12386 if (!derived
->f2k_derived
|| !derived
->f2k_derived
->finalizers
)
12388 bool has_final
= false;
12389 for (c
= derived
->components
; c
; c
= c
->next
)
12390 if (c
->ts
.type
== BT_DERIVED
12391 && !c
->attr
.pointer
&& !c
->attr
.proc_pointer
&& !c
->attr
.allocatable
)
12393 bool has_final2
= false;
12394 if (!gfc_resolve_finalizers (c
->ts
.u
.derived
, &has_final
))
12395 return false; /* Error. */
12396 has_final
= has_final
|| has_final2
;
12401 *finalizable
= false;
12406 /* Walk over the list of finalizer-procedures, check them, and if any one
12407 does not fit in with the standard's definition, print an error and remove
12408 it from the list. */
12409 prev_link
= &derived
->f2k_derived
->finalizers
;
12410 for (list
= derived
->f2k_derived
->finalizers
; list
; list
= *prev_link
)
12412 gfc_formal_arglist
*dummy_args
;
12417 /* Skip this finalizer if we already resolved it. */
12418 if (list
->proc_tree
)
12420 if (list
->proc_tree
->n
.sym
->formal
->sym
->as
== NULL
12421 || list
->proc_tree
->n
.sym
->formal
->sym
->as
->rank
== 0)
12422 seen_scalar
= true;
12423 prev_link
= &(list
->next
);
12427 /* Check this exists and is a SUBROUTINE. */
12428 if (!list
->proc_sym
->attr
.subroutine
)
12430 gfc_error ("FINAL procedure %qs at %L is not a SUBROUTINE",
12431 list
->proc_sym
->name
, &list
->where
);
12435 /* We should have exactly one argument. */
12436 dummy_args
= gfc_sym_get_dummy_args (list
->proc_sym
);
12437 if (!dummy_args
|| dummy_args
->next
)
12439 gfc_error ("FINAL procedure at %L must have exactly one argument",
12443 arg
= dummy_args
->sym
;
12445 /* This argument must be of our type. */
12446 if (arg
->ts
.type
!= BT_DERIVED
|| arg
->ts
.u
.derived
!= derived
)
12448 gfc_error ("Argument of FINAL procedure at %L must be of type %qs",
12449 &arg
->declared_at
, derived
->name
);
12453 /* It must neither be a pointer nor allocatable nor optional. */
12454 if (arg
->attr
.pointer
)
12456 gfc_error ("Argument of FINAL procedure at %L must not be a POINTER",
12457 &arg
->declared_at
);
12460 if (arg
->attr
.allocatable
)
12462 gfc_error ("Argument of FINAL procedure at %L must not be"
12463 " ALLOCATABLE", &arg
->declared_at
);
12466 if (arg
->attr
.optional
)
12468 gfc_error ("Argument of FINAL procedure at %L must not be OPTIONAL",
12469 &arg
->declared_at
);
12473 /* It must not be INTENT(OUT). */
12474 if (arg
->attr
.intent
== INTENT_OUT
)
12476 gfc_error ("Argument of FINAL procedure at %L must not be"
12477 " INTENT(OUT)", &arg
->declared_at
);
12481 /* Warn if the procedure is non-scalar and not assumed shape. */
12482 if (warn_surprising
&& arg
->as
&& arg
->as
->rank
!= 0
12483 && arg
->as
->type
!= AS_ASSUMED_SHAPE
)
12484 gfc_warning (OPT_Wsurprising
,
12485 "Non-scalar FINAL procedure at %L should have assumed"
12486 " shape argument", &arg
->declared_at
);
12488 /* Check that it does not match in kind and rank with a FINAL procedure
12489 defined earlier. To really loop over the *earlier* declarations,
12490 we need to walk the tail of the list as new ones were pushed at the
12492 /* TODO: Handle kind parameters once they are implemented. */
12493 my_rank
= (arg
->as
? arg
->as
->rank
: 0);
12494 for (i
= list
->next
; i
; i
= i
->next
)
12496 gfc_formal_arglist
*dummy_args
;
12498 /* Argument list might be empty; that is an error signalled earlier,
12499 but we nevertheless continued resolving. */
12500 dummy_args
= gfc_sym_get_dummy_args (i
->proc_sym
);
12503 gfc_symbol
* i_arg
= dummy_args
->sym
;
12504 const int i_rank
= (i_arg
->as
? i_arg
->as
->rank
: 0);
12505 if (i_rank
== my_rank
)
12507 gfc_error ("FINAL procedure %qs declared at %L has the same"
12508 " rank (%d) as %qs",
12509 list
->proc_sym
->name
, &list
->where
, my_rank
,
12510 i
->proc_sym
->name
);
12516 /* Is this the/a scalar finalizer procedure? */
12518 seen_scalar
= true;
12520 /* Find the symtree for this procedure. */
12521 gcc_assert (!list
->proc_tree
);
12522 list
->proc_tree
= gfc_find_sym_in_symtree (list
->proc_sym
);
12524 prev_link
= &list
->next
;
12527 /* Remove wrong nodes immediately from the list so we don't risk any
12528 troubles in the future when they might fail later expectations. */
12531 *prev_link
= list
->next
;
12532 gfc_free_finalizer (i
);
12536 if (result
== false)
12539 /* Warn if we haven't seen a scalar finalizer procedure (but we know there
12540 were nodes in the list, must have been for arrays. It is surely a good
12541 idea to have a scalar version there if there's something to finalize. */
12542 if (warn_surprising
&& derived
->f2k_derived
->finalizers
&& !seen_scalar
)
12543 gfc_warning (OPT_Wsurprising
,
12544 "Only array FINAL procedures declared for derived type %qs"
12545 " defined at %L, suggest also scalar one",
12546 derived
->name
, &derived
->declared_at
);
12548 vtab
= gfc_find_derived_vtab (derived
);
12549 c
= vtab
->ts
.u
.derived
->components
->next
->next
->next
->next
->next
;
12550 gfc_set_sym_referenced (c
->initializer
->symtree
->n
.sym
);
12553 *finalizable
= true;
12559 /* Check if two GENERIC targets are ambiguous and emit an error is they are. */
12562 check_generic_tbp_ambiguity (gfc_tbp_generic
* t1
, gfc_tbp_generic
* t2
,
12563 const char* generic_name
, locus where
)
12565 gfc_symbol
*sym1
, *sym2
;
12566 const char *pass1
, *pass2
;
12567 gfc_formal_arglist
*dummy_args
;
12569 gcc_assert (t1
->specific
&& t2
->specific
);
12570 gcc_assert (!t1
->specific
->is_generic
);
12571 gcc_assert (!t2
->specific
->is_generic
);
12572 gcc_assert (t1
->is_operator
== t2
->is_operator
);
12574 sym1
= t1
->specific
->u
.specific
->n
.sym
;
12575 sym2
= t2
->specific
->u
.specific
->n
.sym
;
12580 /* Both must be SUBROUTINEs or both must be FUNCTIONs. */
12581 if (sym1
->attr
.subroutine
!= sym2
->attr
.subroutine
12582 || sym1
->attr
.function
!= sym2
->attr
.function
)
12584 gfc_error ("%qs and %qs can't be mixed FUNCTION/SUBROUTINE for"
12585 " GENERIC %qs at %L",
12586 sym1
->name
, sym2
->name
, generic_name
, &where
);
12590 /* Determine PASS arguments. */
12591 if (t1
->specific
->nopass
)
12593 else if (t1
->specific
->pass_arg
)
12594 pass1
= t1
->specific
->pass_arg
;
12597 dummy_args
= gfc_sym_get_dummy_args (t1
->specific
->u
.specific
->n
.sym
);
12599 pass1
= dummy_args
->sym
->name
;
12603 if (t2
->specific
->nopass
)
12605 else if (t2
->specific
->pass_arg
)
12606 pass2
= t2
->specific
->pass_arg
;
12609 dummy_args
= gfc_sym_get_dummy_args (t2
->specific
->u
.specific
->n
.sym
);
12611 pass2
= dummy_args
->sym
->name
;
12616 /* Compare the interfaces. */
12617 if (gfc_compare_interfaces (sym1
, sym2
, sym2
->name
, !t1
->is_operator
, 0,
12618 NULL
, 0, pass1
, pass2
))
12620 gfc_error ("%qs and %qs for GENERIC %qs at %L are ambiguous",
12621 sym1
->name
, sym2
->name
, generic_name
, &where
);
12629 /* Worker function for resolving a generic procedure binding; this is used to
12630 resolve GENERIC as well as user and intrinsic OPERATOR typebound procedures.
12632 The difference between those cases is finding possible inherited bindings
12633 that are overridden, as one has to look for them in tb_sym_root,
12634 tb_uop_root or tb_op, respectively. Thus the caller must already find
12635 the super-type and set p->overridden correctly. */
12638 resolve_tb_generic_targets (gfc_symbol
* super_type
,
12639 gfc_typebound_proc
* p
, const char* name
)
12641 gfc_tbp_generic
* target
;
12642 gfc_symtree
* first_target
;
12643 gfc_symtree
* inherited
;
12645 gcc_assert (p
&& p
->is_generic
);
12647 /* Try to find the specific bindings for the symtrees in our target-list. */
12648 gcc_assert (p
->u
.generic
);
12649 for (target
= p
->u
.generic
; target
; target
= target
->next
)
12650 if (!target
->specific
)
12652 gfc_typebound_proc
* overridden_tbp
;
12653 gfc_tbp_generic
* g
;
12654 const char* target_name
;
12656 target_name
= target
->specific_st
->name
;
12658 /* Defined for this type directly. */
12659 if (target
->specific_st
->n
.tb
&& !target
->specific_st
->n
.tb
->error
)
12661 target
->specific
= target
->specific_st
->n
.tb
;
12662 goto specific_found
;
12665 /* Look for an inherited specific binding. */
12668 inherited
= gfc_find_typebound_proc (super_type
, NULL
, target_name
,
12673 gcc_assert (inherited
->n
.tb
);
12674 target
->specific
= inherited
->n
.tb
;
12675 goto specific_found
;
12679 gfc_error ("Undefined specific binding %qs as target of GENERIC %qs"
12680 " at %L", target_name
, name
, &p
->where
);
12683 /* Once we've found the specific binding, check it is not ambiguous with
12684 other specifics already found or inherited for the same GENERIC. */
12686 gcc_assert (target
->specific
);
12688 /* This must really be a specific binding! */
12689 if (target
->specific
->is_generic
)
12691 gfc_error ("GENERIC %qs at %L must target a specific binding,"
12692 " %qs is GENERIC, too", name
, &p
->where
, target_name
);
12696 /* Check those already resolved on this type directly. */
12697 for (g
= p
->u
.generic
; g
; g
= g
->next
)
12698 if (g
!= target
&& g
->specific
12699 && !check_generic_tbp_ambiguity (target
, g
, name
, p
->where
))
12702 /* Check for ambiguity with inherited specific targets. */
12703 for (overridden_tbp
= p
->overridden
; overridden_tbp
;
12704 overridden_tbp
= overridden_tbp
->overridden
)
12705 if (overridden_tbp
->is_generic
)
12707 for (g
= overridden_tbp
->u
.generic
; g
; g
= g
->next
)
12709 gcc_assert (g
->specific
);
12710 if (!check_generic_tbp_ambiguity (target
, g
, name
, p
->where
))
12716 /* If we attempt to "overwrite" a specific binding, this is an error. */
12717 if (p
->overridden
&& !p
->overridden
->is_generic
)
12719 gfc_error ("GENERIC %qs at %L can't overwrite specific binding with"
12720 " the same name", name
, &p
->where
);
12724 /* Take the SUBROUTINE/FUNCTION attributes of the first specific target, as
12725 all must have the same attributes here. */
12726 first_target
= p
->u
.generic
->specific
->u
.specific
;
12727 gcc_assert (first_target
);
12728 p
->subroutine
= first_target
->n
.sym
->attr
.subroutine
;
12729 p
->function
= first_target
->n
.sym
->attr
.function
;
12735 /* Resolve a GENERIC procedure binding for a derived type. */
12738 resolve_typebound_generic (gfc_symbol
* derived
, gfc_symtree
* st
)
12740 gfc_symbol
* super_type
;
12742 /* Find the overridden binding if any. */
12743 st
->n
.tb
->overridden
= NULL
;
12744 super_type
= gfc_get_derived_super_type (derived
);
12747 gfc_symtree
* overridden
;
12748 overridden
= gfc_find_typebound_proc (super_type
, NULL
, st
->name
,
12751 if (overridden
&& overridden
->n
.tb
)
12752 st
->n
.tb
->overridden
= overridden
->n
.tb
;
12755 /* Resolve using worker function. */
12756 return resolve_tb_generic_targets (super_type
, st
->n
.tb
, st
->name
);
12760 /* Retrieve the target-procedure of an operator binding and do some checks in
12761 common for intrinsic and user-defined type-bound operators. */
12764 get_checked_tb_operator_target (gfc_tbp_generic
* target
, locus where
)
12766 gfc_symbol
* target_proc
;
12768 gcc_assert (target
->specific
&& !target
->specific
->is_generic
);
12769 target_proc
= target
->specific
->u
.specific
->n
.sym
;
12770 gcc_assert (target_proc
);
12772 /* F08:C468. All operator bindings must have a passed-object dummy argument. */
12773 if (target
->specific
->nopass
)
12775 gfc_error ("Type-bound operator at %L can't be NOPASS", &where
);
12779 return target_proc
;
12783 /* Resolve a type-bound intrinsic operator. */
12786 resolve_typebound_intrinsic_op (gfc_symbol
* derived
, gfc_intrinsic_op op
,
12787 gfc_typebound_proc
* p
)
12789 gfc_symbol
* super_type
;
12790 gfc_tbp_generic
* target
;
12792 /* If there's already an error here, do nothing (but don't fail again). */
12796 /* Operators should always be GENERIC bindings. */
12797 gcc_assert (p
->is_generic
);
12799 /* Look for an overridden binding. */
12800 super_type
= gfc_get_derived_super_type (derived
);
12801 if (super_type
&& super_type
->f2k_derived
)
12802 p
->overridden
= gfc_find_typebound_intrinsic_op (super_type
, NULL
,
12805 p
->overridden
= NULL
;
12807 /* Resolve general GENERIC properties using worker function. */
12808 if (!resolve_tb_generic_targets (super_type
, p
, gfc_op2string(op
)))
12811 /* Check the targets to be procedures of correct interface. */
12812 for (target
= p
->u
.generic
; target
; target
= target
->next
)
12814 gfc_symbol
* target_proc
;
12816 target_proc
= get_checked_tb_operator_target (target
, p
->where
);
12820 if (!gfc_check_operator_interface (target_proc
, op
, p
->where
))
12823 /* Add target to non-typebound operator list. */
12824 if (!target
->specific
->deferred
&& !derived
->attr
.use_assoc
12825 && p
->access
!= ACCESS_PRIVATE
&& derived
->ns
== gfc_current_ns
)
12827 gfc_interface
*head
, *intr
;
12829 /* Preempt 'gfc_check_new_interface' for submodules, where the
12830 mechanism for handling module procedures winds up resolving
12831 operator interfaces twice and would otherwise cause an error. */
12832 for (intr
= derived
->ns
->op
[op
]; intr
; intr
= intr
->next
)
12833 if (intr
->sym
== target_proc
12834 && target_proc
->attr
.used_in_submodule
)
12837 if (!gfc_check_new_interface (derived
->ns
->op
[op
],
12838 target_proc
, p
->where
))
12840 head
= derived
->ns
->op
[op
];
12841 intr
= gfc_get_interface ();
12842 intr
->sym
= target_proc
;
12843 intr
->where
= p
->where
;
12845 derived
->ns
->op
[op
] = intr
;
12857 /* Resolve a type-bound user operator (tree-walker callback). */
12859 static gfc_symbol
* resolve_bindings_derived
;
12860 static bool resolve_bindings_result
;
12862 static bool check_uop_procedure (gfc_symbol
* sym
, locus where
);
12865 resolve_typebound_user_op (gfc_symtree
* stree
)
12867 gfc_symbol
* super_type
;
12868 gfc_tbp_generic
* target
;
12870 gcc_assert (stree
&& stree
->n
.tb
);
12872 if (stree
->n
.tb
->error
)
12875 /* Operators should always be GENERIC bindings. */
12876 gcc_assert (stree
->n
.tb
->is_generic
);
12878 /* Find overridden procedure, if any. */
12879 super_type
= gfc_get_derived_super_type (resolve_bindings_derived
);
12880 if (super_type
&& super_type
->f2k_derived
)
12882 gfc_symtree
* overridden
;
12883 overridden
= gfc_find_typebound_user_op (super_type
, NULL
,
12884 stree
->name
, true, NULL
);
12886 if (overridden
&& overridden
->n
.tb
)
12887 stree
->n
.tb
->overridden
= overridden
->n
.tb
;
12890 stree
->n
.tb
->overridden
= NULL
;
12892 /* Resolve basically using worker function. */
12893 if (!resolve_tb_generic_targets (super_type
, stree
->n
.tb
, stree
->name
))
12896 /* Check the targets to be functions of correct interface. */
12897 for (target
= stree
->n
.tb
->u
.generic
; target
; target
= target
->next
)
12899 gfc_symbol
* target_proc
;
12901 target_proc
= get_checked_tb_operator_target (target
, stree
->n
.tb
->where
);
12905 if (!check_uop_procedure (target_proc
, stree
->n
.tb
->where
))
12912 resolve_bindings_result
= false;
12913 stree
->n
.tb
->error
= 1;
12917 /* Resolve the type-bound procedures for a derived type. */
12920 resolve_typebound_procedure (gfc_symtree
* stree
)
12924 gfc_symbol
* me_arg
;
12925 gfc_symbol
* super_type
;
12926 gfc_component
* comp
;
12928 gcc_assert (stree
);
12930 /* Undefined specific symbol from GENERIC target definition. */
12934 if (stree
->n
.tb
->error
)
12937 /* If this is a GENERIC binding, use that routine. */
12938 if (stree
->n
.tb
->is_generic
)
12940 if (!resolve_typebound_generic (resolve_bindings_derived
, stree
))
12945 /* Get the target-procedure to check it. */
12946 gcc_assert (!stree
->n
.tb
->is_generic
);
12947 gcc_assert (stree
->n
.tb
->u
.specific
);
12948 proc
= stree
->n
.tb
->u
.specific
->n
.sym
;
12949 where
= stree
->n
.tb
->where
;
12951 /* Default access should already be resolved from the parser. */
12952 gcc_assert (stree
->n
.tb
->access
!= ACCESS_UNKNOWN
);
12954 if (stree
->n
.tb
->deferred
)
12956 if (!check_proc_interface (proc
, &where
))
12961 /* Check for F08:C465. */
12962 if ((!proc
->attr
.subroutine
&& !proc
->attr
.function
)
12963 || (proc
->attr
.proc
!= PROC_MODULE
12964 && proc
->attr
.if_source
!= IFSRC_IFBODY
)
12965 || proc
->attr
.abstract
)
12967 gfc_error ("%qs must be a module procedure or an external procedure with"
12968 " an explicit interface at %L", proc
->name
, &where
);
12973 stree
->n
.tb
->subroutine
= proc
->attr
.subroutine
;
12974 stree
->n
.tb
->function
= proc
->attr
.function
;
12976 /* Find the super-type of the current derived type. We could do this once and
12977 store in a global if speed is needed, but as long as not I believe this is
12978 more readable and clearer. */
12979 super_type
= gfc_get_derived_super_type (resolve_bindings_derived
);
12981 /* If PASS, resolve and check arguments if not already resolved / loaded
12982 from a .mod file. */
12983 if (!stree
->n
.tb
->nopass
&& stree
->n
.tb
->pass_arg_num
== 0)
12985 gfc_formal_arglist
*dummy_args
;
12987 dummy_args
= gfc_sym_get_dummy_args (proc
);
12988 if (stree
->n
.tb
->pass_arg
)
12990 gfc_formal_arglist
*i
;
12992 /* If an explicit passing argument name is given, walk the arg-list
12993 and look for it. */
12996 stree
->n
.tb
->pass_arg_num
= 1;
12997 for (i
= dummy_args
; i
; i
= i
->next
)
12999 if (!strcmp (i
->sym
->name
, stree
->n
.tb
->pass_arg
))
13004 ++stree
->n
.tb
->pass_arg_num
;
13009 gfc_error ("Procedure %qs with PASS(%s) at %L has no"
13011 proc
->name
, stree
->n
.tb
->pass_arg
, &where
,
13012 stree
->n
.tb
->pass_arg
);
13018 /* Otherwise, take the first one; there should in fact be at least
13020 stree
->n
.tb
->pass_arg_num
= 1;
13023 gfc_error ("Procedure %qs with PASS at %L must have at"
13024 " least one argument", proc
->name
, &where
);
13027 me_arg
= dummy_args
->sym
;
13030 /* Now check that the argument-type matches and the passed-object
13031 dummy argument is generally fine. */
13033 gcc_assert (me_arg
);
13035 if (me_arg
->ts
.type
!= BT_CLASS
)
13037 gfc_error ("Non-polymorphic passed-object dummy argument of %qs"
13038 " at %L", proc
->name
, &where
);
13042 if (CLASS_DATA (me_arg
)->ts
.u
.derived
13043 != resolve_bindings_derived
)
13045 gfc_error ("Argument %qs of %qs with PASS(%s) at %L must be of"
13046 " the derived-type %qs", me_arg
->name
, proc
->name
,
13047 me_arg
->name
, &where
, resolve_bindings_derived
->name
);
13051 gcc_assert (me_arg
->ts
.type
== BT_CLASS
);
13052 if (CLASS_DATA (me_arg
)->as
&& CLASS_DATA (me_arg
)->as
->rank
!= 0)
13054 gfc_error ("Passed-object dummy argument of %qs at %L must be"
13055 " scalar", proc
->name
, &where
);
13058 if (CLASS_DATA (me_arg
)->attr
.allocatable
)
13060 gfc_error ("Passed-object dummy argument of %qs at %L must not"
13061 " be ALLOCATABLE", proc
->name
, &where
);
13064 if (CLASS_DATA (me_arg
)->attr
.class_pointer
)
13066 gfc_error ("Passed-object dummy argument of %qs at %L must not"
13067 " be POINTER", proc
->name
, &where
);
13072 /* If we are extending some type, check that we don't override a procedure
13073 flagged NON_OVERRIDABLE. */
13074 stree
->n
.tb
->overridden
= NULL
;
13077 gfc_symtree
* overridden
;
13078 overridden
= gfc_find_typebound_proc (super_type
, NULL
,
13079 stree
->name
, true, NULL
);
13083 if (overridden
->n
.tb
)
13084 stree
->n
.tb
->overridden
= overridden
->n
.tb
;
13086 if (!gfc_check_typebound_override (stree
, overridden
))
13091 /* See if there's a name collision with a component directly in this type. */
13092 for (comp
= resolve_bindings_derived
->components
; comp
; comp
= comp
->next
)
13093 if (!strcmp (comp
->name
, stree
->name
))
13095 gfc_error ("Procedure %qs at %L has the same name as a component of"
13097 stree
->name
, &where
, resolve_bindings_derived
->name
);
13101 /* Try to find a name collision with an inherited component. */
13102 if (super_type
&& gfc_find_component (super_type
, stree
->name
, true, true,
13105 gfc_error ("Procedure %qs at %L has the same name as an inherited"
13106 " component of %qs",
13107 stree
->name
, &where
, resolve_bindings_derived
->name
);
13111 stree
->n
.tb
->error
= 0;
13115 resolve_bindings_result
= false;
13116 stree
->n
.tb
->error
= 1;
13121 resolve_typebound_procedures (gfc_symbol
* derived
)
13124 gfc_symbol
* super_type
;
13126 if (!derived
->f2k_derived
|| !derived
->f2k_derived
->tb_sym_root
)
13129 super_type
= gfc_get_derived_super_type (derived
);
13131 resolve_symbol (super_type
);
13133 resolve_bindings_derived
= derived
;
13134 resolve_bindings_result
= true;
13136 if (derived
->f2k_derived
->tb_sym_root
)
13137 gfc_traverse_symtree (derived
->f2k_derived
->tb_sym_root
,
13138 &resolve_typebound_procedure
);
13140 if (derived
->f2k_derived
->tb_uop_root
)
13141 gfc_traverse_symtree (derived
->f2k_derived
->tb_uop_root
,
13142 &resolve_typebound_user_op
);
13144 for (op
= 0; op
!= GFC_INTRINSIC_OPS
; ++op
)
13146 gfc_typebound_proc
* p
= derived
->f2k_derived
->tb_op
[op
];
13147 if (p
&& !resolve_typebound_intrinsic_op (derived
,
13148 (gfc_intrinsic_op
)op
, p
))
13149 resolve_bindings_result
= false;
13152 return resolve_bindings_result
;
13156 /* Add a derived type to the dt_list. The dt_list is used in trans-types.c
13157 to give all identical derived types the same backend_decl. */
13159 add_dt_to_dt_list (gfc_symbol
*derived
)
13161 gfc_dt_list
*dt_list
;
13163 for (dt_list
= gfc_derived_types
; dt_list
; dt_list
= dt_list
->next
)
13164 if (derived
== dt_list
->derived
)
13167 dt_list
= gfc_get_dt_list ();
13168 dt_list
->next
= gfc_derived_types
;
13169 dt_list
->derived
= derived
;
13170 gfc_derived_types
= dt_list
;
13174 /* Ensure that a derived-type is really not abstract, meaning that every
13175 inherited DEFERRED binding is overridden by a non-DEFERRED one. */
13178 ensure_not_abstract_walker (gfc_symbol
* sub
, gfc_symtree
* st
)
13183 if (!ensure_not_abstract_walker (sub
, st
->left
))
13185 if (!ensure_not_abstract_walker (sub
, st
->right
))
13188 if (st
->n
.tb
&& st
->n
.tb
->deferred
)
13190 gfc_symtree
* overriding
;
13191 overriding
= gfc_find_typebound_proc (sub
, NULL
, st
->name
, true, NULL
);
13194 gcc_assert (overriding
->n
.tb
);
13195 if (overriding
->n
.tb
->deferred
)
13197 gfc_error ("Derived-type %qs declared at %L must be ABSTRACT because"
13198 " %qs is DEFERRED and not overridden",
13199 sub
->name
, &sub
->declared_at
, st
->name
);
13208 ensure_not_abstract (gfc_symbol
* sub
, gfc_symbol
* ancestor
)
13210 /* The algorithm used here is to recursively travel up the ancestry of sub
13211 and for each ancestor-type, check all bindings. If any of them is
13212 DEFERRED, look it up starting from sub and see if the found (overriding)
13213 binding is not DEFERRED.
13214 This is not the most efficient way to do this, but it should be ok and is
13215 clearer than something sophisticated. */
13217 gcc_assert (ancestor
&& !sub
->attr
.abstract
);
13219 if (!ancestor
->attr
.abstract
)
13222 /* Walk bindings of this ancestor. */
13223 if (ancestor
->f2k_derived
)
13226 t
= ensure_not_abstract_walker (sub
, ancestor
->f2k_derived
->tb_sym_root
);
13231 /* Find next ancestor type and recurse on it. */
13232 ancestor
= gfc_get_derived_super_type (ancestor
);
13234 return ensure_not_abstract (sub
, ancestor
);
13240 /* This check for typebound defined assignments is done recursively
13241 since the order in which derived types are resolved is not always in
13242 order of the declarations. */
13245 check_defined_assignments (gfc_symbol
*derived
)
13249 for (c
= derived
->components
; c
; c
= c
->next
)
13251 if (!gfc_bt_struct (c
->ts
.type
)
13253 || c
->attr
.allocatable
13254 || c
->attr
.proc_pointer_comp
13255 || c
->attr
.class_pointer
13256 || c
->attr
.proc_pointer
)
13259 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
13260 || (c
->ts
.u
.derived
->f2k_derived
13261 && c
->ts
.u
.derived
->f2k_derived
->tb_op
[INTRINSIC_ASSIGN
]))
13263 derived
->attr
.defined_assign_comp
= 1;
13267 check_defined_assignments (c
->ts
.u
.derived
);
13268 if (c
->ts
.u
.derived
->attr
.defined_assign_comp
)
13270 derived
->attr
.defined_assign_comp
= 1;
13277 /* Resolve a single component of a derived type or structure. */
13280 resolve_component (gfc_component
*c
, gfc_symbol
*sym
)
13282 gfc_symbol
*super_type
;
13284 if (c
->attr
.artificial
)
13288 if ((!sym
->attr
.is_class
|| c
!= sym
->components
)
13289 && c
->attr
.codimension
13290 && (!c
->attr
.allocatable
|| (c
->as
&& c
->as
->type
!= AS_DEFERRED
)))
13292 gfc_error ("Coarray component %qs at %L must be allocatable with "
13293 "deferred shape", c
->name
, &c
->loc
);
13298 if (c
->attr
.codimension
&& c
->ts
.type
== BT_DERIVED
13299 && c
->ts
.u
.derived
->ts
.is_iso_c
)
13301 gfc_error ("Component %qs at %L of TYPE(C_PTR) or TYPE(C_FUNPTR) "
13302 "shall not be a coarray", c
->name
, &c
->loc
);
13307 if (gfc_bt_struct (c
->ts
.type
) && c
->ts
.u
.derived
->attr
.coarray_comp
13308 && (c
->attr
.codimension
|| c
->attr
.pointer
|| c
->attr
.dimension
13309 || c
->attr
.allocatable
))
13311 gfc_error ("Component %qs at %L with coarray component "
13312 "shall be a nonpointer, nonallocatable scalar",
13318 if (c
->attr
.contiguous
&& (!c
->attr
.dimension
|| !c
->attr
.pointer
))
13320 gfc_error ("Component %qs at %L has the CONTIGUOUS attribute but "
13321 "is not an array pointer", c
->name
, &c
->loc
);
13325 if (c
->attr
.proc_pointer
&& c
->ts
.interface
)
13327 gfc_symbol
*ifc
= c
->ts
.interface
;
13329 if (!sym
->attr
.vtype
&& !check_proc_interface (ifc
, &c
->loc
))
13335 if (ifc
->attr
.if_source
|| ifc
->attr
.intrinsic
)
13337 /* Resolve interface and copy attributes. */
13338 if (ifc
->formal
&& !ifc
->formal_ns
)
13339 resolve_symbol (ifc
);
13340 if (ifc
->attr
.intrinsic
)
13341 gfc_resolve_intrinsic (ifc
, &ifc
->declared_at
);
13345 c
->ts
= ifc
->result
->ts
;
13346 c
->attr
.allocatable
= ifc
->result
->attr
.allocatable
;
13347 c
->attr
.pointer
= ifc
->result
->attr
.pointer
;
13348 c
->attr
.dimension
= ifc
->result
->attr
.dimension
;
13349 c
->as
= gfc_copy_array_spec (ifc
->result
->as
);
13350 c
->attr
.class_ok
= ifc
->result
->attr
.class_ok
;
13355 c
->attr
.allocatable
= ifc
->attr
.allocatable
;
13356 c
->attr
.pointer
= ifc
->attr
.pointer
;
13357 c
->attr
.dimension
= ifc
->attr
.dimension
;
13358 c
->as
= gfc_copy_array_spec (ifc
->as
);
13359 c
->attr
.class_ok
= ifc
->attr
.class_ok
;
13361 c
->ts
.interface
= ifc
;
13362 c
->attr
.function
= ifc
->attr
.function
;
13363 c
->attr
.subroutine
= ifc
->attr
.subroutine
;
13365 c
->attr
.pure
= ifc
->attr
.pure
;
13366 c
->attr
.elemental
= ifc
->attr
.elemental
;
13367 c
->attr
.recursive
= ifc
->attr
.recursive
;
13368 c
->attr
.always_explicit
= ifc
->attr
.always_explicit
;
13369 c
->attr
.ext_attr
|= ifc
->attr
.ext_attr
;
13370 /* Copy char length. */
13371 if (ifc
->ts
.type
== BT_CHARACTER
&& ifc
->ts
.u
.cl
)
13373 gfc_charlen
*cl
= gfc_new_charlen (sym
->ns
, ifc
->ts
.u
.cl
);
13374 if (cl
->length
&& !cl
->resolved
13375 && !gfc_resolve_expr (cl
->length
))
13384 else if (c
->attr
.proc_pointer
&& c
->ts
.type
== BT_UNKNOWN
)
13386 /* Since PPCs are not implicitly typed, a PPC without an explicit
13387 interface must be a subroutine. */
13388 gfc_add_subroutine (&c
->attr
, c
->name
, &c
->loc
);
13391 /* Procedure pointer components: Check PASS arg. */
13392 if (c
->attr
.proc_pointer
&& !c
->tb
->nopass
&& c
->tb
->pass_arg_num
== 0
13393 && !sym
->attr
.vtype
)
13395 gfc_symbol
* me_arg
;
13397 if (c
->tb
->pass_arg
)
13399 gfc_formal_arglist
* i
;
13401 /* If an explicit passing argument name is given, walk the arg-list
13402 and look for it. */
13405 c
->tb
->pass_arg_num
= 1;
13406 for (i
= c
->ts
.interface
->formal
; i
; i
= i
->next
)
13408 if (!strcmp (i
->sym
->name
, c
->tb
->pass_arg
))
13413 c
->tb
->pass_arg_num
++;
13418 gfc_error ("Procedure pointer component %qs with PASS(%s) "
13419 "at %L has no argument %qs", c
->name
,
13420 c
->tb
->pass_arg
, &c
->loc
, c
->tb
->pass_arg
);
13427 /* Otherwise, take the first one; there should in fact be at least
13429 c
->tb
->pass_arg_num
= 1;
13430 if (!c
->ts
.interface
->formal
)
13432 gfc_error ("Procedure pointer component %qs with PASS at %L "
13433 "must have at least one argument",
13438 me_arg
= c
->ts
.interface
->formal
->sym
;
13441 /* Now check that the argument-type matches. */
13442 gcc_assert (me_arg
);
13443 if ((me_arg
->ts
.type
!= BT_DERIVED
&& me_arg
->ts
.type
!= BT_CLASS
)
13444 || (me_arg
->ts
.type
== BT_DERIVED
&& me_arg
->ts
.u
.derived
!= sym
)
13445 || (me_arg
->ts
.type
== BT_CLASS
13446 && CLASS_DATA (me_arg
)->ts
.u
.derived
!= sym
))
13448 gfc_error ("Argument %qs of %qs with PASS(%s) at %L must be of"
13449 " the derived type %qs", me_arg
->name
, c
->name
,
13450 me_arg
->name
, &c
->loc
, sym
->name
);
13455 /* Check for C453. */
13456 if (me_arg
->attr
.dimension
)
13458 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
13459 "must be scalar", me_arg
->name
, c
->name
, me_arg
->name
,
13465 if (me_arg
->attr
.pointer
)
13467 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
13468 "may not have the POINTER attribute", me_arg
->name
,
13469 c
->name
, me_arg
->name
, &c
->loc
);
13474 if (me_arg
->attr
.allocatable
)
13476 gfc_error ("Argument %qs of %qs with PASS(%s) at %L "
13477 "may not be ALLOCATABLE", me_arg
->name
, c
->name
,
13478 me_arg
->name
, &c
->loc
);
13483 if (gfc_type_is_extensible (sym
) && me_arg
->ts
.type
!= BT_CLASS
)
13485 gfc_error ("Non-polymorphic passed-object dummy argument of %qs"
13486 " at %L", c
->name
, &c
->loc
);
13492 /* Check type-spec if this is not the parent-type component. */
13493 if (((sym
->attr
.is_class
13494 && (!sym
->components
->ts
.u
.derived
->attr
.extension
13495 || c
!= sym
->components
->ts
.u
.derived
->components
))
13496 || (!sym
->attr
.is_class
13497 && (!sym
->attr
.extension
|| c
!= sym
->components
)))
13498 && !sym
->attr
.vtype
13499 && !resolve_typespec_used (&c
->ts
, &c
->loc
, c
->name
))
13502 super_type
= gfc_get_derived_super_type (sym
);
13504 /* If this type is an extension, set the accessibility of the parent
13507 && ((sym
->attr
.is_class
13508 && c
== sym
->components
->ts
.u
.derived
->components
)
13509 || (!sym
->attr
.is_class
&& c
== sym
->components
))
13510 && strcmp (super_type
->name
, c
->name
) == 0)
13511 c
->attr
.access
= super_type
->attr
.access
;
13513 /* If this type is an extension, see if this component has the same name
13514 as an inherited type-bound procedure. */
13515 if (super_type
&& !sym
->attr
.is_class
13516 && gfc_find_typebound_proc (super_type
, NULL
, c
->name
, true, NULL
))
13518 gfc_error ("Component %qs of %qs at %L has the same name as an"
13519 " inherited type-bound procedure",
13520 c
->name
, sym
->name
, &c
->loc
);
13524 if (c
->ts
.type
== BT_CHARACTER
&& !c
->attr
.proc_pointer
13525 && !c
->ts
.deferred
)
13527 if (c
->ts
.u
.cl
->length
== NULL
13528 || (!resolve_charlen(c
->ts
.u
.cl
))
13529 || !gfc_is_constant_expr (c
->ts
.u
.cl
->length
))
13531 gfc_error ("Character length of component %qs needs to "
13532 "be a constant specification expression at %L",
13534 c
->ts
.u
.cl
->length
? &c
->ts
.u
.cl
->length
->where
: &c
->loc
);
13539 if (c
->ts
.type
== BT_CHARACTER
&& c
->ts
.deferred
13540 && !c
->attr
.pointer
&& !c
->attr
.allocatable
)
13542 gfc_error ("Character component %qs of %qs at %L with deferred "
13543 "length must be a POINTER or ALLOCATABLE",
13544 c
->name
, sym
->name
, &c
->loc
);
13548 /* Add the hidden deferred length field. */
13549 if (c
->ts
.type
== BT_CHARACTER
&& c
->ts
.deferred
&& !c
->attr
.function
13550 && !sym
->attr
.is_class
)
13552 char name
[GFC_MAX_SYMBOL_LEN
+9];
13553 gfc_component
*strlen
;
13554 sprintf (name
, "_%s_length", c
->name
);
13555 strlen
= gfc_find_component (sym
, name
, true, true, NULL
);
13556 if (strlen
== NULL
)
13558 if (!gfc_add_component (sym
, name
, &strlen
))
13560 strlen
->ts
.type
= BT_INTEGER
;
13561 strlen
->ts
.kind
= gfc_charlen_int_kind
;
13562 strlen
->attr
.access
= ACCESS_PRIVATE
;
13563 strlen
->attr
.artificial
= 1;
13567 if (c
->ts
.type
== BT_DERIVED
13568 && sym
->component_access
!= ACCESS_PRIVATE
13569 && gfc_check_symbol_access (sym
)
13570 && !is_sym_host_assoc (c
->ts
.u
.derived
, sym
->ns
)
13571 && !c
->ts
.u
.derived
->attr
.use_assoc
13572 && !gfc_check_symbol_access (c
->ts
.u
.derived
)
13573 && !gfc_notify_std (GFC_STD_F2003
, "the component %qs is a "
13574 "PRIVATE type and cannot be a component of "
13575 "%qs, which is PUBLIC at %L", c
->name
,
13576 sym
->name
, &sym
->declared_at
))
13579 if ((sym
->attr
.sequence
|| sym
->attr
.is_bind_c
) && c
->ts
.type
== BT_CLASS
)
13581 gfc_error ("Polymorphic component %s at %L in SEQUENCE or BIND(C) "
13582 "type %s", c
->name
, &c
->loc
, sym
->name
);
13586 if (sym
->attr
.sequence
)
13588 if (c
->ts
.type
== BT_DERIVED
&& c
->ts
.u
.derived
->attr
.sequence
== 0)
13590 gfc_error ("Component %s of SEQUENCE type declared at %L does "
13591 "not have the SEQUENCE attribute",
13592 c
->ts
.u
.derived
->name
, &sym
->declared_at
);
13597 if (c
->ts
.type
== BT_DERIVED
&& c
->ts
.u
.derived
->attr
.generic
)
13598 c
->ts
.u
.derived
= gfc_find_dt_in_generic (c
->ts
.u
.derived
);
13599 else if (c
->ts
.type
== BT_CLASS
&& c
->attr
.class_ok
13600 && CLASS_DATA (c
)->ts
.u
.derived
->attr
.generic
)
13601 CLASS_DATA (c
)->ts
.u
.derived
13602 = gfc_find_dt_in_generic (CLASS_DATA (c
)->ts
.u
.derived
);
13604 if (!sym
->attr
.is_class
&& c
->ts
.type
== BT_DERIVED
&& !sym
->attr
.vtype
13605 && c
->attr
.pointer
&& c
->ts
.u
.derived
->components
== NULL
13606 && !c
->ts
.u
.derived
->attr
.zero_comp
)
13608 gfc_error ("The pointer component %qs of %qs at %L is a type "
13609 "that has not been declared", c
->name
, sym
->name
,
13614 if (c
->ts
.type
== BT_CLASS
&& c
->attr
.class_ok
13615 && CLASS_DATA (c
)->attr
.class_pointer
13616 && CLASS_DATA (c
)->ts
.u
.derived
->components
== NULL
13617 && !CLASS_DATA (c
)->ts
.u
.derived
->attr
.zero_comp
13618 && !UNLIMITED_POLY (c
))
13620 gfc_error ("The pointer component %qs of %qs at %L is a type "
13621 "that has not been declared", c
->name
, sym
->name
,
13626 /* If an allocatable component derived type is of the same type as
13627 the enclosing derived type, we need a vtable generating so that
13628 the __deallocate procedure is created. */
13629 if ((c
->ts
.type
== BT_DERIVED
|| c
->ts
.type
== BT_CLASS
)
13630 && c
->ts
.u
.derived
== sym
&& c
->attr
.allocatable
== 1)
13631 gfc_find_vtab (&c
->ts
);
13633 /* Ensure that all the derived type components are put on the
13634 derived type list; even in formal namespaces, where derived type
13635 pointer components might not have been declared. */
13636 if (c
->ts
.type
== BT_DERIVED
13638 && c
->ts
.u
.derived
->components
13640 && sym
!= c
->ts
.u
.derived
)
13641 add_dt_to_dt_list (c
->ts
.u
.derived
);
13643 if (!gfc_resolve_array_spec (c
->as
,
13644 !(c
->attr
.pointer
|| c
->attr
.proc_pointer
13645 || c
->attr
.allocatable
)))
13648 if (c
->initializer
&& !sym
->attr
.vtype
13649 && !gfc_check_assign_symbol (sym
, c
, c
->initializer
))
13656 /* Be nice about the locus for a structure expression - show the locus of the
13657 first non-null sub-expression if we can. */
13660 cons_where (gfc_expr
*struct_expr
)
13662 gfc_constructor
*cons
;
13664 gcc_assert (struct_expr
&& struct_expr
->expr_type
== EXPR_STRUCTURE
);
13666 cons
= gfc_constructor_first (struct_expr
->value
.constructor
);
13667 for (; cons
; cons
= gfc_constructor_next (cons
))
13669 if (cons
->expr
&& cons
->expr
->expr_type
!= EXPR_NULL
)
13670 return &cons
->expr
->where
;
13673 return &struct_expr
->where
;
13676 /* Resolve the components of a structure type. Much less work than derived
13680 resolve_fl_struct (gfc_symbol
*sym
)
13683 gfc_expr
*init
= NULL
;
13686 /* Make sure UNIONs do not have overlapping initializers. */
13687 if (sym
->attr
.flavor
== FL_UNION
)
13689 for (c
= sym
->components
; c
; c
= c
->next
)
13691 if (init
&& c
->initializer
)
13693 gfc_error ("Conflicting initializers in union at %L and %L",
13694 cons_where (init
), cons_where (c
->initializer
));
13695 gfc_free_expr (c
->initializer
);
13696 c
->initializer
= NULL
;
13699 init
= c
->initializer
;
13704 for (c
= sym
->components
; c
; c
= c
->next
)
13705 if (!resolve_component (c
, sym
))
13711 if (sym
->components
)
13712 add_dt_to_dt_list (sym
);
13718 /* Resolve the components of a derived type. This does not have to wait until
13719 resolution stage, but can be done as soon as the dt declaration has been
13723 resolve_fl_derived0 (gfc_symbol
*sym
)
13725 gfc_symbol
* super_type
;
13729 if (sym
->attr
.unlimited_polymorphic
)
13732 super_type
= gfc_get_derived_super_type (sym
);
13735 if (super_type
&& sym
->attr
.coarray_comp
&& !super_type
->attr
.coarray_comp
)
13737 gfc_error ("As extending type %qs at %L has a coarray component, "
13738 "parent type %qs shall also have one", sym
->name
,
13739 &sym
->declared_at
, super_type
->name
);
13743 /* Ensure the extended type gets resolved before we do. */
13744 if (super_type
&& !resolve_fl_derived0 (super_type
))
13747 /* An ABSTRACT type must be extensible. */
13748 if (sym
->attr
.abstract
&& !gfc_type_is_extensible (sym
))
13750 gfc_error ("Non-extensible derived-type %qs at %L must not be ABSTRACT",
13751 sym
->name
, &sym
->declared_at
);
13755 c
= (sym
->attr
.is_class
) ? sym
->components
->ts
.u
.derived
->components
13759 for ( ; c
!= NULL
; c
= c
->next
)
13760 if (!resolve_component (c
, sym
))
13766 check_defined_assignments (sym
);
13768 if (!sym
->attr
.defined_assign_comp
&& super_type
)
13769 sym
->attr
.defined_assign_comp
13770 = super_type
->attr
.defined_assign_comp
;
13772 /* If this is a non-ABSTRACT type extending an ABSTRACT one, ensure that
13773 all DEFERRED bindings are overridden. */
13774 if (super_type
&& super_type
->attr
.abstract
&& !sym
->attr
.abstract
13775 && !sym
->attr
.is_class
13776 && !ensure_not_abstract (sym
, super_type
))
13779 /* Add derived type to the derived type list. */
13780 add_dt_to_dt_list (sym
);
13786 /* The following procedure does the full resolution of a derived type,
13787 including resolution of all type-bound procedures (if present). In contrast
13788 to 'resolve_fl_derived0' this can only be done after the module has been
13789 parsed completely. */
13792 resolve_fl_derived (gfc_symbol
*sym
)
13794 gfc_symbol
*gen_dt
= NULL
;
13796 if (sym
->attr
.unlimited_polymorphic
)
13799 if (!sym
->attr
.is_class
)
13800 gfc_find_symbol (sym
->name
, sym
->ns
, 0, &gen_dt
);
13801 if (gen_dt
&& gen_dt
->generic
&& gen_dt
->generic
->next
13802 && (!gen_dt
->generic
->sym
->attr
.use_assoc
13803 || gen_dt
->generic
->sym
->module
!= gen_dt
->generic
->next
->sym
->module
)
13804 && !gfc_notify_std (GFC_STD_F2003
, "Generic name %qs of function "
13805 "%qs at %L being the same name as derived "
13806 "type at %L", sym
->name
,
13807 gen_dt
->generic
->sym
== sym
13808 ? gen_dt
->generic
->next
->sym
->name
13809 : gen_dt
->generic
->sym
->name
,
13810 gen_dt
->generic
->sym
== sym
13811 ? &gen_dt
->generic
->next
->sym
->declared_at
13812 : &gen_dt
->generic
->sym
->declared_at
,
13813 &sym
->declared_at
))
13816 /* Resolve the finalizer procedures. */
13817 if (!gfc_resolve_finalizers (sym
, NULL
))
13820 if (sym
->attr
.is_class
&& sym
->ts
.u
.derived
== NULL
)
13822 /* Fix up incomplete CLASS symbols. */
13823 gfc_component
*data
= gfc_find_component (sym
, "_data", true, true, NULL
);
13824 gfc_component
*vptr
= gfc_find_component (sym
, "_vptr", true, true, NULL
);
13826 /* Nothing more to do for unlimited polymorphic entities. */
13827 if (data
->ts
.u
.derived
->attr
.unlimited_polymorphic
)
13829 else if (vptr
->ts
.u
.derived
== NULL
)
13831 gfc_symbol
*vtab
= gfc_find_derived_vtab (data
->ts
.u
.derived
);
13833 vptr
->ts
.u
.derived
= vtab
->ts
.u
.derived
;
13837 if (!resolve_fl_derived0 (sym
))
13840 /* Resolve the type-bound procedures. */
13841 if (!resolve_typebound_procedures (sym
))
13848 /* Check for formatted read and write DTIO procedures. */
13851 dtio_procs_present (gfc_symbol
*sym
)
13853 gfc_symbol
*derived
;
13855 if (sym
->ts
.type
== BT_CLASS
)
13856 derived
= CLASS_DATA (sym
)->ts
.u
.derived
;
13857 else if (sym
->ts
.type
== BT_DERIVED
)
13858 derived
= sym
->ts
.u
.derived
;
13862 return gfc_find_specific_dtio_proc (derived
, true, true) != NULL
13863 && gfc_find_specific_dtio_proc (derived
, false, true) != NULL
;
13868 resolve_fl_namelist (gfc_symbol
*sym
)
13874 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
13876 /* Check again, the check in match only works if NAMELIST comes
13878 if (nl
->sym
->as
&& nl
->sym
->as
->type
== AS_ASSUMED_SIZE
)
13880 gfc_error ("Assumed size array %qs in namelist %qs at %L is not "
13881 "allowed", nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
13885 if (nl
->sym
->as
&& nl
->sym
->as
->type
== AS_ASSUMED_SHAPE
13886 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST array object %qs "
13887 "with assumed shape in namelist %qs at %L",
13888 nl
->sym
->name
, sym
->name
, &sym
->declared_at
))
13891 if (is_non_constant_shape_array (nl
->sym
)
13892 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST array object %qs "
13893 "with nonconstant shape in namelist %qs at %L",
13894 nl
->sym
->name
, sym
->name
, &sym
->declared_at
))
13897 if (nl
->sym
->ts
.type
== BT_CHARACTER
13898 && (nl
->sym
->ts
.u
.cl
->length
== NULL
13899 || !gfc_is_constant_expr (nl
->sym
->ts
.u
.cl
->length
))
13900 && !gfc_notify_std (GFC_STD_F2003
, "NAMELIST object %qs with "
13901 "nonconstant character length in "
13902 "namelist %qs at %L", nl
->sym
->name
,
13903 sym
->name
, &sym
->declared_at
))
13906 dtio
= dtio_procs_present (nl
->sym
);
13908 if (nl
->sym
->ts
.type
== BT_CLASS
&& !dtio
)
13910 gfc_error ("NAMELIST object %qs in namelist %qs at %L is "
13911 "polymorphic and requires a defined input/output "
13912 "procedure", nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
13916 if (nl
->sym
->ts
.type
== BT_DERIVED
13917 && (nl
->sym
->ts
.u
.derived
->attr
.alloc_comp
13918 || nl
->sym
->ts
.u
.derived
->attr
.pointer_comp
))
13920 if (!gfc_notify_std (GFC_STD_F2003
, "NAMELIST object %qs in "
13921 "namelist %qs at %L with ALLOCATABLE "
13922 "or POINTER components", nl
->sym
->name
,
13923 sym
->name
, &sym
->declared_at
))
13929 /* Reject PRIVATE objects in a PUBLIC namelist. */
13930 if (gfc_check_symbol_access (sym
))
13932 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
13934 if (!nl
->sym
->attr
.use_assoc
13935 && !is_sym_host_assoc (nl
->sym
, sym
->ns
)
13936 && !gfc_check_symbol_access (nl
->sym
))
13938 gfc_error ("NAMELIST object %qs was declared PRIVATE and "
13939 "cannot be member of PUBLIC namelist %qs at %L",
13940 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
13944 /* If the derived type has specific DTIO procedures for both read and
13945 write then namelist objects with private components are OK. */
13946 if (dtio_procs_present (nl
->sym
))
13949 /* Types with private components that came here by USE-association. */
13950 if (nl
->sym
->ts
.type
== BT_DERIVED
13951 && derived_inaccessible (nl
->sym
->ts
.u
.derived
))
13953 gfc_error ("NAMELIST object %qs has use-associated PRIVATE "
13954 "components and cannot be member of namelist %qs at %L",
13955 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
13959 /* Types with private components that are defined in the same module. */
13960 if (nl
->sym
->ts
.type
== BT_DERIVED
13961 && !is_sym_host_assoc (nl
->sym
->ts
.u
.derived
, sym
->ns
)
13962 && nl
->sym
->ts
.u
.derived
->attr
.private_comp
)
13964 gfc_error ("NAMELIST object %qs has PRIVATE components and "
13965 "cannot be a member of PUBLIC namelist %qs at %L",
13966 nl
->sym
->name
, sym
->name
, &sym
->declared_at
);
13973 /* 14.1.2 A module or internal procedure represent local entities
13974 of the same type as a namelist member and so are not allowed. */
13975 for (nl
= sym
->namelist
; nl
; nl
= nl
->next
)
13977 if (nl
->sym
->ts
.kind
!= 0 && nl
->sym
->attr
.flavor
== FL_VARIABLE
)
13980 if (nl
->sym
->attr
.function
&& nl
->sym
== nl
->sym
->result
)
13981 if ((nl
->sym
== sym
->ns
->proc_name
)
13983 (sym
->ns
->parent
&& nl
->sym
== sym
->ns
->parent
->proc_name
))
13988 gfc_find_symbol (nl
->sym
->name
, sym
->ns
, 1, &nlsym
);
13989 if (nlsym
&& nlsym
->attr
.flavor
== FL_PROCEDURE
)
13991 gfc_error ("PROCEDURE attribute conflicts with NAMELIST "
13992 "attribute in %qs at %L", nlsym
->name
,
13993 &sym
->declared_at
);
14003 resolve_fl_parameter (gfc_symbol
*sym
)
14005 /* A parameter array's shape needs to be constant. */
14006 if (sym
->as
!= NULL
14007 && (sym
->as
->type
== AS_DEFERRED
14008 || is_non_constant_shape_array (sym
)))
14010 gfc_error ("Parameter array %qs at %L cannot be automatic "
14011 "or of deferred shape", sym
->name
, &sym
->declared_at
);
14015 /* Constraints on deferred type parameter. */
14016 if (!deferred_requirements (sym
))
14019 /* Make sure a parameter that has been implicitly typed still
14020 matches the implicit type, since PARAMETER statements can precede
14021 IMPLICIT statements. */
14022 if (sym
->attr
.implicit_type
14023 && !gfc_compare_types (&sym
->ts
, gfc_get_default_type (sym
->name
,
14026 gfc_error ("Implicitly typed PARAMETER %qs at %L doesn't match a "
14027 "later IMPLICIT type", sym
->name
, &sym
->declared_at
);
14031 /* Make sure the types of derived parameters are consistent. This
14032 type checking is deferred until resolution because the type may
14033 refer to a derived type from the host. */
14034 if (sym
->ts
.type
== BT_DERIVED
14035 && !gfc_compare_types (&sym
->ts
, &sym
->value
->ts
))
14037 gfc_error ("Incompatible derived type in PARAMETER at %L",
14038 &sym
->value
->where
);
14042 /* F03:C509,C514. */
14043 if (sym
->ts
.type
== BT_CLASS
)
14045 gfc_error ("CLASS variable %qs at %L cannot have the PARAMETER attribute",
14046 sym
->name
, &sym
->declared_at
);
14054 /* Do anything necessary to resolve a symbol. Right now, we just
14055 assume that an otherwise unknown symbol is a variable. This sort
14056 of thing commonly happens for symbols in module. */
14059 resolve_symbol (gfc_symbol
*sym
)
14061 int check_constant
, mp_flag
;
14062 gfc_symtree
*symtree
;
14063 gfc_symtree
*this_symtree
;
14066 symbol_attribute class_attr
;
14067 gfc_array_spec
*as
;
14068 bool saved_specification_expr
;
14074 /* No symbol will ever have union type; only components can be unions.
14075 Union type declaration symbols have type BT_UNKNOWN but flavor FL_UNION
14076 (just like derived type declaration symbols have flavor FL_DERIVED). */
14077 gcc_assert (sym
->ts
.type
!= BT_UNION
);
14079 /* Coarrayed polymorphic objects with allocatable or pointer components are
14080 yet unsupported for -fcoarray=lib. */
14081 if (flag_coarray
== GFC_FCOARRAY_LIB
&& sym
->ts
.type
== BT_CLASS
14082 && sym
->ts
.u
.derived
&& CLASS_DATA (sym
)
14083 && CLASS_DATA (sym
)->attr
.codimension
14084 && (CLASS_DATA (sym
)->ts
.u
.derived
->attr
.alloc_comp
14085 || CLASS_DATA (sym
)->ts
.u
.derived
->attr
.pointer_comp
))
14087 gfc_error ("Sorry, allocatable/pointer components in polymorphic (CLASS) "
14088 "type coarrays at %L are unsupported", &sym
->declared_at
);
14092 if (sym
->attr
.artificial
)
14095 if (sym
->attr
.unlimited_polymorphic
)
14098 if (sym
->attr
.flavor
== FL_UNKNOWN
14099 || (sym
->attr
.flavor
== FL_PROCEDURE
&& !sym
->attr
.intrinsic
14100 && !sym
->attr
.generic
&& !sym
->attr
.external
14101 && sym
->attr
.if_source
== IFSRC_UNKNOWN
14102 && sym
->ts
.type
== BT_UNKNOWN
))
14105 /* If we find that a flavorless symbol is an interface in one of the
14106 parent namespaces, find its symtree in this namespace, free the
14107 symbol and set the symtree to point to the interface symbol. */
14108 for (ns
= gfc_current_ns
->parent
; ns
; ns
= ns
->parent
)
14110 symtree
= gfc_find_symtree (ns
->sym_root
, sym
->name
);
14111 if (symtree
&& (symtree
->n
.sym
->generic
||
14112 (symtree
->n
.sym
->attr
.flavor
== FL_PROCEDURE
14113 && sym
->ns
->construct_entities
)))
14115 this_symtree
= gfc_find_symtree (gfc_current_ns
->sym_root
,
14117 if (this_symtree
->n
.sym
== sym
)
14119 symtree
->n
.sym
->refs
++;
14120 gfc_release_symbol (sym
);
14121 this_symtree
->n
.sym
= symtree
->n
.sym
;
14127 /* Otherwise give it a flavor according to such attributes as
14129 if (sym
->attr
.flavor
== FL_UNKNOWN
&& sym
->attr
.external
== 0
14130 && sym
->attr
.intrinsic
== 0)
14131 sym
->attr
.flavor
= FL_VARIABLE
;
14132 else if (sym
->attr
.flavor
== FL_UNKNOWN
)
14134 sym
->attr
.flavor
= FL_PROCEDURE
;
14135 if (sym
->attr
.dimension
)
14136 sym
->attr
.function
= 1;
14140 if (sym
->attr
.external
&& sym
->ts
.type
!= BT_UNKNOWN
&& !sym
->attr
.function
)
14141 gfc_add_function (&sym
->attr
, sym
->name
, &sym
->declared_at
);
14143 if (sym
->attr
.procedure
&& sym
->attr
.if_source
!= IFSRC_DECL
14144 && !resolve_procedure_interface (sym
))
14147 if (sym
->attr
.is_protected
&& !sym
->attr
.proc_pointer
14148 && (sym
->attr
.procedure
|| sym
->attr
.external
))
14150 if (sym
->attr
.external
)
14151 gfc_error ("PROTECTED attribute conflicts with EXTERNAL attribute "
14152 "at %L", &sym
->declared_at
);
14154 gfc_error ("PROCEDURE attribute conflicts with PROTECTED attribute "
14155 "at %L", &sym
->declared_at
);
14160 if (sym
->attr
.flavor
== FL_DERIVED
&& !resolve_fl_derived (sym
))
14163 else if ((sym
->attr
.flavor
== FL_STRUCT
|| sym
->attr
.flavor
== FL_UNION
)
14164 && !resolve_fl_struct (sym
))
14167 /* Symbols that are module procedures with results (functions) have
14168 the types and array specification copied for type checking in
14169 procedures that call them, as well as for saving to a module
14170 file. These symbols can't stand the scrutiny that their results
14172 mp_flag
= (sym
->result
!= NULL
&& sym
->result
!= sym
);
14174 /* Make sure that the intrinsic is consistent with its internal
14175 representation. This needs to be done before assigning a default
14176 type to avoid spurious warnings. */
14177 if (sym
->attr
.flavor
!= FL_MODULE
&& sym
->attr
.intrinsic
14178 && !gfc_resolve_intrinsic (sym
, &sym
->declared_at
))
14181 /* Resolve associate names. */
14183 resolve_assoc_var (sym
, true);
14185 /* Assign default type to symbols that need one and don't have one. */
14186 if (sym
->ts
.type
== BT_UNKNOWN
)
14188 if (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.flavor
== FL_PARAMETER
)
14190 gfc_set_default_type (sym
, 1, NULL
);
14193 if (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.external
14194 && !sym
->attr
.function
&& !sym
->attr
.subroutine
14195 && gfc_get_default_type (sym
->name
, sym
->ns
)->type
== BT_UNKNOWN
)
14196 gfc_add_subroutine (&sym
->attr
, sym
->name
, &sym
->declared_at
);
14198 if (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
)
14200 /* The specific case of an external procedure should emit an error
14201 in the case that there is no implicit type. */
14204 if (!sym
->attr
.mixed_entry_master
)
14205 gfc_set_default_type (sym
, sym
->attr
.external
, NULL
);
14209 /* Result may be in another namespace. */
14210 resolve_symbol (sym
->result
);
14212 if (!sym
->result
->attr
.proc_pointer
)
14214 sym
->ts
= sym
->result
->ts
;
14215 sym
->as
= gfc_copy_array_spec (sym
->result
->as
);
14216 sym
->attr
.dimension
= sym
->result
->attr
.dimension
;
14217 sym
->attr
.pointer
= sym
->result
->attr
.pointer
;
14218 sym
->attr
.allocatable
= sym
->result
->attr
.allocatable
;
14219 sym
->attr
.contiguous
= sym
->result
->attr
.contiguous
;
14224 else if (mp_flag
&& sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
)
14226 bool saved_specification_expr
= specification_expr
;
14227 specification_expr
= true;
14228 gfc_resolve_array_spec (sym
->result
->as
, false);
14229 specification_expr
= saved_specification_expr
;
14232 if (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
)
14234 as
= CLASS_DATA (sym
)->as
;
14235 class_attr
= CLASS_DATA (sym
)->attr
;
14236 class_attr
.pointer
= class_attr
.class_pointer
;
14240 class_attr
= sym
->attr
;
14245 if (sym
->attr
.contiguous
14246 && (!class_attr
.dimension
14247 || (as
->type
!= AS_ASSUMED_SHAPE
&& as
->type
!= AS_ASSUMED_RANK
14248 && !class_attr
.pointer
)))
14250 gfc_error ("%qs at %L has the CONTIGUOUS attribute but is not an "
14251 "array pointer or an assumed-shape or assumed-rank array",
14252 sym
->name
, &sym
->declared_at
);
14256 /* Assumed size arrays and assumed shape arrays must be dummy
14257 arguments. Array-spec's of implied-shape should have been resolved to
14258 AS_EXPLICIT already. */
14262 gcc_assert (as
->type
!= AS_IMPLIED_SHAPE
);
14263 if (((as
->type
== AS_ASSUMED_SIZE
&& !as
->cp_was_assumed
)
14264 || as
->type
== AS_ASSUMED_SHAPE
)
14265 && !sym
->attr
.dummy
&& !sym
->attr
.select_type_temporary
)
14267 if (as
->type
== AS_ASSUMED_SIZE
)
14268 gfc_error ("Assumed size array at %L must be a dummy argument",
14269 &sym
->declared_at
);
14271 gfc_error ("Assumed shape array at %L must be a dummy argument",
14272 &sym
->declared_at
);
14275 /* TS 29113, C535a. */
14276 if (as
->type
== AS_ASSUMED_RANK
&& !sym
->attr
.dummy
14277 && !sym
->attr
.select_type_temporary
)
14279 gfc_error ("Assumed-rank array at %L must be a dummy argument",
14280 &sym
->declared_at
);
14283 if (as
->type
== AS_ASSUMED_RANK
14284 && (sym
->attr
.codimension
|| sym
->attr
.value
))
14286 gfc_error ("Assumed-rank array at %L may not have the VALUE or "
14287 "CODIMENSION attribute", &sym
->declared_at
);
14292 /* Make sure symbols with known intent or optional are really dummy
14293 variable. Because of ENTRY statement, this has to be deferred
14294 until resolution time. */
14296 if (!sym
->attr
.dummy
14297 && (sym
->attr
.optional
|| sym
->attr
.intent
!= INTENT_UNKNOWN
))
14299 gfc_error ("Symbol at %L is not a DUMMY variable", &sym
->declared_at
);
14303 if (sym
->attr
.value
&& !sym
->attr
.dummy
)
14305 gfc_error ("%qs at %L cannot have the VALUE attribute because "
14306 "it is not a dummy argument", sym
->name
, &sym
->declared_at
);
14310 if (sym
->attr
.value
&& sym
->ts
.type
== BT_CHARACTER
)
14312 gfc_charlen
*cl
= sym
->ts
.u
.cl
;
14313 if (!cl
|| !cl
->length
|| cl
->length
->expr_type
!= EXPR_CONSTANT
)
14315 gfc_error ("Character dummy variable %qs at %L with VALUE "
14316 "attribute must have constant length",
14317 sym
->name
, &sym
->declared_at
);
14321 if (sym
->ts
.is_c_interop
14322 && mpz_cmp_si (cl
->length
->value
.integer
, 1) != 0)
14324 gfc_error ("C interoperable character dummy variable %qs at %L "
14325 "with VALUE attribute must have length one",
14326 sym
->name
, &sym
->declared_at
);
14331 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->attr
.is_iso_c
14332 && sym
->ts
.u
.derived
->attr
.generic
)
14334 sym
->ts
.u
.derived
= gfc_find_dt_in_generic (sym
->ts
.u
.derived
);
14335 if (!sym
->ts
.u
.derived
)
14337 gfc_error ("The derived type %qs at %L is of type %qs, "
14338 "which has not been defined", sym
->name
,
14339 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
14340 sym
->ts
.type
= BT_UNKNOWN
;
14345 /* Use the same constraints as TYPE(*), except for the type check
14346 and that only scalars and assumed-size arrays are permitted. */
14347 if (sym
->attr
.ext_attr
& (1 << EXT_ATTR_NO_ARG_CHECK
))
14349 if (!sym
->attr
.dummy
)
14351 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall be "
14352 "a dummy argument", sym
->name
, &sym
->declared_at
);
14356 if (sym
->ts
.type
!= BT_ASSUMED
&& sym
->ts
.type
!= BT_INTEGER
14357 && sym
->ts
.type
!= BT_REAL
&& sym
->ts
.type
!= BT_LOGICAL
14358 && sym
->ts
.type
!= BT_COMPLEX
)
14360 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall be "
14361 "of type TYPE(*) or of an numeric intrinsic type",
14362 sym
->name
, &sym
->declared_at
);
14366 if (sym
->attr
.allocatable
|| sym
->attr
.codimension
14367 || sym
->attr
.pointer
|| sym
->attr
.value
)
14369 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may not "
14370 "have the ALLOCATABLE, CODIMENSION, POINTER or VALUE "
14371 "attribute", sym
->name
, &sym
->declared_at
);
14375 if (sym
->attr
.intent
== INTENT_OUT
)
14377 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute may not "
14378 "have the INTENT(OUT) attribute",
14379 sym
->name
, &sym
->declared_at
);
14382 if (sym
->attr
.dimension
&& sym
->as
->type
!= AS_ASSUMED_SIZE
)
14384 gfc_error ("Variable %s at %L with NO_ARG_CHECK attribute shall "
14385 "either be a scalar or an assumed-size array",
14386 sym
->name
, &sym
->declared_at
);
14390 /* Set the type to TYPE(*) and add a dimension(*) to ensure
14391 NO_ARG_CHECK is correctly handled in trans*.c, e.g. with
14393 sym
->ts
.type
= BT_ASSUMED
;
14394 sym
->as
= gfc_get_array_spec ();
14395 sym
->as
->type
= AS_ASSUMED_SIZE
;
14397 sym
->as
->lower
[0] = gfc_get_int_expr (gfc_default_integer_kind
, NULL
, 1);
14399 else if (sym
->ts
.type
== BT_ASSUMED
)
14401 /* TS 29113, C407a. */
14402 if (!sym
->attr
.dummy
)
14404 gfc_error ("Assumed type of variable %s at %L is only permitted "
14405 "for dummy variables", sym
->name
, &sym
->declared_at
);
14408 if (sym
->attr
.allocatable
|| sym
->attr
.codimension
14409 || sym
->attr
.pointer
|| sym
->attr
.value
)
14411 gfc_error ("Assumed-type variable %s at %L may not have the "
14412 "ALLOCATABLE, CODIMENSION, POINTER or VALUE attribute",
14413 sym
->name
, &sym
->declared_at
);
14416 if (sym
->attr
.intent
== INTENT_OUT
)
14418 gfc_error ("Assumed-type variable %s at %L may not have the "
14419 "INTENT(OUT) attribute",
14420 sym
->name
, &sym
->declared_at
);
14423 if (sym
->attr
.dimension
&& sym
->as
->type
== AS_EXPLICIT
)
14425 gfc_error ("Assumed-type variable %s at %L shall not be an "
14426 "explicit-shape array", sym
->name
, &sym
->declared_at
);
14431 /* If the symbol is marked as bind(c), verify it's type and kind. Do not
14432 do this for something that was implicitly typed because that is handled
14433 in gfc_set_default_type. Handle dummy arguments and procedure
14434 definitions separately. Also, anything that is use associated is not
14435 handled here but instead is handled in the module it is declared in.
14436 Finally, derived type definitions are allowed to be BIND(C) since that
14437 only implies that they're interoperable, and they are checked fully for
14438 interoperability when a variable is declared of that type. */
14439 if (sym
->attr
.is_bind_c
&& sym
->attr
.implicit_type
== 0 &&
14440 sym
->attr
.use_assoc
== 0 && sym
->attr
.dummy
== 0 &&
14441 sym
->attr
.flavor
!= FL_PROCEDURE
&& sym
->attr
.flavor
!= FL_DERIVED
)
14445 /* First, make sure the variable is declared at the
14446 module-level scope (J3/04-007, Section 15.3). */
14447 if (sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
&&
14448 sym
->attr
.in_common
== 0)
14450 gfc_error ("Variable %qs at %L cannot be BIND(C) because it "
14451 "is neither a COMMON block nor declared at the "
14452 "module level scope", sym
->name
, &(sym
->declared_at
));
14455 else if (sym
->common_head
!= NULL
)
14457 t
= verify_com_block_vars_c_interop (sym
->common_head
);
14461 /* If type() declaration, we need to verify that the components
14462 of the given type are all C interoperable, etc. */
14463 if (sym
->ts
.type
== BT_DERIVED
&&
14464 sym
->ts
.u
.derived
->attr
.is_c_interop
!= 1)
14466 /* Make sure the user marked the derived type as BIND(C). If
14467 not, call the verify routine. This could print an error
14468 for the derived type more than once if multiple variables
14469 of that type are declared. */
14470 if (sym
->ts
.u
.derived
->attr
.is_bind_c
!= 1)
14471 verify_bind_c_derived_type (sym
->ts
.u
.derived
);
14475 /* Verify the variable itself as C interoperable if it
14476 is BIND(C). It is not possible for this to succeed if
14477 the verify_bind_c_derived_type failed, so don't have to handle
14478 any error returned by verify_bind_c_derived_type. */
14479 t
= verify_bind_c_sym (sym
, &(sym
->ts
), sym
->attr
.in_common
,
14480 sym
->common_block
);
14485 /* clear the is_bind_c flag to prevent reporting errors more than
14486 once if something failed. */
14487 sym
->attr
.is_bind_c
= 0;
14492 /* If a derived type symbol has reached this point, without its
14493 type being declared, we have an error. Notice that most
14494 conditions that produce undefined derived types have already
14495 been dealt with. However, the likes of:
14496 implicit type(t) (t) ..... call foo (t) will get us here if
14497 the type is not declared in the scope of the implicit
14498 statement. Change the type to BT_UNKNOWN, both because it is so
14499 and to prevent an ICE. */
14500 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->attr
.is_iso_c
14501 && sym
->ts
.u
.derived
->components
== NULL
14502 && !sym
->ts
.u
.derived
->attr
.zero_comp
)
14504 gfc_error ("The derived type %qs at %L is of type %qs, "
14505 "which has not been defined", sym
->name
,
14506 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
14507 sym
->ts
.type
= BT_UNKNOWN
;
14511 /* Make sure that the derived type has been resolved and that the
14512 derived type is visible in the symbol's namespace, if it is a
14513 module function and is not PRIVATE. */
14514 if (sym
->ts
.type
== BT_DERIVED
14515 && sym
->ts
.u
.derived
->attr
.use_assoc
14516 && sym
->ns
->proc_name
14517 && sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
14518 && !resolve_fl_derived (sym
->ts
.u
.derived
))
14521 /* Unless the derived-type declaration is use associated, Fortran 95
14522 does not allow public entries of private derived types.
14523 See 4.4.1 (F95) and 4.5.1.1 (F2003); and related interpretation
14524 161 in 95-006r3. */
14525 if (sym
->ts
.type
== BT_DERIVED
14526 && sym
->ns
->proc_name
&& sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
14527 && !sym
->ts
.u
.derived
->attr
.use_assoc
14528 && gfc_check_symbol_access (sym
)
14529 && !gfc_check_symbol_access (sym
->ts
.u
.derived
)
14530 && !gfc_notify_std (GFC_STD_F2003
, "PUBLIC %s %qs at %L of PRIVATE "
14531 "derived type %qs",
14532 (sym
->attr
.flavor
== FL_PARAMETER
)
14533 ? "parameter" : "variable",
14534 sym
->name
, &sym
->declared_at
,
14535 sym
->ts
.u
.derived
->name
))
14538 /* F2008, C1302. */
14539 if (sym
->ts
.type
== BT_DERIVED
14540 && ((sym
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
14541 && sym
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_LOCK_TYPE
)
14542 || sym
->ts
.u
.derived
->attr
.lock_comp
)
14543 && !sym
->attr
.codimension
&& !sym
->ts
.u
.derived
->attr
.coarray_comp
)
14545 gfc_error ("Variable %s at %L of type LOCK_TYPE or with subcomponent of "
14546 "type LOCK_TYPE must be a coarray", sym
->name
,
14547 &sym
->declared_at
);
14551 /* TS18508, C702/C703. */
14552 if (sym
->ts
.type
== BT_DERIVED
14553 && ((sym
->ts
.u
.derived
->from_intmod
== INTMOD_ISO_FORTRAN_ENV
14554 && sym
->ts
.u
.derived
->intmod_sym_id
== ISOFORTRAN_EVENT_TYPE
)
14555 || sym
->ts
.u
.derived
->attr
.event_comp
)
14556 && !sym
->attr
.codimension
&& !sym
->ts
.u
.derived
->attr
.coarray_comp
)
14558 gfc_error ("Variable %s at %L of type EVENT_TYPE or with subcomponent of "
14559 "type LOCK_TYPE must be a coarray", sym
->name
,
14560 &sym
->declared_at
);
14564 /* An assumed-size array with INTENT(OUT) shall not be of a type for which
14565 default initialization is defined (5.1.2.4.4). */
14566 if (sym
->ts
.type
== BT_DERIVED
14568 && sym
->attr
.intent
== INTENT_OUT
14570 && sym
->as
->type
== AS_ASSUMED_SIZE
)
14572 for (c
= sym
->ts
.u
.derived
->components
; c
; c
= c
->next
)
14574 if (c
->initializer
)
14576 gfc_error ("The INTENT(OUT) dummy argument %qs at %L is "
14577 "ASSUMED SIZE and so cannot have a default initializer",
14578 sym
->name
, &sym
->declared_at
);
14585 if (sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.dummy
14586 && sym
->attr
.intent
== INTENT_OUT
&& sym
->attr
.lock_comp
)
14588 gfc_error ("Dummy argument %qs at %L of LOCK_TYPE shall not be "
14589 "INTENT(OUT)", sym
->name
, &sym
->declared_at
);
14594 if (sym
->ts
.type
== BT_DERIVED
&& sym
->attr
.dummy
14595 && sym
->attr
.intent
== INTENT_OUT
&& sym
->attr
.event_comp
)
14597 gfc_error ("Dummy argument %qs at %L of EVENT_TYPE shall not be "
14598 "INTENT(OUT)", sym
->name
, &sym
->declared_at
);
14603 if ((((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
14604 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
14605 && CLASS_DATA (sym
)->attr
.coarray_comp
))
14606 || class_attr
.codimension
)
14607 && (sym
->attr
.result
|| sym
->result
== sym
))
14609 gfc_error ("Function result %qs at %L shall not be a coarray or have "
14610 "a coarray component", sym
->name
, &sym
->declared_at
);
14615 if (sym
->attr
.codimension
&& sym
->ts
.type
== BT_DERIVED
14616 && sym
->ts
.u
.derived
->ts
.is_iso_c
)
14618 gfc_error ("Variable %qs at %L of TYPE(C_PTR) or TYPE(C_FUNPTR) "
14619 "shall not be a coarray", sym
->name
, &sym
->declared_at
);
14624 if (((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
14625 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
14626 && CLASS_DATA (sym
)->attr
.coarray_comp
))
14627 && (class_attr
.codimension
|| class_attr
.pointer
|| class_attr
.dimension
14628 || class_attr
.allocatable
))
14630 gfc_error ("Variable %qs at %L with coarray component shall be a "
14631 "nonpointer, nonallocatable scalar, which is not a coarray",
14632 sym
->name
, &sym
->declared_at
);
14636 /* F2008, C526. The function-result case was handled above. */
14637 if (class_attr
.codimension
14638 && !(class_attr
.allocatable
|| sym
->attr
.dummy
|| sym
->attr
.save
14639 || sym
->attr
.select_type_temporary
14640 || (sym
->ns
->save_all
&& !sym
->attr
.automatic
)
14641 || sym
->ns
->proc_name
->attr
.flavor
== FL_MODULE
14642 || sym
->ns
->proc_name
->attr
.is_main_program
14643 || sym
->attr
.function
|| sym
->attr
.result
|| sym
->attr
.use_assoc
))
14645 gfc_error ("Variable %qs at %L is a coarray and is not ALLOCATABLE, SAVE "
14646 "nor a dummy argument", sym
->name
, &sym
->declared_at
);
14650 else if (class_attr
.codimension
&& !sym
->attr
.select_type_temporary
14651 && !class_attr
.allocatable
&& as
&& as
->cotype
== AS_DEFERRED
)
14653 gfc_error ("Coarray variable %qs at %L shall not have codimensions with "
14654 "deferred shape", sym
->name
, &sym
->declared_at
);
14657 else if (class_attr
.codimension
&& class_attr
.allocatable
&& as
14658 && (as
->cotype
!= AS_DEFERRED
|| as
->type
!= AS_DEFERRED
))
14660 gfc_error ("Allocatable coarray variable %qs at %L must have "
14661 "deferred shape", sym
->name
, &sym
->declared_at
);
14666 if ((((sym
->ts
.type
== BT_DERIVED
&& sym
->ts
.u
.derived
->attr
.coarray_comp
)
14667 || (sym
->ts
.type
== BT_CLASS
&& sym
->attr
.class_ok
14668 && CLASS_DATA (sym
)->attr
.coarray_comp
))
14669 || (class_attr
.codimension
&& class_attr
.allocatable
))
14670 && sym
->attr
.dummy
&& sym
->attr
.intent
== INTENT_OUT
)
14672 gfc_error ("Variable %qs at %L is INTENT(OUT) and can thus not be an "
14673 "allocatable coarray or have coarray components",
14674 sym
->name
, &sym
->declared_at
);
14678 if (class_attr
.codimension
&& sym
->attr
.dummy
14679 && sym
->ns
->proc_name
&& sym
->ns
->proc_name
->attr
.is_bind_c
)
14681 gfc_error ("Coarray dummy variable %qs at %L not allowed in BIND(C) "
14682 "procedure %qs", sym
->name
, &sym
->declared_at
,
14683 sym
->ns
->proc_name
->name
);
14687 if (sym
->ts
.type
== BT_LOGICAL
14688 && ((sym
->attr
.function
&& sym
->attr
.is_bind_c
&& sym
->result
== sym
)
14689 || ((sym
->attr
.dummy
|| sym
->attr
.result
) && sym
->ns
->proc_name
14690 && sym
->ns
->proc_name
->attr
.is_bind_c
)))
14693 for (i
= 0; gfc_logical_kinds
[i
].kind
; i
++)
14694 if (gfc_logical_kinds
[i
].kind
== sym
->ts
.kind
)
14696 if (!gfc_logical_kinds
[i
].c_bool
&& sym
->attr
.dummy
14697 && !gfc_notify_std (GFC_STD_GNU
, "LOGICAL dummy argument %qs at "
14698 "%L with non-C_Bool kind in BIND(C) procedure "
14699 "%qs", sym
->name
, &sym
->declared_at
,
14700 sym
->ns
->proc_name
->name
))
14702 else if (!gfc_logical_kinds
[i
].c_bool
14703 && !gfc_notify_std (GFC_STD_GNU
, "LOGICAL result variable "
14704 "%qs at %L with non-C_Bool kind in "
14705 "BIND(C) procedure %qs", sym
->name
,
14707 sym
->attr
.function
? sym
->name
14708 : sym
->ns
->proc_name
->name
))
14712 switch (sym
->attr
.flavor
)
14715 if (!resolve_fl_variable (sym
, mp_flag
))
14720 if (sym
->formal
&& !sym
->formal_ns
)
14722 /* Check that none of the arguments are a namelist. */
14723 gfc_formal_arglist
*formal
= sym
->formal
;
14725 for (; formal
; formal
= formal
->next
)
14726 if (formal
->sym
&& formal
->sym
->attr
.flavor
== FL_NAMELIST
)
14728 gfc_error ("Namelist '%s' can not be an argument to "
14729 "subroutine or function at %L",
14730 formal
->sym
->name
, &sym
->declared_at
);
14735 if (!resolve_fl_procedure (sym
, mp_flag
))
14740 if (!resolve_fl_namelist (sym
))
14745 if (!resolve_fl_parameter (sym
))
14753 /* Resolve array specifier. Check as well some constraints
14754 on COMMON blocks. */
14756 check_constant
= sym
->attr
.in_common
&& !sym
->attr
.pointer
;
14758 /* Set the formal_arg_flag so that check_conflict will not throw
14759 an error for host associated variables in the specification
14760 expression for an array_valued function. */
14761 if (sym
->attr
.function
&& sym
->as
)
14762 formal_arg_flag
= true;
14764 saved_specification_expr
= specification_expr
;
14765 specification_expr
= true;
14766 gfc_resolve_array_spec (sym
->as
, check_constant
);
14767 specification_expr
= saved_specification_expr
;
14769 formal_arg_flag
= false;
14771 /* Resolve formal namespaces. */
14772 if (sym
->formal_ns
&& sym
->formal_ns
!= gfc_current_ns
14773 && !sym
->attr
.contained
&& !sym
->attr
.intrinsic
)
14774 gfc_resolve (sym
->formal_ns
);
14776 /* Make sure the formal namespace is present. */
14777 if (sym
->formal
&& !sym
->formal_ns
)
14779 gfc_formal_arglist
*formal
= sym
->formal
;
14780 while (formal
&& !formal
->sym
)
14781 formal
= formal
->next
;
14785 sym
->formal_ns
= formal
->sym
->ns
;
14786 if (sym
->ns
!= formal
->sym
->ns
)
14787 sym
->formal_ns
->refs
++;
14791 /* Check threadprivate restrictions. */
14792 if (sym
->attr
.threadprivate
&& !sym
->attr
.save
14793 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
)
14794 && (!sym
->attr
.in_common
14795 && sym
->module
== NULL
14796 && (sym
->ns
->proc_name
== NULL
14797 || sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)))
14798 gfc_error ("Threadprivate at %L isn't SAVEd", &sym
->declared_at
);
14800 /* Check omp declare target restrictions. */
14801 if (sym
->attr
.omp_declare_target
14802 && sym
->attr
.flavor
== FL_VARIABLE
14804 && !(sym
->ns
->save_all
&& !sym
->attr
.automatic
)
14805 && (!sym
->attr
.in_common
14806 && sym
->module
== NULL
14807 && (sym
->ns
->proc_name
== NULL
14808 || sym
->ns
->proc_name
->attr
.flavor
!= FL_MODULE
)))
14809 gfc_error ("!$OMP DECLARE TARGET variable %qs at %L isn't SAVEd",
14810 sym
->name
, &sym
->declared_at
);
14812 /* If we have come this far we can apply default-initializers, as
14813 described in 14.7.5, to those variables that have not already
14814 been assigned one. */
14815 if (sym
->ts
.type
== BT_DERIVED
14817 && !sym
->attr
.allocatable
14818 && !sym
->attr
.alloc_comp
)
14820 symbol_attribute
*a
= &sym
->attr
;
14822 if ((!a
->save
&& !a
->dummy
&& !a
->pointer
14823 && !a
->in_common
&& !a
->use_assoc
14824 && !a
->result
&& !a
->function
)
14825 || (a
->dummy
&& a
->intent
== INTENT_OUT
&& !a
->pointer
))
14826 apply_default_init (sym
);
14827 else if (a
->function
&& sym
->result
&& a
->access
!= ACCESS_PRIVATE
14828 && (sym
->ts
.u
.derived
->attr
.alloc_comp
14829 || sym
->ts
.u
.derived
->attr
.pointer_comp
))
14830 /* Mark the result symbol to be referenced, when it has allocatable
14832 sym
->result
->attr
.referenced
= 1;
14835 if (sym
->ts
.type
== BT_CLASS
&& sym
->ns
== gfc_current_ns
14836 && sym
->attr
.dummy
&& sym
->attr
.intent
== INTENT_OUT
14837 && !CLASS_DATA (sym
)->attr
.class_pointer
14838 && !CLASS_DATA (sym
)->attr
.allocatable
)
14839 apply_default_init (sym
);
14841 /* If this symbol has a type-spec, check it. */
14842 if (sym
->attr
.flavor
== FL_VARIABLE
|| sym
->attr
.flavor
== FL_PARAMETER
14843 || (sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.function
))
14844 if (!resolve_typespec_used (&sym
->ts
, &sym
->declared_at
, sym
->name
))
14849 /************* Resolve DATA statements *************/
14853 gfc_data_value
*vnode
;
14859 /* Advance the values structure to point to the next value in the data list. */
14862 next_data_value (void)
14864 while (mpz_cmp_ui (values
.left
, 0) == 0)
14867 if (values
.vnode
->next
== NULL
)
14870 values
.vnode
= values
.vnode
->next
;
14871 mpz_set (values
.left
, values
.vnode
->repeat
);
14879 check_data_variable (gfc_data_variable
*var
, locus
*where
)
14885 ar_type mark
= AR_UNKNOWN
;
14887 mpz_t section_index
[GFC_MAX_DIMENSIONS
];
14893 if (!gfc_resolve_expr (var
->expr
))
14897 mpz_init_set_si (offset
, 0);
14900 if (e
->expr_type
== EXPR_FUNCTION
&& e
->value
.function
.isym
14901 && e
->value
.function
.isym
->id
== GFC_ISYM_CAF_GET
)
14902 e
= e
->value
.function
.actual
->expr
;
14904 if (e
->expr_type
!= EXPR_VARIABLE
)
14905 gfc_internal_error ("check_data_variable(): Bad expression");
14907 sym
= e
->symtree
->n
.sym
;
14909 if (sym
->ns
->is_block_data
&& !sym
->attr
.in_common
)
14911 gfc_error ("BLOCK DATA element %qs at %L must be in COMMON",
14912 sym
->name
, &sym
->declared_at
);
14915 if (e
->ref
== NULL
&& sym
->as
)
14917 gfc_error ("DATA array %qs at %L must be specified in a previous"
14918 " declaration", sym
->name
, where
);
14922 has_pointer
= sym
->attr
.pointer
;
14924 if (gfc_is_coindexed (e
))
14926 gfc_error ("DATA element %qs at %L cannot have a coindex", sym
->name
,
14931 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
14933 if (ref
->type
== REF_COMPONENT
&& ref
->u
.c
.component
->attr
.pointer
)
14937 && ref
->type
== REF_ARRAY
14938 && ref
->u
.ar
.type
!= AR_FULL
)
14940 gfc_error ("DATA element %qs at %L is a pointer and so must "
14941 "be a full array", sym
->name
, where
);
14946 if (e
->rank
== 0 || has_pointer
)
14948 mpz_init_set_ui (size
, 1);
14955 /* Find the array section reference. */
14956 for (ref
= e
->ref
; ref
; ref
= ref
->next
)
14958 if (ref
->type
!= REF_ARRAY
)
14960 if (ref
->u
.ar
.type
== AR_ELEMENT
)
14966 /* Set marks according to the reference pattern. */
14967 switch (ref
->u
.ar
.type
)
14975 /* Get the start position of array section. */
14976 gfc_get_section_index (ar
, section_index
, &offset
);
14981 gcc_unreachable ();
14984 if (!gfc_array_size (e
, &size
))
14986 gfc_error ("Nonconstant array section at %L in DATA statement",
14988 mpz_clear (offset
);
14995 while (mpz_cmp_ui (size
, 0) > 0)
14997 if (!next_data_value ())
14999 gfc_error ("DATA statement at %L has more variables than values",
15005 t
= gfc_check_assign (var
->expr
, values
.vnode
->expr
, 0);
15009 /* If we have more than one element left in the repeat count,
15010 and we have more than one element left in the target variable,
15011 then create a range assignment. */
15012 /* FIXME: Only done for full arrays for now, since array sections
15014 if (mark
== AR_FULL
&& ref
&& ref
->next
== NULL
15015 && mpz_cmp_ui (values
.left
, 1) > 0 && mpz_cmp_ui (size
, 1) > 0)
15019 if (mpz_cmp (size
, values
.left
) >= 0)
15021 mpz_init_set (range
, values
.left
);
15022 mpz_sub (size
, size
, values
.left
);
15023 mpz_set_ui (values
.left
, 0);
15027 mpz_init_set (range
, size
);
15028 mpz_sub (values
.left
, values
.left
, size
);
15029 mpz_set_ui (size
, 0);
15032 t
= gfc_assign_data_value (var
->expr
, values
.vnode
->expr
,
15035 mpz_add (offset
, offset
, range
);
15042 /* Assign initial value to symbol. */
15045 mpz_sub_ui (values
.left
, values
.left
, 1);
15046 mpz_sub_ui (size
, size
, 1);
15048 t
= gfc_assign_data_value (var
->expr
, values
.vnode
->expr
,
15053 if (mark
== AR_FULL
)
15054 mpz_add_ui (offset
, offset
, 1);
15056 /* Modify the array section indexes and recalculate the offset
15057 for next element. */
15058 else if (mark
== AR_SECTION
)
15059 gfc_advance_section (section_index
, ar
, &offset
);
15063 if (mark
== AR_SECTION
)
15065 for (i
= 0; i
< ar
->dimen
; i
++)
15066 mpz_clear (section_index
[i
]);
15070 mpz_clear (offset
);
15076 static bool traverse_data_var (gfc_data_variable
*, locus
*);
15078 /* Iterate over a list of elements in a DATA statement. */
15081 traverse_data_list (gfc_data_variable
*var
, locus
*where
)
15084 iterator_stack frame
;
15085 gfc_expr
*e
, *start
, *end
, *step
;
15086 bool retval
= true;
15088 mpz_init (frame
.value
);
15091 start
= gfc_copy_expr (var
->iter
.start
);
15092 end
= gfc_copy_expr (var
->iter
.end
);
15093 step
= gfc_copy_expr (var
->iter
.step
);
15095 if (!gfc_simplify_expr (start
, 1)
15096 || start
->expr_type
!= EXPR_CONSTANT
)
15098 gfc_error ("start of implied-do loop at %L could not be "
15099 "simplified to a constant value", &start
->where
);
15103 if (!gfc_simplify_expr (end
, 1)
15104 || end
->expr_type
!= EXPR_CONSTANT
)
15106 gfc_error ("end of implied-do loop at %L could not be "
15107 "simplified to a constant value", &start
->where
);
15111 if (!gfc_simplify_expr (step
, 1)
15112 || step
->expr_type
!= EXPR_CONSTANT
)
15114 gfc_error ("step of implied-do loop at %L could not be "
15115 "simplified to a constant value", &start
->where
);
15120 mpz_set (trip
, end
->value
.integer
);
15121 mpz_sub (trip
, trip
, start
->value
.integer
);
15122 mpz_add (trip
, trip
, step
->value
.integer
);
15124 mpz_div (trip
, trip
, step
->value
.integer
);
15126 mpz_set (frame
.value
, start
->value
.integer
);
15128 frame
.prev
= iter_stack
;
15129 frame
.variable
= var
->iter
.var
->symtree
;
15130 iter_stack
= &frame
;
15132 while (mpz_cmp_ui (trip
, 0) > 0)
15134 if (!traverse_data_var (var
->list
, where
))
15140 e
= gfc_copy_expr (var
->expr
);
15141 if (!gfc_simplify_expr (e
, 1))
15148 mpz_add (frame
.value
, frame
.value
, step
->value
.integer
);
15150 mpz_sub_ui (trip
, trip
, 1);
15154 mpz_clear (frame
.value
);
15157 gfc_free_expr (start
);
15158 gfc_free_expr (end
);
15159 gfc_free_expr (step
);
15161 iter_stack
= frame
.prev
;
15166 /* Type resolve variables in the variable list of a DATA statement. */
15169 traverse_data_var (gfc_data_variable
*var
, locus
*where
)
15173 for (; var
; var
= var
->next
)
15175 if (var
->expr
== NULL
)
15176 t
= traverse_data_list (var
, where
);
15178 t
= check_data_variable (var
, where
);
15188 /* Resolve the expressions and iterators associated with a data statement.
15189 This is separate from the assignment checking because data lists should
15190 only be resolved once. */
15193 resolve_data_variables (gfc_data_variable
*d
)
15195 for (; d
; d
= d
->next
)
15197 if (d
->list
== NULL
)
15199 if (!gfc_resolve_expr (d
->expr
))
15204 if (!gfc_resolve_iterator (&d
->iter
, false, true))
15207 if (!resolve_data_variables (d
->list
))
15216 /* Resolve a single DATA statement. We implement this by storing a pointer to
15217 the value list into static variables, and then recursively traversing the
15218 variables list, expanding iterators and such. */
15221 resolve_data (gfc_data
*d
)
15224 if (!resolve_data_variables (d
->var
))
15227 values
.vnode
= d
->value
;
15228 if (d
->value
== NULL
)
15229 mpz_set_ui (values
.left
, 0);
15231 mpz_set (values
.left
, d
->value
->repeat
);
15233 if (!traverse_data_var (d
->var
, &d
->where
))
15236 /* At this point, we better not have any values left. */
15238 if (next_data_value ())
15239 gfc_error ("DATA statement at %L has more values than variables",
15244 /* 12.6 Constraint: In a pure subprogram any variable which is in common or
15245 accessed by host or use association, is a dummy argument to a pure function,
15246 is a dummy argument with INTENT (IN) to a pure subroutine, or an object that
15247 is storage associated with any such variable, shall not be used in the
15248 following contexts: (clients of this function). */
15250 /* Determines if a variable is not 'pure', i.e., not assignable within a pure
15251 procedure. Returns zero if assignment is OK, nonzero if there is a
15254 gfc_impure_variable (gfc_symbol
*sym
)
15259 if (sym
->attr
.use_assoc
|| sym
->attr
.in_common
)
15262 /* Check if the symbol's ns is inside the pure procedure. */
15263 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
15267 if (ns
->proc_name
->attr
.flavor
== FL_PROCEDURE
&& !sym
->attr
.function
)
15271 proc
= sym
->ns
->proc_name
;
15272 if (sym
->attr
.dummy
15273 && ((proc
->attr
.subroutine
&& sym
->attr
.intent
== INTENT_IN
)
15274 || proc
->attr
.function
))
15277 /* TODO: Sort out what can be storage associated, if anything, and include
15278 it here. In principle equivalences should be scanned but it does not
15279 seem to be possible to storage associate an impure variable this way. */
15284 /* Test whether a symbol is pure or not. For a NULL pointer, checks if the
15285 current namespace is inside a pure procedure. */
15288 gfc_pure (gfc_symbol
*sym
)
15290 symbol_attribute attr
;
15295 /* Check if the current namespace or one of its parents
15296 belongs to a pure procedure. */
15297 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
15299 sym
= ns
->proc_name
;
15303 if (attr
.flavor
== FL_PROCEDURE
&& attr
.pure
)
15311 return attr
.flavor
== FL_PROCEDURE
&& attr
.pure
;
15315 /* Test whether a symbol is implicitly pure or not. For a NULL pointer,
15316 checks if the current namespace is implicitly pure. Note that this
15317 function returns false for a PURE procedure. */
15320 gfc_implicit_pure (gfc_symbol
*sym
)
15326 /* Check if the current procedure is implicit_pure. Walk up
15327 the procedure list until we find a procedure. */
15328 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
15330 sym
= ns
->proc_name
;
15334 if (sym
->attr
.flavor
== FL_PROCEDURE
)
15339 return sym
->attr
.flavor
== FL_PROCEDURE
&& sym
->attr
.implicit_pure
15340 && !sym
->attr
.pure
;
15345 gfc_unset_implicit_pure (gfc_symbol
*sym
)
15351 /* Check if the current procedure is implicit_pure. Walk up
15352 the procedure list until we find a procedure. */
15353 for (ns
= gfc_current_ns
; ns
; ns
= ns
->parent
)
15355 sym
= ns
->proc_name
;
15359 if (sym
->attr
.flavor
== FL_PROCEDURE
)
15364 if (sym
->attr
.flavor
== FL_PROCEDURE
)
15365 sym
->attr
.implicit_pure
= 0;
15367 sym
->attr
.pure
= 0;
15371 /* Test whether the current procedure is elemental or not. */
15374 gfc_elemental (gfc_symbol
*sym
)
15376 symbol_attribute attr
;
15379 sym
= gfc_current_ns
->proc_name
;
15384 return attr
.flavor
== FL_PROCEDURE
&& attr
.elemental
;
15388 /* Warn about unused labels. */
15391 warn_unused_fortran_label (gfc_st_label
*label
)
15396 warn_unused_fortran_label (label
->left
);
15398 if (label
->defined
== ST_LABEL_UNKNOWN
)
15401 switch (label
->referenced
)
15403 case ST_LABEL_UNKNOWN
:
15404 gfc_warning (OPT_Wunused_label
, "Label %d at %L defined but not used",
15405 label
->value
, &label
->where
);
15408 case ST_LABEL_BAD_TARGET
:
15409 gfc_warning (OPT_Wunused_label
,
15410 "Label %d at %L defined but cannot be used",
15411 label
->value
, &label
->where
);
15418 warn_unused_fortran_label (label
->right
);
15422 /* Returns the sequence type of a symbol or sequence. */
15425 sequence_type (gfc_typespec ts
)
15434 if (ts
.u
.derived
->components
== NULL
)
15435 return SEQ_NONDEFAULT
;
15437 result
= sequence_type (ts
.u
.derived
->components
->ts
);
15438 for (c
= ts
.u
.derived
->components
->next
; c
; c
= c
->next
)
15439 if (sequence_type (c
->ts
) != result
)
15445 if (ts
.kind
!= gfc_default_character_kind
)
15446 return SEQ_NONDEFAULT
;
15448 return SEQ_CHARACTER
;
15451 if (ts
.kind
!= gfc_default_integer_kind
)
15452 return SEQ_NONDEFAULT
;
15454 return SEQ_NUMERIC
;
15457 if (!(ts
.kind
== gfc_default_real_kind
15458 || ts
.kind
== gfc_default_double_kind
))
15459 return SEQ_NONDEFAULT
;
15461 return SEQ_NUMERIC
;
15464 if (ts
.kind
!= gfc_default_complex_kind
)
15465 return SEQ_NONDEFAULT
;
15467 return SEQ_NUMERIC
;
15470 if (ts
.kind
!= gfc_default_logical_kind
)
15471 return SEQ_NONDEFAULT
;
15473 return SEQ_NUMERIC
;
15476 return SEQ_NONDEFAULT
;
15481 /* Resolve derived type EQUIVALENCE object. */
15484 resolve_equivalence_derived (gfc_symbol
*derived
, gfc_symbol
*sym
, gfc_expr
*e
)
15486 gfc_component
*c
= derived
->components
;
15491 /* Shall not be an object of nonsequence derived type. */
15492 if (!derived
->attr
.sequence
)
15494 gfc_error ("Derived type variable %qs at %L must have SEQUENCE "
15495 "attribute to be an EQUIVALENCE object", sym
->name
,
15500 /* Shall not have allocatable components. */
15501 if (derived
->attr
.alloc_comp
)
15503 gfc_error ("Derived type variable %qs at %L cannot have ALLOCATABLE "
15504 "components to be an EQUIVALENCE object",sym
->name
,
15509 if (sym
->attr
.in_common
&& gfc_has_default_initializer (sym
->ts
.u
.derived
))
15511 gfc_error ("Derived type variable %qs at %L with default "
15512 "initialization cannot be in EQUIVALENCE with a variable "
15513 "in COMMON", sym
->name
, &e
->where
);
15517 for (; c
; c
= c
->next
)
15519 if (gfc_bt_struct (c
->ts
.type
)
15520 && (!resolve_equivalence_derived(c
->ts
.u
.derived
, sym
, e
)))
15523 /* Shall not be an object of sequence derived type containing a pointer
15524 in the structure. */
15525 if (c
->attr
.pointer
)
15527 gfc_error ("Derived type variable %qs at %L with pointer "
15528 "component(s) cannot be an EQUIVALENCE object",
15529 sym
->name
, &e
->where
);
15537 /* Resolve equivalence object.
15538 An EQUIVALENCE object shall not be a dummy argument, a pointer, a target,
15539 an allocatable array, an object of nonsequence derived type, an object of
15540 sequence derived type containing a pointer at any level of component
15541 selection, an automatic object, a function name, an entry name, a result
15542 name, a named constant, a structure component, or a subobject of any of
15543 the preceding objects. A substring shall not have length zero. A
15544 derived type shall not have components with default initialization nor
15545 shall two objects of an equivalence group be initialized.
15546 Either all or none of the objects shall have an protected attribute.
15547 The simple constraints are done in symbol.c(check_conflict) and the rest
15548 are implemented here. */
15551 resolve_equivalence (gfc_equiv
*eq
)
15554 gfc_symbol
*first_sym
;
15557 locus
*last_where
= NULL
;
15558 seq_type eq_type
, last_eq_type
;
15559 gfc_typespec
*last_ts
;
15560 int object
, cnt_protected
;
15563 last_ts
= &eq
->expr
->symtree
->n
.sym
->ts
;
15565 first_sym
= eq
->expr
->symtree
->n
.sym
;
15569 for (object
= 1; eq
; eq
= eq
->eq
, object
++)
15573 e
->ts
= e
->symtree
->n
.sym
->ts
;
15574 /* match_varspec might not know yet if it is seeing
15575 array reference or substring reference, as it doesn't
15577 if (e
->ref
&& e
->ref
->type
== REF_ARRAY
)
15579 gfc_ref
*ref
= e
->ref
;
15580 sym
= e
->symtree
->n
.sym
;
15582 if (sym
->attr
.dimension
)
15584 ref
->u
.ar
.as
= sym
->as
;
15588 /* For substrings, convert REF_ARRAY into REF_SUBSTRING. */
15589 if (e
->ts
.type
== BT_CHARACTER
15591 && ref
->type
== REF_ARRAY
15592 && ref
->u
.ar
.dimen
== 1
15593 && ref
->u
.ar
.dimen_type
[0] == DIMEN_RANGE
15594 && ref
->u
.ar
.stride
[0] == NULL
)
15596 gfc_expr
*start
= ref
->u
.ar
.start
[0];
15597 gfc_expr
*end
= ref
->u
.ar
.end
[0];
15600 /* Optimize away the (:) reference. */
15601 if (start
== NULL
&& end
== NULL
)
15604 e
->ref
= ref
->next
;
15606 e
->ref
->next
= ref
->next
;
15611 ref
->type
= REF_SUBSTRING
;
15613 start
= gfc_get_int_expr (gfc_default_integer_kind
,
15615 ref
->u
.ss
.start
= start
;
15616 if (end
== NULL
&& e
->ts
.u
.cl
)
15617 end
= gfc_copy_expr (e
->ts
.u
.cl
->length
);
15618 ref
->u
.ss
.end
= end
;
15619 ref
->u
.ss
.length
= e
->ts
.u
.cl
;
15626 /* Any further ref is an error. */
15629 gcc_assert (ref
->type
== REF_ARRAY
);
15630 gfc_error ("Syntax error in EQUIVALENCE statement at %L",
15636 if (!gfc_resolve_expr (e
))
15639 sym
= e
->symtree
->n
.sym
;
15641 if (sym
->attr
.is_protected
)
15643 if (cnt_protected
> 0 && cnt_protected
!= object
)
15645 gfc_error ("Either all or none of the objects in the "
15646 "EQUIVALENCE set at %L shall have the "
15647 "PROTECTED attribute",
15652 /* Shall not equivalence common block variables in a PURE procedure. */
15653 if (sym
->ns
->proc_name
15654 && sym
->ns
->proc_name
->attr
.pure
15655 && sym
->attr
.in_common
)
15657 gfc_error ("Common block member %qs at %L cannot be an EQUIVALENCE "
15658 "object in the pure procedure %qs",
15659 sym
->name
, &e
->where
, sym
->ns
->proc_name
->name
);
15663 /* Shall not be a named constant. */
15664 if (e
->expr_type
== EXPR_CONSTANT
)
15666 gfc_error ("Named constant %qs at %L cannot be an EQUIVALENCE "
15667 "object", sym
->name
, &e
->where
);
15671 if (e
->ts
.type
== BT_DERIVED
15672 && !resolve_equivalence_derived (e
->ts
.u
.derived
, sym
, e
))
15675 /* Check that the types correspond correctly:
15677 A numeric sequence structure may be equivalenced to another sequence
15678 structure, an object of default integer type, default real type, double
15679 precision real type, default logical type such that components of the
15680 structure ultimately only become associated to objects of the same
15681 kind. A character sequence structure may be equivalenced to an object
15682 of default character kind or another character sequence structure.
15683 Other objects may be equivalenced only to objects of the same type and
15684 kind parameters. */
15686 /* Identical types are unconditionally OK. */
15687 if (object
== 1 || gfc_compare_types (last_ts
, &sym
->ts
))
15688 goto identical_types
;
15690 last_eq_type
= sequence_type (*last_ts
);
15691 eq_type
= sequence_type (sym
->ts
);
15693 /* Since the pair of objects is not of the same type, mixed or
15694 non-default sequences can be rejected. */
15696 msg
= "Sequence %s with mixed components in EQUIVALENCE "
15697 "statement at %L with different type objects";
15699 && last_eq_type
== SEQ_MIXED
15700 && !gfc_notify_std (GFC_STD_GNU
, msg
, first_sym
->name
, last_where
))
15701 || (eq_type
== SEQ_MIXED
15702 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
)))
15705 msg
= "Non-default type object or sequence %s in EQUIVALENCE "
15706 "statement at %L with objects of different type";
15708 && last_eq_type
== SEQ_NONDEFAULT
15709 && !gfc_notify_std (GFC_STD_GNU
, msg
, first_sym
->name
, last_where
))
15710 || (eq_type
== SEQ_NONDEFAULT
15711 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
)))
15714 msg
="Non-CHARACTER object %qs in default CHARACTER "
15715 "EQUIVALENCE statement at %L";
15716 if (last_eq_type
== SEQ_CHARACTER
15717 && eq_type
!= SEQ_CHARACTER
15718 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
))
15721 msg
="Non-NUMERIC object %qs in default NUMERIC "
15722 "EQUIVALENCE statement at %L";
15723 if (last_eq_type
== SEQ_NUMERIC
15724 && eq_type
!= SEQ_NUMERIC
15725 && !gfc_notify_std (GFC_STD_GNU
, msg
, sym
->name
, &e
->where
))
15730 last_where
= &e
->where
;
15735 /* Shall not be an automatic array. */
15736 if (e
->ref
->type
== REF_ARRAY
15737 && !gfc_resolve_array_spec (e
->ref
->u
.ar
.as
, 1))
15739 gfc_error ("Array %qs at %L with non-constant bounds cannot be "
15740 "an EQUIVALENCE object", sym
->name
, &e
->where
);
15747 /* Shall not be a structure component. */
15748 if (r
->type
== REF_COMPONENT
)
15750 gfc_error ("Structure component %qs at %L cannot be an "
15751 "EQUIVALENCE object",
15752 r
->u
.c
.component
->name
, &e
->where
);
15756 /* A substring shall not have length zero. */
15757 if (r
->type
== REF_SUBSTRING
)
15759 if (compare_bound (r
->u
.ss
.start
, r
->u
.ss
.end
) == CMP_GT
)
15761 gfc_error ("Substring at %L has length zero",
15762 &r
->u
.ss
.start
->where
);
15772 /* Function called by resolve_fntype to flag other symbol used in the
15773 length type parameter specification of function resuls. */
15776 flag_fn_result_spec (gfc_expr
*expr
,
15777 gfc_symbol
*sym ATTRIBUTE_UNUSED
,
15778 int *f ATTRIBUTE_UNUSED
)
15783 if (expr
->expr_type
== EXPR_VARIABLE
)
15785 s
= expr
->symtree
->n
.sym
;
15786 for (ns
= s
->ns
; ns
; ns
= ns
->parent
)
15790 if (!s
->fn_result_spec
15791 && s
->attr
.flavor
== FL_PARAMETER
)
15793 /* Function contained in a module.... */
15794 if (ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_MODULE
)
15797 s
->fn_result_spec
= 1;
15798 /* Make sure that this symbol is translated as a module
15800 st
= gfc_get_unique_symtree (ns
);
15804 /* ... which is use associated and called. */
15805 else if (s
->attr
.use_assoc
|| s
->attr
.used_in_submodule
15807 /* External function matched with an interface. */
15810 && s
->ns
->proc_name
->attr
.if_source
== IFSRC_DECL
)
15811 || s
->ns
->proc_name
->attr
.if_source
== IFSRC_IFBODY
)
15812 && s
->ns
->proc_name
->attr
.function
))
15813 s
->fn_result_spec
= 1;
15820 /* Resolve function and ENTRY types, issue diagnostics if needed. */
15823 resolve_fntype (gfc_namespace
*ns
)
15825 gfc_entry_list
*el
;
15828 if (ns
->proc_name
== NULL
|| !ns
->proc_name
->attr
.function
)
15831 /* If there are any entries, ns->proc_name is the entry master
15832 synthetic symbol and ns->entries->sym actual FUNCTION symbol. */
15834 sym
= ns
->entries
->sym
;
15836 sym
= ns
->proc_name
;
15837 if (sym
->result
== sym
15838 && sym
->ts
.type
== BT_UNKNOWN
15839 && !gfc_set_default_type (sym
, 0, NULL
)
15840 && !sym
->attr
.untyped
)
15842 gfc_error ("Function %qs at %L has no IMPLICIT type",
15843 sym
->name
, &sym
->declared_at
);
15844 sym
->attr
.untyped
= 1;
15847 if (sym
->ts
.type
== BT_DERIVED
&& !sym
->ts
.u
.derived
->attr
.use_assoc
15848 && !sym
->attr
.contained
15849 && !gfc_check_symbol_access (sym
->ts
.u
.derived
)
15850 && gfc_check_symbol_access (sym
))
15852 gfc_notify_std (GFC_STD_F2003
, "PUBLIC function %qs at "
15853 "%L of PRIVATE type %qs", sym
->name
,
15854 &sym
->declared_at
, sym
->ts
.u
.derived
->name
);
15858 for (el
= ns
->entries
->next
; el
; el
= el
->next
)
15860 if (el
->sym
->result
== el
->sym
15861 && el
->sym
->ts
.type
== BT_UNKNOWN
15862 && !gfc_set_default_type (el
->sym
, 0, NULL
)
15863 && !el
->sym
->attr
.untyped
)
15865 gfc_error ("ENTRY %qs at %L has no IMPLICIT type",
15866 el
->sym
->name
, &el
->sym
->declared_at
);
15867 el
->sym
->attr
.untyped
= 1;
15871 if (sym
->ts
.type
== BT_CHARACTER
)
15872 gfc_traverse_expr (sym
->ts
.u
.cl
->length
, NULL
, flag_fn_result_spec
, 0);
15876 /* 12.3.2.1.1 Defined operators. */
15879 check_uop_procedure (gfc_symbol
*sym
, locus where
)
15881 gfc_formal_arglist
*formal
;
15883 if (!sym
->attr
.function
)
15885 gfc_error ("User operator procedure %qs at %L must be a FUNCTION",
15886 sym
->name
, &where
);
15890 if (sym
->ts
.type
== BT_CHARACTER
15891 && !((sym
->ts
.u
.cl
&& sym
->ts
.u
.cl
->length
) || sym
->ts
.deferred
)
15892 && !(sym
->result
&& ((sym
->result
->ts
.u
.cl
15893 && sym
->result
->ts
.u
.cl
->length
) || sym
->result
->ts
.deferred
)))
15895 gfc_error ("User operator procedure %qs at %L cannot be assumed "
15896 "character length", sym
->name
, &where
);
15900 formal
= gfc_sym_get_dummy_args (sym
);
15901 if (!formal
|| !formal
->sym
)
15903 gfc_error ("User operator procedure %qs at %L must have at least "
15904 "one argument", sym
->name
, &where
);
15908 if (formal
->sym
->attr
.intent
!= INTENT_IN
)
15910 gfc_error ("First argument of operator interface at %L must be "
15911 "INTENT(IN)", &where
);
15915 if (formal
->sym
->attr
.optional
)
15917 gfc_error ("First argument of operator interface at %L cannot be "
15918 "optional", &where
);
15922 formal
= formal
->next
;
15923 if (!formal
|| !formal
->sym
)
15926 if (formal
->sym
->attr
.intent
!= INTENT_IN
)
15928 gfc_error ("Second argument of operator interface at %L must be "
15929 "INTENT(IN)", &where
);
15933 if (formal
->sym
->attr
.optional
)
15935 gfc_error ("Second argument of operator interface at %L cannot be "
15936 "optional", &where
);
15942 gfc_error ("Operator interface at %L must have, at most, two "
15943 "arguments", &where
);
15951 gfc_resolve_uops (gfc_symtree
*symtree
)
15953 gfc_interface
*itr
;
15955 if (symtree
== NULL
)
15958 gfc_resolve_uops (symtree
->left
);
15959 gfc_resolve_uops (symtree
->right
);
15961 for (itr
= symtree
->n
.uop
->op
; itr
; itr
= itr
->next
)
15962 check_uop_procedure (itr
->sym
, itr
->sym
->declared_at
);
15966 /* Examine all of the expressions associated with a program unit,
15967 assign types to all intermediate expressions, make sure that all
15968 assignments are to compatible types and figure out which names
15969 refer to which functions or subroutines. It doesn't check code
15970 block, which is handled by gfc_resolve_code. */
15973 resolve_types (gfc_namespace
*ns
)
15979 gfc_namespace
* old_ns
= gfc_current_ns
;
15981 if (ns
->types_resolved
)
15984 /* Check that all IMPLICIT types are ok. */
15985 if (!ns
->seen_implicit_none
)
15988 for (letter
= 0; letter
!= GFC_LETTERS
; ++letter
)
15989 if (ns
->set_flag
[letter
]
15990 && !resolve_typespec_used (&ns
->default_type
[letter
],
15991 &ns
->implicit_loc
[letter
], NULL
))
15995 gfc_current_ns
= ns
;
15997 resolve_entries (ns
);
15999 resolve_common_vars (&ns
->blank_common
, false);
16000 resolve_common_blocks (ns
->common_root
);
16002 resolve_contained_functions (ns
);
16004 if (ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_PROCEDURE
16005 && ns
->proc_name
->attr
.if_source
== IFSRC_IFBODY
)
16006 resolve_formal_arglist (ns
->proc_name
);
16008 gfc_traverse_ns (ns
, resolve_bind_c_derived_types
);
16010 for (cl
= ns
->cl_list
; cl
; cl
= cl
->next
)
16011 resolve_charlen (cl
);
16013 gfc_traverse_ns (ns
, resolve_symbol
);
16015 resolve_fntype (ns
);
16017 for (n
= ns
->contained
; n
; n
= n
->sibling
)
16019 if (gfc_pure (ns
->proc_name
) && !gfc_pure (n
->proc_name
))
16020 gfc_error ("Contained procedure %qs at %L of a PURE procedure must "
16021 "also be PURE", n
->proc_name
->name
,
16022 &n
->proc_name
->declared_at
);
16028 gfc_do_concurrent_flag
= 0;
16029 gfc_check_interfaces (ns
);
16031 gfc_traverse_ns (ns
, resolve_values
);
16037 for (d
= ns
->data
; d
; d
= d
->next
)
16041 gfc_traverse_ns (ns
, gfc_formalize_init_value
);
16043 gfc_traverse_ns (ns
, gfc_verify_binding_labels
);
16045 for (eq
= ns
->equiv
; eq
; eq
= eq
->next
)
16046 resolve_equivalence (eq
);
16048 /* Warn about unused labels. */
16049 if (warn_unused_label
)
16050 warn_unused_fortran_label (ns
->st_labels
);
16052 gfc_resolve_uops (ns
->uop_root
);
16054 gfc_traverse_ns (ns
, gfc_verify_DTIO_procedures
);
16056 gfc_resolve_omp_declare_simd (ns
);
16058 gfc_resolve_omp_udrs (ns
->omp_udr_root
);
16060 ns
->types_resolved
= 1;
16062 gfc_current_ns
= old_ns
;
16066 /* Call gfc_resolve_code recursively. */
16069 resolve_codes (gfc_namespace
*ns
)
16072 bitmap_obstack old_obstack
;
16074 if (ns
->resolved
== 1)
16077 for (n
= ns
->contained
; n
; n
= n
->sibling
)
16080 gfc_current_ns
= ns
;
16082 /* Don't clear 'cs_base' if this is the namespace of a BLOCK construct. */
16083 if (!(ns
->proc_name
&& ns
->proc_name
->attr
.flavor
== FL_LABEL
))
16086 /* Set to an out of range value. */
16087 current_entry_id
= -1;
16089 old_obstack
= labels_obstack
;
16090 bitmap_obstack_initialize (&labels_obstack
);
16092 gfc_resolve_oacc_declare (ns
);
16093 gfc_resolve_code (ns
->code
, ns
);
16095 bitmap_obstack_release (&labels_obstack
);
16096 labels_obstack
= old_obstack
;
16100 /* This function is called after a complete program unit has been compiled.
16101 Its purpose is to examine all of the expressions associated with a program
16102 unit, assign types to all intermediate expressions, make sure that all
16103 assignments are to compatible types and figure out which names refer to
16104 which functions or subroutines. */
16107 gfc_resolve (gfc_namespace
*ns
)
16109 gfc_namespace
*old_ns
;
16110 code_stack
*old_cs_base
;
16111 struct gfc_omp_saved_state old_omp_state
;
16117 old_ns
= gfc_current_ns
;
16118 old_cs_base
= cs_base
;
16120 /* As gfc_resolve can be called during resolution of an OpenMP construct
16121 body, we should clear any state associated to it, so that say NS's
16122 DO loops are not interpreted as OpenMP loops. */
16123 if (!ns
->construct_entities
)
16124 gfc_omp_save_and_clear_state (&old_omp_state
);
16126 resolve_types (ns
);
16127 component_assignment_level
= 0;
16128 resolve_codes (ns
);
16130 gfc_current_ns
= old_ns
;
16131 cs_base
= old_cs_base
;
16134 gfc_run_passes (ns
);
16136 if (!ns
->construct_entities
)
16137 gfc_omp_restore_state (&old_omp_state
);