1 /* Process declarations and variables for C++ compiler.
2 Copyright (C) 1988, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
3 1999, 2000, 2001, 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
4 Hacked by Michael Tiemann (tiemann@cygnus.com)
6 This file is part of GCC.
8 GCC is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2, or (at your option)
13 GCC is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING. If not, write to
20 the Free Software Foundation, 59 Temple Place - Suite 330,
21 Boston, MA 02111-1307, USA. */
24 /* Process declarations and symbol lookup for C++ front end.
25 Also constructs types; the standard scalar types at initialization,
26 and structure, union, array and enum types when they are declared. */
28 /* ??? not all decl nodes are given the most useful possible
29 line numbers. For example, the CONST_DECLs for enum values. */
33 #include "coretypes.h"
48 #include "tree-mudflap.h"
50 #include "tree-inline.h"
53 extern cpp_reader
*parse_in
;
55 /* This structure contains information about the initializations
56 and/or destructions required for a particular priority level. */
57 typedef struct priority_info_s
{
58 /* Nonzero if there have been any initializations at this priority
59 throughout the translation unit. */
60 int initializations_p
;
61 /* Nonzero if there have been any destructions at this priority
62 throughout the translation unit. */
66 static void mark_vtable_entries (tree
);
67 static bool maybe_emit_vtables (tree
);
68 static bool acceptable_java_type (tree
);
69 static tree
start_objects (int, int);
70 static void finish_objects (int, int, tree
);
71 static tree
start_static_storage_duration_function (unsigned);
72 static void finish_static_storage_duration_function (tree
);
73 static priority_info
get_priority_info (int);
74 static void do_static_initialization (tree
, tree
);
75 static void do_static_destruction (tree
);
76 static tree
start_static_initialization_or_destruction (tree
, int);
77 static void finish_static_initialization_or_destruction (tree
);
78 static void generate_ctor_or_dtor_function (bool, int, location_t
*);
79 static int generate_ctor_and_dtor_functions_for_priority (splay_tree_node
,
81 static tree
prune_vars_needing_no_initialization (tree
*);
82 static void write_out_vars (tree
);
83 static void import_export_class (tree
);
84 static tree
get_guard_bits (tree
);
86 /* A list of static class variables. This is needed, because a
87 static class variable can be declared inside the class without
88 an initializer, and then initialized, statically, outside the class. */
89 static GTY(()) varray_type pending_statics
;
90 #define pending_statics_used \
91 (pending_statics ? pending_statics->elements_used : 0)
93 /* A list of functions which were declared inline, but which we
94 may need to emit outline anyway. */
95 static GTY(()) varray_type deferred_fns
;
96 #define deferred_fns_used \
97 (deferred_fns ? deferred_fns->elements_used : 0)
99 /* Flag used when debugging spew.c */
101 extern int spew_debug
;
103 /* Nonzero if we're done parsing and into end-of-file activities. */
107 /* Functions called along with real static constructors and destructors. */
113 /* Incorporate `const' and `volatile' qualifiers for member functions.
114 FUNCTION is a TYPE_DECL or a FUNCTION_DECL.
115 QUALS is a list of qualifiers. Returns any explicit
116 top-level qualifiers of the method's this pointer, anything other than
117 TYPE_UNQUALIFIED will be an extension. */
120 grok_method_quals (tree ctype
, tree function
, cp_cv_quals quals
)
122 tree fntype
= TREE_TYPE (function
);
123 tree raises
= TYPE_RAISES_EXCEPTIONS (fntype
);
124 int type_quals
= TYPE_UNQUALIFIED
;
125 int this_quals
= TYPE_UNQUALIFIED
;
127 type_quals
= quals
& ~TYPE_QUAL_RESTRICT
;
128 this_quals
= quals
& TYPE_QUAL_RESTRICT
;
130 ctype
= cp_build_qualified_type (ctype
, type_quals
);
131 fntype
= build_method_type_directly (ctype
, TREE_TYPE (fntype
),
132 (TREE_CODE (fntype
) == METHOD_TYPE
133 ? TREE_CHAIN (TYPE_ARG_TYPES (fntype
))
134 : TYPE_ARG_TYPES (fntype
)));
136 fntype
= build_exception_variant (fntype
, raises
);
138 TREE_TYPE (function
) = fntype
;
142 /* Build a PARM_DECL with NAME and TYPE, and set DECL_ARG_TYPE
146 cp_build_parm_decl (tree name
, tree type
)
148 tree parm
= build_decl (PARM_DECL
, name
, type
);
149 /* DECL_ARG_TYPE is only used by the back end and the back end never
151 if (!processing_template_decl
)
152 DECL_ARG_TYPE (parm
) = type_passed_as (type
);
156 /* Returns a PARM_DECL for a parameter of the indicated TYPE, with the
160 build_artificial_parm (tree name
, tree type
)
162 tree parm
= cp_build_parm_decl (name
, type
);
163 DECL_ARTIFICIAL (parm
) = 1;
164 /* All our artificial parms are implicitly `const'; they cannot be
166 TREE_READONLY (parm
) = 1;
170 /* Constructors for types with virtual baseclasses need an "in-charge" flag
171 saying whether this constructor is responsible for initialization of
172 virtual baseclasses or not. All destructors also need this "in-charge"
173 flag, which additionally determines whether or not the destructor should
174 free the memory for the object.
176 This function adds the "in-charge" flag to member function FN if
177 appropriate. It is called from grokclassfn and tsubst.
178 FN must be either a constructor or destructor.
180 The in-charge flag follows the 'this' parameter, and is followed by the
181 VTT parm (if any), then the user-written parms. */
184 maybe_retrofit_in_chrg (tree fn
)
186 tree basetype
, arg_types
, parms
, parm
, fntype
;
188 /* If we've already add the in-charge parameter don't do it again. */
189 if (DECL_HAS_IN_CHARGE_PARM_P (fn
))
192 /* When processing templates we can't know, in general, whether or
193 not we're going to have virtual baseclasses. */
194 if (processing_template_decl
)
197 /* We don't need an in-charge parameter for constructors that don't
198 have virtual bases. */
199 if (DECL_CONSTRUCTOR_P (fn
)
200 && !CLASSTYPE_VBASECLASSES (DECL_CONTEXT (fn
)))
203 arg_types
= TYPE_ARG_TYPES (TREE_TYPE (fn
));
204 basetype
= TREE_TYPE (TREE_VALUE (arg_types
));
205 arg_types
= TREE_CHAIN (arg_types
);
207 parms
= TREE_CHAIN (DECL_ARGUMENTS (fn
));
209 /* If this is a subobject constructor or destructor, our caller will
210 pass us a pointer to our VTT. */
211 if (CLASSTYPE_VBASECLASSES (DECL_CONTEXT (fn
)))
213 parm
= build_artificial_parm (vtt_parm_identifier
, vtt_parm_type
);
215 /* First add it to DECL_ARGUMENTS between 'this' and the real args... */
216 TREE_CHAIN (parm
) = parms
;
219 /* ...and then to TYPE_ARG_TYPES. */
220 arg_types
= hash_tree_chain (vtt_parm_type
, arg_types
);
222 DECL_HAS_VTT_PARM_P (fn
) = 1;
225 /* Then add the in-charge parm (before the VTT parm). */
226 parm
= build_artificial_parm (in_charge_identifier
, integer_type_node
);
227 TREE_CHAIN (parm
) = parms
;
229 arg_types
= hash_tree_chain (integer_type_node
, arg_types
);
231 /* Insert our new parameter(s) into the list. */
232 TREE_CHAIN (DECL_ARGUMENTS (fn
)) = parms
;
234 /* And rebuild the function type. */
235 fntype
= build_method_type_directly (basetype
, TREE_TYPE (TREE_TYPE (fn
)),
237 if (TYPE_RAISES_EXCEPTIONS (TREE_TYPE (fn
)))
238 fntype
= build_exception_variant (fntype
,
239 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (fn
)));
240 TREE_TYPE (fn
) = fntype
;
242 /* Now we've got the in-charge parameter. */
243 DECL_HAS_IN_CHARGE_PARM_P (fn
) = 1;
246 /* Classes overload their constituent function names automatically.
247 When a function name is declared in a record structure,
248 its name is changed to it overloaded name. Since names for
249 constructors and destructors can conflict, we place a leading
252 CNAME is the name of the class we are grokking for.
254 FUNCTION is a FUNCTION_DECL. It was created by `grokdeclarator'.
256 FLAGS contains bits saying what's special about today's
257 arguments. 1 == DESTRUCTOR. 2 == OPERATOR.
259 If FUNCTION is a destructor, then we must add the `auto-delete' field
260 as a second parameter. There is some hair associated with the fact
261 that we must "declare" this variable in the manner consistent with the
262 way the rest of the arguments were declared.
264 QUALS are the qualifiers for the this pointer. */
267 grokclassfn (tree ctype
, tree function
, enum overload_flags flags
,
270 tree fn_name
= DECL_NAME (function
);
271 cp_cv_quals this_quals
= TYPE_UNQUALIFIED
;
273 /* Even within an `extern "C"' block, members get C++ linkage. See
274 [dcl.link] for details. */
275 SET_DECL_LANGUAGE (function
, lang_cplusplus
);
277 if (fn_name
== NULL_TREE
)
279 error ("name missing for member function");
280 fn_name
= get_identifier ("<anonymous>");
281 DECL_NAME (function
) = fn_name
;
285 this_quals
= grok_method_quals (ctype
, function
, quals
);
287 if (TREE_CODE (TREE_TYPE (function
)) == METHOD_TYPE
)
289 /* Must add the class instance variable up front. */
290 /* Right now we just make this a pointer. But later
291 we may wish to make it special. */
292 tree type
= TREE_VALUE (TYPE_ARG_TYPES (TREE_TYPE (function
)));
296 /* The `this' parameter is implicitly `const'; it cannot be
298 this_quals
|= TYPE_QUAL_CONST
;
299 qual_type
= cp_build_qualified_type (type
, this_quals
);
300 parm
= build_artificial_parm (this_identifier
, qual_type
);
301 cp_apply_type_quals_to_decl (this_quals
, parm
);
302 TREE_CHAIN (parm
) = DECL_ARGUMENTS (function
);
303 DECL_ARGUMENTS (function
) = parm
;
306 DECL_CONTEXT (function
) = ctype
;
308 if (flags
== DTOR_FLAG
)
309 DECL_DESTRUCTOR_P (function
) = 1;
311 if (flags
== DTOR_FLAG
|| DECL_CONSTRUCTOR_P (function
))
312 maybe_retrofit_in_chrg (function
);
315 /* Create an ARRAY_REF, checking for the user doing things backwards
319 grok_array_decl (tree array_expr
, tree index_exp
)
323 tree orig_array_expr
= array_expr
;
324 tree orig_index_exp
= index_exp
;
326 if (error_operand_p (array_expr
) || error_operand_p (index_exp
))
327 return error_mark_node
;
329 if (processing_template_decl
)
331 if (type_dependent_expression_p (array_expr
)
332 || type_dependent_expression_p (index_exp
))
333 return build_min_nt (ARRAY_REF
, array_expr
, index_exp
,
334 NULL_TREE
, NULL_TREE
);
335 array_expr
= build_non_dependent_expr (array_expr
);
336 index_exp
= build_non_dependent_expr (index_exp
);
339 type
= TREE_TYPE (array_expr
);
341 type
= non_reference (type
);
343 /* If they have an `operator[]', use that. */
344 if (IS_AGGR_TYPE (type
) || IS_AGGR_TYPE (TREE_TYPE (index_exp
)))
345 expr
= build_new_op (ARRAY_REF
, LOOKUP_NORMAL
,
346 array_expr
, index_exp
, NULL_TREE
,
347 /*overloaded_p=*/NULL
);
352 /* Otherwise, create an ARRAY_REF for a pointer or array type.
353 It is a little-known fact that, if `a' is an array and `i' is
354 an int, you can write `i[a]', which means the same thing as
356 if (TREE_CODE (type
) == ARRAY_TYPE
)
359 p1
= build_expr_type_conversion (WANT_POINTER
, array_expr
, false);
361 if (TREE_CODE (TREE_TYPE (index_exp
)) == ARRAY_TYPE
)
364 p2
= build_expr_type_conversion (WANT_POINTER
, index_exp
, false);
366 i1
= build_expr_type_conversion (WANT_INT
| WANT_ENUM
, array_expr
,
368 i2
= build_expr_type_conversion (WANT_INT
| WANT_ENUM
, index_exp
,
371 if ((p1
&& i2
) && (i1
&& p2
))
372 error ("ambiguous conversion for array subscript");
375 array_expr
= p1
, index_exp
= i2
;
377 array_expr
= p2
, index_exp
= i1
;
380 error ("invalid types %<%T[%T]%> for array subscript",
381 type
, TREE_TYPE (index_exp
));
382 return error_mark_node
;
385 if (array_expr
== error_mark_node
|| index_exp
== error_mark_node
)
386 error ("ambiguous conversion for array subscript");
388 expr
= build_array_ref (array_expr
, index_exp
);
390 if (processing_template_decl
&& expr
!= error_mark_node
)
391 return build_min_non_dep (ARRAY_REF
, expr
, orig_array_expr
, orig_index_exp
,
392 NULL_TREE
, NULL_TREE
);
396 /* Given the cast expression EXP, checking out its validity. Either return
397 an error_mark_node if there was an unavoidable error, return a cast to
398 void for trying to delete a pointer w/ the value 0, or return the
399 call to delete. If DOING_VEC is true, we handle things differently
400 for doing an array delete.
401 Implements ARM $5.3.4. This is called from the parser. */
404 delete_sanity (tree exp
, tree size
, bool doing_vec
, int use_global_delete
)
408 if (exp
== error_mark_node
)
411 if (processing_template_decl
)
413 t
= build_min (DELETE_EXPR
, void_type_node
, exp
, size
);
414 DELETE_EXPR_USE_GLOBAL (t
) = use_global_delete
;
415 DELETE_EXPR_USE_VEC (t
) = doing_vec
;
416 TREE_SIDE_EFFECTS (t
) = 1;
420 /* An array can't have been allocated by new, so complain. */
421 if (TREE_CODE (exp
) == VAR_DECL
422 && TREE_CODE (TREE_TYPE (exp
)) == ARRAY_TYPE
)
423 warning ("deleting array %q#D", exp
);
425 t
= build_expr_type_conversion (WANT_POINTER
, exp
, true);
427 if (t
== NULL_TREE
|| t
== error_mark_node
)
429 error ("type %q#T argument given to %<delete%>, expected pointer",
431 return error_mark_node
;
434 type
= TREE_TYPE (t
);
436 /* As of Valley Forge, you can delete a pointer to const. */
438 /* You can't delete functions. */
439 if (TREE_CODE (TREE_TYPE (type
)) == FUNCTION_TYPE
)
441 error ("cannot delete a function. Only pointer-to-objects are "
442 "valid arguments to %<delete%>");
443 return error_mark_node
;
446 /* Deleting ptr to void is undefined behavior [expr.delete/3]. */
447 if (TREE_CODE (TREE_TYPE (type
)) == VOID_TYPE
)
449 warning ("deleting %qT is undefined", type
);
453 /* Deleting a pointer with the value zero is valid and has no effect. */
454 if (integer_zerop (t
))
455 return build1 (NOP_EXPR
, void_type_node
, t
);
458 return build_vec_delete (t
, /*maxindex=*/NULL_TREE
,
459 sfk_deleting_destructor
,
462 return build_delete (type
, t
, sfk_deleting_destructor
,
463 LOOKUP_NORMAL
, use_global_delete
);
466 /* Report an error if the indicated template declaration is not the
467 sort of thing that should be a member template. */
470 check_member_template (tree tmpl
)
474 gcc_assert (TREE_CODE (tmpl
) == TEMPLATE_DECL
);
475 decl
= DECL_TEMPLATE_RESULT (tmpl
);
477 if (TREE_CODE (decl
) == FUNCTION_DECL
478 || (TREE_CODE (decl
) == TYPE_DECL
479 && IS_AGGR_TYPE (TREE_TYPE (decl
))))
481 if (current_function_decl
)
482 /* 14.5.2.2 [temp.mem]
484 A local class shall not have member templates. */
485 error ("invalid declaration of member template %q#D in local class",
488 if (TREE_CODE (decl
) == FUNCTION_DECL
&& DECL_VIRTUAL_P (decl
))
490 /* 14.5.2.3 [temp.mem]
492 A member function template shall not be virtual. */
494 ("invalid use of %<virtual%> in template declaration of %q#D",
496 DECL_VIRTUAL_P (decl
) = 0;
499 /* The debug-information generating code doesn't know what to do
500 with member templates. */
501 DECL_IGNORED_P (tmpl
) = 1;
504 error ("template declaration of %q#D", decl
);
507 /* Return true iff TYPE is a valid Java parameter or return type. */
510 acceptable_java_type (tree type
)
512 if (TREE_CODE (type
) == VOID_TYPE
|| TYPE_FOR_JAVA (type
))
514 if (TREE_CODE (type
) == POINTER_TYPE
|| TREE_CODE (type
) == REFERENCE_TYPE
)
516 type
= TREE_TYPE (type
);
517 if (TREE_CODE (type
) == RECORD_TYPE
)
520 if (! TYPE_FOR_JAVA (type
))
522 if (! CLASSTYPE_TEMPLATE_INFO (type
))
524 args
= CLASSTYPE_TI_ARGS (type
);
525 i
= TREE_VEC_LENGTH (args
);
528 type
= TREE_VEC_ELT (args
, i
);
529 if (TREE_CODE (type
) == POINTER_TYPE
)
530 type
= TREE_TYPE (type
);
531 if (! TYPE_FOR_JAVA (type
))
540 /* For a METHOD in a Java class CTYPE, return true if
541 the parameter and return types are valid Java types.
542 Otherwise, print appropriate error messages, and return false. */
545 check_java_method (tree method
)
548 tree arg_types
= TYPE_ARG_TYPES (TREE_TYPE (method
));
549 tree ret_type
= TREE_TYPE (TREE_TYPE (method
));
551 if (!acceptable_java_type (ret_type
))
553 error ("Java method %qD has non-Java return type %qT",
558 arg_types
= TREE_CHAIN (arg_types
);
559 if (DECL_HAS_IN_CHARGE_PARM_P (method
))
560 arg_types
= TREE_CHAIN (arg_types
);
561 if (DECL_HAS_VTT_PARM_P (method
))
562 arg_types
= TREE_CHAIN (arg_types
);
564 for (; arg_types
!= NULL_TREE
; arg_types
= TREE_CHAIN (arg_types
))
566 tree type
= TREE_VALUE (arg_types
);
567 if (!acceptable_java_type (type
))
569 error ("Java method %qD has non-Java parameter type %qT",
577 /* Sanity check: report error if this function FUNCTION is not
578 really a member of the class (CTYPE) it is supposed to belong to.
579 TEMPLATE_PARMS is used to specify the template parameters of a member
580 template passed as FUNCTION_DECL. If the member template is passed as a
581 TEMPLATE_DECL, it can be NULL since the parameters can be extracted
582 from the declaration. If the function is not a function template, it
584 It returns the original declaration for the function, or NULL_TREE
585 if no declaration was found (and an error was emitted). */
588 check_classfn (tree ctype
, tree function
, tree template_parms
)
593 if (DECL_USE_TEMPLATE (function
)
594 && !(TREE_CODE (function
) == TEMPLATE_DECL
595 && DECL_TEMPLATE_SPECIALIZATION (function
))
596 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (function
)))
597 /* Since this is a specialization of a member template,
598 we're not going to find the declaration in the class.
601 struct S { template <typename T> void f(T); };
602 template <> void S::f(int);
604 we're not going to find `S::f(int)', but there's no
605 reason we should, either. We let our callers know we didn't
606 find the method, but we don't complain. */
609 /* Basic sanity check: for a template function, the template parameters
610 either were not passed, or they are the same of DECL_TEMPLATE_PARMS. */
611 if (TREE_CODE (function
) == TEMPLATE_DECL
)
613 gcc_assert (!template_parms
614 || comp_template_parms (template_parms
,
615 DECL_TEMPLATE_PARMS (function
)));
616 template_parms
= DECL_TEMPLATE_PARMS (function
);
619 /* OK, is this a definition of a member template? */
620 is_template
= (template_parms
!= NULL_TREE
);
622 ix
= class_method_index_for_fn (complete_type (ctype
), function
);
625 VEC(tree
) *methods
= CLASSTYPE_METHOD_VEC (ctype
);
626 tree fndecls
, fndecl
= 0;
629 const char *format
= NULL
;
631 pushed_scope
= push_scope (ctype
);
632 for (fndecls
= VEC_index (tree
, methods
, ix
);
633 fndecls
; fndecls
= OVL_NEXT (fndecls
))
637 fndecl
= OVL_CURRENT (fndecls
);
638 p1
= TYPE_ARG_TYPES (TREE_TYPE (function
));
639 p2
= TYPE_ARG_TYPES (TREE_TYPE (fndecl
));
641 /* We cannot simply call decls_match because this doesn't
642 work for static member functions that are pretending to
643 be methods, and because the name may have been changed by
646 /* Get rid of the this parameter on functions that become
648 if (DECL_STATIC_FUNCTION_P (fndecl
)
649 && TREE_CODE (TREE_TYPE (function
)) == METHOD_TYPE
)
650 p1
= TREE_CHAIN (p1
);
652 /* A member template definition only matches a member template
654 if (is_template
!= (TREE_CODE (fndecl
) == TEMPLATE_DECL
))
657 if (same_type_p (TREE_TYPE (TREE_TYPE (function
)),
658 TREE_TYPE (TREE_TYPE (fndecl
)))
659 && compparms (p1
, p2
)
661 || comp_template_parms (template_parms
,
662 DECL_TEMPLATE_PARMS (fndecl
)))
663 && (DECL_TEMPLATE_SPECIALIZATION (function
)
664 == DECL_TEMPLATE_SPECIALIZATION (fndecl
))
665 && (!DECL_TEMPLATE_SPECIALIZATION (function
)
666 || (DECL_TI_TEMPLATE (function
)
667 == DECL_TI_TEMPLATE (fndecl
))))
671 pop_scope (pushed_scope
);
673 return OVL_CURRENT (fndecls
);
674 error ("prototype for %q#D does not match any in class %qT",
676 is_conv_op
= DECL_CONV_FN_P (fndecl
);
679 ix
= CLASSTYPE_FIRST_CONVERSION_SLOT
;
680 fndecls
= VEC_index (tree
, methods
, ix
);
683 fndecl
= OVL_CURRENT (fndecls
);
684 fndecls
= OVL_NEXT (fndecls
);
686 if (!fndecls
&& is_conv_op
)
688 if (VEC_length (tree
, methods
) > (size_t) ++ix
)
690 fndecls
= VEC_index (tree
, methods
, ix
);
691 if (!DECL_CONV_FN_P (OVL_CURRENT (fndecls
)))
703 format
= "candidates are: %#D";
705 format
= "candidate is: %#D";
706 cp_error_at (format
, fndecl
);
709 else if (!COMPLETE_TYPE_P (ctype
))
710 cxx_incomplete_type_error (function
, ctype
);
712 error ("no %q#D member function declared in class %qT",
715 /* If we did not find the method in the class, add it to avoid
716 spurious errors (unless the CTYPE is not yet defined, in which
717 case we'll only confuse ourselves when the function is declared
718 properly within the class. */
719 if (COMPLETE_TYPE_P (ctype
))
720 add_method (ctype
, function
);
724 /* DECL is a function with vague linkage. Remember it so that at the
725 end of the translation unit we can decide whether or not to emit
729 note_vague_linkage_fn (tree decl
)
731 if (!DECL_DEFERRED_FN (decl
))
733 DECL_DEFERRED_FN (decl
) = 1;
734 DECL_DEFER_OUTPUT (decl
) = 1;
736 VARRAY_TREE_INIT (deferred_fns
, 32, "deferred_fns");
737 VARRAY_PUSH_TREE (deferred_fns
, decl
);
741 /* Like note_vague_linkage_fn but for variables. */
744 note_vague_linkage_var (tree var
)
746 if (!pending_statics
)
747 VARRAY_TREE_INIT (pending_statics
, 32, "pending_statics");
748 VARRAY_PUSH_TREE (pending_statics
, var
);
751 /* We have just processed the DECL, which is a static data member.
752 Its initializer, if present, is INIT. The ASMSPEC_TREE, if
753 present, is the assembly-language name for the data member.
754 FLAGS is as for cp_finish_decl. */
757 finish_static_data_member_decl (tree decl
, tree init
, tree asmspec_tree
,
760 gcc_assert (TREE_PUBLIC (decl
));
762 DECL_CONTEXT (decl
) = current_class_type
;
764 /* We cannot call pushdecl here, because that would fill in the
765 TREE_CHAIN of our decl. Instead, we modify cp_finish_decl to do
766 the right thing, namely, to put this decl out straight away. */
767 /* current_class_type can be NULL_TREE in case of error. */
768 if (!asmspec_tree
&& current_class_type
)
769 DECL_INITIAL (decl
) = error_mark_node
;
771 if (! processing_template_decl
)
772 note_vague_linkage_var (decl
);
774 if (LOCAL_CLASS_P (current_class_type
))
775 pedwarn ("local class %q#T shall not have static data member %q#D",
776 current_class_type
, decl
);
778 /* Static consts need not be initialized in the class definition. */
779 if (init
!= NULL_TREE
&& TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl
)))
781 static int explained
= 0;
783 error ("initializer invalid for static member with constructor");
786 error ("(an out of class initialization is required)");
791 /* Force the compiler to know when an uninitialized static const
792 member is being used. */
793 if (CP_TYPE_CONST_P (TREE_TYPE (decl
)) && init
== 0)
794 TREE_USED (decl
) = 1;
795 DECL_INITIAL (decl
) = init
;
796 DECL_IN_AGGR_P (decl
) = 1;
798 cp_finish_decl (decl
, init
, asmspec_tree
, flags
);
801 /* Process the specs, declarator (NULL if omitted) and width (NULL if omitted)
802 of a structure component, returning a _DECL node.
803 QUALS is a list of type qualifiers for this decl (such as for declaring
804 const member functions).
806 This is done during the parsing of the struct declaration.
807 The _DECL nodes are chained together and the lot of them
808 are ultimately passed to `build_struct' to make the RECORD_TYPE node.
810 If class A defines that certain functions in class B are friends, then
811 the way I have set things up, it is B who is interested in permission
812 granted by A. However, it is in A's context that these declarations
813 are parsed. By returning a void_type_node, class A does not attempt
814 to incorporate the declarations of the friends within its structure.
816 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
817 CHANGES TO CODE IN `start_method'. */
820 grokfield (const cp_declarator
*declarator
,
821 cp_decl_specifier_seq
*declspecs
,
822 tree init
, tree asmspec_tree
,
826 const char *asmspec
= 0;
827 int flags
= LOOKUP_ONLYCONVERTING
;
829 if (!declspecs
->any_specifiers_p
830 && declarator
->kind
== cdk_id
831 && declarator
->u
.id
.qualifying_scope
832 && TREE_CODE (declarator
->u
.id
.unqualified_name
) == IDENTIFIER_NODE
)
833 /* Access declaration */
834 return do_class_using_decl (declarator
->u
.id
.qualifying_scope
,
835 declarator
->u
.id
.unqualified_name
);
838 && TREE_CODE (init
) == TREE_LIST
839 && TREE_VALUE (init
) == error_mark_node
840 && TREE_CHAIN (init
) == NULL_TREE
)
843 value
= grokdeclarator (declarator
, declspecs
, FIELD
, init
!= 0, &attrlist
);
844 if (! value
|| error_operand_p (value
))
845 /* friend or constructor went bad. */
846 return error_mark_node
;
848 if (TREE_CODE (value
) == TYPE_DECL
&& init
)
850 error ("typedef %qD is initialized (use __typeof__ instead)", value
);
854 /* Pass friendly classes back. */
855 if (value
== void_type_node
)
858 /* Pass friend decls back. */
859 if ((TREE_CODE (value
) == FUNCTION_DECL
860 || TREE_CODE (value
) == TEMPLATE_DECL
)
861 && DECL_CONTEXT (value
) != current_class_type
)
864 if (DECL_NAME (value
) != NULL_TREE
865 && IDENTIFIER_POINTER (DECL_NAME (value
))[0] == '_'
866 && ! strcmp (IDENTIFIER_POINTER (DECL_NAME (value
)), "_vptr"))
867 error ("member %qD conflicts with virtual function table field name",
870 /* Stash away type declarations. */
871 if (TREE_CODE (value
) == TYPE_DECL
)
873 DECL_NONLOCAL (value
) = 1;
874 DECL_CONTEXT (value
) = current_class_type
;
876 if (processing_template_decl
)
877 value
= push_template_decl (value
);
881 /* Avoid storing attributes in template parameters:
882 tsubst is not ready to handle them. */
883 tree type
= TREE_TYPE (value
);
884 if (TREE_CODE (type
) == TEMPLATE_TYPE_PARM
885 || TREE_CODE (type
) == BOUND_TEMPLATE_TEMPLATE_PARM
)
886 sorry ("applying attributes to template parameters is not implemented");
888 cplus_decl_attributes (&value
, attrlist
, 0);
894 if (DECL_IN_AGGR_P (value
))
896 error ("%qD is already defined in %qT", value
, DECL_CONTEXT (value
));
897 return void_type_node
;
901 asmspec
= TREE_STRING_POINTER (asmspec_tree
);
905 if (TREE_CODE (value
) == FUNCTION_DECL
)
907 /* Initializers for functions are rejected early in the parser.
908 If we get here, it must be a pure specifier for a method. */
909 gcc_assert (TREE_CODE (TREE_TYPE (value
)) == METHOD_TYPE
);
910 gcc_assert (error_operand_p (init
) || integer_zerop (init
));
911 DECL_PURE_VIRTUAL_P (value
) = 1;
913 else if (pedantic
&& TREE_CODE (value
) != VAR_DECL
)
914 /* Already complained in grokdeclarator. */
918 /* We allow initializers to become parameters to base
920 if (TREE_CODE (init
) == TREE_LIST
)
922 if (TREE_CHAIN (init
) == NULL_TREE
)
923 init
= TREE_VALUE (init
);
925 init
= digest_init (TREE_TYPE (value
), init
, (tree
*)0);
928 if (!processing_template_decl
)
930 if (TREE_CODE (init
) == CONSTRUCTOR
)
931 init
= digest_init (TREE_TYPE (value
), init
, (tree
*)0);
933 init
= integral_constant_value (init
);
935 if (init
!= error_mark_node
&& ! TREE_CONSTANT (init
))
937 /* We can allow references to things that are effectively
938 static, since references are initialized with the
940 if (TREE_CODE (TREE_TYPE (value
)) != REFERENCE_TYPE
941 || (TREE_STATIC (init
) == 0
942 && (!DECL_P (init
) || DECL_EXTERNAL (init
) == 0)))
944 error ("field initializer is not constant");
945 init
= error_mark_node
;
952 if (processing_template_decl
953 && (TREE_CODE (value
) == VAR_DECL
|| TREE_CODE (value
) == FUNCTION_DECL
))
955 value
= push_template_decl (value
);
956 if (error_operand_p (value
))
957 return error_mark_node
;
961 cplus_decl_attributes (&value
, attrlist
, 0);
963 switch (TREE_CODE (value
))
966 finish_static_data_member_decl (value
, init
, asmspec_tree
,
972 error ("%<asm%> specifiers are not permitted on non-static data members");
973 if (DECL_INITIAL (value
) == error_mark_node
)
974 init
= error_mark_node
;
975 cp_finish_decl (value
, init
, NULL_TREE
, flags
);
976 DECL_INITIAL (value
) = init
;
977 DECL_IN_AGGR_P (value
) = 1;
982 set_user_assembler_name (value
, asmspec
);
983 if (!DECL_FRIEND_P (value
))
984 grok_special_member_properties (value
);
986 cp_finish_decl (value
, init
, asmspec_tree
, flags
);
988 /* Pass friends back this way. */
989 if (DECL_FRIEND_P (value
))
990 return void_type_node
;
992 DECL_IN_AGGR_P (value
) = 1;
1001 /* Like `grokfield', but for bitfields.
1002 WIDTH is non-NULL for bit fields only, and is an INTEGER_CST node. */
1005 grokbitfield (const cp_declarator
*declarator
,
1006 cp_decl_specifier_seq
*declspecs
, tree width
)
1008 tree value
= grokdeclarator (declarator
, declspecs
, BITFIELD
, 0, NULL
);
1010 if (! value
) return NULL_TREE
; /* friends went bad. */
1012 /* Pass friendly classes back. */
1013 if (TREE_CODE (value
) == VOID_TYPE
)
1014 return void_type_node
;
1016 if (TREE_CODE (value
) == TYPE_DECL
)
1018 error ("cannot declare %qD to be a bit-field type", value
);
1022 /* Usually, finish_struct_1 catches bitfields with invalid types.
1023 But, in the case of bitfields with function type, we confuse
1024 ourselves into thinking they are member functions, so we must
1026 if (TREE_CODE (value
) == FUNCTION_DECL
)
1028 error ("cannot declare bit-field %qD with function type",
1033 if (DECL_IN_AGGR_P (value
))
1035 error ("%qD is already defined in the class %qT", value
,
1036 DECL_CONTEXT (value
));
1037 return void_type_node
;
1040 if (TREE_STATIC (value
))
1042 error ("static member %qD cannot be a bit-field", value
);
1045 cp_finish_decl (value
, NULL_TREE
, NULL_TREE
, 0);
1047 if (width
!= error_mark_node
)
1049 constant_expression_warning (width
);
1050 DECL_INITIAL (value
) = width
;
1051 SET_DECL_C_BIT_FIELD (value
);
1054 DECL_IN_AGGR_P (value
) = 1;
1060 cplus_decl_attributes (tree
*decl
, tree attributes
, int flags
)
1062 if (*decl
== NULL_TREE
|| *decl
== void_type_node
)
1065 if (TREE_CODE (*decl
) == TEMPLATE_DECL
)
1066 decl
= &DECL_TEMPLATE_RESULT (*decl
);
1068 decl_attributes (decl
, attributes
, flags
);
1070 if (TREE_CODE (*decl
) == TYPE_DECL
)
1071 SET_IDENTIFIER_TYPE_VALUE (DECL_NAME (*decl
), TREE_TYPE (*decl
));
1074 /* Walks through the namespace- or function-scope anonymous union
1075 OBJECT, with the indicated TYPE, building appropriate ALIAS_DECLs.
1076 Returns one of the fields for use in the mangled name. */
1079 build_anon_union_vars (tree type
, tree object
)
1081 tree main_decl
= NULL_TREE
;
1084 /* Rather than write the code to handle the non-union case,
1085 just give an error. */
1086 if (TREE_CODE (type
) != UNION_TYPE
)
1087 error ("anonymous struct not inside named type");
1089 for (field
= TYPE_FIELDS (type
);
1091 field
= TREE_CHAIN (field
))
1096 if (DECL_ARTIFICIAL (field
))
1098 if (TREE_CODE (field
) != FIELD_DECL
)
1100 cp_pedwarn_at ("%q#D invalid; an anonymous union can only "
1101 "have non-static data members",
1106 if (TREE_PRIVATE (field
))
1107 cp_pedwarn_at ("private member %q#D in anonymous union", field
);
1108 else if (TREE_PROTECTED (field
))
1109 cp_pedwarn_at ("protected member %q#D in anonymous union", field
);
1111 if (processing_template_decl
)
1112 ref
= build_min_nt (COMPONENT_REF
, object
,
1113 DECL_NAME (field
), NULL_TREE
);
1115 ref
= build_class_member_access_expr (object
, field
, NULL_TREE
,
1118 if (DECL_NAME (field
))
1120 decl
= build_decl (ALIAS_DECL
, DECL_NAME (field
), TREE_TYPE (field
));
1121 DECL_INITIAL (decl
) = ref
;
1122 TREE_PUBLIC (decl
) = 0;
1123 TREE_STATIC (decl
) = 0;
1124 DECL_EXTERNAL (decl
) = 1;
1125 decl
= pushdecl (decl
);
1127 else if (ANON_AGGR_TYPE_P (TREE_TYPE (field
)))
1128 decl
= build_anon_union_vars (TREE_TYPE (field
), ref
);
1132 if (main_decl
== NULL_TREE
)
1139 /* Finish off the processing of a UNION_TYPE structure. If the union is an
1140 anonymous union, then all members must be laid out together. PUBLIC_P
1141 is nonzero if this union is not declared static. */
1144 finish_anon_union (tree anon_union_decl
)
1150 if (anon_union_decl
== error_mark_node
)
1153 type
= TREE_TYPE (anon_union_decl
);
1154 public_p
= TREE_PUBLIC (anon_union_decl
);
1156 /* The VAR_DECL's context is the same as the TYPE's context. */
1157 DECL_CONTEXT (anon_union_decl
) = DECL_CONTEXT (TYPE_NAME (type
));
1159 if (TYPE_FIELDS (type
) == NULL_TREE
)
1164 error ("namespace-scope anonymous aggregates must be static");
1168 main_decl
= build_anon_union_vars (type
, anon_union_decl
);
1169 if (main_decl
== NULL_TREE
)
1171 warning ("anonymous union with no members");
1175 if (!processing_template_decl
)
1177 /* Use main_decl to set the mangled name. */
1178 DECL_NAME (anon_union_decl
) = DECL_NAME (main_decl
);
1179 mangle_decl (anon_union_decl
);
1180 DECL_NAME (anon_union_decl
) = NULL_TREE
;
1183 pushdecl (anon_union_decl
);
1184 if (building_stmt_tree ()
1185 && at_function_scope_p ())
1186 add_decl_expr (anon_union_decl
);
1187 else if (!processing_template_decl
)
1188 rest_of_decl_compilation (anon_union_decl
,
1189 toplevel_bindings_p (), at_eof
);
1192 /* Auxiliary functions to make type signatures for
1193 `operator new' and `operator delete' correspond to
1194 what compiler will be expecting. */
1197 coerce_new_type (tree type
)
1200 tree args
= TYPE_ARG_TYPES (type
);
1202 gcc_assert (TREE_CODE (type
) == FUNCTION_TYPE
);
1204 if (!same_type_p (TREE_TYPE (type
), ptr_type_node
))
1207 error ("%<operator new%> must return type %qT", ptr_type_node
);
1210 if (!args
|| args
== void_list_node
1211 || !same_type_p (TREE_VALUE (args
), size_type_node
))
1214 if (args
&& args
!= void_list_node
)
1215 args
= TREE_CHAIN (args
);
1216 pedwarn ("%<operator new%> takes type %<size_t%> (%qT) "
1217 "as first parameter", size_type_node
);
1222 args
= tree_cons (NULL_TREE
, size_type_node
, args
);
1225 type
= build_exception_variant
1226 (build_function_type (ptr_type_node
, args
),
1227 TYPE_RAISES_EXCEPTIONS (type
));
1235 coerce_delete_type (tree type
)
1238 tree args
= TYPE_ARG_TYPES (type
);
1240 gcc_assert (TREE_CODE (type
) == FUNCTION_TYPE
);
1242 if (!same_type_p (TREE_TYPE (type
), void_type_node
))
1245 error ("%<operator delete%> must return type %qT", void_type_node
);
1248 if (!args
|| args
== void_list_node
1249 || !same_type_p (TREE_VALUE (args
), ptr_type_node
))
1252 if (args
&& args
!= void_list_node
)
1253 args
= TREE_CHAIN (args
);
1254 error ("%<operator delete%> takes type %qT as first parameter",
1260 args
= tree_cons (NULL_TREE
, ptr_type_node
, args
);
1263 type
= build_exception_variant
1264 (build_function_type (void_type_node
, args
),
1265 TYPE_RAISES_EXCEPTIONS (type
));
1274 mark_vtable_entries (tree decl
)
1276 tree entries
= CONSTRUCTOR_ELTS (DECL_INITIAL (decl
));
1278 for (; entries
; entries
= TREE_CHAIN (entries
))
1280 tree fnaddr
= TREE_VALUE (entries
);
1283 STRIP_NOPS (fnaddr
);
1285 if (TREE_CODE (fnaddr
) != ADDR_EXPR
1286 && TREE_CODE (fnaddr
) != FDESC_EXPR
)
1287 /* This entry is an offset: a virtual base class offset, a
1288 virtual call offset, an RTTI offset, etc. */
1291 fn
= TREE_OPERAND (fnaddr
, 0);
1292 TREE_ADDRESSABLE (fn
) = 1;
1293 /* When we don't have vcall offsets, we output thunks whenever
1294 we output the vtables that contain them. With vcall offsets,
1295 we know all the thunks we'll need when we emit a virtual
1296 function, so we emit the thunks there instead. */
1297 if (DECL_THUNK_P (fn
))
1298 use_thunk (fn
, /*emit_p=*/0);
1303 /* Set DECL up to have the closest approximation of "initialized common"
1304 linkage available. */
1307 comdat_linkage (tree decl
)
1310 make_decl_one_only (decl
);
1311 else if (TREE_CODE (decl
) == FUNCTION_DECL
1312 || (TREE_CODE (decl
) == VAR_DECL
&& DECL_ARTIFICIAL (decl
)))
1313 /* We can just emit function and compiler-generated variables
1314 statically; having multiple copies is (for the most part) only
1317 There are two correctness issues, however: the address of a
1318 template instantiation with external linkage should be the
1319 same, independent of what translation unit asks for the
1320 address, and this will not hold when we emit multiple copies of
1321 the function. However, there's little else we can do.
1323 Also, by default, the typeinfo implementation assumes that
1324 there will be only one copy of the string used as the name for
1325 each type. Therefore, if weak symbols are unavailable, the
1326 run-time library should perform a more conservative check; it
1327 should perform a string comparison, rather than an address
1329 TREE_PUBLIC (decl
) = 0;
1332 /* Static data member template instantiations, however, cannot
1333 have multiple copies. */
1334 if (DECL_INITIAL (decl
) == 0
1335 || DECL_INITIAL (decl
) == error_mark_node
)
1336 DECL_COMMON (decl
) = 1;
1337 else if (EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl
)))
1339 DECL_COMMON (decl
) = 1;
1340 DECL_INITIAL (decl
) = error_mark_node
;
1342 else if (!DECL_EXPLICIT_INSTANTIATION (decl
))
1344 /* We can't do anything useful; leave vars for explicit
1346 DECL_EXTERNAL (decl
) = 1;
1347 DECL_NOT_REALLY_EXTERN (decl
) = 0;
1351 if (DECL_LANG_SPECIFIC (decl
))
1352 DECL_COMDAT (decl
) = 1;
1355 /* For win32 we also want to put explicit instantiations in
1356 linkonce sections, so that they will be merged with implicit
1357 instantiations; otherwise we get duplicate symbol errors.
1358 For Darwin we do not want explicit instantiations to be
1362 maybe_make_one_only (tree decl
)
1364 /* We used to say that this was not necessary on targets that support weak
1365 symbols, because the implicit instantiations will defer to the explicit
1366 one. However, that's not actually the case in SVR4; a strong definition
1367 after a weak one is an error. Also, not making explicit
1368 instantiations one_only means that we can end up with two copies of
1369 some template instantiations. */
1373 /* We can't set DECL_COMDAT on functions, or cp_finish_file will think
1374 we can get away with not emitting them if they aren't used. We need
1375 to for variables so that cp_finish_decl will update their linkage,
1376 because their DECL_INITIAL may not have been set properly yet. */
1378 if (!TARGET_WEAK_NOT_IN_ARCHIVE_TOC
1379 || (! DECL_EXPLICIT_INSTANTIATION (decl
)
1380 && ! DECL_TEMPLATE_SPECIALIZATION (decl
)))
1382 make_decl_one_only (decl
);
1384 if (TREE_CODE (decl
) == VAR_DECL
)
1386 DECL_COMDAT (decl
) = 1;
1387 /* Mark it needed so we don't forget to emit it. */
1388 mark_decl_referenced (decl
);
1393 /* Determine whether or not we want to specifically import or export CTYPE,
1394 using various heuristics. */
1397 import_export_class (tree ctype
)
1399 /* -1 for imported, 1 for exported. */
1400 int import_export
= 0;
1402 /* It only makes sense to call this function at EOF. The reason is
1403 that this function looks at whether or not the first non-inline
1404 non-abstract virtual member function has been defined in this
1405 translation unit. But, we can't possibly know that until we've
1406 seen the entire translation unit. */
1407 gcc_assert (at_eof
);
1409 if (CLASSTYPE_INTERFACE_KNOWN (ctype
))
1412 /* If MULTIPLE_SYMBOL_SPACES is set and we saw a #pragma interface,
1413 we will have CLASSTYPE_INTERFACE_ONLY set but not
1414 CLASSTYPE_INTERFACE_KNOWN. In that case, we don't want to use this
1415 heuristic because someone will supply a #pragma implementation
1416 elsewhere, and deducing it here would produce a conflict. */
1417 if (CLASSTYPE_INTERFACE_ONLY (ctype
))
1420 if (lookup_attribute ("dllimport", TYPE_ATTRIBUTES (ctype
)))
1422 else if (lookup_attribute ("dllexport", TYPE_ATTRIBUTES (ctype
)))
1424 else if (CLASSTYPE_IMPLICIT_INSTANTIATION (ctype
)
1425 && !flag_implicit_templates
)
1426 /* For a template class, without -fimplicit-templates, check the
1427 repository. If the virtual table is assigned to this
1428 translation unit, then export the class; otherwise, import
1430 import_export
= repo_export_class_p (ctype
) ? 1 : -1;
1431 else if (TYPE_POLYMORPHIC_P (ctype
))
1433 /* The ABI specifies that the virtual table and associated
1434 information are emitted with the key method, if any. */
1435 tree method
= CLASSTYPE_KEY_METHOD (ctype
);
1436 /* If weak symbol support is not available, then we must be
1437 careful not to emit the vtable when the key function is
1438 inline. An inline function can be defined in multiple
1439 translation units. If we were to emit the vtable in each
1440 translation unit containing a definition, we would get
1441 multiple definition errors at link-time. */
1442 if (method
&& (flag_weak
|| ! DECL_DECLARED_INLINE_P (method
)))
1443 import_export
= (DECL_REALLY_EXTERN (method
) ? -1 : 1);
1446 /* When MULTIPLE_SYMBOL_SPACES is set, we cannot count on seeing
1447 a definition anywhere else. */
1448 if (MULTIPLE_SYMBOL_SPACES
&& import_export
== -1)
1451 /* Allow backends the chance to overrule the decision. */
1452 if (targetm
.cxx
.import_export_class
)
1453 import_export
= targetm
.cxx
.import_export_class (ctype
, import_export
);
1457 SET_CLASSTYPE_INTERFACE_KNOWN (ctype
);
1458 CLASSTYPE_INTERFACE_ONLY (ctype
) = (import_export
< 0);
1462 /* Return true if VAR has already been provided to the back end; in that
1463 case VAR should not be modified further by the front end. */
1465 var_finalized_p (tree var
)
1467 return cgraph_varpool_node (var
)->finalized
;
1470 /* DECL is a VAR_DECL or FUNCTION_DECL which, for whatever reason,
1471 must be emitted in this translation unit. Mark it as such. */
1474 mark_needed (tree decl
)
1476 /* It's possible that we no longer need to set
1477 TREE_SYMBOL_REFERENCED here directly, but doing so is
1479 TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl
)) = 1;
1480 mark_decl_referenced (decl
);
1483 /* DECL is either a FUNCTION_DECL or a VAR_DECL. This function
1484 returns true if a definition of this entity should be provided in
1485 this object file. Callers use this function to determine whether
1486 or not to let the back end know that a definition of DECL is
1487 available in this translation unit. */
1490 decl_needed_p (tree decl
)
1492 gcc_assert (TREE_CODE (decl
) == VAR_DECL
1493 || TREE_CODE (decl
) == FUNCTION_DECL
);
1494 /* This function should only be called at the end of the translation
1495 unit. We cannot be sure of whether or not something will be
1496 COMDAT until that point. */
1497 gcc_assert (at_eof
);
1499 /* All entities with external linkage that are not COMDAT should be
1500 emitted; they may be referred to from other object files. */
1501 if (TREE_PUBLIC (decl
) && !DECL_COMDAT (decl
))
1503 /* If this entity was used, let the back-end see it; it will decide
1504 whether or not to emit it into the object file. */
1505 if (TREE_USED (decl
)
1506 || (DECL_ASSEMBLER_NAME_SET_P (decl
)
1507 && TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl
))))
1509 /* Otherwise, DECL does not need to be emitted -- yet. A subsequent
1510 reference to DECL might cause it to be emitted later. */
1514 /* If necessary, write out the vtables for the dynamic class CTYPE.
1515 Returns true if any vtables were emitted. */
1518 maybe_emit_vtables (tree ctype
)
1524 /* If the vtables for this class have already been emitted there is
1525 nothing more to do. */
1526 primary_vtbl
= CLASSTYPE_VTABLES (ctype
);
1527 if (var_finalized_p (primary_vtbl
))
1529 /* Ignore dummy vtables made by get_vtable_decl. */
1530 if (TREE_TYPE (primary_vtbl
) == void_type_node
)
1533 /* On some targets, we cannot determine the key method until the end
1534 of the translation unit -- which is when this function is
1536 if (!targetm
.cxx
.key_method_may_be_inline ())
1537 determine_key_method (ctype
);
1539 /* See if any of the vtables are needed. */
1540 for (vtbl
= CLASSTYPE_VTABLES (ctype
); vtbl
; vtbl
= TREE_CHAIN (vtbl
))
1542 import_export_decl (vtbl
);
1543 if (DECL_NOT_REALLY_EXTERN (vtbl
) && decl_needed_p (vtbl
))
1548 /* If the references to this class' vtables are optimized away,
1549 still emit the appropriate debugging information. See
1551 if (DECL_COMDAT (primary_vtbl
)
1552 && CLASSTYPE_DEBUG_REQUESTED (ctype
))
1553 note_debug_info_needed (ctype
);
1557 /* The ABI requires that we emit all of the vtables if we emit any
1559 for (vtbl
= CLASSTYPE_VTABLES (ctype
); vtbl
; vtbl
= TREE_CHAIN (vtbl
))
1561 /* Mark entities references from the virtual table as used. */
1562 mark_vtable_entries (vtbl
);
1564 if (TREE_TYPE (DECL_INITIAL (vtbl
)) == 0)
1566 tree expr
= store_init_value (vtbl
, DECL_INITIAL (vtbl
));
1568 /* It had better be all done at compile-time. */
1573 DECL_EXTERNAL (vtbl
) = 0;
1574 rest_of_decl_compilation (vtbl
, 1, 1);
1576 /* Because we're only doing syntax-checking, we'll never end up
1577 actually marking the variable as written. */
1578 if (flag_syntax_only
)
1579 TREE_ASM_WRITTEN (vtbl
) = 1;
1582 /* Since we're writing out the vtable here, also write the debug
1584 note_debug_info_needed (ctype
);
1589 /* Like c_determine_visibility, but with additional C++-specific
1593 determine_visibility (tree decl
)
1597 /* Cloned constructors and destructors get the same visibility as
1598 the underlying function. That should be set up in
1599 maybe_clone_body. */
1600 gcc_assert (!DECL_CLONED_FUNCTION_P (decl
));
1602 /* Give the common code a chance to make a determination. */
1603 if (c_determine_visibility (decl
))
1606 /* If DECL is a member of a class, visibility specifiers on the
1607 class can influence the visibility of the DECL. */
1608 if (DECL_CLASS_SCOPE_P (decl
))
1609 class_type
= DECL_CONTEXT (decl
);
1610 else if (TREE_CODE (decl
) == VAR_DECL
1611 && DECL_TINFO_P (decl
)
1612 && CLASS_TYPE_P (TREE_TYPE (DECL_NAME (decl
))))
1613 class_type
= TREE_TYPE (DECL_NAME (decl
));
1616 /* Virtual tables have DECL_CONTEXT set to their associated class,
1617 so they are automatically handled above. */
1618 gcc_assert (TREE_CODE (decl
) != VAR_DECL
1619 || !DECL_VTABLE_OR_VTT_P (decl
));
1620 /* Entities not associated with any class just get the
1621 visibility specified by their attributes. */
1625 /* By default, static data members and function members receive
1626 the visibility of their containing class. */
1629 if (TARGET_DLLIMPORT_DECL_ATTRIBUTES
1630 && lookup_attribute ("dllexport", TYPE_ATTRIBUTES (class_type
)))
1632 DECL_VISIBILITY (decl
) = VISIBILITY_DEFAULT
;
1633 DECL_VISIBILITY_SPECIFIED (decl
) = 1;
1635 else if (TREE_CODE (decl
) == FUNCTION_DECL
1636 && DECL_DECLARED_INLINE_P (decl
)
1637 && visibility_options
.inlines_hidden
)
1639 DECL_VISIBILITY (decl
) = VISIBILITY_HIDDEN
;
1640 DECL_VISIBILITY_SPECIFIED (decl
) = 1;
1642 else if (CLASSTYPE_VISIBILITY_SPECIFIED (class_type
))
1644 DECL_VISIBILITY (decl
) = CLASSTYPE_VISIBILITY (class_type
);
1645 DECL_VISIBILITY_SPECIFIED (decl
) = 1;
1647 /* If no explicit visibility information has been provided for
1648 this class, some targets require that class data be
1650 else if (TREE_CODE (decl
) == VAR_DECL
1651 && targetm
.cxx
.export_class_data ()
1652 && (DECL_TINFO_P (decl
)
1653 || (DECL_VTABLE_OR_VTT_P (decl
)
1654 /* Construction virtual tables are not emitted
1655 because they cannot be referred to from other
1656 object files; their name is not standardized by
1658 && !DECL_CONSTRUCTION_VTABLE_P (decl
))))
1659 DECL_VISIBILITY (decl
) = VISIBILITY_DEFAULT
;
1662 DECL_VISIBILITY (decl
) = CLASSTYPE_VISIBILITY (class_type
);
1663 DECL_VISIBILITY_SPECIFIED (decl
) = 0;
1668 /* DECL is a FUNCTION_DECL or VAR_DECL. If the object file linkage
1669 for DECL has not already been determined, do so now by setting
1670 DECL_EXTERNAL, DECL_COMDAT and other related flags. Until this
1671 function is called entities with vague linkage whose definitions
1672 are available must have TREE_PUBLIC set.
1674 If this function decides to place DECL in COMDAT, it will set
1675 appropriate flags -- but will not clear DECL_EXTERNAL. It is up to
1676 the caller to decide whether or not to clear DECL_EXTERNAL. Some
1677 callers defer that decision until it is clear that DECL is actually
1681 import_export_decl (tree decl
)
1687 if (DECL_INTERFACE_KNOWN (decl
))
1690 /* We cannot determine what linkage to give to an entity with vague
1691 linkage until the end of the file. For example, a virtual table
1692 for a class will be defined if and only if the key method is
1693 defined in this translation unit. As a further example, consider
1694 that when compiling a translation unit that uses PCH file with
1695 "-frepo" it would be incorrect to make decisions about what
1696 entities to emit when building the PCH; those decisions must be
1697 delayed until the repository information has been processed. */
1698 gcc_assert (at_eof
);
1699 /* Object file linkage for explicit instantiations is handled in
1700 mark_decl_instantiated. For static variables in functions with
1701 vague linkage, maybe_commonize_var is used.
1703 Therefore, the only declarations that should be provided to this
1704 function are those with external linkage that are:
1706 * implicit instantiations of function templates
1710 * implicit instantiations of static data members of class
1717 Furthermore, all entities that reach this point must have a
1718 definition available in this translation unit.
1720 The following assertions check these conditions. */
1721 gcc_assert (TREE_CODE (decl
) == FUNCTION_DECL
1722 || TREE_CODE (decl
) == VAR_DECL
);
1723 /* Any code that creates entities with TREE_PUBLIC cleared should
1724 also set DECL_INTERFACE_KNOWN. */
1725 gcc_assert (TREE_PUBLIC (decl
));
1726 if (TREE_CODE (decl
) == FUNCTION_DECL
)
1727 gcc_assert (DECL_IMPLICIT_INSTANTIATION (decl
)
1728 || DECL_FRIEND_PSEUDO_TEMPLATE_INSTANTIATION (decl
)
1729 || DECL_DECLARED_INLINE_P (decl
));
1731 gcc_assert (DECL_IMPLICIT_INSTANTIATION (decl
)
1732 || DECL_VTABLE_OR_VTT_P (decl
)
1733 || DECL_TINFO_P (decl
));
1734 /* Check that a definition of DECL is available in this translation
1736 gcc_assert (!DECL_REALLY_EXTERN (decl
));
1738 /* Assume that DECL will not have COMDAT linkage. */
1740 /* Assume that DECL will not be imported into this translation
1744 /* See if the repository tells us whether or not to emit DECL in
1745 this translation unit. */
1746 emit_p
= repo_emit_p (decl
);
1749 else if (emit_p
== 1)
1751 /* The repository indicates that this entity should be defined
1752 here. Make sure the back end honors that request. */
1753 if (TREE_CODE (decl
) == VAR_DECL
)
1755 else if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl
)
1756 || DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P (decl
))
1759 FOR_EACH_CLONE (clone
, decl
)
1760 mark_needed (clone
);
1764 /* Output the definition as an ordinary strong definition. */
1765 DECL_EXTERNAL (decl
) = 0;
1766 DECL_INTERFACE_KNOWN (decl
) = 1;
1771 /* We have already decided what to do with this DECL; there is no
1772 need to check anything further. */
1774 else if (TREE_CODE (decl
) == VAR_DECL
&& DECL_VTABLE_OR_VTT_P (decl
))
1776 tree type
= DECL_CONTEXT (decl
);
1777 import_export_class (type
);
1778 if (TYPE_FOR_JAVA (type
))
1780 else if (CLASSTYPE_INTERFACE_KNOWN (type
)
1781 && CLASSTYPE_INTERFACE_ONLY (type
))
1783 else if (TARGET_WEAK_NOT_IN_ARCHIVE_TOC
1784 && !CLASSTYPE_USE_TEMPLATE (type
)
1785 && CLASSTYPE_KEY_METHOD (type
)
1786 && !DECL_DECLARED_INLINE_P (CLASSTYPE_KEY_METHOD (type
)))
1787 /* The ABI requires that all virtual tables be emitted with
1788 COMDAT linkage. However, on systems where COMDAT symbols
1789 don't show up in the table of contents for a static
1790 archive, the linker will report errors about undefined
1791 symbols because it will not see the virtual table
1792 definition. Therefore, in the case that we know that the
1793 virtual table will be emitted in only one translation
1794 unit, we make the virtual table an ordinary definition
1795 with external linkage. */
1796 DECL_EXTERNAL (decl
) = 0;
1797 else if (CLASSTYPE_INTERFACE_KNOWN (type
))
1799 /* TYPE is being exported from this translation unit, so DECL
1800 should be defined here. The ABI requires COMDAT
1801 linkage. Normally, we only emit COMDAT things when they
1802 are needed; make sure that we realize that this entity is
1807 else if (!flag_implicit_templates
1808 && CLASSTYPE_IMPLICIT_INSTANTIATION (type
))
1813 else if (TREE_CODE (decl
) == VAR_DECL
&& DECL_TINFO_P (decl
))
1815 tree type
= TREE_TYPE (DECL_NAME (decl
));
1816 if (CLASS_TYPE_P (type
))
1818 import_export_class (type
);
1819 if (CLASSTYPE_INTERFACE_KNOWN (type
)
1820 && TYPE_POLYMORPHIC_P (type
)
1821 && CLASSTYPE_INTERFACE_ONLY (type
)
1822 /* If -fno-rtti was specified, then we cannot be sure
1823 that RTTI information will be emitted with the
1824 virtual table of the class, so we must emit it
1825 wherever it is used. */
1831 if (CLASSTYPE_INTERFACE_KNOWN (type
)
1832 && !CLASSTYPE_INTERFACE_ONLY (type
))
1839 else if (DECL_TEMPLATE_INSTANTIATION (decl
)
1840 || DECL_FRIEND_PSEUDO_TEMPLATE_INSTANTIATION (decl
))
1842 /* DECL is an implicit instantiation of a function or static
1844 if (flag_implicit_templates
1845 || (flag_implicit_inline_templates
1846 && TREE_CODE (decl
) == FUNCTION_DECL
1847 && DECL_DECLARED_INLINE_P (decl
)))
1850 /* If we are not implicitly generating templates, then mark
1851 this entity as undefined in this translation unit. */
1854 else if (DECL_FUNCTION_MEMBER_P (decl
))
1856 if (!DECL_DECLARED_INLINE_P (decl
))
1858 tree ctype
= DECL_CONTEXT (decl
);
1859 import_export_class (ctype
);
1860 if (CLASSTYPE_INTERFACE_KNOWN (ctype
))
1862 DECL_NOT_REALLY_EXTERN (decl
)
1863 = ! (CLASSTYPE_INTERFACE_ONLY (ctype
)
1864 || (DECL_DECLARED_INLINE_P (decl
)
1865 && ! flag_implement_inlines
1866 && !DECL_VINDEX (decl
)));
1868 if (!DECL_NOT_REALLY_EXTERN (decl
))
1869 DECL_EXTERNAL (decl
) = 1;
1871 /* Always make artificials weak. */
1872 if (DECL_ARTIFICIAL (decl
) && flag_weak
)
1875 maybe_make_one_only (decl
);
1886 /* If we are importing DECL into this translation unit, mark is
1887 an undefined here. */
1888 DECL_EXTERNAL (decl
) = 1;
1889 DECL_NOT_REALLY_EXTERN (decl
) = 0;
1893 /* If we decided to put DECL in COMDAT, mark it accordingly at
1895 comdat_linkage (decl
);
1898 DECL_INTERFACE_KNOWN (decl
) = 1;
1901 /* Return an expression that performs the destruction of DECL, which
1902 must be a VAR_DECL whose type has a non-trivial destructor, or is
1903 an array whose (innermost) elements have a non-trivial destructor. */
1906 build_cleanup (tree decl
)
1909 tree type
= TREE_TYPE (decl
);
1911 /* This function should only be called for declarations that really
1912 require cleanups. */
1913 gcc_assert (!TYPE_HAS_TRIVIAL_DESTRUCTOR (type
));
1915 /* Treat all objects with destructors as used; the destructor may do
1916 something substantive. */
1919 if (TREE_CODE (type
) == ARRAY_TYPE
)
1923 cxx_mark_addressable (decl
);
1924 temp
= build1 (ADDR_EXPR
, build_pointer_type (type
), decl
);
1926 temp
= build_delete (TREE_TYPE (temp
), temp
,
1927 sfk_complete_destructor
,
1928 LOOKUP_NORMAL
|LOOKUP_NONVIRTUAL
|LOOKUP_DESTRUCTOR
, 0);
1932 /* Returns the initialization guard variable for the variable DECL,
1933 which has static storage duration. */
1936 get_guard (tree decl
)
1941 sname
= mangle_guard_variable (decl
);
1942 guard
= IDENTIFIER_GLOBAL_VALUE (sname
);
1947 /* We use a type that is big enough to contain a mutex as well
1948 as an integer counter. */
1949 guard_type
= targetm
.cxx
.guard_type ();
1950 guard
= build_decl (VAR_DECL
, sname
, guard_type
);
1952 /* The guard should have the same linkage as what it guards. */
1953 TREE_PUBLIC (guard
) = TREE_PUBLIC (decl
);
1954 TREE_STATIC (guard
) = TREE_STATIC (decl
);
1955 DECL_COMMON (guard
) = DECL_COMMON (decl
);
1956 DECL_ONE_ONLY (guard
) = DECL_ONE_ONLY (decl
);
1957 if (TREE_PUBLIC (decl
))
1958 DECL_WEAK (guard
) = DECL_WEAK (decl
);
1960 DECL_ARTIFICIAL (guard
) = 1;
1961 DECL_IGNORED_P (guard
) = 1;
1962 TREE_USED (guard
) = 1;
1963 pushdecl_top_level_and_finish (guard
, NULL_TREE
);
1968 /* Return those bits of the GUARD variable that should be set when the
1969 guarded entity is actually initialized. */
1972 get_guard_bits (tree guard
)
1974 if (!targetm
.cxx
.guard_mask_bit ())
1976 /* We only set the first byte of the guard, in order to leave room
1977 for a mutex in the high-order bits. */
1978 guard
= build1 (ADDR_EXPR
,
1979 build_pointer_type (TREE_TYPE (guard
)),
1981 guard
= build1 (NOP_EXPR
,
1982 build_pointer_type (char_type_node
),
1984 guard
= build1 (INDIRECT_REF
, char_type_node
, guard
);
1990 /* Return an expression which determines whether or not the GUARD
1991 variable has already been initialized. */
1994 get_guard_cond (tree guard
)
1998 /* Check to see if the GUARD is zero. */
1999 guard
= get_guard_bits (guard
);
2001 /* Mask off all but the low bit. */
2002 if (targetm
.cxx
.guard_mask_bit ())
2004 guard_value
= integer_one_node
;
2005 if (!same_type_p (TREE_TYPE (guard_value
), TREE_TYPE (guard
)))
2006 guard_value
= convert (TREE_TYPE (guard
), guard_value
);
2007 guard
= cp_build_binary_op (BIT_AND_EXPR
, guard
, guard_value
);
2010 guard_value
= integer_zero_node
;
2011 if (!same_type_p (TREE_TYPE (guard_value
), TREE_TYPE (guard
)))
2012 guard_value
= convert (TREE_TYPE (guard
), guard_value
);
2013 return cp_build_binary_op (EQ_EXPR
, guard
, guard_value
);
2016 /* Return an expression which sets the GUARD variable, indicating that
2017 the variable being guarded has been initialized. */
2020 set_guard (tree guard
)
2024 /* Set the GUARD to one. */
2025 guard
= get_guard_bits (guard
);
2026 guard_init
= integer_one_node
;
2027 if (!same_type_p (TREE_TYPE (guard_init
), TREE_TYPE (guard
)))
2028 guard_init
= convert (TREE_TYPE (guard
), guard_init
);
2029 return build_modify_expr (guard
, NOP_EXPR
, guard_init
);
2032 /* Start the process of running a particular set of global constructors
2033 or destructors. Subroutine of do_[cd]tors. */
2036 start_objects (int method_type
, int initp
)
2042 /* Make ctor or dtor function. METHOD_TYPE may be 'I' or 'D'. */
2044 if (initp
!= DEFAULT_INIT_PRIORITY
)
2054 sprintf (type
, "%c%c%.5u", method_type
, joiner
, initp
);
2057 sprintf (type
, "%c", method_type
);
2059 fndecl
= build_lang_decl (FUNCTION_DECL
,
2060 get_file_function_name_long (type
),
2061 build_function_type (void_type_node
,
2063 start_preparsed_function (fndecl
, /*attrs=*/NULL_TREE
, SF_PRE_PARSED
);
2065 /* It can be a static function as long as collect2 does not have
2066 to scan the object file to find its ctor/dtor routine. */
2067 TREE_PUBLIC (current_function_decl
) = ! targetm
.have_ctors_dtors
;
2069 /* Mark this declaration as used to avoid spurious warnings. */
2070 TREE_USED (current_function_decl
) = 1;
2072 /* Mark this function as a global constructor or destructor. */
2073 if (method_type
== 'I')
2074 DECL_GLOBAL_CTOR_P (current_function_decl
) = 1;
2076 DECL_GLOBAL_DTOR_P (current_function_decl
) = 1;
2077 DECL_LANG_SPECIFIC (current_function_decl
)->decl_flags
.u2sel
= 1;
2079 body
= begin_compound_stmt (BCS_FN_BODY
);
2081 /* We cannot allow these functions to be elided, even if they do not
2082 have external linkage. And, there's no point in deferring
2083 compilation of thes functions; they're all going to have to be
2085 DECL_INLINE (current_function_decl
) = 0;
2086 DECL_UNINLINABLE (current_function_decl
) = 1;
2091 /* Finish the process of running a particular set of global constructors
2092 or destructors. Subroutine of do_[cd]tors. */
2095 finish_objects (int method_type
, int initp
, tree body
)
2100 finish_compound_stmt (body
);
2101 fn
= finish_function (0);
2102 expand_or_defer_fn (fn
);
2104 /* When only doing semantic analysis, and no RTL generation, we
2105 can't call functions that directly emit assembly code; there is
2106 no assembly file in which to put the code. */
2107 if (flag_syntax_only
)
2110 if (targetm
.have_ctors_dtors
)
2112 rtx fnsym
= XEXP (DECL_RTL (fn
), 0);
2113 if (method_type
== 'I')
2114 (* targetm
.asm_out
.constructor
) (fnsym
, initp
);
2116 (* targetm
.asm_out
.destructor
) (fnsym
, initp
);
2120 /* The names of the parameters to the function created to handle
2121 initializations and destructions for objects with static storage
2123 #define INITIALIZE_P_IDENTIFIER "__initialize_p"
2124 #define PRIORITY_IDENTIFIER "__priority"
2126 /* The name of the function we create to handle initializations and
2127 destructions for objects with static storage duration. */
2128 #define SSDF_IDENTIFIER "__static_initialization_and_destruction"
2130 /* The declaration for the __INITIALIZE_P argument. */
2131 static GTY(()) tree initialize_p_decl
;
2133 /* The declaration for the __PRIORITY argument. */
2134 static GTY(()) tree priority_decl
;
2136 /* The declaration for the static storage duration function. */
2137 static GTY(()) tree ssdf_decl
;
2139 /* All the static storage duration functions created in this
2140 translation unit. */
2141 static GTY(()) varray_type ssdf_decls
;
2143 /* A map from priority levels to information about that priority
2144 level. There may be many such levels, so efficient lookup is
2146 static splay_tree priority_info_map
;
2148 /* Begins the generation of the function that will handle all
2149 initialization and destruction of objects with static storage
2150 duration. The function generated takes two parameters of type
2151 `int': __INITIALIZE_P and __PRIORITY. If __INITIALIZE_P is
2152 nonzero, it performs initializations. Otherwise, it performs
2153 destructions. It only performs those initializations or
2154 destructions with the indicated __PRIORITY. The generated function
2157 It is assumed that this function will only be called once per
2158 translation unit. */
2161 start_static_storage_duration_function (unsigned count
)
2166 char id
[sizeof (SSDF_IDENTIFIER
) + 1 /* '\0' */ + 32];
2168 /* Create the identifier for this function. It will be of the form
2169 SSDF_IDENTIFIER_<number>. */
2170 sprintf (id
, "%s_%u", SSDF_IDENTIFIER
, count
);
2172 /* Create the parameters. */
2173 parm_types
= void_list_node
;
2174 parm_types
= tree_cons (NULL_TREE
, integer_type_node
, parm_types
);
2175 parm_types
= tree_cons (NULL_TREE
, integer_type_node
, parm_types
);
2176 type
= build_function_type (void_type_node
, parm_types
);
2178 /* Create the FUNCTION_DECL itself. */
2179 ssdf_decl
= build_lang_decl (FUNCTION_DECL
,
2180 get_identifier (id
),
2182 TREE_PUBLIC (ssdf_decl
) = 0;
2183 DECL_ARTIFICIAL (ssdf_decl
) = 1;
2185 /* Put this function in the list of functions to be called from the
2186 static constructors and destructors. */
2189 VARRAY_TREE_INIT (ssdf_decls
, 32, "ssdf_decls");
2191 /* Take this opportunity to initialize the map from priority
2192 numbers to information about that priority level. */
2193 priority_info_map
= splay_tree_new (splay_tree_compare_ints
,
2194 /*delete_key_fn=*/0,
2195 /*delete_value_fn=*/
2196 (splay_tree_delete_value_fn
) &free
);
2198 /* We always need to generate functions for the
2199 DEFAULT_INIT_PRIORITY so enter it now. That way when we walk
2200 priorities later, we'll be sure to find the
2201 DEFAULT_INIT_PRIORITY. */
2202 get_priority_info (DEFAULT_INIT_PRIORITY
);
2205 VARRAY_PUSH_TREE (ssdf_decls
, ssdf_decl
);
2207 /* Create the argument list. */
2208 initialize_p_decl
= cp_build_parm_decl
2209 (get_identifier (INITIALIZE_P_IDENTIFIER
), integer_type_node
);
2210 DECL_CONTEXT (initialize_p_decl
) = ssdf_decl
;
2211 TREE_USED (initialize_p_decl
) = 1;
2212 priority_decl
= cp_build_parm_decl
2213 (get_identifier (PRIORITY_IDENTIFIER
), integer_type_node
);
2214 DECL_CONTEXT (priority_decl
) = ssdf_decl
;
2215 TREE_USED (priority_decl
) = 1;
2217 TREE_CHAIN (initialize_p_decl
) = priority_decl
;
2218 DECL_ARGUMENTS (ssdf_decl
) = initialize_p_decl
;
2220 /* Put the function in the global scope. */
2221 pushdecl (ssdf_decl
);
2223 /* Start the function itself. This is equivalent to declaring the
2226 static void __ssdf (int __initialize_p, init __priority_p);
2228 It is static because we only need to call this function from the
2229 various constructor and destructor functions for this module. */
2230 start_preparsed_function (ssdf_decl
,
2231 /*attrs=*/NULL_TREE
,
2234 /* Set up the scope of the outermost block in the function. */
2235 body
= begin_compound_stmt (BCS_FN_BODY
);
2237 /* This function must not be deferred because we are depending on
2238 its compilation to tell us what is TREE_SYMBOL_REFERENCED. */
2239 DECL_INLINE (ssdf_decl
) = 0;
2240 DECL_UNINLINABLE (ssdf_decl
) = 1;
2245 /* Finish the generation of the function which performs initialization
2246 and destruction of objects with static storage duration. After
2247 this point, no more such objects can be created. */
2250 finish_static_storage_duration_function (tree body
)
2252 /* Close out the function. */
2253 finish_compound_stmt (body
);
2254 expand_or_defer_fn (finish_function (0));
2257 /* Return the information about the indicated PRIORITY level. If no
2258 code to handle this level has yet been generated, generate the
2259 appropriate prologue. */
2261 static priority_info
2262 get_priority_info (int priority
)
2267 n
= splay_tree_lookup (priority_info_map
,
2268 (splay_tree_key
) priority
);
2271 /* Create a new priority information structure, and insert it
2273 pi
= xmalloc (sizeof (struct priority_info_s
));
2274 pi
->initializations_p
= 0;
2275 pi
->destructions_p
= 0;
2276 splay_tree_insert (priority_info_map
,
2277 (splay_tree_key
) priority
,
2278 (splay_tree_value
) pi
);
2281 pi
= (priority_info
) n
->value
;
2286 /* Set up to handle the initialization or destruction of DECL. If
2287 INITP is nonzero, we are initializing the variable. Otherwise, we
2288 are destroying it. */
2291 start_static_initialization_or_destruction (tree decl
, int initp
)
2293 tree guard_if_stmt
= NULL_TREE
;
2300 /* Figure out the priority for this declaration. */
2301 priority
= DECL_INIT_PRIORITY (decl
);
2303 priority
= DEFAULT_INIT_PRIORITY
;
2305 /* Remember that we had an initialization or finalization at this
2307 pi
= get_priority_info (priority
);
2309 pi
->initializations_p
= 1;
2311 pi
->destructions_p
= 1;
2313 /* Trick the compiler into thinking we are at the file and line
2314 where DECL was declared so that error-messages make sense, and so
2315 that the debugger will show somewhat sensible file and line
2317 input_location
= DECL_SOURCE_LOCATION (decl
);
2323 Access control for implicit calls to the constructors,
2324 the conversion functions, or the destructor called to
2325 create and destroy a static data member is performed as
2326 if these calls appeared in the scope of the member's
2329 we pretend we are in a static member function of the class of
2330 which the DECL is a member. */
2331 if (member_p (decl
))
2333 DECL_CONTEXT (current_function_decl
) = DECL_CONTEXT (decl
);
2334 DECL_STATIC_FUNCTION_P (current_function_decl
) = 1;
2337 /* Conditionalize this initialization on being in the right priority
2338 and being initializing/finalizing appropriately. */
2339 guard_if_stmt
= begin_if_stmt ();
2340 cond
= cp_build_binary_op (EQ_EXPR
,
2342 build_int_cst (NULL_TREE
, priority
));
2343 init_cond
= initp
? integer_one_node
: integer_zero_node
;
2344 init_cond
= cp_build_binary_op (EQ_EXPR
,
2347 cond
= cp_build_binary_op (TRUTH_ANDIF_EXPR
, cond
, init_cond
);
2349 /* Assume we don't need a guard. */
2351 /* We need a guard if this is an object with external linkage that
2352 might be initialized in more than one place. (For example, a
2353 static data member of a template, when the data member requires
2355 if (TREE_PUBLIC (decl
) && (DECL_COMMON (decl
)
2356 || DECL_ONE_ONLY (decl
)
2357 || DECL_WEAK (decl
)))
2361 guard
= get_guard (decl
);
2363 /* When using __cxa_atexit, we just check the GUARD as we would
2364 for a local static. */
2365 if (flag_use_cxa_atexit
)
2367 /* When using __cxa_atexit, we never try to destroy
2368 anything from a static destructor. */
2370 guard_cond
= get_guard_cond (guard
);
2372 /* If we don't have __cxa_atexit, then we will be running
2373 destructors from .fini sections, or their equivalents. So,
2374 we need to know how many times we've tried to initialize this
2375 object. We do initializations only if the GUARD is zero,
2376 i.e., if we are the first to initialize the variable. We do
2377 destructions only if the GUARD is one, i.e., if we are the
2378 last to destroy the variable. */
2381 = cp_build_binary_op (EQ_EXPR
,
2382 build_unary_op (PREINCREMENT_EXPR
,
2388 = cp_build_binary_op (EQ_EXPR
,
2389 build_unary_op (PREDECREMENT_EXPR
,
2394 cond
= cp_build_binary_op (TRUTH_ANDIF_EXPR
, cond
, guard_cond
);
2397 finish_if_stmt_cond (cond
, guard_if_stmt
);
2399 /* If we're using __cxa_atexit, we have not already set the GUARD,
2400 so we must do so now. */
2401 if (guard
&& initp
&& flag_use_cxa_atexit
)
2402 finish_expr_stmt (set_guard (guard
));
2404 return guard_if_stmt
;
2407 /* We've just finished generating code to do an initialization or
2408 finalization. GUARD_IF_STMT is the if-statement we used to guard
2409 the initialization. */
2412 finish_static_initialization_or_destruction (tree guard_if_stmt
)
2414 finish_then_clause (guard_if_stmt
);
2415 finish_if_stmt (guard_if_stmt
);
2417 /* Now that we're done with DECL we don't need to pretend to be a
2418 member of its class any longer. */
2419 DECL_CONTEXT (current_function_decl
) = NULL_TREE
;
2420 DECL_STATIC_FUNCTION_P (current_function_decl
) = 0;
2423 /* Generate code to do the initialization of DECL, a VAR_DECL with
2424 static storage duration. The initialization is INIT. */
2427 do_static_initialization (tree decl
, tree init
)
2431 /* Set up for the initialization. */
2433 = start_static_initialization_or_destruction (decl
,
2436 /* Perform the initialization. */
2438 finish_expr_stmt (init
);
2440 /* If we're using __cxa_atexit, register a function that calls the
2441 destructor for the object. */
2442 if (flag_use_cxa_atexit
)
2443 finish_expr_stmt (register_dtor_fn (decl
));
2446 finish_static_initialization_or_destruction (guard_if_stmt
);
2449 /* Generate code to do the static destruction of DECL. If DECL may be
2450 initialized more than once in different object files, GUARD is the
2451 guard variable to check. PRIORITY is the priority for the
2455 do_static_destruction (tree decl
)
2459 /* If we're using __cxa_atexit, then destructors are registered
2460 immediately after objects are initialized. */
2461 gcc_assert (!flag_use_cxa_atexit
);
2463 /* If we don't need a destructor, there's nothing to do. */
2464 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl
)))
2467 /* Actually do the destruction. */
2468 guard_if_stmt
= start_static_initialization_or_destruction (decl
,
2470 finish_expr_stmt (build_cleanup (decl
));
2471 finish_static_initialization_or_destruction (guard_if_stmt
);
2474 /* VARS is a list of variables with static storage duration which may
2475 need initialization and/or finalization. Remove those variables
2476 that don't really need to be initialized or finalized, and return
2477 the resulting list. The order in which the variables appear in
2478 VARS is in reverse order of the order in which they should actually
2479 be initialized. The list we return is in the unreversed order;
2480 i.e., the first variable should be initialized first. */
2483 prune_vars_needing_no_initialization (tree
*vars
)
2486 tree result
= NULL_TREE
;
2491 tree decl
= TREE_VALUE (t
);
2492 tree init
= TREE_PURPOSE (t
);
2494 /* Deal gracefully with error. */
2495 if (decl
== error_mark_node
)
2497 var
= &TREE_CHAIN (t
);
2501 /* The only things that can be initialized are variables. */
2502 gcc_assert (TREE_CODE (decl
) == VAR_DECL
);
2504 /* If this object is not defined, we don't need to do anything
2506 if (DECL_EXTERNAL (decl
))
2508 var
= &TREE_CHAIN (t
);
2512 /* Also, if the initializer already contains errors, we can bail
2514 if (init
&& TREE_CODE (init
) == TREE_LIST
2515 && value_member (error_mark_node
, init
))
2517 var
= &TREE_CHAIN (t
);
2521 /* This variable is going to need initialization and/or
2522 finalization, so we add it to the list. */
2523 *var
= TREE_CHAIN (t
);
2524 TREE_CHAIN (t
) = result
;
2531 /* Make sure we have told the back end about all the variables in
2535 write_out_vars (tree vars
)
2539 for (v
= vars
; v
; v
= TREE_CHAIN (v
))
2541 tree var
= TREE_VALUE (v
);
2542 if (!var_finalized_p (var
))
2544 import_export_decl (var
);
2545 rest_of_decl_compilation (var
, 1, 1);
2550 /* Generate a static constructor (if CONSTRUCTOR_P) or destructor
2551 (otherwise) that will initialize all gobal objects with static
2552 storage duration having the indicated PRIORITY. */
2555 generate_ctor_or_dtor_function (bool constructor_p
, int priority
,
2564 input_location
= *locus
;
2565 #ifdef USE_MAPPED_LOCATION
2571 /* We use `I' to indicate initialization and `D' to indicate
2573 function_key
= constructor_p
? 'I' : 'D';
2575 /* We emit the function lazily, to avoid generating empty
2576 global constructors and destructors. */
2579 /* Call the static storage duration function with appropriate
2582 for (i
= 0; i
< ssdf_decls
->elements_used
; ++i
)
2584 fndecl
= VARRAY_TREE (ssdf_decls
, i
);
2586 /* Calls to pure or const functions will expand to nothing. */
2587 if (! (flags_from_decl_or_type (fndecl
) & (ECF_CONST
| ECF_PURE
)))
2590 body
= start_objects (function_key
, priority
);
2592 arguments
= tree_cons (NULL_TREE
,
2593 build_int_cst (NULL_TREE
, priority
),
2595 arguments
= tree_cons (NULL_TREE
,
2596 build_int_cst (NULL_TREE
, constructor_p
),
2598 finish_expr_stmt (build_function_call (fndecl
, arguments
));
2602 /* If we're generating code for the DEFAULT_INIT_PRIORITY, throw in
2603 calls to any functions marked with attributes indicating that
2604 they should be called at initialization- or destruction-time. */
2605 if (priority
== DEFAULT_INIT_PRIORITY
)
2609 for (fns
= constructor_p
? static_ctors
: static_dtors
;
2611 fns
= TREE_CHAIN (fns
))
2613 fndecl
= TREE_VALUE (fns
);
2615 /* Calls to pure/const functions will expand to nothing. */
2616 if (! (flags_from_decl_or_type (fndecl
) & (ECF_CONST
| ECF_PURE
)))
2619 body
= start_objects (function_key
, priority
);
2620 finish_expr_stmt (build_function_call (fndecl
, NULL_TREE
));
2625 /* Close out the function. */
2627 finish_objects (function_key
, priority
, body
);
2630 /* Generate constructor and destructor functions for the priority
2634 generate_ctor_and_dtor_functions_for_priority (splay_tree_node n
, void * data
)
2636 location_t
*locus
= data
;
2637 int priority
= (int) n
->key
;
2638 priority_info pi
= (priority_info
) n
->value
;
2640 /* Generate the functions themselves, but only if they are really
2642 if (pi
->initializations_p
2643 || (priority
== DEFAULT_INIT_PRIORITY
&& static_ctors
))
2644 generate_ctor_or_dtor_function (/*constructor_p=*/true, priority
, locus
);
2645 if (pi
->destructions_p
2646 || (priority
== DEFAULT_INIT_PRIORITY
&& static_dtors
))
2647 generate_ctor_or_dtor_function (/*constructor_p=*/false, priority
, locus
);
2649 /* Keep iterating. */
2653 /* Called via LANGHOOK_CALLGRAPH_ANALYZE_EXPR. It is supposed to mark
2654 decls referenced from frontend specific constructs; it will be called
2655 only for language-specific tree nodes.
2657 Here we must deal with member pointers. */
2660 cxx_callgraph_analyze_expr (tree
*tp
, int *walk_subtrees ATTRIBUTE_UNUSED
,
2661 tree from ATTRIBUTE_UNUSED
)
2665 switch (TREE_CODE (t
))
2668 if (TYPE_PTRMEMFUNC_P (TREE_TYPE (t
)))
2669 cgraph_mark_needed_node (cgraph_node (PTRMEM_CST_MEMBER (t
)));
2672 if (TREE_CODE (BASELINK_FUNCTIONS (t
)) == FUNCTION_DECL
)
2673 cgraph_mark_needed_node (cgraph_node (BASELINK_FUNCTIONS (t
)));
2676 if (DECL_VTABLE_OR_VTT_P (t
))
2678 /* The ABI requires that all virtual tables be emitted
2679 whenever one of them is. */
2681 for (vtbl
= CLASSTYPE_VTABLES (DECL_CONTEXT (t
));
2683 vtbl
= TREE_CHAIN (vtbl
))
2684 mark_decl_referenced (vtbl
);
2686 else if (DECL_CONTEXT (t
)
2687 && TREE_CODE (DECL_CONTEXT (t
)) == FUNCTION_DECL
)
2688 /* If we need a static variable in a function, then we
2689 need the containing function. */
2690 mark_decl_referenced (DECL_CONTEXT (t
));
2699 /* This routine is called from the last rule in yyparse ().
2700 Its job is to create all the code needed to initialize and
2701 destroy the global aggregates. We do the destruction
2702 first, since that way we only need to reverse the decls once. */
2705 cp_finish_file (void)
2711 unsigned ssdf_count
= 0;
2714 locus
= input_location
;
2717 /* Bad parse errors. Just forget about it. */
2718 if (! global_bindings_p () || current_class_type
|| decl_namespace_list
)
2722 c_common_write_pch ();
2724 #ifdef USE_MAPPED_LOCATION
2727 /* Otherwise, GDB can get confused, because in only knows
2728 about source for LINENO-1 lines. */
2732 /* We now have to write out all the stuff we put off writing out.
2735 o Template specializations that we have not yet instantiated,
2736 but which are needed.
2737 o Initialization and destruction for non-local objects with
2738 static storage duration. (Local objects with static storage
2739 duration are initialized when their scope is first entered,
2740 and are cleaned up via atexit.)
2741 o Virtual function tables.
2743 All of these may cause others to be needed. For example,
2744 instantiating one function may cause another to be needed, and
2745 generating the initializer for an object may cause templates to be
2746 instantiated, etc., etc. */
2748 timevar_push (TV_VARCONST
);
2750 emit_support_tinfos ();
2758 /* If there are templates that we've put off instantiating, do
2760 instantiate_pending_templates (retries
);
2763 /* Write out virtual tables as required. Note that writing out
2764 the virtual table for a template class may cause the
2765 instantiation of members of that class. If we write out
2766 vtables then we remove the class from our list so we don't
2767 have to look at it again. */
2769 while (keyed_classes
!= NULL_TREE
2770 && maybe_emit_vtables (TREE_VALUE (keyed_classes
)))
2773 keyed_classes
= TREE_CHAIN (keyed_classes
);
2779 tree next
= TREE_CHAIN (t
);
2783 if (maybe_emit_vtables (TREE_VALUE (next
)))
2786 TREE_CHAIN (t
) = TREE_CHAIN (next
);
2791 next
= TREE_CHAIN (t
);
2795 /* Write out needed type info variables. We have to be careful
2796 looping through unemitted decls, because emit_tinfo_decl may
2797 cause other variables to be needed. New elements will be
2798 appended, and we remove from the vector those that actually
2800 for (i
= VEC_length (tree
, unemitted_tinfo_decls
);
2801 VEC_iterate (tree
, unemitted_tinfo_decls
, --i
, t
);)
2802 if (emit_tinfo_decl (t
))
2805 VEC_unordered_remove (tree
, unemitted_tinfo_decls
, i
);
2808 /* The list of objects with static storage duration is built up
2809 in reverse order. We clear STATIC_AGGREGATES so that any new
2810 aggregates added during the initialization of these will be
2811 initialized in the correct order when we next come around the
2813 vars
= prune_vars_needing_no_initialization (&static_aggregates
);
2819 /* We need to start a new initialization function each time
2820 through the loop. That's because we need to know which
2821 vtables have been referenced, and TREE_SYMBOL_REFERENCED
2822 isn't computed until a function is finished, and written
2823 out. That's a deficiency in the back-end. When this is
2824 fixed, these initialization functions could all become
2825 inline, with resulting performance improvements. */
2828 /* Set the line and file, so that it is obviously not from
2830 input_location
= locus
;
2831 ssdf_body
= start_static_storage_duration_function (ssdf_count
);
2833 /* Make sure the back end knows about all the variables. */
2834 write_out_vars (vars
);
2836 /* First generate code to do all the initializations. */
2837 for (v
= vars
; v
; v
= TREE_CHAIN (v
))
2838 do_static_initialization (TREE_VALUE (v
),
2841 /* Then, generate code to do all the destructions. Do these
2842 in reverse order so that the most recently constructed
2843 variable is the first destroyed. If we're using
2844 __cxa_atexit, then we don't need to do this; functions
2845 were registered at initialization time to destroy the
2847 if (!flag_use_cxa_atexit
)
2849 vars
= nreverse (vars
);
2850 for (v
= vars
; v
; v
= TREE_CHAIN (v
))
2851 do_static_destruction (TREE_VALUE (v
));
2856 /* Finish up the static storage duration function for this
2858 input_location
= locus
;
2859 finish_static_storage_duration_function (ssdf_body
);
2861 /* All those initializations and finalizations might cause
2862 us to need more inline functions, more template
2863 instantiations, etc. */
2866 #ifdef USE_MAPPED_LOCATION
2873 /* Go through the set of inline functions whose bodies have not
2874 been emitted yet. If out-of-line copies of these functions
2875 are required, emit them. */
2876 for (i
= 0; i
< deferred_fns_used
; ++i
)
2878 tree decl
= VARRAY_TREE (deferred_fns
, i
);
2880 /* Does it need synthesizing? */
2881 if (DECL_ARTIFICIAL (decl
) && ! DECL_INITIAL (decl
)
2882 && (! DECL_REALLY_EXTERN (decl
) || DECL_INLINE (decl
)))
2884 /* Even though we're already at the top-level, we push
2885 there again. That way, when we pop back a few lines
2886 hence, all of our state is restored. Otherwise,
2887 finish_function doesn't clean things up, and we end
2888 up with CURRENT_FUNCTION_DECL set. */
2889 push_to_top_level ();
2890 synthesize_method (decl
);
2891 pop_from_top_level ();
2895 if (!DECL_SAVED_TREE (decl
))
2898 import_export_decl (decl
);
2900 /* We lie to the back-end, pretending that some functions
2901 are not defined when they really are. This keeps these
2902 functions from being put out unnecessarily. But, we must
2903 stop lying when the functions are referenced, or if they
2904 are not comdat since they need to be put out now. This
2905 is done in a separate for cycle, because if some deferred
2906 function is contained in another deferred function later
2907 in deferred_fns varray, rest_of_compilation would skip
2908 this function and we really cannot expand the same
2910 if (DECL_NOT_REALLY_EXTERN (decl
)
2911 && DECL_INITIAL (decl
)
2912 && decl_needed_p (decl
))
2913 DECL_EXTERNAL (decl
) = 0;
2915 /* If we're going to need to write this function out, and
2916 there's already a body for it, create RTL for it now.
2917 (There might be no body if this is a method we haven't
2918 gotten around to synthesizing yet.) */
2919 if (!DECL_EXTERNAL (decl
)
2920 && decl_needed_p (decl
)
2921 && !TREE_ASM_WRITTEN (decl
)
2922 && !cgraph_node (decl
)->local
.finalized
)
2924 /* We will output the function; no longer consider it in this
2926 DECL_DEFER_OUTPUT (decl
) = 0;
2927 /* Generate RTL for this function now that we know we
2929 expand_or_defer_fn (decl
);
2930 /* If we're compiling -fsyntax-only pretend that this
2931 function has been written out so that we don't try to
2933 if (flag_syntax_only
)
2934 TREE_ASM_WRITTEN (decl
) = 1;
2939 if (walk_namespaces (wrapup_globals_for_namespace
, /*data=*/0))
2942 /* Static data members are just like namespace-scope globals. */
2943 for (i
= 0; i
< pending_statics_used
; ++i
)
2945 tree decl
= VARRAY_TREE (pending_statics
, i
);
2946 if (var_finalized_p (decl
) || DECL_REALLY_EXTERN (decl
))
2948 import_export_decl (decl
);
2949 /* If this static data member is needed, provide it to the
2951 if (DECL_NOT_REALLY_EXTERN (decl
) && decl_needed_p (decl
))
2952 DECL_EXTERNAL (decl
) = 0;
2955 && wrapup_global_declarations (&VARRAY_TREE (pending_statics
, 0),
2956 pending_statics_used
))
2959 /* Ask the back end to emit functions and variables that are
2960 enqueued. These emissions may result in marking more entities
2962 if (cgraph_assemble_pending_functions ())
2964 if (cgraph_varpool_assemble_pending_decls ())
2971 /* All used inline functions must have a definition at this point. */
2972 for (i
= 0; i
< deferred_fns_used
; ++i
)
2974 tree decl
= VARRAY_TREE (deferred_fns
, i
);
2976 if (/* Check online inline functions that were actually used. */
2977 TREE_USED (decl
) && DECL_DECLARED_INLINE_P (decl
)
2978 /* But not defined. */
2979 && DECL_REALLY_EXTERN (decl
)
2980 /* If we decided to emit this function in another
2981 translation unit, the fact that the definition was
2982 missing here likely indicates only that the repository
2983 decided to place the function elsewhere. With -Winline,
2984 we will still warn if we could not inline the
2986 && !flag_use_repository
2987 /* An explicit instantiation can be used to specify
2988 that the body is in another unit. It will have
2989 already verified there was a definition. */
2990 && !DECL_EXPLICIT_INSTANTIATION (decl
))
2992 cp_warning_at ("inline function %qD used but never defined", decl
);
2993 /* This symbol is effectively an "extern" declaration now.
2994 This is not strictly necessary, but removes a duplicate
2996 TREE_PUBLIC (decl
) = 1;
3000 /* We give C linkage to static constructors and destructors. */
3001 push_lang_context (lang_name_c
);
3003 /* Generate initialization and destruction functions for all
3004 priorities for which they are required. */
3005 if (priority_info_map
)
3006 splay_tree_foreach (priority_info_map
,
3007 generate_ctor_and_dtor_functions_for_priority
,
3013 generate_ctor_or_dtor_function (/*constructor_p=*/true,
3014 DEFAULT_INIT_PRIORITY
, &locus
);
3016 generate_ctor_or_dtor_function (/*constructor_p=*/false,
3017 DEFAULT_INIT_PRIORITY
, &locus
);
3020 /* We're done with the splay-tree now. */
3021 if (priority_info_map
)
3022 splay_tree_delete (priority_info_map
);
3024 /* Generate any missing aliases. */
3025 maybe_apply_pending_pragma_weaks ();
3027 /* We're done with static constructors, so we can go back to "C++"
3029 pop_lang_context ();
3031 cgraph_finalize_compilation_unit ();
3034 /* Now, issue warnings about static, but not defined, functions,
3035 etc., and emit debugging information. */
3036 walk_namespaces (wrapup_globals_for_namespace
, /*data=*/&reconsider
);
3037 if (pending_statics
)
3038 check_global_declarations (&VARRAY_TREE (pending_statics
, 0),
3039 pending_statics_used
);
3043 /* The entire file is now complete. If requested, dump everything
3047 FILE *stream
= dump_begin (TDI_tu
, &flags
);
3051 dump_node (global_namespace
, flags
& ~TDF_SLIM
, stream
);
3052 dump_end (TDI_tu
, stream
);
3056 timevar_pop (TV_VARCONST
);
3058 if (flag_detailed_statistics
)
3060 dump_tree_statistics ();
3061 dump_time_statistics ();
3063 input_location
= locus
;
3065 #ifdef ENABLE_CHECKING
3066 validate_conversion_obstack ();
3067 #endif /* ENABLE_CHECKING */
3070 /* FN is an OFFSET_REF, DOTSTAR_EXPR or MEMBER_REF indicating the
3071 function to call in parse-tree form; it has not yet been
3072 semantically analyzed. ARGS are the arguments to the function.
3073 They have already been semantically analyzed. */
3076 build_offset_ref_call_from_tree (tree fn
, tree args
)
3085 object
= TREE_OPERAND (fn
, 0);
3087 if (processing_template_decl
)
3089 gcc_assert (TREE_CODE (fn
) == DOTSTAR_EXPR
3090 || TREE_CODE (fn
) == MEMBER_REF
);
3091 if (type_dependent_expression_p (fn
)
3092 || any_type_dependent_arguments_p (args
))
3093 return build_min_nt (CALL_EXPR
, fn
, args
, NULL_TREE
);
3095 /* Transform the arguments and add the implicit "this"
3096 parameter. That must be done before the FN is transformed
3097 because we depend on the form of FN. */
3098 args
= build_non_dependent_args (args
);
3099 if (TREE_CODE (fn
) == DOTSTAR_EXPR
)
3100 object
= build_unary_op (ADDR_EXPR
, object
, 0);
3101 object
= build_non_dependent_expr (object
);
3102 args
= tree_cons (NULL_TREE
, object
, args
);
3103 /* Now that the arguments are done, transform FN. */
3104 fn
= build_non_dependent_expr (fn
);
3107 /* A qualified name corresponding to a bound pointer-to-member is
3108 represented as an OFFSET_REF:
3110 struct B { void g(); };
3112 void B::g() { (this->*p)(); } */
3113 if (TREE_CODE (fn
) == OFFSET_REF
)
3115 tree object_addr
= build_unary_op (ADDR_EXPR
, object
, 0);
3116 fn
= TREE_OPERAND (fn
, 1);
3117 fn
= get_member_function_from_ptrfunc (&object_addr
, fn
);
3118 args
= tree_cons (NULL_TREE
, object_addr
, args
);
3121 expr
= build_function_call (fn
, args
);
3122 if (processing_template_decl
&& expr
!= error_mark_node
)
3123 return build_min_non_dep (CALL_EXPR
, expr
, orig_fn
, orig_args
, NULL_TREE
);
3129 check_default_args (tree x
)
3131 tree arg
= TYPE_ARG_TYPES (TREE_TYPE (x
));
3132 bool saw_def
= false;
3133 int i
= 0 - (TREE_CODE (TREE_TYPE (x
)) == METHOD_TYPE
);
3134 for (; arg
&& arg
!= void_list_node
; arg
= TREE_CHAIN (arg
), ++i
)
3136 if (TREE_PURPOSE (arg
))
3140 cp_error_at ("default argument missing for parameter %P of %q+#D",
3148 mark_used (tree decl
)
3150 TREE_USED (decl
) = 1;
3151 if (processing_template_decl
|| skip_evaluation
)
3154 if (TREE_CODE (decl
) == FUNCTION_DECL
&& DECL_DECLARED_INLINE_P (decl
)
3155 && !TREE_ASM_WRITTEN (decl
))
3156 /* Remember it, so we can check it was defined. */
3158 if (DECL_DEFERRED_FN (decl
))
3160 note_vague_linkage_fn (decl
);
3163 assemble_external (decl
);
3165 /* Is it a synthesized method that needs to be synthesized? */
3166 if (TREE_CODE (decl
) == FUNCTION_DECL
3167 && DECL_NONSTATIC_MEMBER_FUNCTION_P (decl
)
3168 && DECL_ARTIFICIAL (decl
)
3169 && !DECL_THUNK_P (decl
)
3170 && ! DECL_INITIAL (decl
)
3171 /* Kludge: don't synthesize for default args. Unfortunately this
3172 rules out initializers of namespace-scoped objects too, but
3173 it's sort-of ok if the implicit ctor or dtor decl keeps
3174 pointing to the class location. */
3175 && current_function_decl
)
3177 /* Put the function definition at the position where it is needed,
3178 rather than within the body of the class. That way, an error
3179 during the generation of the implicit body points at the place
3180 where the attempt to generate the function occurs, giving the
3181 user a hint as to why we are attempting to generate the
3183 DECL_SOURCE_LOCATION (decl
) = input_location
;
3185 synthesize_method (decl
);
3186 /* If we've already synthesized the method we don't need to
3187 instantiate it, so we can return right away. */
3191 /* If this is a function or variable that is an instance of some
3192 template, we now know that we will need to actually do the
3193 instantiation. We check that DECL is not an explicit
3194 instantiation because that is not checked in instantiate_decl. */
3195 if ((DECL_NON_THUNK_FUNCTION_P (decl
) || TREE_CODE (decl
) == VAR_DECL
)
3196 && DECL_LANG_SPECIFIC (decl
) && DECL_TEMPLATE_INFO (decl
)
3197 && (!DECL_EXPLICIT_INSTANTIATION (decl
)
3198 || (TREE_CODE (decl
) == FUNCTION_DECL
3199 && DECL_INLINE (DECL_TEMPLATE_RESULT
3200 (template_for_substitution (decl
))))))
3201 /* We put off instantiating functions in order to improve compile
3202 times. Maintaining a stack of active functions is expensive,
3203 and the inliner knows to instantiate any functions it might
3205 instantiate_decl (decl
, /*defer_ok=*/true, /*undefined_ok=*/0);
3208 #include "gt-cp-decl2.h"