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, 2007, 2008, 2009
4 Free Software Foundation, Inc.
5 Hacked by Michael Tiemann (tiemann@cygnus.com)
7 This file is part of GCC.
9 GCC is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3, or (at your option)
14 GCC is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with GCC; see the file COPYING3. If not see
21 <http://www.gnu.org/licenses/>. */
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"
52 #include "tree-dump.h"
56 extern cpp_reader
*parse_in
;
58 /* This structure contains information about the initializations
59 and/or destructions required for a particular priority level. */
60 typedef struct priority_info_s
{
61 /* Nonzero if there have been any initializations at this priority
62 throughout the translation unit. */
63 int initializations_p
;
64 /* Nonzero if there have been any destructions at this priority
65 throughout the translation unit. */
69 static void mark_vtable_entries (tree
);
70 static bool maybe_emit_vtables (tree
);
71 static bool acceptable_java_type (tree
);
72 static tree
start_objects (int, int);
73 static void finish_objects (int, int, tree
);
74 static tree
start_static_storage_duration_function (unsigned);
75 static void finish_static_storage_duration_function (tree
);
76 static priority_info
get_priority_info (int);
77 static void do_static_initialization_or_destruction (tree
, bool);
78 static void one_static_initialization_or_destruction (tree
, tree
, bool);
79 static void generate_ctor_or_dtor_function (bool, int, location_t
*);
80 static int generate_ctor_and_dtor_functions_for_priority (splay_tree_node
,
82 static tree
prune_vars_needing_no_initialization (tree
*);
83 static void write_out_vars (tree
);
84 static void import_export_class (tree
);
85 static tree
get_guard_bits (tree
);
86 static void determine_visibility_from_class (tree
, tree
);
88 /* A list of static class variables. This is needed, because a
89 static class variable can be declared inside the class without
90 an initializer, and then initialized, statically, outside the class. */
91 static GTY(()) VEC(tree
,gc
) *pending_statics
;
93 /* A list of functions which were declared inline, but which we
94 may need to emit outline anyway. */
95 static GTY(()) VEC(tree
,gc
) *deferred_fns
;
97 /* Nonzero if we're done parsing and into end-of-file activities. */
103 /* Return a member function type (a METHOD_TYPE), given FNTYPE (a
104 FUNCTION_TYPE), CTYPE (class type), and QUALS (the cv-qualifiers
105 that apply to the function). */
108 build_memfn_type (tree fntype
, tree ctype
, cp_cv_quals quals
)
113 if (fntype
== error_mark_node
|| ctype
== error_mark_node
)
114 return error_mark_node
;
116 type_quals
= quals
& ~TYPE_QUAL_RESTRICT
;
117 ctype
= cp_build_qualified_type (ctype
, type_quals
);
118 fntype
= build_method_type_directly (ctype
, TREE_TYPE (fntype
),
119 (TREE_CODE (fntype
) == METHOD_TYPE
120 ? TREE_CHAIN (TYPE_ARG_TYPES (fntype
))
121 : TYPE_ARG_TYPES (fntype
)));
122 raises
= TYPE_RAISES_EXCEPTIONS (fntype
);
124 fntype
= build_exception_variant (fntype
, raises
);
129 /* Build a PARM_DECL with NAME and TYPE, and set DECL_ARG_TYPE
133 cp_build_parm_decl (tree name
, tree type
)
135 tree parm
= build_decl (input_location
,
136 PARM_DECL
, name
, type
);
137 /* DECL_ARG_TYPE is only used by the back end and the back end never
139 if (!processing_template_decl
)
140 DECL_ARG_TYPE (parm
) = type_passed_as (type
);
142 /* If the type is a pack expansion, then we have a function
144 if (type
&& TREE_CODE (type
) == TYPE_PACK_EXPANSION
)
145 FUNCTION_PARAMETER_PACK_P (parm
) = 1;
150 /* Returns a PARM_DECL for a parameter of the indicated TYPE, with the
154 build_artificial_parm (tree name
, tree type
)
156 tree parm
= cp_build_parm_decl (name
, type
);
157 DECL_ARTIFICIAL (parm
) = 1;
158 /* All our artificial parms are implicitly `const'; they cannot be
160 TREE_READONLY (parm
) = 1;
164 /* Constructors for types with virtual baseclasses need an "in-charge" flag
165 saying whether this constructor is responsible for initialization of
166 virtual baseclasses or not. All destructors also need this "in-charge"
167 flag, which additionally determines whether or not the destructor should
168 free the memory for the object.
170 This function adds the "in-charge" flag to member function FN if
171 appropriate. It is called from grokclassfn and tsubst.
172 FN must be either a constructor or destructor.
174 The in-charge flag follows the 'this' parameter, and is followed by the
175 VTT parm (if any), then the user-written parms. */
178 maybe_retrofit_in_chrg (tree fn
)
180 tree basetype
, arg_types
, parms
, parm
, fntype
;
182 /* If we've already add the in-charge parameter don't do it again. */
183 if (DECL_HAS_IN_CHARGE_PARM_P (fn
))
186 /* When processing templates we can't know, in general, whether or
187 not we're going to have virtual baseclasses. */
188 if (processing_template_decl
)
191 /* We don't need an in-charge parameter for constructors that don't
192 have virtual bases. */
193 if (DECL_CONSTRUCTOR_P (fn
)
194 && !CLASSTYPE_VBASECLASSES (DECL_CONTEXT (fn
)))
197 arg_types
= TYPE_ARG_TYPES (TREE_TYPE (fn
));
198 basetype
= TREE_TYPE (TREE_VALUE (arg_types
));
199 arg_types
= TREE_CHAIN (arg_types
);
201 parms
= TREE_CHAIN (DECL_ARGUMENTS (fn
));
203 /* If this is a subobject constructor or destructor, our caller will
204 pass us a pointer to our VTT. */
205 if (CLASSTYPE_VBASECLASSES (DECL_CONTEXT (fn
)))
207 parm
= build_artificial_parm (vtt_parm_identifier
, vtt_parm_type
);
209 /* First add it to DECL_ARGUMENTS between 'this' and the real args... */
210 TREE_CHAIN (parm
) = parms
;
213 /* ...and then to TYPE_ARG_TYPES. */
214 arg_types
= hash_tree_chain (vtt_parm_type
, arg_types
);
216 DECL_HAS_VTT_PARM_P (fn
) = 1;
219 /* Then add the in-charge parm (before the VTT parm). */
220 parm
= build_artificial_parm (in_charge_identifier
, integer_type_node
);
221 TREE_CHAIN (parm
) = parms
;
223 arg_types
= hash_tree_chain (integer_type_node
, arg_types
);
225 /* Insert our new parameter(s) into the list. */
226 TREE_CHAIN (DECL_ARGUMENTS (fn
)) = parms
;
228 /* And rebuild the function type. */
229 fntype
= build_method_type_directly (basetype
, TREE_TYPE (TREE_TYPE (fn
)),
231 if (TYPE_RAISES_EXCEPTIONS (TREE_TYPE (fn
)))
232 fntype
= build_exception_variant (fntype
,
233 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (fn
)));
234 TREE_TYPE (fn
) = fntype
;
236 /* Now we've got the in-charge parameter. */
237 DECL_HAS_IN_CHARGE_PARM_P (fn
) = 1;
240 /* Classes overload their constituent function names automatically.
241 When a function name is declared in a record structure,
242 its name is changed to it overloaded name. Since names for
243 constructors and destructors can conflict, we place a leading
246 CNAME is the name of the class we are grokking for.
248 FUNCTION is a FUNCTION_DECL. It was created by `grokdeclarator'.
250 FLAGS contains bits saying what's special about today's
251 arguments. 1 == DESTRUCTOR. 2 == OPERATOR.
253 If FUNCTION is a destructor, then we must add the `auto-delete' field
254 as a second parameter. There is some hair associated with the fact
255 that we must "declare" this variable in the manner consistent with the
256 way the rest of the arguments were declared.
258 QUALS are the qualifiers for the this pointer. */
261 grokclassfn (tree ctype
, tree function
, enum overload_flags flags
)
263 tree fn_name
= DECL_NAME (function
);
265 /* Even within an `extern "C"' block, members get C++ linkage. See
266 [dcl.link] for details. */
267 SET_DECL_LANGUAGE (function
, lang_cplusplus
);
269 if (fn_name
== NULL_TREE
)
271 error ("name missing for member function");
272 fn_name
= get_identifier ("<anonymous>");
273 DECL_NAME (function
) = fn_name
;
276 DECL_CONTEXT (function
) = ctype
;
278 if (flags
== DTOR_FLAG
)
279 DECL_DESTRUCTOR_P (function
) = 1;
281 if (flags
== DTOR_FLAG
|| DECL_CONSTRUCTOR_P (function
))
282 maybe_retrofit_in_chrg (function
);
285 /* Create an ARRAY_REF, checking for the user doing things backwards
289 grok_array_decl (tree array_expr
, tree index_exp
)
293 tree orig_array_expr
= array_expr
;
294 tree orig_index_exp
= index_exp
;
296 if (error_operand_p (array_expr
) || error_operand_p (index_exp
))
297 return error_mark_node
;
299 if (processing_template_decl
)
301 if (type_dependent_expression_p (array_expr
)
302 || type_dependent_expression_p (index_exp
))
303 return build_min_nt (ARRAY_REF
, array_expr
, index_exp
,
304 NULL_TREE
, NULL_TREE
);
305 array_expr
= build_non_dependent_expr (array_expr
);
306 index_exp
= build_non_dependent_expr (index_exp
);
309 type
= TREE_TYPE (array_expr
);
311 type
= non_reference (type
);
313 /* If they have an `operator[]', use that. */
314 if (MAYBE_CLASS_TYPE_P (type
) || MAYBE_CLASS_TYPE_P (TREE_TYPE (index_exp
)))
315 expr
= build_new_op (ARRAY_REF
, LOOKUP_NORMAL
,
316 array_expr
, index_exp
, NULL_TREE
,
317 /*overloaded_p=*/NULL
, tf_warning_or_error
);
322 /* Otherwise, create an ARRAY_REF for a pointer or array type.
323 It is a little-known fact that, if `a' is an array and `i' is
324 an int, you can write `i[a]', which means the same thing as
326 if (TREE_CODE (type
) == ARRAY_TYPE
)
329 p1
= build_expr_type_conversion (WANT_POINTER
, array_expr
, false);
331 if (TREE_CODE (TREE_TYPE (index_exp
)) == ARRAY_TYPE
)
334 p2
= build_expr_type_conversion (WANT_POINTER
, index_exp
, false);
336 i1
= build_expr_type_conversion (WANT_INT
| WANT_ENUM
, array_expr
,
338 i2
= build_expr_type_conversion (WANT_INT
| WANT_ENUM
, index_exp
,
341 if ((p1
&& i2
) && (i1
&& p2
))
342 error ("ambiguous conversion for array subscript");
345 array_expr
= p1
, index_exp
= i2
;
347 array_expr
= p2
, index_exp
= i1
;
350 error ("invalid types %<%T[%T]%> for array subscript",
351 type
, TREE_TYPE (index_exp
));
352 return error_mark_node
;
355 if (array_expr
== error_mark_node
|| index_exp
== error_mark_node
)
356 error ("ambiguous conversion for array subscript");
358 expr
= build_array_ref (input_location
, array_expr
, index_exp
);
360 if (processing_template_decl
&& expr
!= error_mark_node
)
361 return build_min_non_dep (ARRAY_REF
, expr
, orig_array_expr
, orig_index_exp
,
362 NULL_TREE
, NULL_TREE
);
366 /* Given the cast expression EXP, checking out its validity. Either return
367 an error_mark_node if there was an unavoidable error, return a cast to
368 void for trying to delete a pointer w/ the value 0, or return the
369 call to delete. If DOING_VEC is true, we handle things differently
370 for doing an array delete.
371 Implements ARM $5.3.4. This is called from the parser. */
374 delete_sanity (tree exp
, tree size
, bool doing_vec
, int use_global_delete
)
378 if (exp
== error_mark_node
)
381 if (processing_template_decl
)
383 t
= build_min (DELETE_EXPR
, void_type_node
, exp
, size
);
384 DELETE_EXPR_USE_GLOBAL (t
) = use_global_delete
;
385 DELETE_EXPR_USE_VEC (t
) = doing_vec
;
386 TREE_SIDE_EFFECTS (t
) = 1;
390 /* An array can't have been allocated by new, so complain. */
391 if (TREE_CODE (exp
) == VAR_DECL
392 && TREE_CODE (TREE_TYPE (exp
)) == ARRAY_TYPE
)
393 warning (0, "deleting array %q#D", exp
);
395 t
= build_expr_type_conversion (WANT_POINTER
, exp
, true);
397 if (t
== NULL_TREE
|| t
== error_mark_node
)
399 error ("type %q#T argument given to %<delete%>, expected pointer",
401 return error_mark_node
;
404 type
= TREE_TYPE (t
);
406 /* As of Valley Forge, you can delete a pointer to const. */
408 /* You can't delete functions. */
409 if (TREE_CODE (TREE_TYPE (type
)) == FUNCTION_TYPE
)
411 error ("cannot delete a function. Only pointer-to-objects are "
412 "valid arguments to %<delete%>");
413 return error_mark_node
;
416 /* Deleting ptr to void is undefined behavior [expr.delete/3]. */
417 if (TREE_CODE (TREE_TYPE (type
)) == VOID_TYPE
)
419 warning (0, "deleting %qT is undefined", type
);
423 /* Deleting a pointer with the value zero is valid and has no effect. */
424 if (integer_zerop (t
))
425 return build1 (NOP_EXPR
, void_type_node
, t
);
428 return build_vec_delete (t
, /*maxindex=*/NULL_TREE
,
429 sfk_deleting_destructor
,
432 return build_delete (type
, t
, sfk_deleting_destructor
,
433 LOOKUP_NORMAL
, use_global_delete
);
436 /* Report an error if the indicated template declaration is not the
437 sort of thing that should be a member template. */
440 check_member_template (tree tmpl
)
444 gcc_assert (TREE_CODE (tmpl
) == TEMPLATE_DECL
);
445 decl
= DECL_TEMPLATE_RESULT (tmpl
);
447 if (TREE_CODE (decl
) == FUNCTION_DECL
448 || (TREE_CODE (decl
) == TYPE_DECL
449 && MAYBE_CLASS_TYPE_P (TREE_TYPE (decl
))))
451 /* The parser rejects template declarations in local classes. */
452 gcc_assert (!current_function_decl
);
453 /* The parser rejects any use of virtual in a function template. */
454 gcc_assert (!(TREE_CODE (decl
) == FUNCTION_DECL
455 && DECL_VIRTUAL_P (decl
)));
457 /* The debug-information generating code doesn't know what to do
458 with member templates. */
459 DECL_IGNORED_P (tmpl
) = 1;
462 error ("template declaration of %q#D", decl
);
465 /* Return true iff TYPE is a valid Java parameter or return type. */
468 acceptable_java_type (tree type
)
470 if (type
== error_mark_node
)
473 if (TREE_CODE (type
) == VOID_TYPE
|| TYPE_FOR_JAVA (type
))
475 if (TREE_CODE (type
) == POINTER_TYPE
|| TREE_CODE (type
) == REFERENCE_TYPE
)
477 type
= TREE_TYPE (type
);
478 if (TREE_CODE (type
) == RECORD_TYPE
)
481 if (! TYPE_FOR_JAVA (type
))
483 if (! CLASSTYPE_TEMPLATE_INFO (type
))
485 args
= CLASSTYPE_TI_ARGS (type
);
486 i
= TREE_VEC_LENGTH (args
);
489 type
= TREE_VEC_ELT (args
, i
);
490 if (TREE_CODE (type
) == POINTER_TYPE
)
491 type
= TREE_TYPE (type
);
492 if (! TYPE_FOR_JAVA (type
))
501 /* For a METHOD in a Java class CTYPE, return true if
502 the parameter and return types are valid Java types.
503 Otherwise, print appropriate error messages, and return false. */
506 check_java_method (tree method
)
509 tree arg_types
= TYPE_ARG_TYPES (TREE_TYPE (method
));
510 tree ret_type
= TREE_TYPE (TREE_TYPE (method
));
512 if (!acceptable_java_type (ret_type
))
514 error ("Java method %qD has non-Java return type %qT",
519 arg_types
= TREE_CHAIN (arg_types
);
520 if (DECL_HAS_IN_CHARGE_PARM_P (method
))
521 arg_types
= TREE_CHAIN (arg_types
);
522 if (DECL_HAS_VTT_PARM_P (method
))
523 arg_types
= TREE_CHAIN (arg_types
);
525 for (; arg_types
!= NULL_TREE
; arg_types
= TREE_CHAIN (arg_types
))
527 tree type
= TREE_VALUE (arg_types
);
528 if (!acceptable_java_type (type
))
530 if (type
!= error_mark_node
)
531 error ("Java method %qD has non-Java parameter type %qT",
539 /* Sanity check: report error if this function FUNCTION is not
540 really a member of the class (CTYPE) it is supposed to belong to.
541 TEMPLATE_PARMS is used to specify the template parameters of a member
542 template passed as FUNCTION_DECL. If the member template is passed as a
543 TEMPLATE_DECL, it can be NULL since the parameters can be extracted
544 from the declaration. If the function is not a function template, it
546 It returns the original declaration for the function, NULL_TREE if
547 no declaration was found, error_mark_node if an error was emitted. */
550 check_classfn (tree ctype
, tree function
, tree template_parms
)
556 if (DECL_USE_TEMPLATE (function
)
557 && !(TREE_CODE (function
) == TEMPLATE_DECL
558 && DECL_TEMPLATE_SPECIALIZATION (function
))
559 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (function
)))
560 /* Since this is a specialization of a member template,
561 we're not going to find the declaration in the class.
564 struct S { template <typename T> void f(T); };
565 template <> void S::f(int);
567 we're not going to find `S::f(int)', but there's no
568 reason we should, either. We let our callers know we didn't
569 find the method, but we don't complain. */
572 /* Basic sanity check: for a template function, the template parameters
573 either were not passed, or they are the same of DECL_TEMPLATE_PARMS. */
574 if (TREE_CODE (function
) == TEMPLATE_DECL
)
577 && !comp_template_parms (template_parms
,
578 DECL_TEMPLATE_PARMS (function
)))
580 error ("template parameter lists provided don't match the "
581 "template parameters of %qD", function
);
582 return error_mark_node
;
584 template_parms
= DECL_TEMPLATE_PARMS (function
);
587 /* OK, is this a definition of a member template? */
588 is_template
= (template_parms
!= NULL_TREE
);
590 /* We must enter the scope here, because conversion operators are
591 named by target type, and type equivalence relies on typenames
592 resolving within the scope of CTYPE. */
593 pushed_scope
= push_scope (ctype
);
594 ix
= class_method_index_for_fn (complete_type (ctype
), function
);
597 VEC(tree
,gc
) *methods
= CLASSTYPE_METHOD_VEC (ctype
);
598 tree fndecls
, fndecl
= 0;
600 const char *format
= NULL
;
602 for (fndecls
= VEC_index (tree
, methods
, ix
);
603 fndecls
; fndecls
= OVL_NEXT (fndecls
))
607 fndecl
= OVL_CURRENT (fndecls
);
608 p1
= TYPE_ARG_TYPES (TREE_TYPE (function
));
609 p2
= TYPE_ARG_TYPES (TREE_TYPE (fndecl
));
611 /* We cannot simply call decls_match because this doesn't
612 work for static member functions that are pretending to
613 be methods, and because the name may have been changed by
616 /* Get rid of the this parameter on functions that become
618 if (DECL_STATIC_FUNCTION_P (fndecl
)
619 && TREE_CODE (TREE_TYPE (function
)) == METHOD_TYPE
)
620 p1
= TREE_CHAIN (p1
);
622 /* A member template definition only matches a member template
624 if (is_template
!= (TREE_CODE (fndecl
) == TEMPLATE_DECL
))
627 if (same_type_p (TREE_TYPE (TREE_TYPE (function
)),
628 TREE_TYPE (TREE_TYPE (fndecl
)))
629 && compparms (p1
, p2
)
631 || comp_template_parms (template_parms
,
632 DECL_TEMPLATE_PARMS (fndecl
)))
633 && (DECL_TEMPLATE_SPECIALIZATION (function
)
634 == DECL_TEMPLATE_SPECIALIZATION (fndecl
))
635 && (!DECL_TEMPLATE_SPECIALIZATION (function
)
636 || (DECL_TI_TEMPLATE (function
)
637 == DECL_TI_TEMPLATE (fndecl
))))
643 pop_scope (pushed_scope
);
644 return OVL_CURRENT (fndecls
);
647 error_at (DECL_SOURCE_LOCATION (function
),
648 "prototype for %q#D does not match any in class %qT",
650 is_conv_op
= DECL_CONV_FN_P (fndecl
);
653 ix
= CLASSTYPE_FIRST_CONVERSION_SLOT
;
654 fndecls
= VEC_index (tree
, methods
, ix
);
657 fndecl
= OVL_CURRENT (fndecls
);
658 fndecls
= OVL_NEXT (fndecls
);
660 if (!fndecls
&& is_conv_op
)
662 if (VEC_length (tree
, methods
) > (size_t) ++ix
)
664 fndecls
= VEC_index (tree
, methods
, ix
);
665 if (!DECL_CONV_FN_P (OVL_CURRENT (fndecls
)))
677 format
= N_("candidates are: %+#D");
679 format
= N_("candidate is: %+#D");
680 error (format
, fndecl
);
683 else if (!COMPLETE_TYPE_P (ctype
))
684 cxx_incomplete_type_error (function
, ctype
);
686 error ("no %q#D member function declared in class %qT",
690 pop_scope (pushed_scope
);
691 return error_mark_node
;
694 /* DECL is a function with vague linkage. Remember it so that at the
695 end of the translation unit we can decide whether or not to emit
699 note_vague_linkage_fn (tree decl
)
701 if (!DECL_DEFERRED_FN (decl
))
703 DECL_DEFERRED_FN (decl
) = 1;
704 DECL_DEFER_OUTPUT (decl
) = 1;
705 VEC_safe_push (tree
, gc
, deferred_fns
, decl
);
709 /* We have just processed the DECL, which is a static data member.
710 The other parameters are as for cp_finish_decl. */
713 finish_static_data_member_decl (tree decl
,
714 tree init
, bool init_const_expr_p
,
718 DECL_CONTEXT (decl
) = current_class_type
;
720 /* We cannot call pushdecl here, because that would fill in the
721 TREE_CHAIN of our decl. Instead, we modify cp_finish_decl to do
722 the right thing, namely, to put this decl out straight away. */
724 if (! processing_template_decl
)
725 VEC_safe_push (tree
, gc
, pending_statics
, decl
);
727 if (LOCAL_CLASS_P (current_class_type
))
728 permerror (input_location
, "local class %q#T shall not have static data member %q#D",
729 current_class_type
, decl
);
731 /* Static consts need not be initialized in the class definition. */
732 if (init
!= NULL_TREE
&& TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl
)))
734 static int explained
= 0;
736 error ("initializer invalid for static member with constructor");
739 error ("(an out of class initialization is required)");
744 /* Force the compiler to know when an uninitialized static const
745 member is being used. */
746 if (CP_TYPE_CONST_P (TREE_TYPE (decl
)) && init
== 0)
747 TREE_USED (decl
) = 1;
748 DECL_INITIAL (decl
) = init
;
749 DECL_IN_AGGR_P (decl
) = 1;
751 cp_finish_decl (decl
, init
, init_const_expr_p
, asmspec_tree
, flags
);
754 /* DECLARATOR and DECLSPECS correspond to a class member. The other
755 parameters are as for cp_finish_decl. Return the DECL for the
756 class member declared. */
759 grokfield (const cp_declarator
*declarator
,
760 cp_decl_specifier_seq
*declspecs
,
761 tree init
, bool init_const_expr_p
,
766 const char *asmspec
= 0;
767 int flags
= LOOKUP_ONLYCONVERTING
;
770 && TREE_CODE (init
) == TREE_LIST
771 && TREE_VALUE (init
) == error_mark_node
772 && TREE_CHAIN (init
) == NULL_TREE
)
775 value
= grokdeclarator (declarator
, declspecs
, FIELD
, init
!= 0, &attrlist
);
776 if (! value
|| error_operand_p (value
))
777 /* friend or constructor went bad. */
778 return error_mark_node
;
780 if (TREE_CODE (value
) == TYPE_DECL
&& init
)
782 error ("typedef %qD is initialized (use __typeof__ instead)", value
);
786 /* Pass friendly classes back. */
787 if (value
== void_type_node
)
790 /* Pass friend decls back. */
791 if ((TREE_CODE (value
) == FUNCTION_DECL
792 || TREE_CODE (value
) == TEMPLATE_DECL
)
793 && DECL_CONTEXT (value
) != current_class_type
)
796 if (DECL_NAME (value
) != NULL_TREE
797 && IDENTIFIER_POINTER (DECL_NAME (value
))[0] == '_'
798 && ! strcmp (IDENTIFIER_POINTER (DECL_NAME (value
)), "_vptr"))
799 error ("member %qD conflicts with virtual function table field name",
802 /* Stash away type declarations. */
803 if (TREE_CODE (value
) == TYPE_DECL
)
805 DECL_NONLOCAL (value
) = 1;
806 DECL_CONTEXT (value
) = current_class_type
;
808 if (processing_template_decl
)
809 value
= push_template_decl (value
);
815 /* If this is a typedef that names the class for linkage purposes
816 (7.1.3p8), apply any attributes directly to the type. */
817 if (TAGGED_TYPE_P (TREE_TYPE (value
))
818 && value
== TYPE_NAME (TYPE_MAIN_VARIANT (TREE_TYPE (value
))))
819 attrflags
= ATTR_FLAG_TYPE_IN_PLACE
;
821 cplus_decl_attributes (&value
, attrlist
, attrflags
);
824 if (declspecs
->specs
[(int)ds_typedef
])
825 set_underlying_type (value
);
830 if (DECL_IN_AGGR_P (value
))
832 error ("%qD is already defined in %qT", value
, DECL_CONTEXT (value
));
833 return void_type_node
;
836 if (asmspec_tree
&& asmspec_tree
!= error_mark_node
)
837 asmspec
= TREE_STRING_POINTER (asmspec_tree
);
841 if (TREE_CODE (value
) == FUNCTION_DECL
)
843 /* Initializers for functions are rejected early in the parser.
844 If we get here, it must be a pure specifier for a method. */
845 if (init
== ridpointers
[(int)RID_DELETE
])
847 DECL_DELETED_FN (value
) = 1;
848 DECL_DECLARED_INLINE_P (value
) = 1;
849 DECL_INITIAL (value
) = error_mark_node
;
851 else if (init
== ridpointers
[(int)RID_DEFAULT
])
853 if (!defaultable_fn_p (value
))
854 error ("%qD cannot be defaulted", value
);
857 DECL_DEFAULTED_FN (value
) = 1;
858 DECL_INITIALIZED_IN_CLASS_P (value
) = 1;
859 DECL_DECLARED_INLINE_P (value
) = 1;
862 else if (TREE_CODE (TREE_TYPE (value
)) == METHOD_TYPE
)
864 gcc_assert (error_operand_p (init
) || integer_zerop (init
));
865 DECL_PURE_VIRTUAL_P (value
) = 1;
869 gcc_assert (TREE_CODE (TREE_TYPE (value
)) == FUNCTION_TYPE
);
870 error ("initializer specified for static member function %qD",
874 else if (pedantic
&& TREE_CODE (value
) != VAR_DECL
)
875 /* Already complained in grokdeclarator. */
877 else if (!processing_template_decl
)
879 if (TREE_CODE (init
) == CONSTRUCTOR
)
880 init
= digest_init (TREE_TYPE (value
), init
);
882 init
= integral_constant_value (init
);
884 if (init
!= error_mark_node
&& !TREE_CONSTANT (init
))
886 /* We can allow references to things that are effectively
887 static, since references are initialized with the
889 if (TREE_CODE (TREE_TYPE (value
)) != REFERENCE_TYPE
890 || (TREE_STATIC (init
) == 0
891 && (!DECL_P (init
) || DECL_EXTERNAL (init
) == 0)))
893 error ("field initializer is not constant");
894 init
= error_mark_node
;
900 if (processing_template_decl
901 && (TREE_CODE (value
) == VAR_DECL
|| TREE_CODE (value
) == FUNCTION_DECL
))
903 value
= push_template_decl (value
);
904 if (error_operand_p (value
))
905 return error_mark_node
;
909 cplus_decl_attributes (&value
, attrlist
, 0);
911 switch (TREE_CODE (value
))
914 finish_static_data_member_decl (value
, init
, init_const_expr_p
,
915 asmspec_tree
, flags
);
920 error ("%<asm%> specifiers are not permitted on non-static data members");
921 if (DECL_INITIAL (value
) == error_mark_node
)
922 init
= error_mark_node
;
923 cp_finish_decl (value
, init
, /*init_const_expr_p=*/false,
925 DECL_INITIAL (value
) = init
;
926 DECL_IN_AGGR_P (value
) = 1;
931 set_user_assembler_name (value
, asmspec
);
933 cp_finish_decl (value
,
935 /*init_const_expr_p=*/false,
936 asmspec_tree
, flags
);
938 /* Pass friends back this way. */
939 if (DECL_FRIEND_P (value
))
940 return void_type_node
;
942 DECL_IN_AGGR_P (value
) = 1;
951 /* Like `grokfield', but for bitfields.
952 WIDTH is non-NULL for bit fields only, and is an INTEGER_CST node. */
955 grokbitfield (const cp_declarator
*declarator
,
956 cp_decl_specifier_seq
*declspecs
, tree width
,
959 tree value
= grokdeclarator (declarator
, declspecs
, BITFIELD
, 0, &attrlist
);
961 if (value
== error_mark_node
)
962 return NULL_TREE
; /* friends went bad. */
964 /* Pass friendly classes back. */
965 if (TREE_CODE (value
) == VOID_TYPE
)
966 return void_type_node
;
968 if (!INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (TREE_TYPE (value
))
969 && (POINTER_TYPE_P (value
)
970 || !dependent_type_p (TREE_TYPE (value
))))
972 error ("bit-field %qD with non-integral type", value
);
973 return error_mark_node
;
976 if (TREE_CODE (value
) == TYPE_DECL
)
978 error ("cannot declare %qD to be a bit-field type", value
);
982 /* Usually, finish_struct_1 catches bitfields with invalid types.
983 But, in the case of bitfields with function type, we confuse
984 ourselves into thinking they are member functions, so we must
986 if (TREE_CODE (value
) == FUNCTION_DECL
)
988 error ("cannot declare bit-field %qD with function type",
993 if (DECL_IN_AGGR_P (value
))
995 error ("%qD is already defined in the class %qT", value
,
996 DECL_CONTEXT (value
));
997 return void_type_node
;
1000 if (TREE_STATIC (value
))
1002 error ("static member %qD cannot be a bit-field", value
);
1005 cp_finish_decl (value
, NULL_TREE
, false, NULL_TREE
, 0);
1007 if (width
!= error_mark_node
)
1009 constant_expression_warning (width
);
1010 DECL_INITIAL (value
) = width
;
1011 SET_DECL_C_BIT_FIELD (value
);
1014 DECL_IN_AGGR_P (value
) = 1;
1017 cplus_decl_attributes (&value
, attrlist
, /*flags=*/0);
1023 /* Returns true iff ATTR is an attribute which needs to be applied at
1024 instantiation time rather than template definition time. */
1027 is_late_template_attribute (tree attr
, tree decl
)
1029 tree name
= TREE_PURPOSE (attr
);
1030 tree args
= TREE_VALUE (attr
);
1031 const struct attribute_spec
*spec
= lookup_attribute_spec (name
);
1035 /* Unknown attribute. */
1038 /* Attribute weak handling wants to write out assembly right away. */
1039 if (is_attribute_p ("weak", name
))
1042 /* If any of the arguments are dependent expressions, we can't evaluate
1043 the attribute until instantiation time. */
1044 for (arg
= args
; arg
; arg
= TREE_CHAIN (arg
))
1046 tree t
= TREE_VALUE (arg
);
1048 /* If the first attribute argument is an identifier, only consider
1049 second and following arguments. Attributes like mode, format,
1050 cleanup and several target specific attributes aren't late
1051 just because they have an IDENTIFIER_NODE as first argument. */
1052 if (arg
== args
&& TREE_CODE (t
) == IDENTIFIER_NODE
)
1055 if (value_dependent_expression_p (t
)
1056 || type_dependent_expression_p (t
))
1060 if (TREE_CODE (decl
) == TYPE_DECL
1062 || spec
->type_required
)
1064 tree type
= TYPE_P (decl
) ? decl
: TREE_TYPE (decl
);
1066 /* We can't apply any attributes to a completely unknown type until
1067 instantiation time. */
1068 enum tree_code code
= TREE_CODE (type
);
1069 if (code
== TEMPLATE_TYPE_PARM
1070 || code
== BOUND_TEMPLATE_TEMPLATE_PARM
1071 || code
== TYPENAME_TYPE
)
1073 /* Also defer most attributes on dependent types. This is not
1074 necessary in all cases, but is the better default. */
1075 else if (dependent_type_p (type
)
1076 /* But attribute visibility specifically works on
1078 && !is_attribute_p ("visibility", name
))
1087 /* ATTR_P is a list of attributes. Remove any attributes which need to be
1088 applied at instantiation time and return them. If IS_DEPENDENT is true,
1089 the declaration itself is dependent, so all attributes should be applied
1090 at instantiation time. */
1093 splice_template_attributes (tree
*attr_p
, tree decl
)
1096 tree late_attrs
= NULL_TREE
;
1097 tree
*q
= &late_attrs
;
1104 if (is_late_template_attribute (*p
, decl
))
1106 ATTR_IS_DEPENDENT (*p
) = 1;
1108 *p
= TREE_CHAIN (*p
);
1109 q
= &TREE_CHAIN (*q
);
1113 p
= &TREE_CHAIN (*p
);
1119 /* Remove any late attributes from the list in ATTR_P and attach them to
1123 save_template_attributes (tree
*attr_p
, tree
*decl_p
)
1125 tree late_attrs
= splice_template_attributes (attr_p
, *decl_p
);
1127 tree old_attrs
= NULL_TREE
;
1132 if (DECL_P (*decl_p
))
1133 q
= &DECL_ATTRIBUTES (*decl_p
);
1135 q
= &TYPE_ATTRIBUTES (*decl_p
);
1139 /* Place the late attributes at the beginning of the attribute
1141 TREE_CHAIN (tree_last (late_attrs
)) = *q
;
1144 if (!DECL_P (*decl_p
) && *decl_p
== TYPE_MAIN_VARIANT (*decl_p
))
1146 /* We've added new attributes directly to the main variant, so
1147 now we need to update all of the other variants to include
1148 these new attributes. */
1150 for (variant
= TYPE_NEXT_VARIANT (*decl_p
); variant
;
1151 variant
= TYPE_NEXT_VARIANT (variant
))
1153 gcc_assert (TYPE_ATTRIBUTES (variant
) == old_attrs
);
1154 TYPE_ATTRIBUTES (variant
) = TYPE_ATTRIBUTES (*decl_p
);
1159 /* Like reconstruct_complex_type, but handle also template trees. */
1162 cp_reconstruct_complex_type (tree type
, tree bottom
)
1166 if (TREE_CODE (type
) == POINTER_TYPE
)
1168 inner
= cp_reconstruct_complex_type (TREE_TYPE (type
), bottom
);
1169 outer
= build_pointer_type_for_mode (inner
, TYPE_MODE (type
),
1170 TYPE_REF_CAN_ALIAS_ALL (type
));
1172 else if (TREE_CODE (type
) == REFERENCE_TYPE
)
1174 inner
= cp_reconstruct_complex_type (TREE_TYPE (type
), bottom
);
1175 outer
= build_reference_type_for_mode (inner
, TYPE_MODE (type
),
1176 TYPE_REF_CAN_ALIAS_ALL (type
));
1178 else if (TREE_CODE (type
) == ARRAY_TYPE
)
1180 inner
= cp_reconstruct_complex_type (TREE_TYPE (type
), bottom
);
1181 outer
= build_cplus_array_type (inner
, TYPE_DOMAIN (type
));
1182 /* Don't call cp_build_qualified_type on ARRAY_TYPEs, the
1183 element type qualification will be handled by the recursive
1184 cp_reconstruct_complex_type call and cp_build_qualified_type
1185 for ARRAY_TYPEs changes the element type. */
1188 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
1190 inner
= cp_reconstruct_complex_type (TREE_TYPE (type
), bottom
);
1191 outer
= build_function_type (inner
, TYPE_ARG_TYPES (type
));
1193 else if (TREE_CODE (type
) == METHOD_TYPE
)
1195 inner
= cp_reconstruct_complex_type (TREE_TYPE (type
), bottom
);
1196 /* The build_method_type_directly() routine prepends 'this' to argument list,
1197 so we must compensate by getting rid of it. */
1199 = build_method_type_directly
1200 (TREE_TYPE (TREE_VALUE (TYPE_ARG_TYPES (type
))),
1202 TREE_CHAIN (TYPE_ARG_TYPES (type
)));
1204 else if (TREE_CODE (type
) == OFFSET_TYPE
)
1206 inner
= cp_reconstruct_complex_type (TREE_TYPE (type
), bottom
);
1207 outer
= build_offset_type (TYPE_OFFSET_BASETYPE (type
), inner
);
1212 return cp_build_qualified_type (outer
, TYPE_QUALS (type
));
1215 /* Like decl_attributes, but handle C++ complexity. */
1218 cplus_decl_attributes (tree
*decl
, tree attributes
, int flags
)
1220 if (*decl
== NULL_TREE
|| *decl
== void_type_node
1221 || *decl
== error_mark_node
1222 || attributes
== NULL_TREE
)
1225 if (processing_template_decl
)
1227 if (check_for_bare_parameter_packs (attributes
))
1230 save_template_attributes (&attributes
, decl
);
1231 if (attributes
== NULL_TREE
)
1235 if (TREE_CODE (*decl
) == TEMPLATE_DECL
)
1236 decl
= &DECL_TEMPLATE_RESULT (*decl
);
1238 decl_attributes (decl
, attributes
, flags
);
1240 if (TREE_CODE (*decl
) == TYPE_DECL
)
1241 SET_IDENTIFIER_TYPE_VALUE (DECL_NAME (*decl
), TREE_TYPE (*decl
));
1244 /* Walks through the namespace- or function-scope anonymous union
1245 OBJECT, with the indicated TYPE, building appropriate VAR_DECLs.
1246 Returns one of the fields for use in the mangled name. */
1249 build_anon_union_vars (tree type
, tree object
)
1251 tree main_decl
= NULL_TREE
;
1254 /* Rather than write the code to handle the non-union case,
1255 just give an error. */
1256 if (TREE_CODE (type
) != UNION_TYPE
)
1257 error ("anonymous struct not inside named type");
1259 for (field
= TYPE_FIELDS (type
);
1261 field
= TREE_CHAIN (field
))
1266 if (DECL_ARTIFICIAL (field
))
1268 if (TREE_CODE (field
) != FIELD_DECL
)
1270 permerror (input_location
, "%q+#D invalid; an anonymous union can only "
1271 "have non-static data members", field
);
1275 if (TREE_PRIVATE (field
))
1276 permerror (input_location
, "private member %q+#D in anonymous union", field
);
1277 else if (TREE_PROTECTED (field
))
1278 permerror (input_location
, "protected member %q+#D in anonymous union", field
);
1280 if (processing_template_decl
)
1281 ref
= build_min_nt (COMPONENT_REF
, object
,
1282 DECL_NAME (field
), NULL_TREE
);
1284 ref
= build_class_member_access_expr (object
, field
, NULL_TREE
,
1285 false, tf_warning_or_error
);
1287 if (DECL_NAME (field
))
1291 decl
= build_decl (input_location
,
1292 VAR_DECL
, DECL_NAME (field
), TREE_TYPE (field
));
1293 DECL_ANON_UNION_VAR_P (decl
) = 1;
1295 base
= get_base_address (object
);
1296 TREE_PUBLIC (decl
) = TREE_PUBLIC (base
);
1297 TREE_STATIC (decl
) = TREE_STATIC (base
);
1298 DECL_EXTERNAL (decl
) = DECL_EXTERNAL (base
);
1300 SET_DECL_VALUE_EXPR (decl
, ref
);
1301 DECL_HAS_VALUE_EXPR_P (decl
) = 1;
1303 decl
= pushdecl (decl
);
1305 else if (ANON_AGGR_TYPE_P (TREE_TYPE (field
)))
1306 decl
= build_anon_union_vars (TREE_TYPE (field
), ref
);
1310 if (main_decl
== NULL_TREE
)
1317 /* Finish off the processing of a UNION_TYPE structure. If the union is an
1318 anonymous union, then all members must be laid out together. PUBLIC_P
1319 is nonzero if this union is not declared static. */
1322 finish_anon_union (tree anon_union_decl
)
1328 if (anon_union_decl
== error_mark_node
)
1331 type
= TREE_TYPE (anon_union_decl
);
1332 public_p
= TREE_PUBLIC (anon_union_decl
);
1334 /* The VAR_DECL's context is the same as the TYPE's context. */
1335 DECL_CONTEXT (anon_union_decl
) = DECL_CONTEXT (TYPE_NAME (type
));
1337 if (TYPE_FIELDS (type
) == NULL_TREE
)
1342 error ("namespace-scope anonymous aggregates must be static");
1346 main_decl
= build_anon_union_vars (type
, anon_union_decl
);
1347 if (main_decl
== error_mark_node
)
1349 if (main_decl
== NULL_TREE
)
1351 warning (0, "anonymous union with no members");
1355 if (!processing_template_decl
)
1357 /* Use main_decl to set the mangled name. */
1358 DECL_NAME (anon_union_decl
) = DECL_NAME (main_decl
);
1359 maybe_commonize_var (anon_union_decl
);
1360 mangle_decl (anon_union_decl
);
1361 DECL_NAME (anon_union_decl
) = NULL_TREE
;
1364 pushdecl (anon_union_decl
);
1365 if (building_stmt_tree ()
1366 && at_function_scope_p ())
1367 add_decl_expr (anon_union_decl
);
1368 else if (!processing_template_decl
)
1369 rest_of_decl_compilation (anon_union_decl
,
1370 toplevel_bindings_p (), at_eof
);
1373 /* Auxiliary functions to make type signatures for
1374 `operator new' and `operator delete' correspond to
1375 what compiler will be expecting. */
1378 coerce_new_type (tree type
)
1381 tree args
= TYPE_ARG_TYPES (type
);
1383 gcc_assert (TREE_CODE (type
) == FUNCTION_TYPE
);
1385 if (!same_type_p (TREE_TYPE (type
), ptr_type_node
))
1388 error ("%<operator new%> must return type %qT", ptr_type_node
);
1391 if (args
&& args
!= void_list_node
)
1393 if (TREE_PURPOSE (args
))
1395 /* [basic.stc.dynamic.allocation]
1397 The first parameter shall not have an associated default
1399 error ("the first parameter of %<operator new%> cannot "
1400 "have a default argument");
1401 /* Throw away the default argument. */
1402 TREE_PURPOSE (args
) = NULL_TREE
;
1405 if (!same_type_p (TREE_VALUE (args
), size_type_node
))
1408 args
= TREE_CHAIN (args
);
1415 permerror (input_location
, "%<operator new%> takes type %<size_t%> (%qT) "
1416 "as first parameter", size_type_node
);
1421 args
= tree_cons (NULL_TREE
, size_type_node
, args
);
1424 type
= build_exception_variant
1425 (build_function_type (ptr_type_node
, args
),
1426 TYPE_RAISES_EXCEPTIONS (type
));
1434 coerce_delete_type (tree type
)
1437 tree args
= TYPE_ARG_TYPES (type
);
1439 gcc_assert (TREE_CODE (type
) == FUNCTION_TYPE
);
1441 if (!same_type_p (TREE_TYPE (type
), void_type_node
))
1444 error ("%<operator delete%> must return type %qT", void_type_node
);
1447 if (!args
|| args
== void_list_node
1448 || !same_type_p (TREE_VALUE (args
), ptr_type_node
))
1451 if (args
&& args
!= void_list_node
)
1452 args
= TREE_CHAIN (args
);
1453 error ("%<operator delete%> takes type %qT as first parameter",
1459 args
= tree_cons (NULL_TREE
, ptr_type_node
, args
);
1462 type
= build_exception_variant
1463 (build_function_type (void_type_node
, args
),
1464 TYPE_RAISES_EXCEPTIONS (type
));
1472 /* DECL is a VAR_DECL for a vtable: walk through the entries in the vtable
1473 and mark them as needed. */
1476 mark_vtable_entries (tree decl
)
1479 unsigned HOST_WIDE_INT idx
;
1481 FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (DECL_INITIAL (decl
)),
1486 STRIP_NOPS (fnaddr
);
1488 if (TREE_CODE (fnaddr
) != ADDR_EXPR
1489 && TREE_CODE (fnaddr
) != FDESC_EXPR
)
1490 /* This entry is an offset: a virtual base class offset, a
1491 virtual call offset, an RTTI offset, etc. */
1494 fn
= TREE_OPERAND (fnaddr
, 0);
1495 TREE_ADDRESSABLE (fn
) = 1;
1496 /* When we don't have vcall offsets, we output thunks whenever
1497 we output the vtables that contain them. With vcall offsets,
1498 we know all the thunks we'll need when we emit a virtual
1499 function, so we emit the thunks there instead. */
1500 if (DECL_THUNK_P (fn
))
1501 use_thunk (fn
, /*emit_p=*/0);
1506 /* Set DECL up to have the closest approximation of "initialized common"
1507 linkage available. */
1510 comdat_linkage (tree decl
)
1513 make_decl_one_only (decl
, cxx_comdat_group (decl
));
1514 else if (TREE_CODE (decl
) == FUNCTION_DECL
1515 || (TREE_CODE (decl
) == VAR_DECL
&& DECL_ARTIFICIAL (decl
)))
1516 /* We can just emit function and compiler-generated variables
1517 statically; having multiple copies is (for the most part) only
1520 There are two correctness issues, however: the address of a
1521 template instantiation with external linkage should be the
1522 same, independent of what translation unit asks for the
1523 address, and this will not hold when we emit multiple copies of
1524 the function. However, there's little else we can do.
1526 Also, by default, the typeinfo implementation assumes that
1527 there will be only one copy of the string used as the name for
1528 each type. Therefore, if weak symbols are unavailable, the
1529 run-time library should perform a more conservative check; it
1530 should perform a string comparison, rather than an address
1532 TREE_PUBLIC (decl
) = 0;
1535 /* Static data member template instantiations, however, cannot
1536 have multiple copies. */
1537 if (DECL_INITIAL (decl
) == 0
1538 || DECL_INITIAL (decl
) == error_mark_node
)
1539 DECL_COMMON (decl
) = 1;
1540 else if (EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl
)))
1542 DECL_COMMON (decl
) = 1;
1543 DECL_INITIAL (decl
) = error_mark_node
;
1545 else if (!DECL_EXPLICIT_INSTANTIATION (decl
))
1547 /* We can't do anything useful; leave vars for explicit
1549 DECL_EXTERNAL (decl
) = 1;
1550 DECL_NOT_REALLY_EXTERN (decl
) = 0;
1554 if (DECL_LANG_SPECIFIC (decl
))
1555 DECL_COMDAT (decl
) = 1;
1558 /* For win32 we also want to put explicit instantiations in
1559 linkonce sections, so that they will be merged with implicit
1560 instantiations; otherwise we get duplicate symbol errors.
1561 For Darwin we do not want explicit instantiations to be
1565 maybe_make_one_only (tree decl
)
1567 /* We used to say that this was not necessary on targets that support weak
1568 symbols, because the implicit instantiations will defer to the explicit
1569 one. However, that's not actually the case in SVR4; a strong definition
1570 after a weak one is an error. Also, not making explicit
1571 instantiations one_only means that we can end up with two copies of
1572 some template instantiations. */
1576 /* We can't set DECL_COMDAT on functions, or cp_finish_file will think
1577 we can get away with not emitting them if they aren't used. We need
1578 to for variables so that cp_finish_decl will update their linkage,
1579 because their DECL_INITIAL may not have been set properly yet. */
1581 if (!TARGET_WEAK_NOT_IN_ARCHIVE_TOC
1582 || (! DECL_EXPLICIT_INSTANTIATION (decl
)
1583 && ! DECL_TEMPLATE_SPECIALIZATION (decl
)))
1585 make_decl_one_only (decl
, cxx_comdat_group (decl
));
1587 if (TREE_CODE (decl
) == VAR_DECL
)
1589 DECL_COMDAT (decl
) = 1;
1590 /* Mark it needed so we don't forget to emit it. */
1591 mark_decl_referenced (decl
);
1596 /* Determine whether or not we want to specifically import or export CTYPE,
1597 using various heuristics. */
1600 import_export_class (tree ctype
)
1602 /* -1 for imported, 1 for exported. */
1603 int import_export
= 0;
1605 /* It only makes sense to call this function at EOF. The reason is
1606 that this function looks at whether or not the first non-inline
1607 non-abstract virtual member function has been defined in this
1608 translation unit. But, we can't possibly know that until we've
1609 seen the entire translation unit. */
1610 gcc_assert (at_eof
);
1612 if (CLASSTYPE_INTERFACE_KNOWN (ctype
))
1615 /* If MULTIPLE_SYMBOL_SPACES is set and we saw a #pragma interface,
1616 we will have CLASSTYPE_INTERFACE_ONLY set but not
1617 CLASSTYPE_INTERFACE_KNOWN. In that case, we don't want to use this
1618 heuristic because someone will supply a #pragma implementation
1619 elsewhere, and deducing it here would produce a conflict. */
1620 if (CLASSTYPE_INTERFACE_ONLY (ctype
))
1623 if (lookup_attribute ("dllimport", TYPE_ATTRIBUTES (ctype
)))
1625 else if (lookup_attribute ("dllexport", TYPE_ATTRIBUTES (ctype
)))
1627 else if (CLASSTYPE_IMPLICIT_INSTANTIATION (ctype
)
1628 && !flag_implicit_templates
)
1629 /* For a template class, without -fimplicit-templates, check the
1630 repository. If the virtual table is assigned to this
1631 translation unit, then export the class; otherwise, import
1633 import_export
= repo_export_class_p (ctype
) ? 1 : -1;
1634 else if (TYPE_POLYMORPHIC_P (ctype
))
1636 /* The ABI specifies that the virtual table and associated
1637 information are emitted with the key method, if any. */
1638 tree method
= CLASSTYPE_KEY_METHOD (ctype
);
1639 /* If weak symbol support is not available, then we must be
1640 careful not to emit the vtable when the key function is
1641 inline. An inline function can be defined in multiple
1642 translation units. If we were to emit the vtable in each
1643 translation unit containing a definition, we would get
1644 multiple definition errors at link-time. */
1645 if (method
&& (flag_weak
|| ! DECL_DECLARED_INLINE_P (method
)))
1646 import_export
= (DECL_REALLY_EXTERN (method
) ? -1 : 1);
1649 /* When MULTIPLE_SYMBOL_SPACES is set, we cannot count on seeing
1650 a definition anywhere else. */
1651 if (MULTIPLE_SYMBOL_SPACES
&& import_export
== -1)
1654 /* Allow back ends the chance to overrule the decision. */
1655 if (targetm
.cxx
.import_export_class
)
1656 import_export
= targetm
.cxx
.import_export_class (ctype
, import_export
);
1660 SET_CLASSTYPE_INTERFACE_KNOWN (ctype
);
1661 CLASSTYPE_INTERFACE_ONLY (ctype
) = (import_export
< 0);
1665 /* Return true if VAR has already been provided to the back end; in that
1666 case VAR should not be modified further by the front end. */
1668 var_finalized_p (tree var
)
1670 return varpool_node (var
)->finalized
;
1673 /* DECL is a VAR_DECL or FUNCTION_DECL which, for whatever reason,
1674 must be emitted in this translation unit. Mark it as such. */
1677 mark_needed (tree decl
)
1679 /* It's possible that we no longer need to set
1680 TREE_SYMBOL_REFERENCED here directly, but doing so is
1682 TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl
)) = 1;
1683 mark_decl_referenced (decl
);
1686 /* DECL is either a FUNCTION_DECL or a VAR_DECL. This function
1687 returns true if a definition of this entity should be provided in
1688 this object file. Callers use this function to determine whether
1689 or not to let the back end know that a definition of DECL is
1690 available in this translation unit. */
1693 decl_needed_p (tree decl
)
1695 gcc_assert (TREE_CODE (decl
) == VAR_DECL
1696 || TREE_CODE (decl
) == FUNCTION_DECL
);
1697 /* This function should only be called at the end of the translation
1698 unit. We cannot be sure of whether or not something will be
1699 COMDAT until that point. */
1700 gcc_assert (at_eof
);
1702 /* All entities with external linkage that are not COMDAT should be
1703 emitted; they may be referred to from other object files. */
1704 if (TREE_PUBLIC (decl
) && !DECL_COMDAT (decl
))
1706 /* If this entity was used, let the back end see it; it will decide
1707 whether or not to emit it into the object file. */
1708 if (TREE_USED (decl
)
1709 || (DECL_ASSEMBLER_NAME_SET_P (decl
)
1710 && TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl
))))
1712 /* Functions marked "dllexport" must be emitted so that they are
1713 visible to other DLLs. */
1714 if (lookup_attribute ("dllexport", DECL_ATTRIBUTES (decl
)))
1716 /* Otherwise, DECL does not need to be emitted -- yet. A subsequent
1717 reference to DECL might cause it to be emitted later. */
1721 /* If necessary, write out the vtables for the dynamic class CTYPE.
1722 Returns true if any vtables were emitted. */
1725 maybe_emit_vtables (tree ctype
)
1731 /* If the vtables for this class have already been emitted there is
1732 nothing more to do. */
1733 primary_vtbl
= CLASSTYPE_VTABLES (ctype
);
1734 if (var_finalized_p (primary_vtbl
))
1736 /* Ignore dummy vtables made by get_vtable_decl. */
1737 if (TREE_TYPE (primary_vtbl
) == void_type_node
)
1740 /* On some targets, we cannot determine the key method until the end
1741 of the translation unit -- which is when this function is
1743 if (!targetm
.cxx
.key_method_may_be_inline ())
1744 determine_key_method (ctype
);
1746 /* See if any of the vtables are needed. */
1747 for (vtbl
= CLASSTYPE_VTABLES (ctype
); vtbl
; vtbl
= TREE_CHAIN (vtbl
))
1749 import_export_decl (vtbl
);
1750 if (DECL_NOT_REALLY_EXTERN (vtbl
) && decl_needed_p (vtbl
))
1755 /* If the references to this class' vtables are optimized away,
1756 still emit the appropriate debugging information. See
1758 if (DECL_COMDAT (primary_vtbl
)
1759 && CLASSTYPE_DEBUG_REQUESTED (ctype
))
1760 note_debug_info_needed (ctype
);
1764 /* The ABI requires that we emit all of the vtables if we emit any
1766 for (vtbl
= CLASSTYPE_VTABLES (ctype
); vtbl
; vtbl
= TREE_CHAIN (vtbl
))
1768 /* Mark entities references from the virtual table as used. */
1769 mark_vtable_entries (vtbl
);
1771 if (TREE_TYPE (DECL_INITIAL (vtbl
)) == 0)
1773 tree expr
= store_init_value (vtbl
, DECL_INITIAL (vtbl
), LOOKUP_NORMAL
);
1775 /* It had better be all done at compile-time. */
1780 DECL_EXTERNAL (vtbl
) = 0;
1781 rest_of_decl_compilation (vtbl
, 1, 1);
1783 /* Because we're only doing syntax-checking, we'll never end up
1784 actually marking the variable as written. */
1785 if (flag_syntax_only
)
1786 TREE_ASM_WRITTEN (vtbl
) = 1;
1789 /* Since we're writing out the vtable here, also write the debug
1791 note_debug_info_needed (ctype
);
1796 /* A special return value from type_visibility meaning internal
1799 enum { VISIBILITY_ANON
= VISIBILITY_INTERNAL
+1 };
1801 /* walk_tree helper function for type_visibility. */
1804 min_vis_r (tree
*tp
, int *walk_subtrees
, void *data
)
1806 int *vis_p
= (int *)data
;
1811 else if (CLASS_TYPE_P (*tp
))
1813 if (!TREE_PUBLIC (TYPE_MAIN_DECL (*tp
)))
1815 *vis_p
= VISIBILITY_ANON
;
1818 else if (CLASSTYPE_VISIBILITY (*tp
) > *vis_p
)
1819 *vis_p
= CLASSTYPE_VISIBILITY (*tp
);
1824 /* Returns the visibility of TYPE, which is the minimum visibility of its
1828 type_visibility (tree type
)
1830 int vis
= VISIBILITY_DEFAULT
;
1831 cp_walk_tree_without_duplicates (&type
, min_vis_r
, &vis
);
1835 /* Limit the visibility of DECL to VISIBILITY, if not explicitly
1836 specified (or if VISIBILITY is static). */
1839 constrain_visibility (tree decl
, int visibility
)
1841 if (visibility
== VISIBILITY_ANON
)
1843 /* extern "C" declarations aren't affected by the anonymous
1845 if (!DECL_EXTERN_C_P (decl
))
1847 TREE_PUBLIC (decl
) = 0;
1848 DECL_COMDAT_GROUP (decl
) = NULL_TREE
;
1849 DECL_INTERFACE_KNOWN (decl
) = 1;
1850 if (DECL_LANG_SPECIFIC (decl
))
1851 DECL_NOT_REALLY_EXTERN (decl
) = 1;
1854 else if (visibility
> DECL_VISIBILITY (decl
)
1855 && !DECL_VISIBILITY_SPECIFIED (decl
))
1857 DECL_VISIBILITY (decl
) = (enum symbol_visibility
) visibility
;
1863 /* Constrain the visibility of DECL based on the visibility of its template
1867 constrain_visibility_for_template (tree decl
, tree targs
)
1869 /* If this is a template instantiation, check the innermost
1870 template args for visibility constraints. The outer template
1871 args are covered by the class check. */
1872 tree args
= INNERMOST_TEMPLATE_ARGS (targs
);
1874 for (i
= TREE_VEC_LENGTH (args
); i
> 0; --i
)
1878 tree arg
= TREE_VEC_ELT (args
, i
-1);
1880 vis
= type_visibility (arg
);
1881 else if (TREE_TYPE (arg
) && POINTER_TYPE_P (TREE_TYPE (arg
)))
1884 if (TREE_CODE (arg
) == ADDR_EXPR
)
1885 arg
= TREE_OPERAND (arg
, 0);
1886 if (TREE_CODE (arg
) == VAR_DECL
1887 || TREE_CODE (arg
) == FUNCTION_DECL
)
1889 if (! TREE_PUBLIC (arg
))
1890 vis
= VISIBILITY_ANON
;
1892 vis
= DECL_VISIBILITY (arg
);
1896 constrain_visibility (decl
, vis
);
1900 /* Like c_determine_visibility, but with additional C++-specific
1903 Function-scope entities can rely on the function's visibility because
1904 it is set in start_preparsed_function.
1906 Class-scope entities cannot rely on the class's visibility until the end
1907 of the enclosing class definition.
1909 Note that because namespaces have multiple independent definitions,
1910 namespace visibility is handled elsewhere using the #pragma visibility
1911 machinery rather than by decorating the namespace declaration.
1913 The goal is for constraints from the type to give a diagnostic, and
1914 other constraints to be applied silently. */
1917 determine_visibility (tree decl
)
1919 tree class_type
= NULL_TREE
;
1921 bool orig_visibility_specified
;
1922 enum symbol_visibility orig_visibility
;
1924 /* Remember that all decls get VISIBILITY_DEFAULT when built. */
1926 /* Only relevant for names with external linkage. */
1927 if (!TREE_PUBLIC (decl
))
1930 /* Cloned constructors and destructors get the same visibility as
1931 the underlying function. That should be set up in
1932 maybe_clone_body. */
1933 gcc_assert (!DECL_CLONED_FUNCTION_P (decl
));
1935 orig_visibility_specified
= DECL_VISIBILITY_SPECIFIED (decl
);
1936 orig_visibility
= DECL_VISIBILITY (decl
);
1938 if (TREE_CODE (decl
) == TYPE_DECL
)
1940 if (CLASS_TYPE_P (TREE_TYPE (decl
)))
1941 use_template
= CLASSTYPE_USE_TEMPLATE (TREE_TYPE (decl
));
1942 else if (TYPE_TEMPLATE_INFO (TREE_TYPE (decl
)))
1947 else if (DECL_LANG_SPECIFIC (decl
))
1948 use_template
= DECL_USE_TEMPLATE (decl
);
1952 /* If DECL is a member of a class, visibility specifiers on the
1953 class can influence the visibility of the DECL. */
1954 if (DECL_CLASS_SCOPE_P (decl
))
1955 class_type
= DECL_CONTEXT (decl
);
1958 /* Not a class member. */
1960 /* Virtual tables have DECL_CONTEXT set to their associated class,
1961 so they are automatically handled above. */
1962 gcc_assert (TREE_CODE (decl
) != VAR_DECL
1963 || !DECL_VTABLE_OR_VTT_P (decl
));
1965 if (DECL_FUNCTION_SCOPE_P (decl
) && ! DECL_VISIBILITY_SPECIFIED (decl
))
1967 /* Local statics and classes get the visibility of their
1968 containing function by default, except that
1969 -fvisibility-inlines-hidden doesn't affect them. */
1970 tree fn
= DECL_CONTEXT (decl
);
1971 if (DECL_VISIBILITY_SPECIFIED (fn
) || ! DECL_CLASS_SCOPE_P (fn
))
1973 DECL_VISIBILITY (decl
) = DECL_VISIBILITY (fn
);
1974 DECL_VISIBILITY_SPECIFIED (decl
) =
1975 DECL_VISIBILITY_SPECIFIED (fn
);
1978 determine_visibility_from_class (decl
, DECL_CONTEXT (fn
));
1980 /* Local classes in templates have CLASSTYPE_USE_TEMPLATE set,
1981 but have no TEMPLATE_INFO, so don't try to check it. */
1984 else if (TREE_CODE (decl
) == VAR_DECL
&& DECL_TINFO_P (decl
)
1985 && flag_visibility_ms_compat
)
1987 /* Under -fvisibility-ms-compat, types are visible by default,
1988 even though their contents aren't. */
1989 tree underlying_type
= TREE_TYPE (DECL_NAME (decl
));
1990 int underlying_vis
= type_visibility (underlying_type
);
1991 if (underlying_vis
== VISIBILITY_ANON
1992 || CLASSTYPE_VISIBILITY_SPECIFIED (underlying_type
))
1993 constrain_visibility (decl
, underlying_vis
);
1995 DECL_VISIBILITY (decl
) = VISIBILITY_DEFAULT
;
1997 else if (TREE_CODE (decl
) == VAR_DECL
&& DECL_TINFO_P (decl
))
1999 /* tinfo visibility is based on the type it's for. */
2000 constrain_visibility
2001 (decl
, type_visibility (TREE_TYPE (DECL_NAME (decl
))));
2003 /* Give the target a chance to override the visibility associated
2005 if (TREE_PUBLIC (decl
)
2006 && !DECL_REALLY_EXTERN (decl
)
2007 && CLASS_TYPE_P (TREE_TYPE (DECL_NAME (decl
)))
2008 && !CLASSTYPE_VISIBILITY_SPECIFIED (TREE_TYPE (DECL_NAME (decl
))))
2009 targetm
.cxx
.determine_class_data_visibility (decl
);
2011 else if (use_template
)
2012 /* Template instantiations and specializations get visibility based
2013 on their template unless they override it with an attribute. */;
2014 else if (! DECL_VISIBILITY_SPECIFIED (decl
))
2016 /* Set default visibility to whatever the user supplied with
2017 #pragma GCC visibility or a namespace visibility attribute. */
2018 DECL_VISIBILITY (decl
) = default_visibility
;
2019 DECL_VISIBILITY_SPECIFIED (decl
) = visibility_options
.inpragma
;
2025 /* If the specialization doesn't specify visibility, use the
2026 visibility from the template. */
2027 tree tinfo
= (TREE_CODE (decl
) == TYPE_DECL
2028 ? TYPE_TEMPLATE_INFO (TREE_TYPE (decl
))
2029 : DECL_TEMPLATE_INFO (decl
));
2030 tree args
= TI_ARGS (tinfo
);
2032 if (args
!= error_mark_node
)
2034 int depth
= TMPL_ARGS_DEPTH (args
);
2035 tree pattern
= DECL_TEMPLATE_RESULT (TI_TEMPLATE (tinfo
));
2037 if (!DECL_VISIBILITY_SPECIFIED (decl
))
2039 DECL_VISIBILITY (decl
) = DECL_VISIBILITY (pattern
);
2040 DECL_VISIBILITY_SPECIFIED (decl
)
2041 = DECL_VISIBILITY_SPECIFIED (pattern
);
2044 /* FIXME should TMPL_ARGS_DEPTH really return 1 for null input? */
2045 if (args
&& depth
> template_class_depth (class_type
))
2046 /* Limit visibility based on its template arguments. */
2047 constrain_visibility_for_template (decl
, args
);
2052 determine_visibility_from_class (decl
, class_type
);
2054 if (decl_anon_ns_mem_p (decl
))
2055 /* Names in an anonymous namespace get internal linkage.
2056 This might change once we implement export. */
2057 constrain_visibility (decl
, VISIBILITY_ANON
);
2058 else if (TREE_CODE (decl
) != TYPE_DECL
)
2060 /* Propagate anonymity from type to decl. */
2061 int tvis
= type_visibility (TREE_TYPE (decl
));
2062 if (tvis
== VISIBILITY_ANON
2063 || ! DECL_VISIBILITY_SPECIFIED (decl
))
2064 constrain_visibility (decl
, tvis
);
2067 /* If visibility changed and DECL already has DECL_RTL, ensure
2068 symbol flags are updated. */
2069 if ((DECL_VISIBILITY (decl
) != orig_visibility
2070 || DECL_VISIBILITY_SPECIFIED (decl
) != orig_visibility_specified
)
2071 && ((TREE_CODE (decl
) == VAR_DECL
&& TREE_STATIC (decl
))
2072 || TREE_CODE (decl
) == FUNCTION_DECL
)
2073 && DECL_RTL_SET_P (decl
))
2074 make_decl_rtl (decl
);
2077 /* By default, static data members and function members receive
2078 the visibility of their containing class. */
2081 determine_visibility_from_class (tree decl
, tree class_type
)
2083 if (DECL_VISIBILITY_SPECIFIED (decl
))
2086 if (visibility_options
.inlines_hidden
2087 /* Don't do this for inline templates; specializations might not be
2088 inline, and we don't want them to inherit the hidden
2089 visibility. We'll set it here for all inline instantiations. */
2090 && !processing_template_decl
2091 && TREE_CODE (decl
) == FUNCTION_DECL
2092 && DECL_DECLARED_INLINE_P (decl
)
2093 && (! DECL_LANG_SPECIFIC (decl
)
2094 || ! DECL_EXPLICIT_INSTANTIATION (decl
)))
2095 DECL_VISIBILITY (decl
) = VISIBILITY_HIDDEN
;
2098 /* Default to the class visibility. */
2099 DECL_VISIBILITY (decl
) = CLASSTYPE_VISIBILITY (class_type
);
2100 DECL_VISIBILITY_SPECIFIED (decl
)
2101 = CLASSTYPE_VISIBILITY_SPECIFIED (class_type
);
2104 /* Give the target a chance to override the visibility associated
2106 if (TREE_CODE (decl
) == VAR_DECL
2107 && (DECL_TINFO_P (decl
)
2108 || (DECL_VTABLE_OR_VTT_P (decl
)
2109 /* Construction virtual tables are not exported because
2110 they cannot be referred to from other object files;
2111 their name is not standardized by the ABI. */
2112 && !DECL_CONSTRUCTION_VTABLE_P (decl
)))
2113 && TREE_PUBLIC (decl
)
2114 && !DECL_REALLY_EXTERN (decl
)
2115 && !CLASSTYPE_VISIBILITY_SPECIFIED (class_type
))
2116 targetm
.cxx
.determine_class_data_visibility (decl
);
2119 /* Constrain the visibility of a class TYPE based on the visibility of its
2120 field types. Warn if any fields require lesser visibility. */
2123 constrain_class_visibility (tree type
)
2129 int vis
= type_visibility (type
);
2131 if (vis
== VISIBILITY_ANON
2132 || DECL_IN_SYSTEM_HEADER (TYPE_MAIN_DECL (type
)))
2135 /* Don't warn about visibility if the class has explicit visibility. */
2136 if (CLASSTYPE_VISIBILITY_SPECIFIED (type
))
2137 vis
= VISIBILITY_INTERNAL
;
2139 for (t
= TYPE_FIELDS (type
); t
; t
= TREE_CHAIN (t
))
2140 if (TREE_CODE (t
) == FIELD_DECL
&& TREE_TYPE (t
) != error_mark_node
)
2142 tree ftype
= strip_pointer_or_array_types (TREE_TYPE (t
));
2143 int subvis
= type_visibility (ftype
);
2145 if (subvis
== VISIBILITY_ANON
)
2147 if (!in_main_input_context ())
2149 %qT has a field %qD whose type uses the anonymous namespace",
2152 else if (MAYBE_CLASS_TYPE_P (ftype
)
2153 && vis
< VISIBILITY_HIDDEN
2154 && subvis
>= VISIBILITY_HIDDEN
)
2155 warning (OPT_Wattributes
, "\
2156 %qT declared with greater visibility than the type of its field %qD",
2160 binfo
= TYPE_BINFO (type
);
2161 for (i
= 0; BINFO_BASE_ITERATE (binfo
, i
, t
); ++i
)
2163 int subvis
= type_visibility (TREE_TYPE (t
));
2165 if (subvis
== VISIBILITY_ANON
)
2167 if (!in_main_input_context())
2169 %qT has a base %qT whose type uses the anonymous namespace",
2170 type
, TREE_TYPE (t
));
2172 else if (vis
< VISIBILITY_HIDDEN
2173 && subvis
>= VISIBILITY_HIDDEN
)
2174 warning (OPT_Wattributes
, "\
2175 %qT declared with greater visibility than its base %qT",
2176 type
, TREE_TYPE (t
));
2180 /* DECL is a FUNCTION_DECL or VAR_DECL. If the object file linkage
2181 for DECL has not already been determined, do so now by setting
2182 DECL_EXTERNAL, DECL_COMDAT and other related flags. Until this
2183 function is called entities with vague linkage whose definitions
2184 are available must have TREE_PUBLIC set.
2186 If this function decides to place DECL in COMDAT, it will set
2187 appropriate flags -- but will not clear DECL_EXTERNAL. It is up to
2188 the caller to decide whether or not to clear DECL_EXTERNAL. Some
2189 callers defer that decision until it is clear that DECL is actually
2193 import_export_decl (tree decl
)
2198 tree class_type
= NULL_TREE
;
2200 if (DECL_INTERFACE_KNOWN (decl
))
2203 /* We cannot determine what linkage to give to an entity with vague
2204 linkage until the end of the file. For example, a virtual table
2205 for a class will be defined if and only if the key method is
2206 defined in this translation unit. As a further example, consider
2207 that when compiling a translation unit that uses PCH file with
2208 "-frepo" it would be incorrect to make decisions about what
2209 entities to emit when building the PCH; those decisions must be
2210 delayed until the repository information has been processed. */
2211 gcc_assert (at_eof
);
2212 /* Object file linkage for explicit instantiations is handled in
2213 mark_decl_instantiated. For static variables in functions with
2214 vague linkage, maybe_commonize_var is used.
2216 Therefore, the only declarations that should be provided to this
2217 function are those with external linkage that are:
2219 * implicit instantiations of function templates
2223 * implicit instantiations of static data members of class
2230 Furthermore, all entities that reach this point must have a
2231 definition available in this translation unit.
2233 The following assertions check these conditions. */
2234 gcc_assert (TREE_CODE (decl
) == FUNCTION_DECL
2235 || TREE_CODE (decl
) == VAR_DECL
);
2236 /* Any code that creates entities with TREE_PUBLIC cleared should
2237 also set DECL_INTERFACE_KNOWN. */
2238 gcc_assert (TREE_PUBLIC (decl
));
2239 if (TREE_CODE (decl
) == FUNCTION_DECL
)
2240 gcc_assert (DECL_IMPLICIT_INSTANTIATION (decl
)
2241 || DECL_FRIEND_PSEUDO_TEMPLATE_INSTANTIATION (decl
)
2242 || DECL_DECLARED_INLINE_P (decl
));
2244 gcc_assert (DECL_IMPLICIT_INSTANTIATION (decl
)
2245 || DECL_VTABLE_OR_VTT_P (decl
)
2246 || DECL_TINFO_P (decl
));
2247 /* Check that a definition of DECL is available in this translation
2249 gcc_assert (!DECL_REALLY_EXTERN (decl
));
2251 /* Assume that DECL will not have COMDAT linkage. */
2253 /* Assume that DECL will not be imported into this translation
2257 /* See if the repository tells us whether or not to emit DECL in
2258 this translation unit. */
2259 emit_p
= repo_emit_p (decl
);
2262 else if (emit_p
== 1)
2264 /* The repository indicates that this entity should be defined
2265 here. Make sure the back end honors that request. */
2266 if (TREE_CODE (decl
) == VAR_DECL
)
2268 else if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl
)
2269 || DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P (decl
))
2272 FOR_EACH_CLONE (clone
, decl
)
2273 mark_needed (clone
);
2277 /* Output the definition as an ordinary strong definition. */
2278 DECL_EXTERNAL (decl
) = 0;
2279 DECL_INTERFACE_KNOWN (decl
) = 1;
2284 /* We have already decided what to do with this DECL; there is no
2285 need to check anything further. */
2287 else if (TREE_CODE (decl
) == VAR_DECL
&& DECL_VTABLE_OR_VTT_P (decl
))
2289 class_type
= DECL_CONTEXT (decl
);
2290 import_export_class (class_type
);
2291 if (TYPE_FOR_JAVA (class_type
))
2293 else if (CLASSTYPE_INTERFACE_KNOWN (class_type
)
2294 && CLASSTYPE_INTERFACE_ONLY (class_type
))
2296 else if ((!flag_weak
|| TARGET_WEAK_NOT_IN_ARCHIVE_TOC
)
2297 && !CLASSTYPE_USE_TEMPLATE (class_type
)
2298 && CLASSTYPE_KEY_METHOD (class_type
)
2299 && !DECL_DECLARED_INLINE_P (CLASSTYPE_KEY_METHOD (class_type
)))
2300 /* The ABI requires that all virtual tables be emitted with
2301 COMDAT linkage. However, on systems where COMDAT symbols
2302 don't show up in the table of contents for a static
2303 archive, or on systems without weak symbols (where we
2304 approximate COMDAT linkage by using internal linkage), the
2305 linker will report errors about undefined symbols because
2306 it will not see the virtual table definition. Therefore,
2307 in the case that we know that the virtual table will be
2308 emitted in only one translation unit, we make the virtual
2309 table an ordinary definition with external linkage. */
2310 DECL_EXTERNAL (decl
) = 0;
2311 else if (CLASSTYPE_INTERFACE_KNOWN (class_type
))
2313 /* CLASS_TYPE is being exported from this translation unit,
2314 so DECL should be defined here. */
2315 if (!flag_weak
&& CLASSTYPE_EXPLICIT_INSTANTIATION (class_type
))
2316 /* If a class is declared in a header with the "extern
2317 template" extension, then it will not be instantiated,
2318 even in translation units that would normally require
2319 it. Often such classes are explicitly instantiated in
2320 one translation unit. Therefore, the explicit
2321 instantiation must be made visible to other translation
2323 DECL_EXTERNAL (decl
) = 0;
2326 /* The generic C++ ABI says that class data is always
2327 COMDAT, even if there is a key function. Some
2328 variants (e.g., the ARM EABI) says that class data
2329 only has COMDAT linkage if the class data might be
2330 emitted in more than one translation unit. When the
2331 key method can be inline and is inline, we still have
2332 to arrange for comdat even though
2333 class_data_always_comdat is false. */
2334 if (!CLASSTYPE_KEY_METHOD (class_type
)
2335 || DECL_DECLARED_INLINE_P (CLASSTYPE_KEY_METHOD (class_type
))
2336 || targetm
.cxx
.class_data_always_comdat ())
2338 /* The ABI requires COMDAT linkage. Normally, we
2339 only emit COMDAT things when they are needed;
2340 make sure that we realize that this entity is
2347 else if (!flag_implicit_templates
2348 && CLASSTYPE_IMPLICIT_INSTANTIATION (class_type
))
2353 else if (TREE_CODE (decl
) == VAR_DECL
&& DECL_TINFO_P (decl
))
2355 tree type
= TREE_TYPE (DECL_NAME (decl
));
2356 if (CLASS_TYPE_P (type
))
2359 import_export_class (type
);
2360 if (CLASSTYPE_INTERFACE_KNOWN (type
)
2361 && TYPE_POLYMORPHIC_P (type
)
2362 && CLASSTYPE_INTERFACE_ONLY (type
)
2363 /* If -fno-rtti was specified, then we cannot be sure
2364 that RTTI information will be emitted with the
2365 virtual table of the class, so we must emit it
2366 wherever it is used. */
2371 if (CLASSTYPE_INTERFACE_KNOWN (type
)
2372 && !CLASSTYPE_INTERFACE_ONLY (type
))
2374 comdat_p
= (targetm
.cxx
.class_data_always_comdat ()
2375 || (CLASSTYPE_KEY_METHOD (type
)
2376 && DECL_DECLARED_INLINE_P (CLASSTYPE_KEY_METHOD (type
))));
2381 DECL_EXTERNAL (decl
) = 0;
2391 else if (DECL_TEMPLATE_INSTANTIATION (decl
)
2392 || DECL_FRIEND_PSEUDO_TEMPLATE_INSTANTIATION (decl
))
2394 /* DECL is an implicit instantiation of a function or static
2396 if ((flag_implicit_templates
2397 && !flag_use_repository
)
2398 || (flag_implicit_inline_templates
2399 && TREE_CODE (decl
) == FUNCTION_DECL
2400 && DECL_DECLARED_INLINE_P (decl
)))
2403 /* If we are not implicitly generating templates, then mark
2404 this entity as undefined in this translation unit. */
2407 else if (DECL_FUNCTION_MEMBER_P (decl
))
2409 if (!DECL_DECLARED_INLINE_P (decl
))
2411 tree ctype
= DECL_CONTEXT (decl
);
2412 import_export_class (ctype
);
2413 if (CLASSTYPE_INTERFACE_KNOWN (ctype
))
2415 DECL_NOT_REALLY_EXTERN (decl
)
2416 = ! (CLASSTYPE_INTERFACE_ONLY (ctype
)
2417 || (DECL_DECLARED_INLINE_P (decl
)
2418 && ! flag_implement_inlines
2419 && !DECL_VINDEX (decl
)));
2421 if (!DECL_NOT_REALLY_EXTERN (decl
))
2422 DECL_EXTERNAL (decl
) = 1;
2424 /* Always make artificials weak. */
2425 if (DECL_ARTIFICIAL (decl
) && flag_weak
)
2428 maybe_make_one_only (decl
);
2439 /* If we are importing DECL into this translation unit, mark is
2440 an undefined here. */
2441 DECL_EXTERNAL (decl
) = 1;
2442 DECL_NOT_REALLY_EXTERN (decl
) = 0;
2446 /* If we decided to put DECL in COMDAT, mark it accordingly at
2448 comdat_linkage (decl
);
2451 DECL_INTERFACE_KNOWN (decl
) = 1;
2454 /* Return an expression that performs the destruction of DECL, which
2455 must be a VAR_DECL whose type has a non-trivial destructor, or is
2456 an array whose (innermost) elements have a non-trivial destructor. */
2459 build_cleanup (tree decl
)
2462 tree type
= TREE_TYPE (decl
);
2464 /* This function should only be called for declarations that really
2465 require cleanups. */
2466 gcc_assert (!TYPE_HAS_TRIVIAL_DESTRUCTOR (type
));
2468 /* Treat all objects with destructors as used; the destructor may do
2469 something substantive. */
2472 if (TREE_CODE (type
) == ARRAY_TYPE
)
2475 temp
= build_address (decl
);
2476 temp
= build_delete (TREE_TYPE (temp
), temp
,
2477 sfk_complete_destructor
,
2478 LOOKUP_NORMAL
|LOOKUP_NONVIRTUAL
|LOOKUP_DESTRUCTOR
, 0);
2482 /* Returns the initialization guard variable for the variable DECL,
2483 which has static storage duration. */
2486 get_guard (tree decl
)
2491 sname
= mangle_guard_variable (decl
);
2492 guard
= IDENTIFIER_GLOBAL_VALUE (sname
);
2497 /* We use a type that is big enough to contain a mutex as well
2498 as an integer counter. */
2499 guard_type
= targetm
.cxx
.guard_type ();
2500 guard
= build_decl (DECL_SOURCE_LOCATION (decl
),
2501 VAR_DECL
, sname
, guard_type
);
2503 /* The guard should have the same linkage as what it guards. */
2504 TREE_PUBLIC (guard
) = TREE_PUBLIC (decl
);
2505 TREE_STATIC (guard
) = TREE_STATIC (decl
);
2506 DECL_COMMON (guard
) = DECL_COMMON (decl
);
2507 DECL_COMDAT_GROUP (guard
) = DECL_COMDAT_GROUP (decl
);
2508 if (TREE_PUBLIC (decl
))
2509 DECL_WEAK (guard
) = DECL_WEAK (decl
);
2510 DECL_VISIBILITY (guard
) = DECL_VISIBILITY (decl
);
2511 DECL_VISIBILITY_SPECIFIED (guard
) = DECL_VISIBILITY_SPECIFIED (decl
);
2513 DECL_ARTIFICIAL (guard
) = 1;
2514 DECL_IGNORED_P (guard
) = 1;
2515 TREE_USED (guard
) = 1;
2516 pushdecl_top_level_and_finish (guard
, NULL_TREE
);
2521 /* Return those bits of the GUARD variable that should be set when the
2522 guarded entity is actually initialized. */
2525 get_guard_bits (tree guard
)
2527 if (!targetm
.cxx
.guard_mask_bit ())
2529 /* We only set the first byte of the guard, in order to leave room
2530 for a mutex in the high-order bits. */
2531 guard
= build1 (ADDR_EXPR
,
2532 build_pointer_type (TREE_TYPE (guard
)),
2534 guard
= build1 (NOP_EXPR
,
2535 build_pointer_type (char_type_node
),
2537 guard
= build1 (INDIRECT_REF
, char_type_node
, guard
);
2543 /* Return an expression which determines whether or not the GUARD
2544 variable has already been initialized. */
2547 get_guard_cond (tree guard
)
2551 /* Check to see if the GUARD is zero. */
2552 guard
= get_guard_bits (guard
);
2554 /* Mask off all but the low bit. */
2555 if (targetm
.cxx
.guard_mask_bit ())
2557 guard_value
= integer_one_node
;
2558 if (!same_type_p (TREE_TYPE (guard_value
), TREE_TYPE (guard
)))
2559 guard_value
= convert (TREE_TYPE (guard
), guard_value
);
2560 guard
= cp_build_binary_op (input_location
,
2561 BIT_AND_EXPR
, guard
, guard_value
,
2562 tf_warning_or_error
);
2565 guard_value
= integer_zero_node
;
2566 if (!same_type_p (TREE_TYPE (guard_value
), TREE_TYPE (guard
)))
2567 guard_value
= convert (TREE_TYPE (guard
), guard_value
);
2568 return cp_build_binary_op (input_location
,
2569 EQ_EXPR
, guard
, guard_value
,
2570 tf_warning_or_error
);
2573 /* Return an expression which sets the GUARD variable, indicating that
2574 the variable being guarded has been initialized. */
2577 set_guard (tree guard
)
2581 /* Set the GUARD to one. */
2582 guard
= get_guard_bits (guard
);
2583 guard_init
= integer_one_node
;
2584 if (!same_type_p (TREE_TYPE (guard_init
), TREE_TYPE (guard
)))
2585 guard_init
= convert (TREE_TYPE (guard
), guard_init
);
2586 return cp_build_modify_expr (guard
, NOP_EXPR
, guard_init
,
2587 tf_warning_or_error
);
2590 /* Start the process of running a particular set of global constructors
2591 or destructors. Subroutine of do_[cd]tors. */
2594 start_objects (int method_type
, int initp
)
2600 /* Make ctor or dtor function. METHOD_TYPE may be 'I' or 'D'. */
2602 if (initp
!= DEFAULT_INIT_PRIORITY
)
2612 sprintf (type
, "%c%c%.5u", method_type
, joiner
, initp
);
2615 sprintf (type
, "%c", method_type
);
2617 fndecl
= build_lang_decl (FUNCTION_DECL
,
2618 get_file_function_name (type
),
2619 build_function_type (void_type_node
,
2621 start_preparsed_function (fndecl
, /*attrs=*/NULL_TREE
, SF_PRE_PARSED
);
2623 TREE_PUBLIC (current_function_decl
) = 0;
2625 /* Mark as artificial because it's not explicitly in the user's
2627 DECL_ARTIFICIAL (current_function_decl
) = 1;
2629 /* Mark this declaration as used to avoid spurious warnings. */
2630 TREE_USED (current_function_decl
) = 1;
2632 /* Mark this function as a global constructor or destructor. */
2633 if (method_type
== 'I')
2634 DECL_GLOBAL_CTOR_P (current_function_decl
) = 1;
2636 DECL_GLOBAL_DTOR_P (current_function_decl
) = 1;
2638 body
= begin_compound_stmt (BCS_FN_BODY
);
2643 /* Finish the process of running a particular set of global constructors
2644 or destructors. Subroutine of do_[cd]tors. */
2647 finish_objects (int method_type
, int initp
, tree body
)
2652 finish_compound_stmt (body
);
2653 fn
= finish_function (0);
2655 if (method_type
== 'I')
2657 DECL_STATIC_CONSTRUCTOR (fn
) = 1;
2658 decl_init_priority_insert (fn
, initp
);
2662 DECL_STATIC_DESTRUCTOR (fn
) = 1;
2663 decl_fini_priority_insert (fn
, initp
);
2666 expand_or_defer_fn (fn
);
2669 /* The names of the parameters to the function created to handle
2670 initializations and destructions for objects with static storage
2672 #define INITIALIZE_P_IDENTIFIER "__initialize_p"
2673 #define PRIORITY_IDENTIFIER "__priority"
2675 /* The name of the function we create to handle initializations and
2676 destructions for objects with static storage duration. */
2677 #define SSDF_IDENTIFIER "__static_initialization_and_destruction"
2679 /* The declaration for the __INITIALIZE_P argument. */
2680 static GTY(()) tree initialize_p_decl
;
2682 /* The declaration for the __PRIORITY argument. */
2683 static GTY(()) tree priority_decl
;
2685 /* The declaration for the static storage duration function. */
2686 static GTY(()) tree ssdf_decl
;
2688 /* All the static storage duration functions created in this
2689 translation unit. */
2690 static GTY(()) VEC(tree
,gc
) *ssdf_decls
;
2692 /* A map from priority levels to information about that priority
2693 level. There may be many such levels, so efficient lookup is
2695 static splay_tree priority_info_map
;
2697 /* Begins the generation of the function that will handle all
2698 initialization and destruction of objects with static storage
2699 duration. The function generated takes two parameters of type
2700 `int': __INITIALIZE_P and __PRIORITY. If __INITIALIZE_P is
2701 nonzero, it performs initializations. Otherwise, it performs
2702 destructions. It only performs those initializations or
2703 destructions with the indicated __PRIORITY. The generated function
2706 It is assumed that this function will only be called once per
2707 translation unit. */
2710 start_static_storage_duration_function (unsigned count
)
2715 char id
[sizeof (SSDF_IDENTIFIER
) + 1 /* '\0' */ + 32];
2717 /* Create the identifier for this function. It will be of the form
2718 SSDF_IDENTIFIER_<number>. */
2719 sprintf (id
, "%s_%u", SSDF_IDENTIFIER
, count
);
2721 /* Create the parameters. */
2722 parm_types
= void_list_node
;
2723 parm_types
= tree_cons (NULL_TREE
, integer_type_node
, parm_types
);
2724 parm_types
= tree_cons (NULL_TREE
, integer_type_node
, parm_types
);
2725 type
= build_function_type (void_type_node
, parm_types
);
2727 /* Create the FUNCTION_DECL itself. */
2728 ssdf_decl
= build_lang_decl (FUNCTION_DECL
,
2729 get_identifier (id
),
2731 TREE_PUBLIC (ssdf_decl
) = 0;
2732 DECL_ARTIFICIAL (ssdf_decl
) = 1;
2734 /* Put this function in the list of functions to be called from the
2735 static constructors and destructors. */
2738 ssdf_decls
= VEC_alloc (tree
, gc
, 32);
2740 /* Take this opportunity to initialize the map from priority
2741 numbers to information about that priority level. */
2742 priority_info_map
= splay_tree_new (splay_tree_compare_ints
,
2743 /*delete_key_fn=*/0,
2744 /*delete_value_fn=*/
2745 (splay_tree_delete_value_fn
) &free
);
2747 /* We always need to generate functions for the
2748 DEFAULT_INIT_PRIORITY so enter it now. That way when we walk
2749 priorities later, we'll be sure to find the
2750 DEFAULT_INIT_PRIORITY. */
2751 get_priority_info (DEFAULT_INIT_PRIORITY
);
2754 VEC_safe_push (tree
, gc
, ssdf_decls
, ssdf_decl
);
2756 /* Create the argument list. */
2757 initialize_p_decl
= cp_build_parm_decl
2758 (get_identifier (INITIALIZE_P_IDENTIFIER
), integer_type_node
);
2759 DECL_CONTEXT (initialize_p_decl
) = ssdf_decl
;
2760 TREE_USED (initialize_p_decl
) = 1;
2761 priority_decl
= cp_build_parm_decl
2762 (get_identifier (PRIORITY_IDENTIFIER
), integer_type_node
);
2763 DECL_CONTEXT (priority_decl
) = ssdf_decl
;
2764 TREE_USED (priority_decl
) = 1;
2766 TREE_CHAIN (initialize_p_decl
) = priority_decl
;
2767 DECL_ARGUMENTS (ssdf_decl
) = initialize_p_decl
;
2769 /* Put the function in the global scope. */
2770 pushdecl (ssdf_decl
);
2772 /* Start the function itself. This is equivalent to declaring the
2775 static void __ssdf (int __initialize_p, init __priority_p);
2777 It is static because we only need to call this function from the
2778 various constructor and destructor functions for this module. */
2779 start_preparsed_function (ssdf_decl
,
2780 /*attrs=*/NULL_TREE
,
2783 /* Set up the scope of the outermost block in the function. */
2784 body
= begin_compound_stmt (BCS_FN_BODY
);
2789 /* Finish the generation of the function which performs initialization
2790 and destruction of objects with static storage duration. After
2791 this point, no more such objects can be created. */
2794 finish_static_storage_duration_function (tree body
)
2796 /* Close out the function. */
2797 finish_compound_stmt (body
);
2798 expand_or_defer_fn (finish_function (0));
2801 /* Return the information about the indicated PRIORITY level. If no
2802 code to handle this level has yet been generated, generate the
2803 appropriate prologue. */
2805 static priority_info
2806 get_priority_info (int priority
)
2811 n
= splay_tree_lookup (priority_info_map
,
2812 (splay_tree_key
) priority
);
2815 /* Create a new priority information structure, and insert it
2817 pi
= XNEW (struct priority_info_s
);
2818 pi
->initializations_p
= 0;
2819 pi
->destructions_p
= 0;
2820 splay_tree_insert (priority_info_map
,
2821 (splay_tree_key
) priority
,
2822 (splay_tree_value
) pi
);
2825 pi
= (priority_info
) n
->value
;
2830 /* The effective initialization priority of a DECL. */
2832 #define DECL_EFFECTIVE_INIT_PRIORITY(decl) \
2833 ((!DECL_HAS_INIT_PRIORITY_P (decl) || DECL_INIT_PRIORITY (decl) == 0) \
2834 ? DEFAULT_INIT_PRIORITY : DECL_INIT_PRIORITY (decl))
2836 /* Whether a DECL needs a guard to protect it against multiple
2839 #define NEEDS_GUARD_P(decl) (TREE_PUBLIC (decl) && (DECL_COMMON (decl) \
2840 || DECL_ONE_ONLY (decl) \
2841 || DECL_WEAK (decl)))
2843 /* Called from one_static_initialization_or_destruction(),
2845 Walks the initializer list of a global variable and looks for
2846 temporary variables (DECL_NAME() == NULL and DECL_ARTIFICIAL != 0)
2847 and that have their DECL_CONTEXT() == NULL.
2848 For each such temporary variable, set their DECL_CONTEXT() to
2849 the current function. This is necessary because otherwise
2850 some optimizers (enabled by -O2 -fprofile-arcs) might crash
2851 when trying to refer to a temporary variable that does not have
2852 it's DECL_CONTECT() properly set. */
2854 fix_temporary_vars_context_r (tree
*node
,
2855 int *unused ATTRIBUTE_UNUSED
,
2856 void *unused1 ATTRIBUTE_UNUSED
)
2858 gcc_assert (current_function_decl
);
2860 if (TREE_CODE (*node
) == BIND_EXPR
)
2864 for (var
= BIND_EXPR_VARS (*node
); var
; var
= TREE_CHAIN (var
))
2865 if (TREE_CODE (var
) == VAR_DECL
2867 && DECL_ARTIFICIAL (var
)
2868 && !DECL_CONTEXT (var
))
2869 DECL_CONTEXT (var
) = current_function_decl
;
2875 /* Set up to handle the initialization or destruction of DECL. If
2876 INITP is nonzero, we are initializing the variable. Otherwise, we
2877 are destroying it. */
2880 one_static_initialization_or_destruction (tree decl
, tree init
, bool initp
)
2882 tree guard_if_stmt
= NULL_TREE
;
2885 /* If we are supposed to destruct and there's a trivial destructor,
2886 nothing has to be done. */
2888 && TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl
)))
2891 /* Trick the compiler into thinking we are at the file and line
2892 where DECL was declared so that error-messages make sense, and so
2893 that the debugger will show somewhat sensible file and line
2895 input_location
= DECL_SOURCE_LOCATION (decl
);
2897 /* Make sure temporary variables in the initialiser all have
2898 their DECL_CONTEXT() set to a value different from NULL_TREE.
2899 This can happen when global variables initialisers are built.
2900 In that case, the DECL_CONTEXT() of the global variables _AND_ of all
2901 the temporary variables that might have been generated in the
2902 accompagning initialisers is NULL_TREE, meaning the variables have been
2903 declared in the global namespace.
2904 What we want to do here is to fix that and make sure the DECL_CONTEXT()
2905 of the temporaries are set to the current function decl. */
2906 cp_walk_tree_without_duplicates (&init
,
2907 fix_temporary_vars_context_r
,
2914 Access control for implicit calls to the constructors,
2915 the conversion functions, or the destructor called to
2916 create and destroy a static data member is performed as
2917 if these calls appeared in the scope of the member's
2920 we pretend we are in a static member function of the class of
2921 which the DECL is a member. */
2922 if (member_p (decl
))
2924 DECL_CONTEXT (current_function_decl
) = DECL_CONTEXT (decl
);
2925 DECL_STATIC_FUNCTION_P (current_function_decl
) = 1;
2928 /* Assume we don't need a guard. */
2930 /* We need a guard if this is an object with external linkage that
2931 might be initialized in more than one place. (For example, a
2932 static data member of a template, when the data member requires
2934 if (NEEDS_GUARD_P (decl
))
2938 guard
= get_guard (decl
);
2940 /* When using __cxa_atexit, we just check the GUARD as we would
2941 for a local static. */
2942 if (flag_use_cxa_atexit
)
2944 /* When using __cxa_atexit, we never try to destroy
2945 anything from a static destructor. */
2947 guard_cond
= get_guard_cond (guard
);
2949 /* If we don't have __cxa_atexit, then we will be running
2950 destructors from .fini sections, or their equivalents. So,
2951 we need to know how many times we've tried to initialize this
2952 object. We do initializations only if the GUARD is zero,
2953 i.e., if we are the first to initialize the variable. We do
2954 destructions only if the GUARD is one, i.e., if we are the
2955 last to destroy the variable. */
2958 = cp_build_binary_op (input_location
,
2960 cp_build_unary_op (PREINCREMENT_EXPR
,
2963 tf_warning_or_error
),
2965 tf_warning_or_error
);
2968 = cp_build_binary_op (input_location
,
2970 cp_build_unary_op (PREDECREMENT_EXPR
,
2973 tf_warning_or_error
),
2975 tf_warning_or_error
);
2977 guard_if_stmt
= begin_if_stmt ();
2978 finish_if_stmt_cond (guard_cond
, guard_if_stmt
);
2982 /* If we're using __cxa_atexit, we have not already set the GUARD,
2983 so we must do so now. */
2984 if (guard
&& initp
&& flag_use_cxa_atexit
)
2985 finish_expr_stmt (set_guard (guard
));
2987 /* Perform the initialization or destruction. */
2991 finish_expr_stmt (init
);
2993 /* If we're using __cxa_atexit, register a function that calls the
2994 destructor for the object. */
2995 if (flag_use_cxa_atexit
)
2996 finish_expr_stmt (register_dtor_fn (decl
));
2999 finish_expr_stmt (build_cleanup (decl
));
3001 /* Finish the guard if-stmt, if necessary. */
3004 finish_then_clause (guard_if_stmt
);
3005 finish_if_stmt (guard_if_stmt
);
3008 /* Now that we're done with DECL we don't need to pretend to be a
3009 member of its class any longer. */
3010 DECL_CONTEXT (current_function_decl
) = NULL_TREE
;
3011 DECL_STATIC_FUNCTION_P (current_function_decl
) = 0;
3014 /* Generate code to do the initialization or destruction of the decls in VARS,
3015 a TREE_LIST of VAR_DECL with static storage duration.
3016 Whether initialization or destruction is performed is specified by INITP. */
3019 do_static_initialization_or_destruction (tree vars
, bool initp
)
3021 tree node
, init_if_stmt
, cond
;
3023 /* Build the outer if-stmt to check for initialization or destruction. */
3024 init_if_stmt
= begin_if_stmt ();
3025 cond
= initp
? integer_one_node
: integer_zero_node
;
3026 cond
= cp_build_binary_op (input_location
,
3030 tf_warning_or_error
);
3031 finish_if_stmt_cond (cond
, init_if_stmt
);
3035 tree decl
= TREE_VALUE (node
);
3036 tree priority_if_stmt
;
3040 /* If we don't need a destructor, there's nothing to do. Avoid
3041 creating a possibly empty if-stmt. */
3042 if (!initp
&& TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl
)))
3044 node
= TREE_CHAIN (node
);
3048 /* Remember that we had an initialization or finalization at this
3050 priority
= DECL_EFFECTIVE_INIT_PRIORITY (decl
);
3051 pi
= get_priority_info (priority
);
3053 pi
->initializations_p
= 1;
3055 pi
->destructions_p
= 1;
3057 /* Conditionalize this initialization on being in the right priority
3058 and being initializing/finalizing appropriately. */
3059 priority_if_stmt
= begin_if_stmt ();
3060 cond
= cp_build_binary_op (input_location
,
3063 build_int_cst (NULL_TREE
, priority
),
3064 tf_warning_or_error
);
3065 finish_if_stmt_cond (cond
, priority_if_stmt
);
3067 /* Process initializers with same priority. */
3069 && DECL_EFFECTIVE_INIT_PRIORITY (TREE_VALUE (node
)) == priority
;
3070 node
= TREE_CHAIN (node
))
3071 /* Do one initialization or destruction. */
3072 one_static_initialization_or_destruction (TREE_VALUE (node
),
3073 TREE_PURPOSE (node
), initp
);
3075 /* Finish up the priority if-stmt body. */
3076 finish_then_clause (priority_if_stmt
);
3077 finish_if_stmt (priority_if_stmt
);
3081 /* Finish up the init/destruct if-stmt body. */
3082 finish_then_clause (init_if_stmt
);
3083 finish_if_stmt (init_if_stmt
);
3086 /* VARS is a list of variables with static storage duration which may
3087 need initialization and/or finalization. Remove those variables
3088 that don't really need to be initialized or finalized, and return
3089 the resulting list. The order in which the variables appear in
3090 VARS is in reverse order of the order in which they should actually
3091 be initialized. The list we return is in the unreversed order;
3092 i.e., the first variable should be initialized first. */
3095 prune_vars_needing_no_initialization (tree
*vars
)
3098 tree result
= NULL_TREE
;
3103 tree decl
= TREE_VALUE (t
);
3104 tree init
= TREE_PURPOSE (t
);
3106 /* Deal gracefully with error. */
3107 if (decl
== error_mark_node
)
3109 var
= &TREE_CHAIN (t
);
3113 /* The only things that can be initialized are variables. */
3114 gcc_assert (TREE_CODE (decl
) == VAR_DECL
);
3116 /* If this object is not defined, we don't need to do anything
3118 if (DECL_EXTERNAL (decl
))
3120 var
= &TREE_CHAIN (t
);
3124 /* Also, if the initializer already contains errors, we can bail
3126 if (init
&& TREE_CODE (init
) == TREE_LIST
3127 && value_member (error_mark_node
, init
))
3129 var
= &TREE_CHAIN (t
);
3133 /* This variable is going to need initialization and/or
3134 finalization, so we add it to the list. */
3135 *var
= TREE_CHAIN (t
);
3136 TREE_CHAIN (t
) = result
;
3143 /* Make sure we have told the back end about all the variables in
3147 write_out_vars (tree vars
)
3151 for (v
= vars
; v
; v
= TREE_CHAIN (v
))
3153 tree var
= TREE_VALUE (v
);
3154 if (!var_finalized_p (var
))
3156 import_export_decl (var
);
3157 rest_of_decl_compilation (var
, 1, 1);
3162 /* Generate a static constructor (if CONSTRUCTOR_P) or destructor
3163 (otherwise) that will initialize all global objects with static
3164 storage duration having the indicated PRIORITY. */
3167 generate_ctor_or_dtor_function (bool constructor_p
, int priority
,
3176 input_location
= *locus
;
3178 /* Was: locus->line++; */
3180 /* We use `I' to indicate initialization and `D' to indicate
3182 function_key
= constructor_p
? 'I' : 'D';
3184 /* We emit the function lazily, to avoid generating empty
3185 global constructors and destructors. */
3188 /* For Objective-C++, we may need to initialize metadata found in this module.
3189 This must be done _before_ any other static initializations. */
3190 if (c_dialect_objc () && (priority
== DEFAULT_INIT_PRIORITY
)
3191 && constructor_p
&& objc_static_init_needed_p ())
3193 body
= start_objects (function_key
, priority
);
3194 objc_generate_static_init_call (NULL_TREE
);
3197 /* Call the static storage duration function with appropriate
3199 for (i
= 0; VEC_iterate (tree
, ssdf_decls
, i
, fndecl
); ++i
)
3201 /* Calls to pure or const functions will expand to nothing. */
3202 if (! (flags_from_decl_or_type (fndecl
) & (ECF_CONST
| ECF_PURE
)))
3205 body
= start_objects (function_key
, priority
);
3207 arguments
= tree_cons (NULL_TREE
,
3208 build_int_cst (NULL_TREE
, priority
),
3210 arguments
= tree_cons (NULL_TREE
,
3211 build_int_cst (NULL_TREE
, constructor_p
),
3213 finish_expr_stmt (cp_build_function_call (fndecl
, arguments
,
3214 tf_warning_or_error
));
3218 /* Close out the function. */
3220 finish_objects (function_key
, priority
, body
);
3223 /* Generate constructor and destructor functions for the priority
3227 generate_ctor_and_dtor_functions_for_priority (splay_tree_node n
, void * data
)
3229 location_t
*locus
= (location_t
*) data
;
3230 int priority
= (int) n
->key
;
3231 priority_info pi
= (priority_info
) n
->value
;
3233 /* Generate the functions themselves, but only if they are really
3235 if (pi
->initializations_p
)
3236 generate_ctor_or_dtor_function (/*constructor_p=*/true, priority
, locus
);
3237 if (pi
->destructions_p
)
3238 generate_ctor_or_dtor_function (/*constructor_p=*/false, priority
, locus
);
3240 /* Keep iterating. */
3244 /* Called via LANGHOOK_CALLGRAPH_ANALYZE_EXPR. It is supposed to mark
3245 decls referenced from front-end specific constructs; it will be called
3246 only for language-specific tree nodes.
3248 Here we must deal with member pointers. */
3251 cxx_callgraph_analyze_expr (tree
*tp
, int *walk_subtrees ATTRIBUTE_UNUSED
)
3255 switch (TREE_CODE (t
))
3258 if (TYPE_PTRMEMFUNC_P (TREE_TYPE (t
)))
3259 cgraph_mark_address_taken_node (cgraph_node (PTRMEM_CST_MEMBER (t
)));
3262 if (TREE_CODE (BASELINK_FUNCTIONS (t
)) == FUNCTION_DECL
)
3263 cgraph_mark_address_taken_node (cgraph_node (BASELINK_FUNCTIONS (t
)));
3266 if (DECL_VTABLE_OR_VTT_P (t
))
3268 /* The ABI requires that all virtual tables be emitted
3269 whenever one of them is. */
3271 for (vtbl
= CLASSTYPE_VTABLES (DECL_CONTEXT (t
));
3273 vtbl
= TREE_CHAIN (vtbl
))
3274 mark_decl_referenced (vtbl
);
3276 else if (DECL_CONTEXT (t
)
3277 && TREE_CODE (DECL_CONTEXT (t
)) == FUNCTION_DECL
)
3278 /* If we need a static variable in a function, then we
3279 need the containing function. */
3280 mark_decl_referenced (DECL_CONTEXT (t
));
3289 /* Java requires that we be able to reference a local address for a
3290 method, and not be confused by PLT entries. If hidden aliases are
3291 supported, emit one for each java function that we've emitted. */
3294 build_java_method_aliases (void)
3296 struct cgraph_node
*node
;
3298 #ifndef HAVE_GAS_HIDDEN
3302 for (node
= cgraph_nodes
; node
; node
= node
->next
)
3304 tree fndecl
= node
->decl
;
3306 if (TREE_ASM_WRITTEN (fndecl
)
3307 && DECL_CONTEXT (fndecl
)
3308 && TYPE_P (DECL_CONTEXT (fndecl
))
3309 && TYPE_FOR_JAVA (DECL_CONTEXT (fndecl
))
3310 && TARGET_USE_LOCAL_THUNK_ALIAS_P (fndecl
))
3312 /* Mangle the name in a predictable way; we need to reference
3313 this from a java compiled object file. */
3314 tree oid
, nid
, alias
;
3318 oid
= DECL_ASSEMBLER_NAME (fndecl
);
3319 oname
= IDENTIFIER_POINTER (oid
);
3320 gcc_assert (oname
[0] == '_' && oname
[1] == 'Z');
3321 nname
= ACONCAT (("_ZGA", oname
+2, NULL
));
3322 nid
= get_identifier (nname
);
3324 alias
= make_alias_for (fndecl
, nid
);
3325 TREE_PUBLIC (alias
) = 1;
3326 DECL_VISIBILITY (alias
) = VISIBILITY_HIDDEN
;
3328 assemble_alias (alias
, oid
);
3333 /* This routine is called at the end of compilation.
3334 Its job is to create all the code needed to initialize and
3335 destroy the global aggregates. We do the destruction
3336 first, since that way we only need to reverse the decls once. */
3339 cp_write_global_declarations (void)
3345 unsigned ssdf_count
= 0;
3349 locus
= input_location
;
3352 /* Bad parse errors. Just forget about it. */
3353 if (! global_bindings_p () || current_class_type
|| decl_namespace_list
)
3357 c_common_write_pch ();
3359 /* FIXME - huh? was input_line -= 1;*/
3361 /* We now have to write out all the stuff we put off writing out.
3364 o Template specializations that we have not yet instantiated,
3365 but which are needed.
3366 o Initialization and destruction for non-local objects with
3367 static storage duration. (Local objects with static storage
3368 duration are initialized when their scope is first entered,
3369 and are cleaned up via atexit.)
3370 o Virtual function tables.
3372 All of these may cause others to be needed. For example,
3373 instantiating one function may cause another to be needed, and
3374 generating the initializer for an object may cause templates to be
3375 instantiated, etc., etc. */
3377 timevar_push (TV_VARCONST
);
3379 emit_support_tinfos ();
3388 /* If there are templates that we've put off instantiating, do
3390 instantiate_pending_templates (retries
);
3393 /* Write out virtual tables as required. Note that writing out
3394 the virtual table for a template class may cause the
3395 instantiation of members of that class. If we write out
3396 vtables then we remove the class from our list so we don't
3397 have to look at it again. */
3399 while (keyed_classes
!= NULL_TREE
3400 && maybe_emit_vtables (TREE_VALUE (keyed_classes
)))
3403 keyed_classes
= TREE_CHAIN (keyed_classes
);
3409 tree next
= TREE_CHAIN (t
);
3413 if (maybe_emit_vtables (TREE_VALUE (next
)))
3416 TREE_CHAIN (t
) = TREE_CHAIN (next
);
3421 next
= TREE_CHAIN (t
);
3425 /* Write out needed type info variables. We have to be careful
3426 looping through unemitted decls, because emit_tinfo_decl may
3427 cause other variables to be needed. New elements will be
3428 appended, and we remove from the vector those that actually
3430 for (i
= VEC_length (tree
, unemitted_tinfo_decls
);
3431 VEC_iterate (tree
, unemitted_tinfo_decls
, --i
, t
);)
3432 if (emit_tinfo_decl (t
))
3435 VEC_unordered_remove (tree
, unemitted_tinfo_decls
, i
);
3438 /* The list of objects with static storage duration is built up
3439 in reverse order. We clear STATIC_AGGREGATES so that any new
3440 aggregates added during the initialization of these will be
3441 initialized in the correct order when we next come around the
3443 vars
= prune_vars_needing_no_initialization (&static_aggregates
);
3447 /* We need to start a new initialization function each time
3448 through the loop. That's because we need to know which
3449 vtables have been referenced, and TREE_SYMBOL_REFERENCED
3450 isn't computed until a function is finished, and written
3451 out. That's a deficiency in the back end. When this is
3452 fixed, these initialization functions could all become
3453 inline, with resulting performance improvements. */
3456 /* Set the line and file, so that it is obviously not from
3458 input_location
= locus
;
3459 ssdf_body
= start_static_storage_duration_function (ssdf_count
);
3461 /* Make sure the back end knows about all the variables. */
3462 write_out_vars (vars
);
3464 /* First generate code to do all the initializations. */
3466 do_static_initialization_or_destruction (vars
, /*initp=*/true);
3468 /* Then, generate code to do all the destructions. Do these
3469 in reverse order so that the most recently constructed
3470 variable is the first destroyed. If we're using
3471 __cxa_atexit, then we don't need to do this; functions
3472 were registered at initialization time to destroy the
3474 if (!flag_use_cxa_atexit
&& vars
)
3476 vars
= nreverse (vars
);
3477 do_static_initialization_or_destruction (vars
, /*initp=*/false);
3482 /* Finish up the static storage duration function for this
3484 input_location
= locus
;
3485 finish_static_storage_duration_function (ssdf_body
);
3487 /* All those initializations and finalizations might cause
3488 us to need more inline functions, more template
3489 instantiations, etc. */
3492 /* ??? was: locus.line++; */
3495 /* Go through the set of inline functions whose bodies have not
3496 been emitted yet. If out-of-line copies of these functions
3497 are required, emit them. */
3498 for (i
= 0; VEC_iterate (tree
, deferred_fns
, i
, decl
); ++i
)
3500 /* Does it need synthesizing? */
3501 if (DECL_DEFAULTED_FN (decl
) && ! DECL_INITIAL (decl
)
3502 && (! DECL_REALLY_EXTERN (decl
) || possibly_inlined_p (decl
)))
3504 /* Even though we're already at the top-level, we push
3505 there again. That way, when we pop back a few lines
3506 hence, all of our state is restored. Otherwise,
3507 finish_function doesn't clean things up, and we end
3508 up with CURRENT_FUNCTION_DECL set. */
3509 push_to_top_level ();
3510 /* The decl's location will mark where it was first
3511 needed. Save that so synthesize method can indicate
3512 where it was needed from, in case of error */
3513 input_location
= DECL_SOURCE_LOCATION (decl
);
3514 synthesize_method (decl
);
3515 pop_from_top_level ();
3519 if (!gimple_body (decl
))
3522 /* We lie to the back end, pretending that some functions
3523 are not defined when they really are. This keeps these
3524 functions from being put out unnecessarily. But, we must
3525 stop lying when the functions are referenced, or if they
3526 are not comdat since they need to be put out now. If
3527 DECL_INTERFACE_KNOWN, then we have already set
3528 DECL_EXTERNAL appropriately, so there's no need to check
3529 again, and we do not want to clear DECL_EXTERNAL if a
3530 previous call to import_export_decl set it.
3532 This is done in a separate for cycle, because if some
3533 deferred function is contained in another deferred
3534 function later in deferred_fns varray,
3535 rest_of_compilation would skip this function and we
3536 really cannot expand the same function twice. */
3537 import_export_decl (decl
);
3538 if (DECL_NOT_REALLY_EXTERN (decl
)
3539 && DECL_INITIAL (decl
)
3540 && decl_needed_p (decl
))
3541 DECL_EXTERNAL (decl
) = 0;
3543 /* If we're going to need to write this function out, and
3544 there's already a body for it, create RTL for it now.
3545 (There might be no body if this is a method we haven't
3546 gotten around to synthesizing yet.) */
3547 if (!DECL_EXTERNAL (decl
)
3548 && decl_needed_p (decl
)
3549 && !TREE_ASM_WRITTEN (decl
)
3550 && !cgraph_node (decl
)->local
.finalized
)
3552 /* We will output the function; no longer consider it in this
3554 DECL_DEFER_OUTPUT (decl
) = 0;
3555 /* Generate RTL for this function now that we know we
3557 expand_or_defer_fn (decl
);
3558 /* If we're compiling -fsyntax-only pretend that this
3559 function has been written out so that we don't try to
3561 if (flag_syntax_only
)
3562 TREE_ASM_WRITTEN (decl
) = 1;
3567 if (walk_namespaces (wrapup_globals_for_namespace
, /*data=*/0))
3570 /* Static data members are just like namespace-scope globals. */
3571 for (i
= 0; VEC_iterate (tree
, pending_statics
, i
, decl
); ++i
)
3573 if (var_finalized_p (decl
) || DECL_REALLY_EXTERN (decl
)
3574 /* Don't write it out if we haven't seen a definition. */
3575 || DECL_IN_AGGR_P (decl
))
3577 import_export_decl (decl
);
3578 /* If this static data member is needed, provide it to the
3580 if (DECL_NOT_REALLY_EXTERN (decl
) && decl_needed_p (decl
))
3581 DECL_EXTERNAL (decl
) = 0;
3583 if (VEC_length (tree
, pending_statics
) != 0
3584 && wrapup_global_declarations (VEC_address (tree
, pending_statics
),
3585 VEC_length (tree
, pending_statics
)))
3592 /* All used inline functions must have a definition at this point. */
3593 for (i
= 0; VEC_iterate (tree
, deferred_fns
, i
, decl
); ++i
)
3595 if (/* Check online inline functions that were actually used. */
3596 TREE_USED (decl
) && DECL_DECLARED_INLINE_P (decl
)
3597 /* If the definition actually was available here, then the
3598 fact that the function was not defined merely represents
3599 that for some reason (use of a template repository,
3600 #pragma interface, etc.) we decided not to emit the
3602 && !DECL_INITIAL (decl
)
3603 /* An explicit instantiation can be used to specify
3604 that the body is in another unit. It will have
3605 already verified there was a definition. */
3606 && !DECL_EXPLICIT_INSTANTIATION (decl
))
3608 warning (0, "inline function %q+D used but never defined", decl
);
3609 /* Avoid a duplicate warning from check_global_declaration_1. */
3610 TREE_NO_WARNING (decl
) = 1;
3614 /* We give C linkage to static constructors and destructors. */
3615 push_lang_context (lang_name_c
);
3617 /* Generate initialization and destruction functions for all
3618 priorities for which they are required. */
3619 if (priority_info_map
)
3620 splay_tree_foreach (priority_info_map
,
3621 generate_ctor_and_dtor_functions_for_priority
,
3623 else if (c_dialect_objc () && objc_static_init_needed_p ())
3624 /* If this is obj-c++ and we need a static init, call
3625 generate_ctor_or_dtor_function. */
3626 generate_ctor_or_dtor_function (/*constructor_p=*/true,
3627 DEFAULT_INIT_PRIORITY
, &locus
);
3629 /* We're done with the splay-tree now. */
3630 if (priority_info_map
)
3631 splay_tree_delete (priority_info_map
);
3633 /* Generate any missing aliases. */
3634 maybe_apply_pending_pragma_weaks ();
3636 /* We're done with static constructors, so we can go back to "C++"
3638 pop_lang_context ();
3640 cgraph_finalize_compilation_unit ();
3643 /* Now, issue warnings about static, but not defined, functions,
3644 etc., and emit debugging information. */
3645 walk_namespaces (wrapup_globals_for_namespace
, /*data=*/&reconsider
);
3646 if (VEC_length (tree
, pending_statics
) != 0)
3648 check_global_declarations (VEC_address (tree
, pending_statics
),
3649 VEC_length (tree
, pending_statics
));
3650 emit_debug_global_declarations (VEC_address (tree
, pending_statics
),
3651 VEC_length (tree
, pending_statics
));
3654 /* Generate hidden aliases for Java. */
3655 build_java_method_aliases ();
3659 /* The entire file is now complete. If requested, dump everything
3663 FILE *stream
= dump_begin (TDI_tu
, &flags
);
3667 dump_node (global_namespace
, flags
& ~TDF_SLIM
, stream
);
3668 dump_end (TDI_tu
, stream
);
3672 timevar_pop (TV_VARCONST
);
3674 if (flag_detailed_statistics
)
3676 dump_tree_statistics ();
3677 dump_time_statistics ();
3679 input_location
= locus
;
3681 #ifdef ENABLE_CHECKING
3682 validate_conversion_obstack ();
3683 #endif /* ENABLE_CHECKING */
3686 /* FN is an OFFSET_REF, DOTSTAR_EXPR or MEMBER_REF indicating the
3687 function to call in parse-tree form; it has not yet been
3688 semantically analyzed. ARGS are the arguments to the function.
3689 They have already been semantically analyzed. This may change
3693 build_offset_ref_call_from_tree (tree fn
, VEC(tree
,gc
) **args
)
3696 VEC(tree
,gc
) *orig_args
= NULL
;
3701 object
= TREE_OPERAND (fn
, 0);
3703 if (processing_template_decl
)
3705 gcc_assert (TREE_CODE (fn
) == DOTSTAR_EXPR
3706 || TREE_CODE (fn
) == MEMBER_REF
);
3707 if (type_dependent_expression_p (fn
)
3708 || any_type_dependent_arguments_p (*args
))
3709 return build_nt_call_vec (fn
, *args
);
3711 orig_args
= make_tree_vector_copy (*args
);
3713 /* Transform the arguments and add the implicit "this"
3714 parameter. That must be done before the FN is transformed
3715 because we depend on the form of FN. */
3716 make_args_non_dependent (*args
);
3717 object
= build_non_dependent_expr (object
);
3718 if (TREE_CODE (fn
) == DOTSTAR_EXPR
)
3719 object
= cp_build_unary_op (ADDR_EXPR
, object
, 0, tf_warning_or_error
);
3720 VEC_safe_insert (tree
, gc
, *args
, 0, object
);
3721 /* Now that the arguments are done, transform FN. */
3722 fn
= build_non_dependent_expr (fn
);
3725 /* A qualified name corresponding to a bound pointer-to-member is
3726 represented as an OFFSET_REF:
3728 struct B { void g(); };
3730 void B::g() { (this->*p)(); } */
3731 if (TREE_CODE (fn
) == OFFSET_REF
)
3733 tree object_addr
= cp_build_unary_op (ADDR_EXPR
, object
, 0,
3734 tf_warning_or_error
);
3735 fn
= TREE_OPERAND (fn
, 1);
3736 fn
= get_member_function_from_ptrfunc (&object_addr
, fn
);
3737 VEC_safe_insert (tree
, gc
, *args
, 0, object_addr
);
3740 expr
= cp_build_function_call_vec (fn
, args
, tf_warning_or_error
);
3741 if (processing_template_decl
&& expr
!= error_mark_node
)
3742 expr
= build_min_non_dep_call_vec (expr
, orig_fn
, orig_args
);
3744 if (orig_args
!= NULL
)
3745 release_tree_vector (orig_args
);
3752 check_default_args (tree x
)
3754 tree arg
= TYPE_ARG_TYPES (TREE_TYPE (x
));
3755 bool saw_def
= false;
3756 int i
= 0 - (TREE_CODE (TREE_TYPE (x
)) == METHOD_TYPE
);
3757 for (; arg
&& arg
!= void_list_node
; arg
= TREE_CHAIN (arg
), ++i
)
3759 if (TREE_PURPOSE (arg
))
3763 error ("default argument missing for parameter %P of %q+#D", i
, x
);
3764 TREE_PURPOSE (arg
) = error_mark_node
;
3769 /* Return true if function DECL can be inlined. This is used to force
3770 instantiation of methods that might be interesting for inlining. */
3772 possibly_inlined_p (tree decl
)
3774 gcc_assert (TREE_CODE (decl
) == FUNCTION_DECL
);
3775 if (DECL_UNINLINABLE (decl
))
3777 if (!optimize
|| pragma_java_exceptions
)
3778 return DECL_DECLARED_INLINE_P (decl
);
3779 /* When optimizing, we might inline everything when flatten
3780 attribute or heuristics inlining for size or autoinlining
3785 /* Mark DECL (either a _DECL or a BASELINK) as "used" in the program.
3786 If DECL is a specialization or implicitly declared class member,
3787 generate the actual definition. */
3790 mark_used (tree decl
)
3792 HOST_WIDE_INT saved_processing_template_decl
= 0;
3794 /* If DECL is a BASELINK for a single function, then treat it just
3795 like the DECL for the function. Otherwise, if the BASELINK is
3796 for an overloaded function, we don't know which function was
3797 actually used until after overload resolution. */
3798 if (TREE_CODE (decl
) == BASELINK
)
3800 decl
= BASELINK_FUNCTIONS (decl
);
3801 if (really_overloaded_fn (decl
))
3803 decl
= OVL_CURRENT (decl
);
3806 TREE_USED (decl
) = 1;
3807 if (DECL_CLONED_FUNCTION_P (decl
))
3808 TREE_USED (DECL_CLONED_FUNCTION (decl
)) = 1;
3809 if (TREE_CODE (decl
) == FUNCTION_DECL
3810 && DECL_DELETED_FN (decl
))
3812 error ("deleted function %q+D", decl
);
3813 error ("used here");
3816 /* If we don't need a value, then we don't need to synthesize DECL. */
3817 if (cp_unevaluated_operand
!= 0)
3820 /* If within finish_function, defer the rest until that function
3821 finishes, otherwise it might recurse. */
3822 if (defer_mark_used_calls
)
3824 VEC_safe_push (tree
, gc
, deferred_mark_used_calls
, decl
);
3828 /* Normally, we can wait until instantiation-time to synthesize
3829 DECL. However, if DECL is a static data member initialized with
3830 a constant, we need the value right now because a reference to
3831 such a data member is not value-dependent. */
3832 if (TREE_CODE (decl
) == VAR_DECL
3833 && DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl
)
3834 && DECL_CLASS_SCOPE_P (decl
))
3836 /* Don't try to instantiate members of dependent types. We
3837 cannot just use dependent_type_p here because this function
3838 may be called from fold_non_dependent_expr, and then we may
3839 see dependent types, even though processing_template_decl
3841 if (CLASSTYPE_TEMPLATE_INFO ((DECL_CONTEXT (decl
)))
3842 && uses_template_parms (CLASSTYPE_TI_ARGS (DECL_CONTEXT (decl
))))
3844 /* Pretend that we are not in a template, even if we are, so
3845 that the static data member initializer will be processed. */
3846 saved_processing_template_decl
= processing_template_decl
;
3847 processing_template_decl
= 0;
3850 if (processing_template_decl
)
3853 if (TREE_CODE (decl
) == FUNCTION_DECL
&& DECL_DECLARED_INLINE_P (decl
)
3854 && !TREE_ASM_WRITTEN (decl
))
3855 /* Remember it, so we can check it was defined. */
3857 if (DECL_DEFERRED_FN (decl
))
3860 /* Remember the current location for a function we will end up
3861 synthesizing. Then we can inform the user where it was
3862 required in the case of error. */
3863 if (DECL_ARTIFICIAL (decl
) && DECL_NONSTATIC_MEMBER_FUNCTION_P (decl
)
3864 && !DECL_THUNK_P (decl
))
3865 DECL_SOURCE_LOCATION (decl
) = input_location
;
3867 note_vague_linkage_fn (decl
);
3870 /* Is it a synthesized method that needs to be synthesized? */
3871 if (TREE_CODE (decl
) == FUNCTION_DECL
3872 && DECL_NONSTATIC_MEMBER_FUNCTION_P (decl
)
3873 && DECL_DEFAULTED_FN (decl
)
3874 && !DECL_THUNK_P (decl
)
3875 && ! DECL_INITIAL (decl
)
3876 /* Kludge: don't synthesize for default args. Unfortunately this
3877 rules out initializers of namespace-scoped objects too, but
3878 it's sort-of ok if the implicit ctor or dtor decl keeps
3879 pointing to the class location. */
3880 && current_function_decl
)
3882 synthesize_method (decl
);
3883 /* If we've already synthesized the method we don't need to
3884 do the instantiation test below. */
3886 else if ((DECL_NON_THUNK_FUNCTION_P (decl
) || TREE_CODE (decl
) == VAR_DECL
)
3887 && DECL_LANG_SPECIFIC (decl
) && DECL_TEMPLATE_INFO (decl
)
3888 && (!DECL_EXPLICIT_INSTANTIATION (decl
)
3889 || (TREE_CODE (decl
) == FUNCTION_DECL
3890 && possibly_inlined_p
3891 (DECL_TEMPLATE_RESULT (
3892 template_for_substitution (decl
))))
3893 /* We need to instantiate static data members so that there
3894 initializers are available in integral constant
3896 || (TREE_CODE (decl
) == VAR_DECL
3897 && DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl
))))
3898 /* If this is a function or variable that is an instance of some
3899 template, we now know that we will need to actually do the
3900 instantiation. We check that DECL is not an explicit
3901 instantiation because that is not checked in instantiate_decl.
3903 We put off instantiating functions in order to improve compile
3904 times. Maintaining a stack of active functions is expensive,
3905 and the inliner knows to instantiate any functions it might
3906 need. Therefore, we always try to defer instantiation. */
3907 instantiate_decl (decl
, /*defer_ok=*/true,
3908 /*expl_inst_class_mem_p=*/false);
3910 processing_template_decl
= saved_processing_template_decl
;
3913 #include "gt-cp-decl2.h"