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 Free Software Foundation, Inc.
4 Hacked by Michael Tiemann (tiemann@cygnus.com)
6 This file is part of GCC.
8 GCC is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2, or (at your option)
13 GCC is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING. If not, write to
20 the Free Software Foundation, 59 Temple Place - Suite 330,
21 Boston, MA 02111-1307, USA. */
24 /* Process declarations and symbol lookup for C++ front end.
25 Also constructs types; the standard scalar types at initialization,
26 and structure, union, array and enum types when they are declared. */
28 /* ??? not all decl nodes are given the most useful possible
29 line numbers. For example, the CONST_DECLs for enum values. */
33 #include "coretypes.h"
48 #include "tree-mudflap.h"
50 #include "tree-inline.h"
53 extern cpp_reader *parse_in;
55 /* This structure contains information about the initializations
56 and/or destructions required for a particular priority level. */
57 typedef struct priority_info_s {
58 /* Nonzero if there have been any initializations at this priority
59 throughout the translation unit. */
60 int initializations_p;
61 /* Nonzero if there have been any destructions at this priority
62 throughout the translation unit. */
66 static void mark_vtable_entries (tree);
67 static void grok_function_init (tree, tree);
68 static bool maybe_emit_vtables (tree);
69 static tree build_anon_union_vars (tree);
70 static bool acceptable_java_type (tree);
71 static tree start_objects (int, int);
72 static void finish_objects (int, int, tree);
73 static tree start_static_storage_duration_function (unsigned);
74 static void finish_static_storage_duration_function (tree);
75 static priority_info get_priority_info (int);
76 static void do_static_initialization (tree, tree);
77 static void do_static_destruction (tree);
78 static tree start_static_initialization_or_destruction (tree, int);
79 static void finish_static_initialization_or_destruction (tree);
80 static void generate_ctor_or_dtor_function (bool, int, location_t *);
81 static int generate_ctor_and_dtor_functions_for_priority (splay_tree_node,
83 static tree prune_vars_needing_no_initialization (tree *);
84 static void write_out_vars (tree);
85 static void import_export_class (tree);
86 static tree get_guard_bits (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(()) varray_type pending_statics;
92 #define pending_statics_used \
93 (pending_statics ? pending_statics->elements_used : 0)
95 /* A list of functions which were declared inline, but which we
96 may need to emit outline anyway. */
97 static GTY(()) varray_type deferred_fns;
98 #define deferred_fns_used \
99 (deferred_fns ? deferred_fns->elements_used : 0)
101 /* Flag used when debugging spew.c */
103 extern int spew_debug;
105 /* Nonzero if we're done parsing and into end-of-file activities. */
109 /* Functions called along with real static constructors and destructors. */
115 /* Incorporate `const' and `volatile' qualifiers for member functions.
116 FUNCTION is a TYPE_DECL or a FUNCTION_DECL.
117 QUALS is a list of qualifiers. Returns any explicit
118 top-level qualifiers of the method's this pointer, anything other than
119 TYPE_UNQUALIFIED will be an extension. */
122 grok_method_quals (tree ctype, tree function, cp_cv_quals quals)
124 tree fntype = TREE_TYPE (function);
125 tree raises = TYPE_RAISES_EXCEPTIONS (fntype);
126 int type_quals = TYPE_UNQUALIFIED;
127 int this_quals = TYPE_UNQUALIFIED;
129 type_quals = quals & ~TYPE_QUAL_RESTRICT;
130 this_quals = quals & TYPE_QUAL_RESTRICT;
132 ctype = cp_build_qualified_type (ctype, type_quals);
133 fntype = build_method_type_directly (ctype, TREE_TYPE (fntype),
134 (TREE_CODE (fntype) == METHOD_TYPE
135 ? TREE_CHAIN (TYPE_ARG_TYPES (fntype))
136 : TYPE_ARG_TYPES (fntype)));
138 fntype = build_exception_variant (fntype, raises);
140 TREE_TYPE (function) = fntype;
144 /* Build a PARM_DECL with NAME and TYPE, and set DECL_ARG_TYPE
148 cp_build_parm_decl (tree name, tree type)
150 tree parm = build_decl (PARM_DECL, name, type);
151 /* DECL_ARG_TYPE is only used by the back end and the back end never
153 if (!processing_template_decl)
154 DECL_ARG_TYPE (parm) = type_passed_as (type);
158 /* Returns a PARM_DECL for a parameter of the indicated TYPE, with the
162 build_artificial_parm (tree name, tree type)
164 tree parm = cp_build_parm_decl (name, type);
165 DECL_ARTIFICIAL (parm) = 1;
166 /* All our artificial parms are implicitly `const'; they cannot be
168 TREE_READONLY (parm) = 1;
172 /* Constructors for types with virtual baseclasses need an "in-charge" flag
173 saying whether this constructor is responsible for initialization of
174 virtual baseclasses or not. All destructors also need this "in-charge"
175 flag, which additionally determines whether or not the destructor should
176 free the memory for the object.
178 This function adds the "in-charge" flag to member function FN if
179 appropriate. It is called from grokclassfn and tsubst.
180 FN must be either a constructor or destructor.
182 The in-charge flag follows the 'this' parameter, and is followed by the
183 VTT parm (if any), then the user-written parms. */
186 maybe_retrofit_in_chrg (tree fn)
188 tree basetype, arg_types, parms, parm, fntype;
190 /* If we've already add the in-charge parameter don't do it again. */
191 if (DECL_HAS_IN_CHARGE_PARM_P (fn))
194 /* When processing templates we can't know, in general, whether or
195 not we're going to have virtual baseclasses. */
196 if (processing_template_decl)
199 /* We don't need an in-charge parameter for constructors that don't
200 have virtual bases. */
201 if (DECL_CONSTRUCTOR_P (fn)
202 && !CLASSTYPE_VBASECLASSES (DECL_CONTEXT (fn)))
205 arg_types = TYPE_ARG_TYPES (TREE_TYPE (fn));
206 basetype = TREE_TYPE (TREE_VALUE (arg_types));
207 arg_types = TREE_CHAIN (arg_types);
209 parms = TREE_CHAIN (DECL_ARGUMENTS (fn));
211 /* If this is a subobject constructor or destructor, our caller will
212 pass us a pointer to our VTT. */
213 if (CLASSTYPE_VBASECLASSES (DECL_CONTEXT (fn)))
215 parm = build_artificial_parm (vtt_parm_identifier, vtt_parm_type);
217 /* First add it to DECL_ARGUMENTS between 'this' and the real args... */
218 TREE_CHAIN (parm) = parms;
221 /* ...and then to TYPE_ARG_TYPES. */
222 arg_types = hash_tree_chain (vtt_parm_type, arg_types);
224 DECL_HAS_VTT_PARM_P (fn) = 1;
227 /* Then add the in-charge parm (before the VTT parm). */
228 parm = build_artificial_parm (in_charge_identifier, integer_type_node);
229 TREE_CHAIN (parm) = parms;
231 arg_types = hash_tree_chain (integer_type_node, arg_types);
233 /* Insert our new parameter(s) into the list. */
234 TREE_CHAIN (DECL_ARGUMENTS (fn)) = parms;
236 /* And rebuild the function type. */
237 fntype = build_method_type_directly (basetype, TREE_TYPE (TREE_TYPE (fn)),
239 if (TYPE_RAISES_EXCEPTIONS (TREE_TYPE (fn)))
240 fntype = build_exception_variant (fntype,
241 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (fn)));
242 TREE_TYPE (fn) = fntype;
244 /* Now we've got the in-charge parameter. */
245 DECL_HAS_IN_CHARGE_PARM_P (fn) = 1;
248 /* Classes overload their constituent function names automatically.
249 When a function name is declared in a record structure,
250 its name is changed to it overloaded name. Since names for
251 constructors and destructors can conflict, we place a leading
254 CNAME is the name of the class we are grokking for.
256 FUNCTION is a FUNCTION_DECL. It was created by `grokdeclarator'.
258 FLAGS contains bits saying what's special about today's
259 arguments. 1 == DESTRUCTOR. 2 == OPERATOR.
261 If FUNCTION is a destructor, then we must add the `auto-delete' field
262 as a second parameter. There is some hair associated with the fact
263 that we must "declare" this variable in the manner consistent with the
264 way the rest of the arguments were declared.
266 QUALS are the qualifiers for the this pointer. */
269 grokclassfn (tree ctype, tree function, enum overload_flags flags,
272 tree fn_name = DECL_NAME (function);
273 cp_cv_quals this_quals = TYPE_UNQUALIFIED;
275 /* Even within an `extern "C"' block, members get C++ linkage. See
276 [dcl.link] for details. */
277 SET_DECL_LANGUAGE (function, lang_cplusplus);
279 if (fn_name == NULL_TREE)
281 error ("name missing for member function");
282 fn_name = get_identifier ("<anonymous>");
283 DECL_NAME (function) = fn_name;
287 this_quals = grok_method_quals (ctype, function, quals);
289 if (TREE_CODE (TREE_TYPE (function)) == METHOD_TYPE)
291 /* Must add the class instance variable up front. */
292 /* Right now we just make this a pointer. But later
293 we may wish to make it special. */
294 tree type = TREE_VALUE (TYPE_ARG_TYPES (TREE_TYPE (function)));
298 /* The `this' parameter is implicitly `const'; it cannot be
300 this_quals |= TYPE_QUAL_CONST;
301 qual_type = cp_build_qualified_type (type, this_quals);
302 parm = build_artificial_parm (this_identifier, qual_type);
303 c_apply_type_quals_to_decl (this_quals, parm);
304 TREE_CHAIN (parm) = DECL_ARGUMENTS (function);
305 DECL_ARGUMENTS (function) = parm;
308 DECL_CONTEXT (function) = ctype;
310 if (flags == DTOR_FLAG)
311 DECL_DESTRUCTOR_P (function) = 1;
313 if (flags == DTOR_FLAG || DECL_CONSTRUCTOR_P (function))
314 maybe_retrofit_in_chrg (function);
317 /* Create an ARRAY_REF, checking for the user doing things backwards
321 grok_array_decl (tree array_expr, tree index_exp)
325 tree orig_array_expr = array_expr;
326 tree orig_index_exp = index_exp;
328 if (error_operand_p (array_expr) || error_operand_p (index_exp))
329 return error_mark_node;
331 if (processing_template_decl)
333 if (type_dependent_expression_p (array_expr)
334 || type_dependent_expression_p (index_exp))
335 return build_min_nt (ARRAY_REF, array_expr, index_exp,
336 NULL_TREE, NULL_TREE);
337 array_expr = build_non_dependent_expr (array_expr);
338 index_exp = build_non_dependent_expr (index_exp);
341 type = TREE_TYPE (array_expr);
343 type = non_reference (type);
345 /* If they have an `operator[]', use that. */
346 if (IS_AGGR_TYPE (type) || IS_AGGR_TYPE (TREE_TYPE (index_exp)))
347 expr = build_new_op (ARRAY_REF, LOOKUP_NORMAL,
348 array_expr, index_exp, NULL_TREE,
349 /*overloaded_p=*/NULL);
354 /* Otherwise, create an ARRAY_REF for a pointer or array type.
355 It is a little-known fact that, if `a' is an array and `i' is
356 an int, you can write `i[a]', which means the same thing as
358 if (TREE_CODE (type) == ARRAY_TYPE)
361 p1 = build_expr_type_conversion (WANT_POINTER, array_expr, false);
363 if (TREE_CODE (TREE_TYPE (index_exp)) == ARRAY_TYPE)
366 p2 = build_expr_type_conversion (WANT_POINTER, index_exp, false);
368 i1 = build_expr_type_conversion (WANT_INT | WANT_ENUM, array_expr,
370 i2 = build_expr_type_conversion (WANT_INT | WANT_ENUM, index_exp,
373 if ((p1 && i2) && (i1 && p2))
374 error ("ambiguous conversion for array subscript");
377 array_expr = p1, index_exp = i2;
379 array_expr = p2, index_exp = i1;
382 error ("invalid types %<%T[%T]%> for array subscript",
383 type, TREE_TYPE (index_exp));
384 return error_mark_node;
387 if (array_expr == error_mark_node || index_exp == error_mark_node)
388 error ("ambiguous conversion for array subscript");
390 expr = build_array_ref (array_expr, index_exp);
392 if (processing_template_decl && expr != error_mark_node)
393 return build_min_non_dep (ARRAY_REF, expr, orig_array_expr, orig_index_exp,
394 NULL_TREE, NULL_TREE);
398 /* Given the cast expression EXP, checking out its validity. Either return
399 an error_mark_node if there was an unavoidable error, return a cast to
400 void for trying to delete a pointer w/ the value 0, or return the
401 call to delete. If DOING_VEC is true, we handle things differently
402 for doing an array delete.
403 Implements ARM $5.3.4. This is called from the parser. */
406 delete_sanity (tree exp, tree size, bool doing_vec, int use_global_delete)
410 if (exp == error_mark_node)
413 if (processing_template_decl)
415 t = build_min (DELETE_EXPR, void_type_node, exp, size);
416 DELETE_EXPR_USE_GLOBAL (t) = use_global_delete;
417 DELETE_EXPR_USE_VEC (t) = doing_vec;
418 TREE_SIDE_EFFECTS (t) = 1;
422 exp = convert_from_reference (exp);
424 /* An array can't have been allocated by new, so complain. */
425 if (TREE_CODE (exp) == VAR_DECL
426 && TREE_CODE (TREE_TYPE (exp)) == ARRAY_TYPE)
427 warning ("deleting array %q#D", exp);
429 t = build_expr_type_conversion (WANT_POINTER, exp, true);
431 if (t == NULL_TREE || t == error_mark_node)
433 error ("type %q#T argument given to %<delete%>, expected pointer",
435 return error_mark_node;
438 type = TREE_TYPE (t);
440 /* As of Valley Forge, you can delete a pointer to const. */
442 /* You can't delete functions. */
443 if (TREE_CODE (TREE_TYPE (type)) == FUNCTION_TYPE)
445 error ("cannot delete a function. Only pointer-to-objects are "
446 "valid arguments to %<delete%>");
447 return error_mark_node;
450 /* Deleting ptr to void is undefined behavior [expr.delete/3]. */
451 if (TREE_CODE (TREE_TYPE (type)) == VOID_TYPE)
453 warning ("deleting %qT is undefined", type);
457 /* Deleting a pointer with the value zero is valid and has no effect. */
458 if (integer_zerop (t))
459 return build1 (NOP_EXPR, void_type_node, t);
462 return build_vec_delete (t, /*maxindex=*/NULL_TREE,
463 sfk_deleting_destructor,
466 return build_delete (type, t, sfk_deleting_destructor,
467 LOOKUP_NORMAL, use_global_delete);
470 /* Report an error if the indicated template declaration is not the
471 sort of thing that should be a member template. */
474 check_member_template (tree tmpl)
478 gcc_assert (TREE_CODE (tmpl) == TEMPLATE_DECL);
479 decl = DECL_TEMPLATE_RESULT (tmpl);
481 if (TREE_CODE (decl) == FUNCTION_DECL
482 || (TREE_CODE (decl) == TYPE_DECL
483 && IS_AGGR_TYPE (TREE_TYPE (decl))))
485 if (current_function_decl)
486 /* 14.5.2.2 [temp.mem]
488 A local class shall not have member templates. */
489 error ("invalid declaration of member template %q#D in local class",
492 if (TREE_CODE (decl) == FUNCTION_DECL && DECL_VIRTUAL_P (decl))
494 /* 14.5.2.3 [temp.mem]
496 A member function template shall not be virtual. */
498 ("invalid use of %<virtual%> in template declaration of %q#D",
500 DECL_VIRTUAL_P (decl) = 0;
503 /* The debug-information generating code doesn't know what to do
504 with member templates. */
505 DECL_IGNORED_P (tmpl) = 1;
508 error ("template declaration of %q#D", decl);
511 /* Return true iff TYPE is a valid Java parameter or return type. */
514 acceptable_java_type (tree type)
516 if (TREE_CODE (type) == VOID_TYPE || TYPE_FOR_JAVA (type))
518 if (TREE_CODE (type) == POINTER_TYPE || TREE_CODE (type) == REFERENCE_TYPE)
520 type = TREE_TYPE (type);
521 if (TREE_CODE (type) == RECORD_TYPE)
524 if (! TYPE_FOR_JAVA (type))
526 if (! CLASSTYPE_TEMPLATE_INFO (type))
528 args = CLASSTYPE_TI_ARGS (type);
529 i = TREE_VEC_LENGTH (args);
532 type = TREE_VEC_ELT (args, i);
533 if (TREE_CODE (type) == POINTER_TYPE)
534 type = TREE_TYPE (type);
535 if (! TYPE_FOR_JAVA (type))
544 /* For a METHOD in a Java class CTYPE, return true if
545 the parameter and return types are valid Java types.
546 Otherwise, print appropriate error messages, and return false. */
549 check_java_method (tree method)
552 tree arg_types = TYPE_ARG_TYPES (TREE_TYPE (method));
553 tree ret_type = TREE_TYPE (TREE_TYPE (method));
555 if (!acceptable_java_type (ret_type))
557 error ("Java method %qD has non-Java return type %qT",
562 arg_types = TREE_CHAIN (arg_types);
563 if (DECL_HAS_IN_CHARGE_PARM_P (method))
564 arg_types = TREE_CHAIN (arg_types);
565 if (DECL_HAS_VTT_PARM_P (method))
566 arg_types = TREE_CHAIN (arg_types);
568 for (; arg_types != NULL_TREE; arg_types = TREE_CHAIN (arg_types))
570 tree type = TREE_VALUE (arg_types);
571 if (!acceptable_java_type (type))
573 error ("Java method %qD has non-Java parameter type %qT",
581 /* Sanity check: report error if this function FUNCTION is not
582 really a member of the class (CTYPE) it is supposed to belong to.
583 TEMPLATE_PARMS is used to specify the template parameters of a member
584 template passed as FUNCTION_DECL. If the member template is passed as a
585 TEMPLATE_DECL, it can be NULL since the parameters can be extracted
586 from the declaration. If the function is not a function template, it
588 It returns the original declaration for the function, or NULL_TREE
589 if no declaration was found (and an error was emitted). */
592 check_classfn (tree ctype, tree function, tree template_parms)
597 if (DECL_USE_TEMPLATE (function)
598 && !(TREE_CODE (function) == TEMPLATE_DECL
599 && DECL_TEMPLATE_SPECIALIZATION (function))
600 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (function)))
601 /* Since this is a specialization of a member template,
602 we're not going to find the declaration in the class.
605 struct S { template <typename T> void f(T); };
606 template <> void S::f(int);
608 we're not going to find `S::f(int)', but there's no
609 reason we should, either. We let our callers know we didn't
610 find the method, but we don't complain. */
613 /* Basic sanity check: for a template function, the template parameters
614 either were not passed, or they are the same of DECL_TEMPLATE_PARMS. */
615 if (TREE_CODE (function) == TEMPLATE_DECL)
617 gcc_assert (!template_parms
618 || comp_template_parms (template_parms,
619 DECL_TEMPLATE_PARMS (function)));
620 template_parms = DECL_TEMPLATE_PARMS (function);
623 /* OK, is this a definition of a member template? */
624 is_template = (template_parms != NULL_TREE);
626 ix = class_method_index_for_fn (complete_type (ctype), function);
629 VEC(tree) *methods = CLASSTYPE_METHOD_VEC (ctype);
630 tree fndecls, fndecl = 0;
633 const char *format = NULL;
635 pop_p = push_scope (ctype);
636 for (fndecls = VEC_index (tree, methods, ix);
637 fndecls; fndecls = OVL_NEXT (fndecls))
641 fndecl = OVL_CURRENT (fndecls);
642 p1 = TYPE_ARG_TYPES (TREE_TYPE (function));
643 p2 = TYPE_ARG_TYPES (TREE_TYPE (fndecl));
645 /* We cannot simply call decls_match because this doesn't
646 work for static member functions that are pretending to
647 be methods, and because the name may have been changed by
650 /* Get rid of the this parameter on functions that become
652 if (DECL_STATIC_FUNCTION_P (fndecl)
653 && TREE_CODE (TREE_TYPE (function)) == METHOD_TYPE)
654 p1 = TREE_CHAIN (p1);
656 /* A member template definition only matches a member template
658 if (is_template != (TREE_CODE (fndecl) == TEMPLATE_DECL))
661 if (same_type_p (TREE_TYPE (TREE_TYPE (function)),
662 TREE_TYPE (TREE_TYPE (fndecl)))
663 && compparms (p1, p2)
665 || comp_template_parms (template_parms,
666 DECL_TEMPLATE_PARMS (fndecl)))
667 && (DECL_TEMPLATE_SPECIALIZATION (function)
668 == DECL_TEMPLATE_SPECIALIZATION (fndecl))
669 && (!DECL_TEMPLATE_SPECIALIZATION (function)
670 || (DECL_TI_TEMPLATE (function)
671 == DECL_TI_TEMPLATE (fndecl))))
677 return OVL_CURRENT (fndecls);
678 error ("prototype for %q#D does not match any in class %qT",
680 is_conv_op = DECL_CONV_FN_P (fndecl);
683 ix = CLASSTYPE_FIRST_CONVERSION_SLOT;
684 fndecls = VEC_index (tree, methods, ix);
687 fndecl = OVL_CURRENT (fndecls);
688 fndecls = OVL_NEXT (fndecls);
690 if (!fndecls && is_conv_op)
692 if (VEC_length (tree, methods) > (size_t) ++ix)
694 fndecls = VEC_index (tree, methods, ix);
695 if (!DECL_CONV_FN_P (OVL_CURRENT (fndecls)))
707 format = "candidates are: %#D";
709 format = "candidate is: %#D";
710 cp_error_at (format, fndecl);
713 else if (!COMPLETE_TYPE_P (ctype))
714 cxx_incomplete_type_error (function, ctype);
716 error ("no %q#D member function declared in class %qT",
719 /* If we did not find the method in the class, add it to avoid
720 spurious errors (unless the CTYPE is not yet defined, in which
721 case we'll only confuse ourselves when the function is declared
722 properly within the class. */
723 if (COMPLETE_TYPE_P (ctype))
724 add_method (ctype, function);
728 /* DECL is a function with vague linkage. Remember it so that at the
729 end of the translation unit we can decide whether or not to emit
733 note_vague_linkage_fn (tree decl)
735 if (!DECL_DEFERRED_FN (decl))
737 DECL_DEFERRED_FN (decl) = 1;
738 DECL_DEFER_OUTPUT (decl) = 1;
740 VARRAY_TREE_INIT (deferred_fns, 32, "deferred_fns");
741 VARRAY_PUSH_TREE (deferred_fns, decl);
745 /* Like note_vague_linkage_fn but for variables. */
748 note_vague_linkage_var (tree var)
750 if (!pending_statics)
751 VARRAY_TREE_INIT (pending_statics, 32, "pending_statics");
752 VARRAY_PUSH_TREE (pending_statics, var);
755 /* We have just processed the DECL, which is a static data member.
756 Its initializer, if present, is INIT. The ASMSPEC_TREE, if
757 present, is the assembly-language name for the data member.
758 FLAGS is as for cp_finish_decl. */
761 finish_static_data_member_decl (tree decl, tree init, tree asmspec_tree,
764 gcc_assert (TREE_PUBLIC (decl));
766 DECL_CONTEXT (decl) = current_class_type;
768 /* We cannot call pushdecl here, because that would fill in the
769 TREE_CHAIN of our decl. Instead, we modify cp_finish_decl to do
770 the right thing, namely, to put this decl out straight away. */
771 /* current_class_type can be NULL_TREE in case of error. */
772 if (!asmspec_tree && current_class_type)
773 DECL_INITIAL (decl) = error_mark_node;
775 if (! processing_template_decl)
776 note_vague_linkage_var (decl);
778 if (LOCAL_CLASS_P (current_class_type))
779 pedwarn ("local class %q#T shall not have static data member %q#D",
780 current_class_type, decl);
782 /* Static consts need not be initialized in the class definition. */
783 if (init != NULL_TREE && TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl)))
785 static int explained = 0;
787 error ("initializer invalid for static member with constructor");
790 error ("(an out of class initialization is required)");
795 /* Force the compiler to know when an uninitialized static const
796 member is being used. */
797 if (CP_TYPE_CONST_P (TREE_TYPE (decl)) && init == 0)
798 TREE_USED (decl) = 1;
799 DECL_INITIAL (decl) = init;
800 DECL_IN_AGGR_P (decl) = 1;
802 cp_finish_decl (decl, init, asmspec_tree, flags);
805 /* Process the specs, declarator (NULL if omitted) and width (NULL if omitted)
806 of a structure component, returning a _DECL node.
807 QUALS is a list of type qualifiers for this decl (such as for declaring
808 const member functions).
810 This is done during the parsing of the struct declaration.
811 The _DECL nodes are chained together and the lot of them
812 are ultimately passed to `build_struct' to make the RECORD_TYPE node.
814 If class A defines that certain functions in class B are friends, then
815 the way I have set things up, it is B who is interested in permission
816 granted by A. However, it is in A's context that these declarations
817 are parsed. By returning a void_type_node, class A does not attempt
818 to incorporate the declarations of the friends within its structure.
820 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
821 CHANGES TO CODE IN `start_method'. */
824 grokfield (const cp_declarator *declarator,
825 cp_decl_specifier_seq *declspecs,
826 tree init, tree asmspec_tree,
830 const char *asmspec = 0;
831 int flags = LOOKUP_ONLYCONVERTING;
833 if (!declspecs->any_specifiers_p
834 && declarator->kind == cdk_id
835 && TREE_CODE (declarator->u.id.name) == SCOPE_REF
836 && (TREE_CODE (TREE_OPERAND (declarator->u.id.name, 1))
838 /* Access declaration */
839 return do_class_using_decl (declarator->u.id.name);
842 && TREE_CODE (init) == TREE_LIST
843 && TREE_VALUE (init) == error_mark_node
844 && TREE_CHAIN (init) == NULL_TREE)
847 value = grokdeclarator (declarator, declspecs, FIELD, init != 0, &attrlist);
848 if (! value || error_operand_p (value))
849 /* friend or constructor went bad. */
850 return error_mark_node;
852 if (TREE_CODE (value) == TYPE_DECL && init)
854 error ("typedef %qD is initialized (use __typeof__ instead)", value);
858 /* Pass friendly classes back. */
859 if (value == void_type_node)
862 /* Pass friend decls back. */
863 if ((TREE_CODE (value) == FUNCTION_DECL
864 || TREE_CODE (value) == TEMPLATE_DECL)
865 && DECL_CONTEXT (value) != current_class_type)
868 if (DECL_NAME (value) != NULL_TREE
869 && IDENTIFIER_POINTER (DECL_NAME (value))[0] == '_'
870 && ! strcmp (IDENTIFIER_POINTER (DECL_NAME (value)), "_vptr"))
871 error ("member %qD conflicts with virtual function table field name",
874 /* Stash away type declarations. */
875 if (TREE_CODE (value) == TYPE_DECL)
877 DECL_NONLOCAL (value) = 1;
878 DECL_CONTEXT (value) = current_class_type;
880 if (processing_template_decl)
881 value = push_template_decl (value);
884 cplus_decl_attributes (&value, attrlist, 0);
889 if (DECL_IN_AGGR_P (value))
891 error ("%qD is already defined in %qT", value, DECL_CONTEXT (value));
892 return void_type_node;
896 asmspec = TREE_STRING_POINTER (asmspec_tree);
900 if (TREE_CODE (value) == FUNCTION_DECL)
902 grok_function_init (value, init);
905 else if (pedantic && TREE_CODE (value) != VAR_DECL)
906 /* Already complained in grokdeclarator. */
910 /* We allow initializers to become parameters to base
912 if (TREE_CODE (init) == TREE_LIST)
914 if (TREE_CHAIN (init) == NULL_TREE)
915 init = TREE_VALUE (init);
917 init = digest_init (TREE_TYPE (value), init, (tree *)0);
920 if (!processing_template_decl)
922 if (TREE_CODE (init) == CONST_DECL)
923 init = DECL_INITIAL (init);
924 else if (TREE_READONLY_DECL_P (init))
925 init = decl_constant_value (init);
926 else if (TREE_CODE (init) == CONSTRUCTOR)
927 init = digest_init (TREE_TYPE (value), init, (tree *)0);
928 if (init != error_mark_node && ! TREE_CONSTANT (init))
930 /* We can allow references to things that are effectively
931 static, since references are initialized with the
933 if (TREE_CODE (TREE_TYPE (value)) != REFERENCE_TYPE
934 || (TREE_STATIC (init) == 0
935 && (!DECL_P (init) || DECL_EXTERNAL (init) == 0)))
937 error ("field initializer is not constant");
938 init = error_mark_node;
945 if (processing_template_decl
946 && (TREE_CODE (value) == VAR_DECL || TREE_CODE (value) == FUNCTION_DECL))
948 value = push_template_decl (value);
949 if (error_operand_p (value))
950 return error_mark_node;
954 cplus_decl_attributes (&value, attrlist, 0);
956 switch (TREE_CODE (value))
959 finish_static_data_member_decl (value, init, asmspec_tree,
965 error ("%<asm%> specifiers are not permitted on non-static data members");
966 if (DECL_INITIAL (value) == error_mark_node)
967 init = error_mark_node;
968 cp_finish_decl (value, init, NULL_TREE, flags);
969 DECL_INITIAL (value) = init;
970 DECL_IN_AGGR_P (value) = 1;
975 set_user_assembler_name (value, asmspec);
976 if (!DECL_FRIEND_P (value))
977 grok_special_member_properties (value);
979 cp_finish_decl (value, init, asmspec_tree, flags);
981 /* Pass friends back this way. */
982 if (DECL_FRIEND_P (value))
983 return void_type_node;
985 DECL_IN_AGGR_P (value) = 1;
994 /* Like `grokfield', but for bitfields.
995 WIDTH is non-NULL for bit fields only, and is an INTEGER_CST node. */
998 grokbitfield (const cp_declarator *declarator,
999 cp_decl_specifier_seq *declspecs, tree width)
1001 tree value = grokdeclarator (declarator, declspecs, BITFIELD, 0, NULL);
1003 if (! value) return NULL_TREE; /* friends went bad. */
1005 /* Pass friendly classes back. */
1006 if (TREE_CODE (value) == VOID_TYPE)
1007 return void_type_node;
1009 if (TREE_CODE (value) == TYPE_DECL)
1011 error ("cannot declare %qD to be a bit-field type", value);
1015 /* Usually, finish_struct_1 catches bitfields with invalid types.
1016 But, in the case of bitfields with function type, we confuse
1017 ourselves into thinking they are member functions, so we must
1019 if (TREE_CODE (value) == FUNCTION_DECL)
1021 error ("cannot declare bit-field %qD with function type",
1026 if (DECL_IN_AGGR_P (value))
1028 error ("%qD is already defined in the class %qT", value,
1029 DECL_CONTEXT (value));
1030 return void_type_node;
1033 if (TREE_STATIC (value))
1035 error ("static member %qD cannot be a bit-field", value);
1038 cp_finish_decl (value, NULL_TREE, NULL_TREE, 0);
1040 if (width != error_mark_node)
1042 constant_expression_warning (width);
1043 DECL_INITIAL (value) = width;
1044 SET_DECL_C_BIT_FIELD (value);
1047 DECL_IN_AGGR_P (value) = 1;
1051 /* When a function is declared with an initializer,
1052 do the right thing. Currently, there are two possibilities:
1057 // initialization possibility #1.
1058 virtual void f () = 0;
1080 // initialization possibility #2
1087 grok_function_init (tree decl, tree init)
1089 /* An initializer for a function tells how this function should
1091 tree type = TREE_TYPE (decl);
1093 if (TREE_CODE (type) == FUNCTION_TYPE)
1094 error ("initializer specified for non-member function %qD", decl);
1095 else if (integer_zerop (init))
1096 DECL_PURE_VIRTUAL_P (decl) = 1;
1098 error ("invalid initializer for virtual method %qD", decl);
1102 cplus_decl_attributes (tree *decl, tree attributes, int flags)
1104 if (*decl == NULL_TREE || *decl == void_type_node)
1107 if (TREE_CODE (*decl) == TEMPLATE_DECL)
1108 decl = &DECL_TEMPLATE_RESULT (*decl);
1110 decl_attributes (decl, attributes, flags);
1112 if (TREE_CODE (*decl) == TYPE_DECL)
1113 SET_IDENTIFIER_TYPE_VALUE (DECL_NAME (*decl), TREE_TYPE (*decl));
1116 /* Walks through the namespace- or function-scope anonymous union OBJECT,
1117 building appropriate ALIAS_DECLs. Returns one of the fields for use in
1118 the mangled name. */
1121 build_anon_union_vars (tree object)
1123 tree type = TREE_TYPE (object);
1124 tree main_decl = NULL_TREE;
1127 /* Rather than write the code to handle the non-union case,
1128 just give an error. */
1129 if (TREE_CODE (type) != UNION_TYPE)
1130 error ("anonymous struct not inside named type");
1132 for (field = TYPE_FIELDS (type);
1134 field = TREE_CHAIN (field))
1139 if (DECL_ARTIFICIAL (field))
1141 if (TREE_CODE (field) != FIELD_DECL)
1143 cp_pedwarn_at ("%q#D invalid; an anonymous union can only "
1144 "have non-static data members",
1149 if (TREE_PRIVATE (field))
1150 cp_pedwarn_at ("private member %q#D in anonymous union", field);
1151 else if (TREE_PROTECTED (field))
1152 cp_pedwarn_at ("protected member %q#D in anonymous union", field);
1154 if (processing_template_decl)
1155 ref = build_min_nt (COMPONENT_REF, object,
1156 DECL_NAME (field), NULL_TREE);
1158 ref = build_class_member_access_expr (object, field, NULL_TREE,
1161 if (DECL_NAME (field))
1163 decl = build_decl (ALIAS_DECL, DECL_NAME (field), TREE_TYPE (field));
1164 DECL_INITIAL (decl) = ref;
1165 TREE_PUBLIC (decl) = 0;
1166 TREE_STATIC (decl) = 0;
1167 DECL_EXTERNAL (decl) = 1;
1168 decl = pushdecl (decl);
1170 else if (ANON_AGGR_TYPE_P (TREE_TYPE (field)))
1171 decl = build_anon_union_vars (ref);
1175 if (main_decl == NULL_TREE)
1182 /* Finish off the processing of a UNION_TYPE structure. If the union is an
1183 anonymous union, then all members must be laid out together. PUBLIC_P
1184 is nonzero if this union is not declared static. */
1187 finish_anon_union (tree anon_union_decl)
1193 if (anon_union_decl == error_mark_node)
1196 type = TREE_TYPE (anon_union_decl);
1197 public_p = TREE_PUBLIC (anon_union_decl);
1199 /* The VAR_DECL's context is the same as the TYPE's context. */
1200 DECL_CONTEXT (anon_union_decl) = DECL_CONTEXT (TYPE_NAME (type));
1202 if (TYPE_FIELDS (type) == NULL_TREE)
1207 error ("namespace-scope anonymous aggregates must be static");
1211 main_decl = build_anon_union_vars (anon_union_decl);
1212 if (main_decl == NULL_TREE)
1214 warning ("anonymous union with no members");
1218 if (!processing_template_decl)
1220 /* Use main_decl to set the mangled name. */
1221 DECL_NAME (anon_union_decl) = DECL_NAME (main_decl);
1222 mangle_decl (anon_union_decl);
1223 DECL_NAME (anon_union_decl) = NULL_TREE;
1226 pushdecl (anon_union_decl);
1227 if (building_stmt_tree ()
1228 && at_function_scope_p ())
1229 add_decl_expr (anon_union_decl);
1230 else if (!processing_template_decl)
1231 rest_of_decl_compilation (anon_union_decl,
1232 toplevel_bindings_p (), at_eof);
1235 /* Auxiliary functions to make type signatures for
1236 `operator new' and `operator delete' correspond to
1237 what compiler will be expecting. */
1240 coerce_new_type (tree type)
1243 tree args = TYPE_ARG_TYPES (type);
1245 gcc_assert (TREE_CODE (type) == FUNCTION_TYPE);
1247 if (!same_type_p (TREE_TYPE (type), ptr_type_node))
1250 error ("%<operator new%> must return type %qT", ptr_type_node);
1253 if (!args || args == void_list_node
1254 || !same_type_p (TREE_VALUE (args), size_type_node))
1257 if (args && args != void_list_node)
1258 args = TREE_CHAIN (args);
1259 pedwarn ("%<operator new%> takes type %<size_t%> (%qT) "
1260 "as first parameter", size_type_node);
1265 args = tree_cons (NULL_TREE, size_type_node, args);
1268 type = build_exception_variant
1269 (build_function_type (ptr_type_node, args),
1270 TYPE_RAISES_EXCEPTIONS (type));
1278 coerce_delete_type (tree type)
1281 tree args = TYPE_ARG_TYPES (type);
1283 gcc_assert (TREE_CODE (type) == FUNCTION_TYPE);
1285 if (!same_type_p (TREE_TYPE (type), void_type_node))
1288 error ("%<operator delete%> must return type %qT", void_type_node);
1291 if (!args || args == void_list_node
1292 || !same_type_p (TREE_VALUE (args), ptr_type_node))
1295 if (args && args != void_list_node)
1296 args = TREE_CHAIN (args);
1297 error ("%<operator delete%> takes type %qT as first parameter",
1303 args = tree_cons (NULL_TREE, ptr_type_node, args);
1306 type = build_exception_variant
1307 (build_function_type (void_type_node, args),
1308 TYPE_RAISES_EXCEPTIONS (type));
1317 mark_vtable_entries (tree decl)
1319 tree entries = CONSTRUCTOR_ELTS (DECL_INITIAL (decl));
1321 for (; entries; entries = TREE_CHAIN (entries))
1323 tree fnaddr = TREE_VALUE (entries);
1326 STRIP_NOPS (fnaddr);
1328 if (TREE_CODE (fnaddr) != ADDR_EXPR
1329 && TREE_CODE (fnaddr) != FDESC_EXPR)
1330 /* This entry is an offset: a virtual base class offset, a
1331 virtual call offset, an RTTI offset, etc. */
1334 fn = TREE_OPERAND (fnaddr, 0);
1335 TREE_ADDRESSABLE (fn) = 1;
1336 /* When we don't have vcall offsets, we output thunks whenever
1337 we output the vtables that contain them. With vcall offsets,
1338 we know all the thunks we'll need when we emit a virtual
1339 function, so we emit the thunks there instead. */
1340 if (DECL_THUNK_P (fn))
1341 use_thunk (fn, /*emit_p=*/0);
1346 /* Set DECL up to have the closest approximation of "initialized common"
1347 linkage available. */
1350 comdat_linkage (tree decl)
1353 make_decl_one_only (decl);
1354 else if (TREE_CODE (decl) == FUNCTION_DECL
1355 || (TREE_CODE (decl) == VAR_DECL && DECL_ARTIFICIAL (decl)))
1356 /* We can just emit function and compiler-generated variables
1357 statically; having multiple copies is (for the most part) only
1360 There are two correctness issues, however: the address of a
1361 template instantiation with external linkage should be the
1362 same, independent of what translation unit asks for the
1363 address, and this will not hold when we emit multiple copies of
1364 the function. However, there's little else we can do.
1366 Also, by default, the typeinfo implementation assumes that
1367 there will be only one copy of the string used as the name for
1368 each type. Therefore, if weak symbols are unavailable, the
1369 run-time library should perform a more conservative check; it
1370 should perform a string comparison, rather than an address
1372 TREE_PUBLIC (decl) = 0;
1375 /* Static data member template instantiations, however, cannot
1376 have multiple copies. */
1377 if (DECL_INITIAL (decl) == 0
1378 || DECL_INITIAL (decl) == error_mark_node)
1379 DECL_COMMON (decl) = 1;
1380 else if (EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl)))
1382 DECL_COMMON (decl) = 1;
1383 DECL_INITIAL (decl) = error_mark_node;
1385 else if (!DECL_EXPLICIT_INSTANTIATION (decl))
1387 /* We can't do anything useful; leave vars for explicit
1389 DECL_EXTERNAL (decl) = 1;
1390 DECL_NOT_REALLY_EXTERN (decl) = 0;
1394 if (DECL_LANG_SPECIFIC (decl))
1395 DECL_COMDAT (decl) = 1;
1398 /* For win32 we also want to put explicit instantiations in
1399 linkonce sections, so that they will be merged with implicit
1400 instantiations; otherwise we get duplicate symbol errors.
1401 For Darwin we do not want explicit instantiations to be
1405 maybe_make_one_only (tree decl)
1407 /* We used to say that this was not necessary on targets that support weak
1408 symbols, because the implicit instantiations will defer to the explicit
1409 one. However, that's not actually the case in SVR4; a strong definition
1410 after a weak one is an error. Also, not making explicit
1411 instantiations one_only means that we can end up with two copies of
1412 some template instantiations. */
1416 /* We can't set DECL_COMDAT on functions, or cp_finish_file will think
1417 we can get away with not emitting them if they aren't used. We need
1418 to for variables so that cp_finish_decl will update their linkage,
1419 because their DECL_INITIAL may not have been set properly yet. */
1421 if (!TARGET_WEAK_NOT_IN_ARCHIVE_TOC
1422 || (! DECL_EXPLICIT_INSTANTIATION (decl)
1423 && ! DECL_TEMPLATE_SPECIALIZATION (decl)))
1425 make_decl_one_only (decl);
1427 if (TREE_CODE (decl) == VAR_DECL)
1429 DECL_COMDAT (decl) = 1;
1430 /* Mark it needed so we don't forget to emit it. */
1431 mark_decl_referenced (decl);
1436 /* Determine whether or not we want to specifically import or export CTYPE,
1437 using various heuristics. */
1440 import_export_class (tree ctype)
1442 /* -1 for imported, 1 for exported. */
1443 int import_export = 0;
1445 /* It only makes sense to call this function at EOF. The reason is
1446 that this function looks at whether or not the first non-inline
1447 non-abstract virtual member function has been defined in this
1448 translation unit. But, we can't possibly know that until we've
1449 seen the entire translation unit. */
1450 gcc_assert (at_eof);
1452 if (CLASSTYPE_INTERFACE_KNOWN (ctype))
1455 /* If MULTIPLE_SYMBOL_SPACES is set and we saw a #pragma interface,
1456 we will have CLASSTYPE_INTERFACE_ONLY set but not
1457 CLASSTYPE_INTERFACE_KNOWN. In that case, we don't want to use this
1458 heuristic because someone will supply a #pragma implementation
1459 elsewhere, and deducing it here would produce a conflict. */
1460 if (CLASSTYPE_INTERFACE_ONLY (ctype))
1463 if (lookup_attribute ("dllimport", TYPE_ATTRIBUTES (ctype)))
1465 else if (lookup_attribute ("dllexport", TYPE_ATTRIBUTES (ctype)))
1467 else if (CLASSTYPE_IMPLICIT_INSTANTIATION (ctype)
1468 && !flag_implicit_templates)
1469 /* For a template class, without -fimplicit-templates, check the
1470 repository. If the virtual table is assigned to this
1471 translation unit, then export the class; otherwise, import
1473 import_export = repo_export_class_p (ctype) ? 1 : -1;
1474 else if (TYPE_POLYMORPHIC_P (ctype))
1476 /* The ABI specifies that the virtual table and associated
1477 information are emitted with the key method, if any. */
1478 tree method = CLASSTYPE_KEY_METHOD (ctype);
1479 /* If weak symbol support is not available, then we must be
1480 careful not to emit the vtable when the key function is
1481 inline. An inline function can be defined in multiple
1482 translation units. If we were to emit the vtable in each
1483 translation unit containing a definition, we would get
1484 multiple definition errors at link-time. */
1485 if (method && (flag_weak || ! DECL_DECLARED_INLINE_P (method)))
1486 import_export = (DECL_REALLY_EXTERN (method) ? -1 : 1);
1489 /* When MULTIPLE_SYMBOL_SPACES is set, we cannot count on seeing
1490 a definition anywhere else. */
1491 if (MULTIPLE_SYMBOL_SPACES && import_export == -1)
1494 /* Allow backends the chance to overrule the decision. */
1495 if (targetm.cxx.import_export_class)
1496 import_export = targetm.cxx.import_export_class (ctype, import_export);
1500 SET_CLASSTYPE_INTERFACE_KNOWN (ctype);
1501 CLASSTYPE_INTERFACE_ONLY (ctype) = (import_export < 0);
1505 /* Return true if VAR has already been provided to the back end; in that
1506 case VAR should not be modified further by the front end. */
1508 var_finalized_p (tree var)
1510 return cgraph_varpool_node (var)->finalized;
1513 /* DECL is a VAR_DECL or FUNCTION_DECL which, for whatever reason,
1514 must be emitted in this translation unit. Mark it as such. */
1517 mark_needed (tree decl)
1519 /* It's possible that we no longer need to set
1520 TREE_SYMBOL_REFERENCED here directly, but doing so is
1522 TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl)) = 1;
1523 mark_decl_referenced (decl);
1526 /* DECL is either a FUNCTION_DECL or a VAR_DECL. This function
1527 returns true if a definition of this entity should be provided in
1528 this object file. Callers use this function to determine whether
1529 or not to let the back end know that a definition of DECL is
1530 available in this translation unit. */
1533 decl_needed_p (tree decl)
1535 gcc_assert (TREE_CODE (decl) == VAR_DECL
1536 || TREE_CODE (decl) == FUNCTION_DECL);
1537 /* This function should only be called at the end of the translation
1538 unit. We cannot be sure of whether or not something will be
1539 COMDAT until that point. */
1540 gcc_assert (at_eof);
1542 /* All entities with external linkage that are not COMDAT should be
1543 emitted; they may be referred to from other object files. */
1544 if (TREE_PUBLIC (decl) && !DECL_COMDAT (decl))
1546 /* If this entity was used, let the back-end see it; it will decide
1547 whether or not to emit it into the object file. */
1548 if (TREE_USED (decl)
1549 || (DECL_ASSEMBLER_NAME_SET_P (decl)
1550 && TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl))))
1552 /* Otherwise, DECL does not need to be emitted -- yet. A subsequent
1553 reference to DECL might cause it to be emitted later. */
1557 /* If necessary, write out the vtables for the dynamic class CTYPE.
1558 Returns true if any vtables were emitted. */
1561 maybe_emit_vtables (tree ctype)
1567 /* If the vtables for this class have already been emitted there is
1568 nothing more to do. */
1569 primary_vtbl = CLASSTYPE_VTABLES (ctype);
1570 if (var_finalized_p (primary_vtbl))
1572 /* Ignore dummy vtables made by get_vtable_decl. */
1573 if (TREE_TYPE (primary_vtbl) == void_type_node)
1576 /* On some targets, we cannot determine the key method until the end
1577 of the translation unit -- which is when this function is
1579 if (!targetm.cxx.key_method_may_be_inline ())
1580 determine_key_method (ctype);
1582 /* See if any of the vtables are needed. */
1583 for (vtbl = CLASSTYPE_VTABLES (ctype); vtbl; vtbl = TREE_CHAIN (vtbl))
1585 import_export_decl (vtbl);
1586 if (DECL_NOT_REALLY_EXTERN (vtbl) && decl_needed_p (vtbl))
1591 /* If the references to this class' vtables are optimized away,
1592 still emit the appropriate debugging information. See
1594 if (DECL_COMDAT (primary_vtbl)
1595 && CLASSTYPE_DEBUG_REQUESTED (ctype))
1596 note_debug_info_needed (ctype);
1600 /* The ABI requires that we emit all of the vtables if we emit any
1602 for (vtbl = CLASSTYPE_VTABLES (ctype); vtbl; vtbl = TREE_CHAIN (vtbl))
1604 /* Mark entities references from the virtual table as used. */
1605 mark_vtable_entries (vtbl);
1607 if (TREE_TYPE (DECL_INITIAL (vtbl)) == 0)
1609 tree expr = store_init_value (vtbl, DECL_INITIAL (vtbl));
1611 /* It had better be all done at compile-time. */
1616 DECL_EXTERNAL (vtbl) = 0;
1617 rest_of_decl_compilation (vtbl, 1, 1);
1619 /* Because we're only doing syntax-checking, we'll never end up
1620 actually marking the variable as written. */
1621 if (flag_syntax_only)
1622 TREE_ASM_WRITTEN (vtbl) = 1;
1625 /* Since we're writing out the vtable here, also write the debug
1627 note_debug_info_needed (ctype);
1632 /* Like c_determine_visibility, but with additional C++-specific
1636 determine_visibility (tree decl)
1640 /* Cloned constructors and destructors get the same visibility as
1641 the underlying function. That should be set up in
1642 maybe_clone_body. */
1643 gcc_assert (!DECL_CLONED_FUNCTION_P (decl));
1645 /* Give the common code a chance to make a determination. */
1646 if (c_determine_visibility (decl))
1649 /* If DECL is a member of a class, visibility specifiers on the
1650 class can influence the visibility of the DECL. */
1651 if (DECL_CLASS_SCOPE_P (decl))
1652 class_type = DECL_CONTEXT (decl);
1653 else if (TREE_CODE (decl) == VAR_DECL
1654 && DECL_TINFO_P (decl)
1655 && CLASS_TYPE_P (TREE_TYPE (DECL_NAME (decl))))
1656 class_type = TREE_TYPE (DECL_NAME (decl));
1659 /* Virtual tables have DECL_CONTEXT set to their associated class,
1660 so they are automatically handled above. */
1661 gcc_assert (TREE_CODE (decl) != VAR_DECL
1662 || !DECL_VTABLE_OR_VTT_P (decl));
1663 /* Entities not associated with any class just get the
1664 visibility specified by their attributes. */
1668 /* By default, static data members and function members receive
1669 the visibility of their containing class. */
1672 if (TARGET_DLLIMPORT_DECL_ATTRIBUTES
1673 && lookup_attribute ("dllexport", TYPE_ATTRIBUTES (class_type)))
1675 DECL_VISIBILITY (decl) = VISIBILITY_DEFAULT;
1676 DECL_VISIBILITY_SPECIFIED (decl) = 1;
1678 else if (TREE_CODE (decl) == FUNCTION_DECL
1679 && DECL_DECLARED_INLINE_P (decl)
1680 && visibility_options.inlines_hidden)
1682 DECL_VISIBILITY (decl) = VISIBILITY_HIDDEN;
1683 DECL_VISIBILITY_SPECIFIED (decl) = 1;
1685 else if (CLASSTYPE_VISIBILITY_SPECIFIED (class_type))
1687 DECL_VISIBILITY (decl) = CLASSTYPE_VISIBILITY (class_type);
1688 DECL_VISIBILITY_SPECIFIED (decl) = 1;
1690 /* If no explicit visibility information has been provided for
1691 this class, some targets require that class data be
1693 else if (TREE_CODE (decl) == VAR_DECL
1694 && targetm.cxx.export_class_data ()
1695 && (DECL_TINFO_P (decl)
1696 || (DECL_VTABLE_OR_VTT_P (decl)
1697 /* Construction virtual tables are not emitted
1698 because they cannot be referred to from other
1699 object files; their name is not standardized by
1701 && !DECL_CONSTRUCTION_VTABLE_P (decl))))
1702 DECL_VISIBILITY (decl) = VISIBILITY_DEFAULT;
1705 DECL_VISIBILITY (decl) = CLASSTYPE_VISIBILITY (class_type);
1706 DECL_VISIBILITY_SPECIFIED (decl) = 0;
1711 /* DECL is a FUNCTION_DECL or VAR_DECL. If the object file linkage
1712 for DECL has not already been determined, do so now by setting
1713 DECL_EXTERNAL, DECL_COMDAT and other related flags. Until this
1714 function is called entities with vague linkage whose definitions
1715 are available must have TREE_PUBLIC set.
1717 If this function decides to place DECL in COMDAT, it will set
1718 appropriate flags -- but will not clear DECL_EXTERNAL. It is up to
1719 the caller to decide whether or not to clear DECL_EXTERNAL. Some
1720 callers defer that decision until it is clear that DECL is actually
1724 import_export_decl (tree decl)
1730 if (DECL_INTERFACE_KNOWN (decl))
1733 /* We cannot determine what linkage to give to an entity with vague
1734 linkage until the end of the file. For example, a virtual table
1735 for a class will be defined if and only if the key method is
1736 defined in this translation unit. As a further example, consider
1737 that when compiling a translation unit that uses PCH file with
1738 "-frepo" it would be incorrect to make decisions about what
1739 entities to emit when building the PCH; those decisions must be
1740 delayed until the repository information has been processed. */
1741 gcc_assert (at_eof);
1742 /* Object file linkage for explicit instantiations is handled in
1743 mark_decl_instantiated. For static variables in functions with
1744 vague linkage, maybe_commonize_var is used.
1746 Therefore, the only declarations that should be provided to this
1747 function are those with external linkage that are:
1749 * implicit instantiations of function templates
1753 * implicit instantiations of static data members of class
1760 Furthermore, all entities that reach this point must have a
1761 definition available in this translation unit.
1763 The following assertions check these conditions. */
1764 gcc_assert (TREE_CODE (decl) == FUNCTION_DECL
1765 || TREE_CODE (decl) == VAR_DECL);
1766 /* Any code that creates entities with TREE_PUBLIC cleared should
1767 also set DECL_INTERFACE_KNOWN. */
1768 gcc_assert (TREE_PUBLIC (decl));
1769 if (TREE_CODE (decl) == FUNCTION_DECL)
1770 gcc_assert (DECL_IMPLICIT_INSTANTIATION (decl)
1771 || DECL_FRIEND_PSEUDO_TEMPLATE_INSTANTIATION (decl)
1772 || DECL_DECLARED_INLINE_P (decl));
1774 gcc_assert (DECL_IMPLICIT_INSTANTIATION (decl)
1775 || DECL_VTABLE_OR_VTT_P (decl)
1776 || DECL_TINFO_P (decl));
1777 /* Check that a definition of DECL is available in this translation
1779 gcc_assert (!DECL_REALLY_EXTERN (decl));
1781 /* Assume that DECL will not have COMDAT linkage. */
1783 /* Assume that DECL will not be imported into this translation
1787 /* See if the repository tells us whether or not to emit DECL in
1788 this translation unit. */
1789 emit_p = repo_emit_p (decl);
1792 else if (emit_p == 1)
1794 /* The repository indicates that this entity should be defined
1795 here. Make sure the back end honors that request. */
1796 if (TREE_CODE (decl) == VAR_DECL)
1798 else if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl)
1799 || DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P (decl))
1802 FOR_EACH_CLONE (clone, decl)
1803 mark_needed (clone);
1807 /* Output the definition as an ordinary strong definition. */
1808 DECL_EXTERNAL (decl) = 0;
1809 DECL_INTERFACE_KNOWN (decl) = 1;
1814 /* We have already decided what to do with this DECL; there is no
1815 need to check anything further. */
1817 else if (TREE_CODE (decl) == VAR_DECL && DECL_VTABLE_OR_VTT_P (decl))
1819 tree type = DECL_CONTEXT (decl);
1820 import_export_class (type);
1821 if (TYPE_FOR_JAVA (type))
1823 else if (CLASSTYPE_INTERFACE_KNOWN (type)
1824 && CLASSTYPE_INTERFACE_ONLY (type))
1826 else if (TARGET_WEAK_NOT_IN_ARCHIVE_TOC
1827 && !CLASSTYPE_USE_TEMPLATE (type)
1828 && CLASSTYPE_KEY_METHOD (type)
1829 && !DECL_DECLARED_INLINE_P (CLASSTYPE_KEY_METHOD (type)))
1830 /* The ABI requires that all virtual tables be emitted with
1831 COMDAT linkage. However, on systems where COMDAT symbols
1832 don't show up in the table of contents for a static
1833 archive, the linker will report errors about undefined
1834 symbols because it will not see the virtual table
1835 definition. Therefore, in the case that we know that the
1836 virtual table will be emitted in only one translation
1837 unit, we make the virtual table an ordinary definition
1838 with external linkage. */
1839 DECL_EXTERNAL (decl) = 0;
1840 else if (CLASSTYPE_INTERFACE_KNOWN (type))
1842 /* TYPE is being exported from this translation unit, so DECL
1843 should be defined here. The ABI requires COMDAT
1844 linkage. Normally, we only emit COMDAT things when they
1845 are needed; make sure that we realize that this entity is
1850 else if (!flag_implicit_templates
1851 && CLASSTYPE_IMPLICIT_INSTANTIATION (type))
1856 else if (TREE_CODE (decl) == VAR_DECL && DECL_TINFO_P (decl))
1858 tree type = TREE_TYPE (DECL_NAME (decl));
1859 if (CLASS_TYPE_P (type))
1861 import_export_class (type);
1862 if (CLASSTYPE_INTERFACE_KNOWN (type)
1863 && TYPE_POLYMORPHIC_P (type)
1864 && CLASSTYPE_INTERFACE_ONLY (type)
1865 /* If -fno-rtti was specified, then we cannot be sure
1866 that RTTI information will be emitted with the
1867 virtual table of the class, so we must emit it
1868 wherever it is used. */
1874 if (CLASSTYPE_INTERFACE_KNOWN (type)
1875 && !CLASSTYPE_INTERFACE_ONLY (type))
1882 else if (DECL_TEMPLATE_INSTANTIATION (decl)
1883 || DECL_FRIEND_PSEUDO_TEMPLATE_INSTANTIATION (decl))
1885 /* DECL is an implicit instantiation of a function or static
1887 if (flag_implicit_templates
1888 || (flag_implicit_inline_templates
1889 && TREE_CODE (decl) == FUNCTION_DECL
1890 && DECL_DECLARED_INLINE_P (decl)))
1893 /* If we are not implicitly generating templates, then mark
1894 this entity as undefined in this translation unit. */
1897 else if (DECL_FUNCTION_MEMBER_P (decl))
1899 if (!DECL_DECLARED_INLINE_P (decl))
1901 tree ctype = DECL_CONTEXT (decl);
1902 import_export_class (ctype);
1903 if (CLASSTYPE_INTERFACE_KNOWN (ctype))
1905 DECL_NOT_REALLY_EXTERN (decl)
1906 = ! (CLASSTYPE_INTERFACE_ONLY (ctype)
1907 || (DECL_DECLARED_INLINE_P (decl)
1908 && ! flag_implement_inlines
1909 && !DECL_VINDEX (decl)));
1911 if (!DECL_NOT_REALLY_EXTERN (decl))
1912 DECL_EXTERNAL (decl) = 1;
1914 /* Always make artificials weak. */
1915 if (DECL_ARTIFICIAL (decl) && flag_weak)
1918 maybe_make_one_only (decl);
1929 /* If we are importing DECL into this translation unit, mark is
1930 an undefined here. */
1931 DECL_EXTERNAL (decl) = 1;
1932 DECL_NOT_REALLY_EXTERN (decl) = 0;
1936 /* If we decided to put DECL in COMDAT, mark it accordingly at
1938 comdat_linkage (decl);
1941 DECL_INTERFACE_KNOWN (decl) = 1;
1944 /* Return an expression that performs the destruction of DECL, which
1945 must be a VAR_DECL whose type has a non-trivial destructor, or is
1946 an array whose (innermost) elements have a non-trivial destructor. */
1949 build_cleanup (tree decl)
1952 tree type = TREE_TYPE (decl);
1954 /* This function should only be called for declarations that really
1955 require cleanups. */
1956 gcc_assert (!TYPE_HAS_TRIVIAL_DESTRUCTOR (type));
1958 /* Treat all objects with destructors as used; the destructor may do
1959 something substantive. */
1962 if (TREE_CODE (type) == ARRAY_TYPE)
1966 cxx_mark_addressable (decl);
1967 temp = build1 (ADDR_EXPR, build_pointer_type (type), decl);
1969 temp = build_delete (TREE_TYPE (temp), temp,
1970 sfk_complete_destructor,
1971 LOOKUP_NORMAL|LOOKUP_NONVIRTUAL|LOOKUP_DESTRUCTOR, 0);
1975 /* Returns the initialization guard variable for the variable DECL,
1976 which has static storage duration. */
1979 get_guard (tree decl)
1984 sname = mangle_guard_variable (decl);
1985 guard = IDENTIFIER_GLOBAL_VALUE (sname);
1990 /* We use a type that is big enough to contain a mutex as well
1991 as an integer counter. */
1992 guard_type = targetm.cxx.guard_type ();
1993 guard = build_decl (VAR_DECL, sname, guard_type);
1995 /* The guard should have the same linkage as what it guards. */
1996 TREE_PUBLIC (guard) = TREE_PUBLIC (decl);
1997 TREE_STATIC (guard) = TREE_STATIC (decl);
1998 DECL_COMMON (guard) = DECL_COMMON (decl);
1999 DECL_ONE_ONLY (guard) = DECL_ONE_ONLY (decl);
2000 if (TREE_PUBLIC (decl))
2001 DECL_WEAK (guard) = DECL_WEAK (decl);
2003 DECL_ARTIFICIAL (guard) = 1;
2004 TREE_USED (guard) = 1;
2005 pushdecl_top_level_and_finish (guard, NULL_TREE);
2010 /* Return those bits of the GUARD variable that should be set when the
2011 guarded entity is actually initialized. */
2014 get_guard_bits (tree guard)
2016 if (!targetm.cxx.guard_mask_bit ())
2018 /* We only set the first byte of the guard, in order to leave room
2019 for a mutex in the high-order bits. */
2020 guard = build1 (ADDR_EXPR,
2021 build_pointer_type (TREE_TYPE (guard)),
2023 guard = build1 (NOP_EXPR,
2024 build_pointer_type (char_type_node),
2026 guard = build1 (INDIRECT_REF, char_type_node, guard);
2032 /* Return an expression which determines whether or not the GUARD
2033 variable has already been initialized. */
2036 get_guard_cond (tree guard)
2040 /* Check to see if the GUARD is zero. */
2041 guard = get_guard_bits (guard);
2043 /* Mask off all but the low bit. */
2044 if (targetm.cxx.guard_mask_bit ())
2046 guard_value = integer_one_node;
2047 if (!same_type_p (TREE_TYPE (guard_value), TREE_TYPE (guard)))
2048 guard_value = convert (TREE_TYPE (guard), guard_value);
2049 guard = cp_build_binary_op (BIT_AND_EXPR, guard, guard_value);
2052 guard_value = integer_zero_node;
2053 if (!same_type_p (TREE_TYPE (guard_value), TREE_TYPE (guard)))
2054 guard_value = convert (TREE_TYPE (guard), guard_value);
2055 return cp_build_binary_op (EQ_EXPR, guard, guard_value);
2058 /* Return an expression which sets the GUARD variable, indicating that
2059 the variable being guarded has been initialized. */
2062 set_guard (tree guard)
2066 /* Set the GUARD to one. */
2067 guard = get_guard_bits (guard);
2068 guard_init = integer_one_node;
2069 if (!same_type_p (TREE_TYPE (guard_init), TREE_TYPE (guard)))
2070 guard_init = convert (TREE_TYPE (guard), guard_init);
2071 return build_modify_expr (guard, NOP_EXPR, guard_init);
2074 /* Start the process of running a particular set of global constructors
2075 or destructors. Subroutine of do_[cd]tors. */
2078 start_objects (int method_type, int initp)
2084 /* Make ctor or dtor function. METHOD_TYPE may be 'I' or 'D'. */
2086 if (initp != DEFAULT_INIT_PRIORITY)
2096 sprintf (type, "%c%c%.5u", method_type, joiner, initp);
2099 sprintf (type, "%c", method_type);
2101 fndecl = build_lang_decl (FUNCTION_DECL,
2102 get_file_function_name_long (type),
2103 build_function_type (void_type_node,
2105 start_preparsed_function (fndecl, /*attrs=*/NULL_TREE, SF_PRE_PARSED);
2107 /* It can be a static function as long as collect2 does not have
2108 to scan the object file to find its ctor/dtor routine. */
2109 TREE_PUBLIC (current_function_decl) = ! targetm.have_ctors_dtors;
2111 /* Mark this declaration as used to avoid spurious warnings. */
2112 TREE_USED (current_function_decl) = 1;
2114 /* Mark this function as a global constructor or destructor. */
2115 if (method_type == 'I')
2116 DECL_GLOBAL_CTOR_P (current_function_decl) = 1;
2118 DECL_GLOBAL_DTOR_P (current_function_decl) = 1;
2119 DECL_LANG_SPECIFIC (current_function_decl)->decl_flags.u2sel = 1;
2121 body = begin_compound_stmt (BCS_FN_BODY);
2123 /* We cannot allow these functions to be elided, even if they do not
2124 have external linkage. And, there's no point in deferring
2125 compilation of thes functions; they're all going to have to be
2127 DECL_INLINE (current_function_decl) = 0;
2128 DECL_UNINLINABLE (current_function_decl) = 1;
2133 /* Finish the process of running a particular set of global constructors
2134 or destructors. Subroutine of do_[cd]tors. */
2137 finish_objects (int method_type, int initp, tree body)
2142 finish_compound_stmt (body);
2143 fn = finish_function (0);
2144 expand_or_defer_fn (fn);
2146 /* When only doing semantic analysis, and no RTL generation, we
2147 can't call functions that directly emit assembly code; there is
2148 no assembly file in which to put the code. */
2149 if (flag_syntax_only)
2152 if (targetm.have_ctors_dtors)
2154 rtx fnsym = XEXP (DECL_RTL (fn), 0);
2155 if (method_type == 'I')
2156 (* targetm.asm_out.constructor) (fnsym, initp);
2158 (* targetm.asm_out.destructor) (fnsym, initp);
2162 /* The names of the parameters to the function created to handle
2163 initializations and destructions for objects with static storage
2165 #define INITIALIZE_P_IDENTIFIER "__initialize_p"
2166 #define PRIORITY_IDENTIFIER "__priority"
2168 /* The name of the function we create to handle initializations and
2169 destructions for objects with static storage duration. */
2170 #define SSDF_IDENTIFIER "__static_initialization_and_destruction"
2172 /* The declaration for the __INITIALIZE_P argument. */
2173 static GTY(()) tree initialize_p_decl;
2175 /* The declaration for the __PRIORITY argument. */
2176 static GTY(()) tree priority_decl;
2178 /* The declaration for the static storage duration function. */
2179 static GTY(()) tree ssdf_decl;
2181 /* All the static storage duration functions created in this
2182 translation unit. */
2183 static GTY(()) varray_type ssdf_decls;
2185 /* A map from priority levels to information about that priority
2186 level. There may be many such levels, so efficient lookup is
2188 static splay_tree priority_info_map;
2190 /* Begins the generation of the function that will handle all
2191 initialization and destruction of objects with static storage
2192 duration. The function generated takes two parameters of type
2193 `int': __INITIALIZE_P and __PRIORITY. If __INITIALIZE_P is
2194 nonzero, it performs initializations. Otherwise, it performs
2195 destructions. It only performs those initializations or
2196 destructions with the indicated __PRIORITY. The generated function
2199 It is assumed that this function will only be called once per
2200 translation unit. */
2203 start_static_storage_duration_function (unsigned count)
2208 char id[sizeof (SSDF_IDENTIFIER) + 1 /* '\0' */ + 32];
2210 /* Create the identifier for this function. It will be of the form
2211 SSDF_IDENTIFIER_<number>. */
2212 sprintf (id, "%s_%u", SSDF_IDENTIFIER, count);
2214 /* Create the parameters. */
2215 parm_types = void_list_node;
2216 parm_types = tree_cons (NULL_TREE, integer_type_node, parm_types);
2217 parm_types = tree_cons (NULL_TREE, integer_type_node, parm_types);
2218 type = build_function_type (void_type_node, parm_types);
2220 /* Create the FUNCTION_DECL itself. */
2221 ssdf_decl = build_lang_decl (FUNCTION_DECL,
2222 get_identifier (id),
2224 TREE_PUBLIC (ssdf_decl) = 0;
2225 DECL_ARTIFICIAL (ssdf_decl) = 1;
2227 /* Put this function in the list of functions to be called from the
2228 static constructors and destructors. */
2231 VARRAY_TREE_INIT (ssdf_decls, 32, "ssdf_decls");
2233 /* Take this opportunity to initialize the map from priority
2234 numbers to information about that priority level. */
2235 priority_info_map = splay_tree_new (splay_tree_compare_ints,
2236 /*delete_key_fn=*/0,
2237 /*delete_value_fn=*/
2238 (splay_tree_delete_value_fn) &free);
2240 /* We always need to generate functions for the
2241 DEFAULT_INIT_PRIORITY so enter it now. That way when we walk
2242 priorities later, we'll be sure to find the
2243 DEFAULT_INIT_PRIORITY. */
2244 get_priority_info (DEFAULT_INIT_PRIORITY);
2247 VARRAY_PUSH_TREE (ssdf_decls, ssdf_decl);
2249 /* Create the argument list. */
2250 initialize_p_decl = cp_build_parm_decl
2251 (get_identifier (INITIALIZE_P_IDENTIFIER), integer_type_node);
2252 DECL_CONTEXT (initialize_p_decl) = ssdf_decl;
2253 TREE_USED (initialize_p_decl) = 1;
2254 priority_decl = cp_build_parm_decl
2255 (get_identifier (PRIORITY_IDENTIFIER), integer_type_node);
2256 DECL_CONTEXT (priority_decl) = ssdf_decl;
2257 TREE_USED (priority_decl) = 1;
2259 TREE_CHAIN (initialize_p_decl) = priority_decl;
2260 DECL_ARGUMENTS (ssdf_decl) = initialize_p_decl;
2262 /* Put the function in the global scope. */
2263 pushdecl (ssdf_decl);
2265 /* Start the function itself. This is equivalent to declaring the
2268 static void __ssdf (int __initialize_p, init __priority_p);
2270 It is static because we only need to call this function from the
2271 various constructor and destructor functions for this module. */
2272 start_preparsed_function (ssdf_decl,
2273 /*attrs=*/NULL_TREE,
2276 /* Set up the scope of the outermost block in the function. */
2277 body = begin_compound_stmt (BCS_FN_BODY);
2279 /* This function must not be deferred because we are depending on
2280 its compilation to tell us what is TREE_SYMBOL_REFERENCED. */
2281 DECL_INLINE (ssdf_decl) = 0;
2282 DECL_UNINLINABLE (ssdf_decl) = 1;
2287 /* Finish the generation of the function which performs initialization
2288 and destruction of objects with static storage duration. After
2289 this point, no more such objects can be created. */
2292 finish_static_storage_duration_function (tree body)
2294 /* Close out the function. */
2295 finish_compound_stmt (body);
2296 expand_or_defer_fn (finish_function (0));
2299 /* Return the information about the indicated PRIORITY level. If no
2300 code to handle this level has yet been generated, generate the
2301 appropriate prologue. */
2303 static priority_info
2304 get_priority_info (int priority)
2309 n = splay_tree_lookup (priority_info_map,
2310 (splay_tree_key) priority);
2313 /* Create a new priority information structure, and insert it
2315 pi = xmalloc (sizeof (struct priority_info_s));
2316 pi->initializations_p = 0;
2317 pi->destructions_p = 0;
2318 splay_tree_insert (priority_info_map,
2319 (splay_tree_key) priority,
2320 (splay_tree_value) pi);
2323 pi = (priority_info) n->value;
2328 /* Set up to handle the initialization or destruction of DECL. If
2329 INITP is nonzero, we are initializing the variable. Otherwise, we
2330 are destroying it. */
2333 start_static_initialization_or_destruction (tree decl, int initp)
2335 tree guard_if_stmt = NULL_TREE;
2342 /* Figure out the priority for this declaration. */
2343 priority = DECL_INIT_PRIORITY (decl);
2345 priority = DEFAULT_INIT_PRIORITY;
2347 /* Remember that we had an initialization or finalization at this
2349 pi = get_priority_info (priority);
2351 pi->initializations_p = 1;
2353 pi->destructions_p = 1;
2355 /* Trick the compiler into thinking we are at the file and line
2356 where DECL was declared so that error-messages make sense, and so
2357 that the debugger will show somewhat sensible file and line
2359 input_location = DECL_SOURCE_LOCATION (decl);
2365 Access control for implicit calls to the constructors,
2366 the conversion functions, or the destructor called to
2367 create and destroy a static data member is performed as
2368 if these calls appeared in the scope of the member's
2371 we pretend we are in a static member function of the class of
2372 which the DECL is a member. */
2373 if (member_p (decl))
2375 DECL_CONTEXT (current_function_decl) = DECL_CONTEXT (decl);
2376 DECL_STATIC_FUNCTION_P (current_function_decl) = 1;
2379 /* Conditionalize this initialization on being in the right priority
2380 and being initializing/finalizing appropriately. */
2381 guard_if_stmt = begin_if_stmt ();
2382 cond = cp_build_binary_op (EQ_EXPR,
2384 build_int_cst (NULL_TREE, priority));
2385 init_cond = initp ? integer_one_node : integer_zero_node;
2386 init_cond = cp_build_binary_op (EQ_EXPR,
2389 cond = cp_build_binary_op (TRUTH_ANDIF_EXPR, cond, init_cond);
2391 /* Assume we don't need a guard. */
2393 /* We need a guard if this is an object with external linkage that
2394 might be initialized in more than one place. (For example, a
2395 static data member of a template, when the data member requires
2397 if (TREE_PUBLIC (decl) && (DECL_COMMON (decl)
2398 || DECL_ONE_ONLY (decl)
2399 || DECL_WEAK (decl)))
2403 guard = get_guard (decl);
2405 /* When using __cxa_atexit, we just check the GUARD as we would
2406 for a local static. */
2407 if (flag_use_cxa_atexit)
2409 /* When using __cxa_atexit, we never try to destroy
2410 anything from a static destructor. */
2412 guard_cond = get_guard_cond (guard);
2414 /* If we don't have __cxa_atexit, then we will be running
2415 destructors from .fini sections, or their equivalents. So,
2416 we need to know how many times we've tried to initialize this
2417 object. We do initializations only if the GUARD is zero,
2418 i.e., if we are the first to initialize the variable. We do
2419 destructions only if the GUARD is one, i.e., if we are the
2420 last to destroy the variable. */
2423 = cp_build_binary_op (EQ_EXPR,
2424 build_unary_op (PREINCREMENT_EXPR,
2430 = cp_build_binary_op (EQ_EXPR,
2431 build_unary_op (PREDECREMENT_EXPR,
2436 cond = cp_build_binary_op (TRUTH_ANDIF_EXPR, cond, guard_cond);
2439 finish_if_stmt_cond (cond, guard_if_stmt);
2441 /* If we're using __cxa_atexit, we have not already set the GUARD,
2442 so we must do so now. */
2443 if (guard && initp && flag_use_cxa_atexit)
2444 finish_expr_stmt (set_guard (guard));
2446 return guard_if_stmt;
2449 /* We've just finished generating code to do an initialization or
2450 finalization. GUARD_IF_STMT is the if-statement we used to guard
2451 the initialization. */
2454 finish_static_initialization_or_destruction (tree guard_if_stmt)
2456 finish_then_clause (guard_if_stmt);
2457 finish_if_stmt (guard_if_stmt);
2459 /* Now that we're done with DECL we don't need to pretend to be a
2460 member of its class any longer. */
2461 DECL_CONTEXT (current_function_decl) = NULL_TREE;
2462 DECL_STATIC_FUNCTION_P (current_function_decl) = 0;
2465 /* Generate code to do the initialization of DECL, a VAR_DECL with
2466 static storage duration. The initialization is INIT. */
2469 do_static_initialization (tree decl, tree init)
2473 /* Set up for the initialization. */
2475 = start_static_initialization_or_destruction (decl,
2478 /* Perform the initialization. */
2480 finish_expr_stmt (init);
2482 /* If we're using __cxa_atexit, register a a function that calls the
2483 destructor for the object. */
2484 if (flag_use_cxa_atexit)
2485 finish_expr_stmt (register_dtor_fn (decl));
2488 finish_static_initialization_or_destruction (guard_if_stmt);
2491 /* Generate code to do the static destruction of DECL. If DECL may be
2492 initialized more than once in different object files, GUARD is the
2493 guard variable to check. PRIORITY is the priority for the
2497 do_static_destruction (tree decl)
2501 /* If we're using __cxa_atexit, then destructors are registered
2502 immediately after objects are initialized. */
2503 gcc_assert (!flag_use_cxa_atexit);
2505 /* If we don't need a destructor, there's nothing to do. */
2506 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
2509 /* Actually do the destruction. */
2510 guard_if_stmt = start_static_initialization_or_destruction (decl,
2512 finish_expr_stmt (build_cleanup (decl));
2513 finish_static_initialization_or_destruction (guard_if_stmt);
2516 /* VARS is a list of variables with static storage duration which may
2517 need initialization and/or finalization. Remove those variables
2518 that don't really need to be initialized or finalized, and return
2519 the resulting list. The order in which the variables appear in
2520 VARS is in reverse order of the order in which they should actually
2521 be initialized. The list we return is in the unreversed order;
2522 i.e., the first variable should be initialized first. */
2525 prune_vars_needing_no_initialization (tree *vars)
2528 tree result = NULL_TREE;
2533 tree decl = TREE_VALUE (t);
2534 tree init = TREE_PURPOSE (t);
2536 /* Deal gracefully with error. */
2537 if (decl == error_mark_node)
2539 var = &TREE_CHAIN (t);
2543 /* The only things that can be initialized are variables. */
2544 gcc_assert (TREE_CODE (decl) == VAR_DECL);
2546 /* If this object is not defined, we don't need to do anything
2548 if (DECL_EXTERNAL (decl))
2550 var = &TREE_CHAIN (t);
2554 /* Also, if the initializer already contains errors, we can bail
2556 if (init && TREE_CODE (init) == TREE_LIST
2557 && value_member (error_mark_node, init))
2559 var = &TREE_CHAIN (t);
2563 /* This variable is going to need initialization and/or
2564 finalization, so we add it to the list. */
2565 *var = TREE_CHAIN (t);
2566 TREE_CHAIN (t) = result;
2573 /* Make sure we have told the back end about all the variables in
2577 write_out_vars (tree vars)
2581 for (v = vars; v; v = TREE_CHAIN (v))
2583 tree var = TREE_VALUE (v);
2584 if (!var_finalized_p (var))
2586 import_export_decl (var);
2587 rest_of_decl_compilation (var, 1, 1);
2592 /* Generate a static constructor (if CONSTRUCTOR_P) or destructor
2593 (otherwise) that will initialize all gobal objects with static
2594 storage duration having the indicated PRIORITY. */
2597 generate_ctor_or_dtor_function (bool constructor_p, int priority,
2606 input_location = *locus;
2607 #ifdef USE_MAPPED_LOCATION
2613 /* We use `I' to indicate initialization and `D' to indicate
2615 function_key = constructor_p ? 'I' : 'D';
2617 /* We emit the function lazily, to avoid generating empty
2618 global constructors and destructors. */
2621 /* Call the static storage duration function with appropriate
2624 for (i = 0; i < ssdf_decls->elements_used; ++i)
2626 fndecl = VARRAY_TREE (ssdf_decls, i);
2628 /* Calls to pure or const functions will expand to nothing. */
2629 if (! (flags_from_decl_or_type (fndecl) & (ECF_CONST | ECF_PURE)))
2632 body = start_objects (function_key, priority);
2634 arguments = tree_cons (NULL_TREE,
2635 build_int_cst (NULL_TREE, priority),
2637 arguments = tree_cons (NULL_TREE,
2638 build_int_cst (NULL_TREE, constructor_p),
2640 finish_expr_stmt (build_function_call (fndecl, arguments));
2644 /* If we're generating code for the DEFAULT_INIT_PRIORITY, throw in
2645 calls to any functions marked with attributes indicating that
2646 they should be called at initialization- or destruction-time. */
2647 if (priority == DEFAULT_INIT_PRIORITY)
2651 for (fns = constructor_p ? static_ctors : static_dtors;
2653 fns = TREE_CHAIN (fns))
2655 fndecl = TREE_VALUE (fns);
2657 /* Calls to pure/const functions will expand to nothing. */
2658 if (! (flags_from_decl_or_type (fndecl) & (ECF_CONST | ECF_PURE)))
2661 body = start_objects (function_key, priority);
2662 finish_expr_stmt (build_function_call (fndecl, NULL_TREE));
2667 /* Close out the function. */
2669 finish_objects (function_key, priority, body);
2672 /* Generate constructor and destructor functions for the priority
2676 generate_ctor_and_dtor_functions_for_priority (splay_tree_node n, void * data)
2678 location_t *locus = data;
2679 int priority = (int) n->key;
2680 priority_info pi = (priority_info) n->value;
2682 /* Generate the functions themselves, but only if they are really
2684 if (pi->initializations_p
2685 || (priority == DEFAULT_INIT_PRIORITY && static_ctors))
2686 generate_ctor_or_dtor_function (/*constructor_p=*/true, priority, locus);
2687 if (pi->destructions_p
2688 || (priority == DEFAULT_INIT_PRIORITY && static_dtors))
2689 generate_ctor_or_dtor_function (/*constructor_p=*/false, priority, locus);
2691 /* Keep iterating. */
2695 /* Called via LANGHOOK_CALLGRAPH_ANALYZE_EXPR. It is supposed to mark
2696 decls referenced from frontend specific constructs; it will be called
2697 only for language-specific tree nodes.
2699 Here we must deal with member pointers. */
2702 cxx_callgraph_analyze_expr (tree *tp, int *walk_subtrees ATTRIBUTE_UNUSED,
2703 tree from ATTRIBUTE_UNUSED)
2707 switch (TREE_CODE (t))
2710 if (TYPE_PTRMEMFUNC_P (TREE_TYPE (t)))
2711 cgraph_mark_needed_node (cgraph_node (PTRMEM_CST_MEMBER (t)));
2714 if (TREE_CODE (BASELINK_FUNCTIONS (t)) == FUNCTION_DECL)
2715 cgraph_mark_needed_node (cgraph_node (BASELINK_FUNCTIONS (t)));
2718 if (DECL_VTABLE_OR_VTT_P (t))
2720 /* The ABI requires that all virtual tables be emitted
2721 whenever one of them is. */
2723 for (vtbl = CLASSTYPE_VTABLES (DECL_CONTEXT (t));
2725 vtbl = TREE_CHAIN (vtbl))
2726 mark_decl_referenced (vtbl);
2728 else if (DECL_CONTEXT (t)
2729 && TREE_CODE (DECL_CONTEXT (t)) == FUNCTION_DECL)
2730 /* If we need a static variable in a function, then we
2731 need the containing function. */
2732 mark_decl_referenced (DECL_CONTEXT (t));
2741 /* This routine is called from the last rule in yyparse ().
2742 Its job is to create all the code needed to initialize and
2743 destroy the global aggregates. We do the destruction
2744 first, since that way we only need to reverse the decls once. */
2747 cp_finish_file (void)
2753 unsigned ssdf_count = 0;
2756 locus = input_location;
2759 /* Bad parse errors. Just forget about it. */
2760 if (! global_bindings_p () || current_class_type || decl_namespace_list)
2764 c_common_write_pch ();
2766 #ifdef USE_MAPPED_LOCATION
2769 /* Otherwise, GDB can get confused, because in only knows
2770 about source for LINENO-1 lines. */
2774 /* We now have to write out all the stuff we put off writing out.
2777 o Template specializations that we have not yet instantiated,
2778 but which are needed.
2779 o Initialization and destruction for non-local objects with
2780 static storage duration. (Local objects with static storage
2781 duration are initialized when their scope is first entered,
2782 and are cleaned up via atexit.)
2783 o Virtual function tables.
2785 All of these may cause others to be needed. For example,
2786 instantiating one function may cause another to be needed, and
2787 generating the initializer for an object may cause templates to be
2788 instantiated, etc., etc. */
2790 timevar_push (TV_VARCONST);
2792 emit_support_tinfos ();
2800 /* If there are templates that we've put off instantiating, do
2802 instantiate_pending_templates (retries);
2805 /* Write out virtual tables as required. Note that writing out
2806 the virtual table for a template class may cause the
2807 instantiation of members of that class. If we write out
2808 vtables then we remove the class from our list so we don't
2809 have to look at it again. */
2811 while (keyed_classes != NULL_TREE
2812 && maybe_emit_vtables (TREE_VALUE (keyed_classes)))
2815 keyed_classes = TREE_CHAIN (keyed_classes);
2821 tree next = TREE_CHAIN (t);
2825 if (maybe_emit_vtables (TREE_VALUE (next)))
2828 TREE_CHAIN (t) = TREE_CHAIN (next);
2833 next = TREE_CHAIN (t);
2837 /* Write out needed type info variables. We have to be careful
2838 looping through unemitted decls, because emit_tinfo_decl may
2839 cause other variables to be needed. New elements will be
2840 appended, and we remove from the vector those that actually
2842 for (i = VEC_length (tree, unemitted_tinfo_decls);
2843 VEC_iterate (tree, unemitted_tinfo_decls, --i, t);)
2844 if (emit_tinfo_decl (t))
2847 VEC_unordered_remove (tree, unemitted_tinfo_decls, i);
2850 /* The list of objects with static storage duration is built up
2851 in reverse order. We clear STATIC_AGGREGATES so that any new
2852 aggregates added during the initialization of these will be
2853 initialized in the correct order when we next come around the
2855 vars = prune_vars_needing_no_initialization (&static_aggregates);
2861 /* We need to start a new initialization function each time
2862 through the loop. That's because we need to know which
2863 vtables have been referenced, and TREE_SYMBOL_REFERENCED
2864 isn't computed until a function is finished, and written
2865 out. That's a deficiency in the back-end. When this is
2866 fixed, these initialization functions could all become
2867 inline, with resulting performance improvements. */
2870 /* Set the line and file, so that it is obviously not from
2872 input_location = locus;
2873 ssdf_body = start_static_storage_duration_function (ssdf_count);
2875 /* Make sure the back end knows about all the variables. */
2876 write_out_vars (vars);
2878 /* First generate code to do all the initializations. */
2879 for (v = vars; v; v = TREE_CHAIN (v))
2880 do_static_initialization (TREE_VALUE (v),
2883 /* Then, generate code to do all the destructions. Do these
2884 in reverse order so that the most recently constructed
2885 variable is the first destroyed. If we're using
2886 __cxa_atexit, then we don't need to do this; functions
2887 were registered at initialization time to destroy the
2889 if (!flag_use_cxa_atexit)
2891 vars = nreverse (vars);
2892 for (v = vars; v; v = TREE_CHAIN (v))
2893 do_static_destruction (TREE_VALUE (v));
2898 /* Finish up the static storage duration function for this
2900 input_location = locus;
2901 finish_static_storage_duration_function (ssdf_body);
2903 /* All those initializations and finalizations might cause
2904 us to need more inline functions, more template
2905 instantiations, etc. */
2908 #ifdef USE_MAPPED_LOCATION
2915 /* Go through the set of inline functions whose bodies have not
2916 been emitted yet. If out-of-line copies of these functions
2917 are required, emit them. */
2918 for (i = 0; i < deferred_fns_used; ++i)
2920 tree decl = VARRAY_TREE (deferred_fns, i);
2922 /* Does it need synthesizing? */
2923 if (DECL_ARTIFICIAL (decl) && ! DECL_INITIAL (decl)
2924 && (! DECL_REALLY_EXTERN (decl) || DECL_INLINE (decl)))
2926 /* Even though we're already at the top-level, we push
2927 there again. That way, when we pop back a few lines
2928 hence, all of our state is restored. Otherwise,
2929 finish_function doesn't clean things up, and we end
2930 up with CURRENT_FUNCTION_DECL set. */
2931 push_to_top_level ();
2932 synthesize_method (decl);
2933 pop_from_top_level ();
2937 if (!DECL_SAVED_TREE (decl))
2940 import_export_decl (decl);
2942 /* We lie to the back-end, pretending that some functions
2943 are not defined when they really are. This keeps these
2944 functions from being put out unnecessarily. But, we must
2945 stop lying when the functions are referenced, or if they
2946 are not comdat since they need to be put out now. This
2947 is done in a separate for cycle, because if some deferred
2948 function is contained in another deferred function later
2949 in deferred_fns varray, rest_of_compilation would skip
2950 this function and we really cannot expand the same
2952 if (DECL_NOT_REALLY_EXTERN (decl)
2953 && DECL_INITIAL (decl)
2954 && decl_needed_p (decl))
2955 DECL_EXTERNAL (decl) = 0;
2957 /* If we're going to need to write this function out, and
2958 there's already a body for it, create RTL for it now.
2959 (There might be no body if this is a method we haven't
2960 gotten around to synthesizing yet.) */
2961 if (!DECL_EXTERNAL (decl)
2962 && decl_needed_p (decl)
2963 && !TREE_ASM_WRITTEN (decl)
2964 && !cgraph_node (decl)->local.finalized)
2966 /* We will output the function; no longer consider it in this
2968 DECL_DEFER_OUTPUT (decl) = 0;
2969 /* Generate RTL for this function now that we know we
2971 expand_or_defer_fn (decl);
2972 /* If we're compiling -fsyntax-only pretend that this
2973 function has been written out so that we don't try to
2975 if (flag_syntax_only)
2976 TREE_ASM_WRITTEN (decl) = 1;
2981 if (walk_namespaces (wrapup_globals_for_namespace, /*data=*/0))
2984 /* Static data members are just like namespace-scope globals. */
2985 for (i = 0; i < pending_statics_used; ++i)
2987 tree decl = VARRAY_TREE (pending_statics, i);
2988 if (var_finalized_p (decl) || DECL_REALLY_EXTERN (decl))
2990 import_export_decl (decl);
2991 /* If this static data member is needed, provide it to the
2993 if (DECL_NOT_REALLY_EXTERN (decl) && decl_needed_p (decl))
2994 DECL_EXTERNAL (decl) = 0;
2997 && wrapup_global_declarations (&VARRAY_TREE (pending_statics, 0),
2998 pending_statics_used))
3001 /* Ask the back end to emit functions and variables that are
3002 enqueued. These emissions may result in marking more entities
3004 if (cgraph_assemble_pending_functions ())
3006 if (cgraph_varpool_assemble_pending_decls ())
3013 /* All used inline functions must have a definition at this point. */
3014 for (i = 0; i < deferred_fns_used; ++i)
3016 tree decl = VARRAY_TREE (deferred_fns, i);
3018 if (/* Check online inline functions that were actually used. */
3019 TREE_USED (decl) && DECL_DECLARED_INLINE_P (decl)
3020 /* But not defined. */
3021 && DECL_REALLY_EXTERN (decl)
3022 /* If we decided to emit this function in another
3023 translation unit, the fact that the definition was
3024 missing here likely indicates only that the repository
3025 decided to place the function elsewhere. With -Winline,
3026 we will still warn if we could not inline the
3028 && !flag_use_repository
3029 /* An explicit instantiation can be used to specify
3030 that the body is in another unit. It will have
3031 already verified there was a definition. */
3032 && !DECL_EXPLICIT_INSTANTIATION (decl))
3034 cp_warning_at ("inline function %qD used but never defined", decl);
3035 /* This symbol is effectively an "extern" declaration now.
3036 This is not strictly necessary, but removes a duplicate
3038 TREE_PUBLIC (decl) = 1;
3042 /* We give C linkage to static constructors and destructors. */
3043 push_lang_context (lang_name_c);
3045 /* Generate initialization and destruction functions for all
3046 priorities for which they are required. */
3047 if (priority_info_map)
3048 splay_tree_foreach (priority_info_map,
3049 generate_ctor_and_dtor_functions_for_priority,
3055 generate_ctor_or_dtor_function (/*constructor_p=*/true,
3056 DEFAULT_INIT_PRIORITY, &locus);
3058 generate_ctor_or_dtor_function (/*constructor_p=*/false,
3059 DEFAULT_INIT_PRIORITY, &locus);
3062 /* We're done with the splay-tree now. */
3063 if (priority_info_map)
3064 splay_tree_delete (priority_info_map);
3066 /* Generate any missing aliases. */
3067 maybe_apply_pending_pragma_weaks ();
3069 /* We're done with static constructors, so we can go back to "C++"
3071 pop_lang_context ();
3073 cgraph_finalize_compilation_unit ();
3076 /* Now, issue warnings about static, but not defined, functions,
3077 etc., and emit debugging information. */
3078 walk_namespaces (wrapup_globals_for_namespace, /*data=*/&reconsider);
3079 if (pending_statics)
3080 check_global_declarations (&VARRAY_TREE (pending_statics, 0),
3081 pending_statics_used);
3085 /* The entire file is now complete. If requested, dump everything
3089 FILE *stream = dump_begin (TDI_tu, &flags);
3093 dump_node (global_namespace, flags & ~TDF_SLIM, stream);
3094 dump_end (TDI_tu, stream);
3098 timevar_pop (TV_VARCONST);
3100 if (flag_detailed_statistics)
3102 dump_tree_statistics ();
3103 dump_time_statistics ();
3105 input_location = locus;
3107 #ifdef ENABLE_CHECKING
3108 validate_conversion_obstack ();
3109 #endif /* ENABLE_CHECKING */
3112 /* FN is an OFFSET_REF, DOTSTAR_EXPR or MEMBER_REF indicating the
3113 function to call in parse-tree form; it has not yet been
3114 semantically analyzed. ARGS are the arguments to the function.
3115 They have already been semantically analyzed. */
3118 build_offset_ref_call_from_tree (tree fn, tree args)
3127 object = TREE_OPERAND (fn, 0);
3129 if (processing_template_decl)
3131 gcc_assert (TREE_CODE (fn) == DOTSTAR_EXPR
3132 || TREE_CODE (fn) == MEMBER_REF);
3133 if (type_dependent_expression_p (fn)
3134 || any_type_dependent_arguments_p (args))
3135 return build_min_nt (CALL_EXPR, fn, args, NULL_TREE);
3137 /* Transform the arguments and add the implicit "this"
3138 parameter. That must be done before the FN is transformed
3139 because we depend on the form of FN. */
3140 args = build_non_dependent_args (args);
3141 if (TREE_CODE (fn) == DOTSTAR_EXPR)
3142 object = build_unary_op (ADDR_EXPR, object, 0);
3143 object = build_non_dependent_expr (object);
3144 args = tree_cons (NULL_TREE, object, args);
3145 /* Now that the arguments are done, transform FN. */
3146 fn = build_non_dependent_expr (fn);
3149 /* A qualified name corresponding to a bound pointer-to-member is
3150 represented as an OFFSET_REF:
3152 struct B { void g(); };
3154 void B::g() { (this->*p)(); } */
3155 if (TREE_CODE (fn) == OFFSET_REF)
3157 tree object_addr = build_unary_op (ADDR_EXPR, object, 0);
3158 fn = TREE_OPERAND (fn, 1);
3159 fn = get_member_function_from_ptrfunc (&object_addr, fn);
3160 args = tree_cons (NULL_TREE, object_addr, args);
3163 expr = build_function_call (fn, args);
3164 if (processing_template_decl && expr != error_mark_node)
3165 return build_min_non_dep (CALL_EXPR, expr, orig_fn, orig_args, NULL_TREE);
3171 check_default_args (tree x)
3173 tree arg = TYPE_ARG_TYPES (TREE_TYPE (x));
3174 bool saw_def = false;
3175 int i = 0 - (TREE_CODE (TREE_TYPE (x)) == METHOD_TYPE);
3176 for (; arg && arg != void_list_node; arg = TREE_CHAIN (arg), ++i)
3178 if (TREE_PURPOSE (arg))
3182 cp_error_at ("default argument missing for parameter %P of %q+#D",
3190 mark_used (tree decl)
3192 TREE_USED (decl) = 1;
3193 if (processing_template_decl || skip_evaluation)
3196 if (TREE_CODE (decl) == FUNCTION_DECL && DECL_DECLARED_INLINE_P (decl)
3197 && !TREE_ASM_WRITTEN (decl))
3198 /* Remember it, so we can check it was defined. */
3200 if (DECL_DEFERRED_FN (decl))
3202 note_vague_linkage_fn (decl);
3205 assemble_external (decl);
3207 /* Is it a synthesized method that needs to be synthesized? */
3208 if (TREE_CODE (decl) == FUNCTION_DECL
3209 && DECL_NONSTATIC_MEMBER_FUNCTION_P (decl)
3210 && DECL_ARTIFICIAL (decl)
3211 && !DECL_THUNK_P (decl)
3212 && ! DECL_INITIAL (decl)
3213 /* Kludge: don't synthesize for default args. */
3214 && current_function_decl)
3216 synthesize_method (decl);
3217 /* If we've already synthesized the method we don't need to
3218 instantiate it, so we can return right away. */
3222 /* If this is a function or variable that is an instance of some
3223 template, we now know that we will need to actually do the
3224 instantiation. We check that DECL is not an explicit
3225 instantiation because that is not checked in instantiate_decl. */
3226 if ((DECL_NON_THUNK_FUNCTION_P (decl) || TREE_CODE (decl) == VAR_DECL)
3227 && DECL_LANG_SPECIFIC (decl) && DECL_TEMPLATE_INFO (decl)
3228 && (!DECL_EXPLICIT_INSTANTIATION (decl)
3229 || (TREE_CODE (decl) == FUNCTION_DECL
3230 && DECL_INLINE (DECL_TEMPLATE_RESULT
3231 (template_for_substitution (decl))))))
3232 /* We put off instantiating functions in order to improve compile
3233 times. Maintaining a stack of active functions is expensive,
3234 and the inliner knows to instantiate any functions it might
3236 instantiate_decl (decl, /*defer_ok=*/true, /*undefined_ok=*/0);
3239 #include "gt-cp-decl2.h"