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"
52 extern cpp_reader *parse_in;
54 /* This structure contains information about the initializations
55 and/or destructions required for a particular priority level. */
56 typedef struct priority_info_s {
57 /* Nonzero if there have been any initializations at this priority
58 throughout the translation unit. */
59 int initializations_p;
60 /* Nonzero if there have been any destructions at this priority
61 throughout the translation unit. */
65 static void mark_vtable_entries (tree);
66 static void grok_function_init (tree, tree);
67 static bool maybe_emit_vtables (tree);
68 static tree build_anon_union_vars (tree);
69 static bool acceptable_java_type (tree);
70 static tree start_objects (int, int);
71 static void finish_objects (int, int, tree);
72 static tree start_static_storage_duration_function (unsigned);
73 static void finish_static_storage_duration_function (tree);
74 static priority_info get_priority_info (int);
75 static void do_static_initialization (tree, tree);
76 static void do_static_destruction (tree);
77 static tree start_static_initialization_or_destruction (tree, int);
78 static void finish_static_initialization_or_destruction (tree);
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);
87 /* A list of static class variables. This is needed, because a
88 static class variable can be declared inside the class without
89 an initializer, and then initialized, statically, outside the class. */
90 static GTY(()) varray_type pending_statics;
91 #define pending_statics_used \
92 (pending_statics ? pending_statics->elements_used : 0)
94 /* A list of functions which were declared inline, but which we
95 may need to emit outline anyway. */
96 static GTY(()) varray_type deferred_fns;
97 #define deferred_fns_used \
98 (deferred_fns ? deferred_fns->elements_used : 0)
100 /* Flag used when debugging spew.c */
102 extern int spew_debug;
104 /* Nonzero if we're done parsing and into end-of-file activities. */
108 /* Functions called along with real static constructors and destructors. */
114 /* Incorporate `const' and `volatile' qualifiers for member functions.
115 FUNCTION is a TYPE_DECL or a FUNCTION_DECL.
116 QUALS is a list of qualifiers. Returns any explicit
117 top-level qualifiers of the method's this pointer, anything other than
118 TYPE_UNQUALIFIED will be an extension. */
121 grok_method_quals (tree ctype, tree function, cp_cv_quals quals)
123 tree fntype = TREE_TYPE (function);
124 tree raises = TYPE_RAISES_EXCEPTIONS (fntype);
125 int type_quals = TYPE_UNQUALIFIED;
126 int this_quals = TYPE_UNQUALIFIED;
128 type_quals = quals & ~TYPE_QUAL_RESTRICT;
129 this_quals = quals & TYPE_QUAL_RESTRICT;
131 ctype = cp_build_qualified_type (ctype, type_quals);
132 fntype = build_method_type_directly (ctype, TREE_TYPE (fntype),
133 (TREE_CODE (fntype) == METHOD_TYPE
134 ? TREE_CHAIN (TYPE_ARG_TYPES (fntype))
135 : TYPE_ARG_TYPES (fntype)));
137 fntype = build_exception_variant (fntype, raises);
139 TREE_TYPE (function) = fntype;
143 /* Build a PARM_DECL with NAME and TYPE, and set DECL_ARG_TYPE
147 cp_build_parm_decl (tree name, tree type)
149 tree parm = build_decl (PARM_DECL, name, type);
150 /* DECL_ARG_TYPE is only used by the back end and the back end never
152 if (!processing_template_decl)
153 DECL_ARG_TYPE (parm) = type_passed_as (type);
157 /* Returns a PARM_DECL for a parameter of the indicated TYPE, with the
161 build_artificial_parm (tree name, tree type)
163 tree parm = cp_build_parm_decl (name, type);
164 DECL_ARTIFICIAL (parm) = 1;
165 /* All our artificial parms are implicitly `const'; they cannot be
167 TREE_READONLY (parm) = 1;
171 /* Constructors for types with virtual baseclasses need an "in-charge" flag
172 saying whether this constructor is responsible for initialization of
173 virtual baseclasses or not. All destructors also need this "in-charge"
174 flag, which additionally determines whether or not the destructor should
175 free the memory for the object.
177 This function adds the "in-charge" flag to member function FN if
178 appropriate. It is called from grokclassfn and tsubst.
179 FN must be either a constructor or destructor.
181 The in-charge flag follows the 'this' parameter, and is followed by the
182 VTT parm (if any), then the user-written parms. */
185 maybe_retrofit_in_chrg (tree fn)
187 tree basetype, arg_types, parms, parm, fntype;
189 /* If we've already add the in-charge parameter don't do it again. */
190 if (DECL_HAS_IN_CHARGE_PARM_P (fn))
193 /* When processing templates we can't know, in general, whether or
194 not we're going to have virtual baseclasses. */
195 if (processing_template_decl)
198 /* We don't need an in-charge parameter for constructors that don't
199 have virtual bases. */
200 if (DECL_CONSTRUCTOR_P (fn)
201 && !CLASSTYPE_VBASECLASSES (DECL_CONTEXT (fn)))
204 arg_types = TYPE_ARG_TYPES (TREE_TYPE (fn));
205 basetype = TREE_TYPE (TREE_VALUE (arg_types));
206 arg_types = TREE_CHAIN (arg_types);
208 parms = TREE_CHAIN (DECL_ARGUMENTS (fn));
210 /* If this is a subobject constructor or destructor, our caller will
211 pass us a pointer to our VTT. */
212 if (CLASSTYPE_VBASECLASSES (DECL_CONTEXT (fn)))
214 parm = build_artificial_parm (vtt_parm_identifier, vtt_parm_type);
216 /* First add it to DECL_ARGUMENTS between 'this' and the real args... */
217 TREE_CHAIN (parm) = parms;
220 /* ...and then to TYPE_ARG_TYPES. */
221 arg_types = hash_tree_chain (vtt_parm_type, arg_types);
223 DECL_HAS_VTT_PARM_P (fn) = 1;
226 /* Then add the in-charge parm (before the VTT parm). */
227 parm = build_artificial_parm (in_charge_identifier, integer_type_node);
228 TREE_CHAIN (parm) = parms;
230 arg_types = hash_tree_chain (integer_type_node, arg_types);
232 /* Insert our new parameter(s) into the list. */
233 TREE_CHAIN (DECL_ARGUMENTS (fn)) = parms;
235 /* And rebuild the function type. */
236 fntype = build_method_type_directly (basetype, TREE_TYPE (TREE_TYPE (fn)),
238 if (TYPE_RAISES_EXCEPTIONS (TREE_TYPE (fn)))
239 fntype = build_exception_variant (fntype,
240 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (fn)));
241 TREE_TYPE (fn) = fntype;
243 /* Now we've got the in-charge parameter. */
244 DECL_HAS_IN_CHARGE_PARM_P (fn) = 1;
247 /* Classes overload their constituent function names automatically.
248 When a function name is declared in a record structure,
249 its name is changed to it overloaded name. Since names for
250 constructors and destructors can conflict, we place a leading
253 CNAME is the name of the class we are grokking for.
255 FUNCTION is a FUNCTION_DECL. It was created by `grokdeclarator'.
257 FLAGS contains bits saying what's special about today's
258 arguments. 1 == DESTRUCTOR. 2 == OPERATOR.
260 If FUNCTION is a destructor, then we must add the `auto-delete' field
261 as a second parameter. There is some hair associated with the fact
262 that we must "declare" this variable in the manner consistent with the
263 way the rest of the arguments were declared.
265 QUALS are the qualifiers for the this pointer. */
268 grokclassfn (tree ctype, tree function, enum overload_flags flags,
271 tree fn_name = DECL_NAME (function);
272 cp_cv_quals this_quals = TYPE_UNQUALIFIED;
274 /* Even within an `extern "C"' block, members get C++ linkage. See
275 [dcl.link] for details. */
276 SET_DECL_LANGUAGE (function, lang_cplusplus);
278 if (fn_name == NULL_TREE)
280 error ("name missing for member function");
281 fn_name = get_identifier ("<anonymous>");
282 DECL_NAME (function) = fn_name;
286 this_quals = grok_method_quals (ctype, function, quals);
288 if (TREE_CODE (TREE_TYPE (function)) == METHOD_TYPE)
290 /* Must add the class instance variable up front. */
291 /* Right now we just make this a pointer. But later
292 we may wish to make it special. */
293 tree type = TREE_VALUE (TYPE_ARG_TYPES (TREE_TYPE (function)));
297 /* The `this' parameter is implicitly `const'; it cannot be
299 this_quals |= TYPE_QUAL_CONST;
300 qual_type = cp_build_qualified_type (type, this_quals);
301 parm = build_artificial_parm (this_identifier, qual_type);
302 c_apply_type_quals_to_decl (this_quals, parm);
303 TREE_CHAIN (parm) = DECL_ARGUMENTS (function);
304 DECL_ARGUMENTS (function) = parm;
307 DECL_CONTEXT (function) = ctype;
309 if (flags == DTOR_FLAG)
310 DECL_DESTRUCTOR_P (function) = 1;
312 if (flags == DTOR_FLAG || DECL_CONSTRUCTOR_P (function))
313 maybe_retrofit_in_chrg (function);
316 /* Create an ARRAY_REF, checking for the user doing things backwards
320 grok_array_decl (tree array_expr, tree index_exp)
324 tree orig_array_expr = array_expr;
325 tree orig_index_exp = index_exp;
327 if (error_operand_p (array_expr) || error_operand_p (index_exp))
328 return error_mark_node;
330 if (processing_template_decl)
332 if (type_dependent_expression_p (array_expr)
333 || type_dependent_expression_p (index_exp))
334 return build_min_nt (ARRAY_REF, array_expr, index_exp,
335 NULL_TREE, NULL_TREE);
336 array_expr = build_non_dependent_expr (array_expr);
337 index_exp = build_non_dependent_expr (index_exp);
340 type = TREE_TYPE (array_expr);
342 type = non_reference (type);
344 /* If they have an `operator[]', use that. */
345 if (IS_AGGR_TYPE (type) || IS_AGGR_TYPE (TREE_TYPE (index_exp)))
346 expr = build_new_op (ARRAY_REF, LOOKUP_NORMAL,
347 array_expr, index_exp, NULL_TREE,
348 /*overloaded_p=*/NULL);
353 /* Otherwise, create an ARRAY_REF for a pointer or array type.
354 It is a little-known fact that, if `a' is an array and `i' is
355 an int, you can write `i[a]', which means the same thing as
357 if (TREE_CODE (type) == ARRAY_TYPE)
360 p1 = build_expr_type_conversion (WANT_POINTER, array_expr, false);
362 if (TREE_CODE (TREE_TYPE (index_exp)) == ARRAY_TYPE)
365 p2 = build_expr_type_conversion (WANT_POINTER, index_exp, false);
367 i1 = build_expr_type_conversion (WANT_INT | WANT_ENUM, array_expr,
369 i2 = build_expr_type_conversion (WANT_INT | WANT_ENUM, index_exp,
372 if ((p1 && i2) && (i1 && p2))
373 error ("ambiguous conversion for array subscript");
376 array_expr = p1, index_exp = i2;
378 array_expr = p2, index_exp = i1;
381 error ("invalid types %<%T[%T]%> for array subscript",
382 type, TREE_TYPE (index_exp));
383 return error_mark_node;
386 if (array_expr == error_mark_node || index_exp == error_mark_node)
387 error ("ambiguous conversion for array subscript");
389 expr = build_array_ref (array_expr, index_exp);
391 if (processing_template_decl && expr != error_mark_node)
392 return build_min_non_dep (ARRAY_REF, expr, orig_array_expr, orig_index_exp,
393 NULL_TREE, NULL_TREE);
397 /* Given the cast expression EXP, checking out its validity. Either return
398 an error_mark_node if there was an unavoidable error, return a cast to
399 void for trying to delete a pointer w/ the value 0, or return the
400 call to delete. If DOING_VEC is true, we handle things differently
401 for doing an array delete.
402 Implements ARM $5.3.4. This is called from the parser. */
405 delete_sanity (tree exp, tree size, bool doing_vec, int use_global_delete)
409 if (exp == error_mark_node)
412 if (processing_template_decl)
414 t = build_min (DELETE_EXPR, void_type_node, exp, size);
415 DELETE_EXPR_USE_GLOBAL (t) = use_global_delete;
416 DELETE_EXPR_USE_VEC (t) = doing_vec;
417 TREE_SIDE_EFFECTS (t) = 1;
421 exp = convert_from_reference (exp);
423 /* An array can't have been allocated by new, so complain. */
424 if (TREE_CODE (exp) == VAR_DECL
425 && TREE_CODE (TREE_TYPE (exp)) == ARRAY_TYPE)
426 warning ("deleting array %q#D", exp);
428 t = build_expr_type_conversion (WANT_POINTER, exp, true);
430 if (t == NULL_TREE || t == error_mark_node)
432 error ("type %q#T argument given to %<delete%>, expected pointer",
434 return error_mark_node;
437 type = TREE_TYPE (t);
439 /* As of Valley Forge, you can delete a pointer to const. */
441 /* You can't delete functions. */
442 if (TREE_CODE (TREE_TYPE (type)) == FUNCTION_TYPE)
444 error ("cannot delete a function. Only pointer-to-objects are "
445 "valid arguments to %<delete%>");
446 return error_mark_node;
449 /* Deleting ptr to void is undefined behavior [expr.delete/3]. */
450 if (TREE_CODE (TREE_TYPE (type)) == VOID_TYPE)
452 warning ("deleting %qT is undefined", type);
456 /* Deleting a pointer with the value zero is valid and has no effect. */
457 if (integer_zerop (t))
458 return build1 (NOP_EXPR, void_type_node, t);
461 return build_vec_delete (t, /*maxindex=*/NULL_TREE,
462 sfk_deleting_destructor,
465 return build_delete (type, t, sfk_deleting_destructor,
466 LOOKUP_NORMAL, use_global_delete);
469 /* Report an error if the indicated template declaration is not the
470 sort of thing that should be a member template. */
473 check_member_template (tree tmpl)
477 gcc_assert (TREE_CODE (tmpl) == TEMPLATE_DECL);
478 decl = DECL_TEMPLATE_RESULT (tmpl);
480 if (TREE_CODE (decl) == FUNCTION_DECL
481 || (TREE_CODE (decl) == TYPE_DECL
482 && IS_AGGR_TYPE (TREE_TYPE (decl))))
484 if (current_function_decl)
485 /* 14.5.2.2 [temp.mem]
487 A local class shall not have member templates. */
488 error ("invalid declaration of member template %q#D in local class",
491 if (TREE_CODE (decl) == FUNCTION_DECL && DECL_VIRTUAL_P (decl))
493 /* 14.5.2.3 [temp.mem]
495 A member function template shall not be virtual. */
497 ("invalid use of %<virtual%> in template declaration of %q#D",
499 DECL_VIRTUAL_P (decl) = 0;
502 /* The debug-information generating code doesn't know what to do
503 with member templates. */
504 DECL_IGNORED_P (tmpl) = 1;
507 error ("template declaration of %q#D", decl);
510 /* Return true iff TYPE is a valid Java parameter or return type. */
513 acceptable_java_type (tree type)
515 if (TREE_CODE (type) == VOID_TYPE || TYPE_FOR_JAVA (type))
517 if (TREE_CODE (type) == POINTER_TYPE || TREE_CODE (type) == REFERENCE_TYPE)
519 type = TREE_TYPE (type);
520 if (TREE_CODE (type) == RECORD_TYPE)
523 if (! TYPE_FOR_JAVA (type))
525 if (! CLASSTYPE_TEMPLATE_INFO (type))
527 args = CLASSTYPE_TI_ARGS (type);
528 i = TREE_VEC_LENGTH (args);
531 type = TREE_VEC_ELT (args, i);
532 if (TREE_CODE (type) == POINTER_TYPE)
533 type = TREE_TYPE (type);
534 if (! TYPE_FOR_JAVA (type))
543 /* For a METHOD in a Java class CTYPE, return true if
544 the parameter and return types are valid Java types.
545 Otherwise, print appropriate error messages, and return false. */
548 check_java_method (tree method)
551 tree arg_types = TYPE_ARG_TYPES (TREE_TYPE (method));
552 tree ret_type = TREE_TYPE (TREE_TYPE (method));
554 if (!acceptable_java_type (ret_type))
556 error ("Java method %qD has non-Java return type %qT",
561 arg_types = TREE_CHAIN (arg_types);
562 if (DECL_HAS_IN_CHARGE_PARM_P (method))
563 arg_types = TREE_CHAIN (arg_types);
564 if (DECL_HAS_VTT_PARM_P (method))
565 arg_types = TREE_CHAIN (arg_types);
567 for (; arg_types != NULL_TREE; arg_types = TREE_CHAIN (arg_types))
569 tree type = TREE_VALUE (arg_types);
570 if (!acceptable_java_type (type))
572 error ("Java method %qD has non-Java parameter type %qT",
580 /* Sanity check: report error if this function FUNCTION is not
581 really a member of the class (CTYPE) it is supposed to belong to.
582 TEMPLATE_PARMS is used to specify the template parameters of a member
583 template passed as FUNCTION_DECL. If the member template is passed as a
584 TEMPLATE_DECL, it can be NULL since the parameters can be extracted
585 from the declaration. If the function is not a function template, it
587 It returns the original declaration for the function, or NULL_TREE
588 if no declaration was found (and an error was emitted). */
591 check_classfn (tree ctype, tree function, tree template_parms)
596 if (DECL_USE_TEMPLATE (function)
597 && !(TREE_CODE (function) == TEMPLATE_DECL
598 && DECL_TEMPLATE_SPECIALIZATION (function))
599 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (function)))
600 /* Since this is a specialization of a member template,
601 we're not going to find the declaration in the class.
604 struct S { template <typename T> void f(T); };
605 template <> void S::f(int);
607 we're not going to find `S::f(int)', but there's no
608 reason we should, either. We let our callers know we didn't
609 find the method, but we don't complain. */
612 /* Basic sanity check: for a template function, the template parameters
613 either were not passed, or they are the same of DECL_TEMPLATE_PARMS. */
614 if (TREE_CODE (function) == TEMPLATE_DECL)
616 gcc_assert (!template_parms
617 || comp_template_parms (template_parms,
618 DECL_TEMPLATE_PARMS (function)));
619 template_parms = DECL_TEMPLATE_PARMS (function);
622 /* OK, is this a definition of a member template? */
623 is_template = (template_parms != NULL_TREE);
625 ix = class_method_index_for_fn (complete_type (ctype), function);
628 VEC(tree) *methods = CLASSTYPE_METHOD_VEC (ctype);
629 tree fndecls, fndecl = 0;
632 const char *format = NULL;
634 pop_p = push_scope (ctype);
635 for (fndecls = VEC_index (tree, methods, ix);
636 fndecls; fndecls = OVL_NEXT (fndecls))
640 fndecl = OVL_CURRENT (fndecls);
641 p1 = TYPE_ARG_TYPES (TREE_TYPE (function));
642 p2 = TYPE_ARG_TYPES (TREE_TYPE (fndecl));
644 /* We cannot simply call decls_match because this doesn't
645 work for static member functions that are pretending to
646 be methods, and because the name may have been changed by
649 /* Get rid of the this parameter on functions that become
651 if (DECL_STATIC_FUNCTION_P (fndecl)
652 && TREE_CODE (TREE_TYPE (function)) == METHOD_TYPE)
653 p1 = TREE_CHAIN (p1);
655 /* A member template definition only matches a member template
657 if (is_template != (TREE_CODE (fndecl) == TEMPLATE_DECL))
660 if (same_type_p (TREE_TYPE (TREE_TYPE (function)),
661 TREE_TYPE (TREE_TYPE (fndecl)))
662 && compparms (p1, p2)
664 || comp_template_parms (template_parms,
665 DECL_TEMPLATE_PARMS (fndecl)))
666 && (DECL_TEMPLATE_SPECIALIZATION (function)
667 == DECL_TEMPLATE_SPECIALIZATION (fndecl))
668 && (!DECL_TEMPLATE_SPECIALIZATION (function)
669 || (DECL_TI_TEMPLATE (function)
670 == DECL_TI_TEMPLATE (fndecl))))
676 return OVL_CURRENT (fndecls);
677 error ("prototype for %q#D does not match any in class %qT",
679 is_conv_op = DECL_CONV_FN_P (fndecl);
682 ix = CLASSTYPE_FIRST_CONVERSION_SLOT;
683 fndecls = VEC_index (tree, methods, ix);
686 fndecl = OVL_CURRENT (fndecls);
687 fndecls = OVL_NEXT (fndecls);
689 if (!fndecls && is_conv_op)
691 if (VEC_length (tree, methods) > (size_t) ++ix)
693 fndecls = VEC_index (tree, methods, ix);
694 if (!DECL_CONV_FN_P (OVL_CURRENT (fndecls)))
706 format = "candidates are: %#D";
708 format = "candidate is: %#D";
709 cp_error_at (format, fndecl);
712 else if (!COMPLETE_TYPE_P (ctype))
713 cxx_incomplete_type_error (function, ctype);
715 error ("no %q#D member function declared in class %qT",
718 /* If we did not find the method in the class, add it to avoid
719 spurious errors (unless the CTYPE is not yet defined, in which
720 case we'll only confuse ourselves when the function is declared
721 properly within the class. */
722 if (COMPLETE_TYPE_P (ctype))
723 add_method (ctype, function);
727 /* DECL is a function with vague linkage. Remember it so that at the
728 end of the translation unit we can decide whether or not to emit
732 note_vague_linkage_fn (tree decl)
734 if (!DECL_DEFERRED_FN (decl))
736 DECL_DEFERRED_FN (decl) = 1;
737 DECL_DEFER_OUTPUT (decl) = 1;
739 VARRAY_TREE_INIT (deferred_fns, 32, "deferred_fns");
740 VARRAY_PUSH_TREE (deferred_fns, decl);
744 /* Like note_vague_linkage_fn but for variables. */
747 note_vague_linkage_var (tree var)
749 if (!pending_statics)
750 VARRAY_TREE_INIT (pending_statics, 32, "pending_statics");
751 VARRAY_PUSH_TREE (pending_statics, var);
754 /* We have just processed the DECL, which is a static data member.
755 Its initializer, if present, is INIT. The ASMSPEC_TREE, if
756 present, is the assembly-language name for the data member.
757 FLAGS is as for cp_finish_decl. */
760 finish_static_data_member_decl (tree decl, tree init, tree asmspec_tree,
763 gcc_assert (TREE_PUBLIC (decl));
765 DECL_CONTEXT (decl) = current_class_type;
767 /* We cannot call pushdecl here, because that would fill in the
768 TREE_CHAIN of our decl. Instead, we modify cp_finish_decl to do
769 the right thing, namely, to put this decl out straight away. */
770 /* current_class_type can be NULL_TREE in case of error. */
771 if (!asmspec_tree && current_class_type)
772 DECL_INITIAL (decl) = error_mark_node;
774 if (! processing_template_decl)
775 note_vague_linkage_var (decl);
777 if (LOCAL_CLASS_P (current_class_type))
778 pedwarn ("local class %q#T shall not have static data member %q#D",
779 current_class_type, decl);
781 /* Static consts need not be initialized in the class definition. */
782 if (init != NULL_TREE && TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl)))
784 static int explained = 0;
786 error ("initializer invalid for static member with constructor");
789 error ("(an out of class initialization is required)");
794 /* Force the compiler to know when an uninitialized static const
795 member is being used. */
796 if (CP_TYPE_CONST_P (TREE_TYPE (decl)) && init == 0)
797 TREE_USED (decl) = 1;
798 DECL_INITIAL (decl) = init;
799 DECL_IN_AGGR_P (decl) = 1;
801 cp_finish_decl (decl, init, asmspec_tree, flags);
804 /* Process the specs, declarator (NULL if omitted) and width (NULL if omitted)
805 of a structure component, returning a _DECL node.
806 QUALS is a list of type qualifiers for this decl (such as for declaring
807 const member functions).
809 This is done during the parsing of the struct declaration.
810 The _DECL nodes are chained together and the lot of them
811 are ultimately passed to `build_struct' to make the RECORD_TYPE node.
813 If class A defines that certain functions in class B are friends, then
814 the way I have set things up, it is B who is interested in permission
815 granted by A. However, it is in A's context that these declarations
816 are parsed. By returning a void_type_node, class A does not attempt
817 to incorporate the declarations of the friends within its structure.
819 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
820 CHANGES TO CODE IN `start_method'. */
823 grokfield (const cp_declarator *declarator,
824 cp_decl_specifier_seq *declspecs,
825 tree init, tree asmspec_tree,
829 const char *asmspec = 0;
830 int flags = LOOKUP_ONLYCONVERTING;
832 if (!declspecs->any_specifiers_p
833 && declarator->kind == cdk_id
834 && TREE_CODE (declarator->u.id.name) == SCOPE_REF
835 && (TREE_CODE (TREE_OPERAND (declarator->u.id.name, 1))
837 /* Access declaration */
838 return do_class_using_decl (declarator->u.id.name);
841 && TREE_CODE (init) == TREE_LIST
842 && TREE_VALUE (init) == error_mark_node
843 && TREE_CHAIN (init) == NULL_TREE)
846 value = grokdeclarator (declarator, declspecs, FIELD, init != 0, &attrlist);
847 if (! value || error_operand_p (value))
848 /* friend or constructor went bad. */
849 return error_mark_node;
851 if (TREE_CODE (value) == TYPE_DECL && init)
853 error ("typedef %qD is initialized (use __typeof__ instead)", value);
857 /* Pass friendly classes back. */
858 if (value == void_type_node)
861 /* Pass friend decls back. */
862 if ((TREE_CODE (value) == FUNCTION_DECL
863 || TREE_CODE (value) == TEMPLATE_DECL)
864 && DECL_CONTEXT (value) != current_class_type)
867 if (DECL_NAME (value) != NULL_TREE
868 && IDENTIFIER_POINTER (DECL_NAME (value))[0] == '_'
869 && ! strcmp (IDENTIFIER_POINTER (DECL_NAME (value)), "_vptr"))
870 error ("member %qD conflicts with virtual function table field name",
873 /* Stash away type declarations. */
874 if (TREE_CODE (value) == TYPE_DECL)
876 DECL_NONLOCAL (value) = 1;
877 DECL_CONTEXT (value) = current_class_type;
879 if (processing_template_decl)
880 value = push_template_decl (value);
883 cplus_decl_attributes (&value, attrlist, 0);
888 if (DECL_IN_AGGR_P (value))
890 error ("%qD is already defined in %qT", value, DECL_CONTEXT (value));
891 return void_type_node;
895 asmspec = TREE_STRING_POINTER (asmspec_tree);
899 if (TREE_CODE (value) == FUNCTION_DECL)
901 grok_function_init (value, init);
904 else if (pedantic && TREE_CODE (value) != VAR_DECL)
905 /* Already complained in grokdeclarator. */
909 /* We allow initializers to become parameters to base
911 if (TREE_CODE (init) == TREE_LIST)
913 if (TREE_CHAIN (init) == NULL_TREE)
914 init = TREE_VALUE (init);
916 init = digest_init (TREE_TYPE (value), init, (tree *)0);
919 if (!processing_template_decl)
921 if (TREE_CODE (init) == CONST_DECL)
922 init = DECL_INITIAL (init);
923 else if (TREE_READONLY_DECL_P (init))
924 init = decl_constant_value (init);
925 else if (TREE_CODE (init) == CONSTRUCTOR)
926 init = digest_init (TREE_TYPE (value), init, (tree *)0);
927 if (init != error_mark_node && ! TREE_CONSTANT (init))
929 /* We can allow references to things that are effectively
930 static, since references are initialized with the
932 if (TREE_CODE (TREE_TYPE (value)) != REFERENCE_TYPE
933 || (TREE_STATIC (init) == 0
934 && (!DECL_P (init) || DECL_EXTERNAL (init) == 0)))
936 error ("field initializer is not constant");
937 init = error_mark_node;
944 if (processing_template_decl
945 && (TREE_CODE (value) == VAR_DECL || TREE_CODE (value) == FUNCTION_DECL))
947 value = push_template_decl (value);
948 if (error_operand_p (value))
949 return error_mark_node;
953 cplus_decl_attributes (&value, attrlist, 0);
955 switch (TREE_CODE (value))
958 finish_static_data_member_decl (value, init, asmspec_tree,
964 error ("%<asm%> specifiers are not permitted on non-static data members");
965 if (DECL_INITIAL (value) == error_mark_node)
966 init = error_mark_node;
967 cp_finish_decl (value, init, NULL_TREE, flags);
968 DECL_INITIAL (value) = init;
969 DECL_IN_AGGR_P (value) = 1;
974 set_user_assembler_name (value, asmspec);
975 if (!DECL_FRIEND_P (value))
976 grok_special_member_properties (value);
978 cp_finish_decl (value, init, asmspec_tree, flags);
980 /* Pass friends back this way. */
981 if (DECL_FRIEND_P (value))
982 return void_type_node;
984 DECL_IN_AGGR_P (value) = 1;
993 /* Like `grokfield', but for bitfields.
994 WIDTH is non-NULL for bit fields only, and is an INTEGER_CST node. */
997 grokbitfield (const cp_declarator *declarator,
998 cp_decl_specifier_seq *declspecs, tree width)
1000 tree value = grokdeclarator (declarator, declspecs, BITFIELD, 0, NULL);
1002 if (! value) return NULL_TREE; /* friends went bad. */
1004 /* Pass friendly classes back. */
1005 if (TREE_CODE (value) == VOID_TYPE)
1006 return void_type_node;
1008 if (TREE_CODE (value) == TYPE_DECL)
1010 error ("cannot declare %qD to be a bit-field type", value);
1014 /* Usually, finish_struct_1 catches bitfields with invalid types.
1015 But, in the case of bitfields with function type, we confuse
1016 ourselves into thinking they are member functions, so we must
1018 if (TREE_CODE (value) == FUNCTION_DECL)
1020 error ("cannot declare bit-field %qD with function type",
1025 if (DECL_IN_AGGR_P (value))
1027 error ("%qD is already defined in the class %qT", value,
1028 DECL_CONTEXT (value));
1029 return void_type_node;
1032 if (TREE_STATIC (value))
1034 error ("static member %qD cannot be a bit-field", value);
1037 cp_finish_decl (value, NULL_TREE, NULL_TREE, 0);
1039 if (width != error_mark_node)
1041 constant_expression_warning (width);
1042 DECL_INITIAL (value) = width;
1043 SET_DECL_C_BIT_FIELD (value);
1046 DECL_IN_AGGR_P (value) = 1;
1050 /* When a function is declared with an initializer,
1051 do the right thing. Currently, there are two possibilities:
1056 // initialization possibility #1.
1057 virtual void f () = 0;
1079 // initialization possibility #2
1086 grok_function_init (tree decl, tree init)
1088 /* An initializer for a function tells how this function should
1090 tree type = TREE_TYPE (decl);
1092 if (TREE_CODE (type) == FUNCTION_TYPE)
1093 error ("initializer specified for non-member function %qD", decl);
1094 else if (integer_zerop (init))
1095 DECL_PURE_VIRTUAL_P (decl) = 1;
1097 error ("invalid initializer for virtual method %qD", decl);
1101 cplus_decl_attributes (tree *decl, tree attributes, int flags)
1103 if (*decl == NULL_TREE || *decl == void_type_node)
1106 if (TREE_CODE (*decl) == TEMPLATE_DECL)
1107 decl = &DECL_TEMPLATE_RESULT (*decl);
1109 decl_attributes (decl, attributes, flags);
1111 if (TREE_CODE (*decl) == TYPE_DECL)
1112 SET_IDENTIFIER_TYPE_VALUE (DECL_NAME (*decl), TREE_TYPE (*decl));
1115 /* Walks through the namespace- or function-scope anonymous union OBJECT,
1116 building appropriate ALIAS_DECLs. Returns one of the fields for use in
1117 the mangled name. */
1120 build_anon_union_vars (tree object)
1122 tree type = TREE_TYPE (object);
1123 tree main_decl = NULL_TREE;
1126 /* Rather than write the code to handle the non-union case,
1127 just give an error. */
1128 if (TREE_CODE (type) != UNION_TYPE)
1129 error ("anonymous struct not inside named type");
1131 for (field = TYPE_FIELDS (type);
1133 field = TREE_CHAIN (field))
1138 if (DECL_ARTIFICIAL (field))
1140 if (TREE_CODE (field) != FIELD_DECL)
1142 cp_pedwarn_at ("%q#D invalid; an anonymous union can only "
1143 "have non-static data members",
1148 if (TREE_PRIVATE (field))
1149 cp_pedwarn_at ("private member %q#D in anonymous union", field);
1150 else if (TREE_PROTECTED (field))
1151 cp_pedwarn_at ("protected member %q#D in anonymous union", field);
1153 if (processing_template_decl)
1154 ref = build_min_nt (COMPONENT_REF, object,
1155 DECL_NAME (field), NULL_TREE);
1157 ref = build_class_member_access_expr (object, field, NULL_TREE,
1160 if (DECL_NAME (field))
1162 decl = build_decl (ALIAS_DECL, DECL_NAME (field), TREE_TYPE (field));
1163 DECL_INITIAL (decl) = ref;
1164 TREE_PUBLIC (decl) = 0;
1165 TREE_STATIC (decl) = 0;
1166 DECL_EXTERNAL (decl) = 1;
1167 decl = pushdecl (decl);
1169 else if (ANON_AGGR_TYPE_P (TREE_TYPE (field)))
1170 decl = build_anon_union_vars (ref);
1174 if (main_decl == NULL_TREE)
1181 /* Finish off the processing of a UNION_TYPE structure. If the union is an
1182 anonymous union, then all members must be laid out together. PUBLIC_P
1183 is nonzero if this union is not declared static. */
1186 finish_anon_union (tree anon_union_decl)
1192 if (anon_union_decl == error_mark_node)
1195 type = TREE_TYPE (anon_union_decl);
1196 public_p = TREE_PUBLIC (anon_union_decl);
1198 /* The VAR_DECL's context is the same as the TYPE's context. */
1199 DECL_CONTEXT (anon_union_decl) = DECL_CONTEXT (TYPE_NAME (type));
1201 if (TYPE_FIELDS (type) == NULL_TREE)
1206 error ("namespace-scope anonymous aggregates must be static");
1210 main_decl = build_anon_union_vars (anon_union_decl);
1211 if (main_decl == NULL_TREE)
1213 warning ("anonymous union with no members");
1217 if (!processing_template_decl)
1219 /* Use main_decl to set the mangled name. */
1220 DECL_NAME (anon_union_decl) = DECL_NAME (main_decl);
1221 mangle_decl (anon_union_decl);
1222 DECL_NAME (anon_union_decl) = NULL_TREE;
1225 pushdecl (anon_union_decl);
1226 if (building_stmt_tree ()
1227 && at_function_scope_p ())
1228 add_decl_expr (anon_union_decl);
1229 else if (!processing_template_decl)
1230 rest_of_decl_compilation (anon_union_decl,
1231 toplevel_bindings_p (), at_eof);
1234 /* Auxiliary functions to make type signatures for
1235 `operator new' and `operator delete' correspond to
1236 what compiler will be expecting. */
1239 coerce_new_type (tree type)
1242 tree args = TYPE_ARG_TYPES (type);
1244 gcc_assert (TREE_CODE (type) == FUNCTION_TYPE);
1246 if (!same_type_p (TREE_TYPE (type), ptr_type_node))
1249 error ("%<operator new%> must return type %qT", ptr_type_node);
1252 if (!args || args == void_list_node
1253 || !same_type_p (TREE_VALUE (args), size_type_node))
1256 if (args && args != void_list_node)
1257 args = TREE_CHAIN (args);
1258 pedwarn ("%<operator new%> takes type %<size_t%> (%qT) "
1259 "as first parameter", size_type_node);
1264 args = tree_cons (NULL_TREE, size_type_node, args);
1267 type = build_exception_variant
1268 (build_function_type (ptr_type_node, args),
1269 TYPE_RAISES_EXCEPTIONS (type));
1277 coerce_delete_type (tree type)
1280 tree args = TYPE_ARG_TYPES (type);
1282 gcc_assert (TREE_CODE (type) == FUNCTION_TYPE);
1284 if (!same_type_p (TREE_TYPE (type), void_type_node))
1287 error ("%<operator delete%> must return type %qT", void_type_node);
1290 if (!args || args == void_list_node
1291 || !same_type_p (TREE_VALUE (args), ptr_type_node))
1294 if (args && args != void_list_node)
1295 args = TREE_CHAIN (args);
1296 error ("%<operator delete%> takes type %qT as first parameter",
1302 args = tree_cons (NULL_TREE, ptr_type_node, args);
1305 type = build_exception_variant
1306 (build_function_type (void_type_node, args),
1307 TYPE_RAISES_EXCEPTIONS (type));
1316 mark_vtable_entries (tree decl)
1318 tree entries = CONSTRUCTOR_ELTS (DECL_INITIAL (decl));
1320 for (; entries; entries = TREE_CHAIN (entries))
1322 tree fnaddr = TREE_VALUE (entries);
1325 STRIP_NOPS (fnaddr);
1327 if (TREE_CODE (fnaddr) != ADDR_EXPR
1328 && TREE_CODE (fnaddr) != FDESC_EXPR)
1329 /* This entry is an offset: a virtual base class offset, a
1330 virtual call offset, an RTTI offset, etc. */
1333 fn = TREE_OPERAND (fnaddr, 0);
1334 TREE_ADDRESSABLE (fn) = 1;
1335 /* When we don't have vcall offsets, we output thunks whenever
1336 we output the vtables that contain them. With vcall offsets,
1337 we know all the thunks we'll need when we emit a virtual
1338 function, so we emit the thunks there instead. */
1339 if (DECL_THUNK_P (fn))
1340 use_thunk (fn, /*emit_p=*/0);
1345 /* Set DECL up to have the closest approximation of "initialized common"
1346 linkage available. */
1349 comdat_linkage (tree decl)
1352 make_decl_one_only (decl);
1353 else if (TREE_CODE (decl) == FUNCTION_DECL
1354 || (TREE_CODE (decl) == VAR_DECL && DECL_ARTIFICIAL (decl)))
1355 /* We can just emit function and compiler-generated variables
1356 statically; having multiple copies is (for the most part) only
1359 There are two correctness issues, however: the address of a
1360 template instantiation with external linkage should be the
1361 same, independent of what translation unit asks for the
1362 address, and this will not hold when we emit multiple copies of
1363 the function. However, there's little else we can do.
1365 Also, by default, the typeinfo implementation assumes that
1366 there will be only one copy of the string used as the name for
1367 each type. Therefore, if weak symbols are unavailable, the
1368 run-time library should perform a more conservative check; it
1369 should perform a string comparison, rather than an address
1371 TREE_PUBLIC (decl) = 0;
1374 /* Static data member template instantiations, however, cannot
1375 have multiple copies. */
1376 if (DECL_INITIAL (decl) == 0
1377 || DECL_INITIAL (decl) == error_mark_node)
1378 DECL_COMMON (decl) = 1;
1379 else if (EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl)))
1381 DECL_COMMON (decl) = 1;
1382 DECL_INITIAL (decl) = error_mark_node;
1384 else if (!DECL_EXPLICIT_INSTANTIATION (decl))
1386 /* We can't do anything useful; leave vars for explicit
1388 DECL_EXTERNAL (decl) = 1;
1389 DECL_NOT_REALLY_EXTERN (decl) = 0;
1393 if (DECL_LANG_SPECIFIC (decl))
1394 DECL_COMDAT (decl) = 1;
1397 /* For win32 we also want to put explicit instantiations in
1398 linkonce sections, so that they will be merged with implicit
1399 instantiations; otherwise we get duplicate symbol errors.
1400 For Darwin we do not want explicit instantiations to be
1404 maybe_make_one_only (tree decl)
1406 /* We used to say that this was not necessary on targets that support weak
1407 symbols, because the implicit instantiations will defer to the explicit
1408 one. However, that's not actually the case in SVR4; a strong definition
1409 after a weak one is an error. Also, not making explicit
1410 instantiations one_only means that we can end up with two copies of
1411 some template instantiations. */
1415 /* We can't set DECL_COMDAT on functions, or cp_finish_file will think
1416 we can get away with not emitting them if they aren't used. We need
1417 to for variables so that cp_finish_decl will update their linkage,
1418 because their DECL_INITIAL may not have been set properly yet. */
1420 if (!TARGET_WEAK_NOT_IN_ARCHIVE_TOC
1421 || (! DECL_EXPLICIT_INSTANTIATION (decl)
1422 && ! DECL_TEMPLATE_SPECIALIZATION (decl)))
1424 make_decl_one_only (decl);
1426 if (TREE_CODE (decl) == VAR_DECL)
1428 DECL_COMDAT (decl) = 1;
1429 /* Mark it needed so we don't forget to emit it. */
1430 mark_decl_referenced (decl);
1435 /* Determine whether or not we want to specifically import or export CTYPE,
1436 using various heuristics. */
1439 import_export_class (tree ctype)
1441 /* -1 for imported, 1 for exported. */
1442 int import_export = 0;
1444 /* It only makes sense to call this function at EOF. The reason is
1445 that this function looks at whether or not the first non-inline
1446 non-abstract virtual member function has been defined in this
1447 translation unit. But, we can't possibly know that until we've
1448 seen the entire translation unit. */
1449 gcc_assert (at_eof);
1451 if (CLASSTYPE_INTERFACE_KNOWN (ctype))
1454 /* If MULTIPLE_SYMBOL_SPACES is set and we saw a #pragma interface,
1455 we will have CLASSTYPE_INTERFACE_ONLY set but not
1456 CLASSTYPE_INTERFACE_KNOWN. In that case, we don't want to use this
1457 heuristic because someone will supply a #pragma implementation
1458 elsewhere, and deducing it here would produce a conflict. */
1459 if (CLASSTYPE_INTERFACE_ONLY (ctype))
1462 if (lookup_attribute ("dllimport", TYPE_ATTRIBUTES (ctype)))
1464 else if (lookup_attribute ("dllexport", TYPE_ATTRIBUTES (ctype)))
1466 else if (CLASSTYPE_IMPLICIT_INSTANTIATION (ctype)
1467 && !flag_implicit_templates)
1468 /* For a template class, without -fimplicit-templates, check the
1469 repository. If the virtual table is assigned to this
1470 translation unit, then export the class; otherwise, import
1472 import_export = repo_export_class_p (ctype) ? 1 : -1;
1473 else if (TYPE_POLYMORPHIC_P (ctype))
1475 /* The ABI specifies that the virtual table and associated
1476 information are emitted with the key method, if any. */
1477 tree method = CLASSTYPE_KEY_METHOD (ctype);
1478 /* If weak symbol support is not available, then we must be
1479 careful not to emit the vtable when the key function is
1480 inline. An inline function can be defined in multiple
1481 translation units. If we were to emit the vtable in each
1482 translation unit containing a definition, we would get
1483 multiple definition errors at link-time. */
1484 if (method && (flag_weak || ! DECL_DECLARED_INLINE_P (method)))
1485 import_export = (DECL_REALLY_EXTERN (method) ? -1 : 1);
1488 /* When MULTIPLE_SYMBOL_SPACES is set, we cannot count on seeing
1489 a definition anywhere else. */
1490 if (MULTIPLE_SYMBOL_SPACES && import_export == -1)
1493 /* Allow backends the chance to overrule the decision. */
1494 if (targetm.cxx.import_export_class)
1495 import_export = targetm.cxx.import_export_class (ctype, import_export);
1499 SET_CLASSTYPE_INTERFACE_KNOWN (ctype);
1500 CLASSTYPE_INTERFACE_ONLY (ctype) = (import_export < 0);
1504 /* Return true if VAR has already been provided to the back end; in that
1505 case VAR should not be modified further by the front end. */
1507 var_finalized_p (tree var)
1509 return cgraph_varpool_node (var)->finalized;
1512 /* DECL is a VAR_DECL or FUNCTION_DECL which, for whatever reason,
1513 must be emitted in this translation unit. Mark it as such. */
1516 mark_needed (tree decl)
1518 /* It's possible that we no longer need to set
1519 TREE_SYMBOL_REFERENCED here directly, but doing so is
1521 TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl)) = 1;
1522 mark_decl_referenced (decl);
1525 /* DECL is either a FUNCTION_DECL or a VAR_DECL. This function
1526 returns true if a definition of this entity should be provided in
1527 this object file. Callers use this function to determine whether
1528 or not to let the back end know that a definition of DECL is
1529 available in this translation unit. */
1532 decl_needed_p (tree decl)
1534 gcc_assert (TREE_CODE (decl) == VAR_DECL
1535 || TREE_CODE (decl) == FUNCTION_DECL);
1536 /* This function should only be called at the end of the translation
1537 unit. We cannot be sure of whether or not something will be
1538 COMDAT until that point. */
1539 gcc_assert (at_eof);
1541 /* All entities with external linkage that are not COMDAT should be
1542 emitted; they may be referred to from other object files. */
1543 if (TREE_PUBLIC (decl) && !DECL_COMDAT (decl))
1545 /* If this entity was used, let the back-end see it; it will decide
1546 whether or not to emit it into the object file. */
1547 if (TREE_USED (decl)
1548 || (DECL_ASSEMBLER_NAME_SET_P (decl)
1549 && TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl))))
1551 /* Otherwise, DECL does not need to be emitted -- yet. A subsequent
1552 reference to DECL might cause it to be emitted later. */
1556 /* If necessary, write out the vtables for the dynamic class CTYPE.
1557 Returns true if any vtables were emitted. */
1560 maybe_emit_vtables (tree ctype)
1566 /* If the vtables for this class have already been emitted there is
1567 nothing more to do. */
1568 primary_vtbl = CLASSTYPE_VTABLES (ctype);
1569 if (var_finalized_p (primary_vtbl))
1571 /* Ignore dummy vtables made by get_vtable_decl. */
1572 if (TREE_TYPE (primary_vtbl) == void_type_node)
1575 /* On some targets, we cannot determine the key method until the end
1576 of the translation unit -- which is when this function is
1578 if (!targetm.cxx.key_method_may_be_inline ())
1579 determine_key_method (ctype);
1581 /* See if any of the vtables are needed. */
1582 for (vtbl = CLASSTYPE_VTABLES (ctype); vtbl; vtbl = TREE_CHAIN (vtbl))
1584 import_export_decl (vtbl);
1585 if (DECL_NOT_REALLY_EXTERN (vtbl) && decl_needed_p (vtbl))
1590 /* If the references to this class' vtables are optimized away,
1591 still emit the appropriate debugging information. See
1593 if (DECL_COMDAT (primary_vtbl)
1594 && CLASSTYPE_DEBUG_REQUESTED (ctype))
1595 note_debug_info_needed (ctype);
1599 /* The ABI requires that we emit all of the vtables if we emit any
1601 for (vtbl = CLASSTYPE_VTABLES (ctype); vtbl; vtbl = TREE_CHAIN (vtbl))
1603 /* Mark entities references from the virtual table as used. */
1604 mark_vtable_entries (vtbl);
1606 if (TREE_TYPE (DECL_INITIAL (vtbl)) == 0)
1608 tree expr = store_init_value (vtbl, DECL_INITIAL (vtbl));
1610 /* It had better be all done at compile-time. */
1615 DECL_EXTERNAL (vtbl) = 0;
1616 rest_of_decl_compilation (vtbl, 1, 1);
1618 /* Because we're only doing syntax-checking, we'll never end up
1619 actually marking the variable as written. */
1620 if (flag_syntax_only)
1621 TREE_ASM_WRITTEN (vtbl) = 1;
1624 /* Since we're writing out the vtable here, also write the debug
1626 note_debug_info_needed (ctype);
1631 /* Like c_determine_visibility, but with additional C++-specific
1635 determine_visibility (tree decl)
1639 /* Cloned constructors and destructors get the same visibility as
1640 the underlying function. That should be set up in
1641 maybe_clone_body. */
1642 gcc_assert (!DECL_CLONED_FUNCTION_P (decl));
1644 /* Give the common code a chance to make a determination. */
1645 if (c_determine_visibility (decl))
1648 /* If DECL is a member of a class, visibility specifiers on the
1649 class can influence the visibility of the DECL. */
1650 if (DECL_CLASS_SCOPE_P (decl))
1651 class_type = DECL_CONTEXT (decl);
1652 else if (TREE_CODE (decl) == VAR_DECL
1653 && DECL_TINFO_P (decl)
1654 && CLASS_TYPE_P (TREE_TYPE (DECL_NAME (decl))))
1655 class_type = TREE_TYPE (DECL_NAME (decl));
1658 /* Virtual tables have DECL_CONTEXT set to their associated class,
1659 so they are automatically handled above. */
1660 gcc_assert (TREE_CODE (decl) != VAR_DECL
1661 || !DECL_VTABLE_OR_VTT_P (decl));
1662 /* Entities not associated with any class just get the
1663 visibility specified by their attributes. */
1667 /* By default, static data members and function members receive
1668 the visibility of their containing class. */
1671 if (TARGET_DLLIMPORT_DECL_ATTRIBUTES
1672 && lookup_attribute ("dllexport", TYPE_ATTRIBUTES (class_type)))
1674 DECL_VISIBILITY (decl) = VISIBILITY_DEFAULT;
1675 DECL_VISIBILITY_SPECIFIED (decl) = 1;
1677 else if (TREE_CODE (decl) == FUNCTION_DECL
1678 && DECL_DECLARED_INLINE_P (decl)
1679 && visibility_options.inlines_hidden)
1681 DECL_VISIBILITY (decl) = VISIBILITY_HIDDEN;
1682 DECL_VISIBILITY_SPECIFIED (decl) = 1;
1684 else if (CLASSTYPE_VISIBILITY_SPECIFIED (class_type))
1686 DECL_VISIBILITY (decl) = CLASSTYPE_VISIBILITY (class_type);
1687 DECL_VISIBILITY_SPECIFIED (decl) = 1;
1689 /* If no explicit visibility information has been provided for
1690 this class, some targets require that class data be
1692 else if (TREE_CODE (decl) == VAR_DECL
1693 && targetm.cxx.export_class_data ()
1694 && (DECL_TINFO_P (decl)
1695 || (DECL_VTABLE_OR_VTT_P (decl)
1696 /* Construction virtual tables are not emitted
1697 because they cannot be referred to from other
1698 object files; their name is not standardized by
1700 && !DECL_CONSTRUCTION_VTABLE_P (decl))))
1701 DECL_VISIBILITY (decl) = VISIBILITY_DEFAULT;
1704 DECL_VISIBILITY (decl) = CLASSTYPE_VISIBILITY (class_type);
1705 DECL_VISIBILITY_SPECIFIED (decl) = 0;
1710 /* DECL is a FUNCTION_DECL or VAR_DECL. If the object file linkage
1711 for DECL has not already been determined, do so now by setting
1712 DECL_EXTERNAL, DECL_COMDAT and other related flags. Until this
1713 function is called entities with vague linkage whose definitions
1714 are available must have TREE_PUBLIC set.
1716 If this function decides to place DECL in COMDAT, it will set
1717 appropriate flags -- but will not clear DECL_EXTERNAL. It is up to
1718 the caller to decide whether or not to clear DECL_EXTERNAL. Some
1719 callers defer that decision until it is clear that DECL is actually
1723 import_export_decl (tree decl)
1729 if (DECL_INTERFACE_KNOWN (decl))
1732 /* We cannot determine what linkage to give to an entity with vague
1733 linkage until the end of the file. For example, a virtual table
1734 for a class will be defined if and only if the key method is
1735 defined in this translation unit. As a further example, consider
1736 that when compiling a translation unit that uses PCH file with
1737 "-frepo" it would be incorrect to make decisions about what
1738 entities to emit when building the PCH; those decisions must be
1739 delayed until the repository information has been processed. */
1740 gcc_assert (at_eof);
1741 /* Object file linkage for explicit instantiations is handled in
1742 mark_decl_instantiated. For static variables in functions with
1743 vague linkage, maybe_commonize_var is used.
1745 Therefore, the only declarations that should be provided to this
1746 function are those with external linkage that are:
1748 * implicit instantiations of function templates
1752 * implicit instantiations of static data members of class
1759 Furthermore, all entities that reach this point must have a
1760 definition available in this translation unit.
1762 The following assertions check these conditions. */
1763 gcc_assert (TREE_CODE (decl) == FUNCTION_DECL
1764 || TREE_CODE (decl) == VAR_DECL);
1765 /* Any code that creates entities with TREE_PUBLIC cleared should
1766 also set DECL_INTERFACE_KNOWN. */
1767 gcc_assert (TREE_PUBLIC (decl));
1768 if (TREE_CODE (decl) == FUNCTION_DECL)
1769 gcc_assert (DECL_IMPLICIT_INSTANTIATION (decl)
1770 || DECL_FRIEND_PSEUDO_TEMPLATE_INSTANTIATION (decl)
1771 || DECL_DECLARED_INLINE_P (decl));
1773 gcc_assert (DECL_IMPLICIT_INSTANTIATION (decl)
1774 || DECL_VTABLE_OR_VTT_P (decl)
1775 || DECL_TINFO_P (decl));
1776 /* Check that a definition of DECL is available in this translation
1778 gcc_assert (!DECL_REALLY_EXTERN (decl));
1780 /* Assume that DECL will not have COMDAT linkage. */
1782 /* Assume that DECL will not be imported into this translation
1786 /* See if the repository tells us whether or not to emit DECL in
1787 this translation unit. */
1788 emit_p = repo_emit_p (decl);
1791 else if (emit_p == 1)
1793 /* The repository indicates that this entity should be defined
1794 here. Make sure the back end honors that request. */
1795 if (TREE_CODE (decl) == VAR_DECL)
1797 else if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl)
1798 || DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P (decl))
1801 FOR_EACH_CLONE (clone, decl)
1802 mark_needed (clone);
1806 /* Output the definition as an ordinary strong definition. */
1807 DECL_EXTERNAL (decl) = 0;
1808 DECL_INTERFACE_KNOWN (decl) = 1;
1813 /* We have already decided what to do with this DECL; there is no
1814 need to check anything further. */
1816 else if (TREE_CODE (decl) == VAR_DECL && DECL_VTABLE_OR_VTT_P (decl))
1818 tree type = DECL_CONTEXT (decl);
1819 import_export_class (type);
1820 if (TYPE_FOR_JAVA (type))
1822 else if (CLASSTYPE_INTERFACE_KNOWN (type)
1823 && CLASSTYPE_INTERFACE_ONLY (type))
1825 else if (TARGET_WEAK_NOT_IN_ARCHIVE_TOC
1826 && !CLASSTYPE_USE_TEMPLATE (type)
1827 && CLASSTYPE_KEY_METHOD (type)
1828 && !DECL_DECLARED_INLINE_P (CLASSTYPE_KEY_METHOD (type)))
1829 /* The ABI requires that all virtual tables be emitted with
1830 COMDAT linkage. However, on systems where COMDAT symbols
1831 don't show up in the table of contents for a static
1832 archive, the linker will report errors about undefined
1833 symbols because it will not see the virtual table
1834 definition. Therefore, in the case that we know that the
1835 virtual table will be emitted in only one translation
1836 unit, we make the virtual table an ordinary definition
1837 with external linkage. */
1838 DECL_EXTERNAL (decl) = 0;
1839 else if (CLASSTYPE_INTERFACE_KNOWN (type))
1841 /* TYPE is being exported from this translation unit, so DECL
1842 should be defined here. The ABI requires COMDAT
1843 linkage. Normally, we only emit COMDAT things when they
1844 are needed; make sure that we realize that this entity is
1849 else if (!flag_implicit_templates
1850 && CLASSTYPE_IMPLICIT_INSTANTIATION (type))
1855 else if (TREE_CODE (decl) == VAR_DECL && DECL_TINFO_P (decl))
1857 tree type = TREE_TYPE (DECL_NAME (decl));
1858 if (CLASS_TYPE_P (type))
1860 import_export_class (type);
1861 if (CLASSTYPE_INTERFACE_KNOWN (type)
1862 && TYPE_POLYMORPHIC_P (type)
1863 && CLASSTYPE_INTERFACE_ONLY (type)
1864 /* If -fno-rtti was specified, then we cannot be sure
1865 that RTTI information will be emitted with the
1866 virtual table of the class, so we must emit it
1867 wherever it is used. */
1873 if (CLASSTYPE_INTERFACE_KNOWN (type)
1874 && !CLASSTYPE_INTERFACE_ONLY (type))
1881 else if (DECL_TEMPLATE_INSTANTIATION (decl)
1882 || DECL_FRIEND_PSEUDO_TEMPLATE_INSTANTIATION (decl))
1884 /* DECL is an implicit instantiation of a function or static
1886 if (flag_implicit_templates
1887 || (flag_implicit_inline_templates
1888 && TREE_CODE (decl) == FUNCTION_DECL
1889 && DECL_DECLARED_INLINE_P (decl)))
1892 /* If we are not implicitly generating templates, then mark
1893 this entity as undefined in this translation unit. */
1896 else if (DECL_FUNCTION_MEMBER_P (decl))
1898 if (!DECL_DECLARED_INLINE_P (decl))
1900 tree ctype = DECL_CONTEXT (decl);
1901 import_export_class (ctype);
1902 if (CLASSTYPE_INTERFACE_KNOWN (ctype))
1904 DECL_NOT_REALLY_EXTERN (decl)
1905 = ! (CLASSTYPE_INTERFACE_ONLY (ctype)
1906 || (DECL_DECLARED_INLINE_P (decl)
1907 && ! flag_implement_inlines
1908 && !DECL_VINDEX (decl)));
1910 if (!DECL_NOT_REALLY_EXTERN (decl))
1911 DECL_EXTERNAL (decl) = 1;
1913 /* Always make artificials weak. */
1914 if (DECL_ARTIFICIAL (decl) && flag_weak)
1917 maybe_make_one_only (decl);
1928 /* If we are importing DECL into this translation unit, mark is
1929 an undefined here. */
1930 DECL_EXTERNAL (decl) = 1;
1931 DECL_NOT_REALLY_EXTERN (decl) = 0;
1935 /* If we decided to put DECL in COMDAT, mark it accordingly at
1937 comdat_linkage (decl);
1940 DECL_INTERFACE_KNOWN (decl) = 1;
1943 /* Return an expression that performs the destruction of DECL, which
1944 must be a VAR_DECL whose type has a non-trivial destructor, or is
1945 an array whose (innermost) elements have a non-trivial destructor. */
1948 build_cleanup (tree decl)
1951 tree type = TREE_TYPE (decl);
1953 /* This function should only be called for declarations that really
1954 require cleanups. */
1955 gcc_assert (!TYPE_HAS_TRIVIAL_DESTRUCTOR (type));
1957 /* Treat all objects with destructors as used; the destructor may do
1958 something substantive. */
1961 if (TREE_CODE (type) == ARRAY_TYPE)
1965 cxx_mark_addressable (decl);
1966 temp = build1 (ADDR_EXPR, build_pointer_type (type), decl);
1968 temp = build_delete (TREE_TYPE (temp), temp,
1969 sfk_complete_destructor,
1970 LOOKUP_NORMAL|LOOKUP_NONVIRTUAL|LOOKUP_DESTRUCTOR, 0);
1974 /* Returns the initialization guard variable for the variable DECL,
1975 which has static storage duration. */
1978 get_guard (tree decl)
1983 sname = mangle_guard_variable (decl);
1984 guard = IDENTIFIER_GLOBAL_VALUE (sname);
1989 /* We use a type that is big enough to contain a mutex as well
1990 as an integer counter. */
1991 guard_type = targetm.cxx.guard_type ();
1992 guard = build_decl (VAR_DECL, sname, guard_type);
1994 /* The guard should have the same linkage as what it guards. */
1995 TREE_PUBLIC (guard) = TREE_PUBLIC (decl);
1996 TREE_STATIC (guard) = TREE_STATIC (decl);
1997 DECL_COMMON (guard) = DECL_COMMON (decl);
1998 DECL_ONE_ONLY (guard) = DECL_ONE_ONLY (decl);
1999 if (TREE_PUBLIC (decl))
2000 DECL_WEAK (guard) = DECL_WEAK (decl);
2002 DECL_ARTIFICIAL (guard) = 1;
2003 TREE_USED (guard) = 1;
2004 pushdecl_top_level_and_finish (guard, NULL_TREE);
2009 /* Return those bits of the GUARD variable that should be set when the
2010 guarded entity is actually initialized. */
2013 get_guard_bits (tree guard)
2015 if (!targetm.cxx.guard_mask_bit ())
2017 /* We only set the first byte of the guard, in order to leave room
2018 for a mutex in the high-order bits. */
2019 guard = build1 (ADDR_EXPR,
2020 build_pointer_type (TREE_TYPE (guard)),
2022 guard = build1 (NOP_EXPR,
2023 build_pointer_type (char_type_node),
2025 guard = build1 (INDIRECT_REF, char_type_node, guard);
2031 /* Return an expression which determines whether or not the GUARD
2032 variable has already been initialized. */
2035 get_guard_cond (tree guard)
2039 /* Check to see if the GUARD is zero. */
2040 guard = get_guard_bits (guard);
2042 /* Mask off all but the low bit. */
2043 if (targetm.cxx.guard_mask_bit ())
2045 guard_value = integer_one_node;
2046 if (!same_type_p (TREE_TYPE (guard_value), TREE_TYPE (guard)))
2047 guard_value = convert (TREE_TYPE (guard), guard_value);
2048 guard = cp_build_binary_op (BIT_AND_EXPR, guard, guard_value);
2051 guard_value = integer_zero_node;
2052 if (!same_type_p (TREE_TYPE (guard_value), TREE_TYPE (guard)))
2053 guard_value = convert (TREE_TYPE (guard), guard_value);
2054 return cp_build_binary_op (EQ_EXPR, guard, guard_value);
2057 /* Return an expression which sets the GUARD variable, indicating that
2058 the variable being guarded has been initialized. */
2061 set_guard (tree guard)
2065 /* Set the GUARD to one. */
2066 guard = get_guard_bits (guard);
2067 guard_init = integer_one_node;
2068 if (!same_type_p (TREE_TYPE (guard_init), TREE_TYPE (guard)))
2069 guard_init = convert (TREE_TYPE (guard), guard_init);
2070 return build_modify_expr (guard, NOP_EXPR, guard_init);
2073 /* Start the process of running a particular set of global constructors
2074 or destructors. Subroutine of do_[cd]tors. */
2077 start_objects (int method_type, int initp)
2083 /* Make ctor or dtor function. METHOD_TYPE may be 'I' or 'D'. */
2085 if (initp != DEFAULT_INIT_PRIORITY)
2095 sprintf (type, "%c%c%.5u", method_type, joiner, initp);
2098 sprintf (type, "%c", method_type);
2100 fndecl = build_lang_decl (FUNCTION_DECL,
2101 get_file_function_name_long (type),
2102 build_function_type (void_type_node,
2104 start_preparsed_function (fndecl, /*attrs=*/NULL_TREE, SF_PRE_PARSED);
2106 /* It can be a static function as long as collect2 does not have
2107 to scan the object file to find its ctor/dtor routine. */
2108 TREE_PUBLIC (current_function_decl) = ! targetm.have_ctors_dtors;
2110 /* Mark this declaration as used to avoid spurious warnings. */
2111 TREE_USED (current_function_decl) = 1;
2113 /* Mark this function as a global constructor or destructor. */
2114 if (method_type == 'I')
2115 DECL_GLOBAL_CTOR_P (current_function_decl) = 1;
2117 DECL_GLOBAL_DTOR_P (current_function_decl) = 1;
2118 DECL_LANG_SPECIFIC (current_function_decl)->decl_flags.u2sel = 1;
2120 body = begin_compound_stmt (BCS_FN_BODY);
2122 /* We cannot allow these functions to be elided, even if they do not
2123 have external linkage. And, there's no point in deferring
2124 compilation of thes functions; they're all going to have to be
2126 DECL_INLINE (current_function_decl) = 0;
2127 DECL_UNINLINABLE (current_function_decl) = 1;
2132 /* Finish the process of running a particular set of global constructors
2133 or destructors. Subroutine of do_[cd]tors. */
2136 finish_objects (int method_type, int initp, tree body)
2141 finish_compound_stmt (body);
2142 fn = finish_function (0);
2143 expand_or_defer_fn (fn);
2145 /* When only doing semantic analysis, and no RTL generation, we
2146 can't call functions that directly emit assembly code; there is
2147 no assembly file in which to put the code. */
2148 if (flag_syntax_only)
2151 if (targetm.have_ctors_dtors)
2153 rtx fnsym = XEXP (DECL_RTL (fn), 0);
2154 if (method_type == 'I')
2155 (* targetm.asm_out.constructor) (fnsym, initp);
2157 (* targetm.asm_out.destructor) (fnsym, initp);
2161 /* The names of the parameters to the function created to handle
2162 initializations and destructions for objects with static storage
2164 #define INITIALIZE_P_IDENTIFIER "__initialize_p"
2165 #define PRIORITY_IDENTIFIER "__priority"
2167 /* The name of the function we create to handle initializations and
2168 destructions for objects with static storage duration. */
2169 #define SSDF_IDENTIFIER "__static_initialization_and_destruction"
2171 /* The declaration for the __INITIALIZE_P argument. */
2172 static GTY(()) tree initialize_p_decl;
2174 /* The declaration for the __PRIORITY argument. */
2175 static GTY(()) tree priority_decl;
2177 /* The declaration for the static storage duration function. */
2178 static GTY(()) tree ssdf_decl;
2180 /* All the static storage duration functions created in this
2181 translation unit. */
2182 static GTY(()) varray_type ssdf_decls;
2184 /* A map from priority levels to information about that priority
2185 level. There may be many such levels, so efficient lookup is
2187 static splay_tree priority_info_map;
2189 /* Begins the generation of the function that will handle all
2190 initialization and destruction of objects with static storage
2191 duration. The function generated takes two parameters of type
2192 `int': __INITIALIZE_P and __PRIORITY. If __INITIALIZE_P is
2193 nonzero, it performs initializations. Otherwise, it performs
2194 destructions. It only performs those initializations or
2195 destructions with the indicated __PRIORITY. The generated function
2198 It is assumed that this function will only be called once per
2199 translation unit. */
2202 start_static_storage_duration_function (unsigned count)
2207 char id[sizeof (SSDF_IDENTIFIER) + 1 /* '\0' */ + 32];
2209 /* Create the identifier for this function. It will be of the form
2210 SSDF_IDENTIFIER_<number>. */
2211 sprintf (id, "%s_%u", SSDF_IDENTIFIER, count);
2213 /* Create the parameters. */
2214 parm_types = void_list_node;
2215 parm_types = tree_cons (NULL_TREE, integer_type_node, parm_types);
2216 parm_types = tree_cons (NULL_TREE, integer_type_node, parm_types);
2217 type = build_function_type (void_type_node, parm_types);
2219 /* Create the FUNCTION_DECL itself. */
2220 ssdf_decl = build_lang_decl (FUNCTION_DECL,
2221 get_identifier (id),
2223 TREE_PUBLIC (ssdf_decl) = 0;
2224 DECL_ARTIFICIAL (ssdf_decl) = 1;
2226 /* Put this function in the list of functions to be called from the
2227 static constructors and destructors. */
2230 VARRAY_TREE_INIT (ssdf_decls, 32, "ssdf_decls");
2232 /* Take this opportunity to initialize the map from priority
2233 numbers to information about that priority level. */
2234 priority_info_map = splay_tree_new (splay_tree_compare_ints,
2235 /*delete_key_fn=*/0,
2236 /*delete_value_fn=*/
2237 (splay_tree_delete_value_fn) &free);
2239 /* We always need to generate functions for the
2240 DEFAULT_INIT_PRIORITY so enter it now. That way when we walk
2241 priorities later, we'll be sure to find the
2242 DEFAULT_INIT_PRIORITY. */
2243 get_priority_info (DEFAULT_INIT_PRIORITY);
2246 VARRAY_PUSH_TREE (ssdf_decls, ssdf_decl);
2248 /* Create the argument list. */
2249 initialize_p_decl = cp_build_parm_decl
2250 (get_identifier (INITIALIZE_P_IDENTIFIER), integer_type_node);
2251 DECL_CONTEXT (initialize_p_decl) = ssdf_decl;
2252 TREE_USED (initialize_p_decl) = 1;
2253 priority_decl = cp_build_parm_decl
2254 (get_identifier (PRIORITY_IDENTIFIER), integer_type_node);
2255 DECL_CONTEXT (priority_decl) = ssdf_decl;
2256 TREE_USED (priority_decl) = 1;
2258 TREE_CHAIN (initialize_p_decl) = priority_decl;
2259 DECL_ARGUMENTS (ssdf_decl) = initialize_p_decl;
2261 /* Put the function in the global scope. */
2262 pushdecl (ssdf_decl);
2264 /* Start the function itself. This is equivalent to declaring the
2267 static void __ssdf (int __initialize_p, init __priority_p);
2269 It is static because we only need to call this function from the
2270 various constructor and destructor functions for this module. */
2271 start_preparsed_function (ssdf_decl,
2272 /*attrs=*/NULL_TREE,
2275 /* Set up the scope of the outermost block in the function. */
2276 body = begin_compound_stmt (BCS_FN_BODY);
2278 /* This function must not be deferred because we are depending on
2279 its compilation to tell us what is TREE_SYMBOL_REFERENCED. */
2280 DECL_INLINE (ssdf_decl) = 0;
2281 DECL_UNINLINABLE (ssdf_decl) = 1;
2286 /* Finish the generation of the function which performs initialization
2287 and destruction of objects with static storage duration. After
2288 this point, no more such objects can be created. */
2291 finish_static_storage_duration_function (tree body)
2293 /* Close out the function. */
2294 finish_compound_stmt (body);
2295 expand_or_defer_fn (finish_function (0));
2298 /* Return the information about the indicated PRIORITY level. If no
2299 code to handle this level has yet been generated, generate the
2300 appropriate prologue. */
2302 static priority_info
2303 get_priority_info (int priority)
2308 n = splay_tree_lookup (priority_info_map,
2309 (splay_tree_key) priority);
2312 /* Create a new priority information structure, and insert it
2314 pi = xmalloc (sizeof (struct priority_info_s));
2315 pi->initializations_p = 0;
2316 pi->destructions_p = 0;
2317 splay_tree_insert (priority_info_map,
2318 (splay_tree_key) priority,
2319 (splay_tree_value) pi);
2322 pi = (priority_info) n->value;
2327 /* Set up to handle the initialization or destruction of DECL. If
2328 INITP is nonzero, we are initializing the variable. Otherwise, we
2329 are destroying it. */
2332 start_static_initialization_or_destruction (tree decl, int initp)
2334 tree guard_if_stmt = NULL_TREE;
2341 /* Figure out the priority for this declaration. */
2342 priority = DECL_INIT_PRIORITY (decl);
2344 priority = DEFAULT_INIT_PRIORITY;
2346 /* Remember that we had an initialization or finalization at this
2348 pi = get_priority_info (priority);
2350 pi->initializations_p = 1;
2352 pi->destructions_p = 1;
2354 /* Trick the compiler into thinking we are at the file and line
2355 where DECL was declared so that error-messages make sense, and so
2356 that the debugger will show somewhat sensible file and line
2358 input_location = DECL_SOURCE_LOCATION (decl);
2364 Access control for implicit calls to the constructors,
2365 the conversion functions, or the destructor called to
2366 create and destroy a static data member is performed as
2367 if these calls appeared in the scope of the member's
2370 we pretend we are in a static member function of the class of
2371 which the DECL is a member. */
2372 if (member_p (decl))
2374 DECL_CONTEXT (current_function_decl) = DECL_CONTEXT (decl);
2375 DECL_STATIC_FUNCTION_P (current_function_decl) = 1;
2378 /* Conditionalize this initialization on being in the right priority
2379 and being initializing/finalizing appropriately. */
2380 guard_if_stmt = begin_if_stmt ();
2381 cond = cp_build_binary_op (EQ_EXPR,
2383 build_int_cst (NULL_TREE, priority));
2384 init_cond = initp ? integer_one_node : integer_zero_node;
2385 init_cond = cp_build_binary_op (EQ_EXPR,
2388 cond = cp_build_binary_op (TRUTH_ANDIF_EXPR, cond, init_cond);
2390 /* Assume we don't need a guard. */
2392 /* We need a guard if this is an object with external linkage that
2393 might be initialized in more than one place. (For example, a
2394 static data member of a template, when the data member requires
2396 if (TREE_PUBLIC (decl) && (DECL_COMMON (decl)
2397 || DECL_ONE_ONLY (decl)
2398 || DECL_WEAK (decl)))
2402 guard = get_guard (decl);
2404 /* When using __cxa_atexit, we just check the GUARD as we would
2405 for a local static. */
2406 if (flag_use_cxa_atexit)
2408 /* When using __cxa_atexit, we never try to destroy
2409 anything from a static destructor. */
2411 guard_cond = get_guard_cond (guard);
2413 /* If we don't have __cxa_atexit, then we will be running
2414 destructors from .fini sections, or their equivalents. So,
2415 we need to know how many times we've tried to initialize this
2416 object. We do initializations only if the GUARD is zero,
2417 i.e., if we are the first to initialize the variable. We do
2418 destructions only if the GUARD is one, i.e., if we are the
2419 last to destroy the variable. */
2422 = cp_build_binary_op (EQ_EXPR,
2423 build_unary_op (PREINCREMENT_EXPR,
2429 = cp_build_binary_op (EQ_EXPR,
2430 build_unary_op (PREDECREMENT_EXPR,
2435 cond = cp_build_binary_op (TRUTH_ANDIF_EXPR, cond, guard_cond);
2438 finish_if_stmt_cond (cond, guard_if_stmt);
2440 /* If we're using __cxa_atexit, we have not already set the GUARD,
2441 so we must do so now. */
2442 if (guard && initp && flag_use_cxa_atexit)
2443 finish_expr_stmt (set_guard (guard));
2445 return guard_if_stmt;
2448 /* We've just finished generating code to do an initialization or
2449 finalization. GUARD_IF_STMT is the if-statement we used to guard
2450 the initialization. */
2453 finish_static_initialization_or_destruction (tree guard_if_stmt)
2455 finish_then_clause (guard_if_stmt);
2456 finish_if_stmt (guard_if_stmt);
2458 /* Now that we're done with DECL we don't need to pretend to be a
2459 member of its class any longer. */
2460 DECL_CONTEXT (current_function_decl) = NULL_TREE;
2461 DECL_STATIC_FUNCTION_P (current_function_decl) = 0;
2464 /* Generate code to do the initialization of DECL, a VAR_DECL with
2465 static storage duration. The initialization is INIT. */
2468 do_static_initialization (tree decl, tree init)
2472 /* Set up for the initialization. */
2474 = start_static_initialization_or_destruction (decl,
2477 /* Perform the initialization. */
2479 finish_expr_stmt (init);
2481 /* If we're using __cxa_atexit, register a a function that calls the
2482 destructor for the object. */
2483 if (flag_use_cxa_atexit)
2484 finish_expr_stmt (register_dtor_fn (decl));
2487 finish_static_initialization_or_destruction (guard_if_stmt);
2490 /* Generate code to do the static destruction of DECL. If DECL may be
2491 initialized more than once in different object files, GUARD is the
2492 guard variable to check. PRIORITY is the priority for the
2496 do_static_destruction (tree decl)
2500 /* If we're using __cxa_atexit, then destructors are registered
2501 immediately after objects are initialized. */
2502 gcc_assert (!flag_use_cxa_atexit);
2504 /* If we don't need a destructor, there's nothing to do. */
2505 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
2508 /* Actually do the destruction. */
2509 guard_if_stmt = start_static_initialization_or_destruction (decl,
2511 finish_expr_stmt (build_cleanup (decl));
2512 finish_static_initialization_or_destruction (guard_if_stmt);
2515 /* VARS is a list of variables with static storage duration which may
2516 need initialization and/or finalization. Remove those variables
2517 that don't really need to be initialized or finalized, and return
2518 the resulting list. The order in which the variables appear in
2519 VARS is in reverse order of the order in which they should actually
2520 be initialized. The list we return is in the unreversed order;
2521 i.e., the first variable should be initialized first. */
2524 prune_vars_needing_no_initialization (tree *vars)
2527 tree result = NULL_TREE;
2532 tree decl = TREE_VALUE (t);
2533 tree init = TREE_PURPOSE (t);
2535 /* Deal gracefully with error. */
2536 if (decl == error_mark_node)
2538 var = &TREE_CHAIN (t);
2542 /* The only things that can be initialized are variables. */
2543 gcc_assert (TREE_CODE (decl) == VAR_DECL);
2545 /* If this object is not defined, we don't need to do anything
2547 if (DECL_EXTERNAL (decl))
2549 var = &TREE_CHAIN (t);
2553 /* Also, if the initializer already contains errors, we can bail
2555 if (init && TREE_CODE (init) == TREE_LIST
2556 && value_member (error_mark_node, init))
2558 var = &TREE_CHAIN (t);
2562 /* This variable is going to need initialization and/or
2563 finalization, so we add it to the list. */
2564 *var = TREE_CHAIN (t);
2565 TREE_CHAIN (t) = result;
2572 /* Make sure we have told the back end about all the variables in
2576 write_out_vars (tree vars)
2580 for (v = vars; v; v = TREE_CHAIN (v))
2582 tree var = TREE_VALUE (v);
2583 if (!var_finalized_p (var))
2585 import_export_decl (var);
2586 rest_of_decl_compilation (var, 1, 1);
2591 /* Generate a static constructor (if CONSTRUCTOR_P) or destructor
2592 (otherwise) that will initialize all gobal objects with static
2593 storage duration having the indicated PRIORITY. */
2596 generate_ctor_or_dtor_function (bool constructor_p, int priority,
2605 input_location = *locus;
2606 #ifdef USE_MAPPED_LOCATION
2612 /* We use `I' to indicate initialization and `D' to indicate
2614 function_key = constructor_p ? 'I' : 'D';
2616 /* We emit the function lazily, to avoid generating empty
2617 global constructors and destructors. */
2620 /* Call the static storage duration function with appropriate
2623 for (i = 0; i < ssdf_decls->elements_used; ++i)
2625 fndecl = VARRAY_TREE (ssdf_decls, i);
2627 /* Calls to pure or const functions will expand to nothing. */
2628 if (! (flags_from_decl_or_type (fndecl) & (ECF_CONST | ECF_PURE)))
2631 body = start_objects (function_key, priority);
2633 arguments = tree_cons (NULL_TREE,
2634 build_int_cst (NULL_TREE, priority),
2636 arguments = tree_cons (NULL_TREE,
2637 build_int_cst (NULL_TREE, constructor_p),
2639 finish_expr_stmt (build_function_call (fndecl, arguments));
2643 /* If we're generating code for the DEFAULT_INIT_PRIORITY, throw in
2644 calls to any functions marked with attributes indicating that
2645 they should be called at initialization- or destruction-time. */
2646 if (priority == DEFAULT_INIT_PRIORITY)
2650 for (fns = constructor_p ? static_ctors : static_dtors;
2652 fns = TREE_CHAIN (fns))
2654 fndecl = TREE_VALUE (fns);
2656 /* Calls to pure/const functions will expand to nothing. */
2657 if (! (flags_from_decl_or_type (fndecl) & (ECF_CONST | ECF_PURE)))
2660 body = start_objects (function_key, priority);
2661 finish_expr_stmt (build_function_call (fndecl, NULL_TREE));
2666 /* Close out the function. */
2668 finish_objects (function_key, priority, body);
2671 /* Generate constructor and destructor functions for the priority
2675 generate_ctor_and_dtor_functions_for_priority (splay_tree_node n, void * data)
2677 location_t *locus = data;
2678 int priority = (int) n->key;
2679 priority_info pi = (priority_info) n->value;
2681 /* Generate the functions themselves, but only if they are really
2683 if (pi->initializations_p
2684 || (priority == DEFAULT_INIT_PRIORITY && static_ctors))
2685 generate_ctor_or_dtor_function (/*constructor_p=*/true, priority, locus);
2686 if (pi->destructions_p
2687 || (priority == DEFAULT_INIT_PRIORITY && static_dtors))
2688 generate_ctor_or_dtor_function (/*constructor_p=*/false, priority, locus);
2690 /* Keep iterating. */
2694 /* Called via LANGHOOK_CALLGRAPH_ANALYZE_EXPR. It is supposed to mark
2695 decls referenced from frontend specific constructs; it will be called
2696 only for language-specific tree nodes.
2698 Here we must deal with member pointers. */
2701 cxx_callgraph_analyze_expr (tree *tp, int *walk_subtrees ATTRIBUTE_UNUSED,
2702 tree from ATTRIBUTE_UNUSED)
2706 switch (TREE_CODE (t))
2709 if (TYPE_PTRMEMFUNC_P (TREE_TYPE (t)))
2710 cgraph_mark_needed_node (cgraph_node (PTRMEM_CST_MEMBER (t)));
2713 if (TREE_CODE (BASELINK_FUNCTIONS (t)) == FUNCTION_DECL)
2714 cgraph_mark_needed_node (cgraph_node (BASELINK_FUNCTIONS (t)));
2717 if (DECL_VTABLE_OR_VTT_P (t))
2719 /* The ABI requires that all virtual tables be emitted
2720 whenever one of them is. */
2722 for (vtbl = CLASSTYPE_VTABLES (DECL_CONTEXT (t));
2724 vtbl = TREE_CHAIN (vtbl))
2725 mark_decl_referenced (vtbl);
2727 else if (DECL_CONTEXT (t)
2728 && TREE_CODE (DECL_CONTEXT (t)) == FUNCTION_DECL)
2729 /* If we need a static variable in a function, then we
2730 need the containing function. */
2731 mark_decl_referenced (DECL_CONTEXT (t));
2740 /* This routine is called from the last rule in yyparse ().
2741 Its job is to create all the code needed to initialize and
2742 destroy the global aggregates. We do the destruction
2743 first, since that way we only need to reverse the decls once. */
2746 cp_finish_file (void)
2752 unsigned ssdf_count = 0;
2755 locus = input_location;
2758 /* Bad parse errors. Just forget about it. */
2759 if (! global_bindings_p () || current_class_type || decl_namespace_list)
2763 c_common_write_pch ();
2765 #ifdef USE_MAPPED_LOCATION
2768 /* Otherwise, GDB can get confused, because in only knows
2769 about source for LINENO-1 lines. */
2773 /* We now have to write out all the stuff we put off writing out.
2776 o Template specializations that we have not yet instantiated,
2777 but which are needed.
2778 o Initialization and destruction for non-local objects with
2779 static storage duration. (Local objects with static storage
2780 duration are initialized when their scope is first entered,
2781 and are cleaned up via atexit.)
2782 o Virtual function tables.
2784 All of these may cause others to be needed. For example,
2785 instantiating one function may cause another to be needed, and
2786 generating the initializer for an object may cause templates to be
2787 instantiated, etc., etc. */
2789 timevar_push (TV_VARCONST);
2791 emit_support_tinfos ();
2799 /* If there are templates that we've put off instantiating, do
2801 instantiate_pending_templates (retries);
2804 /* Write out virtual tables as required. Note that writing out
2805 the virtual table for a template class may cause the
2806 instantiation of members of that class. If we write out
2807 vtables then we remove the class from our list so we don't
2808 have to look at it again. */
2810 while (keyed_classes != NULL_TREE
2811 && maybe_emit_vtables (TREE_VALUE (keyed_classes)))
2814 keyed_classes = TREE_CHAIN (keyed_classes);
2820 tree next = TREE_CHAIN (t);
2824 if (maybe_emit_vtables (TREE_VALUE (next)))
2827 TREE_CHAIN (t) = TREE_CHAIN (next);
2832 next = TREE_CHAIN (t);
2836 /* Write out needed type info variables. We have to be careful
2837 looping through unemitted decls, because emit_tinfo_decl may
2838 cause other variables to be needed. New elements will be
2839 appended, and we remove from the vector those that actually
2841 for (i = VEC_length (tree, unemitted_tinfo_decls);
2842 VEC_iterate (tree, unemitted_tinfo_decls, --i, t);)
2843 if (emit_tinfo_decl (t))
2846 VEC_unordered_remove (tree, unemitted_tinfo_decls, i);
2849 /* The list of objects with static storage duration is built up
2850 in reverse order. We clear STATIC_AGGREGATES so that any new
2851 aggregates added during the initialization of these will be
2852 initialized in the correct order when we next come around the
2854 vars = prune_vars_needing_no_initialization (&static_aggregates);
2860 /* We need to start a new initialization function each time
2861 through the loop. That's because we need to know which
2862 vtables have been referenced, and TREE_SYMBOL_REFERENCED
2863 isn't computed until a function is finished, and written
2864 out. That's a deficiency in the back-end. When this is
2865 fixed, these initialization functions could all become
2866 inline, with resulting performance improvements. */
2869 /* Set the line and file, so that it is obviously not from
2871 input_location = locus;
2872 ssdf_body = start_static_storage_duration_function (ssdf_count);
2874 /* Make sure the back end knows about all the variables. */
2875 write_out_vars (vars);
2877 /* First generate code to do all the initializations. */
2878 for (v = vars; v; v = TREE_CHAIN (v))
2879 do_static_initialization (TREE_VALUE (v),
2882 /* Then, generate code to do all the destructions. Do these
2883 in reverse order so that the most recently constructed
2884 variable is the first destroyed. If we're using
2885 __cxa_atexit, then we don't need to do this; functions
2886 were registered at initialization time to destroy the
2888 if (!flag_use_cxa_atexit)
2890 vars = nreverse (vars);
2891 for (v = vars; v; v = TREE_CHAIN (v))
2892 do_static_destruction (TREE_VALUE (v));
2897 /* Finish up the static storage duration function for this
2899 input_location = locus;
2900 finish_static_storage_duration_function (ssdf_body);
2902 /* All those initializations and finalizations might cause
2903 us to need more inline functions, more template
2904 instantiations, etc. */
2907 #ifdef USE_MAPPED_LOCATION
2914 /* Go through the set of inline functions whose bodies have not
2915 been emitted yet. If out-of-line copies of these functions
2916 are required, emit them. */
2917 for (i = 0; i < deferred_fns_used; ++i)
2919 tree decl = VARRAY_TREE (deferred_fns, i);
2921 /* Does it need synthesizing? */
2922 if (DECL_ARTIFICIAL (decl) && ! DECL_INITIAL (decl)
2923 && (! DECL_REALLY_EXTERN (decl) || DECL_INLINE (decl)))
2925 /* Even though we're already at the top-level, we push
2926 there again. That way, when we pop back a few lines
2927 hence, all of our state is restored. Otherwise,
2928 finish_function doesn't clean things up, and we end
2929 up with CURRENT_FUNCTION_DECL set. */
2930 push_to_top_level ();
2931 synthesize_method (decl);
2932 pop_from_top_level ();
2936 if (!DECL_SAVED_TREE (decl))
2939 import_export_decl (decl);
2941 /* We lie to the back-end, pretending that some functions
2942 are not defined when they really are. This keeps these
2943 functions from being put out unnecessarily. But, we must
2944 stop lying when the functions are referenced, or if they
2945 are not comdat since they need to be put out now. This
2946 is done in a separate for cycle, because if some deferred
2947 function is contained in another deferred function later
2948 in deferred_fns varray, rest_of_compilation would skip
2949 this function and we really cannot expand the same
2951 if (DECL_NOT_REALLY_EXTERN (decl)
2952 && DECL_INITIAL (decl)
2953 && decl_needed_p (decl))
2954 DECL_EXTERNAL (decl) = 0;
2956 /* If we're going to need to write this function out, and
2957 there's already a body for it, create RTL for it now.
2958 (There might be no body if this is a method we haven't
2959 gotten around to synthesizing yet.) */
2960 if (!DECL_EXTERNAL (decl)
2961 && decl_needed_p (decl)
2962 && !TREE_ASM_WRITTEN (decl)
2963 && !cgraph_node (decl)->local.finalized)
2965 /* We will output the function; no longer consider it in this
2967 DECL_DEFER_OUTPUT (decl) = 0;
2968 /* Generate RTL for this function now that we know we
2970 expand_or_defer_fn (decl);
2971 /* If we're compiling -fsyntax-only pretend that this
2972 function has been written out so that we don't try to
2974 if (flag_syntax_only)
2975 TREE_ASM_WRITTEN (decl) = 1;
2980 if (walk_namespaces (wrapup_globals_for_namespace, /*data=*/0))
2983 /* Static data members are just like namespace-scope globals. */
2984 for (i = 0; i < pending_statics_used; ++i)
2986 tree decl = VARRAY_TREE (pending_statics, i);
2987 if (var_finalized_p (decl) || DECL_REALLY_EXTERN (decl))
2989 import_export_decl (decl);
2990 /* If this static data member is needed, provide it to the
2992 if (DECL_NOT_REALLY_EXTERN (decl) && decl_needed_p (decl))
2993 DECL_EXTERNAL (decl) = 0;
2996 && wrapup_global_declarations (&VARRAY_TREE (pending_statics, 0),
2997 pending_statics_used))
3000 /* Ask the back end to emit functions and variables that are
3001 enqueued. These emissions may result in marking more entities
3003 if (cgraph_assemble_pending_functions ())
3005 if (cgraph_varpool_assemble_pending_decls ())
3012 /* All used inline functions must have a definition at this point. */
3013 for (i = 0; i < deferred_fns_used; ++i)
3015 tree decl = VARRAY_TREE (deferred_fns, i);
3017 if (/* Check online inline functions that were actually used. */
3018 TREE_USED (decl) && DECL_DECLARED_INLINE_P (decl)
3019 /* But not defined. */
3020 && DECL_REALLY_EXTERN (decl)
3021 /* If we decided to emit this function in another
3022 translation unit, the fact that the definition was
3023 missing here likely indicates only that the repository
3024 decided to place the function elsewhere. With -Winline,
3025 we will still warn if we could not inline the
3027 && !flag_use_repository
3028 /* An explicit instantiation can be used to specify
3029 that the body is in another unit. It will have
3030 already verified there was a definition. */
3031 && !DECL_EXPLICIT_INSTANTIATION (decl))
3033 cp_warning_at ("inline function %qD used but never defined", decl);
3034 /* This symbol is effectively an "extern" declaration now.
3035 This is not strictly necessary, but removes a duplicate
3037 TREE_PUBLIC (decl) = 1;
3041 /* We give C linkage to static constructors and destructors. */
3042 push_lang_context (lang_name_c);
3044 /* Generate initialization and destruction functions for all
3045 priorities for which they are required. */
3046 if (priority_info_map)
3047 splay_tree_foreach (priority_info_map,
3048 generate_ctor_and_dtor_functions_for_priority,
3054 generate_ctor_or_dtor_function (/*constructor_p=*/true,
3055 DEFAULT_INIT_PRIORITY, &locus);
3057 generate_ctor_or_dtor_function (/*constructor_p=*/false,
3058 DEFAULT_INIT_PRIORITY, &locus);
3061 /* We're done with the splay-tree now. */
3062 if (priority_info_map)
3063 splay_tree_delete (priority_info_map);
3065 /* We're done with static constructors, so we can go back to "C++"
3067 pop_lang_context ();
3069 cgraph_finalize_compilation_unit ();
3072 /* Now, issue warnings about static, but not defined, functions,
3073 etc., and emit debugging information. */
3074 walk_namespaces (wrapup_globals_for_namespace, /*data=*/&reconsider);
3075 if (pending_statics)
3076 check_global_declarations (&VARRAY_TREE (pending_statics, 0),
3077 pending_statics_used);
3081 /* The entire file is now complete. If requested, dump everything
3085 FILE *stream = dump_begin (TDI_tu, &flags);
3089 dump_node (global_namespace, flags & ~TDF_SLIM, stream);
3090 dump_end (TDI_tu, stream);
3094 timevar_pop (TV_VARCONST);
3096 if (flag_detailed_statistics)
3098 dump_tree_statistics ();
3099 dump_time_statistics ();
3101 input_location = locus;
3103 #ifdef ENABLE_CHECKING
3104 validate_conversion_obstack ();
3105 #endif /* ENABLE_CHECKING */
3108 /* FN is an OFFSET_REF, DOTSTAR_EXPR or MEMBER_REF indicating the
3109 function to call in parse-tree form; it has not yet been
3110 semantically analyzed. ARGS are the arguments to the function.
3111 They have already been semantically analyzed. */
3114 build_offset_ref_call_from_tree (tree fn, tree args)
3123 object = TREE_OPERAND (fn, 0);
3125 if (processing_template_decl)
3127 gcc_assert (TREE_CODE (fn) == DOTSTAR_EXPR
3128 || TREE_CODE (fn) == MEMBER_REF);
3129 if (type_dependent_expression_p (fn)
3130 || any_type_dependent_arguments_p (args))
3131 return build_min_nt (CALL_EXPR, fn, args, NULL_TREE);
3133 /* Transform the arguments and add the implicit "this"
3134 parameter. That must be done before the FN is transformed
3135 because we depend on the form of FN. */
3136 args = build_non_dependent_args (args);
3137 if (TREE_CODE (fn) == DOTSTAR_EXPR)
3138 object = build_unary_op (ADDR_EXPR, object, 0);
3139 object = build_non_dependent_expr (object);
3140 args = tree_cons (NULL_TREE, object, args);
3141 /* Now that the arguments are done, transform FN. */
3142 fn = build_non_dependent_expr (fn);
3145 /* A qualified name corresponding to a bound pointer-to-member is
3146 represented as an OFFSET_REF:
3148 struct B { void g(); };
3150 void B::g() { (this->*p)(); } */
3151 if (TREE_CODE (fn) == OFFSET_REF)
3153 tree object_addr = build_unary_op (ADDR_EXPR, object, 0);
3154 fn = TREE_OPERAND (fn, 1);
3155 fn = get_member_function_from_ptrfunc (&object_addr, fn);
3156 args = tree_cons (NULL_TREE, object_addr, args);
3159 expr = build_function_call (fn, args);
3160 if (processing_template_decl && expr != error_mark_node)
3161 return build_min_non_dep (CALL_EXPR, expr, orig_fn, orig_args, NULL_TREE);
3167 check_default_args (tree x)
3169 tree arg = TYPE_ARG_TYPES (TREE_TYPE (x));
3170 bool saw_def = false;
3171 int i = 0 - (TREE_CODE (TREE_TYPE (x)) == METHOD_TYPE);
3172 for (; arg && arg != void_list_node; arg = TREE_CHAIN (arg), ++i)
3174 if (TREE_PURPOSE (arg))
3178 cp_error_at ("default argument missing for parameter %P of %q+#D",
3186 mark_used (tree decl)
3188 TREE_USED (decl) = 1;
3189 if (processing_template_decl || skip_evaluation)
3192 if (TREE_CODE (decl) == FUNCTION_DECL && DECL_DECLARED_INLINE_P (decl)
3193 && !TREE_ASM_WRITTEN (decl))
3194 /* Remember it, so we can check it was defined. */
3196 if (DECL_DEFERRED_FN (decl))
3198 note_vague_linkage_fn (decl);
3201 assemble_external (decl);
3203 /* Is it a synthesized method that needs to be synthesized? */
3204 if (TREE_CODE (decl) == FUNCTION_DECL
3205 && DECL_NONSTATIC_MEMBER_FUNCTION_P (decl)
3206 && DECL_ARTIFICIAL (decl)
3207 && !DECL_THUNK_P (decl)
3208 && ! DECL_INITIAL (decl)
3209 /* Kludge: don't synthesize for default args. */
3210 && current_function_decl)
3212 synthesize_method (decl);
3213 /* If we've already synthesized the method we don't need to
3214 instantiate it, so we can return right away. */
3218 /* If this is a function or variable that is an instance of some
3219 template, we now know that we will need to actually do the
3220 instantiation. We check that DECL is not an explicit
3221 instantiation because that is not checked in instantiate_decl. */
3222 if ((DECL_NON_THUNK_FUNCTION_P (decl) || TREE_CODE (decl) == VAR_DECL)
3223 && DECL_LANG_SPECIFIC (decl) && DECL_TEMPLATE_INFO (decl)
3224 && (!DECL_EXPLICIT_INSTANTIATION (decl)
3225 || (TREE_CODE (decl) == FUNCTION_DECL
3226 && DECL_INLINE (DECL_TEMPLATE_RESULT
3227 (template_for_substitution (decl))))))
3228 /* We put off instantiating functions in order to improve compile
3229 times. Maintaining a stack of active functions is expensive,
3230 and the inliner knows to instantiate any functions it might
3232 instantiate_decl (decl, /*defer_ok=*/true, /*undefined_ok=*/0);
3235 #include "gt-cp-decl2.h"