1 /* Process declarations and variables for C++ compiler.
2 Copyright (C) 1988, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
3 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2007, 2008, 2009
4 Free Software Foundation, Inc.
5 Hacked by Michael Tiemann (tiemann@cygnus.com)
7 This file is part of GCC.
9 GCC is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3, or (at your option)
14 GCC is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with GCC; see the file COPYING3. If not see
21 <http://www.gnu.org/licenses/>. */
24 /* Process declarations and symbol lookup for C++ front end.
25 Also constructs types; the standard scalar types at initialization,
26 and structure, union, array and enum types when they are declared. */
28 /* ??? not all decl nodes are given the most useful possible
29 line numbers. For example, the CONST_DECLs for enum values. */
33 #include "coretypes.h"
48 #include "tree-mudflap.h"
50 #include "tree-inline.h"
52 #include "tree-dump.h"
56 extern cpp_reader *parse_in;
58 /* This structure contains information about the initializations
59 and/or destructions required for a particular priority level. */
60 typedef struct priority_info_s {
61 /* Nonzero if there have been any initializations at this priority
62 throughout the translation unit. */
63 int initializations_p;
64 /* Nonzero if there have been any destructions at this priority
65 throughout the translation unit. */
69 static void mark_vtable_entries (tree);
70 static bool maybe_emit_vtables (tree);
71 static bool acceptable_java_type (tree);
72 static tree start_objects (int, int);
73 static void finish_objects (int, int, tree);
74 static tree start_static_storage_duration_function (unsigned);
75 static void finish_static_storage_duration_function (tree);
76 static priority_info get_priority_info (int);
77 static void do_static_initialization_or_destruction (tree, bool);
78 static void one_static_initialization_or_destruction (tree, tree, bool);
79 static void generate_ctor_or_dtor_function (bool, int, location_t *);
80 static int generate_ctor_and_dtor_functions_for_priority (splay_tree_node,
82 static tree prune_vars_needing_no_initialization (tree *);
83 static void write_out_vars (tree);
84 static void import_export_class (tree);
85 static tree get_guard_bits (tree);
86 static void determine_visibility_from_class (tree, tree);
88 /* A list of static class variables. This is needed, because a
89 static class variable can be declared inside the class without
90 an initializer, and then initialized, statically, outside the class. */
91 static GTY(()) VEC(tree,gc) *pending_statics;
93 /* A list of functions which were declared inline, but which we
94 may need to emit outline anyway. */
95 static GTY(()) VEC(tree,gc) *deferred_fns;
97 /* Nonzero if we're done parsing and into end-of-file activities. */
103 /* Return a member function type (a METHOD_TYPE), given FNTYPE (a
104 FUNCTION_TYPE), CTYPE (class type), and QUALS (the cv-qualifiers
105 that apply to the function). */
108 build_memfn_type (tree fntype, tree ctype, cp_cv_quals quals)
113 if (fntype == error_mark_node || ctype == error_mark_node)
114 return error_mark_node;
116 type_quals = quals & ~TYPE_QUAL_RESTRICT;
117 ctype = cp_build_qualified_type (ctype, type_quals);
118 fntype = build_method_type_directly (ctype, TREE_TYPE (fntype),
119 (TREE_CODE (fntype) == METHOD_TYPE
120 ? TREE_CHAIN (TYPE_ARG_TYPES (fntype))
121 : TYPE_ARG_TYPES (fntype)));
122 raises = TYPE_RAISES_EXCEPTIONS (fntype);
124 fntype = build_exception_variant (fntype, raises);
129 /* Build a PARM_DECL with NAME and TYPE, and set DECL_ARG_TYPE
133 cp_build_parm_decl (tree name, tree type)
135 tree parm = build_decl (PARM_DECL, name, type);
136 /* DECL_ARG_TYPE is only used by the back end and the back end never
138 if (!processing_template_decl)
139 DECL_ARG_TYPE (parm) = type_passed_as (type);
141 /* If the type is a pack expansion, then we have a function
143 if (type && TREE_CODE (type) == TYPE_PACK_EXPANSION)
144 FUNCTION_PARAMETER_PACK_P (parm) = 1;
149 /* Returns a PARM_DECL for a parameter of the indicated TYPE, with the
153 build_artificial_parm (tree name, tree type)
155 tree parm = cp_build_parm_decl (name, type);
156 DECL_ARTIFICIAL (parm) = 1;
157 /* All our artificial parms are implicitly `const'; they cannot be
159 TREE_READONLY (parm) = 1;
163 /* Constructors for types with virtual baseclasses need an "in-charge" flag
164 saying whether this constructor is responsible for initialization of
165 virtual baseclasses or not. All destructors also need this "in-charge"
166 flag, which additionally determines whether or not the destructor should
167 free the memory for the object.
169 This function adds the "in-charge" flag to member function FN if
170 appropriate. It is called from grokclassfn and tsubst.
171 FN must be either a constructor or destructor.
173 The in-charge flag follows the 'this' parameter, and is followed by the
174 VTT parm (if any), then the user-written parms. */
177 maybe_retrofit_in_chrg (tree fn)
179 tree basetype, arg_types, parms, parm, fntype;
181 /* If we've already add the in-charge parameter don't do it again. */
182 if (DECL_HAS_IN_CHARGE_PARM_P (fn))
185 /* When processing templates we can't know, in general, whether or
186 not we're going to have virtual baseclasses. */
187 if (processing_template_decl)
190 /* We don't need an in-charge parameter for constructors that don't
191 have virtual bases. */
192 if (DECL_CONSTRUCTOR_P (fn)
193 && !CLASSTYPE_VBASECLASSES (DECL_CONTEXT (fn)))
196 arg_types = TYPE_ARG_TYPES (TREE_TYPE (fn));
197 basetype = TREE_TYPE (TREE_VALUE (arg_types));
198 arg_types = TREE_CHAIN (arg_types);
200 parms = TREE_CHAIN (DECL_ARGUMENTS (fn));
202 /* If this is a subobject constructor or destructor, our caller will
203 pass us a pointer to our VTT. */
204 if (CLASSTYPE_VBASECLASSES (DECL_CONTEXT (fn)))
206 parm = build_artificial_parm (vtt_parm_identifier, vtt_parm_type);
208 /* First add it to DECL_ARGUMENTS between 'this' and the real args... */
209 TREE_CHAIN (parm) = parms;
212 /* ...and then to TYPE_ARG_TYPES. */
213 arg_types = hash_tree_chain (vtt_parm_type, arg_types);
215 DECL_HAS_VTT_PARM_P (fn) = 1;
218 /* Then add the in-charge parm (before the VTT parm). */
219 parm = build_artificial_parm (in_charge_identifier, integer_type_node);
220 TREE_CHAIN (parm) = parms;
222 arg_types = hash_tree_chain (integer_type_node, arg_types);
224 /* Insert our new parameter(s) into the list. */
225 TREE_CHAIN (DECL_ARGUMENTS (fn)) = parms;
227 /* And rebuild the function type. */
228 fntype = build_method_type_directly (basetype, TREE_TYPE (TREE_TYPE (fn)),
230 if (TYPE_RAISES_EXCEPTIONS (TREE_TYPE (fn)))
231 fntype = build_exception_variant (fntype,
232 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (fn)));
233 TREE_TYPE (fn) = fntype;
235 /* Now we've got the in-charge parameter. */
236 DECL_HAS_IN_CHARGE_PARM_P (fn) = 1;
239 /* Classes overload their constituent function names automatically.
240 When a function name is declared in a record structure,
241 its name is changed to it overloaded name. Since names for
242 constructors and destructors can conflict, we place a leading
245 CNAME is the name of the class we are grokking for.
247 FUNCTION is a FUNCTION_DECL. It was created by `grokdeclarator'.
249 FLAGS contains bits saying what's special about today's
250 arguments. 1 == DESTRUCTOR. 2 == OPERATOR.
252 If FUNCTION is a destructor, then we must add the `auto-delete' field
253 as a second parameter. There is some hair associated with the fact
254 that we must "declare" this variable in the manner consistent with the
255 way the rest of the arguments were declared.
257 QUALS are the qualifiers for the this pointer. */
260 grokclassfn (tree ctype, tree function, enum overload_flags flags)
262 tree fn_name = DECL_NAME (function);
264 /* Even within an `extern "C"' block, members get C++ linkage. See
265 [dcl.link] for details. */
266 SET_DECL_LANGUAGE (function, lang_cplusplus);
268 if (fn_name == NULL_TREE)
270 error ("name missing for member function");
271 fn_name = get_identifier ("<anonymous>");
272 DECL_NAME (function) = fn_name;
275 DECL_CONTEXT (function) = ctype;
277 if (flags == DTOR_FLAG)
278 DECL_DESTRUCTOR_P (function) = 1;
280 if (flags == DTOR_FLAG || DECL_CONSTRUCTOR_P (function))
281 maybe_retrofit_in_chrg (function);
284 /* Create an ARRAY_REF, checking for the user doing things backwards
288 grok_array_decl (tree array_expr, tree index_exp)
292 tree orig_array_expr = array_expr;
293 tree orig_index_exp = index_exp;
295 if (error_operand_p (array_expr) || error_operand_p (index_exp))
296 return error_mark_node;
298 if (processing_template_decl)
300 if (type_dependent_expression_p (array_expr)
301 || type_dependent_expression_p (index_exp))
302 return build_min_nt (ARRAY_REF, array_expr, index_exp,
303 NULL_TREE, NULL_TREE);
304 array_expr = build_non_dependent_expr (array_expr);
305 index_exp = build_non_dependent_expr (index_exp);
308 type = TREE_TYPE (array_expr);
310 type = non_reference (type);
312 /* If they have an `operator[]', use that. */
313 if (MAYBE_CLASS_TYPE_P (type) || MAYBE_CLASS_TYPE_P (TREE_TYPE (index_exp)))
314 expr = build_new_op (ARRAY_REF, LOOKUP_NORMAL,
315 array_expr, index_exp, NULL_TREE,
316 /*overloaded_p=*/NULL, tf_warning_or_error);
321 /* Otherwise, create an ARRAY_REF for a pointer or array type.
322 It is a little-known fact that, if `a' is an array and `i' is
323 an int, you can write `i[a]', which means the same thing as
325 if (TREE_CODE (type) == ARRAY_TYPE)
328 p1 = build_expr_type_conversion (WANT_POINTER, array_expr, false);
330 if (TREE_CODE (TREE_TYPE (index_exp)) == ARRAY_TYPE)
333 p2 = build_expr_type_conversion (WANT_POINTER, index_exp, false);
335 i1 = build_expr_type_conversion (WANT_INT | WANT_ENUM, array_expr,
337 i2 = build_expr_type_conversion (WANT_INT | WANT_ENUM, index_exp,
340 if ((p1 && i2) && (i1 && p2))
341 error ("ambiguous conversion for array subscript");
344 array_expr = p1, index_exp = i2;
346 array_expr = p2, index_exp = i1;
349 error ("invalid types %<%T[%T]%> for array subscript",
350 type, TREE_TYPE (index_exp));
351 return error_mark_node;
354 if (array_expr == error_mark_node || index_exp == error_mark_node)
355 error ("ambiguous conversion for array subscript");
357 expr = build_array_ref (array_expr, index_exp, input_location);
359 if (processing_template_decl && expr != error_mark_node)
360 return build_min_non_dep (ARRAY_REF, expr, orig_array_expr, orig_index_exp,
361 NULL_TREE, NULL_TREE);
365 /* Given the cast expression EXP, checking out its validity. Either return
366 an error_mark_node if there was an unavoidable error, return a cast to
367 void for trying to delete a pointer w/ the value 0, or return the
368 call to delete. If DOING_VEC is true, we handle things differently
369 for doing an array delete.
370 Implements ARM $5.3.4. This is called from the parser. */
373 delete_sanity (tree exp, tree size, bool doing_vec, int use_global_delete)
377 if (exp == error_mark_node)
380 if (processing_template_decl)
382 t = build_min (DELETE_EXPR, void_type_node, exp, size);
383 DELETE_EXPR_USE_GLOBAL (t) = use_global_delete;
384 DELETE_EXPR_USE_VEC (t) = doing_vec;
385 TREE_SIDE_EFFECTS (t) = 1;
389 /* An array can't have been allocated by new, so complain. */
390 if (TREE_CODE (exp) == VAR_DECL
391 && TREE_CODE (TREE_TYPE (exp)) == ARRAY_TYPE)
392 warning (0, "deleting array %q#D", exp);
394 t = build_expr_type_conversion (WANT_POINTER, exp, true);
396 if (t == NULL_TREE || t == error_mark_node)
398 error ("type %q#T argument given to %<delete%>, expected pointer",
400 return error_mark_node;
403 type = TREE_TYPE (t);
405 /* As of Valley Forge, you can delete a pointer to const. */
407 /* You can't delete functions. */
408 if (TREE_CODE (TREE_TYPE (type)) == FUNCTION_TYPE)
410 error ("cannot delete a function. Only pointer-to-objects are "
411 "valid arguments to %<delete%>");
412 return error_mark_node;
415 /* Deleting ptr to void is undefined behavior [expr.delete/3]. */
416 if (TREE_CODE (TREE_TYPE (type)) == VOID_TYPE)
418 warning (0, "deleting %qT is undefined", type);
422 /* Deleting a pointer with the value zero is valid and has no effect. */
423 if (integer_zerop (t))
424 return build1 (NOP_EXPR, void_type_node, t);
427 return build_vec_delete (t, /*maxindex=*/NULL_TREE,
428 sfk_deleting_destructor,
431 return build_delete (type, t, sfk_deleting_destructor,
432 LOOKUP_NORMAL, use_global_delete);
435 /* Report an error if the indicated template declaration is not the
436 sort of thing that should be a member template. */
439 check_member_template (tree tmpl)
443 gcc_assert (TREE_CODE (tmpl) == TEMPLATE_DECL);
444 decl = DECL_TEMPLATE_RESULT (tmpl);
446 if (TREE_CODE (decl) == FUNCTION_DECL
447 || (TREE_CODE (decl) == TYPE_DECL
448 && MAYBE_CLASS_TYPE_P (TREE_TYPE (decl))))
450 /* The parser rejects template declarations in local classes. */
451 gcc_assert (!current_function_decl);
452 /* The parser rejects any use of virtual in a function template. */
453 gcc_assert (!(TREE_CODE (decl) == FUNCTION_DECL
454 && DECL_VIRTUAL_P (decl)));
456 /* The debug-information generating code doesn't know what to do
457 with member templates. */
458 DECL_IGNORED_P (tmpl) = 1;
461 error ("template declaration of %q#D", decl);
464 /* Return true iff TYPE is a valid Java parameter or return type. */
467 acceptable_java_type (tree type)
469 if (type == error_mark_node)
472 if (TREE_CODE (type) == VOID_TYPE || TYPE_FOR_JAVA (type))
474 if (TREE_CODE (type) == POINTER_TYPE || TREE_CODE (type) == REFERENCE_TYPE)
476 type = TREE_TYPE (type);
477 if (TREE_CODE (type) == RECORD_TYPE)
480 if (! TYPE_FOR_JAVA (type))
482 if (! CLASSTYPE_TEMPLATE_INFO (type))
484 args = CLASSTYPE_TI_ARGS (type);
485 i = TREE_VEC_LENGTH (args);
488 type = TREE_VEC_ELT (args, i);
489 if (TREE_CODE (type) == POINTER_TYPE)
490 type = TREE_TYPE (type);
491 if (! TYPE_FOR_JAVA (type))
500 /* For a METHOD in a Java class CTYPE, return true if
501 the parameter and return types are valid Java types.
502 Otherwise, print appropriate error messages, and return false. */
505 check_java_method (tree method)
508 tree arg_types = TYPE_ARG_TYPES (TREE_TYPE (method));
509 tree ret_type = TREE_TYPE (TREE_TYPE (method));
511 if (!acceptable_java_type (ret_type))
513 error ("Java method %qD has non-Java return type %qT",
518 arg_types = TREE_CHAIN (arg_types);
519 if (DECL_HAS_IN_CHARGE_PARM_P (method))
520 arg_types = TREE_CHAIN (arg_types);
521 if (DECL_HAS_VTT_PARM_P (method))
522 arg_types = TREE_CHAIN (arg_types);
524 for (; arg_types != NULL_TREE; arg_types = TREE_CHAIN (arg_types))
526 tree type = TREE_VALUE (arg_types);
527 if (!acceptable_java_type (type))
529 if (type != error_mark_node)
530 error ("Java method %qD has non-Java parameter type %qT",
538 /* Sanity check: report error if this function FUNCTION is not
539 really a member of the class (CTYPE) it is supposed to belong to.
540 TEMPLATE_PARMS is used to specify the template parameters of a member
541 template passed as FUNCTION_DECL. If the member template is passed as a
542 TEMPLATE_DECL, it can be NULL since the parameters can be extracted
543 from the declaration. If the function is not a function template, it
545 It returns the original declaration for the function, NULL_TREE if
546 no declaration was found, error_mark_node if an error was emitted. */
549 check_classfn (tree ctype, tree function, tree template_parms)
555 if (DECL_USE_TEMPLATE (function)
556 && !(TREE_CODE (function) == TEMPLATE_DECL
557 && DECL_TEMPLATE_SPECIALIZATION (function))
558 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (function)))
559 /* Since this is a specialization of a member template,
560 we're not going to find the declaration in the class.
563 struct S { template <typename T> void f(T); };
564 template <> void S::f(int);
566 we're not going to find `S::f(int)', but there's no
567 reason we should, either. We let our callers know we didn't
568 find the method, but we don't complain. */
571 /* Basic sanity check: for a template function, the template parameters
572 either were not passed, or they are the same of DECL_TEMPLATE_PARMS. */
573 if (TREE_CODE (function) == TEMPLATE_DECL)
576 && !comp_template_parms (template_parms,
577 DECL_TEMPLATE_PARMS (function)))
579 error ("template parameter lists provided don't match the "
580 "template parameters of %qD", function);
581 return error_mark_node;
583 template_parms = DECL_TEMPLATE_PARMS (function);
586 /* OK, is this a definition of a member template? */
587 is_template = (template_parms != NULL_TREE);
589 /* We must enter the scope here, because conversion operators are
590 named by target type, and type equivalence relies on typenames
591 resolving within the scope of CTYPE. */
592 pushed_scope = push_scope (ctype);
593 ix = class_method_index_for_fn (complete_type (ctype), function);
596 VEC(tree,gc) *methods = CLASSTYPE_METHOD_VEC (ctype);
597 tree fndecls, fndecl = 0;
599 const char *format = NULL;
601 for (fndecls = VEC_index (tree, methods, ix);
602 fndecls; fndecls = OVL_NEXT (fndecls))
606 fndecl = OVL_CURRENT (fndecls);
607 p1 = TYPE_ARG_TYPES (TREE_TYPE (function));
608 p2 = TYPE_ARG_TYPES (TREE_TYPE (fndecl));
610 /* We cannot simply call decls_match because this doesn't
611 work for static member functions that are pretending to
612 be methods, and because the name may have been changed by
615 /* Get rid of the this parameter on functions that become
617 if (DECL_STATIC_FUNCTION_P (fndecl)
618 && TREE_CODE (TREE_TYPE (function)) == METHOD_TYPE)
619 p1 = TREE_CHAIN (p1);
621 /* A member template definition only matches a member template
623 if (is_template != (TREE_CODE (fndecl) == TEMPLATE_DECL))
626 if (same_type_p (TREE_TYPE (TREE_TYPE (function)),
627 TREE_TYPE (TREE_TYPE (fndecl)))
628 && compparms (p1, p2)
630 || comp_template_parms (template_parms,
631 DECL_TEMPLATE_PARMS (fndecl)))
632 && (DECL_TEMPLATE_SPECIALIZATION (function)
633 == DECL_TEMPLATE_SPECIALIZATION (fndecl))
634 && (!DECL_TEMPLATE_SPECIALIZATION (function)
635 || (DECL_TI_TEMPLATE (function)
636 == DECL_TI_TEMPLATE (fndecl))))
642 pop_scope (pushed_scope);
643 return OVL_CURRENT (fndecls);
646 error_at (DECL_SOURCE_LOCATION (function),
647 "prototype for %q#D does not match any in class %qT",
649 is_conv_op = DECL_CONV_FN_P (fndecl);
652 ix = CLASSTYPE_FIRST_CONVERSION_SLOT;
653 fndecls = VEC_index (tree, methods, ix);
656 fndecl = OVL_CURRENT (fndecls);
657 fndecls = OVL_NEXT (fndecls);
659 if (!fndecls && is_conv_op)
661 if (VEC_length (tree, methods) > (size_t) ++ix)
663 fndecls = VEC_index (tree, methods, ix);
664 if (!DECL_CONV_FN_P (OVL_CURRENT (fndecls)))
676 format = N_("candidates are: %+#D");
678 format = N_("candidate is: %+#D");
679 error (format, fndecl);
682 else if (!COMPLETE_TYPE_P (ctype))
683 cxx_incomplete_type_error (function, ctype);
685 error ("no %q#D member function declared in class %qT",
689 pop_scope (pushed_scope);
690 return error_mark_node;
693 /* DECL is a function with vague linkage. Remember it so that at the
694 end of the translation unit we can decide whether or not to emit
698 note_vague_linkage_fn (tree decl)
700 if (!DECL_DEFERRED_FN (decl))
702 DECL_DEFERRED_FN (decl) = 1;
703 DECL_DEFER_OUTPUT (decl) = 1;
704 VEC_safe_push (tree, gc, deferred_fns, decl);
708 /* We have just processed the DECL, which is a static data member.
709 The other parameters are as for cp_finish_decl. */
712 finish_static_data_member_decl (tree decl,
713 tree init, bool init_const_expr_p,
717 DECL_CONTEXT (decl) = current_class_type;
719 /* We cannot call pushdecl here, because that would fill in the
720 TREE_CHAIN of our decl. Instead, we modify cp_finish_decl to do
721 the right thing, namely, to put this decl out straight away. */
723 if (! processing_template_decl)
724 VEC_safe_push (tree, gc, pending_statics, decl);
726 if (LOCAL_CLASS_P (current_class_type))
727 permerror (input_location, "local class %q#T shall not have static data member %q#D",
728 current_class_type, decl);
730 /* Static consts need not be initialized in the class definition. */
731 if (init != NULL_TREE && TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl)))
733 static int explained = 0;
735 error ("initializer invalid for static member with constructor");
738 error ("(an out of class initialization is required)");
743 /* Force the compiler to know when an uninitialized static const
744 member is being used. */
745 if (CP_TYPE_CONST_P (TREE_TYPE (decl)) && init == 0)
746 TREE_USED (decl) = 1;
747 DECL_INITIAL (decl) = init;
748 DECL_IN_AGGR_P (decl) = 1;
750 cp_finish_decl (decl, init, init_const_expr_p, asmspec_tree, flags);
753 /* DECLARATOR and DECLSPECS correspond to a class member. The other
754 parameters are as for cp_finish_decl. Return the DECL for the
755 class member declared. */
758 grokfield (const cp_declarator *declarator,
759 cp_decl_specifier_seq *declspecs,
760 tree init, bool init_const_expr_p,
765 const char *asmspec = 0;
766 int flags = LOOKUP_ONLYCONVERTING;
769 && TREE_CODE (init) == TREE_LIST
770 && TREE_VALUE (init) == error_mark_node
771 && TREE_CHAIN (init) == NULL_TREE)
774 value = grokdeclarator (declarator, declspecs, FIELD, init != 0, &attrlist);
775 if (! value || error_operand_p (value))
776 /* friend or constructor went bad. */
777 return error_mark_node;
779 if (TREE_CODE (value) == TYPE_DECL && init)
781 error ("typedef %qD is initialized (use __typeof__ instead)", value);
785 /* Pass friendly classes back. */
786 if (value == void_type_node)
789 /* Pass friend decls back. */
790 if ((TREE_CODE (value) == FUNCTION_DECL
791 || TREE_CODE (value) == TEMPLATE_DECL)
792 && DECL_CONTEXT (value) != current_class_type)
795 if (DECL_NAME (value) != NULL_TREE
796 && IDENTIFIER_POINTER (DECL_NAME (value))[0] == '_'
797 && ! strcmp (IDENTIFIER_POINTER (DECL_NAME (value)), "_vptr"))
798 error ("member %qD conflicts with virtual function table field name",
801 /* Stash away type declarations. */
802 if (TREE_CODE (value) == TYPE_DECL)
804 DECL_NONLOCAL (value) = 1;
805 DECL_CONTEXT (value) = current_class_type;
807 if (processing_template_decl)
808 value = push_template_decl (value);
814 /* If this is a typedef that names the class for linkage purposes
815 (7.1.3p8), apply any attributes directly to the type. */
816 if (TAGGED_TYPE_P (TREE_TYPE (value))
817 && value == TYPE_NAME (TYPE_MAIN_VARIANT (TREE_TYPE (value))))
818 attrflags = ATTR_FLAG_TYPE_IN_PLACE;
820 cplus_decl_attributes (&value, attrlist, attrflags);
826 if (DECL_IN_AGGR_P (value))
828 error ("%qD is already defined in %qT", value, DECL_CONTEXT (value));
829 return void_type_node;
832 if (asmspec_tree && asmspec_tree != error_mark_node)
833 asmspec = TREE_STRING_POINTER (asmspec_tree);
837 if (TREE_CODE (value) == FUNCTION_DECL)
839 /* Initializers for functions are rejected early in the parser.
840 If we get here, it must be a pure specifier for a method. */
841 if (init == ridpointers[(int)RID_DELETE])
843 DECL_DELETED_FN (value) = 1;
844 DECL_DECLARED_INLINE_P (value) = 1;
845 DECL_INITIAL (value) = error_mark_node;
847 else if (init == ridpointers[(int)RID_DEFAULT])
849 if (!defaultable_fn_p (value))
850 error ("%qD cannot be defaulted", value);
853 DECL_DEFAULTED_FN (value) = 1;
854 DECL_INITIALIZED_IN_CLASS_P (value) = 1;
855 DECL_DECLARED_INLINE_P (value) = 1;
858 else if (TREE_CODE (TREE_TYPE (value)) == METHOD_TYPE)
860 gcc_assert (error_operand_p (init) || integer_zerop (init));
861 DECL_PURE_VIRTUAL_P (value) = 1;
865 gcc_assert (TREE_CODE (TREE_TYPE (value)) == FUNCTION_TYPE);
866 error ("initializer specified for static member function %qD",
870 else if (pedantic && TREE_CODE (value) != VAR_DECL)
871 /* Already complained in grokdeclarator. */
873 else if (!processing_template_decl)
875 if (TREE_CODE (init) == CONSTRUCTOR)
876 init = digest_init (TREE_TYPE (value), init);
878 init = integral_constant_value (init);
880 if (init != error_mark_node && !TREE_CONSTANT (init))
882 /* We can allow references to things that are effectively
883 static, since references are initialized with the
885 if (TREE_CODE (TREE_TYPE (value)) != REFERENCE_TYPE
886 || (TREE_STATIC (init) == 0
887 && (!DECL_P (init) || DECL_EXTERNAL (init) == 0)))
889 error ("field initializer is not constant");
890 init = error_mark_node;
896 if (processing_template_decl
897 && (TREE_CODE (value) == VAR_DECL || TREE_CODE (value) == FUNCTION_DECL))
899 value = push_template_decl (value);
900 if (error_operand_p (value))
901 return error_mark_node;
905 cplus_decl_attributes (&value, attrlist, 0);
907 switch (TREE_CODE (value))
910 finish_static_data_member_decl (value, init, init_const_expr_p,
911 asmspec_tree, flags);
916 error ("%<asm%> specifiers are not permitted on non-static data members");
917 if (DECL_INITIAL (value) == error_mark_node)
918 init = error_mark_node;
919 cp_finish_decl (value, init, /*init_const_expr_p=*/false,
921 DECL_INITIAL (value) = init;
922 DECL_IN_AGGR_P (value) = 1;
927 set_user_assembler_name (value, asmspec);
929 cp_finish_decl (value,
931 /*init_const_expr_p=*/false,
932 asmspec_tree, flags);
934 /* Pass friends back this way. */
935 if (DECL_FRIEND_P (value))
936 return void_type_node;
938 DECL_IN_AGGR_P (value) = 1;
947 /* Like `grokfield', but for bitfields.
948 WIDTH is non-NULL for bit fields only, and is an INTEGER_CST node. */
951 grokbitfield (const cp_declarator *declarator,
952 cp_decl_specifier_seq *declspecs, tree width,
955 tree value = grokdeclarator (declarator, declspecs, BITFIELD, 0, &attrlist);
957 if (value == error_mark_node)
958 return NULL_TREE; /* friends went bad. */
960 /* Pass friendly classes back. */
961 if (TREE_CODE (value) == VOID_TYPE)
962 return void_type_node;
964 if (!INTEGRAL_TYPE_P (TREE_TYPE (value))
965 && (POINTER_TYPE_P (value)
966 || !dependent_type_p (TREE_TYPE (value))))
968 error ("bit-field %qD with non-integral type", value);
969 return error_mark_node;
972 if (TREE_CODE (value) == TYPE_DECL)
974 error ("cannot declare %qD to be a bit-field type", value);
978 /* Usually, finish_struct_1 catches bitfields with invalid types.
979 But, in the case of bitfields with function type, we confuse
980 ourselves into thinking they are member functions, so we must
982 if (TREE_CODE (value) == FUNCTION_DECL)
984 error ("cannot declare bit-field %qD with function type",
989 if (DECL_IN_AGGR_P (value))
991 error ("%qD is already defined in the class %qT", value,
992 DECL_CONTEXT (value));
993 return void_type_node;
996 if (TREE_STATIC (value))
998 error ("static member %qD cannot be a bit-field", value);
1001 finish_decl (value, NULL_TREE, NULL_TREE);
1003 if (width != error_mark_node)
1005 constant_expression_warning (width);
1006 DECL_INITIAL (value) = width;
1007 SET_DECL_C_BIT_FIELD (value);
1010 DECL_IN_AGGR_P (value) = 1;
1013 cplus_decl_attributes (&value, attrlist, /*flags=*/0);
1019 /* Returns true iff ATTR is an attribute which needs to be applied at
1020 instantiation time rather than template definition time. */
1023 is_late_template_attribute (tree attr, tree decl)
1025 tree name = TREE_PURPOSE (attr);
1026 tree args = TREE_VALUE (attr);
1027 const struct attribute_spec *spec = lookup_attribute_spec (name);
1031 /* Unknown attribute. */
1034 /* Attribute weak handling wants to write out assembly right away. */
1035 if (is_attribute_p ("weak", name))
1038 /* If any of the arguments are dependent expressions, we can't evaluate
1039 the attribute until instantiation time. */
1040 for (arg = args; arg; arg = TREE_CHAIN (arg))
1042 tree t = TREE_VALUE (arg);
1044 /* If the first attribute argument is an identifier, only consider
1045 second and following arguments. Attributes like mode, format,
1046 cleanup and several target specific attributes aren't late
1047 just because they have an IDENTIFIER_NODE as first argument. */
1048 if (arg == args && TREE_CODE (t) == IDENTIFIER_NODE)
1051 if (value_dependent_expression_p (t)
1052 || type_dependent_expression_p (t))
1056 if (TREE_CODE (decl) == TYPE_DECL
1058 || spec->type_required)
1060 tree type = TYPE_P (decl) ? decl : TREE_TYPE (decl);
1062 /* We can't apply any attributes to a completely unknown type until
1063 instantiation time. */
1064 enum tree_code code = TREE_CODE (type);
1065 if (code == TEMPLATE_TYPE_PARM
1066 || code == BOUND_TEMPLATE_TEMPLATE_PARM
1067 || code == TYPENAME_TYPE)
1069 /* Also defer most attributes on dependent types. This is not
1070 necessary in all cases, but is the better default. */
1071 else if (dependent_type_p (type)
1072 /* But attribute visibility specifically works on
1074 && !is_attribute_p ("visibility", name))
1083 /* ATTR_P is a list of attributes. Remove any attributes which need to be
1084 applied at instantiation time and return them. If IS_DEPENDENT is true,
1085 the declaration itself is dependent, so all attributes should be applied
1086 at instantiation time. */
1089 splice_template_attributes (tree *attr_p, tree decl)
1092 tree late_attrs = NULL_TREE;
1093 tree *q = &late_attrs;
1100 if (is_late_template_attribute (*p, decl))
1102 ATTR_IS_DEPENDENT (*p) = 1;
1104 *p = TREE_CHAIN (*p);
1105 q = &TREE_CHAIN (*q);
1109 p = &TREE_CHAIN (*p);
1115 /* Remove any late attributes from the list in ATTR_P and attach them to
1119 save_template_attributes (tree *attr_p, tree *decl_p)
1121 tree late_attrs = splice_template_attributes (attr_p, *decl_p);
1123 tree old_attrs = NULL_TREE;
1128 /* Give this type a name so we know to look it up again at instantiation
1130 if (TREE_CODE (*decl_p) == TYPE_DECL
1131 && DECL_ORIGINAL_TYPE (*decl_p) == NULL_TREE)
1133 tree oldt = TREE_TYPE (*decl_p);
1134 tree newt = build_variant_type_copy (oldt);
1135 DECL_ORIGINAL_TYPE (*decl_p) = oldt;
1136 TREE_TYPE (*decl_p) = newt;
1137 TYPE_NAME (newt) = *decl_p;
1138 TREE_USED (newt) = TREE_USED (*decl_p);
1141 if (DECL_P (*decl_p))
1142 q = &DECL_ATTRIBUTES (*decl_p);
1144 q = &TYPE_ATTRIBUTES (*decl_p);
1148 /* Place the late attributes at the beginning of the attribute
1150 TREE_CHAIN (tree_last (late_attrs)) = *q;
1153 if (!DECL_P (*decl_p) && *decl_p == TYPE_MAIN_VARIANT (*decl_p))
1155 /* We've added new attributes directly to the main variant, so
1156 now we need to update all of the other variants to include
1157 these new attributes. */
1159 for (variant = TYPE_NEXT_VARIANT (*decl_p); variant;
1160 variant = TYPE_NEXT_VARIANT (variant))
1162 gcc_assert (TYPE_ATTRIBUTES (variant) == old_attrs);
1163 TYPE_ATTRIBUTES (variant) = TYPE_ATTRIBUTES (*decl_p);
1168 /* Like reconstruct_complex_type, but handle also template trees. */
1171 cp_reconstruct_complex_type (tree type, tree bottom)
1175 if (TREE_CODE (type) == POINTER_TYPE)
1177 inner = cp_reconstruct_complex_type (TREE_TYPE (type), bottom);
1178 outer = build_pointer_type_for_mode (inner, TYPE_MODE (type),
1179 TYPE_REF_CAN_ALIAS_ALL (type));
1181 else if (TREE_CODE (type) == REFERENCE_TYPE)
1183 inner = cp_reconstruct_complex_type (TREE_TYPE (type), bottom);
1184 outer = build_reference_type_for_mode (inner, TYPE_MODE (type),
1185 TYPE_REF_CAN_ALIAS_ALL (type));
1187 else if (TREE_CODE (type) == ARRAY_TYPE)
1189 inner = cp_reconstruct_complex_type (TREE_TYPE (type), bottom);
1190 outer = build_cplus_array_type (inner, TYPE_DOMAIN (type));
1191 /* Don't call cp_build_qualified_type on ARRAY_TYPEs, the
1192 element type qualification will be handled by the recursive
1193 cp_reconstruct_complex_type call and cp_build_qualified_type
1194 for ARRAY_TYPEs changes the element type. */
1197 else if (TREE_CODE (type) == FUNCTION_TYPE)
1199 inner = cp_reconstruct_complex_type (TREE_TYPE (type), bottom);
1200 outer = build_function_type (inner, TYPE_ARG_TYPES (type));
1202 else if (TREE_CODE (type) == METHOD_TYPE)
1204 inner = cp_reconstruct_complex_type (TREE_TYPE (type), bottom);
1205 /* The build_method_type_directly() routine prepends 'this' to argument list,
1206 so we must compensate by getting rid of it. */
1208 = build_method_type_directly
1209 (TREE_TYPE (TREE_VALUE (TYPE_ARG_TYPES (type))),
1211 TREE_CHAIN (TYPE_ARG_TYPES (type)));
1213 else if (TREE_CODE (type) == OFFSET_TYPE)
1215 inner = cp_reconstruct_complex_type (TREE_TYPE (type), bottom);
1216 outer = build_offset_type (TYPE_OFFSET_BASETYPE (type), inner);
1221 return cp_build_qualified_type (outer, TYPE_QUALS (type));
1224 /* Like decl_attributes, but handle C++ complexity. */
1227 cplus_decl_attributes (tree *decl, tree attributes, int flags)
1229 if (*decl == NULL_TREE || *decl == void_type_node
1230 || *decl == error_mark_node
1231 || attributes == NULL_TREE)
1234 if (processing_template_decl)
1236 if (check_for_bare_parameter_packs (attributes))
1239 save_template_attributes (&attributes, decl);
1240 if (attributes == NULL_TREE)
1244 if (TREE_CODE (*decl) == TEMPLATE_DECL)
1245 decl = &DECL_TEMPLATE_RESULT (*decl);
1247 decl_attributes (decl, attributes, flags);
1249 if (TREE_CODE (*decl) == TYPE_DECL)
1250 SET_IDENTIFIER_TYPE_VALUE (DECL_NAME (*decl), TREE_TYPE (*decl));
1253 /* Walks through the namespace- or function-scope anonymous union
1254 OBJECT, with the indicated TYPE, building appropriate VAR_DECLs.
1255 Returns one of the fields for use in the mangled name. */
1258 build_anon_union_vars (tree type, tree object)
1260 tree main_decl = NULL_TREE;
1263 /* Rather than write the code to handle the non-union case,
1264 just give an error. */
1265 if (TREE_CODE (type) != UNION_TYPE)
1266 error ("anonymous struct not inside named type");
1268 for (field = TYPE_FIELDS (type);
1270 field = TREE_CHAIN (field))
1275 if (DECL_ARTIFICIAL (field))
1277 if (TREE_CODE (field) != FIELD_DECL)
1279 permerror (input_location, "%q+#D invalid; an anonymous union can only "
1280 "have non-static data members", field);
1284 if (TREE_PRIVATE (field))
1285 permerror (input_location, "private member %q+#D in anonymous union", field);
1286 else if (TREE_PROTECTED (field))
1287 permerror (input_location, "protected member %q+#D in anonymous union", field);
1289 if (processing_template_decl)
1290 ref = build_min_nt (COMPONENT_REF, object,
1291 DECL_NAME (field), NULL_TREE);
1293 ref = build_class_member_access_expr (object, field, NULL_TREE,
1294 false, tf_warning_or_error);
1296 if (DECL_NAME (field))
1300 decl = build_decl (VAR_DECL, DECL_NAME (field), TREE_TYPE (field));
1301 DECL_ANON_UNION_VAR_P (decl) = 1;
1303 base = get_base_address (object);
1304 TREE_PUBLIC (decl) = TREE_PUBLIC (base);
1305 TREE_STATIC (decl) = TREE_STATIC (base);
1306 DECL_EXTERNAL (decl) = DECL_EXTERNAL (base);
1308 SET_DECL_VALUE_EXPR (decl, ref);
1309 DECL_HAS_VALUE_EXPR_P (decl) = 1;
1311 decl = pushdecl (decl);
1313 else if (ANON_AGGR_TYPE_P (TREE_TYPE (field)))
1314 decl = build_anon_union_vars (TREE_TYPE (field), ref);
1318 if (main_decl == NULL_TREE)
1325 /* Finish off the processing of a UNION_TYPE structure. If the union is an
1326 anonymous union, then all members must be laid out together. PUBLIC_P
1327 is nonzero if this union is not declared static. */
1330 finish_anon_union (tree anon_union_decl)
1336 if (anon_union_decl == error_mark_node)
1339 type = TREE_TYPE (anon_union_decl);
1340 public_p = TREE_PUBLIC (anon_union_decl);
1342 /* The VAR_DECL's context is the same as the TYPE's context. */
1343 DECL_CONTEXT (anon_union_decl) = DECL_CONTEXT (TYPE_NAME (type));
1345 if (TYPE_FIELDS (type) == NULL_TREE)
1350 error ("namespace-scope anonymous aggregates must be static");
1354 main_decl = build_anon_union_vars (type, anon_union_decl);
1355 if (main_decl == error_mark_node)
1357 if (main_decl == NULL_TREE)
1359 warning (0, "anonymous union with no members");
1363 if (!processing_template_decl)
1365 /* Use main_decl to set the mangled name. */
1366 DECL_NAME (anon_union_decl) = DECL_NAME (main_decl);
1367 maybe_commonize_var (anon_union_decl);
1368 mangle_decl (anon_union_decl);
1369 DECL_NAME (anon_union_decl) = NULL_TREE;
1372 pushdecl (anon_union_decl);
1373 if (building_stmt_tree ()
1374 && at_function_scope_p ())
1375 add_decl_expr (anon_union_decl);
1376 else if (!processing_template_decl)
1377 rest_of_decl_compilation (anon_union_decl,
1378 toplevel_bindings_p (), at_eof);
1381 /* Auxiliary functions to make type signatures for
1382 `operator new' and `operator delete' correspond to
1383 what compiler will be expecting. */
1386 coerce_new_type (tree type)
1389 tree args = TYPE_ARG_TYPES (type);
1391 gcc_assert (TREE_CODE (type) == FUNCTION_TYPE);
1393 if (!same_type_p (TREE_TYPE (type), ptr_type_node))
1396 error ("%<operator new%> must return type %qT", ptr_type_node);
1399 if (args && args != void_list_node)
1401 if (TREE_PURPOSE (args))
1403 /* [basic.stc.dynamic.allocation]
1405 The first parameter shall not have an associated default
1407 error ("the first parameter of %<operator new%> cannot "
1408 "have a default argument");
1409 /* Throw away the default argument. */
1410 TREE_PURPOSE (args) = NULL_TREE;
1413 if (!same_type_p (TREE_VALUE (args), size_type_node))
1416 args = TREE_CHAIN (args);
1423 permerror (input_location, "%<operator new%> takes type %<size_t%> (%qT) "
1424 "as first parameter", size_type_node);
1429 args = tree_cons (NULL_TREE, size_type_node, args);
1432 type = build_exception_variant
1433 (build_function_type (ptr_type_node, args),
1434 TYPE_RAISES_EXCEPTIONS (type));
1442 coerce_delete_type (tree type)
1445 tree args = TYPE_ARG_TYPES (type);
1447 gcc_assert (TREE_CODE (type) == FUNCTION_TYPE);
1449 if (!same_type_p (TREE_TYPE (type), void_type_node))
1452 error ("%<operator delete%> must return type %qT", void_type_node);
1455 if (!args || args == void_list_node
1456 || !same_type_p (TREE_VALUE (args), ptr_type_node))
1459 if (args && args != void_list_node)
1460 args = TREE_CHAIN (args);
1461 error ("%<operator delete%> takes type %qT as first parameter",
1467 args = tree_cons (NULL_TREE, ptr_type_node, args);
1470 type = build_exception_variant
1471 (build_function_type (void_type_node, args),
1472 TYPE_RAISES_EXCEPTIONS (type));
1480 /* DECL is a VAR_DECL for a vtable: walk through the entries in the vtable
1481 and mark them as needed. */
1484 mark_vtable_entries (tree decl)
1487 unsigned HOST_WIDE_INT idx;
1489 FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (DECL_INITIAL (decl)),
1494 STRIP_NOPS (fnaddr);
1496 if (TREE_CODE (fnaddr) != ADDR_EXPR
1497 && TREE_CODE (fnaddr) != FDESC_EXPR)
1498 /* This entry is an offset: a virtual base class offset, a
1499 virtual call offset, an RTTI offset, etc. */
1502 fn = TREE_OPERAND (fnaddr, 0);
1503 TREE_ADDRESSABLE (fn) = 1;
1504 /* When we don't have vcall offsets, we output thunks whenever
1505 we output the vtables that contain them. With vcall offsets,
1506 we know all the thunks we'll need when we emit a virtual
1507 function, so we emit the thunks there instead. */
1508 if (DECL_THUNK_P (fn))
1509 use_thunk (fn, /*emit_p=*/0);
1514 /* Set DECL up to have the closest approximation of "initialized common"
1515 linkage available. */
1518 comdat_linkage (tree decl)
1521 make_decl_one_only (decl);
1522 else if (TREE_CODE (decl) == FUNCTION_DECL
1523 || (TREE_CODE (decl) == VAR_DECL && DECL_ARTIFICIAL (decl)))
1524 /* We can just emit function and compiler-generated variables
1525 statically; having multiple copies is (for the most part) only
1528 There are two correctness issues, however: the address of a
1529 template instantiation with external linkage should be the
1530 same, independent of what translation unit asks for the
1531 address, and this will not hold when we emit multiple copies of
1532 the function. However, there's little else we can do.
1534 Also, by default, the typeinfo implementation assumes that
1535 there will be only one copy of the string used as the name for
1536 each type. Therefore, if weak symbols are unavailable, the
1537 run-time library should perform a more conservative check; it
1538 should perform a string comparison, rather than an address
1540 TREE_PUBLIC (decl) = 0;
1543 /* Static data member template instantiations, however, cannot
1544 have multiple copies. */
1545 if (DECL_INITIAL (decl) == 0
1546 || DECL_INITIAL (decl) == error_mark_node)
1547 DECL_COMMON (decl) = 1;
1548 else if (EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl)))
1550 DECL_COMMON (decl) = 1;
1551 DECL_INITIAL (decl) = error_mark_node;
1553 else if (!DECL_EXPLICIT_INSTANTIATION (decl))
1555 /* We can't do anything useful; leave vars for explicit
1557 DECL_EXTERNAL (decl) = 1;
1558 DECL_NOT_REALLY_EXTERN (decl) = 0;
1562 if (DECL_LANG_SPECIFIC (decl))
1563 DECL_COMDAT (decl) = 1;
1566 /* For win32 we also want to put explicit instantiations in
1567 linkonce sections, so that they will be merged with implicit
1568 instantiations; otherwise we get duplicate symbol errors.
1569 For Darwin we do not want explicit instantiations to be
1573 maybe_make_one_only (tree decl)
1575 /* We used to say that this was not necessary on targets that support weak
1576 symbols, because the implicit instantiations will defer to the explicit
1577 one. However, that's not actually the case in SVR4; a strong definition
1578 after a weak one is an error. Also, not making explicit
1579 instantiations one_only means that we can end up with two copies of
1580 some template instantiations. */
1584 /* We can't set DECL_COMDAT on functions, or cp_finish_file will think
1585 we can get away with not emitting them if they aren't used. We need
1586 to for variables so that cp_finish_decl will update their linkage,
1587 because their DECL_INITIAL may not have been set properly yet. */
1589 if (!TARGET_WEAK_NOT_IN_ARCHIVE_TOC
1590 || (! DECL_EXPLICIT_INSTANTIATION (decl)
1591 && ! DECL_TEMPLATE_SPECIALIZATION (decl)))
1593 make_decl_one_only (decl);
1595 if (TREE_CODE (decl) == VAR_DECL)
1597 DECL_COMDAT (decl) = 1;
1598 /* Mark it needed so we don't forget to emit it. */
1599 mark_decl_referenced (decl);
1604 /* Determine whether or not we want to specifically import or export CTYPE,
1605 using various heuristics. */
1608 import_export_class (tree ctype)
1610 /* -1 for imported, 1 for exported. */
1611 int import_export = 0;
1613 /* It only makes sense to call this function at EOF. The reason is
1614 that this function looks at whether or not the first non-inline
1615 non-abstract virtual member function has been defined in this
1616 translation unit. But, we can't possibly know that until we've
1617 seen the entire translation unit. */
1618 gcc_assert (at_eof);
1620 if (CLASSTYPE_INTERFACE_KNOWN (ctype))
1623 /* If MULTIPLE_SYMBOL_SPACES is set and we saw a #pragma interface,
1624 we will have CLASSTYPE_INTERFACE_ONLY set but not
1625 CLASSTYPE_INTERFACE_KNOWN. In that case, we don't want to use this
1626 heuristic because someone will supply a #pragma implementation
1627 elsewhere, and deducing it here would produce a conflict. */
1628 if (CLASSTYPE_INTERFACE_ONLY (ctype))
1631 if (lookup_attribute ("dllimport", TYPE_ATTRIBUTES (ctype)))
1633 else if (lookup_attribute ("dllexport", TYPE_ATTRIBUTES (ctype)))
1635 else if (CLASSTYPE_IMPLICIT_INSTANTIATION (ctype)
1636 && !flag_implicit_templates)
1637 /* For a template class, without -fimplicit-templates, check the
1638 repository. If the virtual table is assigned to this
1639 translation unit, then export the class; otherwise, import
1641 import_export = repo_export_class_p (ctype) ? 1 : -1;
1642 else if (TYPE_POLYMORPHIC_P (ctype))
1644 /* The ABI specifies that the virtual table and associated
1645 information are emitted with the key method, if any. */
1646 tree method = CLASSTYPE_KEY_METHOD (ctype);
1647 /* If weak symbol support is not available, then we must be
1648 careful not to emit the vtable when the key function is
1649 inline. An inline function can be defined in multiple
1650 translation units. If we were to emit the vtable in each
1651 translation unit containing a definition, we would get
1652 multiple definition errors at link-time. */
1653 if (method && (flag_weak || ! DECL_DECLARED_INLINE_P (method)))
1654 import_export = (DECL_REALLY_EXTERN (method) ? -1 : 1);
1657 /* When MULTIPLE_SYMBOL_SPACES is set, we cannot count on seeing
1658 a definition anywhere else. */
1659 if (MULTIPLE_SYMBOL_SPACES && import_export == -1)
1662 /* Allow back ends the chance to overrule the decision. */
1663 if (targetm.cxx.import_export_class)
1664 import_export = targetm.cxx.import_export_class (ctype, import_export);
1668 SET_CLASSTYPE_INTERFACE_KNOWN (ctype);
1669 CLASSTYPE_INTERFACE_ONLY (ctype) = (import_export < 0);
1673 /* Return true if VAR has already been provided to the back end; in that
1674 case VAR should not be modified further by the front end. */
1676 var_finalized_p (tree var)
1678 return varpool_node (var)->finalized;
1681 /* DECL is a VAR_DECL or FUNCTION_DECL which, for whatever reason,
1682 must be emitted in this translation unit. Mark it as such. */
1685 mark_needed (tree decl)
1687 /* It's possible that we no longer need to set
1688 TREE_SYMBOL_REFERENCED here directly, but doing so is
1690 TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl)) = 1;
1691 mark_decl_referenced (decl);
1694 /* DECL is either a FUNCTION_DECL or a VAR_DECL. This function
1695 returns true if a definition of this entity should be provided in
1696 this object file. Callers use this function to determine whether
1697 or not to let the back end know that a definition of DECL is
1698 available in this translation unit. */
1701 decl_needed_p (tree decl)
1703 gcc_assert (TREE_CODE (decl) == VAR_DECL
1704 || TREE_CODE (decl) == FUNCTION_DECL);
1705 /* This function should only be called at the end of the translation
1706 unit. We cannot be sure of whether or not something will be
1707 COMDAT until that point. */
1708 gcc_assert (at_eof);
1710 /* All entities with external linkage that are not COMDAT should be
1711 emitted; they may be referred to from other object files. */
1712 if (TREE_PUBLIC (decl) && !DECL_COMDAT (decl))
1714 /* If this entity was used, let the back end see it; it will decide
1715 whether or not to emit it into the object file. */
1716 if (TREE_USED (decl)
1717 || (DECL_ASSEMBLER_NAME_SET_P (decl)
1718 && TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl))))
1720 /* Otherwise, DECL does not need to be emitted -- yet. A subsequent
1721 reference to DECL might cause it to be emitted later. */
1725 /* If necessary, write out the vtables for the dynamic class CTYPE.
1726 Returns true if any vtables were emitted. */
1729 maybe_emit_vtables (tree ctype)
1735 /* If the vtables for this class have already been emitted there is
1736 nothing more to do. */
1737 primary_vtbl = CLASSTYPE_VTABLES (ctype);
1738 if (var_finalized_p (primary_vtbl))
1740 /* Ignore dummy vtables made by get_vtable_decl. */
1741 if (TREE_TYPE (primary_vtbl) == void_type_node)
1744 /* On some targets, we cannot determine the key method until the end
1745 of the translation unit -- which is when this function is
1747 if (!targetm.cxx.key_method_may_be_inline ())
1748 determine_key_method (ctype);
1750 /* See if any of the vtables are needed. */
1751 for (vtbl = CLASSTYPE_VTABLES (ctype); vtbl; vtbl = TREE_CHAIN (vtbl))
1753 import_export_decl (vtbl);
1754 if (DECL_NOT_REALLY_EXTERN (vtbl) && decl_needed_p (vtbl))
1759 /* If the references to this class' vtables are optimized away,
1760 still emit the appropriate debugging information. See
1762 if (DECL_COMDAT (primary_vtbl)
1763 && CLASSTYPE_DEBUG_REQUESTED (ctype))
1764 note_debug_info_needed (ctype);
1768 /* The ABI requires that we emit all of the vtables if we emit any
1770 for (vtbl = CLASSTYPE_VTABLES (ctype); vtbl; vtbl = TREE_CHAIN (vtbl))
1772 /* Mark entities references from the virtual table as used. */
1773 mark_vtable_entries (vtbl);
1775 if (TREE_TYPE (DECL_INITIAL (vtbl)) == 0)
1777 tree expr = store_init_value (vtbl, DECL_INITIAL (vtbl));
1779 /* It had better be all done at compile-time. */
1784 DECL_EXTERNAL (vtbl) = 0;
1785 rest_of_decl_compilation (vtbl, 1, 1);
1787 /* Because we're only doing syntax-checking, we'll never end up
1788 actually marking the variable as written. */
1789 if (flag_syntax_only)
1790 TREE_ASM_WRITTEN (vtbl) = 1;
1793 /* Since we're writing out the vtable here, also write the debug
1795 note_debug_info_needed (ctype);
1800 /* A special return value from type_visibility meaning internal
1803 enum { VISIBILITY_ANON = VISIBILITY_INTERNAL+1 };
1805 /* walk_tree helper function for type_visibility. */
1808 min_vis_r (tree *tp, int *walk_subtrees, void *data)
1810 int *vis_p = (int *)data;
1815 else if (CLASS_TYPE_P (*tp))
1817 if (!TREE_PUBLIC (TYPE_MAIN_DECL (*tp)))
1819 *vis_p = VISIBILITY_ANON;
1822 else if (CLASSTYPE_VISIBILITY (*tp) > *vis_p)
1823 *vis_p = CLASSTYPE_VISIBILITY (*tp);
1828 /* Returns the visibility of TYPE, which is the minimum visibility of its
1832 type_visibility (tree type)
1834 int vis = VISIBILITY_DEFAULT;
1835 cp_walk_tree_without_duplicates (&type, min_vis_r, &vis);
1839 /* Limit the visibility of DECL to VISIBILITY, if not explicitly
1840 specified (or if VISIBILITY is static). */
1843 constrain_visibility (tree decl, int visibility)
1845 if (visibility == VISIBILITY_ANON)
1847 /* extern "C" declarations aren't affected by the anonymous
1849 if (!DECL_EXTERN_C_P (decl))
1851 TREE_PUBLIC (decl) = 0;
1852 DECL_ONE_ONLY (decl) = 0;
1853 DECL_INTERFACE_KNOWN (decl) = 1;
1854 if (DECL_LANG_SPECIFIC (decl))
1855 DECL_NOT_REALLY_EXTERN (decl) = 1;
1858 else if (visibility > DECL_VISIBILITY (decl)
1859 && !DECL_VISIBILITY_SPECIFIED (decl))
1861 DECL_VISIBILITY (decl) = visibility;
1867 /* Constrain the visibility of DECL based on the visibility of its template
1871 constrain_visibility_for_template (tree decl, tree targs)
1873 /* If this is a template instantiation, check the innermost
1874 template args for visibility constraints. The outer template
1875 args are covered by the class check. */
1876 tree args = INNERMOST_TEMPLATE_ARGS (targs);
1878 for (i = TREE_VEC_LENGTH (args); i > 0; --i)
1882 tree arg = TREE_VEC_ELT (args, i-1);
1884 vis = type_visibility (arg);
1885 else if (TREE_TYPE (arg) && POINTER_TYPE_P (TREE_TYPE (arg)))
1888 if (TREE_CODE (arg) == ADDR_EXPR)
1889 arg = TREE_OPERAND (arg, 0);
1890 if (TREE_CODE (arg) == VAR_DECL
1891 || TREE_CODE (arg) == FUNCTION_DECL)
1893 if (! TREE_PUBLIC (arg))
1894 vis = VISIBILITY_ANON;
1896 vis = DECL_VISIBILITY (arg);
1900 constrain_visibility (decl, vis);
1904 /* Like c_determine_visibility, but with additional C++-specific
1907 Function-scope entities can rely on the function's visibility because
1908 it is set in start_preparsed_function.
1910 Class-scope entities cannot rely on the class's visibility until the end
1911 of the enclosing class definition.
1913 Note that because namespaces have multiple independent definitions,
1914 namespace visibility is handled elsewhere using the #pragma visibility
1915 machinery rather than by decorating the namespace declaration.
1917 The goal is for constraints from the type to give a diagnostic, and
1918 other constraints to be applied silently. */
1921 determine_visibility (tree decl)
1923 tree class_type = NULL_TREE;
1925 bool orig_visibility_specified;
1926 enum symbol_visibility orig_visibility;
1928 /* Remember that all decls get VISIBILITY_DEFAULT when built. */
1930 /* Only relevant for names with external linkage. */
1931 if (!TREE_PUBLIC (decl))
1934 /* Cloned constructors and destructors get the same visibility as
1935 the underlying function. That should be set up in
1936 maybe_clone_body. */
1937 gcc_assert (!DECL_CLONED_FUNCTION_P (decl));
1939 orig_visibility_specified = DECL_VISIBILITY_SPECIFIED (decl);
1940 orig_visibility = DECL_VISIBILITY (decl);
1942 if (TREE_CODE (decl) == TYPE_DECL)
1944 if (CLASS_TYPE_P (TREE_TYPE (decl)))
1945 use_template = CLASSTYPE_USE_TEMPLATE (TREE_TYPE (decl));
1946 else if (TYPE_TEMPLATE_INFO (TREE_TYPE (decl)))
1951 else if (DECL_LANG_SPECIFIC (decl))
1952 use_template = DECL_USE_TEMPLATE (decl);
1956 /* If DECL is a member of a class, visibility specifiers on the
1957 class can influence the visibility of the DECL. */
1958 if (DECL_CLASS_SCOPE_P (decl))
1959 class_type = DECL_CONTEXT (decl);
1962 /* Not a class member. */
1964 /* Virtual tables have DECL_CONTEXT set to their associated class,
1965 so they are automatically handled above. */
1966 gcc_assert (TREE_CODE (decl) != VAR_DECL
1967 || !DECL_VTABLE_OR_VTT_P (decl));
1969 if (DECL_FUNCTION_SCOPE_P (decl) && ! DECL_VISIBILITY_SPECIFIED (decl))
1971 /* Local statics and classes get the visibility of their
1972 containing function by default, except that
1973 -fvisibility-inlines-hidden doesn't affect them. */
1974 tree fn = DECL_CONTEXT (decl);
1975 if (DECL_VISIBILITY_SPECIFIED (fn) || ! DECL_CLASS_SCOPE_P (fn))
1977 DECL_VISIBILITY (decl) = DECL_VISIBILITY (fn);
1978 DECL_VISIBILITY_SPECIFIED (decl) =
1979 DECL_VISIBILITY_SPECIFIED (fn);
1982 determine_visibility_from_class (decl, DECL_CONTEXT (fn));
1984 /* Local classes in templates have CLASSTYPE_USE_TEMPLATE set,
1985 but have no TEMPLATE_INFO, so don't try to check it. */
1988 else if (TREE_CODE (decl) == VAR_DECL && DECL_TINFO_P (decl)
1989 && flag_visibility_ms_compat)
1991 /* Under -fvisibility-ms-compat, types are visible by default,
1992 even though their contents aren't. */
1993 tree underlying_type = TREE_TYPE (DECL_NAME (decl));
1994 int underlying_vis = type_visibility (underlying_type);
1995 if (underlying_vis == VISIBILITY_ANON
1996 || CLASSTYPE_VISIBILITY_SPECIFIED (underlying_type))
1997 constrain_visibility (decl, underlying_vis);
1999 DECL_VISIBILITY (decl) = VISIBILITY_DEFAULT;
2001 else if (TREE_CODE (decl) == VAR_DECL && DECL_TINFO_P (decl))
2003 /* tinfo visibility is based on the type it's for. */
2004 constrain_visibility
2005 (decl, type_visibility (TREE_TYPE (DECL_NAME (decl))));
2007 /* Give the target a chance to override the visibility associated
2009 if (TREE_PUBLIC (decl)
2010 && !DECL_REALLY_EXTERN (decl)
2011 && CLASS_TYPE_P (TREE_TYPE (DECL_NAME (decl)))
2012 && !CLASSTYPE_VISIBILITY_SPECIFIED (TREE_TYPE (DECL_NAME (decl))))
2013 targetm.cxx.determine_class_data_visibility (decl);
2015 else if (use_template)
2016 /* Template instantiations and specializations get visibility based
2017 on their template unless they override it with an attribute. */;
2018 else if (! DECL_VISIBILITY_SPECIFIED (decl))
2020 /* Set default visibility to whatever the user supplied with
2021 #pragma GCC visibility or a namespace visibility attribute. */
2022 DECL_VISIBILITY (decl) = default_visibility;
2023 DECL_VISIBILITY_SPECIFIED (decl) = visibility_options.inpragma;
2029 /* If the specialization doesn't specify visibility, use the
2030 visibility from the template. */
2031 tree tinfo = (TREE_CODE (decl) == TYPE_DECL
2032 ? TYPE_TEMPLATE_INFO (TREE_TYPE (decl))
2033 : DECL_TEMPLATE_INFO (decl));
2034 tree args = TI_ARGS (tinfo);
2036 if (args != error_mark_node)
2038 int depth = TMPL_ARGS_DEPTH (args);
2039 tree pattern = DECL_TEMPLATE_RESULT (TI_TEMPLATE (tinfo));
2041 if (!DECL_VISIBILITY_SPECIFIED (decl))
2043 DECL_VISIBILITY (decl) = DECL_VISIBILITY (pattern);
2044 DECL_VISIBILITY_SPECIFIED (decl)
2045 = DECL_VISIBILITY_SPECIFIED (pattern);
2048 /* FIXME should TMPL_ARGS_DEPTH really return 1 for null input? */
2049 if (args && depth > template_class_depth (class_type))
2050 /* Limit visibility based on its template arguments. */
2051 constrain_visibility_for_template (decl, args);
2056 determine_visibility_from_class (decl, class_type);
2058 if (decl_anon_ns_mem_p (decl))
2059 /* Names in an anonymous namespace get internal linkage.
2060 This might change once we implement export. */
2061 constrain_visibility (decl, VISIBILITY_ANON);
2062 else if (TREE_CODE (decl) != TYPE_DECL)
2064 /* Propagate anonymity from type to decl. */
2065 int tvis = type_visibility (TREE_TYPE (decl));
2066 if (tvis == VISIBILITY_ANON
2067 || ! DECL_VISIBILITY_SPECIFIED (decl))
2068 constrain_visibility (decl, tvis);
2071 /* If visibility changed and DECL already has DECL_RTL, ensure
2072 symbol flags are updated. */
2073 if ((DECL_VISIBILITY (decl) != orig_visibility
2074 || DECL_VISIBILITY_SPECIFIED (decl) != orig_visibility_specified)
2075 && ((TREE_CODE (decl) == VAR_DECL && TREE_STATIC (decl))
2076 || TREE_CODE (decl) == FUNCTION_DECL)
2077 && DECL_RTL_SET_P (decl))
2078 make_decl_rtl (decl);
2081 /* By default, static data members and function members receive
2082 the visibility of their containing class. */
2085 determine_visibility_from_class (tree decl, tree class_type)
2087 if (DECL_VISIBILITY_SPECIFIED (decl))
2090 if (visibility_options.inlines_hidden
2091 /* Don't do this for inline templates; specializations might not be
2092 inline, and we don't want them to inherit the hidden
2093 visibility. We'll set it here for all inline instantiations. */
2094 && !processing_template_decl
2095 && TREE_CODE (decl) == FUNCTION_DECL
2096 && DECL_DECLARED_INLINE_P (decl)
2097 && (! DECL_LANG_SPECIFIC (decl)
2098 || ! DECL_EXPLICIT_INSTANTIATION (decl)))
2099 DECL_VISIBILITY (decl) = VISIBILITY_HIDDEN;
2102 /* Default to the class visibility. */
2103 DECL_VISIBILITY (decl) = CLASSTYPE_VISIBILITY (class_type);
2104 DECL_VISIBILITY_SPECIFIED (decl)
2105 = CLASSTYPE_VISIBILITY_SPECIFIED (class_type);
2108 /* Give the target a chance to override the visibility associated
2110 if (TREE_CODE (decl) == VAR_DECL
2111 && (DECL_TINFO_P (decl)
2112 || (DECL_VTABLE_OR_VTT_P (decl)
2113 /* Construction virtual tables are not exported because
2114 they cannot be referred to from other object files;
2115 their name is not standardized by the ABI. */
2116 && !DECL_CONSTRUCTION_VTABLE_P (decl)))
2117 && TREE_PUBLIC (decl)
2118 && !DECL_REALLY_EXTERN (decl)
2119 && !CLASSTYPE_VISIBILITY_SPECIFIED (class_type))
2120 targetm.cxx.determine_class_data_visibility (decl);
2123 /* Constrain the visibility of a class TYPE based on the visibility of its
2124 field types. Warn if any fields require lesser visibility. */
2127 constrain_class_visibility (tree type)
2133 int vis = type_visibility (type);
2135 if (vis == VISIBILITY_ANON
2136 || DECL_IN_SYSTEM_HEADER (TYPE_MAIN_DECL (type)))
2139 /* Don't warn about visibility if the class has explicit visibility. */
2140 if (CLASSTYPE_VISIBILITY_SPECIFIED (type))
2141 vis = VISIBILITY_INTERNAL;
2143 for (t = TYPE_FIELDS (type); t; t = TREE_CHAIN (t))
2144 if (TREE_CODE (t) == FIELD_DECL && TREE_TYPE (t) != error_mark_node)
2146 tree ftype = strip_pointer_or_array_types (TREE_TYPE (t));
2147 int subvis = type_visibility (ftype);
2149 if (subvis == VISIBILITY_ANON)
2151 if (!in_main_input_context ())
2153 %qT has a field %qD whose type uses the anonymous namespace",
2156 else if (MAYBE_CLASS_TYPE_P (ftype)
2157 && vis < VISIBILITY_HIDDEN
2158 && subvis >= VISIBILITY_HIDDEN)
2159 warning (OPT_Wattributes, "\
2160 %qT declared with greater visibility than the type of its field %qD",
2164 binfo = TYPE_BINFO (type);
2165 for (i = 0; BINFO_BASE_ITERATE (binfo, i, t); ++i)
2167 int subvis = type_visibility (TREE_TYPE (t));
2169 if (subvis == VISIBILITY_ANON)
2171 if (!in_main_input_context())
2173 %qT has a base %qT whose type uses the anonymous namespace",
2174 type, TREE_TYPE (t));
2176 else if (vis < VISIBILITY_HIDDEN
2177 && subvis >= VISIBILITY_HIDDEN)
2178 warning (OPT_Wattributes, "\
2179 %qT declared with greater visibility than its base %qT",
2180 type, TREE_TYPE (t));
2184 /* DECL is a FUNCTION_DECL or VAR_DECL. If the object file linkage
2185 for DECL has not already been determined, do so now by setting
2186 DECL_EXTERNAL, DECL_COMDAT and other related flags. Until this
2187 function is called entities with vague linkage whose definitions
2188 are available must have TREE_PUBLIC set.
2190 If this function decides to place DECL in COMDAT, it will set
2191 appropriate flags -- but will not clear DECL_EXTERNAL. It is up to
2192 the caller to decide whether or not to clear DECL_EXTERNAL. Some
2193 callers defer that decision until it is clear that DECL is actually
2197 import_export_decl (tree decl)
2202 tree class_type = NULL_TREE;
2204 if (DECL_INTERFACE_KNOWN (decl))
2207 /* We cannot determine what linkage to give to an entity with vague
2208 linkage until the end of the file. For example, a virtual table
2209 for a class will be defined if and only if the key method is
2210 defined in this translation unit. As a further example, consider
2211 that when compiling a translation unit that uses PCH file with
2212 "-frepo" it would be incorrect to make decisions about what
2213 entities to emit when building the PCH; those decisions must be
2214 delayed until the repository information has been processed. */
2215 gcc_assert (at_eof);
2216 /* Object file linkage for explicit instantiations is handled in
2217 mark_decl_instantiated. For static variables in functions with
2218 vague linkage, maybe_commonize_var is used.
2220 Therefore, the only declarations that should be provided to this
2221 function are those with external linkage that are:
2223 * implicit instantiations of function templates
2227 * implicit instantiations of static data members of class
2234 Furthermore, all entities that reach this point must have a
2235 definition available in this translation unit.
2237 The following assertions check these conditions. */
2238 gcc_assert (TREE_CODE (decl) == FUNCTION_DECL
2239 || TREE_CODE (decl) == VAR_DECL);
2240 /* Any code that creates entities with TREE_PUBLIC cleared should
2241 also set DECL_INTERFACE_KNOWN. */
2242 gcc_assert (TREE_PUBLIC (decl));
2243 if (TREE_CODE (decl) == FUNCTION_DECL)
2244 gcc_assert (DECL_IMPLICIT_INSTANTIATION (decl)
2245 || DECL_FRIEND_PSEUDO_TEMPLATE_INSTANTIATION (decl)
2246 || DECL_DECLARED_INLINE_P (decl));
2248 gcc_assert (DECL_IMPLICIT_INSTANTIATION (decl)
2249 || DECL_VTABLE_OR_VTT_P (decl)
2250 || DECL_TINFO_P (decl));
2251 /* Check that a definition of DECL is available in this translation
2253 gcc_assert (!DECL_REALLY_EXTERN (decl));
2255 /* Assume that DECL will not have COMDAT linkage. */
2257 /* Assume that DECL will not be imported into this translation
2261 /* See if the repository tells us whether or not to emit DECL in
2262 this translation unit. */
2263 emit_p = repo_emit_p (decl);
2266 else if (emit_p == 1)
2268 /* The repository indicates that this entity should be defined
2269 here. Make sure the back end honors that request. */
2270 if (TREE_CODE (decl) == VAR_DECL)
2272 else if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl)
2273 || DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P (decl))
2276 FOR_EACH_CLONE (clone, decl)
2277 mark_needed (clone);
2281 /* Output the definition as an ordinary strong definition. */
2282 DECL_EXTERNAL (decl) = 0;
2283 DECL_INTERFACE_KNOWN (decl) = 1;
2288 /* We have already decided what to do with this DECL; there is no
2289 need to check anything further. */
2291 else if (TREE_CODE (decl) == VAR_DECL && DECL_VTABLE_OR_VTT_P (decl))
2293 class_type = DECL_CONTEXT (decl);
2294 import_export_class (class_type);
2295 if (TYPE_FOR_JAVA (class_type))
2297 else if (CLASSTYPE_INTERFACE_KNOWN (class_type)
2298 && CLASSTYPE_INTERFACE_ONLY (class_type))
2300 else if ((!flag_weak || TARGET_WEAK_NOT_IN_ARCHIVE_TOC)
2301 && !CLASSTYPE_USE_TEMPLATE (class_type)
2302 && CLASSTYPE_KEY_METHOD (class_type)
2303 && !DECL_DECLARED_INLINE_P (CLASSTYPE_KEY_METHOD (class_type)))
2304 /* The ABI requires that all virtual tables be emitted with
2305 COMDAT linkage. However, on systems where COMDAT symbols
2306 don't show up in the table of contents for a static
2307 archive, or on systems without weak symbols (where we
2308 approximate COMDAT linkage by using internal linkage), the
2309 linker will report errors about undefined symbols because
2310 it will not see the virtual table definition. Therefore,
2311 in the case that we know that the virtual table will be
2312 emitted in only one translation unit, we make the virtual
2313 table an ordinary definition with external linkage. */
2314 DECL_EXTERNAL (decl) = 0;
2315 else if (CLASSTYPE_INTERFACE_KNOWN (class_type))
2317 /* CLASS_TYPE is being exported from this translation unit,
2318 so DECL should be defined here. */
2319 if (!flag_weak && CLASSTYPE_EXPLICIT_INSTANTIATION (class_type))
2320 /* If a class is declared in a header with the "extern
2321 template" extension, then it will not be instantiated,
2322 even in translation units that would normally require
2323 it. Often such classes are explicitly instantiated in
2324 one translation unit. Therefore, the explicit
2325 instantiation must be made visible to other translation
2327 DECL_EXTERNAL (decl) = 0;
2330 /* The generic C++ ABI says that class data is always
2331 COMDAT, even if there is a key function. Some
2332 variants (e.g., the ARM EABI) says that class data
2333 only has COMDAT linkage if the class data might be
2334 emitted in more than one translation unit. When the
2335 key method can be inline and is inline, we still have
2336 to arrange for comdat even though
2337 class_data_always_comdat is false. */
2338 if (!CLASSTYPE_KEY_METHOD (class_type)
2339 || DECL_DECLARED_INLINE_P (CLASSTYPE_KEY_METHOD (class_type))
2340 || targetm.cxx.class_data_always_comdat ())
2342 /* The ABI requires COMDAT linkage. Normally, we
2343 only emit COMDAT things when they are needed;
2344 make sure that we realize that this entity is
2351 else if (!flag_implicit_templates
2352 && CLASSTYPE_IMPLICIT_INSTANTIATION (class_type))
2357 else if (TREE_CODE (decl) == VAR_DECL && DECL_TINFO_P (decl))
2359 tree type = TREE_TYPE (DECL_NAME (decl));
2360 if (CLASS_TYPE_P (type))
2363 import_export_class (type);
2364 if (CLASSTYPE_INTERFACE_KNOWN (type)
2365 && TYPE_POLYMORPHIC_P (type)
2366 && CLASSTYPE_INTERFACE_ONLY (type)
2367 /* If -fno-rtti was specified, then we cannot be sure
2368 that RTTI information will be emitted with the
2369 virtual table of the class, so we must emit it
2370 wherever it is used. */
2375 if (CLASSTYPE_INTERFACE_KNOWN (type)
2376 && !CLASSTYPE_INTERFACE_ONLY (type))
2378 comdat_p = (targetm.cxx.class_data_always_comdat ()
2379 || (CLASSTYPE_KEY_METHOD (type)
2380 && DECL_DECLARED_INLINE_P (CLASSTYPE_KEY_METHOD (type))));
2385 DECL_EXTERNAL (decl) = 0;
2395 else if (DECL_TEMPLATE_INSTANTIATION (decl)
2396 || DECL_FRIEND_PSEUDO_TEMPLATE_INSTANTIATION (decl))
2398 /* DECL is an implicit instantiation of a function or static
2400 if ((flag_implicit_templates
2401 && !flag_use_repository)
2402 || (flag_implicit_inline_templates
2403 && TREE_CODE (decl) == FUNCTION_DECL
2404 && DECL_DECLARED_INLINE_P (decl)))
2407 /* If we are not implicitly generating templates, then mark
2408 this entity as undefined in this translation unit. */
2411 else if (DECL_FUNCTION_MEMBER_P (decl))
2413 if (!DECL_DECLARED_INLINE_P (decl))
2415 tree ctype = DECL_CONTEXT (decl);
2416 import_export_class (ctype);
2417 if (CLASSTYPE_INTERFACE_KNOWN (ctype))
2419 DECL_NOT_REALLY_EXTERN (decl)
2420 = ! (CLASSTYPE_INTERFACE_ONLY (ctype)
2421 || (DECL_DECLARED_INLINE_P (decl)
2422 && ! flag_implement_inlines
2423 && !DECL_VINDEX (decl)));
2425 if (!DECL_NOT_REALLY_EXTERN (decl))
2426 DECL_EXTERNAL (decl) = 1;
2428 /* Always make artificials weak. */
2429 if (DECL_ARTIFICIAL (decl) && flag_weak)
2432 maybe_make_one_only (decl);
2443 /* If we are importing DECL into this translation unit, mark is
2444 an undefined here. */
2445 DECL_EXTERNAL (decl) = 1;
2446 DECL_NOT_REALLY_EXTERN (decl) = 0;
2450 /* If we decided to put DECL in COMDAT, mark it accordingly at
2452 comdat_linkage (decl);
2455 DECL_INTERFACE_KNOWN (decl) = 1;
2458 /* Return an expression that performs the destruction of DECL, which
2459 must be a VAR_DECL whose type has a non-trivial destructor, or is
2460 an array whose (innermost) elements have a non-trivial destructor. */
2463 build_cleanup (tree decl)
2466 tree type = TREE_TYPE (decl);
2468 /* This function should only be called for declarations that really
2469 require cleanups. */
2470 gcc_assert (!TYPE_HAS_TRIVIAL_DESTRUCTOR (type));
2472 /* Treat all objects with destructors as used; the destructor may do
2473 something substantive. */
2476 if (TREE_CODE (type) == ARRAY_TYPE)
2479 temp = build_address (decl);
2480 temp = build_delete (TREE_TYPE (temp), temp,
2481 sfk_complete_destructor,
2482 LOOKUP_NORMAL|LOOKUP_NONVIRTUAL|LOOKUP_DESTRUCTOR, 0);
2486 /* Returns the initialization guard variable for the variable DECL,
2487 which has static storage duration. */
2490 get_guard (tree decl)
2495 sname = mangle_guard_variable (decl);
2496 guard = IDENTIFIER_GLOBAL_VALUE (sname);
2501 /* We use a type that is big enough to contain a mutex as well
2502 as an integer counter. */
2503 guard_type = targetm.cxx.guard_type ();
2504 guard = build_decl (VAR_DECL, sname, guard_type);
2506 /* The guard should have the same linkage as what it guards. */
2507 TREE_PUBLIC (guard) = TREE_PUBLIC (decl);
2508 TREE_STATIC (guard) = TREE_STATIC (decl);
2509 DECL_COMMON (guard) = DECL_COMMON (decl);
2510 DECL_ONE_ONLY (guard) = DECL_ONE_ONLY (decl);
2511 if (TREE_PUBLIC (decl))
2512 DECL_WEAK (guard) = DECL_WEAK (decl);
2513 DECL_VISIBILITY (guard) = DECL_VISIBILITY (decl);
2514 DECL_VISIBILITY_SPECIFIED (guard) = DECL_VISIBILITY_SPECIFIED (decl);
2516 DECL_ARTIFICIAL (guard) = 1;
2517 DECL_IGNORED_P (guard) = 1;
2518 TREE_USED (guard) = 1;
2519 pushdecl_top_level_and_finish (guard, NULL_TREE);
2524 /* Return those bits of the GUARD variable that should be set when the
2525 guarded entity is actually initialized. */
2528 get_guard_bits (tree guard)
2530 if (!targetm.cxx.guard_mask_bit ())
2532 /* We only set the first byte of the guard, in order to leave room
2533 for a mutex in the high-order bits. */
2534 guard = build1 (ADDR_EXPR,
2535 build_pointer_type (TREE_TYPE (guard)),
2537 guard = build1 (NOP_EXPR,
2538 build_pointer_type (char_type_node),
2540 guard = build1 (INDIRECT_REF, char_type_node, guard);
2546 /* Return an expression which determines whether or not the GUARD
2547 variable has already been initialized. */
2550 get_guard_cond (tree guard)
2554 /* Check to see if the GUARD is zero. */
2555 guard = get_guard_bits (guard);
2557 /* Mask off all but the low bit. */
2558 if (targetm.cxx.guard_mask_bit ())
2560 guard_value = integer_one_node;
2561 if (!same_type_p (TREE_TYPE (guard_value), TREE_TYPE (guard)))
2562 guard_value = convert (TREE_TYPE (guard), guard_value);
2563 guard = cp_build_binary_op (input_location,
2564 BIT_AND_EXPR, guard, guard_value,
2565 tf_warning_or_error);
2568 guard_value = integer_zero_node;
2569 if (!same_type_p (TREE_TYPE (guard_value), TREE_TYPE (guard)))
2570 guard_value = convert (TREE_TYPE (guard), guard_value);
2571 return cp_build_binary_op (input_location,
2572 EQ_EXPR, guard, guard_value,
2573 tf_warning_or_error);
2576 /* Return an expression which sets the GUARD variable, indicating that
2577 the variable being guarded has been initialized. */
2580 set_guard (tree guard)
2584 /* Set the GUARD to one. */
2585 guard = get_guard_bits (guard);
2586 guard_init = integer_one_node;
2587 if (!same_type_p (TREE_TYPE (guard_init), TREE_TYPE (guard)))
2588 guard_init = convert (TREE_TYPE (guard), guard_init);
2589 return cp_build_modify_expr (guard, NOP_EXPR, guard_init,
2590 tf_warning_or_error);
2593 /* Start the process of running a particular set of global constructors
2594 or destructors. Subroutine of do_[cd]tors. */
2597 start_objects (int method_type, int initp)
2603 /* Make ctor or dtor function. METHOD_TYPE may be 'I' or 'D'. */
2605 if (initp != DEFAULT_INIT_PRIORITY)
2615 sprintf (type, "%c%c%.5u", method_type, joiner, initp);
2618 sprintf (type, "%c", method_type);
2620 fndecl = build_lang_decl (FUNCTION_DECL,
2621 get_file_function_name (type),
2622 build_function_type (void_type_node,
2624 start_preparsed_function (fndecl, /*attrs=*/NULL_TREE, SF_PRE_PARSED);
2626 TREE_PUBLIC (current_function_decl) = 0;
2628 /* Mark as artificial because it's not explicitly in the user's
2630 DECL_ARTIFICIAL (current_function_decl) = 1;
2632 /* Mark this declaration as used to avoid spurious warnings. */
2633 TREE_USED (current_function_decl) = 1;
2635 /* Mark this function as a global constructor or destructor. */
2636 if (method_type == 'I')
2637 DECL_GLOBAL_CTOR_P (current_function_decl) = 1;
2639 DECL_GLOBAL_DTOR_P (current_function_decl) = 1;
2640 DECL_LANG_SPECIFIC (current_function_decl)->decl_flags.u2sel = 1;
2642 body = begin_compound_stmt (BCS_FN_BODY);
2647 /* Finish the process of running a particular set of global constructors
2648 or destructors. Subroutine of do_[cd]tors. */
2651 finish_objects (int method_type, int initp, tree body)
2656 finish_compound_stmt (body);
2657 fn = finish_function (0);
2659 if (method_type == 'I')
2661 DECL_STATIC_CONSTRUCTOR (fn) = 1;
2662 decl_init_priority_insert (fn, initp);
2666 DECL_STATIC_DESTRUCTOR (fn) = 1;
2667 decl_fini_priority_insert (fn, initp);
2670 expand_or_defer_fn (fn);
2673 /* The names of the parameters to the function created to handle
2674 initializations and destructions for objects with static storage
2676 #define INITIALIZE_P_IDENTIFIER "__initialize_p"
2677 #define PRIORITY_IDENTIFIER "__priority"
2679 /* The name of the function we create to handle initializations and
2680 destructions for objects with static storage duration. */
2681 #define SSDF_IDENTIFIER "__static_initialization_and_destruction"
2683 /* The declaration for the __INITIALIZE_P argument. */
2684 static GTY(()) tree initialize_p_decl;
2686 /* The declaration for the __PRIORITY argument. */
2687 static GTY(()) tree priority_decl;
2689 /* The declaration for the static storage duration function. */
2690 static GTY(()) tree ssdf_decl;
2692 /* All the static storage duration functions created in this
2693 translation unit. */
2694 static GTY(()) VEC(tree,gc) *ssdf_decls;
2696 /* A map from priority levels to information about that priority
2697 level. There may be many such levels, so efficient lookup is
2699 static splay_tree priority_info_map;
2701 /* Begins the generation of the function that will handle all
2702 initialization and destruction of objects with static storage
2703 duration. The function generated takes two parameters of type
2704 `int': __INITIALIZE_P and __PRIORITY. If __INITIALIZE_P is
2705 nonzero, it performs initializations. Otherwise, it performs
2706 destructions. It only performs those initializations or
2707 destructions with the indicated __PRIORITY. The generated function
2710 It is assumed that this function will only be called once per
2711 translation unit. */
2714 start_static_storage_duration_function (unsigned count)
2719 char id[sizeof (SSDF_IDENTIFIER) + 1 /* '\0' */ + 32];
2721 /* Create the identifier for this function. It will be of the form
2722 SSDF_IDENTIFIER_<number>. */
2723 sprintf (id, "%s_%u", SSDF_IDENTIFIER, count);
2725 /* Create the parameters. */
2726 parm_types = void_list_node;
2727 parm_types = tree_cons (NULL_TREE, integer_type_node, parm_types);
2728 parm_types = tree_cons (NULL_TREE, integer_type_node, parm_types);
2729 type = build_function_type (void_type_node, parm_types);
2731 /* Create the FUNCTION_DECL itself. */
2732 ssdf_decl = build_lang_decl (FUNCTION_DECL,
2733 get_identifier (id),
2735 TREE_PUBLIC (ssdf_decl) = 0;
2736 DECL_ARTIFICIAL (ssdf_decl) = 1;
2738 /* Put this function in the list of functions to be called from the
2739 static constructors and destructors. */
2742 ssdf_decls = VEC_alloc (tree, gc, 32);
2744 /* Take this opportunity to initialize the map from priority
2745 numbers to information about that priority level. */
2746 priority_info_map = splay_tree_new (splay_tree_compare_ints,
2747 /*delete_key_fn=*/0,
2748 /*delete_value_fn=*/
2749 (splay_tree_delete_value_fn) &free);
2751 /* We always need to generate functions for the
2752 DEFAULT_INIT_PRIORITY so enter it now. That way when we walk
2753 priorities later, we'll be sure to find the
2754 DEFAULT_INIT_PRIORITY. */
2755 get_priority_info (DEFAULT_INIT_PRIORITY);
2758 VEC_safe_push (tree, gc, ssdf_decls, ssdf_decl);
2760 /* Create the argument list. */
2761 initialize_p_decl = cp_build_parm_decl
2762 (get_identifier (INITIALIZE_P_IDENTIFIER), integer_type_node);
2763 DECL_CONTEXT (initialize_p_decl) = ssdf_decl;
2764 TREE_USED (initialize_p_decl) = 1;
2765 priority_decl = cp_build_parm_decl
2766 (get_identifier (PRIORITY_IDENTIFIER), integer_type_node);
2767 DECL_CONTEXT (priority_decl) = ssdf_decl;
2768 TREE_USED (priority_decl) = 1;
2770 TREE_CHAIN (initialize_p_decl) = priority_decl;
2771 DECL_ARGUMENTS (ssdf_decl) = initialize_p_decl;
2773 /* Put the function in the global scope. */
2774 pushdecl (ssdf_decl);
2776 /* Start the function itself. This is equivalent to declaring the
2779 static void __ssdf (int __initialize_p, init __priority_p);
2781 It is static because we only need to call this function from the
2782 various constructor and destructor functions for this module. */
2783 start_preparsed_function (ssdf_decl,
2784 /*attrs=*/NULL_TREE,
2787 /* Set up the scope of the outermost block in the function. */
2788 body = begin_compound_stmt (BCS_FN_BODY);
2793 /* Finish the generation of the function which performs initialization
2794 and destruction of objects with static storage duration. After
2795 this point, no more such objects can be created. */
2798 finish_static_storage_duration_function (tree body)
2800 /* Close out the function. */
2801 finish_compound_stmt (body);
2802 expand_or_defer_fn (finish_function (0));
2805 /* Return the information about the indicated PRIORITY level. If no
2806 code to handle this level has yet been generated, generate the
2807 appropriate prologue. */
2809 static priority_info
2810 get_priority_info (int priority)
2815 n = splay_tree_lookup (priority_info_map,
2816 (splay_tree_key) priority);
2819 /* Create a new priority information structure, and insert it
2821 pi = XNEW (struct priority_info_s);
2822 pi->initializations_p = 0;
2823 pi->destructions_p = 0;
2824 splay_tree_insert (priority_info_map,
2825 (splay_tree_key) priority,
2826 (splay_tree_value) pi);
2829 pi = (priority_info) n->value;
2834 /* The effective initialization priority of a DECL. */
2836 #define DECL_EFFECTIVE_INIT_PRIORITY(decl) \
2837 ((!DECL_HAS_INIT_PRIORITY_P (decl) || DECL_INIT_PRIORITY (decl) == 0) \
2838 ? DEFAULT_INIT_PRIORITY : DECL_INIT_PRIORITY (decl))
2840 /* Whether a DECL needs a guard to protect it against multiple
2843 #define NEEDS_GUARD_P(decl) (TREE_PUBLIC (decl) && (DECL_COMMON (decl) \
2844 || DECL_ONE_ONLY (decl) \
2845 || DECL_WEAK (decl)))
2847 /* Called from one_static_initialization_or_destruction(),
2849 Walks the initializer list of a global variable and looks for
2850 temporary variables (DECL_NAME() == NULL and DECL_ARTIFICIAL != 0)
2851 and that have their DECL_CONTEXT() == NULL.
2852 For each such temporary variable, set their DECL_CONTEXT() to
2853 the current function. This is necessary because otherwise
2854 some optimizers (enabled by -O2 -fprofile-arcs) might crash
2855 when trying to refer to a temporary variable that does not have
2856 it's DECL_CONTECT() properly set. */
2858 fix_temporary_vars_context_r (tree *node,
2859 int *unused ATTRIBUTE_UNUSED,
2860 void *unused1 ATTRIBUTE_UNUSED)
2862 gcc_assert (current_function_decl);
2864 if (TREE_CODE (*node) == BIND_EXPR)
2868 for (var = BIND_EXPR_VARS (*node); var; var = TREE_CHAIN (var))
2869 if (TREE_CODE (var) == VAR_DECL
2871 && DECL_ARTIFICIAL (var)
2872 && !DECL_CONTEXT (var))
2873 DECL_CONTEXT (var) = current_function_decl;
2879 /* Set up to handle the initialization or destruction of DECL. If
2880 INITP is nonzero, we are initializing the variable. Otherwise, we
2881 are destroying it. */
2884 one_static_initialization_or_destruction (tree decl, tree init, bool initp)
2886 tree guard_if_stmt = NULL_TREE;
2889 /* If we are supposed to destruct and there's a trivial destructor,
2890 nothing has to be done. */
2892 && TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
2895 /* Trick the compiler into thinking we are at the file and line
2896 where DECL was declared so that error-messages make sense, and so
2897 that the debugger will show somewhat sensible file and line
2899 input_location = DECL_SOURCE_LOCATION (decl);
2901 /* Make sure temporary variables in the initialiser all have
2902 their DECL_CONTEXT() set to a value different from NULL_TREE.
2903 This can happen when global variables initialisers are built.
2904 In that case, the DECL_CONTEXT() of the global variables _AND_ of all
2905 the temporary variables that might have been generated in the
2906 accompagning initialisers is NULL_TREE, meaning the variables have been
2907 declared in the global namespace.
2908 What we want to do here is to fix that and make sure the DECL_CONTEXT()
2909 of the temporaries are set to the current function decl. */
2910 cp_walk_tree_without_duplicates (&init,
2911 fix_temporary_vars_context_r,
2918 Access control for implicit calls to the constructors,
2919 the conversion functions, or the destructor called to
2920 create and destroy a static data member is performed as
2921 if these calls appeared in the scope of the member's
2924 we pretend we are in a static member function of the class of
2925 which the DECL is a member. */
2926 if (member_p (decl))
2928 DECL_CONTEXT (current_function_decl) = DECL_CONTEXT (decl);
2929 DECL_STATIC_FUNCTION_P (current_function_decl) = 1;
2932 /* Assume we don't need a guard. */
2934 /* We need a guard if this is an object with external linkage that
2935 might be initialized in more than one place. (For example, a
2936 static data member of a template, when the data member requires
2938 if (NEEDS_GUARD_P (decl))
2942 guard = get_guard (decl);
2944 /* When using __cxa_atexit, we just check the GUARD as we would
2945 for a local static. */
2946 if (flag_use_cxa_atexit)
2948 /* When using __cxa_atexit, we never try to destroy
2949 anything from a static destructor. */
2951 guard_cond = get_guard_cond (guard);
2953 /* If we don't have __cxa_atexit, then we will be running
2954 destructors from .fini sections, or their equivalents. So,
2955 we need to know how many times we've tried to initialize this
2956 object. We do initializations only if the GUARD is zero,
2957 i.e., if we are the first to initialize the variable. We do
2958 destructions only if the GUARD is one, i.e., if we are the
2959 last to destroy the variable. */
2962 = cp_build_binary_op (input_location,
2964 cp_build_unary_op (PREINCREMENT_EXPR,
2967 tf_warning_or_error),
2969 tf_warning_or_error);
2972 = cp_build_binary_op (input_location,
2974 cp_build_unary_op (PREDECREMENT_EXPR,
2977 tf_warning_or_error),
2979 tf_warning_or_error);
2981 guard_if_stmt = begin_if_stmt ();
2982 finish_if_stmt_cond (guard_cond, guard_if_stmt);
2986 /* If we're using __cxa_atexit, we have not already set the GUARD,
2987 so we must do so now. */
2988 if (guard && initp && flag_use_cxa_atexit)
2989 finish_expr_stmt (set_guard (guard));
2991 /* Perform the initialization or destruction. */
2995 finish_expr_stmt (init);
2997 /* If we're using __cxa_atexit, register a function that calls the
2998 destructor for the object. */
2999 if (flag_use_cxa_atexit)
3000 finish_expr_stmt (register_dtor_fn (decl));
3003 finish_expr_stmt (build_cleanup (decl));
3005 /* Finish the guard if-stmt, if necessary. */
3008 finish_then_clause (guard_if_stmt);
3009 finish_if_stmt (guard_if_stmt);
3012 /* Now that we're done with DECL we don't need to pretend to be a
3013 member of its class any longer. */
3014 DECL_CONTEXT (current_function_decl) = NULL_TREE;
3015 DECL_STATIC_FUNCTION_P (current_function_decl) = 0;
3018 /* Generate code to do the initialization or destruction of the decls in VARS,
3019 a TREE_LIST of VAR_DECL with static storage duration.
3020 Whether initialization or destruction is performed is specified by INITP. */
3023 do_static_initialization_or_destruction (tree vars, bool initp)
3025 tree node, init_if_stmt, cond;
3027 /* Build the outer if-stmt to check for initialization or destruction. */
3028 init_if_stmt = begin_if_stmt ();
3029 cond = initp ? integer_one_node : integer_zero_node;
3030 cond = cp_build_binary_op (input_location,
3034 tf_warning_or_error);
3035 finish_if_stmt_cond (cond, init_if_stmt);
3039 tree decl = TREE_VALUE (node);
3040 tree priority_if_stmt;
3044 /* If we don't need a destructor, there's nothing to do. Avoid
3045 creating a possibly empty if-stmt. */
3046 if (!initp && TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
3048 node = TREE_CHAIN (node);
3052 /* Remember that we had an initialization or finalization at this
3054 priority = DECL_EFFECTIVE_INIT_PRIORITY (decl);
3055 pi = get_priority_info (priority);
3057 pi->initializations_p = 1;
3059 pi->destructions_p = 1;
3061 /* Conditionalize this initialization on being in the right priority
3062 and being initializing/finalizing appropriately. */
3063 priority_if_stmt = begin_if_stmt ();
3064 cond = cp_build_binary_op (input_location,
3067 build_int_cst (NULL_TREE, priority),
3068 tf_warning_or_error);
3069 finish_if_stmt_cond (cond, priority_if_stmt);
3071 /* Process initializers with same priority. */
3073 && DECL_EFFECTIVE_INIT_PRIORITY (TREE_VALUE (node)) == priority;
3074 node = TREE_CHAIN (node))
3075 /* Do one initialization or destruction. */
3076 one_static_initialization_or_destruction (TREE_VALUE (node),
3077 TREE_PURPOSE (node), initp);
3079 /* Finish up the priority if-stmt body. */
3080 finish_then_clause (priority_if_stmt);
3081 finish_if_stmt (priority_if_stmt);
3085 /* Finish up the init/destruct if-stmt body. */
3086 finish_then_clause (init_if_stmt);
3087 finish_if_stmt (init_if_stmt);
3090 /* VARS is a list of variables with static storage duration which may
3091 need initialization and/or finalization. Remove those variables
3092 that don't really need to be initialized or finalized, and return
3093 the resulting list. The order in which the variables appear in
3094 VARS is in reverse order of the order in which they should actually
3095 be initialized. The list we return is in the unreversed order;
3096 i.e., the first variable should be initialized first. */
3099 prune_vars_needing_no_initialization (tree *vars)
3102 tree result = NULL_TREE;
3107 tree decl = TREE_VALUE (t);
3108 tree init = TREE_PURPOSE (t);
3110 /* Deal gracefully with error. */
3111 if (decl == error_mark_node)
3113 var = &TREE_CHAIN (t);
3117 /* The only things that can be initialized are variables. */
3118 gcc_assert (TREE_CODE (decl) == VAR_DECL);
3120 /* If this object is not defined, we don't need to do anything
3122 if (DECL_EXTERNAL (decl))
3124 var = &TREE_CHAIN (t);
3128 /* Also, if the initializer already contains errors, we can bail
3130 if (init && TREE_CODE (init) == TREE_LIST
3131 && value_member (error_mark_node, init))
3133 var = &TREE_CHAIN (t);
3137 /* This variable is going to need initialization and/or
3138 finalization, so we add it to the list. */
3139 *var = TREE_CHAIN (t);
3140 TREE_CHAIN (t) = result;
3147 /* Make sure we have told the back end about all the variables in
3151 write_out_vars (tree vars)
3155 for (v = vars; v; v = TREE_CHAIN (v))
3157 tree var = TREE_VALUE (v);
3158 if (!var_finalized_p (var))
3160 import_export_decl (var);
3161 rest_of_decl_compilation (var, 1, 1);
3166 /* Generate a static constructor (if CONSTRUCTOR_P) or destructor
3167 (otherwise) that will initialize all global objects with static
3168 storage duration having the indicated PRIORITY. */
3171 generate_ctor_or_dtor_function (bool constructor_p, int priority,
3180 input_location = *locus;
3182 /* Was: locus->line++; */
3184 /* We use `I' to indicate initialization and `D' to indicate
3186 function_key = constructor_p ? 'I' : 'D';
3188 /* We emit the function lazily, to avoid generating empty
3189 global constructors and destructors. */
3192 /* For Objective-C++, we may need to initialize metadata found in this module.
3193 This must be done _before_ any other static initializations. */
3194 if (c_dialect_objc () && (priority == DEFAULT_INIT_PRIORITY)
3195 && constructor_p && objc_static_init_needed_p ())
3197 body = start_objects (function_key, priority);
3198 objc_generate_static_init_call (NULL_TREE);
3201 /* Call the static storage duration function with appropriate
3203 for (i = 0; VEC_iterate (tree, ssdf_decls, i, fndecl); ++i)
3205 /* Calls to pure or const functions will expand to nothing. */
3206 if (! (flags_from_decl_or_type (fndecl) & (ECF_CONST | ECF_PURE)))
3209 body = start_objects (function_key, priority);
3211 arguments = tree_cons (NULL_TREE,
3212 build_int_cst (NULL_TREE, priority),
3214 arguments = tree_cons (NULL_TREE,
3215 build_int_cst (NULL_TREE, constructor_p),
3217 finish_expr_stmt (cp_build_function_call (fndecl, arguments,
3218 tf_warning_or_error));
3222 /* Close out the function. */
3224 finish_objects (function_key, priority, body);
3227 /* Generate constructor and destructor functions for the priority
3231 generate_ctor_and_dtor_functions_for_priority (splay_tree_node n, void * data)
3233 location_t *locus = (location_t *) data;
3234 int priority = (int) n->key;
3235 priority_info pi = (priority_info) n->value;
3237 /* Generate the functions themselves, but only if they are really
3239 if (pi->initializations_p)
3240 generate_ctor_or_dtor_function (/*constructor_p=*/true, priority, locus);
3241 if (pi->destructions_p)
3242 generate_ctor_or_dtor_function (/*constructor_p=*/false, priority, locus);
3244 /* Keep iterating. */
3248 /* Called via LANGHOOK_CALLGRAPH_ANALYZE_EXPR. It is supposed to mark
3249 decls referenced from front-end specific constructs; it will be called
3250 only for language-specific tree nodes.
3252 Here we must deal with member pointers. */
3255 cxx_callgraph_analyze_expr (tree *tp, int *walk_subtrees ATTRIBUTE_UNUSED)
3259 switch (TREE_CODE (t))
3262 if (TYPE_PTRMEMFUNC_P (TREE_TYPE (t)))
3263 cgraph_mark_needed_node (cgraph_node (PTRMEM_CST_MEMBER (t)));
3266 if (TREE_CODE (BASELINK_FUNCTIONS (t)) == FUNCTION_DECL)
3267 cgraph_mark_needed_node (cgraph_node (BASELINK_FUNCTIONS (t)));
3270 if (DECL_VTABLE_OR_VTT_P (t))
3272 /* The ABI requires that all virtual tables be emitted
3273 whenever one of them is. */
3275 for (vtbl = CLASSTYPE_VTABLES (DECL_CONTEXT (t));
3277 vtbl = TREE_CHAIN (vtbl))
3278 mark_decl_referenced (vtbl);
3280 else if (DECL_CONTEXT (t)
3281 && TREE_CODE (DECL_CONTEXT (t)) == FUNCTION_DECL)
3282 /* If we need a static variable in a function, then we
3283 need the containing function. */
3284 mark_decl_referenced (DECL_CONTEXT (t));
3293 /* Java requires that we be able to reference a local address for a
3294 method, and not be confused by PLT entries. If hidden aliases are
3295 supported, emit one for each java function that we've emitted. */
3298 build_java_method_aliases (void)
3300 struct cgraph_node *node;
3302 #ifndef HAVE_GAS_HIDDEN
3306 for (node = cgraph_nodes; node ; node = node->next)
3308 tree fndecl = node->decl;
3310 if (TREE_ASM_WRITTEN (fndecl)
3311 && DECL_CONTEXT (fndecl)
3312 && TYPE_P (DECL_CONTEXT (fndecl))
3313 && TYPE_FOR_JAVA (DECL_CONTEXT (fndecl))
3314 && TARGET_USE_LOCAL_THUNK_ALIAS_P (fndecl))
3316 /* Mangle the name in a predictable way; we need to reference
3317 this from a java compiled object file. */
3318 tree oid, nid, alias;
3322 oid = DECL_ASSEMBLER_NAME (fndecl);
3323 oname = IDENTIFIER_POINTER (oid);
3324 gcc_assert (oname[0] == '_' && oname[1] == 'Z');
3325 nname = ACONCAT (("_ZGA", oname+2, NULL));
3326 nid = get_identifier (nname);
3328 alias = make_alias_for (fndecl, nid);
3329 TREE_PUBLIC (alias) = 1;
3330 DECL_VISIBILITY (alias) = VISIBILITY_HIDDEN;
3332 assemble_alias (alias, oid);
3337 /* This routine is called at the end of compilation.
3338 Its job is to create all the code needed to initialize and
3339 destroy the global aggregates. We do the destruction
3340 first, since that way we only need to reverse the decls once. */
3343 cp_write_global_declarations (void)
3349 unsigned ssdf_count = 0;
3353 locus = input_location;
3356 /* Bad parse errors. Just forget about it. */
3357 if (! global_bindings_p () || current_class_type || decl_namespace_list)
3361 c_common_write_pch ();
3363 /* FIXME - huh? was input_line -= 1;*/
3365 /* We now have to write out all the stuff we put off writing out.
3368 o Template specializations that we have not yet instantiated,
3369 but which are needed.
3370 o Initialization and destruction for non-local objects with
3371 static storage duration. (Local objects with static storage
3372 duration are initialized when their scope is first entered,
3373 and are cleaned up via atexit.)
3374 o Virtual function tables.
3376 All of these may cause others to be needed. For example,
3377 instantiating one function may cause another to be needed, and
3378 generating the initializer for an object may cause templates to be
3379 instantiated, etc., etc. */
3381 timevar_push (TV_VARCONST);
3383 emit_support_tinfos ();
3392 /* If there are templates that we've put off instantiating, do
3394 instantiate_pending_templates (retries);
3397 /* Write out virtual tables as required. Note that writing out
3398 the virtual table for a template class may cause the
3399 instantiation of members of that class. If we write out
3400 vtables then we remove the class from our list so we don't
3401 have to look at it again. */
3403 while (keyed_classes != NULL_TREE
3404 && maybe_emit_vtables (TREE_VALUE (keyed_classes)))
3407 keyed_classes = TREE_CHAIN (keyed_classes);
3413 tree next = TREE_CHAIN (t);
3417 if (maybe_emit_vtables (TREE_VALUE (next)))
3420 TREE_CHAIN (t) = TREE_CHAIN (next);
3425 next = TREE_CHAIN (t);
3429 /* Write out needed type info variables. We have to be careful
3430 looping through unemitted decls, because emit_tinfo_decl may
3431 cause other variables to be needed. New elements will be
3432 appended, and we remove from the vector those that actually
3434 for (i = VEC_length (tree, unemitted_tinfo_decls);
3435 VEC_iterate (tree, unemitted_tinfo_decls, --i, t);)
3436 if (emit_tinfo_decl (t))
3439 VEC_unordered_remove (tree, unemitted_tinfo_decls, i);
3442 /* The list of objects with static storage duration is built up
3443 in reverse order. We clear STATIC_AGGREGATES so that any new
3444 aggregates added during the initialization of these will be
3445 initialized in the correct order when we next come around the
3447 vars = prune_vars_needing_no_initialization (&static_aggregates);
3451 /* We need to start a new initialization function each time
3452 through the loop. That's because we need to know which
3453 vtables have been referenced, and TREE_SYMBOL_REFERENCED
3454 isn't computed until a function is finished, and written
3455 out. That's a deficiency in the back end. When this is
3456 fixed, these initialization functions could all become
3457 inline, with resulting performance improvements. */
3460 /* Set the line and file, so that it is obviously not from
3462 input_location = locus;
3463 ssdf_body = start_static_storage_duration_function (ssdf_count);
3465 /* Make sure the back end knows about all the variables. */
3466 write_out_vars (vars);
3468 /* First generate code to do all the initializations. */
3470 do_static_initialization_or_destruction (vars, /*initp=*/true);
3472 /* Then, generate code to do all the destructions. Do these
3473 in reverse order so that the most recently constructed
3474 variable is the first destroyed. If we're using
3475 __cxa_atexit, then we don't need to do this; functions
3476 were registered at initialization time to destroy the
3478 if (!flag_use_cxa_atexit && vars)
3480 vars = nreverse (vars);
3481 do_static_initialization_or_destruction (vars, /*initp=*/false);
3486 /* Finish up the static storage duration function for this
3488 input_location = locus;
3489 finish_static_storage_duration_function (ssdf_body);
3491 /* All those initializations and finalizations might cause
3492 us to need more inline functions, more template
3493 instantiations, etc. */
3496 /* ??? was: locus.line++; */
3499 /* Go through the set of inline functions whose bodies have not
3500 been emitted yet. If out-of-line copies of these functions
3501 are required, emit them. */
3502 for (i = 0; VEC_iterate (tree, deferred_fns, i, decl); ++i)
3504 /* Does it need synthesizing? */
3505 if (DECL_DEFAULTED_FN (decl) && ! DECL_INITIAL (decl)
3506 && (! DECL_REALLY_EXTERN (decl) || possibly_inlined_p (decl)))
3508 /* Even though we're already at the top-level, we push
3509 there again. That way, when we pop back a few lines
3510 hence, all of our state is restored. Otherwise,
3511 finish_function doesn't clean things up, and we end
3512 up with CURRENT_FUNCTION_DECL set. */
3513 push_to_top_level ();
3514 /* The decl's location will mark where it was first
3515 needed. Save that so synthesize method can indicate
3516 where it was needed from, in case of error */
3517 input_location = DECL_SOURCE_LOCATION (decl);
3518 synthesize_method (decl);
3519 pop_from_top_level ();
3523 if (!gimple_body (decl))
3526 /* We lie to the back end, pretending that some functions
3527 are not defined when they really are. This keeps these
3528 functions from being put out unnecessarily. But, we must
3529 stop lying when the functions are referenced, or if they
3530 are not comdat since they need to be put out now. If
3531 DECL_INTERFACE_KNOWN, then we have already set
3532 DECL_EXTERNAL appropriately, so there's no need to check
3533 again, and we do not want to clear DECL_EXTERNAL if a
3534 previous call to import_export_decl set it.
3536 This is done in a separate for cycle, because if some
3537 deferred function is contained in another deferred
3538 function later in deferred_fns varray,
3539 rest_of_compilation would skip this function and we
3540 really cannot expand the same function twice. */
3541 import_export_decl (decl);
3542 if (DECL_NOT_REALLY_EXTERN (decl)
3543 && DECL_INITIAL (decl)
3544 && decl_needed_p (decl))
3545 DECL_EXTERNAL (decl) = 0;
3547 /* If we're going to need to write this function out, and
3548 there's already a body for it, create RTL for it now.
3549 (There might be no body if this is a method we haven't
3550 gotten around to synthesizing yet.) */
3551 if (!DECL_EXTERNAL (decl)
3552 && decl_needed_p (decl)
3553 && !TREE_ASM_WRITTEN (decl)
3554 && !cgraph_node (decl)->local.finalized)
3556 /* We will output the function; no longer consider it in this
3558 DECL_DEFER_OUTPUT (decl) = 0;
3559 /* Generate RTL for this function now that we know we
3561 expand_or_defer_fn (decl);
3562 /* If we're compiling -fsyntax-only pretend that this
3563 function has been written out so that we don't try to
3565 if (flag_syntax_only)
3566 TREE_ASM_WRITTEN (decl) = 1;
3571 if (walk_namespaces (wrapup_globals_for_namespace, /*data=*/0))
3574 /* Static data members are just like namespace-scope globals. */
3575 for (i = 0; VEC_iterate (tree, pending_statics, i, decl); ++i)
3577 if (var_finalized_p (decl) || DECL_REALLY_EXTERN (decl)
3578 /* Don't write it out if we haven't seen a definition. */
3579 || DECL_IN_AGGR_P (decl))
3581 import_export_decl (decl);
3582 /* If this static data member is needed, provide it to the
3584 if (DECL_NOT_REALLY_EXTERN (decl) && decl_needed_p (decl))
3585 DECL_EXTERNAL (decl) = 0;
3587 if (VEC_length (tree, pending_statics) != 0
3588 && wrapup_global_declarations (VEC_address (tree, pending_statics),
3589 VEC_length (tree, pending_statics)))
3596 /* All used inline functions must have a definition at this point. */
3597 for (i = 0; VEC_iterate (tree, deferred_fns, i, decl); ++i)
3599 if (/* Check online inline functions that were actually used. */
3600 TREE_USED (decl) && DECL_DECLARED_INLINE_P (decl)
3601 /* If the definition actually was available here, then the
3602 fact that the function was not defined merely represents
3603 that for some reason (use of a template repository,
3604 #pragma interface, etc.) we decided not to emit the
3606 && !DECL_INITIAL (decl)
3607 /* An explicit instantiation can be used to specify
3608 that the body is in another unit. It will have
3609 already verified there was a definition. */
3610 && !DECL_EXPLICIT_INSTANTIATION (decl))
3612 warning (0, "inline function %q+D used but never defined", decl);
3613 /* Avoid a duplicate warning from check_global_declaration_1. */
3614 TREE_NO_WARNING (decl) = 1;
3618 /* We give C linkage to static constructors and destructors. */
3619 push_lang_context (lang_name_c);
3621 /* Generate initialization and destruction functions for all
3622 priorities for which they are required. */
3623 if (priority_info_map)
3624 splay_tree_foreach (priority_info_map,
3625 generate_ctor_and_dtor_functions_for_priority,
3627 else if (c_dialect_objc () && objc_static_init_needed_p ())
3628 /* If this is obj-c++ and we need a static init, call
3629 generate_ctor_or_dtor_function. */
3630 generate_ctor_or_dtor_function (/*constructor_p=*/true,
3631 DEFAULT_INIT_PRIORITY, &locus);
3633 /* We're done with the splay-tree now. */
3634 if (priority_info_map)
3635 splay_tree_delete (priority_info_map);
3637 /* Generate any missing aliases. */
3638 maybe_apply_pending_pragma_weaks ();
3640 /* We're done with static constructors, so we can go back to "C++"
3642 pop_lang_context ();
3644 cgraph_finalize_compilation_unit ();
3647 /* Now, issue warnings about static, but not defined, functions,
3648 etc., and emit debugging information. */
3649 walk_namespaces (wrapup_globals_for_namespace, /*data=*/&reconsider);
3650 if (VEC_length (tree, pending_statics) != 0)
3652 check_global_declarations (VEC_address (tree, pending_statics),
3653 VEC_length (tree, pending_statics));
3654 emit_debug_global_declarations (VEC_address (tree, pending_statics),
3655 VEC_length (tree, pending_statics));
3658 /* Generate hidden aliases for Java. */
3659 build_java_method_aliases ();
3663 /* The entire file is now complete. If requested, dump everything
3667 FILE *stream = dump_begin (TDI_tu, &flags);
3671 dump_node (global_namespace, flags & ~TDF_SLIM, stream);
3672 dump_end (TDI_tu, stream);
3676 timevar_pop (TV_VARCONST);
3678 if (flag_detailed_statistics)
3680 dump_tree_statistics ();
3681 dump_time_statistics ();
3683 input_location = locus;
3685 #ifdef ENABLE_CHECKING
3686 validate_conversion_obstack ();
3687 #endif /* ENABLE_CHECKING */
3690 /* FN is an OFFSET_REF, DOTSTAR_EXPR or MEMBER_REF indicating the
3691 function to call in parse-tree form; it has not yet been
3692 semantically analyzed. ARGS are the arguments to the function.
3693 They have already been semantically analyzed. */
3696 build_offset_ref_call_from_tree (tree fn, tree args)
3705 object = TREE_OPERAND (fn, 0);
3707 if (processing_template_decl)
3709 gcc_assert (TREE_CODE (fn) == DOTSTAR_EXPR
3710 || TREE_CODE (fn) == MEMBER_REF);
3711 if (type_dependent_expression_p (fn)
3712 || any_type_dependent_arguments_p (args))
3713 return build_nt_call_list (fn, args);
3715 /* Transform the arguments and add the implicit "this"
3716 parameter. That must be done before the FN is transformed
3717 because we depend on the form of FN. */
3718 args = build_non_dependent_args (args);
3719 object = build_non_dependent_expr (object);
3720 if (TREE_CODE (fn) == DOTSTAR_EXPR)
3721 object = cp_build_unary_op (ADDR_EXPR, object, 0, tf_warning_or_error);
3722 args = tree_cons (NULL_TREE, object, args);
3723 /* Now that the arguments are done, transform FN. */
3724 fn = build_non_dependent_expr (fn);
3727 /* A qualified name corresponding to a bound pointer-to-member is
3728 represented as an OFFSET_REF:
3730 struct B { void g(); };
3732 void B::g() { (this->*p)(); } */
3733 if (TREE_CODE (fn) == OFFSET_REF)
3735 tree object_addr = cp_build_unary_op (ADDR_EXPR, object, 0,
3736 tf_warning_or_error);
3737 fn = TREE_OPERAND (fn, 1);
3738 fn = get_member_function_from_ptrfunc (&object_addr, fn);
3739 args = tree_cons (NULL_TREE, object_addr, args);
3742 expr = cp_build_function_call (fn, args, tf_warning_or_error);
3743 if (processing_template_decl && expr != error_mark_node)
3744 return build_min_non_dep_call_list (expr, orig_fn, orig_args);
3750 check_default_args (tree x)
3752 tree arg = TYPE_ARG_TYPES (TREE_TYPE (x));
3753 bool saw_def = false;
3754 int i = 0 - (TREE_CODE (TREE_TYPE (x)) == METHOD_TYPE);
3755 for (; arg && arg != void_list_node; arg = TREE_CHAIN (arg), ++i)
3757 if (TREE_PURPOSE (arg))
3761 error ("default argument missing for parameter %P of %q+#D", i, x);
3762 TREE_PURPOSE (arg) = error_mark_node;
3767 /* Return true if function DECL can be inlined. This is used to force
3768 instantiation of methods that might be interesting for inlining. */
3770 possibly_inlined_p (tree decl)
3772 gcc_assert (TREE_CODE (decl) == FUNCTION_DECL);
3773 if (DECL_UNINLINABLE (decl))
3776 return DECL_DECLARED_INLINE_P (decl);
3777 /* When optimizing, we might inline everything when flatten
3778 attribute or heuristics inlining for size or autoinlining
3783 /* Mark DECL (either a _DECL or a BASELINK) as "used" in the program.
3784 If DECL is a specialization or implicitly declared class member,
3785 generate the actual definition. */
3788 mark_used (tree decl)
3790 HOST_WIDE_INT saved_processing_template_decl = 0;
3792 /* If DECL is a BASELINK for a single function, then treat it just
3793 like the DECL for the function. Otherwise, if the BASELINK is
3794 for an overloaded function, we don't know which function was
3795 actually used until after overload resolution. */
3796 if (TREE_CODE (decl) == BASELINK)
3798 decl = BASELINK_FUNCTIONS (decl);
3799 if (really_overloaded_fn (decl))
3801 decl = OVL_CURRENT (decl);
3804 TREE_USED (decl) = 1;
3805 if (DECL_CLONED_FUNCTION_P (decl))
3806 TREE_USED (DECL_CLONED_FUNCTION (decl)) = 1;
3807 if (TREE_CODE (decl) == FUNCTION_DECL
3808 && DECL_DELETED_FN (decl))
3810 error ("deleted function %q+D", decl);
3811 error ("used here");
3813 /* If we don't need a value, then we don't need to synthesize DECL. */
3814 if (skip_evaluation)
3817 /* If within finish_function, defer the rest until that function
3818 finishes, otherwise it might recurse. */
3819 if (defer_mark_used_calls)
3821 VEC_safe_push (tree, gc, deferred_mark_used_calls, decl);
3825 /* Normally, we can wait until instantiation-time to synthesize
3826 DECL. However, if DECL is a static data member initialized with
3827 a constant, we need the value right now because a reference to
3828 such a data member is not value-dependent. */
3829 if (TREE_CODE (decl) == VAR_DECL
3830 && DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl)
3831 && DECL_CLASS_SCOPE_P (decl))
3833 /* Don't try to instantiate members of dependent types. We
3834 cannot just use dependent_type_p here because this function
3835 may be called from fold_non_dependent_expr, and then we may
3836 see dependent types, even though processing_template_decl
3838 if (CLASSTYPE_TEMPLATE_INFO ((DECL_CONTEXT (decl)))
3839 && uses_template_parms (CLASSTYPE_TI_ARGS (DECL_CONTEXT (decl))))
3841 /* Pretend that we are not in a template, even if we are, so
3842 that the static data member initializer will be processed. */
3843 saved_processing_template_decl = processing_template_decl;
3844 processing_template_decl = 0;
3847 if (processing_template_decl)
3850 if (TREE_CODE (decl) == FUNCTION_DECL && DECL_DECLARED_INLINE_P (decl)
3851 && !TREE_ASM_WRITTEN (decl))
3852 /* Remember it, so we can check it was defined. */
3854 if (DECL_DEFERRED_FN (decl))
3857 /* Remember the current location for a function we will end up
3858 synthesizing. Then we can inform the user where it was
3859 required in the case of error. */
3860 if (DECL_ARTIFICIAL (decl) && DECL_NONSTATIC_MEMBER_FUNCTION_P (decl)
3861 && !DECL_THUNK_P (decl))
3862 DECL_SOURCE_LOCATION (decl) = input_location;
3864 note_vague_linkage_fn (decl);
3867 /* Is it a synthesized method that needs to be synthesized? */
3868 if (TREE_CODE (decl) == FUNCTION_DECL
3869 && DECL_NONSTATIC_MEMBER_FUNCTION_P (decl)
3870 && DECL_DEFAULTED_FN (decl)
3871 && !DECL_THUNK_P (decl)
3872 && ! DECL_INITIAL (decl)
3873 /* Kludge: don't synthesize for default args. Unfortunately this
3874 rules out initializers of namespace-scoped objects too, but
3875 it's sort-of ok if the implicit ctor or dtor decl keeps
3876 pointing to the class location. */
3877 && current_function_decl)
3879 synthesize_method (decl);
3880 /* If we've already synthesized the method we don't need to
3881 do the instantiation test below. */
3883 else if ((DECL_NON_THUNK_FUNCTION_P (decl) || TREE_CODE (decl) == VAR_DECL)
3884 && DECL_LANG_SPECIFIC (decl) && DECL_TEMPLATE_INFO (decl)
3885 && (!DECL_EXPLICIT_INSTANTIATION (decl)
3886 || (TREE_CODE (decl) == FUNCTION_DECL
3887 && possibly_inlined_p
3888 (DECL_TEMPLATE_RESULT (
3889 template_for_substitution (decl))))
3890 /* We need to instantiate static data members so that there
3891 initializers are available in integral constant
3893 || (TREE_CODE (decl) == VAR_DECL
3894 && DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl))))
3895 /* If this is a function or variable that is an instance of some
3896 template, we now know that we will need to actually do the
3897 instantiation. We check that DECL is not an explicit
3898 instantiation because that is not checked in instantiate_decl.
3900 We put off instantiating functions in order to improve compile
3901 times. Maintaining a stack of active functions is expensive,
3902 and the inliner knows to instantiate any functions it might
3903 need. Therefore, we always try to defer instantiation. */
3904 instantiate_decl (decl, /*defer_ok=*/true,
3905 /*expl_inst_class_mem_p=*/false);
3907 processing_template_decl = saved_processing_template_decl;
3910 /* Given function PARM_DECL PARM, return its index in the function's list
3911 of parameters, beginning with 1. */
3914 parm_index (tree parm)
3919 for (index = 1, arg = DECL_ARGUMENTS (DECL_CONTEXT (parm));
3921 ++index, arg = TREE_CHAIN (arg))
3923 if (DECL_NAME (parm) == DECL_NAME (arg))
3925 if (DECL_ARTIFICIAL (arg))
3933 #include "gt-cp-decl2.h"