1 /* Process declarations and variables for C++ compiler.
2 Copyright (C) 1988, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
3 1999, 2000, 2001, 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
4 Hacked by Michael Tiemann (tiemann@cygnus.com)
6 This file is part of GCC.
8 GCC is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2, or (at your option)
13 GCC is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING. If not, write to
20 the Free Software Foundation, 51 Franklin Street, Fifth Floor,
21 Boston, MA 02110-1301, USA. */
24 /* Process declarations and symbol lookup for C++ front end.
25 Also constructs types; the standard scalar types at initialization,
26 and structure, union, array and enum types when they are declared. */
28 /* ??? not all decl nodes are given the most useful possible
29 line numbers. For example, the CONST_DECLs for enum values. */
33 #include "coretypes.h"
48 #include "tree-mudflap.h"
50 #include "tree-inline.h"
52 #include "tree-dump.h"
55 extern cpp_reader *parse_in;
57 /* This structure contains information about the initializations
58 and/or destructions required for a particular priority level. */
59 typedef struct priority_info_s {
60 /* Nonzero if there have been any initializations at this priority
61 throughout the translation unit. */
62 int initializations_p;
63 /* Nonzero if there have been any destructions at this priority
64 throughout the translation unit. */
68 static void mark_vtable_entries (tree);
69 static bool maybe_emit_vtables (tree);
70 static bool acceptable_java_type (tree);
71 static tree start_objects (int, int);
72 static void finish_objects (int, int, tree);
73 static tree start_static_storage_duration_function (unsigned);
74 static void finish_static_storage_duration_function (tree);
75 static priority_info get_priority_info (int);
76 static void do_static_initialization_or_destruction (tree, bool);
77 static void one_static_initialization_or_destruction (tree, tree, bool);
78 static void generate_ctor_or_dtor_function (bool, int, location_t *);
79 static int generate_ctor_and_dtor_functions_for_priority (splay_tree_node,
81 static tree prune_vars_needing_no_initialization (tree *);
82 static void write_out_vars (tree);
83 static void import_export_class (tree);
84 static tree get_guard_bits (tree);
85 static void determine_visibility_from_class (tree, tree);
87 /* A list of static class variables. This is needed, because a
88 static class variable can be declared inside the class without
89 an initializer, and then initialized, statically, outside the class. */
90 static GTY(()) VEC(tree,gc) *pending_statics;
92 /* A list of functions which were declared inline, but which we
93 may need to emit outline anyway. */
94 static GTY(()) VEC(tree,gc) *deferred_fns;
96 /* Nonzero if we're done parsing and into end-of-file activities. */
100 /* Functions called along with real static constructors and destructors. */
107 /* Return a member function type (a METHOD_TYPE), given FNTYPE (a
108 FUNCTION_TYPE), CTYPE (class type), and QUALS (the cv-qualifiers
109 that apply to the function). */
112 build_memfn_type (tree fntype, tree ctype, cp_cv_quals quals)
117 if (fntype == error_mark_node || ctype == error_mark_node)
118 return error_mark_node;
120 type_quals = quals & ~TYPE_QUAL_RESTRICT;
121 ctype = cp_build_qualified_type (ctype, type_quals);
122 fntype = build_method_type_directly (ctype, TREE_TYPE (fntype),
123 (TREE_CODE (fntype) == METHOD_TYPE
124 ? TREE_CHAIN (TYPE_ARG_TYPES (fntype))
125 : TYPE_ARG_TYPES (fntype)));
126 raises = TYPE_RAISES_EXCEPTIONS (fntype);
128 fntype = build_exception_variant (fntype, raises);
133 /* Build a PARM_DECL with NAME and TYPE, and set DECL_ARG_TYPE
137 cp_build_parm_decl (tree name, tree type)
139 tree parm = build_decl (PARM_DECL, name, type);
140 /* DECL_ARG_TYPE is only used by the back end and the back end never
142 if (!processing_template_decl)
143 DECL_ARG_TYPE (parm) = type_passed_as (type);
147 /* Returns a PARM_DECL for a parameter of the indicated TYPE, with the
151 build_artificial_parm (tree name, tree type)
153 tree parm = cp_build_parm_decl (name, type);
154 DECL_ARTIFICIAL (parm) = 1;
155 /* All our artificial parms are implicitly `const'; they cannot be
157 TREE_READONLY (parm) = 1;
161 /* Constructors for types with virtual baseclasses need an "in-charge" flag
162 saying whether this constructor is responsible for initialization of
163 virtual baseclasses or not. All destructors also need this "in-charge"
164 flag, which additionally determines whether or not the destructor should
165 free the memory for the object.
167 This function adds the "in-charge" flag to member function FN if
168 appropriate. It is called from grokclassfn and tsubst.
169 FN must be either a constructor or destructor.
171 The in-charge flag follows the 'this' parameter, and is followed by the
172 VTT parm (if any), then the user-written parms. */
175 maybe_retrofit_in_chrg (tree fn)
177 tree basetype, arg_types, parms, parm, fntype;
179 /* If we've already add the in-charge parameter don't do it again. */
180 if (DECL_HAS_IN_CHARGE_PARM_P (fn))
183 /* When processing templates we can't know, in general, whether or
184 not we're going to have virtual baseclasses. */
185 if (processing_template_decl)
188 /* We don't need an in-charge parameter for constructors that don't
189 have virtual bases. */
190 if (DECL_CONSTRUCTOR_P (fn)
191 && !CLASSTYPE_VBASECLASSES (DECL_CONTEXT (fn)))
194 arg_types = TYPE_ARG_TYPES (TREE_TYPE (fn));
195 basetype = TREE_TYPE (TREE_VALUE (arg_types));
196 arg_types = TREE_CHAIN (arg_types);
198 parms = TREE_CHAIN (DECL_ARGUMENTS (fn));
200 /* If this is a subobject constructor or destructor, our caller will
201 pass us a pointer to our VTT. */
202 if (CLASSTYPE_VBASECLASSES (DECL_CONTEXT (fn)))
204 parm = build_artificial_parm (vtt_parm_identifier, vtt_parm_type);
206 /* First add it to DECL_ARGUMENTS between 'this' and the real args... */
207 TREE_CHAIN (parm) = parms;
210 /* ...and then to TYPE_ARG_TYPES. */
211 arg_types = hash_tree_chain (vtt_parm_type, arg_types);
213 DECL_HAS_VTT_PARM_P (fn) = 1;
216 /* Then add the in-charge parm (before the VTT parm). */
217 parm = build_artificial_parm (in_charge_identifier, integer_type_node);
218 TREE_CHAIN (parm) = parms;
220 arg_types = hash_tree_chain (integer_type_node, arg_types);
222 /* Insert our new parameter(s) into the list. */
223 TREE_CHAIN (DECL_ARGUMENTS (fn)) = parms;
225 /* And rebuild the function type. */
226 fntype = build_method_type_directly (basetype, TREE_TYPE (TREE_TYPE (fn)),
228 if (TYPE_RAISES_EXCEPTIONS (TREE_TYPE (fn)))
229 fntype = build_exception_variant (fntype,
230 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (fn)));
231 TREE_TYPE (fn) = fntype;
233 /* Now we've got the in-charge parameter. */
234 DECL_HAS_IN_CHARGE_PARM_P (fn) = 1;
237 /* Classes overload their constituent function names automatically.
238 When a function name is declared in a record structure,
239 its name is changed to it overloaded name. Since names for
240 constructors and destructors can conflict, we place a leading
243 CNAME is the name of the class we are grokking for.
245 FUNCTION is a FUNCTION_DECL. It was created by `grokdeclarator'.
247 FLAGS contains bits saying what's special about today's
248 arguments. 1 == DESTRUCTOR. 2 == OPERATOR.
250 If FUNCTION is a destructor, then we must add the `auto-delete' field
251 as a second parameter. There is some hair associated with the fact
252 that we must "declare" this variable in the manner consistent with the
253 way the rest of the arguments were declared.
255 QUALS are the qualifiers for the this pointer. */
258 grokclassfn (tree ctype, tree function, enum overload_flags flags)
260 tree fn_name = DECL_NAME (function);
262 /* Even within an `extern "C"' block, members get C++ linkage. See
263 [dcl.link] for details. */
264 SET_DECL_LANGUAGE (function, lang_cplusplus);
266 if (fn_name == NULL_TREE)
268 error ("name missing for member function");
269 fn_name = get_identifier ("<anonymous>");
270 DECL_NAME (function) = fn_name;
273 DECL_CONTEXT (function) = ctype;
275 if (flags == DTOR_FLAG)
276 DECL_DESTRUCTOR_P (function) = 1;
278 if (flags == DTOR_FLAG || DECL_CONSTRUCTOR_P (function))
279 maybe_retrofit_in_chrg (function);
282 /* Create an ARRAY_REF, checking for the user doing things backwards
286 grok_array_decl (tree array_expr, tree index_exp)
290 tree orig_array_expr = array_expr;
291 tree orig_index_exp = index_exp;
293 if (error_operand_p (array_expr) || error_operand_p (index_exp))
294 return error_mark_node;
296 if (processing_template_decl)
298 if (type_dependent_expression_p (array_expr)
299 || type_dependent_expression_p (index_exp))
300 return build_min_nt (ARRAY_REF, array_expr, index_exp,
301 NULL_TREE, NULL_TREE);
302 array_expr = build_non_dependent_expr (array_expr);
303 index_exp = build_non_dependent_expr (index_exp);
306 type = TREE_TYPE (array_expr);
308 type = non_reference (type);
310 /* If they have an `operator[]', use that. */
311 if (IS_AGGR_TYPE (type) || IS_AGGR_TYPE (TREE_TYPE (index_exp)))
312 expr = build_new_op (ARRAY_REF, LOOKUP_NORMAL,
313 array_expr, index_exp, NULL_TREE,
314 /*overloaded_p=*/NULL);
319 /* Otherwise, create an ARRAY_REF for a pointer or array type.
320 It is a little-known fact that, if `a' is an array and `i' is
321 an int, you can write `i[a]', which means the same thing as
323 if (TREE_CODE (type) == ARRAY_TYPE)
326 p1 = build_expr_type_conversion (WANT_POINTER, array_expr, false);
328 if (TREE_CODE (TREE_TYPE (index_exp)) == ARRAY_TYPE)
331 p2 = build_expr_type_conversion (WANT_POINTER, index_exp, false);
333 i1 = build_expr_type_conversion (WANT_INT | WANT_ENUM, array_expr,
335 i2 = build_expr_type_conversion (WANT_INT | WANT_ENUM, index_exp,
338 if ((p1 && i2) && (i1 && p2))
339 error ("ambiguous conversion for array subscript");
342 array_expr = p1, index_exp = i2;
344 array_expr = p2, index_exp = i1;
347 error ("invalid types %<%T[%T]%> for array subscript",
348 type, TREE_TYPE (index_exp));
349 return error_mark_node;
352 if (array_expr == error_mark_node || index_exp == error_mark_node)
353 error ("ambiguous conversion for array subscript");
355 expr = build_array_ref (array_expr, index_exp);
357 if (processing_template_decl && expr != error_mark_node)
358 return build_min_non_dep (ARRAY_REF, expr, orig_array_expr, orig_index_exp,
359 NULL_TREE, NULL_TREE);
363 /* Given the cast expression EXP, checking out its validity. Either return
364 an error_mark_node if there was an unavoidable error, return a cast to
365 void for trying to delete a pointer w/ the value 0, or return the
366 call to delete. If DOING_VEC is true, we handle things differently
367 for doing an array delete.
368 Implements ARM $5.3.4. This is called from the parser. */
371 delete_sanity (tree exp, tree size, bool doing_vec, int use_global_delete)
375 if (exp == error_mark_node)
378 if (processing_template_decl)
380 t = build_min (DELETE_EXPR, void_type_node, exp, size);
381 DELETE_EXPR_USE_GLOBAL (t) = use_global_delete;
382 DELETE_EXPR_USE_VEC (t) = doing_vec;
383 TREE_SIDE_EFFECTS (t) = 1;
387 /* An array can't have been allocated by new, so complain. */
388 if (TREE_CODE (exp) == VAR_DECL
389 && TREE_CODE (TREE_TYPE (exp)) == ARRAY_TYPE)
390 warning (0, "deleting array %q#D", exp);
392 t = build_expr_type_conversion (WANT_POINTER, exp, true);
394 if (t == NULL_TREE || t == error_mark_node)
396 error ("type %q#T argument given to %<delete%>, expected pointer",
398 return error_mark_node;
401 type = TREE_TYPE (t);
403 /* As of Valley Forge, you can delete a pointer to const. */
405 /* You can't delete functions. */
406 if (TREE_CODE (TREE_TYPE (type)) == FUNCTION_TYPE)
408 error ("cannot delete a function. Only pointer-to-objects are "
409 "valid arguments to %<delete%>");
410 return error_mark_node;
413 /* Deleting ptr to void is undefined behavior [expr.delete/3]. */
414 if (TREE_CODE (TREE_TYPE (type)) == VOID_TYPE)
416 warning (0, "deleting %qT is undefined", type);
420 /* Deleting a pointer with the value zero is valid and has no effect. */
421 if (integer_zerop (t))
422 return build1 (NOP_EXPR, void_type_node, t);
425 return build_vec_delete (t, /*maxindex=*/NULL_TREE,
426 sfk_deleting_destructor,
429 return build_delete (type, t, sfk_deleting_destructor,
430 LOOKUP_NORMAL, use_global_delete);
433 /* Report an error if the indicated template declaration is not the
434 sort of thing that should be a member template. */
437 check_member_template (tree tmpl)
441 gcc_assert (TREE_CODE (tmpl) == TEMPLATE_DECL);
442 decl = DECL_TEMPLATE_RESULT (tmpl);
444 if (TREE_CODE (decl) == FUNCTION_DECL
445 || (TREE_CODE (decl) == TYPE_DECL
446 && IS_AGGR_TYPE (TREE_TYPE (decl))))
448 if (current_function_decl)
449 /* 14.5.2.2 [temp.mem]
451 A local class shall not have member templates. */
452 error ("invalid declaration of member template %q#D in local class",
455 /* The parser rejects any use of virtual in a function template. */
456 gcc_assert (!(TREE_CODE (decl) == FUNCTION_DECL
457 && DECL_VIRTUAL_P (decl)));
459 /* The debug-information generating code doesn't know what to do
460 with member templates. */
461 DECL_IGNORED_P (tmpl) = 1;
464 error ("template declaration of %q#D", decl);
467 /* Return true iff TYPE is a valid Java parameter or return type. */
470 acceptable_java_type (tree type)
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 error ("Java method %qD has non-Java parameter type %qT",
537 /* Sanity check: report error if this function FUNCTION is not
538 really a member of the class (CTYPE) it is supposed to belong to.
539 TEMPLATE_PARMS is used to specify the template parameters of a member
540 template passed as FUNCTION_DECL. If the member template is passed as a
541 TEMPLATE_DECL, it can be NULL since the parameters can be extracted
542 from the declaration. If the function is not a function template, it
544 It returns the original declaration for the function, or NULL_TREE
545 if no declaration was found (and an error was emitted). */
548 check_classfn (tree ctype, tree function, tree template_parms)
553 if (DECL_USE_TEMPLATE (function)
554 && !(TREE_CODE (function) == TEMPLATE_DECL
555 && DECL_TEMPLATE_SPECIALIZATION (function))
556 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (function)))
557 /* Since this is a specialization of a member template,
558 we're not going to find the declaration in the class.
561 struct S { template <typename T> void f(T); };
562 template <> void S::f(int);
564 we're not going to find `S::f(int)', but there's no
565 reason we should, either. We let our callers know we didn't
566 find the method, but we don't complain. */
569 /* Basic sanity check: for a template function, the template parameters
570 either were not passed, or they are the same of DECL_TEMPLATE_PARMS. */
571 if (TREE_CODE (function) == TEMPLATE_DECL)
573 gcc_assert (!template_parms
574 || comp_template_parms (template_parms,
575 DECL_TEMPLATE_PARMS (function)));
576 template_parms = DECL_TEMPLATE_PARMS (function);
579 /* OK, is this a definition of a member template? */
580 is_template = (template_parms != NULL_TREE);
582 ix = class_method_index_for_fn (complete_type (ctype), function);
585 VEC(tree,gc) *methods = CLASSTYPE_METHOD_VEC (ctype);
586 tree fndecls, fndecl = 0;
589 const char *format = NULL;
591 pushed_scope = push_scope (ctype);
592 for (fndecls = VEC_index (tree, methods, ix);
593 fndecls; fndecls = OVL_NEXT (fndecls))
597 fndecl = OVL_CURRENT (fndecls);
598 p1 = TYPE_ARG_TYPES (TREE_TYPE (function));
599 p2 = TYPE_ARG_TYPES (TREE_TYPE (fndecl));
601 /* We cannot simply call decls_match because this doesn't
602 work for static member functions that are pretending to
603 be methods, and because the name may have been changed by
606 /* Get rid of the this parameter on functions that become
608 if (DECL_STATIC_FUNCTION_P (fndecl)
609 && TREE_CODE (TREE_TYPE (function)) == METHOD_TYPE)
610 p1 = TREE_CHAIN (p1);
612 /* A member template definition only matches a member template
614 if (is_template != (TREE_CODE (fndecl) == TEMPLATE_DECL))
617 if (same_type_p (TREE_TYPE (TREE_TYPE (function)),
618 TREE_TYPE (TREE_TYPE (fndecl)))
619 && compparms (p1, p2)
621 || comp_template_parms (template_parms,
622 DECL_TEMPLATE_PARMS (fndecl)))
623 && (DECL_TEMPLATE_SPECIALIZATION (function)
624 == DECL_TEMPLATE_SPECIALIZATION (fndecl))
625 && (!DECL_TEMPLATE_SPECIALIZATION (function)
626 || (DECL_TI_TEMPLATE (function)
627 == DECL_TI_TEMPLATE (fndecl))))
631 pop_scope (pushed_scope);
633 return OVL_CURRENT (fndecls);
634 error ("prototype for %q#D does not match any in class %qT",
636 is_conv_op = DECL_CONV_FN_P (fndecl);
639 ix = CLASSTYPE_FIRST_CONVERSION_SLOT;
640 fndecls = VEC_index (tree, methods, ix);
643 fndecl = OVL_CURRENT (fndecls);
644 fndecls = OVL_NEXT (fndecls);
646 if (!fndecls && is_conv_op)
648 if (VEC_length (tree, methods) > (size_t) ++ix)
650 fndecls = VEC_index (tree, methods, ix);
651 if (!DECL_CONV_FN_P (OVL_CURRENT (fndecls)))
663 format = N_("candidates are: %+#D");
665 format = N_("candidate is: %+#D");
666 error (format, fndecl);
669 else if (!COMPLETE_TYPE_P (ctype))
670 cxx_incomplete_type_error (function, ctype);
672 error ("no %q#D member function declared in class %qT",
675 /* If we did not find the method in the class, add it to avoid
676 spurious errors (unless the CTYPE is not yet defined, in which
677 case we'll only confuse ourselves when the function is declared
678 properly within the class. */
679 if (COMPLETE_TYPE_P (ctype))
680 add_method (ctype, function, NULL_TREE);
684 /* DECL is a function with vague linkage. Remember it so that at the
685 end of the translation unit we can decide whether or not to emit
689 note_vague_linkage_fn (tree decl)
691 if (!DECL_DEFERRED_FN (decl))
693 DECL_DEFERRED_FN (decl) = 1;
694 DECL_DEFER_OUTPUT (decl) = 1;
695 VEC_safe_push (tree, gc, deferred_fns, decl);
699 /* Like note_vague_linkage_fn but for variables. */
702 note_vague_linkage_var (tree var)
704 VEC_safe_push (tree, gc, pending_statics, var);
707 /* We have just processed the DECL, which is a static data member.
708 The other parameters are as for cp_finish_decl. */
711 finish_static_data_member_decl (tree decl,
712 tree init, bool init_const_expr_p,
716 gcc_assert (TREE_PUBLIC (decl));
718 DECL_CONTEXT (decl) = current_class_type;
720 /* We cannot call pushdecl here, because that would fill in the
721 TREE_CHAIN of our decl. Instead, we modify cp_finish_decl to do
722 the right thing, namely, to put this decl out straight away. */
724 if (! processing_template_decl)
725 note_vague_linkage_var (decl);
727 if (LOCAL_CLASS_P (current_class_type))
728 pedwarn ("local class %q#T shall not have static data member %q#D",
729 current_class_type, decl);
731 /* Static consts need not be initialized in the class definition. */
732 if (init != NULL_TREE && TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl)))
734 static int explained = 0;
736 error ("initializer invalid for static member with constructor");
739 error ("(an out of class initialization is required)");
744 /* Force the compiler to know when an uninitialized static const
745 member is being used. */
746 if (CP_TYPE_CONST_P (TREE_TYPE (decl)) && init == 0)
747 TREE_USED (decl) = 1;
748 DECL_INITIAL (decl) = init;
749 DECL_IN_AGGR_P (decl) = 1;
751 cp_finish_decl (decl, init, init_const_expr_p, asmspec_tree, flags);
754 /* DECLARATOR and DECLSPECS correspond to a class member. The other
755 parameters are as for cp_finish_decl. Return the DECL for the
756 class member declared. */
759 grokfield (const cp_declarator *declarator,
760 cp_decl_specifier_seq *declspecs,
761 tree init, bool init_const_expr_p,
766 const char *asmspec = 0;
767 int flags = LOOKUP_ONLYCONVERTING;
769 if (!declspecs->any_specifiers_p
770 && declarator->kind == cdk_id
771 && declarator->u.id.qualifying_scope
772 && TREE_CODE (declarator->u.id.unqualified_name) == IDENTIFIER_NODE)
773 /* Access declaration */
774 return do_class_using_decl (declarator->u.id.qualifying_scope,
775 declarator->u.id.unqualified_name);
778 && TREE_CODE (init) == TREE_LIST
779 && TREE_VALUE (init) == error_mark_node
780 && TREE_CHAIN (init) == NULL_TREE)
783 value = grokdeclarator (declarator, declspecs, FIELD, init != 0, &attrlist);
784 if (! value || error_operand_p (value))
785 /* friend or constructor went bad. */
786 return error_mark_node;
788 if (TREE_CODE (value) == TYPE_DECL && init)
790 error ("typedef %qD is initialized (use __typeof__ instead)", value);
794 /* Pass friendly classes back. */
795 if (value == void_type_node)
798 /* Pass friend decls back. */
799 if ((TREE_CODE (value) == FUNCTION_DECL
800 || TREE_CODE (value) == TEMPLATE_DECL)
801 && DECL_CONTEXT (value) != current_class_type)
804 if (DECL_NAME (value) != NULL_TREE
805 && IDENTIFIER_POINTER (DECL_NAME (value))[0] == '_'
806 && ! strcmp (IDENTIFIER_POINTER (DECL_NAME (value)), "_vptr"))
807 error ("member %qD conflicts with virtual function table field name",
810 /* Stash away type declarations. */
811 if (TREE_CODE (value) == TYPE_DECL)
813 DECL_NONLOCAL (value) = 1;
814 DECL_CONTEXT (value) = current_class_type;
816 if (processing_template_decl)
817 value = push_template_decl (value);
821 /* Avoid storing attributes in template parameters:
822 tsubst is not ready to handle them. */
823 tree type = TREE_TYPE (value);
824 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM
825 || TREE_CODE (type) == BOUND_TEMPLATE_TEMPLATE_PARM)
826 sorry ("applying attributes to template parameters is not implemented");
828 cplus_decl_attributes (&value, attrlist, 0);
834 if (DECL_IN_AGGR_P (value))
836 error ("%qD is already defined in %qT", value, DECL_CONTEXT (value));
837 return void_type_node;
841 asmspec = TREE_STRING_POINTER (asmspec_tree);
845 if (TREE_CODE (value) == FUNCTION_DECL)
847 /* Initializers for functions are rejected early in the parser.
848 If we get here, it must be a pure specifier for a method. */
849 if (TREE_CODE (TREE_TYPE (value)) == METHOD_TYPE)
851 gcc_assert (error_operand_p (init) || integer_zerop (init));
852 DECL_PURE_VIRTUAL_P (value) = 1;
856 gcc_assert (TREE_CODE (TREE_TYPE (value)) == FUNCTION_TYPE);
857 error ("initializer specified for static member function %qD",
861 else if (pedantic && TREE_CODE (value) != VAR_DECL)
862 /* Already complained in grokdeclarator. */
864 else if (!processing_template_decl)
866 if (TREE_CODE (init) == CONSTRUCTOR)
867 init = digest_init (TREE_TYPE (value), init);
869 init = integral_constant_value (init);
871 if (init != error_mark_node && !TREE_CONSTANT (init))
873 /* We can allow references to things that are effectively
874 static, since references are initialized with the
876 if (TREE_CODE (TREE_TYPE (value)) != REFERENCE_TYPE
877 || (TREE_STATIC (init) == 0
878 && (!DECL_P (init) || DECL_EXTERNAL (init) == 0)))
880 error ("field initializer is not constant");
881 init = error_mark_node;
887 if (processing_template_decl
888 && (TREE_CODE (value) == VAR_DECL || TREE_CODE (value) == FUNCTION_DECL))
890 value = push_template_decl (value);
891 if (error_operand_p (value))
892 return error_mark_node;
896 cplus_decl_attributes (&value, attrlist, 0);
898 switch (TREE_CODE (value))
901 finish_static_data_member_decl (value, init, init_const_expr_p,
902 asmspec_tree, flags);
907 error ("%<asm%> specifiers are not permitted on non-static data members");
908 if (DECL_INITIAL (value) == error_mark_node)
909 init = error_mark_node;
910 cp_finish_decl (value, init, /*init_const_expr_p=*/false,
912 DECL_INITIAL (value) = init;
913 DECL_IN_AGGR_P (value) = 1;
918 set_user_assembler_name (value, asmspec);
920 cp_finish_decl (value,
922 /*init_const_expr_p=*/false,
923 asmspec_tree, flags);
925 /* Pass friends back this way. */
926 if (DECL_FRIEND_P (value))
927 return void_type_node;
929 DECL_IN_AGGR_P (value) = 1;
938 /* Like `grokfield', but for bitfields.
939 WIDTH is non-NULL for bit fields only, and is an INTEGER_CST node. */
942 grokbitfield (const cp_declarator *declarator,
943 cp_decl_specifier_seq *declspecs, tree width)
945 tree value = grokdeclarator (declarator, declspecs, BITFIELD, 0, NULL);
947 if (! value) return NULL_TREE; /* friends went bad. */
949 /* Pass friendly classes back. */
950 if (TREE_CODE (value) == VOID_TYPE)
951 return void_type_node;
953 if (TREE_CODE (value) == TYPE_DECL)
955 error ("cannot declare %qD to be a bit-field type", value);
959 /* Usually, finish_struct_1 catches bitfields with invalid types.
960 But, in the case of bitfields with function type, we confuse
961 ourselves into thinking they are member functions, so we must
963 if (TREE_CODE (value) == FUNCTION_DECL)
965 error ("cannot declare bit-field %qD with function type",
970 if (DECL_IN_AGGR_P (value))
972 error ("%qD is already defined in the class %qT", value,
973 DECL_CONTEXT (value));
974 return void_type_node;
977 if (TREE_STATIC (value))
979 error ("static member %qD cannot be a bit-field", value);
982 finish_decl (value, NULL_TREE, NULL_TREE);
984 if (width != error_mark_node)
986 constant_expression_warning (width);
987 DECL_INITIAL (value) = width;
988 SET_DECL_C_BIT_FIELD (value);
991 DECL_IN_AGGR_P (value) = 1;
997 cplus_decl_attributes (tree *decl, tree attributes, int flags)
999 if (*decl == NULL_TREE || *decl == void_type_node)
1002 if (TREE_CODE (*decl) == TEMPLATE_DECL)
1003 decl = &DECL_TEMPLATE_RESULT (*decl);
1005 decl_attributes (decl, attributes, flags);
1007 if (TREE_CODE (*decl) == TYPE_DECL)
1008 SET_IDENTIFIER_TYPE_VALUE (DECL_NAME (*decl), TREE_TYPE (*decl));
1011 /* Walks through the namespace- or function-scope anonymous union
1012 OBJECT, with the indicated TYPE, building appropriate VAR_DECLs.
1013 Returns one of the fields for use in the mangled name. */
1016 build_anon_union_vars (tree type, tree object)
1018 tree main_decl = NULL_TREE;
1021 /* Rather than write the code to handle the non-union case,
1022 just give an error. */
1023 if (TREE_CODE (type) != UNION_TYPE)
1024 error ("anonymous struct not inside named type");
1026 for (field = TYPE_FIELDS (type);
1028 field = TREE_CHAIN (field))
1033 if (DECL_ARTIFICIAL (field))
1035 if (TREE_CODE (field) != FIELD_DECL)
1037 pedwarn ("%q+#D invalid; an anonymous union can only "
1038 "have non-static data members", field);
1042 if (TREE_PRIVATE (field))
1043 pedwarn ("private member %q+#D in anonymous union", field);
1044 else if (TREE_PROTECTED (field))
1045 pedwarn ("protected member %q+#D in anonymous union", field);
1047 if (processing_template_decl)
1048 ref = build_min_nt (COMPONENT_REF, object,
1049 DECL_NAME (field), NULL_TREE);
1051 ref = build_class_member_access_expr (object, field, NULL_TREE,
1054 if (DECL_NAME (field))
1058 decl = build_decl (VAR_DECL, DECL_NAME (field), TREE_TYPE (field));
1060 base = get_base_address (object);
1061 TREE_PUBLIC (decl) = TREE_PUBLIC (base);
1062 TREE_STATIC (decl) = TREE_STATIC (base);
1063 DECL_EXTERNAL (decl) = DECL_EXTERNAL (base);
1065 SET_DECL_VALUE_EXPR (decl, ref);
1066 DECL_HAS_VALUE_EXPR_P (decl) = 1;
1068 decl = pushdecl (decl);
1070 else if (ANON_AGGR_TYPE_P (TREE_TYPE (field)))
1071 decl = build_anon_union_vars (TREE_TYPE (field), ref);
1075 if (main_decl == NULL_TREE)
1082 /* Finish off the processing of a UNION_TYPE structure. If the union is an
1083 anonymous union, then all members must be laid out together. PUBLIC_P
1084 is nonzero if this union is not declared static. */
1087 finish_anon_union (tree anon_union_decl)
1093 if (anon_union_decl == error_mark_node)
1096 type = TREE_TYPE (anon_union_decl);
1097 public_p = TREE_PUBLIC (anon_union_decl);
1099 /* The VAR_DECL's context is the same as the TYPE's context. */
1100 DECL_CONTEXT (anon_union_decl) = DECL_CONTEXT (TYPE_NAME (type));
1102 if (TYPE_FIELDS (type) == NULL_TREE)
1107 error ("namespace-scope anonymous aggregates must be static");
1111 main_decl = build_anon_union_vars (type, anon_union_decl);
1112 if (main_decl == NULL_TREE)
1114 warning (0, "anonymous union with no members");
1118 if (!processing_template_decl)
1120 /* Use main_decl to set the mangled name. */
1121 DECL_NAME (anon_union_decl) = DECL_NAME (main_decl);
1122 mangle_decl (anon_union_decl);
1123 DECL_NAME (anon_union_decl) = NULL_TREE;
1126 pushdecl (anon_union_decl);
1127 if (building_stmt_tree ()
1128 && at_function_scope_p ())
1129 add_decl_expr (anon_union_decl);
1130 else if (!processing_template_decl)
1131 rest_of_decl_compilation (anon_union_decl,
1132 toplevel_bindings_p (), at_eof);
1135 /* Auxiliary functions to make type signatures for
1136 `operator new' and `operator delete' correspond to
1137 what compiler will be expecting. */
1140 coerce_new_type (tree type)
1143 tree args = TYPE_ARG_TYPES (type);
1145 gcc_assert (TREE_CODE (type) == FUNCTION_TYPE);
1147 if (!same_type_p (TREE_TYPE (type), ptr_type_node))
1150 error ("%<operator new%> must return type %qT", ptr_type_node);
1153 if (!args || args == void_list_node
1154 || !same_type_p (TREE_VALUE (args), size_type_node))
1157 if (args && args != void_list_node)
1158 args = TREE_CHAIN (args);
1159 pedwarn ("%<operator new%> takes type %<size_t%> (%qT) "
1160 "as first parameter", size_type_node);
1165 args = tree_cons (NULL_TREE, size_type_node, args);
1168 type = build_exception_variant
1169 (build_function_type (ptr_type_node, args),
1170 TYPE_RAISES_EXCEPTIONS (type));
1178 coerce_delete_type (tree type)
1181 tree args = TYPE_ARG_TYPES (type);
1183 gcc_assert (TREE_CODE (type) == FUNCTION_TYPE);
1185 if (!same_type_p (TREE_TYPE (type), void_type_node))
1188 error ("%<operator delete%> must return type %qT", void_type_node);
1191 if (!args || args == void_list_node
1192 || !same_type_p (TREE_VALUE (args), ptr_type_node))
1195 if (args && args != void_list_node)
1196 args = TREE_CHAIN (args);
1197 error ("%<operator delete%> takes type %qT as first parameter",
1203 args = tree_cons (NULL_TREE, ptr_type_node, args);
1206 type = build_exception_variant
1207 (build_function_type (void_type_node, args),
1208 TYPE_RAISES_EXCEPTIONS (type));
1217 mark_vtable_entries (tree decl)
1220 unsigned HOST_WIDE_INT idx;
1222 FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (DECL_INITIAL (decl)),
1227 STRIP_NOPS (fnaddr);
1229 if (TREE_CODE (fnaddr) != ADDR_EXPR
1230 && TREE_CODE (fnaddr) != FDESC_EXPR)
1231 /* This entry is an offset: a virtual base class offset, a
1232 virtual call offset, an RTTI offset, etc. */
1235 fn = TREE_OPERAND (fnaddr, 0);
1236 TREE_ADDRESSABLE (fn) = 1;
1237 /* When we don't have vcall offsets, we output thunks whenever
1238 we output the vtables that contain them. With vcall offsets,
1239 we know all the thunks we'll need when we emit a virtual
1240 function, so we emit the thunks there instead. */
1241 if (DECL_THUNK_P (fn))
1242 use_thunk (fn, /*emit_p=*/0);
1247 /* Set DECL up to have the closest approximation of "initialized common"
1248 linkage available. */
1251 comdat_linkage (tree decl)
1254 make_decl_one_only (decl);
1255 else if (TREE_CODE (decl) == FUNCTION_DECL
1256 || (TREE_CODE (decl) == VAR_DECL && DECL_ARTIFICIAL (decl)))
1257 /* We can just emit function and compiler-generated variables
1258 statically; having multiple copies is (for the most part) only
1261 There are two correctness issues, however: the address of a
1262 template instantiation with external linkage should be the
1263 same, independent of what translation unit asks for the
1264 address, and this will not hold when we emit multiple copies of
1265 the function. However, there's little else we can do.
1267 Also, by default, the typeinfo implementation assumes that
1268 there will be only one copy of the string used as the name for
1269 each type. Therefore, if weak symbols are unavailable, the
1270 run-time library should perform a more conservative check; it
1271 should perform a string comparison, rather than an address
1273 TREE_PUBLIC (decl) = 0;
1276 /* Static data member template instantiations, however, cannot
1277 have multiple copies. */
1278 if (DECL_INITIAL (decl) == 0
1279 || DECL_INITIAL (decl) == error_mark_node)
1280 DECL_COMMON (decl) = 1;
1281 else if (EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl)))
1283 DECL_COMMON (decl) = 1;
1284 DECL_INITIAL (decl) = error_mark_node;
1286 else if (!DECL_EXPLICIT_INSTANTIATION (decl))
1288 /* We can't do anything useful; leave vars for explicit
1290 DECL_EXTERNAL (decl) = 1;
1291 DECL_NOT_REALLY_EXTERN (decl) = 0;
1295 if (DECL_LANG_SPECIFIC (decl))
1296 DECL_COMDAT (decl) = 1;
1299 /* For win32 we also want to put explicit instantiations in
1300 linkonce sections, so that they will be merged with implicit
1301 instantiations; otherwise we get duplicate symbol errors.
1302 For Darwin we do not want explicit instantiations to be
1306 maybe_make_one_only (tree decl)
1308 /* We used to say that this was not necessary on targets that support weak
1309 symbols, because the implicit instantiations will defer to the explicit
1310 one. However, that's not actually the case in SVR4; a strong definition
1311 after a weak one is an error. Also, not making explicit
1312 instantiations one_only means that we can end up with two copies of
1313 some template instantiations. */
1317 /* We can't set DECL_COMDAT on functions, or cp_finish_file will think
1318 we can get away with not emitting them if they aren't used. We need
1319 to for variables so that cp_finish_decl will update their linkage,
1320 because their DECL_INITIAL may not have been set properly yet. */
1322 if (!TARGET_WEAK_NOT_IN_ARCHIVE_TOC
1323 || (! DECL_EXPLICIT_INSTANTIATION (decl)
1324 && ! DECL_TEMPLATE_SPECIALIZATION (decl)))
1326 make_decl_one_only (decl);
1328 if (TREE_CODE (decl) == VAR_DECL)
1330 DECL_COMDAT (decl) = 1;
1331 /* Mark it needed so we don't forget to emit it. */
1332 mark_decl_referenced (decl);
1337 /* Determine whether or not we want to specifically import or export CTYPE,
1338 using various heuristics. */
1341 import_export_class (tree ctype)
1343 /* -1 for imported, 1 for exported. */
1344 int import_export = 0;
1346 /* It only makes sense to call this function at EOF. The reason is
1347 that this function looks at whether or not the first non-inline
1348 non-abstract virtual member function has been defined in this
1349 translation unit. But, we can't possibly know that until we've
1350 seen the entire translation unit. */
1351 gcc_assert (at_eof);
1353 if (CLASSTYPE_INTERFACE_KNOWN (ctype))
1356 /* If MULTIPLE_SYMBOL_SPACES is set and we saw a #pragma interface,
1357 we will have CLASSTYPE_INTERFACE_ONLY set but not
1358 CLASSTYPE_INTERFACE_KNOWN. In that case, we don't want to use this
1359 heuristic because someone will supply a #pragma implementation
1360 elsewhere, and deducing it here would produce a conflict. */
1361 if (CLASSTYPE_INTERFACE_ONLY (ctype))
1364 if (lookup_attribute ("dllimport", TYPE_ATTRIBUTES (ctype)))
1366 else if (lookup_attribute ("dllexport", TYPE_ATTRIBUTES (ctype)))
1368 else if (CLASSTYPE_IMPLICIT_INSTANTIATION (ctype)
1369 && !flag_implicit_templates)
1370 /* For a template class, without -fimplicit-templates, check the
1371 repository. If the virtual table is assigned to this
1372 translation unit, then export the class; otherwise, import
1374 import_export = repo_export_class_p (ctype) ? 1 : -1;
1375 else if (TYPE_POLYMORPHIC_P (ctype))
1377 /* The ABI specifies that the virtual table and associated
1378 information are emitted with the key method, if any. */
1379 tree method = CLASSTYPE_KEY_METHOD (ctype);
1380 /* If weak symbol support is not available, then we must be
1381 careful not to emit the vtable when the key function is
1382 inline. An inline function can be defined in multiple
1383 translation units. If we were to emit the vtable in each
1384 translation unit containing a definition, we would get
1385 multiple definition errors at link-time. */
1386 if (method && (flag_weak || ! DECL_DECLARED_INLINE_P (method)))
1387 import_export = (DECL_REALLY_EXTERN (method) ? -1 : 1);
1390 /* When MULTIPLE_SYMBOL_SPACES is set, we cannot count on seeing
1391 a definition anywhere else. */
1392 if (MULTIPLE_SYMBOL_SPACES && import_export == -1)
1395 /* Allow backends the chance to overrule the decision. */
1396 if (targetm.cxx.import_export_class)
1397 import_export = targetm.cxx.import_export_class (ctype, import_export);
1401 SET_CLASSTYPE_INTERFACE_KNOWN (ctype);
1402 CLASSTYPE_INTERFACE_ONLY (ctype) = (import_export < 0);
1406 /* Return true if VAR has already been provided to the back end; in that
1407 case VAR should not be modified further by the front end. */
1409 var_finalized_p (tree var)
1411 return cgraph_varpool_node (var)->finalized;
1414 /* DECL is a VAR_DECL or FUNCTION_DECL which, for whatever reason,
1415 must be emitted in this translation unit. Mark it as such. */
1418 mark_needed (tree decl)
1420 /* It's possible that we no longer need to set
1421 TREE_SYMBOL_REFERENCED here directly, but doing so is
1423 TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl)) = 1;
1424 mark_decl_referenced (decl);
1427 /* DECL is either a FUNCTION_DECL or a VAR_DECL. This function
1428 returns true if a definition of this entity should be provided in
1429 this object file. Callers use this function to determine whether
1430 or not to let the back end know that a definition of DECL is
1431 available in this translation unit. */
1434 decl_needed_p (tree decl)
1436 gcc_assert (TREE_CODE (decl) == VAR_DECL
1437 || TREE_CODE (decl) == FUNCTION_DECL);
1438 /* This function should only be called at the end of the translation
1439 unit. We cannot be sure of whether or not something will be
1440 COMDAT until that point. */
1441 gcc_assert (at_eof);
1443 /* All entities with external linkage that are not COMDAT should be
1444 emitted; they may be referred to from other object files. */
1445 if (TREE_PUBLIC (decl) && !DECL_COMDAT (decl))
1447 /* If this entity was used, let the back-end see it; it will decide
1448 whether or not to emit it into the object file. */
1449 if (TREE_USED (decl)
1450 || (DECL_ASSEMBLER_NAME_SET_P (decl)
1451 && TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl))))
1453 /* Otherwise, DECL does not need to be emitted -- yet. A subsequent
1454 reference to DECL might cause it to be emitted later. */
1458 /* If necessary, write out the vtables for the dynamic class CTYPE.
1459 Returns true if any vtables were emitted. */
1462 maybe_emit_vtables (tree ctype)
1468 /* If the vtables for this class have already been emitted there is
1469 nothing more to do. */
1470 primary_vtbl = CLASSTYPE_VTABLES (ctype);
1471 if (var_finalized_p (primary_vtbl))
1473 /* Ignore dummy vtables made by get_vtable_decl. */
1474 if (TREE_TYPE (primary_vtbl) == void_type_node)
1477 /* On some targets, we cannot determine the key method until the end
1478 of the translation unit -- which is when this function is
1480 if (!targetm.cxx.key_method_may_be_inline ())
1481 determine_key_method (ctype);
1483 /* See if any of the vtables are needed. */
1484 for (vtbl = CLASSTYPE_VTABLES (ctype); vtbl; vtbl = TREE_CHAIN (vtbl))
1486 import_export_decl (vtbl);
1487 if (DECL_NOT_REALLY_EXTERN (vtbl) && decl_needed_p (vtbl))
1492 /* If the references to this class' vtables are optimized away,
1493 still emit the appropriate debugging information. See
1495 if (DECL_COMDAT (primary_vtbl)
1496 && CLASSTYPE_DEBUG_REQUESTED (ctype))
1497 note_debug_info_needed (ctype);
1501 /* The ABI requires that we emit all of the vtables if we emit any
1503 for (vtbl = CLASSTYPE_VTABLES (ctype); vtbl; vtbl = TREE_CHAIN (vtbl))
1505 /* Mark entities references from the virtual table as used. */
1506 mark_vtable_entries (vtbl);
1508 if (TREE_TYPE (DECL_INITIAL (vtbl)) == 0)
1510 tree expr = store_init_value (vtbl, DECL_INITIAL (vtbl));
1512 /* It had better be all done at compile-time. */
1517 DECL_EXTERNAL (vtbl) = 0;
1518 rest_of_decl_compilation (vtbl, 1, 1);
1520 /* Because we're only doing syntax-checking, we'll never end up
1521 actually marking the variable as written. */
1522 if (flag_syntax_only)
1523 TREE_ASM_WRITTEN (vtbl) = 1;
1526 /* Since we're writing out the vtable here, also write the debug
1528 note_debug_info_needed (ctype);
1533 /* Like c_determine_visibility, but with additional C++-specific
1536 Function-scope entities can rely on the function's visibility because
1537 it is set in start_preparsed_function.
1539 Class-scope entities cannot rely on the class's visibility until the end
1540 of the enclosing class definition.
1542 Note that because namespaces have multiple independent definitions,
1543 namespace visibility is handled elsewhere using the #pragma visibility
1544 machinery rather than by decorating the namespace declaration. */
1547 determine_visibility (tree decl)
1551 /* Only relevant for names with external linkage. */
1552 if (!TREE_PUBLIC (decl))
1555 /* Cloned constructors and destructors get the same visibility as
1556 the underlying function. That should be set up in
1557 maybe_clone_body. */
1558 gcc_assert (!DECL_CLONED_FUNCTION_P (decl));
1560 /* Give the common code a chance to make a determination. */
1561 if (c_determine_visibility (decl))
1564 /* If DECL is a member of a class, visibility specifiers on the
1565 class can influence the visibility of the DECL. */
1566 if (DECL_CLASS_SCOPE_P (decl))
1567 class_type = DECL_CONTEXT (decl);
1568 else if (TREE_CODE (decl) == VAR_DECL
1569 && DECL_TINFO_P (decl)
1570 && CLASS_TYPE_P (TREE_TYPE (DECL_NAME (decl))))
1571 class_type = TREE_TYPE (DECL_NAME (decl));
1574 /* Virtual tables have DECL_CONTEXT set to their associated class,
1575 so they are automatically handled above. */
1576 gcc_assert (TREE_CODE (decl) != VAR_DECL
1577 || !DECL_VTABLE_OR_VTT_P (decl));
1579 if (DECL_FUNCTION_SCOPE_P (decl))
1581 tree fn = DECL_CONTEXT (decl);
1582 DECL_VISIBILITY (decl) = DECL_VISIBILITY (fn);
1583 DECL_VISIBILITY_SPECIFIED (decl) = DECL_VISIBILITY_SPECIFIED (fn);
1586 /* Entities not associated with any class just get the
1587 visibility specified by their attributes. */
1591 /* By default, static data members and function members receive
1592 the visibility of their containing class. */
1595 determine_visibility_from_class (decl, class_type);
1597 /* Give the target a chance to override the visibility associated
1599 if (TREE_CODE (decl) == VAR_DECL
1600 && (DECL_TINFO_P (decl)
1601 || (DECL_VTABLE_OR_VTT_P (decl)
1602 /* Construction virtual tables are not exported because
1603 they cannot be referred to from other object files;
1604 their name is not standardized by the ABI. */
1605 && !DECL_CONSTRUCTION_VTABLE_P (decl)))
1606 && TREE_PUBLIC (decl)
1607 && !DECL_REALLY_EXTERN (decl)
1608 && DECL_VISIBILITY_SPECIFIED (decl)
1609 && (!class_type || !CLASSTYPE_VISIBILITY_SPECIFIED (class_type)))
1610 targetm.cxx.determine_class_data_visibility (decl);
1615 determine_visibility_from_class (tree decl, tree class_type)
1617 if (TARGET_DLLIMPORT_DECL_ATTRIBUTES
1618 && lookup_attribute ("dllexport", TYPE_ATTRIBUTES (class_type)))
1620 DECL_VISIBILITY (decl) = VISIBILITY_DEFAULT;
1621 DECL_VISIBILITY_SPECIFIED (decl) = 1;
1623 else if (TREE_CODE (decl) == FUNCTION_DECL
1624 && DECL_DECLARED_INLINE_P (decl)
1625 && visibility_options.inlines_hidden)
1627 /* Don't change it if it has been set explicitly by user. */
1628 if (!DECL_VISIBILITY_SPECIFIED (decl))
1630 DECL_VISIBILITY (decl) = VISIBILITY_HIDDEN;
1631 DECL_VISIBILITY_SPECIFIED (decl) = 1;
1634 else if (CLASSTYPE_VISIBILITY_SPECIFIED (class_type))
1636 DECL_VISIBILITY (decl) = CLASSTYPE_VISIBILITY (class_type);
1637 DECL_VISIBILITY_SPECIFIED (decl) = 1;
1639 else if (TYPE_CLASS_SCOPE_P (class_type))
1640 determine_visibility_from_class (decl, TYPE_CONTEXT (class_type));
1641 else if (TYPE_FUNCTION_SCOPE_P (class_type))
1643 tree fn = TYPE_CONTEXT (class_type);
1644 DECL_VISIBILITY (decl) = DECL_VISIBILITY (fn);
1645 DECL_VISIBILITY_SPECIFIED (decl) = DECL_VISIBILITY_SPECIFIED (fn);
1647 else if (!DECL_VISIBILITY_SPECIFIED (decl))
1649 DECL_VISIBILITY (decl) = CLASSTYPE_VISIBILITY (class_type);
1650 DECL_VISIBILITY_SPECIFIED (decl) = 0;
1654 /* DECL is a FUNCTION_DECL or VAR_DECL. If the object file linkage
1655 for DECL has not already been determined, do so now by setting
1656 DECL_EXTERNAL, DECL_COMDAT and other related flags. Until this
1657 function is called entities with vague linkage whose definitions
1658 are available must have TREE_PUBLIC set.
1660 If this function decides to place DECL in COMDAT, it will set
1661 appropriate flags -- but will not clear DECL_EXTERNAL. It is up to
1662 the caller to decide whether or not to clear DECL_EXTERNAL. Some
1663 callers defer that decision until it is clear that DECL is actually
1667 import_export_decl (tree decl)
1672 tree class_type = NULL_TREE;
1674 if (DECL_INTERFACE_KNOWN (decl))
1677 /* We cannot determine what linkage to give to an entity with vague
1678 linkage until the end of the file. For example, a virtual table
1679 for a class will be defined if and only if the key method is
1680 defined in this translation unit. As a further example, consider
1681 that when compiling a translation unit that uses PCH file with
1682 "-frepo" it would be incorrect to make decisions about what
1683 entities to emit when building the PCH; those decisions must be
1684 delayed until the repository information has been processed. */
1685 gcc_assert (at_eof);
1686 /* Object file linkage for explicit instantiations is handled in
1687 mark_decl_instantiated. For static variables in functions with
1688 vague linkage, maybe_commonize_var is used.
1690 Therefore, the only declarations that should be provided to this
1691 function are those with external linkage that are:
1693 * implicit instantiations of function templates
1697 * implicit instantiations of static data members of class
1704 Furthermore, all entities that reach this point must have a
1705 definition available in this translation unit.
1707 The following assertions check these conditions. */
1708 gcc_assert (TREE_CODE (decl) == FUNCTION_DECL
1709 || TREE_CODE (decl) == VAR_DECL);
1710 /* Any code that creates entities with TREE_PUBLIC cleared should
1711 also set DECL_INTERFACE_KNOWN. */
1712 gcc_assert (TREE_PUBLIC (decl));
1713 if (TREE_CODE (decl) == FUNCTION_DECL)
1714 gcc_assert (DECL_IMPLICIT_INSTANTIATION (decl)
1715 || DECL_FRIEND_PSEUDO_TEMPLATE_INSTANTIATION (decl)
1716 || DECL_DECLARED_INLINE_P (decl));
1718 gcc_assert (DECL_IMPLICIT_INSTANTIATION (decl)
1719 || DECL_VTABLE_OR_VTT_P (decl)
1720 || DECL_TINFO_P (decl));
1721 /* Check that a definition of DECL is available in this translation
1723 gcc_assert (!DECL_REALLY_EXTERN (decl));
1725 /* Assume that DECL will not have COMDAT linkage. */
1727 /* Assume that DECL will not be imported into this translation
1731 /* See if the repository tells us whether or not to emit DECL in
1732 this translation unit. */
1733 emit_p = repo_emit_p (decl);
1736 else if (emit_p == 1)
1738 /* The repository indicates that this entity should be defined
1739 here. Make sure the back end honors that request. */
1740 if (TREE_CODE (decl) == VAR_DECL)
1742 else if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl)
1743 || DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P (decl))
1746 FOR_EACH_CLONE (clone, decl)
1747 mark_needed (clone);
1751 /* Output the definition as an ordinary strong definition. */
1752 DECL_EXTERNAL (decl) = 0;
1753 DECL_INTERFACE_KNOWN (decl) = 1;
1758 /* We have already decided what to do with this DECL; there is no
1759 need to check anything further. */
1761 else if (TREE_CODE (decl) == VAR_DECL && DECL_VTABLE_OR_VTT_P (decl))
1763 class_type = DECL_CONTEXT (decl);
1764 import_export_class (class_type);
1765 if (TYPE_FOR_JAVA (class_type))
1767 else if (CLASSTYPE_INTERFACE_KNOWN (class_type)
1768 && CLASSTYPE_INTERFACE_ONLY (class_type))
1770 else if ((!flag_weak || TARGET_WEAK_NOT_IN_ARCHIVE_TOC)
1771 && !CLASSTYPE_USE_TEMPLATE (class_type)
1772 && CLASSTYPE_KEY_METHOD (class_type)
1773 && !DECL_DECLARED_INLINE_P (CLASSTYPE_KEY_METHOD (class_type)))
1774 /* The ABI requires that all virtual tables be emitted with
1775 COMDAT linkage. However, on systems where COMDAT symbols
1776 don't show up in the table of contents for a static
1777 archive, or on systems without weak symbols (where we
1778 approximate COMDAT linkage by using internal linkage), the
1779 linker will report errors about undefined symbols because
1780 it will not see the virtual table definition. Therefore,
1781 in the case that we know that the virtual table will be
1782 emitted in only one translation unit, we make the virtual
1783 table an ordinary definition with external linkage. */
1784 DECL_EXTERNAL (decl) = 0;
1785 else if (CLASSTYPE_INTERFACE_KNOWN (class_type))
1787 /* CLASS_TYPE is being exported from this translation unit,
1788 so DECL should be defined here. */
1789 if (!flag_weak && CLASSTYPE_EXPLICIT_INSTANTIATION (class_type))
1790 /* If a class is declared in a header with the "extern
1791 template" extension, then it will not be instantiated,
1792 even in translation units that would normally require
1793 it. Often such classes are explicitly instantiated in
1794 one translation unit. Therefore, the explicit
1795 instantiation must be made visible to other translation
1797 DECL_EXTERNAL (decl) = 0;
1800 /* The generic C++ ABI says that class data is always
1801 COMDAT, even if there is a key function. Some
1802 variants (e.g., the ARM EABI) says that class data
1803 only has COMDAT linkage if the class data might be
1804 emitted in more than one translation unit. When the
1805 key method can be inline and is inline, we still have
1806 to arrange for comdat even though
1807 class_data_always_comdat is false. */
1808 if (!CLASSTYPE_KEY_METHOD (class_type)
1809 || DECL_DECLARED_INLINE_P (CLASSTYPE_KEY_METHOD (class_type))
1810 || targetm.cxx.class_data_always_comdat ())
1812 /* The ABI requires COMDAT linkage. Normally, we
1813 only emit COMDAT things when they are needed;
1814 make sure that we realize that this entity is
1821 else if (!flag_implicit_templates
1822 && CLASSTYPE_IMPLICIT_INSTANTIATION (class_type))
1827 else if (TREE_CODE (decl) == VAR_DECL && DECL_TINFO_P (decl))
1829 tree type = TREE_TYPE (DECL_NAME (decl));
1830 if (CLASS_TYPE_P (type))
1833 import_export_class (type);
1834 if (CLASSTYPE_INTERFACE_KNOWN (type)
1835 && TYPE_POLYMORPHIC_P (type)
1836 && CLASSTYPE_INTERFACE_ONLY (type)
1837 /* If -fno-rtti was specified, then we cannot be sure
1838 that RTTI information will be emitted with the
1839 virtual table of the class, so we must emit it
1840 wherever it is used. */
1845 if (CLASSTYPE_INTERFACE_KNOWN (type)
1846 && !CLASSTYPE_INTERFACE_ONLY (type))
1848 comdat_p = (targetm.cxx.class_data_always_comdat ()
1849 || (CLASSTYPE_KEY_METHOD (type)
1850 && DECL_DECLARED_INLINE_P (CLASSTYPE_KEY_METHOD (type))));
1855 DECL_EXTERNAL (decl) = 0;
1865 else if (DECL_TEMPLATE_INSTANTIATION (decl)
1866 || DECL_FRIEND_PSEUDO_TEMPLATE_INSTANTIATION (decl))
1868 /* DECL is an implicit instantiation of a function or static
1870 if (flag_implicit_templates
1871 || (flag_implicit_inline_templates
1872 && TREE_CODE (decl) == FUNCTION_DECL
1873 && DECL_DECLARED_INLINE_P (decl)))
1876 /* If we are not implicitly generating templates, then mark
1877 this entity as undefined in this translation unit. */
1880 else if (DECL_FUNCTION_MEMBER_P (decl))
1882 if (!DECL_DECLARED_INLINE_P (decl))
1884 tree ctype = DECL_CONTEXT (decl);
1885 import_export_class (ctype);
1886 if (CLASSTYPE_INTERFACE_KNOWN (ctype))
1888 DECL_NOT_REALLY_EXTERN (decl)
1889 = ! (CLASSTYPE_INTERFACE_ONLY (ctype)
1890 || (DECL_DECLARED_INLINE_P (decl)
1891 && ! flag_implement_inlines
1892 && !DECL_VINDEX (decl)));
1894 if (!DECL_NOT_REALLY_EXTERN (decl))
1895 DECL_EXTERNAL (decl) = 1;
1897 /* Always make artificials weak. */
1898 if (DECL_ARTIFICIAL (decl) && flag_weak)
1901 maybe_make_one_only (decl);
1912 /* If we are importing DECL into this translation unit, mark is
1913 an undefined here. */
1914 DECL_EXTERNAL (decl) = 1;
1915 DECL_NOT_REALLY_EXTERN (decl) = 0;
1919 /* If we decided to put DECL in COMDAT, mark it accordingly at
1921 comdat_linkage (decl);
1924 DECL_INTERFACE_KNOWN (decl) = 1;
1927 /* Return an expression that performs the destruction of DECL, which
1928 must be a VAR_DECL whose type has a non-trivial destructor, or is
1929 an array whose (innermost) elements have a non-trivial destructor. */
1932 build_cleanup (tree decl)
1935 tree type = TREE_TYPE (decl);
1937 /* This function should only be called for declarations that really
1938 require cleanups. */
1939 gcc_assert (!TYPE_HAS_TRIVIAL_DESTRUCTOR (type));
1941 /* Treat all objects with destructors as used; the destructor may do
1942 something substantive. */
1945 if (TREE_CODE (type) == ARRAY_TYPE)
1949 cxx_mark_addressable (decl);
1950 temp = build1 (ADDR_EXPR, build_pointer_type (type), decl);
1952 temp = build_delete (TREE_TYPE (temp), temp,
1953 sfk_complete_destructor,
1954 LOOKUP_NORMAL|LOOKUP_NONVIRTUAL|LOOKUP_DESTRUCTOR, 0);
1958 /* Returns the initialization guard variable for the variable DECL,
1959 which has static storage duration. */
1962 get_guard (tree decl)
1967 sname = mangle_guard_variable (decl);
1968 guard = IDENTIFIER_GLOBAL_VALUE (sname);
1973 /* We use a type that is big enough to contain a mutex as well
1974 as an integer counter. */
1975 guard_type = targetm.cxx.guard_type ();
1976 guard = build_decl (VAR_DECL, sname, guard_type);
1978 /* The guard should have the same linkage as what it guards. */
1979 TREE_PUBLIC (guard) = TREE_PUBLIC (decl);
1980 TREE_STATIC (guard) = TREE_STATIC (decl);
1981 DECL_COMMON (guard) = DECL_COMMON (decl);
1982 DECL_ONE_ONLY (guard) = DECL_ONE_ONLY (decl);
1983 if (TREE_PUBLIC (decl))
1984 DECL_WEAK (guard) = DECL_WEAK (decl);
1986 DECL_ARTIFICIAL (guard) = 1;
1987 DECL_IGNORED_P (guard) = 1;
1988 TREE_USED (guard) = 1;
1989 pushdecl_top_level_and_finish (guard, NULL_TREE);
1994 /* Return those bits of the GUARD variable that should be set when the
1995 guarded entity is actually initialized. */
1998 get_guard_bits (tree guard)
2000 if (!targetm.cxx.guard_mask_bit ())
2002 /* We only set the first byte of the guard, in order to leave room
2003 for a mutex in the high-order bits. */
2004 guard = build1 (ADDR_EXPR,
2005 build_pointer_type (TREE_TYPE (guard)),
2007 guard = build1 (NOP_EXPR,
2008 build_pointer_type (char_type_node),
2010 guard = build1 (INDIRECT_REF, char_type_node, guard);
2016 /* Return an expression which determines whether or not the GUARD
2017 variable has already been initialized. */
2020 get_guard_cond (tree guard)
2024 /* Check to see if the GUARD is zero. */
2025 guard = get_guard_bits (guard);
2027 /* Mask off all but the low bit. */
2028 if (targetm.cxx.guard_mask_bit ())
2030 guard_value = integer_one_node;
2031 if (!same_type_p (TREE_TYPE (guard_value), TREE_TYPE (guard)))
2032 guard_value = convert (TREE_TYPE (guard), guard_value);
2033 guard = cp_build_binary_op (BIT_AND_EXPR, guard, guard_value);
2036 guard_value = integer_zero_node;
2037 if (!same_type_p (TREE_TYPE (guard_value), TREE_TYPE (guard)))
2038 guard_value = convert (TREE_TYPE (guard), guard_value);
2039 return cp_build_binary_op (EQ_EXPR, guard, guard_value);
2042 /* Return an expression which sets the GUARD variable, indicating that
2043 the variable being guarded has been initialized. */
2046 set_guard (tree guard)
2050 /* Set the GUARD to one. */
2051 guard = get_guard_bits (guard);
2052 guard_init = integer_one_node;
2053 if (!same_type_p (TREE_TYPE (guard_init), TREE_TYPE (guard)))
2054 guard_init = convert (TREE_TYPE (guard), guard_init);
2055 return build_modify_expr (guard, NOP_EXPR, guard_init);
2058 /* Start the process of running a particular set of global constructors
2059 or destructors. Subroutine of do_[cd]tors. */
2062 start_objects (int method_type, int initp)
2068 /* Make ctor or dtor function. METHOD_TYPE may be 'I' or 'D'. */
2070 if (initp != DEFAULT_INIT_PRIORITY)
2080 sprintf (type, "%c%c%.5u", method_type, joiner, initp);
2083 sprintf (type, "%c", method_type);
2085 fndecl = build_lang_decl (FUNCTION_DECL,
2086 get_file_function_name_long (type),
2087 build_function_type (void_type_node,
2089 start_preparsed_function (fndecl, /*attrs=*/NULL_TREE, SF_PRE_PARSED);
2091 /* It can be a static function as long as collect2 does not have
2092 to scan the object file to find its ctor/dtor routine. */
2093 TREE_PUBLIC (current_function_decl) = ! targetm.have_ctors_dtors;
2095 /* Mark this declaration as used to avoid spurious warnings. */
2096 TREE_USED (current_function_decl) = 1;
2098 /* Mark this function as a global constructor or destructor. */
2099 if (method_type == 'I')
2100 DECL_GLOBAL_CTOR_P (current_function_decl) = 1;
2102 DECL_GLOBAL_DTOR_P (current_function_decl) = 1;
2103 DECL_LANG_SPECIFIC (current_function_decl)->decl_flags.u2sel = 1;
2105 body = begin_compound_stmt (BCS_FN_BODY);
2107 /* We cannot allow these functions to be elided, even if they do not
2108 have external linkage. And, there's no point in deferring
2109 compilation of these functions; they're all going to have to be
2111 DECL_INLINE (current_function_decl) = 0;
2112 DECL_UNINLINABLE (current_function_decl) = 1;
2117 /* Finish the process of running a particular set of global constructors
2118 or destructors. Subroutine of do_[cd]tors. */
2121 finish_objects (int method_type, int initp, tree body)
2126 finish_compound_stmt (body);
2127 fn = finish_function (0);
2128 expand_or_defer_fn (fn);
2130 /* When only doing semantic analysis, and no RTL generation, we
2131 can't call functions that directly emit assembly code; there is
2132 no assembly file in which to put the code. */
2133 if (flag_syntax_only)
2136 if (targetm.have_ctors_dtors)
2138 rtx fnsym = XEXP (DECL_RTL (fn), 0);
2139 cgraph_mark_needed_node (cgraph_node (fn));
2140 if (method_type == 'I')
2141 (* targetm.asm_out.constructor) (fnsym, initp);
2143 (* targetm.asm_out.destructor) (fnsym, initp);
2147 /* The names of the parameters to the function created to handle
2148 initializations and destructions for objects with static storage
2150 #define INITIALIZE_P_IDENTIFIER "__initialize_p"
2151 #define PRIORITY_IDENTIFIER "__priority"
2153 /* The name of the function we create to handle initializations and
2154 destructions for objects with static storage duration. */
2155 #define SSDF_IDENTIFIER "__static_initialization_and_destruction"
2157 /* The declaration for the __INITIALIZE_P argument. */
2158 static GTY(()) tree initialize_p_decl;
2160 /* The declaration for the __PRIORITY argument. */
2161 static GTY(()) tree priority_decl;
2163 /* The declaration for the static storage duration function. */
2164 static GTY(()) tree ssdf_decl;
2166 /* All the static storage duration functions created in this
2167 translation unit. */
2168 static GTY(()) VEC(tree,gc) *ssdf_decls;
2170 /* A map from priority levels to information about that priority
2171 level. There may be many such levels, so efficient lookup is
2173 static splay_tree priority_info_map;
2175 /* Begins the generation of the function that will handle all
2176 initialization and destruction of objects with static storage
2177 duration. The function generated takes two parameters of type
2178 `int': __INITIALIZE_P and __PRIORITY. If __INITIALIZE_P is
2179 nonzero, it performs initializations. Otherwise, it performs
2180 destructions. It only performs those initializations or
2181 destructions with the indicated __PRIORITY. The generated function
2184 It is assumed that this function will only be called once per
2185 translation unit. */
2188 start_static_storage_duration_function (unsigned count)
2193 char id[sizeof (SSDF_IDENTIFIER) + 1 /* '\0' */ + 32];
2195 /* Create the identifier for this function. It will be of the form
2196 SSDF_IDENTIFIER_<number>. */
2197 sprintf (id, "%s_%u", SSDF_IDENTIFIER, count);
2199 /* Create the parameters. */
2200 parm_types = void_list_node;
2201 parm_types = tree_cons (NULL_TREE, integer_type_node, parm_types);
2202 parm_types = tree_cons (NULL_TREE, integer_type_node, parm_types);
2203 type = build_function_type (void_type_node, parm_types);
2205 /* Create the FUNCTION_DECL itself. */
2206 ssdf_decl = build_lang_decl (FUNCTION_DECL,
2207 get_identifier (id),
2209 TREE_PUBLIC (ssdf_decl) = 0;
2210 DECL_ARTIFICIAL (ssdf_decl) = 1;
2212 /* Put this function in the list of functions to be called from the
2213 static constructors and destructors. */
2216 ssdf_decls = VEC_alloc (tree, gc, 32);
2218 /* Take this opportunity to initialize the map from priority
2219 numbers to information about that priority level. */
2220 priority_info_map = splay_tree_new (splay_tree_compare_ints,
2221 /*delete_key_fn=*/0,
2222 /*delete_value_fn=*/
2223 (splay_tree_delete_value_fn) &free);
2225 /* We always need to generate functions for the
2226 DEFAULT_INIT_PRIORITY so enter it now. That way when we walk
2227 priorities later, we'll be sure to find the
2228 DEFAULT_INIT_PRIORITY. */
2229 get_priority_info (DEFAULT_INIT_PRIORITY);
2232 VEC_safe_push (tree, gc, ssdf_decls, ssdf_decl);
2234 /* Create the argument list. */
2235 initialize_p_decl = cp_build_parm_decl
2236 (get_identifier (INITIALIZE_P_IDENTIFIER), integer_type_node);
2237 DECL_CONTEXT (initialize_p_decl) = ssdf_decl;
2238 TREE_USED (initialize_p_decl) = 1;
2239 priority_decl = cp_build_parm_decl
2240 (get_identifier (PRIORITY_IDENTIFIER), integer_type_node);
2241 DECL_CONTEXT (priority_decl) = ssdf_decl;
2242 TREE_USED (priority_decl) = 1;
2244 TREE_CHAIN (initialize_p_decl) = priority_decl;
2245 DECL_ARGUMENTS (ssdf_decl) = initialize_p_decl;
2247 /* Put the function in the global scope. */
2248 pushdecl (ssdf_decl);
2250 /* Start the function itself. This is equivalent to declaring the
2253 static void __ssdf (int __initialize_p, init __priority_p);
2255 It is static because we only need to call this function from the
2256 various constructor and destructor functions for this module. */
2257 start_preparsed_function (ssdf_decl,
2258 /*attrs=*/NULL_TREE,
2261 /* Set up the scope of the outermost block in the function. */
2262 body = begin_compound_stmt (BCS_FN_BODY);
2264 /* This function must not be deferred because we are depending on
2265 its compilation to tell us what is TREE_SYMBOL_REFERENCED. */
2266 DECL_INLINE (ssdf_decl) = 0;
2267 DECL_UNINLINABLE (ssdf_decl) = 1;
2272 /* Finish the generation of the function which performs initialization
2273 and destruction of objects with static storage duration. After
2274 this point, no more such objects can be created. */
2277 finish_static_storage_duration_function (tree body)
2279 /* Close out the function. */
2280 finish_compound_stmt (body);
2281 expand_or_defer_fn (finish_function (0));
2284 /* Return the information about the indicated PRIORITY level. If no
2285 code to handle this level has yet been generated, generate the
2286 appropriate prologue. */
2288 static priority_info
2289 get_priority_info (int priority)
2294 n = splay_tree_lookup (priority_info_map,
2295 (splay_tree_key) priority);
2298 /* Create a new priority information structure, and insert it
2300 pi = XNEW (struct priority_info_s);
2301 pi->initializations_p = 0;
2302 pi->destructions_p = 0;
2303 splay_tree_insert (priority_info_map,
2304 (splay_tree_key) priority,
2305 (splay_tree_value) pi);
2308 pi = (priority_info) n->value;
2313 /* The effective initialization priority of a DECL. */
2315 #define DECL_EFFECTIVE_INIT_PRIORITY(decl) \
2316 ((!DECL_HAS_INIT_PRIORITY_P (decl) || DECL_INIT_PRIORITY (decl) == 0) \
2317 ? DEFAULT_INIT_PRIORITY : DECL_INIT_PRIORITY (decl))
2319 /* Whether a DECL needs a guard to protect it against multiple
2322 #define NEEDS_GUARD_P(decl) (TREE_PUBLIC (decl) && (DECL_COMMON (decl) \
2323 || DECL_ONE_ONLY (decl) \
2324 || DECL_WEAK (decl)))
2326 /* Set up to handle the initialization or destruction of DECL. If
2327 INITP is nonzero, we are initializing the variable. Otherwise, we
2328 are destroying it. */
2331 one_static_initialization_or_destruction (tree decl, tree init, bool initp)
2333 tree guard_if_stmt = NULL_TREE;
2336 /* If we are supposed to destruct and there's a trivial destructor,
2337 nothing has to be done. */
2339 && TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
2342 /* Trick the compiler into thinking we are at the file and line
2343 where DECL was declared so that error-messages make sense, and so
2344 that the debugger will show somewhat sensible file and line
2346 input_location = DECL_SOURCE_LOCATION (decl);
2352 Access control for implicit calls to the constructors,
2353 the conversion functions, or the destructor called to
2354 create and destroy a static data member is performed as
2355 if these calls appeared in the scope of the member's
2358 we pretend we are in a static member function of the class of
2359 which the DECL is a member. */
2360 if (member_p (decl))
2362 DECL_CONTEXT (current_function_decl) = DECL_CONTEXT (decl);
2363 DECL_STATIC_FUNCTION_P (current_function_decl) = 1;
2366 /* Assume we don't need a guard. */
2368 /* We need a guard if this is an object with external linkage that
2369 might be initialized in more than one place. (For example, a
2370 static data member of a template, when the data member requires
2372 if (NEEDS_GUARD_P (decl))
2376 guard = get_guard (decl);
2378 /* When using __cxa_atexit, we just check the GUARD as we would
2379 for a local static. */
2380 if (flag_use_cxa_atexit)
2382 /* When using __cxa_atexit, we never try to destroy
2383 anything from a static destructor. */
2385 guard_cond = get_guard_cond (guard);
2387 /* If we don't have __cxa_atexit, then we will be running
2388 destructors from .fini sections, or their equivalents. So,
2389 we need to know how many times we've tried to initialize this
2390 object. We do initializations only if the GUARD is zero,
2391 i.e., if we are the first to initialize the variable. We do
2392 destructions only if the GUARD is one, i.e., if we are the
2393 last to destroy the variable. */
2396 = cp_build_binary_op (EQ_EXPR,
2397 build_unary_op (PREINCREMENT_EXPR,
2403 = cp_build_binary_op (EQ_EXPR,
2404 build_unary_op (PREDECREMENT_EXPR,
2409 guard_if_stmt = begin_if_stmt ();
2410 finish_if_stmt_cond (guard_cond, guard_if_stmt);
2414 /* If we're using __cxa_atexit, we have not already set the GUARD,
2415 so we must do so now. */
2416 if (guard && initp && flag_use_cxa_atexit)
2417 finish_expr_stmt (set_guard (guard));
2419 /* Perform the initialization or destruction. */
2423 finish_expr_stmt (init);
2425 /* If we're using __cxa_atexit, register a function that calls the
2426 destructor for the object. */
2427 if (flag_use_cxa_atexit)
2428 finish_expr_stmt (register_dtor_fn (decl));
2431 finish_expr_stmt (build_cleanup (decl));
2433 /* Finish the guard if-stmt, if necessary. */
2436 finish_then_clause (guard_if_stmt);
2437 finish_if_stmt (guard_if_stmt);
2440 /* Now that we're done with DECL we don't need to pretend to be a
2441 member of its class any longer. */
2442 DECL_CONTEXT (current_function_decl) = NULL_TREE;
2443 DECL_STATIC_FUNCTION_P (current_function_decl) = 0;
2446 /* Generate code to do the initialization or destruction of the decls in VARS,
2447 a TREE_LIST of VAR_DECL with static storage duration.
2448 Whether initialization or destruction is performed is specified by INITP. */
2451 do_static_initialization_or_destruction (tree vars, bool initp)
2453 tree node, init_if_stmt, cond;
2455 /* Build the outer if-stmt to check for initialization or destruction. */
2456 init_if_stmt = begin_if_stmt ();
2457 cond = initp ? integer_one_node : integer_zero_node;
2458 cond = cp_build_binary_op (EQ_EXPR,
2461 finish_if_stmt_cond (cond, init_if_stmt);
2465 tree decl = TREE_VALUE (node);
2466 tree priority_if_stmt;
2470 /* If we don't need a destructor, there's nothing to do. Avoid
2471 creating a possibly empty if-stmt. */
2472 if (!initp && TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
2474 node = TREE_CHAIN (node);
2478 /* Remember that we had an initialization or finalization at this
2480 priority = DECL_EFFECTIVE_INIT_PRIORITY (decl);
2481 pi = get_priority_info (priority);
2483 pi->initializations_p = 1;
2485 pi->destructions_p = 1;
2487 /* Conditionalize this initialization on being in the right priority
2488 and being initializing/finalizing appropriately. */
2489 priority_if_stmt = begin_if_stmt ();
2490 cond = cp_build_binary_op (EQ_EXPR,
2492 build_int_cst (NULL_TREE, priority));
2493 finish_if_stmt_cond (cond, priority_if_stmt);
2495 /* Process initializers with same priority. */
2497 && DECL_EFFECTIVE_INIT_PRIORITY (TREE_VALUE (node)) == priority;
2498 node = TREE_CHAIN (node))
2499 /* Do one initialization or destruction. */
2500 one_static_initialization_or_destruction (TREE_VALUE (node),
2501 TREE_PURPOSE (node), initp);
2503 /* Finish up the priority if-stmt body. */
2504 finish_then_clause (priority_if_stmt);
2505 finish_if_stmt (priority_if_stmt);
2509 /* Finish up the init/destruct if-stmt body. */
2510 finish_then_clause (init_if_stmt);
2511 finish_if_stmt (init_if_stmt);
2514 /* VARS is a list of variables with static storage duration which may
2515 need initialization and/or finalization. Remove those variables
2516 that don't really need to be initialized or finalized, and return
2517 the resulting list. The order in which the variables appear in
2518 VARS is in reverse order of the order in which they should actually
2519 be initialized. The list we return is in the unreversed order;
2520 i.e., the first variable should be initialized first. */
2523 prune_vars_needing_no_initialization (tree *vars)
2526 tree result = NULL_TREE;
2531 tree decl = TREE_VALUE (t);
2532 tree init = TREE_PURPOSE (t);
2534 /* Deal gracefully with error. */
2535 if (decl == error_mark_node)
2537 var = &TREE_CHAIN (t);
2541 /* The only things that can be initialized are variables. */
2542 gcc_assert (TREE_CODE (decl) == VAR_DECL);
2544 /* If this object is not defined, we don't need to do anything
2546 if (DECL_EXTERNAL (decl))
2548 var = &TREE_CHAIN (t);
2552 /* Also, if the initializer already contains errors, we can bail
2554 if (init && TREE_CODE (init) == TREE_LIST
2555 && value_member (error_mark_node, init))
2557 var = &TREE_CHAIN (t);
2561 /* This variable is going to need initialization and/or
2562 finalization, so we add it to the list. */
2563 *var = TREE_CHAIN (t);
2564 TREE_CHAIN (t) = result;
2571 /* Make sure we have told the back end about all the variables in
2575 write_out_vars (tree vars)
2579 for (v = vars; v; v = TREE_CHAIN (v))
2581 tree var = TREE_VALUE (v);
2582 if (!var_finalized_p (var))
2584 import_export_decl (var);
2585 rest_of_decl_compilation (var, 1, 1);
2590 /* Generate a static constructor (if CONSTRUCTOR_P) or destructor
2591 (otherwise) that will initialize all gobal objects with static
2592 storage duration having the indicated PRIORITY. */
2595 generate_ctor_or_dtor_function (bool constructor_p, int priority,
2604 input_location = *locus;
2605 #ifdef USE_MAPPED_LOCATION
2611 /* We use `I' to indicate initialization and `D' to indicate
2613 function_key = constructor_p ? 'I' : 'D';
2615 /* We emit the function lazily, to avoid generating empty
2616 global constructors and destructors. */
2619 /* For Objective-C++, we may need to initialize metadata found in this module.
2620 This must be done _before_ any other static initializations. */
2621 if (c_dialect_objc () && (priority == DEFAULT_INIT_PRIORITY)
2622 && constructor_p && objc_static_init_needed_p ())
2624 body = start_objects (function_key, priority);
2625 static_ctors = objc_generate_static_init_call (static_ctors);
2628 /* Call the static storage duration function with appropriate
2630 for (i = 0; VEC_iterate (tree, ssdf_decls, i, fndecl); ++i)
2632 /* Calls to pure or const functions will expand to nothing. */
2633 if (! (flags_from_decl_or_type (fndecl) & (ECF_CONST | ECF_PURE)))
2636 body = start_objects (function_key, priority);
2638 arguments = tree_cons (NULL_TREE,
2639 build_int_cst (NULL_TREE, priority),
2641 arguments = tree_cons (NULL_TREE,
2642 build_int_cst (NULL_TREE, constructor_p),
2644 finish_expr_stmt (build_function_call (fndecl, arguments));
2648 /* If we're generating code for the DEFAULT_INIT_PRIORITY, throw in
2649 calls to any functions marked with attributes indicating that
2650 they should be called at initialization- or destruction-time. */
2651 if (priority == DEFAULT_INIT_PRIORITY)
2655 for (fns = constructor_p ? static_ctors : static_dtors;
2657 fns = TREE_CHAIN (fns))
2659 fndecl = TREE_VALUE (fns);
2661 /* Calls to pure/const functions will expand to nothing. */
2662 if (! (flags_from_decl_or_type (fndecl) & (ECF_CONST | ECF_PURE)))
2665 body = start_objects (function_key, priority);
2666 finish_expr_stmt (build_function_call (fndecl, NULL_TREE));
2671 /* Close out the function. */
2673 finish_objects (function_key, priority, body);
2676 /* Generate constructor and destructor functions for the priority
2680 generate_ctor_and_dtor_functions_for_priority (splay_tree_node n, void * data)
2682 location_t *locus = (location_t *) data;
2683 int priority = (int) n->key;
2684 priority_info pi = (priority_info) n->value;
2686 /* Generate the functions themselves, but only if they are really
2688 if (pi->initializations_p
2689 || (priority == DEFAULT_INIT_PRIORITY && static_ctors))
2690 generate_ctor_or_dtor_function (/*constructor_p=*/true, priority, locus);
2691 if (pi->destructions_p
2692 || (priority == DEFAULT_INIT_PRIORITY && static_dtors))
2693 generate_ctor_or_dtor_function (/*constructor_p=*/false, priority, locus);
2695 /* Keep iterating. */
2699 /* Called via LANGHOOK_CALLGRAPH_ANALYZE_EXPR. It is supposed to mark
2700 decls referenced from frontend specific constructs; it will be called
2701 only for language-specific tree nodes.
2703 Here we must deal with member pointers. */
2706 cxx_callgraph_analyze_expr (tree *tp, int *walk_subtrees ATTRIBUTE_UNUSED,
2707 tree from ATTRIBUTE_UNUSED)
2711 switch (TREE_CODE (t))
2714 if (TYPE_PTRMEMFUNC_P (TREE_TYPE (t)))
2715 cgraph_mark_needed_node (cgraph_node (PTRMEM_CST_MEMBER (t)));
2718 if (TREE_CODE (BASELINK_FUNCTIONS (t)) == FUNCTION_DECL)
2719 cgraph_mark_needed_node (cgraph_node (BASELINK_FUNCTIONS (t)));
2722 if (DECL_VTABLE_OR_VTT_P (t))
2724 /* The ABI requires that all virtual tables be emitted
2725 whenever one of them is. */
2727 for (vtbl = CLASSTYPE_VTABLES (DECL_CONTEXT (t));
2729 vtbl = TREE_CHAIN (vtbl))
2730 mark_decl_referenced (vtbl);
2732 else if (DECL_CONTEXT (t)
2733 && TREE_CODE (DECL_CONTEXT (t)) == FUNCTION_DECL)
2734 /* If we need a static variable in a function, then we
2735 need the containing function. */
2736 mark_decl_referenced (DECL_CONTEXT (t));
2745 /* Java requires that we be able to reference a local address for a
2746 method, and not be confused by PLT entries. If hidden aliases are
2747 supported, emit one for each java function that we've emitted. */
2750 build_java_method_aliases (void)
2752 struct cgraph_node *node;
2754 #ifndef HAVE_GAS_HIDDEN
2758 for (node = cgraph_nodes; node ; node = node->next)
2760 tree fndecl = node->decl;
2762 if (TREE_ASM_WRITTEN (fndecl)
2763 && DECL_CONTEXT (fndecl)
2764 && TYPE_P (DECL_CONTEXT (fndecl))
2765 && TYPE_FOR_JAVA (DECL_CONTEXT (fndecl))
2766 && TARGET_USE_LOCAL_THUNK_ALIAS_P (fndecl))
2768 /* Mangle the name in a predictable way; we need to reference
2769 this from a java compiled object file. */
2770 tree oid, nid, alias;
2774 oid = DECL_ASSEMBLER_NAME (fndecl);
2775 oname = IDENTIFIER_POINTER (oid);
2776 gcc_assert (oname[0] == '_' && oname[1] == 'Z');
2777 nname = ACONCAT (("_ZGA", oname+2, NULL));
2778 nid = get_identifier (nname);
2780 alias = make_alias_for (fndecl, nid);
2781 TREE_PUBLIC (alias) = 1;
2782 DECL_VISIBILITY (alias) = VISIBILITY_HIDDEN;
2784 assemble_alias (alias, oid);
2789 /* This routine is called from the last rule in yyparse ().
2790 Its job is to create all the code needed to initialize and
2791 destroy the global aggregates. We do the destruction
2792 first, since that way we only need to reverse the decls once. */
2795 cp_finish_file (void)
2801 unsigned ssdf_count = 0;
2805 locus = input_location;
2808 /* Bad parse errors. Just forget about it. */
2809 if (! global_bindings_p () || current_class_type || decl_namespace_list)
2813 c_common_write_pch ();
2815 #ifdef USE_MAPPED_LOCATION
2818 /* Otherwise, GDB can get confused, because in only knows
2819 about source for LINENO-1 lines. */
2823 /* We now have to write out all the stuff we put off writing out.
2826 o Template specializations that we have not yet instantiated,
2827 but which are needed.
2828 o Initialization and destruction for non-local objects with
2829 static storage duration. (Local objects with static storage
2830 duration are initialized when their scope is first entered,
2831 and are cleaned up via atexit.)
2832 o Virtual function tables.
2834 All of these may cause others to be needed. For example,
2835 instantiating one function may cause another to be needed, and
2836 generating the initializer for an object may cause templates to be
2837 instantiated, etc., etc. */
2839 timevar_push (TV_VARCONST);
2841 emit_support_tinfos ();
2850 /* If there are templates that we've put off instantiating, do
2852 instantiate_pending_templates (retries);
2855 /* Write out virtual tables as required. Note that writing out
2856 the virtual table for a template class may cause the
2857 instantiation of members of that class. If we write out
2858 vtables then we remove the class from our list so we don't
2859 have to look at it again. */
2861 while (keyed_classes != NULL_TREE
2862 && maybe_emit_vtables (TREE_VALUE (keyed_classes)))
2865 keyed_classes = TREE_CHAIN (keyed_classes);
2871 tree next = TREE_CHAIN (t);
2875 if (maybe_emit_vtables (TREE_VALUE (next)))
2878 TREE_CHAIN (t) = TREE_CHAIN (next);
2883 next = TREE_CHAIN (t);
2887 /* Write out needed type info variables. We have to be careful
2888 looping through unemitted decls, because emit_tinfo_decl may
2889 cause other variables to be needed. New elements will be
2890 appended, and we remove from the vector those that actually
2892 for (i = VEC_length (tree, unemitted_tinfo_decls);
2893 VEC_iterate (tree, unemitted_tinfo_decls, --i, t);)
2894 if (emit_tinfo_decl (t))
2897 VEC_unordered_remove (tree, unemitted_tinfo_decls, i);
2900 /* The list of objects with static storage duration is built up
2901 in reverse order. We clear STATIC_AGGREGATES so that any new
2902 aggregates added during the initialization of these will be
2903 initialized in the correct order when we next come around the
2905 vars = prune_vars_needing_no_initialization (&static_aggregates);
2909 /* We need to start a new initialization function each time
2910 through the loop. That's because we need to know which
2911 vtables have been referenced, and TREE_SYMBOL_REFERENCED
2912 isn't computed until a function is finished, and written
2913 out. That's a deficiency in the back-end. When this is
2914 fixed, these initialization functions could all become
2915 inline, with resulting performance improvements. */
2918 /* Set the line and file, so that it is obviously not from
2920 input_location = locus;
2921 ssdf_body = start_static_storage_duration_function (ssdf_count);
2923 /* Make sure the back end knows about all the variables. */
2924 write_out_vars (vars);
2926 /* First generate code to do all the initializations. */
2928 do_static_initialization_or_destruction (vars, /*initp=*/true);
2930 /* Then, generate code to do all the destructions. Do these
2931 in reverse order so that the most recently constructed
2932 variable is the first destroyed. If we're using
2933 __cxa_atexit, then we don't need to do this; functions
2934 were registered at initialization time to destroy the
2936 if (!flag_use_cxa_atexit && vars)
2938 vars = nreverse (vars);
2939 do_static_initialization_or_destruction (vars, /*initp=*/false);
2944 /* Finish up the static storage duration function for this
2946 input_location = locus;
2947 finish_static_storage_duration_function (ssdf_body);
2949 /* All those initializations and finalizations might cause
2950 us to need more inline functions, more template
2951 instantiations, etc. */
2954 #ifdef USE_MAPPED_LOCATION
2961 /* Go through the set of inline functions whose bodies have not
2962 been emitted yet. If out-of-line copies of these functions
2963 are required, emit them. */
2964 for (i = 0; VEC_iterate (tree, deferred_fns, i, decl); ++i)
2966 /* Does it need synthesizing? */
2967 if (DECL_ARTIFICIAL (decl) && ! DECL_INITIAL (decl)
2968 && (! DECL_REALLY_EXTERN (decl) || DECL_INLINE (decl)))
2970 /* Even though we're already at the top-level, we push
2971 there again. That way, when we pop back a few lines
2972 hence, all of our state is restored. Otherwise,
2973 finish_function doesn't clean things up, and we end
2974 up with CURRENT_FUNCTION_DECL set. */
2975 push_to_top_level ();
2976 /* The decl's location will mark where it was first
2977 needed. Save that so synthesize method can indicate
2978 where it was needed from, in case of error */
2979 input_location = DECL_SOURCE_LOCATION (decl);
2980 synthesize_method (decl);
2981 pop_from_top_level ();
2985 if (!DECL_SAVED_TREE (decl))
2988 /* We lie to the back-end, pretending that some functions
2989 are not defined when they really are. This keeps these
2990 functions from being put out unnecessarily. But, we must
2991 stop lying when the functions are referenced, or if they
2992 are not comdat since they need to be put out now. If
2993 DECL_INTERFACE_KNOWN, then we have already set
2994 DECL_EXTERNAL appropriately, so there's no need to check
2995 again, and we do not want to clear DECL_EXTERNAL if a
2996 previous call to import_export_decl set it.
2998 This is done in a separate for cycle, because if some
2999 deferred function is contained in another deferred
3000 function later in deferred_fns varray,
3001 rest_of_compilation would skip this function and we
3002 really cannot expand the same function twice. */
3003 import_export_decl (decl);
3004 if (DECL_NOT_REALLY_EXTERN (decl)
3005 && DECL_INITIAL (decl)
3006 && decl_needed_p (decl))
3007 DECL_EXTERNAL (decl) = 0;
3009 /* If we're going to need to write this function out, and
3010 there's already a body for it, create RTL for it now.
3011 (There might be no body if this is a method we haven't
3012 gotten around to synthesizing yet.) */
3013 if (!DECL_EXTERNAL (decl)
3014 && decl_needed_p (decl)
3015 && !TREE_ASM_WRITTEN (decl)
3016 && !cgraph_node (decl)->local.finalized)
3018 /* We will output the function; no longer consider it in this
3020 DECL_DEFER_OUTPUT (decl) = 0;
3021 /* Generate RTL for this function now that we know we
3023 expand_or_defer_fn (decl);
3024 /* If we're compiling -fsyntax-only pretend that this
3025 function has been written out so that we don't try to
3027 if (flag_syntax_only)
3028 TREE_ASM_WRITTEN (decl) = 1;
3033 if (walk_namespaces (wrapup_globals_for_namespace, /*data=*/0))
3036 /* Static data members are just like namespace-scope globals. */
3037 for (i = 0; VEC_iterate (tree, pending_statics, i, decl); ++i)
3039 if (var_finalized_p (decl) || DECL_REALLY_EXTERN (decl))
3041 import_export_decl (decl);
3042 /* If this static data member is needed, provide it to the
3044 if (DECL_NOT_REALLY_EXTERN (decl) && decl_needed_p (decl))
3045 DECL_EXTERNAL (decl) = 0;
3047 if (VEC_length (tree, pending_statics) != 0
3048 && wrapup_global_declarations (VEC_address (tree, pending_statics),
3049 VEC_length (tree, pending_statics)))
3056 /* All used inline functions must have a definition at this point. */
3057 for (i = 0; VEC_iterate (tree, deferred_fns, i, decl); ++i)
3059 if (/* Check online inline functions that were actually used. */
3060 TREE_USED (decl) && DECL_DECLARED_INLINE_P (decl)
3061 /* If the definition actually was available here, then the
3062 fact that the function was not defined merely represents
3063 that for some reason (use of a template repository,
3064 #pragma interface, etc.) we decided not to emit the
3066 && !DECL_INITIAL (decl)
3067 /* An explicit instantiation can be used to specify
3068 that the body is in another unit. It will have
3069 already verified there was a definition. */
3070 && !DECL_EXPLICIT_INSTANTIATION (decl))
3072 warning (0, "inline function %q+D used but never defined", decl);
3073 /* Avoid a duplicate warning from check_global_declaration_1. */
3074 TREE_NO_WARNING (decl) = 1;
3078 /* We give C linkage to static constructors and destructors. */
3079 push_lang_context (lang_name_c);
3081 /* Generate initialization and destruction functions for all
3082 priorities for which they are required. */
3083 if (priority_info_map)
3084 splay_tree_foreach (priority_info_map,
3085 generate_ctor_and_dtor_functions_for_priority,
3089 /* If we have a ctor or this is obj-c++ and we need a static init,
3090 call generate_ctor_or_dtor_function. */
3091 if (static_ctors || (c_dialect_objc () && objc_static_init_needed_p ()))
3092 generate_ctor_or_dtor_function (/*constructor_p=*/true,
3093 DEFAULT_INIT_PRIORITY, &locus);
3095 generate_ctor_or_dtor_function (/*constructor_p=*/false,
3096 DEFAULT_INIT_PRIORITY, &locus);
3099 /* We're done with the splay-tree now. */
3100 if (priority_info_map)
3101 splay_tree_delete (priority_info_map);
3103 /* Generate any missing aliases. */
3104 maybe_apply_pending_pragma_weaks ();
3106 /* We're done with static constructors, so we can go back to "C++"
3108 pop_lang_context ();
3110 cgraph_finalize_compilation_unit ();
3113 /* Now, issue warnings about static, but not defined, functions,
3114 etc., and emit debugging information. */
3115 walk_namespaces (wrapup_globals_for_namespace, /*data=*/&reconsider);
3116 if (VEC_length (tree, pending_statics) != 0)
3118 check_global_declarations (VEC_address (tree, pending_statics),
3119 VEC_length (tree, pending_statics));
3120 emit_debug_global_declarations (VEC_address (tree, pending_statics),
3121 VEC_length (tree, pending_statics));
3124 /* Generate hidden aliases for Java. */
3125 build_java_method_aliases ();
3129 /* The entire file is now complete. If requested, dump everything
3133 FILE *stream = dump_begin (TDI_tu, &flags);
3137 dump_node (global_namespace, flags & ~TDF_SLIM, stream);
3138 dump_end (TDI_tu, stream);
3142 timevar_pop (TV_VARCONST);
3144 if (flag_detailed_statistics)
3146 dump_tree_statistics ();
3147 dump_time_statistics ();
3149 input_location = locus;
3151 #ifdef ENABLE_CHECKING
3152 validate_conversion_obstack ();
3153 #endif /* ENABLE_CHECKING */
3156 /* FN is an OFFSET_REF, DOTSTAR_EXPR or MEMBER_REF indicating the
3157 function to call in parse-tree form; it has not yet been
3158 semantically analyzed. ARGS are the arguments to the function.
3159 They have already been semantically analyzed. */
3162 build_offset_ref_call_from_tree (tree fn, tree args)
3171 object = TREE_OPERAND (fn, 0);
3173 if (processing_template_decl)
3175 gcc_assert (TREE_CODE (fn) == DOTSTAR_EXPR
3176 || TREE_CODE (fn) == MEMBER_REF);
3177 if (type_dependent_expression_p (fn)
3178 || any_type_dependent_arguments_p (args))
3179 return build_min_nt (CALL_EXPR, fn, args, NULL_TREE);
3181 /* Transform the arguments and add the implicit "this"
3182 parameter. That must be done before the FN is transformed
3183 because we depend on the form of FN. */
3184 args = build_non_dependent_args (args);
3185 if (TREE_CODE (fn) == DOTSTAR_EXPR)
3186 object = build_unary_op (ADDR_EXPR, object, 0);
3187 object = build_non_dependent_expr (object);
3188 args = tree_cons (NULL_TREE, object, args);
3189 /* Now that the arguments are done, transform FN. */
3190 fn = build_non_dependent_expr (fn);
3193 /* A qualified name corresponding to a bound pointer-to-member is
3194 represented as an OFFSET_REF:
3196 struct B { void g(); };
3198 void B::g() { (this->*p)(); } */
3199 if (TREE_CODE (fn) == OFFSET_REF)
3201 tree object_addr = build_unary_op (ADDR_EXPR, object, 0);
3202 fn = TREE_OPERAND (fn, 1);
3203 fn = get_member_function_from_ptrfunc (&object_addr, fn);
3204 args = tree_cons (NULL_TREE, object_addr, args);
3207 expr = build_function_call (fn, args);
3208 if (processing_template_decl && expr != error_mark_node)
3209 return build_min_non_dep (CALL_EXPR, expr, orig_fn, orig_args, NULL_TREE);
3215 check_default_args (tree x)
3217 tree arg = TYPE_ARG_TYPES (TREE_TYPE (x));
3218 bool saw_def = false;
3219 int i = 0 - (TREE_CODE (TREE_TYPE (x)) == METHOD_TYPE);
3220 for (; arg && arg != void_list_node; arg = TREE_CHAIN (arg), ++i)
3222 if (TREE_PURPOSE (arg))
3226 error ("default argument missing for parameter %P of %q+#D", i, x);
3227 TREE_PURPOSE (arg) = error_mark_node;
3232 /* Mark DECL (either a _DECL or a BASELINK) as "used" in the program.
3233 If DECL is a specialization or implicitly declared class member,
3234 generate the actual definition. */
3237 mark_used (tree decl)
3239 HOST_WIDE_INT saved_processing_template_decl = 0;
3241 /* If DECL is a BASELINK for a single function, then treat it just
3242 like the DECL for the function. Otherwise, if the BASELINK is
3243 for an overloaded function, we don't know which function was
3244 actually used until after overload resolution. */
3245 if (TREE_CODE (decl) == BASELINK)
3247 decl = BASELINK_FUNCTIONS (decl);
3248 if (really_overloaded_fn (decl))
3250 decl = OVL_CURRENT (decl);
3253 TREE_USED (decl) = 1;
3254 /* If we don't need a value, then we don't need to synthesize DECL. */
3255 if (skip_evaluation)
3257 /* Normally, we can wait until instantiation-time to synthesize
3258 DECL. However, if DECL is a static data member initialized with
3259 a constant, we need the value right now because a reference to
3260 such a data member is not value-dependent. */
3261 if (TREE_CODE (decl) == VAR_DECL
3262 && DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl)
3263 && DECL_CLASS_SCOPE_P (decl))
3265 /* Don't try to instantiate members of dependent types. We
3266 cannot just use dependent_type_p here because this function
3267 may be called from fold_non_dependent_expr, and then we may
3268 see dependent types, even though processing_template_decl
3270 if (CLASSTYPE_TEMPLATE_INFO ((DECL_CONTEXT (decl)))
3271 && uses_template_parms (CLASSTYPE_TI_ARGS (DECL_CONTEXT (decl))))
3273 /* Pretend that we are not in a template, even if we are, so
3274 that the static data member initializer will be processed. */
3275 saved_processing_template_decl = processing_template_decl;
3276 processing_template_decl = 0;
3279 if (processing_template_decl)
3282 if (TREE_CODE (decl) == FUNCTION_DECL && DECL_DECLARED_INLINE_P (decl)
3283 && !TREE_ASM_WRITTEN (decl))
3284 /* Remember it, so we can check it was defined. */
3286 if (DECL_DEFERRED_FN (decl))
3289 /* Remember the current location for a function we will end up
3290 synthesizing. Then we can inform the user where it was
3291 required in the case of error. */
3292 if (DECL_ARTIFICIAL (decl) && DECL_NONSTATIC_MEMBER_FUNCTION_P (decl)
3293 && !DECL_THUNK_P (decl))
3294 DECL_SOURCE_LOCATION (decl) = input_location;
3296 note_vague_linkage_fn (decl);
3299 assemble_external (decl);
3301 /* Is it a synthesized method that needs to be synthesized? */
3302 if (TREE_CODE (decl) == FUNCTION_DECL
3303 && DECL_NONSTATIC_MEMBER_FUNCTION_P (decl)
3304 && DECL_ARTIFICIAL (decl)
3305 && !DECL_THUNK_P (decl)
3306 && ! DECL_INITIAL (decl)
3307 /* Kludge: don't synthesize for default args. Unfortunately this
3308 rules out initializers of namespace-scoped objects too, but
3309 it's sort-of ok if the implicit ctor or dtor decl keeps
3310 pointing to the class location. */
3311 && current_function_decl)
3313 synthesize_method (decl);
3314 /* If we've already synthesized the method we don't need to
3315 do the instantiation test below. */
3317 else if ((DECL_NON_THUNK_FUNCTION_P (decl) || TREE_CODE (decl) == VAR_DECL)
3318 && DECL_LANG_SPECIFIC (decl) && DECL_TEMPLATE_INFO (decl)
3319 && (!DECL_EXPLICIT_INSTANTIATION (decl)
3320 || (TREE_CODE (decl) == FUNCTION_DECL
3321 && DECL_INLINE (DECL_TEMPLATE_RESULT
3322 (template_for_substitution (decl))))
3323 /* We need to instantiate static data members so that there
3324 initializers are available in integral constant
3326 || (TREE_CODE (decl) == VAR_DECL
3327 && DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl))))
3328 /* If this is a function or variable that is an instance of some
3329 template, we now know that we will need to actually do the
3330 instantiation. We check that DECL is not an explicit
3331 instantiation because that is not checked in instantiate_decl.
3333 We put off instantiating functions in order to improve compile
3334 times. Maintaining a stack of active functions is expensive,
3335 and the inliner knows to instantiate any functions it might
3336 need. Therefore, we always try to defer instantiation. */
3337 instantiate_decl (decl, /*defer_ok=*/true,
3338 /*expl_inst_class_mem_p=*/false);
3340 processing_template_decl = saved_processing_template_decl;
3343 #include "gt-cp-decl2.h"