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 type_quals = quals & ~TYPE_QUAL_RESTRICT;
118 ctype = cp_build_qualified_type (ctype, type_quals);
119 fntype = build_method_type_directly (ctype, TREE_TYPE (fntype),
120 (TREE_CODE (fntype) == METHOD_TYPE
121 ? TREE_CHAIN (TYPE_ARG_TYPES (fntype))
122 : TYPE_ARG_TYPES (fntype)));
123 raises = TYPE_RAISES_EXCEPTIONS (fntype);
125 fntype = build_exception_variant (fntype, raises);
130 /* Build a PARM_DECL with NAME and TYPE, and set DECL_ARG_TYPE
134 cp_build_parm_decl (tree name, tree type)
136 tree parm = build_decl (PARM_DECL, name, type);
137 /* DECL_ARG_TYPE is only used by the back end and the back end never
139 if (!processing_template_decl)
140 DECL_ARG_TYPE (parm) = type_passed_as (type);
144 /* Returns a PARM_DECL for a parameter of the indicated TYPE, with the
148 build_artificial_parm (tree name, tree type)
150 tree parm = cp_build_parm_decl (name, type);
151 DECL_ARTIFICIAL (parm) = 1;
152 /* All our artificial parms are implicitly `const'; they cannot be
154 TREE_READONLY (parm) = 1;
158 /* Constructors for types with virtual baseclasses need an "in-charge" flag
159 saying whether this constructor is responsible for initialization of
160 virtual baseclasses or not. All destructors also need this "in-charge"
161 flag, which additionally determines whether or not the destructor should
162 free the memory for the object.
164 This function adds the "in-charge" flag to member function FN if
165 appropriate. It is called from grokclassfn and tsubst.
166 FN must be either a constructor or destructor.
168 The in-charge flag follows the 'this' parameter, and is followed by the
169 VTT parm (if any), then the user-written parms. */
172 maybe_retrofit_in_chrg (tree fn)
174 tree basetype, arg_types, parms, parm, fntype;
176 /* If we've already add the in-charge parameter don't do it again. */
177 if (DECL_HAS_IN_CHARGE_PARM_P (fn))
180 /* When processing templates we can't know, in general, whether or
181 not we're going to have virtual baseclasses. */
182 if (processing_template_decl)
185 /* We don't need an in-charge parameter for constructors that don't
186 have virtual bases. */
187 if (DECL_CONSTRUCTOR_P (fn)
188 && !CLASSTYPE_VBASECLASSES (DECL_CONTEXT (fn)))
191 arg_types = TYPE_ARG_TYPES (TREE_TYPE (fn));
192 basetype = TREE_TYPE (TREE_VALUE (arg_types));
193 arg_types = TREE_CHAIN (arg_types);
195 parms = TREE_CHAIN (DECL_ARGUMENTS (fn));
197 /* If this is a subobject constructor or destructor, our caller will
198 pass us a pointer to our VTT. */
199 if (CLASSTYPE_VBASECLASSES (DECL_CONTEXT (fn)))
201 parm = build_artificial_parm (vtt_parm_identifier, vtt_parm_type);
203 /* First add it to DECL_ARGUMENTS between 'this' and the real args... */
204 TREE_CHAIN (parm) = parms;
207 /* ...and then to TYPE_ARG_TYPES. */
208 arg_types = hash_tree_chain (vtt_parm_type, arg_types);
210 DECL_HAS_VTT_PARM_P (fn) = 1;
213 /* Then add the in-charge parm (before the VTT parm). */
214 parm = build_artificial_parm (in_charge_identifier, integer_type_node);
215 TREE_CHAIN (parm) = parms;
217 arg_types = hash_tree_chain (integer_type_node, arg_types);
219 /* Insert our new parameter(s) into the list. */
220 TREE_CHAIN (DECL_ARGUMENTS (fn)) = parms;
222 /* And rebuild the function type. */
223 fntype = build_method_type_directly (basetype, TREE_TYPE (TREE_TYPE (fn)),
225 if (TYPE_RAISES_EXCEPTIONS (TREE_TYPE (fn)))
226 fntype = build_exception_variant (fntype,
227 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (fn)));
228 TREE_TYPE (fn) = fntype;
230 /* Now we've got the in-charge parameter. */
231 DECL_HAS_IN_CHARGE_PARM_P (fn) = 1;
234 /* Classes overload their constituent function names automatically.
235 When a function name is declared in a record structure,
236 its name is changed to it overloaded name. Since names for
237 constructors and destructors can conflict, we place a leading
240 CNAME is the name of the class we are grokking for.
242 FUNCTION is a FUNCTION_DECL. It was created by `grokdeclarator'.
244 FLAGS contains bits saying what's special about today's
245 arguments. 1 == DESTRUCTOR. 2 == OPERATOR.
247 If FUNCTION is a destructor, then we must add the `auto-delete' field
248 as a second parameter. There is some hair associated with the fact
249 that we must "declare" this variable in the manner consistent with the
250 way the rest of the arguments were declared.
252 QUALS are the qualifiers for the this pointer. */
255 grokclassfn (tree ctype, tree function, enum overload_flags flags)
257 tree fn_name = DECL_NAME (function);
259 /* Even within an `extern "C"' block, members get C++ linkage. See
260 [dcl.link] for details. */
261 SET_DECL_LANGUAGE (function, lang_cplusplus);
263 if (fn_name == NULL_TREE)
265 error ("name missing for member function");
266 fn_name = get_identifier ("<anonymous>");
267 DECL_NAME (function) = fn_name;
270 DECL_CONTEXT (function) = ctype;
272 if (flags == DTOR_FLAG)
273 DECL_DESTRUCTOR_P (function) = 1;
275 if (flags == DTOR_FLAG || DECL_CONSTRUCTOR_P (function))
276 maybe_retrofit_in_chrg (function);
279 /* Create an ARRAY_REF, checking for the user doing things backwards
283 grok_array_decl (tree array_expr, tree index_exp)
287 tree orig_array_expr = array_expr;
288 tree orig_index_exp = index_exp;
290 if (error_operand_p (array_expr) || error_operand_p (index_exp))
291 return error_mark_node;
293 if (processing_template_decl)
295 if (type_dependent_expression_p (array_expr)
296 || type_dependent_expression_p (index_exp))
297 return build_min_nt (ARRAY_REF, array_expr, index_exp,
298 NULL_TREE, NULL_TREE);
299 array_expr = build_non_dependent_expr (array_expr);
300 index_exp = build_non_dependent_expr (index_exp);
303 type = TREE_TYPE (array_expr);
305 type = non_reference (type);
307 /* If they have an `operator[]', use that. */
308 if (IS_AGGR_TYPE (type) || IS_AGGR_TYPE (TREE_TYPE (index_exp)))
309 expr = build_new_op (ARRAY_REF, LOOKUP_NORMAL,
310 array_expr, index_exp, NULL_TREE,
311 /*overloaded_p=*/NULL);
316 /* Otherwise, create an ARRAY_REF for a pointer or array type.
317 It is a little-known fact that, if `a' is an array and `i' is
318 an int, you can write `i[a]', which means the same thing as
320 if (TREE_CODE (type) == ARRAY_TYPE)
323 p1 = build_expr_type_conversion (WANT_POINTER, array_expr, false);
325 if (TREE_CODE (TREE_TYPE (index_exp)) == ARRAY_TYPE)
328 p2 = build_expr_type_conversion (WANT_POINTER, index_exp, false);
330 i1 = build_expr_type_conversion (WANT_INT | WANT_ENUM, array_expr,
332 i2 = build_expr_type_conversion (WANT_INT | WANT_ENUM, index_exp,
335 if ((p1 && i2) && (i1 && p2))
336 error ("ambiguous conversion for array subscript");
339 array_expr = p1, index_exp = i2;
341 array_expr = p2, index_exp = i1;
344 error ("invalid types %<%T[%T]%> for array subscript",
345 type, TREE_TYPE (index_exp));
346 return error_mark_node;
349 if (array_expr == error_mark_node || index_exp == error_mark_node)
350 error ("ambiguous conversion for array subscript");
352 expr = build_array_ref (array_expr, index_exp);
354 if (processing_template_decl && expr != error_mark_node)
355 return build_min_non_dep (ARRAY_REF, expr, orig_array_expr, orig_index_exp,
356 NULL_TREE, NULL_TREE);
360 /* Given the cast expression EXP, checking out its validity. Either return
361 an error_mark_node if there was an unavoidable error, return a cast to
362 void for trying to delete a pointer w/ the value 0, or return the
363 call to delete. If DOING_VEC is true, we handle things differently
364 for doing an array delete.
365 Implements ARM $5.3.4. This is called from the parser. */
368 delete_sanity (tree exp, tree size, bool doing_vec, int use_global_delete)
372 if (exp == error_mark_node)
375 if (processing_template_decl)
377 t = build_min (DELETE_EXPR, void_type_node, exp, size);
378 DELETE_EXPR_USE_GLOBAL (t) = use_global_delete;
379 DELETE_EXPR_USE_VEC (t) = doing_vec;
380 TREE_SIDE_EFFECTS (t) = 1;
384 /* An array can't have been allocated by new, so complain. */
385 if (TREE_CODE (exp) == VAR_DECL
386 && TREE_CODE (TREE_TYPE (exp)) == ARRAY_TYPE)
387 warning (0, "deleting array %q#D", exp);
389 t = build_expr_type_conversion (WANT_POINTER, exp, true);
391 if (t == NULL_TREE || t == error_mark_node)
393 error ("type %q#T argument given to %<delete%>, expected pointer",
395 return error_mark_node;
398 type = TREE_TYPE (t);
400 /* As of Valley Forge, you can delete a pointer to const. */
402 /* You can't delete functions. */
403 if (TREE_CODE (TREE_TYPE (type)) == FUNCTION_TYPE)
405 error ("cannot delete a function. Only pointer-to-objects are "
406 "valid arguments to %<delete%>");
407 return error_mark_node;
410 /* Deleting ptr to void is undefined behavior [expr.delete/3]. */
411 if (TREE_CODE (TREE_TYPE (type)) == VOID_TYPE)
413 warning (0, "deleting %qT is undefined", type);
417 /* Deleting a pointer with the value zero is valid and has no effect. */
418 if (integer_zerop (t))
419 return build1 (NOP_EXPR, void_type_node, t);
422 return build_vec_delete (t, /*maxindex=*/NULL_TREE,
423 sfk_deleting_destructor,
426 return build_delete (type, t, sfk_deleting_destructor,
427 LOOKUP_NORMAL, use_global_delete);
430 /* Report an error if the indicated template declaration is not the
431 sort of thing that should be a member template. */
434 check_member_template (tree tmpl)
438 gcc_assert (TREE_CODE (tmpl) == TEMPLATE_DECL);
439 decl = DECL_TEMPLATE_RESULT (tmpl);
441 if (TREE_CODE (decl) == FUNCTION_DECL
442 || (TREE_CODE (decl) == TYPE_DECL
443 && IS_AGGR_TYPE (TREE_TYPE (decl))))
445 if (current_function_decl)
446 /* 14.5.2.2 [temp.mem]
448 A local class shall not have member templates. */
449 error ("invalid declaration of member template %q#D in local class",
452 if (TREE_CODE (decl) == FUNCTION_DECL && DECL_VIRTUAL_P (decl))
454 /* 14.5.2.3 [temp.mem]
456 A member function template shall not be virtual. */
458 ("invalid use of %<virtual%> in template declaration of %q#D",
460 DECL_VIRTUAL_P (decl) = 0;
463 /* The debug-information generating code doesn't know what to do
464 with member templates. */
465 DECL_IGNORED_P (tmpl) = 1;
468 error ("template declaration of %q#D", decl);
471 /* Return true iff TYPE is a valid Java parameter or return type. */
474 acceptable_java_type (tree type)
476 if (TREE_CODE (type) == VOID_TYPE || TYPE_FOR_JAVA (type))
478 if (TREE_CODE (type) == POINTER_TYPE || TREE_CODE (type) == REFERENCE_TYPE)
480 type = TREE_TYPE (type);
481 if (TREE_CODE (type) == RECORD_TYPE)
484 if (! TYPE_FOR_JAVA (type))
486 if (! CLASSTYPE_TEMPLATE_INFO (type))
488 args = CLASSTYPE_TI_ARGS (type);
489 i = TREE_VEC_LENGTH (args);
492 type = TREE_VEC_ELT (args, i);
493 if (TREE_CODE (type) == POINTER_TYPE)
494 type = TREE_TYPE (type);
495 if (! TYPE_FOR_JAVA (type))
504 /* For a METHOD in a Java class CTYPE, return true if
505 the parameter and return types are valid Java types.
506 Otherwise, print appropriate error messages, and return false. */
509 check_java_method (tree method)
512 tree arg_types = TYPE_ARG_TYPES (TREE_TYPE (method));
513 tree ret_type = TREE_TYPE (TREE_TYPE (method));
515 if (!acceptable_java_type (ret_type))
517 error ("Java method %qD has non-Java return type %qT",
522 arg_types = TREE_CHAIN (arg_types);
523 if (DECL_HAS_IN_CHARGE_PARM_P (method))
524 arg_types = TREE_CHAIN (arg_types);
525 if (DECL_HAS_VTT_PARM_P (method))
526 arg_types = TREE_CHAIN (arg_types);
528 for (; arg_types != NULL_TREE; arg_types = TREE_CHAIN (arg_types))
530 tree type = TREE_VALUE (arg_types);
531 if (!acceptable_java_type (type))
533 error ("Java method %qD has non-Java parameter type %qT",
541 /* Sanity check: report error if this function FUNCTION is not
542 really a member of the class (CTYPE) it is supposed to belong to.
543 TEMPLATE_PARMS is used to specify the template parameters of a member
544 template passed as FUNCTION_DECL. If the member template is passed as a
545 TEMPLATE_DECL, it can be NULL since the parameters can be extracted
546 from the declaration. If the function is not a function template, it
548 It returns the original declaration for the function, or NULL_TREE
549 if no declaration was found (and an error was emitted). */
552 check_classfn (tree ctype, tree function, tree template_parms)
557 if (DECL_USE_TEMPLATE (function)
558 && !(TREE_CODE (function) == TEMPLATE_DECL
559 && DECL_TEMPLATE_SPECIALIZATION (function))
560 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (function)))
561 /* Since this is a specialization of a member template,
562 we're not going to find the declaration in the class.
565 struct S { template <typename T> void f(T); };
566 template <> void S::f(int);
568 we're not going to find `S::f(int)', but there's no
569 reason we should, either. We let our callers know we didn't
570 find the method, but we don't complain. */
573 /* Basic sanity check: for a template function, the template parameters
574 either were not passed, or they are the same of DECL_TEMPLATE_PARMS. */
575 if (TREE_CODE (function) == TEMPLATE_DECL)
577 gcc_assert (!template_parms
578 || comp_template_parms (template_parms,
579 DECL_TEMPLATE_PARMS (function)));
580 template_parms = DECL_TEMPLATE_PARMS (function);
583 /* OK, is this a definition of a member template? */
584 is_template = (template_parms != NULL_TREE);
586 ix = class_method_index_for_fn (complete_type (ctype), function);
589 VEC(tree,gc) *methods = CLASSTYPE_METHOD_VEC (ctype);
590 tree fndecls, fndecl = 0;
593 const char *format = NULL;
595 pushed_scope = push_scope (ctype);
596 for (fndecls = VEC_index (tree, methods, ix);
597 fndecls; fndecls = OVL_NEXT (fndecls))
601 fndecl = OVL_CURRENT (fndecls);
602 p1 = TYPE_ARG_TYPES (TREE_TYPE (function));
603 p2 = TYPE_ARG_TYPES (TREE_TYPE (fndecl));
605 /* We cannot simply call decls_match because this doesn't
606 work for static member functions that are pretending to
607 be methods, and because the name may have been changed by
610 /* Get rid of the this parameter on functions that become
612 if (DECL_STATIC_FUNCTION_P (fndecl)
613 && TREE_CODE (TREE_TYPE (function)) == METHOD_TYPE)
614 p1 = TREE_CHAIN (p1);
616 /* A member template definition only matches a member template
618 if (is_template != (TREE_CODE (fndecl) == TEMPLATE_DECL))
621 if (same_type_p (TREE_TYPE (TREE_TYPE (function)),
622 TREE_TYPE (TREE_TYPE (fndecl)))
623 && compparms (p1, p2)
625 || comp_template_parms (template_parms,
626 DECL_TEMPLATE_PARMS (fndecl)))
627 && (DECL_TEMPLATE_SPECIALIZATION (function)
628 == DECL_TEMPLATE_SPECIALIZATION (fndecl))
629 && (!DECL_TEMPLATE_SPECIALIZATION (function)
630 || (DECL_TI_TEMPLATE (function)
631 == DECL_TI_TEMPLATE (fndecl))))
635 pop_scope (pushed_scope);
637 return OVL_CURRENT (fndecls);
638 error ("prototype for %q#D does not match any in class %qT",
640 is_conv_op = DECL_CONV_FN_P (fndecl);
643 ix = CLASSTYPE_FIRST_CONVERSION_SLOT;
644 fndecls = VEC_index (tree, methods, ix);
647 fndecl = OVL_CURRENT (fndecls);
648 fndecls = OVL_NEXT (fndecls);
650 if (!fndecls && is_conv_op)
652 if (VEC_length (tree, methods) > (size_t) ++ix)
654 fndecls = VEC_index (tree, methods, ix);
655 if (!DECL_CONV_FN_P (OVL_CURRENT (fndecls)))
667 format = N_("candidates are: %+#D");
669 format = N_("candidate is: %+#D");
670 error (format, fndecl);
673 else if (!COMPLETE_TYPE_P (ctype))
674 cxx_incomplete_type_error (function, ctype);
676 error ("no %q#D member function declared in class %qT",
679 /* If we did not find the method in the class, add it to avoid
680 spurious errors (unless the CTYPE is not yet defined, in which
681 case we'll only confuse ourselves when the function is declared
682 properly within the class. */
683 if (COMPLETE_TYPE_P (ctype))
684 add_method (ctype, function, NULL_TREE);
688 /* DECL is a function with vague linkage. Remember it so that at the
689 end of the translation unit we can decide whether or not to emit
693 note_vague_linkage_fn (tree decl)
695 if (!DECL_DEFERRED_FN (decl))
697 DECL_DEFERRED_FN (decl) = 1;
698 DECL_DEFER_OUTPUT (decl) = 1;
699 VEC_safe_push (tree, gc, deferred_fns, decl);
703 /* Like note_vague_linkage_fn but for variables. */
706 note_vague_linkage_var (tree var)
708 VEC_safe_push (tree, gc, pending_statics, var);
711 /* We have just processed the DECL, which is a static data member.
712 The other parameters are as for cp_finish_decl. */
715 finish_static_data_member_decl (tree decl,
716 tree init, bool init_const_expr_p,
720 gcc_assert (TREE_PUBLIC (decl));
722 DECL_CONTEXT (decl) = current_class_type;
724 /* We cannot call pushdecl here, because that would fill in the
725 TREE_CHAIN of our decl. Instead, we modify cp_finish_decl to do
726 the right thing, namely, to put this decl out straight away. */
727 /* current_class_type can be NULL_TREE in case of error. */
728 if (!asmspec_tree && current_class_type)
729 DECL_INITIAL (decl) = error_mark_node;
731 if (! processing_template_decl)
732 note_vague_linkage_var (decl);
734 if (LOCAL_CLASS_P (current_class_type))
735 pedwarn ("local class %q#T shall not have static data member %q#D",
736 current_class_type, decl);
738 /* Static consts need not be initialized in the class definition. */
739 if (init != NULL_TREE && TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl)))
741 static int explained = 0;
743 error ("initializer invalid for static member with constructor");
746 error ("(an out of class initialization is required)");
751 /* Force the compiler to know when an uninitialized static const
752 member is being used. */
753 if (CP_TYPE_CONST_P (TREE_TYPE (decl)) && init == 0)
754 TREE_USED (decl) = 1;
755 DECL_INITIAL (decl) = init;
756 DECL_IN_AGGR_P (decl) = 1;
758 cp_finish_decl (decl, init, init_const_expr_p, asmspec_tree, flags);
761 /* DECLARATOR and DECLSPECS correspond to a class member. The other
762 parameters are as for cp_finish_decl. Return the DECL for the
763 class member declared. */
766 grokfield (const cp_declarator *declarator,
767 cp_decl_specifier_seq *declspecs,
768 tree init, bool init_const_expr_p,
773 const char *asmspec = 0;
774 int flags = LOOKUP_ONLYCONVERTING;
776 if (!declspecs->any_specifiers_p
777 && declarator->kind == cdk_id
778 && declarator->u.id.qualifying_scope
779 && TREE_CODE (declarator->u.id.unqualified_name) == IDENTIFIER_NODE)
780 /* Access declaration */
781 return do_class_using_decl (declarator->u.id.qualifying_scope,
782 declarator->u.id.unqualified_name);
785 && TREE_CODE (init) == TREE_LIST
786 && TREE_VALUE (init) == error_mark_node
787 && TREE_CHAIN (init) == NULL_TREE)
790 value = grokdeclarator (declarator, declspecs, FIELD, init != 0, &attrlist);
791 if (! value || error_operand_p (value))
792 /* friend or constructor went bad. */
793 return error_mark_node;
795 if (TREE_CODE (value) == TYPE_DECL && init)
797 error ("typedef %qD is initialized (use __typeof__ instead)", value);
801 /* Pass friendly classes back. */
802 if (value == void_type_node)
805 /* Pass friend decls back. */
806 if ((TREE_CODE (value) == FUNCTION_DECL
807 || TREE_CODE (value) == TEMPLATE_DECL)
808 && DECL_CONTEXT (value) != current_class_type)
811 if (DECL_NAME (value) != NULL_TREE
812 && IDENTIFIER_POINTER (DECL_NAME (value))[0] == '_'
813 && ! strcmp (IDENTIFIER_POINTER (DECL_NAME (value)), "_vptr"))
814 error ("member %qD conflicts with virtual function table field name",
817 /* Stash away type declarations. */
818 if (TREE_CODE (value) == TYPE_DECL)
820 DECL_NONLOCAL (value) = 1;
821 DECL_CONTEXT (value) = current_class_type;
823 if (processing_template_decl)
824 value = push_template_decl (value);
828 /* Avoid storing attributes in template parameters:
829 tsubst is not ready to handle them. */
830 tree type = TREE_TYPE (value);
831 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM
832 || TREE_CODE (type) == BOUND_TEMPLATE_TEMPLATE_PARM)
833 sorry ("applying attributes to template parameters is not implemented");
835 cplus_decl_attributes (&value, attrlist, 0);
841 if (DECL_IN_AGGR_P (value))
843 error ("%qD is already defined in %qT", value, DECL_CONTEXT (value));
844 return void_type_node;
848 asmspec = TREE_STRING_POINTER (asmspec_tree);
852 if (TREE_CODE (value) == FUNCTION_DECL)
854 /* Initializers for functions are rejected early in the parser.
855 If we get here, it must be a pure specifier for a method. */
856 if (TREE_CODE (TREE_TYPE (value)) == METHOD_TYPE)
858 gcc_assert (error_operand_p (init) || integer_zerop (init));
859 DECL_PURE_VIRTUAL_P (value) = 1;
863 gcc_assert (TREE_CODE (TREE_TYPE (value)) == FUNCTION_TYPE);
864 error ("initializer specified for static member function %qD",
868 else if (pedantic && TREE_CODE (value) != VAR_DECL)
869 /* Already complained in grokdeclarator. */
871 else if (!processing_template_decl)
873 if (TREE_CODE (init) == CONSTRUCTOR)
874 init = digest_init (TREE_TYPE (value), init);
876 init = integral_constant_value (init);
878 if (init != error_mark_node && !TREE_CONSTANT (init))
880 /* We can allow references to things that are effectively
881 static, since references are initialized with the
883 if (TREE_CODE (TREE_TYPE (value)) != REFERENCE_TYPE
884 || (TREE_STATIC (init) == 0
885 && (!DECL_P (init) || DECL_EXTERNAL (init) == 0)))
887 error ("field initializer is not constant");
888 init = error_mark_node;
894 if (processing_template_decl
895 && (TREE_CODE (value) == VAR_DECL || TREE_CODE (value) == FUNCTION_DECL))
897 value = push_template_decl (value);
898 if (error_operand_p (value))
899 return error_mark_node;
903 cplus_decl_attributes (&value, attrlist, 0);
905 switch (TREE_CODE (value))
908 finish_static_data_member_decl (value, init, init_const_expr_p,
909 asmspec_tree, flags);
914 error ("%<asm%> specifiers are not permitted on non-static data members");
915 if (DECL_INITIAL (value) == error_mark_node)
916 init = error_mark_node;
917 cp_finish_decl (value, init, /*init_const_expr_p=*/false,
919 DECL_INITIAL (value) = init;
920 DECL_IN_AGGR_P (value) = 1;
925 set_user_assembler_name (value, asmspec);
927 cp_finish_decl (value, init, /*init_const_expr_p=*/false,
928 asmspec_tree, flags);
930 /* Pass friends back this way. */
931 if (DECL_FRIEND_P (value))
932 return void_type_node;
934 DECL_IN_AGGR_P (value) = 1;
943 /* Like `grokfield', but for bitfields.
944 WIDTH is non-NULL for bit fields only, and is an INTEGER_CST node. */
947 grokbitfield (const cp_declarator *declarator,
948 cp_decl_specifier_seq *declspecs, tree width)
950 tree value = grokdeclarator (declarator, declspecs, BITFIELD, 0, NULL);
952 if (! value) return NULL_TREE; /* friends went bad. */
954 /* Pass friendly classes back. */
955 if (TREE_CODE (value) == VOID_TYPE)
956 return void_type_node;
958 if (TREE_CODE (value) == TYPE_DECL)
960 error ("cannot declare %qD to be a bit-field type", value);
964 /* Usually, finish_struct_1 catches bitfields with invalid types.
965 But, in the case of bitfields with function type, we confuse
966 ourselves into thinking they are member functions, so we must
968 if (TREE_CODE (value) == FUNCTION_DECL)
970 error ("cannot declare bit-field %qD with function type",
975 if (DECL_IN_AGGR_P (value))
977 error ("%qD is already defined in the class %qT", value,
978 DECL_CONTEXT (value));
979 return void_type_node;
982 if (TREE_STATIC (value))
984 error ("static member %qD cannot be a bit-field", value);
987 finish_decl (value, NULL_TREE, NULL_TREE);
989 if (width != error_mark_node)
991 constant_expression_warning (width);
992 DECL_INITIAL (value) = width;
993 SET_DECL_C_BIT_FIELD (value);
996 DECL_IN_AGGR_P (value) = 1;
1002 cplus_decl_attributes (tree *decl, tree attributes, int flags)
1004 if (*decl == NULL_TREE || *decl == void_type_node)
1007 if (TREE_CODE (*decl) == TEMPLATE_DECL)
1008 decl = &DECL_TEMPLATE_RESULT (*decl);
1010 decl_attributes (decl, attributes, flags);
1012 if (TREE_CODE (*decl) == TYPE_DECL)
1013 SET_IDENTIFIER_TYPE_VALUE (DECL_NAME (*decl), TREE_TYPE (*decl));
1016 /* Walks through the namespace- or function-scope anonymous union
1017 OBJECT, with the indicated TYPE, building appropriate VAR_DECLs.
1018 Returns one of the fields for use in the mangled name. */
1021 build_anon_union_vars (tree type, tree object)
1023 tree main_decl = NULL_TREE;
1026 /* Rather than write the code to handle the non-union case,
1027 just give an error. */
1028 if (TREE_CODE (type) != UNION_TYPE)
1029 error ("anonymous struct not inside named type");
1031 for (field = TYPE_FIELDS (type);
1033 field = TREE_CHAIN (field))
1038 if (DECL_ARTIFICIAL (field))
1040 if (TREE_CODE (field) != FIELD_DECL)
1042 pedwarn ("%q+#D invalid; an anonymous union can only "
1043 "have non-static data members", field);
1047 if (TREE_PRIVATE (field))
1048 pedwarn ("private member %q+#D in anonymous union", field);
1049 else if (TREE_PROTECTED (field))
1050 pedwarn ("protected member %q+#D in anonymous union", field);
1052 if (processing_template_decl)
1053 ref = build_min_nt (COMPONENT_REF, object,
1054 DECL_NAME (field), NULL_TREE);
1056 ref = build_class_member_access_expr (object, field, NULL_TREE,
1059 if (DECL_NAME (field))
1063 decl = build_decl (VAR_DECL, DECL_NAME (field), TREE_TYPE (field));
1065 base = get_base_address (object);
1066 TREE_PUBLIC (decl) = TREE_PUBLIC (base);
1067 TREE_STATIC (decl) = TREE_STATIC (base);
1068 DECL_EXTERNAL (decl) = DECL_EXTERNAL (base);
1070 SET_DECL_VALUE_EXPR (decl, ref);
1071 DECL_HAS_VALUE_EXPR_P (decl) = 1;
1073 decl = pushdecl (decl);
1075 else if (ANON_AGGR_TYPE_P (TREE_TYPE (field)))
1076 decl = build_anon_union_vars (TREE_TYPE (field), ref);
1080 if (main_decl == NULL_TREE)
1087 /* Finish off the processing of a UNION_TYPE structure. If the union is an
1088 anonymous union, then all members must be laid out together. PUBLIC_P
1089 is nonzero if this union is not declared static. */
1092 finish_anon_union (tree anon_union_decl)
1098 if (anon_union_decl == error_mark_node)
1101 type = TREE_TYPE (anon_union_decl);
1102 public_p = TREE_PUBLIC (anon_union_decl);
1104 /* The VAR_DECL's context is the same as the TYPE's context. */
1105 DECL_CONTEXT (anon_union_decl) = DECL_CONTEXT (TYPE_NAME (type));
1107 if (TYPE_FIELDS (type) == NULL_TREE)
1112 error ("namespace-scope anonymous aggregates must be static");
1116 main_decl = build_anon_union_vars (type, anon_union_decl);
1117 if (main_decl == NULL_TREE)
1119 warning (0, "anonymous union with no members");
1123 if (!processing_template_decl)
1125 /* Use main_decl to set the mangled name. */
1126 DECL_NAME (anon_union_decl) = DECL_NAME (main_decl);
1127 mangle_decl (anon_union_decl);
1128 DECL_NAME (anon_union_decl) = NULL_TREE;
1131 pushdecl (anon_union_decl);
1132 if (building_stmt_tree ()
1133 && at_function_scope_p ())
1134 add_decl_expr (anon_union_decl);
1135 else if (!processing_template_decl)
1136 rest_of_decl_compilation (anon_union_decl,
1137 toplevel_bindings_p (), at_eof);
1140 /* Auxiliary functions to make type signatures for
1141 `operator new' and `operator delete' correspond to
1142 what compiler will be expecting. */
1145 coerce_new_type (tree type)
1148 tree args = TYPE_ARG_TYPES (type);
1150 gcc_assert (TREE_CODE (type) == FUNCTION_TYPE);
1152 if (!same_type_p (TREE_TYPE (type), ptr_type_node))
1155 error ("%<operator new%> must return type %qT", ptr_type_node);
1158 if (!args || args == void_list_node
1159 || !same_type_p (TREE_VALUE (args), size_type_node))
1162 if (args && args != void_list_node)
1163 args = TREE_CHAIN (args);
1164 pedwarn ("%<operator new%> takes type %<size_t%> (%qT) "
1165 "as first parameter", size_type_node);
1170 args = tree_cons (NULL_TREE, size_type_node, args);
1173 type = build_exception_variant
1174 (build_function_type (ptr_type_node, args),
1175 TYPE_RAISES_EXCEPTIONS (type));
1183 coerce_delete_type (tree type)
1186 tree args = TYPE_ARG_TYPES (type);
1188 gcc_assert (TREE_CODE (type) == FUNCTION_TYPE);
1190 if (!same_type_p (TREE_TYPE (type), void_type_node))
1193 error ("%<operator delete%> must return type %qT", void_type_node);
1196 if (!args || args == void_list_node
1197 || !same_type_p (TREE_VALUE (args), ptr_type_node))
1200 if (args && args != void_list_node)
1201 args = TREE_CHAIN (args);
1202 error ("%<operator delete%> takes type %qT as first parameter",
1208 args = tree_cons (NULL_TREE, ptr_type_node, args);
1211 type = build_exception_variant
1212 (build_function_type (void_type_node, args),
1213 TYPE_RAISES_EXCEPTIONS (type));
1222 mark_vtable_entries (tree decl)
1225 unsigned HOST_WIDE_INT idx;
1227 FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (DECL_INITIAL (decl)),
1232 STRIP_NOPS (fnaddr);
1234 if (TREE_CODE (fnaddr) != ADDR_EXPR
1235 && TREE_CODE (fnaddr) != FDESC_EXPR)
1236 /* This entry is an offset: a virtual base class offset, a
1237 virtual call offset, an RTTI offset, etc. */
1240 fn = TREE_OPERAND (fnaddr, 0);
1241 TREE_ADDRESSABLE (fn) = 1;
1242 /* When we don't have vcall offsets, we output thunks whenever
1243 we output the vtables that contain them. With vcall offsets,
1244 we know all the thunks we'll need when we emit a virtual
1245 function, so we emit the thunks there instead. */
1246 if (DECL_THUNK_P (fn))
1247 use_thunk (fn, /*emit_p=*/0);
1252 /* Set DECL up to have the closest approximation of "initialized common"
1253 linkage available. */
1256 comdat_linkage (tree decl)
1259 make_decl_one_only (decl);
1260 else if (TREE_CODE (decl) == FUNCTION_DECL
1261 || (TREE_CODE (decl) == VAR_DECL && DECL_ARTIFICIAL (decl)))
1262 /* We can just emit function and compiler-generated variables
1263 statically; having multiple copies is (for the most part) only
1266 There are two correctness issues, however: the address of a
1267 template instantiation with external linkage should be the
1268 same, independent of what translation unit asks for the
1269 address, and this will not hold when we emit multiple copies of
1270 the function. However, there's little else we can do.
1272 Also, by default, the typeinfo implementation assumes that
1273 there will be only one copy of the string used as the name for
1274 each type. Therefore, if weak symbols are unavailable, the
1275 run-time library should perform a more conservative check; it
1276 should perform a string comparison, rather than an address
1278 TREE_PUBLIC (decl) = 0;
1281 /* Static data member template instantiations, however, cannot
1282 have multiple copies. */
1283 if (DECL_INITIAL (decl) == 0
1284 || DECL_INITIAL (decl) == error_mark_node)
1285 DECL_COMMON (decl) = 1;
1286 else if (EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl)))
1288 DECL_COMMON (decl) = 1;
1289 DECL_INITIAL (decl) = error_mark_node;
1291 else if (!DECL_EXPLICIT_INSTANTIATION (decl))
1293 /* We can't do anything useful; leave vars for explicit
1295 DECL_EXTERNAL (decl) = 1;
1296 DECL_NOT_REALLY_EXTERN (decl) = 0;
1300 if (DECL_LANG_SPECIFIC (decl))
1301 DECL_COMDAT (decl) = 1;
1304 /* For win32 we also want to put explicit instantiations in
1305 linkonce sections, so that they will be merged with implicit
1306 instantiations; otherwise we get duplicate symbol errors.
1307 For Darwin we do not want explicit instantiations to be
1311 maybe_make_one_only (tree decl)
1313 /* We used to say that this was not necessary on targets that support weak
1314 symbols, because the implicit instantiations will defer to the explicit
1315 one. However, that's not actually the case in SVR4; a strong definition
1316 after a weak one is an error. Also, not making explicit
1317 instantiations one_only means that we can end up with two copies of
1318 some template instantiations. */
1322 /* We can't set DECL_COMDAT on functions, or cp_finish_file will think
1323 we can get away with not emitting them if they aren't used. We need
1324 to for variables so that cp_finish_decl will update their linkage,
1325 because their DECL_INITIAL may not have been set properly yet. */
1327 if (!TARGET_WEAK_NOT_IN_ARCHIVE_TOC
1328 || (! DECL_EXPLICIT_INSTANTIATION (decl)
1329 && ! DECL_TEMPLATE_SPECIALIZATION (decl)))
1331 make_decl_one_only (decl);
1333 if (TREE_CODE (decl) == VAR_DECL)
1335 DECL_COMDAT (decl) = 1;
1336 /* Mark it needed so we don't forget to emit it. */
1337 mark_decl_referenced (decl);
1342 /* Determine whether or not we want to specifically import or export CTYPE,
1343 using various heuristics. */
1346 import_export_class (tree ctype)
1348 /* -1 for imported, 1 for exported. */
1349 int import_export = 0;
1351 /* It only makes sense to call this function at EOF. The reason is
1352 that this function looks at whether or not the first non-inline
1353 non-abstract virtual member function has been defined in this
1354 translation unit. But, we can't possibly know that until we've
1355 seen the entire translation unit. */
1356 gcc_assert (at_eof);
1358 if (CLASSTYPE_INTERFACE_KNOWN (ctype))
1361 /* If MULTIPLE_SYMBOL_SPACES is set and we saw a #pragma interface,
1362 we will have CLASSTYPE_INTERFACE_ONLY set but not
1363 CLASSTYPE_INTERFACE_KNOWN. In that case, we don't want to use this
1364 heuristic because someone will supply a #pragma implementation
1365 elsewhere, and deducing it here would produce a conflict. */
1366 if (CLASSTYPE_INTERFACE_ONLY (ctype))
1369 if (lookup_attribute ("dllimport", TYPE_ATTRIBUTES (ctype)))
1371 else if (lookup_attribute ("dllexport", TYPE_ATTRIBUTES (ctype)))
1373 else if (CLASSTYPE_IMPLICIT_INSTANTIATION (ctype)
1374 && !flag_implicit_templates)
1375 /* For a template class, without -fimplicit-templates, check the
1376 repository. If the virtual table is assigned to this
1377 translation unit, then export the class; otherwise, import
1379 import_export = repo_export_class_p (ctype) ? 1 : -1;
1380 else if (TYPE_POLYMORPHIC_P (ctype))
1382 /* The ABI specifies that the virtual table and associated
1383 information are emitted with the key method, if any. */
1384 tree method = CLASSTYPE_KEY_METHOD (ctype);
1385 /* If weak symbol support is not available, then we must be
1386 careful not to emit the vtable when the key function is
1387 inline. An inline function can be defined in multiple
1388 translation units. If we were to emit the vtable in each
1389 translation unit containing a definition, we would get
1390 multiple definition errors at link-time. */
1391 if (method && (flag_weak || ! DECL_DECLARED_INLINE_P (method)))
1392 import_export = (DECL_REALLY_EXTERN (method) ? -1 : 1);
1395 /* When MULTIPLE_SYMBOL_SPACES is set, we cannot count on seeing
1396 a definition anywhere else. */
1397 if (MULTIPLE_SYMBOL_SPACES && import_export == -1)
1400 /* Allow backends the chance to overrule the decision. */
1401 if (targetm.cxx.import_export_class)
1402 import_export = targetm.cxx.import_export_class (ctype, import_export);
1406 SET_CLASSTYPE_INTERFACE_KNOWN (ctype);
1407 CLASSTYPE_INTERFACE_ONLY (ctype) = (import_export < 0);
1411 /* Return true if VAR has already been provided to the back end; in that
1412 case VAR should not be modified further by the front end. */
1414 var_finalized_p (tree var)
1416 return cgraph_varpool_node (var)->finalized;
1419 /* DECL is a VAR_DECL or FUNCTION_DECL which, for whatever reason,
1420 must be emitted in this translation unit. Mark it as such. */
1423 mark_needed (tree decl)
1425 /* It's possible that we no longer need to set
1426 TREE_SYMBOL_REFERENCED here directly, but doing so is
1428 TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl)) = 1;
1429 mark_decl_referenced (decl);
1432 /* DECL is either a FUNCTION_DECL or a VAR_DECL. This function
1433 returns true if a definition of this entity should be provided in
1434 this object file. Callers use this function to determine whether
1435 or not to let the back end know that a definition of DECL is
1436 available in this translation unit. */
1439 decl_needed_p (tree decl)
1441 gcc_assert (TREE_CODE (decl) == VAR_DECL
1442 || TREE_CODE (decl) == FUNCTION_DECL);
1443 /* This function should only be called at the end of the translation
1444 unit. We cannot be sure of whether or not something will be
1445 COMDAT until that point. */
1446 gcc_assert (at_eof);
1448 /* All entities with external linkage that are not COMDAT should be
1449 emitted; they may be referred to from other object files. */
1450 if (TREE_PUBLIC (decl) && !DECL_COMDAT (decl))
1452 /* If this entity was used, let the back-end see it; it will decide
1453 whether or not to emit it into the object file. */
1454 if (TREE_USED (decl)
1455 || (DECL_ASSEMBLER_NAME_SET_P (decl)
1456 && TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl))))
1458 /* Otherwise, DECL does not need to be emitted -- yet. A subsequent
1459 reference to DECL might cause it to be emitted later. */
1463 /* If necessary, write out the vtables for the dynamic class CTYPE.
1464 Returns true if any vtables were emitted. */
1467 maybe_emit_vtables (tree ctype)
1473 /* If the vtables for this class have already been emitted there is
1474 nothing more to do. */
1475 primary_vtbl = CLASSTYPE_VTABLES (ctype);
1476 if (var_finalized_p (primary_vtbl))
1478 /* Ignore dummy vtables made by get_vtable_decl. */
1479 if (TREE_TYPE (primary_vtbl) == void_type_node)
1482 /* On some targets, we cannot determine the key method until the end
1483 of the translation unit -- which is when this function is
1485 if (!targetm.cxx.key_method_may_be_inline ())
1486 determine_key_method (ctype);
1488 /* See if any of the vtables are needed. */
1489 for (vtbl = CLASSTYPE_VTABLES (ctype); vtbl; vtbl = TREE_CHAIN (vtbl))
1491 import_export_decl (vtbl);
1492 if (DECL_NOT_REALLY_EXTERN (vtbl) && decl_needed_p (vtbl))
1497 /* If the references to this class' vtables are optimized away,
1498 still emit the appropriate debugging information. See
1500 if (DECL_COMDAT (primary_vtbl)
1501 && CLASSTYPE_DEBUG_REQUESTED (ctype))
1502 note_debug_info_needed (ctype);
1506 /* The ABI requires that we emit all of the vtables if we emit any
1508 for (vtbl = CLASSTYPE_VTABLES (ctype); vtbl; vtbl = TREE_CHAIN (vtbl))
1510 /* Mark entities references from the virtual table as used. */
1511 mark_vtable_entries (vtbl);
1513 if (TREE_TYPE (DECL_INITIAL (vtbl)) == 0)
1515 tree expr = store_init_value (vtbl, DECL_INITIAL (vtbl));
1517 /* It had better be all done at compile-time. */
1522 DECL_EXTERNAL (vtbl) = 0;
1523 rest_of_decl_compilation (vtbl, 1, 1);
1525 /* Because we're only doing syntax-checking, we'll never end up
1526 actually marking the variable as written. */
1527 if (flag_syntax_only)
1528 TREE_ASM_WRITTEN (vtbl) = 1;
1531 /* Since we're writing out the vtable here, also write the debug
1533 note_debug_info_needed (ctype);
1538 /* Like c_determine_visibility, but with additional C++-specific
1541 Function-scope entities can rely on the function's visibility because
1542 it is set in start_preparsed_function.
1544 Class-scope entities cannot rely on the class's visibility until the end
1545 of the enclosing class definition.
1547 Note that because namespaces have multiple independent definitions,
1548 namespace visibility is handled elsewhere using the #pragma visibility
1549 machinery rather than by decorating the namespace declaration. */
1552 determine_visibility (tree decl)
1556 /* Only relevant for names with external linkage. */
1557 if (!TREE_PUBLIC (decl))
1560 /* Cloned constructors and destructors get the same visibility as
1561 the underlying function. That should be set up in
1562 maybe_clone_body. */
1563 gcc_assert (!DECL_CLONED_FUNCTION_P (decl));
1565 /* Give the common code a chance to make a determination. */
1566 if (c_determine_visibility (decl))
1569 /* If DECL is a member of a class, visibility specifiers on the
1570 class can influence the visibility of the DECL. */
1571 if (DECL_CLASS_SCOPE_P (decl))
1572 class_type = DECL_CONTEXT (decl);
1573 else if (TREE_CODE (decl) == VAR_DECL
1574 && DECL_TINFO_P (decl)
1575 && CLASS_TYPE_P (TREE_TYPE (DECL_NAME (decl))))
1576 class_type = TREE_TYPE (DECL_NAME (decl));
1579 /* Virtual tables have DECL_CONTEXT set to their associated class,
1580 so they are automatically handled above. */
1581 gcc_assert (TREE_CODE (decl) != VAR_DECL
1582 || !DECL_VTABLE_OR_VTT_P (decl));
1584 if (DECL_FUNCTION_SCOPE_P (decl))
1586 tree fn = DECL_CONTEXT (decl);
1587 DECL_VISIBILITY (decl) = DECL_VISIBILITY (fn);
1588 DECL_VISIBILITY_SPECIFIED (decl) = DECL_VISIBILITY_SPECIFIED (fn);
1591 /* Entities not associated with any class just get the
1592 visibility specified by their attributes. */
1596 /* By default, static data members and function members receive
1597 the visibility of their containing class. */
1600 determine_visibility_from_class (decl, class_type);
1602 /* Give the target a chance to override the visibility associated
1604 if (TREE_CODE (decl) == VAR_DECL
1605 && (DECL_TINFO_P (decl)
1606 || (DECL_VTABLE_OR_VTT_P (decl)
1607 /* Construction virtual tables are not exported because
1608 they cannot be referred to from other object files;
1609 their name is not standardized by the ABI. */
1610 && !DECL_CONSTRUCTION_VTABLE_P (decl)))
1611 && TREE_PUBLIC (decl)
1612 && !DECL_REALLY_EXTERN (decl)
1613 && DECL_VISIBILITY_SPECIFIED (decl)
1614 && (!class_type || !CLASSTYPE_VISIBILITY_SPECIFIED (class_type)))
1615 targetm.cxx.determine_class_data_visibility (decl);
1620 determine_visibility_from_class (tree decl, tree class_type)
1622 if (TARGET_DLLIMPORT_DECL_ATTRIBUTES
1623 && lookup_attribute ("dllexport", TYPE_ATTRIBUTES (class_type)))
1625 DECL_VISIBILITY (decl) = VISIBILITY_DEFAULT;
1626 DECL_VISIBILITY_SPECIFIED (decl) = 1;
1628 else if (TREE_CODE (decl) == FUNCTION_DECL
1629 && DECL_DECLARED_INLINE_P (decl)
1630 && visibility_options.inlines_hidden)
1632 /* Don't change it if it has been set explicitly by user. */
1633 if (!DECL_VISIBILITY_SPECIFIED (decl))
1635 DECL_VISIBILITY (decl) = VISIBILITY_HIDDEN;
1636 DECL_VISIBILITY_SPECIFIED (decl) = 1;
1639 else if (CLASSTYPE_VISIBILITY_SPECIFIED (class_type))
1641 DECL_VISIBILITY (decl) = CLASSTYPE_VISIBILITY (class_type);
1642 DECL_VISIBILITY_SPECIFIED (decl) = 1;
1644 else if (TYPE_CLASS_SCOPE_P (class_type))
1645 determine_visibility_from_class (decl, TYPE_CONTEXT (class_type));
1646 else if (TYPE_FUNCTION_SCOPE_P (class_type))
1648 tree fn = TYPE_CONTEXT (class_type);
1649 DECL_VISIBILITY (decl) = DECL_VISIBILITY (fn);
1650 DECL_VISIBILITY_SPECIFIED (decl) = DECL_VISIBILITY_SPECIFIED (fn);
1652 else if (!DECL_VISIBILITY_SPECIFIED (decl))
1654 DECL_VISIBILITY (decl) = CLASSTYPE_VISIBILITY (class_type);
1655 DECL_VISIBILITY_SPECIFIED (decl) = 0;
1659 /* DECL is a FUNCTION_DECL or VAR_DECL. If the object file linkage
1660 for DECL has not already been determined, do so now by setting
1661 DECL_EXTERNAL, DECL_COMDAT and other related flags. Until this
1662 function is called entities with vague linkage whose definitions
1663 are available must have TREE_PUBLIC set.
1665 If this function decides to place DECL in COMDAT, it will set
1666 appropriate flags -- but will not clear DECL_EXTERNAL. It is up to
1667 the caller to decide whether or not to clear DECL_EXTERNAL. Some
1668 callers defer that decision until it is clear that DECL is actually
1672 import_export_decl (tree decl)
1677 tree class_type = NULL_TREE;
1679 if (DECL_INTERFACE_KNOWN (decl))
1682 /* We cannot determine what linkage to give to an entity with vague
1683 linkage until the end of the file. For example, a virtual table
1684 for a class will be defined if and only if the key method is
1685 defined in this translation unit. As a further example, consider
1686 that when compiling a translation unit that uses PCH file with
1687 "-frepo" it would be incorrect to make decisions about what
1688 entities to emit when building the PCH; those decisions must be
1689 delayed until the repository information has been processed. */
1690 gcc_assert (at_eof);
1691 /* Object file linkage for explicit instantiations is handled in
1692 mark_decl_instantiated. For static variables in functions with
1693 vague linkage, maybe_commonize_var is used.
1695 Therefore, the only declarations that should be provided to this
1696 function are those with external linkage that are:
1698 * implicit instantiations of function templates
1702 * implicit instantiations of static data members of class
1709 Furthermore, all entities that reach this point must have a
1710 definition available in this translation unit.
1712 The following assertions check these conditions. */
1713 gcc_assert (TREE_CODE (decl) == FUNCTION_DECL
1714 || TREE_CODE (decl) == VAR_DECL);
1715 /* Any code that creates entities with TREE_PUBLIC cleared should
1716 also set DECL_INTERFACE_KNOWN. */
1717 gcc_assert (TREE_PUBLIC (decl));
1718 if (TREE_CODE (decl) == FUNCTION_DECL)
1719 gcc_assert (DECL_IMPLICIT_INSTANTIATION (decl)
1720 || DECL_FRIEND_PSEUDO_TEMPLATE_INSTANTIATION (decl)
1721 || DECL_DECLARED_INLINE_P (decl));
1723 gcc_assert (DECL_IMPLICIT_INSTANTIATION (decl)
1724 || DECL_VTABLE_OR_VTT_P (decl)
1725 || DECL_TINFO_P (decl));
1726 /* Check that a definition of DECL is available in this translation
1728 gcc_assert (!DECL_REALLY_EXTERN (decl));
1730 /* Assume that DECL will not have COMDAT linkage. */
1732 /* Assume that DECL will not be imported into this translation
1736 /* See if the repository tells us whether or not to emit DECL in
1737 this translation unit. */
1738 emit_p = repo_emit_p (decl);
1741 else if (emit_p == 1)
1743 /* The repository indicates that this entity should be defined
1744 here. Make sure the back end honors that request. */
1745 if (TREE_CODE (decl) == VAR_DECL)
1747 else if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl)
1748 || DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P (decl))
1751 FOR_EACH_CLONE (clone, decl)
1752 mark_needed (clone);
1756 /* Output the definition as an ordinary strong definition. */
1757 DECL_EXTERNAL (decl) = 0;
1758 DECL_INTERFACE_KNOWN (decl) = 1;
1763 /* We have already decided what to do with this DECL; there is no
1764 need to check anything further. */
1766 else if (TREE_CODE (decl) == VAR_DECL && DECL_VTABLE_OR_VTT_P (decl))
1768 class_type = DECL_CONTEXT (decl);
1769 import_export_class (class_type);
1770 if (TYPE_FOR_JAVA (class_type))
1772 else if (CLASSTYPE_INTERFACE_KNOWN (class_type)
1773 && CLASSTYPE_INTERFACE_ONLY (class_type))
1775 else if ((!flag_weak || TARGET_WEAK_NOT_IN_ARCHIVE_TOC)
1776 && !CLASSTYPE_USE_TEMPLATE (class_type)
1777 && CLASSTYPE_KEY_METHOD (class_type)
1778 && !DECL_DECLARED_INLINE_P (CLASSTYPE_KEY_METHOD (class_type)))
1779 /* The ABI requires that all virtual tables be emitted with
1780 COMDAT linkage. However, on systems where COMDAT symbols
1781 don't show up in the table of contents for a static
1782 archive, or on systems without weak symbols (where we
1783 approximate COMDAT linkage by using internal linkage), the
1784 linker will report errors about undefined symbols because
1785 it will not see the virtual table definition. Therefore,
1786 in the case that we know that the virtual table will be
1787 emitted in only one translation unit, we make the virtual
1788 table an ordinary definition with external linkage. */
1789 DECL_EXTERNAL (decl) = 0;
1790 else if (CLASSTYPE_INTERFACE_KNOWN (class_type))
1792 /* CLASS_TYPE is being exported from this translation unit,
1793 so DECL should be defined here. */
1794 if (!flag_weak && CLASSTYPE_EXPLICIT_INSTANTIATION (class_type))
1795 /* If a class is declared in a header with the "extern
1796 template" extension, then it will not be instantiated,
1797 even in translation units that would normally require
1798 it. Often such classes are explicitly instantiated in
1799 one translation unit. Therefore, the explicit
1800 instantiation must be made visible to other translation
1802 DECL_EXTERNAL (decl) = 0;
1805 /* The generic C++ ABI says that class data is always
1806 COMDAT, even if there is a key function. Some
1807 variants (e.g., the ARM EABI) says that class data
1808 only has COMDAT linkage if the class data might be
1809 emitted in more than one translation unit. When the
1810 key method can be inline and is inline, we still have
1811 to arrange for comdat even though
1812 class_data_always_comdat is false. */
1813 if (!CLASSTYPE_KEY_METHOD (class_type)
1814 || DECL_DECLARED_INLINE_P (CLASSTYPE_KEY_METHOD (class_type))
1815 || targetm.cxx.class_data_always_comdat ())
1817 /* The ABI requires COMDAT linkage. Normally, we
1818 only emit COMDAT things when they are needed;
1819 make sure that we realize that this entity is
1826 else if (!flag_implicit_templates
1827 && CLASSTYPE_IMPLICIT_INSTANTIATION (class_type))
1832 else if (TREE_CODE (decl) == VAR_DECL && DECL_TINFO_P (decl))
1834 tree type = TREE_TYPE (DECL_NAME (decl));
1835 if (CLASS_TYPE_P (type))
1838 import_export_class (type);
1839 if (CLASSTYPE_INTERFACE_KNOWN (type)
1840 && TYPE_POLYMORPHIC_P (type)
1841 && CLASSTYPE_INTERFACE_ONLY (type)
1842 /* If -fno-rtti was specified, then we cannot be sure
1843 that RTTI information will be emitted with the
1844 virtual table of the class, so we must emit it
1845 wherever it is used. */
1850 if (CLASSTYPE_INTERFACE_KNOWN (type)
1851 && !CLASSTYPE_INTERFACE_ONLY (type))
1853 comdat_p = (targetm.cxx.class_data_always_comdat ()
1854 || (CLASSTYPE_KEY_METHOD (type)
1855 && DECL_DECLARED_INLINE_P (CLASSTYPE_KEY_METHOD (type))));
1860 DECL_EXTERNAL (decl) = 0;
1870 else if (DECL_TEMPLATE_INSTANTIATION (decl)
1871 || DECL_FRIEND_PSEUDO_TEMPLATE_INSTANTIATION (decl))
1873 /* DECL is an implicit instantiation of a function or static
1875 if (flag_implicit_templates
1876 || (flag_implicit_inline_templates
1877 && TREE_CODE (decl) == FUNCTION_DECL
1878 && DECL_DECLARED_INLINE_P (decl)))
1881 /* If we are not implicitly generating templates, then mark
1882 this entity as undefined in this translation unit. */
1885 else if (DECL_FUNCTION_MEMBER_P (decl))
1887 if (!DECL_DECLARED_INLINE_P (decl))
1889 tree ctype = DECL_CONTEXT (decl);
1890 import_export_class (ctype);
1891 if (CLASSTYPE_INTERFACE_KNOWN (ctype))
1893 DECL_NOT_REALLY_EXTERN (decl)
1894 = ! (CLASSTYPE_INTERFACE_ONLY (ctype)
1895 || (DECL_DECLARED_INLINE_P (decl)
1896 && ! flag_implement_inlines
1897 && !DECL_VINDEX (decl)));
1899 if (!DECL_NOT_REALLY_EXTERN (decl))
1900 DECL_EXTERNAL (decl) = 1;
1902 /* Always make artificials weak. */
1903 if (DECL_ARTIFICIAL (decl) && flag_weak)
1906 maybe_make_one_only (decl);
1917 /* If we are importing DECL into this translation unit, mark is
1918 an undefined here. */
1919 DECL_EXTERNAL (decl) = 1;
1920 DECL_NOT_REALLY_EXTERN (decl) = 0;
1924 /* If we decided to put DECL in COMDAT, mark it accordingly at
1926 comdat_linkage (decl);
1929 DECL_INTERFACE_KNOWN (decl) = 1;
1932 /* Return an expression that performs the destruction of DECL, which
1933 must be a VAR_DECL whose type has a non-trivial destructor, or is
1934 an array whose (innermost) elements have a non-trivial destructor. */
1937 build_cleanup (tree decl)
1940 tree type = TREE_TYPE (decl);
1942 /* This function should only be called for declarations that really
1943 require cleanups. */
1944 gcc_assert (!TYPE_HAS_TRIVIAL_DESTRUCTOR (type));
1946 /* Treat all objects with destructors as used; the destructor may do
1947 something substantive. */
1950 if (TREE_CODE (type) == ARRAY_TYPE)
1954 cxx_mark_addressable (decl);
1955 temp = build1 (ADDR_EXPR, build_pointer_type (type), decl);
1957 temp = build_delete (TREE_TYPE (temp), temp,
1958 sfk_complete_destructor,
1959 LOOKUP_NORMAL|LOOKUP_NONVIRTUAL|LOOKUP_DESTRUCTOR, 0);
1963 /* Returns the initialization guard variable for the variable DECL,
1964 which has static storage duration. */
1967 get_guard (tree decl)
1972 sname = mangle_guard_variable (decl);
1973 guard = IDENTIFIER_GLOBAL_VALUE (sname);
1978 /* We use a type that is big enough to contain a mutex as well
1979 as an integer counter. */
1980 guard_type = targetm.cxx.guard_type ();
1981 guard = build_decl (VAR_DECL, sname, guard_type);
1983 /* The guard should have the same linkage as what it guards. */
1984 TREE_PUBLIC (guard) = TREE_PUBLIC (decl);
1985 TREE_STATIC (guard) = TREE_STATIC (decl);
1986 DECL_COMMON (guard) = DECL_COMMON (decl);
1987 DECL_ONE_ONLY (guard) = DECL_ONE_ONLY (decl);
1988 if (TREE_PUBLIC (decl))
1989 DECL_WEAK (guard) = DECL_WEAK (decl);
1991 DECL_ARTIFICIAL (guard) = 1;
1992 DECL_IGNORED_P (guard) = 1;
1993 TREE_USED (guard) = 1;
1994 pushdecl_top_level_and_finish (guard, NULL_TREE);
1999 /* Return those bits of the GUARD variable that should be set when the
2000 guarded entity is actually initialized. */
2003 get_guard_bits (tree guard)
2005 if (!targetm.cxx.guard_mask_bit ())
2007 /* We only set the first byte of the guard, in order to leave room
2008 for a mutex in the high-order bits. */
2009 guard = build1 (ADDR_EXPR,
2010 build_pointer_type (TREE_TYPE (guard)),
2012 guard = build1 (NOP_EXPR,
2013 build_pointer_type (char_type_node),
2015 guard = build1 (INDIRECT_REF, char_type_node, guard);
2021 /* Return an expression which determines whether or not the GUARD
2022 variable has already been initialized. */
2025 get_guard_cond (tree guard)
2029 /* Check to see if the GUARD is zero. */
2030 guard = get_guard_bits (guard);
2032 /* Mask off all but the low bit. */
2033 if (targetm.cxx.guard_mask_bit ())
2035 guard_value = integer_one_node;
2036 if (!same_type_p (TREE_TYPE (guard_value), TREE_TYPE (guard)))
2037 guard_value = convert (TREE_TYPE (guard), guard_value);
2038 guard = cp_build_binary_op (BIT_AND_EXPR, guard, guard_value);
2041 guard_value = integer_zero_node;
2042 if (!same_type_p (TREE_TYPE (guard_value), TREE_TYPE (guard)))
2043 guard_value = convert (TREE_TYPE (guard), guard_value);
2044 return cp_build_binary_op (EQ_EXPR, guard, guard_value);
2047 /* Return an expression which sets the GUARD variable, indicating that
2048 the variable being guarded has been initialized. */
2051 set_guard (tree guard)
2055 /* Set the GUARD to one. */
2056 guard = get_guard_bits (guard);
2057 guard_init = integer_one_node;
2058 if (!same_type_p (TREE_TYPE (guard_init), TREE_TYPE (guard)))
2059 guard_init = convert (TREE_TYPE (guard), guard_init);
2060 return build_modify_expr (guard, NOP_EXPR, guard_init);
2063 /* Start the process of running a particular set of global constructors
2064 or destructors. Subroutine of do_[cd]tors. */
2067 start_objects (int method_type, int initp)
2073 /* Make ctor or dtor function. METHOD_TYPE may be 'I' or 'D'. */
2075 if (initp != DEFAULT_INIT_PRIORITY)
2085 sprintf (type, "%c%c%.5u", method_type, joiner, initp);
2088 sprintf (type, "%c", method_type);
2090 fndecl = build_lang_decl (FUNCTION_DECL,
2091 get_file_function_name_long (type),
2092 build_function_type (void_type_node,
2094 start_preparsed_function (fndecl, /*attrs=*/NULL_TREE, SF_PRE_PARSED);
2096 /* It can be a static function as long as collect2 does not have
2097 to scan the object file to find its ctor/dtor routine. */
2098 TREE_PUBLIC (current_function_decl) = ! targetm.have_ctors_dtors;
2100 /* Mark this declaration as used to avoid spurious warnings. */
2101 TREE_USED (current_function_decl) = 1;
2103 /* Mark this function as a global constructor or destructor. */
2104 if (method_type == 'I')
2105 DECL_GLOBAL_CTOR_P (current_function_decl) = 1;
2107 DECL_GLOBAL_DTOR_P (current_function_decl) = 1;
2108 DECL_LANG_SPECIFIC (current_function_decl)->decl_flags.u2sel = 1;
2110 body = begin_compound_stmt (BCS_FN_BODY);
2112 /* We cannot allow these functions to be elided, even if they do not
2113 have external linkage. And, there's no point in deferring
2114 compilation of thes functions; they're all going to have to be
2116 DECL_INLINE (current_function_decl) = 0;
2117 DECL_UNINLINABLE (current_function_decl) = 1;
2122 /* Finish the process of running a particular set of global constructors
2123 or destructors. Subroutine of do_[cd]tors. */
2126 finish_objects (int method_type, int initp, tree body)
2131 finish_compound_stmt (body);
2132 fn = finish_function (0);
2133 expand_or_defer_fn (fn);
2135 /* When only doing semantic analysis, and no RTL generation, we
2136 can't call functions that directly emit assembly code; there is
2137 no assembly file in which to put the code. */
2138 if (flag_syntax_only)
2141 if (targetm.have_ctors_dtors)
2143 rtx fnsym = XEXP (DECL_RTL (fn), 0);
2144 cgraph_mark_needed_node (cgraph_node (fn));
2145 if (method_type == 'I')
2146 (* targetm.asm_out.constructor) (fnsym, initp);
2148 (* targetm.asm_out.destructor) (fnsym, initp);
2152 /* The names of the parameters to the function created to handle
2153 initializations and destructions for objects with static storage
2155 #define INITIALIZE_P_IDENTIFIER "__initialize_p"
2156 #define PRIORITY_IDENTIFIER "__priority"
2158 /* The name of the function we create to handle initializations and
2159 destructions for objects with static storage duration. */
2160 #define SSDF_IDENTIFIER "__static_initialization_and_destruction"
2162 /* The declaration for the __INITIALIZE_P argument. */
2163 static GTY(()) tree initialize_p_decl;
2165 /* The declaration for the __PRIORITY argument. */
2166 static GTY(()) tree priority_decl;
2168 /* The declaration for the static storage duration function. */
2169 static GTY(()) tree ssdf_decl;
2171 /* All the static storage duration functions created in this
2172 translation unit. */
2173 static GTY(()) VEC(tree,gc) *ssdf_decls;
2175 /* A map from priority levels to information about that priority
2176 level. There may be many such levels, so efficient lookup is
2178 static splay_tree priority_info_map;
2180 /* Begins the generation of the function that will handle all
2181 initialization and destruction of objects with static storage
2182 duration. The function generated takes two parameters of type
2183 `int': __INITIALIZE_P and __PRIORITY. If __INITIALIZE_P is
2184 nonzero, it performs initializations. Otherwise, it performs
2185 destructions. It only performs those initializations or
2186 destructions with the indicated __PRIORITY. The generated function
2189 It is assumed that this function will only be called once per
2190 translation unit. */
2193 start_static_storage_duration_function (unsigned count)
2198 char id[sizeof (SSDF_IDENTIFIER) + 1 /* '\0' */ + 32];
2200 /* Create the identifier for this function. It will be of the form
2201 SSDF_IDENTIFIER_<number>. */
2202 sprintf (id, "%s_%u", SSDF_IDENTIFIER, count);
2204 /* Create the parameters. */
2205 parm_types = void_list_node;
2206 parm_types = tree_cons (NULL_TREE, integer_type_node, parm_types);
2207 parm_types = tree_cons (NULL_TREE, integer_type_node, parm_types);
2208 type = build_function_type (void_type_node, parm_types);
2210 /* Create the FUNCTION_DECL itself. */
2211 ssdf_decl = build_lang_decl (FUNCTION_DECL,
2212 get_identifier (id),
2214 TREE_PUBLIC (ssdf_decl) = 0;
2215 DECL_ARTIFICIAL (ssdf_decl) = 1;
2217 /* Put this function in the list of functions to be called from the
2218 static constructors and destructors. */
2221 ssdf_decls = VEC_alloc (tree, gc, 32);
2223 /* Take this opportunity to initialize the map from priority
2224 numbers to information about that priority level. */
2225 priority_info_map = splay_tree_new (splay_tree_compare_ints,
2226 /*delete_key_fn=*/0,
2227 /*delete_value_fn=*/
2228 (splay_tree_delete_value_fn) &free);
2230 /* We always need to generate functions for the
2231 DEFAULT_INIT_PRIORITY so enter it now. That way when we walk
2232 priorities later, we'll be sure to find the
2233 DEFAULT_INIT_PRIORITY. */
2234 get_priority_info (DEFAULT_INIT_PRIORITY);
2237 VEC_safe_push (tree, gc, ssdf_decls, ssdf_decl);
2239 /* Create the argument list. */
2240 initialize_p_decl = cp_build_parm_decl
2241 (get_identifier (INITIALIZE_P_IDENTIFIER), integer_type_node);
2242 DECL_CONTEXT (initialize_p_decl) = ssdf_decl;
2243 TREE_USED (initialize_p_decl) = 1;
2244 priority_decl = cp_build_parm_decl
2245 (get_identifier (PRIORITY_IDENTIFIER), integer_type_node);
2246 DECL_CONTEXT (priority_decl) = ssdf_decl;
2247 TREE_USED (priority_decl) = 1;
2249 TREE_CHAIN (initialize_p_decl) = priority_decl;
2250 DECL_ARGUMENTS (ssdf_decl) = initialize_p_decl;
2252 /* Put the function in the global scope. */
2253 pushdecl (ssdf_decl);
2255 /* Start the function itself. This is equivalent to declaring the
2258 static void __ssdf (int __initialize_p, init __priority_p);
2260 It is static because we only need to call this function from the
2261 various constructor and destructor functions for this module. */
2262 start_preparsed_function (ssdf_decl,
2263 /*attrs=*/NULL_TREE,
2266 /* Set up the scope of the outermost block in the function. */
2267 body = begin_compound_stmt (BCS_FN_BODY);
2269 /* This function must not be deferred because we are depending on
2270 its compilation to tell us what is TREE_SYMBOL_REFERENCED. */
2271 DECL_INLINE (ssdf_decl) = 0;
2272 DECL_UNINLINABLE (ssdf_decl) = 1;
2277 /* Finish the generation of the function which performs initialization
2278 and destruction of objects with static storage duration. After
2279 this point, no more such objects can be created. */
2282 finish_static_storage_duration_function (tree body)
2284 /* Close out the function. */
2285 finish_compound_stmt (body);
2286 expand_or_defer_fn (finish_function (0));
2289 /* Return the information about the indicated PRIORITY level. If no
2290 code to handle this level has yet been generated, generate the
2291 appropriate prologue. */
2293 static priority_info
2294 get_priority_info (int priority)
2299 n = splay_tree_lookup (priority_info_map,
2300 (splay_tree_key) priority);
2303 /* Create a new priority information structure, and insert it
2305 pi = XNEW (struct priority_info_s);
2306 pi->initializations_p = 0;
2307 pi->destructions_p = 0;
2308 splay_tree_insert (priority_info_map,
2309 (splay_tree_key) priority,
2310 (splay_tree_value) pi);
2313 pi = (priority_info) n->value;
2318 /* The effective initialization priority of a DECL. */
2320 #define DECL_EFFECTIVE_INIT_PRIORITY(decl) \
2321 ((!DECL_HAS_INIT_PRIORITY_P (decl) || DECL_INIT_PRIORITY (decl) == 0) \
2322 ? DEFAULT_INIT_PRIORITY : DECL_INIT_PRIORITY (decl))
2324 /* Whether a DECL needs a guard to protect it against multiple
2327 #define NEEDS_GUARD_P(decl) (TREE_PUBLIC (decl) && (DECL_COMMON (decl) \
2328 || DECL_ONE_ONLY (decl) \
2329 || DECL_WEAK (decl)))
2331 /* Set up to handle the initialization or destruction of DECL. If
2332 INITP is nonzero, we are initializing the variable. Otherwise, we
2333 are destroying it. */
2336 one_static_initialization_or_destruction (tree decl, tree init, bool initp)
2338 tree guard_if_stmt = NULL_TREE;
2341 /* If we are supposed to destruct and there's a trivial destructor,
2342 nothing has to be done. */
2344 && TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
2347 /* Trick the compiler into thinking we are at the file and line
2348 where DECL was declared so that error-messages make sense, and so
2349 that the debugger will show somewhat sensible file and line
2351 input_location = DECL_SOURCE_LOCATION (decl);
2357 Access control for implicit calls to the constructors,
2358 the conversion functions, or the destructor called to
2359 create and destroy a static data member is performed as
2360 if these calls appeared in the scope of the member's
2363 we pretend we are in a static member function of the class of
2364 which the DECL is a member. */
2365 if (member_p (decl))
2367 DECL_CONTEXT (current_function_decl) = DECL_CONTEXT (decl);
2368 DECL_STATIC_FUNCTION_P (current_function_decl) = 1;
2371 /* Assume we don't need a guard. */
2373 /* We need a guard if this is an object with external linkage that
2374 might be initialized in more than one place. (For example, a
2375 static data member of a template, when the data member requires
2377 if (NEEDS_GUARD_P (decl))
2381 guard = get_guard (decl);
2383 /* When using __cxa_atexit, we just check the GUARD as we would
2384 for a local static. */
2385 if (flag_use_cxa_atexit)
2387 /* When using __cxa_atexit, we never try to destroy
2388 anything from a static destructor. */
2390 guard_cond = get_guard_cond (guard);
2392 /* If we don't have __cxa_atexit, then we will be running
2393 destructors from .fini sections, or their equivalents. So,
2394 we need to know how many times we've tried to initialize this
2395 object. We do initializations only if the GUARD is zero,
2396 i.e., if we are the first to initialize the variable. We do
2397 destructions only if the GUARD is one, i.e., if we are the
2398 last to destroy the variable. */
2401 = cp_build_binary_op (EQ_EXPR,
2402 build_unary_op (PREINCREMENT_EXPR,
2408 = cp_build_binary_op (EQ_EXPR,
2409 build_unary_op (PREDECREMENT_EXPR,
2414 guard_if_stmt = begin_if_stmt ();
2415 finish_if_stmt_cond (guard_cond, guard_if_stmt);
2419 /* If we're using __cxa_atexit, we have not already set the GUARD,
2420 so we must do so now. */
2421 if (guard && initp && flag_use_cxa_atexit)
2422 finish_expr_stmt (set_guard (guard));
2424 /* Perform the initialization or destruction. */
2428 finish_expr_stmt (init);
2430 /* If we're using __cxa_atexit, register a function that calls the
2431 destructor for the object. */
2432 if (flag_use_cxa_atexit)
2433 finish_expr_stmt (register_dtor_fn (decl));
2436 finish_expr_stmt (build_cleanup (decl));
2438 /* Finish the guard if-stmt, if necessary. */
2441 finish_then_clause (guard_if_stmt);
2442 finish_if_stmt (guard_if_stmt);
2445 /* Now that we're done with DECL we don't need to pretend to be a
2446 member of its class any longer. */
2447 DECL_CONTEXT (current_function_decl) = NULL_TREE;
2448 DECL_STATIC_FUNCTION_P (current_function_decl) = 0;
2451 /* Generate code to do the initialization or destruction of the decls in VARS,
2452 a TREE_LIST of VAR_DECL with static storage duration.
2453 Whether initialization or destruction is performed is specified by INITP. */
2456 do_static_initialization_or_destruction (tree vars, bool initp)
2458 tree node, init_if_stmt, cond;
2460 /* Build the outer if-stmt to check for initialization or destruction. */
2461 init_if_stmt = begin_if_stmt ();
2462 cond = initp ? integer_one_node : integer_zero_node;
2463 cond = cp_build_binary_op (EQ_EXPR,
2466 finish_if_stmt_cond (cond, init_if_stmt);
2470 tree decl = TREE_VALUE (node);
2471 tree priority_if_stmt;
2475 /* If we don't need a destructor, there's nothing to do. Avoid
2476 creating a possibly empty if-stmt. */
2477 if (!initp && TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
2479 node = TREE_CHAIN (node);
2483 /* Remember that we had an initialization or finalization at this
2485 priority = DECL_EFFECTIVE_INIT_PRIORITY (decl);
2486 pi = get_priority_info (priority);
2488 pi->initializations_p = 1;
2490 pi->destructions_p = 1;
2492 /* Conditionalize this initialization on being in the right priority
2493 and being initializing/finalizing appropriately. */
2494 priority_if_stmt = begin_if_stmt ();
2495 cond = cp_build_binary_op (EQ_EXPR,
2497 build_int_cst (NULL_TREE, priority));
2498 finish_if_stmt_cond (cond, priority_if_stmt);
2500 /* Process initializers with same priority. */
2502 && DECL_EFFECTIVE_INIT_PRIORITY (TREE_VALUE (node)) == priority;
2503 node = TREE_CHAIN (node))
2504 /* Do one initialization or destruction. */
2505 one_static_initialization_or_destruction (TREE_VALUE (node),
2506 TREE_PURPOSE (node), initp);
2508 /* Finish up the priority if-stmt body. */
2509 finish_then_clause (priority_if_stmt);
2510 finish_if_stmt (priority_if_stmt);
2514 /* Finish up the init/destruct if-stmt body. */
2515 finish_then_clause (init_if_stmt);
2516 finish_if_stmt (init_if_stmt);
2519 /* VARS is a list of variables with static storage duration which may
2520 need initialization and/or finalization. Remove those variables
2521 that don't really need to be initialized or finalized, and return
2522 the resulting list. The order in which the variables appear in
2523 VARS is in reverse order of the order in which they should actually
2524 be initialized. The list we return is in the unreversed order;
2525 i.e., the first variable should be initialized first. */
2528 prune_vars_needing_no_initialization (tree *vars)
2531 tree result = NULL_TREE;
2536 tree decl = TREE_VALUE (t);
2537 tree init = TREE_PURPOSE (t);
2539 /* Deal gracefully with error. */
2540 if (decl == error_mark_node)
2542 var = &TREE_CHAIN (t);
2546 /* The only things that can be initialized are variables. */
2547 gcc_assert (TREE_CODE (decl) == VAR_DECL);
2549 /* If this object is not defined, we don't need to do anything
2551 if (DECL_EXTERNAL (decl))
2553 var = &TREE_CHAIN (t);
2557 /* Also, if the initializer already contains errors, we can bail
2559 if (init && TREE_CODE (init) == TREE_LIST
2560 && value_member (error_mark_node, init))
2562 var = &TREE_CHAIN (t);
2566 /* This variable is going to need initialization and/or
2567 finalization, so we add it to the list. */
2568 *var = TREE_CHAIN (t);
2569 TREE_CHAIN (t) = result;
2576 /* Make sure we have told the back end about all the variables in
2580 write_out_vars (tree vars)
2584 for (v = vars; v; v = TREE_CHAIN (v))
2586 tree var = TREE_VALUE (v);
2587 if (!var_finalized_p (var))
2589 import_export_decl (var);
2590 rest_of_decl_compilation (var, 1, 1);
2595 /* Generate a static constructor (if CONSTRUCTOR_P) or destructor
2596 (otherwise) that will initialize all gobal objects with static
2597 storage duration having the indicated PRIORITY. */
2600 generate_ctor_or_dtor_function (bool constructor_p, int priority,
2609 input_location = *locus;
2610 #ifdef USE_MAPPED_LOCATION
2616 /* We use `I' to indicate initialization and `D' to indicate
2618 function_key = constructor_p ? 'I' : 'D';
2620 /* We emit the function lazily, to avoid generating empty
2621 global constructors and destructors. */
2624 /* For Objective-C++, we may need to initialize metadata found in this module.
2625 This must be done _before_ any other static initializations. */
2626 if (c_dialect_objc () && (priority == DEFAULT_INIT_PRIORITY)
2627 && constructor_p && objc_static_init_needed_p ())
2629 body = start_objects (function_key, priority);
2630 static_ctors = objc_generate_static_init_call (static_ctors);
2633 /* Call the static storage duration function with appropriate
2635 for (i = 0; VEC_iterate (tree, ssdf_decls, i, fndecl); ++i)
2637 /* Calls to pure or const functions will expand to nothing. */
2638 if (! (flags_from_decl_or_type (fndecl) & (ECF_CONST | ECF_PURE)))
2641 body = start_objects (function_key, priority);
2643 arguments = tree_cons (NULL_TREE,
2644 build_int_cst (NULL_TREE, priority),
2646 arguments = tree_cons (NULL_TREE,
2647 build_int_cst (NULL_TREE, constructor_p),
2649 finish_expr_stmt (build_function_call (fndecl, arguments));
2653 /* If we're generating code for the DEFAULT_INIT_PRIORITY, throw in
2654 calls to any functions marked with attributes indicating that
2655 they should be called at initialization- or destruction-time. */
2656 if (priority == DEFAULT_INIT_PRIORITY)
2660 for (fns = constructor_p ? static_ctors : static_dtors;
2662 fns = TREE_CHAIN (fns))
2664 fndecl = TREE_VALUE (fns);
2666 /* Calls to pure/const functions will expand to nothing. */
2667 if (! (flags_from_decl_or_type (fndecl) & (ECF_CONST | ECF_PURE)))
2670 body = start_objects (function_key, priority);
2671 finish_expr_stmt (build_function_call (fndecl, NULL_TREE));
2676 /* Close out the function. */
2678 finish_objects (function_key, priority, body);
2681 /* Generate constructor and destructor functions for the priority
2685 generate_ctor_and_dtor_functions_for_priority (splay_tree_node n, void * data)
2687 location_t *locus = (location_t *) data;
2688 int priority = (int) n->key;
2689 priority_info pi = (priority_info) n->value;
2691 /* Generate the functions themselves, but only if they are really
2693 if (pi->initializations_p
2694 || (priority == DEFAULT_INIT_PRIORITY && static_ctors))
2695 generate_ctor_or_dtor_function (/*constructor_p=*/true, priority, locus);
2696 if (pi->destructions_p
2697 || (priority == DEFAULT_INIT_PRIORITY && static_dtors))
2698 generate_ctor_or_dtor_function (/*constructor_p=*/false, priority, locus);
2700 /* Keep iterating. */
2704 /* Called via LANGHOOK_CALLGRAPH_ANALYZE_EXPR. It is supposed to mark
2705 decls referenced from frontend specific constructs; it will be called
2706 only for language-specific tree nodes.
2708 Here we must deal with member pointers. */
2711 cxx_callgraph_analyze_expr (tree *tp, int *walk_subtrees ATTRIBUTE_UNUSED,
2712 tree from ATTRIBUTE_UNUSED)
2716 switch (TREE_CODE (t))
2719 if (TYPE_PTRMEMFUNC_P (TREE_TYPE (t)))
2720 cgraph_mark_needed_node (cgraph_node (PTRMEM_CST_MEMBER (t)));
2723 if (TREE_CODE (BASELINK_FUNCTIONS (t)) == FUNCTION_DECL)
2724 cgraph_mark_needed_node (cgraph_node (BASELINK_FUNCTIONS (t)));
2727 if (DECL_VTABLE_OR_VTT_P (t))
2729 /* The ABI requires that all virtual tables be emitted
2730 whenever one of them is. */
2732 for (vtbl = CLASSTYPE_VTABLES (DECL_CONTEXT (t));
2734 vtbl = TREE_CHAIN (vtbl))
2735 mark_decl_referenced (vtbl);
2737 else if (DECL_CONTEXT (t)
2738 && TREE_CODE (DECL_CONTEXT (t)) == FUNCTION_DECL)
2739 /* If we need a static variable in a function, then we
2740 need the containing function. */
2741 mark_decl_referenced (DECL_CONTEXT (t));
2750 /* Java requires that we be able to reference a local address for a
2751 method, and not be confused by PLT entries. If hidden aliases are
2752 supported, emit one for each java function that we've emitted. */
2755 build_java_method_aliases (void)
2757 struct cgraph_node *node;
2759 #ifndef HAVE_GAS_HIDDEN
2763 for (node = cgraph_nodes; node ; node = node->next)
2765 tree fndecl = node->decl;
2767 if (TREE_ASM_WRITTEN (fndecl)
2768 && DECL_CONTEXT (fndecl)
2769 && TYPE_P (DECL_CONTEXT (fndecl))
2770 && TYPE_FOR_JAVA (DECL_CONTEXT (fndecl))
2771 && TARGET_USE_LOCAL_THUNK_ALIAS_P (fndecl))
2773 /* Mangle the name in a predictable way; we need to reference
2774 this from a java compiled object file. */
2775 tree oid, nid, alias;
2779 oid = DECL_ASSEMBLER_NAME (fndecl);
2780 oname = IDENTIFIER_POINTER (oid);
2781 gcc_assert (oname[0] == '_' && oname[1] == 'Z');
2782 nname = ACONCAT (("_ZGA", oname+2, NULL));
2783 nid = get_identifier (nname);
2785 alias = make_alias_for (fndecl, nid);
2786 TREE_PUBLIC (alias) = 1;
2787 DECL_VISIBILITY (alias) = VISIBILITY_HIDDEN;
2789 assemble_alias (alias, oid);
2794 /* This routine is called from the last rule in yyparse ().
2795 Its job is to create all the code needed to initialize and
2796 destroy the global aggregates. We do the destruction
2797 first, since that way we only need to reverse the decls once. */
2800 cp_finish_file (void)
2806 unsigned ssdf_count = 0;
2810 locus = input_location;
2813 /* Bad parse errors. Just forget about it. */
2814 if (! global_bindings_p () || current_class_type || decl_namespace_list)
2818 c_common_write_pch ();
2820 #ifdef USE_MAPPED_LOCATION
2823 /* Otherwise, GDB can get confused, because in only knows
2824 about source for LINENO-1 lines. */
2828 /* We now have to write out all the stuff we put off writing out.
2831 o Template specializations that we have not yet instantiated,
2832 but which are needed.
2833 o Initialization and destruction for non-local objects with
2834 static storage duration. (Local objects with static storage
2835 duration are initialized when their scope is first entered,
2836 and are cleaned up via atexit.)
2837 o Virtual function tables.
2839 All of these may cause others to be needed. For example,
2840 instantiating one function may cause another to be needed, and
2841 generating the initializer for an object may cause templates to be
2842 instantiated, etc., etc. */
2844 timevar_push (TV_VARCONST);
2846 emit_support_tinfos ();
2855 /* If there are templates that we've put off instantiating, do
2857 instantiate_pending_templates (retries);
2860 /* Write out virtual tables as required. Note that writing out
2861 the virtual table for a template class may cause the
2862 instantiation of members of that class. If we write out
2863 vtables then we remove the class from our list so we don't
2864 have to look at it again. */
2866 while (keyed_classes != NULL_TREE
2867 && maybe_emit_vtables (TREE_VALUE (keyed_classes)))
2870 keyed_classes = TREE_CHAIN (keyed_classes);
2876 tree next = TREE_CHAIN (t);
2880 if (maybe_emit_vtables (TREE_VALUE (next)))
2883 TREE_CHAIN (t) = TREE_CHAIN (next);
2888 next = TREE_CHAIN (t);
2892 /* Write out needed type info variables. We have to be careful
2893 looping through unemitted decls, because emit_tinfo_decl may
2894 cause other variables to be needed. New elements will be
2895 appended, and we remove from the vector those that actually
2897 for (i = VEC_length (tree, unemitted_tinfo_decls);
2898 VEC_iterate (tree, unemitted_tinfo_decls, --i, t);)
2899 if (emit_tinfo_decl (t))
2902 VEC_unordered_remove (tree, unemitted_tinfo_decls, i);
2905 /* The list of objects with static storage duration is built up
2906 in reverse order. We clear STATIC_AGGREGATES so that any new
2907 aggregates added during the initialization of these will be
2908 initialized in the correct order when we next come around the
2910 vars = prune_vars_needing_no_initialization (&static_aggregates);
2914 /* We need to start a new initialization function each time
2915 through the loop. That's because we need to know which
2916 vtables have been referenced, and TREE_SYMBOL_REFERENCED
2917 isn't computed until a function is finished, and written
2918 out. That's a deficiency in the back-end. When this is
2919 fixed, these initialization functions could all become
2920 inline, with resulting performance improvements. */
2923 /* Set the line and file, so that it is obviously not from
2925 input_location = locus;
2926 ssdf_body = start_static_storage_duration_function (ssdf_count);
2928 /* Make sure the back end knows about all the variables. */
2929 write_out_vars (vars);
2931 /* First generate code to do all the initializations. */
2933 do_static_initialization_or_destruction (vars, /*initp=*/true);
2935 /* Then, generate code to do all the destructions. Do these
2936 in reverse order so that the most recently constructed
2937 variable is the first destroyed. If we're using
2938 __cxa_atexit, then we don't need to do this; functions
2939 were registered at initialization time to destroy the
2941 if (!flag_use_cxa_atexit && vars)
2943 vars = nreverse (vars);
2944 do_static_initialization_or_destruction (vars, /*initp=*/false);
2949 /* Finish up the static storage duration function for this
2951 input_location = locus;
2952 finish_static_storage_duration_function (ssdf_body);
2954 /* All those initializations and finalizations might cause
2955 us to need more inline functions, more template
2956 instantiations, etc. */
2959 #ifdef USE_MAPPED_LOCATION
2966 /* Go through the set of inline functions whose bodies have not
2967 been emitted yet. If out-of-line copies of these functions
2968 are required, emit them. */
2969 for (i = 0; VEC_iterate (tree, deferred_fns, i, decl); ++i)
2971 /* Does it need synthesizing? */
2972 if (DECL_ARTIFICIAL (decl) && ! DECL_INITIAL (decl)
2973 && (! DECL_REALLY_EXTERN (decl) || DECL_INLINE (decl)))
2975 /* Even though we're already at the top-level, we push
2976 there again. That way, when we pop back a few lines
2977 hence, all of our state is restored. Otherwise,
2978 finish_function doesn't clean things up, and we end
2979 up with CURRENT_FUNCTION_DECL set. */
2980 push_to_top_level ();
2981 /* The decl's location will mark where it was first
2982 needed. Save that so synthesize method can indicate
2983 where it was needed from, in case of error */
2984 input_location = DECL_SOURCE_LOCATION (decl);
2985 synthesize_method (decl);
2986 pop_from_top_level ();
2990 if (!DECL_SAVED_TREE (decl))
2993 /* We lie to the back-end, pretending that some functions
2994 are not defined when they really are. This keeps these
2995 functions from being put out unnecessarily. But, we must
2996 stop lying when the functions are referenced, or if they
2997 are not comdat since they need to be put out now. If
2998 DECL_INTERFACE_KNOWN, then we have already set
2999 DECL_EXTERNAL appropriately, so there's no need to check
3000 again, and we do not want to clear DECL_EXTERNAL if a
3001 previous call to import_export_decl set it.
3003 This is done in a separate for cycle, because if some
3004 deferred function is contained in another deferred
3005 function later in deferred_fns varray,
3006 rest_of_compilation would skip this function and we
3007 really cannot expand the same function twice. */
3008 import_export_decl (decl);
3009 if (DECL_NOT_REALLY_EXTERN (decl)
3010 && DECL_INITIAL (decl)
3011 && decl_needed_p (decl))
3012 DECL_EXTERNAL (decl) = 0;
3014 /* If we're going to need to write this function out, and
3015 there's already a body for it, create RTL for it now.
3016 (There might be no body if this is a method we haven't
3017 gotten around to synthesizing yet.) */
3018 if (!DECL_EXTERNAL (decl)
3019 && decl_needed_p (decl)
3020 && !TREE_ASM_WRITTEN (decl)
3021 && !cgraph_node (decl)->local.finalized)
3023 /* We will output the function; no longer consider it in this
3025 DECL_DEFER_OUTPUT (decl) = 0;
3026 /* Generate RTL for this function now that we know we
3028 expand_or_defer_fn (decl);
3029 /* If we're compiling -fsyntax-only pretend that this
3030 function has been written out so that we don't try to
3032 if (flag_syntax_only)
3033 TREE_ASM_WRITTEN (decl) = 1;
3038 if (walk_namespaces (wrapup_globals_for_namespace, /*data=*/0))
3041 /* Static data members are just like namespace-scope globals. */
3042 for (i = 0; VEC_iterate (tree, pending_statics, i, decl); ++i)
3044 if (var_finalized_p (decl) || DECL_REALLY_EXTERN (decl))
3046 import_export_decl (decl);
3047 /* If this static data member is needed, provide it to the
3049 if (DECL_NOT_REALLY_EXTERN (decl) && decl_needed_p (decl))
3050 DECL_EXTERNAL (decl) = 0;
3052 if (VEC_length (tree, pending_statics) != 0
3053 && wrapup_global_declarations (VEC_address (tree, pending_statics),
3054 VEC_length (tree, pending_statics)))
3061 /* All used inline functions must have a definition at this point. */
3062 for (i = 0; VEC_iterate (tree, deferred_fns, i, decl); ++i)
3064 if (/* Check online inline functions that were actually used. */
3065 TREE_USED (decl) && DECL_DECLARED_INLINE_P (decl)
3066 /* If the definition actually was available here, then the
3067 fact that the function was not defined merely represents
3068 that for some reason (use of a template repository,
3069 #pragma interface, etc.) we decided not to emit the
3071 && !DECL_INITIAL (decl)
3072 /* An explicit instantiation can be used to specify
3073 that the body is in another unit. It will have
3074 already verified there was a definition. */
3075 && !DECL_EXPLICIT_INSTANTIATION (decl))
3077 warning (0, "inline function %q+D used but never defined", decl);
3078 /* Avoid a duplicate warning from check_global_declaration_1. */
3079 TREE_NO_WARNING (decl) = 1;
3083 /* We give C linkage to static constructors and destructors. */
3084 push_lang_context (lang_name_c);
3086 /* Generate initialization and destruction functions for all
3087 priorities for which they are required. */
3088 if (priority_info_map)
3089 splay_tree_foreach (priority_info_map,
3090 generate_ctor_and_dtor_functions_for_priority,
3094 /* If we have a ctor or this is obj-c++ and we need a static init,
3095 call generate_ctor_or_dtor_function. */
3096 if (static_ctors || (c_dialect_objc () && objc_static_init_needed_p ()))
3097 generate_ctor_or_dtor_function (/*constructor_p=*/true,
3098 DEFAULT_INIT_PRIORITY, &locus);
3100 generate_ctor_or_dtor_function (/*constructor_p=*/false,
3101 DEFAULT_INIT_PRIORITY, &locus);
3104 /* We're done with the splay-tree now. */
3105 if (priority_info_map)
3106 splay_tree_delete (priority_info_map);
3108 /* Generate any missing aliases. */
3109 maybe_apply_pending_pragma_weaks ();
3111 /* We're done with static constructors, so we can go back to "C++"
3113 pop_lang_context ();
3115 cgraph_finalize_compilation_unit ();
3118 /* Now, issue warnings about static, but not defined, functions,
3119 etc., and emit debugging information. */
3120 walk_namespaces (wrapup_globals_for_namespace, /*data=*/&reconsider);
3121 if (VEC_length (tree, pending_statics) != 0)
3123 check_global_declarations (VEC_address (tree, pending_statics),
3124 VEC_length (tree, pending_statics));
3125 emit_debug_global_declarations (VEC_address (tree, pending_statics),
3126 VEC_length (tree, pending_statics));
3129 /* Generate hidden aliases for Java. */
3130 build_java_method_aliases ();
3134 /* The entire file is now complete. If requested, dump everything
3138 FILE *stream = dump_begin (TDI_tu, &flags);
3142 dump_node (global_namespace, flags & ~TDF_SLIM, stream);
3143 dump_end (TDI_tu, stream);
3147 timevar_pop (TV_VARCONST);
3149 if (flag_detailed_statistics)
3151 dump_tree_statistics ();
3152 dump_time_statistics ();
3154 input_location = locus;
3156 #ifdef ENABLE_CHECKING
3157 validate_conversion_obstack ();
3158 #endif /* ENABLE_CHECKING */
3161 /* FN is an OFFSET_REF, DOTSTAR_EXPR or MEMBER_REF indicating the
3162 function to call in parse-tree form; it has not yet been
3163 semantically analyzed. ARGS are the arguments to the function.
3164 They have already been semantically analyzed. */
3167 build_offset_ref_call_from_tree (tree fn, tree args)
3176 object = TREE_OPERAND (fn, 0);
3178 if (processing_template_decl)
3180 gcc_assert (TREE_CODE (fn) == DOTSTAR_EXPR
3181 || TREE_CODE (fn) == MEMBER_REF);
3182 if (type_dependent_expression_p (fn)
3183 || any_type_dependent_arguments_p (args))
3184 return build_min_nt (CALL_EXPR, fn, args, NULL_TREE);
3186 /* Transform the arguments and add the implicit "this"
3187 parameter. That must be done before the FN is transformed
3188 because we depend on the form of FN. */
3189 args = build_non_dependent_args (args);
3190 if (TREE_CODE (fn) == DOTSTAR_EXPR)
3191 object = build_unary_op (ADDR_EXPR, object, 0);
3192 object = build_non_dependent_expr (object);
3193 args = tree_cons (NULL_TREE, object, args);
3194 /* Now that the arguments are done, transform FN. */
3195 fn = build_non_dependent_expr (fn);
3198 /* A qualified name corresponding to a bound pointer-to-member is
3199 represented as an OFFSET_REF:
3201 struct B { void g(); };
3203 void B::g() { (this->*p)(); } */
3204 if (TREE_CODE (fn) == OFFSET_REF)
3206 tree object_addr = build_unary_op (ADDR_EXPR, object, 0);
3207 fn = TREE_OPERAND (fn, 1);
3208 fn = get_member_function_from_ptrfunc (&object_addr, fn);
3209 args = tree_cons (NULL_TREE, object_addr, args);
3212 expr = build_function_call (fn, args);
3213 if (processing_template_decl && expr != error_mark_node)
3214 return build_min_non_dep (CALL_EXPR, expr, orig_fn, orig_args, NULL_TREE);
3220 check_default_args (tree x)
3222 tree arg = TYPE_ARG_TYPES (TREE_TYPE (x));
3223 bool saw_def = false;
3224 int i = 0 - (TREE_CODE (TREE_TYPE (x)) == METHOD_TYPE);
3225 for (; arg && arg != void_list_node; arg = TREE_CHAIN (arg), ++i)
3227 if (TREE_PURPOSE (arg))
3231 error ("default argument missing for parameter %P of %q+#D", i, x);
3232 TREE_PURPOSE (arg) = error_mark_node;
3237 /* Mark DECL (either a _DECL or a BASELINK) as "used" in the program.
3238 If DECL is a specialization or implicitly declared class member,
3239 generate the actual definition. */
3242 mark_used (tree decl)
3244 HOST_WIDE_INT saved_processing_template_decl = 0;
3246 /* If DECL is a BASELINK for a single function, then treat it just
3247 like the DECL for the function. Otherwise, if the BASELINK is
3248 for an overloaded function, we don't know which function was
3249 actually used until after overload resolution. */
3250 if (TREE_CODE (decl) == BASELINK)
3252 decl = BASELINK_FUNCTIONS (decl);
3253 if (really_overloaded_fn (decl))
3255 decl = OVL_CURRENT (decl);
3258 TREE_USED (decl) = 1;
3259 /* If we don't need a value, then we don't need to synthesize DECL. */
3260 if (skip_evaluation)
3262 /* Normally, we can wait until instantiation-time to synthesize
3263 DECL. However, if DECL is a static data member initialized with
3264 a constant, we need the value right now because a reference to
3265 such a data member is not value-dependent. */
3266 if (TREE_CODE (decl) == VAR_DECL
3267 && DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl)
3268 && DECL_CLASS_SCOPE_P (decl))
3270 /* Don't try to instantiate members of dependent types. We
3271 cannot just use dependent_type_p here because this function
3272 may be called from fold_non_dependent_expr, and then we may
3273 see dependent types, even though processing_template_decl
3275 if (CLASSTYPE_TEMPLATE_INFO ((DECL_CONTEXT (decl)))
3276 && uses_template_parms (CLASSTYPE_TI_ARGS (DECL_CONTEXT (decl))))
3278 /* Pretend that we are not in a template, even if we are, so
3279 that the static data member initializer will be processed. */
3280 saved_processing_template_decl = processing_template_decl;
3281 processing_template_decl = 0;
3284 if (processing_template_decl)
3287 if (TREE_CODE (decl) == FUNCTION_DECL && DECL_DECLARED_INLINE_P (decl)
3288 && !TREE_ASM_WRITTEN (decl))
3289 /* Remember it, so we can check it was defined. */
3291 if (DECL_DEFERRED_FN (decl))
3294 /* Remember the current location for a function we will end up
3295 synthesizing. Then we can inform the user where it was
3296 required in the case of error. */
3297 if (DECL_ARTIFICIAL (decl) && DECL_NONSTATIC_MEMBER_FUNCTION_P (decl)
3298 && !DECL_THUNK_P (decl))
3299 DECL_SOURCE_LOCATION (decl) = input_location;
3301 note_vague_linkage_fn (decl);
3304 assemble_external (decl);
3306 /* Is it a synthesized method that needs to be synthesized? */
3307 if (TREE_CODE (decl) == FUNCTION_DECL
3308 && DECL_NONSTATIC_MEMBER_FUNCTION_P (decl)
3309 && DECL_ARTIFICIAL (decl)
3310 && !DECL_THUNK_P (decl)
3311 && ! DECL_INITIAL (decl)
3312 /* Kludge: don't synthesize for default args. Unfortunately this
3313 rules out initializers of namespace-scoped objects too, but
3314 it's sort-of ok if the implicit ctor or dtor decl keeps
3315 pointing to the class location. */
3316 && current_function_decl)
3318 synthesize_method (decl);
3319 /* If we've already synthesized the method we don't need to
3320 do the instantiation test below. */
3322 else if ((DECL_NON_THUNK_FUNCTION_P (decl) || TREE_CODE (decl) == VAR_DECL)
3323 && DECL_LANG_SPECIFIC (decl) && DECL_TEMPLATE_INFO (decl)
3324 && (!DECL_EXPLICIT_INSTANTIATION (decl)
3325 || (TREE_CODE (decl) == FUNCTION_DECL
3326 && DECL_INLINE (DECL_TEMPLATE_RESULT
3327 (template_for_substitution (decl))))
3328 /* We need to instantiate static data members so that there
3329 initializers are available in integral constant
3331 || (TREE_CODE (decl) == VAR_DECL
3332 && DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl))))
3333 /* If this is a function or variable that is an instance of some
3334 template, we now know that we will need to actually do the
3335 instantiation. We check that DECL is not an explicit
3336 instantiation because that is not checked in instantiate_decl.
3338 We put off instantiating functions in order to improve compile
3339 times. Maintaining a stack of active functions is expensive,
3340 and the inliner knows to instantiate any functions it might
3341 need. Therefore, we always try to defer instantiation. */
3342 instantiate_decl (decl, /*defer_ok=*/true,
3343 /*expl_inst_class_mem_p=*/false);
3345 processing_template_decl = saved_processing_template_decl;
3348 #include "gt-cp-decl2.h"