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 (tree, tree);
77 static void do_static_destruction (tree);
78 static tree start_static_initialization_or_destruction (tree, int);
79 static void finish_static_initialization_or_destruction (tree);
80 static void generate_ctor_or_dtor_function (bool, int, location_t *);
81 static int generate_ctor_and_dtor_functions_for_priority (splay_tree_node,
83 static tree prune_vars_needing_no_initialization (tree *);
84 static void write_out_vars (tree);
85 static void import_export_class (tree);
86 static tree get_guard_bits (tree);
88 /* A list of static class variables. This is needed, because a
89 static class variable can be declared inside the class without
90 an initializer, and then initialized, statically, outside the class. */
91 static GTY(()) VEC(tree,gc) *pending_statics;
93 /* A list of functions which were declared inline, but which we
94 may need to emit outline anyway. */
95 static GTY(()) VEC(tree,gc) *deferred_fns;
97 /* Nonzero if we're done parsing and into end-of-file activities. */
101 /* Functions called along with real static constructors and destructors. */
107 /* Incorporate `const' and `volatile' qualifiers for member functions.
108 FUNCTION is a TYPE_DECL or a FUNCTION_DECL.
109 QUALS is a list of qualifiers. Returns any explicit
110 top-level qualifiers of the method's this pointer, anything other than
111 TYPE_UNQUALIFIED will be an extension. */
114 grok_method_quals (tree ctype, tree function, cp_cv_quals quals)
116 tree fntype = TREE_TYPE (function);
117 tree raises = TYPE_RAISES_EXCEPTIONS (fntype);
118 int type_quals = TYPE_UNQUALIFIED;
119 int this_quals = TYPE_UNQUALIFIED;
121 type_quals = quals & ~TYPE_QUAL_RESTRICT;
122 this_quals = quals & TYPE_QUAL_RESTRICT;
124 ctype = cp_build_qualified_type (ctype, type_quals);
125 fntype = build_method_type_directly (ctype, TREE_TYPE (fntype),
126 (TREE_CODE (fntype) == METHOD_TYPE
127 ? TREE_CHAIN (TYPE_ARG_TYPES (fntype))
128 : TYPE_ARG_TYPES (fntype)));
130 fntype = build_exception_variant (fntype, raises);
132 TREE_TYPE (function) = fntype;
136 /* Build a PARM_DECL with NAME and TYPE, and set DECL_ARG_TYPE
140 cp_build_parm_decl (tree name, tree type)
142 tree parm = build_decl (PARM_DECL, name, type);
143 /* DECL_ARG_TYPE is only used by the back end and the back end never
145 if (!processing_template_decl)
146 DECL_ARG_TYPE (parm) = type_passed_as (type);
150 /* Returns a PARM_DECL for a parameter of the indicated TYPE, with the
154 build_artificial_parm (tree name, tree type)
156 tree parm = cp_build_parm_decl (name, type);
157 DECL_ARTIFICIAL (parm) = 1;
158 /* All our artificial parms are implicitly `const'; they cannot be
160 TREE_READONLY (parm) = 1;
164 /* Constructors for types with virtual baseclasses need an "in-charge" flag
165 saying whether this constructor is responsible for initialization of
166 virtual baseclasses or not. All destructors also need this "in-charge"
167 flag, which additionally determines whether or not the destructor should
168 free the memory for the object.
170 This function adds the "in-charge" flag to member function FN if
171 appropriate. It is called from grokclassfn and tsubst.
172 FN must be either a constructor or destructor.
174 The in-charge flag follows the 'this' parameter, and is followed by the
175 VTT parm (if any), then the user-written parms. */
178 maybe_retrofit_in_chrg (tree fn)
180 tree basetype, arg_types, parms, parm, fntype;
182 /* If we've already add the in-charge parameter don't do it again. */
183 if (DECL_HAS_IN_CHARGE_PARM_P (fn))
186 /* When processing templates we can't know, in general, whether or
187 not we're going to have virtual baseclasses. */
188 if (processing_template_decl)
191 /* We don't need an in-charge parameter for constructors that don't
192 have virtual bases. */
193 if (DECL_CONSTRUCTOR_P (fn)
194 && !CLASSTYPE_VBASECLASSES (DECL_CONTEXT (fn)))
197 arg_types = TYPE_ARG_TYPES (TREE_TYPE (fn));
198 basetype = TREE_TYPE (TREE_VALUE (arg_types));
199 arg_types = TREE_CHAIN (arg_types);
201 parms = TREE_CHAIN (DECL_ARGUMENTS (fn));
203 /* If this is a subobject constructor or destructor, our caller will
204 pass us a pointer to our VTT. */
205 if (CLASSTYPE_VBASECLASSES (DECL_CONTEXT (fn)))
207 parm = build_artificial_parm (vtt_parm_identifier, vtt_parm_type);
209 /* First add it to DECL_ARGUMENTS between 'this' and the real args... */
210 TREE_CHAIN (parm) = parms;
213 /* ...and then to TYPE_ARG_TYPES. */
214 arg_types = hash_tree_chain (vtt_parm_type, arg_types);
216 DECL_HAS_VTT_PARM_P (fn) = 1;
219 /* Then add the in-charge parm (before the VTT parm). */
220 parm = build_artificial_parm (in_charge_identifier, integer_type_node);
221 TREE_CHAIN (parm) = parms;
223 arg_types = hash_tree_chain (integer_type_node, arg_types);
225 /* Insert our new parameter(s) into the list. */
226 TREE_CHAIN (DECL_ARGUMENTS (fn)) = parms;
228 /* And rebuild the function type. */
229 fntype = build_method_type_directly (basetype, TREE_TYPE (TREE_TYPE (fn)),
231 if (TYPE_RAISES_EXCEPTIONS (TREE_TYPE (fn)))
232 fntype = build_exception_variant (fntype,
233 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (fn)));
234 TREE_TYPE (fn) = fntype;
236 /* Now we've got the in-charge parameter. */
237 DECL_HAS_IN_CHARGE_PARM_P (fn) = 1;
240 /* Classes overload their constituent function names automatically.
241 When a function name is declared in a record structure,
242 its name is changed to it overloaded name. Since names for
243 constructors and destructors can conflict, we place a leading
246 CNAME is the name of the class we are grokking for.
248 FUNCTION is a FUNCTION_DECL. It was created by `grokdeclarator'.
250 FLAGS contains bits saying what's special about today's
251 arguments. 1 == DESTRUCTOR. 2 == OPERATOR.
253 If FUNCTION is a destructor, then we must add the `auto-delete' field
254 as a second parameter. There is some hair associated with the fact
255 that we must "declare" this variable in the manner consistent with the
256 way the rest of the arguments were declared.
258 QUALS are the qualifiers for the this pointer. */
261 grokclassfn (tree ctype, tree function, enum overload_flags flags,
264 tree fn_name = DECL_NAME (function);
265 cp_cv_quals this_quals = TYPE_UNQUALIFIED;
267 /* Even within an `extern "C"' block, members get C++ linkage. See
268 [dcl.link] for details. */
269 SET_DECL_LANGUAGE (function, lang_cplusplus);
271 if (fn_name == NULL_TREE)
273 error ("name missing for member function");
274 fn_name = get_identifier ("<anonymous>");
275 DECL_NAME (function) = fn_name;
279 this_quals = grok_method_quals (ctype, function, quals);
281 if (TREE_CODE (TREE_TYPE (function)) == METHOD_TYPE)
283 /* Must add the class instance variable up front. */
284 /* Right now we just make this a pointer. But later
285 we may wish to make it special. */
286 tree type = TREE_VALUE (TYPE_ARG_TYPES (TREE_TYPE (function)));
290 /* The `this' parameter is implicitly `const'; it cannot be
292 this_quals |= TYPE_QUAL_CONST;
293 qual_type = cp_build_qualified_type (type, this_quals);
294 parm = build_artificial_parm (this_identifier, qual_type);
295 cp_apply_type_quals_to_decl (this_quals, parm);
296 TREE_CHAIN (parm) = DECL_ARGUMENTS (function);
297 DECL_ARGUMENTS (function) = parm;
300 DECL_CONTEXT (function) = ctype;
302 if (flags == DTOR_FLAG)
303 DECL_DESTRUCTOR_P (function) = 1;
305 if (flags == DTOR_FLAG || DECL_CONSTRUCTOR_P (function))
306 maybe_retrofit_in_chrg (function);
309 /* Create an ARRAY_REF, checking for the user doing things backwards
313 grok_array_decl (tree array_expr, tree index_exp)
317 tree orig_array_expr = array_expr;
318 tree orig_index_exp = index_exp;
320 if (error_operand_p (array_expr) || error_operand_p (index_exp))
321 return error_mark_node;
323 if (processing_template_decl)
325 if (type_dependent_expression_p (array_expr)
326 || type_dependent_expression_p (index_exp))
327 return build_min_nt (ARRAY_REF, array_expr, index_exp,
328 NULL_TREE, NULL_TREE);
329 array_expr = build_non_dependent_expr (array_expr);
330 index_exp = build_non_dependent_expr (index_exp);
333 type = TREE_TYPE (array_expr);
335 type = non_reference (type);
337 /* If they have an `operator[]', use that. */
338 if (IS_AGGR_TYPE (type) || IS_AGGR_TYPE (TREE_TYPE (index_exp)))
339 expr = build_new_op (ARRAY_REF, LOOKUP_NORMAL,
340 array_expr, index_exp, NULL_TREE,
341 /*overloaded_p=*/NULL);
346 /* Otherwise, create an ARRAY_REF for a pointer or array type.
347 It is a little-known fact that, if `a' is an array and `i' is
348 an int, you can write `i[a]', which means the same thing as
350 if (TREE_CODE (type) == ARRAY_TYPE)
353 p1 = build_expr_type_conversion (WANT_POINTER, array_expr, false);
355 if (TREE_CODE (TREE_TYPE (index_exp)) == ARRAY_TYPE)
358 p2 = build_expr_type_conversion (WANT_POINTER, index_exp, false);
360 i1 = build_expr_type_conversion (WANT_INT | WANT_ENUM, array_expr,
362 i2 = build_expr_type_conversion (WANT_INT | WANT_ENUM, index_exp,
365 if ((p1 && i2) && (i1 && p2))
366 error ("ambiguous conversion for array subscript");
369 array_expr = p1, index_exp = i2;
371 array_expr = p2, index_exp = i1;
374 error ("invalid types %<%T[%T]%> for array subscript",
375 type, TREE_TYPE (index_exp));
376 return error_mark_node;
379 if (array_expr == error_mark_node || index_exp == error_mark_node)
380 error ("ambiguous conversion for array subscript");
382 expr = build_array_ref (array_expr, index_exp);
384 if (processing_template_decl && expr != error_mark_node)
385 return build_min_non_dep (ARRAY_REF, expr, orig_array_expr, orig_index_exp,
386 NULL_TREE, NULL_TREE);
390 /* Given the cast expression EXP, checking out its validity. Either return
391 an error_mark_node if there was an unavoidable error, return a cast to
392 void for trying to delete a pointer w/ the value 0, or return the
393 call to delete. If DOING_VEC is true, we handle things differently
394 for doing an array delete.
395 Implements ARM $5.3.4. This is called from the parser. */
398 delete_sanity (tree exp, tree size, bool doing_vec, int use_global_delete)
402 if (exp == error_mark_node)
405 if (processing_template_decl)
407 t = build_min (DELETE_EXPR, void_type_node, exp, size);
408 DELETE_EXPR_USE_GLOBAL (t) = use_global_delete;
409 DELETE_EXPR_USE_VEC (t) = doing_vec;
410 TREE_SIDE_EFFECTS (t) = 1;
414 /* An array can't have been allocated by new, so complain. */
415 if (TREE_CODE (exp) == VAR_DECL
416 && TREE_CODE (TREE_TYPE (exp)) == ARRAY_TYPE)
417 warning (0, "deleting array %q#D", exp);
419 t = build_expr_type_conversion (WANT_POINTER, exp, true);
421 if (t == NULL_TREE || t == error_mark_node)
423 error ("type %q#T argument given to %<delete%>, expected pointer",
425 return error_mark_node;
428 type = TREE_TYPE (t);
430 /* As of Valley Forge, you can delete a pointer to const. */
432 /* You can't delete functions. */
433 if (TREE_CODE (TREE_TYPE (type)) == FUNCTION_TYPE)
435 error ("cannot delete a function. Only pointer-to-objects are "
436 "valid arguments to %<delete%>");
437 return error_mark_node;
440 /* Deleting ptr to void is undefined behavior [expr.delete/3]. */
441 if (TREE_CODE (TREE_TYPE (type)) == VOID_TYPE)
443 warning (0, "deleting %qT is undefined", type);
447 /* Deleting a pointer with the value zero is valid and has no effect. */
448 if (integer_zerop (t))
449 return build1 (NOP_EXPR, void_type_node, t);
452 return build_vec_delete (t, /*maxindex=*/NULL_TREE,
453 sfk_deleting_destructor,
456 return build_delete (type, t, sfk_deleting_destructor,
457 LOOKUP_NORMAL, use_global_delete);
460 /* Report an error if the indicated template declaration is not the
461 sort of thing that should be a member template. */
464 check_member_template (tree tmpl)
468 gcc_assert (TREE_CODE (tmpl) == TEMPLATE_DECL);
469 decl = DECL_TEMPLATE_RESULT (tmpl);
471 if (TREE_CODE (decl) == FUNCTION_DECL
472 || (TREE_CODE (decl) == TYPE_DECL
473 && IS_AGGR_TYPE (TREE_TYPE (decl))))
475 if (current_function_decl)
476 /* 14.5.2.2 [temp.mem]
478 A local class shall not have member templates. */
479 error ("invalid declaration of member template %q#D in local class",
482 if (TREE_CODE (decl) == FUNCTION_DECL && DECL_VIRTUAL_P (decl))
484 /* 14.5.2.3 [temp.mem]
486 A member function template shall not be virtual. */
488 ("invalid use of %<virtual%> in template declaration of %q#D",
490 DECL_VIRTUAL_P (decl) = 0;
493 /* The debug-information generating code doesn't know what to do
494 with member templates. */
495 DECL_IGNORED_P (tmpl) = 1;
498 error ("template declaration of %q#D", decl);
501 /* Return true iff TYPE is a valid Java parameter or return type. */
504 acceptable_java_type (tree type)
506 if (TREE_CODE (type) == VOID_TYPE || TYPE_FOR_JAVA (type))
508 if (TREE_CODE (type) == POINTER_TYPE || TREE_CODE (type) == REFERENCE_TYPE)
510 type = TREE_TYPE (type);
511 if (TREE_CODE (type) == RECORD_TYPE)
514 if (! TYPE_FOR_JAVA (type))
516 if (! CLASSTYPE_TEMPLATE_INFO (type))
518 args = CLASSTYPE_TI_ARGS (type);
519 i = TREE_VEC_LENGTH (args);
522 type = TREE_VEC_ELT (args, i);
523 if (TREE_CODE (type) == POINTER_TYPE)
524 type = TREE_TYPE (type);
525 if (! TYPE_FOR_JAVA (type))
534 /* For a METHOD in a Java class CTYPE, return true if
535 the parameter and return types are valid Java types.
536 Otherwise, print appropriate error messages, and return false. */
539 check_java_method (tree method)
542 tree arg_types = TYPE_ARG_TYPES (TREE_TYPE (method));
543 tree ret_type = TREE_TYPE (TREE_TYPE (method));
545 if (!acceptable_java_type (ret_type))
547 error ("Java method %qD has non-Java return type %qT",
552 arg_types = TREE_CHAIN (arg_types);
553 if (DECL_HAS_IN_CHARGE_PARM_P (method))
554 arg_types = TREE_CHAIN (arg_types);
555 if (DECL_HAS_VTT_PARM_P (method))
556 arg_types = TREE_CHAIN (arg_types);
558 for (; arg_types != NULL_TREE; arg_types = TREE_CHAIN (arg_types))
560 tree type = TREE_VALUE (arg_types);
561 if (!acceptable_java_type (type))
563 error ("Java method %qD has non-Java parameter type %qT",
571 /* Sanity check: report error if this function FUNCTION is not
572 really a member of the class (CTYPE) it is supposed to belong to.
573 TEMPLATE_PARMS is used to specify the template parameters of a member
574 template passed as FUNCTION_DECL. If the member template is passed as a
575 TEMPLATE_DECL, it can be NULL since the parameters can be extracted
576 from the declaration. If the function is not a function template, it
578 It returns the original declaration for the function, or NULL_TREE
579 if no declaration was found (and an error was emitted). */
582 check_classfn (tree ctype, tree function, tree template_parms)
587 if (DECL_USE_TEMPLATE (function)
588 && !(TREE_CODE (function) == TEMPLATE_DECL
589 && DECL_TEMPLATE_SPECIALIZATION (function))
590 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (function)))
591 /* Since this is a specialization of a member template,
592 we're not going to find the declaration in the class.
595 struct S { template <typename T> void f(T); };
596 template <> void S::f(int);
598 we're not going to find `S::f(int)', but there's no
599 reason we should, either. We let our callers know we didn't
600 find the method, but we don't complain. */
603 /* Basic sanity check: for a template function, the template parameters
604 either were not passed, or they are the same of DECL_TEMPLATE_PARMS. */
605 if (TREE_CODE (function) == TEMPLATE_DECL)
607 gcc_assert (!template_parms
608 || comp_template_parms (template_parms,
609 DECL_TEMPLATE_PARMS (function)));
610 template_parms = DECL_TEMPLATE_PARMS (function);
613 /* OK, is this a definition of a member template? */
614 is_template = (template_parms != NULL_TREE);
616 ix = class_method_index_for_fn (complete_type (ctype), function);
619 VEC(tree,gc) *methods = CLASSTYPE_METHOD_VEC (ctype);
620 tree fndecls, fndecl = 0;
623 const char *format = NULL;
625 pushed_scope = push_scope (ctype);
626 for (fndecls = VEC_index (tree, methods, ix);
627 fndecls; fndecls = OVL_NEXT (fndecls))
631 fndecl = OVL_CURRENT (fndecls);
632 p1 = TYPE_ARG_TYPES (TREE_TYPE (function));
633 p2 = TYPE_ARG_TYPES (TREE_TYPE (fndecl));
635 /* We cannot simply call decls_match because this doesn't
636 work for static member functions that are pretending to
637 be methods, and because the name may have been changed by
640 /* Get rid of the this parameter on functions that become
642 if (DECL_STATIC_FUNCTION_P (fndecl)
643 && TREE_CODE (TREE_TYPE (function)) == METHOD_TYPE)
644 p1 = TREE_CHAIN (p1);
646 /* A member template definition only matches a member template
648 if (is_template != (TREE_CODE (fndecl) == TEMPLATE_DECL))
651 if (same_type_p (TREE_TYPE (TREE_TYPE (function)),
652 TREE_TYPE (TREE_TYPE (fndecl)))
653 && compparms (p1, p2)
655 || comp_template_parms (template_parms,
656 DECL_TEMPLATE_PARMS (fndecl)))
657 && (DECL_TEMPLATE_SPECIALIZATION (function)
658 == DECL_TEMPLATE_SPECIALIZATION (fndecl))
659 && (!DECL_TEMPLATE_SPECIALIZATION (function)
660 || (DECL_TI_TEMPLATE (function)
661 == DECL_TI_TEMPLATE (fndecl))))
665 pop_scope (pushed_scope);
667 return OVL_CURRENT (fndecls);
668 error ("prototype for %q#D does not match any in class %qT",
670 is_conv_op = DECL_CONV_FN_P (fndecl);
673 ix = CLASSTYPE_FIRST_CONVERSION_SLOT;
674 fndecls = VEC_index (tree, methods, ix);
677 fndecl = OVL_CURRENT (fndecls);
678 fndecls = OVL_NEXT (fndecls);
680 if (!fndecls && is_conv_op)
682 if (VEC_length (tree, methods) > (size_t) ++ix)
684 fndecls = VEC_index (tree, methods, ix);
685 if (!DECL_CONV_FN_P (OVL_CURRENT (fndecls)))
697 format = N_("candidates are: %+#D");
699 format = N_("candidate is: %+#D");
700 error (format, fndecl);
703 else if (!COMPLETE_TYPE_P (ctype))
704 cxx_incomplete_type_error (function, ctype);
706 error ("no %q#D member function declared in class %qT",
709 /* If we did not find the method in the class, add it to avoid
710 spurious errors (unless the CTYPE is not yet defined, in which
711 case we'll only confuse ourselves when the function is declared
712 properly within the class. */
713 if (COMPLETE_TYPE_P (ctype))
714 add_method (ctype, function, NULL_TREE);
718 /* DECL is a function with vague linkage. Remember it so that at the
719 end of the translation unit we can decide whether or not to emit
723 note_vague_linkage_fn (tree decl)
725 if (!DECL_DEFERRED_FN (decl))
727 DECL_DEFERRED_FN (decl) = 1;
728 DECL_DEFER_OUTPUT (decl) = 1;
729 VEC_safe_push (tree, gc, deferred_fns, decl);
733 /* Like note_vague_linkage_fn but for variables. */
736 note_vague_linkage_var (tree var)
738 VEC_safe_push (tree, gc, pending_statics, var);
741 /* We have just processed the DECL, which is a static data member.
742 Its initializer, if present, is INIT. The ASMSPEC_TREE, if
743 present, is the assembly-language name for the data member.
744 FLAGS is as for cp_finish_decl. */
747 finish_static_data_member_decl (tree decl, tree init, tree asmspec_tree,
750 gcc_assert (TREE_PUBLIC (decl));
752 DECL_CONTEXT (decl) = current_class_type;
754 /* We cannot call pushdecl here, because that would fill in the
755 TREE_CHAIN of our decl. Instead, we modify cp_finish_decl to do
756 the right thing, namely, to put this decl out straight away. */
757 /* current_class_type can be NULL_TREE in case of error. */
758 if (!asmspec_tree && current_class_type)
759 DECL_INITIAL (decl) = error_mark_node;
761 if (! processing_template_decl)
762 note_vague_linkage_var (decl);
764 if (LOCAL_CLASS_P (current_class_type))
765 pedwarn ("local class %q#T shall not have static data member %q#D",
766 current_class_type, decl);
768 /* Static consts need not be initialized in the class definition. */
769 if (init != NULL_TREE && TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl)))
771 static int explained = 0;
773 error ("initializer invalid for static member with constructor");
776 error ("(an out of class initialization is required)");
781 /* Force the compiler to know when an uninitialized static const
782 member is being used. */
783 if (CP_TYPE_CONST_P (TREE_TYPE (decl)) && init == 0)
784 TREE_USED (decl) = 1;
785 DECL_INITIAL (decl) = init;
786 DECL_IN_AGGR_P (decl) = 1;
788 cp_finish_decl (decl, init, asmspec_tree, flags);
791 /* Process the specs, declarator (NULL if omitted) and width (NULL if omitted)
792 of a structure component, returning a _DECL node.
793 QUALS is a list of type qualifiers for this decl (such as for declaring
794 const member functions).
796 This is done during the parsing of the struct declaration.
797 The _DECL nodes are chained together and the lot of them
798 are ultimately passed to `build_struct' to make the RECORD_TYPE node.
800 If class A defines that certain functions in class B are friends, then
801 the way I have set things up, it is B who is interested in permission
802 granted by A. However, it is in A's context that these declarations
803 are parsed. By returning a void_type_node, class A does not attempt
804 to incorporate the declarations of the friends within its structure.
806 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
807 CHANGES TO CODE IN `start_method'. */
810 grokfield (const cp_declarator *declarator,
811 cp_decl_specifier_seq *declspecs,
812 tree init, tree asmspec_tree,
816 const char *asmspec = 0;
817 int flags = LOOKUP_ONLYCONVERTING;
819 if (!declspecs->any_specifiers_p
820 && declarator->kind == cdk_id
821 && declarator->u.id.qualifying_scope
822 && TREE_CODE (declarator->u.id.unqualified_name) == IDENTIFIER_NODE)
823 /* Access declaration */
824 return do_class_using_decl (declarator->u.id.qualifying_scope,
825 declarator->u.id.unqualified_name);
828 && TREE_CODE (init) == TREE_LIST
829 && TREE_VALUE (init) == error_mark_node
830 && TREE_CHAIN (init) == NULL_TREE)
833 value = grokdeclarator (declarator, declspecs, FIELD, init != 0, &attrlist);
834 if (! value || error_operand_p (value))
835 /* friend or constructor went bad. */
836 return error_mark_node;
838 if (TREE_CODE (value) == TYPE_DECL && init)
840 error ("typedef %qD is initialized (use __typeof__ instead)", value);
844 /* Pass friendly classes back. */
845 if (value == void_type_node)
848 /* Pass friend decls back. */
849 if ((TREE_CODE (value) == FUNCTION_DECL
850 || TREE_CODE (value) == TEMPLATE_DECL)
851 && DECL_CONTEXT (value) != current_class_type)
854 if (DECL_NAME (value) != NULL_TREE
855 && IDENTIFIER_POINTER (DECL_NAME (value))[0] == '_'
856 && ! strcmp (IDENTIFIER_POINTER (DECL_NAME (value)), "_vptr"))
857 error ("member %qD conflicts with virtual function table field name",
860 /* Stash away type declarations. */
861 if (TREE_CODE (value) == TYPE_DECL)
863 DECL_NONLOCAL (value) = 1;
864 DECL_CONTEXT (value) = current_class_type;
866 if (processing_template_decl)
867 value = push_template_decl (value);
871 /* Avoid storing attributes in template parameters:
872 tsubst is not ready to handle them. */
873 tree type = TREE_TYPE (value);
874 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM
875 || TREE_CODE (type) == BOUND_TEMPLATE_TEMPLATE_PARM)
876 sorry ("applying attributes to template parameters is not implemented");
878 cplus_decl_attributes (&value, attrlist, 0);
884 if (DECL_IN_AGGR_P (value))
886 error ("%qD is already defined in %qT", value, DECL_CONTEXT (value));
887 return void_type_node;
891 asmspec = TREE_STRING_POINTER (asmspec_tree);
895 if (TREE_CODE (value) == FUNCTION_DECL)
897 /* Initializers for functions are rejected early in the parser.
898 If we get here, it must be a pure specifier for a method. */
899 if (TREE_CODE (TREE_TYPE (value)) == METHOD_TYPE)
901 gcc_assert (error_operand_p (init) || integer_zerop (init));
902 DECL_PURE_VIRTUAL_P (value) = 1;
906 gcc_assert (TREE_CODE (TREE_TYPE (value)) == FUNCTION_TYPE);
907 error ("initializer specified for static member function %qD",
911 else if (pedantic && TREE_CODE (value) != VAR_DECL)
912 /* Already complained in grokdeclarator. */
914 else if (!processing_template_decl)
916 if (TREE_CODE (init) == CONSTRUCTOR)
917 init = digest_init (TREE_TYPE (value), init);
919 init = integral_constant_value (init);
921 if (init != error_mark_node && !TREE_CONSTANT (init))
923 /* We can allow references to things that are effectively
924 static, since references are initialized with the
926 if (TREE_CODE (TREE_TYPE (value)) != REFERENCE_TYPE
927 || (TREE_STATIC (init) == 0
928 && (!DECL_P (init) || DECL_EXTERNAL (init) == 0)))
930 error ("field initializer is not constant");
931 init = error_mark_node;
937 if (processing_template_decl
938 && (TREE_CODE (value) == VAR_DECL || TREE_CODE (value) == FUNCTION_DECL))
940 value = push_template_decl (value);
941 if (error_operand_p (value))
942 return error_mark_node;
946 cplus_decl_attributes (&value, attrlist, 0);
948 switch (TREE_CODE (value))
951 finish_static_data_member_decl (value, init, asmspec_tree,
957 error ("%<asm%> specifiers are not permitted on non-static data members");
958 if (DECL_INITIAL (value) == error_mark_node)
959 init = error_mark_node;
960 cp_finish_decl (value, init, NULL_TREE, flags);
961 DECL_INITIAL (value) = init;
962 DECL_IN_AGGR_P (value) = 1;
967 set_user_assembler_name (value, asmspec);
968 if (!DECL_FRIEND_P (value))
969 grok_special_member_properties (value);
971 cp_finish_decl (value, init, asmspec_tree, flags);
973 /* Pass friends back this way. */
974 if (DECL_FRIEND_P (value))
975 return void_type_node;
977 DECL_IN_AGGR_P (value) = 1;
986 /* Like `grokfield', but for bitfields.
987 WIDTH is non-NULL for bit fields only, and is an INTEGER_CST node. */
990 grokbitfield (const cp_declarator *declarator,
991 cp_decl_specifier_seq *declspecs, tree width)
993 tree value = grokdeclarator (declarator, declspecs, BITFIELD, 0, NULL);
995 if (! value) return NULL_TREE; /* friends went bad. */
997 /* Pass friendly classes back. */
998 if (TREE_CODE (value) == VOID_TYPE)
999 return void_type_node;
1001 if (TREE_CODE (value) == TYPE_DECL)
1003 error ("cannot declare %qD to be a bit-field type", value);
1007 /* Usually, finish_struct_1 catches bitfields with invalid types.
1008 But, in the case of bitfields with function type, we confuse
1009 ourselves into thinking they are member functions, so we must
1011 if (TREE_CODE (value) == FUNCTION_DECL)
1013 error ("cannot declare bit-field %qD with function type",
1018 if (DECL_IN_AGGR_P (value))
1020 error ("%qD is already defined in the class %qT", value,
1021 DECL_CONTEXT (value));
1022 return void_type_node;
1025 if (TREE_STATIC (value))
1027 error ("static member %qD cannot be a bit-field", value);
1030 cp_finish_decl (value, NULL_TREE, NULL_TREE, 0);
1032 if (width != error_mark_node)
1034 constant_expression_warning (width);
1035 DECL_INITIAL (value) = width;
1036 SET_DECL_C_BIT_FIELD (value);
1039 DECL_IN_AGGR_P (value) = 1;
1045 cplus_decl_attributes (tree *decl, tree attributes, int flags)
1047 if (*decl == NULL_TREE || *decl == void_type_node)
1050 if (TREE_CODE (*decl) == TEMPLATE_DECL)
1051 decl = &DECL_TEMPLATE_RESULT (*decl);
1053 decl_attributes (decl, attributes, flags);
1055 if (TREE_CODE (*decl) == TYPE_DECL)
1056 SET_IDENTIFIER_TYPE_VALUE (DECL_NAME (*decl), TREE_TYPE (*decl));
1059 /* Walks through the namespace- or function-scope anonymous union
1060 OBJECT, with the indicated TYPE, building appropriate ALIAS_DECLs.
1061 Returns one of the fields for use in the mangled name. */
1064 build_anon_union_vars (tree type, tree object)
1066 tree main_decl = NULL_TREE;
1069 /* Rather than write the code to handle the non-union case,
1070 just give an error. */
1071 if (TREE_CODE (type) != UNION_TYPE)
1072 error ("anonymous struct not inside named type");
1074 for (field = TYPE_FIELDS (type);
1076 field = TREE_CHAIN (field))
1081 if (DECL_ARTIFICIAL (field))
1083 if (TREE_CODE (field) != FIELD_DECL)
1085 pedwarn ("%q+#D invalid; an anonymous union can only "
1086 "have non-static data members", field);
1090 if (TREE_PRIVATE (field))
1091 pedwarn ("private member %q+#D in anonymous union", field);
1092 else if (TREE_PROTECTED (field))
1093 pedwarn ("protected member %q+#D in anonymous union", field);
1095 if (processing_template_decl)
1096 ref = build_min_nt (COMPONENT_REF, object,
1097 DECL_NAME (field), NULL_TREE);
1099 ref = build_class_member_access_expr (object, field, NULL_TREE,
1102 if (DECL_NAME (field))
1104 decl = build_decl (ALIAS_DECL, DECL_NAME (field), TREE_TYPE (field));
1105 DECL_INITIAL (decl) = ref;
1106 TREE_PUBLIC (decl) = 0;
1107 TREE_STATIC (decl) = 0;
1108 DECL_EXTERNAL (decl) = 1;
1109 decl = pushdecl (decl);
1111 else if (ANON_AGGR_TYPE_P (TREE_TYPE (field)))
1112 decl = build_anon_union_vars (TREE_TYPE (field), ref);
1116 if (main_decl == NULL_TREE)
1123 /* Finish off the processing of a UNION_TYPE structure. If the union is an
1124 anonymous union, then all members must be laid out together. PUBLIC_P
1125 is nonzero if this union is not declared static. */
1128 finish_anon_union (tree anon_union_decl)
1134 if (anon_union_decl == error_mark_node)
1137 type = TREE_TYPE (anon_union_decl);
1138 public_p = TREE_PUBLIC (anon_union_decl);
1140 /* The VAR_DECL's context is the same as the TYPE's context. */
1141 DECL_CONTEXT (anon_union_decl) = DECL_CONTEXT (TYPE_NAME (type));
1143 if (TYPE_FIELDS (type) == NULL_TREE)
1148 error ("namespace-scope anonymous aggregates must be static");
1152 main_decl = build_anon_union_vars (type, anon_union_decl);
1153 if (main_decl == NULL_TREE)
1155 warning (0, "anonymous union with no members");
1159 if (!processing_template_decl)
1161 /* Use main_decl to set the mangled name. */
1162 DECL_NAME (anon_union_decl) = DECL_NAME (main_decl);
1163 mangle_decl (anon_union_decl);
1164 DECL_NAME (anon_union_decl) = NULL_TREE;
1167 pushdecl (anon_union_decl);
1168 if (building_stmt_tree ()
1169 && at_function_scope_p ())
1170 add_decl_expr (anon_union_decl);
1171 else if (!processing_template_decl)
1172 rest_of_decl_compilation (anon_union_decl,
1173 toplevel_bindings_p (), at_eof);
1176 /* Auxiliary functions to make type signatures for
1177 `operator new' and `operator delete' correspond to
1178 what compiler will be expecting. */
1181 coerce_new_type (tree type)
1184 tree args = TYPE_ARG_TYPES (type);
1186 gcc_assert (TREE_CODE (type) == FUNCTION_TYPE);
1188 if (!same_type_p (TREE_TYPE (type), ptr_type_node))
1191 error ("%<operator new%> must return type %qT", ptr_type_node);
1194 if (!args || args == void_list_node
1195 || !same_type_p (TREE_VALUE (args), size_type_node))
1198 if (args && args != void_list_node)
1199 args = TREE_CHAIN (args);
1200 pedwarn ("%<operator new%> takes type %<size_t%> (%qT) "
1201 "as first parameter", size_type_node);
1206 args = tree_cons (NULL_TREE, size_type_node, args);
1209 type = build_exception_variant
1210 (build_function_type (ptr_type_node, args),
1211 TYPE_RAISES_EXCEPTIONS (type));
1219 coerce_delete_type (tree type)
1222 tree args = TYPE_ARG_TYPES (type);
1224 gcc_assert (TREE_CODE (type) == FUNCTION_TYPE);
1226 if (!same_type_p (TREE_TYPE (type), void_type_node))
1229 error ("%<operator delete%> must return type %qT", void_type_node);
1232 if (!args || args == void_list_node
1233 || !same_type_p (TREE_VALUE (args), ptr_type_node))
1236 if (args && args != void_list_node)
1237 args = TREE_CHAIN (args);
1238 error ("%<operator delete%> takes type %qT as first parameter",
1244 args = tree_cons (NULL_TREE, ptr_type_node, args);
1247 type = build_exception_variant
1248 (build_function_type (void_type_node, args),
1249 TYPE_RAISES_EXCEPTIONS (type));
1258 mark_vtable_entries (tree decl)
1261 unsigned HOST_WIDE_INT idx;
1263 FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (DECL_INITIAL (decl)),
1268 STRIP_NOPS (fnaddr);
1270 if (TREE_CODE (fnaddr) != ADDR_EXPR
1271 && TREE_CODE (fnaddr) != FDESC_EXPR)
1272 /* This entry is an offset: a virtual base class offset, a
1273 virtual call offset, an RTTI offset, etc. */
1276 fn = TREE_OPERAND (fnaddr, 0);
1277 TREE_ADDRESSABLE (fn) = 1;
1278 /* When we don't have vcall offsets, we output thunks whenever
1279 we output the vtables that contain them. With vcall offsets,
1280 we know all the thunks we'll need when we emit a virtual
1281 function, so we emit the thunks there instead. */
1282 if (DECL_THUNK_P (fn))
1283 use_thunk (fn, /*emit_p=*/0);
1288 /* Set DECL up to have the closest approximation of "initialized common"
1289 linkage available. */
1292 comdat_linkage (tree decl)
1295 make_decl_one_only (decl);
1296 else if (TREE_CODE (decl) == FUNCTION_DECL
1297 || (TREE_CODE (decl) == VAR_DECL && DECL_ARTIFICIAL (decl)))
1298 /* We can just emit function and compiler-generated variables
1299 statically; having multiple copies is (for the most part) only
1302 There are two correctness issues, however: the address of a
1303 template instantiation with external linkage should be the
1304 same, independent of what translation unit asks for the
1305 address, and this will not hold when we emit multiple copies of
1306 the function. However, there's little else we can do.
1308 Also, by default, the typeinfo implementation assumes that
1309 there will be only one copy of the string used as the name for
1310 each type. Therefore, if weak symbols are unavailable, the
1311 run-time library should perform a more conservative check; it
1312 should perform a string comparison, rather than an address
1314 TREE_PUBLIC (decl) = 0;
1317 /* Static data member template instantiations, however, cannot
1318 have multiple copies. */
1319 if (DECL_INITIAL (decl) == 0
1320 || DECL_INITIAL (decl) == error_mark_node)
1321 DECL_COMMON (decl) = 1;
1322 else if (EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl)))
1324 DECL_COMMON (decl) = 1;
1325 DECL_INITIAL (decl) = error_mark_node;
1327 else if (!DECL_EXPLICIT_INSTANTIATION (decl))
1329 /* We can't do anything useful; leave vars for explicit
1331 DECL_EXTERNAL (decl) = 1;
1332 DECL_NOT_REALLY_EXTERN (decl) = 0;
1336 if (DECL_LANG_SPECIFIC (decl))
1337 DECL_COMDAT (decl) = 1;
1340 /* For win32 we also want to put explicit instantiations in
1341 linkonce sections, so that they will be merged with implicit
1342 instantiations; otherwise we get duplicate symbol errors.
1343 For Darwin we do not want explicit instantiations to be
1347 maybe_make_one_only (tree decl)
1349 /* We used to say that this was not necessary on targets that support weak
1350 symbols, because the implicit instantiations will defer to the explicit
1351 one. However, that's not actually the case in SVR4; a strong definition
1352 after a weak one is an error. Also, not making explicit
1353 instantiations one_only means that we can end up with two copies of
1354 some template instantiations. */
1358 /* We can't set DECL_COMDAT on functions, or cp_finish_file will think
1359 we can get away with not emitting them if they aren't used. We need
1360 to for variables so that cp_finish_decl will update their linkage,
1361 because their DECL_INITIAL may not have been set properly yet. */
1363 if (!TARGET_WEAK_NOT_IN_ARCHIVE_TOC
1364 || (! DECL_EXPLICIT_INSTANTIATION (decl)
1365 && ! DECL_TEMPLATE_SPECIALIZATION (decl)))
1367 make_decl_one_only (decl);
1369 if (TREE_CODE (decl) == VAR_DECL)
1371 DECL_COMDAT (decl) = 1;
1372 /* Mark it needed so we don't forget to emit it. */
1373 mark_decl_referenced (decl);
1378 /* Determine whether or not we want to specifically import or export CTYPE,
1379 using various heuristics. */
1382 import_export_class (tree ctype)
1384 /* -1 for imported, 1 for exported. */
1385 int import_export = 0;
1387 /* It only makes sense to call this function at EOF. The reason is
1388 that this function looks at whether or not the first non-inline
1389 non-abstract virtual member function has been defined in this
1390 translation unit. But, we can't possibly know that until we've
1391 seen the entire translation unit. */
1392 gcc_assert (at_eof);
1394 if (CLASSTYPE_INTERFACE_KNOWN (ctype))
1397 /* If MULTIPLE_SYMBOL_SPACES is set and we saw a #pragma interface,
1398 we will have CLASSTYPE_INTERFACE_ONLY set but not
1399 CLASSTYPE_INTERFACE_KNOWN. In that case, we don't want to use this
1400 heuristic because someone will supply a #pragma implementation
1401 elsewhere, and deducing it here would produce a conflict. */
1402 if (CLASSTYPE_INTERFACE_ONLY (ctype))
1405 if (lookup_attribute ("dllimport", TYPE_ATTRIBUTES (ctype)))
1407 else if (lookup_attribute ("dllexport", TYPE_ATTRIBUTES (ctype)))
1409 else if (CLASSTYPE_IMPLICIT_INSTANTIATION (ctype)
1410 && !flag_implicit_templates)
1411 /* For a template class, without -fimplicit-templates, check the
1412 repository. If the virtual table is assigned to this
1413 translation unit, then export the class; otherwise, import
1415 import_export = repo_export_class_p (ctype) ? 1 : -1;
1416 else if (TYPE_POLYMORPHIC_P (ctype))
1418 /* The ABI specifies that the virtual table and associated
1419 information are emitted with the key method, if any. */
1420 tree method = CLASSTYPE_KEY_METHOD (ctype);
1421 /* If weak symbol support is not available, then we must be
1422 careful not to emit the vtable when the key function is
1423 inline. An inline function can be defined in multiple
1424 translation units. If we were to emit the vtable in each
1425 translation unit containing a definition, we would get
1426 multiple definition errors at link-time. */
1427 if (method && (flag_weak || ! DECL_DECLARED_INLINE_P (method)))
1428 import_export = (DECL_REALLY_EXTERN (method) ? -1 : 1);
1431 /* When MULTIPLE_SYMBOL_SPACES is set, we cannot count on seeing
1432 a definition anywhere else. */
1433 if (MULTIPLE_SYMBOL_SPACES && import_export == -1)
1436 /* Allow backends the chance to overrule the decision. */
1437 if (targetm.cxx.import_export_class)
1438 import_export = targetm.cxx.import_export_class (ctype, import_export);
1442 SET_CLASSTYPE_INTERFACE_KNOWN (ctype);
1443 CLASSTYPE_INTERFACE_ONLY (ctype) = (import_export < 0);
1447 /* Return true if VAR has already been provided to the back end; in that
1448 case VAR should not be modified further by the front end. */
1450 var_finalized_p (tree var)
1452 return cgraph_varpool_node (var)->finalized;
1455 /* DECL is a VAR_DECL or FUNCTION_DECL which, for whatever reason,
1456 must be emitted in this translation unit. Mark it as such. */
1459 mark_needed (tree decl)
1461 /* It's possible that we no longer need to set
1462 TREE_SYMBOL_REFERENCED here directly, but doing so is
1464 TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl)) = 1;
1465 mark_decl_referenced (decl);
1468 /* DECL is either a FUNCTION_DECL or a VAR_DECL. This function
1469 returns true if a definition of this entity should be provided in
1470 this object file. Callers use this function to determine whether
1471 or not to let the back end know that a definition of DECL is
1472 available in this translation unit. */
1475 decl_needed_p (tree decl)
1477 gcc_assert (TREE_CODE (decl) == VAR_DECL
1478 || TREE_CODE (decl) == FUNCTION_DECL);
1479 /* This function should only be called at the end of the translation
1480 unit. We cannot be sure of whether or not something will be
1481 COMDAT until that point. */
1482 gcc_assert (at_eof);
1484 /* All entities with external linkage that are not COMDAT should be
1485 emitted; they may be referred to from other object files. */
1486 if (TREE_PUBLIC (decl) && !DECL_COMDAT (decl))
1488 /* If this entity was used, let the back-end see it; it will decide
1489 whether or not to emit it into the object file. */
1490 if (TREE_USED (decl)
1491 || (DECL_ASSEMBLER_NAME_SET_P (decl)
1492 && TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl))))
1494 /* Otherwise, DECL does not need to be emitted -- yet. A subsequent
1495 reference to DECL might cause it to be emitted later. */
1499 /* If necessary, write out the vtables for the dynamic class CTYPE.
1500 Returns true if any vtables were emitted. */
1503 maybe_emit_vtables (tree ctype)
1509 /* If the vtables for this class have already been emitted there is
1510 nothing more to do. */
1511 primary_vtbl = CLASSTYPE_VTABLES (ctype);
1512 if (var_finalized_p (primary_vtbl))
1514 /* Ignore dummy vtables made by get_vtable_decl. */
1515 if (TREE_TYPE (primary_vtbl) == void_type_node)
1518 /* On some targets, we cannot determine the key method until the end
1519 of the translation unit -- which is when this function is
1521 if (!targetm.cxx.key_method_may_be_inline ())
1522 determine_key_method (ctype);
1524 /* See if any of the vtables are needed. */
1525 for (vtbl = CLASSTYPE_VTABLES (ctype); vtbl; vtbl = TREE_CHAIN (vtbl))
1527 import_export_decl (vtbl);
1528 if (DECL_NOT_REALLY_EXTERN (vtbl) && decl_needed_p (vtbl))
1533 /* If the references to this class' vtables are optimized away,
1534 still emit the appropriate debugging information. See
1536 if (DECL_COMDAT (primary_vtbl)
1537 && CLASSTYPE_DEBUG_REQUESTED (ctype))
1538 note_debug_info_needed (ctype);
1542 /* The ABI requires that we emit all of the vtables if we emit any
1544 for (vtbl = CLASSTYPE_VTABLES (ctype); vtbl; vtbl = TREE_CHAIN (vtbl))
1546 /* Mark entities references from the virtual table as used. */
1547 mark_vtable_entries (vtbl);
1549 if (TREE_TYPE (DECL_INITIAL (vtbl)) == 0)
1551 tree expr = store_init_value (vtbl, DECL_INITIAL (vtbl));
1553 /* It had better be all done at compile-time. */
1558 DECL_EXTERNAL (vtbl) = 0;
1559 rest_of_decl_compilation (vtbl, 1, 1);
1561 /* Because we're only doing syntax-checking, we'll never end up
1562 actually marking the variable as written. */
1563 if (flag_syntax_only)
1564 TREE_ASM_WRITTEN (vtbl) = 1;
1567 /* Since we're writing out the vtable here, also write the debug
1569 note_debug_info_needed (ctype);
1574 /* Like c_determine_visibility, but with additional C++-specific
1578 determine_visibility (tree decl)
1582 /* Cloned constructors and destructors get the same visibility as
1583 the underlying function. That should be set up in
1584 maybe_clone_body. */
1585 gcc_assert (!DECL_CLONED_FUNCTION_P (decl));
1587 /* Give the common code a chance to make a determination. */
1588 if (c_determine_visibility (decl))
1591 /* If DECL is a member of a class, visibility specifiers on the
1592 class can influence the visibility of the DECL. */
1593 if (DECL_CLASS_SCOPE_P (decl))
1594 class_type = DECL_CONTEXT (decl);
1595 else if (TREE_CODE (decl) == VAR_DECL
1596 && DECL_TINFO_P (decl)
1597 && CLASS_TYPE_P (TREE_TYPE (DECL_NAME (decl))))
1598 class_type = TREE_TYPE (DECL_NAME (decl));
1601 /* Virtual tables have DECL_CONTEXT set to their associated class,
1602 so they are automatically handled above. */
1603 gcc_assert (TREE_CODE (decl) != VAR_DECL
1604 || !DECL_VTABLE_OR_VTT_P (decl));
1605 /* Entities not associated with any class just get the
1606 visibility specified by their attributes. */
1610 /* By default, static data members and function members receive
1611 the visibility of their containing class. */
1614 if (TARGET_DLLIMPORT_DECL_ATTRIBUTES
1615 && lookup_attribute ("dllexport", TYPE_ATTRIBUTES (class_type)))
1617 DECL_VISIBILITY (decl) = VISIBILITY_DEFAULT;
1618 DECL_VISIBILITY_SPECIFIED (decl) = 1;
1620 else if (TREE_CODE (decl) == FUNCTION_DECL
1621 && DECL_DECLARED_INLINE_P (decl)
1622 && visibility_options.inlines_hidden)
1624 /* Don't change it if it has been set explicitly by user. */
1625 if (!DECL_VISIBILITY_SPECIFIED (decl))
1627 DECL_VISIBILITY (decl) = VISIBILITY_HIDDEN;
1628 DECL_VISIBILITY_SPECIFIED (decl) = 1;
1631 else if (CLASSTYPE_VISIBILITY_SPECIFIED (class_type))
1633 DECL_VISIBILITY (decl) = CLASSTYPE_VISIBILITY (class_type);
1634 DECL_VISIBILITY_SPECIFIED (decl) = 1;
1636 else if (!DECL_VISIBILITY_SPECIFIED (decl))
1638 DECL_VISIBILITY (decl) = CLASSTYPE_VISIBILITY (class_type);
1639 DECL_VISIBILITY_SPECIFIED (decl) = 0;
1644 /* DECL is a FUNCTION_DECL or VAR_DECL. If the object file linkage
1645 for DECL has not already been determined, do so now by setting
1646 DECL_EXTERNAL, DECL_COMDAT and other related flags. Until this
1647 function is called entities with vague linkage whose definitions
1648 are available must have TREE_PUBLIC set.
1650 If this function decides to place DECL in COMDAT, it will set
1651 appropriate flags -- but will not clear DECL_EXTERNAL. It is up to
1652 the caller to decide whether or not to clear DECL_EXTERNAL. Some
1653 callers defer that decision until it is clear that DECL is actually
1657 import_export_decl (tree decl)
1662 tree class_type = NULL_TREE;
1664 if (DECL_INTERFACE_KNOWN (decl))
1667 /* We cannot determine what linkage to give to an entity with vague
1668 linkage until the end of the file. For example, a virtual table
1669 for a class will be defined if and only if the key method is
1670 defined in this translation unit. As a further example, consider
1671 that when compiling a translation unit that uses PCH file with
1672 "-frepo" it would be incorrect to make decisions about what
1673 entities to emit when building the PCH; those decisions must be
1674 delayed until the repository information has been processed. */
1675 gcc_assert (at_eof);
1676 /* Object file linkage for explicit instantiations is handled in
1677 mark_decl_instantiated. For static variables in functions with
1678 vague linkage, maybe_commonize_var is used.
1680 Therefore, the only declarations that should be provided to this
1681 function are those with external linkage that are:
1683 * implicit instantiations of function templates
1687 * implicit instantiations of static data members of class
1694 Furthermore, all entities that reach this point must have a
1695 definition available in this translation unit.
1697 The following assertions check these conditions. */
1698 gcc_assert (TREE_CODE (decl) == FUNCTION_DECL
1699 || TREE_CODE (decl) == VAR_DECL);
1700 /* Any code that creates entities with TREE_PUBLIC cleared should
1701 also set DECL_INTERFACE_KNOWN. */
1702 gcc_assert (TREE_PUBLIC (decl));
1703 if (TREE_CODE (decl) == FUNCTION_DECL)
1704 gcc_assert (DECL_IMPLICIT_INSTANTIATION (decl)
1705 || DECL_FRIEND_PSEUDO_TEMPLATE_INSTANTIATION (decl)
1706 || DECL_DECLARED_INLINE_P (decl));
1708 gcc_assert (DECL_IMPLICIT_INSTANTIATION (decl)
1709 || DECL_VTABLE_OR_VTT_P (decl)
1710 || DECL_TINFO_P (decl));
1711 /* Check that a definition of DECL is available in this translation
1713 gcc_assert (!DECL_REALLY_EXTERN (decl));
1715 /* Assume that DECL will not have COMDAT linkage. */
1717 /* Assume that DECL will not be imported into this translation
1721 /* See if the repository tells us whether or not to emit DECL in
1722 this translation unit. */
1723 emit_p = repo_emit_p (decl);
1726 else if (emit_p == 1)
1728 /* The repository indicates that this entity should be defined
1729 here. Make sure the back end honors that request. */
1730 if (TREE_CODE (decl) == VAR_DECL)
1732 else if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl)
1733 || DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P (decl))
1736 FOR_EACH_CLONE (clone, decl)
1737 mark_needed (clone);
1741 /* Output the definition as an ordinary strong definition. */
1742 DECL_EXTERNAL (decl) = 0;
1743 DECL_INTERFACE_KNOWN (decl) = 1;
1748 /* We have already decided what to do with this DECL; there is no
1749 need to check anything further. */
1751 else if (TREE_CODE (decl) == VAR_DECL && DECL_VTABLE_OR_VTT_P (decl))
1753 class_type = DECL_CONTEXT (decl);
1754 import_export_class (class_type);
1755 if (TYPE_FOR_JAVA (class_type))
1757 else if (CLASSTYPE_INTERFACE_KNOWN (class_type)
1758 && CLASSTYPE_INTERFACE_ONLY (class_type))
1760 else if ((!flag_weak || TARGET_WEAK_NOT_IN_ARCHIVE_TOC)
1761 && !CLASSTYPE_USE_TEMPLATE (class_type)
1762 && CLASSTYPE_KEY_METHOD (class_type)
1763 && !DECL_DECLARED_INLINE_P (CLASSTYPE_KEY_METHOD (class_type)))
1764 /* The ABI requires that all virtual tables be emitted with
1765 COMDAT linkage. However, on systems where COMDAT symbols
1766 don't show up in the table of contents for a static
1767 archive, or on systems without weak symbols (where we
1768 approximate COMDAT linkage by using internal linkage), the
1769 linker will report errors about undefined symbols because
1770 it will not see the virtual table definition. Therefore,
1771 in the case that we know that the virtual table will be
1772 emitted in only one translation unit, we make the virtual
1773 table an ordinary definition with external linkage. */
1774 DECL_EXTERNAL (decl) = 0;
1775 else if (CLASSTYPE_INTERFACE_KNOWN (class_type))
1777 /* CLASS_TYPE is being exported from this translation unit,
1778 so DECL should be defined here. */
1779 if (!flag_weak && CLASSTYPE_EXPLICIT_INSTANTIATION (class_type))
1780 /* If a class is declared in a header with the "extern
1781 template" extension, then it will not be instantiated,
1782 even in translation units that would normally require
1783 it. Often such classes are explicitly instantiated in
1784 one translation unit. Therefore, the explicit
1785 instantiation must be made visible to other translation
1787 DECL_EXTERNAL (decl) = 0;
1790 /* The generic C++ ABI says that class data is always
1791 COMDAT, even if there is a key function. Some
1792 variants (e.g., the ARM EABI) says that class data
1793 only has COMDAT linkage if the class data might
1794 be emitted in more than one translation unit. */
1795 if (!CLASSTYPE_KEY_METHOD (class_type)
1796 || targetm.cxx.class_data_always_comdat ())
1798 /* The ABI requires COMDAT linkage. Normally, we
1799 only emit COMDAT things when they are needed;
1800 make sure that we realize that this entity is
1807 else if (!flag_implicit_templates
1808 && CLASSTYPE_IMPLICIT_INSTANTIATION (class_type))
1813 else if (TREE_CODE (decl) == VAR_DECL && DECL_TINFO_P (decl))
1815 tree type = TREE_TYPE (DECL_NAME (decl));
1816 if (CLASS_TYPE_P (type))
1819 import_export_class (type);
1820 if (CLASSTYPE_INTERFACE_KNOWN (type)
1821 && TYPE_POLYMORPHIC_P (type)
1822 && CLASSTYPE_INTERFACE_ONLY (type)
1823 /* If -fno-rtti was specified, then we cannot be sure
1824 that RTTI information will be emitted with the
1825 virtual table of the class, so we must emit it
1826 wherever it is used. */
1831 if (CLASSTYPE_INTERFACE_KNOWN (type)
1832 && !CLASSTYPE_INTERFACE_ONLY (type))
1834 comdat_p = targetm.cxx.class_data_always_comdat ();
1839 DECL_EXTERNAL (decl) = 0;
1849 else if (DECL_TEMPLATE_INSTANTIATION (decl)
1850 || DECL_FRIEND_PSEUDO_TEMPLATE_INSTANTIATION (decl))
1852 /* DECL is an implicit instantiation of a function or static
1854 if (flag_implicit_templates
1855 || (flag_implicit_inline_templates
1856 && TREE_CODE (decl) == FUNCTION_DECL
1857 && DECL_DECLARED_INLINE_P (decl)))
1860 /* If we are not implicitly generating templates, then mark
1861 this entity as undefined in this translation unit. */
1864 else if (DECL_FUNCTION_MEMBER_P (decl))
1866 if (!DECL_DECLARED_INLINE_P (decl))
1868 tree ctype = DECL_CONTEXT (decl);
1869 import_export_class (ctype);
1870 if (CLASSTYPE_INTERFACE_KNOWN (ctype))
1872 DECL_NOT_REALLY_EXTERN (decl)
1873 = ! (CLASSTYPE_INTERFACE_ONLY (ctype)
1874 || (DECL_DECLARED_INLINE_P (decl)
1875 && ! flag_implement_inlines
1876 && !DECL_VINDEX (decl)));
1878 if (!DECL_NOT_REALLY_EXTERN (decl))
1879 DECL_EXTERNAL (decl) = 1;
1881 /* Always make artificials weak. */
1882 if (DECL_ARTIFICIAL (decl) && flag_weak)
1885 maybe_make_one_only (decl);
1896 /* If we are importing DECL into this translation unit, mark is
1897 an undefined here. */
1898 DECL_EXTERNAL (decl) = 1;
1899 DECL_NOT_REALLY_EXTERN (decl) = 0;
1903 /* If we decided to put DECL in COMDAT, mark it accordingly at
1905 comdat_linkage (decl);
1908 /* Give the target a chance to override the visibility associated
1910 if (TREE_CODE (decl) == VAR_DECL
1911 && (DECL_TINFO_P (decl)
1912 || (DECL_VTABLE_OR_VTT_P (decl)
1913 /* Construction virtual tables are not exported because
1914 they cannot be referred to from other object files;
1915 their name is not standardized by the ABI. */
1916 && !DECL_CONSTRUCTION_VTABLE_P (decl)))
1917 && TREE_PUBLIC (decl)
1918 && !DECL_REALLY_EXTERN (decl)
1919 && DECL_VISIBILITY_SPECIFIED (decl)
1920 && (!class_type || !CLASSTYPE_VISIBILITY_SPECIFIED (class_type)))
1921 targetm.cxx.determine_class_data_visibility (decl);
1923 DECL_INTERFACE_KNOWN (decl) = 1;
1926 /* Return an expression that performs the destruction of DECL, which
1927 must be a VAR_DECL whose type has a non-trivial destructor, or is
1928 an array whose (innermost) elements have a non-trivial destructor. */
1931 build_cleanup (tree decl)
1934 tree type = TREE_TYPE (decl);
1936 /* This function should only be called for declarations that really
1937 require cleanups. */
1938 gcc_assert (!TYPE_HAS_TRIVIAL_DESTRUCTOR (type));
1940 /* Treat all objects with destructors as used; the destructor may do
1941 something substantive. */
1944 if (TREE_CODE (type) == ARRAY_TYPE)
1948 cxx_mark_addressable (decl);
1949 temp = build1 (ADDR_EXPR, build_pointer_type (type), decl);
1951 temp = build_delete (TREE_TYPE (temp), temp,
1952 sfk_complete_destructor,
1953 LOOKUP_NORMAL|LOOKUP_NONVIRTUAL|LOOKUP_DESTRUCTOR, 0);
1957 /* Returns the initialization guard variable for the variable DECL,
1958 which has static storage duration. */
1961 get_guard (tree decl)
1966 sname = mangle_guard_variable (decl);
1967 guard = IDENTIFIER_GLOBAL_VALUE (sname);
1972 /* We use a type that is big enough to contain a mutex as well
1973 as an integer counter. */
1974 guard_type = targetm.cxx.guard_type ();
1975 guard = build_decl (VAR_DECL, sname, guard_type);
1977 /* The guard should have the same linkage as what it guards. */
1978 TREE_PUBLIC (guard) = TREE_PUBLIC (decl);
1979 TREE_STATIC (guard) = TREE_STATIC (decl);
1980 DECL_COMMON (guard) = DECL_COMMON (decl);
1981 DECL_ONE_ONLY (guard) = DECL_ONE_ONLY (decl);
1982 if (TREE_PUBLIC (decl))
1983 DECL_WEAK (guard) = DECL_WEAK (decl);
1985 DECL_ARTIFICIAL (guard) = 1;
1986 DECL_IGNORED_P (guard) = 1;
1987 TREE_USED (guard) = 1;
1988 pushdecl_top_level_and_finish (guard, NULL_TREE);
1993 /* Return those bits of the GUARD variable that should be set when the
1994 guarded entity is actually initialized. */
1997 get_guard_bits (tree guard)
1999 if (!targetm.cxx.guard_mask_bit ())
2001 /* We only set the first byte of the guard, in order to leave room
2002 for a mutex in the high-order bits. */
2003 guard = build1 (ADDR_EXPR,
2004 build_pointer_type (TREE_TYPE (guard)),
2006 guard = build1 (NOP_EXPR,
2007 build_pointer_type (char_type_node),
2009 guard = build1 (INDIRECT_REF, char_type_node, guard);
2015 /* Return an expression which determines whether or not the GUARD
2016 variable has already been initialized. */
2019 get_guard_cond (tree guard)
2023 /* Check to see if the GUARD is zero. */
2024 guard = get_guard_bits (guard);
2026 /* Mask off all but the low bit. */
2027 if (targetm.cxx.guard_mask_bit ())
2029 guard_value = integer_one_node;
2030 if (!same_type_p (TREE_TYPE (guard_value), TREE_TYPE (guard)))
2031 guard_value = convert (TREE_TYPE (guard), guard_value);
2032 guard = cp_build_binary_op (BIT_AND_EXPR, guard, guard_value);
2035 guard_value = integer_zero_node;
2036 if (!same_type_p (TREE_TYPE (guard_value), TREE_TYPE (guard)))
2037 guard_value = convert (TREE_TYPE (guard), guard_value);
2038 return cp_build_binary_op (EQ_EXPR, guard, guard_value);
2041 /* Return an expression which sets the GUARD variable, indicating that
2042 the variable being guarded has been initialized. */
2045 set_guard (tree guard)
2049 /* Set the GUARD to one. */
2050 guard = get_guard_bits (guard);
2051 guard_init = integer_one_node;
2052 if (!same_type_p (TREE_TYPE (guard_init), TREE_TYPE (guard)))
2053 guard_init = convert (TREE_TYPE (guard), guard_init);
2054 return build_modify_expr (guard, NOP_EXPR, guard_init);
2057 /* Start the process of running a particular set of global constructors
2058 or destructors. Subroutine of do_[cd]tors. */
2061 start_objects (int method_type, int initp)
2067 /* Make ctor or dtor function. METHOD_TYPE may be 'I' or 'D'. */
2069 if (initp != DEFAULT_INIT_PRIORITY)
2079 sprintf (type, "%c%c%.5u", method_type, joiner, initp);
2082 sprintf (type, "%c", method_type);
2084 fndecl = build_lang_decl (FUNCTION_DECL,
2085 get_file_function_name_long (type),
2086 build_function_type (void_type_node,
2088 start_preparsed_function (fndecl, /*attrs=*/NULL_TREE, SF_PRE_PARSED);
2090 /* It can be a static function as long as collect2 does not have
2091 to scan the object file to find its ctor/dtor routine. */
2092 TREE_PUBLIC (current_function_decl) = ! targetm.have_ctors_dtors;
2094 /* Mark this declaration as used to avoid spurious warnings. */
2095 TREE_USED (current_function_decl) = 1;
2097 /* Mark this function as a global constructor or destructor. */
2098 if (method_type == 'I')
2099 DECL_GLOBAL_CTOR_P (current_function_decl) = 1;
2101 DECL_GLOBAL_DTOR_P (current_function_decl) = 1;
2102 DECL_LANG_SPECIFIC (current_function_decl)->decl_flags.u2sel = 1;
2104 body = begin_compound_stmt (BCS_FN_BODY);
2106 /* We cannot allow these functions to be elided, even if they do not
2107 have external linkage. And, there's no point in deferring
2108 compilation of thes functions; they're all going to have to be
2110 DECL_INLINE (current_function_decl) = 0;
2111 DECL_UNINLINABLE (current_function_decl) = 1;
2116 /* Finish the process of running a particular set of global constructors
2117 or destructors. Subroutine of do_[cd]tors. */
2120 finish_objects (int method_type, int initp, tree body)
2125 finish_compound_stmt (body);
2126 fn = finish_function (0);
2127 expand_or_defer_fn (fn);
2129 /* When only doing semantic analysis, and no RTL generation, we
2130 can't call functions that directly emit assembly code; there is
2131 no assembly file in which to put the code. */
2132 if (flag_syntax_only)
2135 if (targetm.have_ctors_dtors)
2137 rtx fnsym = XEXP (DECL_RTL (fn), 0);
2138 cgraph_mark_needed_node (cgraph_node (fn));
2139 if (method_type == 'I')
2140 (* targetm.asm_out.constructor) (fnsym, initp);
2142 (* targetm.asm_out.destructor) (fnsym, initp);
2146 /* The names of the parameters to the function created to handle
2147 initializations and destructions for objects with static storage
2149 #define INITIALIZE_P_IDENTIFIER "__initialize_p"
2150 #define PRIORITY_IDENTIFIER "__priority"
2152 /* The name of the function we create to handle initializations and
2153 destructions for objects with static storage duration. */
2154 #define SSDF_IDENTIFIER "__static_initialization_and_destruction"
2156 /* The declaration for the __INITIALIZE_P argument. */
2157 static GTY(()) tree initialize_p_decl;
2159 /* The declaration for the __PRIORITY argument. */
2160 static GTY(()) tree priority_decl;
2162 /* The declaration for the static storage duration function. */
2163 static GTY(()) tree ssdf_decl;
2165 /* All the static storage duration functions created in this
2166 translation unit. */
2167 static GTY(()) VEC(tree,gc) *ssdf_decls;
2169 /* A map from priority levels to information about that priority
2170 level. There may be many such levels, so efficient lookup is
2172 static splay_tree priority_info_map;
2174 /* Begins the generation of the function that will handle all
2175 initialization and destruction of objects with static storage
2176 duration. The function generated takes two parameters of type
2177 `int': __INITIALIZE_P and __PRIORITY. If __INITIALIZE_P is
2178 nonzero, it performs initializations. Otherwise, it performs
2179 destructions. It only performs those initializations or
2180 destructions with the indicated __PRIORITY. The generated function
2183 It is assumed that this function will only be called once per
2184 translation unit. */
2187 start_static_storage_duration_function (unsigned count)
2192 char id[sizeof (SSDF_IDENTIFIER) + 1 /* '\0' */ + 32];
2194 /* Create the identifier for this function. It will be of the form
2195 SSDF_IDENTIFIER_<number>. */
2196 sprintf (id, "%s_%u", SSDF_IDENTIFIER, count);
2198 /* Create the parameters. */
2199 parm_types = void_list_node;
2200 parm_types = tree_cons (NULL_TREE, integer_type_node, parm_types);
2201 parm_types = tree_cons (NULL_TREE, integer_type_node, parm_types);
2202 type = build_function_type (void_type_node, parm_types);
2204 /* Create the FUNCTION_DECL itself. */
2205 ssdf_decl = build_lang_decl (FUNCTION_DECL,
2206 get_identifier (id),
2208 TREE_PUBLIC (ssdf_decl) = 0;
2209 DECL_ARTIFICIAL (ssdf_decl) = 1;
2211 /* Put this function in the list of functions to be called from the
2212 static constructors and destructors. */
2215 ssdf_decls = VEC_alloc (tree, gc, 32);
2217 /* Take this opportunity to initialize the map from priority
2218 numbers to information about that priority level. */
2219 priority_info_map = splay_tree_new (splay_tree_compare_ints,
2220 /*delete_key_fn=*/0,
2221 /*delete_value_fn=*/
2222 (splay_tree_delete_value_fn) &free);
2224 /* We always need to generate functions for the
2225 DEFAULT_INIT_PRIORITY so enter it now. That way when we walk
2226 priorities later, we'll be sure to find the
2227 DEFAULT_INIT_PRIORITY. */
2228 get_priority_info (DEFAULT_INIT_PRIORITY);
2231 VEC_safe_push (tree, gc, ssdf_decls, ssdf_decl);
2233 /* Create the argument list. */
2234 initialize_p_decl = cp_build_parm_decl
2235 (get_identifier (INITIALIZE_P_IDENTIFIER), integer_type_node);
2236 DECL_CONTEXT (initialize_p_decl) = ssdf_decl;
2237 TREE_USED (initialize_p_decl) = 1;
2238 priority_decl = cp_build_parm_decl
2239 (get_identifier (PRIORITY_IDENTIFIER), integer_type_node);
2240 DECL_CONTEXT (priority_decl) = ssdf_decl;
2241 TREE_USED (priority_decl) = 1;
2243 TREE_CHAIN (initialize_p_decl) = priority_decl;
2244 DECL_ARGUMENTS (ssdf_decl) = initialize_p_decl;
2246 /* Put the function in the global scope. */
2247 pushdecl (ssdf_decl);
2249 /* Start the function itself. This is equivalent to declaring the
2252 static void __ssdf (int __initialize_p, init __priority_p);
2254 It is static because we only need to call this function from the
2255 various constructor and destructor functions for this module. */
2256 start_preparsed_function (ssdf_decl,
2257 /*attrs=*/NULL_TREE,
2260 /* Set up the scope of the outermost block in the function. */
2261 body = begin_compound_stmt (BCS_FN_BODY);
2263 /* This function must not be deferred because we are depending on
2264 its compilation to tell us what is TREE_SYMBOL_REFERENCED. */
2265 DECL_INLINE (ssdf_decl) = 0;
2266 DECL_UNINLINABLE (ssdf_decl) = 1;
2271 /* Finish the generation of the function which performs initialization
2272 and destruction of objects with static storage duration. After
2273 this point, no more such objects can be created. */
2276 finish_static_storage_duration_function (tree body)
2278 /* Close out the function. */
2279 finish_compound_stmt (body);
2280 expand_or_defer_fn (finish_function (0));
2283 /* Return the information about the indicated PRIORITY level. If no
2284 code to handle this level has yet been generated, generate the
2285 appropriate prologue. */
2287 static priority_info
2288 get_priority_info (int priority)
2293 n = splay_tree_lookup (priority_info_map,
2294 (splay_tree_key) priority);
2297 /* Create a new priority information structure, and insert it
2299 pi = xmalloc (sizeof (struct priority_info_s));
2300 pi->initializations_p = 0;
2301 pi->destructions_p = 0;
2302 splay_tree_insert (priority_info_map,
2303 (splay_tree_key) priority,
2304 (splay_tree_value) pi);
2307 pi = (priority_info) n->value;
2312 /* Set up to handle the initialization or destruction of DECL. If
2313 INITP is nonzero, we are initializing the variable. Otherwise, we
2314 are destroying it. */
2317 start_static_initialization_or_destruction (tree decl, int initp)
2319 tree guard_if_stmt = NULL_TREE;
2326 /* Figure out the priority for this declaration. */
2327 if (DECL_HAS_INIT_PRIORITY_P (decl))
2328 priority = DECL_INIT_PRIORITY (decl);
2330 priority = DEFAULT_INIT_PRIORITY;
2332 /* Remember that we had an initialization or finalization at this
2334 pi = get_priority_info (priority);
2336 pi->initializations_p = 1;
2338 pi->destructions_p = 1;
2340 /* Trick the compiler into thinking we are at the file and line
2341 where DECL was declared so that error-messages make sense, and so
2342 that the debugger will show somewhat sensible file and line
2344 input_location = DECL_SOURCE_LOCATION (decl);
2350 Access control for implicit calls to the constructors,
2351 the conversion functions, or the destructor called to
2352 create and destroy a static data member is performed as
2353 if these calls appeared in the scope of the member's
2356 we pretend we are in a static member function of the class of
2357 which the DECL is a member. */
2358 if (member_p (decl))
2360 DECL_CONTEXT (current_function_decl) = DECL_CONTEXT (decl);
2361 DECL_STATIC_FUNCTION_P (current_function_decl) = 1;
2364 /* Conditionalize this initialization on being in the right priority
2365 and being initializing/finalizing appropriately. */
2366 guard_if_stmt = begin_if_stmt ();
2367 cond = cp_build_binary_op (EQ_EXPR,
2369 build_int_cst (NULL_TREE, priority));
2370 init_cond = initp ? integer_one_node : integer_zero_node;
2371 init_cond = cp_build_binary_op (EQ_EXPR,
2374 cond = cp_build_binary_op (TRUTH_ANDIF_EXPR, cond, init_cond);
2376 /* Assume we don't need a guard. */
2378 /* We need a guard if this is an object with external linkage that
2379 might be initialized in more than one place. (For example, a
2380 static data member of a template, when the data member requires
2382 if (TREE_PUBLIC (decl) && (DECL_COMMON (decl)
2383 || DECL_ONE_ONLY (decl)
2384 || DECL_WEAK (decl)))
2388 guard = get_guard (decl);
2390 /* When using __cxa_atexit, we just check the GUARD as we would
2391 for a local static. */
2392 if (flag_use_cxa_atexit)
2394 /* When using __cxa_atexit, we never try to destroy
2395 anything from a static destructor. */
2397 guard_cond = get_guard_cond (guard);
2399 /* If we don't have __cxa_atexit, then we will be running
2400 destructors from .fini sections, or their equivalents. So,
2401 we need to know how many times we've tried to initialize this
2402 object. We do initializations only if the GUARD is zero,
2403 i.e., if we are the first to initialize the variable. We do
2404 destructions only if the GUARD is one, i.e., if we are the
2405 last to destroy the variable. */
2408 = cp_build_binary_op (EQ_EXPR,
2409 build_unary_op (PREINCREMENT_EXPR,
2415 = cp_build_binary_op (EQ_EXPR,
2416 build_unary_op (PREDECREMENT_EXPR,
2421 cond = cp_build_binary_op (TRUTH_ANDIF_EXPR, cond, guard_cond);
2424 finish_if_stmt_cond (cond, guard_if_stmt);
2426 /* If we're using __cxa_atexit, we have not already set the GUARD,
2427 so we must do so now. */
2428 if (guard && initp && flag_use_cxa_atexit)
2429 finish_expr_stmt (set_guard (guard));
2431 return guard_if_stmt;
2434 /* We've just finished generating code to do an initialization or
2435 finalization. GUARD_IF_STMT is the if-statement we used to guard
2436 the initialization. */
2439 finish_static_initialization_or_destruction (tree guard_if_stmt)
2441 finish_then_clause (guard_if_stmt);
2442 finish_if_stmt (guard_if_stmt);
2444 /* Now that we're done with DECL we don't need to pretend to be a
2445 member of its class any longer. */
2446 DECL_CONTEXT (current_function_decl) = NULL_TREE;
2447 DECL_STATIC_FUNCTION_P (current_function_decl) = 0;
2450 /* Generate code to do the initialization of DECL, a VAR_DECL with
2451 static storage duration. The initialization is INIT. */
2454 do_static_initialization (tree decl, tree init)
2458 /* Set up for the initialization. */
2460 = start_static_initialization_or_destruction (decl,
2463 /* Perform the initialization. */
2465 finish_expr_stmt (init);
2467 /* If we're using __cxa_atexit, register a function that calls the
2468 destructor for the object. */
2469 if (flag_use_cxa_atexit)
2470 finish_expr_stmt (register_dtor_fn (decl));
2473 finish_static_initialization_or_destruction (guard_if_stmt);
2476 /* Generate code to do the static destruction of DECL. If DECL may be
2477 initialized more than once in different object files, GUARD is the
2478 guard variable to check. PRIORITY is the priority for the
2482 do_static_destruction (tree decl)
2486 /* If we're using __cxa_atexit, then destructors are registered
2487 immediately after objects are initialized. */
2488 gcc_assert (!flag_use_cxa_atexit);
2490 /* If we don't need a destructor, there's nothing to do. */
2491 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
2494 /* Actually do the destruction. */
2495 guard_if_stmt = start_static_initialization_or_destruction (decl,
2497 finish_expr_stmt (build_cleanup (decl));
2498 finish_static_initialization_or_destruction (guard_if_stmt);
2501 /* VARS is a list of variables with static storage duration which may
2502 need initialization and/or finalization. Remove those variables
2503 that don't really need to be initialized or finalized, and return
2504 the resulting list. The order in which the variables appear in
2505 VARS is in reverse order of the order in which they should actually
2506 be initialized. The list we return is in the unreversed order;
2507 i.e., the first variable should be initialized first. */
2510 prune_vars_needing_no_initialization (tree *vars)
2513 tree result = NULL_TREE;
2518 tree decl = TREE_VALUE (t);
2519 tree init = TREE_PURPOSE (t);
2521 /* Deal gracefully with error. */
2522 if (decl == error_mark_node)
2524 var = &TREE_CHAIN (t);
2528 /* The only things that can be initialized are variables. */
2529 gcc_assert (TREE_CODE (decl) == VAR_DECL);
2531 /* If this object is not defined, we don't need to do anything
2533 if (DECL_EXTERNAL (decl))
2535 var = &TREE_CHAIN (t);
2539 /* Also, if the initializer already contains errors, we can bail
2541 if (init && TREE_CODE (init) == TREE_LIST
2542 && value_member (error_mark_node, init))
2544 var = &TREE_CHAIN (t);
2548 /* This variable is going to need initialization and/or
2549 finalization, so we add it to the list. */
2550 *var = TREE_CHAIN (t);
2551 TREE_CHAIN (t) = result;
2558 /* Make sure we have told the back end about all the variables in
2562 write_out_vars (tree vars)
2566 for (v = vars; v; v = TREE_CHAIN (v))
2568 tree var = TREE_VALUE (v);
2569 if (!var_finalized_p (var))
2571 import_export_decl (var);
2572 rest_of_decl_compilation (var, 1, 1);
2577 /* Generate a static constructor (if CONSTRUCTOR_P) or destructor
2578 (otherwise) that will initialize all gobal objects with static
2579 storage duration having the indicated PRIORITY. */
2582 generate_ctor_or_dtor_function (bool constructor_p, int priority,
2591 input_location = *locus;
2592 #ifdef USE_MAPPED_LOCATION
2598 /* We use `I' to indicate initialization and `D' to indicate
2600 function_key = constructor_p ? 'I' : 'D';
2602 /* We emit the function lazily, to avoid generating empty
2603 global constructors and destructors. */
2606 /* For Objective-C++, we may need to initialize metadata found in this module.
2607 This must be done _before_ any other static initializations. */
2608 if (c_dialect_objc () && (priority == DEFAULT_INIT_PRIORITY)
2609 && constructor_p && objc_static_init_needed_p ())
2611 body = start_objects (function_key, priority);
2612 static_ctors = objc_generate_static_init_call (static_ctors);
2615 /* Call the static storage duration function with appropriate
2617 for (i = 0; VEC_iterate (tree, ssdf_decls, i, fndecl); ++i)
2619 /* Calls to pure or const functions will expand to nothing. */
2620 if (! (flags_from_decl_or_type (fndecl) & (ECF_CONST | ECF_PURE)))
2623 body = start_objects (function_key, priority);
2625 arguments = tree_cons (NULL_TREE,
2626 build_int_cst (NULL_TREE, priority),
2628 arguments = tree_cons (NULL_TREE,
2629 build_int_cst (NULL_TREE, constructor_p),
2631 finish_expr_stmt (build_function_call (fndecl, arguments));
2635 /* If we're generating code for the DEFAULT_INIT_PRIORITY, throw in
2636 calls to any functions marked with attributes indicating that
2637 they should be called at initialization- or destruction-time. */
2638 if (priority == DEFAULT_INIT_PRIORITY)
2642 for (fns = constructor_p ? static_ctors : static_dtors;
2644 fns = TREE_CHAIN (fns))
2646 fndecl = TREE_VALUE (fns);
2648 /* Calls to pure/const functions will expand to nothing. */
2649 if (! (flags_from_decl_or_type (fndecl) & (ECF_CONST | ECF_PURE)))
2652 body = start_objects (function_key, priority);
2653 finish_expr_stmt (build_function_call (fndecl, NULL_TREE));
2658 /* Close out the function. */
2660 finish_objects (function_key, priority, body);
2663 /* Generate constructor and destructor functions for the priority
2667 generate_ctor_and_dtor_functions_for_priority (splay_tree_node n, void * data)
2669 location_t *locus = data;
2670 int priority = (int) n->key;
2671 priority_info pi = (priority_info) n->value;
2673 /* Generate the functions themselves, but only if they are really
2675 if (pi->initializations_p
2676 || (priority == DEFAULT_INIT_PRIORITY && static_ctors))
2677 generate_ctor_or_dtor_function (/*constructor_p=*/true, priority, locus);
2678 if (pi->destructions_p
2679 || (priority == DEFAULT_INIT_PRIORITY && static_dtors))
2680 generate_ctor_or_dtor_function (/*constructor_p=*/false, priority, locus);
2682 /* Keep iterating. */
2686 /* Called via LANGHOOK_CALLGRAPH_ANALYZE_EXPR. It is supposed to mark
2687 decls referenced from frontend specific constructs; it will be called
2688 only for language-specific tree nodes.
2690 Here we must deal with member pointers. */
2693 cxx_callgraph_analyze_expr (tree *tp, int *walk_subtrees ATTRIBUTE_UNUSED,
2694 tree from ATTRIBUTE_UNUSED)
2698 switch (TREE_CODE (t))
2701 if (TYPE_PTRMEMFUNC_P (TREE_TYPE (t)))
2702 cgraph_mark_needed_node (cgraph_node (PTRMEM_CST_MEMBER (t)));
2705 if (TREE_CODE (BASELINK_FUNCTIONS (t)) == FUNCTION_DECL)
2706 cgraph_mark_needed_node (cgraph_node (BASELINK_FUNCTIONS (t)));
2709 if (DECL_VTABLE_OR_VTT_P (t))
2711 /* The ABI requires that all virtual tables be emitted
2712 whenever one of them is. */
2714 for (vtbl = CLASSTYPE_VTABLES (DECL_CONTEXT (t));
2716 vtbl = TREE_CHAIN (vtbl))
2717 mark_decl_referenced (vtbl);
2719 else if (DECL_CONTEXT (t)
2720 && TREE_CODE (DECL_CONTEXT (t)) == FUNCTION_DECL)
2721 /* If we need a static variable in a function, then we
2722 need the containing function. */
2723 mark_decl_referenced (DECL_CONTEXT (t));
2732 /* Java requires that we be able to reference a local address for a
2733 method, and not be confused by PLT entries. If hidden aliases are
2734 supported, emit one for each java function that we've emitted. */
2737 build_java_method_aliases (void)
2739 struct cgraph_node *node;
2741 #ifndef HAVE_GAS_HIDDEN
2745 for (node = cgraph_nodes; node ; node = node->next)
2747 tree fndecl = node->decl;
2749 if (TREE_ASM_WRITTEN (fndecl)
2750 && DECL_CONTEXT (fndecl)
2751 && TYPE_P (DECL_CONTEXT (fndecl))
2752 && TYPE_FOR_JAVA (DECL_CONTEXT (fndecl))
2753 && TARGET_USE_LOCAL_THUNK_ALIAS_P (fndecl))
2755 /* Mangle the name in a predictable way; we need to reference
2756 this from a java compiled object file. */
2757 tree oid, nid, alias;
2761 oid = DECL_ASSEMBLER_NAME (fndecl);
2762 oname = IDENTIFIER_POINTER (oid);
2763 gcc_assert (oname[0] == '_' && oname[1] == 'Z');
2764 nname = ACONCAT (("_ZGA", oname+2, NULL));
2765 nid = get_identifier (nname);
2767 alias = make_alias_for (fndecl, nid);
2768 TREE_PUBLIC (alias) = 1;
2769 DECL_VISIBILITY (alias) = VISIBILITY_HIDDEN;
2771 assemble_alias (alias, oid);
2776 /* This routine is called from the last rule in yyparse ().
2777 Its job is to create all the code needed to initialize and
2778 destroy the global aggregates. We do the destruction
2779 first, since that way we only need to reverse the decls once. */
2782 cp_finish_file (void)
2788 unsigned ssdf_count = 0;
2792 locus = input_location;
2795 /* Bad parse errors. Just forget about it. */
2796 if (! global_bindings_p () || current_class_type || decl_namespace_list)
2800 c_common_write_pch ();
2802 #ifdef USE_MAPPED_LOCATION
2805 /* Otherwise, GDB can get confused, because in only knows
2806 about source for LINENO-1 lines. */
2810 /* We now have to write out all the stuff we put off writing out.
2813 o Template specializations that we have not yet instantiated,
2814 but which are needed.
2815 o Initialization and destruction for non-local objects with
2816 static storage duration. (Local objects with static storage
2817 duration are initialized when their scope is first entered,
2818 and are cleaned up via atexit.)
2819 o Virtual function tables.
2821 All of these may cause others to be needed. For example,
2822 instantiating one function may cause another to be needed, and
2823 generating the initializer for an object may cause templates to be
2824 instantiated, etc., etc. */
2826 timevar_push (TV_VARCONST);
2828 emit_support_tinfos ();
2837 /* If there are templates that we've put off instantiating, do
2839 instantiate_pending_templates (retries);
2842 /* Write out virtual tables as required. Note that writing out
2843 the virtual table for a template class may cause the
2844 instantiation of members of that class. If we write out
2845 vtables then we remove the class from our list so we don't
2846 have to look at it again. */
2848 while (keyed_classes != NULL_TREE
2849 && maybe_emit_vtables (TREE_VALUE (keyed_classes)))
2852 keyed_classes = TREE_CHAIN (keyed_classes);
2858 tree next = TREE_CHAIN (t);
2862 if (maybe_emit_vtables (TREE_VALUE (next)))
2865 TREE_CHAIN (t) = TREE_CHAIN (next);
2870 next = TREE_CHAIN (t);
2874 /* Write out needed type info variables. We have to be careful
2875 looping through unemitted decls, because emit_tinfo_decl may
2876 cause other variables to be needed. New elements will be
2877 appended, and we remove from the vector those that actually
2879 for (i = VEC_length (tree, unemitted_tinfo_decls);
2880 VEC_iterate (tree, unemitted_tinfo_decls, --i, t);)
2881 if (emit_tinfo_decl (t))
2884 VEC_unordered_remove (tree, unemitted_tinfo_decls, i);
2887 /* The list of objects with static storage duration is built up
2888 in reverse order. We clear STATIC_AGGREGATES so that any new
2889 aggregates added during the initialization of these will be
2890 initialized in the correct order when we next come around the
2892 vars = prune_vars_needing_no_initialization (&static_aggregates);
2898 /* We need to start a new initialization function each time
2899 through the loop. That's because we need to know which
2900 vtables have been referenced, and TREE_SYMBOL_REFERENCED
2901 isn't computed until a function is finished, and written
2902 out. That's a deficiency in the back-end. When this is
2903 fixed, these initialization functions could all become
2904 inline, with resulting performance improvements. */
2907 /* Set the line and file, so that it is obviously not from
2909 input_location = locus;
2910 ssdf_body = start_static_storage_duration_function (ssdf_count);
2912 /* Make sure the back end knows about all the variables. */
2913 write_out_vars (vars);
2915 /* First generate code to do all the initializations. */
2916 for (v = vars; v; v = TREE_CHAIN (v))
2917 do_static_initialization (TREE_VALUE (v),
2920 /* Then, generate code to do all the destructions. Do these
2921 in reverse order so that the most recently constructed
2922 variable is the first destroyed. If we're using
2923 __cxa_atexit, then we don't need to do this; functions
2924 were registered at initialization time to destroy the
2926 if (!flag_use_cxa_atexit)
2928 vars = nreverse (vars);
2929 for (v = vars; v; v = TREE_CHAIN (v))
2930 do_static_destruction (TREE_VALUE (v));
2935 /* Finish up the static storage duration function for this
2937 input_location = locus;
2938 finish_static_storage_duration_function (ssdf_body);
2940 /* All those initializations and finalizations might cause
2941 us to need more inline functions, more template
2942 instantiations, etc. */
2945 #ifdef USE_MAPPED_LOCATION
2952 /* Go through the set of inline functions whose bodies have not
2953 been emitted yet. If out-of-line copies of these functions
2954 are required, emit them. */
2955 for (i = 0; VEC_iterate (tree, deferred_fns, i, decl); ++i)
2957 /* Does it need synthesizing? */
2958 if (DECL_ARTIFICIAL (decl) && ! DECL_INITIAL (decl)
2959 && (! DECL_REALLY_EXTERN (decl) || DECL_INLINE (decl)))
2961 /* Even though we're already at the top-level, we push
2962 there again. That way, when we pop back a few lines
2963 hence, all of our state is restored. Otherwise,
2964 finish_function doesn't clean things up, and we end
2965 up with CURRENT_FUNCTION_DECL set. */
2966 push_to_top_level ();
2967 /* The decl's location will mark where it was first
2968 needed. Save that so synthesize method can indicate
2969 where it was needed from, in case of error */
2970 input_location = DECL_SOURCE_LOCATION (decl);
2971 synthesize_method (decl);
2972 pop_from_top_level ();
2976 if (!DECL_SAVED_TREE (decl))
2979 import_export_decl (decl);
2981 /* We lie to the back-end, pretending that some functions
2982 are not defined when they really are. This keeps these
2983 functions from being put out unnecessarily. But, we must
2984 stop lying when the functions are referenced, or if they
2985 are not comdat since they need to be put out now. This
2986 is done in a separate for cycle, because if some deferred
2987 function is contained in another deferred function later
2988 in deferred_fns varray, rest_of_compilation would skip
2989 this function and we really cannot expand the same
2991 if (DECL_NOT_REALLY_EXTERN (decl)
2992 && DECL_INITIAL (decl)
2993 && decl_needed_p (decl))
2994 DECL_EXTERNAL (decl) = 0;
2996 /* If we're going to need to write this function out, and
2997 there's already a body for it, create RTL for it now.
2998 (There might be no body if this is a method we haven't
2999 gotten around to synthesizing yet.) */
3000 if (!DECL_EXTERNAL (decl)
3001 && decl_needed_p (decl)
3002 && !TREE_ASM_WRITTEN (decl)
3003 && !cgraph_node (decl)->local.finalized)
3005 /* We will output the function; no longer consider it in this
3007 DECL_DEFER_OUTPUT (decl) = 0;
3008 /* Generate RTL for this function now that we know we
3010 expand_or_defer_fn (decl);
3011 /* If we're compiling -fsyntax-only pretend that this
3012 function has been written out so that we don't try to
3014 if (flag_syntax_only)
3015 TREE_ASM_WRITTEN (decl) = 1;
3020 if (walk_namespaces (wrapup_globals_for_namespace, /*data=*/0))
3023 /* Static data members are just like namespace-scope globals. */
3024 for (i = 0; VEC_iterate (tree, pending_statics, i, decl); ++i)
3026 if (var_finalized_p (decl) || DECL_REALLY_EXTERN (decl))
3028 import_export_decl (decl);
3029 /* If this static data member is needed, provide it to the
3031 if (DECL_NOT_REALLY_EXTERN (decl) && decl_needed_p (decl))
3032 DECL_EXTERNAL (decl) = 0;
3034 if (VEC_length (tree, pending_statics) != 0
3035 && wrapup_global_declarations (VEC_address (tree, pending_statics),
3036 VEC_length (tree, pending_statics)))
3043 /* All used inline functions must have a definition at this point. */
3044 for (i = 0; VEC_iterate (tree, deferred_fns, i, decl); ++i)
3046 if (/* Check online inline functions that were actually used. */
3047 TREE_USED (decl) && DECL_DECLARED_INLINE_P (decl)
3048 /* But not defined. */
3049 && DECL_REALLY_EXTERN (decl)
3050 /* If we decided to emit this function in another
3051 translation unit, the fact that the definition was
3052 missing here likely indicates only that the repository
3053 decided to place the function elsewhere. With -Winline,
3054 we will still warn if we could not inline the
3056 && !flag_use_repository
3057 /* An explicit instantiation can be used to specify
3058 that the body is in another unit. It will have
3059 already verified there was a definition. */
3060 && !DECL_EXPLICIT_INSTANTIATION (decl))
3062 warning (0, "inline function %q+D used but never defined", decl);
3063 /* This symbol is effectively an "extern" declaration now.
3064 This is not strictly necessary, but removes a duplicate
3066 TREE_PUBLIC (decl) = 1;
3070 /* We give C linkage to static constructors and destructors. */
3071 push_lang_context (lang_name_c);
3073 /* Generate initialization and destruction functions for all
3074 priorities for which they are required. */
3075 if (priority_info_map)
3076 splay_tree_foreach (priority_info_map,
3077 generate_ctor_and_dtor_functions_for_priority,
3081 /* If we have a ctor or this is obj-c++ and we need a static init,
3082 call generate_ctor_or_dtor_function. */
3083 if (static_ctors || (c_dialect_objc () && objc_static_init_needed_p ()))
3084 generate_ctor_or_dtor_function (/*constructor_p=*/true,
3085 DEFAULT_INIT_PRIORITY, &locus);
3087 generate_ctor_or_dtor_function (/*constructor_p=*/false,
3088 DEFAULT_INIT_PRIORITY, &locus);
3091 /* We're done with the splay-tree now. */
3092 if (priority_info_map)
3093 splay_tree_delete (priority_info_map);
3095 /* Generate any missing aliases. */
3096 maybe_apply_pending_pragma_weaks ();
3098 /* We're done with static constructors, so we can go back to "C++"
3100 pop_lang_context ();
3102 cgraph_finalize_compilation_unit ();
3105 /* Now, issue warnings about static, but not defined, functions,
3106 etc., and emit debugging information. */
3107 walk_namespaces (wrapup_globals_for_namespace, /*data=*/&reconsider);
3108 if (VEC_length (tree, pending_statics) != 0)
3109 check_global_declarations (VEC_address (tree, pending_statics),
3110 VEC_length (tree, pending_statics));
3112 /* Generate hidden aliases for Java. */
3113 build_java_method_aliases ();
3117 /* The entire file is now complete. If requested, dump everything
3121 FILE *stream = dump_begin (TDI_tu, &flags);
3125 dump_node (global_namespace, flags & ~TDF_SLIM, stream);
3126 dump_end (TDI_tu, stream);
3130 timevar_pop (TV_VARCONST);
3132 if (flag_detailed_statistics)
3134 dump_tree_statistics ();
3135 dump_time_statistics ();
3137 input_location = locus;
3139 #ifdef ENABLE_CHECKING
3140 validate_conversion_obstack ();
3141 #endif /* ENABLE_CHECKING */
3144 /* FN is an OFFSET_REF, DOTSTAR_EXPR or MEMBER_REF indicating the
3145 function to call in parse-tree form; it has not yet been
3146 semantically analyzed. ARGS are the arguments to the function.
3147 They have already been semantically analyzed. */
3150 build_offset_ref_call_from_tree (tree fn, tree args)
3159 object = TREE_OPERAND (fn, 0);
3161 if (processing_template_decl)
3163 gcc_assert (TREE_CODE (fn) == DOTSTAR_EXPR
3164 || TREE_CODE (fn) == MEMBER_REF);
3165 if (type_dependent_expression_p (fn)
3166 || any_type_dependent_arguments_p (args))
3167 return build_min_nt (CALL_EXPR, fn, args, NULL_TREE);
3169 /* Transform the arguments and add the implicit "this"
3170 parameter. That must be done before the FN is transformed
3171 because we depend on the form of FN. */
3172 args = build_non_dependent_args (args);
3173 if (TREE_CODE (fn) == DOTSTAR_EXPR)
3174 object = build_unary_op (ADDR_EXPR, object, 0);
3175 object = build_non_dependent_expr (object);
3176 args = tree_cons (NULL_TREE, object, args);
3177 /* Now that the arguments are done, transform FN. */
3178 fn = build_non_dependent_expr (fn);
3181 /* A qualified name corresponding to a bound pointer-to-member is
3182 represented as an OFFSET_REF:
3184 struct B { void g(); };
3186 void B::g() { (this->*p)(); } */
3187 if (TREE_CODE (fn) == OFFSET_REF)
3189 tree object_addr = build_unary_op (ADDR_EXPR, object, 0);
3190 fn = TREE_OPERAND (fn, 1);
3191 fn = get_member_function_from_ptrfunc (&object_addr, fn);
3192 args = tree_cons (NULL_TREE, object_addr, args);
3195 expr = build_function_call (fn, args);
3196 if (processing_template_decl && expr != error_mark_node)
3197 return build_min_non_dep (CALL_EXPR, expr, orig_fn, orig_args, NULL_TREE);
3203 check_default_args (tree x)
3205 tree arg = TYPE_ARG_TYPES (TREE_TYPE (x));
3206 bool saw_def = false;
3207 int i = 0 - (TREE_CODE (TREE_TYPE (x)) == METHOD_TYPE);
3208 for (; arg && arg != void_list_node; arg = TREE_CHAIN (arg), ++i)
3210 if (TREE_PURPOSE (arg))
3214 error ("default argument missing for parameter %P of %q+#D", i, x);
3220 /* Mark DECL as "used" in the program. If DECL is a specialization or
3221 implicitly declared class member, generate the actual definition. */
3224 mark_used (tree decl)
3226 HOST_WIDE_INT saved_processing_template_decl = 0;
3228 TREE_USED (decl) = 1;
3229 /* If we don't need a value, then we don't need to synthesize DECL. */
3230 if (skip_evaluation)
3232 /* Normally, we can wait until instantiation-time to synthesize
3233 DECL. However, if DECL is a static data member initialized with
3234 a constant, we need the value right now because a reference to
3235 such a data member is not value-dependent. */
3236 if (processing_template_decl)
3238 if (TREE_CODE (decl) == VAR_DECL
3239 && DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl)
3240 && DECL_CLASS_SCOPE_P (decl)
3241 && !dependent_type_p (DECL_CONTEXT (decl)))
3243 /* Pretend that we are not in a template so that the
3244 initializer for the static data member will be full
3246 saved_processing_template_decl = processing_template_decl;
3247 processing_template_decl = 0;
3253 if (TREE_CODE (decl) == FUNCTION_DECL && DECL_DECLARED_INLINE_P (decl)
3254 && !TREE_ASM_WRITTEN (decl))
3255 /* Remember it, so we can check it was defined. */
3257 if (DECL_DEFERRED_FN (decl))
3260 /* Remember the current location for a function we will end up
3261 synthesizing. Then we can inform the user where it was
3262 required in the case of error. */
3263 if (DECL_ARTIFICIAL (decl) && DECL_NONSTATIC_MEMBER_FUNCTION_P (decl)
3264 && !DECL_THUNK_P (decl))
3265 DECL_SOURCE_LOCATION (decl) = input_location;
3267 note_vague_linkage_fn (decl);
3270 assemble_external (decl);
3272 /* Is it a synthesized method that needs to be synthesized? */
3273 if (TREE_CODE (decl) == FUNCTION_DECL
3274 && DECL_NONSTATIC_MEMBER_FUNCTION_P (decl)
3275 && DECL_ARTIFICIAL (decl)
3276 && !DECL_THUNK_P (decl)
3277 && ! DECL_INITIAL (decl)
3278 /* Kludge: don't synthesize for default args. Unfortunately this
3279 rules out initializers of namespace-scoped objects too, but
3280 it's sort-of ok if the implicit ctor or dtor decl keeps
3281 pointing to the class location. */
3282 && current_function_decl)
3284 synthesize_method (decl);
3285 /* If we've already synthesized the method we don't need to
3286 instantiate it, so we can return right away. */
3290 /* If this is a function or variable that is an instance of some
3291 template, we now know that we will need to actually do the
3292 instantiation. We check that DECL is not an explicit
3293 instantiation because that is not checked in instantiate_decl. */
3294 if ((DECL_NON_THUNK_FUNCTION_P (decl) || TREE_CODE (decl) == VAR_DECL)
3295 && DECL_LANG_SPECIFIC (decl) && DECL_TEMPLATE_INFO (decl)
3296 && (!DECL_EXPLICIT_INSTANTIATION (decl)
3297 || (TREE_CODE (decl) == FUNCTION_DECL
3298 && DECL_INLINE (DECL_TEMPLATE_RESULT
3299 (template_for_substitution (decl))))
3300 /* We need to instantiate static data members so that there
3301 initializers are available in integral constant
3303 || (TREE_CODE (decl) == VAR_DECL
3304 && DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl))))
3305 /* We put off instantiating functions in order to improve compile
3306 times. Maintaining a stack of active functions is expensive,
3307 and the inliner knows to instantiate any functions it might
3309 instantiate_decl (decl, /*defer_ok=*/true,
3310 /*expl_inst_class_mem_p=*/false);
3312 processing_template_decl = saved_processing_template_decl;
3315 #include "gt-cp-decl2.h"