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 VAR_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))
1106 decl = build_decl (VAR_DECL, DECL_NAME (field), TREE_TYPE (field));
1108 base = get_base_address (object);
1109 TREE_PUBLIC (decl) = TREE_PUBLIC (base);
1110 TREE_STATIC (decl) = TREE_STATIC (base);
1111 DECL_EXTERNAL (decl) = DECL_EXTERNAL (base);
1113 SET_DECL_VALUE_EXPR (decl, ref);
1114 DECL_HAS_VALUE_EXPR_P (decl) = 1;
1116 decl = pushdecl (decl);
1118 else if (ANON_AGGR_TYPE_P (TREE_TYPE (field)))
1119 decl = build_anon_union_vars (TREE_TYPE (field), ref);
1123 if (main_decl == NULL_TREE)
1130 /* Finish off the processing of a UNION_TYPE structure. If the union is an
1131 anonymous union, then all members must be laid out together. PUBLIC_P
1132 is nonzero if this union is not declared static. */
1135 finish_anon_union (tree anon_union_decl)
1141 if (anon_union_decl == error_mark_node)
1144 type = TREE_TYPE (anon_union_decl);
1145 public_p = TREE_PUBLIC (anon_union_decl);
1147 /* The VAR_DECL's context is the same as the TYPE's context. */
1148 DECL_CONTEXT (anon_union_decl) = DECL_CONTEXT (TYPE_NAME (type));
1150 if (TYPE_FIELDS (type) == NULL_TREE)
1155 error ("namespace-scope anonymous aggregates must be static");
1159 main_decl = build_anon_union_vars (type, anon_union_decl);
1160 if (main_decl == NULL_TREE)
1162 warning (0, "anonymous union with no members");
1166 if (!processing_template_decl)
1168 /* Use main_decl to set the mangled name. */
1169 DECL_NAME (anon_union_decl) = DECL_NAME (main_decl);
1170 mangle_decl (anon_union_decl);
1171 DECL_NAME (anon_union_decl) = NULL_TREE;
1174 pushdecl (anon_union_decl);
1175 if (building_stmt_tree ()
1176 && at_function_scope_p ())
1177 add_decl_expr (anon_union_decl);
1178 else if (!processing_template_decl)
1179 rest_of_decl_compilation (anon_union_decl,
1180 toplevel_bindings_p (), at_eof);
1183 /* Auxiliary functions to make type signatures for
1184 `operator new' and `operator delete' correspond to
1185 what compiler will be expecting. */
1188 coerce_new_type (tree type)
1191 tree args = TYPE_ARG_TYPES (type);
1193 gcc_assert (TREE_CODE (type) == FUNCTION_TYPE);
1195 if (!same_type_p (TREE_TYPE (type), ptr_type_node))
1198 error ("%<operator new%> must return type %qT", ptr_type_node);
1201 if (!args || args == void_list_node
1202 || !same_type_p (TREE_VALUE (args), size_type_node))
1205 if (args && args != void_list_node)
1206 args = TREE_CHAIN (args);
1207 pedwarn ("%<operator new%> takes type %<size_t%> (%qT) "
1208 "as first parameter", size_type_node);
1213 args = tree_cons (NULL_TREE, size_type_node, args);
1216 type = build_exception_variant
1217 (build_function_type (ptr_type_node, args),
1218 TYPE_RAISES_EXCEPTIONS (type));
1226 coerce_delete_type (tree type)
1229 tree args = TYPE_ARG_TYPES (type);
1231 gcc_assert (TREE_CODE (type) == FUNCTION_TYPE);
1233 if (!same_type_p (TREE_TYPE (type), void_type_node))
1236 error ("%<operator delete%> must return type %qT", void_type_node);
1239 if (!args || args == void_list_node
1240 || !same_type_p (TREE_VALUE (args), ptr_type_node))
1243 if (args && args != void_list_node)
1244 args = TREE_CHAIN (args);
1245 error ("%<operator delete%> takes type %qT as first parameter",
1251 args = tree_cons (NULL_TREE, ptr_type_node, args);
1254 type = build_exception_variant
1255 (build_function_type (void_type_node, args),
1256 TYPE_RAISES_EXCEPTIONS (type));
1265 mark_vtable_entries (tree decl)
1268 unsigned HOST_WIDE_INT idx;
1270 FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (DECL_INITIAL (decl)),
1275 STRIP_NOPS (fnaddr);
1277 if (TREE_CODE (fnaddr) != ADDR_EXPR
1278 && TREE_CODE (fnaddr) != FDESC_EXPR)
1279 /* This entry is an offset: a virtual base class offset, a
1280 virtual call offset, an RTTI offset, etc. */
1283 fn = TREE_OPERAND (fnaddr, 0);
1284 TREE_ADDRESSABLE (fn) = 1;
1285 /* When we don't have vcall offsets, we output thunks whenever
1286 we output the vtables that contain them. With vcall offsets,
1287 we know all the thunks we'll need when we emit a virtual
1288 function, so we emit the thunks there instead. */
1289 if (DECL_THUNK_P (fn))
1290 use_thunk (fn, /*emit_p=*/0);
1295 /* Set DECL up to have the closest approximation of "initialized common"
1296 linkage available. */
1299 comdat_linkage (tree decl)
1302 make_decl_one_only (decl);
1303 else if (TREE_CODE (decl) == FUNCTION_DECL
1304 || (TREE_CODE (decl) == VAR_DECL && DECL_ARTIFICIAL (decl)))
1305 /* We can just emit function and compiler-generated variables
1306 statically; having multiple copies is (for the most part) only
1309 There are two correctness issues, however: the address of a
1310 template instantiation with external linkage should be the
1311 same, independent of what translation unit asks for the
1312 address, and this will not hold when we emit multiple copies of
1313 the function. However, there's little else we can do.
1315 Also, by default, the typeinfo implementation assumes that
1316 there will be only one copy of the string used as the name for
1317 each type. Therefore, if weak symbols are unavailable, the
1318 run-time library should perform a more conservative check; it
1319 should perform a string comparison, rather than an address
1321 TREE_PUBLIC (decl) = 0;
1324 /* Static data member template instantiations, however, cannot
1325 have multiple copies. */
1326 if (DECL_INITIAL (decl) == 0
1327 || DECL_INITIAL (decl) == error_mark_node)
1328 DECL_COMMON (decl) = 1;
1329 else if (EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl)))
1331 DECL_COMMON (decl) = 1;
1332 DECL_INITIAL (decl) = error_mark_node;
1334 else if (!DECL_EXPLICIT_INSTANTIATION (decl))
1336 /* We can't do anything useful; leave vars for explicit
1338 DECL_EXTERNAL (decl) = 1;
1339 DECL_NOT_REALLY_EXTERN (decl) = 0;
1343 if (DECL_LANG_SPECIFIC (decl))
1344 DECL_COMDAT (decl) = 1;
1347 /* For win32 we also want to put explicit instantiations in
1348 linkonce sections, so that they will be merged with implicit
1349 instantiations; otherwise we get duplicate symbol errors.
1350 For Darwin we do not want explicit instantiations to be
1354 maybe_make_one_only (tree decl)
1356 /* We used to say that this was not necessary on targets that support weak
1357 symbols, because the implicit instantiations will defer to the explicit
1358 one. However, that's not actually the case in SVR4; a strong definition
1359 after a weak one is an error. Also, not making explicit
1360 instantiations one_only means that we can end up with two copies of
1361 some template instantiations. */
1365 /* We can't set DECL_COMDAT on functions, or cp_finish_file will think
1366 we can get away with not emitting them if they aren't used. We need
1367 to for variables so that cp_finish_decl will update their linkage,
1368 because their DECL_INITIAL may not have been set properly yet. */
1370 if (!TARGET_WEAK_NOT_IN_ARCHIVE_TOC
1371 || (! DECL_EXPLICIT_INSTANTIATION (decl)
1372 && ! DECL_TEMPLATE_SPECIALIZATION (decl)))
1374 make_decl_one_only (decl);
1376 if (TREE_CODE (decl) == VAR_DECL)
1378 DECL_COMDAT (decl) = 1;
1379 /* Mark it needed so we don't forget to emit it. */
1380 mark_decl_referenced (decl);
1385 /* Determine whether or not we want to specifically import or export CTYPE,
1386 using various heuristics. */
1389 import_export_class (tree ctype)
1391 /* -1 for imported, 1 for exported. */
1392 int import_export = 0;
1394 /* It only makes sense to call this function at EOF. The reason is
1395 that this function looks at whether or not the first non-inline
1396 non-abstract virtual member function has been defined in this
1397 translation unit. But, we can't possibly know that until we've
1398 seen the entire translation unit. */
1399 gcc_assert (at_eof);
1401 if (CLASSTYPE_INTERFACE_KNOWN (ctype))
1404 /* If MULTIPLE_SYMBOL_SPACES is set and we saw a #pragma interface,
1405 we will have CLASSTYPE_INTERFACE_ONLY set but not
1406 CLASSTYPE_INTERFACE_KNOWN. In that case, we don't want to use this
1407 heuristic because someone will supply a #pragma implementation
1408 elsewhere, and deducing it here would produce a conflict. */
1409 if (CLASSTYPE_INTERFACE_ONLY (ctype))
1412 if (lookup_attribute ("dllimport", TYPE_ATTRIBUTES (ctype)))
1414 else if (lookup_attribute ("dllexport", TYPE_ATTRIBUTES (ctype)))
1416 else if (CLASSTYPE_IMPLICIT_INSTANTIATION (ctype)
1417 && !flag_implicit_templates)
1418 /* For a template class, without -fimplicit-templates, check the
1419 repository. If the virtual table is assigned to this
1420 translation unit, then export the class; otherwise, import
1422 import_export = repo_export_class_p (ctype) ? 1 : -1;
1423 else if (TYPE_POLYMORPHIC_P (ctype))
1425 /* The ABI specifies that the virtual table and associated
1426 information are emitted with the key method, if any. */
1427 tree method = CLASSTYPE_KEY_METHOD (ctype);
1428 /* If weak symbol support is not available, then we must be
1429 careful not to emit the vtable when the key function is
1430 inline. An inline function can be defined in multiple
1431 translation units. If we were to emit the vtable in each
1432 translation unit containing a definition, we would get
1433 multiple definition errors at link-time. */
1434 if (method && (flag_weak || ! DECL_DECLARED_INLINE_P (method)))
1435 import_export = (DECL_REALLY_EXTERN (method) ? -1 : 1);
1438 /* When MULTIPLE_SYMBOL_SPACES is set, we cannot count on seeing
1439 a definition anywhere else. */
1440 if (MULTIPLE_SYMBOL_SPACES && import_export == -1)
1443 /* Allow backends the chance to overrule the decision. */
1444 if (targetm.cxx.import_export_class)
1445 import_export = targetm.cxx.import_export_class (ctype, import_export);
1449 SET_CLASSTYPE_INTERFACE_KNOWN (ctype);
1450 CLASSTYPE_INTERFACE_ONLY (ctype) = (import_export < 0);
1454 /* Return true if VAR has already been provided to the back end; in that
1455 case VAR should not be modified further by the front end. */
1457 var_finalized_p (tree var)
1459 return cgraph_varpool_node (var)->finalized;
1462 /* DECL is a VAR_DECL or FUNCTION_DECL which, for whatever reason,
1463 must be emitted in this translation unit. Mark it as such. */
1466 mark_needed (tree decl)
1468 /* It's possible that we no longer need to set
1469 TREE_SYMBOL_REFERENCED here directly, but doing so is
1471 TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl)) = 1;
1472 mark_decl_referenced (decl);
1475 /* DECL is either a FUNCTION_DECL or a VAR_DECL. This function
1476 returns true if a definition of this entity should be provided in
1477 this object file. Callers use this function to determine whether
1478 or not to let the back end know that a definition of DECL is
1479 available in this translation unit. */
1482 decl_needed_p (tree decl)
1484 gcc_assert (TREE_CODE (decl) == VAR_DECL
1485 || TREE_CODE (decl) == FUNCTION_DECL);
1486 /* This function should only be called at the end of the translation
1487 unit. We cannot be sure of whether or not something will be
1488 COMDAT until that point. */
1489 gcc_assert (at_eof);
1491 /* All entities with external linkage that are not COMDAT should be
1492 emitted; they may be referred to from other object files. */
1493 if (TREE_PUBLIC (decl) && !DECL_COMDAT (decl))
1495 /* If this entity was used, let the back-end see it; it will decide
1496 whether or not to emit it into the object file. */
1497 if (TREE_USED (decl)
1498 || (DECL_ASSEMBLER_NAME_SET_P (decl)
1499 && TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl))))
1501 /* Otherwise, DECL does not need to be emitted -- yet. A subsequent
1502 reference to DECL might cause it to be emitted later. */
1506 /* If necessary, write out the vtables for the dynamic class CTYPE.
1507 Returns true if any vtables were emitted. */
1510 maybe_emit_vtables (tree ctype)
1516 /* If the vtables for this class have already been emitted there is
1517 nothing more to do. */
1518 primary_vtbl = CLASSTYPE_VTABLES (ctype);
1519 if (var_finalized_p (primary_vtbl))
1521 /* Ignore dummy vtables made by get_vtable_decl. */
1522 if (TREE_TYPE (primary_vtbl) == void_type_node)
1525 /* On some targets, we cannot determine the key method until the end
1526 of the translation unit -- which is when this function is
1528 if (!targetm.cxx.key_method_may_be_inline ())
1529 determine_key_method (ctype);
1531 /* See if any of the vtables are needed. */
1532 for (vtbl = CLASSTYPE_VTABLES (ctype); vtbl; vtbl = TREE_CHAIN (vtbl))
1534 import_export_decl (vtbl);
1535 if (DECL_NOT_REALLY_EXTERN (vtbl) && decl_needed_p (vtbl))
1540 /* If the references to this class' vtables are optimized away,
1541 still emit the appropriate debugging information. See
1543 if (DECL_COMDAT (primary_vtbl)
1544 && CLASSTYPE_DEBUG_REQUESTED (ctype))
1545 note_debug_info_needed (ctype);
1549 /* The ABI requires that we emit all of the vtables if we emit any
1551 for (vtbl = CLASSTYPE_VTABLES (ctype); vtbl; vtbl = TREE_CHAIN (vtbl))
1553 /* Mark entities references from the virtual table as used. */
1554 mark_vtable_entries (vtbl);
1556 if (TREE_TYPE (DECL_INITIAL (vtbl)) == 0)
1558 tree expr = store_init_value (vtbl, DECL_INITIAL (vtbl));
1560 /* It had better be all done at compile-time. */
1565 DECL_EXTERNAL (vtbl) = 0;
1566 rest_of_decl_compilation (vtbl, 1, 1);
1568 /* Because we're only doing syntax-checking, we'll never end up
1569 actually marking the variable as written. */
1570 if (flag_syntax_only)
1571 TREE_ASM_WRITTEN (vtbl) = 1;
1574 /* Since we're writing out the vtable here, also write the debug
1576 note_debug_info_needed (ctype);
1581 /* Like c_determine_visibility, but with additional C++-specific
1585 determine_visibility (tree decl)
1589 /* Cloned constructors and destructors get the same visibility as
1590 the underlying function. That should be set up in
1591 maybe_clone_body. */
1592 gcc_assert (!DECL_CLONED_FUNCTION_P (decl));
1594 /* Give the common code a chance to make a determination. */
1595 if (c_determine_visibility (decl))
1598 /* If DECL is a member of a class, visibility specifiers on the
1599 class can influence the visibility of the DECL. */
1600 if (DECL_CLASS_SCOPE_P (decl))
1601 class_type = DECL_CONTEXT (decl);
1602 else if (TREE_CODE (decl) == VAR_DECL
1603 && DECL_TINFO_P (decl)
1604 && CLASS_TYPE_P (TREE_TYPE (DECL_NAME (decl))))
1605 class_type = TREE_TYPE (DECL_NAME (decl));
1608 /* Virtual tables have DECL_CONTEXT set to their associated class,
1609 so they are automatically handled above. */
1610 gcc_assert (TREE_CODE (decl) != VAR_DECL
1611 || !DECL_VTABLE_OR_VTT_P (decl));
1612 /* Entities not associated with any class just get the
1613 visibility specified by their attributes. */
1617 /* By default, static data members and function members receive
1618 the visibility of their containing class. */
1621 if (TARGET_DLLIMPORT_DECL_ATTRIBUTES
1622 && lookup_attribute ("dllexport", TYPE_ATTRIBUTES (class_type)))
1624 DECL_VISIBILITY (decl) = VISIBILITY_DEFAULT;
1625 DECL_VISIBILITY_SPECIFIED (decl) = 1;
1627 else if (TREE_CODE (decl) == FUNCTION_DECL
1628 && DECL_DECLARED_INLINE_P (decl)
1629 && visibility_options.inlines_hidden)
1631 /* Don't change it if it has been set explicitly by user. */
1632 if (!DECL_VISIBILITY_SPECIFIED (decl))
1634 DECL_VISIBILITY (decl) = VISIBILITY_HIDDEN;
1635 DECL_VISIBILITY_SPECIFIED (decl) = 1;
1638 else if (CLASSTYPE_VISIBILITY_SPECIFIED (class_type))
1640 DECL_VISIBILITY (decl) = CLASSTYPE_VISIBILITY (class_type);
1641 DECL_VISIBILITY_SPECIFIED (decl) = 1;
1643 else if (!DECL_VISIBILITY_SPECIFIED (decl))
1645 DECL_VISIBILITY (decl) = CLASSTYPE_VISIBILITY (class_type);
1646 DECL_VISIBILITY_SPECIFIED (decl) = 0;
1651 /* DECL is a FUNCTION_DECL or VAR_DECL. If the object file linkage
1652 for DECL has not already been determined, do so now by setting
1653 DECL_EXTERNAL, DECL_COMDAT and other related flags. Until this
1654 function is called entities with vague linkage whose definitions
1655 are available must have TREE_PUBLIC set.
1657 If this function decides to place DECL in COMDAT, it will set
1658 appropriate flags -- but will not clear DECL_EXTERNAL. It is up to
1659 the caller to decide whether or not to clear DECL_EXTERNAL. Some
1660 callers defer that decision until it is clear that DECL is actually
1664 import_export_decl (tree decl)
1669 tree class_type = NULL_TREE;
1671 if (DECL_INTERFACE_KNOWN (decl))
1674 /* We cannot determine what linkage to give to an entity with vague
1675 linkage until the end of the file. For example, a virtual table
1676 for a class will be defined if and only if the key method is
1677 defined in this translation unit. As a further example, consider
1678 that when compiling a translation unit that uses PCH file with
1679 "-frepo" it would be incorrect to make decisions about what
1680 entities to emit when building the PCH; those decisions must be
1681 delayed until the repository information has been processed. */
1682 gcc_assert (at_eof);
1683 /* Object file linkage for explicit instantiations is handled in
1684 mark_decl_instantiated. For static variables in functions with
1685 vague linkage, maybe_commonize_var is used.
1687 Therefore, the only declarations that should be provided to this
1688 function are those with external linkage that are:
1690 * implicit instantiations of function templates
1694 * implicit instantiations of static data members of class
1701 Furthermore, all entities that reach this point must have a
1702 definition available in this translation unit.
1704 The following assertions check these conditions. */
1705 gcc_assert (TREE_CODE (decl) == FUNCTION_DECL
1706 || TREE_CODE (decl) == VAR_DECL);
1707 /* Any code that creates entities with TREE_PUBLIC cleared should
1708 also set DECL_INTERFACE_KNOWN. */
1709 gcc_assert (TREE_PUBLIC (decl));
1710 if (TREE_CODE (decl) == FUNCTION_DECL)
1711 gcc_assert (DECL_IMPLICIT_INSTANTIATION (decl)
1712 || DECL_FRIEND_PSEUDO_TEMPLATE_INSTANTIATION (decl)
1713 || DECL_DECLARED_INLINE_P (decl));
1715 gcc_assert (DECL_IMPLICIT_INSTANTIATION (decl)
1716 || DECL_VTABLE_OR_VTT_P (decl)
1717 || DECL_TINFO_P (decl));
1718 /* Check that a definition of DECL is available in this translation
1720 gcc_assert (!DECL_REALLY_EXTERN (decl));
1722 /* Assume that DECL will not have COMDAT linkage. */
1724 /* Assume that DECL will not be imported into this translation
1728 /* See if the repository tells us whether or not to emit DECL in
1729 this translation unit. */
1730 emit_p = repo_emit_p (decl);
1733 else if (emit_p == 1)
1735 /* The repository indicates that this entity should be defined
1736 here. Make sure the back end honors that request. */
1737 if (TREE_CODE (decl) == VAR_DECL)
1739 else if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl)
1740 || DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P (decl))
1743 FOR_EACH_CLONE (clone, decl)
1744 mark_needed (clone);
1748 /* Output the definition as an ordinary strong definition. */
1749 DECL_EXTERNAL (decl) = 0;
1750 DECL_INTERFACE_KNOWN (decl) = 1;
1755 /* We have already decided what to do with this DECL; there is no
1756 need to check anything further. */
1758 else if (TREE_CODE (decl) == VAR_DECL && DECL_VTABLE_OR_VTT_P (decl))
1760 class_type = DECL_CONTEXT (decl);
1761 import_export_class (class_type);
1762 if (TYPE_FOR_JAVA (class_type))
1764 else if (CLASSTYPE_INTERFACE_KNOWN (class_type)
1765 && CLASSTYPE_INTERFACE_ONLY (class_type))
1767 else if ((!flag_weak || TARGET_WEAK_NOT_IN_ARCHIVE_TOC)
1768 && !CLASSTYPE_USE_TEMPLATE (class_type)
1769 && CLASSTYPE_KEY_METHOD (class_type)
1770 && !DECL_DECLARED_INLINE_P (CLASSTYPE_KEY_METHOD (class_type)))
1771 /* The ABI requires that all virtual tables be emitted with
1772 COMDAT linkage. However, on systems where COMDAT symbols
1773 don't show up in the table of contents for a static
1774 archive, or on systems without weak symbols (where we
1775 approximate COMDAT linkage by using internal linkage), the
1776 linker will report errors about undefined symbols because
1777 it will not see the virtual table definition. Therefore,
1778 in the case that we know that the virtual table will be
1779 emitted in only one translation unit, we make the virtual
1780 table an ordinary definition with external linkage. */
1781 DECL_EXTERNAL (decl) = 0;
1782 else if (CLASSTYPE_INTERFACE_KNOWN (class_type))
1784 /* CLASS_TYPE is being exported from this translation unit,
1785 so DECL should be defined here. */
1786 if (!flag_weak && CLASSTYPE_EXPLICIT_INSTANTIATION (class_type))
1787 /* If a class is declared in a header with the "extern
1788 template" extension, then it will not be instantiated,
1789 even in translation units that would normally require
1790 it. Often such classes are explicitly instantiated in
1791 one translation unit. Therefore, the explicit
1792 instantiation must be made visible to other translation
1794 DECL_EXTERNAL (decl) = 0;
1797 /* The generic C++ ABI says that class data is always
1798 COMDAT, even if there is a key function. Some
1799 variants (e.g., the ARM EABI) says that class data
1800 only has COMDAT linkage if the class data might
1801 be emitted in more than one translation unit. */
1802 if (!CLASSTYPE_KEY_METHOD (class_type)
1803 || targetm.cxx.class_data_always_comdat ())
1805 /* The ABI requires COMDAT linkage. Normally, we
1806 only emit COMDAT things when they are needed;
1807 make sure that we realize that this entity is
1814 else if (!flag_implicit_templates
1815 && CLASSTYPE_IMPLICIT_INSTANTIATION (class_type))
1820 else if (TREE_CODE (decl) == VAR_DECL && DECL_TINFO_P (decl))
1822 tree type = TREE_TYPE (DECL_NAME (decl));
1823 if (CLASS_TYPE_P (type))
1826 import_export_class (type);
1827 if (CLASSTYPE_INTERFACE_KNOWN (type)
1828 && TYPE_POLYMORPHIC_P (type)
1829 && CLASSTYPE_INTERFACE_ONLY (type)
1830 /* If -fno-rtti was specified, then we cannot be sure
1831 that RTTI information will be emitted with the
1832 virtual table of the class, so we must emit it
1833 wherever it is used. */
1838 if (CLASSTYPE_INTERFACE_KNOWN (type)
1839 && !CLASSTYPE_INTERFACE_ONLY (type))
1841 comdat_p = targetm.cxx.class_data_always_comdat ();
1846 DECL_EXTERNAL (decl) = 0;
1856 else if (DECL_TEMPLATE_INSTANTIATION (decl)
1857 || DECL_FRIEND_PSEUDO_TEMPLATE_INSTANTIATION (decl))
1859 /* DECL is an implicit instantiation of a function or static
1861 if (flag_implicit_templates
1862 || (flag_implicit_inline_templates
1863 && TREE_CODE (decl) == FUNCTION_DECL
1864 && DECL_DECLARED_INLINE_P (decl)))
1867 /* If we are not implicitly generating templates, then mark
1868 this entity as undefined in this translation unit. */
1871 else if (DECL_FUNCTION_MEMBER_P (decl))
1873 if (!DECL_DECLARED_INLINE_P (decl))
1875 tree ctype = DECL_CONTEXT (decl);
1876 import_export_class (ctype);
1877 if (CLASSTYPE_INTERFACE_KNOWN (ctype))
1879 DECL_NOT_REALLY_EXTERN (decl)
1880 = ! (CLASSTYPE_INTERFACE_ONLY (ctype)
1881 || (DECL_DECLARED_INLINE_P (decl)
1882 && ! flag_implement_inlines
1883 && !DECL_VINDEX (decl)));
1885 if (!DECL_NOT_REALLY_EXTERN (decl))
1886 DECL_EXTERNAL (decl) = 1;
1888 /* Always make artificials weak. */
1889 if (DECL_ARTIFICIAL (decl) && flag_weak)
1892 maybe_make_one_only (decl);
1903 /* If we are importing DECL into this translation unit, mark is
1904 an undefined here. */
1905 DECL_EXTERNAL (decl) = 1;
1906 DECL_NOT_REALLY_EXTERN (decl) = 0;
1910 /* If we decided to put DECL in COMDAT, mark it accordingly at
1912 comdat_linkage (decl);
1915 /* Give the target a chance to override the visibility associated
1917 if (TREE_CODE (decl) == VAR_DECL
1918 && (DECL_TINFO_P (decl)
1919 || (DECL_VTABLE_OR_VTT_P (decl)
1920 /* Construction virtual tables are not exported because
1921 they cannot be referred to from other object files;
1922 their name is not standardized by the ABI. */
1923 && !DECL_CONSTRUCTION_VTABLE_P (decl)))
1924 && TREE_PUBLIC (decl)
1925 && !DECL_REALLY_EXTERN (decl)
1926 && DECL_VISIBILITY_SPECIFIED (decl)
1927 && (!class_type || !CLASSTYPE_VISIBILITY_SPECIFIED (class_type)))
1928 targetm.cxx.determine_class_data_visibility (decl);
1930 DECL_INTERFACE_KNOWN (decl) = 1;
1933 /* Return an expression that performs the destruction of DECL, which
1934 must be a VAR_DECL whose type has a non-trivial destructor, or is
1935 an array whose (innermost) elements have a non-trivial destructor. */
1938 build_cleanup (tree decl)
1941 tree type = TREE_TYPE (decl);
1943 /* This function should only be called for declarations that really
1944 require cleanups. */
1945 gcc_assert (!TYPE_HAS_TRIVIAL_DESTRUCTOR (type));
1947 /* Treat all objects with destructors as used; the destructor may do
1948 something substantive. */
1951 if (TREE_CODE (type) == ARRAY_TYPE)
1955 cxx_mark_addressable (decl);
1956 temp = build1 (ADDR_EXPR, build_pointer_type (type), decl);
1958 temp = build_delete (TREE_TYPE (temp), temp,
1959 sfk_complete_destructor,
1960 LOOKUP_NORMAL|LOOKUP_NONVIRTUAL|LOOKUP_DESTRUCTOR, 0);
1964 /* Returns the initialization guard variable for the variable DECL,
1965 which has static storage duration. */
1968 get_guard (tree decl)
1973 sname = mangle_guard_variable (decl);
1974 guard = IDENTIFIER_GLOBAL_VALUE (sname);
1979 /* We use a type that is big enough to contain a mutex as well
1980 as an integer counter. */
1981 guard_type = targetm.cxx.guard_type ();
1982 guard = build_decl (VAR_DECL, sname, guard_type);
1984 /* The guard should have the same linkage as what it guards. */
1985 TREE_PUBLIC (guard) = TREE_PUBLIC (decl);
1986 TREE_STATIC (guard) = TREE_STATIC (decl);
1987 DECL_COMMON (guard) = DECL_COMMON (decl);
1988 DECL_ONE_ONLY (guard) = DECL_ONE_ONLY (decl);
1989 if (TREE_PUBLIC (decl))
1990 DECL_WEAK (guard) = DECL_WEAK (decl);
1992 DECL_ARTIFICIAL (guard) = 1;
1993 DECL_IGNORED_P (guard) = 1;
1994 TREE_USED (guard) = 1;
1995 pushdecl_top_level_and_finish (guard, NULL_TREE);
2000 /* Return those bits of the GUARD variable that should be set when the
2001 guarded entity is actually initialized. */
2004 get_guard_bits (tree guard)
2006 if (!targetm.cxx.guard_mask_bit ())
2008 /* We only set the first byte of the guard, in order to leave room
2009 for a mutex in the high-order bits. */
2010 guard = build1 (ADDR_EXPR,
2011 build_pointer_type (TREE_TYPE (guard)),
2013 guard = build1 (NOP_EXPR,
2014 build_pointer_type (char_type_node),
2016 guard = build1 (INDIRECT_REF, char_type_node, guard);
2022 /* Return an expression which determines whether or not the GUARD
2023 variable has already been initialized. */
2026 get_guard_cond (tree guard)
2030 /* Check to see if the GUARD is zero. */
2031 guard = get_guard_bits (guard);
2033 /* Mask off all but the low bit. */
2034 if (targetm.cxx.guard_mask_bit ())
2036 guard_value = integer_one_node;
2037 if (!same_type_p (TREE_TYPE (guard_value), TREE_TYPE (guard)))
2038 guard_value = convert (TREE_TYPE (guard), guard_value);
2039 guard = cp_build_binary_op (BIT_AND_EXPR, guard, guard_value);
2042 guard_value = integer_zero_node;
2043 if (!same_type_p (TREE_TYPE (guard_value), TREE_TYPE (guard)))
2044 guard_value = convert (TREE_TYPE (guard), guard_value);
2045 return cp_build_binary_op (EQ_EXPR, guard, guard_value);
2048 /* Return an expression which sets the GUARD variable, indicating that
2049 the variable being guarded has been initialized. */
2052 set_guard (tree guard)
2056 /* Set the GUARD to one. */
2057 guard = get_guard_bits (guard);
2058 guard_init = integer_one_node;
2059 if (!same_type_p (TREE_TYPE (guard_init), TREE_TYPE (guard)))
2060 guard_init = convert (TREE_TYPE (guard), guard_init);
2061 return build_modify_expr (guard, NOP_EXPR, guard_init);
2064 /* Start the process of running a particular set of global constructors
2065 or destructors. Subroutine of do_[cd]tors. */
2068 start_objects (int method_type, int initp)
2074 /* Make ctor or dtor function. METHOD_TYPE may be 'I' or 'D'. */
2076 if (initp != DEFAULT_INIT_PRIORITY)
2086 sprintf (type, "%c%c%.5u", method_type, joiner, initp);
2089 sprintf (type, "%c", method_type);
2091 fndecl = build_lang_decl (FUNCTION_DECL,
2092 get_file_function_name_long (type),
2093 build_function_type (void_type_node,
2095 start_preparsed_function (fndecl, /*attrs=*/NULL_TREE, SF_PRE_PARSED);
2097 /* It can be a static function as long as collect2 does not have
2098 to scan the object file to find its ctor/dtor routine. */
2099 TREE_PUBLIC (current_function_decl) = ! targetm.have_ctors_dtors;
2101 /* Mark this declaration as used to avoid spurious warnings. */
2102 TREE_USED (current_function_decl) = 1;
2104 /* Mark this function as a global constructor or destructor. */
2105 if (method_type == 'I')
2106 DECL_GLOBAL_CTOR_P (current_function_decl) = 1;
2108 DECL_GLOBAL_DTOR_P (current_function_decl) = 1;
2109 DECL_LANG_SPECIFIC (current_function_decl)->decl_flags.u2sel = 1;
2111 body = begin_compound_stmt (BCS_FN_BODY);
2113 /* We cannot allow these functions to be elided, even if they do not
2114 have external linkage. And, there's no point in deferring
2115 compilation of thes functions; they're all going to have to be
2117 DECL_INLINE (current_function_decl) = 0;
2118 DECL_UNINLINABLE (current_function_decl) = 1;
2123 /* Finish the process of running a particular set of global constructors
2124 or destructors. Subroutine of do_[cd]tors. */
2127 finish_objects (int method_type, int initp, tree body)
2132 finish_compound_stmt (body);
2133 fn = finish_function (0);
2134 expand_or_defer_fn (fn);
2136 /* When only doing semantic analysis, and no RTL generation, we
2137 can't call functions that directly emit assembly code; there is
2138 no assembly file in which to put the code. */
2139 if (flag_syntax_only)
2142 if (targetm.have_ctors_dtors)
2144 rtx fnsym = XEXP (DECL_RTL (fn), 0);
2145 cgraph_mark_needed_node (cgraph_node (fn));
2146 if (method_type == 'I')
2147 (* targetm.asm_out.constructor) (fnsym, initp);
2149 (* targetm.asm_out.destructor) (fnsym, initp);
2153 /* The names of the parameters to the function created to handle
2154 initializations and destructions for objects with static storage
2156 #define INITIALIZE_P_IDENTIFIER "__initialize_p"
2157 #define PRIORITY_IDENTIFIER "__priority"
2159 /* The name of the function we create to handle initializations and
2160 destructions for objects with static storage duration. */
2161 #define SSDF_IDENTIFIER "__static_initialization_and_destruction"
2163 /* The declaration for the __INITIALIZE_P argument. */
2164 static GTY(()) tree initialize_p_decl;
2166 /* The declaration for the __PRIORITY argument. */
2167 static GTY(()) tree priority_decl;
2169 /* The declaration for the static storage duration function. */
2170 static GTY(()) tree ssdf_decl;
2172 /* All the static storage duration functions created in this
2173 translation unit. */
2174 static GTY(()) VEC(tree,gc) *ssdf_decls;
2176 /* A map from priority levels to information about that priority
2177 level. There may be many such levels, so efficient lookup is
2179 static splay_tree priority_info_map;
2181 /* Begins the generation of the function that will handle all
2182 initialization and destruction of objects with static storage
2183 duration. The function generated takes two parameters of type
2184 `int': __INITIALIZE_P and __PRIORITY. If __INITIALIZE_P is
2185 nonzero, it performs initializations. Otherwise, it performs
2186 destructions. It only performs those initializations or
2187 destructions with the indicated __PRIORITY. The generated function
2190 It is assumed that this function will only be called once per
2191 translation unit. */
2194 start_static_storage_duration_function (unsigned count)
2199 char id[sizeof (SSDF_IDENTIFIER) + 1 /* '\0' */ + 32];
2201 /* Create the identifier for this function. It will be of the form
2202 SSDF_IDENTIFIER_<number>. */
2203 sprintf (id, "%s_%u", SSDF_IDENTIFIER, count);
2205 /* Create the parameters. */
2206 parm_types = void_list_node;
2207 parm_types = tree_cons (NULL_TREE, integer_type_node, parm_types);
2208 parm_types = tree_cons (NULL_TREE, integer_type_node, parm_types);
2209 type = build_function_type (void_type_node, parm_types);
2211 /* Create the FUNCTION_DECL itself. */
2212 ssdf_decl = build_lang_decl (FUNCTION_DECL,
2213 get_identifier (id),
2215 TREE_PUBLIC (ssdf_decl) = 0;
2216 DECL_ARTIFICIAL (ssdf_decl) = 1;
2218 /* Put this function in the list of functions to be called from the
2219 static constructors and destructors. */
2222 ssdf_decls = VEC_alloc (tree, gc, 32);
2224 /* Take this opportunity to initialize the map from priority
2225 numbers to information about that priority level. */
2226 priority_info_map = splay_tree_new (splay_tree_compare_ints,
2227 /*delete_key_fn=*/0,
2228 /*delete_value_fn=*/
2229 (splay_tree_delete_value_fn) &free);
2231 /* We always need to generate functions for the
2232 DEFAULT_INIT_PRIORITY so enter it now. That way when we walk
2233 priorities later, we'll be sure to find the
2234 DEFAULT_INIT_PRIORITY. */
2235 get_priority_info (DEFAULT_INIT_PRIORITY);
2238 VEC_safe_push (tree, gc, ssdf_decls, ssdf_decl);
2240 /* Create the argument list. */
2241 initialize_p_decl = cp_build_parm_decl
2242 (get_identifier (INITIALIZE_P_IDENTIFIER), integer_type_node);
2243 DECL_CONTEXT (initialize_p_decl) = ssdf_decl;
2244 TREE_USED (initialize_p_decl) = 1;
2245 priority_decl = cp_build_parm_decl
2246 (get_identifier (PRIORITY_IDENTIFIER), integer_type_node);
2247 DECL_CONTEXT (priority_decl) = ssdf_decl;
2248 TREE_USED (priority_decl) = 1;
2250 TREE_CHAIN (initialize_p_decl) = priority_decl;
2251 DECL_ARGUMENTS (ssdf_decl) = initialize_p_decl;
2253 /* Put the function in the global scope. */
2254 pushdecl (ssdf_decl);
2256 /* Start the function itself. This is equivalent to declaring the
2259 static void __ssdf (int __initialize_p, init __priority_p);
2261 It is static because we only need to call this function from the
2262 various constructor and destructor functions for this module. */
2263 start_preparsed_function (ssdf_decl,
2264 /*attrs=*/NULL_TREE,
2267 /* Set up the scope of the outermost block in the function. */
2268 body = begin_compound_stmt (BCS_FN_BODY);
2270 /* This function must not be deferred because we are depending on
2271 its compilation to tell us what is TREE_SYMBOL_REFERENCED. */
2272 DECL_INLINE (ssdf_decl) = 0;
2273 DECL_UNINLINABLE (ssdf_decl) = 1;
2278 /* Finish the generation of the function which performs initialization
2279 and destruction of objects with static storage duration. After
2280 this point, no more such objects can be created. */
2283 finish_static_storage_duration_function (tree body)
2285 /* Close out the function. */
2286 finish_compound_stmt (body);
2287 expand_or_defer_fn (finish_function (0));
2290 /* Return the information about the indicated PRIORITY level. If no
2291 code to handle this level has yet been generated, generate the
2292 appropriate prologue. */
2294 static priority_info
2295 get_priority_info (int priority)
2300 n = splay_tree_lookup (priority_info_map,
2301 (splay_tree_key) priority);
2304 /* Create a new priority information structure, and insert it
2306 pi = xmalloc (sizeof (struct priority_info_s));
2307 pi->initializations_p = 0;
2308 pi->destructions_p = 0;
2309 splay_tree_insert (priority_info_map,
2310 (splay_tree_key) priority,
2311 (splay_tree_value) pi);
2314 pi = (priority_info) n->value;
2319 /* Set up to handle the initialization or destruction of DECL. If
2320 INITP is nonzero, we are initializing the variable. Otherwise, we
2321 are destroying it. */
2324 start_static_initialization_or_destruction (tree decl, int initp)
2326 tree guard_if_stmt = NULL_TREE;
2333 /* Figure out the priority for this declaration. */
2334 if (DECL_HAS_INIT_PRIORITY_P (decl))
2335 priority = DECL_INIT_PRIORITY (decl);
2337 priority = DEFAULT_INIT_PRIORITY;
2339 /* Remember that we had an initialization or finalization at this
2341 pi = get_priority_info (priority);
2343 pi->initializations_p = 1;
2345 pi->destructions_p = 1;
2347 /* Trick the compiler into thinking we are at the file and line
2348 where DECL was declared so that error-messages make sense, and so
2349 that the debugger will show somewhat sensible file and line
2351 input_location = DECL_SOURCE_LOCATION (decl);
2357 Access control for implicit calls to the constructors,
2358 the conversion functions, or the destructor called to
2359 create and destroy a static data member is performed as
2360 if these calls appeared in the scope of the member's
2363 we pretend we are in a static member function of the class of
2364 which the DECL is a member. */
2365 if (member_p (decl))
2367 DECL_CONTEXT (current_function_decl) = DECL_CONTEXT (decl);
2368 DECL_STATIC_FUNCTION_P (current_function_decl) = 1;
2371 /* Conditionalize this initialization on being in the right priority
2372 and being initializing/finalizing appropriately. */
2373 guard_if_stmt = begin_if_stmt ();
2374 cond = cp_build_binary_op (EQ_EXPR,
2376 build_int_cst (NULL_TREE, priority));
2377 init_cond = initp ? integer_one_node : integer_zero_node;
2378 init_cond = cp_build_binary_op (EQ_EXPR,
2381 cond = cp_build_binary_op (TRUTH_ANDIF_EXPR, cond, init_cond);
2383 /* Assume we don't need a guard. */
2385 /* We need a guard if this is an object with external linkage that
2386 might be initialized in more than one place. (For example, a
2387 static data member of a template, when the data member requires
2389 if (TREE_PUBLIC (decl) && (DECL_COMMON (decl)
2390 || DECL_ONE_ONLY (decl)
2391 || DECL_WEAK (decl)))
2395 guard = get_guard (decl);
2397 /* When using __cxa_atexit, we just check the GUARD as we would
2398 for a local static. */
2399 if (flag_use_cxa_atexit)
2401 /* When using __cxa_atexit, we never try to destroy
2402 anything from a static destructor. */
2404 guard_cond = get_guard_cond (guard);
2406 /* If we don't have __cxa_atexit, then we will be running
2407 destructors from .fini sections, or their equivalents. So,
2408 we need to know how many times we've tried to initialize this
2409 object. We do initializations only if the GUARD is zero,
2410 i.e., if we are the first to initialize the variable. We do
2411 destructions only if the GUARD is one, i.e., if we are the
2412 last to destroy the variable. */
2415 = cp_build_binary_op (EQ_EXPR,
2416 build_unary_op (PREINCREMENT_EXPR,
2422 = cp_build_binary_op (EQ_EXPR,
2423 build_unary_op (PREDECREMENT_EXPR,
2428 cond = cp_build_binary_op (TRUTH_ANDIF_EXPR, cond, guard_cond);
2431 finish_if_stmt_cond (cond, guard_if_stmt);
2433 /* If we're using __cxa_atexit, we have not already set the GUARD,
2434 so we must do so now. */
2435 if (guard && initp && flag_use_cxa_atexit)
2436 finish_expr_stmt (set_guard (guard));
2438 return guard_if_stmt;
2441 /* We've just finished generating code to do an initialization or
2442 finalization. GUARD_IF_STMT is the if-statement we used to guard
2443 the initialization. */
2446 finish_static_initialization_or_destruction (tree guard_if_stmt)
2448 finish_then_clause (guard_if_stmt);
2449 finish_if_stmt (guard_if_stmt);
2451 /* Now that we're done with DECL we don't need to pretend to be a
2452 member of its class any longer. */
2453 DECL_CONTEXT (current_function_decl) = NULL_TREE;
2454 DECL_STATIC_FUNCTION_P (current_function_decl) = 0;
2457 /* Generate code to do the initialization of DECL, a VAR_DECL with
2458 static storage duration. The initialization is INIT. */
2461 do_static_initialization (tree decl, tree init)
2465 /* Set up for the initialization. */
2467 = start_static_initialization_or_destruction (decl,
2470 /* Perform the initialization. */
2472 finish_expr_stmt (init);
2474 /* If we're using __cxa_atexit, register a function that calls the
2475 destructor for the object. */
2476 if (flag_use_cxa_atexit)
2477 finish_expr_stmt (register_dtor_fn (decl));
2480 finish_static_initialization_or_destruction (guard_if_stmt);
2483 /* Generate code to do the static destruction of DECL. If DECL may be
2484 initialized more than once in different object files, GUARD is the
2485 guard variable to check. PRIORITY is the priority for the
2489 do_static_destruction (tree decl)
2493 /* If we're using __cxa_atexit, then destructors are registered
2494 immediately after objects are initialized. */
2495 gcc_assert (!flag_use_cxa_atexit);
2497 /* If we don't need a destructor, there's nothing to do. */
2498 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
2501 /* Actually do the destruction. */
2502 guard_if_stmt = start_static_initialization_or_destruction (decl,
2504 finish_expr_stmt (build_cleanup (decl));
2505 finish_static_initialization_or_destruction (guard_if_stmt);
2508 /* VARS is a list of variables with static storage duration which may
2509 need initialization and/or finalization. Remove those variables
2510 that don't really need to be initialized or finalized, and return
2511 the resulting list. The order in which the variables appear in
2512 VARS is in reverse order of the order in which they should actually
2513 be initialized. The list we return is in the unreversed order;
2514 i.e., the first variable should be initialized first. */
2517 prune_vars_needing_no_initialization (tree *vars)
2520 tree result = NULL_TREE;
2525 tree decl = TREE_VALUE (t);
2526 tree init = TREE_PURPOSE (t);
2528 /* Deal gracefully with error. */
2529 if (decl == error_mark_node)
2531 var = &TREE_CHAIN (t);
2535 /* The only things that can be initialized are variables. */
2536 gcc_assert (TREE_CODE (decl) == VAR_DECL);
2538 /* If this object is not defined, we don't need to do anything
2540 if (DECL_EXTERNAL (decl))
2542 var = &TREE_CHAIN (t);
2546 /* Also, if the initializer already contains errors, we can bail
2548 if (init && TREE_CODE (init) == TREE_LIST
2549 && value_member (error_mark_node, init))
2551 var = &TREE_CHAIN (t);
2555 /* This variable is going to need initialization and/or
2556 finalization, so we add it to the list. */
2557 *var = TREE_CHAIN (t);
2558 TREE_CHAIN (t) = result;
2565 /* Make sure we have told the back end about all the variables in
2569 write_out_vars (tree vars)
2573 for (v = vars; v; v = TREE_CHAIN (v))
2575 tree var = TREE_VALUE (v);
2576 if (!var_finalized_p (var))
2578 import_export_decl (var);
2579 rest_of_decl_compilation (var, 1, 1);
2584 /* Generate a static constructor (if CONSTRUCTOR_P) or destructor
2585 (otherwise) that will initialize all gobal objects with static
2586 storage duration having the indicated PRIORITY. */
2589 generate_ctor_or_dtor_function (bool constructor_p, int priority,
2598 input_location = *locus;
2599 #ifdef USE_MAPPED_LOCATION
2605 /* We use `I' to indicate initialization and `D' to indicate
2607 function_key = constructor_p ? 'I' : 'D';
2609 /* We emit the function lazily, to avoid generating empty
2610 global constructors and destructors. */
2613 /* For Objective-C++, we may need to initialize metadata found in this module.
2614 This must be done _before_ any other static initializations. */
2615 if (c_dialect_objc () && (priority == DEFAULT_INIT_PRIORITY)
2616 && constructor_p && objc_static_init_needed_p ())
2618 body = start_objects (function_key, priority);
2619 static_ctors = objc_generate_static_init_call (static_ctors);
2622 /* Call the static storage duration function with appropriate
2624 for (i = 0; VEC_iterate (tree, ssdf_decls, i, fndecl); ++i)
2626 /* Calls to pure or const functions will expand to nothing. */
2627 if (! (flags_from_decl_or_type (fndecl) & (ECF_CONST | ECF_PURE)))
2630 body = start_objects (function_key, priority);
2632 arguments = tree_cons (NULL_TREE,
2633 build_int_cst (NULL_TREE, priority),
2635 arguments = tree_cons (NULL_TREE,
2636 build_int_cst (NULL_TREE, constructor_p),
2638 finish_expr_stmt (build_function_call (fndecl, arguments));
2642 /* If we're generating code for the DEFAULT_INIT_PRIORITY, throw in
2643 calls to any functions marked with attributes indicating that
2644 they should be called at initialization- or destruction-time. */
2645 if (priority == DEFAULT_INIT_PRIORITY)
2649 for (fns = constructor_p ? static_ctors : static_dtors;
2651 fns = TREE_CHAIN (fns))
2653 fndecl = TREE_VALUE (fns);
2655 /* Calls to pure/const functions will expand to nothing. */
2656 if (! (flags_from_decl_or_type (fndecl) & (ECF_CONST | ECF_PURE)))
2659 body = start_objects (function_key, priority);
2660 finish_expr_stmt (build_function_call (fndecl, NULL_TREE));
2665 /* Close out the function. */
2667 finish_objects (function_key, priority, body);
2670 /* Generate constructor and destructor functions for the priority
2674 generate_ctor_and_dtor_functions_for_priority (splay_tree_node n, void * data)
2676 location_t *locus = data;
2677 int priority = (int) n->key;
2678 priority_info pi = (priority_info) n->value;
2680 /* Generate the functions themselves, but only if they are really
2682 if (pi->initializations_p
2683 || (priority == DEFAULT_INIT_PRIORITY && static_ctors))
2684 generate_ctor_or_dtor_function (/*constructor_p=*/true, priority, locus);
2685 if (pi->destructions_p
2686 || (priority == DEFAULT_INIT_PRIORITY && static_dtors))
2687 generate_ctor_or_dtor_function (/*constructor_p=*/false, priority, locus);
2689 /* Keep iterating. */
2693 /* Called via LANGHOOK_CALLGRAPH_ANALYZE_EXPR. It is supposed to mark
2694 decls referenced from frontend specific constructs; it will be called
2695 only for language-specific tree nodes.
2697 Here we must deal with member pointers. */
2700 cxx_callgraph_analyze_expr (tree *tp, int *walk_subtrees ATTRIBUTE_UNUSED,
2701 tree from ATTRIBUTE_UNUSED)
2705 switch (TREE_CODE (t))
2708 if (TYPE_PTRMEMFUNC_P (TREE_TYPE (t)))
2709 cgraph_mark_needed_node (cgraph_node (PTRMEM_CST_MEMBER (t)));
2712 if (TREE_CODE (BASELINK_FUNCTIONS (t)) == FUNCTION_DECL)
2713 cgraph_mark_needed_node (cgraph_node (BASELINK_FUNCTIONS (t)));
2716 if (DECL_VTABLE_OR_VTT_P (t))
2718 /* The ABI requires that all virtual tables be emitted
2719 whenever one of them is. */
2721 for (vtbl = CLASSTYPE_VTABLES (DECL_CONTEXT (t));
2723 vtbl = TREE_CHAIN (vtbl))
2724 mark_decl_referenced (vtbl);
2726 else if (DECL_CONTEXT (t)
2727 && TREE_CODE (DECL_CONTEXT (t)) == FUNCTION_DECL)
2728 /* If we need a static variable in a function, then we
2729 need the containing function. */
2730 mark_decl_referenced (DECL_CONTEXT (t));
2739 /* Java requires that we be able to reference a local address for a
2740 method, and not be confused by PLT entries. If hidden aliases are
2741 supported, emit one for each java function that we've emitted. */
2744 build_java_method_aliases (void)
2746 struct cgraph_node *node;
2748 #ifndef HAVE_GAS_HIDDEN
2752 for (node = cgraph_nodes; node ; node = node->next)
2754 tree fndecl = node->decl;
2756 if (TREE_ASM_WRITTEN (fndecl)
2757 && DECL_CONTEXT (fndecl)
2758 && TYPE_P (DECL_CONTEXT (fndecl))
2759 && TYPE_FOR_JAVA (DECL_CONTEXT (fndecl))
2760 && TARGET_USE_LOCAL_THUNK_ALIAS_P (fndecl))
2762 /* Mangle the name in a predictable way; we need to reference
2763 this from a java compiled object file. */
2764 tree oid, nid, alias;
2768 oid = DECL_ASSEMBLER_NAME (fndecl);
2769 oname = IDENTIFIER_POINTER (oid);
2770 gcc_assert (oname[0] == '_' && oname[1] == 'Z');
2771 nname = ACONCAT (("_ZGA", oname+2, NULL));
2772 nid = get_identifier (nname);
2774 alias = make_alias_for (fndecl, nid);
2775 TREE_PUBLIC (alias) = 1;
2776 DECL_VISIBILITY (alias) = VISIBILITY_HIDDEN;
2778 assemble_alias (alias, oid);
2783 /* This routine is called from the last rule in yyparse ().
2784 Its job is to create all the code needed to initialize and
2785 destroy the global aggregates. We do the destruction
2786 first, since that way we only need to reverse the decls once. */
2789 cp_finish_file (void)
2795 unsigned ssdf_count = 0;
2799 locus = input_location;
2802 /* Bad parse errors. Just forget about it. */
2803 if (! global_bindings_p () || current_class_type || decl_namespace_list)
2807 c_common_write_pch ();
2809 #ifdef USE_MAPPED_LOCATION
2812 /* Otherwise, GDB can get confused, because in only knows
2813 about source for LINENO-1 lines. */
2817 /* We now have to write out all the stuff we put off writing out.
2820 o Template specializations that we have not yet instantiated,
2821 but which are needed.
2822 o Initialization and destruction for non-local objects with
2823 static storage duration. (Local objects with static storage
2824 duration are initialized when their scope is first entered,
2825 and are cleaned up via atexit.)
2826 o Virtual function tables.
2828 All of these may cause others to be needed. For example,
2829 instantiating one function may cause another to be needed, and
2830 generating the initializer for an object may cause templates to be
2831 instantiated, etc., etc. */
2833 timevar_push (TV_VARCONST);
2835 emit_support_tinfos ();
2844 /* If there are templates that we've put off instantiating, do
2846 instantiate_pending_templates (retries);
2849 /* Write out virtual tables as required. Note that writing out
2850 the virtual table for a template class may cause the
2851 instantiation of members of that class. If we write out
2852 vtables then we remove the class from our list so we don't
2853 have to look at it again. */
2855 while (keyed_classes != NULL_TREE
2856 && maybe_emit_vtables (TREE_VALUE (keyed_classes)))
2859 keyed_classes = TREE_CHAIN (keyed_classes);
2865 tree next = TREE_CHAIN (t);
2869 if (maybe_emit_vtables (TREE_VALUE (next)))
2872 TREE_CHAIN (t) = TREE_CHAIN (next);
2877 next = TREE_CHAIN (t);
2881 /* Write out needed type info variables. We have to be careful
2882 looping through unemitted decls, because emit_tinfo_decl may
2883 cause other variables to be needed. New elements will be
2884 appended, and we remove from the vector those that actually
2886 for (i = VEC_length (tree, unemitted_tinfo_decls);
2887 VEC_iterate (tree, unemitted_tinfo_decls, --i, t);)
2888 if (emit_tinfo_decl (t))
2891 VEC_unordered_remove (tree, unemitted_tinfo_decls, i);
2894 /* The list of objects with static storage duration is built up
2895 in reverse order. We clear STATIC_AGGREGATES so that any new
2896 aggregates added during the initialization of these will be
2897 initialized in the correct order when we next come around the
2899 vars = prune_vars_needing_no_initialization (&static_aggregates);
2905 /* We need to start a new initialization function each time
2906 through the loop. That's because we need to know which
2907 vtables have been referenced, and TREE_SYMBOL_REFERENCED
2908 isn't computed until a function is finished, and written
2909 out. That's a deficiency in the back-end. When this is
2910 fixed, these initialization functions could all become
2911 inline, with resulting performance improvements. */
2914 /* Set the line and file, so that it is obviously not from
2916 input_location = locus;
2917 ssdf_body = start_static_storage_duration_function (ssdf_count);
2919 /* Make sure the back end knows about all the variables. */
2920 write_out_vars (vars);
2922 /* First generate code to do all the initializations. */
2923 for (v = vars; v; v = TREE_CHAIN (v))
2924 do_static_initialization (TREE_VALUE (v),
2927 /* Then, generate code to do all the destructions. Do these
2928 in reverse order so that the most recently constructed
2929 variable is the first destroyed. If we're using
2930 __cxa_atexit, then we don't need to do this; functions
2931 were registered at initialization time to destroy the
2933 if (!flag_use_cxa_atexit)
2935 vars = nreverse (vars);
2936 for (v = vars; v; v = TREE_CHAIN (v))
2937 do_static_destruction (TREE_VALUE (v));
2942 /* Finish up the static storage duration function for this
2944 input_location = locus;
2945 finish_static_storage_duration_function (ssdf_body);
2947 /* All those initializations and finalizations might cause
2948 us to need more inline functions, more template
2949 instantiations, etc. */
2952 #ifdef USE_MAPPED_LOCATION
2959 /* Go through the set of inline functions whose bodies have not
2960 been emitted yet. If out-of-line copies of these functions
2961 are required, emit them. */
2962 for (i = 0; VEC_iterate (tree, deferred_fns, i, decl); ++i)
2964 /* Does it need synthesizing? */
2965 if (DECL_ARTIFICIAL (decl) && ! DECL_INITIAL (decl)
2966 && (! DECL_REALLY_EXTERN (decl) || DECL_INLINE (decl)))
2968 /* Even though we're already at the top-level, we push
2969 there again. That way, when we pop back a few lines
2970 hence, all of our state is restored. Otherwise,
2971 finish_function doesn't clean things up, and we end
2972 up with CURRENT_FUNCTION_DECL set. */
2973 push_to_top_level ();
2974 /* The decl's location will mark where it was first
2975 needed. Save that so synthesize method can indicate
2976 where it was needed from, in case of error */
2977 input_location = DECL_SOURCE_LOCATION (decl);
2978 synthesize_method (decl);
2979 pop_from_top_level ();
2983 if (!DECL_SAVED_TREE (decl))
2986 /* We lie to the back-end, pretending that some functions
2987 are not defined when they really are. This keeps these
2988 functions from being put out unnecessarily. But, we must
2989 stop lying when the functions are referenced, or if they
2990 are not comdat since they need to be put out now. If
2991 DECL_INTERFACE_KNOWN, then we have already set
2992 DECL_EXTERNAL appropriately, so there's no need to check
2993 again, and we do not want to clear DECL_EXTERNAL if a
2994 previous call to import_export_decl set it.
2996 This is done in a separate for cycle, because if some
2997 deferred function is contained in another deferred
2998 function later in deferred_fns varray,
2999 rest_of_compilation would skip this function and we
3000 really cannot expand the same function twice. */
3001 import_export_decl (decl);
3002 if (DECL_NOT_REALLY_EXTERN (decl)
3003 && DECL_INITIAL (decl)
3004 && decl_needed_p (decl))
3005 DECL_EXTERNAL (decl) = 0;
3007 /* If we're going to need to write this function out, and
3008 there's already a body for it, create RTL for it now.
3009 (There might be no body if this is a method we haven't
3010 gotten around to synthesizing yet.) */
3011 if (!DECL_EXTERNAL (decl)
3012 && decl_needed_p (decl)
3013 && !TREE_ASM_WRITTEN (decl)
3014 && !cgraph_node (decl)->local.finalized)
3016 /* We will output the function; no longer consider it in this
3018 DECL_DEFER_OUTPUT (decl) = 0;
3019 /* Generate RTL for this function now that we know we
3021 expand_or_defer_fn (decl);
3022 /* If we're compiling -fsyntax-only pretend that this
3023 function has been written out so that we don't try to
3025 if (flag_syntax_only)
3026 TREE_ASM_WRITTEN (decl) = 1;
3031 if (walk_namespaces (wrapup_globals_for_namespace, /*data=*/0))
3034 /* Static data members are just like namespace-scope globals. */
3035 for (i = 0; VEC_iterate (tree, pending_statics, i, decl); ++i)
3037 if (var_finalized_p (decl) || DECL_REALLY_EXTERN (decl))
3039 import_export_decl (decl);
3040 /* If this static data member is needed, provide it to the
3042 if (DECL_NOT_REALLY_EXTERN (decl) && decl_needed_p (decl))
3043 DECL_EXTERNAL (decl) = 0;
3045 if (VEC_length (tree, pending_statics) != 0
3046 && wrapup_global_declarations (VEC_address (tree, pending_statics),
3047 VEC_length (tree, pending_statics)))
3054 /* All used inline functions must have a definition at this point. */
3055 for (i = 0; VEC_iterate (tree, deferred_fns, i, decl); ++i)
3057 if (/* Check online inline functions that were actually used. */
3058 TREE_USED (decl) && DECL_DECLARED_INLINE_P (decl)
3059 /* But not defined. */
3060 && DECL_REALLY_EXTERN (decl)
3061 /* If the definition actually was available here, then the
3062 fact that the function was not defined merely represents
3063 that for some reason (use of a template repository,
3064 #pragma interface, etc.) we decided not to emit the
3066 && !DECL_INITIAL (decl)
3067 /* An explicit instantiation can be used to specify
3068 that the body is in another unit. It will have
3069 already verified there was a definition. */
3070 && !DECL_EXPLICIT_INSTANTIATION (decl))
3072 warning (0, "inline function %q+D used but never defined", decl);
3073 /* This symbol is effectively an "extern" declaration now.
3074 This is not strictly necessary, but removes a duplicate
3076 TREE_PUBLIC (decl) = 1;
3080 /* We give C linkage to static constructors and destructors. */
3081 push_lang_context (lang_name_c);
3083 /* Generate initialization and destruction functions for all
3084 priorities for which they are required. */
3085 if (priority_info_map)
3086 splay_tree_foreach (priority_info_map,
3087 generate_ctor_and_dtor_functions_for_priority,
3091 /* If we have a ctor or this is obj-c++ and we need a static init,
3092 call generate_ctor_or_dtor_function. */
3093 if (static_ctors || (c_dialect_objc () && objc_static_init_needed_p ()))
3094 generate_ctor_or_dtor_function (/*constructor_p=*/true,
3095 DEFAULT_INIT_PRIORITY, &locus);
3097 generate_ctor_or_dtor_function (/*constructor_p=*/false,
3098 DEFAULT_INIT_PRIORITY, &locus);
3101 /* We're done with the splay-tree now. */
3102 if (priority_info_map)
3103 splay_tree_delete (priority_info_map);
3105 /* Generate any missing aliases. */
3106 maybe_apply_pending_pragma_weaks ();
3108 /* We're done with static constructors, so we can go back to "C++"
3110 pop_lang_context ();
3112 cgraph_finalize_compilation_unit ();
3115 /* Now, issue warnings about static, but not defined, functions,
3116 etc., and emit debugging information. */
3117 walk_namespaces (wrapup_globals_for_namespace, /*data=*/&reconsider);
3118 if (VEC_length (tree, pending_statics) != 0)
3120 check_global_declarations (VEC_address (tree, pending_statics),
3121 VEC_length (tree, pending_statics));
3122 emit_debug_global_declarations (VEC_address (tree, pending_statics),
3123 VEC_length (tree, pending_statics));
3126 /* Generate hidden aliases for Java. */
3127 build_java_method_aliases ();
3131 /* The entire file is now complete. If requested, dump everything
3135 FILE *stream = dump_begin (TDI_tu, &flags);
3139 dump_node (global_namespace, flags & ~TDF_SLIM, stream);
3140 dump_end (TDI_tu, stream);
3144 timevar_pop (TV_VARCONST);
3146 if (flag_detailed_statistics)
3148 dump_tree_statistics ();
3149 dump_time_statistics ();
3151 input_location = locus;
3153 #ifdef ENABLE_CHECKING
3154 validate_conversion_obstack ();
3155 #endif /* ENABLE_CHECKING */
3158 /* FN is an OFFSET_REF, DOTSTAR_EXPR or MEMBER_REF indicating the
3159 function to call in parse-tree form; it has not yet been
3160 semantically analyzed. ARGS are the arguments to the function.
3161 They have already been semantically analyzed. */
3164 build_offset_ref_call_from_tree (tree fn, tree args)
3173 object = TREE_OPERAND (fn, 0);
3175 if (processing_template_decl)
3177 gcc_assert (TREE_CODE (fn) == DOTSTAR_EXPR
3178 || TREE_CODE (fn) == MEMBER_REF);
3179 if (type_dependent_expression_p (fn)
3180 || any_type_dependent_arguments_p (args))
3181 return build_min_nt (CALL_EXPR, fn, args, NULL_TREE);
3183 /* Transform the arguments and add the implicit "this"
3184 parameter. That must be done before the FN is transformed
3185 because we depend on the form of FN. */
3186 args = build_non_dependent_args (args);
3187 if (TREE_CODE (fn) == DOTSTAR_EXPR)
3188 object = build_unary_op (ADDR_EXPR, object, 0);
3189 object = build_non_dependent_expr (object);
3190 args = tree_cons (NULL_TREE, object, args);
3191 /* Now that the arguments are done, transform FN. */
3192 fn = build_non_dependent_expr (fn);
3195 /* A qualified name corresponding to a bound pointer-to-member is
3196 represented as an OFFSET_REF:
3198 struct B { void g(); };
3200 void B::g() { (this->*p)(); } */
3201 if (TREE_CODE (fn) == OFFSET_REF)
3203 tree object_addr = build_unary_op (ADDR_EXPR, object, 0);
3204 fn = TREE_OPERAND (fn, 1);
3205 fn = get_member_function_from_ptrfunc (&object_addr, fn);
3206 args = tree_cons (NULL_TREE, object_addr, args);
3209 expr = build_function_call (fn, args);
3210 if (processing_template_decl && expr != error_mark_node)
3211 return build_min_non_dep (CALL_EXPR, expr, orig_fn, orig_args, NULL_TREE);
3217 check_default_args (tree x)
3219 tree arg = TYPE_ARG_TYPES (TREE_TYPE (x));
3220 bool saw_def = false;
3221 int i = 0 - (TREE_CODE (TREE_TYPE (x)) == METHOD_TYPE);
3222 for (; arg && arg != void_list_node; arg = TREE_CHAIN (arg), ++i)
3224 if (TREE_PURPOSE (arg))
3228 error ("default argument missing for parameter %P of %q+#D", i, x);
3234 /* Mark DECL as "used" in the program. If DECL is a specialization or
3235 implicitly declared class member, generate the actual definition. */
3238 mark_used (tree decl)
3240 HOST_WIDE_INT saved_processing_template_decl = 0;
3242 TREE_USED (decl) = 1;
3243 /* If we don't need a value, then we don't need to synthesize DECL. */
3244 if (skip_evaluation)
3246 /* Normally, we can wait until instantiation-time to synthesize
3247 DECL. However, if DECL is a static data member initialized with
3248 a constant, we need the value right now because a reference to
3249 such a data member is not value-dependent. */
3250 if (processing_template_decl)
3252 if (TREE_CODE (decl) == VAR_DECL
3253 && DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl)
3254 && DECL_CLASS_SCOPE_P (decl)
3255 && !dependent_type_p (DECL_CONTEXT (decl)))
3257 /* Pretend that we are not in a template so that the
3258 initializer for the static data member will be full
3260 saved_processing_template_decl = processing_template_decl;
3261 processing_template_decl = 0;
3267 if (TREE_CODE (decl) == FUNCTION_DECL && DECL_DECLARED_INLINE_P (decl)
3268 && !TREE_ASM_WRITTEN (decl))
3269 /* Remember it, so we can check it was defined. */
3271 if (DECL_DEFERRED_FN (decl))
3274 /* Remember the current location for a function we will end up
3275 synthesizing. Then we can inform the user where it was
3276 required in the case of error. */
3277 if (DECL_ARTIFICIAL (decl) && DECL_NONSTATIC_MEMBER_FUNCTION_P (decl)
3278 && !DECL_THUNK_P (decl))
3279 DECL_SOURCE_LOCATION (decl) = input_location;
3281 note_vague_linkage_fn (decl);
3284 assemble_external (decl);
3286 /* Is it a synthesized method that needs to be synthesized? */
3287 if (TREE_CODE (decl) == FUNCTION_DECL
3288 && DECL_NONSTATIC_MEMBER_FUNCTION_P (decl)
3289 && DECL_ARTIFICIAL (decl)
3290 && !DECL_THUNK_P (decl)
3291 && ! DECL_INITIAL (decl)
3292 /* Kludge: don't synthesize for default args. Unfortunately this
3293 rules out initializers of namespace-scoped objects too, but
3294 it's sort-of ok if the implicit ctor or dtor decl keeps
3295 pointing to the class location. */
3296 && current_function_decl)
3298 synthesize_method (decl);
3299 /* If we've already synthesized the method we don't need to
3300 instantiate it, so we can return right away. */
3304 /* If this is a function or variable that is an instance of some
3305 template, we now know that we will need to actually do the
3306 instantiation. We check that DECL is not an explicit
3307 instantiation because that is not checked in instantiate_decl. */
3308 if ((DECL_NON_THUNK_FUNCTION_P (decl) || TREE_CODE (decl) == VAR_DECL)
3309 && DECL_LANG_SPECIFIC (decl) && DECL_TEMPLATE_INFO (decl)
3310 && (!DECL_EXPLICIT_INSTANTIATION (decl)
3311 || (TREE_CODE (decl) == FUNCTION_DECL
3312 && DECL_INLINE (DECL_TEMPLATE_RESULT
3313 (template_for_substitution (decl))))
3314 /* We need to instantiate static data members so that there
3315 initializers are available in integral constant
3317 || (TREE_CODE (decl) == VAR_DECL
3318 && DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl))))
3319 /* We put off instantiating functions in order to improve compile
3320 times. Maintaining a stack of active functions is expensive,
3321 and the inliner knows to instantiate any functions it might
3323 instantiate_decl (decl, /*defer_ok=*/true,
3324 /*expl_inst_class_mem_p=*/false);
3326 processing_template_decl = saved_processing_template_decl;
3329 #include "gt-cp-decl2.h"