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 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, 59 Temple Place - Suite 330,
21 Boston, MA 02111-1307, 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 extern cpp_reader *parse_in;
54 /* This structure contains information about the initializations
55 and/or destructions required for a particular priority level. */
56 typedef struct priority_info_s {
57 /* Nonzero if there have been any initializations at this priority
58 throughout the translation unit. */
59 int initializations_p;
60 /* Nonzero if there have been any destructions at this priority
61 throughout the translation unit. */
65 static void mark_vtable_entries (tree);
66 static void grok_function_init (tree, tree);
67 static bool maybe_emit_vtables (tree);
68 static tree build_anon_union_vars (tree);
69 static bool acceptable_java_type (tree);
70 static tree start_objects (int, int);
71 static void finish_objects (int, int, tree);
72 static tree start_static_storage_duration_function (unsigned);
73 static void finish_static_storage_duration_function (tree);
74 static priority_info get_priority_info (int);
75 static void do_static_initialization (tree, tree);
76 static void do_static_destruction (tree);
77 static tree start_static_initialization_or_destruction (tree, int);
78 static void finish_static_initialization_or_destruction (tree);
79 static void generate_ctor_or_dtor_function (bool, int, location_t *);
80 static int generate_ctor_and_dtor_functions_for_priority (splay_tree_node,
82 static tree prune_vars_needing_no_initialization (tree *);
83 static void write_out_vars (tree);
84 static void import_export_class (tree);
85 static tree get_guard_bits (tree);
87 /* A list of static class variables. This is needed, because a
88 static class variable can be declared inside the class without
89 an initializer, and then initialized, statically, outside the class. */
90 static GTY(()) varray_type pending_statics;
91 #define pending_statics_used \
92 (pending_statics ? pending_statics->elements_used : 0)
94 /* A list of functions which were declared inline, but which we
95 may need to emit outline anyway. */
96 static GTY(()) varray_type deferred_fns;
97 #define deferred_fns_used \
98 (deferred_fns ? deferred_fns->elements_used : 0)
100 /* Flag used when debugging spew.c */
102 extern int spew_debug;
104 /* Nonzero if we're done parsing and into end-of-file activities. */
108 /* Functions called along with real static constructors and destructors. */
114 /* Incorporate `const' and `volatile' qualifiers for member functions.
115 FUNCTION is a TYPE_DECL or a FUNCTION_DECL.
116 QUALS is a list of qualifiers. Returns any explicit
117 top-level qualifiers of the method's this pointer, anything other than
118 TYPE_UNQUALIFIED will be an extension. */
121 grok_method_quals (tree ctype, tree function, cp_cv_quals quals)
123 tree fntype = TREE_TYPE (function);
124 tree raises = TYPE_RAISES_EXCEPTIONS (fntype);
125 int type_quals = TYPE_UNQUALIFIED;
126 int this_quals = TYPE_UNQUALIFIED;
128 type_quals = quals & ~TYPE_QUAL_RESTRICT;
129 this_quals = quals & TYPE_QUAL_RESTRICT;
131 ctype = cp_build_qualified_type (ctype, type_quals);
132 fntype = build_method_type_directly (ctype, TREE_TYPE (fntype),
133 (TREE_CODE (fntype) == METHOD_TYPE
134 ? TREE_CHAIN (TYPE_ARG_TYPES (fntype))
135 : TYPE_ARG_TYPES (fntype)));
137 fntype = build_exception_variant (fntype, raises);
139 TREE_TYPE (function) = fntype;
143 /* Build a PARM_DECL with NAME and TYPE, and set DECL_ARG_TYPE
147 cp_build_parm_decl (tree name, tree type)
149 tree parm = build_decl (PARM_DECL, name, type);
150 /* DECL_ARG_TYPE is only used by the back end and the back end never
152 if (!processing_template_decl)
153 DECL_ARG_TYPE (parm) = type_passed_as (type);
157 /* Returns a PARM_DECL for a parameter of the indicated TYPE, with the
161 build_artificial_parm (tree name, tree type)
163 tree parm = cp_build_parm_decl (name, type);
164 DECL_ARTIFICIAL (parm) = 1;
165 /* All our artificial parms are implicitly `const'; they cannot be
167 TREE_READONLY (parm) = 1;
171 /* Constructors for types with virtual baseclasses need an "in-charge" flag
172 saying whether this constructor is responsible for initialization of
173 virtual baseclasses or not. All destructors also need this "in-charge"
174 flag, which additionally determines whether or not the destructor should
175 free the memory for the object.
177 This function adds the "in-charge" flag to member function FN if
178 appropriate. It is called from grokclassfn and tsubst.
179 FN must be either a constructor or destructor.
181 The in-charge flag follows the 'this' parameter, and is followed by the
182 VTT parm (if any), then the user-written parms. */
185 maybe_retrofit_in_chrg (tree fn)
187 tree basetype, arg_types, parms, parm, fntype;
189 /* If we've already add the in-charge parameter don't do it again. */
190 if (DECL_HAS_IN_CHARGE_PARM_P (fn))
193 /* When processing templates we can't know, in general, whether or
194 not we're going to have virtual baseclasses. */
195 if (processing_template_decl)
198 /* We don't need an in-charge parameter for constructors that don't
199 have virtual bases. */
200 if (DECL_CONSTRUCTOR_P (fn)
201 && !TYPE_USES_VIRTUAL_BASECLASSES (DECL_CONTEXT (fn)))
204 arg_types = TYPE_ARG_TYPES (TREE_TYPE (fn));
205 basetype = TREE_TYPE (TREE_VALUE (arg_types));
206 arg_types = TREE_CHAIN (arg_types);
208 parms = TREE_CHAIN (DECL_ARGUMENTS (fn));
210 /* If this is a subobject constructor or destructor, our caller will
211 pass us a pointer to our VTT. */
212 if (TYPE_USES_VIRTUAL_BASECLASSES (DECL_CONTEXT (fn)))
214 parm = build_artificial_parm (vtt_parm_identifier, vtt_parm_type);
216 /* First add it to DECL_ARGUMENTS between 'this' and the real args... */
217 TREE_CHAIN (parm) = parms;
220 /* ...and then to TYPE_ARG_TYPES. */
221 arg_types = hash_tree_chain (vtt_parm_type, arg_types);
223 DECL_HAS_VTT_PARM_P (fn) = 1;
226 /* Then add the in-charge parm (before the VTT parm). */
227 parm = build_artificial_parm (in_charge_identifier, integer_type_node);
228 TREE_CHAIN (parm) = parms;
230 arg_types = hash_tree_chain (integer_type_node, arg_types);
232 /* Insert our new parameter(s) into the list. */
233 TREE_CHAIN (DECL_ARGUMENTS (fn)) = parms;
235 /* And rebuild the function type. */
236 fntype = build_method_type_directly (basetype, TREE_TYPE (TREE_TYPE (fn)),
238 if (TYPE_RAISES_EXCEPTIONS (TREE_TYPE (fn)))
239 fntype = build_exception_variant (fntype,
240 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (fn)));
241 TREE_TYPE (fn) = fntype;
243 /* Now we've got the in-charge parameter. */
244 DECL_HAS_IN_CHARGE_PARM_P (fn) = 1;
247 /* Classes overload their constituent function names automatically.
248 When a function name is declared in a record structure,
249 its name is changed to it overloaded name. Since names for
250 constructors and destructors can conflict, we place a leading
253 CNAME is the name of the class we are grokking for.
255 FUNCTION is a FUNCTION_DECL. It was created by `grokdeclarator'.
257 FLAGS contains bits saying what's special about today's
258 arguments. 1 == DESTRUCTOR. 2 == OPERATOR.
260 If FUNCTION is a destructor, then we must add the `auto-delete' field
261 as a second parameter. There is some hair associated with the fact
262 that we must "declare" this variable in the manner consistent with the
263 way the rest of the arguments were declared.
265 QUALS are the qualifiers for the this pointer. */
268 grokclassfn (tree ctype, tree function, enum overload_flags flags,
271 tree fn_name = DECL_NAME (function);
272 cp_cv_quals this_quals = TYPE_UNQUALIFIED;
274 /* Even within an `extern "C"' block, members get C++ linkage. See
275 [dcl.link] for details. */
276 SET_DECL_LANGUAGE (function, lang_cplusplus);
278 if (fn_name == NULL_TREE)
280 error ("name missing for member function");
281 fn_name = get_identifier ("<anonymous>");
282 DECL_NAME (function) = fn_name;
286 this_quals = grok_method_quals (ctype, function, quals);
288 if (TREE_CODE (TREE_TYPE (function)) == METHOD_TYPE)
290 /* Must add the class instance variable up front. */
291 /* Right now we just make this a pointer. But later
292 we may wish to make it special. */
293 tree type = TREE_VALUE (TYPE_ARG_TYPES (TREE_TYPE (function)));
297 /* The `this' parameter is implicitly `const'; it cannot be
299 this_quals |= TYPE_QUAL_CONST;
300 qual_type = cp_build_qualified_type (type, this_quals);
301 parm = build_artificial_parm (this_identifier, qual_type);
302 c_apply_type_quals_to_decl (this_quals, parm);
303 TREE_CHAIN (parm) = DECL_ARGUMENTS (function);
304 DECL_ARGUMENTS (function) = parm;
307 DECL_CONTEXT (function) = ctype;
309 if (flags == DTOR_FLAG)
310 DECL_DESTRUCTOR_P (function) = 1;
312 if (flags == DTOR_FLAG || DECL_CONSTRUCTOR_P (function))
313 maybe_retrofit_in_chrg (function);
316 /* Create an ARRAY_REF, checking for the user doing things backwards
320 grok_array_decl (tree array_expr, tree index_exp)
324 tree orig_array_expr = array_expr;
325 tree orig_index_exp = index_exp;
327 if (error_operand_p (array_expr) || error_operand_p (index_exp))
328 return error_mark_node;
330 if (processing_template_decl)
332 if (type_dependent_expression_p (array_expr)
333 || type_dependent_expression_p (index_exp))
334 return build_min_nt (ARRAY_REF, array_expr, index_exp,
335 NULL_TREE, NULL_TREE);
336 array_expr = build_non_dependent_expr (array_expr);
337 index_exp = build_non_dependent_expr (index_exp);
340 type = TREE_TYPE (array_expr);
342 type = non_reference (type);
344 /* If they have an `operator[]', use that. */
345 if (IS_AGGR_TYPE (type) || IS_AGGR_TYPE (TREE_TYPE (index_exp)))
346 expr = build_new_op (ARRAY_REF, LOOKUP_NORMAL,
347 array_expr, index_exp, NULL_TREE,
348 /*overloaded_p=*/NULL);
353 /* Otherwise, create an ARRAY_REF for a pointer or array type.
354 It is a little-known fact that, if `a' is an array and `i' is
355 an int, you can write `i[a]', which means the same thing as
357 if (TREE_CODE (type) == ARRAY_TYPE)
360 p1 = build_expr_type_conversion (WANT_POINTER, array_expr, false);
362 if (TREE_CODE (TREE_TYPE (index_exp)) == ARRAY_TYPE)
365 p2 = build_expr_type_conversion (WANT_POINTER, index_exp, false);
367 i1 = build_expr_type_conversion (WANT_INT | WANT_ENUM, array_expr,
369 i2 = build_expr_type_conversion (WANT_INT | WANT_ENUM, index_exp,
372 if ((p1 && i2) && (i1 && p2))
373 error ("ambiguous conversion for array subscript");
376 array_expr = p1, index_exp = i2;
378 array_expr = p2, index_exp = i1;
381 error ("invalid types `%T[%T]' for array subscript",
382 type, TREE_TYPE (index_exp));
383 return error_mark_node;
386 if (array_expr == error_mark_node || index_exp == error_mark_node)
387 error ("ambiguous conversion for array subscript");
389 expr = build_array_ref (array_expr, index_exp);
391 if (processing_template_decl && expr != error_mark_node)
392 return build_min_non_dep (ARRAY_REF, expr, orig_array_expr, orig_index_exp,
393 NULL_TREE, NULL_TREE);
397 /* Given the cast expression EXP, checking out its validity. Either return
398 an error_mark_node if there was an unavoidable error, return a cast to
399 void for trying to delete a pointer w/ the value 0, or return the
400 call to delete. If DOING_VEC is true, we handle things differently
401 for doing an array delete.
402 Implements ARM $5.3.4. This is called from the parser. */
405 delete_sanity (tree exp, tree size, bool doing_vec, int use_global_delete)
409 if (exp == error_mark_node)
412 if (processing_template_decl)
414 t = build_min (DELETE_EXPR, void_type_node, exp, size);
415 DELETE_EXPR_USE_GLOBAL (t) = use_global_delete;
416 DELETE_EXPR_USE_VEC (t) = doing_vec;
417 TREE_SIDE_EFFECTS (t) = 1;
421 exp = convert_from_reference (exp);
423 /* An array can't have been allocated by new, so complain. */
424 if (TREE_CODE (exp) == VAR_DECL
425 && TREE_CODE (TREE_TYPE (exp)) == ARRAY_TYPE)
426 warning ("deleting array `%#D'", exp);
428 t = build_expr_type_conversion (WANT_POINTER, exp, true);
430 if (t == NULL_TREE || t == error_mark_node)
432 error ("type `%#T' argument given to `delete', expected pointer",
434 return error_mark_node;
437 type = TREE_TYPE (t);
439 /* As of Valley Forge, you can delete a pointer to const. */
441 /* You can't delete functions. */
442 if (TREE_CODE (TREE_TYPE (type)) == FUNCTION_TYPE)
444 error ("cannot delete a function. Only pointer-to-objects are valid arguments to `delete'");
445 return error_mark_node;
448 /* Deleting ptr to void is undefined behavior [expr.delete/3]. */
449 if (TREE_CODE (TREE_TYPE (type)) == VOID_TYPE)
451 warning ("deleting `%T' is undefined", type);
455 /* Deleting a pointer with the value zero is valid and has no effect. */
456 if (integer_zerop (t))
457 return build1 (NOP_EXPR, void_type_node, t);
460 return build_vec_delete (t, /*maxindex=*/NULL_TREE,
461 sfk_deleting_destructor,
464 return build_delete (type, t, sfk_deleting_destructor,
465 LOOKUP_NORMAL, use_global_delete);
468 /* Report an error if the indicated template declaration is not the
469 sort of thing that should be a member template. */
472 check_member_template (tree tmpl)
476 gcc_assert (TREE_CODE (tmpl) == TEMPLATE_DECL);
477 decl = DECL_TEMPLATE_RESULT (tmpl);
479 if (TREE_CODE (decl) == FUNCTION_DECL
480 || (TREE_CODE (decl) == TYPE_DECL
481 && IS_AGGR_TYPE (TREE_TYPE (decl))))
483 if (current_function_decl)
484 /* 14.5.2.2 [temp.mem]
486 A local class shall not have member templates. */
487 error ("invalid declaration of member template `%#D' in local class",
490 if (TREE_CODE (decl) == FUNCTION_DECL && DECL_VIRTUAL_P (decl))
492 /* 14.5.2.3 [temp.mem]
494 A member function template shall not be virtual. */
496 ("invalid use of `virtual' in template declaration of `%#D'",
498 DECL_VIRTUAL_P (decl) = 0;
501 /* The debug-information generating code doesn't know what to do
502 with member templates. */
503 DECL_IGNORED_P (tmpl) = 1;
506 error ("template declaration of `%#D'", decl);
509 /* Return true iff TYPE is a valid Java parameter or return type. */
512 acceptable_java_type (tree type)
514 if (TREE_CODE (type) == VOID_TYPE || TYPE_FOR_JAVA (type))
516 if (TREE_CODE (type) == POINTER_TYPE || TREE_CODE (type) == REFERENCE_TYPE)
518 type = TREE_TYPE (type);
519 if (TREE_CODE (type) == RECORD_TYPE)
522 if (! TYPE_FOR_JAVA (type))
524 if (! CLASSTYPE_TEMPLATE_INFO (type))
526 args = CLASSTYPE_TI_ARGS (type);
527 i = TREE_VEC_LENGTH (args);
530 type = TREE_VEC_ELT (args, i);
531 if (TREE_CODE (type) == POINTER_TYPE)
532 type = TREE_TYPE (type);
533 if (! TYPE_FOR_JAVA (type))
542 /* For a METHOD in a Java class CTYPE, return true if
543 the parameter and return types are valid Java types.
544 Otherwise, print appropriate error messages, and return false. */
547 check_java_method (tree method)
550 tree arg_types = TYPE_ARG_TYPES (TREE_TYPE (method));
551 tree ret_type = TREE_TYPE (TREE_TYPE (method));
553 if (!acceptable_java_type (ret_type))
555 error ("Java method '%D' has non-Java return type `%T'",
560 arg_types = TREE_CHAIN (arg_types);
561 if (DECL_HAS_IN_CHARGE_PARM_P (method))
562 arg_types = TREE_CHAIN (arg_types);
563 if (DECL_HAS_VTT_PARM_P (method))
564 arg_types = TREE_CHAIN (arg_types);
566 for (; arg_types != NULL_TREE; arg_types = TREE_CHAIN (arg_types))
568 tree type = TREE_VALUE (arg_types);
569 if (!acceptable_java_type (type))
571 error ("Java method '%D' has non-Java parameter type `%T'",
579 /* Sanity check: report error if this function FUNCTION is not
580 really a member of the class (CTYPE) it is supposed to belong to.
581 TEMPLATE_PARMS is used to specifiy the template parameters of a member
582 template passed as FUNCTION_DECL. If the member template is passed as a
583 TEMPLATE_DECL, it can be NULL since the parameters can be extracted
584 from the declaration. If the function is not a function template, it
586 It returns the original declaration for the function, or NULL_TREE
587 if no declaration was found (and an error was emitted). */
590 check_classfn (tree ctype, tree function, tree template_parms)
595 if (DECL_USE_TEMPLATE (function)
596 && !(TREE_CODE (function) == TEMPLATE_DECL
597 && DECL_TEMPLATE_SPECIALIZATION (function))
598 && is_member_template (DECL_TI_TEMPLATE (function)))
599 /* Since this is a specialization of a member template,
600 we're not going to find the declaration in the class.
603 struct S { template <typename T> void f(T); };
604 template <> void S::f(int);
606 we're not going to find `S::f(int)', but there's no
607 reason we should, either. We let our callers know we didn't
608 find the method, but we don't complain. */
611 /* Basic sanity check: for a template function, the template parameters
612 either were not passed, or they are the same of DECL_TEMPLATE_PARMS. */
613 if (TREE_CODE (function) == TEMPLATE_DECL)
615 gcc_assert (!template_parms
616 || comp_template_parms (template_parms,
617 DECL_TEMPLATE_PARMS (function)));
618 template_parms = DECL_TEMPLATE_PARMS (function);
621 /* OK, is this a definition of a member template? */
622 is_template = (template_parms != NULL_TREE);
624 ix = lookup_fnfields_1 (complete_type (ctype),
625 DECL_CONSTRUCTOR_P (function) ? ctor_identifier :
626 DECL_DESTRUCTOR_P (function) ? dtor_identifier :
627 DECL_NAME (function));
631 VEC(tree) *methods = CLASSTYPE_METHOD_VEC (ctype);
632 tree fndecls, fndecl = 0;
635 const char *format = NULL;
637 pop_p = push_scope (ctype);
638 for (fndecls = VEC_index (tree, methods, ix);
639 fndecls; fndecls = OVL_NEXT (fndecls))
643 fndecl = OVL_CURRENT (fndecls);
644 p1 = TYPE_ARG_TYPES (TREE_TYPE (function));
645 p2 = TYPE_ARG_TYPES (TREE_TYPE (fndecl));
647 /* We cannot simply call decls_match because this doesn't
648 work for static member functions that are pretending to
649 be methods, and because the name may have been changed by
652 /* Get rid of the this parameter on functions that become
654 if (DECL_STATIC_FUNCTION_P (fndecl)
655 && TREE_CODE (TREE_TYPE (function)) == METHOD_TYPE)
656 p1 = TREE_CHAIN (p1);
658 /* A member template definition only matches a member template
660 if (is_template != (TREE_CODE (fndecl) == TEMPLATE_DECL))
663 if (same_type_p (TREE_TYPE (TREE_TYPE (function)),
664 TREE_TYPE (TREE_TYPE (fndecl)))
665 && compparms (p1, p2)
667 || comp_template_parms (template_parms,
668 DECL_TEMPLATE_PARMS (fndecl)))
669 && (DECL_TEMPLATE_SPECIALIZATION (function)
670 == DECL_TEMPLATE_SPECIALIZATION (fndecl))
671 && (!DECL_TEMPLATE_SPECIALIZATION (function)
672 || (DECL_TI_TEMPLATE (function)
673 == DECL_TI_TEMPLATE (fndecl))))
679 return OVL_CURRENT (fndecls);
680 error ("prototype for `%#D' does not match any in class `%T'",
682 is_conv_op = DECL_CONV_FN_P (fndecl);
685 ix = CLASSTYPE_FIRST_CONVERSION_SLOT;
686 fndecls = VEC_index (tree, methods, ix);
689 fndecl = OVL_CURRENT (fndecls);
690 fndecls = OVL_NEXT (fndecls);
692 if (!fndecls && is_conv_op)
694 if (VEC_length (tree, methods) > (size_t) ++ix)
696 fndecls = VEC_index (tree, methods, ix);
697 if (!DECL_CONV_FN_P (OVL_CURRENT (fndecls)))
709 format = "candidates are: %#D";
711 format = "candidate is: %#D";
712 cp_error_at (format, fndecl);
715 else if (!COMPLETE_TYPE_P (ctype))
716 cxx_incomplete_type_error (function, ctype);
718 error ("no `%#D' member function declared in class `%T'",
721 /* If we did not find the method in the class, add it to avoid
722 spurious errors (unless the CTYPE is not yet defined, in which
723 case we'll only confuse ourselves when the function is declared
724 properly within the class. */
725 if (COMPLETE_TYPE_P (ctype))
726 add_method (ctype, function);
730 /* DECL is a function with vague linkage. Remember it so that at the
731 end of the translation unit we can decide whether or not to emit
735 note_vague_linkage_fn (tree decl)
737 if (!DECL_DEFERRED_FN (decl))
739 DECL_DEFERRED_FN (decl) = 1;
740 DECL_DEFER_OUTPUT (decl) = 1;
742 VARRAY_TREE_INIT (deferred_fns, 32, "deferred_fns");
743 VARRAY_PUSH_TREE (deferred_fns, decl);
747 /* Like note_vague_linkage_fn but for variables. */
750 note_vague_linkage_var (tree var)
752 if (!pending_statics)
753 VARRAY_TREE_INIT (pending_statics, 32, "pending_statics");
754 VARRAY_PUSH_TREE (pending_statics, var);
757 /* We have just processed the DECL, which is a static data member.
758 Its initializer, if present, is INIT. The ASMSPEC_TREE, if
759 present, is the assembly-language name for the data member.
760 FLAGS is as for cp_finish_decl. */
763 finish_static_data_member_decl (tree decl, tree init, tree asmspec_tree,
766 gcc_assert (TREE_PUBLIC (decl));
768 DECL_CONTEXT (decl) = current_class_type;
770 /* We cannot call pushdecl here, because that would fill in the
771 TREE_CHAIN of our decl. Instead, we modify cp_finish_decl to do
772 the right thing, namely, to put this decl out straight away. */
773 /* current_class_type can be NULL_TREE in case of error. */
774 if (!asmspec_tree && current_class_type)
775 DECL_INITIAL (decl) = error_mark_node;
777 if (! processing_template_decl)
778 note_vague_linkage_var (decl);
780 if (LOCAL_CLASS_P (current_class_type))
781 pedwarn ("local class `%#T' shall not have static data member `%#D'",
782 current_class_type, decl);
784 /* Static consts need not be initialized in the class definition. */
785 if (init != NULL_TREE && TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl)))
787 static int explained = 0;
789 error ("initializer invalid for static member with constructor");
792 error ("(an out of class initialization is required)");
797 /* Force the compiler to know when an uninitialized static const
798 member is being used. */
799 if (CP_TYPE_CONST_P (TREE_TYPE (decl)) && init == 0)
800 TREE_USED (decl) = 1;
801 DECL_INITIAL (decl) = init;
802 DECL_IN_AGGR_P (decl) = 1;
804 cp_finish_decl (decl, init, asmspec_tree, flags);
807 /* Process the specs, declarator (NULL if omitted) and width (NULL if omitted)
808 of a structure component, returning a _DECL node.
809 QUALS is a list of type qualifiers for this decl (such as for declaring
810 const member functions).
812 This is done during the parsing of the struct declaration.
813 The _DECL nodes are chained together and the lot of them
814 are ultimately passed to `build_struct' to make the RECORD_TYPE node.
816 If class A defines that certain functions in class B are friends, then
817 the way I have set things up, it is B who is interested in permission
818 granted by A. However, it is in A's context that these declarations
819 are parsed. By returning a void_type_node, class A does not attempt
820 to incorporate the declarations of the friends within its structure.
822 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
823 CHANGES TO CODE IN `start_method'. */
826 grokfield (const cp_declarator *declarator,
827 cp_decl_specifier_seq *declspecs,
828 tree init, tree asmspec_tree,
832 const char *asmspec = 0;
833 int flags = LOOKUP_ONLYCONVERTING;
835 if (!declspecs->any_specifiers_p
836 && declarator->kind == cdk_id
837 && TREE_CODE (declarator->u.id.name) == SCOPE_REF
838 && (TREE_CODE (TREE_OPERAND (declarator->u.id.name, 1))
840 /* Access declaration */
841 return do_class_using_decl (declarator->u.id.name);
844 && TREE_CODE (init) == TREE_LIST
845 && TREE_VALUE (init) == error_mark_node
846 && TREE_CHAIN (init) == NULL_TREE)
849 value = grokdeclarator (declarator, declspecs, FIELD, init != 0, &attrlist);
850 if (! value || error_operand_p (value))
851 /* friend or constructor went bad. */
852 return error_mark_node;
854 if (TREE_CODE (value) == TYPE_DECL && init)
856 error ("typedef `%D' is initialized (use __typeof__ instead)", value);
860 /* Pass friendly classes back. */
861 if (value == void_type_node)
864 /* Pass friend decls back. */
865 if ((TREE_CODE (value) == FUNCTION_DECL
866 || TREE_CODE (value) == TEMPLATE_DECL)
867 && DECL_CONTEXT (value) != current_class_type)
870 if (DECL_NAME (value) != NULL_TREE
871 && IDENTIFIER_POINTER (DECL_NAME (value))[0] == '_'
872 && ! strcmp (IDENTIFIER_POINTER (DECL_NAME (value)), "_vptr"))
873 error ("member `%D' conflicts with virtual function table field name",
876 /* Stash away type declarations. */
877 if (TREE_CODE (value) == TYPE_DECL)
879 DECL_NONLOCAL (value) = 1;
880 DECL_CONTEXT (value) = current_class_type;
882 if (processing_template_decl)
883 value = push_template_decl (value);
888 if (DECL_IN_AGGR_P (value))
890 error ("`%D' is already defined in `%T'", value,
891 DECL_CONTEXT (value));
892 return void_type_node;
896 asmspec = TREE_STRING_POINTER (asmspec_tree);
900 if (TREE_CODE (value) == FUNCTION_DECL)
902 grok_function_init (value, init);
905 else if (pedantic && TREE_CODE (value) != VAR_DECL)
906 /* Already complained in grokdeclarator. */
910 /* We allow initializers to become parameters to base
912 if (TREE_CODE (init) == TREE_LIST)
914 if (TREE_CHAIN (init) == NULL_TREE)
915 init = TREE_VALUE (init);
917 init = digest_init (TREE_TYPE (value), init, (tree *)0);
920 if (!processing_template_decl)
922 if (TREE_CODE (init) == CONST_DECL)
923 init = DECL_INITIAL (init);
924 else if (TREE_READONLY_DECL_P (init))
925 init = decl_constant_value (init);
926 else if (TREE_CODE (init) == CONSTRUCTOR)
927 init = digest_init (TREE_TYPE (value), init, (tree *)0);
928 if (init != error_mark_node && ! TREE_CONSTANT (init))
930 /* We can allow references to things that are effectively
931 static, since references are initialized with the
933 if (TREE_CODE (TREE_TYPE (value)) != REFERENCE_TYPE
934 || (TREE_STATIC (init) == 0
935 && (!DECL_P (init) || DECL_EXTERNAL (init) == 0)))
937 error ("field initializer is not constant");
938 init = error_mark_node;
945 if (processing_template_decl
946 && (TREE_CODE (value) == VAR_DECL || TREE_CODE (value) == FUNCTION_DECL))
948 value = push_template_decl (value);
949 if (error_operand_p (value))
950 return error_mark_node;
954 cplus_decl_attributes (&value, attrlist, 0);
956 switch (TREE_CODE (value))
959 finish_static_data_member_decl (value, init, asmspec_tree,
965 error ("`asm' specifiers are not permitted on non-static data members");
966 if (DECL_INITIAL (value) == error_mark_node)
967 init = error_mark_node;
968 cp_finish_decl (value, init, NULL_TREE, flags);
969 DECL_INITIAL (value) = init;
970 DECL_IN_AGGR_P (value) = 1;
975 set_user_assembler_name (value, asmspec);
976 if (!DECL_FRIEND_P (value))
977 grok_special_member_properties (value);
979 cp_finish_decl (value, init, asmspec_tree, flags);
981 /* Pass friends back this way. */
982 if (DECL_FRIEND_P (value))
983 return void_type_node;
985 DECL_IN_AGGR_P (value) = 1;
994 /* Like `grokfield', but for bitfields.
995 WIDTH is non-NULL for bit fields only, and is an INTEGER_CST node. */
998 grokbitfield (const cp_declarator *declarator,
999 cp_decl_specifier_seq *declspecs, tree width)
1001 tree value = grokdeclarator (declarator, declspecs, BITFIELD, 0, NULL);
1003 if (! value) return NULL_TREE; /* friends went bad. */
1005 /* Pass friendly classes back. */
1006 if (TREE_CODE (value) == VOID_TYPE)
1007 return void_type_node;
1009 if (TREE_CODE (value) == TYPE_DECL)
1011 error ("cannot declare `%D' to be a bit-field type", value);
1015 /* Usually, finish_struct_1 catches bitfields with invalid types.
1016 But, in the case of bitfields with function type, we confuse
1017 ourselves into thinking they are member functions, so we must
1019 if (TREE_CODE (value) == FUNCTION_DECL)
1021 error ("cannot declare bit-field `%D' with function type",
1026 if (DECL_IN_AGGR_P (value))
1028 error ("`%D' is already defined in the class %T", value,
1029 DECL_CONTEXT (value));
1030 return void_type_node;
1033 if (TREE_STATIC (value))
1035 error ("static member `%D' cannot be a bit-field", value);
1038 cp_finish_decl (value, NULL_TREE, NULL_TREE, 0);
1040 if (width != error_mark_node)
1042 constant_expression_warning (width);
1043 DECL_INITIAL (value) = width;
1044 SET_DECL_C_BIT_FIELD (value);
1047 DECL_IN_AGGR_P (value) = 1;
1051 /* When a function is declared with an initializer,
1052 do the right thing. Currently, there are two possibilities:
1057 // initialization possibility #1.
1058 virtual void f () = 0;
1080 // initialization possibility #2
1087 grok_function_init (tree decl, tree init)
1089 /* An initializer for a function tells how this function should
1091 tree type = TREE_TYPE (decl);
1093 if (TREE_CODE (type) == FUNCTION_TYPE)
1094 error ("initializer specified for non-member function `%D'", decl);
1095 else if (integer_zerop (init))
1096 DECL_PURE_VIRTUAL_P (decl) = 1;
1098 error ("invalid initializer for virtual method `%D'", decl);
1102 cplus_decl_attributes (tree *decl, tree attributes, int flags)
1104 if (*decl == NULL_TREE || *decl == void_type_node)
1107 if (TREE_CODE (*decl) == TEMPLATE_DECL)
1108 decl = &DECL_TEMPLATE_RESULT (*decl);
1110 decl_attributes (decl, attributes, flags);
1112 if (TREE_CODE (*decl) == TYPE_DECL)
1113 SET_IDENTIFIER_TYPE_VALUE (DECL_NAME (*decl), TREE_TYPE (*decl));
1116 /* Walks through the namespace- or function-scope anonymous union OBJECT,
1117 building appropriate ALIAS_DECLs. Returns one of the fields for use in
1118 the mangled name. */
1121 build_anon_union_vars (tree object)
1123 tree type = TREE_TYPE (object);
1124 tree main_decl = NULL_TREE;
1127 /* Rather than write the code to handle the non-union case,
1128 just give an error. */
1129 if (TREE_CODE (type) != UNION_TYPE)
1130 error ("anonymous struct not inside named type");
1132 for (field = TYPE_FIELDS (type);
1134 field = TREE_CHAIN (field))
1139 if (DECL_ARTIFICIAL (field))
1141 if (TREE_CODE (field) != FIELD_DECL)
1144 `%#D' invalid; an anonymous union can only have non-static data members",
1149 if (TREE_PRIVATE (field))
1150 cp_pedwarn_at ("private member `%#D' in anonymous union", field);
1151 else if (TREE_PROTECTED (field))
1152 cp_pedwarn_at ("protected member `%#D' in anonymous union", field);
1154 if (processing_template_decl)
1155 ref = build_min_nt (COMPONENT_REF, object,
1156 DECL_NAME (field), NULL_TREE);
1158 ref = build_class_member_access_expr (object, field, NULL_TREE,
1161 if (DECL_NAME (field))
1163 decl = build_decl (ALIAS_DECL, DECL_NAME (field), TREE_TYPE (field));
1164 DECL_INITIAL (decl) = ref;
1165 TREE_PUBLIC (decl) = 0;
1166 TREE_STATIC (decl) = 0;
1167 DECL_EXTERNAL (decl) = 1;
1168 decl = pushdecl (decl);
1170 else if (ANON_AGGR_TYPE_P (TREE_TYPE (field)))
1171 decl = build_anon_union_vars (ref);
1175 if (main_decl == NULL_TREE)
1182 /* Finish off the processing of a UNION_TYPE structure. If the union is an
1183 anonymous union, then all members must be laid out together. PUBLIC_P
1184 is nonzero if this union is not declared static. */
1187 finish_anon_union (tree anon_union_decl)
1189 tree type = TREE_TYPE (anon_union_decl);
1191 bool public_p = TREE_PUBLIC (anon_union_decl);
1193 /* The VAR_DECL's context is the same as the TYPE's context. */
1194 DECL_CONTEXT (anon_union_decl) = DECL_CONTEXT (TYPE_NAME (type));
1196 if (TYPE_FIELDS (type) == NULL_TREE)
1201 error ("namespace-scope anonymous aggregates must be static");
1205 main_decl = build_anon_union_vars (anon_union_decl);
1206 if (main_decl == NULL_TREE)
1208 warning ("anonymous union with no members");
1212 if (!processing_template_decl)
1214 /* Use main_decl to set the mangled name. */
1215 DECL_NAME (anon_union_decl) = DECL_NAME (main_decl);
1216 mangle_decl (anon_union_decl);
1217 DECL_NAME (anon_union_decl) = NULL_TREE;
1220 pushdecl (anon_union_decl);
1221 if (building_stmt_tree ()
1222 && at_function_scope_p ())
1223 add_decl_expr (anon_union_decl);
1224 else if (!processing_template_decl)
1225 rest_of_decl_compilation (anon_union_decl,
1226 toplevel_bindings_p (), at_eof);
1229 /* Auxiliary functions to make type signatures for
1230 `operator new' and `operator delete' correspond to
1231 what compiler will be expecting. */
1234 coerce_new_type (tree type)
1237 tree args = TYPE_ARG_TYPES (type);
1239 gcc_assert (TREE_CODE (type) == FUNCTION_TYPE);
1241 if (!same_type_p (TREE_TYPE (type), ptr_type_node))
1242 e = 1, error ("`operator new' must return type `%T'", ptr_type_node);
1244 if (!args || args == void_list_node
1245 || !same_type_p (TREE_VALUE (args), size_type_node))
1248 if (args && args != void_list_node)
1249 args = TREE_CHAIN (args);
1250 pedwarn ("`operator new' takes type `size_t' (`%T') as first parameter", size_type_node);
1255 args = tree_cons (NULL_TREE, size_type_node, args);
1258 type = build_exception_variant
1259 (build_function_type (ptr_type_node, args),
1260 TYPE_RAISES_EXCEPTIONS (type));
1268 coerce_delete_type (tree type)
1271 tree args = TYPE_ARG_TYPES (type);
1273 gcc_assert (TREE_CODE (type) == FUNCTION_TYPE);
1275 if (!same_type_p (TREE_TYPE (type), void_type_node))
1276 e = 1, error ("`operator delete' must return type `%T'", void_type_node);
1278 if (!args || args == void_list_node
1279 || !same_type_p (TREE_VALUE (args), ptr_type_node))
1282 if (args && args != void_list_node)
1283 args = TREE_CHAIN (args);
1284 error ("`operator delete' takes type `%T' as first parameter", ptr_type_node);
1289 args = tree_cons (NULL_TREE, ptr_type_node, args);
1292 type = build_exception_variant
1293 (build_function_type (void_type_node, args),
1294 TYPE_RAISES_EXCEPTIONS (type));
1303 mark_vtable_entries (tree decl)
1305 tree entries = CONSTRUCTOR_ELTS (DECL_INITIAL (decl));
1307 for (; entries; entries = TREE_CHAIN (entries))
1309 tree fnaddr = TREE_VALUE (entries);
1312 STRIP_NOPS (fnaddr);
1314 if (TREE_CODE (fnaddr) != ADDR_EXPR
1315 && TREE_CODE (fnaddr) != FDESC_EXPR)
1316 /* This entry is an offset: a virtual base class offset, a
1317 virtual call offset, an RTTI offset, etc. */
1320 fn = TREE_OPERAND (fnaddr, 0);
1321 TREE_ADDRESSABLE (fn) = 1;
1322 /* When we don't have vcall offsets, we output thunks whenever
1323 we output the vtables that contain them. With vcall offsets,
1324 we know all the thunks we'll need when we emit a virtual
1325 function, so we emit the thunks there instead. */
1326 if (DECL_THUNK_P (fn))
1327 use_thunk (fn, /*emit_p=*/0);
1332 /* Set DECL up to have the closest approximation of "initialized common"
1333 linkage available. */
1336 comdat_linkage (tree decl)
1339 make_decl_one_only (decl);
1340 else if (TREE_CODE (decl) == FUNCTION_DECL
1341 || (TREE_CODE (decl) == VAR_DECL && DECL_ARTIFICIAL (decl)))
1342 /* We can just emit function and compiler-generated variables
1343 statically; having multiple copies is (for the most part) only
1346 There are two correctness issues, however: the address of a
1347 template instantiation with external linkage should be the
1348 same, independent of what translation unit asks for the
1349 address, and this will not hold when we emit multiple copies of
1350 the function. However, there's little else we can do.
1352 Also, by default, the typeinfo implementation assumes that
1353 there will be only one copy of the string used as the name for
1354 each type. Therefore, if weak symbols are unavailable, the
1355 run-time library should perform a more conservative check; it
1356 should perform a string comparison, rather than an address
1358 TREE_PUBLIC (decl) = 0;
1361 /* Static data member template instantiations, however, cannot
1362 have multiple copies. */
1363 if (DECL_INITIAL (decl) == 0
1364 || DECL_INITIAL (decl) == error_mark_node)
1365 DECL_COMMON (decl) = 1;
1366 else if (EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl)))
1368 DECL_COMMON (decl) = 1;
1369 DECL_INITIAL (decl) = error_mark_node;
1371 else if (!DECL_EXPLICIT_INSTANTIATION (decl))
1373 /* We can't do anything useful; leave vars for explicit
1375 DECL_EXTERNAL (decl) = 1;
1376 DECL_NOT_REALLY_EXTERN (decl) = 0;
1380 if (DECL_LANG_SPECIFIC (decl))
1381 DECL_COMDAT (decl) = 1;
1384 /* For win32 we also want to put explicit instantiations in
1385 linkonce sections, so that they will be merged with implicit
1386 instantiations; otherwise we get duplicate symbol errors.
1387 For Darwin we do not want explicit instantiations to be
1391 maybe_make_one_only (tree decl)
1393 /* We used to say that this was not necessary on targets that support weak
1394 symbols, because the implicit instantiations will defer to the explicit
1395 one. However, that's not actually the case in SVR4; a strong definition
1396 after a weak one is an error. Also, not making explicit
1397 instantiations one_only means that we can end up with two copies of
1398 some template instantiations. */
1402 /* We can't set DECL_COMDAT on functions, or cp_finish_file will think
1403 we can get away with not emitting them if they aren't used. We need
1404 to for variables so that cp_finish_decl will update their linkage,
1405 because their DECL_INITIAL may not have been set properly yet. */
1407 if (!TARGET_WEAK_NOT_IN_ARCHIVE_TOC
1408 || (! DECL_EXPLICIT_INSTANTIATION (decl)
1409 && ! DECL_TEMPLATE_SPECIALIZATION (decl)))
1411 make_decl_one_only (decl);
1413 if (TREE_CODE (decl) == VAR_DECL)
1415 DECL_COMDAT (decl) = 1;
1416 /* Mark it needed so we don't forget to emit it. */
1417 mark_decl_referenced (decl);
1422 /* Determine whether or not we want to specifically import or export CTYPE,
1423 using various heuristics. */
1426 import_export_class (tree ctype)
1428 /* -1 for imported, 1 for exported. */
1429 int import_export = 0;
1431 /* It only makes sense to call this function at EOF. The reason is
1432 that this function looks at whether or not the first non-inline
1433 non-abstract virtual member function has been defined in this
1434 translation unit. But, we can't possibly know that until we've
1435 seen the entire translation unit. */
1436 gcc_assert (at_eof);
1438 if (CLASSTYPE_INTERFACE_KNOWN (ctype))
1441 /* If MULTIPLE_SYMBOL_SPACES is set and we saw a #pragma interface,
1442 we will have CLASSTYPE_INTERFACE_ONLY set but not
1443 CLASSTYPE_INTERFACE_KNOWN. In that case, we don't want to use this
1444 heuristic because someone will supply a #pragma implementation
1445 elsewhere, and deducing it here would produce a conflict. */
1446 if (CLASSTYPE_INTERFACE_ONLY (ctype))
1449 if (lookup_attribute ("dllimport", TYPE_ATTRIBUTES (ctype)))
1451 else if (lookup_attribute ("dllexport", TYPE_ATTRIBUTES (ctype)))
1453 else if (CLASSTYPE_IMPLICIT_INSTANTIATION (ctype)
1454 && !flag_implicit_templates)
1455 /* For a template class, without -fimplicit-templates, check the
1456 repository. If the virtual table is assigned to this
1457 translation unit, then export the class; otherwise, import
1459 import_export = repo_export_class_p (ctype) ? 1 : -1;
1460 else if (TYPE_POLYMORPHIC_P (ctype))
1462 /* The ABI specifies that the virtual table and associated
1463 information are emitted with the key method, if any. */
1464 tree method = CLASSTYPE_KEY_METHOD (ctype);
1465 /* If weak symbol support is not available, then we must be
1466 careful not to emit the vtable when the key function is
1467 inline. An inline function can be defined in multiple
1468 translation units. If we were to emit the vtable in each
1469 translation unit containing a definition, we would get
1470 multiple definition errors at link-time. */
1471 if (method && (flag_weak || ! DECL_DECLARED_INLINE_P (method)))
1472 import_export = (DECL_REALLY_EXTERN (method) ? -1 : 1);
1475 /* When MULTIPLE_SYMBOL_SPACES is set, we cannot count on seeing
1476 a definition anywhere else. */
1477 if (MULTIPLE_SYMBOL_SPACES && import_export == -1)
1480 /* Allow backends the chance to overrule the decision. */
1481 if (targetm.cxx.import_export_class)
1482 import_export = targetm.cxx.import_export_class (ctype, import_export);
1486 SET_CLASSTYPE_INTERFACE_KNOWN (ctype);
1487 CLASSTYPE_INTERFACE_ONLY (ctype) = (import_export < 0);
1491 /* Return true if VAR has already been provided to the back end; in that
1492 case VAR should not be modified further by the front end. */
1494 var_finalized_p (tree var)
1496 return cgraph_varpool_node (var)->finalized;
1499 /* DECL is a VAR_DECL or FUNCTION_DECL which, for whatever reason,
1500 must be emitted in this translation unit. Mark it as such. */
1503 mark_needed (tree decl)
1505 /* It's possible that we no longer need to set
1506 TREE_SYMBOL_REFERENCED here directly, but doing so is
1508 TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl)) = 1;
1509 mark_decl_referenced (decl);
1512 /* DECL is either a FUNCTION_DECL or a VAR_DECL. This function
1513 returns true if a definition of this entity should be provided in
1514 this object file. Callers use this function to determine whether
1515 or not to let the back end know that a definition of DECL is
1516 available in this translation unit. */
1519 decl_needed_p (tree decl)
1521 gcc_assert (TREE_CODE (decl) == VAR_DECL
1522 || TREE_CODE (decl) == FUNCTION_DECL);
1523 /* This function should only be called at the end of the translation
1524 unit. We cannot be sure of whether or not something will be
1525 COMDAT until that point. */
1526 gcc_assert (at_eof);
1528 /* All entities with external linkage that are not COMDAT should be
1529 emitted; they may be referred to from other object files. */
1530 if (TREE_PUBLIC (decl) && !DECL_COMDAT (decl))
1532 /* If this entity was used, let the back-end see it; it will decide
1533 whether or not to emit it into the object file. */
1534 if (TREE_USED (decl)
1535 || (DECL_ASSEMBLER_NAME_SET_P (decl)
1536 && TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl))))
1538 /* Otherwise, DECL does not need to be emitted -- yet. A subsequent
1539 reference to DECL might cause it to be emitted later. */
1543 /* If necessary, write out the vtables for the dynamic class CTYPE.
1544 Returns true if any vtables were emitted. */
1547 maybe_emit_vtables (tree ctype)
1553 /* If the vtables for this class have already been emitted there is
1554 nothing more to do. */
1555 primary_vtbl = CLASSTYPE_VTABLES (ctype);
1556 if (var_finalized_p (primary_vtbl))
1558 /* Ignore dummy vtables made by get_vtable_decl. */
1559 if (TREE_TYPE (primary_vtbl) == void_type_node)
1562 /* On some targets, we cannot determine the key method until the end
1563 of the translation unit -- which is when this function is
1565 if (!targetm.cxx.key_method_may_be_inline ())
1566 determine_key_method (ctype);
1568 /* See if any of the vtables are needed. */
1569 for (vtbl = CLASSTYPE_VTABLES (ctype); vtbl; vtbl = TREE_CHAIN (vtbl))
1571 import_export_decl (vtbl);
1572 if (DECL_NOT_REALLY_EXTERN (vtbl) && decl_needed_p (vtbl))
1577 /* If the references to this class' vtables are optimized away,
1578 still emit the appropriate debugging information. See
1580 if (DECL_COMDAT (primary_vtbl)
1581 && CLASSTYPE_DEBUG_REQUESTED (ctype))
1582 note_debug_info_needed (ctype);
1586 /* The ABI requires that we emit all of the vtables if we emit any
1588 for (vtbl = CLASSTYPE_VTABLES (ctype); vtbl; vtbl = TREE_CHAIN (vtbl))
1590 /* Mark entities references from the virtual table as used. */
1591 mark_vtable_entries (vtbl);
1593 if (TREE_TYPE (DECL_INITIAL (vtbl)) == 0)
1595 tree expr = store_init_value (vtbl, DECL_INITIAL (vtbl));
1597 /* It had better be all done at compile-time. */
1602 DECL_EXTERNAL (vtbl) = 0;
1603 rest_of_decl_compilation (vtbl, 1, 1);
1605 /* Because we're only doing syntax-checking, we'll never end up
1606 actually marking the variable as written. */
1607 if (flag_syntax_only)
1608 TREE_ASM_WRITTEN (vtbl) = 1;
1611 /* Since we're writing out the vtable here, also write the debug
1613 note_debug_info_needed (ctype);
1618 /* Like c_determine_visibility, but with additional C++-specific
1622 determine_visibility (tree decl)
1626 /* Cloned constructors and destructors get the same visibility as
1627 the underlying function. That should be set up in
1628 maybe_clone_body. */
1629 gcc_assert (!DECL_CLONED_FUNCTION_P (decl));
1631 /* Give the common code a chance to make a determination. */
1632 if (c_determine_visibility (decl))
1635 /* If DECL is a member of a class, visibility specifiers on the
1636 class can influence the visibility of the DECL. */
1637 if (DECL_CLASS_SCOPE_P (decl))
1638 class_type = DECL_CONTEXT (decl);
1639 else if (TREE_CODE (decl) == VAR_DECL
1640 && DECL_TINFO_P (decl)
1641 && CLASS_TYPE_P (TREE_TYPE (DECL_NAME (decl))))
1642 class_type = TREE_TYPE (DECL_NAME (decl));
1645 /* Virtual tables have DECL_CONTEXT set to their associated class,
1646 so they are automatically handled above. */
1647 gcc_assert (TREE_CODE (decl) != VAR_DECL
1648 || !DECL_VTABLE_OR_VTT_P (decl));
1649 /* Entities not associated with any class just get the
1650 visibility specified by their attributes. */
1654 /* By default, static data members and function members receive
1655 the visibility of their containing class. */
1658 if (TREE_CODE (decl) == VAR_DECL
1659 && targetm.cxx.export_class_data ()
1660 && (DECL_TINFO_P (decl)
1661 || (DECL_VTABLE_OR_VTT_P (decl)
1662 /* Construction virtual tables are not emitted
1663 because they cannot be referred to from other
1664 object files; their name is not standardized by
1666 && !DECL_CONSTRUCTION_VTABLE_P (decl))))
1667 DECL_VISIBILITY (decl) = VISIBILITY_DEFAULT;
1668 else if (TARGET_DLLIMPORT_DECL_ATTRIBUTES
1669 && lookup_attribute ("dllexport", TYPE_ATTRIBUTES (class_type)))
1671 DECL_VISIBILITY (decl) = VISIBILITY_DEFAULT;
1672 DECL_VISIBILITY_SPECIFIED (decl) = 1;
1674 else if (TREE_CODE (decl) == FUNCTION_DECL
1675 && DECL_DECLARED_INLINE_P (decl)
1676 && visibility_options.inlines_hidden)
1678 DECL_VISIBILITY (decl) = VISIBILITY_HIDDEN;
1679 DECL_VISIBILITY_SPECIFIED (decl) = 1;
1683 DECL_VISIBILITY (decl) = CLASSTYPE_VISIBILITY (class_type);
1684 DECL_VISIBILITY_SPECIFIED (decl)
1685 = CLASSTYPE_VISIBILITY_SPECIFIED (class_type);
1690 /* DECL is a FUNCTION_DECL or VAR_DECL. If the object file linkage
1691 for DECL has not already been determined, do so now by setting
1692 DECL_EXTERNAL, DECL_COMDAT and other related flags. Until this
1693 function is called entities with vague linkage whose definitions
1694 are available must have TREE_PUBLIC set.
1696 If this function decides to place DECL in COMDAT, it will set
1697 appropriate flags -- but will not clear DECL_EXTERNAL. It is up to
1698 the caller to decide whether or not to clear DECL_EXTERNAL. Some
1699 callers defer that decision until it is clear that DECL is actually
1703 import_export_decl (tree decl)
1709 if (DECL_INTERFACE_KNOWN (decl))
1712 /* We cannot determine what linkage to give to an entity with vague
1713 linkage until the end of the file. For example, a virtual table
1714 for a class will be defined if and only if the key method is
1715 defined in this translation unit. As a further example, consider
1716 that when compiling a translation unit that uses PCH file with
1717 "-frepo" it would be incorrect to make decisions about what
1718 entities to emit when building the PCH; those decisions must be
1719 delayed until the repository information has been processed. */
1720 gcc_assert (at_eof);
1721 /* Object file linkage for explicit instantiations is handled in
1722 mark_decl_instantiated. For static variables in functions with
1723 vague linkage, maybe_commonize_var is used.
1725 Therefore, the only declarations that should be provided to this
1726 function are those with external linkage that:
1728 * implicit instantiations of function templates
1732 * implicit instantiations of static data members of class
1739 Furthermore, all entities that reach this point must have a
1740 definition available in this translation unit.
1742 The following assertions check these conditions. */
1743 gcc_assert (TREE_CODE (decl) == FUNCTION_DECL
1744 || TREE_CODE (decl) == VAR_DECL);
1745 /* Any code that creates entities with TREE_PUBLIC cleared should
1746 also set DECL_INTERFACE_KNOWN. */
1747 gcc_assert (TREE_PUBLIC (decl));
1748 if (TREE_CODE (decl) == FUNCTION_DECL)
1749 gcc_assert (DECL_IMPLICIT_INSTANTIATION (decl)
1750 || DECL_FRIEND_PSEUDO_TEMPLATE_INSTANTIATION (decl)
1751 || DECL_DECLARED_INLINE_P (decl));
1753 gcc_assert (DECL_IMPLICIT_INSTANTIATION (decl)
1754 || DECL_VTABLE_OR_VTT_P (decl)
1755 || DECL_TINFO_P (decl));
1756 /* Check that a definition of DECL is available in this translation
1758 gcc_assert (!DECL_REALLY_EXTERN (decl));
1760 /* Assume that DECL will not have COMDAT linkage. */
1762 /* Assume that DECL will not be imported into this translation
1766 /* See if the repository tells us whether or not to emit DECL in
1767 this translation unit. */
1768 emit_p = repo_emit_p (decl);
1771 else if (emit_p == 1)
1773 /* The repository indicates that this entity should be defined
1774 here. Make sure the back end honors that request. */
1775 if (TREE_CODE (decl) == VAR_DECL)
1777 else if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl)
1778 || DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P (decl))
1781 FOR_EACH_CLONE (clone, decl)
1782 mark_needed (clone);
1786 /* Output the definition as an ordinary strong definition. */
1787 DECL_EXTERNAL (decl) = 0;
1788 DECL_INTERFACE_KNOWN (decl) = 1;
1793 /* We have already decided what to do with this DECL; there is no
1794 need to check anything further. */
1796 else if (TREE_CODE (decl) == VAR_DECL && DECL_VTABLE_OR_VTT_P (decl))
1798 tree type = DECL_CONTEXT (decl);
1799 import_export_class (type);
1800 if (TYPE_FOR_JAVA (type))
1802 else if (CLASSTYPE_INTERFACE_KNOWN (type)
1803 && CLASSTYPE_INTERFACE_ONLY (type))
1805 else if (TARGET_WEAK_NOT_IN_ARCHIVE_TOC
1806 && !CLASSTYPE_USE_TEMPLATE (type)
1807 && CLASSTYPE_KEY_METHOD (type)
1808 && !DECL_DECLARED_INLINE_P (CLASSTYPE_KEY_METHOD (type)))
1809 /* The ABI requires that all virtual tables be emitted with
1810 COMDAT linkage. However, on systems where COMDAT symbols
1811 don't show up in the table of contents for a static
1812 archive, the linker will report errors about undefined
1813 symbols because it will not see the virtual table
1814 definition. Therefore, in the case that we know that the
1815 virtual table will be emitted in only one translation
1816 unit, we make the virtual table an ordinary definition
1817 with external linkage. */
1818 DECL_EXTERNAL (decl) = 0;
1819 else if (CLASSTYPE_INTERFACE_KNOWN (type))
1821 /* TYPE is being exported from this translation unit, so DECL
1822 should be defined here. The ABI requires COMDAT
1823 linkage. Normally, we only emit COMDAT things when they
1824 are needed; make sure that we realize that this entity is
1829 else if (!flag_implicit_templates
1830 && CLASSTYPE_IMPLICIT_INSTANTIATION (type))
1835 else if (TREE_CODE (decl) == VAR_DECL && DECL_TINFO_P (decl))
1837 tree type = TREE_TYPE (DECL_NAME (decl));
1838 if (CLASS_TYPE_P (type))
1840 import_export_class (type);
1841 if (CLASSTYPE_INTERFACE_KNOWN (type)
1842 && TYPE_POLYMORPHIC_P (type)
1843 && CLASSTYPE_INTERFACE_ONLY (type)
1844 /* If -fno-rtti was specified, then we cannot be sure
1845 that RTTI information will be emitted with the
1846 virtual table of the class, so we must emit it
1847 wherever it is used. */
1853 if (CLASSTYPE_INTERFACE_KNOWN (type)
1854 && !CLASSTYPE_INTERFACE_ONLY (type))
1861 else if (DECL_TEMPLATE_INSTANTIATION (decl)
1862 || DECL_FRIEND_PSEUDO_TEMPLATE_INSTANTIATION (decl))
1864 /* DECL is an implicit instantiation of a function or static
1866 if (flag_implicit_templates
1867 || (flag_implicit_inline_templates
1868 && TREE_CODE (decl) == FUNCTION_DECL
1869 && DECL_DECLARED_INLINE_P (decl)))
1872 /* If we are not implicitly generating templates, then mark
1873 this entity as undefined in this translation unit. */
1876 else if (DECL_FUNCTION_MEMBER_P (decl))
1878 if (!DECL_DECLARED_INLINE_P (decl))
1880 tree ctype = DECL_CONTEXT (decl);
1881 import_export_class (ctype);
1882 if (CLASSTYPE_INTERFACE_KNOWN (ctype))
1884 DECL_NOT_REALLY_EXTERN (decl)
1885 = ! (CLASSTYPE_INTERFACE_ONLY (ctype)
1886 || (DECL_DECLARED_INLINE_P (decl)
1887 && ! flag_implement_inlines
1888 && !DECL_VINDEX (decl)));
1890 if (!DECL_NOT_REALLY_EXTERN (decl))
1891 DECL_EXTERNAL (decl) = 1;
1893 /* Always make artificials weak. */
1894 if (DECL_ARTIFICIAL (decl) && flag_weak)
1897 maybe_make_one_only (decl);
1908 /* If we are importing DECL into this translation unit, mark is
1909 an undefined here. */
1910 DECL_EXTERNAL (decl) = 1;
1911 DECL_NOT_REALLY_EXTERN (decl) = 0;
1915 /* If we decided to put DECL in COMDAT, mark it accordingly at
1917 comdat_linkage (decl);
1920 DECL_INTERFACE_KNOWN (decl) = 1;
1923 /* Return an expression that performs the destruction of DECL, which
1924 must be a VAR_DECL whose type has a non-trivial destructor, or is
1925 an array whose (innermost) elements have a non-trivial destructor. */
1928 build_cleanup (tree decl)
1931 tree type = TREE_TYPE (decl);
1933 /* This function should only be called for declarations that really
1934 require cleanups. */
1935 gcc_assert (!TYPE_HAS_TRIVIAL_DESTRUCTOR (type));
1937 /* Treat all objects with destructors as used; the destructor may do
1938 something substantive. */
1941 if (TREE_CODE (type) == ARRAY_TYPE)
1945 cxx_mark_addressable (decl);
1946 temp = build1 (ADDR_EXPR, build_pointer_type (type), decl);
1948 temp = build_delete (TREE_TYPE (temp), temp,
1949 sfk_complete_destructor,
1950 LOOKUP_NORMAL|LOOKUP_NONVIRTUAL|LOOKUP_DESTRUCTOR, 0);
1954 /* Returns the initialization guard variable for the variable DECL,
1955 which has static storage duration. */
1958 get_guard (tree decl)
1963 sname = mangle_guard_variable (decl);
1964 guard = IDENTIFIER_GLOBAL_VALUE (sname);
1969 /* We use a type that is big enough to contain a mutex as well
1970 as an integer counter. */
1971 guard_type = targetm.cxx.guard_type ();
1972 guard = build_decl (VAR_DECL, sname, guard_type);
1974 /* The guard should have the same linkage as what it guards. */
1975 TREE_PUBLIC (guard) = TREE_PUBLIC (decl);
1976 TREE_STATIC (guard) = TREE_STATIC (decl);
1977 DECL_COMMON (guard) = DECL_COMMON (decl);
1978 DECL_ONE_ONLY (guard) = DECL_ONE_ONLY (decl);
1979 if (TREE_PUBLIC (decl))
1980 DECL_WEAK (guard) = DECL_WEAK (decl);
1982 DECL_ARTIFICIAL (guard) = 1;
1983 TREE_USED (guard) = 1;
1984 pushdecl_top_level_and_finish (guard, NULL_TREE);
1989 /* Return those bits of the GUARD variable that should be set when the
1990 guarded entity is actually initialized. */
1993 get_guard_bits (tree guard)
1995 if (!targetm.cxx.guard_mask_bit ())
1997 /* We only set the first byte of the guard, in order to leave room
1998 for a mutex in the high-order bits. */
1999 guard = build1 (ADDR_EXPR,
2000 build_pointer_type (TREE_TYPE (guard)),
2002 guard = build1 (NOP_EXPR,
2003 build_pointer_type (char_type_node),
2005 guard = build1 (INDIRECT_REF, char_type_node, guard);
2011 /* Return an expression which determines whether or not the GUARD
2012 variable has already been initialized. */
2015 get_guard_cond (tree guard)
2019 /* Check to see if the GUARD is zero. */
2020 guard = get_guard_bits (guard);
2022 /* Mask off all but the low bit. */
2023 if (targetm.cxx.guard_mask_bit ())
2025 guard_value = integer_one_node;
2026 if (!same_type_p (TREE_TYPE (guard_value), TREE_TYPE (guard)))
2027 guard_value = convert (TREE_TYPE (guard), guard_value);
2028 guard = cp_build_binary_op (BIT_AND_EXPR, guard, guard_value);
2031 guard_value = integer_zero_node;
2032 if (!same_type_p (TREE_TYPE (guard_value), TREE_TYPE (guard)))
2033 guard_value = convert (TREE_TYPE (guard), guard_value);
2034 return cp_build_binary_op (EQ_EXPR, guard, guard_value);
2037 /* Return an expression which sets the GUARD variable, indicating that
2038 the variable being guarded has been initialized. */
2041 set_guard (tree guard)
2045 /* Set the GUARD to one. */
2046 guard = get_guard_bits (guard);
2047 guard_init = integer_one_node;
2048 if (!same_type_p (TREE_TYPE (guard_init), TREE_TYPE (guard)))
2049 guard_init = convert (TREE_TYPE (guard), guard_init);
2050 return build_modify_expr (guard, NOP_EXPR, guard_init);
2053 /* Start the process of running a particular set of global constructors
2054 or destructors. Subroutine of do_[cd]tors. */
2057 start_objects (int method_type, int initp)
2063 /* Make ctor or dtor function. METHOD_TYPE may be 'I' or 'D'. */
2065 if (initp != DEFAULT_INIT_PRIORITY)
2075 sprintf (type, "%c%c%.5u", method_type, joiner, initp);
2078 sprintf (type, "%c", method_type);
2080 fndecl = build_lang_decl (FUNCTION_DECL,
2081 get_file_function_name_long (type),
2082 build_function_type (void_type_node,
2084 start_preparsed_function (fndecl, /*attrs=*/NULL_TREE, SF_PRE_PARSED);
2086 /* It can be a static function as long as collect2 does not have
2087 to scan the object file to find its ctor/dtor routine. */
2088 TREE_PUBLIC (current_function_decl) = ! targetm.have_ctors_dtors;
2090 /* Mark this declaration as used to avoid spurious warnings. */
2091 TREE_USED (current_function_decl) = 1;
2093 /* Mark this function as a global constructor or destructor. */
2094 if (method_type == 'I')
2095 DECL_GLOBAL_CTOR_P (current_function_decl) = 1;
2097 DECL_GLOBAL_DTOR_P (current_function_decl) = 1;
2098 DECL_LANG_SPECIFIC (current_function_decl)->decl_flags.u2sel = 1;
2100 body = begin_compound_stmt (BCS_FN_BODY);
2102 /* We cannot allow these functions to be elided, even if they do not
2103 have external linkage. And, there's no point in deferring
2104 compilation of thes functions; they're all going to have to be
2106 DECL_INLINE (current_function_decl) = 0;
2107 DECL_UNINLINABLE (current_function_decl) = 1;
2112 /* Finish the process of running a particular set of global constructors
2113 or destructors. Subroutine of do_[cd]tors. */
2116 finish_objects (int method_type, int initp, tree body)
2121 finish_compound_stmt (body);
2122 fn = finish_function (0);
2123 expand_or_defer_fn (fn);
2125 /* When only doing semantic analysis, and no RTL generation, we
2126 can't call functions that directly emit assembly code; there is
2127 no assembly file in which to put the code. */
2128 if (flag_syntax_only)
2131 if (targetm.have_ctors_dtors)
2133 rtx fnsym = XEXP (DECL_RTL (fn), 0);
2134 if (method_type == 'I')
2135 (* targetm.asm_out.constructor) (fnsym, initp);
2137 (* targetm.asm_out.destructor) (fnsym, initp);
2141 /* The names of the parameters to the function created to handle
2142 initializations and destructions for objects with static storage
2144 #define INITIALIZE_P_IDENTIFIER "__initialize_p"
2145 #define PRIORITY_IDENTIFIER "__priority"
2147 /* The name of the function we create to handle initializations and
2148 destructions for objects with static storage duration. */
2149 #define SSDF_IDENTIFIER "__static_initialization_and_destruction"
2151 /* The declaration for the __INITIALIZE_P argument. */
2152 static GTY(()) tree initialize_p_decl;
2154 /* The declaration for the __PRIORITY argument. */
2155 static GTY(()) tree priority_decl;
2157 /* The declaration for the static storage duration function. */
2158 static GTY(()) tree ssdf_decl;
2160 /* All the static storage duration functions created in this
2161 translation unit. */
2162 static GTY(()) varray_type ssdf_decls;
2164 /* A map from priority levels to information about that priority
2165 level. There may be many such levels, so efficient lookup is
2167 static splay_tree priority_info_map;
2169 /* Begins the generation of the function that will handle all
2170 initialization and destruction of objects with static storage
2171 duration. The function generated takes two parameters of type
2172 `int': __INITIALIZE_P and __PRIORITY. If __INITIALIZE_P is
2173 nonzero, it performs initializations. Otherwise, it performs
2174 destructions. It only performs those initializations or
2175 destructions with the indicated __PRIORITY. The generated function
2178 It is assumed that this function will only be called once per
2179 translation unit. */
2182 start_static_storage_duration_function (unsigned count)
2187 char id[sizeof (SSDF_IDENTIFIER) + 1 /* '\0' */ + 32];
2189 /* Create the identifier for this function. It will be of the form
2190 SSDF_IDENTIFIER_<number>. */
2191 sprintf (id, "%s_%u", SSDF_IDENTIFIER, count);
2193 /* Create the parameters. */
2194 parm_types = void_list_node;
2195 parm_types = tree_cons (NULL_TREE, integer_type_node, parm_types);
2196 parm_types = tree_cons (NULL_TREE, integer_type_node, parm_types);
2197 type = build_function_type (void_type_node, parm_types);
2199 /* Create the FUNCTION_DECL itself. */
2200 ssdf_decl = build_lang_decl (FUNCTION_DECL,
2201 get_identifier (id),
2203 TREE_PUBLIC (ssdf_decl) = 0;
2204 DECL_ARTIFICIAL (ssdf_decl) = 1;
2206 /* Put this function in the list of functions to be called from the
2207 static constructors and destructors. */
2210 VARRAY_TREE_INIT (ssdf_decls, 32, "ssdf_decls");
2212 /* Take this opportunity to initialize the map from priority
2213 numbers to information about that priority level. */
2214 priority_info_map = splay_tree_new (splay_tree_compare_ints,
2215 /*delete_key_fn=*/0,
2216 /*delete_value_fn=*/
2217 (splay_tree_delete_value_fn) &free);
2219 /* We always need to generate functions for the
2220 DEFAULT_INIT_PRIORITY so enter it now. That way when we walk
2221 priorities later, we'll be sure to find the
2222 DEFAULT_INIT_PRIORITY. */
2223 get_priority_info (DEFAULT_INIT_PRIORITY);
2226 VARRAY_PUSH_TREE (ssdf_decls, ssdf_decl);
2228 /* Create the argument list. */
2229 initialize_p_decl = cp_build_parm_decl
2230 (get_identifier (INITIALIZE_P_IDENTIFIER), integer_type_node);
2231 DECL_CONTEXT (initialize_p_decl) = ssdf_decl;
2232 TREE_USED (initialize_p_decl) = 1;
2233 priority_decl = cp_build_parm_decl
2234 (get_identifier (PRIORITY_IDENTIFIER), integer_type_node);
2235 DECL_CONTEXT (priority_decl) = ssdf_decl;
2236 TREE_USED (priority_decl) = 1;
2238 TREE_CHAIN (initialize_p_decl) = priority_decl;
2239 DECL_ARGUMENTS (ssdf_decl) = initialize_p_decl;
2241 /* Put the function in the global scope. */
2242 pushdecl (ssdf_decl);
2244 /* Start the function itself. This is equivalent to declaring the
2247 static void __ssdf (int __initialize_p, init __priority_p);
2249 It is static because we only need to call this function from the
2250 various constructor and destructor functions for this module. */
2251 start_preparsed_function (ssdf_decl,
2252 /*attrs=*/NULL_TREE,
2255 /* Set up the scope of the outermost block in the function. */
2256 body = begin_compound_stmt (BCS_FN_BODY);
2258 /* This function must not be deferred because we are depending on
2259 its compilation to tell us what is TREE_SYMBOL_REFERENCED. */
2260 DECL_INLINE (ssdf_decl) = 0;
2261 DECL_UNINLINABLE (ssdf_decl) = 1;
2266 /* Finish the generation of the function which performs initialization
2267 and destruction of objects with static storage duration. After
2268 this point, no more such objects can be created. */
2271 finish_static_storage_duration_function (tree body)
2273 /* Close out the function. */
2274 finish_compound_stmt (body);
2275 expand_or_defer_fn (finish_function (0));
2278 /* Return the information about the indicated PRIORITY level. If no
2279 code to handle this level has yet been generated, generate the
2280 appropriate prologue. */
2282 static priority_info
2283 get_priority_info (int priority)
2288 n = splay_tree_lookup (priority_info_map,
2289 (splay_tree_key) priority);
2292 /* Create a new priority information structure, and insert it
2294 pi = xmalloc (sizeof (struct priority_info_s));
2295 pi->initializations_p = 0;
2296 pi->destructions_p = 0;
2297 splay_tree_insert (priority_info_map,
2298 (splay_tree_key) priority,
2299 (splay_tree_value) pi);
2302 pi = (priority_info) n->value;
2307 /* Set up to handle the initialization or destruction of DECL. If
2308 INITP is nonzero, we are initializing the variable. Otherwise, we
2309 are destroying it. */
2312 start_static_initialization_or_destruction (tree decl, int initp)
2314 tree guard_if_stmt = NULL_TREE;
2321 /* Figure out the priority for this declaration. */
2322 priority = DECL_INIT_PRIORITY (decl);
2324 priority = DEFAULT_INIT_PRIORITY;
2326 /* Remember that we had an initialization or finalization at this
2328 pi = get_priority_info (priority);
2330 pi->initializations_p = 1;
2332 pi->destructions_p = 1;
2334 /* Trick the compiler into thinking we are at the file and line
2335 where DECL was declared so that error-messages make sense, and so
2336 that the debugger will show somewhat sensible file and line
2338 input_location = DECL_SOURCE_LOCATION (decl);
2344 Access control for implicit calls to the constructors,
2345 the conversion functions, or the destructor called to
2346 create and destroy a static data member is performed as
2347 if these calls appeared in the scope of the member's
2350 we pretend we are in a static member function of the class of
2351 which the DECL is a member. */
2352 if (member_p (decl))
2354 DECL_CONTEXT (current_function_decl) = DECL_CONTEXT (decl);
2355 DECL_STATIC_FUNCTION_P (current_function_decl) = 1;
2358 /* Conditionalize this initialization on being in the right priority
2359 and being initializing/finalizing appropriately. */
2360 guard_if_stmt = begin_if_stmt ();
2361 cond = cp_build_binary_op (EQ_EXPR,
2363 build_int_cst (NULL_TREE, priority));
2364 init_cond = initp ? integer_one_node : integer_zero_node;
2365 init_cond = cp_build_binary_op (EQ_EXPR,
2368 cond = cp_build_binary_op (TRUTH_ANDIF_EXPR, cond, init_cond);
2370 /* Assume we don't need a guard. */
2372 /* We need a guard if this is an object with external linkage that
2373 might be initialized in more than one place. (For example, a
2374 static data member of a template, when the data member requires
2376 if (TREE_PUBLIC (decl) && (DECL_COMMON (decl)
2377 || DECL_ONE_ONLY (decl)
2378 || DECL_WEAK (decl)))
2382 guard = get_guard (decl);
2384 /* When using __cxa_atexit, we just check the GUARD as we would
2385 for a local static. */
2386 if (flag_use_cxa_atexit)
2388 /* When using __cxa_atexit, we never try to destroy
2389 anything from a static destructor. */
2391 guard_cond = get_guard_cond (guard);
2393 /* If we don't have __cxa_atexit, then we will be running
2394 destructors from .fini sections, or their equivalents. So,
2395 we need to know how many times we've tried to initialize this
2396 object. We do initializations only if the GUARD is zero,
2397 i.e., if we are the first to initialize the variable. We do
2398 destructions only if the GUARD is one, i.e., if we are the
2399 last to destroy the variable. */
2402 = cp_build_binary_op (EQ_EXPR,
2403 build_unary_op (PREINCREMENT_EXPR,
2409 = cp_build_binary_op (EQ_EXPR,
2410 build_unary_op (PREDECREMENT_EXPR,
2415 cond = cp_build_binary_op (TRUTH_ANDIF_EXPR, cond, guard_cond);
2418 finish_if_stmt_cond (cond, guard_if_stmt);
2420 /* If we're using __cxa_atexit, we have not already set the GUARD,
2421 so we must do so now. */
2422 if (guard && initp && flag_use_cxa_atexit)
2423 finish_expr_stmt (set_guard (guard));
2425 return guard_if_stmt;
2428 /* We've just finished generating code to do an initialization or
2429 finalization. GUARD_IF_STMT is the if-statement we used to guard
2430 the initialization. */
2433 finish_static_initialization_or_destruction (tree guard_if_stmt)
2435 finish_then_clause (guard_if_stmt);
2436 finish_if_stmt (guard_if_stmt);
2438 /* Now that we're done with DECL we don't need to pretend to be a
2439 member of its class any longer. */
2440 DECL_CONTEXT (current_function_decl) = NULL_TREE;
2441 DECL_STATIC_FUNCTION_P (current_function_decl) = 0;
2444 /* Generate code to do the initialization of DECL, a VAR_DECL with
2445 static storage duration. The initialization is INIT. */
2448 do_static_initialization (tree decl, tree init)
2452 /* Set up for the initialization. */
2454 = start_static_initialization_or_destruction (decl,
2457 /* Perform the initialization. */
2459 finish_expr_stmt (init);
2461 /* If we're using __cxa_atexit, register a a function that calls the
2462 destructor for the object. */
2463 if (flag_use_cxa_atexit)
2464 finish_expr_stmt (register_dtor_fn (decl));
2467 finish_static_initialization_or_destruction (guard_if_stmt);
2470 /* Generate code to do the static destruction of DECL. If DECL may be
2471 initialized more than once in different object files, GUARD is the
2472 guard variable to check. PRIORITY is the priority for the
2476 do_static_destruction (tree decl)
2480 /* If we're using __cxa_atexit, then destructors are registered
2481 immediately after objects are initialized. */
2482 gcc_assert (!flag_use_cxa_atexit);
2484 /* If we don't need a destructor, there's nothing to do. */
2485 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
2488 /* Actually do the destruction. */
2489 guard_if_stmt = start_static_initialization_or_destruction (decl,
2491 finish_expr_stmt (build_cleanup (decl));
2492 finish_static_initialization_or_destruction (guard_if_stmt);
2495 /* VARS is a list of variables with static storage duration which may
2496 need initialization and/or finalization. Remove those variables
2497 that don't really need to be initialized or finalized, and return
2498 the resulting list. The order in which the variables appear in
2499 VARS is in reverse order of the order in which they should actually
2500 be initialized. The list we return is in the unreversed order;
2501 i.e., the first variable should be initialized first. */
2504 prune_vars_needing_no_initialization (tree *vars)
2507 tree result = NULL_TREE;
2512 tree decl = TREE_VALUE (t);
2513 tree init = TREE_PURPOSE (t);
2515 /* Deal gracefully with error. */
2516 if (decl == error_mark_node)
2518 var = &TREE_CHAIN (t);
2522 /* The only things that can be initialized are variables. */
2523 gcc_assert (TREE_CODE (decl) == VAR_DECL);
2525 /* If this object is not defined, we don't need to do anything
2527 if (DECL_EXTERNAL (decl))
2529 var = &TREE_CHAIN (t);
2533 /* Also, if the initializer already contains errors, we can bail
2535 if (init && TREE_CODE (init) == TREE_LIST
2536 && value_member (error_mark_node, init))
2538 var = &TREE_CHAIN (t);
2542 /* This variable is going to need initialization and/or
2543 finalization, so we add it to the list. */
2544 *var = TREE_CHAIN (t);
2545 TREE_CHAIN (t) = result;
2552 /* Make sure we have told the back end about all the variables in
2556 write_out_vars (tree vars)
2560 for (v = vars; v; v = TREE_CHAIN (v))
2562 tree var = TREE_VALUE (v);
2563 if (!var_finalized_p (var))
2565 import_export_decl (var);
2566 rest_of_decl_compilation (var, 1, 1);
2571 /* Generate a static constructor (if CONSTRUCTOR_P) or destructor
2572 (otherwise) that will initialize all gobal objects with static
2573 storage duration having the indicated PRIORITY. */
2576 generate_ctor_or_dtor_function (bool constructor_p, int priority,
2585 input_location = *locus;
2586 #ifdef USE_MAPPED_LOCATION
2592 /* We use `I' to indicate initialization and `D' to indicate
2594 function_key = constructor_p ? 'I' : 'D';
2596 /* We emit the function lazily, to avoid generating empty
2597 global constructors and destructors. */
2600 /* Call the static storage duration function with appropriate
2603 for (i = 0; i < ssdf_decls->elements_used; ++i)
2605 fndecl = VARRAY_TREE (ssdf_decls, i);
2607 /* Calls to pure or const functions will expand to nothing. */
2608 if (! (flags_from_decl_or_type (fndecl) & (ECF_CONST | ECF_PURE)))
2611 body = start_objects (function_key, priority);
2613 arguments = tree_cons (NULL_TREE,
2614 build_int_cst (NULL_TREE, priority),
2616 arguments = tree_cons (NULL_TREE,
2617 build_int_cst (NULL_TREE, constructor_p),
2619 finish_expr_stmt (build_function_call (fndecl, arguments));
2623 /* If we're generating code for the DEFAULT_INIT_PRIORITY, throw in
2624 calls to any functions marked with attributes indicating that
2625 they should be called at initialization- or destruction-time. */
2626 if (priority == DEFAULT_INIT_PRIORITY)
2630 for (fns = constructor_p ? static_ctors : static_dtors;
2632 fns = TREE_CHAIN (fns))
2634 fndecl = TREE_VALUE (fns);
2636 /* Calls to pure/const functions will expand to nothing. */
2637 if (! (flags_from_decl_or_type (fndecl) & (ECF_CONST | ECF_PURE)))
2640 body = start_objects (function_key, priority);
2641 finish_expr_stmt (build_function_call (fndecl, NULL_TREE));
2646 /* Close out the function. */
2648 finish_objects (function_key, priority, body);
2651 /* Generate constructor and destructor functions for the priority
2655 generate_ctor_and_dtor_functions_for_priority (splay_tree_node n, void * data)
2657 location_t *locus = data;
2658 int priority = (int) n->key;
2659 priority_info pi = (priority_info) n->value;
2661 /* Generate the functions themselves, but only if they are really
2663 if (pi->initializations_p
2664 || (priority == DEFAULT_INIT_PRIORITY && static_ctors))
2665 generate_ctor_or_dtor_function (/*constructor_p=*/true, priority, locus);
2666 if (pi->destructions_p
2667 || (priority == DEFAULT_INIT_PRIORITY && static_dtors))
2668 generate_ctor_or_dtor_function (/*constructor_p=*/false, priority, locus);
2670 /* Keep iterating. */
2674 /* Called via LANGHOOK_CALLGRAPH_ANALYZE_EXPR. It is supposed to mark
2675 decls referenced from frontend specific constructs; it will be called
2676 only for language-specific tree nodes.
2678 Here we must deal with member pointers. */
2681 cxx_callgraph_analyze_expr (tree *tp, int *walk_subtrees ATTRIBUTE_UNUSED,
2682 tree from ATTRIBUTE_UNUSED)
2686 switch (TREE_CODE (t))
2689 if (TYPE_PTRMEMFUNC_P (TREE_TYPE (t)))
2690 cgraph_mark_needed_node (cgraph_node (PTRMEM_CST_MEMBER (t)));
2693 if (TREE_CODE (BASELINK_FUNCTIONS (t)) == FUNCTION_DECL)
2694 cgraph_mark_needed_node (cgraph_node (BASELINK_FUNCTIONS (t)));
2697 if (DECL_VTABLE_OR_VTT_P (t))
2699 /* The ABI requires that all virtual tables be emitted
2700 whenever one of them is. */
2702 for (vtbl = CLASSTYPE_VTABLES (DECL_CONTEXT (t));
2704 vtbl = TREE_CHAIN (vtbl))
2705 mark_decl_referenced (vtbl);
2707 else if (DECL_CONTEXT (t)
2708 && TREE_CODE (DECL_CONTEXT (t)) == FUNCTION_DECL)
2709 /* If we need a static variable in a function, then we
2710 need the containing function. */
2711 mark_decl_referenced (DECL_CONTEXT (t));
2720 /* This routine is called from the last rule in yyparse ().
2721 Its job is to create all the code needed to initialize and
2722 destroy the global aggregates. We do the destruction
2723 first, since that way we only need to reverse the decls once. */
2726 cp_finish_file (void)
2732 unsigned ssdf_count = 0;
2735 locus = input_location;
2738 /* Bad parse errors. Just forget about it. */
2739 if (! global_bindings_p () || current_class_type || decl_namespace_list)
2743 c_common_write_pch ();
2745 #ifdef USE_MAPPED_LOCATION
2748 /* Otherwise, GDB can get confused, because in only knows
2749 about source for LINENO-1 lines. */
2753 interface_unknown = 1;
2756 /* We now have to write out all the stuff we put off writing out.
2759 o Template specializations that we have not yet instantiated,
2760 but which are needed.
2761 o Initialization and destruction for non-local objects with
2762 static storage duration. (Local objects with static storage
2763 duration are initialized when their scope is first entered,
2764 and are cleaned up via atexit.)
2765 o Virtual function tables.
2767 All of these may cause others to be needed. For example,
2768 instantiating one function may cause another to be needed, and
2769 generating the initializer for an object may cause templates to be
2770 instantiated, etc., etc. */
2772 timevar_push (TV_VARCONST);
2774 emit_support_tinfos ();
2779 size_t n_old, n_new;
2783 /* If there are templates that we've put off instantiating, do
2785 instantiate_pending_templates (retries);
2788 /* Write out virtual tables as required. Note that writing out
2789 the virtual table for a template class may cause the
2790 instantiation of members of that class. If we write out
2791 vtables then we remove the class from our list so we don't
2792 have to look at it again. */
2794 while (keyed_classes != NULL_TREE
2795 && maybe_emit_vtables (TREE_VALUE (keyed_classes)))
2798 keyed_classes = TREE_CHAIN (keyed_classes);
2804 tree next = TREE_CHAIN (t);
2808 if (maybe_emit_vtables (TREE_VALUE (next)))
2811 TREE_CHAIN (t) = TREE_CHAIN (next);
2816 next = TREE_CHAIN (t);
2820 /* Write out needed type info variables. We have to be careful
2821 looping through unemitted decls, because emit_tinfo_decl may
2822 cause other variables to be needed. We stick new elements
2823 (and old elements that we may need to reconsider) at the end
2824 of the array, then shift them back to the beginning once we're
2827 n_old = VARRAY_ACTIVE_SIZE (unemitted_tinfo_decls);
2828 for (i = 0; i < n_old; ++i)
2830 tree tinfo_decl = VARRAY_TREE (unemitted_tinfo_decls, i);
2831 if (emit_tinfo_decl (tinfo_decl))
2834 VARRAY_PUSH_TREE (unemitted_tinfo_decls, tinfo_decl);
2837 /* The only elements we want to keep are the new ones. Copy
2838 them to the beginning of the array, then get rid of the
2840 n_new = VARRAY_ACTIVE_SIZE (unemitted_tinfo_decls) - n_old;
2842 memmove (&VARRAY_TREE (unemitted_tinfo_decls, 0),
2843 &VARRAY_TREE (unemitted_tinfo_decls, n_old),
2844 n_new * sizeof (tree));
2845 memset (&VARRAY_TREE (unemitted_tinfo_decls, n_new),
2846 0, n_old * sizeof (tree));
2847 VARRAY_ACTIVE_SIZE (unemitted_tinfo_decls) = n_new;
2849 /* The list of objects with static storage duration is built up
2850 in reverse order. We clear STATIC_AGGREGATES so that any new
2851 aggregates added during the initialization of these will be
2852 initialized in the correct order when we next come around the
2854 vars = prune_vars_needing_no_initialization (&static_aggregates);
2860 /* We need to start a new initialization function each time
2861 through the loop. That's because we need to know which
2862 vtables have been referenced, and TREE_SYMBOL_REFERENCED
2863 isn't computed until a function is finished, and written
2864 out. That's a deficiency in the back-end. When this is
2865 fixed, these initialization functions could all become
2866 inline, with resulting performance improvements. */
2869 /* Set the line and file, so that it is obviously not from
2871 input_location = locus;
2872 ssdf_body = start_static_storage_duration_function (ssdf_count);
2874 /* Make sure the back end knows about all the variables. */
2875 write_out_vars (vars);
2877 /* First generate code to do all the initializations. */
2878 for (v = vars; v; v = TREE_CHAIN (v))
2879 do_static_initialization (TREE_VALUE (v),
2882 /* Then, generate code to do all the destructions. Do these
2883 in reverse order so that the most recently constructed
2884 variable is the first destroyed. If we're using
2885 __cxa_atexit, then we don't need to do this; functions
2886 were registered at initialization time to destroy the
2888 if (!flag_use_cxa_atexit)
2890 vars = nreverse (vars);
2891 for (v = vars; v; v = TREE_CHAIN (v))
2892 do_static_destruction (TREE_VALUE (v));
2897 /* Finish up the static storage duration function for this
2899 input_location = locus;
2900 finish_static_storage_duration_function (ssdf_body);
2902 /* All those initializations and finalizations might cause
2903 us to need more inline functions, more template
2904 instantiations, etc. */
2907 #ifdef USE_MAPPED_LOCATION
2914 /* Go through the set of inline functions whose bodies have not
2915 been emitted yet. If out-of-line copies of these functions
2916 are required, emit them. */
2917 for (i = 0; i < deferred_fns_used; ++i)
2919 tree decl = VARRAY_TREE (deferred_fns, i);
2921 /* Does it need synthesizing? */
2922 if (DECL_ARTIFICIAL (decl) && ! DECL_INITIAL (decl)
2923 && (! DECL_REALLY_EXTERN (decl) || DECL_INLINE (decl)))
2925 /* Even though we're already at the top-level, we push
2926 there again. That way, when we pop back a few lines
2927 hence, all of our state is restored. Otherwise,
2928 finish_function doesn't clean things up, and we end
2929 up with CURRENT_FUNCTION_DECL set. */
2930 push_to_top_level ();
2931 synthesize_method (decl);
2932 pop_from_top_level ();
2936 if (!DECL_SAVED_TREE (decl))
2939 import_export_decl (decl);
2941 /* We lie to the back-end, pretending that some functions
2942 are not defined when they really are. This keeps these
2943 functions from being put out unnecessarily. But, we must
2944 stop lying when the functions are referenced, or if they
2945 are not comdat since they need to be put out now. This
2946 is done in a separate for cycle, because if some deferred
2947 function is contained in another deferred function later
2948 in deferred_fns varray, rest_of_compilation would skip
2949 this function and we really cannot expand the same
2951 if (DECL_NOT_REALLY_EXTERN (decl)
2952 && DECL_INITIAL (decl)
2953 && decl_needed_p (decl))
2954 DECL_EXTERNAL (decl) = 0;
2956 /* If we're going to need to write this function out, and
2957 there's already a body for it, create RTL for it now.
2958 (There might be no body if this is a method we haven't
2959 gotten around to synthesizing yet.) */
2960 if (!DECL_EXTERNAL (decl)
2961 && decl_needed_p (decl)
2962 && !TREE_ASM_WRITTEN (decl)
2963 && !cgraph_node (decl)->local.finalized)
2965 /* We will output the function; no longer consider it in this
2967 DECL_DEFER_OUTPUT (decl) = 0;
2968 /* Generate RTL for this function now that we know we
2970 expand_or_defer_fn (decl);
2971 /* If we're compiling -fsyntax-only pretend that this
2972 function has been written out so that we don't try to
2974 if (flag_syntax_only)
2975 TREE_ASM_WRITTEN (decl) = 1;
2980 if (walk_namespaces (wrapup_globals_for_namespace, /*data=*/0))
2983 /* Static data members are just like namespace-scope globals. */
2984 for (i = 0; i < pending_statics_used; ++i)
2986 tree decl = VARRAY_TREE (pending_statics, i);
2987 if (var_finalized_p (decl) || DECL_REALLY_EXTERN (decl))
2989 import_export_decl (decl);
2990 /* If this static data member is needed, provide it to the
2992 if (DECL_NOT_REALLY_EXTERN (decl) && decl_needed_p (decl))
2993 DECL_EXTERNAL (decl) = 0;
2996 && wrapup_global_declarations (&VARRAY_TREE (pending_statics, 0),
2997 pending_statics_used))
3000 /* Ask the back end to emit functions and variables that are
3001 enqued. These emissions may result in marking more entities
3003 if (cgraph_assemble_pending_functions ())
3005 if (cgraph_varpool_assemble_pending_decls ())
3012 /* All used inline functions must have a definition at this point. */
3013 for (i = 0; i < deferred_fns_used; ++i)
3015 tree decl = VARRAY_TREE (deferred_fns, i);
3017 if (/* Check online inline functions that were actually used. */
3018 TREE_USED (decl) && DECL_DECLARED_INLINE_P (decl)
3019 /* But not defined. */
3020 && DECL_REALLY_EXTERN (decl)
3021 /* If we decided to emit this function in another
3022 translation unit, the fact that the definition was
3023 missing here likely indicates only that the repository
3024 decided to place the function elsewhere. With -Winline,
3025 we will still warn if we could not inline the
3027 && !flag_use_repository
3028 /* An explicit instantiation can be used to specify
3029 that the body is in another unit. It will have
3030 already verified there was a definition. */
3031 && !DECL_EXPLICIT_INSTANTIATION (decl))
3033 cp_warning_at ("inline function `%D' used but never defined", decl);
3034 /* This symbol is effectively an "extern" declaration now.
3035 This is not strictly necessary, but removes a duplicate
3037 TREE_PUBLIC (decl) = 1;
3041 /* We give C linkage to static constructors and destructors. */
3042 push_lang_context (lang_name_c);
3044 /* Generate initialization and destruction functions for all
3045 priorities for which they are required. */
3046 if (priority_info_map)
3047 splay_tree_foreach (priority_info_map,
3048 generate_ctor_and_dtor_functions_for_priority,
3054 generate_ctor_or_dtor_function (/*constructor_p=*/true,
3055 DEFAULT_INIT_PRIORITY, &locus);
3057 generate_ctor_or_dtor_function (/*constructor_p=*/false,
3058 DEFAULT_INIT_PRIORITY, &locus);
3061 /* We're done with the splay-tree now. */
3062 if (priority_info_map)
3063 splay_tree_delete (priority_info_map);
3065 /* We're done with static constructors, so we can go back to "C++"
3067 pop_lang_context ();
3069 cgraph_finalize_compilation_unit ();
3072 /* Emit mudflap static registration function. This must be done
3073 after all the user functions have been expanded. */
3075 mudflap_finish_file ();
3077 /* Now, issue warnings about static, but not defined, functions,
3078 etc., and emit debugging information. */
3079 walk_namespaces (wrapup_globals_for_namespace, /*data=*/&reconsider);
3080 if (pending_statics)
3081 check_global_declarations (&VARRAY_TREE (pending_statics, 0),
3082 pending_statics_used);
3086 /* The entire file is now complete. If requested, dump everything
3090 FILE *stream = dump_begin (TDI_tu, &flags);
3094 dump_node (global_namespace, flags & ~TDF_SLIM, stream);
3095 dump_end (TDI_tu, stream);
3099 timevar_pop (TV_VARCONST);
3101 if (flag_detailed_statistics)
3103 dump_tree_statistics ();
3104 dump_time_statistics ();
3106 input_location = locus;
3108 #ifdef ENABLE_CHECKING
3109 validate_conversion_obstack ();
3110 #endif /* ENABLE_CHECKING */
3113 /* FN is an OFFSET_REF, DOTSTAR_EXPR or MEMBER_REF indicating the
3114 function to call in parse-tree form; it has not yet been
3115 semantically analyzed. ARGS are the arguments to the function.
3116 They have already been semantically analyzed. */
3119 build_offset_ref_call_from_tree (tree fn, tree args)
3128 object = TREE_OPERAND (fn, 0);
3130 if (processing_template_decl)
3132 gcc_assert (TREE_CODE (fn) == DOTSTAR_EXPR
3133 || TREE_CODE (fn) == MEMBER_REF);
3134 if (type_dependent_expression_p (fn)
3135 || any_type_dependent_arguments_p (args))
3136 return build_min_nt (CALL_EXPR, fn, args, NULL_TREE);
3138 /* Transform the arguments and add the implicit "this"
3139 parameter. That must be done before the FN is transformed
3140 because we depend on the form of FN. */
3141 args = build_non_dependent_args (args);
3142 if (TREE_CODE (fn) == DOTSTAR_EXPR)
3143 object = build_unary_op (ADDR_EXPR, object, 0);
3144 object = build_non_dependent_expr (object);
3145 args = tree_cons (NULL_TREE, object, args);
3146 /* Now that the arguments are done, transform FN. */
3147 fn = build_non_dependent_expr (fn);
3150 /* A qualified name corresponding to a bound pointer-to-member is
3151 represented as an OFFSET_REF:
3153 struct B { void g(); };
3155 void B::g() { (this->*p)(); } */
3156 if (TREE_CODE (fn) == OFFSET_REF)
3158 tree object_addr = build_unary_op (ADDR_EXPR, object, 0);
3159 fn = TREE_OPERAND (fn, 1);
3160 fn = get_member_function_from_ptrfunc (&object_addr, fn);
3161 args = tree_cons (NULL_TREE, object_addr, args);
3164 expr = build_function_call (fn, args);
3165 if (processing_template_decl && expr != error_mark_node)
3166 return build_min_non_dep (CALL_EXPR, expr, orig_fn, orig_args, NULL_TREE);
3172 check_default_args (tree x)
3174 tree arg = TYPE_ARG_TYPES (TREE_TYPE (x));
3175 bool saw_def = false;
3176 int i = 0 - (TREE_CODE (TREE_TYPE (x)) == METHOD_TYPE);
3177 for (; arg && arg != void_list_node; arg = TREE_CHAIN (arg), ++i)
3179 if (TREE_PURPOSE (arg))
3183 cp_error_at ("default argument missing for parameter %P of `%+#D'",
3191 mark_used (tree decl)
3193 TREE_USED (decl) = 1;
3194 if (processing_template_decl || skip_evaluation)
3197 if (TREE_CODE (decl) == FUNCTION_DECL && DECL_DECLARED_INLINE_P (decl)
3198 && !TREE_ASM_WRITTEN (decl))
3199 /* Remember it, so we can check it was defined. */
3201 if (DECL_DEFERRED_FN (decl))
3203 note_vague_linkage_fn (decl);
3206 assemble_external (decl);
3208 /* Is it a synthesized method that needs to be synthesized? */
3209 if (TREE_CODE (decl) == FUNCTION_DECL
3210 && DECL_NONSTATIC_MEMBER_FUNCTION_P (decl)
3211 && DECL_ARTIFICIAL (decl)
3212 && !DECL_THUNK_P (decl)
3213 && ! DECL_INITIAL (decl)
3214 /* Kludge: don't synthesize for default args. */
3215 && current_function_decl)
3217 synthesize_method (decl);
3218 /* If we've already synthesized the method we don't need to
3219 instantiate it, so we can return right away. */
3223 /* If this is a function or variable that is an instance of some
3224 template, we now know that we will need to actually do the
3225 instantiation. We check that DECL is not an explicit
3226 instantiation because that is not checked in instantiate_decl. */
3227 if ((DECL_NON_THUNK_FUNCTION_P (decl) || TREE_CODE (decl) == VAR_DECL)
3228 && DECL_LANG_SPECIFIC (decl) && DECL_TEMPLATE_INFO (decl)
3229 && (!DECL_EXPLICIT_INSTANTIATION (decl)
3230 || (TREE_CODE (decl) == FUNCTION_DECL
3231 && DECL_INLINE (DECL_TEMPLATE_RESULT
3232 (template_for_substitution (decl))))))
3233 /* We put off instantiating functions in order to improve compile
3234 times. Maintaining a stack of active functions is expensive,
3235 and the inliner knows to instantiate any functions it might
3237 instantiate_decl (decl, /*defer_ok=*/true, /*undefined_ok=*/0);
3240 #include "gt-cp-decl2.h"