1 /* Process declarations and variables for C compiler.
2 Copyright (C) 1988, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
3 2001 Free Software Foundation, Inc.
5 This file is part of GCC.
7 GCC is free software; you can redistribute it and/or modify it under
8 the terms of the GNU General Public License as published by the Free
9 Software Foundation; either version 2, or (at your option) any later
12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
17 You should have received a copy of the GNU General Public License
18 along with GCC; see the file COPYING. If not, write to the Free
19 Software Foundation, 59 Temple Place - Suite 330, Boston, MA
22 /* Process declarations and symbol lookup for C front end.
23 Also constructs types; the standard scalar types at initialization,
24 and structure, union, array and enum types when they are declared. */
26 /* ??? not all decl nodes are given the most useful possible
27 line numbers. For example, the CONST_DECLs for enum values. */
33 #include "tree-inline.h"
49 /* In grokdeclarator, distinguish syntactic contexts of declarators. */
51 { NORMAL, /* Ordinary declaration */
52 FUNCDEF, /* Function definition */
53 PARM, /* Declaration of parm before function body */
54 FIELD, /* Declaration inside struct or union */
55 BITFIELD, /* Likewise but with specified width */
56 TYPENAME}; /* Typename (inside cast or sizeof) */
59 /* Nonzero if we have seen an invalid cross reference
60 to a struct, union, or enum, but not yet printed the message. */
62 tree pending_invalid_xref;
63 /* File and line to appear in the eventual error message. */
64 const char *pending_invalid_xref_file;
65 int pending_invalid_xref_line;
67 /* While defining an enum type, this is 1 plus the last enumerator
68 constant value. Note that will do not have to save this or `enum_overflow'
69 around nested function definition since such a definition could only
70 occur in an enum value expression and we don't use these variables in
73 static tree enum_next_value;
75 /* Nonzero means that there was overflow computing enum_next_value. */
77 static int enum_overflow;
79 /* Parsing a function declarator leaves a list of parameter names
80 or a chain or parameter decls here. */
82 static tree last_function_parms;
84 /* Parsing a function declarator leaves here a chain of structure
85 and enum types declared in the parmlist. */
87 static tree last_function_parm_tags;
89 /* After parsing the declarator that starts a function definition,
90 `start_function' puts here the list of parameter names or chain of decls.
91 `store_parm_decls' finds it here. */
93 static tree current_function_parms;
95 /* Similar, for last_function_parm_tags. */
96 static tree current_function_parm_tags;
98 /* Similar, for the file and line that the prototype came from if this is
99 an old-style definition. */
100 static const char *current_function_prototype_file;
101 static int current_function_prototype_line;
103 /* The current statement tree. */
105 static struct stmt_tree_s c_stmt_tree;
107 /* The current scope statement stack. */
109 static tree c_scope_stmt_stack;
111 /* A list (chain of TREE_LIST nodes) of all LABEL_DECLs in the function
112 that have names. Here so we can clear out their names' definitions
113 at the end of the function. */
115 static tree named_labels;
117 /* A list of LABEL_DECLs from outer contexts that are currently shadowed. */
119 static tree shadowed_labels;
121 /* Nonzero when store_parm_decls is called indicates a varargs function.
122 Value not meaningful after store_parm_decls. */
124 static int c_function_varargs;
126 /* Set to 0 at beginning of a function definition, set to 1 if
127 a return statement that specifies a return value is seen. */
129 int current_function_returns_value;
131 /* Set to 0 at beginning of a function definition, set to 1 if
132 a return statement with no argument is seen. */
134 int current_function_returns_null;
136 /* Set to nonzero by `grokdeclarator' for a function
137 whose return type is defaulted, if warnings for this are desired. */
139 static int warn_about_return_type;
141 /* Nonzero when starting a function declared `extern inline'. */
143 static int current_extern_inline;
145 /* For each binding contour we allocate a binding_level structure
146 * which records the names defined in that contour.
149 * 1) one for each function definition,
150 * where internal declarations of the parameters appear.
151 * 2) one for each compound statement,
152 * to record its declarations.
154 * The current meaning of a name can be found by searching the levels from
155 * the current one out to the global one.
158 /* Note that the information in the `names' component of the global contour
159 is duplicated in the IDENTIFIER_GLOBAL_VALUEs of all identifiers. */
163 /* A chain of _DECL nodes for all variables, constants, functions,
164 and typedef types. These are in the reverse of the order supplied.
168 /* A list of structure, union and enum definitions,
169 * for looking up tag names.
170 * It is a chain of TREE_LIST nodes, each of whose TREE_PURPOSE is a name,
171 * or NULL_TREE; and whose TREE_VALUE is a RECORD_TYPE, UNION_TYPE,
172 * or ENUMERAL_TYPE node.
176 /* For each level, a list of shadowed outer-level local definitions
177 to be restored when this level is popped.
178 Each link is a TREE_LIST whose TREE_PURPOSE is an identifier and
179 whose TREE_VALUE is its old definition (a kind of ..._DECL node). */
182 /* For each level (except not the global one),
183 a chain of BLOCK nodes for all the levels
184 that were entered and exited one level down. */
187 /* The BLOCK node for this level, if one has been preallocated.
188 If 0, the BLOCK is allocated (if needed) when the level is popped. */
191 /* The binding level which this one is contained in (inherits from). */
192 struct binding_level *level_chain;
194 /* Nonzero for the level that holds the parameters of a function. */
197 /* Nonzero if this level "doesn't exist" for tags. */
198 char tag_transparent;
200 /* Nonzero if sublevels of this level "don't exist" for tags.
201 This is set in the parm level of a function definition
202 while reading the function body, so that the outermost block
203 of the function body will be tag-transparent. */
204 char subblocks_tag_transparent;
206 /* Nonzero means make a BLOCK for this level regardless of all else. */
209 /* Nonzero means make a BLOCK if this level has any subblocks. */
210 char keep_if_subblocks;
212 /* Number of decls in `names' that have incomplete
213 structure or union types. */
216 /* A list of decls giving the (reversed) specified order of parms,
217 not including any forward-decls in the parmlist.
218 This is so we can put the parms in proper order for assign_parms. */
222 #define NULL_BINDING_LEVEL (struct binding_level *) NULL
224 /* The binding level currently in effect. */
226 static struct binding_level *current_binding_level;
228 /* A chain of binding_level structures awaiting reuse. */
230 static struct binding_level *free_binding_level;
232 /* The outermost binding level, for names of file scope.
233 This is created when the compiler is started and exists
234 through the entire run. */
236 static struct binding_level *global_binding_level;
238 /* Binding level structures are initialized by copying this one. */
240 static struct binding_level clear_binding_level
241 = {NULL, NULL, NULL, NULL, NULL, NULL_BINDING_LEVEL, 0, 0, 0, 0, 0, 0,
244 /* Nonzero means unconditionally make a BLOCK for the next level pushed. */
246 static int keep_next_level_flag;
248 /* Nonzero means make a BLOCK for the next level pushed
249 if it has subblocks. */
251 static int keep_next_if_subblocks;
253 /* The chain of outer levels of label scopes.
254 This uses the same data structure used for binding levels,
255 but it works differently: each link in the chain records
256 saved values of named_labels and shadowed_labels for
257 a label binding level outside the current one. */
259 static struct binding_level *label_level_chain;
261 /* Functions called automatically at the beginning and end of execution. */
263 tree static_ctors, static_dtors;
265 /* Forward declarations. */
267 static struct binding_level * make_binding_level PARAMS ((void));
268 static void mark_binding_level PARAMS ((void *));
269 static void clear_limbo_values PARAMS ((tree));
270 static int duplicate_decls PARAMS ((tree, tree, int));
271 static int redeclaration_error_message PARAMS ((tree, tree));
272 static void storedecls PARAMS ((tree));
273 static void storetags PARAMS ((tree));
274 static tree lookup_tag PARAMS ((enum tree_code, tree,
275 struct binding_level *, int));
276 static tree lookup_tag_reverse PARAMS ((tree));
277 static tree grokdeclarator PARAMS ((tree, tree, enum decl_context,
279 static tree grokparms PARAMS ((tree, int));
280 static void layout_array_type PARAMS ((tree));
281 static tree c_make_fname_decl PARAMS ((tree, int));
282 static void c_expand_body PARAMS ((tree, int));
284 /* C-specific option variables. */
286 /* Nonzero means allow type mismatches in conditional expressions;
287 just make their values `void'. */
289 int flag_cond_mismatch;
291 /* Nonzero means don't recognize the keyword `asm'. */
295 /* Nonzero means do some things the same way PCC does. */
297 int flag_traditional;
299 /* Nonzero means enable C89 Amendment 1 features. */
303 /* Nonzero means use the ISO C99 dialect of C. */
307 /* Nonzero means that we have builtin functions, and main is an int */
311 /* Nonzero means add default format_arg attributes for functions not
314 int flag_noniso_default_format_attributes = 1;
316 /* Nonzero means to allow single precision math even if we're generally
317 being traditional. */
318 int flag_allow_single_precision = 0;
320 /* Nonzero means to treat bitfields as signed unless they say `unsigned'. */
322 int flag_signed_bitfields = 1;
323 int explicit_flag_signed_bitfields = 0;
325 /* Nonzero means warn about use of implicit int. */
327 int warn_implicit_int;
329 /* Nonzero means warn about usage of long long when `-pedantic'. */
331 int warn_long_long = 1;
333 /* Nonzero means message about use of implicit function declarations;
334 1 means warning; 2 means error. */
336 int mesg_implicit_function_declaration = -1;
338 /* Nonzero means give string constants the type `const char *'
339 to get extra warnings from them. These warnings will be too numerous
340 to be useful, except in thoroughly ANSIfied programs. */
342 int flag_const_strings;
344 /* Nonzero means warn about pointer casts that can drop a type qualifier
345 from the pointer target type. */
349 /* Nonzero means warn when casting a function call to a type that does
350 not match the return type (e.g. (float)sqrt() or (anything*)malloc()
351 when there is no previous declaration of sqrt or malloc. */
353 int warn_bad_function_cast;
355 /* Warn about functions which might be candidates for format attributes. */
357 int warn_missing_format_attribute;
359 /* Warn about traditional constructs whose meanings changed in ANSI C. */
361 int warn_traditional;
363 /* Nonzero means warn about sizeof(function) or addition/subtraction
364 of function pointers. */
366 int warn_pointer_arith;
368 /* Nonzero means warn for non-prototype function decls
369 or non-prototyped defs without previous prototype. */
371 int warn_strict_prototypes;
373 /* Nonzero means warn for any global function def
374 without separate previous prototype decl. */
376 int warn_missing_prototypes;
378 /* Nonzero means warn for any global function def
379 without separate previous decl. */
381 int warn_missing_declarations;
383 /* Nonzero means warn about multiple (redundant) decls for the same single
384 variable or function. */
386 int warn_redundant_decls = 0;
388 /* Nonzero means warn about extern declarations of objects not at
389 file-scope level and about *all* declarations of functions (whether
390 extern or static) not at file-scope level. Note that we exclude
391 implicit function declarations. To get warnings about those, use
394 int warn_nested_externs = 0;
396 /* Warn about a subscript that has type char. */
398 int warn_char_subscripts = 0;
400 /* Warn if a type conversion is done that might have confusing results. */
404 /* Warn if adding () is suggested. */
406 int warn_parentheses;
408 /* Warn if initializer is not completely bracketed. */
410 int warn_missing_braces;
412 /* Warn if main is suspicious. */
416 /* Warn about #pragma directives that are not recognised. */
418 int warn_unknown_pragmas = 0; /* Tri state variable. */
420 /* Warn about comparison of signed and unsigned values.
421 If -1, neither -Wsign-compare nor -Wno-sign-compare has been specified. */
423 int warn_sign_compare = -1;
425 /* Warn about testing equality of floating point numbers. */
427 int warn_float_equal = 0;
429 /* Nonzero means warn about use of multicharacter literals. */
431 int warn_multichar = 1;
433 /* The variant of the C language being processed. */
435 c_language_kind c_language = clk_c;
437 /* Nonzero means `$' can be in an identifier. */
439 #ifndef DOLLARS_IN_IDENTIFIERS
440 #define DOLLARS_IN_IDENTIFIERS 1
442 int dollars_in_ident = DOLLARS_IN_IDENTIFIERS;
444 /* Decode the string P as a language-specific option for C.
445 Return the number of strings consumed. Should not complain
446 if it does not recognise the option. */
449 c_decode_option (argc, argv)
450 int argc ATTRIBUTE_UNUSED;
453 int strings_processed;
456 strings_processed = cpp_handle_option (parse_in, argc, argv);
458 if (!strcmp (p, "-ftraditional") || !strcmp (p, "-traditional"))
460 flag_traditional = 1;
461 flag_writable_strings = 1;
463 else if (!strcmp (p, "-fallow-single-precision"))
464 flag_allow_single_precision = 1;
465 else if (!strcmp (p, "-fhosted") || !strcmp (p, "-fno-freestanding"))
470 else if (!strcmp (p, "-ffreestanding") || !strcmp (p, "-fno-hosted"))
474 /* warn_main will be 2 if set by -Wall, 1 if set by -Wmain */
478 else if (!strcmp (p, "-fnotraditional") || !strcmp (p, "-fno-traditional"))
480 flag_traditional = 0;
481 flag_writable_strings = 0;
483 else if (!strncmp (p, "-std=", 5))
485 /* Select the appropriate language standard. We currently
487 -std=iso9899:1990 same as -ansi
488 -std=iso9899:199409 ISO C as modified in amend. 1
489 -std=iso9899:1999 ISO C 99
490 -std=c89 same as -std=iso9899:1990
491 -std=c99 same as -std=iso9899:1999
492 -std=gnu89 default, iso9899:1990 + gnu extensions
493 -std=gnu99 iso9899:1999 + gnu extensions
495 const char *const argstart = &p[5];
497 if (!strcmp (argstart, "iso9899:1990")
498 || !strcmp (argstart, "c89"))
503 flag_traditional = 0;
504 flag_writable_strings = 0;
506 flag_no_nonansi_builtin = 1;
507 flag_noniso_default_format_attributes = 0;
510 else if (!strcmp (argstart, "iso9899:199409"))
515 else if (!strcmp (argstart, "iso9899:199x")
516 || !strcmp (argstart, "iso9899:1999")
517 || !strcmp (argstart, "c9x")
518 || !strcmp (argstart, "c99"))
520 flag_traditional = 0;
521 flag_writable_strings = 0;
523 flag_no_nonansi_builtin = 1;
524 flag_noniso_default_format_attributes = 0;
528 else if (!strcmp (argstart, "gnu89"))
530 flag_traditional = 0;
531 flag_writable_strings = 0;
533 flag_no_nonansi_builtin = 0;
534 flag_noniso_default_format_attributes = 1;
538 else if (!strcmp (argstart, "gnu9x") || !strcmp (argstart, "gnu99"))
540 flag_traditional = 0;
541 flag_writable_strings = 0;
543 flag_no_nonansi_builtin = 0;
544 flag_noniso_default_format_attributes = 1;
549 error ("unknown C standard `%s'", argstart);
551 else if (!strcmp (p, "-fdollars-in-identifiers"))
552 dollars_in_ident = 1;
553 else if (!strcmp (p, "-fno-dollars-in-identifiers"))
554 dollars_in_ident = 0;
555 else if (!strcmp (p, "-fsigned-char"))
556 flag_signed_char = 1;
557 else if (!strcmp (p, "-funsigned-char"))
558 flag_signed_char = 0;
559 else if (!strcmp (p, "-fno-signed-char"))
560 flag_signed_char = 0;
561 else if (!strcmp (p, "-fno-unsigned-char"))
562 flag_signed_char = 1;
563 else if (!strcmp (p, "-fsigned-bitfields")
564 || !strcmp (p, "-fno-unsigned-bitfields"))
566 flag_signed_bitfields = 1;
567 explicit_flag_signed_bitfields = 1;
569 else if (!strcmp (p, "-funsigned-bitfields")
570 || !strcmp (p, "-fno-signed-bitfields"))
572 flag_signed_bitfields = 0;
573 explicit_flag_signed_bitfields = 1;
575 else if (!strcmp (p, "-fshort-enums"))
576 flag_short_enums = 1;
577 else if (!strcmp (p, "-fno-short-enums"))
578 flag_short_enums = 0;
579 else if (!strcmp (p, "-fshort-wchar"))
580 flag_short_wchar = 1;
581 else if (!strcmp (p, "-fno-short-wchar"))
582 flag_short_wchar = 0;
583 else if (!strcmp (p, "-fcond-mismatch"))
584 flag_cond_mismatch = 1;
585 else if (!strcmp (p, "-fno-cond-mismatch"))
586 flag_cond_mismatch = 0;
587 else if (!strcmp (p, "-fshort-double"))
588 flag_short_double = 1;
589 else if (!strcmp (p, "-fno-short-double"))
590 flag_short_double = 0;
591 else if (!strcmp (p, "-fasm"))
593 else if (!strcmp (p, "-fno-asm"))
595 else if (!strcmp (p, "-fbuiltin"))
597 else if (!strcmp (p, "-fno-builtin"))
599 else if (p[0] == '-' && p[1] == 'f' && dump_switch_p (p + 2))
601 else if (!strcmp (p, "-ansi"))
603 else if (!strcmp (p, "-Werror-implicit-function-declaration"))
604 mesg_implicit_function_declaration = 2;
605 else if (!strcmp (p, "-Wimplicit-function-declaration"))
606 mesg_implicit_function_declaration = 1;
607 else if (!strcmp (p, "-Wno-implicit-function-declaration"))
608 mesg_implicit_function_declaration = 0;
609 else if (!strcmp (p, "-Wimplicit-int"))
610 warn_implicit_int = 1;
611 else if (!strcmp (p, "-Wno-implicit-int"))
612 warn_implicit_int = 0;
613 else if (!strcmp (p, "-Wimplicit"))
615 warn_implicit_int = 1;
616 if (mesg_implicit_function_declaration != 2)
617 mesg_implicit_function_declaration = 1;
619 else if (!strcmp (p, "-Wno-implicit"))
620 warn_implicit_int = 0, mesg_implicit_function_declaration = 0;
621 else if (!strcmp (p, "-Wlong-long"))
623 else if (!strcmp (p, "-Wno-long-long"))
625 else if (!strcmp (p, "-Wwrite-strings"))
626 flag_const_strings = 1;
627 else if (!strcmp (p, "-Wno-write-strings"))
628 flag_const_strings = 0;
629 else if (!strcmp (p, "-Wcast-qual"))
631 else if (!strcmp (p, "-Wno-cast-qual"))
633 else if (!strcmp (p, "-Wbad-function-cast"))
634 warn_bad_function_cast = 1;
635 else if (!strcmp (p, "-Wno-bad-function-cast"))
636 warn_bad_function_cast = 0;
637 else if (!strcmp (p, "-Wno-missing-noreturn"))
638 warn_missing_noreturn = 0;
639 else if (!strcmp (p, "-Wmissing-format-attribute"))
640 warn_missing_format_attribute = 1;
641 else if (!strcmp (p, "-Wno-missing-format-attribute"))
642 warn_missing_format_attribute = 0;
643 else if (!strcmp (p, "-Wpointer-arith"))
644 warn_pointer_arith = 1;
645 else if (!strcmp (p, "-Wno-pointer-arith"))
646 warn_pointer_arith = 0;
647 else if (!strcmp (p, "-Wstrict-prototypes"))
648 warn_strict_prototypes = 1;
649 else if (!strcmp (p, "-Wno-strict-prototypes"))
650 warn_strict_prototypes = 0;
651 else if (!strcmp (p, "-Wmissing-prototypes"))
652 warn_missing_prototypes = 1;
653 else if (!strcmp (p, "-Wno-missing-prototypes"))
654 warn_missing_prototypes = 0;
655 else if (!strcmp (p, "-Wmissing-declarations"))
656 warn_missing_declarations = 1;
657 else if (!strcmp (p, "-Wno-missing-declarations"))
658 warn_missing_declarations = 0;
659 else if (!strcmp (p, "-Wredundant-decls"))
660 warn_redundant_decls = 1;
661 else if (!strcmp (p, "-Wno-redundant-decls"))
662 warn_redundant_decls = 0;
663 else if (!strcmp (p, "-Wnested-externs"))
664 warn_nested_externs = 1;
665 else if (!strcmp (p, "-Wno-nested-externs"))
666 warn_nested_externs = 0;
667 else if (!strcmp (p, "-Wtraditional"))
668 warn_traditional = 1;
669 else if (!strcmp (p, "-Wno-traditional"))
670 warn_traditional = 0;
671 else if (!strncmp (p, "-Wformat=", 9))
672 set_Wformat (atoi (p + 9));
673 else if (!strcmp (p, "-Wformat"))
675 else if (!strcmp (p, "-Wno-format"))
677 else if (!strcmp (p, "-Wformat-y2k"))
679 else if (!strcmp (p, "-Wno-format-y2k"))
681 else if (!strcmp (p, "-Wformat-extra-args"))
682 warn_format_extra_args = 1;
683 else if (!strcmp (p, "-Wno-format-extra-args"))
684 warn_format_extra_args = 0;
685 else if (!strcmp (p, "-Wformat-nonliteral"))
686 warn_format_nonliteral = 1;
687 else if (!strcmp (p, "-Wno-format-nonliteral"))
688 warn_format_nonliteral = 0;
689 else if (!strcmp (p, "-Wformat-security"))
690 warn_format_security = 1;
691 else if (!strcmp (p, "-Wno-format-security"))
692 warn_format_security = 0;
693 else if (!strcmp (p, "-Wchar-subscripts"))
694 warn_char_subscripts = 1;
695 else if (!strcmp (p, "-Wno-char-subscripts"))
696 warn_char_subscripts = 0;
697 else if (!strcmp (p, "-Wconversion"))
699 else if (!strcmp (p, "-Wno-conversion"))
701 else if (!strcmp (p, "-Wparentheses"))
702 warn_parentheses = 1;
703 else if (!strcmp (p, "-Wno-parentheses"))
704 warn_parentheses = 0;
705 else if (!strcmp (p, "-Wreturn-type"))
706 warn_return_type = 1;
707 else if (!strcmp (p, "-Wno-return-type"))
708 warn_return_type = 0;
709 else if (!strcmp (p, "-Wsequence-point"))
710 warn_sequence_point = 1;
711 else if (!strcmp (p, "-Wno-sequence-point"))
712 warn_sequence_point = 0;
713 else if (!strcmp (p, "-Wcomment"))
714 ; /* cpp handles this one. */
715 else if (!strcmp (p, "-Wno-comment"))
716 ; /* cpp handles this one. */
717 else if (!strcmp (p, "-Wcomments"))
718 ; /* cpp handles this one. */
719 else if (!strcmp (p, "-Wno-comments"))
720 ; /* cpp handles this one. */
721 else if (!strcmp (p, "-Wtrigraphs"))
722 ; /* cpp handles this one. */
723 else if (!strcmp (p, "-Wno-trigraphs"))
724 ; /* cpp handles this one. */
725 else if (!strcmp (p, "-Wundef"))
726 ; /* cpp handles this one. */
727 else if (!strcmp (p, "-Wno-undef"))
728 ; /* cpp handles this one. */
729 else if (!strcmp (p, "-Wimport"))
730 ; /* cpp handles this one. */
731 else if (!strcmp (p, "-Wno-import"))
732 ; /* cpp handles this one. */
733 else if (!strcmp (p, "-Wmissing-braces"))
734 warn_missing_braces = 1;
735 else if (!strcmp (p, "-Wno-missing-braces"))
736 warn_missing_braces = 0;
737 else if (!strcmp (p, "-Wmain"))
739 else if (!strcmp (p, "-Wno-main"))
741 else if (!strcmp (p, "-Wsign-compare"))
742 warn_sign_compare = 1;
743 else if (!strcmp (p, "-Wno-sign-compare"))
744 warn_sign_compare = 0;
745 else if (!strcmp (p, "-Wfloat-equal"))
746 warn_float_equal = 1;
747 else if (!strcmp (p, "-Wno-float-equal"))
748 warn_float_equal = 0;
749 else if (!strcmp (p, "-Wmultichar"))
751 else if (!strcmp (p, "-Wno-multichar"))
753 else if (!strcmp (p, "-Wdiv-by-zero"))
754 warn_div_by_zero = 1;
755 else if (!strcmp (p, "-Wno-div-by-zero"))
756 warn_div_by_zero = 0;
757 else if (!strcmp (p, "-Wunknown-pragmas"))
758 /* Set to greater than 1, so that even unknown pragmas in system
759 headers will be warned about. */
760 warn_unknown_pragmas = 2;
761 else if (!strcmp (p, "-Wno-unknown-pragmas"))
762 warn_unknown_pragmas = 0;
763 else if (!strcmp (p, "-Wall"))
765 /* We save the value of warn_uninitialized, since if they put
766 -Wuninitialized on the command line, we need to generate a
767 warning about not using it without also specifying -O. */
768 if (warn_uninitialized != 1)
769 warn_uninitialized = 2;
770 warn_implicit_int = 1;
771 mesg_implicit_function_declaration = 1;
772 warn_return_type = 1;
776 warn_char_subscripts = 1;
777 warn_parentheses = 1;
778 warn_sequence_point = 1;
779 warn_missing_braces = 1;
780 /* We set this to 2 here, but 1 in -Wmain, so -ffreestanding can turn
781 it off only if it's not explicit. */
783 /* Only warn about unknown pragmas that are not in system headers. */
784 warn_unknown_pragmas = 1;
787 return strings_processed;
792 /* Hooks for print_node. */
795 print_lang_decl (file, node, indent)
796 FILE *file ATTRIBUTE_UNUSED;
797 tree node ATTRIBUTE_UNUSED;
798 int indent ATTRIBUTE_UNUSED;
803 print_lang_type (file, node, indent)
804 FILE *file ATTRIBUTE_UNUSED;
805 tree node ATTRIBUTE_UNUSED;
806 int indent ATTRIBUTE_UNUSED;
811 print_lang_identifier (file, node, indent)
816 print_node (file, "global", IDENTIFIER_GLOBAL_VALUE (node), indent + 4);
817 print_node (file, "local", IDENTIFIER_LOCAL_VALUE (node), indent + 4);
818 print_node (file, "label", IDENTIFIER_LABEL_VALUE (node), indent + 4);
819 print_node (file, "implicit", IDENTIFIER_IMPLICIT_DECL (node), indent + 4);
820 print_node (file, "error locus", IDENTIFIER_ERROR_LOCUS (node), indent + 4);
821 print_node (file, "limbo value", IDENTIFIER_LIMBO_VALUE (node), indent + 4);
822 if (C_IS_RESERVED_WORD (node))
824 tree rid = ridpointers[C_RID_CODE (node)];
825 indent_to (file, indent + 4);
826 fprintf (file, "rid ");
827 fprintf (file, HOST_PTR_PRINTF, (void *)rid);
828 fprintf (file, " \"%s\"", IDENTIFIER_POINTER (rid));
832 /* Hook called at end of compilation to assume 1 elt
833 for a top-level tentative array defn that wasn't complete before. */
836 finish_incomplete_decl (decl)
839 if (TREE_CODE (decl) == VAR_DECL)
841 tree type = TREE_TYPE (decl);
842 if (type != error_mark_node
843 && TREE_CODE (type) == ARRAY_TYPE
844 && ! DECL_EXTERNAL (decl)
845 && TYPE_DOMAIN (type) == 0)
847 warning_with_decl (decl, "array `%s' assumed to have one element");
849 complete_array_type (type, NULL_TREE, 1);
851 layout_decl (decl, 0);
856 /* Create a new `struct binding_level'. */
858 static struct binding_level *
859 make_binding_level ()
862 return (struct binding_level *) xmalloc (sizeof (struct binding_level));
865 /* Nonzero if we are currently in the global binding level. */
870 return current_binding_level == global_binding_level;
876 keep_next_level_flag = 1;
879 /* Nonzero if the current level needs to have a BLOCK made. */
884 return ((current_binding_level->keep_if_subblocks
885 && current_binding_level->blocks != 0)
886 || current_binding_level->keep
887 || current_binding_level->names != 0
888 || (current_binding_level->tags != 0
889 && !current_binding_level->tag_transparent));
892 /* Identify this binding level as a level of parameters.
893 DEFINITION_FLAG is 1 for a definition, 0 for a declaration.
894 But it turns out there is no way to pass the right value for
895 DEFINITION_FLAG, so we ignore it. */
898 declare_parm_level (definition_flag)
899 int definition_flag ATTRIBUTE_UNUSED;
901 current_binding_level->parm_flag = 1;
904 /* Nonzero if currently making parm declarations. */
909 return current_binding_level->parm_flag;
912 /* Enter a new binding level.
913 If TAG_TRANSPARENT is nonzero, do so only for the name space of variables,
914 not for that of tags. */
917 pushlevel (tag_transparent)
920 struct binding_level *newlevel = NULL_BINDING_LEVEL;
922 /* If this is the top level of a function,
923 just make sure that NAMED_LABELS is 0. */
925 if (current_binding_level == global_binding_level)
930 /* Reuse or create a struct for this binding level. */
932 if (free_binding_level)
934 newlevel = free_binding_level;
935 free_binding_level = free_binding_level->level_chain;
939 newlevel = make_binding_level ();
942 /* Add this level to the front of the chain (stack) of levels that
945 *newlevel = clear_binding_level;
946 newlevel->tag_transparent
948 || (current_binding_level
949 ? current_binding_level->subblocks_tag_transparent
951 newlevel->level_chain = current_binding_level;
952 current_binding_level = newlevel;
953 newlevel->keep = keep_next_level_flag;
954 keep_next_level_flag = 0;
955 newlevel->keep_if_subblocks = keep_next_if_subblocks;
956 keep_next_if_subblocks = 0;
959 /* Clear the limbo values of all identifiers defined in BLOCK or a subblock. */
962 clear_limbo_values (block)
967 for (tem = BLOCK_VARS (block); tem; tem = TREE_CHAIN (tem))
968 if (DECL_NAME (tem) != 0)
969 IDENTIFIER_LIMBO_VALUE (DECL_NAME (tem)) = 0;
971 for (tem = BLOCK_SUBBLOCKS (block); tem; tem = TREE_CHAIN (tem))
972 clear_limbo_values (tem);
975 /* Exit a binding level.
976 Pop the level off, and restore the state of the identifier-decl mappings
977 that were in effect when this level was entered.
979 If KEEP is nonzero, this level had explicit declarations, so
980 and create a "block" (a BLOCK node) for the level
981 to record its declarations and subblocks for symbol table output.
983 If FUNCTIONBODY is nonzero, this level is the body of a function,
984 so create a block as if KEEP were set and also clear out all
987 If REVERSE is nonzero, reverse the order of decls before putting
988 them into the BLOCK. */
991 poplevel (keep, reverse, functionbody)
997 /* The chain of decls was accumulated in reverse order.
998 Put it into forward order, just for cleanliness. */
1000 tree tags = current_binding_level->tags;
1001 tree subblocks = current_binding_level->blocks;
1004 int block_previously_created;
1006 keep |= current_binding_level->keep;
1008 /* This warning is turned off because it causes warnings for
1009 declarations like `extern struct foo *x'. */
1011 /* Warn about incomplete structure types in this level. */
1012 for (link = tags; link; link = TREE_CHAIN (link))
1013 if (!COMPLETE_TYPE_P (TREE_VALUE (link)))
1015 tree type = TREE_VALUE (link);
1016 tree type_name = TYPE_NAME (type);
1017 char *id = IDENTIFIER_POINTER (TREE_CODE (type_name) == IDENTIFIER_NODE
1019 : DECL_NAME (type_name));
1020 switch (TREE_CODE (type))
1023 error ("`struct %s' incomplete in scope ending here", id);
1026 error ("`union %s' incomplete in scope ending here", id);
1029 error ("`enum %s' incomplete in scope ending here", id);
1035 /* Get the decls in the order they were written.
1036 Usually current_binding_level->names is in reverse order.
1037 But parameter decls were previously put in forward order. */
1040 current_binding_level->names
1041 = decls = nreverse (current_binding_level->names);
1043 decls = current_binding_level->names;
1045 /* Output any nested inline functions within this block
1046 if they weren't already output. */
1048 for (decl = decls; decl; decl = TREE_CHAIN (decl))
1049 if (TREE_CODE (decl) == FUNCTION_DECL
1050 && ! TREE_ASM_WRITTEN (decl)
1051 && DECL_INITIAL (decl) != 0
1052 && TREE_ADDRESSABLE (decl))
1054 /* If this decl was copied from a file-scope decl
1055 on account of a block-scope extern decl,
1056 propagate TREE_ADDRESSABLE to the file-scope decl.
1058 DECL_ABSTRACT_ORIGIN can be set to itself if warn_return_type is
1059 true, since then the decl goes through save_for_inline_copying. */
1060 if (DECL_ABSTRACT_ORIGIN (decl) != 0
1061 && DECL_ABSTRACT_ORIGIN (decl) != decl)
1062 TREE_ADDRESSABLE (DECL_ABSTRACT_ORIGIN (decl)) = 1;
1065 /* We used to warn about unused variables in expand_end_bindings,
1066 i.e. while generating RTL. But in function-at-a-time mode we may
1067 choose to never expand a function at all (e.g. auto inlining), so
1068 we do this explicitly now. */
1069 warn_about_unused_variables (getdecls ());
1071 /* If there were any declarations or structure tags in that level,
1072 or if this level is a function body,
1073 create a BLOCK to record them for the life of this function. */
1076 block_previously_created = (current_binding_level->this_block != 0);
1077 if (block_previously_created)
1078 block = current_binding_level->this_block;
1079 else if (keep || functionbody
1080 || (current_binding_level->keep_if_subblocks && subblocks != 0))
1081 block = make_node (BLOCK);
1084 BLOCK_VARS (block) = decls;
1085 BLOCK_SUBBLOCKS (block) = subblocks;
1088 /* In each subblock, record that this is its superior. */
1090 for (link = subblocks; link; link = TREE_CHAIN (link))
1091 BLOCK_SUPERCONTEXT (link) = block;
1093 /* Clear out the meanings of the local variables of this level. */
1095 for (link = decls; link; link = TREE_CHAIN (link))
1097 if (DECL_NAME (link) != 0)
1099 /* If the ident. was used or addressed via a local extern decl,
1100 don't forget that fact. */
1101 if (DECL_EXTERNAL (link))
1103 if (TREE_USED (link))
1104 TREE_USED (DECL_NAME (link)) = 1;
1105 if (TREE_ADDRESSABLE (link))
1106 TREE_ADDRESSABLE (DECL_ASSEMBLER_NAME (link)) = 1;
1108 IDENTIFIER_LOCAL_VALUE (DECL_NAME (link)) = 0;
1112 /* Restore all name-meanings of the outer levels
1113 that were shadowed by this level. */
1115 for (link = current_binding_level->shadowed; link; link = TREE_CHAIN (link))
1116 IDENTIFIER_LOCAL_VALUE (TREE_PURPOSE (link)) = TREE_VALUE (link);
1118 /* If the level being exited is the top level of a function,
1119 check over all the labels, and clear out the current
1120 (function local) meanings of their names. */
1124 clear_limbo_values (block);
1126 /* If this is the top level block of a function,
1127 the vars are the function's parameters.
1128 Don't leave them in the BLOCK because they are
1129 found in the FUNCTION_DECL instead. */
1131 BLOCK_VARS (block) = 0;
1133 /* Clear out the definitions of all label names,
1134 since their scopes end here,
1135 and add them to BLOCK_VARS. */
1137 for (link = named_labels; link; link = TREE_CHAIN (link))
1139 tree label = TREE_VALUE (link);
1141 if (DECL_INITIAL (label) == 0)
1143 error_with_decl (label, "label `%s' used but not defined");
1144 /* Avoid crashing later. */
1145 define_label (input_filename, lineno,
1148 else if (warn_unused_label && !TREE_USED (label))
1149 warning_with_decl (label, "label `%s' defined but not used");
1150 IDENTIFIER_LABEL_VALUE (DECL_NAME (label)) = 0;
1152 /* Put the labels into the "variables" of the
1153 top-level block, so debugger can see them. */
1154 TREE_CHAIN (label) = BLOCK_VARS (block);
1155 BLOCK_VARS (block) = label;
1159 /* Pop the current level, and free the structure for reuse. */
1162 struct binding_level *level = current_binding_level;
1163 current_binding_level = current_binding_level->level_chain;
1165 level->level_chain = free_binding_level;
1166 free_binding_level = level;
1169 /* Dispose of the block that we just made inside some higher level. */
1171 DECL_INITIAL (current_function_decl) = block;
1174 if (!block_previously_created)
1175 current_binding_level->blocks
1176 = chainon (current_binding_level->blocks, block);
1178 /* If we did not make a block for the level just exited,
1179 any blocks made for inner levels
1180 (since they cannot be recorded as subblocks in that level)
1181 must be carried forward so they will later become subblocks
1182 of something else. */
1184 current_binding_level->blocks
1185 = chainon (current_binding_level->blocks, subblocks);
1187 /* Set the TYPE_CONTEXTs for all of the tagged types belonging to this
1188 binding contour so that they point to the appropriate construct, i.e.
1189 either to the current FUNCTION_DECL node, or else to the BLOCK node
1190 we just constructed.
1192 Note that for tagged types whose scope is just the formal parameter
1193 list for some function type specification, we can't properly set
1194 their TYPE_CONTEXTs here, because we don't have a pointer to the
1195 appropriate FUNCTION_TYPE node readily available to us. For those
1196 cases, the TYPE_CONTEXTs of the relevant tagged type nodes get set
1197 in `grokdeclarator' as soon as we have created the FUNCTION_TYPE
1198 node which will represent the "scope" for these "parameter list local"
1202 for (link = tags; link; link = TREE_CHAIN (link))
1203 TYPE_CONTEXT (TREE_VALUE (link)) = current_function_decl;
1205 for (link = tags; link; link = TREE_CHAIN (link))
1206 TYPE_CONTEXT (TREE_VALUE (link)) = block;
1209 TREE_USED (block) = 1;
1214 /* Delete the node BLOCK from the current binding level.
1215 This is used for the block inside a stmt expr ({...})
1216 so that the block can be reinserted where appropriate. */
1219 delete_block (block)
1223 if (current_binding_level->blocks == block)
1224 current_binding_level->blocks = TREE_CHAIN (block);
1225 for (t = current_binding_level->blocks; t;)
1227 if (TREE_CHAIN (t) == block)
1228 TREE_CHAIN (t) = TREE_CHAIN (block);
1232 TREE_CHAIN (block) = NULL;
1233 /* Clear TREE_USED which is always set by poplevel.
1234 The flag is set again if insert_block is called. */
1235 TREE_USED (block) = 0;
1238 /* Insert BLOCK at the end of the list of subblocks of the
1239 current binding level. This is used when a BIND_EXPR is expanded,
1240 to handle the BLOCK node inside the BIND_EXPR. */
1243 insert_block (block)
1246 TREE_USED (block) = 1;
1247 current_binding_level->blocks
1248 = chainon (current_binding_level->blocks, block);
1251 /* Set the BLOCK node for the innermost scope
1252 (the one we are currently in). */
1258 current_binding_level->this_block = block;
1259 current_binding_level->names = chainon (current_binding_level->names,
1260 BLOCK_VARS (block));
1261 current_binding_level->blocks = chainon (current_binding_level->blocks,
1262 BLOCK_SUBBLOCKS (block));
1268 struct binding_level *newlevel;
1270 /* Reuse or create a struct for this binding level. */
1272 if (free_binding_level)
1274 newlevel = free_binding_level;
1275 free_binding_level = free_binding_level->level_chain;
1279 newlevel = make_binding_level ();
1282 /* Add this level to the front of the chain (stack) of label levels. */
1284 newlevel->level_chain = label_level_chain;
1285 label_level_chain = newlevel;
1287 newlevel->names = named_labels;
1288 newlevel->shadowed = shadowed_labels;
1290 shadowed_labels = 0;
1296 struct binding_level *level = label_level_chain;
1299 /* Clear out the definitions of the declared labels in this level.
1300 Leave in the list any ordinary, non-declared labels. */
1301 for (link = named_labels, prev = 0; link;)
1303 if (C_DECLARED_LABEL_FLAG (TREE_VALUE (link)))
1305 if (DECL_SOURCE_LINE (TREE_VALUE (link)) == 0)
1307 error_with_decl (TREE_VALUE (link),
1308 "label `%s' used but not defined");
1309 /* Avoid crashing later. */
1310 define_label (input_filename, lineno,
1311 DECL_NAME (TREE_VALUE (link)));
1313 else if (warn_unused_label && !TREE_USED (TREE_VALUE (link)))
1314 warning_with_decl (TREE_VALUE (link),
1315 "label `%s' defined but not used");
1316 IDENTIFIER_LABEL_VALUE (DECL_NAME (TREE_VALUE (link))) = 0;
1318 /* Delete this element from the list. */
1319 link = TREE_CHAIN (link);
1321 TREE_CHAIN (prev) = link;
1323 named_labels = link;
1328 link = TREE_CHAIN (link);
1332 /* Bring back all the labels that were shadowed. */
1333 for (link = shadowed_labels; link; link = TREE_CHAIN (link))
1334 if (DECL_NAME (TREE_VALUE (link)) != 0)
1335 IDENTIFIER_LABEL_VALUE (DECL_NAME (TREE_VALUE (link)))
1336 = TREE_VALUE (link);
1338 named_labels = chainon (named_labels, level->names);
1339 shadowed_labels = level->shadowed;
1341 /* Pop the current level, and free the structure for reuse. */
1342 label_level_chain = label_level_chain->level_chain;
1343 level->level_chain = free_binding_level;
1344 free_binding_level = level;
1347 /* Push a definition or a declaration of struct, union or enum tag "name".
1348 "type" should be the type node.
1349 We assume that the tag "name" is not already defined.
1351 Note that the definition may really be just a forward reference.
1352 In that case, the TYPE_SIZE will be zero. */
1355 pushtag (name, type)
1358 struct binding_level *b;
1360 /* Find the proper binding level for this type tag. */
1362 for (b = current_binding_level; b->tag_transparent; b = b->level_chain)
1367 /* Record the identifier as the type's name if it has none. */
1369 if (TYPE_NAME (type) == 0)
1370 TYPE_NAME (type) = name;
1373 b->tags = tree_cons (name, type, b->tags);
1375 /* Create a fake NULL-named TYPE_DECL node whose TREE_TYPE will be the
1376 tagged type we just added to the current binding level. This fake
1377 NULL-named TYPE_DECL node helps dwarfout.c to know when it needs
1378 to output a representation of a tagged type, and it also gives
1379 us a convenient place to record the "scope start" address for the
1382 TYPE_STUB_DECL (type) = pushdecl (build_decl (TYPE_DECL, NULL_TREE, type));
1384 /* An approximation for now, so we can tell this is a function-scope tag.
1385 This will be updated in poplevel. */
1386 TYPE_CONTEXT (type) = DECL_CONTEXT (TYPE_STUB_DECL (type));
1389 /* Handle when a new declaration NEWDECL
1390 has the same name as an old one OLDDECL
1391 in the same binding contour.
1392 Prints an error message if appropriate.
1394 If safely possible, alter OLDDECL to look like NEWDECL, and return 1.
1395 Otherwise, return 0.
1397 When DIFFERENT_BINDING_LEVEL is true, NEWDECL is an external declaration,
1398 and OLDDECL is in an outer binding level and should thus not be changed. */
1401 duplicate_decls (newdecl, olddecl, different_binding_level)
1402 tree newdecl, olddecl;
1403 int different_binding_level;
1405 int types_match = comptypes (TREE_TYPE (newdecl), TREE_TYPE (olddecl));
1406 int new_is_definition = (TREE_CODE (newdecl) == FUNCTION_DECL
1407 && DECL_INITIAL (newdecl) != 0);
1408 tree oldtype = TREE_TYPE (olddecl);
1409 tree newtype = TREE_TYPE (newdecl);
1412 if (DECL_P (olddecl))
1414 if (TREE_CODE (newdecl) == FUNCTION_DECL
1415 && TREE_CODE (olddecl) == FUNCTION_DECL
1416 && (DECL_UNINLINABLE (newdecl) || DECL_UNINLINABLE (olddecl)))
1418 if (DECL_DECLARED_INLINE_P (newdecl)
1419 && DECL_UNINLINABLE (newdecl)
1420 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl)))
1421 /* Already warned elsewhere. */;
1422 else if (DECL_DECLARED_INLINE_P (olddecl)
1423 && DECL_UNINLINABLE (olddecl)
1424 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl)))
1425 /* Already warned. */;
1426 else if (DECL_DECLARED_INLINE_P (newdecl)
1427 && ! DECL_DECLARED_INLINE_P (olddecl)
1428 && DECL_UNINLINABLE (olddecl)
1429 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl)))
1431 warning_with_decl (newdecl,
1432 "function `%s' redeclared as inline");
1433 warning_with_decl (olddecl,
1434 "previous declaration of function `%s' with attribute noinline");
1436 else if (DECL_DECLARED_INLINE_P (olddecl)
1437 && DECL_UNINLINABLE (newdecl)
1438 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl)))
1440 warning_with_decl (newdecl,
1441 "function `%s' redeclared with attribute noinline");
1442 warning_with_decl (olddecl,
1443 "previous declaration of function `%s' was inline");
1447 DECL_ATTRIBUTES (newdecl)
1448 = (*targetm.merge_decl_attributes) (olddecl, newdecl);
1451 if (TREE_CODE (newtype) == ERROR_MARK
1452 || TREE_CODE (oldtype) == ERROR_MARK)
1455 /* New decl is completely inconsistent with the old one =>
1456 tell caller to replace the old one.
1457 This is always an error except in the case of shadowing a builtin. */
1458 if (TREE_CODE (olddecl) != TREE_CODE (newdecl))
1460 if (TREE_CODE (olddecl) == FUNCTION_DECL
1461 && (DECL_BUILT_IN (olddecl)
1462 || DECL_BUILT_IN_NONANSI (olddecl)))
1464 /* If you declare a built-in or predefined function name as static,
1465 the old definition is overridden,
1466 but optionally warn this was a bad choice of name. */
1467 if (!TREE_PUBLIC (newdecl))
1471 else if (DECL_BUILT_IN (olddecl))
1472 warning_with_decl (newdecl, "shadowing built-in function `%s'");
1474 warning_with_decl (newdecl, "shadowing library function `%s'");
1476 /* Likewise, if the built-in is not ansi, then programs can
1477 override it even globally without an error. */
1478 else if (! DECL_BUILT_IN (olddecl))
1479 warning_with_decl (newdecl,
1480 "library function `%s' declared as non-function");
1482 else if (DECL_BUILT_IN_NONANSI (olddecl))
1483 warning_with_decl (newdecl,
1484 "built-in function `%s' declared as non-function");
1486 warning_with_decl (newdecl,
1487 "built-in function `%s' declared as non-function");
1491 error_with_decl (newdecl, "`%s' redeclared as different kind of symbol");
1492 error_with_decl (olddecl, "previous declaration of `%s'");
1498 /* For real parm decl following a forward decl,
1499 return 1 so old decl will be reused. */
1500 if (types_match && TREE_CODE (newdecl) == PARM_DECL
1501 && TREE_ASM_WRITTEN (olddecl) && ! TREE_ASM_WRITTEN (newdecl))
1504 /* The new declaration is the same kind of object as the old one.
1505 The declarations may partially match. Print warnings if they don't
1506 match enough. Ultimately, copy most of the information from the new
1507 decl to the old one, and keep using the old one. */
1509 if (flag_traditional && TREE_CODE (newdecl) == FUNCTION_DECL
1510 && IDENTIFIER_IMPLICIT_DECL (DECL_NAME (newdecl)) == olddecl
1511 && DECL_INITIAL (olddecl) == 0)
1512 /* If -traditional, avoid error for redeclaring fcn
1513 after implicit decl. */
1515 else if (TREE_CODE (olddecl) == FUNCTION_DECL
1516 && DECL_BUILT_IN (olddecl))
1518 /* A function declaration for a built-in function. */
1519 if (!TREE_PUBLIC (newdecl))
1521 /* If you declare a built-in function name as static, the
1522 built-in definition is overridden,
1523 but optionally warn this was a bad choice of name. */
1525 warning_with_decl (newdecl, "shadowing built-in function `%s'");
1526 /* Discard the old built-in function. */
1529 else if (!types_match)
1531 /* Accept the return type of the new declaration if same modes. */
1532 tree oldreturntype = TREE_TYPE (oldtype);
1533 tree newreturntype = TREE_TYPE (newtype);
1535 if (TYPE_MODE (oldreturntype) == TYPE_MODE (newreturntype))
1537 /* Function types may be shared, so we can't just modify
1538 the return type of olddecl's function type. */
1540 = build_function_type (newreturntype,
1541 TYPE_ARG_TYPES (oldtype));
1542 trytype = build_type_attribute_variant (trytype,
1543 TYPE_ATTRIBUTES (oldtype));
1545 types_match = comptypes (newtype, trytype);
1549 /* Accept harmless mismatch in first argument type also.
1550 This is for the ffs and fprintf builtins. */
1551 if (TYPE_ARG_TYPES (TREE_TYPE (newdecl)) != 0
1552 && TYPE_ARG_TYPES (oldtype) != 0
1553 && TREE_VALUE (TYPE_ARG_TYPES (newtype)) != 0
1554 && TREE_VALUE (TYPE_ARG_TYPES (oldtype)) != 0
1555 && (TYPE_MODE (TREE_VALUE (TYPE_ARG_TYPES (newtype)))
1556 == TYPE_MODE (TREE_VALUE (TYPE_ARG_TYPES (oldtype)))))
1558 /* Function types may be shared, so we can't just modify
1559 the return type of olddecl's function type. */
1561 = build_function_type (TREE_TYPE (oldtype),
1562 tree_cons (NULL_TREE,
1563 TREE_VALUE (TYPE_ARG_TYPES (newtype)),
1564 TREE_CHAIN (TYPE_ARG_TYPES (oldtype))));
1565 trytype = build_type_attribute_variant (trytype,
1566 TYPE_ATTRIBUTES (oldtype));
1568 types_match = comptypes (newtype, trytype);
1572 if (! different_binding_level)
1573 TREE_TYPE (olddecl) = oldtype;
1577 /* If types don't match for a built-in, throw away the built-in. */
1578 warning_with_decl (newdecl, "conflicting types for built-in function `%s'");
1582 else if (TREE_CODE (olddecl) == FUNCTION_DECL
1583 && DECL_SOURCE_LINE (olddecl) == 0)
1585 /* A function declaration for a predeclared function
1586 that isn't actually built in. */
1587 if (!TREE_PUBLIC (newdecl))
1589 /* If you declare it as static, the
1590 default definition is overridden. */
1593 else if (!types_match)
1595 /* If the types don't match, preserve volatility indication.
1596 Later on, we will discard everything else about the
1597 default declaration. */
1598 TREE_THIS_VOLATILE (newdecl) |= TREE_THIS_VOLATILE (olddecl);
1601 /* Permit char *foo () to match void *foo (...) if not pedantic,
1602 if one of them came from a system header file. */
1603 else if (!types_match
1604 && TREE_CODE (olddecl) == FUNCTION_DECL
1605 && TREE_CODE (newdecl) == FUNCTION_DECL
1606 && TREE_CODE (TREE_TYPE (oldtype)) == POINTER_TYPE
1607 && TREE_CODE (TREE_TYPE (newtype)) == POINTER_TYPE
1608 && (DECL_IN_SYSTEM_HEADER (olddecl)
1609 || DECL_IN_SYSTEM_HEADER (newdecl))
1610 && ((TYPE_MAIN_VARIANT (TREE_TYPE (TREE_TYPE (newtype))) == void_type_node
1611 && TYPE_ARG_TYPES (oldtype) == 0
1612 && self_promoting_args_p (TYPE_ARG_TYPES (newtype))
1613 && TREE_TYPE (TREE_TYPE (oldtype)) == char_type_node)
1615 (TREE_TYPE (TREE_TYPE (newtype)) == char_type_node
1616 && TYPE_ARG_TYPES (newtype) == 0
1617 && self_promoting_args_p (TYPE_ARG_TYPES (oldtype))
1618 && TYPE_MAIN_VARIANT (TREE_TYPE (TREE_TYPE (oldtype))) == void_type_node)))
1621 pedwarn_with_decl (newdecl, "conflicting types for `%s'");
1622 /* Make sure we keep void * as ret type, not char *. */
1623 if (TYPE_MAIN_VARIANT (TREE_TYPE (TREE_TYPE (oldtype))) == void_type_node)
1624 TREE_TYPE (newdecl) = newtype = oldtype;
1626 /* Set DECL_IN_SYSTEM_HEADER, so that if we see another declaration
1627 we will come back here again. */
1628 DECL_IN_SYSTEM_HEADER (newdecl) = 1;
1630 else if (!types_match
1631 /* Permit char *foo (int, ...); followed by char *foo ();
1633 && ! (TREE_CODE (olddecl) == FUNCTION_DECL
1635 /* Return types must still match. */
1636 && comptypes (TREE_TYPE (oldtype),
1637 TREE_TYPE (newtype))
1638 && TYPE_ARG_TYPES (newtype) == 0))
1640 error_with_decl (newdecl, "conflicting types for `%s'");
1641 /* Check for function type mismatch
1642 involving an empty arglist vs a nonempty one. */
1643 if (TREE_CODE (olddecl) == FUNCTION_DECL
1644 && comptypes (TREE_TYPE (oldtype),
1645 TREE_TYPE (newtype))
1646 && ((TYPE_ARG_TYPES (oldtype) == 0
1647 && DECL_INITIAL (olddecl) == 0)
1649 (TYPE_ARG_TYPES (newtype) == 0
1650 && DECL_INITIAL (newdecl) == 0)))
1652 /* Classify the problem further. */
1653 tree t = TYPE_ARG_TYPES (oldtype);
1655 t = TYPE_ARG_TYPES (newtype);
1656 for (; t; t = TREE_CHAIN (t))
1658 tree type = TREE_VALUE (t);
1660 if (TREE_CHAIN (t) == 0
1661 && TYPE_MAIN_VARIANT (type) != void_type_node)
1663 error ("A parameter list with an ellipsis can't match an empty parameter name list declaration.");
1667 if (simple_type_promotes_to (type) != NULL_TREE)
1669 error ("An argument type that has a default promotion can't match an empty parameter name list declaration.");
1674 error_with_decl (olddecl, "previous declaration of `%s'");
1678 errmsg = redeclaration_error_message (newdecl, olddecl);
1684 error_with_decl (newdecl, "redefinition of `%s'");
1687 error_with_decl (newdecl, "redeclaration of `%s'");
1690 error_with_decl (newdecl, "conflicting declarations of `%s'");
1696 error_with_decl (olddecl,
1697 ((DECL_INITIAL (olddecl)
1698 && current_binding_level == global_binding_level)
1699 ? "`%s' previously defined here"
1700 : "`%s' previously declared here"));
1702 else if (TREE_CODE (newdecl) == TYPE_DECL
1703 && (DECL_IN_SYSTEM_HEADER (olddecl)
1704 || DECL_IN_SYSTEM_HEADER (newdecl)))
1706 warning_with_decl (newdecl, "redefinition of `%s'");
1709 ((DECL_INITIAL (olddecl)
1710 && current_binding_level == global_binding_level)
1711 ? "`%s' previously defined here"
1712 : "`%s' previously declared here"));
1714 else if (TREE_CODE (olddecl) == FUNCTION_DECL
1715 && DECL_INITIAL (olddecl) != 0
1716 && TYPE_ARG_TYPES (oldtype) == 0
1717 && TYPE_ARG_TYPES (newtype) != 0
1718 && TYPE_ACTUAL_ARG_TYPES (oldtype) != 0)
1722 /* Prototype decl follows defn w/o prototype. */
1724 for (parm = TYPE_ACTUAL_ARG_TYPES (oldtype),
1725 type = TYPE_ARG_TYPES (newtype),
1728 parm = TREE_CHAIN (parm), type = TREE_CHAIN (type), nargs++)
1730 if (TYPE_MAIN_VARIANT (TREE_VALUE (parm)) == void_type_node
1731 && TYPE_MAIN_VARIANT (TREE_VALUE (type)) == void_type_node)
1733 warning_with_decl (newdecl, "prototype for `%s' follows");
1734 warning_with_decl (olddecl, "non-prototype definition here");
1737 if (TYPE_MAIN_VARIANT (TREE_VALUE (parm)) == void_type_node
1738 || TYPE_MAIN_VARIANT (TREE_VALUE (type)) == void_type_node)
1740 error_with_decl (newdecl,
1741 "prototype for `%s' follows and number of arguments doesn't match");
1742 error_with_decl (olddecl, "non-prototype definition here");
1746 /* Type for passing arg must be consistent
1747 with that declared for the arg. */
1748 if (! comptypes (TREE_VALUE (parm), TREE_VALUE (type))
1749 /* If -traditional, allow `unsigned int' instead of `int'
1750 in the prototype. */
1751 && (! (flag_traditional
1752 && TYPE_MAIN_VARIANT (TREE_VALUE (parm)) == integer_type_node
1753 && TYPE_MAIN_VARIANT (TREE_VALUE (type)) == unsigned_type_node)))
1755 error_with_decl (newdecl,
1756 "prototype for `%s' follows and argument %d doesn't match",
1758 error_with_decl (olddecl, "non-prototype definition here");
1764 /* Warn about mismatches in various flags. */
1767 /* Warn if function is now inline
1768 but was previously declared not inline and has been called. */
1769 if (TREE_CODE (olddecl) == FUNCTION_DECL
1770 && ! DECL_DECLARED_INLINE_P (olddecl)
1771 && DECL_DECLARED_INLINE_P (newdecl)
1772 && TREE_USED (olddecl))
1773 warning_with_decl (newdecl,
1774 "`%s' declared inline after being called");
1775 if (TREE_CODE (olddecl) == FUNCTION_DECL
1776 && ! DECL_DECLARED_INLINE_P (olddecl)
1777 && DECL_DECLARED_INLINE_P (newdecl)
1778 && DECL_INITIAL (olddecl) != 0)
1779 warning_with_decl (newdecl,
1780 "`%s' declared inline after its definition");
1782 /* If pedantic, warn when static declaration follows a non-static
1783 declaration. Otherwise, do so only for functions. */
1784 if ((pedantic || TREE_CODE (olddecl) == FUNCTION_DECL)
1785 && TREE_PUBLIC (olddecl)
1786 && !TREE_PUBLIC (newdecl))
1787 warning_with_decl (newdecl, "static declaration for `%s' follows non-static");
1789 /* If warn_traditional, warn when a non-static function
1790 declaration follows a static one. */
1791 if (warn_traditional && !in_system_header
1792 && TREE_CODE (olddecl) == FUNCTION_DECL
1793 && !TREE_PUBLIC (olddecl)
1794 && TREE_PUBLIC (newdecl))
1795 warning_with_decl (newdecl, "non-static declaration for `%s' follows static");
1797 /* Warn when const declaration follows a non-const
1798 declaration, but not for functions. */
1799 if (TREE_CODE (olddecl) != FUNCTION_DECL
1800 && !TREE_READONLY (olddecl)
1801 && TREE_READONLY (newdecl))
1802 warning_with_decl (newdecl, "const declaration for `%s' follows non-const");
1803 /* These bits are logically part of the type, for variables.
1804 But not for functions
1805 (where qualifiers are not valid ANSI anyway). */
1806 else if (pedantic && TREE_CODE (olddecl) != FUNCTION_DECL
1807 && (TREE_READONLY (newdecl) != TREE_READONLY (olddecl)
1808 || TREE_THIS_VOLATILE (newdecl) != TREE_THIS_VOLATILE (olddecl)))
1809 pedwarn_with_decl (newdecl, "type qualifiers for `%s' conflict with previous decl");
1813 /* Optionally warn about more than one declaration for the same name. */
1814 if (errmsg == 0 && warn_redundant_decls && DECL_SOURCE_LINE (olddecl) != 0
1815 /* Don't warn about a function declaration
1816 followed by a definition. */
1817 && !(TREE_CODE (newdecl) == FUNCTION_DECL && DECL_INITIAL (newdecl) != 0
1818 && DECL_INITIAL (olddecl) == 0)
1819 /* Don't warn about extern decl followed by (tentative) definition. */
1820 && !(DECL_EXTERNAL (olddecl) && ! DECL_EXTERNAL (newdecl)))
1822 warning_with_decl (newdecl, "redundant redeclaration of `%s' in same scope");
1823 warning_with_decl (olddecl, "previous declaration of `%s'");
1826 /* Copy all the DECL_... slots specified in the new decl
1827 except for any that we copy here from the old type.
1829 Past this point, we don't change OLDTYPE and NEWTYPE
1830 even if we change the types of NEWDECL and OLDDECL. */
1834 /* When copying info to olddecl, we store into write_olddecl
1835 instead. This allows us to avoid modifying olddecl when
1836 different_binding_level is true. */
1837 tree write_olddecl = different_binding_level ? newdecl : olddecl;
1839 /* Merge the data types specified in the two decls. */
1840 if (TREE_CODE (newdecl) != FUNCTION_DECL || !DECL_BUILT_IN (olddecl))
1842 if (different_binding_level)
1844 if (TYPE_ARG_TYPES (oldtype) != 0
1845 && TYPE_ARG_TYPES (newtype) == 0)
1846 TREE_TYPE (newdecl) = common_type (newtype, oldtype);
1849 = build_type_attribute_variant
1851 merge_attributes (TYPE_ATTRIBUTES (newtype),
1852 TYPE_ATTRIBUTES (oldtype)));
1856 = TREE_TYPE (olddecl)
1857 = common_type (newtype, oldtype);
1860 /* Lay the type out, unless already done. */
1861 if (oldtype != TREE_TYPE (newdecl))
1863 if (TREE_TYPE (newdecl) != error_mark_node)
1864 layout_type (TREE_TYPE (newdecl));
1865 if (TREE_CODE (newdecl) != FUNCTION_DECL
1866 && TREE_CODE (newdecl) != TYPE_DECL
1867 && TREE_CODE (newdecl) != CONST_DECL)
1868 layout_decl (newdecl, 0);
1872 /* Since the type is OLDDECL's, make OLDDECL's size go with. */
1873 DECL_SIZE (newdecl) = DECL_SIZE (olddecl);
1874 DECL_SIZE_UNIT (newdecl) = DECL_SIZE_UNIT (olddecl);
1875 DECL_MODE (newdecl) = DECL_MODE (olddecl);
1876 if (TREE_CODE (olddecl) != FUNCTION_DECL)
1877 if (DECL_ALIGN (olddecl) > DECL_ALIGN (newdecl))
1879 DECL_ALIGN (newdecl) = DECL_ALIGN (olddecl);
1880 DECL_USER_ALIGN (newdecl) |= DECL_ALIGN (olddecl);
1884 /* Keep the old rtl since we can safely use it. */
1885 COPY_DECL_RTL (olddecl, newdecl);
1887 /* Merge the type qualifiers. */
1888 if (TREE_CODE (olddecl) == FUNCTION_DECL
1889 && DECL_BUILT_IN_NONANSI (olddecl) && TREE_THIS_VOLATILE (olddecl)
1890 && ! TREE_THIS_VOLATILE (newdecl))
1891 TREE_THIS_VOLATILE (write_olddecl) = 0;
1893 if (TREE_READONLY (newdecl))
1894 TREE_READONLY (write_olddecl) = 1;
1896 if (TREE_THIS_VOLATILE (newdecl))
1898 TREE_THIS_VOLATILE (write_olddecl) = 1;
1899 if (TREE_CODE (newdecl) == VAR_DECL
1900 /* If an automatic variable is re-declared in the same
1901 function scope, but the old declaration was not
1902 volatile, make_var_volatile() would crash because the
1903 variable would have been assigned to a pseudo, not a
1904 MEM. Since this duplicate declaration is invalid
1905 anyway, we just skip the call. */
1907 make_var_volatile (newdecl);
1910 /* Keep source location of definition rather than declaration. */
1911 /* When called with different_binding_level set, keep the old
1912 information so that meaningful diagnostics can be given. */
1913 if (DECL_INITIAL (newdecl) == 0 && DECL_INITIAL (olddecl) != 0
1914 && ! different_binding_level)
1916 DECL_SOURCE_LINE (newdecl) = DECL_SOURCE_LINE (olddecl);
1917 DECL_SOURCE_FILE (newdecl) = DECL_SOURCE_FILE (olddecl);
1920 /* Merge the unused-warning information. */
1921 if (DECL_IN_SYSTEM_HEADER (olddecl))
1922 DECL_IN_SYSTEM_HEADER (newdecl) = 1;
1923 else if (DECL_IN_SYSTEM_HEADER (newdecl))
1924 DECL_IN_SYSTEM_HEADER (write_olddecl) = 1;
1926 /* Merge the initialization information. */
1927 /* When called with different_binding_level set, don't copy over
1928 DECL_INITIAL, so that we don't accidentally change function
1929 declarations into function definitions. */
1930 if (DECL_INITIAL (newdecl) == 0 && ! different_binding_level)
1931 DECL_INITIAL (newdecl) = DECL_INITIAL (olddecl);
1933 /* Merge the section attribute.
1934 We want to issue an error if the sections conflict but that must be
1935 done later in decl_attributes since we are called before attributes
1937 if (DECL_SECTION_NAME (newdecl) == NULL_TREE)
1938 DECL_SECTION_NAME (newdecl) = DECL_SECTION_NAME (olddecl);
1940 /* Copy the assembler name.
1941 Currently, it can only be defined in the prototype. */
1942 COPY_DECL_ASSEMBLER_NAME (olddecl, newdecl);
1944 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1946 DECL_STATIC_CONSTRUCTOR(newdecl) |= DECL_STATIC_CONSTRUCTOR(olddecl);
1947 DECL_STATIC_DESTRUCTOR (newdecl) |= DECL_STATIC_DESTRUCTOR (olddecl);
1949 DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (newdecl)
1950 |= DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (olddecl);
1951 DECL_NO_CHECK_MEMORY_USAGE (newdecl)
1952 |= DECL_NO_CHECK_MEMORY_USAGE (olddecl);
1953 DECL_NO_LIMIT_STACK (newdecl)
1954 |= DECL_NO_LIMIT_STACK (olddecl);
1957 /* If cannot merge, then use the new type and qualifiers,
1958 and don't preserve the old rtl. */
1959 else if (! different_binding_level)
1961 TREE_TYPE (olddecl) = TREE_TYPE (newdecl);
1962 TREE_READONLY (olddecl) = TREE_READONLY (newdecl);
1963 TREE_THIS_VOLATILE (olddecl) = TREE_THIS_VOLATILE (newdecl);
1964 TREE_SIDE_EFFECTS (olddecl) = TREE_SIDE_EFFECTS (newdecl);
1967 /* Merge the storage class information. */
1968 DECL_WEAK (newdecl) |= DECL_WEAK (olddecl);
1969 /* For functions, static overrides non-static. */
1970 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1972 TREE_PUBLIC (newdecl) &= TREE_PUBLIC (olddecl);
1973 /* This is since we don't automatically
1974 copy the attributes of NEWDECL into OLDDECL. */
1975 /* No need to worry about different_binding_level here because
1976 then TREE_PUBLIC (newdecl) was true. */
1977 TREE_PUBLIC (olddecl) = TREE_PUBLIC (newdecl);
1978 /* If this clears `static', clear it in the identifier too. */
1979 if (! TREE_PUBLIC (olddecl))
1980 TREE_PUBLIC (DECL_NAME (olddecl)) = 0;
1982 if (DECL_EXTERNAL (newdecl))
1984 if (! different_binding_level)
1986 /* Don't mess with these flags on local externs; they remain
1987 external even if there's a declaration at file scope which
1989 TREE_STATIC (newdecl) = TREE_STATIC (olddecl);
1990 DECL_EXTERNAL (newdecl) = DECL_EXTERNAL (olddecl);
1992 /* An extern decl does not override previous storage class. */
1993 TREE_PUBLIC (newdecl) = TREE_PUBLIC (olddecl);
1994 if (! DECL_EXTERNAL (newdecl))
1995 DECL_CONTEXT (newdecl) = DECL_CONTEXT (olddecl);
1999 TREE_STATIC (olddecl) = TREE_STATIC (newdecl);
2000 TREE_PUBLIC (olddecl) = TREE_PUBLIC (newdecl);
2003 if (TREE_CODE (newdecl) == FUNCTION_DECL)
2005 /* If we're redefining a function previously defined as extern
2006 inline, make sure we emit debug info for the inline before we
2007 throw it away, in case it was inlined into a function that hasn't
2008 been written out yet. */
2009 if (new_is_definition && DECL_INITIAL (olddecl) && TREE_USED (olddecl))
2011 (*debug_hooks->outlining_inline_function) (olddecl);
2013 /* The new defn must not be inline. */
2014 DECL_INLINE (newdecl) = 0;
2015 DECL_UNINLINABLE (newdecl) = 1;
2019 /* If either decl says `inline', this fn is inline,
2020 unless its definition was passed already. */
2021 if (DECL_DECLARED_INLINE_P (newdecl)
2022 && DECL_DECLARED_INLINE_P (olddecl) == 0)
2023 DECL_DECLARED_INLINE_P (olddecl) = 1;
2025 DECL_DECLARED_INLINE_P (newdecl) = DECL_DECLARED_INLINE_P (olddecl);
2027 DECL_UNINLINABLE (newdecl) = DECL_UNINLINABLE (olddecl)
2028 = (DECL_UNINLINABLE (newdecl) || DECL_UNINLINABLE (olddecl));
2031 if (DECL_BUILT_IN (olddecl))
2033 /* Get rid of any built-in function if new arg types don't match it
2034 or if we have a function definition. */
2035 if (! types_match || new_is_definition)
2037 if (! different_binding_level)
2039 TREE_TYPE (olddecl) = TREE_TYPE (newdecl);
2040 DECL_BUILT_IN_CLASS (olddecl) = NOT_BUILT_IN;
2045 /* If redeclaring a builtin function, and not a definition,
2046 it stays built in. */
2047 DECL_BUILT_IN_CLASS (newdecl) = DECL_BUILT_IN_CLASS (olddecl);
2048 DECL_FUNCTION_CODE (newdecl) = DECL_FUNCTION_CODE (olddecl);
2051 /* Also preserve various other info from the definition. */
2052 else if (! new_is_definition)
2053 DECL_NUM_STMTS (newdecl) = DECL_NUM_STMTS (olddecl);
2054 if (! new_is_definition)
2056 DECL_RESULT (newdecl) = DECL_RESULT (olddecl);
2057 /* When called with different_binding_level set, don't copy over
2058 DECL_INITIAL, so that we don't accidentally change function
2059 declarations into function definitions. */
2060 if (! different_binding_level)
2061 DECL_INITIAL (newdecl) = DECL_INITIAL (olddecl);
2062 DECL_SAVED_INSNS (newdecl) = DECL_SAVED_INSNS (olddecl);
2063 DECL_ARGUMENTS (newdecl) = DECL_ARGUMENTS (olddecl);
2064 if (DECL_INLINE (newdecl))
2065 DECL_ABSTRACT_ORIGIN (newdecl) = DECL_ABSTRACT_ORIGIN (olddecl);
2068 if (different_binding_level)
2071 /* Copy most of the decl-specific fields of NEWDECL into OLDDECL.
2072 But preserve OLDDECL's DECL_UID. */
2074 unsigned olddecl_uid = DECL_UID (olddecl);
2076 memcpy ((char *) olddecl + sizeof (struct tree_common),
2077 (char *) newdecl + sizeof (struct tree_common),
2078 sizeof (struct tree_decl) - sizeof (struct tree_common));
2079 DECL_UID (olddecl) = olddecl_uid;
2082 /* NEWDECL contains the merged attribute lists.
2083 Update OLDDECL to be the same. */
2084 DECL_ATTRIBUTES (olddecl) = DECL_ATTRIBUTES (newdecl);
2089 /* Record a decl-node X as belonging to the current lexical scope.
2090 Check for errors (such as an incompatible declaration for the same
2091 name already seen in the same scope).
2093 Returns either X or an old decl for the same name.
2094 If an old decl is returned, it may have been smashed
2095 to agree with what X says. */
2102 tree name = DECL_NAME (x);
2103 struct binding_level *b = current_binding_level;
2105 /* Functions need the lang_decl data. */
2106 if (TREE_CODE (x) == FUNCTION_DECL && ! DECL_LANG_SPECIFIC (x))
2107 DECL_LANG_SPECIFIC (x) = (struct lang_decl *)
2108 ggc_alloc_cleared (sizeof (struct lang_decl));
2110 DECL_CONTEXT (x) = current_function_decl;
2111 /* A local extern declaration for a function doesn't constitute nesting.
2112 A local auto declaration does, since it's a forward decl
2113 for a nested function coming later. */
2114 if ((TREE_CODE (x) == FUNCTION_DECL || TREE_CODE (x) == VAR_DECL)
2115 && DECL_INITIAL (x) == 0 && DECL_EXTERNAL (x))
2116 DECL_CONTEXT (x) = 0;
2118 if (warn_nested_externs && DECL_EXTERNAL (x) && b != global_binding_level
2119 && x != IDENTIFIER_IMPLICIT_DECL (name)
2120 /* Don't print error messages for __FUNCTION__ and __PRETTY_FUNCTION__ */
2121 && !DECL_IN_SYSTEM_HEADER (x))
2122 warning ("nested extern declaration of `%s'", IDENTIFIER_POINTER (name));
2128 int different_binding_level = 0;
2130 t = lookup_name_current_level (name);
2131 /* Don't type check externs here when -traditional. This is so that
2132 code with conflicting declarations inside blocks will get warnings
2133 not errors. X11 for instance depends on this. */
2134 if (! t && DECL_EXTERNAL (x) && TREE_PUBLIC (x) && ! flag_traditional)
2136 t = IDENTIFIER_GLOBAL_VALUE (name);
2137 /* Type decls at global scope don't conflict with externs declared
2138 inside lexical blocks. */
2139 if (t && TREE_CODE (t) == TYPE_DECL)
2141 different_binding_level = 1;
2143 if (t != 0 && t == error_mark_node)
2144 /* error_mark_node is 0 for a while during initialization! */
2147 error_with_decl (x, "`%s' used prior to declaration");
2152 file = DECL_SOURCE_FILE (t);
2153 line = DECL_SOURCE_LINE (t);
2156 /* If this decl is `static' and an implicit decl was seen previously,
2157 warn. But don't complain if -traditional,
2158 since traditional compilers don't complain. */
2159 if (! flag_traditional && TREE_PUBLIC (name)
2160 /* Don't test for DECL_EXTERNAL, because grokdeclarator
2161 sets this for all functions. */
2162 && ! TREE_PUBLIC (x)
2163 && (TREE_CODE (x) == FUNCTION_DECL || b == global_binding_level)
2164 /* We used to warn also for explicit extern followed by static,
2165 but sometimes you need to do it that way. */
2166 && IDENTIFIER_IMPLICIT_DECL (name) != 0)
2168 pedwarn ("`%s' was declared implicitly `extern' and later `static'",
2169 IDENTIFIER_POINTER (name));
2170 pedwarn_with_file_and_line
2171 (DECL_SOURCE_FILE (IDENTIFIER_IMPLICIT_DECL (name)),
2172 DECL_SOURCE_LINE (IDENTIFIER_IMPLICIT_DECL (name)),
2173 "previous declaration of `%s'",
2174 IDENTIFIER_POINTER (name));
2175 TREE_THIS_VOLATILE (name) = 1;
2178 if (t != 0 && duplicate_decls (x, t, different_binding_level))
2180 if (TREE_CODE (t) == PARM_DECL)
2182 /* Don't allow more than one "real" duplicate
2183 of a forward parm decl. */
2184 TREE_ASM_WRITTEN (t) = TREE_ASM_WRITTEN (x);
2190 /* If we are processing a typedef statement, generate a whole new
2191 ..._TYPE node (which will be just an variant of the existing
2192 ..._TYPE node with identical properties) and then install the
2193 TYPE_DECL node generated to represent the typedef name as the
2194 TYPE_NAME of this brand new (duplicate) ..._TYPE node.
2196 The whole point here is to end up with a situation where each
2197 and every ..._TYPE node the compiler creates will be uniquely
2198 associated with AT MOST one node representing a typedef name.
2199 This way, even though the compiler substitutes corresponding
2200 ..._TYPE nodes for TYPE_DECL (i.e. "typedef name") nodes very
2201 early on, later parts of the compiler can always do the reverse
2202 translation and get back the corresponding typedef name. For
2205 typedef struct S MY_TYPE;
2208 Later parts of the compiler might only know that `object' was of
2209 type `struct S' if it were not for code just below. With this
2210 code however, later parts of the compiler see something like:
2212 struct S' == struct S
2213 typedef struct S' MY_TYPE;
2216 And they can then deduce (from the node for type struct S') that
2217 the original object declaration was:
2221 Being able to do this is important for proper support of protoize,
2222 and also for generating precise symbolic debugging information
2223 which takes full account of the programmer's (typedef) vocabulary.
2225 Obviously, we don't want to generate a duplicate ..._TYPE node if
2226 the TYPE_DECL node that we are now processing really represents a
2227 standard built-in type.
2229 Since all standard types are effectively declared at line zero
2230 in the source file, we can easily check to see if we are working
2231 on a standard type by checking the current value of lineno. */
2233 if (TREE_CODE (x) == TYPE_DECL)
2235 if (DECL_SOURCE_LINE (x) == 0)
2237 if (TYPE_NAME (TREE_TYPE (x)) == 0)
2238 TYPE_NAME (TREE_TYPE (x)) = x;
2240 else if (TREE_TYPE (x) != error_mark_node
2241 && DECL_ORIGINAL_TYPE (x) == NULL_TREE)
2243 tree tt = TREE_TYPE (x);
2244 DECL_ORIGINAL_TYPE (x) = tt;
2245 tt = build_type_copy (tt);
2247 TREE_USED (tt) = TREE_USED (x);
2252 /* Multiple external decls of the same identifier ought to match.
2253 Check against both global declarations (when traditional) and out of
2254 scope (limbo) block level declarations.
2256 We get warnings about inline functions where they are defined.
2257 Avoid duplicate warnings where they are used. */
2259 && ! (TREE_CODE (x) == FUNCTION_DECL && DECL_INLINE (x)))
2263 if (flag_traditional && IDENTIFIER_GLOBAL_VALUE (name) != 0
2264 && (DECL_EXTERNAL (IDENTIFIER_GLOBAL_VALUE (name))
2265 || TREE_PUBLIC (IDENTIFIER_GLOBAL_VALUE (name))))
2266 decl = IDENTIFIER_GLOBAL_VALUE (name);
2267 else if (IDENTIFIER_LIMBO_VALUE (name) != 0)
2268 /* Decls in limbo are always extern, so no need to check that. */
2269 decl = IDENTIFIER_LIMBO_VALUE (name);
2273 if (decl && ! comptypes (TREE_TYPE (x), TREE_TYPE (decl))
2274 /* If old decl is built-in, we already warned if we should. */
2275 && !DECL_BUILT_IN (decl))
2277 pedwarn_with_decl (x,
2278 "type mismatch with previous external decl");
2279 pedwarn_with_decl (decl, "previous external decl of `%s'");
2283 /* If a function has had an implicit declaration, and then is defined,
2284 make sure they are compatible. */
2286 if (IDENTIFIER_IMPLICIT_DECL (name) != 0
2287 && IDENTIFIER_GLOBAL_VALUE (name) == 0
2288 && TREE_CODE (x) == FUNCTION_DECL
2289 && ! comptypes (TREE_TYPE (x),
2290 TREE_TYPE (IDENTIFIER_IMPLICIT_DECL (name))))
2292 warning_with_decl (x, "type mismatch with previous implicit declaration");
2293 warning_with_decl (IDENTIFIER_IMPLICIT_DECL (name),
2294 "previous implicit declaration of `%s'");
2297 /* In PCC-compatibility mode, extern decls of vars with no current decl
2298 take effect at top level no matter where they are. */
2299 if (flag_traditional && DECL_EXTERNAL (x)
2300 && lookup_name (name) == 0)
2302 tree type = TREE_TYPE (x);
2304 /* But don't do this if the type contains temporary nodes. */
2307 if (type == error_mark_node)
2309 if (TYPE_CONTEXT (type))
2311 warning_with_decl (x, "type of external `%s' is not global");
2312 /* By exiting the loop early, we leave TYPE nonzero,
2313 and thus prevent globalization of the decl. */
2316 else if (TREE_CODE (type) == FUNCTION_TYPE
2317 && TYPE_ARG_TYPES (type) != 0)
2318 /* The types might not be truly local,
2319 but the list of arg types certainly is temporary.
2320 Since prototypes are nontraditional,
2321 ok not to do the traditional thing. */
2323 type = TREE_TYPE (type);
2327 b = global_binding_level;
2330 /* This name is new in its binding level.
2331 Install the new declaration and return it. */
2332 if (b == global_binding_level)
2334 /* Install a global value. */
2336 /* If the first global decl has external linkage,
2337 warn if we later see static one. */
2338 if (IDENTIFIER_GLOBAL_VALUE (name) == 0 && TREE_PUBLIC (x))
2339 TREE_PUBLIC (name) = 1;
2341 IDENTIFIER_GLOBAL_VALUE (name) = x;
2343 /* We no longer care about any previous block level declarations. */
2344 IDENTIFIER_LIMBO_VALUE (name) = 0;
2346 /* Don't forget if the function was used via an implicit decl. */
2347 if (IDENTIFIER_IMPLICIT_DECL (name)
2348 && TREE_USED (IDENTIFIER_IMPLICIT_DECL (name)))
2349 TREE_USED (x) = 1, TREE_USED (name) = 1;
2351 /* Don't forget if its address was taken in that way. */
2352 if (IDENTIFIER_IMPLICIT_DECL (name)
2353 && TREE_ADDRESSABLE (IDENTIFIER_IMPLICIT_DECL (name)))
2354 TREE_ADDRESSABLE (x) = 1;
2356 /* Warn about mismatches against previous implicit decl. */
2357 if (IDENTIFIER_IMPLICIT_DECL (name) != 0
2358 /* If this real decl matches the implicit, don't complain. */
2359 && ! (TREE_CODE (x) == FUNCTION_DECL
2360 && (TYPE_MAIN_VARIANT (TREE_TYPE (TREE_TYPE (x)))
2361 == integer_type_node)))
2362 pedwarn ("`%s' was previously implicitly declared to return `int'",
2363 IDENTIFIER_POINTER (name));
2365 /* If this decl is `static' and an `extern' was seen previously,
2366 that is erroneous. */
2367 if (TREE_PUBLIC (name)
2368 && ! TREE_PUBLIC (x) && ! DECL_EXTERNAL (x))
2370 /* Okay to redeclare an ANSI built-in as static. */
2371 if (t != 0 && DECL_BUILT_IN (t))
2373 /* Okay to declare a non-ANSI built-in as anything. */
2374 else if (t != 0 && DECL_BUILT_IN_NONANSI (t))
2376 /* Okay to have global type decl after an earlier extern
2377 declaration inside a lexical block. */
2378 else if (TREE_CODE (x) == TYPE_DECL)
2380 else if (IDENTIFIER_IMPLICIT_DECL (name))
2382 if (! TREE_THIS_VOLATILE (name))
2383 pedwarn ("`%s' was declared implicitly `extern' and later `static'",
2384 IDENTIFIER_POINTER (name));
2387 pedwarn ("`%s' was declared `extern' and later `static'",
2388 IDENTIFIER_POINTER (name));
2393 /* Here to install a non-global value. */
2394 tree oldlocal = IDENTIFIER_LOCAL_VALUE (name);
2395 tree oldglobal = IDENTIFIER_GLOBAL_VALUE (name);
2397 IDENTIFIER_LOCAL_VALUE (name) = x;
2399 /* If this is an extern function declaration, see if we
2400 have a global definition or declaration for the function. */
2403 && TREE_CODE (x) == FUNCTION_DECL
2404 && TREE_CODE (oldglobal) == FUNCTION_DECL
2405 && DECL_EXTERNAL (x)
2406 && ! DECL_DECLARED_INLINE_P (x))
2408 /* We have one. Their types must agree. */
2409 if (! comptypes (TREE_TYPE (x),
2410 TREE_TYPE (IDENTIFIER_GLOBAL_VALUE (name))))
2411 pedwarn_with_decl (x, "extern declaration of `%s' doesn't match global one");
2414 /* Inner extern decl is inline if global one is.
2415 Copy enough to really inline it. */
2416 if (DECL_DECLARED_INLINE_P (oldglobal))
2418 DECL_DECLARED_INLINE_P (x)
2419 = DECL_DECLARED_INLINE_P (oldglobal);
2420 DECL_INLINE (x) = DECL_INLINE (oldglobal);
2421 DECL_INITIAL (x) = (current_function_decl == oldglobal
2422 ? 0 : DECL_INITIAL (oldglobal));
2423 DECL_SAVED_INSNS (x) = DECL_SAVED_INSNS (oldglobal);
2424 DECL_NUM_STMTS (x) = DECL_NUM_STMTS (oldglobal);
2425 DECL_ARGUMENTS (x) = DECL_ARGUMENTS (oldglobal);
2426 DECL_RESULT (x) = DECL_RESULT (oldglobal);
2427 TREE_ASM_WRITTEN (x) = TREE_ASM_WRITTEN (oldglobal);
2428 DECL_ABSTRACT_ORIGIN (x)
2429 = DECL_ABSTRACT_ORIGIN (oldglobal);
2431 /* Inner extern decl is built-in if global one is. */
2432 if (DECL_BUILT_IN (oldglobal))
2434 DECL_BUILT_IN_CLASS (x) = DECL_BUILT_IN_CLASS (oldglobal);
2435 DECL_FUNCTION_CODE (x) = DECL_FUNCTION_CODE (oldglobal);
2437 /* Keep the arg types from a file-scope fcn defn. */
2438 if (TYPE_ARG_TYPES (TREE_TYPE (oldglobal)) != 0
2439 && DECL_INITIAL (oldglobal)
2440 && TYPE_ARG_TYPES (TREE_TYPE (x)) == 0)
2441 TREE_TYPE (x) = TREE_TYPE (oldglobal);
2446 /* This case is probably sometimes the right thing to do. */
2447 /* If we have a local external declaration,
2448 then any file-scope declaration should not
2449 have been static. */
2450 if (oldlocal == 0 && oldglobal != 0
2451 && !TREE_PUBLIC (oldglobal)
2452 && DECL_EXTERNAL (x) && TREE_PUBLIC (x))
2453 warning ("`%s' locally external but globally static",
2454 IDENTIFIER_POINTER (name));
2457 /* If we have a local external declaration,
2458 and no file-scope declaration has yet been seen,
2459 then if we later have a file-scope decl it must not be static. */
2461 && DECL_EXTERNAL (x)
2465 TREE_PUBLIC (name) = 1;
2467 /* Save this decl, so that we can do type checking against
2468 other decls after it falls out of scope.
2470 Only save it once. This prevents temporary decls created in
2471 expand_inline_function from being used here, since this
2472 will have been set when the inline function was parsed.
2473 It also helps give slightly better warnings. */
2474 if (IDENTIFIER_LIMBO_VALUE (name) == 0)
2475 IDENTIFIER_LIMBO_VALUE (name) = x;
2478 /* Warn if shadowing an argument at the top level of the body. */
2479 if (oldlocal != 0 && !DECL_EXTERNAL (x)
2480 /* This warning doesn't apply to the parms of a nested fcn. */
2481 && ! current_binding_level->parm_flag
2482 /* Check that this is one level down from the parms. */
2483 && current_binding_level->level_chain->parm_flag
2484 /* Check that the decl being shadowed
2485 comes from the parm level, one level up. */
2486 && chain_member (oldlocal, current_binding_level->level_chain->names))
2488 if (TREE_CODE (oldlocal) == PARM_DECL)
2489 pedwarn ("declaration of `%s' shadows a parameter",
2490 IDENTIFIER_POINTER (name));
2492 pedwarn ("declaration of `%s' shadows a symbol from the parameter list",
2493 IDENTIFIER_POINTER (name));
2496 /* Maybe warn if shadowing something else. */
2497 else if (warn_shadow && !DECL_EXTERNAL (x)
2498 /* No shadow warnings for internally generated vars. */
2499 && DECL_SOURCE_LINE (x) != 0
2500 /* No shadow warnings for vars made for inlining. */
2501 && ! DECL_FROM_INLINE (x))
2503 const char *id = IDENTIFIER_POINTER (name);
2505 if (TREE_CODE (x) == PARM_DECL
2506 && current_binding_level->level_chain->parm_flag)
2507 /* Don't warn about the parm names in function declarator
2508 within a function declarator.
2509 It would be nice to avoid warning in any function
2510 declarator in a declaration, as opposed to a definition,
2511 but there is no way to tell it's not a definition. */
2513 else if (oldlocal != 0 && TREE_CODE (oldlocal) == PARM_DECL)
2514 warning ("declaration of `%s' shadows a parameter", id);
2515 else if (oldlocal != 0)
2516 warning ("declaration of `%s' shadows previous local", id);
2517 else if (IDENTIFIER_GLOBAL_VALUE (name) != 0
2518 && IDENTIFIER_GLOBAL_VALUE (name) != error_mark_node)
2519 warning ("declaration of `%s' shadows global declaration", id);
2522 /* If storing a local value, there may already be one (inherited).
2523 If so, record it for restoration when this binding level ends. */
2525 b->shadowed = tree_cons (name, oldlocal, b->shadowed);
2528 /* Keep count of variables in this level with incomplete type.
2529 If the input is erroneous, we can have error_mark in the type
2530 slot (e.g. "f(void a, ...)") - that doesn't count as an
2532 if (TREE_TYPE (x) != error_mark_node
2533 && !COMPLETE_TYPE_P (TREE_TYPE (x)))
2537 /* Put decls on list in reverse order.
2538 We will reverse them later if necessary. */
2539 TREE_CHAIN (x) = b->names;
2545 /* Like pushdecl, only it places X in GLOBAL_BINDING_LEVEL, if appropriate. */
2548 pushdecl_top_level (x)
2552 struct binding_level *b = current_binding_level;
2554 current_binding_level = global_binding_level;
2556 current_binding_level = b;
2560 /* Generate an implicit declaration for identifier FUNCTIONID
2561 as a function of type int (). Print a warning if appropriate. */
2564 implicitly_declare (functionid)
2568 int traditional_warning = 0;
2569 /* Only one "implicit declaration" warning per identifier. */
2570 int implicit_warning;
2572 /* We used to reuse an old implicit decl here,
2573 but this loses with inline functions because it can clobber
2574 the saved decl chains. */
2576 if (IDENTIFIER_IMPLICIT_DECL (functionid) != 0)
2577 decl = IDENTIFIER_IMPLICIT_DECL (functionid);
2580 decl = build_decl (FUNCTION_DECL, functionid, default_function_type);
2582 /* Warn of implicit decl following explicit local extern decl.
2583 This is probably a program designed for traditional C. */
2584 if (TREE_PUBLIC (functionid) && IDENTIFIER_GLOBAL_VALUE (functionid) == 0)
2585 traditional_warning = 1;
2587 /* Warn once of an implicit declaration. */
2588 implicit_warning = (IDENTIFIER_IMPLICIT_DECL (functionid) == 0);
2590 DECL_EXTERNAL (decl) = 1;
2591 TREE_PUBLIC (decl) = 1;
2593 /* Record that we have an implicit decl and this is it. */
2594 IDENTIFIER_IMPLICIT_DECL (functionid) = decl;
2596 /* ANSI standard says implicit declarations are in the innermost block.
2597 So we record the decl in the standard fashion.
2598 If flag_traditional is set, pushdecl does it top-level. */
2601 /* This is a no-op in c-lang.c or something real in objc-actions.c. */
2602 maybe_objc_check_decl (decl);
2604 rest_of_decl_compilation (decl, NULL, 0, 0);
2606 if (implicit_warning)
2607 implicit_decl_warning (functionid);
2608 else if (warn_traditional && traditional_warning)
2609 warning ("function `%s' was previously declared within a block",
2610 IDENTIFIER_POINTER (functionid));
2612 /* Write a record describing this implicit function declaration to the
2613 prototypes file (if requested). */
2615 gen_aux_info_record (decl, 0, 1, 0);
2617 /* Possibly apply some default attributes to this implicit declaration. */
2618 decl_attributes (&decl, NULL_TREE, 0);
2624 implicit_decl_warning (id)
2627 const char *name = IDENTIFIER_POINTER (id);
2628 if (mesg_implicit_function_declaration == 2)
2629 error ("implicit declaration of function `%s'", name);
2630 else if (mesg_implicit_function_declaration == 1)
2631 warning ("implicit declaration of function `%s'", name);
2634 /* Return zero if the declaration NEWDECL is valid
2635 when the declaration OLDDECL (assumed to be for the same name)
2636 has already been seen.
2637 Otherwise return 1 if NEWDECL is a redefinition, 2 if it is a redeclaration,
2638 and 3 if it is a conflicting declaration. */
2641 redeclaration_error_message (newdecl, olddecl)
2642 tree newdecl, olddecl;
2644 if (TREE_CODE (newdecl) == TYPE_DECL)
2646 if (flag_traditional && TREE_TYPE (newdecl) == TREE_TYPE (olddecl))
2648 /* pushdecl creates distinct types for TYPE_DECLs by calling
2649 build_type_copy, so the above comparison generally fails. We do
2650 another test against the TYPE_MAIN_VARIANT of the olddecl, which
2651 is equivalent to what this code used to do before the build_type_copy
2652 call. The variant type distinction should not matter for traditional
2653 code, because it doesn't have type qualifiers. */
2654 if (flag_traditional
2655 && TYPE_MAIN_VARIANT (TREE_TYPE (olddecl)) == TREE_TYPE (newdecl))
2657 if (DECL_IN_SYSTEM_HEADER (olddecl) || DECL_IN_SYSTEM_HEADER (newdecl))
2661 else if (TREE_CODE (newdecl) == FUNCTION_DECL)
2663 /* Declarations of functions can insist on internal linkage
2664 but they can't be inconsistent with internal linkage,
2665 so there can be no error on that account.
2666 However defining the same name twice is no good. */
2667 if (DECL_INITIAL (olddecl) != 0 && DECL_INITIAL (newdecl) != 0
2668 /* However, defining once as extern inline and a second
2669 time in another way is ok. */
2670 && ! (DECL_DECLARED_INLINE_P (olddecl) && DECL_EXTERNAL (olddecl)
2671 && ! (DECL_DECLARED_INLINE_P (newdecl)
2672 && DECL_EXTERNAL (newdecl))))
2676 else if (DECL_CONTEXT (newdecl) == NULL_TREE)
2678 /* Objects declared at top level: */
2679 /* If at least one is a reference, it's ok. */
2680 if (DECL_EXTERNAL (newdecl) || DECL_EXTERNAL (olddecl))
2682 /* Reject two definitions. */
2683 if (DECL_INITIAL (olddecl) != 0 && DECL_INITIAL (newdecl) != 0)
2685 /* Now we have two tentative defs, or one tentative and one real def. */
2686 /* Insist that the linkage match. */
2687 if (TREE_PUBLIC (olddecl) != TREE_PUBLIC (newdecl))
2691 else if (current_binding_level->parm_flag
2692 && TREE_ASM_WRITTEN (olddecl) && !TREE_ASM_WRITTEN (newdecl))
2696 /* Newdecl has block scope. If olddecl has block scope also, then
2697 reject two definitions, and reject a definition together with an
2698 external reference. Otherwise, it is OK, because newdecl must
2699 be an extern reference to olddecl. */
2700 if (!(DECL_EXTERNAL (newdecl) && DECL_EXTERNAL (olddecl))
2701 && DECL_CONTEXT (newdecl) == DECL_CONTEXT (olddecl))
2707 /* Get the LABEL_DECL corresponding to identifier ID as a label.
2708 Create one if none exists so far for the current function.
2709 This function is called for both label definitions and label references. */
2715 tree decl = IDENTIFIER_LABEL_VALUE (id);
2717 if (current_function_decl == 0)
2719 error ("label %s referenced outside of any function",
2720 IDENTIFIER_POINTER (id));
2724 /* Use a label already defined or ref'd with this name. */
2727 /* But not if it is inherited and wasn't declared to be inheritable. */
2728 if (DECL_CONTEXT (decl) != current_function_decl
2729 && ! C_DECLARED_LABEL_FLAG (decl))
2730 return shadow_label (id);
2734 decl = build_decl (LABEL_DECL, id, void_type_node);
2736 /* A label not explicitly declared must be local to where it's ref'd. */
2737 DECL_CONTEXT (decl) = current_function_decl;
2739 DECL_MODE (decl) = VOIDmode;
2741 /* Say where one reference is to the label,
2742 for the sake of the error if it is not defined. */
2743 DECL_SOURCE_LINE (decl) = lineno;
2744 DECL_SOURCE_FILE (decl) = input_filename;
2746 IDENTIFIER_LABEL_VALUE (id) = decl;
2748 named_labels = tree_cons (NULL_TREE, decl, named_labels);
2753 /* Make a label named NAME in the current function,
2754 shadowing silently any that may be inherited from containing functions
2755 or containing scopes.
2757 Note that valid use, if the label being shadowed
2758 comes from another scope in the same function,
2759 requires calling declare_nonlocal_label right away. */
2765 tree decl = IDENTIFIER_LABEL_VALUE (name);
2771 /* Check to make sure that the label hasn't already been declared
2772 at this label scope */
2773 for (dup = named_labels; dup; dup = TREE_CHAIN (dup))
2774 if (TREE_VALUE (dup) == decl)
2776 error ("duplicate label declaration `%s'",
2777 IDENTIFIER_POINTER (name));
2778 error_with_decl (TREE_VALUE (dup),
2779 "this is a previous declaration");
2780 /* Just use the previous declaration. */
2781 return lookup_label (name);
2784 shadowed_labels = tree_cons (NULL_TREE, decl, shadowed_labels);
2785 IDENTIFIER_LABEL_VALUE (name) = decl = 0;
2788 return lookup_label (name);
2791 /* Define a label, specifying the location in the source file.
2792 Return the LABEL_DECL node for the label, if the definition is valid.
2793 Otherwise return 0. */
2796 define_label (filename, line, name)
2797 const char *filename;
2801 tree decl = lookup_label (name);
2803 /* If label with this name is known from an outer context, shadow it. */
2804 if (decl != 0 && DECL_CONTEXT (decl) != current_function_decl)
2806 shadowed_labels = tree_cons (NULL_TREE, decl, shadowed_labels);
2807 IDENTIFIER_LABEL_VALUE (name) = 0;
2808 decl = lookup_label (name);
2811 if (warn_traditional && !in_system_header && lookup_name (name))
2812 warning_with_file_and_line (filename, line,
2813 "traditional C lacks a separate namespace for labels, identifier `%s' conflicts",
2814 IDENTIFIER_POINTER (name));
2816 if (DECL_INITIAL (decl) != 0)
2818 error_with_file_and_line (filename, line, "duplicate label `%s'",
2819 IDENTIFIER_POINTER (name));
2824 /* Mark label as having been defined. */
2825 DECL_INITIAL (decl) = error_mark_node;
2826 /* Say where in the source. */
2827 DECL_SOURCE_FILE (decl) = filename;
2828 DECL_SOURCE_LINE (decl) = line;
2833 /* Return the list of declarations of the current level.
2834 Note that this list is in reverse order unless/until
2835 you nreverse it; and when you do nreverse it, you must
2836 store the result back using `storedecls' or you will lose. */
2841 return current_binding_level->names;
2844 /* Return the list of type-tags (for structs, etc) of the current level. */
2849 return current_binding_level->tags;
2852 /* Store the list of declarations of the current level.
2853 This is done for the parameter declarations of a function being defined,
2854 after they are modified in the light of any missing parameters. */
2860 current_binding_level->names = decls;
2863 /* Similarly, store the list of tags of the current level. */
2869 current_binding_level->tags = tags;
2872 /* Given NAME, an IDENTIFIER_NODE,
2873 return the structure (or union or enum) definition for that name.
2874 Searches binding levels from BINDING_LEVEL up to the global level.
2875 If THISLEVEL_ONLY is nonzero, searches only the specified context
2876 (but skips any tag-transparent contexts to find one that is
2877 meaningful for tags).
2878 CODE says which kind of type the caller wants;
2879 it is RECORD_TYPE or UNION_TYPE or ENUMERAL_TYPE.
2880 If the wrong kind of type is found, an error is reported. */
2883 lookup_tag (code, name, binding_level, thislevel_only)
2884 enum tree_code code;
2885 struct binding_level *binding_level;
2889 struct binding_level *level;
2892 for (level = binding_level; level; level = level->level_chain)
2895 for (tail = level->tags; tail; tail = TREE_CHAIN (tail))
2897 if (TREE_PURPOSE (tail) == name)
2899 if (TREE_CODE (TREE_VALUE (tail)) != code)
2901 /* Definition isn't the kind we were looking for. */
2902 pending_invalid_xref = name;
2903 pending_invalid_xref_file = input_filename;
2904 pending_invalid_xref_line = lineno;
2905 /* If in the same binding level as a declaration as a tag
2906 of a different type, this must not be allowed to
2907 shadow that tag, so give the error immediately.
2908 (For example, "struct foo; union foo;" is invalid.) */
2910 pending_xref_error ();
2912 return TREE_VALUE (tail);
2915 if (! level->tag_transparent)
2925 /* Print an error message now
2926 for a recent invalid struct, union or enum cross reference.
2927 We don't print them immediately because they are not invalid
2928 when used in the `struct foo;' construct for shadowing. */
2931 pending_xref_error ()
2933 if (pending_invalid_xref != 0)
2934 error_with_file_and_line (pending_invalid_xref_file,
2935 pending_invalid_xref_line,
2936 "`%s' defined as wrong kind of tag",
2937 IDENTIFIER_POINTER (pending_invalid_xref));
2938 pending_invalid_xref = 0;
2941 /* Given a type, find the tag that was defined for it and return the tag name.
2942 Otherwise return 0. */
2945 lookup_tag_reverse (type)
2948 struct binding_level *level;
2950 for (level = current_binding_level; level; level = level->level_chain)
2953 for (tail = level->tags; tail; tail = TREE_CHAIN (tail))
2955 if (TREE_VALUE (tail) == type)
2956 return TREE_PURPOSE (tail);
2962 /* Look up NAME in the current binding level and its superiors
2963 in the namespace of variables, functions and typedefs.
2964 Return a ..._DECL node of some kind representing its definition,
2965 or return 0 if it is undefined. */
2973 if (current_binding_level != global_binding_level
2974 && IDENTIFIER_LOCAL_VALUE (name))
2975 val = IDENTIFIER_LOCAL_VALUE (name);
2977 val = IDENTIFIER_GLOBAL_VALUE (name);
2981 /* Similar to `lookup_name' but look only at current binding level. */
2984 lookup_name_current_level (name)
2989 if (current_binding_level == global_binding_level)
2990 return IDENTIFIER_GLOBAL_VALUE (name);
2992 if (IDENTIFIER_LOCAL_VALUE (name) == 0)
2995 for (t = current_binding_level->names; t; t = TREE_CHAIN (t))
2996 if (DECL_NAME (t) == name)
3002 /* Mark ARG for GC. */
3005 mark_binding_level (arg)
3008 struct binding_level *level = *(struct binding_level **) arg;
3010 for (; level != 0; level = level->level_chain)
3012 ggc_mark_tree (level->names);
3013 ggc_mark_tree (level->tags);
3014 ggc_mark_tree (level->shadowed);
3015 ggc_mark_tree (level->blocks);
3016 ggc_mark_tree (level->this_block);
3017 ggc_mark_tree (level->parm_order);
3021 /* Create the predefined scalar types of C,
3022 and some nodes representing standard constants (0, 1, (void *) 0).
3023 Initialize the global binding level.
3024 Make definitions for built-in primitive functions. */
3027 init_decl_processing ()
3030 tree ptr_ftype_void, ptr_ftype_ptr;
3032 current_function_decl = NULL;
3033 named_labels = NULL;
3034 current_binding_level = NULL_BINDING_LEVEL;
3035 free_binding_level = NULL_BINDING_LEVEL;
3037 /* Make the binding_level structure for global names. */
3039 global_binding_level = current_binding_level;
3041 build_common_tree_nodes (flag_signed_char);
3043 c_common_nodes_and_builtins ();
3045 boolean_type_node = integer_type_node;
3046 boolean_true_node = integer_one_node;
3047 boolean_false_node = integer_zero_node;
3049 /* With GCC, C99's _Bool is always of size 1. */
3050 c_bool_type_node = make_unsigned_type (CHAR_TYPE_SIZE);
3051 TREE_SET_CODE (c_bool_type_node, BOOLEAN_TYPE);
3052 TYPE_MAX_VALUE (c_bool_type_node) = build_int_2 (1, 0);
3053 TREE_TYPE (TYPE_MAX_VALUE (c_bool_type_node)) = c_bool_type_node;
3054 TYPE_PRECISION (c_bool_type_node) = 1;
3055 pushdecl (build_decl (TYPE_DECL, get_identifier ("_Bool"),
3057 c_bool_false_node = build_int_2 (0, 0);
3058 TREE_TYPE (c_bool_false_node) = c_bool_type_node;
3059 c_bool_true_node = build_int_2 (1, 0);
3060 TREE_TYPE (c_bool_true_node) = c_bool_type_node;
3062 endlink = void_list_node;
3063 ptr_ftype_void = build_function_type (ptr_type_node, endlink);
3065 = build_function_type (ptr_type_node,
3066 tree_cons (NULL_TREE, ptr_type_node, endlink));
3068 /* Types which are common to the fortran compiler and libf2c. When
3069 changing these, you also need to be concerned with f/com.h. */
3071 if (TYPE_PRECISION (float_type_node)
3072 == TYPE_PRECISION (long_integer_type_node))
3074 g77_integer_type_node = long_integer_type_node;
3075 g77_uinteger_type_node = long_unsigned_type_node;
3077 else if (TYPE_PRECISION (float_type_node)
3078 == TYPE_PRECISION (integer_type_node))
3080 g77_integer_type_node = integer_type_node;
3081 g77_uinteger_type_node = unsigned_type_node;
3084 g77_integer_type_node = g77_uinteger_type_node = NULL_TREE;
3086 if (g77_integer_type_node != NULL_TREE)
3088 pushdecl (build_decl (TYPE_DECL, get_identifier ("__g77_integer"),
3089 g77_integer_type_node));
3090 pushdecl (build_decl (TYPE_DECL, get_identifier ("__g77_uinteger"),
3091 g77_uinteger_type_node));
3094 if (TYPE_PRECISION (float_type_node) * 2
3095 == TYPE_PRECISION (long_integer_type_node))
3097 g77_longint_type_node = long_integer_type_node;
3098 g77_ulongint_type_node = long_unsigned_type_node;
3100 else if (TYPE_PRECISION (float_type_node) * 2
3101 == TYPE_PRECISION (long_long_integer_type_node))
3103 g77_longint_type_node = long_long_integer_type_node;
3104 g77_ulongint_type_node = long_long_unsigned_type_node;
3107 g77_longint_type_node = g77_ulongint_type_node = NULL_TREE;
3109 if (g77_longint_type_node != NULL_TREE)
3111 pushdecl (build_decl (TYPE_DECL, get_identifier ("__g77_longint"),
3112 g77_longint_type_node));
3113 pushdecl (build_decl (TYPE_DECL, get_identifier ("__g77_ulongint"),
3114 g77_ulongint_type_node));
3117 pedantic_lvalues = pedantic;
3119 make_fname_decl = c_make_fname_decl;
3120 start_fname_decls ();
3122 incomplete_decl_finalize_hook = finish_incomplete_decl;
3124 /* Record our roots. */
3126 ggc_add_tree_root (c_global_trees, CTI_MAX);
3127 ggc_add_root (&c_stmt_tree, 1, sizeof c_stmt_tree, mark_stmt_tree);
3128 ggc_add_tree_root (&c_scope_stmt_stack, 1);
3129 ggc_add_tree_root (&named_labels, 1);
3130 ggc_add_tree_root (&shadowed_labels, 1);
3131 ggc_add_root (¤t_binding_level, 1, sizeof current_binding_level,
3132 mark_binding_level);
3133 ggc_add_root (&label_level_chain, 1, sizeof label_level_chain,
3134 mark_binding_level);
3135 ggc_add_tree_root (&static_ctors, 1);
3136 ggc_add_tree_root (&static_dtors, 1);
3139 /* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give the
3140 decl, NAME is the initialization string and TYPE_DEP indicates whether
3141 NAME depended on the type of the function. As we don't yet implement
3142 delayed emission of static data, we mark the decl as emitted
3143 so it is not placed in the output. Anything using it must therefore pull
3144 out the STRING_CST initializer directly. This does mean that these names
3145 are string merging candidates, which is wrong for C99's __func__. FIXME. */
3148 c_make_fname_decl (id, type_dep)
3152 const char *name = fname_as_string (type_dep);
3153 tree decl, type, init;
3154 size_t length = strlen (name);
3156 type = build_array_type
3157 (build_qualified_type (char_type_node, TYPE_QUAL_CONST),
3158 build_index_type (size_int (length)));
3160 decl = build_decl (VAR_DECL, id, type);
3161 /* We don't push the decl, so have to set its context here. */
3162 DECL_CONTEXT (decl) = current_function_decl;
3164 TREE_STATIC (decl) = 1;
3165 TREE_READONLY (decl) = 1;
3166 DECL_ARTIFICIAL (decl) = 1;
3168 init = build_string (length + 1, name);
3169 TREE_TYPE (init) = type;
3170 DECL_INITIAL (decl) = init;
3172 TREE_USED (decl) = 1;
3174 finish_decl (decl, init, NULL_TREE);
3179 /* Return a definition for a builtin function named NAME and whose data type
3180 is TYPE. TYPE should be a function type with argument types.
3181 FUNCTION_CODE tells later passes how to compile calls to this function.
3182 See tree.h for its possible values.
3184 If LIBRARY_NAME is nonzero, use that for DECL_ASSEMBLER_NAME,
3185 the name to be called if we can't opencode the function. */
3188 builtin_function (name, type, function_code, class, library_name)
3192 enum built_in_class class;
3193 const char *library_name;
3195 tree decl = build_decl (FUNCTION_DECL, get_identifier (name), type);
3196 DECL_EXTERNAL (decl) = 1;
3197 TREE_PUBLIC (decl) = 1;
3198 /* If -traditional, permit redefining a builtin function any way you like.
3199 (Though really, if the program redefines these functions,
3200 it probably won't work right unless compiled with -fno-builtin.) */
3201 if (flag_traditional && name[0] != '_')
3202 DECL_BUILT_IN_NONANSI (decl) = 1;
3204 SET_DECL_ASSEMBLER_NAME (decl, get_identifier (library_name));
3205 make_decl_rtl (decl, NULL);
3207 DECL_BUILT_IN_CLASS (decl) = class;
3208 DECL_FUNCTION_CODE (decl) = function_code;
3210 /* Warn if a function in the namespace for users
3211 is used without an occasion to consider it declared. */
3212 if (name[0] != '_' || name[1] != '_')
3213 C_DECL_ANTICIPATED (decl) = 1;
3215 /* Possibly apply some default attributes to this built-in function. */
3216 decl_attributes (&decl, NULL_TREE, 0);
3221 /* Apply default attributes to a function, if a system function with default
3225 insert_default_attributes (decl)
3228 if (!TREE_PUBLIC (decl))
3230 c_common_insert_default_attributes (decl);
3233 /* Called when a declaration is seen that contains no names to declare.
3234 If its type is a reference to a structure, union or enum inherited
3235 from a containing scope, shadow that tag name for the current scope
3236 with a forward reference.
3237 If its type defines a new named structure or union
3238 or defines an enum, it is valid but we need not do anything here.
3239 Otherwise, it is an error. */
3242 shadow_tag (declspecs)
3245 shadow_tag_warned (declspecs, 0);
3249 shadow_tag_warned (declspecs, warned)
3252 /* 1 => we have done a pedwarn. 2 => we have done a warning, but
3259 pending_invalid_xref = 0;
3261 /* Remove the attributes from declspecs, since they will confuse the
3263 split_specs_attrs (declspecs, &specs, &attrs);
3265 for (link = specs; link; link = TREE_CHAIN (link))
3267 tree value = TREE_VALUE (link);
3268 enum tree_code code = TREE_CODE (value);
3270 if (code == RECORD_TYPE || code == UNION_TYPE || code == ENUMERAL_TYPE)
3271 /* Used to test also that TYPE_SIZE (value) != 0.
3272 That caused warning for `struct foo;' at top level in the file. */
3274 tree name = lookup_tag_reverse (value);
3281 if (warned != 1 && code != ENUMERAL_TYPE)
3282 /* Empty unnamed enum OK */
3284 pedwarn ("unnamed struct/union that defines no instances");
3290 t = lookup_tag (code, name, current_binding_level, 1);
3294 t = make_node (code);
3301 if (!warned && ! in_system_header)
3303 warning ("useless keyword or type name in empty declaration");
3310 error ("two types specified in one empty declaration");
3315 pedwarn ("empty declaration");
3319 /* Construct an array declarator. EXPR is the expression inside [], or
3320 NULL_TREE. QUALS are the type qualifiers inside the [] (to be applied
3321 to the pointer to which a parameter array is converted). STATIC_P is
3322 non-zero if "static" is inside the [], zero otherwise. VLA_UNSPEC_P
3323 is non-zero is the array is [*], a VLA of unspecified length which is
3324 nevertheless a complete type (not currently implemented by GCC),
3325 zero otherwise. The declarator is constructed as an ARRAY_REF
3326 (to be decoded by grokdeclarator), whose operand 0 is what's on the
3327 left of the [] (filled by in set_array_declarator_type) and operand 1
3328 is the expression inside; whose TREE_TYPE is the type qualifiers and
3329 which has TREE_STATIC set if "static" is used. */
3332 build_array_declarator (expr, quals, static_p, vla_unspec_p)
3339 decl = build_nt (ARRAY_REF, NULL_TREE, expr);
3340 TREE_TYPE (decl) = quals;
3341 TREE_STATIC (decl) = (static_p ? 1 : 0);
3342 if (pedantic && !flag_isoc99)
3344 if (static_p || quals != NULL_TREE)
3345 pedwarn ("ISO C89 does not support `static' or type qualifiers in parameter array declarators");
3347 pedwarn ("ISO C89 does not support `[*]' array declarators");
3350 warning ("GCC does not yet properly implement `[*]' array declarators");
3354 /* Set the type of an array declarator. DECL is the declarator, as
3355 constructed by build_array_declarator; TYPE is what appears on the left
3356 of the [] and goes in operand 0. ABSTRACT_P is non-zero if it is an
3357 abstract declarator, zero otherwise; this is used to reject static and
3358 type qualifiers in abstract declarators, where they are not in the
3362 set_array_declarator_type (decl, type, abstract_p)
3367 TREE_OPERAND (decl, 0) = type;
3368 if (abstract_p && (TREE_TYPE (decl) != NULL_TREE || TREE_STATIC (decl)))
3369 error ("static or type qualifiers in abstract declarator");
3373 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
3376 groktypename (typename)
3379 if (TREE_CODE (typename) != TREE_LIST)
3381 return grokdeclarator (TREE_VALUE (typename),
3382 TREE_PURPOSE (typename),
3386 /* Return a PARM_DECL node for a given pair of specs and declarator. */
3389 groktypename_in_parm_context (typename)
3392 if (TREE_CODE (typename) != TREE_LIST)
3394 return grokdeclarator (TREE_VALUE (typename),
3395 TREE_PURPOSE (typename),
3399 /* Decode a declarator in an ordinary declaration or data definition.
3400 This is called as soon as the type information and variable name
3401 have been parsed, before parsing the initializer if any.
3402 Here we create the ..._DECL node, fill in its type,
3403 and put it on the list of decls for the current context.
3404 The ..._DECL node is returned as the value.
3406 Exception: for arrays where the length is not specified,
3407 the type is left null, to be filled in by `finish_decl'.
3409 Function definitions do not come here; they go to start_function
3410 instead. However, external and forward declarations of functions
3411 do go through here. Structure field declarations are done by
3412 grokfield and not through here. */
3415 start_decl (declarator, declspecs, initialized, attributes)
3416 tree declarator, declspecs;
3420 tree decl = grokdeclarator (declarator, declspecs,
3421 NORMAL, initialized);
3424 if (warn_main > 0 && TREE_CODE (decl) != FUNCTION_DECL
3425 && MAIN_NAME_P (DECL_NAME (decl)))
3426 warning_with_decl (decl, "`%s' is usually a function");
3429 /* Is it valid for this decl to have an initializer at all?
3430 If not, set INITIALIZED to zero, which will indirectly
3431 tell `finish_decl' to ignore the initializer once it is parsed. */
3432 switch (TREE_CODE (decl))
3435 /* typedef foo = bar means give foo the same type as bar.
3436 We haven't parsed bar yet, so `finish_decl' will fix that up.
3437 Any other case of an initialization in a TYPE_DECL is an error. */
3438 if (pedantic || list_length (declspecs) > 1)
3440 error ("typedef `%s' is initialized",
3441 IDENTIFIER_POINTER (DECL_NAME (decl)));
3447 error ("function `%s' is initialized like a variable",
3448 IDENTIFIER_POINTER (DECL_NAME (decl)));
3453 /* DECL_INITIAL in a PARM_DECL is really DECL_ARG_TYPE. */
3454 error ("parameter `%s' is initialized",
3455 IDENTIFIER_POINTER (DECL_NAME (decl)));
3460 /* Don't allow initializations for incomplete types
3461 except for arrays which might be completed by the initialization. */
3463 /* This can happen if the array size is an undefined macro. We already
3464 gave a warning, so we don't need another one. */
3465 if (TREE_TYPE (decl) == error_mark_node)
3467 else if (COMPLETE_TYPE_P (TREE_TYPE (decl)))
3469 /* A complete type is ok if size is fixed. */
3471 if (TREE_CODE (TYPE_SIZE (TREE_TYPE (decl))) != INTEGER_CST
3472 || C_DECL_VARIABLE_SIZE (decl))
3474 error ("variable-sized object may not be initialized");
3478 else if (TREE_CODE (TREE_TYPE (decl)) != ARRAY_TYPE)
3480 error ("variable `%s' has initializer but incomplete type",
3481 IDENTIFIER_POINTER (DECL_NAME (decl)));
3484 else if (!COMPLETE_TYPE_P (TREE_TYPE (TREE_TYPE (decl))))
3486 error ("elements of array `%s' have incomplete type",
3487 IDENTIFIER_POINTER (DECL_NAME (decl)));
3495 /* Seems redundant with grokdeclarator. */
3496 if (current_binding_level != global_binding_level
3497 && DECL_EXTERNAL (decl)
3498 && TREE_CODE (decl) != FUNCTION_DECL)
3499 warning ("declaration of `%s' has `extern' and is initialized",
3500 IDENTIFIER_POINTER (DECL_NAME (decl)));
3502 DECL_EXTERNAL (decl) = 0;
3503 if (current_binding_level == global_binding_level)
3504 TREE_STATIC (decl) = 1;
3506 /* Tell `pushdecl' this is an initialized decl
3507 even though we don't yet have the initializer expression.
3508 Also tell `finish_decl' it may store the real initializer. */
3509 DECL_INITIAL (decl) = error_mark_node;
3512 /* If this is a function declaration, write a record describing it to the
3513 prototypes file (if requested). */
3515 if (TREE_CODE (decl) == FUNCTION_DECL)
3516 gen_aux_info_record (decl, 0, 0, TYPE_ARG_TYPES (TREE_TYPE (decl)) != 0);
3518 /* ANSI specifies that a tentative definition which is not merged with
3519 a non-tentative definition behaves exactly like a definition with an
3520 initializer equal to zero. (Section 3.7.2)
3521 -fno-common gives strict ANSI behavior. Usually you don't want it.
3522 This matters only for variables with external linkage. */
3523 if (! flag_no_common || ! TREE_PUBLIC (decl))
3524 DECL_COMMON (decl) = 1;
3526 /* Set attributes here so if duplicate decl, will have proper attributes. */
3527 decl_attributes (&decl, attributes, 0);
3529 if (TREE_CODE (decl) == FUNCTION_DECL
3530 && DECL_DECLARED_INLINE_P (decl)
3531 && DECL_UNINLINABLE (decl)
3532 && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl)))
3533 warning_with_decl (decl,
3534 "inline function `%s' given attribute noinline");
3536 /* Add this decl to the current binding level.
3537 TEM may equal DECL or it may be a previous decl of the same name. */
3538 tem = pushdecl (decl);
3540 /* For a local variable, define the RTL now. */
3541 if (current_binding_level != global_binding_level
3542 /* But not if this is a duplicate decl
3543 and we preserved the rtl from the previous one
3544 (which may or may not happen). */
3545 && !DECL_RTL_SET_P (tem)
3546 && !DECL_CONTEXT (tem))
3548 if (TREE_TYPE (tem) != error_mark_node
3549 && COMPLETE_TYPE_P (TREE_TYPE (tem)))
3551 else if (TREE_CODE (TREE_TYPE (tem)) == ARRAY_TYPE
3552 && DECL_INITIAL (tem) != 0)
3559 /* Finish processing of a declaration;
3560 install its initial value.
3561 If the length of an array type is not known before,
3562 it must be determined now, from the initial value, or it is an error. */
3565 finish_decl (decl, init, asmspec_tree)
3569 tree type = TREE_TYPE (decl);
3570 int was_incomplete = (DECL_SIZE (decl) == 0);
3571 const char *asmspec = 0;
3573 /* If a name was specified, get the string. */
3575 asmspec = TREE_STRING_POINTER (asmspec_tree);
3577 /* If `start_decl' didn't like having an initialization, ignore it now. */
3578 if (init != 0 && DECL_INITIAL (decl) == 0)
3581 /* Don't crash if parm is initialized. */
3582 if (TREE_CODE (decl) == PARM_DECL)
3587 if (TREE_CODE (decl) != TYPE_DECL)
3588 store_init_value (decl, init);
3591 /* typedef foo = bar; store the type of bar as the type of foo. */
3592 TREE_TYPE (decl) = TREE_TYPE (init);
3593 DECL_INITIAL (decl) = init = 0;
3597 /* Deduce size of array from initialization, if not already known */
3598 if (TREE_CODE (type) == ARRAY_TYPE
3599 && TYPE_DOMAIN (type) == 0
3600 && TREE_CODE (decl) != TYPE_DECL)
3603 = (TREE_STATIC (decl)
3604 /* Even if pedantic, an external linkage array
3605 may have incomplete type at first. */
3606 ? pedantic && !TREE_PUBLIC (decl)
3607 : !DECL_EXTERNAL (decl));
3609 = complete_array_type (type, DECL_INITIAL (decl), do_default);
3611 /* Get the completed type made by complete_array_type. */
3612 type = TREE_TYPE (decl);
3615 error_with_decl (decl, "initializer fails to determine size of `%s'");
3617 else if (failure == 2)
3620 error_with_decl (decl, "array size missing in `%s'");
3621 /* If a `static' var's size isn't known,
3622 make it extern as well as static, so it does not get
3624 If it is not `static', then do not mark extern;
3625 finish_incomplete_decl will give it a default size
3626 and it will get allocated. */
3627 else if (!pedantic && TREE_STATIC (decl) && ! TREE_PUBLIC (decl))
3628 DECL_EXTERNAL (decl) = 1;
3631 /* TYPE_MAX_VALUE is always one less than the number of elements
3632 in the array, because we start counting at zero. Therefore,
3633 warn only if the value is less than zero. */
3634 else if (pedantic && TYPE_DOMAIN (type) != 0
3635 && tree_int_cst_sgn (TYPE_MAX_VALUE (TYPE_DOMAIN (type))) < 0)
3636 error_with_decl (decl, "zero or negative size array `%s'");
3638 layout_decl (decl, 0);
3641 if (TREE_CODE (decl) == VAR_DECL)
3643 if (DECL_SIZE (decl) == 0 && TREE_TYPE (decl) != error_mark_node
3644 && COMPLETE_TYPE_P (TREE_TYPE (decl)))
3645 layout_decl (decl, 0);
3647 if (DECL_SIZE (decl) == 0
3648 /* Don't give an error if we already gave one earlier. */
3649 && TREE_TYPE (decl) != error_mark_node
3650 && (TREE_STATIC (decl)
3652 /* A static variable with an incomplete type
3653 is an error if it is initialized.
3654 Also if it is not file scope.
3655 Otherwise, let it through, but if it is not `extern'
3656 then it may cause an error message later. */
3657 (DECL_INITIAL (decl) != 0
3658 || DECL_CONTEXT (decl) != 0)
3660 /* An automatic variable with an incomplete type
3662 !DECL_EXTERNAL (decl)))
3664 error_with_decl (decl, "storage size of `%s' isn't known");
3665 TREE_TYPE (decl) = error_mark_node;
3668 if ((DECL_EXTERNAL (decl) || TREE_STATIC (decl))
3669 && DECL_SIZE (decl) != 0)
3671 if (TREE_CODE (DECL_SIZE (decl)) == INTEGER_CST)
3672 constant_expression_warning (DECL_SIZE (decl));
3674 error_with_decl (decl, "storage size of `%s' isn't constant");
3677 if (TREE_USED (type))
3678 TREE_USED (decl) = 1;
3681 /* If this is a function and an assembler name is specified, it isn't
3682 builtin any more. Also reset DECL_RTL so we can give it its new
3684 if (TREE_CODE (decl) == FUNCTION_DECL && asmspec)
3686 DECL_BUILT_IN_CLASS (decl) = NOT_BUILT_IN;
3687 SET_DECL_RTL (decl, NULL_RTX);
3688 SET_DECL_ASSEMBLER_NAME (decl, get_identifier (asmspec));
3691 /* Output the assembler code and/or RTL code for variables and functions,
3692 unless the type is an undefined structure or union.
3693 If not, it will get done when the type is completed. */
3695 if (TREE_CODE (decl) == VAR_DECL || TREE_CODE (decl) == FUNCTION_DECL)
3697 /* This is a no-op in c-lang.c or something real in objc-actions.c. */
3698 maybe_objc_check_decl (decl);
3700 if (!DECL_CONTEXT (decl))
3702 if (DECL_INITIAL (decl) == NULL_TREE
3703 || DECL_INITIAL (decl) == error_mark_node)
3704 /* Don't output anything
3705 when a tentative file-scope definition is seen.
3706 But at end of compilation, do output code for them. */
3707 DECL_DEFER_OUTPUT (decl) = 1;
3708 rest_of_decl_compilation (decl, asmspec,
3709 (DECL_CONTEXT (decl) == 0
3710 || TREE_ASM_WRITTEN (decl)), 0);
3714 /* This is a local variable. If there is an ASMSPEC, the
3715 user has requested that we handle it specially. */
3718 /* In conjunction with an ASMSPEC, the `register'
3719 keyword indicates that we should place the variable
3720 in a particular register. */
3721 if (DECL_REGISTER (decl))
3722 DECL_C_HARD_REGISTER (decl) = 1;
3724 /* If this is not a static variable, issue a warning.
3725 It doesn't make any sense to give an ASMSPEC for an
3726 ordinary, non-register local variable. Historically,
3727 GCC has accepted -- but ignored -- the ASMSPEC in
3729 if (TREE_CODE (decl) == VAR_DECL
3730 && !DECL_REGISTER (decl)
3731 && !TREE_STATIC (decl))
3732 warning_with_decl (decl,
3733 "ignoring asm-specifier for non-static local variable `%s'");
3735 SET_DECL_ASSEMBLER_NAME (decl, get_identifier (asmspec));
3738 if (TREE_CODE (decl) != FUNCTION_DECL)
3739 add_decl_stmt (decl);
3742 if (DECL_CONTEXT (decl) != 0)
3744 /* Recompute the RTL of a local array now
3745 if it used to be an incomplete type. */
3747 && ! TREE_STATIC (decl) && ! DECL_EXTERNAL (decl))
3749 /* If we used it already as memory, it must stay in memory. */
3750 TREE_ADDRESSABLE (decl) = TREE_USED (decl);
3751 /* If it's still incomplete now, no init will save it. */
3752 if (DECL_SIZE (decl) == 0)
3753 DECL_INITIAL (decl) = 0;
3758 if (TREE_CODE (decl) == TYPE_DECL)
3760 /* This is a no-op in c-lang.c or something real in objc-actions.c. */
3761 maybe_objc_check_decl (decl);
3762 rest_of_decl_compilation (decl, NULL, DECL_CONTEXT (decl) == 0, 0);
3765 /* At the end of a declaration, throw away any variable type sizes
3766 of types defined inside that declaration. There is no use
3767 computing them in the following function definition. */
3768 if (current_binding_level == global_binding_level)
3769 get_pending_sizes ();
3772 /* If DECL has a cleanup, build and return that cleanup here.
3773 This is a callback called by expand_expr. */
3776 maybe_build_cleanup (decl)
3777 tree decl ATTRIBUTE_UNUSED;
3779 /* There are no cleanups in C. */
3783 /* Given a parsed parameter declaration,
3784 decode it into a PARM_DECL and push that on the current binding level.
3785 Also, for the sake of forward parm decls,
3786 record the given order of parms in `parm_order'. */
3789 push_parm_decl (parm)
3793 int old_immediate_size_expand = immediate_size_expand;
3794 /* Don't try computing parm sizes now -- wait till fn is called. */
3795 immediate_size_expand = 0;
3797 decl = grokdeclarator (TREE_VALUE (TREE_PURPOSE (parm)),
3798 TREE_PURPOSE (TREE_PURPOSE (parm)), PARM, 0);
3799 decl_attributes (&decl, TREE_VALUE (parm), 0);
3802 if (DECL_NAME (decl))
3805 olddecl = lookup_name (DECL_NAME (decl));
3806 if (pedantic && olddecl != 0 && TREE_CODE (olddecl) == TYPE_DECL)
3807 pedwarn_with_decl (decl,
3808 "ANSI C forbids parameter `%s' shadowing typedef");
3812 decl = pushdecl (decl);
3814 immediate_size_expand = old_immediate_size_expand;
3816 current_binding_level->parm_order
3817 = tree_cons (NULL_TREE, decl, current_binding_level->parm_order);
3819 /* Add this decl to the current binding level. */
3820 finish_decl (decl, NULL_TREE, NULL_TREE);
3823 /* Clear the given order of parms in `parm_order'.
3824 Used at start of parm list,
3825 and also at semicolon terminating forward decls. */
3830 current_binding_level->parm_order = NULL_TREE;
3833 /* Make TYPE a complete type based on INITIAL_VALUE.
3834 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
3835 2 if there was no information (in which case assume 1 if DO_DEFAULT). */
3838 complete_array_type (type, initial_value, do_default)
3843 tree maxindex = NULL_TREE;
3848 /* Note MAXINDEX is really the maximum index,
3849 one less than the size. */
3850 if (TREE_CODE (initial_value) == STRING_CST)
3853 = int_size_in_bytes (TREE_TYPE (TREE_TYPE (initial_value)));
3854 maxindex = build_int_2 ((TREE_STRING_LENGTH (initial_value)
3857 else if (TREE_CODE (initial_value) == CONSTRUCTOR)
3859 tree elts = CONSTRUCTOR_ELTS (initial_value);
3860 maxindex = build_int_2 (-1, -1);
3861 for (; elts; elts = TREE_CHAIN (elts))
3863 if (TREE_PURPOSE (elts))
3864 maxindex = TREE_PURPOSE (elts);
3866 maxindex = fold (build (PLUS_EXPR, integer_type_node,
3867 maxindex, integer_one_node));
3869 maxindex = copy_node (maxindex);
3873 /* Make an error message unless that happened already. */
3874 if (initial_value != error_mark_node)
3877 /* Prevent further error messages. */
3878 maxindex = build_int_2 (0, 0);
3885 maxindex = build_int_2 (0, 0);
3891 TYPE_DOMAIN (type) = build_index_type (maxindex);
3892 if (!TREE_TYPE (maxindex))
3893 TREE_TYPE (maxindex) = TYPE_DOMAIN (type);
3896 /* Lay out the type now that we can get the real answer. */
3903 /* Given declspecs and a declarator,
3904 determine the name and type of the object declared
3905 and construct a ..._DECL node for it.
3906 (In one case we can return a ..._TYPE node instead.
3907 For invalid input we sometimes return 0.)
3909 DECLSPECS is a chain of tree_list nodes whose value fields
3910 are the storage classes and type specifiers.
3912 DECL_CONTEXT says which syntactic context this declaration is in:
3913 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
3914 FUNCDEF for a function definition. Like NORMAL but a few different
3915 error messages in each case. Return value may be zero meaning
3916 this definition is too screwy to try to parse.
3917 PARM for a parameter declaration (either within a function prototype
3918 or before a function body). Make a PARM_DECL, or return void_type_node.
3919 TYPENAME if for a typename (in a cast or sizeof).
3920 Don't make a DECL node; just return the ..._TYPE node.
3921 FIELD for a struct or union field; make a FIELD_DECL.
3922 BITFIELD for a field with specified width.
3923 INITIALIZED is 1 if the decl has an initializer.
3925 In the TYPENAME case, DECLARATOR is really an absolute declarator.
3926 It may also be so in the PARM case, for a prototype where the
3927 argument type is specified but not the name.
3929 This function is where the complicated C meanings of `static'
3930 and `extern' are interpreted. */
3933 grokdeclarator (declarator, declspecs, decl_context, initialized)
3936 enum decl_context decl_context;
3941 tree type = NULL_TREE;
3946 int type_quals = TYPE_UNQUALIFIED;
3948 int explicit_int = 0;
3949 int explicit_char = 0;
3950 int defaulted_int = 0;
3951 tree typedef_decl = 0;
3953 tree typedef_type = 0;
3954 int funcdef_flag = 0;
3955 enum tree_code innermost_code = ERROR_MARK;
3957 int size_varies = 0;
3958 tree decl_attr = NULL_TREE;
3959 tree array_ptr_quals = NULL_TREE;
3960 int array_parm_static = 0;
3961 tree returned_attrs = NULL_TREE;
3963 if (decl_context == BITFIELD)
3964 bitfield = 1, decl_context = FIELD;
3966 if (decl_context == FUNCDEF)
3967 funcdef_flag = 1, decl_context = NORMAL;
3969 /* Look inside a declarator for the name being declared
3970 and get it as a string, for an error message. */
3972 tree decl = declarator;
3976 switch (TREE_CODE (decl))
3981 innermost_code = TREE_CODE (decl);
3982 decl = TREE_OPERAND (decl, 0);
3986 decl = TREE_VALUE (decl);
3989 case IDENTIFIER_NODE:
3990 name = IDENTIFIER_POINTER (decl);
4001 /* A function definition's declarator must have the form of
4002 a function declarator. */
4004 if (funcdef_flag && innermost_code != CALL_EXPR)
4007 /* Anything declared one level down from the top level
4008 must be one of the parameters of a function
4009 (because the body is at least two levels down). */
4011 /* If this looks like a function definition, make it one,
4012 even if it occurs where parms are expected.
4013 Then store_parm_decls will reject it and not use it as a parm. */
4014 if (decl_context == NORMAL && !funcdef_flag
4015 && current_binding_level->parm_flag)
4016 decl_context = PARM;
4018 /* Look through the decl specs and record which ones appear.
4019 Some typespecs are defined as built-in typenames.
4020 Others, the ones that are modifiers of other types,
4021 are represented by bits in SPECBITS: set the bits for
4022 the modifiers that appear. Storage class keywords are also in SPECBITS.
4024 If there is a typedef name or a type, store the type in TYPE.
4025 This includes builtin typedefs such as `int'.
4027 Set EXPLICIT_INT or EXPLICIT_CHAR if the type is `int' or `char'
4028 and did not come from a user typedef.
4030 Set LONGLONG if `long' is mentioned twice. */
4032 for (spec = declspecs; spec; spec = TREE_CHAIN (spec))
4034 tree id = TREE_VALUE (spec);
4036 if (id == ridpointers[(int) RID_INT])
4038 if (id == ridpointers[(int) RID_CHAR])
4041 if (TREE_CODE (id) == IDENTIFIER_NODE && C_IS_RESERVED_WORD (id))
4043 enum rid i = C_RID_CODE (id);
4044 if ((int) i <= (int) RID_LAST_MODIFIER)
4046 if (i == RID_LONG && (specbits & (1 << (int) i)))
4049 error ("`long long long' is too long for GCC");
4052 if (pedantic && !flag_isoc99 && ! in_system_header
4054 pedwarn ("ISO C89 does not support `long long'");
4058 else if (specbits & (1 << (int) i))
4059 pedwarn ("duplicate `%s'", IDENTIFIER_POINTER (id));
4060 specbits |= 1 << (int) i;
4065 error ("two or more data types in declaration of `%s'", name);
4066 /* Actual typedefs come to us as TYPE_DECL nodes. */
4067 else if (TREE_CODE (id) == TYPE_DECL)
4069 type = TREE_TYPE (id);
4070 decl_attr = DECL_ATTRIBUTES (id);
4073 /* Built-in types come as identifiers. */
4074 else if (TREE_CODE (id) == IDENTIFIER_NODE)
4076 tree t = lookup_name (id);
4077 if (TREE_TYPE (t) == error_mark_node)
4079 else if (!t || TREE_CODE (t) != TYPE_DECL)
4080 error ("`%s' fails to be a typedef or built in type",
4081 IDENTIFIER_POINTER (id));
4084 type = TREE_TYPE (t);
4088 else if (TREE_CODE (id) != ERROR_MARK)
4095 typedef_type = type;
4097 size_varies = C_TYPE_VARIABLE_SIZE (type);
4099 /* No type at all: default to `int', and set DEFAULTED_INT
4100 because it was not a user-defined typedef. */
4104 if ((! (specbits & ((1 << (int) RID_LONG) | (1 << (int) RID_SHORT)
4105 | (1 << (int) RID_SIGNED)
4106 | (1 << (int) RID_UNSIGNED)
4107 | (1 << (int) RID_COMPLEX))))
4108 /* Don't warn about typedef foo = bar. */
4109 && ! (specbits & (1 << (int) RID_TYPEDEF) && initialized)
4110 && ! in_system_header)
4112 /* Issue a warning if this is an ISO C 99 program or if -Wreturn-type
4113 and this is a function, or if -Wimplicit; prefer the former
4114 warning since it is more explicit. */
4115 if ((warn_implicit_int || warn_return_type || flag_isoc99)
4117 warn_about_return_type = 1;
4118 else if (warn_implicit_int || flag_isoc99)
4119 pedwarn_c99 ("type defaults to `int' in declaration of `%s'",
4124 type = integer_type_node;
4127 /* Now process the modifiers that were specified
4128 and check for invalid combinations. */
4130 /* Long double is a special combination. */
4132 if ((specbits & 1 << (int) RID_LONG) && ! longlong
4133 && TYPE_MAIN_VARIANT (type) == double_type_node)
4135 specbits &= ~(1 << (int) RID_LONG);
4136 type = long_double_type_node;
4139 /* Check all other uses of type modifiers. */
4141 if (specbits & ((1 << (int) RID_LONG) | (1 << (int) RID_SHORT)
4142 | (1 << (int) RID_UNSIGNED) | (1 << (int) RID_SIGNED)))
4146 if ((specbits & 1 << (int) RID_LONG)
4147 && (specbits & 1 << (int) RID_SHORT))
4148 error ("both long and short specified for `%s'", name);
4149 else if (((specbits & 1 << (int) RID_LONG)
4150 || (specbits & 1 << (int) RID_SHORT))
4152 error ("long or short specified with char for `%s'", name);
4153 else if (((specbits & 1 << (int) RID_LONG)
4154 || (specbits & 1 << (int) RID_SHORT))
4155 && TREE_CODE (type) == REAL_TYPE)
4157 static int already = 0;
4159 error ("long or short specified with floating type for `%s'", name);
4160 if (! already && ! pedantic)
4162 error ("the only valid combination is `long double'");
4166 else if ((specbits & 1 << (int) RID_SIGNED)
4167 && (specbits & 1 << (int) RID_UNSIGNED))
4168 error ("both signed and unsigned specified for `%s'", name);
4169 else if (TREE_CODE (type) != INTEGER_TYPE)
4170 error ("long, short, signed or unsigned invalid for `%s'", name);
4174 if (!explicit_int && !defaulted_int && !explicit_char && pedantic)
4176 pedwarn ("long, short, signed or unsigned used invalidly for `%s'",
4178 if (flag_pedantic_errors)
4183 /* Discard the type modifiers if they are invalid. */
4186 specbits &= ~((1 << (int) RID_LONG) | (1 << (int) RID_SHORT)
4187 | (1 << (int) RID_UNSIGNED) | (1 << (int) RID_SIGNED));
4192 if ((specbits & (1 << (int) RID_COMPLEX))
4193 && TREE_CODE (type) != INTEGER_TYPE && TREE_CODE (type) != REAL_TYPE)
4195 error ("complex invalid for `%s'", name);
4196 specbits &= ~(1 << (int) RID_COMPLEX);
4199 /* Decide whether an integer type is signed or not.
4200 Optionally treat bitfields as signed by default. */
4201 if (specbits & 1 << (int) RID_UNSIGNED
4202 /* Traditionally, all bitfields are unsigned. */
4203 || (bitfield && flag_traditional
4204 && (! explicit_flag_signed_bitfields || !flag_signed_bitfields))
4205 || (bitfield && ! flag_signed_bitfields
4206 && (explicit_int || defaulted_int || explicit_char
4207 /* A typedef for plain `int' without `signed'
4208 can be controlled just like plain `int'. */
4209 || ! (typedef_decl != 0
4210 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl)))
4211 && TREE_CODE (type) != ENUMERAL_TYPE
4212 && !(specbits & 1 << (int) RID_SIGNED)))
4215 type = long_long_unsigned_type_node;
4216 else if (specbits & 1 << (int) RID_LONG)
4217 type = long_unsigned_type_node;
4218 else if (specbits & 1 << (int) RID_SHORT)
4219 type = short_unsigned_type_node;
4220 else if (type == char_type_node)
4221 type = unsigned_char_type_node;
4222 else if (typedef_decl)
4223 type = unsigned_type (type);
4225 type = unsigned_type_node;
4227 else if ((specbits & 1 << (int) RID_SIGNED)
4228 && type == char_type_node)
4229 type = signed_char_type_node;
4231 type = long_long_integer_type_node;
4232 else if (specbits & 1 << (int) RID_LONG)
4233 type = long_integer_type_node;
4234 else if (specbits & 1 << (int) RID_SHORT)
4235 type = short_integer_type_node;
4237 if (specbits & 1 << (int) RID_COMPLEX)
4239 if (pedantic && !flag_isoc99)
4240 pedwarn ("ISO C89 does not support complex types");
4241 /* If we just have "complex", it is equivalent to
4242 "complex double", but if any modifiers at all are specified it is
4243 the complex form of TYPE. E.g, "complex short" is
4244 "complex short int". */
4246 if (defaulted_int && ! longlong
4247 && ! (specbits & ((1 << (int) RID_LONG) | (1 << (int) RID_SHORT)
4248 | (1 << (int) RID_SIGNED)
4249 | (1 << (int) RID_UNSIGNED))))
4252 pedwarn ("ISO C does not support plain `complex' meaning `double complex'");
4253 type = complex_double_type_node;
4255 else if (type == integer_type_node)
4258 pedwarn ("ISO C does not support complex integer types");
4259 type = complex_integer_type_node;
4261 else if (type == float_type_node)
4262 type = complex_float_type_node;
4263 else if (type == double_type_node)
4264 type = complex_double_type_node;
4265 else if (type == long_double_type_node)
4266 type = complex_long_double_type_node;
4270 pedwarn ("ISO C does not support complex integer types");
4271 type = build_complex_type (type);
4275 /* Figure out the type qualifiers for the declaration. There are
4276 two ways a declaration can become qualified. One is something
4277 like `const int i' where the `const' is explicit. Another is
4278 something like `typedef const int CI; CI i' where the type of the
4279 declaration contains the `const'. */
4280 constp = !! (specbits & 1 << (int) RID_CONST) + TYPE_READONLY (type);
4281 restrictp = !! (specbits & 1 << (int) RID_RESTRICT) + TYPE_RESTRICT (type);
4282 volatilep = !! (specbits & 1 << (int) RID_VOLATILE) + TYPE_VOLATILE (type);
4283 inlinep = !! (specbits & (1 << (int) RID_INLINE));
4284 if (constp > 1 && ! flag_isoc99)
4285 pedwarn ("duplicate `const'");
4286 if (restrictp > 1 && ! flag_isoc99)
4287 pedwarn ("duplicate `restrict'");
4288 if (volatilep > 1 && ! flag_isoc99)
4289 pedwarn ("duplicate `volatile'");
4290 if (! flag_gen_aux_info && (TYPE_QUALS (type)))
4291 type = TYPE_MAIN_VARIANT (type);
4292 type_quals = ((constp ? TYPE_QUAL_CONST : 0)
4293 | (restrictp ? TYPE_QUAL_RESTRICT : 0)
4294 | (volatilep ? TYPE_QUAL_VOLATILE : 0));
4296 /* Warn if two storage classes are given. Default to `auto'. */
4301 if (specbits & 1 << (int) RID_AUTO) nclasses++;
4302 if (specbits & 1 << (int) RID_STATIC) nclasses++;
4303 if (specbits & 1 << (int) RID_EXTERN) nclasses++;
4304 if (specbits & 1 << (int) RID_REGISTER) nclasses++;
4305 if (specbits & 1 << (int) RID_TYPEDEF) nclasses++;
4307 /* Warn about storage classes that are invalid for certain
4308 kinds of declarations (parameters, typenames, etc.). */
4311 error ("multiple storage classes in declaration of `%s'", name);
4312 else if (funcdef_flag
4314 & ((1 << (int) RID_REGISTER)
4315 | (1 << (int) RID_AUTO)
4316 | (1 << (int) RID_TYPEDEF))))
4318 if (specbits & 1 << (int) RID_AUTO
4319 && (pedantic || current_binding_level == global_binding_level))
4320 pedwarn ("function definition declared `auto'");
4321 if (specbits & 1 << (int) RID_REGISTER)
4322 error ("function definition declared `register'");
4323 if (specbits & 1 << (int) RID_TYPEDEF)
4324 error ("function definition declared `typedef'");
4325 specbits &= ~((1 << (int) RID_TYPEDEF) | (1 << (int) RID_REGISTER)
4326 | (1 << (int) RID_AUTO));
4328 else if (decl_context != NORMAL && nclasses > 0)
4330 if (decl_context == PARM && specbits & 1 << (int) RID_REGISTER)
4334 switch (decl_context)
4337 error ("storage class specified for structure field `%s'",
4341 error ("storage class specified for parameter `%s'", name);
4344 error ("storage class specified for typename");
4347 specbits &= ~((1 << (int) RID_TYPEDEF) | (1 << (int) RID_REGISTER)
4348 | (1 << (int) RID_AUTO) | (1 << (int) RID_STATIC)
4349 | (1 << (int) RID_EXTERN));
4352 else if (specbits & 1 << (int) RID_EXTERN && initialized && ! funcdef_flag)
4354 /* `extern' with initialization is invalid if not at top level. */
4355 if (current_binding_level == global_binding_level)
4356 warning ("`%s' initialized and declared `extern'", name);
4358 error ("`%s' has both `extern' and initializer", name);
4360 else if (specbits & 1 << (int) RID_EXTERN && funcdef_flag
4361 && current_binding_level != global_binding_level)
4362 error ("nested function `%s' declared `extern'", name);
4363 else if (current_binding_level == global_binding_level
4364 && specbits & (1 << (int) RID_AUTO))
4365 error ("top-level declaration of `%s' specifies `auto'", name);
4368 /* Now figure out the structure of the declarator proper.
4369 Descend through it, creating more complex types, until we reach
4370 the declared identifier (or NULL_TREE, in an absolute declarator). */
4372 while (declarator && TREE_CODE (declarator) != IDENTIFIER_NODE)
4374 if (type == error_mark_node)
4376 declarator = TREE_OPERAND (declarator, 0);
4380 /* Each level of DECLARATOR is either an ARRAY_REF (for ...[..]),
4381 an INDIRECT_REF (for *...),
4382 a CALL_EXPR (for ...(...)),
4383 a TREE_LIST (for nested attributes),
4384 an identifier (for the name being declared)
4385 or a null pointer (for the place in an absolute declarator
4386 where the name was omitted).
4387 For the last two cases, we have just exited the loop.
4389 At this point, TYPE is the type of elements of an array,
4390 or for a function to return, or for a pointer to point to.
4391 After this sequence of ifs, TYPE is the type of the
4392 array or function or pointer, and DECLARATOR has had its
4393 outermost layer removed. */
4395 if (array_ptr_quals != NULL_TREE || array_parm_static)
4397 /* Only the innermost declarator (making a parameter be of
4398 array type which is converted to pointer type)
4399 may have static or type qualifiers. */
4400 error ("static or type qualifiers in non-parameter array declarator");
4401 array_ptr_quals = NULL_TREE;
4402 array_parm_static = 0;
4405 if (TREE_CODE (declarator) == TREE_LIST)
4407 /* We encode a declarator with embedded attributes using
4409 tree attrs = TREE_PURPOSE (declarator);
4412 declarator = TREE_VALUE (declarator);
4413 inner_decl = declarator;
4414 while (inner_decl != NULL_TREE
4415 && TREE_CODE (inner_decl) == TREE_LIST)
4416 inner_decl = TREE_VALUE (inner_decl);
4417 if (inner_decl == NULL_TREE
4418 || TREE_CODE (inner_decl) == IDENTIFIER_NODE)
4419 attr_flags |= (int) ATTR_FLAG_DECL_NEXT;
4420 if (TREE_CODE (inner_decl) == CALL_EXPR)
4421 attr_flags |= (int) ATTR_FLAG_FUNCTION_NEXT;
4422 if (TREE_CODE (inner_decl) == ARRAY_REF)
4423 attr_flags |= (int) ATTR_FLAG_ARRAY_NEXT;
4424 returned_attrs = decl_attributes (&type,
4425 chainon (returned_attrs, attrs),
4428 else if (TREE_CODE (declarator) == ARRAY_REF)
4430 tree itype = NULL_TREE;
4431 tree size = TREE_OPERAND (declarator, 1);
4432 /* The index is a signed object `sizetype' bits wide. */
4433 tree index_type = signed_type (sizetype);
4435 array_ptr_quals = TREE_TYPE (declarator);
4436 array_parm_static = TREE_STATIC (declarator);
4438 declarator = TREE_OPERAND (declarator, 0);
4440 /* Check for some types that there cannot be arrays of. */
4442 if (VOID_TYPE_P (type))
4444 error ("declaration of `%s' as array of voids", name);
4445 type = error_mark_node;
4448 if (TREE_CODE (type) == FUNCTION_TYPE)
4450 error ("declaration of `%s' as array of functions", name);
4451 type = error_mark_node;
4454 if (size == error_mark_node)
4455 type = error_mark_node;
4457 if (type == error_mark_node)
4460 /* If size was specified, set ITYPE to a range-type for that size.
4461 Otherwise, ITYPE remains null. finish_decl may figure it out
4462 from an initial value. */
4466 /* Strip NON_LVALUE_EXPRs since we aren't using as an lvalue. */
4467 STRIP_TYPE_NOPS (size);
4469 if (! INTEGRAL_TYPE_P (TREE_TYPE (size)))
4471 error ("size of array `%s' has non-integer type", name);
4472 size = integer_one_node;
4475 if (pedantic && integer_zerop (size))
4476 pedwarn ("ISO C forbids zero-size array `%s'", name);
4478 if (TREE_CODE (size) == INTEGER_CST)
4480 constant_expression_warning (size);
4481 if (tree_int_cst_sgn (size) < 0)
4483 error ("size of array `%s' is negative", name);
4484 size = integer_one_node;
4489 /* Make sure the array size remains visibly nonconstant
4490 even if it is (eg) a const variable with known value. */
4495 if (TREE_CONSTANT (size))
4496 pedwarn ("ISO C89 forbids array `%s' whose size can't be evaluated",
4499 pedwarn ("ISO C89 forbids variable-size array `%s'",
4504 if (integer_zerop (size))
4506 /* A zero-length array cannot be represented with an
4507 unsigned index type, which is what we'll get with
4508 build_index_type. Create an open-ended range instead. */
4509 itype = build_range_type (sizetype, size, NULL_TREE);
4513 /* Compute the maximum valid index, that is, size - 1.
4514 Do the calculation in index_type, so that if it is
4515 a variable the computations will be done in the
4517 itype = fold (build (MINUS_EXPR, index_type,
4518 convert (index_type, size),
4519 convert (index_type, size_one_node)));
4521 /* If that overflowed, the array is too big.
4522 ??? While a size of INT_MAX+1 technically shouldn't
4523 cause an overflow (because we subtract 1), the overflow
4524 is recorded during the conversion to index_type, before
4525 the subtraction. Handling this case seems like an
4526 unnecessary complication. */
4527 if (TREE_OVERFLOW (itype))
4529 error ("size of array `%s' is too large", name);
4530 type = error_mark_node;
4535 itype = variable_size (itype);
4536 itype = build_index_type (itype);
4539 else if (decl_context == FIELD)
4541 /* ??? Need to check somewhere that this is a structure
4542 and not a union, that this field is last, and that
4543 this structure has at least one other named member. */
4545 if (pedantic && !flag_isoc99 && !in_system_header)
4546 pedwarn ("ISO C89 does not support flexible array members");
4548 /* ISO C99 Flexible array members are effectively identical
4549 to GCC's zero-length array extension. */
4550 itype = build_range_type (sizetype, size_zero_node, NULL_TREE);
4553 /* If pedantic, complain about arrays of incomplete types. */
4555 if (pedantic && !COMPLETE_TYPE_P (type))
4556 pedwarn ("array type has incomplete element type");
4559 /* We shouldn't have a function type here at all!
4560 Functions aren't allowed as array elements. */
4561 if (pedantic && TREE_CODE (type) == FUNCTION_TYPE
4562 && (constp || volatilep))
4563 pedwarn ("ANSI C forbids const or volatile function types");
4566 /* Build the array type itself, then merge any constancy or
4567 volatility into the target type. We must do it in this order
4568 to ensure that the TYPE_MAIN_VARIANT field of the array type
4569 is set correctly. */
4571 type = build_array_type (type, itype);
4573 type = c_build_qualified_type (type, type_quals);
4576 C_TYPE_VARIABLE_SIZE (type) = 1;
4578 /* The GCC extension for zero-length arrays differs from
4579 ISO flexible array members in that sizeof yields zero. */
4580 if (size && integer_zerop (size))
4583 TYPE_SIZE (type) = bitsize_zero_node;
4584 TYPE_SIZE_UNIT (type) = size_zero_node;
4586 if (decl_context != PARM
4587 && (array_ptr_quals != NULL_TREE || array_parm_static))
4589 error ("static or type qualifiers in non-parameter array declarator");
4590 array_ptr_quals = NULL_TREE;
4591 array_parm_static = 0;
4594 else if (TREE_CODE (declarator) == CALL_EXPR)
4598 /* Declaring a function type.
4599 Make sure we have a valid type for the function to return. */
4600 if (type == error_mark_node)
4605 /* Warn about some types functions can't return. */
4607 if (TREE_CODE (type) == FUNCTION_TYPE)
4609 error ("`%s' declared as function returning a function", name);
4610 type = integer_type_node;
4612 if (TREE_CODE (type) == ARRAY_TYPE)
4614 error ("`%s' declared as function returning an array", name);
4615 type = integer_type_node;
4618 #ifndef TRADITIONAL_RETURN_FLOAT
4619 /* Traditionally, declaring return type float means double. */
4621 if (flag_traditional && TYPE_MAIN_VARIANT (type) == float_type_node)
4622 type = double_type_node;
4623 #endif /* TRADITIONAL_RETURN_FLOAT */
4625 /* Construct the function type and go to the next
4626 inner layer of declarator. */
4628 arg_types = grokparms (TREE_OPERAND (declarator, 1),
4630 /* Say it's a definition
4631 only for the CALL_EXPR
4632 closest to the identifier. */
4633 && TREE_CODE (TREE_OPERAND (declarator, 0)) == IDENTIFIER_NODE);
4634 /* Type qualifiers before the return type of the function
4635 qualify the return type, not the function type. */
4638 /* Type qualifiers on a function return type are normally
4639 permitted by the standard but have no effect, so give a
4640 warning at -W. Qualifiers on a void return type have
4641 meaning as a GNU extension, and are banned on function
4642 definitions in ISO C. FIXME: strictly we shouldn't
4643 pedwarn for qualified void return types except on function
4644 definitions, but not doing so could lead to the undesirable
4645 state of a "volatile void" function return type not being
4646 warned about, and a use of the function being compiled
4647 with GNU semantics, with no diagnostics under -pedantic. */
4648 if (VOID_TYPE_P (type) && pedantic && !in_system_header)
4649 pedwarn ("ISO C forbids qualified void function return type");
4650 else if (extra_warnings
4651 && !(VOID_TYPE_P (type)
4652 && type_quals == TYPE_QUAL_VOLATILE))
4653 warning ("type qualifiers ignored on function return type");
4655 type = c_build_qualified_type (type, type_quals);
4657 type_quals = TYPE_UNQUALIFIED;
4659 type = build_function_type (type, arg_types);
4660 declarator = TREE_OPERAND (declarator, 0);
4662 /* Set the TYPE_CONTEXTs for each tagged type which is local to
4663 the formal parameter list of this FUNCTION_TYPE to point to
4664 the FUNCTION_TYPE node itself. */
4669 for (link = last_function_parm_tags;
4671 link = TREE_CHAIN (link))
4672 TYPE_CONTEXT (TREE_VALUE (link)) = type;
4675 else if (TREE_CODE (declarator) == INDIRECT_REF)
4677 /* Merge any constancy or volatility into the target type
4680 if (pedantic && TREE_CODE (type) == FUNCTION_TYPE
4682 pedwarn ("ISO C forbids qualified function types");
4684 type = c_build_qualified_type (type, type_quals);
4685 type_quals = TYPE_UNQUALIFIED;
4688 type = build_pointer_type (type);
4690 /* Process a list of type modifier keywords
4691 (such as const or volatile) that were given inside the `*'. */
4693 if (TREE_TYPE (declarator))
4701 for (typemodlist = TREE_TYPE (declarator); typemodlist;
4702 typemodlist = TREE_CHAIN (typemodlist))
4704 tree qualifier = TREE_VALUE (typemodlist);
4706 if (C_IS_RESERVED_WORD (qualifier))
4708 if (C_RID_CODE (qualifier) == RID_CONST)
4710 else if (C_RID_CODE (qualifier) == RID_VOLATILE)
4712 else if (C_RID_CODE (qualifier) == RID_RESTRICT)
4722 error ("invalid type modifier within pointer declarator");
4723 if (constp > 1 && ! flag_isoc99)
4724 pedwarn ("duplicate `const'");
4725 if (volatilep > 1 && ! flag_isoc99)
4726 pedwarn ("duplicate `volatile'");
4727 if (restrictp > 1 && ! flag_isoc99)
4728 pedwarn ("duplicate `restrict'");
4730 type_quals = ((constp ? TYPE_QUAL_CONST : 0)
4731 | (restrictp ? TYPE_QUAL_RESTRICT : 0)
4732 | (volatilep ? TYPE_QUAL_VOLATILE : 0));
4735 declarator = TREE_OPERAND (declarator, 0);
4742 /* Now TYPE has the actual type. */
4744 /* Did array size calculations overflow? */
4746 if (TREE_CODE (type) == ARRAY_TYPE
4747 && COMPLETE_TYPE_P (type)
4748 && TREE_OVERFLOW (TYPE_SIZE (type)))
4750 error ("size of array `%s' is too large", name);
4751 /* If we proceed with the array type as it is, we'll eventually
4752 crash in tree_low_cst(). */
4753 type = error_mark_node;
4756 /* If this is declaring a typedef name, return a TYPE_DECL. */
4758 if (specbits & (1 << (int) RID_TYPEDEF))
4761 /* Note that the grammar rejects storage classes
4762 in typenames, fields or parameters */
4763 if (pedantic && TREE_CODE (type) == FUNCTION_TYPE
4765 pedwarn ("ISO C forbids qualified function types");
4767 type = c_build_qualified_type (type, type_quals);
4768 decl = build_decl (TYPE_DECL, declarator, type);
4769 if ((specbits & (1 << (int) RID_SIGNED))
4770 || (typedef_decl && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl)))
4771 C_TYPEDEF_EXPLICITLY_SIGNED (decl) = 1;
4772 decl_attributes (&decl, returned_attrs, 0);
4776 /* Detect the case of an array type of unspecified size
4777 which came, as such, direct from a typedef name.
4778 We must copy the type, so that each identifier gets
4779 a distinct type, so that each identifier's size can be
4780 controlled separately by its own initializer. */
4782 if (type != 0 && typedef_type != 0
4783 && TREE_CODE (type) == ARRAY_TYPE && TYPE_DOMAIN (type) == 0
4784 && TYPE_MAIN_VARIANT (type) == TYPE_MAIN_VARIANT (typedef_type))
4786 type = build_array_type (TREE_TYPE (type), 0);
4788 C_TYPE_VARIABLE_SIZE (type) = 1;
4791 /* If this is a type name (such as, in a cast or sizeof),
4792 compute the type and return it now. */
4794 if (decl_context == TYPENAME)
4796 /* Note that the grammar rejects storage classes
4797 in typenames, fields or parameters */
4798 if (pedantic && TREE_CODE (type) == FUNCTION_TYPE
4800 pedwarn ("ISO C forbids const or volatile function types");
4802 type = c_build_qualified_type (type, type_quals);
4803 decl_attributes (&type, returned_attrs, 0);
4807 /* Aside from typedefs and type names (handle above),
4808 `void' at top level (not within pointer)
4809 is allowed only in public variables.
4810 We don't complain about parms either, but that is because
4811 a better error message can be made later. */
4813 if (VOID_TYPE_P (type) && decl_context != PARM
4814 && ! ((decl_context != FIELD && TREE_CODE (type) != FUNCTION_TYPE)
4815 && ((specbits & (1 << (int) RID_EXTERN))
4816 || (current_binding_level == global_binding_level
4818 & ((1 << (int) RID_STATIC) | (1 << (int) RID_REGISTER)))))))
4820 error ("variable or field `%s' declared void", name);
4821 type = integer_type_node;
4824 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
4825 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
4830 if (decl_context == PARM)
4832 tree type_as_written;
4835 /* A parameter declared as an array of T is really a pointer to T.
4836 One declared as a function is really a pointer to a function. */
4838 if (TREE_CODE (type) == ARRAY_TYPE)
4840 /* Transfer const-ness of array into that of type pointed to. */
4841 type = TREE_TYPE (type);
4843 type = c_build_qualified_type (type, type_quals);
4844 type = build_pointer_type (type);
4845 type_quals = TYPE_UNQUALIFIED;
4846 if (array_ptr_quals)
4848 tree new_ptr_quals, new_ptr_attrs;
4850 split_specs_attrs (array_ptr_quals, &new_ptr_quals, &new_ptr_attrs);
4851 /* We don't yet implement attributes in this context. */
4852 if (new_ptr_attrs != NULL_TREE)
4853 warning ("attributes in parameter array declarator ignored");
4858 for (; new_ptr_quals; new_ptr_quals = TREE_CHAIN (new_ptr_quals))
4860 tree qualifier = TREE_VALUE (new_ptr_quals);
4862 if (C_IS_RESERVED_WORD (qualifier))
4864 if (C_RID_CODE (qualifier) == RID_CONST)
4866 else if (C_RID_CODE (qualifier) == RID_VOLATILE)
4868 else if (C_RID_CODE (qualifier) == RID_RESTRICT)
4878 error ("invalid type modifier within array declarator");
4880 type_quals = ((constp ? TYPE_QUAL_CONST : 0)
4881 | (restrictp ? TYPE_QUAL_RESTRICT : 0)
4882 | (volatilep ? TYPE_QUAL_VOLATILE : 0));
4886 else if (TREE_CODE (type) == FUNCTION_TYPE)
4888 if (pedantic && type_quals)
4889 pedwarn ("ISO C forbids qualified function types");
4891 type = c_build_qualified_type (type, type_quals);
4892 type = build_pointer_type (type);
4893 type_quals = TYPE_UNQUALIFIED;
4895 else if (type_quals)
4896 type = c_build_qualified_type (type, type_quals);
4898 type_as_written = type;
4900 decl = build_decl (PARM_DECL, declarator, type);
4902 C_DECL_VARIABLE_SIZE (decl) = 1;
4904 /* Compute the type actually passed in the parmlist,
4905 for the case where there is no prototype.
4906 (For example, shorts and chars are passed as ints.)
4907 When there is a prototype, this is overridden later. */
4909 if (type == error_mark_node)
4910 promoted_type = type;
4913 promoted_type = simple_type_promotes_to (type);
4914 if (! promoted_type)
4915 promoted_type = type;
4918 DECL_ARG_TYPE (decl) = promoted_type;
4919 DECL_ARG_TYPE_AS_WRITTEN (decl) = type_as_written;
4921 else if (decl_context == FIELD)
4923 /* Structure field. It may not be a function. */
4925 if (TREE_CODE (type) == FUNCTION_TYPE)
4927 error ("field `%s' declared as a function", name);
4928 type = build_pointer_type (type);
4930 else if (TREE_CODE (type) != ERROR_MARK
4931 && !COMPLETE_OR_UNBOUND_ARRAY_TYPE_P (type))
4933 error ("field `%s' has incomplete type", name);
4934 type = error_mark_node;
4936 /* Move type qualifiers down to element of an array. */
4937 if (TREE_CODE (type) == ARRAY_TYPE && type_quals)
4939 type = build_array_type (c_build_qualified_type (TREE_TYPE (type),
4941 TYPE_DOMAIN (type));
4943 /* Leave the field const or volatile as well. */
4944 type_quals = TYPE_UNQUALIFIED;
4947 decl = build_decl (FIELD_DECL, declarator, type);
4948 DECL_NONADDRESSABLE_P (decl) = bitfield;
4951 C_DECL_VARIABLE_SIZE (decl) = 1;
4953 else if (TREE_CODE (type) == FUNCTION_TYPE)
4955 /* Every function declaration is "external"
4956 except for those which are inside a function body
4957 in which `auto' is used.
4958 That is a case not specified by ANSI C,
4959 and we use it for forward declarations for nested functions. */
4960 int extern_ref = (!(specbits & (1 << (int) RID_AUTO))
4961 || current_binding_level == global_binding_level);
4963 if (specbits & (1 << (int) RID_AUTO)
4964 && (pedantic || current_binding_level == global_binding_level))
4965 pedwarn ("invalid storage class for function `%s'", name);
4966 if (specbits & (1 << (int) RID_REGISTER))
4967 error ("invalid storage class for function `%s'", name);
4968 /* Function declaration not at top level.
4969 Storage classes other than `extern' are not allowed
4970 and `extern' makes no difference. */
4971 if (current_binding_level != global_binding_level
4972 && (specbits & ((1 << (int) RID_STATIC) | (1 << (int) RID_INLINE)))
4974 pedwarn ("invalid storage class for function `%s'", name);
4976 decl = build_decl (FUNCTION_DECL, declarator, type);
4977 decl = build_decl_attribute_variant (decl, decl_attr);
4979 DECL_LANG_SPECIFIC (decl) = (struct lang_decl *)
4980 ggc_alloc_cleared (sizeof (struct lang_decl));
4982 if (pedantic && type_quals && ! DECL_IN_SYSTEM_HEADER (decl))
4983 pedwarn ("ISO C forbids qualified function types");
4985 /* GNU C interprets a `volatile void' return type to indicate
4986 that the function does not return. */
4987 if ((type_quals & TYPE_QUAL_VOLATILE)
4988 && !VOID_TYPE_P (TREE_TYPE (TREE_TYPE (decl))))
4989 warning ("`noreturn' function returns non-void value");
4992 DECL_EXTERNAL (decl) = 1;
4993 /* Record absence of global scope for `static' or `auto'. */
4995 = !(specbits & ((1 << (int) RID_STATIC) | (1 << (int) RID_AUTO)));
4997 /* Record presence of `inline', if it is reasonable. */
4998 if (MAIN_NAME_P (declarator))
5001 warning ("cannot inline function `main'");
5005 /* Assume that otherwise the function can be inlined. */
5006 DECL_INLINE (decl) = 1;
5007 DECL_DECLARED_INLINE_P (decl) = 1;
5009 if (specbits & (1 << (int) RID_EXTERN))
5010 current_extern_inline = 1;
5012 /* If -finline-functions, assume it can be inlined. This does
5013 two things: let the function be deferred until it is actually
5014 needed, and let dwarf2 know that the function is inlinable. */
5015 else if (flag_inline_trees == 2)
5017 DECL_INLINE (decl) = 1;
5018 DECL_DECLARED_INLINE_P (decl) = 0;
5023 /* It's a variable. */
5024 /* An uninitialized decl with `extern' is a reference. */
5025 int extern_ref = !initialized && (specbits & (1 << (int) RID_EXTERN));
5027 /* Move type qualifiers down to element of an array. */
5028 if (TREE_CODE (type) == ARRAY_TYPE && type_quals)
5030 int saved_align = TYPE_ALIGN(type);
5031 type = build_array_type (c_build_qualified_type (TREE_TYPE (type),
5033 TYPE_DOMAIN (type));
5034 TYPE_ALIGN (type) = saved_align;
5035 #if 0 /* Leave the variable const or volatile as well. */
5036 type_quals = TYPE_UNQUALIFIED;
5039 else if (type_quals)
5040 type = c_build_qualified_type (type, type_quals);
5042 decl = build_decl (VAR_DECL, declarator, type);
5044 C_DECL_VARIABLE_SIZE (decl) = 1;
5047 pedwarn_with_decl (decl, "variable `%s' declared `inline'");
5049 DECL_EXTERNAL (decl) = extern_ref;
5050 /* At top level, the presence of a `static' or `register' storage
5051 class specifier, or the absence of all storage class specifiers
5052 makes this declaration a definition (perhaps tentative). Also,
5053 the absence of both `static' and `register' makes it public. */
5054 if (current_binding_level == global_binding_level)
5058 & ((1 << (int) RID_STATIC) | (1 << (int) RID_REGISTER)));
5059 TREE_STATIC (decl) = ! DECL_EXTERNAL (decl);
5061 /* Not at top level, only `static' makes a static definition. */
5064 TREE_STATIC (decl) = (specbits & (1 << (int) RID_STATIC)) != 0;
5065 TREE_PUBLIC (decl) = DECL_EXTERNAL (decl);
5069 /* Record `register' declaration for warnings on &
5070 and in case doing stupid register allocation. */
5072 if (specbits & (1 << (int) RID_REGISTER))
5073 DECL_REGISTER (decl) = 1;
5075 /* Record constancy and volatility. */
5076 c_apply_type_quals_to_decl (type_quals, decl);
5078 /* If a type has volatile components, it should be stored in memory.
5079 Otherwise, the fact that those components are volatile
5080 will be ignored, and would even crash the compiler. */
5081 if (C_TYPE_FIELDS_VOLATILE (TREE_TYPE (decl)))
5082 mark_addressable (decl);
5084 decl_attributes (&decl, returned_attrs, 0);
5090 /* Decode the parameter-list info for a function type or function definition.
5091 The argument is the value returned by `get_parm_info' (or made in parse.y
5092 if there is an identifier list instead of a parameter decl list).
5093 These two functions are separate because when a function returns
5094 or receives functions then each is called multiple times but the order
5095 of calls is different. The last call to `grokparms' is always the one
5096 that contains the formal parameter names of a function definition.
5098 Store in `last_function_parms' a chain of the decls of parms.
5099 Also store in `last_function_parm_tags' a chain of the struct, union,
5100 and enum tags declared among the parms.
5102 Return a list of arg types to use in the FUNCTION_TYPE for this function.
5104 FUNCDEF_FLAG is nonzero for a function definition, 0 for
5105 a mere declaration. A nonempty identifier-list gets an error message
5106 when FUNCDEF_FLAG is zero. */
5109 grokparms (parms_info, funcdef_flag)
5113 tree first_parm = TREE_CHAIN (parms_info);
5115 last_function_parms = TREE_PURPOSE (parms_info);
5116 last_function_parm_tags = TREE_VALUE (parms_info);
5118 if (warn_strict_prototypes && first_parm == 0 && !funcdef_flag
5119 && !in_system_header)
5120 warning ("function declaration isn't a prototype");
5123 && TREE_CODE (TREE_VALUE (first_parm)) == IDENTIFIER_NODE)
5126 pedwarn ("parameter names (without types) in function declaration");
5128 last_function_parms = first_parm;
5135 /* We no longer test FUNCDEF_FLAG.
5136 If the arg types are incomplete in a declaration,
5137 they must include undefined tags.
5138 These tags can never be defined in the scope of the declaration,
5139 so the types can never be completed,
5140 and no call can be compiled successfully. */
5142 /* In a fcn definition, arg types must be complete. */
5145 for (parm = last_function_parms, typelt = first_parm;
5147 parm = TREE_CHAIN (parm))
5148 /* Skip over any enumeration constants declared here. */
5149 if (TREE_CODE (parm) == PARM_DECL)
5151 /* Barf if the parameter itself has an incomplete type. */
5152 tree type = TREE_VALUE (typelt);
5153 if (type == error_mark_node)
5155 if (!COMPLETE_TYPE_P (type))
5157 if (funcdef_flag && DECL_NAME (parm) != 0)
5158 error ("parameter `%s' has incomplete type",
5159 IDENTIFIER_POINTER (DECL_NAME (parm)));
5161 warning ("parameter has incomplete type");
5164 TREE_VALUE (typelt) = error_mark_node;
5165 TREE_TYPE (parm) = error_mark_node;
5169 /* This has been replaced by parm_tags_warning, which
5170 uses a more accurate criterion for what to warn
5174 /* Now warn if is a pointer to an incomplete type. */
5175 while (TREE_CODE (type) == POINTER_TYPE
5176 || TREE_CODE (type) == REFERENCE_TYPE)
5177 type = TREE_TYPE (type);
5178 type = TYPE_MAIN_VARIANT (type);
5179 if (!COMPLETE_TYPE_P (type))
5181 if (DECL_NAME (parm) != 0)
5182 warning ("parameter `%s' points to incomplete type",
5183 IDENTIFIER_POINTER (DECL_NAME (parm)));
5185 warning ("parameter points to incomplete type");
5189 typelt = TREE_CHAIN (typelt);
5196 /* Return a tree_list node with info on a parameter list just parsed.
5197 The TREE_PURPOSE is a chain of decls of those parms.
5198 The TREE_VALUE is a list of structure, union and enum tags defined.
5199 The TREE_CHAIN is a list of argument types to go in the FUNCTION_TYPE.
5200 This tree_list node is later fed to `grokparms'.
5202 VOID_AT_END nonzero means append `void' to the end of the type-list.
5203 Zero means the parmlist ended with an ellipsis so don't append `void'. */
5206 get_parm_info (void_at_end)
5212 tree tags = gettags ();
5213 tree parms = getdecls ();
5215 tree order = current_binding_level->parm_order;
5217 /* Just `void' (and no ellipsis) is special. There are really no parms.
5218 But if the `void' is qualified (by `const' or `volatile') or has a
5219 storage class specifier (`register'), then the behavior is undefined;
5220 by not counting it as the special case of `void' we will cause an
5221 error later. Typedefs for `void' are OK (see DR#157). */
5222 if (void_at_end && parms != 0
5223 && TREE_CHAIN (parms) == 0
5224 && VOID_TYPE_P (TREE_TYPE (parms))
5225 && ! TREE_THIS_VOLATILE (parms)
5226 && ! TREE_READONLY (parms)
5227 && ! DECL_REGISTER (parms)
5228 && DECL_NAME (parms) == 0)
5231 storedecls (NULL_TREE);
5232 return tree_cons (NULL_TREE, NULL_TREE,
5233 tree_cons (NULL_TREE, void_type_node, NULL_TREE));
5236 /* Extract enumerator values and other non-parms declared with the parms.
5237 Likewise any forward parm decls that didn't have real parm decls. */
5238 for (decl = parms; decl;)
5240 tree next = TREE_CHAIN (decl);
5242 if (TREE_CODE (decl) != PARM_DECL)
5244 TREE_CHAIN (decl) = new_parms;
5247 else if (TREE_ASM_WRITTEN (decl))
5249 error_with_decl (decl,
5250 "parameter `%s' has just a forward declaration");
5251 TREE_CHAIN (decl) = new_parms;
5257 /* Put the parm decls back in the order they were in in the parm list. */
5258 for (t = order; t; t = TREE_CHAIN (t))
5261 TREE_CHAIN (TREE_VALUE (t)) = TREE_VALUE (TREE_CHAIN (t));
5263 TREE_CHAIN (TREE_VALUE (t)) = 0;
5266 new_parms = chainon (order ? nreverse (TREE_VALUE (order)) : 0,
5269 /* Store the parmlist in the binding level since the old one
5270 is no longer a valid list. (We have changed the chain pointers.) */
5271 storedecls (new_parms);
5273 for (decl = new_parms; decl; decl = TREE_CHAIN (decl))
5274 /* There may also be declarations for enumerators if an enumeration
5275 type is declared among the parms. Ignore them here. */
5276 if (TREE_CODE (decl) == PARM_DECL)
5278 /* Since there is a prototype,
5279 args are passed in their declared types. */
5280 tree type = TREE_TYPE (decl);
5281 DECL_ARG_TYPE (decl) = type;
5282 if (PROMOTE_PROTOTYPES
5283 && INTEGRAL_TYPE_P (type)
5284 && TYPE_PRECISION (type) < TYPE_PRECISION (integer_type_node))
5285 DECL_ARG_TYPE (decl) = integer_type_node;
5287 types = tree_cons (NULL_TREE, TREE_TYPE (decl), types);
5288 if (VOID_TYPE_P (TREE_VALUE (types)) && ! erred
5289 && DECL_NAME (decl) == 0)
5291 error ("`void' in parameter list must be the entire list");
5297 return tree_cons (new_parms, tags,
5298 nreverse (tree_cons (NULL_TREE, void_type_node, types)));
5300 return tree_cons (new_parms, tags, nreverse (types));
5303 /* At end of parameter list, warn about any struct, union or enum tags
5304 defined within. Do so because these types cannot ever become complete. */
5307 parmlist_tags_warning ()
5312 for (elt = current_binding_level->tags; elt; elt = TREE_CHAIN (elt))
5314 enum tree_code code = TREE_CODE (TREE_VALUE (elt));
5315 /* An anonymous union parm type is meaningful as a GNU extension.
5316 So don't warn for that. */
5317 if (code == UNION_TYPE && TREE_PURPOSE (elt) == 0 && !pedantic)
5319 if (TREE_PURPOSE (elt) != 0)
5321 if (code == RECORD_TYPE)
5322 warning ("`struct %s' declared inside parameter list",
5323 IDENTIFIER_POINTER (TREE_PURPOSE (elt)));
5324 else if (code == UNION_TYPE)
5325 warning ("`union %s' declared inside parameter list",
5326 IDENTIFIER_POINTER (TREE_PURPOSE (elt)));
5328 warning ("`enum %s' declared inside parameter list",
5329 IDENTIFIER_POINTER (TREE_PURPOSE (elt)));
5333 /* For translation these need to be separate warnings */
5334 if (code == RECORD_TYPE)
5335 warning ("anonymous struct declared inside parameter list");
5336 else if (code == UNION_TYPE)
5337 warning ("anonymous union declared inside parameter list");
5339 warning ("anonymous enum declared inside parameter list");
5343 warning ("its scope is only this definition or declaration, which is probably not what you want.");
5349 /* Get the struct, enum or union (CODE says which) with tag NAME.
5350 Define the tag as a forward-reference if it is not defined. */
5353 xref_tag (code, name)
5354 enum tree_code code;
5357 /* If a cross reference is requested, look up the type
5358 already defined for this tag and return it. */
5360 tree ref = lookup_tag (code, name, current_binding_level, 0);
5361 /* If this is the right type of tag, return what we found.
5362 (This reference will be shadowed by shadow_tag later if appropriate.)
5363 If this is the wrong type of tag, do not return it. If it was the
5364 wrong type in the same binding level, we will have had an error
5365 message already; if in a different binding level and declaring
5366 a name, pending_xref_error will give an error message; but if in a
5367 different binding level and not declaring a name, this tag should
5368 shadow the previous declaration of a different type of tag, and
5369 this would not work properly if we return the reference found.
5370 (For example, with "struct foo" in an outer scope, "union foo;"
5371 must shadow that tag with a new one of union type.) */
5372 if (ref && TREE_CODE (ref) == code)
5375 /* If no such tag is yet defined, create a forward-reference node
5376 and record it as the "definition".
5377 When a real declaration of this type is found,
5378 the forward-reference will be altered into a real type. */
5380 ref = make_node (code);
5381 if (code == ENUMERAL_TYPE)
5383 /* Give the type a default layout like unsigned int
5384 to avoid crashing if it does not get defined. */
5385 TYPE_MODE (ref) = TYPE_MODE (unsigned_type_node);
5386 TYPE_ALIGN (ref) = TYPE_ALIGN (unsigned_type_node);
5387 TYPE_USER_ALIGN (ref) = 0;
5388 TREE_UNSIGNED (ref) = 1;
5389 TYPE_PRECISION (ref) = TYPE_PRECISION (unsigned_type_node);
5390 TYPE_MIN_VALUE (ref) = TYPE_MIN_VALUE (unsigned_type_node);
5391 TYPE_MAX_VALUE (ref) = TYPE_MAX_VALUE (unsigned_type_node);
5394 pushtag (name, ref);
5399 /* Make sure that the tag NAME is defined *in the current binding level*
5400 at least as a forward reference.
5401 CODE says which kind of tag NAME ought to be. */
5404 start_struct (code, name)
5405 enum tree_code code;
5408 /* If there is already a tag defined at this binding level
5409 (as a forward reference), just return it. */
5414 ref = lookup_tag (code, name, current_binding_level, 1);
5415 if (ref && TREE_CODE (ref) == code)
5417 C_TYPE_BEING_DEFINED (ref) = 1;
5418 TYPE_PACKED (ref) = flag_pack_struct;
5419 if (TYPE_FIELDS (ref))
5421 if (code == UNION_TYPE)
5422 error ("redefinition of `union %s'",
5423 IDENTIFIER_POINTER (name));
5425 error ("redefinition of `struct %s'",
5426 IDENTIFIER_POINTER (name));
5432 /* Otherwise create a forward-reference just so the tag is in scope. */
5434 ref = make_node (code);
5435 pushtag (name, ref);
5436 C_TYPE_BEING_DEFINED (ref) = 1;
5437 TYPE_PACKED (ref) = flag_pack_struct;
5441 /* Process the specs, declarator (NULL if omitted) and width (NULL if omitted)
5442 of a structure component, returning a FIELD_DECL node.
5443 WIDTH is non-NULL for bit fields only, and is an INTEGER_CST node.
5445 This is done during the parsing of the struct declaration.
5446 The FIELD_DECL nodes are chained together and the lot of them
5447 are ultimately passed to `build_struct' to make the RECORD_TYPE node. */
5450 grokfield (filename, line, declarator, declspecs, width)
5451 const char *filename ATTRIBUTE_UNUSED;
5452 int line ATTRIBUTE_UNUSED;
5453 tree declarator, declspecs, width;
5457 if (declarator == NULL_TREE && width == NULL_TREE)
5459 /* This is an unnamed decl. We only support unnamed
5460 structs/unions, so check for other things and refuse them. */
5461 if (TREE_CODE (TREE_VALUE (declspecs)) != RECORD_TYPE
5462 && TREE_CODE (TREE_VALUE (declspecs)) != UNION_TYPE)
5464 error ("unnamed fields of type other than struct or union are not allowed");
5469 value = grokdeclarator (declarator, declspecs, width ? BITFIELD : FIELD, 0);
5471 finish_decl (value, NULL_TREE, NULL_TREE);
5472 DECL_INITIAL (value) = width;
5474 maybe_objc_check_decl (value);
5478 /* Fill in the fields of a RECORD_TYPE or UNION_TYPE node, T.
5479 FIELDLIST is a chain of FIELD_DECL nodes for the fields.
5480 ATTRIBUTES are attributes to be applied to the structure. */
5483 finish_struct (t, fieldlist, attributes)
5489 int toplevel = global_binding_level == current_binding_level;
5490 int saw_named_field;
5492 /* If this type was previously laid out as a forward reference,
5493 make sure we lay it out again. */
5497 decl_attributes (&t, attributes, (int) ATTR_FLAG_TYPE_IN_PLACE);
5499 /* Nameless union parm types are useful as GCC extension. */
5500 if (! (TREE_CODE (t) == UNION_TYPE && TYPE_NAME (t) == 0) && !pedantic)
5501 /* Otherwise, warn about any struct or union def. in parmlist. */
5502 if (in_parm_level_p ())
5505 pedwarn ("%s defined inside parms",
5506 TREE_CODE (t) == UNION_TYPE ? _("union") : _("structure"));
5507 else if (! flag_traditional)
5508 warning ("%s defined inside parms",
5509 TREE_CODE (t) == UNION_TYPE ? _("union") : _("structure"));
5514 for (x = fieldlist; x; x = TREE_CHAIN (x))
5515 if (DECL_NAME (x) != 0)
5519 pedwarn ("%s has no %s",
5520 TREE_CODE (t) == UNION_TYPE ? _("union") : _("struct"),
5521 fieldlist ? _("named members") : _("members"));
5524 /* Install struct as DECL_CONTEXT of each field decl.
5525 Also process specified field sizes,m which is found in the DECL_INITIAL.
5526 Store 0 there, except for ": 0" fields (so we can find them
5527 and delete them, below). */
5529 saw_named_field = 0;
5530 for (x = fieldlist; x; x = TREE_CHAIN (x))
5532 DECL_CONTEXT (x) = t;
5533 DECL_PACKED (x) |= TYPE_PACKED (t);
5535 /* If any field is const, the structure type is pseudo-const. */
5536 if (TREE_READONLY (x))
5537 C_TYPE_FIELDS_READONLY (t) = 1;
5540 /* A field that is pseudo-const makes the structure likewise. */
5541 tree t1 = TREE_TYPE (x);
5542 while (TREE_CODE (t1) == ARRAY_TYPE)
5543 t1 = TREE_TYPE (t1);
5544 if ((TREE_CODE (t1) == RECORD_TYPE || TREE_CODE (t1) == UNION_TYPE)
5545 && C_TYPE_FIELDS_READONLY (t1))
5546 C_TYPE_FIELDS_READONLY (t) = 1;
5549 /* Any field that is volatile means variables of this type must be
5550 treated in some ways as volatile. */
5551 if (TREE_THIS_VOLATILE (x))
5552 C_TYPE_FIELDS_VOLATILE (t) = 1;
5554 /* Any field of nominal variable size implies structure is too. */
5555 if (C_DECL_VARIABLE_SIZE (x))
5556 C_TYPE_VARIABLE_SIZE (t) = 1;
5558 /* Detect invalid nested redefinition. */
5559 if (TREE_TYPE (x) == t)
5560 error ("nested redefinition of `%s'",
5561 IDENTIFIER_POINTER (TYPE_NAME (t)));
5563 /* Detect invalid bit-field size. */
5564 if (DECL_INITIAL (x))
5565 STRIP_NOPS (DECL_INITIAL (x));
5566 if (DECL_INITIAL (x))
5568 if (TREE_CODE (DECL_INITIAL (x)) == INTEGER_CST)
5569 constant_expression_warning (DECL_INITIAL (x));
5573 "bit-field `%s' width not an integer constant");
5574 DECL_INITIAL (x) = NULL;
5578 /* Detect invalid bit-field type. */
5579 if (DECL_INITIAL (x)
5580 && TREE_CODE (TREE_TYPE (x)) != INTEGER_TYPE
5581 && TREE_CODE (TREE_TYPE (x)) != BOOLEAN_TYPE
5582 && TREE_CODE (TREE_TYPE (x)) != ENUMERAL_TYPE)
5584 error_with_decl (x, "bit-field `%s' has invalid type");
5585 DECL_INITIAL (x) = NULL;
5588 if (DECL_INITIAL (x) && pedantic
5589 && TYPE_MAIN_VARIANT (TREE_TYPE (x)) != integer_type_node
5590 && TYPE_MAIN_VARIANT (TREE_TYPE (x)) != unsigned_type_node
5591 && TYPE_MAIN_VARIANT (TREE_TYPE (x)) != c_bool_type_node
5592 /* Accept an enum that's equivalent to int or unsigned int. */
5593 && !(TREE_CODE (TREE_TYPE (x)) == ENUMERAL_TYPE
5594 && (TYPE_PRECISION (TREE_TYPE (x))
5595 == TYPE_PRECISION (integer_type_node))))
5596 pedwarn_with_decl (x, "bit-field `%s' type invalid in ISO C");
5598 /* Detect and ignore out of range field width and process valid
5600 if (DECL_INITIAL (x))
5603 if (TYPE_MAIN_VARIANT (TREE_TYPE (x)) == c_bool_type_node)
5604 max_width = CHAR_TYPE_SIZE;
5606 max_width = TYPE_PRECISION (TREE_TYPE (x));
5607 if (tree_int_cst_sgn (DECL_INITIAL (x)) < 0)
5608 error_with_decl (x, "negative width in bit-field `%s'");
5609 else if (0 < compare_tree_int (DECL_INITIAL (x), max_width))
5610 pedwarn_with_decl (x, "width of `%s' exceeds its type");
5611 else if (integer_zerop (DECL_INITIAL (x)) && DECL_NAME (x) != 0)
5612 error_with_decl (x, "zero width for bit-field `%s'");
5615 /* The test above has assured us that TREE_INT_CST_HIGH is 0. */
5616 unsigned HOST_WIDE_INT width
5617 = TREE_INT_CST_LOW (DECL_INITIAL (x));
5619 if (TREE_CODE (TREE_TYPE (x)) == ENUMERAL_TYPE
5620 && (width < min_precision (TYPE_MIN_VALUE (TREE_TYPE (x)),
5621 TREE_UNSIGNED (TREE_TYPE (x)))
5623 < min_precision (TYPE_MAX_VALUE (TREE_TYPE (x)),
5624 TREE_UNSIGNED (TREE_TYPE (x))))))
5625 warning_with_decl (x,
5626 "`%s' is narrower than values of its type");
5628 DECL_SIZE (x) = bitsize_int (width);
5629 DECL_BIT_FIELD (x) = 1;
5630 SET_DECL_C_BIT_FIELD (x);
5634 /* field size 0 => force desired amount of alignment. */
5635 #ifdef EMPTY_FIELD_BOUNDARY
5636 DECL_ALIGN (x) = MAX (DECL_ALIGN (x), EMPTY_FIELD_BOUNDARY);
5638 #ifdef PCC_BITFIELD_TYPE_MATTERS
5639 if (PCC_BITFIELD_TYPE_MATTERS)
5641 DECL_ALIGN (x) = MAX (DECL_ALIGN (x),
5642 TYPE_ALIGN (TREE_TYPE (x)));
5643 DECL_USER_ALIGN (x) |= TYPE_USER_ALIGN (TREE_TYPE (x));
5650 else if (TREE_TYPE (x) != error_mark_node)
5652 unsigned int min_align = (DECL_PACKED (x) ? BITS_PER_UNIT
5653 : TYPE_ALIGN (TREE_TYPE (x)));
5655 /* Non-bit-fields are aligned for their type, except packed
5656 fields which require only BITS_PER_UNIT alignment. */
5657 DECL_ALIGN (x) = MAX (DECL_ALIGN (x), min_align);
5658 if (! DECL_PACKED (x))
5659 DECL_USER_ALIGN (x) |= TYPE_USER_ALIGN (TREE_TYPE (x));
5662 DECL_INITIAL (x) = 0;
5664 /* Detect flexible array member in an invalid context. */
5665 if (TREE_CODE (TREE_TYPE (x)) == ARRAY_TYPE
5666 && TYPE_SIZE (TREE_TYPE (x)) == NULL_TREE
5667 && TYPE_DOMAIN (TREE_TYPE (x)) != NULL_TREE
5668 && TYPE_MAX_VALUE (TYPE_DOMAIN (TREE_TYPE (x))) == NULL_TREE)
5670 if (TREE_CODE (t) == UNION_TYPE)
5671 error_with_decl (x, "flexible array member in union");
5672 else if (TREE_CHAIN (x) != NULL_TREE)
5673 error_with_decl (x, "flexible array member not at end of struct");
5674 else if (! saw_named_field)
5675 error_with_decl (x, "flexible array member in otherwise empty struct");
5678 saw_named_field = 1;
5681 /* Delete all duplicate fields from the fieldlist */
5682 for (x = fieldlist; x && TREE_CHAIN (x);)
5683 /* Anonymous fields aren't duplicates. */
5684 if (DECL_NAME (TREE_CHAIN (x)) == 0)
5692 if (DECL_NAME (y) == DECL_NAME (TREE_CHAIN (x)))
5698 if (DECL_NAME (y) == DECL_NAME (TREE_CHAIN (x)))
5700 error_with_decl (TREE_CHAIN (x), "duplicate member `%s'");
5701 TREE_CHAIN (x) = TREE_CHAIN (TREE_CHAIN (x));
5707 /* Now we have the nearly final fieldlist. Record it,
5708 then lay out the structure or union (including the fields). */
5710 TYPE_FIELDS (t) = fieldlist;
5714 /* Delete all zero-width bit-fields from the fieldlist */
5716 tree *fieldlistp = &fieldlist;
5718 if (TREE_CODE (*fieldlistp) == FIELD_DECL && DECL_INITIAL (*fieldlistp))
5719 *fieldlistp = TREE_CHAIN (*fieldlistp);
5721 fieldlistp = &TREE_CHAIN (*fieldlistp);
5724 /* Now we have the truly final field list.
5725 Store it in this type and in the variants. */
5727 TYPE_FIELDS (t) = fieldlist;
5729 for (x = TYPE_MAIN_VARIANT (t); x; x = TYPE_NEXT_VARIANT (x))
5731 TYPE_FIELDS (x) = TYPE_FIELDS (t);
5732 TYPE_LANG_SPECIFIC (x) = TYPE_LANG_SPECIFIC (t);
5733 TYPE_ALIGN (x) = TYPE_ALIGN (t);
5734 TYPE_USER_ALIGN (x) = TYPE_USER_ALIGN (t);
5737 /* If this was supposed to be a transparent union, but we can't
5738 make it one, warn and turn off the flag. */
5739 if (TREE_CODE (t) == UNION_TYPE
5740 && TYPE_TRANSPARENT_UNION (t)
5741 && TYPE_MODE (t) != DECL_MODE (TYPE_FIELDS (t)))
5743 TYPE_TRANSPARENT_UNION (t) = 0;
5744 warning ("union cannot be made transparent");
5747 /* If this structure or union completes the type of any previous
5748 variable declaration, lay it out and output its rtl. */
5750 if (current_binding_level->n_incomplete != 0)
5753 for (decl = current_binding_level->names; decl; decl = TREE_CHAIN (decl))
5755 if (TYPE_MAIN_VARIANT (TREE_TYPE (decl)) == TYPE_MAIN_VARIANT (t)
5756 && TREE_CODE (decl) != TYPE_DECL)
5758 layout_decl (decl, 0);
5759 /* This is a no-op in c-lang.c or something real in objc-actions.c. */
5760 maybe_objc_check_decl (decl);
5761 rest_of_decl_compilation (decl, NULL, toplevel, 0);
5764 --current_binding_level->n_incomplete;
5766 else if (!COMPLETE_TYPE_P (TREE_TYPE (decl))
5767 && TREE_CODE (TREE_TYPE (decl)) == ARRAY_TYPE)
5769 tree element = TREE_TYPE (decl);
5770 while (TREE_CODE (element) == ARRAY_TYPE)
5771 element = TREE_TYPE (element);
5773 layout_array_type (TREE_TYPE (decl));
5778 /* Finish debugging output for this type. */
5779 rest_of_type_compilation (t, toplevel);
5784 /* Lay out the type T, and its element type, and so on. */
5787 layout_array_type (t)
5790 if (TREE_CODE (TREE_TYPE (t)) == ARRAY_TYPE)
5791 layout_array_type (TREE_TYPE (t));
5795 /* Begin compiling the definition of an enumeration type.
5796 NAME is its name (or null if anonymous).
5797 Returns the type object, as yet incomplete.
5798 Also records info about it so that build_enumerator
5799 may be used to declare the individual values as they are read. */
5807 /* If this is the real definition for a previous forward reference,
5808 fill in the contents in the same object that used to be the
5809 forward reference. */
5812 enumtype = lookup_tag (ENUMERAL_TYPE, name, current_binding_level, 1);
5814 if (enumtype == 0 || TREE_CODE (enumtype) != ENUMERAL_TYPE)
5816 enumtype = make_node (ENUMERAL_TYPE);
5817 pushtag (name, enumtype);
5820 C_TYPE_BEING_DEFINED (enumtype) = 1;
5822 if (TYPE_VALUES (enumtype) != 0)
5824 /* This enum is a named one that has been declared already. */
5825 error ("redeclaration of `enum %s'", IDENTIFIER_POINTER (name));
5827 /* Completely replace its old definition.
5828 The old enumerators remain defined, however. */
5829 TYPE_VALUES (enumtype) = 0;
5832 enum_next_value = integer_zero_node;
5835 if (flag_short_enums)
5836 TYPE_PACKED (enumtype) = 1;
5841 /* After processing and defining all the values of an enumeration type,
5842 install their decls in the enumeration type and finish it off.
5843 ENUMTYPE is the type object, VALUES a list of decl-value pairs,
5844 and ATTRIBUTES are the specified attributes.
5845 Returns ENUMTYPE. */
5848 finish_enum (enumtype, values, attributes)
5854 tree minnode = 0, maxnode = 0, enum_value_type;
5855 int precision, unsign;
5856 int toplevel = (global_binding_level == current_binding_level);
5858 if (in_parm_level_p ())
5859 warning ("enum defined inside parms");
5861 decl_attributes (&enumtype, attributes, (int) ATTR_FLAG_TYPE_IN_PLACE);
5863 /* Calculate the maximum value of any enumerator in this type. */
5865 if (values == error_mark_node)
5866 minnode = maxnode = integer_zero_node;
5869 minnode = maxnode = TREE_VALUE (values);
5870 for (pair = TREE_CHAIN (values); pair; pair = TREE_CHAIN (pair))
5872 tree value = TREE_VALUE (pair);
5873 if (tree_int_cst_lt (maxnode, value))
5875 if (tree_int_cst_lt (value, minnode))
5880 /* Construct the final type of this enumeration. It is the same
5881 as one of the integral types - the narrowest one that fits, except
5882 that normally we only go as narrow as int - and signed iff any of
5883 the values are negative. */
5884 unsign = (tree_int_cst_sgn (minnode) >= 0);
5885 precision = MAX (min_precision (minnode, unsign),
5886 min_precision (maxnode, unsign));
5887 if (TYPE_PACKED (enumtype) || precision > TYPE_PRECISION (integer_type_node))
5889 tree narrowest = type_for_size (precision, unsign);
5892 warning ("enumeration values exceed range of largest integer");
5893 narrowest = long_long_integer_type_node;
5896 precision = TYPE_PRECISION (narrowest);
5899 precision = TYPE_PRECISION (integer_type_node);
5901 if (precision == TYPE_PRECISION (integer_type_node))
5902 enum_value_type = type_for_size (precision, 0);
5904 enum_value_type = enumtype;
5906 TYPE_MIN_VALUE (enumtype) = minnode;
5907 TYPE_MAX_VALUE (enumtype) = maxnode;
5908 TYPE_PRECISION (enumtype) = precision;
5909 TREE_UNSIGNED (enumtype) = unsign;
5910 TYPE_SIZE (enumtype) = 0;
5911 layout_type (enumtype);
5913 if (values != error_mark_node)
5915 /* Change the type of the enumerators to be the enum type. We
5916 need to do this irrespective of the size of the enum, for
5917 proper type checking. Replace the DECL_INITIALs of the
5918 enumerators, and the value slots of the list, with copies
5919 that have the enum type; they cannot be modified in place
5920 because they may be shared (e.g. integer_zero_node) Finally,
5921 change the purpose slots to point to the names of the decls. */
5922 for (pair = values; pair; pair = TREE_CHAIN (pair))
5924 tree enu = TREE_PURPOSE (pair);
5926 TREE_TYPE (enu) = enumtype;
5927 DECL_SIZE (enu) = TYPE_SIZE (enumtype);
5928 DECL_SIZE_UNIT (enu) = TYPE_SIZE_UNIT (enumtype);
5929 DECL_ALIGN (enu) = TYPE_ALIGN (enumtype);
5930 DECL_USER_ALIGN (enu) = TYPE_USER_ALIGN (enumtype);
5931 DECL_MODE (enu) = TYPE_MODE (enumtype);
5933 /* The ISO C Standard mandates enumerators to have type int,
5934 even though the underlying type of an enum type is
5935 unspecified. Here we convert any enumerators that fit in
5936 an int to type int, to avoid promotions to unsigned types
5937 when comparing integers with enumerators that fit in the
5938 int range. When -pedantic is given, build_enumerator()
5939 would have already taken care of those that don't fit. */
5940 if (int_fits_type_p (DECL_INITIAL (enu), enum_value_type))
5941 DECL_INITIAL (enu) = convert (enum_value_type, DECL_INITIAL (enu));
5943 DECL_INITIAL (enu) = convert (enumtype, DECL_INITIAL (enu));
5945 TREE_PURPOSE (pair) = DECL_NAME (enu);
5946 TREE_VALUE (pair) = DECL_INITIAL (enu);
5949 TYPE_VALUES (enumtype) = values;
5952 /* Fix up all variant types of this enum type. */
5953 for (tem = TYPE_MAIN_VARIANT (enumtype); tem; tem = TYPE_NEXT_VARIANT (tem))
5955 if (tem == enumtype)
5957 TYPE_VALUES (tem) = TYPE_VALUES (enumtype);
5958 TYPE_MIN_VALUE (tem) = TYPE_MIN_VALUE (enumtype);
5959 TYPE_MAX_VALUE (tem) = TYPE_MAX_VALUE (enumtype);
5960 TYPE_SIZE (tem) = TYPE_SIZE (enumtype);
5961 TYPE_SIZE_UNIT (tem) = TYPE_SIZE_UNIT (enumtype);
5962 TYPE_MODE (tem) = TYPE_MODE (enumtype);
5963 TYPE_PRECISION (tem) = TYPE_PRECISION (enumtype);
5964 TYPE_ALIGN (tem) = TYPE_ALIGN (enumtype);
5965 TYPE_USER_ALIGN (tem) = TYPE_USER_ALIGN (enumtype);
5966 TREE_UNSIGNED (tem) = TREE_UNSIGNED (enumtype);
5969 /* Finish debugging output for this type. */
5970 rest_of_type_compilation (enumtype, toplevel);
5975 /* Build and install a CONST_DECL for one value of the
5976 current enumeration type (one that was begun with start_enum).
5977 Return a tree-list containing the CONST_DECL and its value.
5978 Assignment of sequential values by default is handled here. */
5981 build_enumerator (name, value)
5986 /* Validate and default VALUE. */
5988 /* Remove no-op casts from the value. */
5990 STRIP_TYPE_NOPS (value);
5994 if (TREE_CODE (value) == INTEGER_CST)
5996 value = default_conversion (value);
5997 constant_expression_warning (value);
6001 error ("enumerator value for `%s' not integer constant",
6002 IDENTIFIER_POINTER (name));
6007 /* Default based on previous value. */
6008 /* It should no longer be possible to have NON_LVALUE_EXPR
6012 value = enum_next_value;
6014 error ("overflow in enumeration values");
6017 if (pedantic && ! int_fits_type_p (value, integer_type_node))
6019 pedwarn ("ISO C restricts enumerator values to range of `int'");
6020 value = convert (integer_type_node, value);
6023 /* Set basis for default for next value. */
6024 enum_next_value = build_binary_op (PLUS_EXPR, value, integer_one_node, 0);
6025 enum_overflow = tree_int_cst_lt (enum_next_value, value);
6027 /* Now create a declaration for the enum value name. */
6029 type = TREE_TYPE (value);
6030 type = type_for_size (MAX (TYPE_PRECISION (type),
6031 TYPE_PRECISION (integer_type_node)),
6033 || TYPE_PRECISION (type) >= TYPE_PRECISION (integer_type_node))
6034 && TREE_UNSIGNED (type)));
6036 decl = build_decl (CONST_DECL, name, type);
6037 DECL_INITIAL (decl) = convert (type, value);
6040 return tree_cons (decl, value, NULL_TREE);
6044 /* Create the FUNCTION_DECL for a function definition.
6045 DECLSPECS, DECLARATOR and ATTRIBUTES are the parts of
6046 the declaration; they describe the function's name and the type it returns,
6047 but twisted together in a fashion that parallels the syntax of C.
6049 This function creates a binding context for the function body
6050 as well as setting up the FUNCTION_DECL in current_function_decl.
6052 Returns 1 on success. If the DECLARATOR is not suitable for a function
6053 (it defines a datum instead), we return 0, which tells
6054 yyparse to report a parse error. */
6057 start_function (declspecs, declarator, attributes)
6058 tree declarator, declspecs, attributes;
6060 tree decl1, old_decl;
6062 int old_immediate_size_expand = immediate_size_expand;
6064 current_function_returns_value = 0; /* Assume, until we see it does. */
6065 current_function_returns_null = 0;
6066 warn_about_return_type = 0;
6067 current_extern_inline = 0;
6068 c_function_varargs = 0;
6070 shadowed_labels = 0;
6072 /* Don't expand any sizes in the return type of the function. */
6073 immediate_size_expand = 0;
6075 decl1 = grokdeclarator (declarator, declspecs, FUNCDEF, 1);
6077 /* If the declarator is not suitable for a function definition,
6078 cause a syntax error. */
6081 immediate_size_expand = old_immediate_size_expand;
6085 decl_attributes (&decl1, attributes, 0);
6087 if (DECL_DECLARED_INLINE_P (decl1)
6088 && DECL_UNINLINABLE (decl1)
6089 && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl1)))
6090 warning_with_decl (decl1,
6091 "inline function `%s' given attribute noinline");
6093 announce_function (decl1);
6095 if (!COMPLETE_OR_VOID_TYPE_P (TREE_TYPE (TREE_TYPE (decl1))))
6097 error ("return type is an incomplete type");
6098 /* Make it return void instead. */
6100 = build_function_type (void_type_node,
6101 TYPE_ARG_TYPES (TREE_TYPE (decl1)));
6104 if (warn_about_return_type)
6105 pedwarn_c99 ("return type defaults to `int'");
6107 /* Save the parm names or decls from this function's declarator
6108 where store_parm_decls will find them. */
6109 current_function_parms = last_function_parms;
6110 current_function_parm_tags = last_function_parm_tags;
6112 /* Make the init_value nonzero so pushdecl knows this is not tentative.
6113 error_mark_node is replaced below (in poplevel) with the BLOCK. */
6114 DECL_INITIAL (decl1) = error_mark_node;
6116 /* If this definition isn't a prototype and we had a prototype declaration
6117 before, copy the arg type info from that prototype.
6118 But not if what we had before was a builtin function. */
6119 old_decl = lookup_name_current_level (DECL_NAME (decl1));
6120 if (old_decl != 0 && TREE_CODE (TREE_TYPE (old_decl)) == FUNCTION_TYPE
6121 && !DECL_BUILT_IN (old_decl)
6122 && (TYPE_MAIN_VARIANT (TREE_TYPE (TREE_TYPE (decl1)))
6123 == TYPE_MAIN_VARIANT (TREE_TYPE (TREE_TYPE (old_decl))))
6124 && TYPE_ARG_TYPES (TREE_TYPE (decl1)) == 0)
6126 TREE_TYPE (decl1) = TREE_TYPE (old_decl);
6127 current_function_prototype_file = DECL_SOURCE_FILE (old_decl);
6128 current_function_prototype_line = DECL_SOURCE_LINE (old_decl);
6131 /* If there is no explicit declaration, look for any out-of-scope implicit
6134 old_decl = IDENTIFIER_IMPLICIT_DECL (DECL_NAME (decl1));
6136 /* Optionally warn of old-fashioned def with no previous prototype. */
6137 if (warn_strict_prototypes
6138 && TYPE_ARG_TYPES (TREE_TYPE (decl1)) == 0
6140 && (TYPE_ARG_TYPES (TREE_TYPE (old_decl)) != 0
6141 || (DECL_BUILT_IN (old_decl)
6142 && ! C_DECL_ANTICIPATED (old_decl)))))
6143 warning ("function declaration isn't a prototype");
6144 /* Optionally warn of any global def with no previous prototype. */
6145 else if (warn_missing_prototypes
6146 && TREE_PUBLIC (decl1)
6148 && (TYPE_ARG_TYPES (TREE_TYPE (old_decl)) != 0
6149 || (DECL_BUILT_IN (old_decl)
6150 && ! C_DECL_ANTICIPATED (old_decl))))
6151 && ! MAIN_NAME_P (DECL_NAME (decl1)))
6152 warning_with_decl (decl1, "no previous prototype for `%s'");
6153 /* Optionally warn of any def with no previous prototype
6154 if the function has already been used. */
6155 else if (warn_missing_prototypes
6156 && old_decl != 0 && TREE_USED (old_decl)
6157 && TYPE_ARG_TYPES (TREE_TYPE (old_decl)) == 0)
6158 warning_with_decl (decl1,
6159 "`%s' was used with no prototype before its definition");
6160 /* Optionally warn of any global def with no previous declaration. */
6161 else if (warn_missing_declarations
6162 && TREE_PUBLIC (decl1)
6164 && ! MAIN_NAME_P (DECL_NAME (decl1)))
6165 warning_with_decl (decl1, "no previous declaration for `%s'");
6166 /* Optionally warn of any def with no previous declaration
6167 if the function has already been used. */
6168 else if (warn_missing_declarations
6169 && old_decl != 0 && TREE_USED (old_decl)
6170 && old_decl == IDENTIFIER_IMPLICIT_DECL (DECL_NAME (decl1)))
6171 warning_with_decl (decl1,
6172 "`%s' was used with no declaration before its definition");
6174 /* This is a definition, not a reference.
6175 So normally clear DECL_EXTERNAL.
6176 However, `extern inline' acts like a declaration
6177 except for defining how to inline. So set DECL_EXTERNAL in that case. */
6178 DECL_EXTERNAL (decl1) = current_extern_inline;
6180 /* This function exists in static storage.
6181 (This does not mean `static' in the C sense!) */
6182 TREE_STATIC (decl1) = 1;
6184 /* A nested function is not global. */
6185 if (current_function_decl != 0)
6186 TREE_PUBLIC (decl1) = 0;
6188 /* Warn for unlikely, improbable, or stupid declarations of `main'. */
6189 if (warn_main > 0 && MAIN_NAME_P (DECL_NAME (decl1)))
6194 if (TYPE_MAIN_VARIANT (TREE_TYPE (TREE_TYPE (decl1)))
6195 != integer_type_node)
6196 pedwarn_with_decl (decl1, "return type of `%s' is not `int'");
6198 for (args = TYPE_ARG_TYPES (TREE_TYPE (decl1)); args;
6199 args = TREE_CHAIN (args))
6201 tree type = args ? TREE_VALUE (args) : 0;
6203 if (type == void_type_node)
6210 if (TYPE_MAIN_VARIANT (type) != integer_type_node)
6211 pedwarn_with_decl (decl1,
6212 "first argument of `%s' should be `int'");
6216 if (TREE_CODE (type) != POINTER_TYPE
6217 || TREE_CODE (TREE_TYPE (type)) != POINTER_TYPE
6218 || (TYPE_MAIN_VARIANT (TREE_TYPE (TREE_TYPE (type)))
6220 pedwarn_with_decl (decl1,
6221 "second argument of `%s' should be `char **'");
6225 if (TREE_CODE (type) != POINTER_TYPE
6226 || TREE_CODE (TREE_TYPE (type)) != POINTER_TYPE
6227 || (TYPE_MAIN_VARIANT (TREE_TYPE (TREE_TYPE (type)))
6229 pedwarn_with_decl (decl1,
6230 "third argument of `%s' should probably be `char **'");
6235 /* It is intentional that this message does not mention the third
6236 argument because it's only mentioned in an appendix of the
6238 if (argct > 0 && (argct < 2 || argct > 3))
6239 pedwarn_with_decl (decl1, "`%s' takes only zero or two arguments");
6241 if (! TREE_PUBLIC (decl1))
6242 pedwarn_with_decl (decl1, "`%s' is normally a non-static function");
6245 /* Record the decl so that the function name is defined.
6246 If we already have a decl for this name, and it is a FUNCTION_DECL,
6247 use the old decl. */
6249 current_function_decl = pushdecl (decl1);
6252 declare_parm_level (1);
6253 current_binding_level->subblocks_tag_transparent = 1;
6255 make_decl_rtl (current_function_decl, NULL);
6257 restype = TREE_TYPE (TREE_TYPE (current_function_decl));
6258 /* Promote the value to int before returning it. */
6259 if (c_promoting_integer_type_p (restype))
6261 /* It retains unsignedness if traditional
6262 or if not really getting wider. */
6263 if (TREE_UNSIGNED (restype)
6264 && (flag_traditional
6265 || (TYPE_PRECISION (restype)
6266 == TYPE_PRECISION (integer_type_node))))
6267 restype = unsigned_type_node;
6269 restype = integer_type_node;
6271 DECL_RESULT (current_function_decl)
6272 = build_decl (RESULT_DECL, NULL_TREE, restype);
6274 /* If this fcn was already referenced via a block-scope `extern' decl
6275 (or an implicit decl), propagate certain information about the usage. */
6276 if (TREE_ADDRESSABLE (DECL_ASSEMBLER_NAME (current_function_decl)))
6277 TREE_ADDRESSABLE (current_function_decl) = 1;
6279 immediate_size_expand = old_immediate_size_expand;
6281 start_fname_decls ();
6286 /* Record that this function is going to be a varargs function.
6287 This is called before store_parm_decls, which is too early
6288 to call mark_varargs directly. */
6293 c_function_varargs = 1;
6296 /* Store the parameter declarations into the current function declaration.
6297 This is called after parsing the parameter declarations, before
6298 digesting the body of the function.
6300 For an old-style definition, modify the function's type
6301 to specify at least the number of arguments. */
6306 tree fndecl = current_function_decl;
6309 /* This is either a chain of PARM_DECLs (if a prototype was used)
6310 or a list of IDENTIFIER_NODEs (for an old-fashioned C definition). */
6311 tree specparms = current_function_parms;
6313 /* This is a list of types declared among parms in a prototype. */
6314 tree parmtags = current_function_parm_tags;
6316 /* This is a chain of PARM_DECLs from old-style parm declarations. */
6317 tree parmdecls = getdecls ();
6319 /* This is a chain of any other decls that came in among the parm
6320 declarations. If a parm is declared with enum {foo, bar} x;
6321 then CONST_DECLs for foo and bar are put here. */
6324 /* Nonzero if this definition is written with a prototype. */
6327 /* The function containing FNDECL, if any. */
6328 tree context = decl_function_context (fndecl);
6330 if (specparms != 0 && TREE_CODE (specparms) != TREE_LIST)
6332 /* This case is when the function was defined with an ANSI prototype.
6333 The parms already have decls, so we need not do anything here
6334 except record them as in effect
6335 and complain if any redundant old-style parm decls were written. */
6346 error_with_decl (fndecl,
6347 "parm types given both in parmlist and separately");
6348 /* Get rid of the erroneous decls; don't keep them on
6349 the list of parms, since they might not be PARM_DECLs. */
6350 for (decl = current_binding_level->names;
6351 decl; decl = TREE_CHAIN (decl))
6352 if (DECL_NAME (decl))
6353 IDENTIFIER_LOCAL_VALUE (DECL_NAME (decl)) = 0;
6354 for (link = current_binding_level->shadowed;
6355 link; link = TREE_CHAIN (link))
6356 IDENTIFIER_LOCAL_VALUE (TREE_PURPOSE (link)) = TREE_VALUE (link);
6357 current_binding_level->names = 0;
6358 current_binding_level->shadowed = 0;
6361 specparms = nreverse (specparms);
6362 for (parm = specparms; parm; parm = next)
6364 next = TREE_CHAIN (parm);
6365 if (TREE_CODE (parm) == PARM_DECL)
6367 if (DECL_NAME (parm) == 0)
6368 error_with_decl (parm, "parameter name omitted");
6369 else if (TREE_CODE (TREE_TYPE (parm)) != ERROR_MARK
6370 && VOID_TYPE_P (TREE_TYPE (parm)))
6372 error_with_decl (parm, "parameter `%s' declared void");
6373 /* Change the type to error_mark_node so this parameter
6374 will be ignored by assign_parms. */
6375 TREE_TYPE (parm) = error_mark_node;
6381 /* If we find an enum constant or a type tag,
6382 put it aside for the moment. */
6383 TREE_CHAIN (parm) = 0;
6384 others = chainon (others, parm);
6388 /* Get the decls in their original chain order
6389 and record in the function. */
6390 DECL_ARGUMENTS (fndecl) = getdecls ();
6393 /* If this function takes a variable number of arguments,
6394 add a phony parameter to the end of the parm list,
6395 to represent the position of the first unnamed argument. */
6396 if (TREE_VALUE (tree_last (TYPE_ARG_TYPES (TREE_TYPE (fndecl))))
6399 tree dummy = build_decl (PARM_DECL, NULL_TREE, void_type_node);
6400 /* Let's hope the address of the unnamed parm
6401 won't depend on its type. */
6402 TREE_TYPE (dummy) = integer_type_node;
6403 DECL_ARG_TYPE (dummy) = integer_type_node;
6404 DECL_ARGUMENTS (fndecl) = chainon (DECL_ARGUMENTS (fndecl), dummy);
6408 /* Now pushdecl the enum constants. */
6409 for (parm = others; parm; parm = next)
6411 next = TREE_CHAIN (parm);
6412 if (DECL_NAME (parm) == 0)
6414 else if (TYPE_MAIN_VARIANT (TREE_TYPE (parm)) == void_type_node)
6416 else if (TREE_CODE (parm) != PARM_DECL)
6420 storetags (chainon (parmtags, gettags ()));
6424 /* SPECPARMS is an identifier list--a chain of TREE_LIST nodes
6425 each with a parm name as the TREE_VALUE.
6427 PARMDECLS is a chain of declarations for parameters.
6428 Warning! It can also contain CONST_DECLs which are not parameters
6429 but are names of enumerators of any enum types
6430 declared among the parameters.
6432 First match each formal parameter name with its declaration.
6433 Associate decls with the names and store the decls
6434 into the TREE_PURPOSE slots. */
6436 /* We use DECL_WEAK as a flag to show which parameters have been
6437 seen already since it is not used on PARM_DECL or CONST_DECL. */
6438 for (parm = parmdecls; parm; parm = TREE_CHAIN (parm))
6439 DECL_WEAK (parm) = 0;
6441 for (parm = specparms; parm; parm = TREE_CHAIN (parm))
6443 tree tail, found = NULL;
6445 if (TREE_VALUE (parm) == 0)
6447 error_with_decl (fndecl,
6448 "parameter name missing from parameter list");
6449 TREE_PURPOSE (parm) = 0;
6453 /* See if any of the parmdecls specifies this parm by name.
6454 Ignore any enumerator decls. */
6455 for (tail = parmdecls; tail; tail = TREE_CHAIN (tail))
6456 if (DECL_NAME (tail) == TREE_VALUE (parm)
6457 && TREE_CODE (tail) == PARM_DECL)
6463 /* If declaration already marked, we have a duplicate name.
6464 Complain, and don't use this decl twice. */
6465 if (found && DECL_WEAK (found))
6467 error_with_decl (found, "multiple parameters named `%s'");
6471 /* If the declaration says "void", complain and ignore it. */
6472 if (found && VOID_TYPE_P (TREE_TYPE (found)))
6474 error_with_decl (found, "parameter `%s' declared void");
6475 TREE_TYPE (found) = integer_type_node;
6476 DECL_ARG_TYPE (found) = integer_type_node;
6477 layout_decl (found, 0);
6480 /* Traditionally, a parm declared float is actually a double. */
6481 if (found && flag_traditional
6482 && TYPE_MAIN_VARIANT (TREE_TYPE (found)) == float_type_node)
6484 TREE_TYPE (found) = double_type_node;
6485 DECL_ARG_TYPE (found) = double_type_node;
6486 layout_decl (found, 0);
6489 /* If no declaration found, default to int. */
6492 found = build_decl (PARM_DECL, TREE_VALUE (parm),
6494 DECL_ARG_TYPE (found) = TREE_TYPE (found);
6495 DECL_SOURCE_LINE (found) = DECL_SOURCE_LINE (fndecl);
6496 DECL_SOURCE_FILE (found) = DECL_SOURCE_FILE (fndecl);
6498 pedwarn_with_decl (found, "type of `%s' defaults to `int'");
6499 else if (extra_warnings)
6500 warning_with_decl (found, "type of `%s' defaults to `int'");
6504 TREE_PURPOSE (parm) = found;
6506 /* Mark this decl as "already found". */
6507 DECL_WEAK (found) = 1;
6510 /* Put anything which is on the parmdecls chain and which is
6511 not a PARM_DECL onto the list NONPARMS. (The types of
6512 non-parm things which might appear on the list include
6513 enumerators and NULL-named TYPE_DECL nodes.) Complain about
6514 any actual PARM_DECLs not matched with any names. */
6517 for (parm = parmdecls; parm;)
6519 tree next = TREE_CHAIN (parm);
6520 TREE_CHAIN (parm) = 0;
6522 if (TREE_CODE (parm) != PARM_DECL)
6523 nonparms = chainon (nonparms, parm);
6526 /* Complain about args with incomplete types. */
6527 if (!COMPLETE_TYPE_P (TREE_TYPE (parm)))
6529 error_with_decl (parm, "parameter `%s' has incomplete type");
6530 TREE_TYPE (parm) = error_mark_node;
6533 if (! DECL_WEAK (parm))
6535 error_with_decl (parm,
6536 "declaration for parameter `%s' but no such parameter");
6537 /* Pretend the parameter was not missing.
6538 This gets us to a standard state and minimizes
6539 further error messages. */
6541 = chainon (specparms,
6542 tree_cons (parm, NULL_TREE, NULL_TREE));
6549 /* Chain the declarations together in the order of the list of
6550 names. Store that chain in the function decl, replacing the
6553 DECL_ARGUMENTS (fndecl) = 0;
6556 for (last = 0; parm; parm = TREE_CHAIN (parm))
6557 if (TREE_PURPOSE (parm))
6560 DECL_ARGUMENTS (fndecl) = TREE_PURPOSE (parm);
6562 TREE_CHAIN (last) = TREE_PURPOSE (parm);
6563 last = TREE_PURPOSE (parm);
6564 TREE_CHAIN (last) = 0;
6568 /* If there was a previous prototype,
6569 set the DECL_ARG_TYPE of each argument according to
6570 the type previously specified, and report any mismatches. */
6572 if (TYPE_ARG_TYPES (TREE_TYPE (fndecl)))
6575 for (parm = DECL_ARGUMENTS (fndecl),
6576 type = TYPE_ARG_TYPES (TREE_TYPE (fndecl));
6577 parm || (type && (TYPE_MAIN_VARIANT (TREE_VALUE (type))
6578 != void_type_node));
6579 parm = TREE_CHAIN (parm), type = TREE_CHAIN (type))
6581 if (parm == 0 || type == 0
6582 || TYPE_MAIN_VARIANT (TREE_VALUE (type)) == void_type_node)
6584 error ("number of arguments doesn't match prototype");
6585 error_with_file_and_line (current_function_prototype_file,
6586 current_function_prototype_line,
6587 "prototype declaration");
6590 /* Type for passing arg must be consistent with that
6591 declared for the arg. ISO C says we take the unqualified
6592 type for parameters declared with qualified type. */
6593 if (! comptypes (TYPE_MAIN_VARIANT (DECL_ARG_TYPE (parm)),
6594 TYPE_MAIN_VARIANT (TREE_VALUE (type))))
6596 if (TYPE_MAIN_VARIANT (TREE_TYPE (parm))
6597 == TYPE_MAIN_VARIANT (TREE_VALUE (type)))
6599 /* Adjust argument to match prototype. E.g. a previous
6600 `int foo(float);' prototype causes
6601 `int foo(x) float x; {...}' to be treated like
6602 `int foo(float x) {...}'. This is particularly
6603 useful for argument types like uid_t. */
6604 DECL_ARG_TYPE (parm) = TREE_TYPE (parm);
6606 if (PROMOTE_PROTOTYPES
6607 && INTEGRAL_TYPE_P (TREE_TYPE (parm))
6608 && TYPE_PRECISION (TREE_TYPE (parm))
6609 < TYPE_PRECISION (integer_type_node))
6610 DECL_ARG_TYPE (parm) = integer_type_node;
6614 pedwarn ("promoted argument `%s' doesn't match prototype",
6615 IDENTIFIER_POINTER (DECL_NAME (parm)));
6616 warning_with_file_and_line
6617 (current_function_prototype_file,
6618 current_function_prototype_line,
6619 "prototype declaration");
6622 /* If -traditional, allow `int' argument to match
6623 `unsigned' prototype. */
6624 else if (! (flag_traditional
6625 && TYPE_MAIN_VARIANT (TREE_TYPE (parm)) == integer_type_node
6626 && TYPE_MAIN_VARIANT (TREE_VALUE (type)) == unsigned_type_node))
6628 error ("argument `%s' doesn't match prototype",
6629 IDENTIFIER_POINTER (DECL_NAME (parm)));
6630 error_with_file_and_line (current_function_prototype_file,
6631 current_function_prototype_line,
6632 "prototype declaration");
6636 TYPE_ACTUAL_ARG_TYPES (TREE_TYPE (fndecl)) = 0;
6639 /* Otherwise, create a prototype that would match. */
6643 tree actual = 0, last = 0, type;
6645 for (parm = DECL_ARGUMENTS (fndecl); parm; parm = TREE_CHAIN (parm))
6647 type = tree_cons (NULL_TREE, DECL_ARG_TYPE (parm), NULL_TREE);
6649 TREE_CHAIN (last) = type;
6654 type = tree_cons (NULL_TREE, void_type_node, NULL_TREE);
6656 TREE_CHAIN (last) = type;
6660 /* We are going to assign a new value for the TYPE_ACTUAL_ARG_TYPES
6661 of the type of this function, but we need to avoid having this
6662 affect the types of other similarly-typed functions, so we must
6663 first force the generation of an identical (but separate) type
6664 node for the relevant function type. The new node we create
6665 will be a variant of the main variant of the original function
6668 TREE_TYPE (fndecl) = build_type_copy (TREE_TYPE (fndecl));
6670 TYPE_ACTUAL_ARG_TYPES (TREE_TYPE (fndecl)) = actual;
6673 /* Now store the final chain of decls for the arguments
6674 as the decl-chain of the current lexical scope.
6675 Put the enumerators in as well, at the front so that
6676 DECL_ARGUMENTS is not modified. */
6678 storedecls (chainon (nonparms, DECL_ARGUMENTS (fndecl)));
6681 /* Make sure the binding level for the top of the function body
6682 gets a BLOCK if there are any in the function.
6683 Otherwise, the dbx output is wrong. */
6685 keep_next_if_subblocks = 1;
6687 /* ??? This might be an improvement,
6688 but needs to be thought about some more. */
6690 keep_next_level_flag = 1;
6693 /* Write a record describing this function definition to the prototypes
6694 file (if requested). */
6696 gen_aux_info_record (fndecl, 1, 0, prototype);
6698 /* Initialize the RTL code for the function. */
6699 init_function_start (fndecl, input_filename, lineno);
6701 /* Begin the statement tree for this function. */
6702 begin_stmt_tree (&DECL_SAVED_TREE (current_function_decl));
6704 /* If this is a nested function, save away the sizes of any
6705 variable-size types so that we can expand them when generating
6711 DECL_LANG_SPECIFIC (fndecl)->pending_sizes
6712 = nreverse (get_pending_sizes ());
6713 for (t = DECL_LANG_SPECIFIC (fndecl)->pending_sizes;
6716 SAVE_EXPR_CONTEXT (TREE_VALUE (t)) = context;
6719 /* This function is being processed in whole-function mode. */
6720 cfun->x_whole_function_mode_p = 1;
6722 /* Even though we're inside a function body, we still don't want to
6723 call expand_expr to calculate the size of a variable-sized array.
6724 We haven't necessarily assigned RTL to all variables yet, so it's
6725 not safe to try to expand expressions involving them. */
6726 immediate_size_expand = 0;
6727 cfun->x_dont_save_pending_sizes_p = 1;
6730 /* Finish up a function declaration and compile that function
6731 all the way to assembler language output. The free the storage
6732 for the function definition.
6734 This is called after parsing the body of the function definition.
6736 NESTED is nonzero if the function being finished is nested in another. */
6739 finish_function (nested)
6742 tree fndecl = current_function_decl;
6744 /* TREE_READONLY (fndecl) = 1;
6745 This caused &foo to be of type ptr-to-const-function
6746 which then got a warning when stored in a ptr-to-function variable. */
6749 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl)) = fndecl;
6751 /* Must mark the RESULT_DECL as being in this function. */
6753 DECL_CONTEXT (DECL_RESULT (fndecl)) = fndecl;
6755 /* Obey `register' declarations if `setjmp' is called in this fn. */
6756 if (flag_traditional && current_function_calls_setjmp)
6758 setjmp_protect (DECL_INITIAL (fndecl));
6759 setjmp_protect_args ();
6762 if (MAIN_NAME_P (DECL_NAME (fndecl)) && flag_hosted)
6764 if (TYPE_MAIN_VARIANT (TREE_TYPE (TREE_TYPE (fndecl)))
6765 != integer_type_node)
6767 /* If warn_main is 1 (-Wmain) or 2 (-Wall), we have already warned.
6768 If warn_main is -1 (-Wno-main) we don't want to be warned. */
6770 pedwarn_with_decl (fndecl, "return type of `%s' is not `int'");
6774 #ifdef DEFAULT_MAIN_RETURN
6775 /* Make it so that `main' always returns success by default. */
6776 DEFAULT_MAIN_RETURN;
6779 c_expand_return (integer_zero_node);
6784 finish_fname_decls ();
6786 /* Tie off the statement tree for this function. */
6787 finish_stmt_tree (&DECL_SAVED_TREE (fndecl));
6788 /* Clear out memory we no longer need. */
6789 free_after_parsing (cfun);
6790 /* Since we never call rest_of_compilation, we never clear
6791 CFUN. Do so explicitly. */
6792 free_after_compilation (cfun);
6797 /* Generate RTL for the body of this function. */
6798 c_expand_body (fndecl, nested);
6799 /* Let the error reporting routines know that we're outside a
6800 function. For a nested function, this value is used in
6801 pop_c_function_context and then reset via pop_function_context. */
6802 current_function_decl = NULL;
6806 /* Generate the RTL for the body of FNDECL. If NESTED_P is non-zero,
6807 then we are already in the process of generating RTL for another
6811 c_expand_body (fndecl, nested_p)
6815 int uninlinable = 1;
6817 /* There's no reason to do any of the work here if we're only doing
6818 semantic analysis; this code just generates RTL. */
6819 if (flag_syntax_only)
6822 timevar_push (TV_EXPAND);
6824 if (flag_inline_trees)
6826 /* First, cache whether the current function is inlinable. Some
6827 predicates depend on cfun and current_function_decl to
6828 function completely. */
6829 uninlinable = ! tree_inlinable_function_p (fndecl);
6831 /* Then, inline any functions called in it. */
6832 optimize_inline_calls (fndecl);
6837 /* Make sure that we will evaluate variable-sized types involved
6838 in our function's type. */
6839 expand_pending_sizes (DECL_LANG_SPECIFIC (fndecl)->pending_sizes);
6840 /* Squirrel away our current state. */
6841 push_function_context ();
6844 /* Initialize the RTL code for the function. */
6845 current_function_decl = fndecl;
6846 init_function_start (fndecl, input_filename, DECL_SOURCE_LINE (fndecl));
6848 /* This function is being processed in whole-function mode. */
6849 cfun->x_whole_function_mode_p = 1;
6851 /* Even though we're inside a function body, we still don't want to
6852 call expand_expr to calculate the size of a variable-sized array.
6853 We haven't necessarily assigned RTL to all variables yet, so it's
6854 not safe to try to expand expressions involving them. */
6855 immediate_size_expand = 0;
6856 cfun->x_dont_save_pending_sizes_p = 1;
6858 /* If this is a varargs function, inform function.c. */
6859 if (c_function_varargs)
6862 /* Set up parameters and prepare for return, for the function. */
6863 expand_function_start (fndecl, 0);
6865 /* If this function is `main', emit a call to `__main'
6866 to run global initializers, etc. */
6867 if (DECL_NAME (fndecl)
6868 && MAIN_NAME_P (DECL_NAME (fndecl))
6869 && DECL_CONTEXT (fndecl) == NULL_TREE)
6870 expand_main_function ();
6872 /* Generate the RTL for this function. */
6873 expand_stmt (DECL_SAVED_TREE (fndecl));
6876 /* Allow the body of the function to be garbage collected. */
6877 DECL_SAVED_TREE (fndecl) = NULL_TREE;
6880 /* We hard-wired immediate_size_expand to zero above.
6881 expand_function_end will decrement this variable. So, we set the
6882 variable to one here, so that after the decrement it will remain
6884 immediate_size_expand = 1;
6886 /* Allow language dialects to perform special processing. */
6887 if (lang_expand_function_end)
6888 (*lang_expand_function_end) ();
6890 /* Generate rtl for function exit. */
6891 expand_function_end (input_filename, lineno, 0);
6893 /* If this is a nested function, protect the local variables in the stack
6894 above us from being collected while we're compiling this function. */
6896 ggc_push_context ();
6898 /* Run the optimizers and output the assembler code for this function. */
6899 rest_of_compilation (fndecl);
6901 /* Undo the GC context switch. */
6905 /* With just -W, complain only if function returns both with
6906 and without a value. */
6908 && current_function_returns_value
6909 && current_function_returns_null)
6910 warning ("this function may return with or without a value");
6912 /* If requested, warn about function definitions where the function will
6913 return a value (usually of some struct or union type) which itself will
6914 take up a lot of stack space. */
6916 if (warn_larger_than && !DECL_EXTERNAL (fndecl) && TREE_TYPE (fndecl))
6918 tree ret_type = TREE_TYPE (TREE_TYPE (fndecl));
6920 if (ret_type && TYPE_SIZE_UNIT (ret_type)
6921 && TREE_CODE (TYPE_SIZE_UNIT (ret_type)) == INTEGER_CST
6922 && 0 < compare_tree_int (TYPE_SIZE_UNIT (ret_type),
6925 unsigned int size_as_int
6926 = TREE_INT_CST_LOW (TYPE_SIZE_UNIT (ret_type));
6928 if (compare_tree_int (TYPE_SIZE_UNIT (ret_type), size_as_int) == 0)
6929 warning_with_decl (fndecl,
6930 "size of return value of `%s' is %u bytes",
6933 warning_with_decl (fndecl,
6934 "size of return value of `%s' is larger than %d bytes",
6939 if (DECL_SAVED_INSNS (fndecl) == 0 && ! nested_p
6940 && ! flag_inline_trees)
6942 /* Stop pointing to the local nodes about to be freed.
6943 But DECL_INITIAL must remain nonzero so we know this
6944 was an actual function definition.
6945 For a nested function, this is done in pop_c_function_context.
6946 If rest_of_compilation set this to 0, leave it 0. */
6947 if (DECL_INITIAL (fndecl) != 0)
6948 DECL_INITIAL (fndecl) = error_mark_node;
6950 DECL_ARGUMENTS (fndecl) = 0;
6953 if (DECL_STATIC_CONSTRUCTOR (fndecl))
6955 if (targetm.have_ctors_dtors)
6956 (* targetm.asm_out.constructor) (XEXP (DECL_RTL (fndecl), 0),
6957 DEFAULT_INIT_PRIORITY);
6959 static_ctors = tree_cons (NULL_TREE, fndecl, static_ctors);
6962 if (DECL_STATIC_DESTRUCTOR (fndecl))
6964 if (targetm.have_ctors_dtors)
6965 (* targetm.asm_out.destructor) (XEXP (DECL_RTL (fndecl), 0),
6966 DEFAULT_INIT_PRIORITY);
6968 static_dtors = tree_cons (NULL_TREE, fndecl, static_dtors);
6972 /* Return to the enclosing function. */
6973 pop_function_context ();
6974 timevar_pop (TV_EXPAND);
6977 /* Check the declarations given in a for-loop for satisfying the C99
6980 check_for_loop_decls ()
6986 /* If we get here, declarations have been used in a for loop without
6987 the C99 for loop scope. This doesn't make much sense, so don't
6989 error ("`for' loop initial declaration used outside C99 mode");
6992 /* C99 subclause 6.8.5 paragraph 3:
6994 [#3] The declaration part of a for statement shall only
6995 declare identifiers for objects having storage class auto or
6998 It isn't clear whether, in this sentence, "identifiers" binds to
6999 "shall only declare" or to "objects" - that is, whether all identifiers
7000 declared must be identifiers for objects, or whether the restriction
7001 only applies to those that are. (A question on this in comp.std.c
7002 in November 2000 received no answer.) We implement the strictest
7003 interpretation, to avoid creating an extension which later causes
7006 for (t = gettags (); t; t = TREE_CHAIN (t))
7008 if (TREE_PURPOSE (t) != 0)
7010 enum tree_code code = TREE_CODE (TREE_VALUE (t));
7012 if (code == RECORD_TYPE)
7013 error ("`struct %s' declared in `for' loop initial declaration",
7014 IDENTIFIER_POINTER (TREE_PURPOSE (t)));
7015 else if (code == UNION_TYPE)
7016 error ("`union %s' declared in `for' loop initial declaration",
7017 IDENTIFIER_POINTER (TREE_PURPOSE (t)));
7019 error ("`enum %s' declared in `for' loop initial declaration",
7020 IDENTIFIER_POINTER (TREE_PURPOSE (t)));
7024 for (t = getdecls (); t; t = TREE_CHAIN (t))
7026 if (TREE_CODE (t) != VAR_DECL && DECL_NAME (t))
7027 error_with_decl (t, "declaration of non-variable `%s' in `for' loop initial declaration");
7028 else if (TREE_STATIC (t))
7029 error_with_decl (t, "declaration of static variable `%s' in `for' loop initial declaration");
7030 else if (DECL_EXTERNAL (t))
7031 error_with_decl (t, "declaration of `extern' variable `%s' in `for' loop initial declaration");
7035 /* Save and restore the variables in this file and elsewhere
7036 that keep track of the progress of compilation of the current function.
7037 Used for nested functions. */
7039 struct c_language_function
7041 struct language_function base;
7043 tree shadowed_labels;
7046 int warn_about_return_type;
7048 struct binding_level *binding_level;
7051 /* Save and reinitialize the variables
7052 used during compilation of a C function. */
7055 push_c_function_context (f)
7058 struct c_language_function *p;
7059 p = ((struct c_language_function *)
7060 xmalloc (sizeof (struct c_language_function)));
7061 f->language = (struct language_function *) p;
7063 p->base.x_stmt_tree = c_stmt_tree;
7064 p->base.x_scope_stmt_stack = c_scope_stmt_stack;
7065 p->named_labels = named_labels;
7066 p->shadowed_labels = shadowed_labels;
7067 p->returns_value = current_function_returns_value;
7068 p->returns_null = current_function_returns_null;
7069 p->warn_about_return_type = warn_about_return_type;
7070 p->extern_inline = current_extern_inline;
7071 p->binding_level = current_binding_level;
7074 /* Restore the variables used during compilation of a C function. */
7077 pop_c_function_context (f)
7080 struct c_language_function *p
7081 = (struct c_language_function *) f->language;
7084 /* Bring back all the labels that were shadowed. */
7085 for (link = shadowed_labels; link; link = TREE_CHAIN (link))
7086 if (DECL_NAME (TREE_VALUE (link)) != 0)
7087 IDENTIFIER_LABEL_VALUE (DECL_NAME (TREE_VALUE (link)))
7088 = TREE_VALUE (link);
7090 if (DECL_SAVED_INSNS (current_function_decl) == 0
7091 && DECL_SAVED_TREE (current_function_decl) == NULL_TREE)
7093 /* Stop pointing to the local nodes about to be freed. */
7094 /* But DECL_INITIAL must remain nonzero so we know this
7095 was an actual function definition. */
7096 DECL_INITIAL (current_function_decl) = error_mark_node;
7097 DECL_ARGUMENTS (current_function_decl) = 0;
7100 c_stmt_tree = p->base.x_stmt_tree;
7101 c_scope_stmt_stack = p->base.x_scope_stmt_stack;
7102 named_labels = p->named_labels;
7103 shadowed_labels = p->shadowed_labels;
7104 current_function_returns_value = p->returns_value;
7105 current_function_returns_null = p->returns_null;
7106 warn_about_return_type = p->warn_about_return_type;
7107 current_extern_inline = p->extern_inline;
7108 current_binding_level = p->binding_level;
7114 /* Mark the language specific parts of F for GC. */
7117 mark_c_function_context (f)
7120 struct c_language_function *p
7121 = (struct c_language_function *) f->language;
7126 mark_c_language_function (&p->base);
7127 ggc_mark_tree (p->shadowed_labels);
7128 ggc_mark_tree (p->named_labels);
7129 mark_binding_level (&p->binding_level);
7132 /* Copy the DECL_LANG_SPECIFIC data associated with NODE. */
7135 copy_lang_decl (decl)
7138 struct lang_decl *ld;
7140 if (!DECL_LANG_SPECIFIC (decl))
7143 ld = (struct lang_decl *) ggc_alloc (sizeof (struct lang_decl));
7144 memcpy ((char *) ld, (char *) DECL_LANG_SPECIFIC (decl),
7145 sizeof (struct lang_decl));
7146 DECL_LANG_SPECIFIC (decl) = ld;
7149 /* Mark the language specific bits in T for GC. */
7155 if (TREE_CODE (t) == IDENTIFIER_NODE)
7157 struct lang_identifier *i = (struct lang_identifier *) t;
7158 ggc_mark_tree (i->global_value);
7159 ggc_mark_tree (i->local_value);
7160 ggc_mark_tree (i->label_value);
7161 ggc_mark_tree (i->implicit_decl);
7162 ggc_mark_tree (i->error_locus);
7163 ggc_mark_tree (i->limbo_value);
7165 else if (TYPE_P (t) && TYPE_LANG_SPECIFIC (t))
7166 ggc_mark (TYPE_LANG_SPECIFIC (t));
7167 else if (DECL_P (t) && DECL_LANG_SPECIFIC (t))
7169 ggc_mark (DECL_LANG_SPECIFIC (t));
7170 c_mark_lang_decl (&DECL_LANG_SPECIFIC (t)->base);
7171 ggc_mark_tree (DECL_LANG_SPECIFIC (t)->pending_sizes);
7175 /* The functions below are required for functionality of doing
7176 function at once processing in the C front end. Currently these
7177 functions are not called from anywhere in the C front end, but as
7178 these changes continue, that will change. */
7180 /* Returns non-zero if the current statement is a full expression,
7181 i.e. temporaries created during that statement should be destroyed
7182 at the end of the statement. */
7185 stmts_are_full_exprs_p ()
7190 /* Returns the stmt_tree (if any) to which statements are currently
7191 being added. If there is no active statement-tree, NULL is
7195 current_stmt_tree ()
7197 return &c_stmt_tree;
7200 /* Returns the stack of SCOPE_STMTs for the current function. */
7203 current_scope_stmt_stack ()
7205 return &c_scope_stmt_stack;
7208 /* Nonzero if TYPE is an anonymous union or struct type. Always 0 in
7212 anon_aggr_type_p (node)
7213 tree node ATTRIBUTE_UNUSED;
7218 /* Dummy function in place of callback used by C++. */
7221 extract_interface_info ()
7225 /* Return a new COMPOUND_STMT, after adding it to the current
7229 c_begin_compound_stmt ()
7233 /* Create the COMPOUND_STMT. */
7234 stmt = add_stmt (build_stmt (COMPOUND_STMT, NULL_TREE));
7239 /* Expand T (a DECL_STMT) if it declares an entity not handled by the
7243 c_expand_decl_stmt (t)
7246 tree decl = DECL_STMT_DECL (t);
7248 /* Expand nested functions. */
7249 if (TREE_CODE (decl) == FUNCTION_DECL
7250 && DECL_CONTEXT (decl) == current_function_decl
7251 && DECL_SAVED_TREE (decl))
7252 c_expand_body (decl, /*nested_p=*/1);
7255 /* Return the IDENTIFIER_GLOBAL_VALUE of T, for use in common code, since
7256 the definition of IDENTIFIER_GLOBAL_VALUE is different for C and C++. */
7259 identifier_global_value (t)
7262 return IDENTIFIER_GLOBAL_VALUE (t);
7265 /* Record a builtin type for C. If NAME is non-NULL, it is the name used;
7266 otherwise the name is found in ridpointers from RID_INDEX. */
7269 record_builtin_type (rid_index, name, type)
7276 id = ridpointers[(int) rid_index];
7278 id = get_identifier (name);
7279 pushdecl (build_decl (TYPE_DECL, id, type));
7282 /* Build the void_list_node (void_type_node having been created). */
7284 build_void_list_node ()
7286 tree t = build_tree_list (NULL_TREE, void_type_node);