1 /* Process declarations and variables for C compiler.
2 Copyright (C) 1988, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000
3 Free Software Foundation, Inc.
5 This file is part of GNU CC.
7 GNU CC is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
12 GNU CC is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GNU CC; see the file COPYING. If not, write to
19 the Free Software Foundation, 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
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. */
46 /* In grokdeclarator, distinguish syntactic contexts of declarators. */
48 { NORMAL, /* Ordinary declaration */
49 FUNCDEF, /* Function definition */
50 PARM, /* Declaration of parm before function body */
51 FIELD, /* Declaration inside struct or union */
52 BITFIELD, /* Likewise but with specified width */
53 TYPENAME}; /* Typename (inside cast or sizeof) */
55 /* We let tm.h override the types used here, to handle trivial differences
56 such as the choice of unsigned int or long unsigned int for size_t.
57 When machines start needing nontrivial differences in the size type,
58 it would be best to do something here to figure out automatically
59 from other information what type to use. */
62 #define SIZE_TYPE "long unsigned int"
66 #define PTRDIFF_TYPE "long int"
70 #define WCHAR_TYPE "int"
74 #define WINT_TYPE "unsigned int"
78 #define INTMAX_TYPE ((INT_TYPE_SIZE == LONG_LONG_TYPE_SIZE) \
80 : ((LONG_TYPE_SIZE == LONG_LONG_TYPE_SIZE) \
86 #define UINTMAX_TYPE ((INT_TYPE_SIZE == LONG_LONG_TYPE_SIZE) \
88 : ((LONG_TYPE_SIZE == LONG_LONG_TYPE_SIZE) \
89 ? "long unsigned int" \
90 : "long long unsigned int"))
93 /* Nonzero if we have seen an invalid cross reference
94 to a struct, union, or enum, but not yet printed the message. */
96 tree pending_invalid_xref;
97 /* File and line to appear in the eventual error message. */
98 const char *pending_invalid_xref_file;
99 int pending_invalid_xref_line;
101 /* While defining an enum type, this is 1 plus the last enumerator
102 constant value. Note that will do not have to save this or `enum_overflow'
103 around nested function definition since such a definition could only
104 occur in an enum value expression and we don't use these variables in
107 static tree enum_next_value;
109 /* Nonzero means that there was overflow computing enum_next_value. */
111 static int enum_overflow;
113 /* Parsing a function declarator leaves a list of parameter names
114 or a chain or parameter decls here. */
116 static tree last_function_parms;
118 /* Parsing a function declarator leaves here a chain of structure
119 and enum types declared in the parmlist. */
121 static tree last_function_parm_tags;
123 /* After parsing the declarator that starts a function definition,
124 `start_function' puts here the list of parameter names or chain of decls.
125 `store_parm_decls' finds it here. */
127 static tree current_function_parms;
129 /* Similar, for last_function_parm_tags. */
130 static tree current_function_parm_tags;
132 /* Similar, for the file and line that the prototype came from if this is
133 an old-style definition. */
134 static const char *current_function_prototype_file;
135 static int current_function_prototype_line;
137 /* The current statement tree. */
139 static struct stmt_tree_s c_stmt_tree;
141 /* The current scope statement stack. */
143 static tree c_scope_stmt_stack;
145 /* Nonzero if __FUNCTION__ and its ilk have been declared in this
148 static int c_function_name_declared_p;
150 /* A list (chain of TREE_LIST nodes) of all LABEL_DECLs in the function
151 that have names. Here so we can clear out their names' definitions
152 at the end of the function. */
154 static tree named_labels;
156 /* A list of LABEL_DECLs from outer contexts that are currently shadowed. */
158 static tree shadowed_labels;
160 /* Nonzero when store_parm_decls is called indicates a varargs function.
161 Value not meaningful after store_parm_decls. */
163 static int c_function_varargs;
165 /* Set to 0 at beginning of a function definition, set to 1 if
166 a return statement that specifies a return value is seen. */
168 int current_function_returns_value;
170 /* Set to 0 at beginning of a function definition, set to 1 if
171 a return statement with no argument is seen. */
173 int current_function_returns_null;
175 /* Set to nonzero by `grokdeclarator' for a function
176 whose return type is defaulted, if warnings for this are desired. */
178 static int warn_about_return_type;
180 /* Nonzero when starting a function declared `extern inline'. */
182 static int current_extern_inline;
184 /* For each binding contour we allocate a binding_level structure
185 * which records the names defined in that contour.
188 * 1) one for each function definition,
189 * where internal declarations of the parameters appear.
190 * 2) one for each compound statement,
191 * to record its declarations.
193 * The current meaning of a name can be found by searching the levels from
194 * the current one out to the global one.
197 /* Note that the information in the `names' component of the global contour
198 is duplicated in the IDENTIFIER_GLOBAL_VALUEs of all identifiers. */
202 /* A chain of _DECL nodes for all variables, constants, functions,
203 and typedef types. These are in the reverse of the order supplied.
207 /* A list of structure, union and enum definitions,
208 * for looking up tag names.
209 * It is a chain of TREE_LIST nodes, each of whose TREE_PURPOSE is a name,
210 * or NULL_TREE; and whose TREE_VALUE is a RECORD_TYPE, UNION_TYPE,
211 * or ENUMERAL_TYPE node.
215 /* For each level, a list of shadowed outer-level local definitions
216 to be restored when this level is popped.
217 Each link is a TREE_LIST whose TREE_PURPOSE is an identifier and
218 whose TREE_VALUE is its old definition (a kind of ..._DECL node). */
221 /* For each level (except not the global one),
222 a chain of BLOCK nodes for all the levels
223 that were entered and exited one level down. */
226 /* The BLOCK node for this level, if one has been preallocated.
227 If 0, the BLOCK is allocated (if needed) when the level is popped. */
230 /* The binding level which this one is contained in (inherits from). */
231 struct binding_level *level_chain;
233 /* Nonzero for the level that holds the parameters of a function. */
236 /* Nonzero if this level "doesn't exist" for tags. */
237 char tag_transparent;
239 /* Nonzero if sublevels of this level "don't exist" for tags.
240 This is set in the parm level of a function definition
241 while reading the function body, so that the outermost block
242 of the function body will be tag-transparent. */
243 char subblocks_tag_transparent;
245 /* Nonzero means make a BLOCK for this level regardless of all else. */
248 /* Nonzero means make a BLOCK if this level has any subblocks. */
249 char keep_if_subblocks;
251 /* Number of decls in `names' that have incomplete
252 structure or union types. */
255 /* A list of decls giving the (reversed) specified order of parms,
256 not including any forward-decls in the parmlist.
257 This is so we can put the parms in proper order for assign_parms. */
261 #define NULL_BINDING_LEVEL (struct binding_level *) NULL
263 /* The binding level currently in effect. */
265 static struct binding_level *current_binding_level;
267 /* A chain of binding_level structures awaiting reuse. */
269 static struct binding_level *free_binding_level;
271 /* The outermost binding level, for names of file scope.
272 This is created when the compiler is started and exists
273 through the entire run. */
275 static struct binding_level *global_binding_level;
277 /* Binding level structures are initialized by copying this one. */
279 static struct binding_level clear_binding_level
280 = {NULL, NULL, NULL, NULL, NULL, NULL_BINDING_LEVEL, 0, 0, 0, 0, 0, 0,
283 /* Nonzero means unconditionally make a BLOCK for the next level pushed. */
285 static int keep_next_level_flag;
287 /* Nonzero means make a BLOCK for the next level pushed
288 if it has subblocks. */
290 static int keep_next_if_subblocks;
292 /* The chain of outer levels of label scopes.
293 This uses the same data structure used for binding levels,
294 but it works differently: each link in the chain records
295 saved values of named_labels and shadowed_labels for
296 a label binding level outside the current one. */
298 static struct binding_level *label_level_chain;
300 /* Functions called automatically at the beginning and end of execution. */
302 tree static_ctors, static_dtors;
304 /* Forward declarations. */
306 static struct binding_level * make_binding_level PARAMS ((void));
307 static void mark_binding_level PARAMS ((void *));
308 static void clear_limbo_values PARAMS ((tree));
309 static int duplicate_decls PARAMS ((tree, tree, int));
310 static int redeclaration_error_message PARAMS ((tree, tree));
311 static void storedecls PARAMS ((tree));
312 static void storetags PARAMS ((tree));
313 static tree lookup_tag PARAMS ((enum tree_code, tree,
314 struct binding_level *, int));
315 static tree lookup_tag_reverse PARAMS ((tree));
316 static tree grokdeclarator PARAMS ((tree, tree, enum decl_context,
318 static tree grokparms PARAMS ((tree, int));
319 static void layout_array_type PARAMS ((tree));
320 static tree c_make_fname_decl PARAMS ((tree, const char *, int));
321 static void c_expand_body PARAMS ((tree, int));
323 /* C-specific option variables. */
325 /* Nonzero means allow type mismatches in conditional expressions;
326 just make their values `void'. */
328 int flag_cond_mismatch;
330 /* Nonzero means give `double' the same size as `float'. */
332 int flag_short_double;
334 /* Nonzero means give `wchar_t' the same size as `short'. */
336 int flag_short_wchar;
338 /* Nonzero means don't recognize the keyword `asm'. */
342 /* Nonzero means do some things the same way PCC does. */
344 int flag_traditional;
346 /* Nonzero means enable C89 Amendment 1 features, other than digraphs. */
350 /* Nonzero means use the ISO C99 dialect of C. */
354 /* Nonzero means accept digraphs. */
356 int flag_digraphs = 1;
358 /* Nonzero means that we have builtin functions, and main is an int */
362 /* Nonzero means add default format_arg attributes for functions not
365 int flag_noniso_default_format_attributes = 1;
367 /* Nonzero means to allow single precision math even if we're generally
368 being traditional. */
369 int flag_allow_single_precision = 0;
371 /* Nonzero means to treat bitfields as signed unless they say `unsigned'. */
373 int flag_signed_bitfields = 1;
374 int explicit_flag_signed_bitfields = 0;
376 /* Nonzero means warn about use of implicit int. */
378 int warn_implicit_int;
380 /* Nonzero means warn about usage of long long when `-pedantic'. */
382 int warn_long_long = 1;
384 /* Nonzero means message about use of implicit function declarations;
385 1 means warning; 2 means error. */
387 int mesg_implicit_function_declaration = -1;
389 /* Nonzero means give string constants the type `const char *'
390 to get extra warnings from them. These warnings will be too numerous
391 to be useful, except in thoroughly ANSIfied programs. */
393 int flag_const_strings;
395 /* Nonzero means warn about pointer casts that can drop a type qualifier
396 from the pointer target type. */
400 /* Nonzero means warn when casting a function call to a type that does
401 not match the return type (e.g. (float)sqrt() or (anything*)malloc()
402 when there is no previous declaration of sqrt or malloc. */
404 int warn_bad_function_cast;
406 /* Warn about functions which might be candidates for format attributes. */
408 int warn_missing_format_attribute;
410 /* Warn about traditional constructs whose meanings changed in ANSI C. */
412 int warn_traditional;
414 /* Nonzero means warn about sizeof(function) or addition/subtraction
415 of function pointers. */
417 int warn_pointer_arith;
419 /* Nonzero means warn for non-prototype function decls
420 or non-prototyped defs without previous prototype. */
422 int warn_strict_prototypes;
424 /* Nonzero means warn for any global function def
425 without separate previous prototype decl. */
427 int warn_missing_prototypes;
429 /* Nonzero means warn for any global function def
430 without separate previous decl. */
432 int warn_missing_declarations;
434 /* Nonzero means warn about multiple (redundant) decls for the same single
435 variable or function. */
437 int warn_redundant_decls = 0;
439 /* Nonzero means warn about extern declarations of objects not at
440 file-scope level and about *all* declarations of functions (whether
441 extern or static) not at file-scope level. Note that we exclude
442 implicit function declarations. To get warnings about those, use
445 int warn_nested_externs = 0;
447 /* Warn about *printf or *scanf format/argument anomalies. */
451 /* Warn about a subscript that has type char. */
453 int warn_char_subscripts = 0;
455 /* Warn if a type conversion is done that might have confusing results. */
459 /* Warn if adding () is suggested. */
461 int warn_parentheses;
463 /* Warn if initializer is not completely bracketed. */
465 int warn_missing_braces;
467 /* Warn if main is suspicious. */
471 /* Warn about #pragma directives that are not recognised. */
473 int warn_unknown_pragmas = 0; /* Tri state variable. */
475 /* Warn about comparison of signed and unsigned values.
476 If -1, neither -Wsign-compare nor -Wno-sign-compare has been specified. */
478 int warn_sign_compare = -1;
480 /* Warn about testing equality of floating point numbers. */
482 int warn_float_equal = 0;
484 /* Nonzero means warn about use of multicharacter literals. */
486 int warn_multichar = 1;
488 /* The variant of the C language being processed. */
490 c_language_kind c_language = clk_c;
492 /* Nonzero means `$' can be in an identifier. */
494 #ifndef DOLLARS_IN_IDENTIFIERS
495 #define DOLLARS_IN_IDENTIFIERS 1
497 int dollars_in_ident = DOLLARS_IN_IDENTIFIERS;
499 /* Decode the string P as a language-specific option for C.
500 Return the number of strings consumed. Should not complain
501 if it does not recognise the option. */
504 c_decode_option (argc, argv)
505 int argc ATTRIBUTE_UNUSED;
508 int strings_processed;
509 const char *option_value = NULL;
512 strings_processed = cpp_handle_option (parse_in, argc, argv);
514 if (!strcmp (p, "-lang-objc"))
515 c_language = clk_objective_c;
516 else if (!strcmp (p, "-ftraditional") || !strcmp (p, "-traditional"))
518 flag_traditional = 1;
519 flag_writable_strings = 1;
522 else if (!strcmp (p, "-fallow-single-precision"))
523 flag_allow_single_precision = 1;
524 else if (!strcmp (p, "-fhosted") || !strcmp (p, "-fno-freestanding"))
529 else if (!strcmp (p, "-ffreestanding") || !strcmp (p, "-fno-hosted"))
533 /* warn_main will be 2 if set by -Wall, 1 if set by -Wmain */
537 else if (!strcmp (p, "-fnotraditional") || !strcmp (p, "-fno-traditional"))
539 flag_traditional = 0;
540 flag_writable_strings = 0;
543 else if (!strncmp (p, "-std=", 5))
545 /* Select the appropriate language standard. We currently
547 -std=iso9899:1990 same as -ansi
548 -std=iso9899:199409 ISO C as modified in amend. 1
549 -std=iso9899:1999 ISO C 99
550 -std=c89 same as -std=iso9899:1990
551 -std=c99 same as -std=iso9899:1999
552 -std=gnu89 default, iso9899:1990 + gnu extensions
553 -std=gnu99 iso9899:1999 + gnu extensions
555 const char *argstart = &p[5];
557 if (!strcmp (argstart, "iso9899:1990")
558 || !strcmp (argstart, "c89"))
564 flag_traditional = 0;
565 flag_writable_strings = 0;
567 flag_no_nonansi_builtin = 1;
568 flag_noniso_default_format_attributes = 0;
571 else if (!strcmp (argstart, "iso9899:199409"))
575 goto iso_1990_digraphs;
577 else if (!strcmp (argstart, "iso9899:199x")
578 || !strcmp (argstart, "iso9899:1999")
579 || !strcmp (argstart, "c9x")
580 || !strcmp (argstart, "c99"))
582 flag_traditional = 0;
583 flag_writable_strings = 0;
585 flag_no_nonansi_builtin = 1;
586 flag_noniso_default_format_attributes = 0;
591 else if (!strcmp (argstart, "gnu89"))
593 flag_traditional = 0;
594 flag_writable_strings = 0;
596 flag_no_nonansi_builtin = 0;
597 flag_noniso_default_format_attributes = 1;
602 else if (!strcmp (argstart, "gnu9x") || !strcmp (argstart, "gnu99"))
604 flag_traditional = 0;
605 flag_writable_strings = 0;
607 flag_no_nonansi_builtin = 0;
608 flag_noniso_default_format_attributes = 1;
614 error ("unknown C standard `%s'", argstart);
616 else if (!strcmp (p, "-fdollars-in-identifiers"))
617 dollars_in_ident = 1;
618 else if (!strcmp (p, "-fno-dollars-in-identifiers"))
619 dollars_in_ident = 0;
620 else if (!strcmp (p, "-fsigned-char"))
621 flag_signed_char = 1;
622 else if (!strcmp (p, "-funsigned-char"))
623 flag_signed_char = 0;
624 else if (!strcmp (p, "-fno-signed-char"))
625 flag_signed_char = 0;
626 else if (!strcmp (p, "-fno-unsigned-char"))
627 flag_signed_char = 1;
628 else if (!strcmp (p, "-fsigned-bitfields")
629 || !strcmp (p, "-fno-unsigned-bitfields"))
631 flag_signed_bitfields = 1;
632 explicit_flag_signed_bitfields = 1;
634 else if (!strcmp (p, "-funsigned-bitfields")
635 || !strcmp (p, "-fno-signed-bitfields"))
637 flag_signed_bitfields = 0;
638 explicit_flag_signed_bitfields = 1;
640 else if (!strcmp (p, "-fshort-enums"))
641 flag_short_enums = 1;
642 else if (!strcmp (p, "-fno-short-enums"))
643 flag_short_enums = 0;
644 else if (!strcmp (p, "-fshort-wchar"))
645 flag_short_wchar = 1;
646 else if (!strcmp (p, "-fno-short-wchar"))
647 flag_short_wchar = 0;
648 else if (!strcmp (p, "-fcond-mismatch"))
649 flag_cond_mismatch = 1;
650 else if (!strcmp (p, "-fno-cond-mismatch"))
651 flag_cond_mismatch = 0;
652 else if (!strcmp (p, "-fshort-double"))
653 flag_short_double = 1;
654 else if (!strcmp (p, "-fno-short-double"))
655 flag_short_double = 0;
656 else if (!strcmp (p, "-fasm"))
658 else if (!strcmp (p, "-fno-asm"))
660 else if (!strcmp (p, "-fbuiltin"))
662 else if (!strcmp (p, "-fno-builtin"))
664 else if ((option_value
665 = skip_leading_substring (p, "-fdump-translation-unit-")))
668 error ("no file specified with -fdump-translation-unit");
670 flag_dump_translation_unit = option_value;
672 else if (!strcmp (p, "-ansi"))
674 else if (!strcmp (p, "-Werror-implicit-function-declaration"))
675 mesg_implicit_function_declaration = 2;
676 else if (!strcmp (p, "-Wimplicit-function-declaration"))
677 mesg_implicit_function_declaration = 1;
678 else if (!strcmp (p, "-Wno-implicit-function-declaration"))
679 mesg_implicit_function_declaration = 0;
680 else if (!strcmp (p, "-Wimplicit-int"))
681 warn_implicit_int = 1;
682 else if (!strcmp (p, "-Wno-implicit-int"))
683 warn_implicit_int = 0;
684 else if (!strcmp (p, "-Wimplicit"))
686 warn_implicit_int = 1;
687 if (mesg_implicit_function_declaration != 2)
688 mesg_implicit_function_declaration = 1;
690 else if (!strcmp (p, "-Wno-implicit"))
691 warn_implicit_int = 0, mesg_implicit_function_declaration = 0;
692 else if (!strcmp (p, "-Wlong-long"))
694 else if (!strcmp (p, "-Wno-long-long"))
696 else if (!strcmp (p, "-Wwrite-strings"))
697 flag_const_strings = 1;
698 else if (!strcmp (p, "-Wno-write-strings"))
699 flag_const_strings = 0;
700 else if (!strcmp (p, "-Wcast-qual"))
702 else if (!strcmp (p, "-Wno-cast-qual"))
704 else if (!strcmp (p, "-Wbad-function-cast"))
705 warn_bad_function_cast = 1;
706 else if (!strcmp (p, "-Wno-bad-function-cast"))
707 warn_bad_function_cast = 0;
708 else if (!strcmp (p, "-Wmissing-noreturn"))
709 warn_missing_noreturn = 1;
710 else if (!strcmp (p, "-Wno-missing-noreturn"))
711 warn_missing_noreturn = 0;
712 else if (!strcmp (p, "-Wmissing-format-attribute"))
713 warn_missing_format_attribute = 1;
714 else if (!strcmp (p, "-Wno-missing-format-attribute"))
715 warn_missing_format_attribute = 0;
716 else if (!strcmp (p, "-Wpointer-arith"))
717 warn_pointer_arith = 1;
718 else if (!strcmp (p, "-Wno-pointer-arith"))
719 warn_pointer_arith = 0;
720 else if (!strcmp (p, "-Wstrict-prototypes"))
721 warn_strict_prototypes = 1;
722 else if (!strcmp (p, "-Wno-strict-prototypes"))
723 warn_strict_prototypes = 0;
724 else if (!strcmp (p, "-Wmissing-prototypes"))
725 warn_missing_prototypes = 1;
726 else if (!strcmp (p, "-Wno-missing-prototypes"))
727 warn_missing_prototypes = 0;
728 else if (!strcmp (p, "-Wmissing-declarations"))
729 warn_missing_declarations = 1;
730 else if (!strcmp (p, "-Wno-missing-declarations"))
731 warn_missing_declarations = 0;
732 else if (!strcmp (p, "-Wredundant-decls"))
733 warn_redundant_decls = 1;
734 else if (!strcmp (p, "-Wno-redundant-decls"))
735 warn_redundant_decls = 0;
736 else if (!strcmp (p, "-Wnested-externs"))
737 warn_nested_externs = 1;
738 else if (!strcmp (p, "-Wno-nested-externs"))
739 warn_nested_externs = 0;
740 else if (!strcmp (p, "-Wtraditional"))
741 warn_traditional = 1;
742 else if (!strcmp (p, "-Wno-traditional"))
743 warn_traditional = 0;
744 else if (!strncmp (p, "-Wformat=", 9))
745 warn_format = atol (p + 9);
746 else if (!strcmp (p, "-Wformat"))
748 else if (!strcmp (p, "-Wno-format"))
750 else if (!strcmp (p, "-Wchar-subscripts"))
751 warn_char_subscripts = 1;
752 else if (!strcmp (p, "-Wno-char-subscripts"))
753 warn_char_subscripts = 0;
754 else if (!strcmp (p, "-Wconversion"))
756 else if (!strcmp (p, "-Wno-conversion"))
758 else if (!strcmp (p, "-Wparentheses"))
759 warn_parentheses = 1;
760 else if (!strcmp (p, "-Wno-parentheses"))
761 warn_parentheses = 0;
762 else if (!strcmp (p, "-Wreturn-type"))
763 warn_return_type = 1;
764 else if (!strcmp (p, "-Wno-return-type"))
765 warn_return_type = 0;
766 else if (!strcmp (p, "-Wsequence-point"))
767 warn_sequence_point = 1;
768 else if (!strcmp (p, "-Wno-sequence-point"))
769 warn_sequence_point = 0;
770 else if (!strcmp (p, "-Wcomment"))
771 ; /* cpp handles this one. */
772 else if (!strcmp (p, "-Wno-comment"))
773 ; /* cpp handles this one. */
774 else if (!strcmp (p, "-Wcomments"))
775 ; /* cpp handles this one. */
776 else if (!strcmp (p, "-Wno-comments"))
777 ; /* cpp handles this one. */
778 else if (!strcmp (p, "-Wtrigraphs"))
779 ; /* cpp handles this one. */
780 else if (!strcmp (p, "-Wno-trigraphs"))
781 ; /* cpp handles this one. */
782 else if (!strcmp (p, "-Wundef"))
783 ; /* cpp handles this one. */
784 else if (!strcmp (p, "-Wno-undef"))
785 ; /* cpp handles this one. */
786 else if (!strcmp (p, "-Wimport"))
787 ; /* cpp handles this one. */
788 else if (!strcmp (p, "-Wno-import"))
789 ; /* cpp handles this one. */
790 else if (!strcmp (p, "-Wmissing-braces"))
791 warn_missing_braces = 1;
792 else if (!strcmp (p, "-Wno-missing-braces"))
793 warn_missing_braces = 0;
794 else if (!strcmp (p, "-Wmain"))
796 else if (!strcmp (p, "-Wno-main"))
798 else if (!strcmp (p, "-Wsign-compare"))
799 warn_sign_compare = 1;
800 else if (!strcmp (p, "-Wno-sign-compare"))
801 warn_sign_compare = 0;
802 else if (!strcmp (p, "-Wfloat-equal"))
803 warn_float_equal = 1;
804 else if (!strcmp (p, "-Wno-float-equal"))
805 warn_float_equal = 0;
806 else if (!strcmp (p, "-Wmultichar"))
808 else if (!strcmp (p, "-Wno-multichar"))
810 else if (!strcmp (p, "-Wunknown-pragmas"))
811 /* Set to greater than 1, so that even unknown pragmas in system
812 headers will be warned about. */
813 warn_unknown_pragmas = 2;
814 else if (!strcmp (p, "-Wno-unknown-pragmas"))
815 warn_unknown_pragmas = 0;
816 else if (!strcmp (p, "-Wall"))
818 /* We save the value of warn_uninitialized, since if they put
819 -Wuninitialized on the command line, we need to generate a
820 warning about not using it without also specifying -O. */
821 if (warn_uninitialized != 1)
822 warn_uninitialized = 2;
823 warn_implicit_int = 1;
824 mesg_implicit_function_declaration = 1;
825 warn_return_type = 1;
829 warn_char_subscripts = 1;
830 warn_parentheses = 1;
831 warn_sequence_point = 1;
832 warn_missing_braces = 1;
833 /* We set this to 2 here, but 1 in -Wmain, so -ffreestanding can turn
834 it off only if it's not explicit. */
836 /* Only warn about unknown pragmas that are not in system headers. */
837 warn_unknown_pragmas = 1;
840 return strings_processed;
845 /* Hooks for print_node. */
848 print_lang_decl (file, node, indent)
849 FILE *file ATTRIBUTE_UNUSED;
850 tree node ATTRIBUTE_UNUSED;
851 int indent ATTRIBUTE_UNUSED;
856 print_lang_type (file, node, indent)
857 FILE *file ATTRIBUTE_UNUSED;
858 tree node ATTRIBUTE_UNUSED;
859 int indent ATTRIBUTE_UNUSED;
864 print_lang_identifier (file, node, indent)
869 print_node (file, "global", IDENTIFIER_GLOBAL_VALUE (node), indent + 4);
870 print_node (file, "local", IDENTIFIER_LOCAL_VALUE (node), indent + 4);
871 print_node (file, "label", IDENTIFIER_LABEL_VALUE (node), indent + 4);
872 print_node (file, "implicit", IDENTIFIER_IMPLICIT_DECL (node), indent + 4);
873 print_node (file, "error locus", IDENTIFIER_ERROR_LOCUS (node), indent + 4);
874 print_node (file, "limbo value", IDENTIFIER_LIMBO_VALUE (node), indent + 4);
875 if (C_IS_RESERVED_WORD (node))
877 tree rid = ridpointers[C_RID_CODE (node)];
878 indent_to (file, indent + 4);
879 fprintf (file, "rid ");
880 fprintf (file, HOST_PTR_PRINTF, (void *)rid);
881 fprintf (file, " \"%s\"", IDENTIFIER_POINTER (rid));
885 /* Hook called at end of compilation to assume 1 elt
886 for a top-level tentative array defn that wasn't complete before. */
889 finish_incomplete_decl (decl)
892 if (TREE_CODE (decl) == VAR_DECL)
894 tree type = TREE_TYPE (decl);
895 if (type != error_mark_node
896 && TREE_CODE (type) == ARRAY_TYPE
897 && ! DECL_EXTERNAL (decl)
898 && TYPE_DOMAIN (type) == 0)
900 warning_with_decl (decl, "array `%s' assumed to have one element");
902 complete_array_type (type, NULL_TREE, 1);
904 layout_decl (decl, 0);
909 /* Create a new `struct binding_level'. */
911 static struct binding_level *
912 make_binding_level ()
915 return (struct binding_level *) xmalloc (sizeof (struct binding_level));
918 /* Nonzero if we are currently in the global binding level. */
923 return current_binding_level == global_binding_level;
929 keep_next_level_flag = 1;
932 /* Nonzero if the current level needs to have a BLOCK made. */
937 return ((current_binding_level->keep_if_subblocks
938 && current_binding_level->blocks != 0)
939 || current_binding_level->keep
940 || current_binding_level->names != 0
941 || (current_binding_level->tags != 0
942 && !current_binding_level->tag_transparent));
945 /* Identify this binding level as a level of parameters.
946 DEFINITION_FLAG is 1 for a definition, 0 for a declaration.
947 But it turns out there is no way to pass the right value for
948 DEFINITION_FLAG, so we ignore it. */
951 declare_parm_level (definition_flag)
952 int definition_flag ATTRIBUTE_UNUSED;
954 current_binding_level->parm_flag = 1;
957 /* Nonzero if currently making parm declarations. */
962 return current_binding_level->parm_flag;
965 /* Enter a new binding level.
966 If TAG_TRANSPARENT is nonzero, do so only for the name space of variables,
967 not for that of tags. */
970 pushlevel (tag_transparent)
973 register struct binding_level *newlevel = NULL_BINDING_LEVEL;
975 /* If this is the top level of a function,
976 just make sure that NAMED_LABELS is 0. */
978 if (current_binding_level == global_binding_level)
983 /* Reuse or create a struct for this binding level. */
985 if (free_binding_level)
987 newlevel = free_binding_level;
988 free_binding_level = free_binding_level->level_chain;
992 newlevel = make_binding_level ();
995 /* Add this level to the front of the chain (stack) of levels that
998 *newlevel = clear_binding_level;
999 newlevel->tag_transparent
1001 || (current_binding_level
1002 ? current_binding_level->subblocks_tag_transparent
1004 newlevel->level_chain = current_binding_level;
1005 current_binding_level = newlevel;
1006 newlevel->keep = keep_next_level_flag;
1007 keep_next_level_flag = 0;
1008 newlevel->keep_if_subblocks = keep_next_if_subblocks;
1009 keep_next_if_subblocks = 0;
1012 /* Clear the limbo values of all identifiers defined in BLOCK or a subblock. */
1015 clear_limbo_values (block)
1020 for (tem = BLOCK_VARS (block); tem; tem = TREE_CHAIN (tem))
1021 if (DECL_NAME (tem) != 0)
1022 IDENTIFIER_LIMBO_VALUE (DECL_NAME (tem)) = 0;
1024 for (tem = BLOCK_SUBBLOCKS (block); tem; tem = TREE_CHAIN (tem))
1025 clear_limbo_values (tem);
1028 /* Exit a binding level.
1029 Pop the level off, and restore the state of the identifier-decl mappings
1030 that were in effect when this level was entered.
1032 If KEEP is nonzero, this level had explicit declarations, so
1033 and create a "block" (a BLOCK node) for the level
1034 to record its declarations and subblocks for symbol table output.
1036 If FUNCTIONBODY is nonzero, this level is the body of a function,
1037 so create a block as if KEEP were set and also clear out all
1040 If REVERSE is nonzero, reverse the order of decls before putting
1041 them into the BLOCK. */
1044 poplevel (keep, reverse, functionbody)
1050 /* The chain of decls was accumulated in reverse order.
1051 Put it into forward order, just for cleanliness. */
1053 tree tags = current_binding_level->tags;
1054 tree subblocks = current_binding_level->blocks;
1057 int block_previously_created;
1059 keep |= current_binding_level->keep;
1061 /* This warning is turned off because it causes warnings for
1062 declarations like `extern struct foo *x'. */
1064 /* Warn about incomplete structure types in this level. */
1065 for (link = tags; link; link = TREE_CHAIN (link))
1066 if (!COMPLETE_TYPE_P (TREE_VALUE (link)))
1068 tree type = TREE_VALUE (link);
1069 tree type_name = TYPE_NAME (type);
1070 char *id = IDENTIFIER_POINTER (TREE_CODE (type_name) == IDENTIFIER_NODE
1072 : DECL_NAME (type_name));
1073 switch (TREE_CODE (type))
1076 error ("`struct %s' incomplete in scope ending here", id);
1079 error ("`union %s' incomplete in scope ending here", id);
1082 error ("`enum %s' incomplete in scope ending here", id);
1088 /* Get the decls in the order they were written.
1089 Usually current_binding_level->names is in reverse order.
1090 But parameter decls were previously put in forward order. */
1093 current_binding_level->names
1094 = decls = nreverse (current_binding_level->names);
1096 decls = current_binding_level->names;
1098 /* Output any nested inline functions within this block
1099 if they weren't already output. */
1101 for (decl = decls; decl; decl = TREE_CHAIN (decl))
1102 if (TREE_CODE (decl) == FUNCTION_DECL
1103 && ! TREE_ASM_WRITTEN (decl)
1104 && DECL_INITIAL (decl) != 0
1105 && TREE_ADDRESSABLE (decl))
1107 /* If this decl was copied from a file-scope decl
1108 on account of a block-scope extern decl,
1109 propagate TREE_ADDRESSABLE to the file-scope decl.
1111 DECL_ABSTRACT_ORIGIN can be set to itself if warn_return_type is
1112 true, since then the decl goes through save_for_inline_copying. */
1113 if (DECL_ABSTRACT_ORIGIN (decl) != 0
1114 && DECL_ABSTRACT_ORIGIN (decl) != decl)
1115 TREE_ADDRESSABLE (DECL_ABSTRACT_ORIGIN (decl)) = 1;
1118 /* We used to warn about unused variables in expand_end_bindings,
1119 i.e. while generating RTL. But in function-at-a-time mode we may
1120 choose to never expand a function at all (e.g. auto inlining), so
1121 we do this explicitly now. */
1122 warn_about_unused_variables (getdecls ());
1124 /* If there were any declarations or structure tags in that level,
1125 or if this level is a function body,
1126 create a BLOCK to record them for the life of this function. */
1129 block_previously_created = (current_binding_level->this_block != 0);
1130 if (block_previously_created)
1131 block = current_binding_level->this_block;
1132 else if (keep || functionbody
1133 || (current_binding_level->keep_if_subblocks && subblocks != 0))
1134 block = make_node (BLOCK);
1137 BLOCK_VARS (block) = decls;
1138 BLOCK_SUBBLOCKS (block) = subblocks;
1141 /* In each subblock, record that this is its superior. */
1143 for (link = subblocks; link; link = TREE_CHAIN (link))
1144 BLOCK_SUPERCONTEXT (link) = block;
1146 /* Clear out the meanings of the local variables of this level. */
1148 for (link = decls; link; link = TREE_CHAIN (link))
1150 if (DECL_NAME (link) != 0)
1152 /* If the ident. was used or addressed via a local extern decl,
1153 don't forget that fact. */
1154 if (DECL_EXTERNAL (link))
1156 if (TREE_USED (link))
1157 TREE_USED (DECL_NAME (link)) = 1;
1158 if (TREE_ADDRESSABLE (link))
1159 TREE_ADDRESSABLE (DECL_ASSEMBLER_NAME (link)) = 1;
1161 IDENTIFIER_LOCAL_VALUE (DECL_NAME (link)) = 0;
1165 /* Restore all name-meanings of the outer levels
1166 that were shadowed by this level. */
1168 for (link = current_binding_level->shadowed; link; link = TREE_CHAIN (link))
1169 IDENTIFIER_LOCAL_VALUE (TREE_PURPOSE (link)) = TREE_VALUE (link);
1171 /* If the level being exited is the top level of a function,
1172 check over all the labels, and clear out the current
1173 (function local) meanings of their names. */
1177 clear_limbo_values (block);
1179 /* If this is the top level block of a function,
1180 the vars are the function's parameters.
1181 Don't leave them in the BLOCK because they are
1182 found in the FUNCTION_DECL instead. */
1184 BLOCK_VARS (block) = 0;
1186 /* Clear out the definitions of all label names,
1187 since their scopes end here,
1188 and add them to BLOCK_VARS. */
1190 for (link = named_labels; link; link = TREE_CHAIN (link))
1192 register tree label = TREE_VALUE (link);
1194 if (DECL_INITIAL (label) == 0)
1196 error_with_decl (label, "label `%s' used but not defined");
1197 /* Avoid crashing later. */
1198 define_label (input_filename, lineno,
1201 else if (warn_unused_label && !TREE_USED (label))
1202 warning_with_decl (label, "label `%s' defined but not used");
1203 IDENTIFIER_LABEL_VALUE (DECL_NAME (label)) = 0;
1205 /* Put the labels into the "variables" of the
1206 top-level block, so debugger can see them. */
1207 TREE_CHAIN (label) = BLOCK_VARS (block);
1208 BLOCK_VARS (block) = label;
1212 /* Pop the current level, and free the structure for reuse. */
1215 register struct binding_level *level = current_binding_level;
1216 current_binding_level = current_binding_level->level_chain;
1218 level->level_chain = free_binding_level;
1219 free_binding_level = level;
1222 /* Dispose of the block that we just made inside some higher level. */
1224 DECL_INITIAL (current_function_decl) = block;
1227 if (!block_previously_created)
1228 current_binding_level->blocks
1229 = chainon (current_binding_level->blocks, block);
1231 /* If we did not make a block for the level just exited,
1232 any blocks made for inner levels
1233 (since they cannot be recorded as subblocks in that level)
1234 must be carried forward so they will later become subblocks
1235 of something else. */
1237 current_binding_level->blocks
1238 = chainon (current_binding_level->blocks, subblocks);
1240 /* Set the TYPE_CONTEXTs for all of the tagged types belonging to this
1241 binding contour so that they point to the appropriate construct, i.e.
1242 either to the current FUNCTION_DECL node, or else to the BLOCK node
1243 we just constructed.
1245 Note that for tagged types whose scope is just the formal parameter
1246 list for some function type specification, we can't properly set
1247 their TYPE_CONTEXTs here, because we don't have a pointer to the
1248 appropriate FUNCTION_TYPE node readily available to us. For those
1249 cases, the TYPE_CONTEXTs of the relevant tagged type nodes get set
1250 in `grokdeclarator' as soon as we have created the FUNCTION_TYPE
1251 node which will represent the "scope" for these "parameter list local"
1255 for (link = tags; link; link = TREE_CHAIN (link))
1256 TYPE_CONTEXT (TREE_VALUE (link)) = current_function_decl;
1258 for (link = tags; link; link = TREE_CHAIN (link))
1259 TYPE_CONTEXT (TREE_VALUE (link)) = block;
1262 TREE_USED (block) = 1;
1267 /* Delete the node BLOCK from the current binding level.
1268 This is used for the block inside a stmt expr ({...})
1269 so that the block can be reinserted where appropriate. */
1272 delete_block (block)
1276 if (current_binding_level->blocks == block)
1277 current_binding_level->blocks = TREE_CHAIN (block);
1278 for (t = current_binding_level->blocks; t;)
1280 if (TREE_CHAIN (t) == block)
1281 TREE_CHAIN (t) = TREE_CHAIN (block);
1285 TREE_CHAIN (block) = NULL;
1286 /* Clear TREE_USED which is always set by poplevel.
1287 The flag is set again if insert_block is called. */
1288 TREE_USED (block) = 0;
1291 /* Insert BLOCK at the end of the list of subblocks of the
1292 current binding level. This is used when a BIND_EXPR is expanded,
1293 to handle the BLOCK node inside the BIND_EXPR. */
1296 insert_block (block)
1299 TREE_USED (block) = 1;
1300 current_binding_level->blocks
1301 = chainon (current_binding_level->blocks, block);
1304 /* Set the BLOCK node for the innermost scope
1305 (the one we are currently in). */
1309 register tree block;
1311 current_binding_level->this_block = block;
1317 register struct binding_level *newlevel;
1319 /* Reuse or create a struct for this binding level. */
1321 if (free_binding_level)
1323 newlevel = free_binding_level;
1324 free_binding_level = free_binding_level->level_chain;
1328 newlevel = make_binding_level ();
1331 /* Add this level to the front of the chain (stack) of label levels. */
1333 newlevel->level_chain = label_level_chain;
1334 label_level_chain = newlevel;
1336 newlevel->names = named_labels;
1337 newlevel->shadowed = shadowed_labels;
1339 shadowed_labels = 0;
1345 register struct binding_level *level = label_level_chain;
1348 /* Clear out the definitions of the declared labels in this level.
1349 Leave in the list any ordinary, non-declared labels. */
1350 for (link = named_labels, prev = 0; link;)
1352 if (C_DECLARED_LABEL_FLAG (TREE_VALUE (link)))
1354 if (DECL_SOURCE_LINE (TREE_VALUE (link)) == 0)
1356 error_with_decl (TREE_VALUE (link),
1357 "label `%s' used but not defined");
1358 /* Avoid crashing later. */
1359 define_label (input_filename, lineno,
1360 DECL_NAME (TREE_VALUE (link)));
1362 else if (warn_unused_label && !TREE_USED (TREE_VALUE (link)))
1363 warning_with_decl (TREE_VALUE (link),
1364 "label `%s' defined but not used");
1365 IDENTIFIER_LABEL_VALUE (DECL_NAME (TREE_VALUE (link))) = 0;
1367 /* Delete this element from the list. */
1368 link = TREE_CHAIN (link);
1370 TREE_CHAIN (prev) = link;
1372 named_labels = link;
1377 link = TREE_CHAIN (link);
1381 /* Bring back all the labels that were shadowed. */
1382 for (link = shadowed_labels; link; link = TREE_CHAIN (link))
1383 if (DECL_NAME (TREE_VALUE (link)) != 0)
1384 IDENTIFIER_LABEL_VALUE (DECL_NAME (TREE_VALUE (link)))
1385 = TREE_VALUE (link);
1387 named_labels = chainon (named_labels, level->names);
1388 shadowed_labels = level->shadowed;
1390 /* Pop the current level, and free the structure for reuse. */
1391 label_level_chain = label_level_chain->level_chain;
1392 level->level_chain = free_binding_level;
1393 free_binding_level = level;
1396 /* Push a definition or a declaration of struct, union or enum tag "name".
1397 "type" should be the type node.
1398 We assume that the tag "name" is not already defined.
1400 Note that the definition may really be just a forward reference.
1401 In that case, the TYPE_SIZE will be zero. */
1404 pushtag (name, type)
1407 register struct binding_level *b;
1409 /* Find the proper binding level for this type tag. */
1411 for (b = current_binding_level; b->tag_transparent; b = b->level_chain)
1416 /* Record the identifier as the type's name if it has none. */
1418 if (TYPE_NAME (type) == 0)
1419 TYPE_NAME (type) = name;
1422 b->tags = tree_cons (name, type, b->tags);
1424 /* Create a fake NULL-named TYPE_DECL node whose TREE_TYPE will be the
1425 tagged type we just added to the current binding level. This fake
1426 NULL-named TYPE_DECL node helps dwarfout.c to know when it needs
1427 to output a representation of a tagged type, and it also gives
1428 us a convenient place to record the "scope start" address for the
1431 TYPE_STUB_DECL (type) = pushdecl (build_decl (TYPE_DECL, NULL_TREE, type));
1433 /* An approximation for now, so we can tell this is a function-scope tag.
1434 This will be updated in poplevel. */
1435 TYPE_CONTEXT (type) = DECL_CONTEXT (TYPE_STUB_DECL (type));
1438 /* Handle when a new declaration NEWDECL
1439 has the same name as an old one OLDDECL
1440 in the same binding contour.
1441 Prints an error message if appropriate.
1443 If safely possible, alter OLDDECL to look like NEWDECL, and return 1.
1444 Otherwise, return 0.
1446 When DIFFERENT_BINDING_LEVEL is true, NEWDECL is an external declaration,
1447 and OLDDECL is in an outer binding level and should thus not be changed. */
1450 duplicate_decls (newdecl, olddecl, different_binding_level)
1451 register tree newdecl, olddecl;
1452 int different_binding_level;
1454 int types_match = comptypes (TREE_TYPE (newdecl), TREE_TYPE (olddecl));
1455 int new_is_definition = (TREE_CODE (newdecl) == FUNCTION_DECL
1456 && DECL_INITIAL (newdecl) != 0);
1457 tree oldtype = TREE_TYPE (olddecl);
1458 tree newtype = TREE_TYPE (newdecl);
1461 if (DECL_P (olddecl))
1462 DECL_MACHINE_ATTRIBUTES (newdecl)
1463 = merge_machine_decl_attributes (olddecl, newdecl);
1465 if (TREE_CODE (newtype) == ERROR_MARK
1466 || TREE_CODE (oldtype) == ERROR_MARK)
1469 /* New decl is completely inconsistent with the old one =>
1470 tell caller to replace the old one.
1471 This is always an error except in the case of shadowing a builtin. */
1472 if (TREE_CODE (olddecl) != TREE_CODE (newdecl))
1474 if (TREE_CODE (olddecl) == FUNCTION_DECL
1475 && (DECL_BUILT_IN (olddecl)
1476 || DECL_BUILT_IN_NONANSI (olddecl)))
1478 /* If you declare a built-in or predefined function name as static,
1479 the old definition is overridden,
1480 but optionally warn this was a bad choice of name. */
1481 if (!TREE_PUBLIC (newdecl))
1485 else if (DECL_BUILT_IN (olddecl))
1486 warning_with_decl (newdecl, "shadowing built-in function `%s'");
1488 warning_with_decl (newdecl, "shadowing library function `%s'");
1490 /* Likewise, if the built-in is not ansi, then programs can
1491 override it even globally without an error. */
1492 else if (! DECL_BUILT_IN (olddecl))
1493 warning_with_decl (newdecl,
1494 "library function `%s' declared as non-function");
1496 else if (DECL_BUILT_IN_NONANSI (olddecl))
1497 warning_with_decl (newdecl,
1498 "built-in function `%s' declared as non-function");
1500 warning_with_decl (newdecl,
1501 "built-in function `%s' declared as non-function");
1505 error_with_decl (newdecl, "`%s' redeclared as different kind of symbol");
1506 error_with_decl (olddecl, "previous declaration of `%s'");
1512 /* For real parm decl following a forward decl,
1513 return 1 so old decl will be reused. */
1514 if (types_match && TREE_CODE (newdecl) == PARM_DECL
1515 && TREE_ASM_WRITTEN (olddecl) && ! TREE_ASM_WRITTEN (newdecl))
1518 /* The new declaration is the same kind of object as the old one.
1519 The declarations may partially match. Print warnings if they don't
1520 match enough. Ultimately, copy most of the information from the new
1521 decl to the old one, and keep using the old one. */
1523 if (flag_traditional && TREE_CODE (newdecl) == FUNCTION_DECL
1524 && IDENTIFIER_IMPLICIT_DECL (DECL_NAME (newdecl)) == olddecl
1525 && DECL_INITIAL (olddecl) == 0)
1526 /* If -traditional, avoid error for redeclaring fcn
1527 after implicit decl. */
1529 else if (TREE_CODE (olddecl) == FUNCTION_DECL
1530 && DECL_BUILT_IN (olddecl))
1532 /* A function declaration for a built-in function. */
1533 if (!TREE_PUBLIC (newdecl))
1535 /* If you declare a built-in function name as static, the
1536 built-in definition is overridden,
1537 but optionally warn this was a bad choice of name. */
1539 warning_with_decl (newdecl, "shadowing built-in function `%s'");
1540 /* Discard the old built-in function. */
1543 else if (!types_match)
1545 /* Accept the return type of the new declaration if same modes. */
1546 tree oldreturntype = TREE_TYPE (oldtype);
1547 tree newreturntype = TREE_TYPE (newtype);
1549 if (TYPE_MODE (oldreturntype) == TYPE_MODE (newreturntype))
1551 /* Function types may be shared, so we can't just modify
1552 the return type of olddecl's function type. */
1554 = build_function_type (newreturntype,
1555 TYPE_ARG_TYPES (oldtype));
1557 types_match = comptypes (newtype, trytype);
1561 /* Accept harmless mismatch in first argument type also.
1563 if (TYPE_ARG_TYPES (TREE_TYPE (newdecl)) != 0
1564 && TYPE_ARG_TYPES (oldtype) != 0
1565 && TREE_VALUE (TYPE_ARG_TYPES (newtype)) != 0
1566 && TREE_VALUE (TYPE_ARG_TYPES (oldtype)) != 0
1567 && (TYPE_MODE (TREE_VALUE (TYPE_ARG_TYPES (newtype)))
1568 == TYPE_MODE (TREE_VALUE (TYPE_ARG_TYPES (oldtype)))))
1570 /* Function types may be shared, so we can't just modify
1571 the return type of olddecl's function type. */
1573 = build_function_type (TREE_TYPE (oldtype),
1574 tree_cons (NULL_TREE,
1575 TREE_VALUE (TYPE_ARG_TYPES (newtype)),
1576 TREE_CHAIN (TYPE_ARG_TYPES (oldtype))));
1578 types_match = comptypes (newtype, trytype);
1582 if (! different_binding_level)
1583 TREE_TYPE (olddecl) = oldtype;
1587 /* If types don't match for a built-in, throw away the built-in. */
1588 warning_with_decl (newdecl, "conflicting types for built-in function `%s'");
1592 else if (TREE_CODE (olddecl) == FUNCTION_DECL
1593 && DECL_SOURCE_LINE (olddecl) == 0)
1595 /* A function declaration for a predeclared function
1596 that isn't actually built in. */
1597 if (!TREE_PUBLIC (newdecl))
1599 /* If you declare it as static, the
1600 default definition is overridden. */
1603 else if (!types_match)
1605 /* If the types don't match, preserve volatility indication.
1606 Later on, we will discard everything else about the
1607 default declaration. */
1608 TREE_THIS_VOLATILE (newdecl) |= TREE_THIS_VOLATILE (olddecl);
1611 /* Permit char *foo () to match void *foo (...) if not pedantic,
1612 if one of them came from a system header file. */
1613 else if (!types_match
1614 && TREE_CODE (olddecl) == FUNCTION_DECL
1615 && TREE_CODE (newdecl) == FUNCTION_DECL
1616 && TREE_CODE (TREE_TYPE (oldtype)) == POINTER_TYPE
1617 && TREE_CODE (TREE_TYPE (newtype)) == POINTER_TYPE
1618 && (DECL_IN_SYSTEM_HEADER (olddecl)
1619 || DECL_IN_SYSTEM_HEADER (newdecl))
1620 && ((TYPE_MAIN_VARIANT (TREE_TYPE (TREE_TYPE (newtype))) == void_type_node
1621 && TYPE_ARG_TYPES (oldtype) == 0
1622 && self_promoting_args_p (TYPE_ARG_TYPES (newtype))
1623 && TREE_TYPE (TREE_TYPE (oldtype)) == char_type_node)
1625 (TREE_TYPE (TREE_TYPE (newtype)) == char_type_node
1626 && TYPE_ARG_TYPES (newtype) == 0
1627 && self_promoting_args_p (TYPE_ARG_TYPES (oldtype))
1628 && TYPE_MAIN_VARIANT (TREE_TYPE (TREE_TYPE (oldtype))) == void_type_node)))
1631 pedwarn_with_decl (newdecl, "conflicting types for `%s'");
1632 /* Make sure we keep void * as ret type, not char *. */
1633 if (TYPE_MAIN_VARIANT (TREE_TYPE (TREE_TYPE (oldtype))) == void_type_node)
1634 TREE_TYPE (newdecl) = newtype = oldtype;
1636 /* Set DECL_IN_SYSTEM_HEADER, so that if we see another declaration
1637 we will come back here again. */
1638 DECL_IN_SYSTEM_HEADER (newdecl) = 1;
1640 else if (!types_match
1641 /* Permit char *foo (int, ...); followed by char *foo ();
1643 && ! (TREE_CODE (olddecl) == FUNCTION_DECL
1645 /* Return types must still match. */
1646 && comptypes (TREE_TYPE (oldtype),
1647 TREE_TYPE (newtype))
1648 && TYPE_ARG_TYPES (newtype) == 0))
1650 error_with_decl (newdecl, "conflicting types for `%s'");
1651 /* Check for function type mismatch
1652 involving an empty arglist vs a nonempty one. */
1653 if (TREE_CODE (olddecl) == FUNCTION_DECL
1654 && comptypes (TREE_TYPE (oldtype),
1655 TREE_TYPE (newtype))
1656 && ((TYPE_ARG_TYPES (oldtype) == 0
1657 && DECL_INITIAL (olddecl) == 0)
1659 (TYPE_ARG_TYPES (newtype) == 0
1660 && DECL_INITIAL (newdecl) == 0)))
1662 /* Classify the problem further. */
1663 register tree t = TYPE_ARG_TYPES (oldtype);
1665 t = TYPE_ARG_TYPES (newtype);
1666 for (; t; t = TREE_CHAIN (t))
1668 register tree type = TREE_VALUE (t);
1670 if (TREE_CHAIN (t) == 0
1671 && TYPE_MAIN_VARIANT (type) != void_type_node)
1673 error ("A parameter list with an ellipsis can't match an empty parameter name list declaration.");
1677 if (simple_type_promotes_to (type) != NULL_TREE)
1679 error ("An argument type that has a default promotion can't match an empty parameter name list declaration.");
1684 error_with_decl (olddecl, "previous declaration of `%s'");
1688 errmsg = redeclaration_error_message (newdecl, olddecl);
1694 error_with_decl (newdecl, "redefinition of `%s'");
1697 error_with_decl (newdecl, "redeclaration of `%s'");
1700 error_with_decl (newdecl, "conflicting declarations of `%s'");
1706 error_with_decl (olddecl,
1707 ((DECL_INITIAL (olddecl)
1708 && current_binding_level == global_binding_level)
1709 ? "`%s' previously defined here"
1710 : "`%s' previously declared here"));
1712 else if (TREE_CODE (newdecl) == TYPE_DECL
1713 && (DECL_IN_SYSTEM_HEADER (olddecl)
1714 || DECL_IN_SYSTEM_HEADER (newdecl)))
1716 warning_with_decl (newdecl, "redefinition of `%s'");
1719 ((DECL_INITIAL (olddecl)
1720 && current_binding_level == global_binding_level)
1721 ? "`%s' previously defined here"
1722 : "`%s' previously declared here"));
1724 else if (TREE_CODE (olddecl) == FUNCTION_DECL
1725 && DECL_INITIAL (olddecl) != 0
1726 && TYPE_ARG_TYPES (oldtype) == 0
1727 && TYPE_ARG_TYPES (newtype) != 0
1728 && TYPE_ACTUAL_ARG_TYPES (oldtype) != 0)
1730 register tree type, parm;
1732 /* Prototype decl follows defn w/o prototype. */
1734 for (parm = TYPE_ACTUAL_ARG_TYPES (oldtype),
1735 type = TYPE_ARG_TYPES (newtype),
1738 parm = TREE_CHAIN (parm), type = TREE_CHAIN (type), nargs++)
1740 if (TYPE_MAIN_VARIANT (TREE_VALUE (parm)) == void_type_node
1741 && TYPE_MAIN_VARIANT (TREE_VALUE (type)) == void_type_node)
1743 warning_with_decl (newdecl, "prototype for `%s' follows");
1744 warning_with_decl (olddecl, "non-prototype definition here");
1747 if (TYPE_MAIN_VARIANT (TREE_VALUE (parm)) == void_type_node
1748 || TYPE_MAIN_VARIANT (TREE_VALUE (type)) == void_type_node)
1750 error_with_decl (newdecl,
1751 "prototype for `%s' follows and number of arguments doesn't match");
1752 error_with_decl (olddecl, "non-prototype definition here");
1756 /* Type for passing arg must be consistent
1757 with that declared for the arg. */
1758 if (! comptypes (TREE_VALUE (parm), TREE_VALUE (type))
1759 /* If -traditional, allow `unsigned int' instead of `int'
1760 in the prototype. */
1761 && (! (flag_traditional
1762 && TYPE_MAIN_VARIANT (TREE_VALUE (parm)) == integer_type_node
1763 && TYPE_MAIN_VARIANT (TREE_VALUE (type)) == unsigned_type_node)))
1765 error_with_decl (newdecl,
1766 "prototype for `%s' follows and argument %d doesn't match",
1768 error_with_decl (olddecl, "non-prototype definition here");
1774 /* Warn about mismatches in various flags. */
1777 /* Warn if function is now inline
1778 but was previously declared not inline and has been called. */
1779 if (TREE_CODE (olddecl) == FUNCTION_DECL
1780 && ! DECL_INLINE (olddecl) && DECL_INLINE (newdecl)
1781 && TREE_USED (olddecl))
1782 warning_with_decl (newdecl,
1783 "`%s' declared inline after being called");
1784 if (TREE_CODE (olddecl) == FUNCTION_DECL
1785 && ! DECL_INLINE (olddecl) && DECL_INLINE (newdecl)
1786 && DECL_INITIAL (olddecl) != 0)
1787 warning_with_decl (newdecl,
1788 "`%s' declared inline after its definition");
1790 /* If pedantic, warn when static declaration follows a non-static
1791 declaration. Otherwise, do so only for functions. */
1792 if ((pedantic || TREE_CODE (olddecl) == FUNCTION_DECL)
1793 && TREE_PUBLIC (olddecl)
1794 && !TREE_PUBLIC (newdecl))
1795 warning_with_decl (newdecl, "static declaration for `%s' follows non-static");
1797 /* If warn_traditional, warn when a non-static function
1798 declaration follows a static one. */
1799 if (warn_traditional && !in_system_header
1800 && TREE_CODE (olddecl) == FUNCTION_DECL
1801 && !TREE_PUBLIC (olddecl)
1802 && TREE_PUBLIC (newdecl))
1803 warning_with_decl (newdecl, "non-static declaration for `%s' follows static");
1805 /* Warn when const declaration follows a non-const
1806 declaration, but not for functions. */
1807 if (TREE_CODE (olddecl) != FUNCTION_DECL
1808 && !TREE_READONLY (olddecl)
1809 && TREE_READONLY (newdecl))
1810 warning_with_decl (newdecl, "const declaration for `%s' follows non-const");
1811 /* These bits are logically part of the type, for variables.
1812 But not for functions
1813 (where qualifiers are not valid ANSI anyway). */
1814 else if (pedantic && TREE_CODE (olddecl) != FUNCTION_DECL
1815 && (TREE_READONLY (newdecl) != TREE_READONLY (olddecl)
1816 || TREE_THIS_VOLATILE (newdecl) != TREE_THIS_VOLATILE (olddecl)))
1817 pedwarn_with_decl (newdecl, "type qualifiers for `%s' conflict with previous decl");
1821 /* Optionally warn about more than one declaration for the same name. */
1822 if (errmsg == 0 && warn_redundant_decls && DECL_SOURCE_LINE (olddecl) != 0
1823 /* Don't warn about a function declaration
1824 followed by a definition. */
1825 && !(TREE_CODE (newdecl) == FUNCTION_DECL && DECL_INITIAL (newdecl) != 0
1826 && DECL_INITIAL (olddecl) == 0)
1827 /* Don't warn about extern decl followed by (tentative) definition. */
1828 && !(DECL_EXTERNAL (olddecl) && ! DECL_EXTERNAL (newdecl)))
1830 warning_with_decl (newdecl, "redundant redeclaration of `%s' in same scope");
1831 warning_with_decl (olddecl, "previous declaration of `%s'");
1834 /* Copy all the DECL_... slots specified in the new decl
1835 except for any that we copy here from the old type.
1837 Past this point, we don't change OLDTYPE and NEWTYPE
1838 even if we change the types of NEWDECL and OLDDECL. */
1842 /* When copying info to olddecl, we store into write_olddecl
1843 instead. This allows us to avoid modifying olddecl when
1844 different_binding_level is true. */
1845 tree write_olddecl = different_binding_level ? newdecl : olddecl;
1847 /* Merge the data types specified in the two decls. */
1848 if (TREE_CODE (newdecl) != FUNCTION_DECL || !DECL_BUILT_IN (olddecl))
1850 if (different_binding_level)
1852 = build_type_attribute_variant
1854 merge_attributes (TYPE_ATTRIBUTES (newtype),
1855 TYPE_ATTRIBUTES (oldtype)));
1858 = TREE_TYPE (olddecl)
1859 = common_type (newtype, oldtype);
1862 /* Lay the type out, unless already done. */
1863 if (oldtype != TREE_TYPE (newdecl))
1865 if (TREE_TYPE (newdecl) != error_mark_node)
1866 layout_type (TREE_TYPE (newdecl));
1867 if (TREE_CODE (newdecl) != FUNCTION_DECL
1868 && TREE_CODE (newdecl) != TYPE_DECL
1869 && TREE_CODE (newdecl) != CONST_DECL)
1870 layout_decl (newdecl, 0);
1874 /* Since the type is OLDDECL's, make OLDDECL's size go with. */
1875 DECL_SIZE (newdecl) = DECL_SIZE (olddecl);
1876 DECL_SIZE_UNIT (newdecl) = DECL_SIZE_UNIT (olddecl);
1877 DECL_MODE (newdecl) = DECL_MODE (olddecl);
1878 if (TREE_CODE (olddecl) != FUNCTION_DECL)
1879 if (DECL_ALIGN (olddecl) > DECL_ALIGN (newdecl))
1881 DECL_ALIGN (newdecl) = DECL_ALIGN (olddecl);
1882 DECL_USER_ALIGN (newdecl) |= DECL_ALIGN (olddecl);
1886 /* Keep the old rtl since we can safely use it. */
1887 DECL_RTL (newdecl) = DECL_RTL (olddecl);
1889 /* Merge the type qualifiers. */
1890 if (TREE_CODE (olddecl) == FUNCTION_DECL
1891 && DECL_BUILT_IN_NONANSI (olddecl) && TREE_THIS_VOLATILE (olddecl)
1892 && ! TREE_THIS_VOLATILE (newdecl))
1893 TREE_THIS_VOLATILE (write_olddecl) = 0;
1895 if (TREE_READONLY (newdecl))
1896 TREE_READONLY (write_olddecl) = 1;
1898 if (TREE_THIS_VOLATILE (newdecl))
1900 TREE_THIS_VOLATILE (write_olddecl) = 1;
1901 if (TREE_CODE (newdecl) == VAR_DECL
1902 /* If an automatic variable is re-declared in the same
1903 function scope, but the old declaration was not
1904 volatile, make_var_volatile() would crash because the
1905 variable would have been assigned to a pseudo, not a
1906 MEM. Since this duplicate declaration is invalid
1907 anyway, we just skip the call. */
1909 make_var_volatile (newdecl);
1912 /* Keep source location of definition rather than declaration. */
1913 /* When called with different_binding_level set, keep the old
1914 information so that meaningful diagnostics can be given. */
1915 if (DECL_INITIAL (newdecl) == 0 && DECL_INITIAL (olddecl) != 0
1916 && ! different_binding_level)
1918 DECL_SOURCE_LINE (newdecl) = DECL_SOURCE_LINE (olddecl);
1919 DECL_SOURCE_FILE (newdecl) = DECL_SOURCE_FILE (olddecl);
1922 /* Merge the unused-warning information. */
1923 if (DECL_IN_SYSTEM_HEADER (olddecl))
1924 DECL_IN_SYSTEM_HEADER (newdecl) = 1;
1925 else if (DECL_IN_SYSTEM_HEADER (newdecl))
1926 DECL_IN_SYSTEM_HEADER (write_olddecl) = 1;
1928 /* Merge the initialization information. */
1929 /* When called with different_binding_level set, don't copy over
1930 DECL_INITIAL, so that we don't accidentally change function
1931 declarations into function definitions. */
1932 if (DECL_INITIAL (newdecl) == 0 && ! different_binding_level)
1933 DECL_INITIAL (newdecl) = DECL_INITIAL (olddecl);
1935 /* Merge the section attribute.
1936 We want to issue an error if the sections conflict but that must be
1937 done later in decl_attributes since we are called before attributes
1939 if (DECL_SECTION_NAME (newdecl) == NULL_TREE)
1940 DECL_SECTION_NAME (newdecl) = DECL_SECTION_NAME (olddecl);
1942 /* Copy the assembler name.
1943 Currently, it can only be defined in the prototype. */
1944 DECL_ASSEMBLER_NAME (newdecl) = DECL_ASSEMBLER_NAME (olddecl);
1946 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1948 DECL_STATIC_CONSTRUCTOR(newdecl) |= DECL_STATIC_CONSTRUCTOR(olddecl);
1949 DECL_STATIC_DESTRUCTOR (newdecl) |= DECL_STATIC_DESTRUCTOR (olddecl);
1951 DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (newdecl)
1952 |= DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (olddecl);
1953 DECL_NO_CHECK_MEMORY_USAGE (newdecl)
1954 |= DECL_NO_CHECK_MEMORY_USAGE (olddecl);
1955 DECL_NO_LIMIT_STACK (newdecl)
1956 |= DECL_NO_LIMIT_STACK (olddecl);
1959 /* If cannot merge, then use the new type and qualifiers,
1960 and don't preserve the old rtl. */
1961 else if (! different_binding_level)
1963 TREE_TYPE (olddecl) = TREE_TYPE (newdecl);
1964 TREE_READONLY (olddecl) = TREE_READONLY (newdecl);
1965 TREE_THIS_VOLATILE (olddecl) = TREE_THIS_VOLATILE (newdecl);
1966 TREE_SIDE_EFFECTS (olddecl) = TREE_SIDE_EFFECTS (newdecl);
1969 /* Merge the storage class information. */
1970 DECL_WEAK (newdecl) |= DECL_WEAK (olddecl);
1971 /* For functions, static overrides non-static. */
1972 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1974 TREE_PUBLIC (newdecl) &= TREE_PUBLIC (olddecl);
1975 /* This is since we don't automatically
1976 copy the attributes of NEWDECL into OLDDECL. */
1977 /* No need to worry about different_binding_level here because
1978 then TREE_PUBLIC (newdecl) was true. */
1979 TREE_PUBLIC (olddecl) = TREE_PUBLIC (newdecl);
1980 /* If this clears `static', clear it in the identifier too. */
1981 if (! TREE_PUBLIC (olddecl))
1982 TREE_PUBLIC (DECL_NAME (olddecl)) = 0;
1984 if (DECL_EXTERNAL (newdecl))
1986 if (! different_binding_level)
1988 /* Don't mess with these flags on local externs; they remain
1989 external even if there's a declaration at file scope which
1991 TREE_STATIC (newdecl) = TREE_STATIC (olddecl);
1992 DECL_EXTERNAL (newdecl) = DECL_EXTERNAL (olddecl);
1994 /* An extern decl does not override previous storage class. */
1995 TREE_PUBLIC (newdecl) = TREE_PUBLIC (olddecl);
1996 if (! DECL_EXTERNAL (newdecl))
1997 DECL_CONTEXT (newdecl) = DECL_CONTEXT (olddecl);
2001 TREE_STATIC (olddecl) = TREE_STATIC (newdecl);
2002 TREE_PUBLIC (olddecl) = TREE_PUBLIC (newdecl);
2005 if (TREE_CODE (newdecl) == FUNCTION_DECL)
2007 /* If either decl says `inline', this fn is inline,
2008 unless its definition was passed already. */
2009 if (DECL_INLINE (newdecl) && DECL_INITIAL (olddecl) == 0)
2010 DECL_INLINE (olddecl) = 1;
2012 DECL_INLINE (newdecl) = DECL_INLINE (olddecl);
2014 if (DECL_BUILT_IN (olddecl))
2016 /* Get rid of any built-in function if new arg types don't match it
2017 or if we have a function definition. */
2018 if (! types_match || new_is_definition)
2020 if (! different_binding_level)
2022 TREE_TYPE (olddecl) = TREE_TYPE (newdecl);
2023 DECL_BUILT_IN_CLASS (olddecl) = NOT_BUILT_IN;
2028 /* If redeclaring a builtin function, and not a definition,
2029 it stays built in. */
2030 DECL_BUILT_IN_CLASS (newdecl) = DECL_BUILT_IN_CLASS (olddecl);
2031 DECL_FUNCTION_CODE (newdecl) = DECL_FUNCTION_CODE (olddecl);
2034 /* Also preserve various other info from the definition. */
2035 else if (! new_is_definition)
2036 DECL_FRAME_SIZE (newdecl) = DECL_FRAME_SIZE (olddecl);
2037 if (! new_is_definition)
2039 DECL_RESULT (newdecl) = DECL_RESULT (olddecl);
2040 /* When called with different_binding_level set, don't copy over
2041 DECL_INITIAL, so that we don't accidentally change function
2042 declarations into function definitions. */
2043 if (! different_binding_level)
2044 DECL_INITIAL (newdecl) = DECL_INITIAL (olddecl);
2045 DECL_SAVED_INSNS (newdecl) = DECL_SAVED_INSNS (olddecl);
2046 DECL_ARGUMENTS (newdecl) = DECL_ARGUMENTS (olddecl);
2047 if (DECL_INLINE (newdecl))
2048 DECL_ABSTRACT_ORIGIN (newdecl) = DECL_ABSTRACT_ORIGIN (olddecl);
2051 if (different_binding_level)
2054 /* Copy most of the decl-specific fields of NEWDECL into OLDDECL.
2055 But preserve OLDDECL's DECL_UID. */
2057 register unsigned olddecl_uid = DECL_UID (olddecl);
2059 memcpy ((char *) olddecl + sizeof (struct tree_common),
2060 (char *) newdecl + sizeof (struct tree_common),
2061 sizeof (struct tree_decl) - sizeof (struct tree_common));
2062 DECL_UID (olddecl) = olddecl_uid;
2065 /* NEWDECL contains the merged attribute lists.
2066 Update OLDDECL to be the same. */
2067 DECL_MACHINE_ATTRIBUTES (olddecl) = DECL_MACHINE_ATTRIBUTES (newdecl);
2072 /* Record a decl-node X as belonging to the current lexical scope.
2073 Check for errors (such as an incompatible declaration for the same
2074 name already seen in the same scope).
2076 Returns either X or an old decl for the same name.
2077 If an old decl is returned, it may have been smashed
2078 to agree with what X says. */
2085 register tree name = DECL_NAME (x);
2086 register struct binding_level *b = current_binding_level;
2088 DECL_CONTEXT (x) = current_function_decl;
2089 /* A local extern declaration for a function doesn't constitute nesting.
2090 A local auto declaration does, since it's a forward decl
2091 for a nested function coming later. */
2092 if ((TREE_CODE (x) == FUNCTION_DECL || TREE_CODE (x) == VAR_DECL)
2093 && DECL_INITIAL (x) == 0 && DECL_EXTERNAL (x))
2094 DECL_CONTEXT (x) = 0;
2096 if (warn_nested_externs && DECL_EXTERNAL (x) && b != global_binding_level
2097 && x != IDENTIFIER_IMPLICIT_DECL (name)
2098 /* Don't print error messages for __FUNCTION__ and __PRETTY_FUNCTION__ */
2099 && !DECL_IN_SYSTEM_HEADER (x))
2100 warning ("nested extern declaration of `%s'", IDENTIFIER_POINTER (name));
2106 int different_binding_level = 0;
2108 t = lookup_name_current_level (name);
2109 /* Don't type check externs here when -traditional. This is so that
2110 code with conflicting declarations inside blocks will get warnings
2111 not errors. X11 for instance depends on this. */
2112 if (! t && DECL_EXTERNAL (x) && TREE_PUBLIC (x) && ! flag_traditional)
2114 t = IDENTIFIER_GLOBAL_VALUE (name);
2115 /* Type decls at global scope don't conflict with externs declared
2116 inside lexical blocks. */
2117 if (t && TREE_CODE (t) == TYPE_DECL)
2119 different_binding_level = 1;
2121 if (t != 0 && t == error_mark_node)
2122 /* error_mark_node is 0 for a while during initialization! */
2125 error_with_decl (x, "`%s' used prior to declaration");
2130 file = DECL_SOURCE_FILE (t);
2131 line = DECL_SOURCE_LINE (t);
2134 /* If this decl is `static' and an implicit decl was seen previously,
2135 warn. But don't complain if -traditional,
2136 since traditional compilers don't complain. */
2137 if (! flag_traditional && TREE_PUBLIC (name)
2138 /* Don't test for DECL_EXTERNAL, because grokdeclarator
2139 sets this for all functions. */
2140 && ! TREE_PUBLIC (x)
2141 && (TREE_CODE (x) == FUNCTION_DECL || b == global_binding_level)
2142 /* We used to warn also for explicit extern followed by static,
2143 but sometimes you need to do it that way. */
2144 && IDENTIFIER_IMPLICIT_DECL (name) != 0)
2146 pedwarn ("`%s' was declared implicitly `extern' and later `static'",
2147 IDENTIFIER_POINTER (name));
2148 pedwarn_with_file_and_line
2149 (DECL_SOURCE_FILE (IDENTIFIER_IMPLICIT_DECL (name)),
2150 DECL_SOURCE_LINE (IDENTIFIER_IMPLICIT_DECL (name)),
2151 "previous declaration of `%s'",
2152 IDENTIFIER_POINTER (name));
2153 TREE_THIS_VOLATILE (name) = 1;
2156 if (t != 0 && duplicate_decls (x, t, different_binding_level))
2158 if (TREE_CODE (t) == PARM_DECL)
2160 /* Don't allow more than one "real" duplicate
2161 of a forward parm decl. */
2162 TREE_ASM_WRITTEN (t) = TREE_ASM_WRITTEN (x);
2168 /* If we are processing a typedef statement, generate a whole new
2169 ..._TYPE node (which will be just an variant of the existing
2170 ..._TYPE node with identical properties) and then install the
2171 TYPE_DECL node generated to represent the typedef name as the
2172 TYPE_NAME of this brand new (duplicate) ..._TYPE node.
2174 The whole point here is to end up with a situation where each
2175 and every ..._TYPE node the compiler creates will be uniquely
2176 associated with AT MOST one node representing a typedef name.
2177 This way, even though the compiler substitutes corresponding
2178 ..._TYPE nodes for TYPE_DECL (i.e. "typedef name") nodes very
2179 early on, later parts of the compiler can always do the reverse
2180 translation and get back the corresponding typedef name. For
2183 typedef struct S MY_TYPE;
2186 Later parts of the compiler might only know that `object' was of
2187 type `struct S' if it were not for code just below. With this
2188 code however, later parts of the compiler see something like:
2190 struct S' == struct S
2191 typedef struct S' MY_TYPE;
2194 And they can then deduce (from the node for type struct S') that
2195 the original object declaration was:
2199 Being able to do this is important for proper support of protoize,
2200 and also for generating precise symbolic debugging information
2201 which takes full account of the programmer's (typedef) vocabulary.
2203 Obviously, we don't want to generate a duplicate ..._TYPE node if
2204 the TYPE_DECL node that we are now processing really represents a
2205 standard built-in type.
2207 Since all standard types are effectively declared at line zero
2208 in the source file, we can easily check to see if we are working
2209 on a standard type by checking the current value of lineno. */
2211 if (TREE_CODE (x) == TYPE_DECL)
2213 if (DECL_SOURCE_LINE (x) == 0)
2215 if (TYPE_NAME (TREE_TYPE (x)) == 0)
2216 TYPE_NAME (TREE_TYPE (x)) = x;
2218 else if (TREE_TYPE (x) != error_mark_node
2219 && DECL_ORIGINAL_TYPE (x) == NULL_TREE)
2221 tree tt = TREE_TYPE (x);
2222 DECL_ORIGINAL_TYPE (x) = tt;
2223 tt = build_type_copy (tt);
2225 TREE_USED (tt) = TREE_USED (x);
2230 /* Multiple external decls of the same identifier ought to match.
2231 Check against both global declarations (when traditional) and out of
2232 scope (limbo) block level declarations.
2234 We get warnings about inline functions where they are defined.
2235 Avoid duplicate warnings where they are used. */
2237 && ! (TREE_CODE (x) == FUNCTION_DECL && DECL_INLINE (x)))
2241 if (flag_traditional && IDENTIFIER_GLOBAL_VALUE (name) != 0
2242 && (DECL_EXTERNAL (IDENTIFIER_GLOBAL_VALUE (name))
2243 || TREE_PUBLIC (IDENTIFIER_GLOBAL_VALUE (name))))
2244 decl = IDENTIFIER_GLOBAL_VALUE (name);
2245 else if (IDENTIFIER_LIMBO_VALUE (name) != 0)
2246 /* Decls in limbo are always extern, so no need to check that. */
2247 decl = IDENTIFIER_LIMBO_VALUE (name);
2251 if (decl && ! comptypes (TREE_TYPE (x), TREE_TYPE (decl))
2252 /* If old decl is built-in, we already warned if we should. */
2253 && !DECL_BUILT_IN (decl))
2255 pedwarn_with_decl (x,
2256 "type mismatch with previous external decl");
2257 pedwarn_with_decl (decl, "previous external decl of `%s'");
2261 /* If a function has had an implicit declaration, and then is defined,
2262 make sure they are compatible. */
2264 if (IDENTIFIER_IMPLICIT_DECL (name) != 0
2265 && IDENTIFIER_GLOBAL_VALUE (name) == 0
2266 && TREE_CODE (x) == FUNCTION_DECL
2267 && ! comptypes (TREE_TYPE (x),
2268 TREE_TYPE (IDENTIFIER_IMPLICIT_DECL (name))))
2270 warning_with_decl (x, "type mismatch with previous implicit declaration");
2271 warning_with_decl (IDENTIFIER_IMPLICIT_DECL (name),
2272 "previous implicit declaration of `%s'");
2275 /* In PCC-compatibility mode, extern decls of vars with no current decl
2276 take effect at top level no matter where they are. */
2277 if (flag_traditional && DECL_EXTERNAL (x)
2278 && lookup_name (name) == 0)
2280 tree type = TREE_TYPE (x);
2282 /* But don't do this if the type contains temporary nodes. */
2285 if (type == error_mark_node)
2287 if (TYPE_CONTEXT (type))
2289 warning_with_decl (x, "type of external `%s' is not global");
2290 /* By exiting the loop early, we leave TYPE nonzero,
2291 and thus prevent globalization of the decl. */
2294 else if (TREE_CODE (type) == FUNCTION_TYPE
2295 && TYPE_ARG_TYPES (type) != 0)
2296 /* The types might not be truly local,
2297 but the list of arg types certainly is temporary.
2298 Since prototypes are nontraditional,
2299 ok not to do the traditional thing. */
2301 type = TREE_TYPE (type);
2305 b = global_binding_level;
2308 /* This name is new in its binding level.
2309 Install the new declaration and return it. */
2310 if (b == global_binding_level)
2312 /* Install a global value. */
2314 /* If the first global decl has external linkage,
2315 warn if we later see static one. */
2316 if (IDENTIFIER_GLOBAL_VALUE (name) == 0 && TREE_PUBLIC (x))
2317 TREE_PUBLIC (name) = 1;
2319 IDENTIFIER_GLOBAL_VALUE (name) = x;
2321 /* We no longer care about any previous block level declarations. */
2322 IDENTIFIER_LIMBO_VALUE (name) = 0;
2324 /* Don't forget if the function was used via an implicit decl. */
2325 if (IDENTIFIER_IMPLICIT_DECL (name)
2326 && TREE_USED (IDENTIFIER_IMPLICIT_DECL (name)))
2327 TREE_USED (x) = 1, TREE_USED (name) = 1;
2329 /* Don't forget if its address was taken in that way. */
2330 if (IDENTIFIER_IMPLICIT_DECL (name)
2331 && TREE_ADDRESSABLE (IDENTIFIER_IMPLICIT_DECL (name)))
2332 TREE_ADDRESSABLE (x) = 1;
2334 /* Warn about mismatches against previous implicit decl. */
2335 if (IDENTIFIER_IMPLICIT_DECL (name) != 0
2336 /* If this real decl matches the implicit, don't complain. */
2337 && ! (TREE_CODE (x) == FUNCTION_DECL
2338 && (TYPE_MAIN_VARIANT (TREE_TYPE (TREE_TYPE (x)))
2339 == integer_type_node)))
2340 pedwarn ("`%s' was previously implicitly declared to return `int'",
2341 IDENTIFIER_POINTER (name));
2343 /* If this decl is `static' and an `extern' was seen previously,
2344 that is erroneous. */
2345 if (TREE_PUBLIC (name)
2346 && ! TREE_PUBLIC (x) && ! DECL_EXTERNAL (x))
2348 /* Okay to redeclare an ANSI built-in as static. */
2349 if (t != 0 && DECL_BUILT_IN (t))
2351 /* Okay to declare a non-ANSI built-in as anything. */
2352 else if (t != 0 && DECL_BUILT_IN_NONANSI (t))
2354 /* Okay to have global type decl after an earlier extern
2355 declaration inside a lexical block. */
2356 else if (TREE_CODE (x) == TYPE_DECL)
2358 else if (IDENTIFIER_IMPLICIT_DECL (name))
2360 if (! TREE_THIS_VOLATILE (name))
2361 pedwarn ("`%s' was declared implicitly `extern' and later `static'",
2362 IDENTIFIER_POINTER (name));
2365 pedwarn ("`%s' was declared `extern' and later `static'",
2366 IDENTIFIER_POINTER (name));
2371 /* Here to install a non-global value. */
2372 tree oldlocal = IDENTIFIER_LOCAL_VALUE (name);
2373 tree oldglobal = IDENTIFIER_GLOBAL_VALUE (name);
2375 IDENTIFIER_LOCAL_VALUE (name) = x;
2377 /* If this is an extern function declaration, see if we
2378 have a global definition or declaration for the function. */
2381 && TREE_CODE (x) == FUNCTION_DECL
2382 && TREE_CODE (oldglobal) == FUNCTION_DECL
2383 && DECL_EXTERNAL (x) && ! DECL_INLINE (x))
2385 /* We have one. Their types must agree. */
2386 if (! comptypes (TREE_TYPE (x),
2387 TREE_TYPE (IDENTIFIER_GLOBAL_VALUE (name))))
2388 pedwarn_with_decl (x, "extern declaration of `%s' doesn't match global one");
2391 /* Inner extern decl is inline if global one is.
2392 Copy enough to really inline it. */
2393 if (DECL_INLINE (oldglobal))
2395 DECL_INLINE (x) = DECL_INLINE (oldglobal);
2396 DECL_INITIAL (x) = (current_function_decl == oldglobal
2397 ? 0 : DECL_INITIAL (oldglobal));
2398 DECL_SAVED_INSNS (x) = DECL_SAVED_INSNS (oldglobal);
2399 DECL_FRAME_SIZE (x) = DECL_FRAME_SIZE (oldglobal);
2400 DECL_ARGUMENTS (x) = DECL_ARGUMENTS (oldglobal);
2401 DECL_RESULT (x) = DECL_RESULT (oldglobal);
2402 TREE_ASM_WRITTEN (x) = TREE_ASM_WRITTEN (oldglobal);
2403 DECL_ABSTRACT_ORIGIN (x)
2404 = DECL_ABSTRACT_ORIGIN (oldglobal);
2406 /* Inner extern decl is built-in if global one is. */
2407 if (DECL_BUILT_IN (oldglobal))
2409 DECL_BUILT_IN_CLASS (x) = DECL_BUILT_IN_CLASS (oldglobal);
2410 DECL_FUNCTION_CODE (x) = DECL_FUNCTION_CODE (oldglobal);
2412 /* Keep the arg types from a file-scope fcn defn. */
2413 if (TYPE_ARG_TYPES (TREE_TYPE (oldglobal)) != 0
2414 && DECL_INITIAL (oldglobal)
2415 && TYPE_ARG_TYPES (TREE_TYPE (x)) == 0)
2416 TREE_TYPE (x) = TREE_TYPE (oldglobal);
2421 /* This case is probably sometimes the right thing to do. */
2422 /* If we have a local external declaration,
2423 then any file-scope declaration should not
2424 have been static. */
2425 if (oldlocal == 0 && oldglobal != 0
2426 && !TREE_PUBLIC (oldglobal)
2427 && DECL_EXTERNAL (x) && TREE_PUBLIC (x))
2428 warning ("`%s' locally external but globally static",
2429 IDENTIFIER_POINTER (name));
2432 /* If we have a local external declaration,
2433 and no file-scope declaration has yet been seen,
2434 then if we later have a file-scope decl it must not be static. */
2436 && DECL_EXTERNAL (x)
2440 TREE_PUBLIC (name) = 1;
2442 /* Save this decl, so that we can do type checking against
2443 other decls after it falls out of scope.
2445 Only save it once. This prevents temporary decls created in
2446 expand_inline_function from being used here, since this
2447 will have been set when the inline function was parsed.
2448 It also helps give slightly better warnings. */
2449 if (IDENTIFIER_LIMBO_VALUE (name) == 0)
2450 IDENTIFIER_LIMBO_VALUE (name) = x;
2453 /* Warn if shadowing an argument at the top level of the body. */
2454 if (oldlocal != 0 && !DECL_EXTERNAL (x)
2455 /* This warning doesn't apply to the parms of a nested fcn. */
2456 && ! current_binding_level->parm_flag
2457 /* Check that this is one level down from the parms. */
2458 && current_binding_level->level_chain->parm_flag
2459 /* Check that the decl being shadowed
2460 comes from the parm level, one level up. */
2461 && chain_member (oldlocal, current_binding_level->level_chain->names))
2463 if (TREE_CODE (oldlocal) == PARM_DECL)
2464 pedwarn ("declaration of `%s' shadows a parameter",
2465 IDENTIFIER_POINTER (name));
2467 pedwarn ("declaration of `%s' shadows a symbol from the parameter list",
2468 IDENTIFIER_POINTER (name));
2471 /* Maybe warn if shadowing something else. */
2472 else if (warn_shadow && !DECL_EXTERNAL (x)
2473 /* No shadow warnings for internally generated vars. */
2474 && DECL_SOURCE_LINE (x) != 0
2475 /* No shadow warnings for vars made for inlining. */
2476 && ! DECL_FROM_INLINE (x))
2478 const char *id = IDENTIFIER_POINTER (name);
2480 if (TREE_CODE (x) == PARM_DECL
2481 && current_binding_level->level_chain->parm_flag)
2482 /* Don't warn about the parm names in function declarator
2483 within a function declarator.
2484 It would be nice to avoid warning in any function
2485 declarator in a declaration, as opposed to a definition,
2486 but there is no way to tell it's not a definition. */
2488 else if (oldlocal != 0 && TREE_CODE (oldlocal) == PARM_DECL)
2489 warning ("declaration of `%s' shadows a parameter", id);
2490 else if (oldlocal != 0)
2491 warning ("declaration of `%s' shadows previous local", id);
2492 else if (IDENTIFIER_GLOBAL_VALUE (name) != 0
2493 && IDENTIFIER_GLOBAL_VALUE (name) != error_mark_node)
2494 warning ("declaration of `%s' shadows global declaration", id);
2497 /* If storing a local value, there may already be one (inherited).
2498 If so, record it for restoration when this binding level ends. */
2500 b->shadowed = tree_cons (name, oldlocal, b->shadowed);
2503 /* Keep count of variables in this level with incomplete type.
2504 If the input is erroneous, we can have error_mark in the type
2505 slot (e.g. "f(void a, ...)") - that doesn't count as an
2507 if (TREE_TYPE (x) != error_mark_node
2508 && !COMPLETE_TYPE_P (TREE_TYPE (x)))
2512 /* Put decls on list in reverse order.
2513 We will reverse them later if necessary. */
2514 TREE_CHAIN (x) = b->names;
2520 /* Like pushdecl, only it places X in GLOBAL_BINDING_LEVEL, if appropriate. */
2523 pushdecl_top_level (x)
2527 register struct binding_level *b = current_binding_level;
2529 current_binding_level = global_binding_level;
2531 current_binding_level = b;
2535 /* Generate an implicit declaration for identifier FUNCTIONID
2536 as a function of type int (). Print a warning if appropriate. */
2539 implicitly_declare (functionid)
2543 int traditional_warning = 0;
2544 /* Only one "implicit declaration" warning per identifier. */
2545 int implicit_warning;
2547 /* We used to reuse an old implicit decl here,
2548 but this loses with inline functions because it can clobber
2549 the saved decl chains. */
2551 if (IDENTIFIER_IMPLICIT_DECL (functionid) != 0)
2552 decl = IDENTIFIER_IMPLICIT_DECL (functionid);
2555 decl = build_decl (FUNCTION_DECL, functionid, default_function_type);
2557 /* Warn of implicit decl following explicit local extern decl.
2558 This is probably a program designed for traditional C. */
2559 if (TREE_PUBLIC (functionid) && IDENTIFIER_GLOBAL_VALUE (functionid) == 0)
2560 traditional_warning = 1;
2562 /* Warn once of an implicit declaration. */
2563 implicit_warning = (IDENTIFIER_IMPLICIT_DECL (functionid) == 0);
2565 DECL_EXTERNAL (decl) = 1;
2566 TREE_PUBLIC (decl) = 1;
2568 /* Record that we have an implicit decl and this is it. */
2569 IDENTIFIER_IMPLICIT_DECL (functionid) = decl;
2571 /* ANSI standard says implicit declarations are in the innermost block.
2572 So we record the decl in the standard fashion.
2573 If flag_traditional is set, pushdecl does it top-level. */
2576 /* This is a no-op in c-lang.c or something real in objc-actions.c. */
2577 maybe_objc_check_decl (decl);
2579 rest_of_decl_compilation (decl, NULL_PTR, 0, 0);
2581 if (implicit_warning)
2582 implicit_decl_warning (functionid);
2583 else if (warn_traditional && traditional_warning)
2584 warning ("function `%s' was previously declared within a block",
2585 IDENTIFIER_POINTER (functionid));
2587 /* Write a record describing this implicit function declaration to the
2588 prototypes file (if requested). */
2590 gen_aux_info_record (decl, 0, 1, 0);
2596 implicit_decl_warning (id)
2599 const char *name = IDENTIFIER_POINTER (id);
2600 if (mesg_implicit_function_declaration == 2)
2601 error ("implicit declaration of function `%s'", name);
2602 else if (mesg_implicit_function_declaration == 1)
2603 warning ("implicit declaration of function `%s'", name);
2606 /* Return zero if the declaration NEWDECL is valid
2607 when the declaration OLDDECL (assumed to be for the same name)
2608 has already been seen.
2609 Otherwise return 1 if NEWDECL is a redefinition, 2 if it is a redeclaration,
2610 and 3 if it is a conflicting declaration. */
2613 redeclaration_error_message (newdecl, olddecl)
2614 tree newdecl, olddecl;
2616 if (TREE_CODE (newdecl) == TYPE_DECL)
2618 if (flag_traditional && TREE_TYPE (newdecl) == TREE_TYPE (olddecl))
2620 /* pushdecl creates distinct types for TYPE_DECLs by calling
2621 build_type_copy, so the above comparison generally fails. We do
2622 another test against the TYPE_MAIN_VARIANT of the olddecl, which
2623 is equivalent to what this code used to do before the build_type_copy
2624 call. The variant type distinction should not matter for traditional
2625 code, because it doesn't have type qualifiers. */
2626 if (flag_traditional
2627 && TYPE_MAIN_VARIANT (TREE_TYPE (olddecl)) == TREE_TYPE (newdecl))
2629 if (DECL_IN_SYSTEM_HEADER (olddecl) || DECL_IN_SYSTEM_HEADER (newdecl))
2633 else if (TREE_CODE (newdecl) == FUNCTION_DECL)
2635 /* Declarations of functions can insist on internal linkage
2636 but they can't be inconsistent with internal linkage,
2637 so there can be no error on that account.
2638 However defining the same name twice is no good. */
2639 if (DECL_INITIAL (olddecl) != 0 && DECL_INITIAL (newdecl) != 0
2640 /* However, defining once as extern inline and a second
2641 time in another way is ok. */
2642 && ! (DECL_INLINE (olddecl) && DECL_EXTERNAL (olddecl)
2643 && ! (DECL_INLINE (newdecl) && DECL_EXTERNAL (newdecl))))
2647 else if (DECL_CONTEXT (newdecl) == NULL_TREE)
2649 /* Objects declared at top level: */
2650 /* If at least one is a reference, it's ok. */
2651 if (DECL_EXTERNAL (newdecl) || DECL_EXTERNAL (olddecl))
2653 /* Reject two definitions. */
2654 if (DECL_INITIAL (olddecl) != 0 && DECL_INITIAL (newdecl) != 0)
2656 /* Now we have two tentative defs, or one tentative and one real def. */
2657 /* Insist that the linkage match. */
2658 if (TREE_PUBLIC (olddecl) != TREE_PUBLIC (newdecl))
2662 else if (current_binding_level->parm_flag
2663 && TREE_ASM_WRITTEN (olddecl) && !TREE_ASM_WRITTEN (newdecl))
2667 /* Newdecl has block scope. If olddecl has block scope also, then
2668 reject two definitions, and reject a definition together with an
2669 external reference. Otherwise, it is OK, because newdecl must
2670 be an extern reference to olddecl. */
2671 if (!(DECL_EXTERNAL (newdecl) && DECL_EXTERNAL (olddecl))
2672 && DECL_CONTEXT (newdecl) == DECL_CONTEXT (olddecl))
2678 /* Get the LABEL_DECL corresponding to identifier ID as a label.
2679 Create one if none exists so far for the current function.
2680 This function is called for both label definitions and label references. */
2686 register tree decl = IDENTIFIER_LABEL_VALUE (id);
2688 if (current_function_decl == 0)
2690 error ("label %s referenced outside of any function",
2691 IDENTIFIER_POINTER (id));
2695 /* Use a label already defined or ref'd with this name. */
2698 /* But not if it is inherited and wasn't declared to be inheritable. */
2699 if (DECL_CONTEXT (decl) != current_function_decl
2700 && ! C_DECLARED_LABEL_FLAG (decl))
2701 return shadow_label (id);
2705 decl = build_decl (LABEL_DECL, id, void_type_node);
2707 /* A label not explicitly declared must be local to where it's ref'd. */
2708 DECL_CONTEXT (decl) = current_function_decl;
2710 DECL_MODE (decl) = VOIDmode;
2712 /* Say where one reference is to the label,
2713 for the sake of the error if it is not defined. */
2714 DECL_SOURCE_LINE (decl) = lineno;
2715 DECL_SOURCE_FILE (decl) = input_filename;
2717 IDENTIFIER_LABEL_VALUE (id) = decl;
2719 named_labels = tree_cons (NULL_TREE, decl, named_labels);
2724 /* Make a label named NAME in the current function,
2725 shadowing silently any that may be inherited from containing functions
2726 or containing scopes.
2728 Note that valid use, if the label being shadowed
2729 comes from another scope in the same function,
2730 requires calling declare_nonlocal_label right away. */
2736 register tree decl = IDENTIFIER_LABEL_VALUE (name);
2742 /* Check to make sure that the label hasn't already been declared
2743 at this label scope */
2744 for (dup = named_labels; dup; dup = TREE_CHAIN (dup))
2745 if (TREE_VALUE (dup) == decl)
2747 error ("duplicate label declaration `%s'",
2748 IDENTIFIER_POINTER (name));
2749 error_with_decl (TREE_VALUE (dup),
2750 "this is a previous declaration");
2751 /* Just use the previous declaration. */
2752 return lookup_label (name);
2755 shadowed_labels = tree_cons (NULL_TREE, decl, shadowed_labels);
2756 IDENTIFIER_LABEL_VALUE (name) = decl = 0;
2759 return lookup_label (name);
2762 /* Define a label, specifying the location in the source file.
2763 Return the LABEL_DECL node for the label, if the definition is valid.
2764 Otherwise return 0. */
2767 define_label (filename, line, name)
2768 const char *filename;
2772 tree decl = lookup_label (name);
2774 /* If label with this name is known from an outer context, shadow it. */
2775 if (decl != 0 && DECL_CONTEXT (decl) != current_function_decl)
2777 shadowed_labels = tree_cons (NULL_TREE, decl, shadowed_labels);
2778 IDENTIFIER_LABEL_VALUE (name) = 0;
2779 decl = lookup_label (name);
2782 if (warn_traditional && !in_system_header && lookup_name (name))
2783 warning_with_file_and_line (filename, line,
2784 "traditional C lacks a separate namespace for labels, identifier `%s' conflicts",
2785 IDENTIFIER_POINTER (name));
2787 if (DECL_INITIAL (decl) != 0)
2789 error_with_file_and_line (filename, line, "duplicate label `%s'",
2790 IDENTIFIER_POINTER (name));
2795 /* Mark label as having been defined. */
2796 DECL_INITIAL (decl) = error_mark_node;
2797 /* Say where in the source. */
2798 DECL_SOURCE_FILE (decl) = filename;
2799 DECL_SOURCE_LINE (decl) = line;
2804 /* Return the list of declarations of the current level.
2805 Note that this list is in reverse order unless/until
2806 you nreverse it; and when you do nreverse it, you must
2807 store the result back using `storedecls' or you will lose. */
2812 return current_binding_level->names;
2815 /* Return the list of type-tags (for structs, etc) of the current level. */
2820 return current_binding_level->tags;
2823 /* Store the list of declarations of the current level.
2824 This is done for the parameter declarations of a function being defined,
2825 after they are modified in the light of any missing parameters. */
2831 current_binding_level->names = decls;
2834 /* Similarly, store the list of tags of the current level. */
2840 current_binding_level->tags = tags;
2843 /* Given NAME, an IDENTIFIER_NODE,
2844 return the structure (or union or enum) definition for that name.
2845 Searches binding levels from BINDING_LEVEL up to the global level.
2846 If THISLEVEL_ONLY is nonzero, searches only the specified context
2847 (but skips any tag-transparent contexts to find one that is
2848 meaningful for tags).
2849 CODE says which kind of type the caller wants;
2850 it is RECORD_TYPE or UNION_TYPE or ENUMERAL_TYPE.
2851 If the wrong kind of type is found, an error is reported. */
2854 lookup_tag (code, name, binding_level, thislevel_only)
2855 enum tree_code code;
2856 struct binding_level *binding_level;
2860 register struct binding_level *level;
2862 for (level = binding_level; level; level = level->level_chain)
2865 for (tail = level->tags; tail; tail = TREE_CHAIN (tail))
2867 if (TREE_PURPOSE (tail) == name)
2869 if (TREE_CODE (TREE_VALUE (tail)) != code)
2871 /* Definition isn't the kind we were looking for. */
2872 pending_invalid_xref = name;
2873 pending_invalid_xref_file = input_filename;
2874 pending_invalid_xref_line = lineno;
2876 return TREE_VALUE (tail);
2879 if (thislevel_only && ! level->tag_transparent)
2885 /* Print an error message now
2886 for a recent invalid struct, union or enum cross reference.
2887 We don't print them immediately because they are not invalid
2888 when used in the `struct foo;' construct for shadowing. */
2891 pending_xref_error ()
2893 if (pending_invalid_xref != 0)
2894 error_with_file_and_line (pending_invalid_xref_file,
2895 pending_invalid_xref_line,
2896 "`%s' defined as wrong kind of tag",
2897 IDENTIFIER_POINTER (pending_invalid_xref));
2898 pending_invalid_xref = 0;
2901 /* Given a type, find the tag that was defined for it and return the tag name.
2902 Otherwise return 0. */
2905 lookup_tag_reverse (type)
2908 register struct binding_level *level;
2910 for (level = current_binding_level; level; level = level->level_chain)
2913 for (tail = level->tags; tail; tail = TREE_CHAIN (tail))
2915 if (TREE_VALUE (tail) == type)
2916 return TREE_PURPOSE (tail);
2922 /* Look up NAME in the current binding level and its superiors
2923 in the namespace of variables, functions and typedefs.
2924 Return a ..._DECL node of some kind representing its definition,
2925 or return 0 if it is undefined. */
2933 if (current_binding_level != global_binding_level
2934 && IDENTIFIER_LOCAL_VALUE (name))
2935 val = IDENTIFIER_LOCAL_VALUE (name);
2937 val = IDENTIFIER_GLOBAL_VALUE (name);
2941 /* Similar to `lookup_name' but look only at current binding level. */
2944 lookup_name_current_level (name)
2949 if (current_binding_level == global_binding_level)
2950 return IDENTIFIER_GLOBAL_VALUE (name);
2952 if (IDENTIFIER_LOCAL_VALUE (name) == 0)
2955 for (t = current_binding_level->names; t; t = TREE_CHAIN (t))
2956 if (DECL_NAME (t) == name)
2962 /* Mark ARG for GC. */
2965 mark_binding_level (arg)
2968 struct binding_level *level = *(struct binding_level **) arg;
2970 for (; level != 0; level = level->level_chain)
2972 ggc_mark_tree (level->names);
2973 ggc_mark_tree (level->tags);
2974 ggc_mark_tree (level->shadowed);
2975 ggc_mark_tree (level->blocks);
2976 ggc_mark_tree (level->this_block);
2977 ggc_mark_tree (level->parm_order);
2981 /* Create the predefined scalar types of C,
2982 and some nodes representing standard constants (0, 1, (void *) 0).
2983 Initialize the global binding level.
2984 Make definitions for built-in primitive functions. */
2987 init_decl_processing ()
2989 register tree endlink;
2990 tree ptr_ftype_void, ptr_ftype_ptr;
2991 int wchar_type_size;
2992 tree array_domain_type;
2995 current_function_decl = NULL;
2996 named_labels = NULL;
2997 current_binding_level = NULL_BINDING_LEVEL;
2998 free_binding_level = NULL_BINDING_LEVEL;
3000 /* Make the binding_level structure for global names. */
3002 global_binding_level = current_binding_level;
3004 build_common_tree_nodes (flag_signed_char);
3006 /* Define `int' and `char' first so that dbx will output them first. */
3007 pushdecl (build_decl (TYPE_DECL, ridpointers[(int) RID_INT],
3008 integer_type_node));
3009 pushdecl (build_decl (TYPE_DECL, get_identifier ("char"),
3011 pushdecl (build_decl (TYPE_DECL, get_identifier ("long int"),
3012 long_integer_type_node));
3013 pushdecl (build_decl (TYPE_DECL, get_identifier ("unsigned int"),
3014 unsigned_type_node));
3015 pushdecl (build_decl (TYPE_DECL, get_identifier ("long unsigned int"),
3016 long_unsigned_type_node));
3017 pushdecl (build_decl (TYPE_DECL, get_identifier ("long long int"),
3018 long_long_integer_type_node));
3019 pushdecl (build_decl (TYPE_DECL, get_identifier ("long long unsigned int"),
3020 long_long_unsigned_type_node));
3021 pushdecl (build_decl (TYPE_DECL, get_identifier ("short int"),
3022 short_integer_type_node));
3023 pushdecl (build_decl (TYPE_DECL, get_identifier ("short unsigned int"),
3024 short_unsigned_type_node));
3025 pushdecl (build_decl (TYPE_DECL, get_identifier ("signed char"),
3026 signed_char_type_node));
3027 pushdecl (build_decl (TYPE_DECL, get_identifier ("unsigned char"),
3028 unsigned_char_type_node));
3029 pushdecl (build_decl (TYPE_DECL, NULL_TREE, intQI_type_node));
3030 pushdecl (build_decl (TYPE_DECL, NULL_TREE, intHI_type_node));
3031 pushdecl (build_decl (TYPE_DECL, NULL_TREE, intSI_type_node));
3032 pushdecl (build_decl (TYPE_DECL, NULL_TREE, intDI_type_node));
3033 #if HOST_BITS_PER_WIDE_INT >= 64
3034 pushdecl (build_decl (TYPE_DECL, NULL_TREE, intTI_type_node));
3036 pushdecl (build_decl (TYPE_DECL, NULL_TREE, unsigned_intQI_type_node));
3037 pushdecl (build_decl (TYPE_DECL, NULL_TREE, unsigned_intHI_type_node));
3038 pushdecl (build_decl (TYPE_DECL, NULL_TREE, unsigned_intSI_type_node));
3039 pushdecl (build_decl (TYPE_DECL, NULL_TREE, unsigned_intDI_type_node));
3040 #if HOST_BITS_PER_WIDE_INT >= 64
3041 pushdecl (build_decl (TYPE_DECL, NULL_TREE, unsigned_intTI_type_node));
3044 /* `unsigned long' is the standard type for sizeof.
3045 Traditionally, use a signed type.
3046 Note that stddef.h uses `unsigned long',
3047 and this must agree, even if long and int are the same size. */
3048 t = TREE_TYPE (IDENTIFIER_GLOBAL_VALUE (get_identifier (SIZE_TYPE)));
3049 signed_size_type_node = signed_type (t);
3050 if (flag_traditional && TREE_UNSIGNED (t))
3051 t = signed_type (t);
3053 c_size_type_node = t;
3056 /* Create the widest literal types. */
3057 widest_integer_literal_type_node
3058 = make_signed_type (HOST_BITS_PER_WIDE_INT * 2);
3059 widest_unsigned_literal_type_node
3060 = make_unsigned_type (HOST_BITS_PER_WIDE_INT * 2);
3061 pushdecl (build_decl (TYPE_DECL, NULL_TREE,
3062 widest_integer_literal_type_node));
3063 pushdecl (build_decl (TYPE_DECL, NULL_TREE,
3064 widest_unsigned_literal_type_node));
3066 build_common_tree_nodes_2 (flag_short_double);
3068 pushdecl (build_decl (TYPE_DECL, ridpointers[(int) RID_FLOAT],
3070 pushdecl (build_decl (TYPE_DECL, ridpointers[(int) RID_DOUBLE],
3072 pushdecl (build_decl (TYPE_DECL, get_identifier ("long double"),
3073 long_double_type_node));
3074 pushdecl (build_decl (TYPE_DECL, get_identifier ("complex int"),
3075 complex_integer_type_node));
3076 pushdecl (build_decl (TYPE_DECL, get_identifier ("complex float"),
3077 complex_float_type_node));
3078 pushdecl (build_decl (TYPE_DECL, get_identifier ("complex double"),
3079 complex_double_type_node));
3080 pushdecl (build_decl (TYPE_DECL, get_identifier ("complex long double"),
3081 complex_long_double_type_node));
3082 pushdecl (build_decl (TYPE_DECL,
3083 ridpointers[(int) RID_VOID], void_type_node));
3085 #ifdef MD_INIT_BUILTINS
3089 wchar_type_node = get_identifier (flag_short_wchar
3090 ? "short unsigned int"
3092 wchar_type_node = TREE_TYPE (IDENTIFIER_GLOBAL_VALUE (wchar_type_node));
3093 wchar_type_size = TYPE_PRECISION (wchar_type_node);
3094 signed_wchar_type_node = signed_type (wchar_type_node);
3095 unsigned_wchar_type_node = unsigned_type (wchar_type_node);
3098 TREE_TYPE (IDENTIFIER_GLOBAL_VALUE (get_identifier (WINT_TYPE)));
3101 TREE_TYPE (IDENTIFIER_GLOBAL_VALUE (get_identifier (INTMAX_TYPE)));
3103 TREE_TYPE (IDENTIFIER_GLOBAL_VALUE (get_identifier (UINTMAX_TYPE)));
3105 boolean_type_node = integer_type_node;
3106 boolean_true_node = integer_one_node;
3107 boolean_false_node = integer_zero_node;
3109 /* With GCC, C99's _Bool is always of size 1. */
3110 c_bool_type_node = make_unsigned_type (CHAR_TYPE_SIZE);
3111 TREE_SET_CODE (c_bool_type_node, BOOLEAN_TYPE);
3112 TYPE_MAX_VALUE (c_bool_type_node) = build_int_2 (1, 0);
3113 TREE_TYPE (TYPE_MAX_VALUE (c_bool_type_node)) = c_bool_type_node;
3114 TYPE_PRECISION (c_bool_type_node) = 1;
3115 pushdecl (build_decl (TYPE_DECL, get_identifier ("_Bool"),
3117 c_bool_false_node = build_int_2 (0, 0);
3118 TREE_TYPE (c_bool_false_node) = c_bool_type_node;
3119 c_bool_true_node = build_int_2 (1, 0);
3120 TREE_TYPE (c_bool_true_node) = c_bool_type_node;
3122 string_type_node = build_pointer_type (char_type_node);
3123 const_string_type_node
3124 = build_pointer_type (build_type_variant (char_type_node, 1, 0));
3126 /* Make a type to be the domain of a few array types
3127 whose domains don't really matter.
3128 200 is small enough that it always fits in size_t
3129 and large enough that it can hold most function names for the
3130 initializations of __FUNCTION__ and __PRETTY_FUNCTION__. */
3131 array_domain_type = build_index_type (build_int_2 (200, 0));
3133 /* make a type for arrays of characters.
3134 With luck nothing will ever really depend on the length of this
3136 char_array_type_node = build_array_type (char_type_node, array_domain_type);
3138 /* Likewise for arrays of ints. */
3140 = build_array_type (integer_type_node, array_domain_type);
3142 /* This is for wide string constants. */
3143 wchar_array_type_node
3144 = build_array_type (wchar_type_node, array_domain_type);
3146 void_list_node = tree_cons (NULL_TREE, void_type_node, NULL_TREE);
3148 default_function_type = build_function_type (integer_type_node, NULL_TREE);
3150 = TREE_TYPE (IDENTIFIER_GLOBAL_VALUE (get_identifier (PTRDIFF_TYPE)));
3151 unsigned_ptrdiff_type_node = unsigned_type (ptrdiff_type_node);
3153 c_common_nodes_and_builtins ();
3155 endlink = void_list_node;
3156 ptr_ftype_void = build_function_type (ptr_type_node, endlink);
3158 = build_function_type (ptr_type_node,
3159 tree_cons (NULL_TREE, ptr_type_node, endlink));
3161 /* Types which are common to the fortran compiler and libf2c. When
3162 changing these, you also need to be concerned with f/com.h. */
3164 if (TYPE_PRECISION (float_type_node)
3165 == TYPE_PRECISION (long_integer_type_node))
3167 g77_integer_type_node = long_integer_type_node;
3168 g77_uinteger_type_node = long_unsigned_type_node;
3170 else if (TYPE_PRECISION (float_type_node)
3171 == TYPE_PRECISION (integer_type_node))
3173 g77_integer_type_node = integer_type_node;
3174 g77_uinteger_type_node = unsigned_type_node;
3177 g77_integer_type_node = g77_uinteger_type_node = NULL_TREE;
3179 if (g77_integer_type_node != NULL_TREE)
3181 pushdecl (build_decl (TYPE_DECL, get_identifier ("__g77_integer"),
3182 g77_integer_type_node));
3183 pushdecl (build_decl (TYPE_DECL, get_identifier ("__g77_uinteger"),
3184 g77_uinteger_type_node));
3187 if (TYPE_PRECISION (float_type_node) * 2
3188 == TYPE_PRECISION (long_integer_type_node))
3190 g77_longint_type_node = long_integer_type_node;
3191 g77_ulongint_type_node = long_unsigned_type_node;
3193 else if (TYPE_PRECISION (float_type_node) * 2
3194 == TYPE_PRECISION (long_long_integer_type_node))
3196 g77_longint_type_node = long_long_integer_type_node;
3197 g77_ulongint_type_node = long_long_unsigned_type_node;
3200 g77_longint_type_node = g77_ulongint_type_node = NULL_TREE;
3202 if (g77_longint_type_node != NULL_TREE)
3204 pushdecl (build_decl (TYPE_DECL, get_identifier ("__g77_longint"),
3205 g77_longint_type_node));
3206 pushdecl (build_decl (TYPE_DECL, get_identifier ("__g77_ulongint"),
3207 g77_ulongint_type_node));
3210 builtin_function ("__builtin_aggregate_incoming_address",
3211 build_function_type (ptr_type_node, NULL_TREE),
3212 BUILT_IN_AGGREGATE_INCOMING_ADDRESS,
3213 BUILT_IN_NORMAL, NULL_PTR);
3215 /* Hooks for the DWARF 2 __throw routine. */
3216 builtin_function ("__builtin_unwind_init",
3217 build_function_type (void_type_node, endlink),
3218 BUILT_IN_UNWIND_INIT, BUILT_IN_NORMAL, NULL_PTR);
3219 builtin_function ("__builtin_dwarf_cfa", ptr_ftype_void,
3220 BUILT_IN_DWARF_CFA, BUILT_IN_NORMAL, NULL_PTR);
3221 builtin_function ("__builtin_dwarf_fp_regnum",
3222 build_function_type (unsigned_type_node, endlink),
3223 BUILT_IN_DWARF_FP_REGNUM, BUILT_IN_NORMAL, NULL_PTR);
3224 builtin_function ("__builtin_init_dwarf_reg_size_table", void_ftype_ptr,
3225 BUILT_IN_INIT_DWARF_REG_SIZES, BUILT_IN_NORMAL, NULL_PTR);
3226 builtin_function ("__builtin_frob_return_addr", ptr_ftype_ptr,
3227 BUILT_IN_FROB_RETURN_ADDR, BUILT_IN_NORMAL, NULL_PTR);
3228 builtin_function ("__builtin_extract_return_addr", ptr_ftype_ptr,
3229 BUILT_IN_EXTRACT_RETURN_ADDR, BUILT_IN_NORMAL, NULL_PTR);
3231 ("__builtin_eh_return",
3232 build_function_type (void_type_node,
3233 tree_cons (NULL_TREE, ptr_type_node,
3234 tree_cons (NULL_TREE,
3235 type_for_mode (ptr_mode, 0),
3236 tree_cons (NULL_TREE,
3239 BUILT_IN_EH_RETURN, BUILT_IN_NORMAL, NULL_PTR);
3241 pedantic_lvalues = pedantic;
3243 /* Create the global bindings for __FUNCTION__, __PRETTY_FUNCTION__,
3245 function_id_node = get_identifier ("__FUNCTION__");
3246 pretty_function_id_node = get_identifier ("__PRETTY_FUNCTION__");
3247 func_id_node = get_identifier ("__func__");
3248 make_fname_decl = c_make_fname_decl;
3249 declare_function_name ();
3251 start_identifier_warnings ();
3253 /* Prepare to check format strings against argument lists. */
3254 init_function_format_info ();
3256 incomplete_decl_finalize_hook = finish_incomplete_decl;
3258 /* Record our roots. */
3260 ggc_add_tree_root (c_global_trees, CTI_MAX);
3261 ggc_add_root (&c_stmt_tree, 1, sizeof c_stmt_tree, mark_stmt_tree);
3262 ggc_add_tree_root (&c_scope_stmt_stack, 1);
3263 ggc_add_tree_root (&named_labels, 1);
3264 ggc_add_tree_root (&shadowed_labels, 1);
3265 ggc_add_root (¤t_binding_level, 1, sizeof current_binding_level,
3266 mark_binding_level);
3267 ggc_add_root (&label_level_chain, 1, sizeof label_level_chain,
3268 mark_binding_level);
3269 ggc_add_tree_root (&static_ctors, 1);
3270 ggc_add_tree_root (&static_dtors, 1);
3273 /* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give the
3274 decl, NAME is the initialization string and TYPE_DEP indicates whether
3275 NAME depended on the type of the function. As we don't yet implement
3276 delayed emission of static data, we mark the decl as emitted
3277 so it is not placed in the output. Anything using it must therefore pull
3278 out the STRING_CST initializer directly. This does mean that these names
3279 are string merging candidates, which is wrong for C99's __func__. FIXME. */
3282 c_make_fname_decl (id, name, type_dep)
3285 int type_dep ATTRIBUTE_UNUSED;
3287 tree decl, type, init;
3288 size_t length = strlen (name);
3290 type = build_array_type
3291 (build_qualified_type (char_type_node, TYPE_QUAL_CONST),
3292 build_index_type (build_int_2 (length, 0)));
3294 decl = build_decl (VAR_DECL, id, type);
3295 TREE_STATIC (decl) = 1;
3296 TREE_READONLY (decl) = 1;
3297 TREE_ASM_WRITTEN (decl) = 1;
3298 DECL_SOURCE_LINE (decl) = 0;
3299 DECL_ARTIFICIAL (decl) = 1;
3300 DECL_IN_SYSTEM_HEADER (decl) = 1;
3301 DECL_IGNORED_P (decl) = 1;
3302 init = build_string (length + 1, name);
3303 TREE_TYPE (init) = type;
3304 DECL_INITIAL (decl) = init;
3305 finish_decl (pushdecl (decl), init, NULL_TREE);
3310 /* Return a definition for a builtin function named NAME and whose data type
3311 is TYPE. TYPE should be a function type with argument types.
3312 FUNCTION_CODE tells later passes how to compile calls to this function.
3313 See tree.h for its possible values.
3315 If LIBRARY_NAME is nonzero, use that for DECL_ASSEMBLER_NAME,
3316 the name to be called if we can't opencode the function. */
3319 builtin_function (name, type, function_code, class, library_name)
3323 enum built_in_class class;
3324 const char *library_name;
3326 tree decl = build_decl (FUNCTION_DECL, get_identifier (name), type);
3327 DECL_EXTERNAL (decl) = 1;
3328 TREE_PUBLIC (decl) = 1;
3329 /* If -traditional, permit redefining a builtin function any way you like.
3330 (Though really, if the program redefines these functions,
3331 it probably won't work right unless compiled with -fno-builtin.) */
3332 if (flag_traditional && name[0] != '_')
3333 DECL_BUILT_IN_NONANSI (decl) = 1;
3335 DECL_ASSEMBLER_NAME (decl) = get_identifier (library_name);
3336 make_decl_rtl (decl, NULL_PTR, 1);
3338 DECL_BUILT_IN_CLASS (decl) = class;
3339 DECL_FUNCTION_CODE (decl) = function_code;
3341 /* Warn if a function in the namespace for users
3342 is used without an occasion to consider it declared. */
3343 if (name[0] != '_' || name[1] != '_')
3344 C_DECL_ANTICIPATED (decl) = 1;
3349 /* Called when a declaration is seen that contains no names to declare.
3350 If its type is a reference to a structure, union or enum inherited
3351 from a containing scope, shadow that tag name for the current scope
3352 with a forward reference.
3353 If its type defines a new named structure or union
3354 or defines an enum, it is valid but we need not do anything here.
3355 Otherwise, it is an error. */
3358 shadow_tag (declspecs)
3361 shadow_tag_warned (declspecs, 0);
3365 shadow_tag_warned (declspecs, warned)
3368 /* 1 => we have done a pedwarn. 2 => we have done a warning, but
3375 pending_invalid_xref = 0;
3377 /* Remove the attributes from declspecs, since they will confuse the
3379 split_specs_attrs (declspecs, &specs, &attrs);
3381 for (link = specs; link; link = TREE_CHAIN (link))
3383 register tree value = TREE_VALUE (link);
3384 register enum tree_code code = TREE_CODE (value);
3386 if (code == RECORD_TYPE || code == UNION_TYPE || code == ENUMERAL_TYPE)
3387 /* Used to test also that TYPE_SIZE (value) != 0.
3388 That caused warning for `struct foo;' at top level in the file. */
3390 register tree name = lookup_tag_reverse (value);
3397 if (warned != 1 && code != ENUMERAL_TYPE)
3398 /* Empty unnamed enum OK */
3400 pedwarn ("unnamed struct/union that defines no instances");
3406 t = lookup_tag (code, name, current_binding_level, 1);
3410 t = make_node (code);
3417 if (!warned && ! in_system_header)
3419 warning ("useless keyword or type name in empty declaration");
3426 error ("two types specified in one empty declaration");
3431 pedwarn ("empty declaration");
3435 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
3438 groktypename (typename)
3441 if (TREE_CODE (typename) != TREE_LIST)
3443 return grokdeclarator (TREE_VALUE (typename),
3444 TREE_PURPOSE (typename),
3448 /* Return a PARM_DECL node for a given pair of specs and declarator. */
3451 groktypename_in_parm_context (typename)
3454 if (TREE_CODE (typename) != TREE_LIST)
3456 return grokdeclarator (TREE_VALUE (typename),
3457 TREE_PURPOSE (typename),
3461 /* Decode a declarator in an ordinary declaration or data definition.
3462 This is called as soon as the type information and variable name
3463 have been parsed, before parsing the initializer if any.
3464 Here we create the ..._DECL node, fill in its type,
3465 and put it on the list of decls for the current context.
3466 The ..._DECL node is returned as the value.
3468 Exception: for arrays where the length is not specified,
3469 the type is left null, to be filled in by `finish_decl'.
3471 Function definitions do not come here; they go to start_function
3472 instead. However, external and forward declarations of functions
3473 do go through here. Structure field declarations are done by
3474 grokfield and not through here. */
3477 start_decl (declarator, declspecs, initialized, attributes, prefix_attributes)
3478 tree declarator, declspecs;
3480 tree attributes, prefix_attributes;
3482 register tree decl = grokdeclarator (declarator, declspecs,
3483 NORMAL, initialized);
3486 if (warn_main > 0 && TREE_CODE (decl) != FUNCTION_DECL
3487 && MAIN_NAME_P (DECL_NAME (decl)))
3488 warning_with_decl (decl, "`%s' is usually a function");
3491 /* Is it valid for this decl to have an initializer at all?
3492 If not, set INITIALIZED to zero, which will indirectly
3493 tell `finish_decl' to ignore the initializer once it is parsed. */
3494 switch (TREE_CODE (decl))
3497 /* typedef foo = bar means give foo the same type as bar.
3498 We haven't parsed bar yet, so `finish_decl' will fix that up.
3499 Any other case of an initialization in a TYPE_DECL is an error. */
3500 if (pedantic || list_length (declspecs) > 1)
3502 error ("typedef `%s' is initialized",
3503 IDENTIFIER_POINTER (DECL_NAME (decl)));
3509 error ("function `%s' is initialized like a variable",
3510 IDENTIFIER_POINTER (DECL_NAME (decl)));
3515 /* DECL_INITIAL in a PARM_DECL is really DECL_ARG_TYPE. */
3516 error ("parameter `%s' is initialized",
3517 IDENTIFIER_POINTER (DECL_NAME (decl)));
3522 /* Don't allow initializations for incomplete types
3523 except for arrays which might be completed by the initialization. */
3525 /* This can happen if the array size is an undefined macro. We already
3526 gave a warning, so we don't need another one. */
3527 if (TREE_TYPE (decl) == error_mark_node)
3529 else if (COMPLETE_TYPE_P (TREE_TYPE (decl)))
3531 /* A complete type is ok if size is fixed. */
3533 if (TREE_CODE (TYPE_SIZE (TREE_TYPE (decl))) != INTEGER_CST
3534 || C_DECL_VARIABLE_SIZE (decl))
3536 error ("variable-sized object may not be initialized");
3540 else if (TREE_CODE (TREE_TYPE (decl)) != ARRAY_TYPE)
3542 error ("variable `%s' has initializer but incomplete type",
3543 IDENTIFIER_POINTER (DECL_NAME (decl)));
3546 else if (!COMPLETE_TYPE_P (TREE_TYPE (TREE_TYPE (decl))))
3548 error ("elements of array `%s' have incomplete type",
3549 IDENTIFIER_POINTER (DECL_NAME (decl)));
3557 /* Seems redundant with grokdeclarator. */
3558 if (current_binding_level != global_binding_level
3559 && DECL_EXTERNAL (decl)
3560 && TREE_CODE (decl) != FUNCTION_DECL)
3561 warning ("declaration of `%s' has `extern' and is initialized",
3562 IDENTIFIER_POINTER (DECL_NAME (decl)));
3564 DECL_EXTERNAL (decl) = 0;
3565 if (current_binding_level == global_binding_level)
3566 TREE_STATIC (decl) = 1;
3568 /* Tell `pushdecl' this is an initialized decl
3569 even though we don't yet have the initializer expression.
3570 Also tell `finish_decl' it may store the real initializer. */
3571 DECL_INITIAL (decl) = error_mark_node;
3574 /* If this is a function declaration, write a record describing it to the
3575 prototypes file (if requested). */
3577 if (TREE_CODE (decl) == FUNCTION_DECL)
3578 gen_aux_info_record (decl, 0, 0, TYPE_ARG_TYPES (TREE_TYPE (decl)) != 0);
3580 /* ANSI specifies that a tentative definition which is not merged with
3581 a non-tentative definition behaves exactly like a definition with an
3582 initializer equal to zero. (Section 3.7.2)
3583 -fno-common gives strict ANSI behavior. Usually you don't want it.
3584 This matters only for variables with external linkage. */
3585 if (! flag_no_common || ! TREE_PUBLIC (decl))
3586 DECL_COMMON (decl) = 1;
3588 #ifdef SET_DEFAULT_DECL_ATTRIBUTES
3589 SET_DEFAULT_DECL_ATTRIBUTES (decl, attributes);
3592 /* Set attributes here so if duplicate decl, will have proper attributes. */
3593 decl_attributes (decl, attributes, prefix_attributes);
3595 /* Add this decl to the current binding level.
3596 TEM may equal DECL or it may be a previous decl of the same name. */
3597 tem = pushdecl (decl);
3599 /* For a local variable, define the RTL now. */
3600 if (current_binding_level != global_binding_level
3601 /* But not if this is a duplicate decl
3602 and we preserved the rtl from the previous one
3603 (which may or may not happen). */
3604 && DECL_RTL (tem) == 0
3605 && !DECL_CONTEXT (tem))
3607 if (TREE_TYPE (tem) != error_mark_node
3608 && COMPLETE_TYPE_P (TREE_TYPE (tem)))
3610 else if (TREE_CODE (TREE_TYPE (tem)) == ARRAY_TYPE
3611 && DECL_INITIAL (tem) != 0)
3618 /* Finish processing of a declaration;
3619 install its initial value.
3620 If the length of an array type is not known before,
3621 it must be determined now, from the initial value, or it is an error. */
3624 finish_decl (decl, init, asmspec_tree)
3628 register tree type = TREE_TYPE (decl);
3629 int was_incomplete = (DECL_SIZE (decl) == 0);
3630 const char *asmspec = 0;
3632 /* If a name was specified, get the string. */
3634 asmspec = TREE_STRING_POINTER (asmspec_tree);
3636 /* If `start_decl' didn't like having an initialization, ignore it now. */
3638 if (init != 0 && DECL_INITIAL (decl) == 0)
3640 /* Don't crash if parm is initialized. */
3641 if (TREE_CODE (decl) == PARM_DECL)
3646 if (TREE_CODE (decl) != TYPE_DECL)
3647 store_init_value (decl, init);
3650 /* typedef foo = bar; store the type of bar as the type of foo. */
3651 TREE_TYPE (decl) = TREE_TYPE (init);
3652 DECL_INITIAL (decl) = init = 0;
3656 /* Deduce size of array from initialization, if not already known */
3658 if (TREE_CODE (type) == ARRAY_TYPE
3659 && TYPE_DOMAIN (type) == 0
3660 && TREE_CODE (decl) != TYPE_DECL)
3663 = (TREE_STATIC (decl)
3664 /* Even if pedantic, an external linkage array
3665 may have incomplete type at first. */
3666 ? pedantic && !TREE_PUBLIC (decl)
3667 : !DECL_EXTERNAL (decl));
3669 = complete_array_type (type, DECL_INITIAL (decl), do_default);
3671 /* Get the completed type made by complete_array_type. */
3672 type = TREE_TYPE (decl);
3675 error_with_decl (decl, "initializer fails to determine size of `%s'");
3677 else if (failure == 2)
3680 error_with_decl (decl, "array size missing in `%s'");
3681 /* If a `static' var's size isn't known,
3682 make it extern as well as static, so it does not get
3684 If it is not `static', then do not mark extern;
3685 finish_incomplete_decl will give it a default size
3686 and it will get allocated. */
3687 else if (!pedantic && TREE_STATIC (decl) && ! TREE_PUBLIC (decl))
3688 DECL_EXTERNAL (decl) = 1;
3691 /* TYPE_MAX_VALUE is always one less than the number of elements
3692 in the array, because we start counting at zero. Therefore,
3693 warn only if the value is less than zero. */
3694 else if (pedantic && TYPE_DOMAIN (type) != 0
3695 && tree_int_cst_sgn (TYPE_MAX_VALUE (TYPE_DOMAIN (type))) < 0)
3696 error_with_decl (decl, "zero or negative size array `%s'");
3698 layout_decl (decl, 0);
3701 if (TREE_CODE (decl) == VAR_DECL)
3703 if (DECL_SIZE (decl) == 0 && TREE_TYPE (decl) != error_mark_node
3704 && COMPLETE_TYPE_P (TREE_TYPE (decl)))
3705 layout_decl (decl, 0);
3707 if (DECL_SIZE (decl) == 0
3708 /* Don't give an error if we already gave one earlier. */
3709 && TREE_TYPE (decl) != error_mark_node
3710 && (TREE_STATIC (decl)
3712 /* A static variable with an incomplete type
3713 is an error if it is initialized.
3714 Also if it is not file scope.
3715 Otherwise, let it through, but if it is not `extern'
3716 then it may cause an error message later. */
3717 (DECL_INITIAL (decl) != 0
3718 || DECL_CONTEXT (decl) != 0)
3720 /* An automatic variable with an incomplete type
3722 !DECL_EXTERNAL (decl)))
3724 error_with_decl (decl, "storage size of `%s' isn't known");
3725 TREE_TYPE (decl) = error_mark_node;
3728 if ((DECL_EXTERNAL (decl) || TREE_STATIC (decl))
3729 && DECL_SIZE (decl) != 0)
3731 if (TREE_CODE (DECL_SIZE (decl)) == INTEGER_CST)
3732 constant_expression_warning (DECL_SIZE (decl));
3734 error_with_decl (decl, "storage size of `%s' isn't constant");
3737 if (TREE_USED (type))
3738 TREE_USED (decl) = 1;
3741 /* If this is a function and an assembler name is specified, it isn't
3742 builtin any more. Also reset DECL_RTL so we can give it its new
3744 if (TREE_CODE (decl) == FUNCTION_DECL && asmspec)
3746 DECL_BUILT_IN_CLASS (decl) = NOT_BUILT_IN;
3747 DECL_RTL (decl) = 0;
3748 DECL_ASSEMBLER_NAME (decl) = get_identifier (asmspec);
3751 /* Output the assembler code and/or RTL code for variables and functions,
3752 unless the type is an undefined structure or union.
3753 If not, it will get done when the type is completed. */
3755 if (TREE_CODE (decl) == VAR_DECL || TREE_CODE (decl) == FUNCTION_DECL)
3757 /* This is a no-op in c-lang.c or something real in objc-actions.c. */
3758 maybe_objc_check_decl (decl);
3760 if (!DECL_CONTEXT (decl))
3761 rest_of_decl_compilation (decl, asmspec,
3762 (DECL_CONTEXT (decl) == 0
3763 || TREE_ASM_WRITTEN (decl)), 0);
3768 DECL_ASSEMBLER_NAME (decl) = get_identifier (asmspec);
3769 DECL_C_HARD_REGISTER (decl) = 1;
3771 add_decl_stmt (decl);
3774 if (DECL_CONTEXT (decl) != 0)
3776 /* Recompute the RTL of a local array now
3777 if it used to be an incomplete type. */
3779 && ! TREE_STATIC (decl) && ! DECL_EXTERNAL (decl))
3781 /* If we used it already as memory, it must stay in memory. */
3782 TREE_ADDRESSABLE (decl) = TREE_USED (decl);
3783 /* If it's still incomplete now, no init will save it. */
3784 if (DECL_SIZE (decl) == 0)
3785 DECL_INITIAL (decl) = 0;
3790 if (TREE_CODE (decl) == TYPE_DECL)
3792 /* This is a no-op in c-lang.c or something real in objc-actions.c. */
3793 maybe_objc_check_decl (decl);
3794 rest_of_decl_compilation (decl, NULL_PTR, DECL_CONTEXT (decl) == 0, 0);
3797 /* At the end of a declaration, throw away any variable type sizes
3798 of types defined inside that declaration. There is no use
3799 computing them in the following function definition. */
3800 if (current_binding_level == global_binding_level)
3801 get_pending_sizes ();
3804 /* If DECL has a cleanup, build and return that cleanup here.
3805 This is a callback called by expand_expr. */
3808 maybe_build_cleanup (decl)
3809 tree decl ATTRIBUTE_UNUSED;
3811 /* There are no cleanups in C. */
3815 /* Given a parsed parameter declaration,
3816 decode it into a PARM_DECL and push that on the current binding level.
3817 Also, for the sake of forward parm decls,
3818 record the given order of parms in `parm_order'. */
3821 push_parm_decl (parm)
3825 int old_immediate_size_expand = immediate_size_expand;
3826 /* Don't try computing parm sizes now -- wait till fn is called. */
3827 immediate_size_expand = 0;
3829 decl = grokdeclarator (TREE_VALUE (TREE_PURPOSE (parm)),
3830 TREE_PURPOSE (TREE_PURPOSE (parm)), PARM, 0);
3831 decl_attributes (decl, TREE_VALUE (TREE_VALUE (parm)),
3832 TREE_PURPOSE (TREE_VALUE (parm)));
3835 if (DECL_NAME (decl))
3838 olddecl = lookup_name (DECL_NAME (decl));
3839 if (pedantic && olddecl != 0 && TREE_CODE (olddecl) == TYPE_DECL)
3840 pedwarn_with_decl (decl,
3841 "ANSI C forbids parameter `%s' shadowing typedef");
3845 decl = pushdecl (decl);
3847 immediate_size_expand = old_immediate_size_expand;
3849 current_binding_level->parm_order
3850 = tree_cons (NULL_TREE, decl, current_binding_level->parm_order);
3852 /* Add this decl to the current binding level. */
3853 finish_decl (decl, NULL_TREE, NULL_TREE);
3856 /* Clear the given order of parms in `parm_order'.
3857 Used at start of parm list,
3858 and also at semicolon terminating forward decls. */
3863 current_binding_level->parm_order = NULL_TREE;
3866 /* Make TYPE a complete type based on INITIAL_VALUE.
3867 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
3868 2 if there was no information (in which case assume 1 if DO_DEFAULT). */
3871 complete_array_type (type, initial_value, do_default)
3876 register tree maxindex = NULL_TREE;
3881 /* Note MAXINDEX is really the maximum index,
3882 one less than the size. */
3883 if (TREE_CODE (initial_value) == STRING_CST)
3886 = int_size_in_bytes (TREE_TYPE (TREE_TYPE (initial_value)));
3887 maxindex = build_int_2 ((TREE_STRING_LENGTH (initial_value)
3890 else if (TREE_CODE (initial_value) == CONSTRUCTOR)
3892 tree elts = CONSTRUCTOR_ELTS (initial_value);
3893 maxindex = build_int_2 (-1, -1);
3894 for (; elts; elts = TREE_CHAIN (elts))
3896 if (TREE_PURPOSE (elts))
3897 maxindex = TREE_PURPOSE (elts);
3899 maxindex = fold (build (PLUS_EXPR, integer_type_node,
3900 maxindex, integer_one_node));
3902 maxindex = copy_node (maxindex);
3906 /* Make an error message unless that happened already. */
3907 if (initial_value != error_mark_node)
3910 /* Prevent further error messages. */
3911 maxindex = build_int_2 (0, 0);
3918 maxindex = build_int_2 (0, 0);
3924 TYPE_DOMAIN (type) = build_index_type (maxindex);
3925 if (!TREE_TYPE (maxindex))
3926 TREE_TYPE (maxindex) = TYPE_DOMAIN (type);
3929 /* Lay out the type now that we can get the real answer. */
3936 /* Given declspecs and a declarator,
3937 determine the name and type of the object declared
3938 and construct a ..._DECL node for it.
3939 (In one case we can return a ..._TYPE node instead.
3940 For invalid input we sometimes return 0.)
3942 DECLSPECS is a chain of tree_list nodes whose value fields
3943 are the storage classes and type specifiers.
3945 DECL_CONTEXT says which syntactic context this declaration is in:
3946 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
3947 FUNCDEF for a function definition. Like NORMAL but a few different
3948 error messages in each case. Return value may be zero meaning
3949 this definition is too screwy to try to parse.
3950 PARM for a parameter declaration (either within a function prototype
3951 or before a function body). Make a PARM_DECL, or return void_type_node.
3952 TYPENAME if for a typename (in a cast or sizeof).
3953 Don't make a DECL node; just return the ..._TYPE node.
3954 FIELD for a struct or union field; make a FIELD_DECL.
3955 BITFIELD for a field with specified width.
3956 INITIALIZED is 1 if the decl has an initializer.
3958 In the TYPENAME case, DECLARATOR is really an absolute declarator.
3959 It may also be so in the PARM case, for a prototype where the
3960 argument type is specified but not the name.
3962 This function is where the complicated C meanings of `static'
3963 and `extern' are interpreted. */
3966 grokdeclarator (declarator, declspecs, decl_context, initialized)
3969 enum decl_context decl_context;
3974 tree type = NULL_TREE;
3979 int type_quals = TYPE_UNQUALIFIED;
3981 int explicit_int = 0;
3982 int explicit_char = 0;
3983 int defaulted_int = 0;
3984 tree typedef_decl = 0;
3986 tree typedef_type = 0;
3987 int funcdef_flag = 0;
3988 enum tree_code innermost_code = ERROR_MARK;
3990 int size_varies = 0;
3991 tree decl_machine_attr = NULL_TREE;
3993 if (decl_context == BITFIELD)
3994 bitfield = 1, decl_context = FIELD;
3996 if (decl_context == FUNCDEF)
3997 funcdef_flag = 1, decl_context = NORMAL;
3999 /* Look inside a declarator for the name being declared
4000 and get it as a string, for an error message. */
4002 register tree decl = declarator;
4006 switch (TREE_CODE (decl))
4011 innermost_code = TREE_CODE (decl);
4012 decl = TREE_OPERAND (decl, 0);
4015 case IDENTIFIER_NODE:
4016 name = IDENTIFIER_POINTER (decl);
4027 /* A function definition's declarator must have the form of
4028 a function declarator. */
4030 if (funcdef_flag && innermost_code != CALL_EXPR)
4033 /* Anything declared one level down from the top level
4034 must be one of the parameters of a function
4035 (because the body is at least two levels down). */
4037 /* If this looks like a function definition, make it one,
4038 even if it occurs where parms are expected.
4039 Then store_parm_decls will reject it and not use it as a parm. */
4040 if (decl_context == NORMAL && !funcdef_flag
4041 && current_binding_level->parm_flag)
4042 decl_context = PARM;
4044 /* Look through the decl specs and record which ones appear.
4045 Some typespecs are defined as built-in typenames.
4046 Others, the ones that are modifiers of other types,
4047 are represented by bits in SPECBITS: set the bits for
4048 the modifiers that appear. Storage class keywords are also in SPECBITS.
4050 If there is a typedef name or a type, store the type in TYPE.
4051 This includes builtin typedefs such as `int'.
4053 Set EXPLICIT_INT or EXPLICIT_CHAR if the type is `int' or `char'
4054 and did not come from a user typedef.
4056 Set LONGLONG if `long' is mentioned twice. */
4058 for (spec = declspecs; spec; spec = TREE_CHAIN (spec))
4060 register tree id = TREE_VALUE (spec);
4062 if (id == ridpointers[(int) RID_INT])
4064 if (id == ridpointers[(int) RID_CHAR])
4067 if (TREE_CODE (id) == IDENTIFIER_NODE && C_IS_RESERVED_WORD (id))
4069 enum rid i = C_RID_CODE (id);
4070 if (i <= RID_LAST_MODIFIER)
4072 if (i == RID_LONG && specbits & (1<<i))
4075 error ("`long long long' is too long for GCC");
4078 if (pedantic && !flag_isoc99 && ! in_system_header
4080 pedwarn ("ISO C89 does not support `long long'");
4084 else if (specbits & (1 << i))
4085 pedwarn ("duplicate `%s'", IDENTIFIER_POINTER (id));
4091 error ("two or more data types in declaration of `%s'", name);
4092 /* Actual typedefs come to us as TYPE_DECL nodes. */
4093 else if (TREE_CODE (id) == TYPE_DECL)
4095 type = TREE_TYPE (id);
4096 decl_machine_attr = DECL_MACHINE_ATTRIBUTES (id);
4099 /* Built-in types come as identifiers. */
4100 else if (TREE_CODE (id) == IDENTIFIER_NODE)
4102 register tree t = lookup_name (id);
4103 if (TREE_TYPE (t) == error_mark_node)
4105 else if (!t || TREE_CODE (t) != TYPE_DECL)
4106 error ("`%s' fails to be a typedef or built in type",
4107 IDENTIFIER_POINTER (id));
4110 type = TREE_TYPE (t);
4114 else if (TREE_CODE (id) != ERROR_MARK)
4121 typedef_type = type;
4123 size_varies = C_TYPE_VARIABLE_SIZE (type);
4125 /* No type at all: default to `int', and set DEFAULTED_INT
4126 because it was not a user-defined typedef. */
4130 if ((! (specbits & ((1 << (int) RID_LONG) | (1 << (int) RID_SHORT)
4131 | (1 << (int) RID_SIGNED)
4132 | (1 << (int) RID_UNSIGNED)
4133 | (1 << (int) RID_COMPLEX))))
4134 /* Don't warn about typedef foo = bar. */
4135 && ! (specbits & (1 << (int) RID_TYPEDEF) && initialized)
4136 && ! in_system_header)
4138 /* Issue a warning if this is an ISO C 99 program or if -Wreturn-type
4139 and this is a function, or if -Wimplicit; prefer the former
4140 warning since it is more explicit. */
4141 if ((warn_implicit_int || warn_return_type) && funcdef_flag)
4142 warn_about_return_type = 1;
4143 else if (warn_implicit_int || flag_isoc99)
4144 pedwarn_c99 ("type defaults to `int' in declaration of `%s'",
4149 type = integer_type_node;
4152 /* Now process the modifiers that were specified
4153 and check for invalid combinations. */
4155 /* Long double is a special combination. */
4157 if ((specbits & 1 << (int) RID_LONG) && ! longlong
4158 && TYPE_MAIN_VARIANT (type) == double_type_node)
4160 specbits &= ~(1 << (int) RID_LONG);
4161 type = long_double_type_node;
4164 /* Check all other uses of type modifiers. */
4166 if (specbits & ((1 << (int) RID_LONG) | (1 << (int) RID_SHORT)
4167 | (1 << (int) RID_UNSIGNED) | (1 << (int) RID_SIGNED)))
4171 if ((specbits & 1 << (int) RID_LONG)
4172 && (specbits & 1 << (int) RID_SHORT))
4173 error ("both long and short specified for `%s'", name);
4174 else if (((specbits & 1 << (int) RID_LONG)
4175 || (specbits & 1 << (int) RID_SHORT))
4177 error ("long or short specified with char for `%s'", name);
4178 else if (((specbits & 1 << (int) RID_LONG)
4179 || (specbits & 1 << (int) RID_SHORT))
4180 && TREE_CODE (type) == REAL_TYPE)
4182 static int already = 0;
4184 error ("long or short specified with floating type for `%s'", name);
4185 if (! already && ! pedantic)
4187 error ("the only valid combination is `long double'");
4191 else if ((specbits & 1 << (int) RID_SIGNED)
4192 && (specbits & 1 << (int) RID_UNSIGNED))
4193 error ("both signed and unsigned specified for `%s'", name);
4194 else if (TREE_CODE (type) != INTEGER_TYPE)
4195 error ("long, short, signed or unsigned invalid for `%s'", name);
4199 if (!explicit_int && !defaulted_int && !explicit_char && pedantic)
4201 pedwarn ("long, short, signed or unsigned used invalidly for `%s'",
4203 if (flag_pedantic_errors)
4208 /* Discard the type modifiers if they are invalid. */
4211 specbits &= ~((1 << (int) RID_LONG) | (1 << (int) RID_SHORT)
4212 | (1 << (int) RID_UNSIGNED) | (1 << (int) RID_SIGNED));
4217 if ((specbits & (1 << (int) RID_COMPLEX))
4218 && TREE_CODE (type) != INTEGER_TYPE && TREE_CODE (type) != REAL_TYPE)
4220 error ("complex invalid for `%s'", name);
4221 specbits &= ~(1 << (int) RID_COMPLEX);
4224 /* Decide whether an integer type is signed or not.
4225 Optionally treat bitfields as signed by default. */
4226 if (specbits & 1 << (int) RID_UNSIGNED
4227 /* Traditionally, all bitfields are unsigned. */
4228 || (bitfield && flag_traditional
4229 && (! explicit_flag_signed_bitfields || !flag_signed_bitfields))
4230 || (bitfield && ! flag_signed_bitfields
4231 && (explicit_int || defaulted_int || explicit_char
4232 /* A typedef for plain `int' without `signed'
4233 can be controlled just like plain `int'. */
4234 || ! (typedef_decl != 0
4235 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl)))
4236 && TREE_CODE (type) != ENUMERAL_TYPE
4237 && !(specbits & 1 << (int) RID_SIGNED)))
4240 type = long_long_unsigned_type_node;
4241 else if (specbits & 1 << (int) RID_LONG)
4242 type = long_unsigned_type_node;
4243 else if (specbits & 1 << (int) RID_SHORT)
4244 type = short_unsigned_type_node;
4245 else if (type == char_type_node)
4246 type = unsigned_char_type_node;
4247 else if (typedef_decl)
4248 type = unsigned_type (type);
4250 type = unsigned_type_node;
4252 else if ((specbits & 1 << (int) RID_SIGNED)
4253 && type == char_type_node)
4254 type = signed_char_type_node;
4256 type = long_long_integer_type_node;
4257 else if (specbits & 1 << (int) RID_LONG)
4258 type = long_integer_type_node;
4259 else if (specbits & 1 << (int) RID_SHORT)
4260 type = short_integer_type_node;
4262 if (specbits & 1 << (int) RID_COMPLEX)
4264 if (pedantic && !flag_isoc99)
4265 pedwarn ("ISO C89 does not support complex types");
4266 /* If we just have "complex", it is equivalent to
4267 "complex double", but if any modifiers at all are specified it is
4268 the complex form of TYPE. E.g, "complex short" is
4269 "complex short int". */
4271 if (defaulted_int && ! longlong
4272 && ! (specbits & ((1 << (int) RID_LONG) | (1 << (int) RID_SHORT)
4273 | (1 << (int) RID_SIGNED)
4274 | (1 << (int) RID_UNSIGNED))))
4277 pedwarn ("ISO C does not support plain `complex' meaning `double complex'");
4278 type = complex_double_type_node;
4280 else if (type == integer_type_node)
4283 pedwarn ("ISO C does not support complex integer types");
4284 type = complex_integer_type_node;
4286 else if (type == float_type_node)
4287 type = complex_float_type_node;
4288 else if (type == double_type_node)
4289 type = complex_double_type_node;
4290 else if (type == long_double_type_node)
4291 type = complex_long_double_type_node;
4295 pedwarn ("ISO C does not support complex integer types");
4296 type = build_complex_type (type);
4300 /* Figure out the type qualifiers for the declaration. There are
4301 two ways a declaration can become qualified. One is something
4302 like `const int i' where the `const' is explicit. Another is
4303 something like `typedef const int CI; CI i' where the type of the
4304 declaration contains the `const'. */
4305 constp = !! (specbits & 1 << (int) RID_CONST) + TYPE_READONLY (type);
4306 restrictp = !! (specbits & 1 << (int) RID_RESTRICT) + TYPE_RESTRICT (type);
4307 volatilep = !! (specbits & 1 << (int) RID_VOLATILE) + TYPE_VOLATILE (type);
4308 inlinep = !! (specbits & (1 << (int) RID_INLINE));
4309 if (constp > 1 && ! flag_isoc99)
4310 pedwarn ("duplicate `const'");
4311 if (restrictp > 1 && ! flag_isoc99)
4312 pedwarn ("duplicate `restrict'");
4313 if (volatilep > 1 && ! flag_isoc99)
4314 pedwarn ("duplicate `volatile'");
4315 if (! flag_gen_aux_info && (TYPE_QUALS (type)))
4316 type = TYPE_MAIN_VARIANT (type);
4317 type_quals = ((constp ? TYPE_QUAL_CONST : 0)
4318 | (restrictp ? TYPE_QUAL_RESTRICT : 0)
4319 | (volatilep ? TYPE_QUAL_VOLATILE : 0));
4321 /* Warn if two storage classes are given. Default to `auto'. */
4326 if (specbits & 1 << (int) RID_AUTO) nclasses++;
4327 if (specbits & 1 << (int) RID_STATIC) nclasses++;
4328 if (specbits & 1 << (int) RID_EXTERN) nclasses++;
4329 if (specbits & 1 << (int) RID_REGISTER) nclasses++;
4330 if (specbits & 1 << (int) RID_TYPEDEF) nclasses++;
4332 /* Warn about storage classes that are invalid for certain
4333 kinds of declarations (parameters, typenames, etc.). */
4336 error ("multiple storage classes in declaration of `%s'", name);
4337 else if (funcdef_flag
4339 & ((1 << (int) RID_REGISTER)
4340 | (1 << (int) RID_AUTO)
4341 | (1 << (int) RID_TYPEDEF))))
4343 if (specbits & 1 << (int) RID_AUTO
4344 && (pedantic || current_binding_level == global_binding_level))
4345 pedwarn ("function definition declared `auto'");
4346 if (specbits & 1 << (int) RID_REGISTER)
4347 error ("function definition declared `register'");
4348 if (specbits & 1 << (int) RID_TYPEDEF)
4349 error ("function definition declared `typedef'");
4350 specbits &= ~((1 << (int) RID_TYPEDEF) | (1 << (int) RID_REGISTER)
4351 | (1 << (int) RID_AUTO));
4353 else if (decl_context != NORMAL && nclasses > 0)
4355 if (decl_context == PARM && specbits & 1 << (int) RID_REGISTER)
4359 switch (decl_context)
4362 error ("storage class specified for structure field `%s'",
4366 error ("storage class specified for parameter `%s'", name);
4369 error ("storage class specified for typename");
4372 specbits &= ~((1 << (int) RID_TYPEDEF) | (1 << (int) RID_REGISTER)
4373 | (1 << (int) RID_AUTO) | (1 << (int) RID_STATIC)
4374 | (1 << (int) RID_EXTERN));
4377 else if (specbits & 1 << (int) RID_EXTERN && initialized && ! funcdef_flag)
4379 /* `extern' with initialization is invalid if not at top level. */
4380 if (current_binding_level == global_binding_level)
4381 warning ("`%s' initialized and declared `extern'", name);
4383 error ("`%s' has both `extern' and initializer", name);
4385 else if (specbits & 1 << (int) RID_EXTERN && funcdef_flag
4386 && current_binding_level != global_binding_level)
4387 error ("nested function `%s' declared `extern'", name);
4388 else if (current_binding_level == global_binding_level
4389 && specbits & (1 << (int) RID_AUTO))
4390 error ("top-level declaration of `%s' specifies `auto'", name);
4393 /* Now figure out the structure of the declarator proper.
4394 Descend through it, creating more complex types, until we reach
4395 the declared identifier (or NULL_TREE, in an absolute declarator). */
4397 while (declarator && TREE_CODE (declarator) != IDENTIFIER_NODE)
4399 if (type == error_mark_node)
4401 declarator = TREE_OPERAND (declarator, 0);
4405 /* Each level of DECLARATOR is either an ARRAY_REF (for ...[..]),
4406 an INDIRECT_REF (for *...),
4407 a CALL_EXPR (for ...(...)),
4408 an identifier (for the name being declared)
4409 or a null pointer (for the place in an absolute declarator
4410 where the name was omitted).
4411 For the last two cases, we have just exited the loop.
4413 At this point, TYPE is the type of elements of an array,
4414 or for a function to return, or for a pointer to point to.
4415 After this sequence of ifs, TYPE is the type of the
4416 array or function or pointer, and DECLARATOR has had its
4417 outermost layer removed. */
4419 if (TREE_CODE (declarator) == ARRAY_REF)
4421 register tree itype = NULL_TREE;
4422 register tree size = TREE_OPERAND (declarator, 1);
4423 /* The index is a signed object `sizetype' bits wide. */
4424 tree index_type = signed_type (sizetype);
4426 declarator = TREE_OPERAND (declarator, 0);
4428 /* Check for some types that there cannot be arrays of. */
4430 if (VOID_TYPE_P (type))
4432 error ("declaration of `%s' as array of voids", name);
4433 type = error_mark_node;
4436 if (TREE_CODE (type) == FUNCTION_TYPE)
4438 error ("declaration of `%s' as array of functions", name);
4439 type = error_mark_node;
4442 if (size == error_mark_node)
4443 type = error_mark_node;
4445 if (type == error_mark_node)
4448 /* If size was specified, set ITYPE to a range-type for that size.
4449 Otherwise, ITYPE remains null. finish_decl may figure it out
4450 from an initial value. */
4454 /* Strip NON_LVALUE_EXPRs since we aren't using as an lvalue. */
4455 STRIP_TYPE_NOPS (size);
4457 if (TREE_CODE (TREE_TYPE (size)) != INTEGER_TYPE
4458 && TREE_CODE (TREE_TYPE (size)) != ENUMERAL_TYPE)
4460 error ("size of array `%s' has non-integer type", name);
4461 size = integer_one_node;
4464 if (pedantic && integer_zerop (size))
4465 pedwarn ("ISO C forbids zero-size array `%s'", name);
4467 if (TREE_CODE (size) == INTEGER_CST)
4469 constant_expression_warning (size);
4470 if (tree_int_cst_sgn (size) < 0)
4472 error ("size of array `%s' is negative", name);
4473 size = integer_one_node;
4478 /* Make sure the array size remains visibly nonconstant
4479 even if it is (eg) a const variable with known value. */
4484 if (TREE_CONSTANT (size))
4485 pedwarn ("ISO C89 forbids array `%s' whose size can't be evaluated",
4488 pedwarn ("ISO C89 forbids variable-size array `%s'",
4493 if (integer_zerop (size))
4495 /* A zero-length array cannot be represented with an
4496 unsigned index type, which is what we'll get with
4497 build_index_type. Create an open-ended range instead. */
4498 itype = build_range_type (sizetype, size, NULL_TREE);
4502 /* Compute the maximum valid index, that is, size - 1.
4503 Do the calculation in index_type, so that if it is
4504 a variable the computations will be done in the
4506 itype = fold (build (MINUS_EXPR, index_type,
4507 convert (index_type, size),
4508 convert (index_type, size_one_node)));
4510 /* If that overflowed, the array is too big.
4511 ??? While a size of INT_MAX+1 technically shouldn't
4512 cause an overflow (because we subtract 1), the overflow
4513 is recorded during the conversion to index_type, before
4514 the subtraction. Handling this case seems like an
4515 unnecessary complication. */
4516 if (TREE_OVERFLOW (itype))
4518 error ("size of array `%s' is too large", name);
4519 type = error_mark_node;
4524 itype = variable_size (itype);
4525 itype = build_index_type (itype);
4528 else if (decl_context == FIELD)
4530 /* ??? Need to check somewhere that this is a structure
4531 and not a union, that this field is last, and that
4532 this structure has at least one other named member. */
4534 if (pedantic && !flag_isoc99 && !in_system_header)
4535 pedwarn ("ISO C89 does not support flexible array members");
4537 /* ISO C99 Flexible array members are effectively identical
4538 to GCC's zero-length array extension. */
4539 itype = build_range_type (sizetype, size_zero_node, NULL_TREE);
4543 /* This had bad results for pointers to arrays, as in
4544 union incomplete (*foo)[4]; */
4545 /* Complain about arrays of incomplete types, except in typedefs. */
4547 if (!COMPLETE_TYPE_P (type)
4548 /* Avoid multiple warnings for nested array types. */
4549 && TREE_CODE (type) != ARRAY_TYPE
4550 && !(specbits & (1 << (int) RID_TYPEDEF))
4551 && !C_TYPE_BEING_DEFINED (type))
4552 warning ("array type has incomplete element type");
4556 /* We shouldn't have a function type here at all!
4557 Functions aren't allowed as array elements. */
4558 if (pedantic && TREE_CODE (type) == FUNCTION_TYPE
4559 && (constp || volatilep))
4560 pedwarn ("ANSI C forbids const or volatile function types");
4563 /* Build the array type itself, then merge any constancy or
4564 volatility into the target type. We must do it in this order
4565 to ensure that the TYPE_MAIN_VARIANT field of the array type
4566 is set correctly. */
4568 type = build_array_type (type, itype);
4570 type = c_build_qualified_type (type, type_quals);
4573 /* Don't clear these; leave them set so that the array type
4574 or the variable is itself const or volatile. */
4575 type_quals = TYPE_UNQUALIFIED;
4579 C_TYPE_VARIABLE_SIZE (type) = 1;
4581 else if (TREE_CODE (declarator) == CALL_EXPR)
4585 /* Declaring a function type.
4586 Make sure we have a valid type for the function to return. */
4587 if (type == error_mark_node)
4592 /* Warn about some types functions can't return. */
4594 if (TREE_CODE (type) == FUNCTION_TYPE)
4596 error ("`%s' declared as function returning a function", name);
4597 type = integer_type_node;
4599 if (TREE_CODE (type) == ARRAY_TYPE)
4601 error ("`%s' declared as function returning an array", name);
4602 type = integer_type_node;
4605 #ifndef TRADITIONAL_RETURN_FLOAT
4606 /* Traditionally, declaring return type float means double. */
4608 if (flag_traditional && TYPE_MAIN_VARIANT (type) == float_type_node)
4609 type = double_type_node;
4610 #endif /* TRADITIONAL_RETURN_FLOAT */
4612 /* Construct the function type and go to the next
4613 inner layer of declarator. */
4615 arg_types = grokparms (TREE_OPERAND (declarator, 1),
4617 /* Say it's a definition
4618 only for the CALL_EXPR
4619 closest to the identifier. */
4620 && TREE_CODE (TREE_OPERAND (declarator, 0)) == IDENTIFIER_NODE);
4621 /* Type qualifiers before the return type of the function
4622 qualify the return type, not the function type. */
4625 /* Type qualifiers on a function return type are normally
4626 permitted by the standard but have no effect, so give a
4627 warning at -W. Qualifiers on a void return type have
4628 meaning as a GNU extension, and are banned on function
4629 definitions in ISO C. FIXME: strictly we shouldn't
4630 pedwarn for qualified void return types except on function
4631 definitions, but not doing so could lead to the undesirable
4632 state of a "volatile void" function return type not being
4633 warned about, and a use of the function being compiled
4634 with GNU semantics, with no diagnostics under -pedantic. */
4635 if (VOID_TYPE_P (type) && pedantic && !in_system_header)
4636 pedwarn ("ISO C forbids qualified void function return type");
4637 else if (extra_warnings
4638 && !(VOID_TYPE_P (type)
4639 && type_quals == TYPE_QUAL_VOLATILE))
4640 warning ("type qualifiers ignored on function return type");
4642 type = c_build_qualified_type (type, type_quals);
4644 type_quals = TYPE_UNQUALIFIED;
4646 type = build_function_type (type, arg_types);
4647 declarator = TREE_OPERAND (declarator, 0);
4649 /* Set the TYPE_CONTEXTs for each tagged type which is local to
4650 the formal parameter list of this FUNCTION_TYPE to point to
4651 the FUNCTION_TYPE node itself. */
4656 for (link = last_function_parm_tags;
4658 link = TREE_CHAIN (link))
4659 TYPE_CONTEXT (TREE_VALUE (link)) = type;
4662 else if (TREE_CODE (declarator) == INDIRECT_REF)
4664 /* Merge any constancy or volatility into the target type
4667 if (pedantic && TREE_CODE (type) == FUNCTION_TYPE
4669 pedwarn ("ISO C forbids qualified function types");
4671 type = c_build_qualified_type (type, type_quals);
4672 type_quals = TYPE_UNQUALIFIED;
4675 type = build_pointer_type (type);
4677 /* Process a list of type modifier keywords
4678 (such as const or volatile) that were given inside the `*'. */
4680 if (TREE_TYPE (declarator))
4682 register tree typemodlist;
4688 for (typemodlist = TREE_TYPE (declarator); typemodlist;
4689 typemodlist = TREE_CHAIN (typemodlist))
4691 tree qualifier = TREE_VALUE (typemodlist);
4693 if (C_IS_RESERVED_WORD (qualifier))
4695 if (C_RID_CODE (qualifier) == RID_CONST)
4697 else if (C_RID_CODE (qualifier) == RID_VOLATILE)
4699 else if (C_RID_CODE (qualifier) == RID_RESTRICT)
4709 error ("invalid type modifier within pointer declarator");
4710 if (constp > 1 && ! flag_isoc99)
4711 pedwarn ("duplicate `const'");
4712 if (volatilep > 1 && ! flag_isoc99)
4713 pedwarn ("duplicate `volatile'");
4714 if (restrictp > 1 && ! flag_isoc99)
4715 pedwarn ("duplicate `restrict'");
4717 type_quals = ((constp ? TYPE_QUAL_CONST : 0)
4718 | (restrictp ? TYPE_QUAL_RESTRICT : 0)
4719 | (volatilep ? TYPE_QUAL_VOLATILE : 0));
4722 declarator = TREE_OPERAND (declarator, 0);
4729 /* Now TYPE has the actual type. */
4731 /* Did array size calculations overflow? */
4733 if (TREE_CODE (type) == ARRAY_TYPE
4734 && COMPLETE_TYPE_P (type)
4735 && TREE_OVERFLOW (TYPE_SIZE (type)))
4736 error ("size of array `%s' is too large", name);
4738 /* If this is declaring a typedef name, return a TYPE_DECL. */
4740 if (specbits & (1 << (int) RID_TYPEDEF))
4743 /* Note that the grammar rejects storage classes
4744 in typenames, fields or parameters */
4745 if (pedantic && TREE_CODE (type) == FUNCTION_TYPE
4747 pedwarn ("ISO C forbids qualified function types");
4749 type = c_build_qualified_type (type, type_quals);
4750 decl = build_decl (TYPE_DECL, declarator, type);
4751 if ((specbits & (1 << (int) RID_SIGNED))
4752 || (typedef_decl && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl)))
4753 C_TYPEDEF_EXPLICITLY_SIGNED (decl) = 1;
4757 /* Detect the case of an array type of unspecified size
4758 which came, as such, direct from a typedef name.
4759 We must copy the type, so that each identifier gets
4760 a distinct type, so that each identifier's size can be
4761 controlled separately by its own initializer. */
4763 if (type != 0 && typedef_type != 0
4764 && TREE_CODE (type) == ARRAY_TYPE && TYPE_DOMAIN (type) == 0
4765 && TYPE_MAIN_VARIANT (type) == TYPE_MAIN_VARIANT (typedef_type))
4767 type = build_array_type (TREE_TYPE (type), 0);
4769 C_TYPE_VARIABLE_SIZE (type) = 1;
4772 /* If this is a type name (such as, in a cast or sizeof),
4773 compute the type and return it now. */
4775 if (decl_context == TYPENAME)
4777 /* Note that the grammar rejects storage classes
4778 in typenames, fields or parameters */
4779 if (pedantic && TREE_CODE (type) == FUNCTION_TYPE
4781 pedwarn ("ISO C forbids const or volatile function types");
4783 type = c_build_qualified_type (type, type_quals);
4787 /* Aside from typedefs and type names (handle above),
4788 `void' at top level (not within pointer)
4789 is allowed only in public variables.
4790 We don't complain about parms either, but that is because
4791 a better error message can be made later. */
4793 if (VOID_TYPE_P (type) && decl_context != PARM
4794 && ! ((decl_context != FIELD && TREE_CODE (type) != FUNCTION_TYPE)
4795 && ((specbits & (1 << (int) RID_EXTERN))
4796 || (current_binding_level == global_binding_level
4798 & ((1 << (int) RID_STATIC) | (1 << (int) RID_REGISTER)))))))
4800 error ("variable or field `%s' declared void", name);
4801 type = integer_type_node;
4804 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
4805 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
4810 if (decl_context == PARM)
4812 tree type_as_written = type;
4815 /* A parameter declared as an array of T is really a pointer to T.
4816 One declared as a function is really a pointer to a function. */
4818 if (TREE_CODE (type) == ARRAY_TYPE)
4820 /* Transfer const-ness of array into that of type pointed to. */
4821 type = TREE_TYPE (type);
4823 type = c_build_qualified_type (type, type_quals);
4824 type = build_pointer_type (type);
4825 type_quals = TYPE_UNQUALIFIED;
4828 else if (TREE_CODE (type) == FUNCTION_TYPE)
4830 if (pedantic && type_quals)
4831 pedwarn ("ISO C forbids qualified function types");
4833 type = c_build_qualified_type (type, type_quals);
4834 type = build_pointer_type (type);
4835 type_quals = TYPE_UNQUALIFIED;
4838 decl = build_decl (PARM_DECL, declarator, type);
4840 C_DECL_VARIABLE_SIZE (decl) = 1;
4842 /* Compute the type actually passed in the parmlist,
4843 for the case where there is no prototype.
4844 (For example, shorts and chars are passed as ints.)
4845 When there is a prototype, this is overridden later. */
4847 if (type == error_mark_node)
4848 promoted_type = type;
4851 promoted_type = simple_type_promotes_to (type);
4852 if (! promoted_type)
4853 promoted_type = type;
4856 DECL_ARG_TYPE (decl) = promoted_type;
4857 DECL_ARG_TYPE_AS_WRITTEN (decl) = type_as_written;
4859 else if (decl_context == FIELD)
4861 /* Structure field. It may not be a function. */
4863 if (TREE_CODE (type) == FUNCTION_TYPE)
4865 error ("field `%s' declared as a function", name);
4866 type = build_pointer_type (type);
4868 else if (TREE_CODE (type) != ERROR_MARK
4869 && !COMPLETE_OR_UNBOUND_ARRAY_TYPE_P (type))
4871 error ("field `%s' has incomplete type", name);
4872 type = error_mark_node;
4874 /* Move type qualifiers down to element of an array. */
4875 if (TREE_CODE (type) == ARRAY_TYPE && type_quals)
4877 type = build_array_type (c_build_qualified_type (TREE_TYPE (type),
4879 TYPE_DOMAIN (type));
4881 /* Leave the field const or volatile as well. */
4882 type_quals = TYPE_UNQUALIFIED;
4885 decl = build_decl (FIELD_DECL, declarator, type);
4886 DECL_NONADDRESSABLE_P (decl) = bitfield;
4889 C_DECL_VARIABLE_SIZE (decl) = 1;
4891 else if (TREE_CODE (type) == FUNCTION_TYPE)
4893 /* Every function declaration is "external"
4894 except for those which are inside a function body
4895 in which `auto' is used.
4896 That is a case not specified by ANSI C,
4897 and we use it for forward declarations for nested functions. */
4898 int extern_ref = (!(specbits & (1 << (int) RID_AUTO))
4899 || current_binding_level == global_binding_level);
4901 if (specbits & (1 << (int) RID_AUTO)
4902 && (pedantic || current_binding_level == global_binding_level))
4903 pedwarn ("invalid storage class for function `%s'", name);
4904 if (specbits & (1 << (int) RID_REGISTER))
4905 error ("invalid storage class for function `%s'", name);
4906 /* Function declaration not at top level.
4907 Storage classes other than `extern' are not allowed
4908 and `extern' makes no difference. */
4909 if (current_binding_level != global_binding_level
4910 && (specbits & ((1 << (int) RID_STATIC) | (1 << (int) RID_INLINE)))
4912 pedwarn ("invalid storage class for function `%s'", name);
4914 decl = build_decl (FUNCTION_DECL, declarator, type);
4915 decl = build_decl_attribute_variant (decl, decl_machine_attr);
4917 if (pedantic && type_quals && ! DECL_IN_SYSTEM_HEADER (decl))
4918 pedwarn ("ISO C forbids qualified function types");
4920 /* GNU C interprets a `volatile void' return type to indicate
4921 that the function does not return. */
4922 if ((type_quals & TYPE_QUAL_VOLATILE)
4923 && !VOID_TYPE_P (TREE_TYPE (TREE_TYPE (decl))))
4924 warning ("`noreturn' function returns non-void value");
4927 DECL_EXTERNAL (decl) = 1;
4928 /* Record absence of global scope for `static' or `auto'. */
4930 = !(specbits & ((1 << (int) RID_STATIC) | (1 << (int) RID_AUTO)));
4932 /* Record presence of `inline', if it is reasonable. */
4935 if (MAIN_NAME_P (declarator))
4936 warning ("cannot inline function `main'");
4938 /* Assume that otherwise the function can be inlined. */
4939 DECL_INLINE (decl) = 1;
4941 if (specbits & (1 << (int) RID_EXTERN))
4942 current_extern_inline = 1;
4947 /* It's a variable. */
4948 /* An uninitialized decl with `extern' is a reference. */
4949 int extern_ref = !initialized && (specbits & (1 << (int) RID_EXTERN));
4951 /* Move type qualifiers down to element of an array. */
4952 if (TREE_CODE (type) == ARRAY_TYPE && type_quals)
4954 type = build_array_type (c_build_qualified_type (TREE_TYPE (type),
4956 TYPE_DOMAIN (type));
4957 #if 0 /* Leave the variable const or volatile as well. */
4958 type_quals = TYPE_UNQUALIFIED;
4962 decl = build_decl (VAR_DECL, declarator, type);
4964 C_DECL_VARIABLE_SIZE (decl) = 1;
4967 pedwarn_with_decl (decl, "variable `%s' declared `inline'");
4969 DECL_EXTERNAL (decl) = extern_ref;
4970 /* At top level, the presence of a `static' or `register' storage
4971 class specifier, or the absence of all storage class specifiers
4972 makes this declaration a definition (perhaps tentative). Also,
4973 the absence of both `static' and `register' makes it public. */
4974 if (current_binding_level == global_binding_level)
4978 & ((1 << (int) RID_STATIC) | (1 << (int) RID_REGISTER)));
4979 TREE_STATIC (decl) = ! DECL_EXTERNAL (decl);
4981 /* Not at top level, only `static' makes a static definition. */
4984 TREE_STATIC (decl) = (specbits & (1 << (int) RID_STATIC)) != 0;
4985 TREE_PUBLIC (decl) = DECL_EXTERNAL (decl);
4989 /* Record `register' declaration for warnings on &
4990 and in case doing stupid register allocation. */
4992 if (specbits & (1 << (int) RID_REGISTER))
4993 DECL_REGISTER (decl) = 1;
4995 /* Record constancy and volatility. */
4996 c_apply_type_quals_to_decl (type_quals, decl);
4998 /* If a type has volatile components, it should be stored in memory.
4999 Otherwise, the fact that those components are volatile
5000 will be ignored, and would even crash the compiler. */
5001 if (C_TYPE_FIELDS_VOLATILE (TREE_TYPE (decl)))
5002 mark_addressable (decl);
5008 /* Decode the parameter-list info for a function type or function definition.
5009 The argument is the value returned by `get_parm_info' (or made in parse.y
5010 if there is an identifier list instead of a parameter decl list).
5011 These two functions are separate because when a function returns
5012 or receives functions then each is called multiple times but the order
5013 of calls is different. The last call to `grokparms' is always the one
5014 that contains the formal parameter names of a function definition.
5016 Store in `last_function_parms' a chain of the decls of parms.
5017 Also store in `last_function_parm_tags' a chain of the struct, union,
5018 and enum tags declared among the parms.
5020 Return a list of arg types to use in the FUNCTION_TYPE for this function.
5022 FUNCDEF_FLAG is nonzero for a function definition, 0 for
5023 a mere declaration. A nonempty identifier-list gets an error message
5024 when FUNCDEF_FLAG is zero. */
5027 grokparms (parms_info, funcdef_flag)
5031 tree first_parm = TREE_CHAIN (parms_info);
5033 last_function_parms = TREE_PURPOSE (parms_info);
5034 last_function_parm_tags = TREE_VALUE (parms_info);
5036 if (warn_strict_prototypes && first_parm == 0 && !funcdef_flag
5037 && !in_system_header)
5038 warning ("function declaration isn't a prototype");
5041 && TREE_CODE (TREE_VALUE (first_parm)) == IDENTIFIER_NODE)
5044 pedwarn ("parameter names (without types) in function declaration");
5046 last_function_parms = first_parm;
5053 /* We no longer test FUNCDEF_FLAG.
5054 If the arg types are incomplete in a declaration,
5055 they must include undefined tags.
5056 These tags can never be defined in the scope of the declaration,
5057 so the types can never be completed,
5058 and no call can be compiled successfully. */
5060 /* In a fcn definition, arg types must be complete. */
5063 for (parm = last_function_parms, typelt = first_parm;
5065 parm = TREE_CHAIN (parm))
5066 /* Skip over any enumeration constants declared here. */
5067 if (TREE_CODE (parm) == PARM_DECL)
5069 /* Barf if the parameter itself has an incomplete type. */
5070 tree type = TREE_VALUE (typelt);
5071 if (!COMPLETE_TYPE_P (type))
5073 if (funcdef_flag && DECL_NAME (parm) != 0)
5074 error ("parameter `%s' has incomplete type",
5075 IDENTIFIER_POINTER (DECL_NAME (parm)));
5077 warning ("parameter has incomplete type");
5080 TREE_VALUE (typelt) = error_mark_node;
5081 TREE_TYPE (parm) = error_mark_node;
5085 /* This has been replaced by parm_tags_warning, which
5086 uses a more accurate criterion for what to warn
5090 /* Now warn if is a pointer to an incomplete type. */
5091 while (TREE_CODE (type) == POINTER_TYPE
5092 || TREE_CODE (type) == REFERENCE_TYPE)
5093 type = TREE_TYPE (type);
5094 type = TYPE_MAIN_VARIANT (type);
5095 if (!COMPLETE_TYPE_P (type))
5097 if (DECL_NAME (parm) != 0)
5098 warning ("parameter `%s' points to incomplete type",
5099 IDENTIFIER_POINTER (DECL_NAME (parm)));
5101 warning ("parameter points to incomplete type");
5105 typelt = TREE_CHAIN (typelt);
5112 /* Return a tree_list node with info on a parameter list just parsed.
5113 The TREE_PURPOSE is a chain of decls of those parms.
5114 The TREE_VALUE is a list of structure, union and enum tags defined.
5115 The TREE_CHAIN is a list of argument types to go in the FUNCTION_TYPE.
5116 This tree_list node is later fed to `grokparms'.
5118 VOID_AT_END nonzero means append `void' to the end of the type-list.
5119 Zero means the parmlist ended with an ellipsis so don't append `void'. */
5122 get_parm_info (void_at_end)
5125 register tree decl, t;
5126 register tree types = 0;
5128 tree tags = gettags ();
5129 tree parms = getdecls ();
5131 tree order = current_binding_level->parm_order;
5133 /* Just `void' (and no ellipsis) is special. There are really no parms.
5134 But if the `void' is qualified (by `const' or `volatile') or has a
5135 storage class specifier (`register'), then the behavior is undefined;
5136 by not counting it as the special case of `void' we will cause an
5137 error later. Typedefs for `void' are OK (see DR#157). */
5138 if (void_at_end && parms != 0
5139 && TREE_CHAIN (parms) == 0
5140 && VOID_TYPE_P (TREE_TYPE (parms))
5141 && ! TREE_THIS_VOLATILE (parms)
5142 && ! TREE_READONLY (parms)
5143 && ! DECL_REGISTER (parms)
5144 && DECL_NAME (parms) == 0)
5147 storedecls (NULL_TREE);
5148 return tree_cons (NULL_TREE, NULL_TREE,
5149 tree_cons (NULL_TREE, void_type_node, NULL_TREE));
5152 /* Extract enumerator values and other non-parms declared with the parms.
5153 Likewise any forward parm decls that didn't have real parm decls. */
5154 for (decl = parms; decl;)
5156 tree next = TREE_CHAIN (decl);
5158 if (TREE_CODE (decl) != PARM_DECL)
5160 TREE_CHAIN (decl) = new_parms;
5163 else if (TREE_ASM_WRITTEN (decl))
5165 error_with_decl (decl,
5166 "parameter `%s' has just a forward declaration");
5167 TREE_CHAIN (decl) = new_parms;
5173 /* Put the parm decls back in the order they were in in the parm list. */
5174 for (t = order; t; t = TREE_CHAIN (t))
5177 TREE_CHAIN (TREE_VALUE (t)) = TREE_VALUE (TREE_CHAIN (t));
5179 TREE_CHAIN (TREE_VALUE (t)) = 0;
5182 new_parms = chainon (order ? nreverse (TREE_VALUE (order)) : 0,
5185 /* Store the parmlist in the binding level since the old one
5186 is no longer a valid list. (We have changed the chain pointers.) */
5187 storedecls (new_parms);
5189 for (decl = new_parms; decl; decl = TREE_CHAIN (decl))
5190 /* There may also be declarations for enumerators if an enumeration
5191 type is declared among the parms. Ignore them here. */
5192 if (TREE_CODE (decl) == PARM_DECL)
5194 /* Since there is a prototype,
5195 args are passed in their declared types. */
5196 tree type = TREE_TYPE (decl);
5197 DECL_ARG_TYPE (decl) = type;
5198 if (PROMOTE_PROTOTYPES
5199 && (TREE_CODE (type) == INTEGER_TYPE
5200 || TREE_CODE (type) == ENUMERAL_TYPE)
5201 && TYPE_PRECISION (type) < TYPE_PRECISION (integer_type_node))
5202 DECL_ARG_TYPE (decl) = integer_type_node;
5204 types = tree_cons (NULL_TREE, TREE_TYPE (decl), types);
5205 if (VOID_TYPE_P (TREE_VALUE (types)) && ! erred
5206 && DECL_NAME (decl) == 0)
5208 error ("`void' in parameter list must be the entire list");
5214 return tree_cons (new_parms, tags,
5215 nreverse (tree_cons (NULL_TREE, void_type_node, types)));
5217 return tree_cons (new_parms, tags, nreverse (types));
5220 /* At end of parameter list, warn about any struct, union or enum tags
5221 defined within. Do so because these types cannot ever become complete. */
5224 parmlist_tags_warning ()
5229 for (elt = current_binding_level->tags; elt; elt = TREE_CHAIN (elt))
5231 enum tree_code code = TREE_CODE (TREE_VALUE (elt));
5232 /* An anonymous union parm type is meaningful as a GNU extension.
5233 So don't warn for that. */
5234 if (code == UNION_TYPE && TREE_PURPOSE (elt) == 0 && !pedantic)
5236 if (TREE_PURPOSE (elt) != 0)
5237 warning ("`%s %s' declared inside parameter list",
5238 (code == RECORD_TYPE ? "struct"
5239 : code == UNION_TYPE ? "union"
5241 IDENTIFIER_POINTER (TREE_PURPOSE (elt)));
5244 /* For translation these need to be seperate warnings */
5245 if (code == RECORD_TYPE)
5246 warning ("anonymous struct declared inside parameter list");
5247 else if (code == UNION_TYPE)
5248 warning ("anonymous union declared inside parameter list");
5250 warning ("anonymous enum declared inside parameter list");
5254 warning ("its scope is only this definition or declaration, which is probably not what you want.");
5260 /* Get the struct, enum or union (CODE says which) with tag NAME.
5261 Define the tag as a forward-reference if it is not defined. */
5264 xref_tag (code, name)
5265 enum tree_code code;
5268 /* If a cross reference is requested, look up the type
5269 already defined for this tag and return it. */
5271 register tree ref = lookup_tag (code, name, current_binding_level, 0);
5272 /* Even if this is the wrong type of tag, return what we found.
5273 There will be an error message anyway, from pending_xref_error.
5274 If we create an empty xref just for an invalid use of the type,
5275 the main result is to create lots of superfluous error messages. */
5279 /* If no such tag is yet defined, create a forward-reference node
5280 and record it as the "definition".
5281 When a real declaration of this type is found,
5282 the forward-reference will be altered into a real type. */
5284 ref = make_node (code);
5285 if (code == ENUMERAL_TYPE)
5287 /* (In ANSI, Enums can be referred to only if already defined.) */
5289 pedwarn ("ISO C forbids forward references to `enum' types");
5290 /* Give the type a default layout like unsigned int
5291 to avoid crashing if it does not get defined. */
5292 TYPE_MODE (ref) = TYPE_MODE (unsigned_type_node);
5293 TYPE_ALIGN (ref) = TYPE_ALIGN (unsigned_type_node);
5294 TYPE_USER_ALIGN (ref) = 0;
5295 TREE_UNSIGNED (ref) = 1;
5296 TYPE_PRECISION (ref) = TYPE_PRECISION (unsigned_type_node);
5297 TYPE_MIN_VALUE (ref) = TYPE_MIN_VALUE (unsigned_type_node);
5298 TYPE_MAX_VALUE (ref) = TYPE_MAX_VALUE (unsigned_type_node);
5301 pushtag (name, ref);
5306 /* Make sure that the tag NAME is defined *in the current binding level*
5307 at least as a forward reference.
5308 CODE says which kind of tag NAME ought to be. */
5311 start_struct (code, name)
5312 enum tree_code code;
5315 /* If there is already a tag defined at this binding level
5316 (as a forward reference), just return it. */
5318 register tree ref = 0;
5321 ref = lookup_tag (code, name, current_binding_level, 1);
5322 if (ref && TREE_CODE (ref) == code)
5324 C_TYPE_BEING_DEFINED (ref) = 1;
5325 TYPE_PACKED (ref) = flag_pack_struct;
5326 if (TYPE_FIELDS (ref))
5327 error ("redefinition of `%s %s'",
5328 code == UNION_TYPE ? "union" : "struct",
5329 IDENTIFIER_POINTER (name));
5334 /* Otherwise create a forward-reference just so the tag is in scope. */
5336 ref = make_node (code);
5337 pushtag (name, ref);
5338 C_TYPE_BEING_DEFINED (ref) = 1;
5339 TYPE_PACKED (ref) = flag_pack_struct;
5343 /* Process the specs, declarator (NULL if omitted) and width (NULL if omitted)
5344 of a structure component, returning a FIELD_DECL node.
5345 WIDTH is non-NULL for bit fields only, and is an INTEGER_CST node.
5347 This is done during the parsing of the struct declaration.
5348 The FIELD_DECL nodes are chained together and the lot of them
5349 are ultimately passed to `build_struct' to make the RECORD_TYPE node. */
5352 grokfield (filename, line, declarator, declspecs, width)
5353 const char *filename ATTRIBUTE_UNUSED;
5354 int line ATTRIBUTE_UNUSED;
5355 tree declarator, declspecs, width;
5359 value = grokdeclarator (declarator, declspecs, width ? BITFIELD : FIELD, 0);
5361 finish_decl (value, NULL_TREE, NULL_TREE);
5362 DECL_INITIAL (value) = width;
5364 maybe_objc_check_decl (value);
5368 /* Fill in the fields of a RECORD_TYPE or UNION_TYPE node, T.
5369 FIELDLIST is a chain of FIELD_DECL nodes for the fields.
5370 ATTRIBUTES are attributes to be applied to the structure. */
5373 finish_struct (t, fieldlist, attributes)
5379 int toplevel = global_binding_level == current_binding_level;
5381 /* If this type was previously laid out as a forward reference,
5382 make sure we lay it out again. */
5386 decl_attributes (t, attributes, NULL_TREE);
5388 /* Nameless union parm types are useful as GCC extension. */
5389 if (! (TREE_CODE (t) == UNION_TYPE && TYPE_NAME (t) == 0) && !pedantic)
5390 /* Otherwise, warn about any struct or union def. in parmlist. */
5391 if (in_parm_level_p ())
5394 pedwarn ("%s defined inside parms",
5395 TREE_CODE (t) == UNION_TYPE ? _("union") : _("structure"));
5396 else if (! flag_traditional)
5397 warning ("%s defined inside parms",
5398 TREE_CODE (t) == UNION_TYPE ? _("union") : _("structure"));
5403 for (x = fieldlist; x; x = TREE_CHAIN (x))
5404 if (DECL_NAME (x) != 0)
5408 pedwarn ("%s has no %s",
5409 TREE_CODE (t) == UNION_TYPE ? _("union") : _("struct"),
5410 fieldlist ? _("named members") : _("members"));
5413 /* Install struct as DECL_CONTEXT of each field decl.
5414 Also process specified field sizes,m which is found in the DECL_INITIAL.
5415 Store 0 there, except for ": 0" fields (so we can find them
5416 and delete them, below). */
5418 for (x = fieldlist; x; x = TREE_CHAIN (x))
5420 DECL_CONTEXT (x) = t;
5421 DECL_PACKED (x) |= TYPE_PACKED (t);
5423 /* If any field is const, the structure type is pseudo-const. */
5424 if (TREE_READONLY (x))
5425 C_TYPE_FIELDS_READONLY (t) = 1;
5428 /* A field that is pseudo-const makes the structure likewise. */
5429 tree t1 = TREE_TYPE (x);
5430 while (TREE_CODE (t1) == ARRAY_TYPE)
5431 t1 = TREE_TYPE (t1);
5432 if ((TREE_CODE (t1) == RECORD_TYPE || TREE_CODE (t1) == UNION_TYPE)
5433 && C_TYPE_FIELDS_READONLY (t1))
5434 C_TYPE_FIELDS_READONLY (t) = 1;
5437 /* Any field that is volatile means variables of this type must be
5438 treated in some ways as volatile. */
5439 if (TREE_THIS_VOLATILE (x))
5440 C_TYPE_FIELDS_VOLATILE (t) = 1;
5442 /* Any field of nominal variable size implies structure is too. */
5443 if (C_DECL_VARIABLE_SIZE (x))
5444 C_TYPE_VARIABLE_SIZE (t) = 1;
5446 /* Detect invalid nested redefinition. */
5447 if (TREE_TYPE (x) == t)
5448 error ("nested redefinition of `%s'",
5449 IDENTIFIER_POINTER (TYPE_NAME (t)));
5451 /* Detect invalid bit-field size. */
5452 if (DECL_INITIAL (x))
5453 STRIP_NOPS (DECL_INITIAL (x));
5454 if (DECL_INITIAL (x))
5456 if (TREE_CODE (DECL_INITIAL (x)) == INTEGER_CST)
5457 constant_expression_warning (DECL_INITIAL (x));
5461 "bit-field `%s' width not an integer constant");
5462 DECL_INITIAL (x) = NULL;
5466 /* Detect invalid bit-field type. */
5467 if (DECL_INITIAL (x)
5468 && TREE_CODE (TREE_TYPE (x)) != INTEGER_TYPE
5469 && TREE_CODE (TREE_TYPE (x)) != BOOLEAN_TYPE
5470 && TREE_CODE (TREE_TYPE (x)) != ENUMERAL_TYPE)
5472 error_with_decl (x, "bit-field `%s' has invalid type");
5473 DECL_INITIAL (x) = NULL;
5476 if (DECL_INITIAL (x) && pedantic
5477 && TYPE_MAIN_VARIANT (TREE_TYPE (x)) != integer_type_node
5478 && TYPE_MAIN_VARIANT (TREE_TYPE (x)) != unsigned_type_node
5479 && TYPE_MAIN_VARIANT (TREE_TYPE (x)) != c_bool_type_node
5480 /* Accept an enum that's equivalent to int or unsigned int. */
5481 && !(TREE_CODE (TREE_TYPE (x)) == ENUMERAL_TYPE
5482 && (TYPE_PRECISION (TREE_TYPE (x))
5483 == TYPE_PRECISION (integer_type_node))))
5484 pedwarn_with_decl (x, "bit-field `%s' type invalid in ISO C");
5486 /* Detect and ignore out of range field width and process valid
5488 if (DECL_INITIAL (x))
5491 if (TYPE_MAIN_VARIANT (TREE_TYPE (x)) == c_bool_type_node)
5492 max_width = CHAR_TYPE_SIZE;
5494 max_width = TYPE_PRECISION (TREE_TYPE (x));
5495 if (tree_int_cst_sgn (DECL_INITIAL (x)) < 0)
5496 error_with_decl (x, "negative width in bit-field `%s'");
5497 else if (0 < compare_tree_int (DECL_INITIAL (x), max_width))
5498 pedwarn_with_decl (x, "width of `%s' exceeds its type");
5499 else if (integer_zerop (DECL_INITIAL (x)) && DECL_NAME (x) != 0)
5500 error_with_decl (x, "zero width for bit-field `%s'");
5503 /* The test above has assured us that TREE_INT_CST_HIGH is 0. */
5504 unsigned HOST_WIDE_INT width
5505 = TREE_INT_CST_LOW (DECL_INITIAL (x));
5507 if (TREE_CODE (TREE_TYPE (x)) == ENUMERAL_TYPE
5508 && (width < min_precision (TYPE_MIN_VALUE (TREE_TYPE (x)),
5509 TREE_UNSIGNED (TREE_TYPE (x)))
5511 < min_precision (TYPE_MAX_VALUE (TREE_TYPE (x)),
5512 TREE_UNSIGNED (TREE_TYPE (x))))))
5513 warning_with_decl (x,
5514 "`%s' is narrower than values of its type");
5516 DECL_SIZE (x) = bitsize_int (width);
5517 DECL_BIT_FIELD (x) = 1;
5518 SET_DECL_C_BIT_FIELD (x);
5522 /* field size 0 => force desired amount of alignment. */
5523 #ifdef EMPTY_FIELD_BOUNDARY
5524 DECL_ALIGN (x) = MAX (DECL_ALIGN (x), EMPTY_FIELD_BOUNDARY);
5526 #ifdef PCC_BITFIELD_TYPE_MATTERS
5527 if (PCC_BITFIELD_TYPE_MATTERS)
5529 DECL_ALIGN (x) = MAX (DECL_ALIGN (x),
5530 TYPE_ALIGN (TREE_TYPE (x)));
5531 DECL_USER_ALIGN (x) |= TYPE_USER_ALIGN (TREE_TYPE (x));
5538 else if (TREE_TYPE (x) != error_mark_node)
5540 unsigned int min_align = (DECL_PACKED (x) ? BITS_PER_UNIT
5541 : TYPE_ALIGN (TREE_TYPE (x)));
5543 /* Non-bit-fields are aligned for their type, except packed
5544 fields which require only BITS_PER_UNIT alignment. */
5545 DECL_ALIGN (x) = MAX (DECL_ALIGN (x), min_align);
5546 if (! DECL_PACKED (x))
5547 DECL_USER_ALIGN (x) |= TYPE_USER_ALIGN (TREE_TYPE (x));
5550 DECL_INITIAL (x) = 0;
5553 /* Delete all duplicate fields from the fieldlist */
5554 for (x = fieldlist; x && TREE_CHAIN (x);)
5555 /* Anonymous fields aren't duplicates. */
5556 if (DECL_NAME (TREE_CHAIN (x)) == 0)
5560 register tree y = fieldlist;
5564 if (DECL_NAME (y) == DECL_NAME (TREE_CHAIN (x)))
5570 if (DECL_NAME (y) == DECL_NAME (TREE_CHAIN (x)))
5572 error_with_decl (TREE_CHAIN (x), "duplicate member `%s'");
5573 TREE_CHAIN (x) = TREE_CHAIN (TREE_CHAIN (x));
5579 /* Now we have the nearly final fieldlist. Record it,
5580 then lay out the structure or union (including the fields). */
5582 TYPE_FIELDS (t) = fieldlist;
5586 /* Delete all zero-width bit-fields from the fieldlist */
5588 tree *fieldlistp = &fieldlist;
5590 if (TREE_CODE (*fieldlistp) == FIELD_DECL && DECL_INITIAL (*fieldlistp))
5591 *fieldlistp = TREE_CHAIN (*fieldlistp);
5593 fieldlistp = &TREE_CHAIN (*fieldlistp);
5596 /* Now we have the truly final field list.
5597 Store it in this type and in the variants. */
5599 TYPE_FIELDS (t) = fieldlist;
5601 for (x = TYPE_MAIN_VARIANT (t); x; x = TYPE_NEXT_VARIANT (x))
5603 TYPE_FIELDS (x) = TYPE_FIELDS (t);
5604 TYPE_LANG_SPECIFIC (x) = TYPE_LANG_SPECIFIC (t);
5605 TYPE_ALIGN (x) = TYPE_ALIGN (t);
5606 TYPE_USER_ALIGN (x) = TYPE_USER_ALIGN (t);
5609 /* If this was supposed to be a transparent union, but we can't
5610 make it one, warn and turn off the flag. */
5611 if (TREE_CODE (t) == UNION_TYPE
5612 && TYPE_TRANSPARENT_UNION (t)
5613 && TYPE_MODE (t) != DECL_MODE (TYPE_FIELDS (t)))
5615 TYPE_TRANSPARENT_UNION (t) = 0;
5616 warning ("union cannot be made transparent");
5619 /* If this structure or union completes the type of any previous
5620 variable declaration, lay it out and output its rtl. */
5622 if (current_binding_level->n_incomplete != 0)
5625 for (decl = current_binding_level->names; decl; decl = TREE_CHAIN (decl))
5627 if (TYPE_MAIN_VARIANT (TREE_TYPE (decl)) == TYPE_MAIN_VARIANT (t)
5628 && TREE_CODE (decl) != TYPE_DECL)
5630 layout_decl (decl, 0);
5631 /* This is a no-op in c-lang.c or something real in objc-actions.c. */
5632 maybe_objc_check_decl (decl);
5633 rest_of_decl_compilation (decl, NULL_PTR, toplevel, 0);
5636 --current_binding_level->n_incomplete;
5638 else if (!COMPLETE_TYPE_P (TREE_TYPE (decl))
5639 && TREE_CODE (TREE_TYPE (decl)) == ARRAY_TYPE)
5641 tree element = TREE_TYPE (decl);
5642 while (TREE_CODE (element) == ARRAY_TYPE)
5643 element = TREE_TYPE (element);
5645 layout_array_type (TREE_TYPE (decl));
5650 /* Finish debugging output for this type. */
5651 rest_of_type_compilation (t, toplevel);
5656 /* Lay out the type T, and its element type, and so on. */
5659 layout_array_type (t)
5662 if (TREE_CODE (TREE_TYPE (t)) == ARRAY_TYPE)
5663 layout_array_type (TREE_TYPE (t));
5667 /* Begin compiling the definition of an enumeration type.
5668 NAME is its name (or null if anonymous).
5669 Returns the type object, as yet incomplete.
5670 Also records info about it so that build_enumerator
5671 may be used to declare the individual values as they are read. */
5677 register tree enumtype = 0;
5679 /* If this is the real definition for a previous forward reference,
5680 fill in the contents in the same object that used to be the
5681 forward reference. */
5684 enumtype = lookup_tag (ENUMERAL_TYPE, name, current_binding_level, 1);
5686 if (enumtype == 0 || TREE_CODE (enumtype) != ENUMERAL_TYPE)
5688 enumtype = make_node (ENUMERAL_TYPE);
5689 pushtag (name, enumtype);
5692 C_TYPE_BEING_DEFINED (enumtype) = 1;
5694 if (TYPE_VALUES (enumtype) != 0)
5696 /* This enum is a named one that has been declared already. */
5697 error ("redeclaration of `enum %s'", IDENTIFIER_POINTER (name));
5699 /* Completely replace its old definition.
5700 The old enumerators remain defined, however. */
5701 TYPE_VALUES (enumtype) = 0;
5704 enum_next_value = integer_zero_node;
5707 if (flag_short_enums)
5708 TYPE_PACKED (enumtype) = 1;
5713 /* After processing and defining all the values of an enumeration type,
5714 install their decls in the enumeration type and finish it off.
5715 ENUMTYPE is the type object, VALUES a list of decl-value pairs,
5716 and ATTRIBUTES are the specified attributes.
5717 Returns ENUMTYPE. */
5720 finish_enum (enumtype, values, attributes)
5725 register tree pair, tem;
5726 tree minnode = 0, maxnode = 0, enum_value_type;
5727 int precision, unsign;
5728 int toplevel = (global_binding_level == current_binding_level);
5730 if (in_parm_level_p ())
5731 warning ("enum defined inside parms");
5733 decl_attributes (enumtype, attributes, NULL_TREE);
5735 /* Calculate the maximum value of any enumerator in this type. */
5737 if (values == error_mark_node)
5738 minnode = maxnode = integer_zero_node;
5741 minnode = maxnode = TREE_VALUE (values);
5742 for (pair = TREE_CHAIN (values); pair; pair = TREE_CHAIN (pair))
5744 tree value = TREE_VALUE (pair);
5745 if (tree_int_cst_lt (maxnode, value))
5747 if (tree_int_cst_lt (value, minnode))
5752 /* Construct the final type of this enumeration. It is the same
5753 as one of the integral types - the narrowest one that fits, except
5754 that normally we only go as narrow as int - and signed iff any of
5755 the values are negative. */
5756 unsign = (tree_int_cst_sgn (minnode) >= 0);
5757 precision = MAX (min_precision (minnode, unsign),
5758 min_precision (maxnode, unsign));
5759 if (!TYPE_PACKED (enumtype))
5760 precision = MAX (precision, TYPE_PRECISION (integer_type_node));
5761 if (type_for_size (precision, unsign) == 0)
5763 warning ("enumeration values exceed range of largest integer");
5764 precision = TYPE_PRECISION (long_long_integer_type_node);
5767 if (precision == TYPE_PRECISION (integer_type_node))
5768 enum_value_type = type_for_size (precision, 0);
5770 enum_value_type = enumtype;
5772 TYPE_MIN_VALUE (enumtype) = minnode;
5773 TYPE_MAX_VALUE (enumtype) = maxnode;
5774 TYPE_PRECISION (enumtype) = precision;
5775 TREE_UNSIGNED (enumtype) = unsign;
5776 TYPE_SIZE (enumtype) = 0;
5777 layout_type (enumtype);
5779 if (values != error_mark_node)
5781 /* Change the type of the enumerators to be the enum type. We
5782 need to do this irrespective of the size of the enum, for
5783 proper type checking. Replace the DECL_INITIALs of the
5784 enumerators, and the value slots of the list, with copies
5785 that have the enum type; they cannot be modified in place
5786 because they may be shared (e.g. integer_zero_node) Finally,
5787 change the purpose slots to point to the names of the decls. */
5788 for (pair = values; pair; pair = TREE_CHAIN (pair))
5790 tree enu = TREE_PURPOSE (pair);
5792 TREE_TYPE (enu) = enumtype;
5793 DECL_SIZE (enu) = TYPE_SIZE (enumtype);
5794 DECL_SIZE_UNIT (enu) = TYPE_SIZE_UNIT (enumtype);
5795 DECL_ALIGN (enu) = TYPE_ALIGN (enumtype);
5796 DECL_USER_ALIGN (enu) = TYPE_USER_ALIGN (enumtype);
5797 DECL_MODE (enu) = TYPE_MODE (enumtype);
5799 /* The ISO C Standard mandates enumerators to have type int,
5800 even though the underlying type of an enum type is
5801 unspecified. Here we convert any enumerators that fit in
5802 an int to type int, to avoid promotions to unsigned types
5803 when comparing integers with enumerators that fit in the
5804 int range. When -pedantic is given, build_enumerator()
5805 would have already taken care of those that don't fit. */
5806 if (int_fits_type_p (DECL_INITIAL (enu), enum_value_type))
5807 DECL_INITIAL (enu) = convert (enum_value_type, DECL_INITIAL (enu));
5809 DECL_INITIAL (enu) = convert (enumtype, DECL_INITIAL (enu));
5811 TREE_PURPOSE (pair) = DECL_NAME (enu);
5812 TREE_VALUE (pair) = DECL_INITIAL (enu);
5815 TYPE_VALUES (enumtype) = values;
5818 /* Fix up all variant types of this enum type. */
5819 for (tem = TYPE_MAIN_VARIANT (enumtype); tem; tem = TYPE_NEXT_VARIANT (tem))
5821 if (tem == enumtype)
5823 TYPE_VALUES (tem) = TYPE_VALUES (enumtype);
5824 TYPE_MIN_VALUE (tem) = TYPE_MIN_VALUE (enumtype);
5825 TYPE_MAX_VALUE (tem) = TYPE_MAX_VALUE (enumtype);
5826 TYPE_SIZE (tem) = TYPE_SIZE (enumtype);
5827 TYPE_SIZE_UNIT (tem) = TYPE_SIZE_UNIT (enumtype);
5828 TYPE_MODE (tem) = TYPE_MODE (enumtype);
5829 TYPE_PRECISION (tem) = TYPE_PRECISION (enumtype);
5830 TYPE_ALIGN (tem) = TYPE_ALIGN (enumtype);
5831 TYPE_USER_ALIGN (tem) = TYPE_USER_ALIGN (enumtype);
5832 TREE_UNSIGNED (tem) = TREE_UNSIGNED (enumtype);
5835 /* Finish debugging output for this type. */
5836 rest_of_type_compilation (enumtype, toplevel);
5841 /* Build and install a CONST_DECL for one value of the
5842 current enumeration type (one that was begun with start_enum).
5843 Return a tree-list containing the CONST_DECL and its value.
5844 Assignment of sequential values by default is handled here. */
5847 build_enumerator (name, value)
5850 register tree decl, type;
5852 /* Validate and default VALUE. */
5854 /* Remove no-op casts from the value. */
5856 STRIP_TYPE_NOPS (value);
5860 if (TREE_CODE (value) == INTEGER_CST)
5862 value = default_conversion (value);
5863 constant_expression_warning (value);
5867 error ("enumerator value for `%s' not integer constant",
5868 IDENTIFIER_POINTER (name));
5873 /* Default based on previous value. */
5874 /* It should no longer be possible to have NON_LVALUE_EXPR
5878 value = enum_next_value;
5880 error ("overflow in enumeration values");
5883 if (pedantic && ! int_fits_type_p (value, integer_type_node))
5885 pedwarn ("ISO C restricts enumerator values to range of `int'");
5886 value = convert (integer_type_node, value);
5889 /* Set basis for default for next value. */
5890 enum_next_value = build_binary_op (PLUS_EXPR, value, integer_one_node, 0);
5891 enum_overflow = tree_int_cst_lt (enum_next_value, value);
5893 /* Now create a declaration for the enum value name. */
5895 type = TREE_TYPE (value);
5896 type = type_for_size (MAX (TYPE_PRECISION (type),
5897 TYPE_PRECISION (integer_type_node)),
5899 || TYPE_PRECISION (type) >= TYPE_PRECISION (integer_type_node))
5900 && TREE_UNSIGNED (type)));
5902 decl = build_decl (CONST_DECL, name, type);
5903 DECL_INITIAL (decl) = convert (type, value);
5906 return tree_cons (decl, value, NULL_TREE);
5910 /* Create the FUNCTION_DECL for a function definition.
5911 DECLSPECS, DECLARATOR, PREFIX_ATTRIBUTES and ATTRIBUTES are the parts of
5912 the declaration; they describe the function's name and the type it returns,
5913 but twisted together in a fashion that parallels the syntax of C.
5915 This function creates a binding context for the function body
5916 as well as setting up the FUNCTION_DECL in current_function_decl.
5918 Returns 1 on success. If the DECLARATOR is not suitable for a function
5919 (it defines a datum instead), we return 0, which tells
5920 yyparse to report a parse error. */
5923 start_function (declspecs, declarator, prefix_attributes, attributes)
5924 tree declarator, declspecs, prefix_attributes, attributes;
5926 tree decl1, old_decl;
5928 int old_immediate_size_expand = immediate_size_expand;
5930 current_function_returns_value = 0; /* Assume, until we see it does. */
5931 current_function_returns_null = 0;
5932 warn_about_return_type = 0;
5933 current_extern_inline = 0;
5934 c_function_varargs = 0;
5936 shadowed_labels = 0;
5938 /* Don't expand any sizes in the return type of the function. */
5939 immediate_size_expand = 0;
5941 decl1 = grokdeclarator (declarator, declspecs, FUNCDEF, 1);
5943 /* If the declarator is not suitable for a function definition,
5944 cause a syntax error. */
5947 immediate_size_expand = old_immediate_size_expand;
5951 decl_attributes (decl1, prefix_attributes, attributes);
5953 announce_function (decl1);
5955 if (!COMPLETE_OR_VOID_TYPE_P (TREE_TYPE (TREE_TYPE (decl1))))
5957 error ("return type is an incomplete type");
5958 /* Make it return void instead. */
5960 = build_function_type (void_type_node,
5961 TYPE_ARG_TYPES (TREE_TYPE (decl1)));
5964 if (warn_about_return_type)
5965 pedwarn_c99 ("return type defaults to `int'");
5967 /* Save the parm names or decls from this function's declarator
5968 where store_parm_decls will find them. */
5969 current_function_parms = last_function_parms;
5970 current_function_parm_tags = last_function_parm_tags;
5972 /* Make the init_value nonzero so pushdecl knows this is not tentative.
5973 error_mark_node is replaced below (in poplevel) with the BLOCK. */
5974 DECL_INITIAL (decl1) = error_mark_node;
5976 /* If this definition isn't a prototype and we had a prototype declaration
5977 before, copy the arg type info from that prototype.
5978 But not if what we had before was a builtin function. */
5979 old_decl = lookup_name_current_level (DECL_NAME (decl1));
5980 if (old_decl != 0 && TREE_CODE (TREE_TYPE (old_decl)) == FUNCTION_TYPE
5981 && !DECL_BUILT_IN (old_decl)
5982 && (TYPE_MAIN_VARIANT (TREE_TYPE (TREE_TYPE (decl1)))
5983 == TYPE_MAIN_VARIANT (TREE_TYPE (TREE_TYPE (old_decl))))
5984 && TYPE_ARG_TYPES (TREE_TYPE (decl1)) == 0)
5986 TREE_TYPE (decl1) = TREE_TYPE (old_decl);
5987 current_function_prototype_file = DECL_SOURCE_FILE (old_decl);
5988 current_function_prototype_line = DECL_SOURCE_LINE (old_decl);
5991 /* If there is no explicit declaration, look for any out-of-scope implicit
5994 old_decl = IDENTIFIER_IMPLICIT_DECL (DECL_NAME (decl1));
5996 /* Optionally warn of old-fashioned def with no previous prototype. */
5997 if (warn_strict_prototypes
5998 && TYPE_ARG_TYPES (TREE_TYPE (decl1)) == 0
5999 && !(old_decl != 0 && TYPE_ARG_TYPES (TREE_TYPE (old_decl)) != 0))
6000 warning ("function declaration isn't a prototype");
6001 /* Optionally warn of any global def with no previous prototype. */
6002 else if (warn_missing_prototypes
6003 && TREE_PUBLIC (decl1)
6004 && !(old_decl != 0 && TYPE_ARG_TYPES (TREE_TYPE (old_decl)) != 0)
6005 && ! MAIN_NAME_P (DECL_NAME (decl1)))
6006 warning_with_decl (decl1, "no previous prototype for `%s'");
6007 /* Optionally warn of any def with no previous prototype
6008 if the function has already been used. */
6009 else if (warn_missing_prototypes
6010 && old_decl != 0 && TREE_USED (old_decl)
6011 && TYPE_ARG_TYPES (TREE_TYPE (old_decl)) == 0)
6012 warning_with_decl (decl1,
6013 "`%s' was used with no prototype before its definition");
6014 /* Optionally warn of any global def with no previous declaration. */
6015 else if (warn_missing_declarations
6016 && TREE_PUBLIC (decl1)
6018 && ! MAIN_NAME_P (DECL_NAME (decl1)))
6019 warning_with_decl (decl1, "no previous declaration for `%s'");
6020 /* Optionally warn of any def with no previous declaration
6021 if the function has already been used. */
6022 else if (warn_missing_declarations
6023 && old_decl != 0 && TREE_USED (old_decl)
6024 && old_decl == IDENTIFIER_IMPLICIT_DECL (DECL_NAME (decl1)))
6025 warning_with_decl (decl1,
6026 "`%s' was used with no declaration before its definition");
6028 /* This is a definition, not a reference.
6029 So normally clear DECL_EXTERNAL.
6030 However, `extern inline' acts like a declaration
6031 except for defining how to inline. So set DECL_EXTERNAL in that case. */
6032 DECL_EXTERNAL (decl1) = current_extern_inline;
6034 #ifdef SET_DEFAULT_DECL_ATTRIBUTES
6035 SET_DEFAULT_DECL_ATTRIBUTES (decl1, attributes);
6038 /* This function exists in static storage.
6039 (This does not mean `static' in the C sense!) */
6040 TREE_STATIC (decl1) = 1;
6042 /* A nested function is not global. */
6043 if (current_function_decl != 0)
6044 TREE_PUBLIC (decl1) = 0;
6046 /* Warn for unlikely, improbable, or stupid declarations of `main'. */
6047 if (warn_main > 0 && MAIN_NAME_P (DECL_NAME (decl1)))
6052 if (TYPE_MAIN_VARIANT (TREE_TYPE (TREE_TYPE (decl1)))
6053 != integer_type_node)
6054 pedwarn_with_decl (decl1, "return type of `%s' is not `int'");
6056 for (args = TYPE_ARG_TYPES (TREE_TYPE (decl1)); args;
6057 args = TREE_CHAIN (args))
6059 tree type = args ? TREE_VALUE (args) : 0;
6061 if (type == void_type_node)
6068 if (TYPE_MAIN_VARIANT (type) != integer_type_node)
6069 pedwarn_with_decl (decl1,
6070 "first argument of `%s' should be `int'");
6074 if (TREE_CODE (type) != POINTER_TYPE
6075 || TREE_CODE (TREE_TYPE (type)) != POINTER_TYPE
6076 || (TYPE_MAIN_VARIANT (TREE_TYPE (TREE_TYPE (type)))
6078 pedwarn_with_decl (decl1,
6079 "second argument of `%s' should be `char **'");
6083 if (TREE_CODE (type) != POINTER_TYPE
6084 || TREE_CODE (TREE_TYPE (type)) != POINTER_TYPE
6085 || (TYPE_MAIN_VARIANT (TREE_TYPE (TREE_TYPE (type)))
6087 pedwarn_with_decl (decl1,
6088 "third argument of `%s' should probably be `char **'");
6093 /* It is intentional that this message does not mention the third
6094 argument, which is warned for only pedantically, because it's
6095 blessed by mention in an appendix of the standard. */
6096 if (argct > 0 && (argct < 2 || argct > 3))
6097 pedwarn_with_decl (decl1, "`%s' takes only zero or two arguments");
6099 if (argct == 3 && pedantic)
6100 pedwarn_with_decl (decl1, "third argument of `%s' is deprecated");
6102 if (! TREE_PUBLIC (decl1))
6103 pedwarn_with_decl (decl1, "`%s' is normally a non-static function");
6106 /* Record the decl so that the function name is defined.
6107 If we already have a decl for this name, and it is a FUNCTION_DECL,
6108 use the old decl. */
6110 current_function_decl = pushdecl (decl1);
6113 declare_parm_level (1);
6114 current_binding_level->subblocks_tag_transparent = 1;
6116 make_function_rtl (current_function_decl);
6118 restype = TREE_TYPE (TREE_TYPE (current_function_decl));
6119 /* Promote the value to int before returning it. */
6120 if (C_PROMOTING_INTEGER_TYPE_P (restype))
6122 /* It retains unsignedness if traditional
6123 or if not really getting wider. */
6124 if (TREE_UNSIGNED (restype)
6125 && (flag_traditional
6126 || (TYPE_PRECISION (restype)
6127 == TYPE_PRECISION (integer_type_node))))
6128 restype = unsigned_type_node;
6130 restype = integer_type_node;
6132 DECL_RESULT (current_function_decl)
6133 = build_decl (RESULT_DECL, NULL_TREE, restype);
6135 /* If this fcn was already referenced via a block-scope `extern' decl
6136 (or an implicit decl), propagate certain information about the usage. */
6137 if (TREE_ADDRESSABLE (DECL_ASSEMBLER_NAME (current_function_decl)))
6138 TREE_ADDRESSABLE (current_function_decl) = 1;
6140 immediate_size_expand = old_immediate_size_expand;
6145 /* Record that this function is going to be a varargs function.
6146 This is called before store_parm_decls, which is too early
6147 to call mark_varargs directly. */
6152 c_function_varargs = 1;
6155 /* Store the parameter declarations into the current function declaration.
6156 This is called after parsing the parameter declarations, before
6157 digesting the body of the function.
6159 For an old-style definition, modify the function's type
6160 to specify at least the number of arguments. */
6165 register tree fndecl = current_function_decl;
6168 /* This is either a chain of PARM_DECLs (if a prototype was used)
6169 or a list of IDENTIFIER_NODEs (for an old-fashioned C definition). */
6170 tree specparms = current_function_parms;
6172 /* This is a list of types declared among parms in a prototype. */
6173 tree parmtags = current_function_parm_tags;
6175 /* This is a chain of PARM_DECLs from old-style parm declarations. */
6176 register tree parmdecls = getdecls ();
6178 /* This is a chain of any other decls that came in among the parm
6179 declarations. If a parm is declared with enum {foo, bar} x;
6180 then CONST_DECLs for foo and bar are put here. */
6183 /* Nonzero if this definition is written with a prototype. */
6186 if (specparms != 0 && TREE_CODE (specparms) != TREE_LIST)
6188 /* This case is when the function was defined with an ANSI prototype.
6189 The parms already have decls, so we need not do anything here
6190 except record them as in effect
6191 and complain if any redundant old-style parm decls were written. */
6202 error_with_decl (fndecl,
6203 "parm types given both in parmlist and separately");
6204 /* Get rid of the erroneous decls; don't keep them on
6205 the list of parms, since they might not be PARM_DECLs. */
6206 for (decl = current_binding_level->names;
6207 decl; decl = TREE_CHAIN (decl))
6208 if (DECL_NAME (decl))
6209 IDENTIFIER_LOCAL_VALUE (DECL_NAME (decl)) = 0;
6210 for (link = current_binding_level->shadowed;
6211 link; link = TREE_CHAIN (link))
6212 IDENTIFIER_LOCAL_VALUE (TREE_PURPOSE (link)) = TREE_VALUE (link);
6213 current_binding_level->names = 0;
6214 current_binding_level->shadowed = 0;
6217 specparms = nreverse (specparms);
6218 for (parm = specparms; parm; parm = next)
6220 next = TREE_CHAIN (parm);
6221 if (TREE_CODE (parm) == PARM_DECL)
6223 if (DECL_NAME (parm) == 0)
6224 error_with_decl (parm, "parameter name omitted");
6225 else if (TREE_CODE (TREE_TYPE (parm)) != ERROR_MARK
6226 && VOID_TYPE_P (TREE_TYPE (parm)))
6228 error_with_decl (parm, "parameter `%s' declared void");
6229 /* Change the type to error_mark_node so this parameter
6230 will be ignored by assign_parms. */
6231 TREE_TYPE (parm) = error_mark_node;
6237 /* If we find an enum constant or a type tag,
6238 put it aside for the moment. */
6239 TREE_CHAIN (parm) = 0;
6240 others = chainon (others, parm);
6244 /* Get the decls in their original chain order
6245 and record in the function. */
6246 DECL_ARGUMENTS (fndecl) = getdecls ();
6249 /* If this function takes a variable number of arguments,
6250 add a phony parameter to the end of the parm list,
6251 to represent the position of the first unnamed argument. */
6252 if (TREE_VALUE (tree_last (TYPE_ARG_TYPES (TREE_TYPE (fndecl))))
6255 tree dummy = build_decl (PARM_DECL, NULL_TREE, void_type_node);
6256 /* Let's hope the address of the unnamed parm
6257 won't depend on its type. */
6258 TREE_TYPE (dummy) = integer_type_node;
6259 DECL_ARG_TYPE (dummy) = integer_type_node;
6260 DECL_ARGUMENTS (fndecl) = chainon (DECL_ARGUMENTS (fndecl), dummy);
6264 /* Now pushdecl the enum constants. */
6265 for (parm = others; parm; parm = next)
6267 next = TREE_CHAIN (parm);
6268 if (DECL_NAME (parm) == 0)
6270 else if (TYPE_MAIN_VARIANT (TREE_TYPE (parm)) == void_type_node)
6272 else if (TREE_CODE (parm) != PARM_DECL)
6276 storetags (chainon (parmtags, gettags ()));
6280 /* SPECPARMS is an identifier list--a chain of TREE_LIST nodes
6281 each with a parm name as the TREE_VALUE.
6283 PARMDECLS is a chain of declarations for parameters.
6284 Warning! It can also contain CONST_DECLs which are not parameters
6285 but are names of enumerators of any enum types
6286 declared among the parameters.
6288 First match each formal parameter name with its declaration.
6289 Associate decls with the names and store the decls
6290 into the TREE_PURPOSE slots. */
6292 /* We use DECL_WEAK as a flag to show which parameters have been
6293 seen already since it is not used on PARM_DECL or CONST_DECL. */
6294 for (parm = parmdecls; parm; parm = TREE_CHAIN (parm))
6295 DECL_WEAK (parm) = 0;
6297 for (parm = specparms; parm; parm = TREE_CHAIN (parm))
6299 register tree tail, found = NULL;
6301 if (TREE_VALUE (parm) == 0)
6303 error_with_decl (fndecl,
6304 "parameter name missing from parameter list");
6305 TREE_PURPOSE (parm) = 0;
6309 /* See if any of the parmdecls specifies this parm by name.
6310 Ignore any enumerator decls. */
6311 for (tail = parmdecls; tail; tail = TREE_CHAIN (tail))
6312 if (DECL_NAME (tail) == TREE_VALUE (parm)
6313 && TREE_CODE (tail) == PARM_DECL)
6319 /* If declaration already marked, we have a duplicate name.
6320 Complain, and don't use this decl twice. */
6321 if (found && DECL_WEAK (found))
6323 error_with_decl (found, "multiple parameters named `%s'");
6327 /* If the declaration says "void", complain and ignore it. */
6328 if (found && VOID_TYPE_P (TREE_TYPE (found)))
6330 error_with_decl (found, "parameter `%s' declared void");
6331 TREE_TYPE (found) = integer_type_node;
6332 DECL_ARG_TYPE (found) = integer_type_node;
6333 layout_decl (found, 0);
6336 /* Traditionally, a parm declared float is actually a double. */
6337 if (found && flag_traditional
6338 && TYPE_MAIN_VARIANT (TREE_TYPE (found)) == float_type_node)
6340 TREE_TYPE (found) = double_type_node;
6341 DECL_ARG_TYPE (found) = double_type_node;
6342 layout_decl (found, 0);
6345 /* If no declaration found, default to int. */
6348 found = build_decl (PARM_DECL, TREE_VALUE (parm),
6350 DECL_ARG_TYPE (found) = TREE_TYPE (found);
6351 DECL_SOURCE_LINE (found) = DECL_SOURCE_LINE (fndecl);
6352 DECL_SOURCE_FILE (found) = DECL_SOURCE_FILE (fndecl);
6354 pedwarn_with_decl (found, "type of `%s' defaults to `int'");
6355 else if (extra_warnings)
6356 warning_with_decl (found, "type of `%s' defaults to `int'");
6360 TREE_PURPOSE (parm) = found;
6362 /* Mark this decl as "already found". */
6363 DECL_WEAK (found) = 1;
6366 /* Put anything which is on the parmdecls chain and which is
6367 not a PARM_DECL onto the list NONPARMS. (The types of
6368 non-parm things which might appear on the list include
6369 enumerators and NULL-named TYPE_DECL nodes.) Complain about
6370 any actual PARM_DECLs not matched with any names. */
6373 for (parm = parmdecls; parm;)
6375 tree next = TREE_CHAIN (parm);
6376 TREE_CHAIN (parm) = 0;
6378 if (TREE_CODE (parm) != PARM_DECL)
6379 nonparms = chainon (nonparms, parm);
6382 /* Complain about args with incomplete types. */
6383 if (!COMPLETE_TYPE_P (TREE_TYPE (parm)))
6385 error_with_decl (parm, "parameter `%s' has incomplete type");
6386 TREE_TYPE (parm) = error_mark_node;
6389 if (! DECL_WEAK (parm))
6391 error_with_decl (parm,
6392 "declaration for parameter `%s' but no such parameter");
6393 /* Pretend the parameter was not missing.
6394 This gets us to a standard state and minimizes
6395 further error messages. */
6397 = chainon (specparms,
6398 tree_cons (parm, NULL_TREE, NULL_TREE));
6405 /* Chain the declarations together in the order of the list of
6406 names. Store that chain in the function decl, replacing the
6409 DECL_ARGUMENTS (fndecl) = 0;
6412 for (last = 0; parm; parm = TREE_CHAIN (parm))
6413 if (TREE_PURPOSE (parm))
6416 DECL_ARGUMENTS (fndecl) = TREE_PURPOSE (parm);
6418 TREE_CHAIN (last) = TREE_PURPOSE (parm);
6419 last = TREE_PURPOSE (parm);
6420 TREE_CHAIN (last) = 0;
6424 /* If there was a previous prototype,
6425 set the DECL_ARG_TYPE of each argument according to
6426 the type previously specified, and report any mismatches. */
6428 if (TYPE_ARG_TYPES (TREE_TYPE (fndecl)))
6431 for (parm = DECL_ARGUMENTS (fndecl),
6432 type = TYPE_ARG_TYPES (TREE_TYPE (fndecl));
6433 parm || (type && (TYPE_MAIN_VARIANT (TREE_VALUE (type))
6434 != void_type_node));
6435 parm = TREE_CHAIN (parm), type = TREE_CHAIN (type))
6437 if (parm == 0 || type == 0
6438 || TYPE_MAIN_VARIANT (TREE_VALUE (type)) == void_type_node)
6440 error ("number of arguments doesn't match prototype");
6441 error_with_file_and_line (current_function_prototype_file,
6442 current_function_prototype_line,
6443 "prototype declaration");
6446 /* Type for passing arg must be consistent
6447 with that declared for the arg. */
6448 if (! comptypes (DECL_ARG_TYPE (parm), TREE_VALUE (type)))
6450 if (TYPE_MAIN_VARIANT (TREE_TYPE (parm))
6451 == TYPE_MAIN_VARIANT (TREE_VALUE (type)))
6453 /* Adjust argument to match prototype. E.g. a previous
6454 `int foo(float);' prototype causes
6455 `int foo(x) float x; {...}' to be treated like
6456 `int foo(float x) {...}'. This is particularly
6457 useful for argument types like uid_t. */
6458 DECL_ARG_TYPE (parm) = TREE_TYPE (parm);
6460 if (PROMOTE_PROTOTYPES
6461 && (TREE_CODE (TREE_TYPE (parm)) == INTEGER_TYPE
6462 || TREE_CODE (TREE_TYPE (parm)) == ENUMERAL_TYPE)
6463 && TYPE_PRECISION (TREE_TYPE (parm))
6464 < TYPE_PRECISION (integer_type_node))
6465 DECL_ARG_TYPE (parm) = integer_type_node;
6469 pedwarn ("promoted argument `%s' doesn't match prototype",
6470 IDENTIFIER_POINTER (DECL_NAME (parm)));
6471 warning_with_file_and_line
6472 (current_function_prototype_file,
6473 current_function_prototype_line,
6474 "prototype declaration");
6477 /* If -traditional, allow `int' argument to match
6478 `unsigned' prototype. */
6479 else if (! (flag_traditional
6480 && TYPE_MAIN_VARIANT (TREE_TYPE (parm)) == integer_type_node
6481 && TYPE_MAIN_VARIANT (TREE_VALUE (type)) == unsigned_type_node))
6483 error ("argument `%s' doesn't match prototype",
6484 IDENTIFIER_POINTER (DECL_NAME (parm)));
6485 error_with_file_and_line (current_function_prototype_file,
6486 current_function_prototype_line,
6487 "prototype declaration");
6491 TYPE_ACTUAL_ARG_TYPES (TREE_TYPE (fndecl)) = 0;
6494 /* Otherwise, create a prototype that would match. */
6498 tree actual = 0, last = 0, type;
6500 for (parm = DECL_ARGUMENTS (fndecl); parm; parm = TREE_CHAIN (parm))
6502 type = tree_cons (NULL_TREE, DECL_ARG_TYPE (parm), NULL_TREE);
6504 TREE_CHAIN (last) = type;
6509 type = tree_cons (NULL_TREE, void_type_node, NULL_TREE);
6511 TREE_CHAIN (last) = type;
6515 /* We are going to assign a new value for the TYPE_ACTUAL_ARG_TYPES
6516 of the type of this function, but we need to avoid having this
6517 affect the types of other similarly-typed functions, so we must
6518 first force the generation of an identical (but separate) type
6519 node for the relevant function type. The new node we create
6520 will be a variant of the main variant of the original function
6523 TREE_TYPE (fndecl) = build_type_copy (TREE_TYPE (fndecl));
6525 TYPE_ACTUAL_ARG_TYPES (TREE_TYPE (fndecl)) = actual;
6528 /* Now store the final chain of decls for the arguments
6529 as the decl-chain of the current lexical scope.
6530 Put the enumerators in as well, at the front so that
6531 DECL_ARGUMENTS is not modified. */
6533 storedecls (chainon (nonparms, DECL_ARGUMENTS (fndecl)));
6536 /* Make sure the binding level for the top of the function body
6537 gets a BLOCK if there are any in the function.
6538 Otherwise, the dbx output is wrong. */
6540 keep_next_if_subblocks = 1;
6542 /* ??? This might be an improvement,
6543 but needs to be thought about some more. */
6545 keep_next_level_flag = 1;
6548 /* Write a record describing this function definition to the prototypes
6549 file (if requested). */
6551 gen_aux_info_record (fndecl, 1, 0, prototype);
6553 /* Initialize the RTL code for the function. */
6555 init_function_start (fndecl, input_filename, lineno);
6557 /* Begin the statement tree for this function. */
6558 DECL_LANG_SPECIFIC (current_function_decl)
6559 =((struct lang_decl *) ggc_alloc (sizeof (struct lang_decl)));
6560 begin_stmt_tree (&DECL_SAVED_TREE (current_function_decl));
6562 /* This function is being processed in whole-function mode. */
6563 cfun->x_whole_function_mode_p = 1;
6565 /* Even though we're inside a function body, we still don't want to
6566 call expand_expr to calculate the size of a variable-sized array.
6567 We haven't necessarily assigned RTL to all variables yet, so it's
6568 not safe to try to expand expressions involving them. */
6569 immediate_size_expand = 0;
6570 cfun->x_dont_save_pending_sizes_p = 1;
6573 /* SPECPARMS is an identifier list--a chain of TREE_LIST nodes
6574 each with a parm name as the TREE_VALUE. A null pointer as TREE_VALUE
6575 stands for an ellipsis in the identifier list.
6577 PARMLIST is the data returned by get_parm_info for the
6578 parmlist that follows the semicolon.
6580 We return a value of the same sort that get_parm_info returns,
6581 except that it describes the combination of identifiers and parmlist. */
6584 combine_parm_decls (specparms, parmlist, void_at_end)
6585 tree specparms, parmlist;
6588 register tree fndecl = current_function_decl;
6591 tree parmdecls = TREE_PURPOSE (parmlist);
6593 /* This is a chain of any other decls that came in among the parm
6594 declarations. They were separated already by get_parm_info,
6595 so we just need to keep them separate. */
6596 tree nonparms = TREE_VALUE (parmlist);
6600 for (parm = parmdecls; parm; parm = TREE_CHAIN (parm))
6601 DECL_WEAK (parm) = 0;
6603 for (parm = specparms; parm; parm = TREE_CHAIN (parm))
6605 register tree tail, found = NULL;
6607 /* See if any of the parmdecls specifies this parm by name. */
6608 for (tail = parmdecls; tail; tail = TREE_CHAIN (tail))
6609 if (DECL_NAME (tail) == TREE_VALUE (parm))
6615 /* If declaration already marked, we have a duplicate name.
6616 Complain, and don't use this decl twice. */
6617 if (found && DECL_WEAK (found))
6619 error_with_decl (found, "multiple parameters named `%s'");
6623 /* If the declaration says "void", complain and ignore it. */
6624 if (found && VOID_TYPE_P (TREE_TYPE (found)))
6626 error_with_decl (found, "parameter `%s' declared void");
6627 TREE_TYPE (found) = integer_type_node;
6628 DECL_ARG_TYPE (found) = integer_type_node;
6629 layout_decl (found, 0);
6632 /* Traditionally, a parm declared float is actually a double. */
6633 if (found && flag_traditional
6634 && TYPE_MAIN_VARIANT (TREE_TYPE (found)) == float_type_node)
6636 TREE_TYPE (found) = double_type_node;
6637 DECL_ARG_TYPE (found) = double_type_node;
6638 layout_decl (found, 0);
6641 /* If no declaration found, default to int. */
6644 found = build_decl (PARM_DECL, TREE_VALUE (parm),
6646 DECL_ARG_TYPE (found) = TREE_TYPE (found);
6647 DECL_SOURCE_LINE (found) = DECL_SOURCE_LINE (fndecl);
6648 DECL_SOURCE_FILE (found) = DECL_SOURCE_FILE (fndecl);
6649 error_with_decl (found, "type of parameter `%s' is not declared");
6653 TREE_PURPOSE (parm) = found;
6655 /* Mark this decl as "already found". */
6656 DECL_WEAK (found) = 1;
6659 /* Complain about any actual PARM_DECLs not matched with any names. */
6661 for (parm = parmdecls; parm;)
6663 tree next = TREE_CHAIN (parm);
6664 TREE_CHAIN (parm) = 0;
6666 /* Complain about args with incomplete types. */
6667 if (!COMPLETE_TYPE_P (TREE_TYPE (parm)))
6669 error_with_decl (parm, "parameter `%s' has incomplete type");
6670 TREE_TYPE (parm) = error_mark_node;
6673 if (! DECL_WEAK (parm))
6675 error_with_decl (parm,
6676 "declaration for parameter `%s' but no such parameter");
6677 /* Pretend the parameter was not missing.
6678 This gets us to a standard state and minimizes
6679 further error messages. */
6681 = chainon (specparms,
6682 tree_cons (parm, NULL_TREE, NULL_TREE));
6688 /* Chain the declarations together in the order of the list of names.
6689 At the same time, build up a list of their types, in reverse order. */
6695 for (last = 0; parm; parm = TREE_CHAIN (parm))
6696 if (TREE_PURPOSE (parm))
6699 parmdecls = TREE_PURPOSE (parm);
6701 TREE_CHAIN (last) = TREE_PURPOSE (parm);
6702 last = TREE_PURPOSE (parm);
6703 TREE_CHAIN (last) = 0;
6705 types = tree_cons (NULL_TREE, TREE_TYPE (parm), types);
6710 return tree_cons (parmdecls, nonparms,
6711 nreverse (tree_cons (NULL_TREE, void_type_node, types)));
6713 return tree_cons (parmdecls, nonparms, nreverse (types));
6716 /* Finish up a function declaration and compile that function
6717 all the way to assembler language output. The free the storage
6718 for the function definition.
6720 This is called after parsing the body of the function definition.
6722 NESTED is nonzero if the function being finished is nested in another. */
6725 finish_function (nested)
6728 register tree fndecl = current_function_decl;
6730 /* TREE_READONLY (fndecl) = 1;
6731 This caused &foo to be of type ptr-to-const-function
6732 which then got a warning when stored in a ptr-to-function variable. */
6735 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl)) = fndecl;
6737 /* Must mark the RESULT_DECL as being in this function. */
6739 DECL_CONTEXT (DECL_RESULT (fndecl)) = fndecl;
6741 /* Obey `register' declarations if `setjmp' is called in this fn. */
6742 if (flag_traditional && current_function_calls_setjmp)
6744 setjmp_protect (DECL_INITIAL (fndecl));
6745 setjmp_protect_args ();
6748 if (MAIN_NAME_P (DECL_NAME (fndecl)) && flag_hosted)
6750 if (TYPE_MAIN_VARIANT (TREE_TYPE (TREE_TYPE (fndecl)))
6751 != integer_type_node)
6753 /* If warn_main is 1 (-Wmain) or 2 (-Wall), we have already warned.
6754 If warn_main is -1 (-Wno-main) we don't want to be warned. */
6756 pedwarn_with_decl (fndecl, "return type of `%s' is not `int'");
6760 #ifdef DEFAULT_MAIN_RETURN
6761 /* Make it so that `main' always returns success by default. */
6762 DEFAULT_MAIN_RETURN;
6765 c_expand_return (integer_zero_node);
6770 /* Tie off the statement tree for this function. */
6771 finish_stmt_tree (&DECL_SAVED_TREE (fndecl));
6772 /* Clear out memory we no longer need. */
6773 free_after_parsing (cfun);
6774 /* Since we never call rest_of_compilation, we never clear
6775 CFUN. Do so explicitly. */
6776 free_after_compilation (cfun);
6781 /* Generate RTL for the body of this function. */
6782 c_expand_body (fndecl, nested);
6783 /* Let the error reporting routines know that we're outside a
6784 function. For a nested function, this value is used in
6785 pop_c_function_context and then reset via pop_function_context. */
6786 current_function_decl = NULL;
6787 c_function_name_declared_p = 0;
6791 /* Generate the RTL for the body of FNDECL. If NESTED_P is non-zero,
6792 then we are already in the process of generating RTL for another
6796 c_expand_body (fndecl, nested_p)
6800 /* There's no reason to do any of the work here if we're only doing
6801 semantic analysis; this code just generates RTL. */
6802 if (flag_syntax_only)
6805 /* Squirrel away our current state. */
6807 push_function_context ();
6809 /* Initialize the RTL code for the function. */
6810 current_function_decl = fndecl;
6811 init_function_start (fndecl, input_filename, DECL_SOURCE_LINE (fndecl));
6813 /* This function is being processed in whole-function mode. */
6814 cfun->x_whole_function_mode_p = 1;
6816 /* Even though we're inside a function body, we still don't want to
6817 call expand_expr to calculate the size of a variable-sized array.
6818 We haven't necessarily assigned RTL to all variables yet, so it's
6819 not safe to try to expand expressions involving them. */
6820 immediate_size_expand = 0;
6821 cfun->x_dont_save_pending_sizes_p = 1;
6823 /* If this is a varargs function, inform function.c. */
6824 if (c_function_varargs)
6827 /* Set up parameters and prepare for return, for the function. */
6828 expand_function_start (fndecl, 0);
6830 /* If this function is `main', emit a call to `__main'
6831 to run global initializers, etc. */
6832 if (DECL_NAME (fndecl)
6833 && MAIN_NAME_P (DECL_NAME (fndecl))
6834 && DECL_CONTEXT (fndecl) == NULL_TREE)
6835 expand_main_function ();
6837 /* Generate the RTL for this function. */
6838 expand_stmt (DECL_SAVED_TREE (fndecl));
6839 /* Allow the body of the function to be garbage collected. */
6840 DECL_SAVED_TREE (fndecl) = NULL_TREE;
6842 /* We hard-wired immediate_size_expand to zero in start_function.
6843 expand_function_end will decrement this variable. So, we set the
6844 variable to one here, so that after the decrement it will remain
6846 immediate_size_expand = 1;
6848 /* Allow language dialects to perform special processing. */
6849 if (lang_expand_function_end)
6850 (*lang_expand_function_end) ();
6852 /* Generate rtl for function exit. */
6853 expand_function_end (input_filename, lineno, 0);
6855 /* If this is a nested function, protect the local variables in the stack
6856 above us from being collected while we're compiling this function. */
6858 ggc_push_context ();
6860 /* Run the optimizers and output the assembler code for this function. */
6861 rest_of_compilation (fndecl);
6863 /* Undo the GC context switch. */
6867 /* With just -W, complain only if function returns both with
6868 and without a value. */
6870 && current_function_returns_value
6871 && current_function_returns_null)
6872 warning ("this function may return with or without a value");
6874 /* If requested, warn about function definitions where the function will
6875 return a value (usually of some struct or union type) which itself will
6876 take up a lot of stack space. */
6878 if (warn_larger_than && !DECL_EXTERNAL (fndecl) && TREE_TYPE (fndecl))
6880 tree ret_type = TREE_TYPE (TREE_TYPE (fndecl));
6882 if (ret_type && TREE_CODE (TYPE_SIZE_UNIT (ret_type)) == INTEGER_CST
6883 && 0 < compare_tree_int (TYPE_SIZE_UNIT (ret_type),
6886 unsigned int size_as_int
6887 = TREE_INT_CST_LOW (TYPE_SIZE_UNIT (ret_type));
6889 if (compare_tree_int (TYPE_SIZE_UNIT (ret_type), size_as_int) == 0)
6890 warning_with_decl (fndecl,
6891 "size of return value of `%s' is %u bytes",
6894 warning_with_decl (fndecl,
6895 "size of return value of `%s' is larger than %d bytes",
6900 if (DECL_SAVED_INSNS (fndecl) == 0 && ! nested_p)
6902 /* Stop pointing to the local nodes about to be freed.
6903 But DECL_INITIAL must remain nonzero so we know this
6904 was an actual function definition.
6905 For a nested function, this is done in pop_c_function_context.
6906 If rest_of_compilation set this to 0, leave it 0. */
6907 if (DECL_INITIAL (fndecl) != 0)
6908 DECL_INITIAL (fndecl) = error_mark_node;
6910 DECL_ARGUMENTS (fndecl) = 0;
6913 if (DECL_STATIC_CONSTRUCTOR (fndecl))
6915 #ifndef ASM_OUTPUT_CONSTRUCTOR
6916 if (! flag_gnu_linker)
6917 static_ctors = tree_cons (NULL_TREE, fndecl, static_ctors);
6920 assemble_constructor (IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (fndecl)));
6923 if (DECL_STATIC_DESTRUCTOR (fndecl))
6925 #ifndef ASM_OUTPUT_DESTRUCTOR
6926 if (! flag_gnu_linker)
6927 static_dtors = tree_cons (NULL_TREE, fndecl, static_dtors);
6930 assemble_destructor (IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (fndecl)));
6935 /* Return to the enclosing function. */
6936 pop_function_context ();
6937 /* If the nested function was inline, write it out if that is
6939 if (!TREE_ASM_WRITTEN (fndecl) && TREE_ADDRESSABLE (fndecl))
6941 push_function_context ();
6942 output_inline_function (fndecl);
6943 pop_function_context ();
6949 /* Check the declarations given in a for-loop for satisfying the C99
6952 check_for_loop_decls ()
6958 /* If we get here, declarations have been used in a for loop without
6959 the C99 for loop scope. This doesn't make much sense, so don't
6961 error ("`for' loop initial declaration used outside C99 mode");
6964 /* C99 subclause 6.8.5 paragraph 3:
6966 [#3] The declaration part of a for statement shall only
6967 declare identifiers for objects having storage class auto or
6970 It isn't clear whether, in this sentence, "identifiers" binds to
6971 "shall only declare" or to "objects" - that is, whether all identifiers
6972 declared must be identifiers for objects, or whether the restriction
6973 only applies to those that are. (A question on this in comp.std.c
6974 in November 2000 received no answer.) We implement the strictest
6975 interpretation, to avoid creating an extension which later causes
6978 for (t = gettags (); t; t = TREE_CHAIN (t))
6980 if (TREE_PURPOSE (t) != 0)
6981 error ("`%s %s' declared in `for' loop initial declaration",
6982 (TREE_CODE (TREE_VALUE (t)) == RECORD_TYPE ? "struct"
6983 : TREE_CODE (TREE_VALUE (t)) == UNION_TYPE ? "union"
6985 IDENTIFIER_POINTER (TREE_PURPOSE (t)));
6987 for (t = getdecls (); t; t = TREE_CHAIN (t))
6989 if (TREE_CODE (t) != VAR_DECL && DECL_NAME (t))
6990 error_with_decl (t, "declaration of non-variable `%s' in `for' loop initial declaration");
6991 else if (TREE_STATIC (t))
6992 error_with_decl (t, "declaration of static variable `%s' in `for' loop initial declaration");
6993 else if (DECL_EXTERNAL (t))
6994 error_with_decl (t, "declaration of `extern' variable `%s' in `for' loop initial declaration");
6998 /* Save and restore the variables in this file and elsewhere
6999 that keep track of the progress of compilation of the current function.
7000 Used for nested functions. */
7002 struct c_language_function
7004 struct language_function base;
7006 tree shadowed_labels;
7009 int warn_about_return_type;
7011 struct binding_level *binding_level;
7014 /* Save and reinitialize the variables
7015 used during compilation of a C function. */
7018 push_c_function_context (f)
7021 struct c_language_function *p;
7022 p = ((struct c_language_function *)
7023 xmalloc (sizeof (struct c_language_function)));
7024 f->language = (struct language_function *) p;
7026 p->base.x_stmt_tree = c_stmt_tree;
7027 p->base.x_scope_stmt_stack = c_scope_stmt_stack;
7028 p->base.x_function_name_declared_p = c_function_name_declared_p;
7029 p->named_labels = named_labels;
7030 p->shadowed_labels = shadowed_labels;
7031 p->returns_value = current_function_returns_value;
7032 p->returns_null = current_function_returns_null;
7033 p->warn_about_return_type = warn_about_return_type;
7034 p->extern_inline = current_extern_inline;
7035 p->binding_level = current_binding_level;
7038 /* Restore the variables used during compilation of a C function. */
7041 pop_c_function_context (f)
7044 struct c_language_function *p
7045 = (struct c_language_function *) f->language;
7048 /* Bring back all the labels that were shadowed. */
7049 for (link = shadowed_labels; link; link = TREE_CHAIN (link))
7050 if (DECL_NAME (TREE_VALUE (link)) != 0)
7051 IDENTIFIER_LABEL_VALUE (DECL_NAME (TREE_VALUE (link)))
7052 = TREE_VALUE (link);
7054 if (DECL_SAVED_INSNS (current_function_decl) == 0
7055 && DECL_SAVED_TREE (current_function_decl) == NULL_TREE)
7057 /* Stop pointing to the local nodes about to be freed. */
7058 /* But DECL_INITIAL must remain nonzero so we know this
7059 was an actual function definition. */
7060 DECL_INITIAL (current_function_decl) = error_mark_node;
7061 DECL_ARGUMENTS (current_function_decl) = 0;
7064 c_stmt_tree = p->base.x_stmt_tree;
7065 c_scope_stmt_stack = p->base.x_scope_stmt_stack;
7066 c_function_name_declared_p = p->base.x_function_name_declared_p;
7067 named_labels = p->named_labels;
7068 shadowed_labels = p->shadowed_labels;
7069 current_function_returns_value = p->returns_value;
7070 current_function_returns_null = p->returns_null;
7071 warn_about_return_type = p->warn_about_return_type;
7072 current_extern_inline = p->extern_inline;
7073 current_binding_level = p->binding_level;
7079 /* Mark the language specific parts of F for GC. */
7082 mark_c_function_context (f)
7085 struct c_language_function *p
7086 = (struct c_language_function *) f->language;
7091 mark_c_language_function (&p->base);
7092 ggc_mark_tree (p->shadowed_labels);
7093 ggc_mark_tree (p->named_labels);
7094 mark_binding_level (&p->binding_level);
7097 /* Copy the DECL_LANG_SEPECIFIC data associated with NODE. */
7100 copy_lang_decl (decl)
7103 struct lang_decl *ld;
7105 if (!DECL_LANG_SPECIFIC (decl))
7108 ld = (struct lang_decl *) ggc_alloc (sizeof (struct lang_decl));
7109 memcpy ((char *) ld, (char *) DECL_LANG_SPECIFIC (decl),
7110 sizeof (struct lang_decl));
7111 DECL_LANG_SPECIFIC (decl) = ld;
7114 /* Mark the language specific bits in T for GC. */
7120 if (TREE_CODE (t) == IDENTIFIER_NODE)
7122 struct lang_identifier *i = (struct lang_identifier *) t;
7123 ggc_mark_tree (i->global_value);
7124 ggc_mark_tree (i->local_value);
7125 ggc_mark_tree (i->label_value);
7126 ggc_mark_tree (i->implicit_decl);
7127 ggc_mark_tree (i->error_locus);
7128 ggc_mark_tree (i->limbo_value);
7130 else if (TYPE_P (t) && TYPE_LANG_SPECIFIC (t))
7131 ggc_mark (TYPE_LANG_SPECIFIC (t));
7132 else if (DECL_P (t) && DECL_LANG_SPECIFIC (t))
7134 ggc_mark (DECL_LANG_SPECIFIC (t));
7135 c_mark_lang_decl (&DECL_LANG_SPECIFIC (t)->base);
7139 /* The functions below are required for functionality of doing
7140 function at once processing in the C front end. Currently these
7141 functions are not called from anywhere in the C front end, but as
7142 these changes continue, that will change. */
7144 /* Returns non-zero if the current statement is a full expression,
7145 i.e. temporaries created during that statement should be destroyed
7146 at the end of the statement. */
7149 stmts_are_full_exprs_p ()
7154 /* Returns the stmt_tree (if any) to which statements are currently
7155 being added. If there is no active statement-tree, NULL is
7159 current_stmt_tree ()
7161 return &c_stmt_tree;
7164 /* Returns the stack of SCOPE_STMTs for the current function. */
7167 current_scope_stmt_stack ()
7169 return &c_scope_stmt_stack;
7172 /* Nonzero if TYPE is an anonymous union or struct type. Always 0 in
7176 anon_aggr_type_p (node)
7177 tree node ATTRIBUTE_UNUSED;
7182 /* Dummy function in place of callback used by C++. */
7185 extract_interface_info ()
7189 /* Return a new COMPOUND_STMT, after adding it to the current
7193 c_begin_compound_stmt ()
7197 /* Create the COMPOUND_STMT. */
7198 stmt = add_stmt (build_stmt (COMPOUND_STMT, NULL_TREE));
7199 /* If we haven't already declared __FUNCTION__ and its ilk then this
7200 is the opening curly brace of the function. Declare them now. */
7201 if (!c_function_name_declared_p)
7203 c_function_name_declared_p = 1;
7204 declare_function_name ();
7210 /* Expand T (a DECL_STMT) if it declares an entity not handled by the
7214 c_expand_decl_stmt (t)
7217 tree decl = DECL_STMT_DECL (t);
7219 /* Expand nested functions. */
7220 if (TREE_CODE (decl) == FUNCTION_DECL
7221 && DECL_CONTEXT (decl) == current_function_decl
7222 && DECL_SAVED_TREE (decl))
7223 c_expand_body (decl, /*nested_p=*/1);