1 /* Top level of GCC compilers (cc1, cc1plus, etc.)
2 Copyright (C) 1987, 1988, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
3 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
4 Free Software Foundation, Inc.
6 This file is part of GCC.
8 GCC is free software; you can redistribute it and/or modify it under
9 the terms of the GNU General Public License as published by the Free
10 Software Foundation; either version 3, or (at your option) any later
13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING3. If not see
20 <http://www.gnu.org/licenses/>. */
22 /* This is the top level of cc1/c++.
23 It parses command args, opens files, invokes the various passes
24 in the proper order, and counts the time used by each.
25 Error messages and low-level interface to malloc also handled here. */
28 #undef FLOAT /* This is for hpux. They should change hpux. */
29 #undef FFS /* Some systems define this in param.h. */
31 #include "coretypes.h"
35 #ifdef HAVE_SYS_RESOURCE_H
36 # include <sys/resource.h>
39 #ifdef HAVE_SYS_TIMES_H
40 # include <sys/times.h>
50 #include "insn-attr.h"
51 #include "insn-config.h"
52 #include "insn-flags.h"
53 #include "hard-reg-set.h"
60 #include "basic-block.h"
66 #include "diagnostic.h"
70 #include "dwarf2asm.h"
71 #include "integrate.h"
75 #include "langhooks.h"
76 #include "cfglayout.h"
78 #include "hosthooks.h"
82 #include "value-prof.h"
83 #include "alloc-pool.h"
84 #include "tree-mudflap.h"
85 #include "tree-pass.h"
87 #include "tree-ssa-alias.h"
90 #if defined (DWARF2_UNWIND_INFO) || defined (DWARF2_DEBUGGING_INFO)
91 #include "dwarf2out.h"
94 #if defined(DBX_DEBUGGING_INFO) || defined(XCOFF_DEBUGGING_INFO)
98 #ifdef SDB_DEBUGGING_INFO
102 #ifdef XCOFF_DEBUGGING_INFO
103 #include "xcoffout.h" /* Needed for external data
104 declarations for e.g. AIX 4.x. */
107 static void general_init (const char *);
108 static void do_compile (void);
109 static void process_options (void);
110 static void backend_init (void);
111 static int lang_dependent_init (const char *);
112 static void init_asm_output (const char *);
113 static void finalize (void);
115 static void crash_signal (int) ATTRIBUTE_NORETURN;
116 static void setup_core_dumping (void);
117 static void compile_file (void);
119 /* Nonzero to dump debug info whilst parsing (-dy option). */
120 static int set_yydebug;
122 /* True if we don't need a backend (e.g. preprocessing only). */
123 static bool no_backend;
125 /* Length of line when printing switch values. */
128 /* Name of program invoked, sans directories. */
130 const char *progname;
132 /* Copy of argument vector to toplev_main. */
133 static const char **save_argv;
135 /* Name of top-level original source file (what was input to cpp).
136 This comes from the #-command at the beginning of the actual input.
137 If there isn't any there, then this is the cc1 input file name. */
139 const char *main_input_filename;
141 /* Used to enable -fvar-tracking, -fweb and -frename-registers according
142 to optimize and default_debug_hooks in process_options (). */
143 #define AUTODETECT_VALUE 2
145 /* Current position in real source file. */
147 location_t input_location;
149 struct line_maps *line_table;
151 /* Name to use as base of names for dump output files. */
153 const char *dump_base_name;
155 /* Name to use as a base for auxiliary output files. */
157 const char *aux_base_name;
159 /* Prefix for profile data files */
160 const char *profile_data_prefix;
162 /* A mask of target_flags that includes bit X if X was set or cleared
163 on the command line. */
165 int target_flags_explicit;
167 /* Debug hooks - dependent upon command line options. */
169 const struct gcc_debug_hooks *debug_hooks;
171 /* Debug hooks - target default. */
173 static const struct gcc_debug_hooks *default_debug_hooks;
175 /* Other flags saying which kinds of debugging dump have been requested. */
177 int rtl_dump_and_exit;
178 int flag_print_asm_name;
179 enum graph_dump_types graph_dump_format;
181 /* Name for output file of assembly code, specified with -o. */
183 const char *asm_file_name;
185 /* Nonzero means do optimizations. -O.
186 Particular numeric values stand for particular amounts of optimization;
187 thus, -O2 stores 2 here. However, the optimizations beyond the basic
188 ones are not controlled directly by this variable. Instead, they are
189 controlled by individual `flag_...' variables that are defaulted
190 based on this variable. */
194 /* Nonzero means optimize for size. -Os.
195 The only valid values are zero and nonzero. When optimize_size is
196 nonzero, optimize defaults to 2, but certain individual code
197 bloating optimizations are disabled. */
199 int optimize_size = 0;
201 /* The FUNCTION_DECL for the function currently being compiled,
202 or 0 if between functions. */
203 tree current_function_decl;
205 /* Set to the FUNC_BEGIN label of the current function, or NULL
207 const char * current_function_func_begin_label;
209 /* Nonzero means to collect statistics which might be expensive
210 and to print them when we are done. */
211 int flag_detailed_statistics = 0;
213 /* A random sequence of characters, unless overridden by user. */
214 static const char *flag_random_seed;
216 /* A local time stamp derived from the time of compilation. It will be
217 zero if the system cannot provide a time. It will be -1u, if the
218 user has specified a particular random seed. */
223 /* Nonzero means `char' should be signed. */
225 int flag_signed_char;
227 /* Nonzero means give an enum type only as many bytes as it needs. A value
228 of 2 means it has not yet been initialized. */
230 int flag_short_enums;
232 /* Nonzero if structures and unions should be returned in memory.
234 This should only be defined if compatibility with another compiler or
235 with an ABI is needed, because it results in slower code. */
237 #ifndef DEFAULT_PCC_STRUCT_RETURN
238 #define DEFAULT_PCC_STRUCT_RETURN 1
241 /* Nonzero for -fpcc-struct-return: return values the same way PCC does. */
243 int flag_pcc_struct_return = DEFAULT_PCC_STRUCT_RETURN;
245 /* 0 means straightforward implementation of complex divide acceptable.
246 1 means wide ranges of inputs must work for complex divide.
247 2 means C99-like requirements for complex multiply and divide. */
249 int flag_complex_method = 1;
251 /* Nonzero means we should be saving declaration info into a .X file. */
253 int flag_gen_aux_info = 0;
255 /* Specified name of aux-info file. */
257 const char *aux_info_file_name;
259 /* Nonzero if we are compiling code for a shared library, zero for
264 /* Generate code for GNU or NeXT Objective-C runtime environment. */
266 #ifdef NEXT_OBJC_RUNTIME
267 int flag_next_runtime = 1;
269 int flag_next_runtime = 0;
272 /* Set to the default thread-local storage (tls) model to use. */
274 enum tls_model flag_tls_default = TLS_MODEL_GLOBAL_DYNAMIC;
276 /* Set the default region and algorithm for the integrated register
279 enum ira_algorithm flag_ira_algorithm = IRA_ALGORITHM_CB;
280 enum ira_region flag_ira_region = IRA_REGION_MIXED;
282 /* Set the default value for -fira-verbose. */
284 unsigned int flag_ira_verbose = 5;
286 /* Set the default for excess precision. */
288 enum excess_precision flag_excess_precision_cmdline = EXCESS_PRECISION_DEFAULT;
289 enum excess_precision flag_excess_precision = EXCESS_PRECISION_DEFAULT;
291 /* Nonzero means change certain warnings into errors.
292 Usually these are warnings about failure to conform to some standard. */
294 int flag_pedantic_errors = 0;
296 /* Nonzero means make permerror produce warnings instead of errors. */
298 int flag_permissive = 0;
300 /* -dA causes debug commentary information to be produced in
301 the generated assembly code (to make it more readable). This option
302 is generally only of use to those who actually need to read the
303 generated assembly code (perhaps while debugging the compiler itself).
304 Currently, this switch is only used by dwarfout.c; however, it is intended
305 to be a catchall for printing debug information in the assembler file. */
307 int flag_debug_asm = 0;
309 /* -dP causes the rtl to be emitted as a comment in assembly. */
311 int flag_dump_rtl_in_asm = 0;
313 /* When non-NULL, indicates that whenever space is allocated on the
314 stack, the resulting stack pointer must not pass this
315 address---that is, for stacks that grow downward, the stack pointer
316 must always be greater than or equal to this address; for stacks
317 that grow upward, the stack pointer must be less than this address.
318 At present, the rtx may be either a REG or a SYMBOL_REF, although
319 the support provided depends on the backend. */
322 /* Nonzero if we should track variables. When
323 flag_var_tracking == AUTODETECT_VALUE it will be set according
324 to optimize, debug_info_level and debug_hooks in process_options (). */
325 int flag_var_tracking = AUTODETECT_VALUE;
327 /* Type of stack check. */
328 enum stack_check_type flag_stack_check = NO_STACK_CHECK;
330 /* True if the user has tagged the function with the 'section'
333 bool user_defined_section_attribute = false;
335 /* Values of the -falign-* flags: how much to align labels in code.
336 0 means `use default', 1 means `don't align'.
337 For each variable, there is an _log variant which is the power
338 of two not less than the variable, for .align output. */
341 int align_loops_max_skip;
343 int align_jumps_max_skip;
344 int align_labels_log;
345 int align_labels_max_skip;
346 int align_functions_log;
350 const char *const string;
354 lang_independent_options;
356 /* Nonzero if subexpressions must be evaluated from left-to-right. */
357 int flag_evaluation_order = 0;
359 /* The user symbol prefix after having resolved same. */
360 const char *user_label_prefix;
362 static const param_info lang_independent_params[] = {
363 #define DEFPARAM(ENUM, OPTION, HELP, DEFAULT, MIN, MAX) \
364 { OPTION, DEFAULT, false, MIN, MAX, HELP },
365 #include "params.def"
367 { NULL, 0, false, 0, 0, NULL }
370 /* Output files for assembler code (real compiler output)
371 and debugging dumps. */
375 FILE *dump_file = NULL;
376 const char *dump_file_name;
378 /* The current working directory of a translation. It's generally the
379 directory from which compilation was initiated, but a preprocessed
380 file may specify the original directory in which it was
383 static const char *src_pwd;
385 /* Initialize src_pwd with the given string, and return true. If it
386 was already initialized, return false. As a special case, it may
387 be called with a NULL argument to test whether src_pwd has NOT been
391 set_src_pwd (const char *pwd)
395 if (strcmp (src_pwd, pwd) == 0)
401 src_pwd = xstrdup (pwd);
405 /* Return the directory from which the translation unit was initiated,
406 in case set_src_pwd() was not called before to assign it a
422 /* Called when the start of a function definition is parsed,
423 this function prints on stderr the name of the function. */
425 announce_function (tree decl)
429 if (rtl_dump_and_exit)
430 fprintf (stderr, "%s ",
431 identifier_to_locale (IDENTIFIER_POINTER (DECL_NAME (decl))));
433 fprintf (stderr, " %s",
434 identifier_to_locale (lang_hooks.decl_printable_name (decl, 2)));
436 pp_needs_newline (global_dc->printer) = true;
437 diagnostic_set_last_function (global_dc, (diagnostic_info *) NULL);
441 /* Initialize local_tick with the time of day, or -1 if
442 flag_random_seed is set. */
445 init_local_tick (void)
447 if (!flag_random_seed)
449 /* Get some more or less random data. */
450 #ifdef HAVE_GETTIMEOFDAY
454 gettimeofday (&tv, NULL);
455 local_tick = tv.tv_sec * 1000 + tv.tv_usec / 1000;
459 time_t now = time (NULL);
461 if (now != (time_t)-1)
462 local_tick = (unsigned) now;
470 /* Set up a default flag_random_seed and local_tick, unless the user
471 already specified one. Must be called after init_local_tick. */
474 init_random_seed (void)
476 unsigned HOST_WIDE_INT value;
477 static char random_seed[HOST_BITS_PER_WIDE_INT / 4 + 3];
479 value = local_tick ^ getpid ();
481 sprintf (random_seed, HOST_WIDE_INT_PRINT_HEX, value);
482 flag_random_seed = random_seed;
485 /* Obtain the random_seed string. Unless NOINIT, initialize it if
486 it's not provided in the command line. */
489 get_random_seed (bool noinit)
491 if (!flag_random_seed && !noinit)
493 return flag_random_seed;
496 /* Modify the random_seed string to VAL. Return its previous
500 set_random_seed (const char *val)
502 const char *old = flag_random_seed;
503 flag_random_seed = val;
507 /* Decode the string P as an integral parameter.
508 If the string is indeed an integer return its numeric value else
509 issue an Invalid Option error for the option PNAME and return DEFVAL.
510 If PNAME is zero just return DEFVAL, do not call error. */
513 read_integral_parameter (const char *p, const char *pname, const int defval)
515 const char *endp = p;
528 error ("invalid option argument %qs", pname);
535 /* When compiling with a recent enough GCC, we use the GNU C "extern inline"
536 for floor_log2 and exact_log2; see toplev.h. That construct, however,
537 conflicts with the ISO C++ One Definition Rule. */
539 #if GCC_VERSION < 3004 || !defined (__cplusplus)
541 /* Given X, an unsigned number, return the largest int Y such that 2**Y <= X.
542 If X is 0, return -1. */
545 floor_log2 (unsigned HOST_WIDE_INT x)
553 t = HOST_BITS_PER_WIDE_INT - 1 - (int) CLZ_HWI (x);
555 if (HOST_BITS_PER_WIDE_INT > 64)
556 if (x >= (unsigned HOST_WIDE_INT) 1 << (t + 64))
558 if (HOST_BITS_PER_WIDE_INT > 32)
559 if (x >= ((unsigned HOST_WIDE_INT) 1) << (t + 32))
561 if (x >= ((unsigned HOST_WIDE_INT) 1) << (t + 16))
563 if (x >= ((unsigned HOST_WIDE_INT) 1) << (t + 8))
565 if (x >= ((unsigned HOST_WIDE_INT) 1) << (t + 4))
567 if (x >= ((unsigned HOST_WIDE_INT) 1) << (t + 2))
569 if (x >= ((unsigned HOST_WIDE_INT) 1) << (t + 1))
576 /* Return the logarithm of X, base 2, considering X unsigned,
577 if X is a power of 2. Otherwise, returns -1. */
580 exact_log2 (unsigned HOST_WIDE_INT x)
585 return x ? CTZ_HWI (x) : -1;
587 return floor_log2 (x);
591 #endif /* GCC_VERSION < 3004 || !defined (__cplusplus) */
593 /* Handler for fatal signals, such as SIGSEGV. These are transformed
594 into ICE messages, which is much more user friendly. In case the
595 error printer crashes, reset the signal to prevent infinite recursion. */
598 crash_signal (int signo)
600 signal (signo, SIG_DFL);
602 /* If we crashed while processing an ASM statement, then be a little more
603 graceful. It's most likely the user's fault. */
604 if (this_is_asm_operands)
606 output_operand_lossage ("unrecoverable error");
607 exit (FATAL_EXIT_CODE);
610 internal_error ("%s", strsignal (signo));
613 /* Arrange to dump core on error. (The regular error message is still
614 printed first, except in the case of abort().) */
617 setup_core_dumping (void)
620 signal (SIGABRT, SIG_DFL);
622 #if defined(HAVE_SETRLIMIT)
625 if (getrlimit (RLIMIT_CORE, &rlim) != 0)
626 fatal_error ("getting core file size maximum limit: %m");
627 rlim.rlim_cur = rlim.rlim_max;
628 if (setrlimit (RLIMIT_CORE, &rlim) != 0)
629 fatal_error ("setting core file size limit to maximum: %m");
632 diagnostic_abort_on_error (global_dc);
636 /* Strip off a legitimate source ending from the input string NAME of
637 length LEN. Rather than having to know the names used by all of
638 our front ends, we strip off an ending of a period followed by
639 up to five characters. (Java uses ".class".) */
642 strip_off_ending (char *name, int len)
645 for (i = 2; i < 6 && len > i; i++)
647 if (name[len - i] == '.')
649 name[len - i] = '\0';
655 /* Output a quoted string. */
658 output_quoted_string (FILE *asm_file, const char *string)
660 #ifdef OUTPUT_QUOTED_STRING
661 OUTPUT_QUOTED_STRING (asm_file, string);
665 putc ('\"', asm_file);
666 while ((c = *string++) != 0)
670 if (c == '\"' || c == '\\')
671 putc ('\\', asm_file);
675 fprintf (asm_file, "\\%03o", (unsigned char) c);
677 putc ('\"', asm_file);
681 /* Output a file name in the form wanted by System V. */
684 output_file_directive (FILE *asm_file, const char *input_name)
689 if (input_name == NULL)
690 input_name = "<stdin>";
692 input_name = remap_debug_filename (input_name);
694 len = strlen (input_name);
695 na = input_name + len;
697 /* NA gets INPUT_NAME sans directory names. */
698 while (na > input_name)
700 if (IS_DIR_SEPARATOR (na[-1]))
705 #ifdef ASM_OUTPUT_SOURCE_FILENAME
706 ASM_OUTPUT_SOURCE_FILENAME (asm_file, na);
708 fprintf (asm_file, "\t.file\t");
709 output_quoted_string (asm_file, na);
710 fputc ('\n', asm_file);
714 /* A subroutine of wrapup_global_declarations. We've come to the end of
715 the compilation unit. All deferred variables should be undeferred,
716 and all incomplete decls should be finalized. */
719 wrapup_global_declaration_1 (tree decl)
721 /* We're not deferring this any longer. Assignment is conditional to
722 avoid needlessly dirtying PCH pages. */
723 if (CODE_CONTAINS_STRUCT (TREE_CODE (decl), TS_DECL_WITH_VIS)
724 && DECL_DEFER_OUTPUT (decl) != 0)
725 DECL_DEFER_OUTPUT (decl) = 0;
727 if (TREE_CODE (decl) == VAR_DECL && DECL_SIZE (decl) == 0)
728 lang_hooks.finish_incomplete_decl (decl);
731 /* A subroutine of wrapup_global_declarations. Decide whether or not DECL
732 needs to be output. Return true if it is output. */
735 wrapup_global_declaration_2 (tree decl)
737 if (TREE_ASM_WRITTEN (decl) || DECL_EXTERNAL (decl))
740 /* Don't write out static consts, unless we still need them.
742 We also keep static consts if not optimizing (for debugging),
743 unless the user specified -fno-keep-static-consts.
744 ??? They might be better written into the debug information.
745 This is possible when using DWARF.
747 A language processor that wants static constants to be always
748 written out (even if it is not used) is responsible for
749 calling rest_of_decl_compilation itself. E.g. the C front-end
750 calls rest_of_decl_compilation from finish_decl.
751 One motivation for this is that is conventional in some
752 environments to write things like:
753 static const char rcsid[] = "... version string ...";
754 intending to force the string to be in the executable.
756 A language processor that would prefer to have unneeded
757 static constants "optimized away" would just defer writing
758 them out until here. E.g. C++ does this, because static
759 constants are often defined in header files.
761 ??? A tempting alternative (for both C and C++) would be
762 to force a constant to be written if and only if it is
763 defined in a main file, as opposed to an include file. */
765 if (TREE_CODE (decl) == VAR_DECL && TREE_STATIC (decl))
767 struct varpool_node *node;
769 node = varpool_node (decl);
773 else if (node->alias)
775 else if (!cgraph_global_info_ready
777 || TREE_USED (DECL_ASSEMBLER_NAME (decl))))
779 else if (node->needed)
781 else if (DECL_COMDAT (decl))
783 else if (TREE_READONLY (decl) && !TREE_PUBLIC (decl)
784 && (optimize || !flag_keep_static_consts
785 || DECL_ARTIFICIAL (decl)))
790 rest_of_decl_compilation (decl, 1, 1);
798 /* Do any final processing required for the declarations in VEC, of
799 which there are LEN. We write out inline functions and variables
800 that have been deferred until this point, but which are required.
801 Returns nonzero if anything was put out. */
804 wrapup_global_declarations (tree *vec, int len)
806 bool reconsider, output_something = false;
809 for (i = 0; i < len; i++)
810 wrapup_global_declaration_1 (vec[i]);
812 /* Now emit any global variables or functions that we have been
813 putting off. We need to loop in case one of the things emitted
814 here references another one which comes earlier in the list. */
818 for (i = 0; i < len; i++)
819 reconsider |= wrapup_global_declaration_2 (vec[i]);
821 output_something = true;
825 return output_something;
828 /* A subroutine of check_global_declarations. Issue appropriate warnings
829 for the global declaration DECL. */
832 check_global_declaration_1 (tree decl)
834 /* Warn about any function declared static but not defined. We don't
835 warn about variables, because many programs have static variables
836 that exist only to get some text into the object file. */
837 if (TREE_CODE (decl) == FUNCTION_DECL
838 && DECL_INITIAL (decl) == 0
839 && DECL_EXTERNAL (decl)
840 && ! DECL_ARTIFICIAL (decl)
841 && ! TREE_NO_WARNING (decl)
842 && ! TREE_PUBLIC (decl)
843 && (warn_unused_function
844 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl))))
846 if (TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl)))
847 pedwarn (input_location, 0, "%q+F used but never defined", decl);
849 warning (OPT_Wunused_function, "%q+F declared %<static%> but never defined", decl);
850 /* This symbol is effectively an "extern" declaration now. */
851 TREE_PUBLIC (decl) = 1;
852 assemble_external (decl);
855 /* Warn about static fns or vars defined but not used. */
856 if (((warn_unused_function && TREE_CODE (decl) == FUNCTION_DECL)
857 /* We don't warn about "static const" variables because the
858 "rcs_id" idiom uses that construction. */
859 || (warn_unused_variable
860 && TREE_CODE (decl) == VAR_DECL && ! TREE_READONLY (decl)))
861 && ! DECL_IN_SYSTEM_HEADER (decl)
862 && ! TREE_USED (decl)
863 /* The TREE_USED bit for file-scope decls is kept in the identifier,
864 to handle multiple external decls in different scopes. */
865 && ! (DECL_NAME (decl) && TREE_USED (DECL_NAME (decl)))
866 && ! DECL_EXTERNAL (decl)
867 && ! TREE_PUBLIC (decl)
868 /* A volatile variable might be used in some non-obvious way. */
869 && ! TREE_THIS_VOLATILE (decl)
870 /* Global register variables must be declared to reserve them. */
871 && ! (TREE_CODE (decl) == VAR_DECL && DECL_REGISTER (decl))
872 /* Otherwise, ask the language. */
873 && lang_hooks.decls.warn_unused_global (decl))
874 warning ((TREE_CODE (decl) == FUNCTION_DECL)
875 ? OPT_Wunused_function
876 : OPT_Wunused_variable,
877 "%q+D defined but not used", decl);
880 /* Issue appropriate warnings for the global declarations in VEC (of
881 which there are LEN). */
884 check_global_declarations (tree *vec, int len)
888 for (i = 0; i < len; i++)
889 check_global_declaration_1 (vec[i]);
892 /* Emit debugging information for all global declarations in VEC. */
895 emit_debug_global_declarations (tree *vec, int len)
899 /* Avoid confusing the debug information machinery when there are errors. */
900 if (errorcount != 0 || sorrycount != 0)
903 timevar_push (TV_SYMOUT);
904 for (i = 0; i < len; i++)
905 debug_hooks->global_decl (vec[i]);
906 timevar_pop (TV_SYMOUT);
909 /* Warn about a use of an identifier which was marked deprecated. */
911 warn_deprecated_use (tree node, tree attr)
915 if (node == 0 || !warn_deprecated_decl)
921 attr = DECL_ATTRIBUTES (node);
922 else if (TYPE_P (node))
924 tree decl = TYPE_STUB_DECL (node);
926 attr = lookup_attribute ("deprecated",
927 TYPE_ATTRIBUTES (TREE_TYPE (decl)));
932 attr = lookup_attribute ("deprecated", attr);
935 msg = TREE_STRING_POINTER (TREE_VALUE (TREE_VALUE (attr)));
941 expanded_location xloc = expand_location (DECL_SOURCE_LOCATION (node));
943 warning (OPT_Wdeprecated_declarations,
944 "%qD is deprecated (declared at %s:%d): %s",
945 node, xloc.file, xloc.line, msg);
947 warning (OPT_Wdeprecated_declarations,
948 "%qD is deprecated (declared at %s:%d)",
949 node, xloc.file, xloc.line);
951 else if (TYPE_P (node))
953 tree what = NULL_TREE;
954 tree decl = TYPE_STUB_DECL (node);
956 if (TYPE_NAME (node))
958 if (TREE_CODE (TYPE_NAME (node)) == IDENTIFIER_NODE)
959 what = TYPE_NAME (node);
960 else if (TREE_CODE (TYPE_NAME (node)) == TYPE_DECL
961 && DECL_NAME (TYPE_NAME (node)))
962 what = DECL_NAME (TYPE_NAME (node));
967 expanded_location xloc
968 = expand_location (DECL_SOURCE_LOCATION (decl));
972 warning (OPT_Wdeprecated_declarations,
973 "%qE is deprecated (declared at %s:%d): %s",
974 what, xloc.file, xloc.line, msg);
976 warning (OPT_Wdeprecated_declarations,
977 "%qE is deprecated (declared at %s:%d)", what,
978 xloc.file, xloc.line);
983 warning (OPT_Wdeprecated_declarations,
984 "type is deprecated (declared at %s:%d): %s",
985 xloc.file, xloc.line, msg);
987 warning (OPT_Wdeprecated_declarations,
988 "type is deprecated (declared at %s:%d)",
989 xloc.file, xloc.line);
997 warning (OPT_Wdeprecated_declarations, "%qE is deprecated: %s",
1000 warning (OPT_Wdeprecated_declarations, "%qE is deprecated", what);
1005 warning (OPT_Wdeprecated_declarations, "type is deprecated: %s",
1008 warning (OPT_Wdeprecated_declarations, "type is deprecated");
1014 /* Compile an entire translation unit. Write a file of assembly
1015 output and various debugging dumps. */
1020 /* Initialize yet another pass. */
1022 ggc_protect_identifiers = true;
1025 init_final (main_input_filename);
1026 coverage_init (aux_base_name);
1029 timevar_push (TV_PARSE);
1031 /* Call the parser, which parses the entire file (calling
1032 rest_of_compilation for each function). */
1033 lang_hooks.parse_file (set_yydebug);
1035 /* Compilation is now finished except for writing
1036 what's left of the symbol table output. */
1037 timevar_pop (TV_PARSE);
1039 if (flag_syntax_only)
1042 ggc_protect_identifiers = false;
1044 lang_hooks.decls.final_write_globals ();
1046 if (errorcount || sorrycount)
1049 varpool_assemble_pending_decls ();
1050 finish_aliases_2 ();
1052 /* Likewise for mudflap static object registrations. */
1054 mudflap_finish_file ();
1056 /* Likewise for emulated thread-local storage. */
1057 if (!targetm.have_tls)
1060 output_shared_constant_pool ();
1061 output_object_blocks ();
1063 /* Write out any pending weak symbol declarations. */
1066 /* Do dbx symbols. */
1067 timevar_push (TV_SYMOUT);
1069 #if defined DWARF2_DEBUGGING_INFO || defined DWARF2_UNWIND_INFO
1070 if (dwarf2out_do_frame ())
1071 dwarf2out_frame_finish ();
1074 (*debug_hooks->finish) (main_input_filename);
1075 timevar_pop (TV_SYMOUT);
1077 /* Output some stuff at end of file if nec. */
1079 dw2_output_indirect_constants ();
1081 /* Flush any pending external directives. */
1082 process_pending_assemble_externals ();
1084 /* Attach a special .ident directive to the end of the file to identify
1085 the version of GCC which compiled this code. The format of the .ident
1086 string is patterned after the ones produced by native SVR4 compilers. */
1090 const char *pkg_version = "(GNU) ";
1092 if (strcmp ("(GCC) ", pkgversion_string))
1093 pkg_version = pkgversion_string;
1094 fprintf (asm_out_file, "%s\"GCC: %s%s\"\n",
1095 IDENT_ASM_OP, pkg_version, version_string);
1099 /* This must be at the end. Some target ports emit end of file directives
1100 into the assembly file here, and hence we can not output anything to the
1101 assembly file after this point. */
1102 targetm.asm_out.file_end ();
1105 /* Parse a -d... command line switch. */
1108 decode_d_option (const char *arg)
1119 flag_print_asm_name = 1;
1122 flag_dump_rtl_in_asm = 1;
1123 flag_print_asm_name = 1;
1126 graph_dump_format = vcg;
1129 rtl_dump_and_exit = 1;
1134 case 'D': /* These are handled by the preprocessor. */
1141 setup_core_dumping();
1144 enable_rtl_dump_file ();
1148 warning (0, "unrecognized gcc debugging option: %c", c);
1153 /* Indexed by enum debug_info_type. */
1154 const char *const debug_type_names[] =
1156 "none", "stabs", "coff", "dwarf-2", "xcoff", "vms"
1159 /* Print version information to FILE.
1160 Each line begins with INDENT (for the case where FILE is the
1161 assembler output file). */
1164 print_version (FILE *file, const char *indent)
1166 static const char fmt1[] =
1168 N_("%s%s%s %sversion %s (%s)\n%s\tcompiled by GNU C version %s, ")
1170 N_("%s%s%s %sversion %s (%s) compiled by CC, ")
1174 static const char fmt2[] =
1175 N_("GMP version %s, MPFR version %s, MPC version %s\n");
1177 static const char fmt2[] =
1178 N_("GMP version %s, MPFR version %s\n");
1180 static const char fmt3[] =
1181 N_("%s%swarning: %s header version %s differs from library version %s.\n");
1182 static const char fmt4[] =
1183 N_("%s%sGGC heuristics: --param ggc-min-expand=%d --param ggc-min-heapsize=%d\n");
1185 #define __VERSION__ "[?]"
1188 file == stderr ? _(fmt1) : fmt1,
1189 indent, *indent != 0 ? " " : "",
1190 lang_hooks.name, pkgversion_string, version_string, TARGET_NAME,
1191 indent, __VERSION__);
1193 /* We need to stringify the GMP macro values. Ugh, gmp_version has
1194 two string formats, "i.j.k" and "i.j" when k is zero. As of
1195 gmp-4.3.0, GMP always uses the 3 number format. */
1196 #define GCC_GMP_STRINGIFY_VERSION3(X) #X
1197 #define GCC_GMP_STRINGIFY_VERSION2(X) GCC_GMP_STRINGIFY_VERSION3(X)
1198 #define GCC_GMP_VERSION_NUM(X,Y,Z) (((X) << 16L) | ((Y) << 8) | (Z))
1199 #define GCC_GMP_VERSION \
1200 GCC_GMP_VERSION_NUM(__GNU_MP_VERSION, __GNU_MP_VERSION_MINOR, __GNU_MP_VERSION_PATCHLEVEL)
1201 #if GCC_GMP_VERSION < GCC_GMP_VERSION_NUM(4,3,0) && __GNU_MP_VERSION_PATCHLEVEL == 0
1202 #define GCC_GMP_STRINGIFY_VERSION GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION) "." \
1203 GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION_MINOR)
1205 #define GCC_GMP_STRINGIFY_VERSION GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION) "." \
1206 GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION_MINOR) "." \
1207 GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION_PATCHLEVEL)
1210 file == stderr ? _(fmt2) : fmt2,
1211 GCC_GMP_STRINGIFY_VERSION, MPFR_VERSION_STRING
1213 , MPC_VERSION_STRING
1216 if (strcmp (GCC_GMP_STRINGIFY_VERSION, gmp_version))
1218 file == stderr ? _(fmt3) : fmt3,
1219 indent, *indent != 0 ? " " : "",
1220 "GMP", GCC_GMP_STRINGIFY_VERSION, gmp_version);
1221 if (strcmp (MPFR_VERSION_STRING, mpfr_get_version ()))
1223 file == stderr ? _(fmt3) : fmt3,
1224 indent, *indent != 0 ? " " : "",
1225 "MPFR", MPFR_VERSION_STRING, mpfr_get_version ());
1227 if (strcmp (MPC_VERSION_STRING, mpc_get_version ()))
1229 file == stderr ? _(fmt3) : fmt3,
1230 indent, *indent != 0 ? " " : "",
1231 "MPC", MPC_VERSION_STRING, mpc_get_version ());
1234 file == stderr ? _(fmt4) : fmt4,
1235 indent, *indent != 0 ? " " : "",
1236 PARAM_VALUE (GGC_MIN_EXPAND), PARAM_VALUE (GGC_MIN_HEAPSIZE));
1238 print_plugins_versions (file, indent);
1241 #ifdef ASM_COMMENT_START
1243 print_to_asm_out_file (print_switch_type type, const char * text)
1245 bool prepend_sep = true;
1249 case SWITCH_TYPE_LINE_END:
1250 putc ('\n', asm_out_file);
1253 case SWITCH_TYPE_LINE_START:
1254 fputs (ASM_COMMENT_START, asm_out_file);
1255 return strlen (ASM_COMMENT_START);
1257 case SWITCH_TYPE_DESCRIPTIVE:
1258 if (ASM_COMMENT_START[0] == 0)
1259 prepend_sep = false;
1261 case SWITCH_TYPE_PASSED:
1262 case SWITCH_TYPE_ENABLED:
1264 fputc (' ', asm_out_file);
1265 fprintf (asm_out_file, text);
1266 /* No need to return the length here as
1267 print_single_switch has already done it. */
1277 print_to_stderr (print_switch_type type, const char * text)
1281 case SWITCH_TYPE_LINE_END:
1282 putc ('\n', stderr);
1285 case SWITCH_TYPE_LINE_START:
1288 case SWITCH_TYPE_PASSED:
1289 case SWITCH_TYPE_ENABLED:
1290 fputc (' ', stderr);
1293 case SWITCH_TYPE_DESCRIPTIVE:
1294 fprintf (stderr, text);
1295 /* No need to return the length here as
1296 print_single_switch has already done it. */
1304 /* Print an option value and return the adjusted position in the line.
1305 ??? print_fn doesn't handle errors, eg disk full; presumably other
1306 code will catch a disk full though. */
1309 print_single_switch (print_switch_fn_type print_fn,
1311 print_switch_type type,
1314 /* The ultrix fprintf returns 0 on success, so compute the result
1315 we want here since we need it for the following test. The +1
1316 is for the separator character that will probably be emitted. */
1317 int len = strlen (text) + 1;
1320 && pos + len > MAX_LINE)
1322 print_fn (SWITCH_TYPE_LINE_END, NULL);
1327 pos += print_fn (SWITCH_TYPE_LINE_START, NULL);
1329 print_fn (type, text);
1333 /* Print active target switches using PRINT_FN.
1334 POS is the current cursor position and MAX is the size of a "line".
1335 Each line begins with INDENT and ends with TERM.
1336 Each switch is separated from the next by SEP. */
1339 print_switch_values (print_switch_fn_type print_fn)
1345 /* Fill in the -frandom-seed option, if the user didn't pass it, so
1346 that it can be printed below. This helps reproducibility. */
1347 if (!flag_random_seed)
1348 init_random_seed ();
1350 /* Print the options as passed. */
1351 pos = print_single_switch (print_fn, pos,
1352 SWITCH_TYPE_DESCRIPTIVE, _("options passed: "));
1354 for (p = &save_argv[1]; *p != NULL; p++)
1359 if (strcmp (*p, "-o") == 0
1360 || strcmp (*p, "-dumpbase") == 0
1361 || strcmp (*p, "-auxbase") == 0)
1368 if (strcmp (*p, "-quiet") == 0
1369 || strcmp (*p, "-version") == 0)
1376 pos = print_single_switch (print_fn, pos, SWITCH_TYPE_PASSED, *p);
1380 print_fn (SWITCH_TYPE_LINE_END, NULL);
1382 /* Print the -f and -m options that have been enabled.
1383 We don't handle language specific options but printing argv
1385 pos = print_single_switch (print_fn, 0,
1386 SWITCH_TYPE_DESCRIPTIVE, _("options enabled: "));
1388 for (j = 0; j < cl_options_count; j++)
1389 if ((cl_options[j].flags & CL_REPORT)
1390 && option_enabled (j) > 0)
1391 pos = print_single_switch (print_fn, pos,
1392 SWITCH_TYPE_ENABLED, cl_options[j].opt_text);
1394 print_fn (SWITCH_TYPE_LINE_END, NULL);
1397 /* Open assembly code output file. Do this even if -fsyntax-only is
1398 on, because then the driver will have provided the name of a
1399 temporary file or bit bucket for us. NAME is the file specified on
1400 the command line, possibly NULL. */
1402 init_asm_output (const char *name)
1404 if (name == NULL && asm_file_name == 0)
1405 asm_out_file = stdout;
1408 if (asm_file_name == 0)
1410 int len = strlen (dump_base_name);
1411 char *dumpname = XNEWVEC (char, len + 6);
1413 memcpy (dumpname, dump_base_name, len + 1);
1414 strip_off_ending (dumpname, len);
1415 strcat (dumpname, ".s");
1416 asm_file_name = dumpname;
1418 if (!strcmp (asm_file_name, "-"))
1419 asm_out_file = stdout;
1421 asm_out_file = fopen (asm_file_name, "w+b");
1422 if (asm_out_file == 0)
1423 fatal_error ("can%'t open %s for writing: %m", asm_file_name);
1426 if (!flag_syntax_only)
1428 targetm.asm_out.file_start ();
1430 if (flag_record_gcc_switches)
1432 if (targetm.asm_out.record_gcc_switches)
1434 /* Let the target know that we are about to start recording. */
1435 targetm.asm_out.record_gcc_switches (SWITCH_TYPE_DESCRIPTIVE,
1437 /* Now record the switches. */
1438 print_switch_values (targetm.asm_out.record_gcc_switches);
1439 /* Let the target know that the recording is over. */
1440 targetm.asm_out.record_gcc_switches (SWITCH_TYPE_DESCRIPTIVE,
1444 inform (input_location, "-frecord-gcc-switches is not supported by the current target");
1447 #ifdef ASM_COMMENT_START
1448 if (flag_verbose_asm)
1450 /* Print the list of switches in effect
1451 into the assembler file as comments. */
1452 print_version (asm_out_file, ASM_COMMENT_START);
1453 print_switch_values (print_to_asm_out_file);
1454 fprintf (asm_out_file, "\n");
1460 /* Return true if the state of option OPTION should be stored in PCH files
1461 and checked by default_pch_valid_p. Store the option's current state
1465 option_affects_pch_p (int option, struct cl_option_state *state)
1467 if ((cl_options[option].flags & CL_TARGET) == 0)
1469 if (cl_options[option].flag_var == &target_flags)
1470 if (targetm.check_pch_target_flags)
1472 return get_option_state (option, state);
1475 /* Default version of get_pch_validity.
1476 By default, every flag difference is fatal; that will be mostly right for
1477 most targets, but completely right for very few. */
1480 default_get_pch_validity (size_t *len)
1482 struct cl_option_state state;
1487 if (targetm.check_pch_target_flags)
1488 *len += sizeof (target_flags);
1489 for (i = 0; i < cl_options_count; i++)
1490 if (option_affects_pch_p (i, &state))
1493 result = r = XNEWVEC (char, *len);
1497 if (targetm.check_pch_target_flags)
1499 memcpy (r, &target_flags, sizeof (target_flags));
1500 r += sizeof (target_flags);
1503 for (i = 0; i < cl_options_count; i++)
1504 if (option_affects_pch_p (i, &state))
1506 memcpy (r, state.data, state.size);
1513 /* Return a message which says that a PCH file was created with a different
1514 setting of OPTION. */
1517 pch_option_mismatch (const char *option)
1521 asprintf (&r, _("created and used with differing settings of '%s'"), option);
1523 return _("out of memory");
1527 /* Default version of pch_valid_p. */
1530 default_pch_valid_p (const void *data_p, size_t len)
1532 struct cl_option_state state;
1533 const char *data = (const char *)data_p;
1536 /* -fpic and -fpie also usually make a PCH invalid. */
1537 if (data[0] != flag_pic)
1538 return _("created and used with different settings of -fpic");
1539 if (data[1] != flag_pie)
1540 return _("created and used with different settings of -fpie");
1543 /* Check target_flags. */
1544 if (targetm.check_pch_target_flags)
1549 memcpy (&tf, data, sizeof (target_flags));
1550 data += sizeof (target_flags);
1551 len -= sizeof (target_flags);
1552 r = targetm.check_pch_target_flags (tf);
1557 for (i = 0; i < cl_options_count; i++)
1558 if (option_affects_pch_p (i, &state))
1560 if (memcmp (data, state.data, state.size) != 0)
1561 return pch_option_mismatch (cl_options[i].opt_text);
1569 /* Default tree printer. Handles declarations only. */
1571 default_tree_printer (pretty_printer * pp, text_info *text, const char *spec,
1572 int precision, bool wide, bool set_locus, bool hash)
1576 /* FUTURE: %+x should set the locus. */
1577 if (precision != 0 || wide || hash)
1583 t = va_arg (*text->args_ptr, tree);
1584 if (TREE_CODE (t) == IDENTIFIER_NODE)
1586 pp_identifier (pp, IDENTIFIER_POINTER (t));
1592 t = va_arg (*text->args_ptr, tree);
1593 if (DECL_DEBUG_EXPR_IS_FROM (t) && DECL_DEBUG_EXPR (t))
1594 t = DECL_DEBUG_EXPR (t);
1599 t = va_arg (*text->args_ptr, tree);
1606 if (set_locus && text->locus)
1607 *text->locus = DECL_SOURCE_LOCATION (t);
1611 const char *n = DECL_NAME (t)
1612 ? identifier_to_locale (lang_hooks.decl_printable_name (t, 2))
1617 dump_generic_node (pp, t, 0, TDF_DIAGNOSTIC, 0);
1622 /* A helper function; used as the reallocator function for cpp's line
1625 realloc_for_line_map (void *ptr, size_t len)
1627 return ggc_realloc (ptr, len);
1630 /* Initialization of the front end environment, before command line
1631 options are parsed. Signal handlers, internationalization etc.
1632 ARGV0 is main's argv[0]. */
1634 general_init (const char *argv0)
1638 p = argv0 + strlen (argv0);
1639 while (p != argv0 && !IS_DIR_SEPARATOR (p[-1]))
1643 xmalloc_set_program_name (progname);
1647 /* Unlock the stdio streams. */
1648 unlock_std_streams ();
1650 gcc_init_libintl ();
1652 /* Initialize the diagnostics reporting machinery, so option parsing
1653 can give warnings and errors. */
1654 diagnostic_initialize (global_dc);
1655 /* Set a default printer. Language specific initializations will
1656 override it later. */
1657 pp_format_decoder (global_dc->printer) = &default_tree_printer;
1659 /* Trap fatal signals, e.g. SIGSEGV, and convert them to ICE messages. */
1661 signal (SIGSEGV, crash_signal);
1664 signal (SIGILL, crash_signal);
1667 signal (SIGBUS, crash_signal);
1670 signal (SIGABRT, crash_signal);
1672 #if defined SIGIOT && (!defined SIGABRT || SIGABRT != SIGIOT)
1673 signal (SIGIOT, crash_signal);
1676 signal (SIGFPE, crash_signal);
1679 /* Other host-specific signal setup. */
1680 (*host_hooks.extra_signals)();
1682 /* Initialize the garbage-collector, string pools and tree type hash
1686 line_table = GGC_NEW (struct line_maps);
1687 linemap_init (line_table);
1688 line_table->reallocator = realloc_for_line_map;
1691 /* Initialize register usage now so switches may override. */
1694 /* Register the language-independent parameters. */
1695 add_params (lang_independent_params, LAST_PARAM);
1697 /* This must be done after add_params but before argument processing. */
1698 init_ggc_heuristics();
1699 init_optimization_passes ();
1700 statistics_early_init ();
1703 /* Return true if the current target supports -fsection-anchors. */
1706 target_supports_section_anchors_p (void)
1708 if (targetm.min_anchor_offset == 0 && targetm.max_anchor_offset == 0)
1711 if (targetm.asm_out.output_anchor == NULL)
1717 /* Default the align_* variables to 1 if they're still unset, and
1718 set up the align_*_log variables. */
1720 init_alignments (void)
1722 if (align_loops <= 0)
1724 if (align_loops_max_skip > align_loops)
1725 align_loops_max_skip = align_loops - 1;
1726 align_loops_log = floor_log2 (align_loops * 2 - 1);
1727 if (align_jumps <= 0)
1729 if (align_jumps_max_skip > align_jumps)
1730 align_jumps_max_skip = align_jumps - 1;
1731 align_jumps_log = floor_log2 (align_jumps * 2 - 1);
1732 if (align_labels <= 0)
1734 align_labels_log = floor_log2 (align_labels * 2 - 1);
1735 if (align_labels_max_skip > align_labels)
1736 align_labels_max_skip = align_labels - 1;
1737 if (align_functions <= 0)
1738 align_functions = 1;
1739 align_functions_log = floor_log2 (align_functions * 2 - 1);
1742 /* Process the options that have been parsed. */
1744 process_options (void)
1746 /* Just in case lang_hooks.post_options ends up calling a debug_hook.
1747 This can happen with incorrect pre-processed input. */
1748 debug_hooks = &do_nothing_debug_hooks;
1750 /* This replaces set_Wunused. */
1751 if (warn_unused_function == -1)
1752 warn_unused_function = warn_unused;
1753 if (warn_unused_label == -1)
1754 warn_unused_label = warn_unused;
1755 /* Wunused-parameter is enabled if both -Wunused -Wextra are enabled. */
1756 if (warn_unused_parameter == -1)
1757 warn_unused_parameter = (warn_unused && extra_warnings);
1758 if (warn_unused_variable == -1)
1759 warn_unused_variable = warn_unused;
1760 if (warn_unused_value == -1)
1761 warn_unused_value = warn_unused;
1763 /* This replaces set_Wextra. */
1764 if (warn_uninitialized == -1)
1765 warn_uninitialized = extra_warnings;
1767 /* Allow the front end to perform consistency checks and do further
1768 initialization based on the command line options. This hook also
1769 sets the original filename if appropriate (e.g. foo.i -> foo.c)
1770 so we can correctly initialize debug output. */
1771 no_backend = lang_hooks.post_options (&main_input_filename);
1773 #ifdef OVERRIDE_OPTIONS
1774 /* Some machines may reject certain combinations of options. */
1778 if (flag_section_anchors && !target_supports_section_anchors_p ())
1780 warning (OPT_fsection_anchors,
1781 "this target does not support %qs", "-fsection-anchors");
1782 flag_section_anchors = 0;
1785 if (flag_short_enums == 2)
1786 flag_short_enums = targetm.default_short_enums ();
1788 /* Set aux_base_name if not already set. */
1791 else if (main_input_filename)
1793 char *name = xstrdup (lbasename (main_input_filename));
1795 strip_off_ending (name, strlen (name));
1796 aux_base_name = name;
1799 aux_base_name = "gccaux";
1804 || flag_loop_interchange
1805 || flag_loop_strip_mine
1806 || flag_graphite_identity)
1807 sorry ("Graphite loop optimizations cannot be used");
1810 /* Unrolling all loops implies that standard loop unrolling must also
1812 if (flag_unroll_all_loops)
1813 flag_unroll_loops = 1;
1815 /* The loop unrolling code assumes that cse will be run after loop.
1816 web and rename-registers also help when run after loop unrolling. */
1818 if (flag_rerun_cse_after_loop == AUTODETECT_VALUE)
1819 flag_rerun_cse_after_loop = flag_unroll_loops || flag_peel_loops;
1820 if (flag_web == AUTODETECT_VALUE)
1821 flag_web = flag_unroll_loops || flag_peel_loops;
1822 if (flag_rename_registers == AUTODETECT_VALUE)
1823 flag_rename_registers = flag_unroll_loops || flag_peel_loops;
1825 if (flag_non_call_exceptions)
1826 flag_asynchronous_unwind_tables = 1;
1827 if (flag_asynchronous_unwind_tables)
1828 flag_unwind_tables = 1;
1830 if (flag_value_profile_transformations)
1831 flag_profile_values = 1;
1833 /* Warn about options that are not supported on this machine. */
1834 #ifndef INSN_SCHEDULING
1835 if (flag_schedule_insns || flag_schedule_insns_after_reload)
1836 warning (0, "instruction scheduling not supported on this target machine");
1839 if (flag_delayed_branch)
1840 warning (0, "this target machine does not have delayed branches");
1843 user_label_prefix = USER_LABEL_PREFIX;
1844 if (flag_leading_underscore != -1)
1846 /* If the default prefix is more complicated than "" or "_",
1847 issue a warning and ignore this option. */
1848 if (user_label_prefix[0] == 0 ||
1849 (user_label_prefix[0] == '_' && user_label_prefix[1] == 0))
1851 user_label_prefix = flag_leading_underscore ? "_" : "";
1854 warning (0, "-f%sleading-underscore not supported on this target machine",
1855 flag_leading_underscore ? "" : "no-");
1858 /* If we are in verbose mode, write out the version and maybe all the
1859 option flags in use. */
1862 print_version (stderr, "");
1864 print_switch_values (print_to_stderr);
1867 if (flag_syntax_only)
1869 write_symbols = NO_DEBUG;
1873 /* A lot of code assumes write_symbols == NO_DEBUG if the debugging
1875 if (debug_info_level == DINFO_LEVEL_NONE)
1876 write_symbols = NO_DEBUG;
1878 /* Now we know write_symbols, set up the debug hooks based on it.
1879 By default we do nothing for debug output. */
1880 if (PREFERRED_DEBUGGING_TYPE == NO_DEBUG)
1881 default_debug_hooks = &do_nothing_debug_hooks;
1882 #if defined(DBX_DEBUGGING_INFO)
1883 else if (PREFERRED_DEBUGGING_TYPE == DBX_DEBUG)
1884 default_debug_hooks = &dbx_debug_hooks;
1886 #if defined(XCOFF_DEBUGGING_INFO)
1887 else if (PREFERRED_DEBUGGING_TYPE == XCOFF_DEBUG)
1888 default_debug_hooks = &xcoff_debug_hooks;
1890 #ifdef SDB_DEBUGGING_INFO
1891 else if (PREFERRED_DEBUGGING_TYPE == SDB_DEBUG)
1892 default_debug_hooks = &sdb_debug_hooks;
1894 #ifdef DWARF2_DEBUGGING_INFO
1895 else if (PREFERRED_DEBUGGING_TYPE == DWARF2_DEBUG)
1896 default_debug_hooks = &dwarf2_debug_hooks;
1898 #ifdef VMS_DEBUGGING_INFO
1899 else if (PREFERRED_DEBUGGING_TYPE == VMS_DEBUG
1900 || PREFERRED_DEBUGGING_TYPE == VMS_AND_DWARF2_DEBUG)
1901 default_debug_hooks = &vmsdbg_debug_hooks;
1904 if (write_symbols == NO_DEBUG)
1906 #if defined(DBX_DEBUGGING_INFO)
1907 else if (write_symbols == DBX_DEBUG)
1908 debug_hooks = &dbx_debug_hooks;
1910 #if defined(XCOFF_DEBUGGING_INFO)
1911 else if (write_symbols == XCOFF_DEBUG)
1912 debug_hooks = &xcoff_debug_hooks;
1914 #ifdef SDB_DEBUGGING_INFO
1915 else if (write_symbols == SDB_DEBUG)
1916 debug_hooks = &sdb_debug_hooks;
1918 #ifdef DWARF2_DEBUGGING_INFO
1919 else if (write_symbols == DWARF2_DEBUG)
1920 debug_hooks = &dwarf2_debug_hooks;
1922 #ifdef VMS_DEBUGGING_INFO
1923 else if (write_symbols == VMS_DEBUG || write_symbols == VMS_AND_DWARF2_DEBUG)
1924 debug_hooks = &vmsdbg_debug_hooks;
1927 error ("target system does not support the \"%s\" debug format",
1928 debug_type_names[write_symbols]);
1930 /* Now we know which debug output will be used so we can set
1931 flag_var_tracking, flag_rename_registers if the user has
1932 not specified them. */
1933 if (debug_info_level < DINFO_LEVEL_NORMAL
1934 || debug_hooks->var_location == do_nothing_debug_hooks.var_location)
1936 if (flag_var_tracking == 1
1937 || flag_var_tracking_uninit == 1)
1939 if (debug_info_level < DINFO_LEVEL_NORMAL)
1940 warning (0, "variable tracking requested, but useless unless "
1941 "producing debug info");
1943 warning (0, "variable tracking requested, but not supported "
1944 "by this debug format");
1946 flag_var_tracking = 0;
1947 flag_var_tracking_uninit = 0;
1950 if (flag_rename_registers == AUTODETECT_VALUE)
1951 flag_rename_registers = default_debug_hooks->var_location
1952 != do_nothing_debug_hooks.var_location;
1954 if (flag_var_tracking == AUTODETECT_VALUE)
1955 flag_var_tracking = optimize >= 1;
1957 if (flag_tree_cselim == AUTODETECT_VALUE)
1958 #ifdef HAVE_conditional_move
1959 flag_tree_cselim = 1;
1961 flag_tree_cselim = 0;
1964 /* If the user specifically requested variable tracking with tagging
1965 uninitialized variables, we need to turn on variable tracking.
1966 (We already determined above that variable tracking is feasible.) */
1967 if (flag_var_tracking_uninit)
1968 flag_var_tracking = 1;
1970 /* If auxiliary info generation is desired, open the output file.
1971 This goes in the same directory as the source file--unlike
1972 all the other output files. */
1973 if (flag_gen_aux_info)
1975 aux_info_file = fopen (aux_info_file_name, "w");
1976 if (aux_info_file == 0)
1977 fatal_error ("can%'t open %s: %m", aux_info_file_name);
1980 if (! targetm.have_named_sections)
1982 if (flag_function_sections)
1984 warning (0, "-ffunction-sections not supported for this target");
1985 flag_function_sections = 0;
1987 if (flag_data_sections)
1989 warning (0, "-fdata-sections not supported for this target");
1990 flag_data_sections = 0;
1994 if (flag_function_sections && profile_flag)
1996 warning (0, "-ffunction-sections disabled; it makes profiling impossible");
1997 flag_function_sections = 0;
2000 #ifndef HAVE_prefetch
2001 if (flag_prefetch_loop_arrays)
2003 warning (0, "-fprefetch-loop-arrays not supported for this target");
2004 flag_prefetch_loop_arrays = 0;
2007 if (flag_prefetch_loop_arrays && !HAVE_prefetch)
2009 warning (0, "-fprefetch-loop-arrays not supported for this target (try -march switches)");
2010 flag_prefetch_loop_arrays = 0;
2014 /* This combination of options isn't handled for i386 targets and doesn't
2015 make much sense anyway, so don't allow it. */
2016 if (flag_prefetch_loop_arrays && optimize_size)
2018 warning (0, "-fprefetch-loop-arrays is not supported with -Os");
2019 flag_prefetch_loop_arrays = 0;
2022 /* The presence of IEEE signaling NaNs, implies all math can trap. */
2023 if (flag_signaling_nans)
2024 flag_trapping_math = 1;
2026 /* We cannot reassociate if we want traps or signed zeros. Â */
2027 if (flag_associative_math && (flag_trapping_math || flag_signed_zeros))
2029 warning (0, "-fassociative-math disabled; other options take precedence");
2030 flag_associative_math = 0;
2033 /* With -fcx-limited-range, we do cheap and quick complex arithmetic. */
2034 if (flag_cx_limited_range)
2035 flag_complex_method = 0;
2037 /* With -fcx-fortran-rules, we do something in-between cheap and C99. */
2038 if (flag_cx_fortran_rules)
2039 flag_complex_method = 1;
2041 /* Targets must be able to place spill slots at lower addresses. If the
2042 target already uses a soft frame pointer, the transition is trivial. */
2043 if (!FRAME_GROWS_DOWNWARD && flag_stack_protect)
2045 warning (0, "-fstack-protector not supported for this target");
2046 flag_stack_protect = 0;
2048 if (!flag_stack_protect)
2049 warn_stack_protect = 0;
2051 /* ??? Unwind info is not correct around the CFG unless either a frame
2052 pointer is present or A_O_A is set. Fixing this requires rewriting
2053 unwind info generation to be aware of the CFG and propagating states
2055 if (flag_unwind_tables && !ACCUMULATE_OUTGOING_ARGS
2056 && flag_omit_frame_pointer)
2058 warning (0, "unwind tables currently require a frame pointer "
2060 flag_omit_frame_pointer = 0;
2064 /* This function can be called multiple times to reinitialize the compiler
2065 back end when register classes or instruction sets have changed,
2066 before each function. */
2068 backend_init_target (void)
2070 /* Initialize alignment variables. */
2073 /* This reinitializes hard_frame_pointer, and calls init_reg_modes_target()
2074 to initialize reg_raw_mode[]. */
2077 /* This invokes target hooks to set fixed_reg[] etc, which is
2081 /* This depends on stack_pointer_rtx. */
2082 init_fake_stack_mems ();
2084 /* Sets static_base_value[HARD_FRAME_POINTER_REGNUM], which is
2086 init_alias_target ();
2088 /* Depends on HARD_FRAME_POINTER_REGNUM. */
2091 /* The following initialization functions need to generate rtl, so
2092 provide a dummy function context for them. */
2093 init_dummy_function_start ();
2095 /* rtx_cost is mode-dependent, so cached values need to be recomputed
2096 on a mode change. */
2099 /* We may need to recompute regno_save_code[] and regno_restore_code[]
2100 after a mode change as well. */
2101 if (flag_caller_saves)
2102 init_caller_save ();
2103 expand_dummy_function_end ();
2106 /* Initialize the compiler back end. This function is called only once,
2107 when starting the compiler. */
2111 init_emit_once (debug_info_level == DINFO_LEVEL_NORMAL
2112 || debug_info_level == DINFO_LEVEL_VERBOSE
2113 #ifdef VMS_DEBUGGING_INFO
2114 /* Enable line number info for traceback. */
2115 || debug_info_level > DINFO_LEVEL_NONE
2117 || flag_test_coverage);
2120 init_inline_once ();
2121 init_varasm_once ();
2122 save_register_info ();
2124 /* Initialize the target-specific back end pieces. */
2126 backend_init_target ();
2129 /* Initialize excess precision settings. */
2131 init_excess_precision (void)
2133 /* Adjust excess precision handling based on the target options. If
2134 the front end cannot handle it, flag_excess_precision_cmdline
2135 will already have been set accordingly in the post_options
2137 gcc_assert (flag_excess_precision_cmdline != EXCESS_PRECISION_DEFAULT);
2138 flag_excess_precision = flag_excess_precision_cmdline;
2139 if (flag_unsafe_math_optimizations)
2140 flag_excess_precision = EXCESS_PRECISION_FAST;
2141 if (flag_excess_precision == EXCESS_PRECISION_STANDARD)
2143 int flt_eval_method = TARGET_FLT_EVAL_METHOD;
2144 switch (flt_eval_method)
2148 /* Either the target acts unpredictably (-1) or has all the
2149 operations required not to have excess precision (0). */
2150 flag_excess_precision = EXCESS_PRECISION_FAST;
2154 /* In these cases, predictable excess precision makes
2158 /* Any other implementation-defined FLT_EVAL_METHOD values
2159 require the compiler to handle the associated excess
2160 precision rules in excess_precision_type. */
2166 /* Initialize things that are both lang-dependent and target-dependent.
2167 This function can be called more than once if target parameters change. */
2169 lang_dependent_init_target (void)
2171 /* This determines excess precision settings. */
2172 init_excess_precision ();
2174 /* This creates various _DECL nodes, so needs to be called after the
2175 front end is initialized. It also depends on the HAVE_xxx macros
2176 generated from the target machine description. */
2179 /* The following initialization functions need to generate rtl, so
2180 provide a dummy function context for them. */
2181 init_dummy_function_start ();
2183 /* Do the target-specific parts of expr initialization. */
2184 init_expr_target ();
2186 /* Although the actions of these functions are language-independent,
2187 they use optabs, so we cannot call them from backend_init. */
2191 expand_dummy_function_end ();
2194 /* Language-dependent initialization. Returns nonzero on success. */
2196 lang_dependent_init (const char *name)
2198 location_t save_loc = input_location;
2199 if (dump_base_name == 0)
2200 dump_base_name = name && name[0] ? name : "gccdump";
2202 /* Other front-end initialization. */
2203 input_location = BUILTINS_LOCATION;
2204 if (lang_hooks.init () == 0)
2206 input_location = save_loc;
2208 init_asm_output (name);
2210 /* This creates various _DECL nodes, so needs to be called after the
2211 front end is initialized. */
2214 /* Do the target-specific parts of the initialization. */
2215 lang_dependent_init_target ();
2217 /* If dbx symbol table desired, initialize writing it and output the
2218 predefined types. */
2219 timevar_push (TV_SYMOUT);
2221 #if defined DWARF2_DEBUGGING_INFO || defined DWARF2_UNWIND_INFO
2222 if (dwarf2out_do_frame ())
2223 dwarf2out_frame_init ();
2226 /* Now we have the correct original filename, we can initialize
2228 (*debug_hooks->init) (name);
2230 timevar_pop (TV_SYMOUT);
2236 /* Reinitialize everything when target parameters, such as register usage,
2239 target_reinit (void)
2241 /* Reinitialize RTL backend. */
2242 backend_init_target ();
2244 /* Reinitialize lang-dependent parts. */
2245 lang_dependent_init_target ();
2249 dump_memory_report (bool final)
2251 ggc_print_statistics ();
2252 stringpool_statistics ();
2253 dump_tree_statistics ();
2254 dump_gimple_statistics ();
2255 dump_rtx_statistics ();
2256 dump_varray_statistics ();
2257 dump_alloc_pool_statistics ();
2258 dump_bitmap_statistics ();
2259 dump_vec_loc_statistics ();
2260 dump_ggc_loc_statistics (final);
2261 dump_alias_stats (stderr);
2262 dump_pta_stats (stderr);
2265 /* Clean up: close opened files, etc. */
2270 /* Close the dump files. */
2271 if (flag_gen_aux_info)
2273 fclose (aux_info_file);
2275 unlink (aux_info_file_name);
2278 /* Close non-debugging input and output files. Take special care to note
2279 whether fclose returns an error, since the pages might still be on the
2280 buffer chain while the file is open. */
2284 if (ferror (asm_out_file) != 0)
2285 fatal_error ("error writing to %s: %m", asm_file_name);
2286 if (fclose (asm_out_file) != 0)
2287 fatal_error ("error closing %s: %m", asm_file_name);
2291 finish_optimization_passes ();
2296 dump_memory_report (true);
2298 /* Language-specific end of compilation actions. */
2299 lang_hooks.finish ();
2302 /* Initialize the compiler, and compile the input file. */
2306 /* Initialize timing first. The C front ends read the main file in
2307 the post_options hook, and C++ does file timings. */
2308 if (time_report || !quiet_flag || flag_detailed_statistics)
2310 timevar_start (TV_TOTAL);
2314 /* Don't do any more if an error has already occurred. */
2317 /* This must be run always, because it is needed to compute the FP
2318 predefined macros, such as __LDBL_MAX__, for targets using non
2319 default FP formats. */
2320 init_adjust_machine_modes ();
2322 /* Set up the back-end if requested. */
2326 /* Language-dependent initialization. Returns true on success. */
2327 if (lang_dependent_init (main_input_filename))
2332 /* Invoke registered plugin callbacks. */
2333 invoke_plugin_callbacks (PLUGIN_FINISH_UNIT, NULL);
2336 /* Stop timing and print the times. */
2337 timevar_stop (TV_TOTAL);
2338 timevar_print (stderr);
2341 /* Entry point of cc1, cc1plus, jc1, f771, etc.
2342 Exit code is FATAL_EXIT_CODE if can't open files or if there were
2343 any errors, or SUCCESS_EXIT_CODE if compilation succeeded.
2345 It is not safe to call this function more than once. */
2348 toplev_main (int argc, char **argv)
2350 expandargv (&argc, &argv);
2352 save_argv = (const char **) argv;
2354 /* Initialization of GCC's environment, and diagnostics. */
2355 general_init (argv[0]);
2357 /* Parse the options and do minimal processing; basically just
2358 enough to default flags appropriately. */
2359 decode_options (argc, (const char **) argv);
2363 initialize_plugins ();
2366 print_version (stderr, "");
2369 print_plugins_help (stderr, "");
2371 /* Exit early if we can (e.g. -help). */
2372 if (!exit_after_options)
2375 if (warningcount || errorcount)
2376 print_ignored_options ();
2378 /* Invoke registered plugin callbacks if any. */
2379 invoke_plugin_callbacks (PLUGIN_FINISH, NULL);
2381 finalize_plugins ();
2382 if (errorcount || sorrycount)
2383 return (FATAL_EXIT_CODE);
2385 return (SUCCESS_EXIT_CODE);