PR 43564
[official-gcc/alias-decl.git] / gcc / toplev.c
bloba789383cfdc59781a43e0e1c63e9d0d3e5b61934
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, 2009, 2010
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
11 version.
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
16 for more details.
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. */
27 #include "config.h"
28 #undef FLOAT /* This is for hpux. They should change hpux. */
29 #undef FFS /* Some systems define this in param.h. */
30 #include "system.h"
31 #include "coretypes.h"
32 #include "tm.h"
33 #include <signal.h>
35 #ifdef HAVE_SYS_RESOURCE_H
36 # include <sys/resource.h>
37 #endif
39 #ifdef HAVE_SYS_TIMES_H
40 # include <sys/times.h>
41 #endif
43 #include "line-map.h"
44 #include "input.h"
45 #include "tree.h"
46 #include "version.h"
47 #include "rtl.h"
48 #include "tm_p.h"
49 #include "flags.h"
50 #include "insn-attr.h"
51 #include "insn-config.h"
52 #include "insn-flags.h"
53 #include "hard-reg-set.h"
54 #include "recog.h"
55 #include "output.h"
56 #include "except.h"
57 #include "function.h"
58 #include "toplev.h"
59 #include "expr.h"
60 #include "basic-block.h"
61 #include "intl.h"
62 #include "ggc.h"
63 #include "graph.h"
64 #include "regs.h"
65 #include "timevar.h"
66 #include "diagnostic.h"
67 #include "params.h"
68 #include "reload.h"
69 #include "ira.h"
70 #include "dwarf2asm.h"
71 #include "integrate.h"
72 #include "real.h"
73 #include "debug.h"
74 #include "target.h"
75 #include "langhooks.h"
76 #include "cfglayout.h"
77 #include "cfgloop.h"
78 #include "hosthooks.h"
79 #include "cgraph.h"
80 #include "opts.h"
81 #include "coverage.h"
82 #include "value-prof.h"
83 #include "alloc-pool.h"
84 #include "tree-mudflap.h"
85 #include "tree-pass.h"
86 #include "gimple.h"
87 #include "tree-ssa-alias.h"
88 #include "plugin.h"
90 #if defined (DWARF2_UNWIND_INFO) || defined (DWARF2_DEBUGGING_INFO)
91 #include "dwarf2out.h"
92 #endif
94 #if defined(DBX_DEBUGGING_INFO) || defined(XCOFF_DEBUGGING_INFO)
95 #include "dbxout.h"
96 #endif
98 #ifdef SDB_DEBUGGING_INFO
99 #include "sdbout.h"
100 #endif
102 #ifdef XCOFF_DEBUGGING_INFO
103 #include "xcoffout.h" /* Needed for external data
104 declarations for e.g. AIX 4.x. */
105 #endif
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. */
126 #define MAX_LINE 75
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 /* Directory used for dump output files. */
157 const char *dump_dir_name;
159 /* Name to use as a base for auxiliary output files. */
161 const char *aux_base_name;
163 /* Prefix for profile data files */
164 const char *profile_data_prefix;
166 /* A mask of target_flags that includes bit X if X was set or cleared
167 on the command line. */
169 int target_flags_explicit;
171 /* Debug hooks - dependent upon command line options. */
173 const struct gcc_debug_hooks *debug_hooks;
175 /* Debug hooks - target default. */
177 static const struct gcc_debug_hooks *default_debug_hooks;
179 /* Other flags saying which kinds of debugging dump have been requested. */
181 int rtl_dump_and_exit;
182 int flag_print_asm_name;
183 enum graph_dump_types graph_dump_format;
185 /* Name for output file of assembly code, specified with -o. */
187 const char *asm_file_name;
189 /* Nonzero means do optimizations. -O.
190 Particular numeric values stand for particular amounts of optimization;
191 thus, -O2 stores 2 here. However, the optimizations beyond the basic
192 ones are not controlled directly by this variable. Instead, they are
193 controlled by individual `flag_...' variables that are defaulted
194 based on this variable. */
196 int optimize = 0;
198 /* Nonzero means optimize for size. -Os.
199 The only valid values are zero and nonzero. When optimize_size is
200 nonzero, optimize defaults to 2, but certain individual code
201 bloating optimizations are disabled. */
203 int optimize_size = 0;
205 /* True if this is the lto front end. This is used to disable
206 gimple generation and lowering passes that are normally run on the
207 output of a front end. These passes must be bypassed for lto since
208 they have already been done before the gimple was written. */
210 bool in_lto_p = false;
212 /* Nonzero if we should write GIMPLE bytecode for link-time optimization. */
214 int flag_generate_lto;
216 /* The FUNCTION_DECL for the function currently being compiled,
217 or 0 if between functions. */
218 tree current_function_decl;
220 /* Set to the FUNC_BEGIN label of the current function, or NULL
221 if none. */
222 const char * current_function_func_begin_label;
224 /* Nonzero means to collect statistics which might be expensive
225 and to print them when we are done. */
226 int flag_detailed_statistics = 0;
228 /* A random sequence of characters, unless overridden by user. */
229 static const char *flag_random_seed;
231 /* A local time stamp derived from the time of compilation. It will be
232 zero if the system cannot provide a time. It will be -1u, if the
233 user has specified a particular random seed. */
234 unsigned local_tick;
236 /* -f flags. */
238 /* Nonzero means `char' should be signed. */
240 int flag_signed_char;
242 /* Nonzero means give an enum type only as many bytes as it needs. A value
243 of 2 means it has not yet been initialized. */
245 int flag_short_enums;
247 /* Nonzero if structures and unions should be returned in memory.
249 This should only be defined if compatibility with another compiler or
250 with an ABI is needed, because it results in slower code. */
252 #ifndef DEFAULT_PCC_STRUCT_RETURN
253 #define DEFAULT_PCC_STRUCT_RETURN 1
254 #endif
256 /* Nonzero for -fpcc-struct-return: return values the same way PCC does. */
258 int flag_pcc_struct_return = DEFAULT_PCC_STRUCT_RETURN;
260 /* 0 means straightforward implementation of complex divide acceptable.
261 1 means wide ranges of inputs must work for complex divide.
262 2 means C99-like requirements for complex multiply and divide. */
264 int flag_complex_method = 1;
266 /* Nonzero means we should be saving declaration info into a .X file. */
268 int flag_gen_aux_info = 0;
270 /* Specified name of aux-info file. */
272 const char *aux_info_file_name;
274 /* Nonzero if we are compiling code for a shared library, zero for
275 executable. */
277 int flag_shlib;
279 /* Generate code for GNU or NeXT Objective-C runtime environment. */
281 #ifdef NEXT_OBJC_RUNTIME
282 int flag_next_runtime = 1;
283 #else
284 int flag_next_runtime = 0;
285 #endif
287 /* Set to the default thread-local storage (tls) model to use. */
289 enum tls_model flag_tls_default = TLS_MODEL_GLOBAL_DYNAMIC;
291 /* Set the default region and algorithm for the integrated register
292 allocator. */
294 enum ira_algorithm flag_ira_algorithm = IRA_ALGORITHM_CB;
295 enum ira_region flag_ira_region = IRA_REGION_MIXED;
297 /* Set the default value for -fira-verbose. */
299 unsigned int flag_ira_verbose = 5;
301 /* Set the default for excess precision. */
303 enum excess_precision flag_excess_precision_cmdline = EXCESS_PRECISION_DEFAULT;
304 enum excess_precision flag_excess_precision = EXCESS_PRECISION_DEFAULT;
306 /* Nonzero means change certain warnings into errors.
307 Usually these are warnings about failure to conform to some standard. */
309 int flag_pedantic_errors = 0;
311 /* Nonzero means make permerror produce warnings instead of errors. */
313 int flag_permissive = 0;
315 /* -dA causes debug commentary information to be produced in
316 the generated assembly code (to make it more readable). This option
317 is generally only of use to those who actually need to read the
318 generated assembly code (perhaps while debugging the compiler itself).
319 Currently, this switch is only used by dwarfout.c; however, it is intended
320 to be a catchall for printing debug information in the assembler file. */
322 int flag_debug_asm = 0;
324 /* -dP causes the rtl to be emitted as a comment in assembly. */
326 int flag_dump_rtl_in_asm = 0;
328 /* When non-NULL, indicates that whenever space is allocated on the
329 stack, the resulting stack pointer must not pass this
330 address---that is, for stacks that grow downward, the stack pointer
331 must always be greater than or equal to this address; for stacks
332 that grow upward, the stack pointer must be less than this address.
333 At present, the rtx may be either a REG or a SYMBOL_REF, although
334 the support provided depends on the backend. */
335 rtx stack_limit_rtx;
337 /* Positive if we should track variables, negative if we should run
338 the var-tracking pass only to discard debug annotations, zero if
339 we're not to run it. When flag_var_tracking == AUTODETECT_VALUE it
340 will be set according to optimize, debug_info_level and debug_hooks
341 in process_options (). */
342 int flag_var_tracking = AUTODETECT_VALUE;
344 /* Positive if we should track variables at assignments, negative if
345 we should run the var-tracking pass only to discard debug
346 annotations. When flag_var_tracking_assignments ==
347 AUTODETECT_VALUE it will be set according to flag_var_tracking. */
348 int flag_var_tracking_assignments = AUTODETECT_VALUE;
350 /* Nonzero if we should toggle flag_var_tracking_assignments after
351 processing options and computing its default. */
352 int flag_var_tracking_assignments_toggle = 0;
354 /* Type of stack check. */
355 enum stack_check_type flag_stack_check = NO_STACK_CHECK;
357 /* True if the user has tagged the function with the 'section'
358 attribute. */
360 bool user_defined_section_attribute = false;
362 /* Values of the -falign-* flags: how much to align labels in code.
363 0 means `use default', 1 means `don't align'.
364 For each variable, there is an _log variant which is the power
365 of two not less than the variable, for .align output. */
367 int align_loops_log;
368 int align_loops_max_skip;
369 int align_jumps_log;
370 int align_jumps_max_skip;
371 int align_labels_log;
372 int align_labels_max_skip;
373 int align_functions_log;
375 typedef struct
377 const char *const string;
378 int *const variable;
379 const int on_value;
381 lang_independent_options;
383 /* Nonzero if subexpressions must be evaluated from left-to-right. */
384 int flag_evaluation_order = 0;
386 /* The user symbol prefix after having resolved same. */
387 const char *user_label_prefix;
389 static const param_info lang_independent_params[] = {
390 #define DEFPARAM(ENUM, OPTION, HELP, DEFAULT, MIN, MAX) \
391 { OPTION, DEFAULT, false, MIN, MAX, HELP },
392 #include "params.def"
393 #undef DEFPARAM
394 { NULL, 0, false, 0, 0, NULL }
397 /* Output files for assembler code (real compiler output)
398 and debugging dumps. */
400 FILE *asm_out_file;
401 FILE *aux_info_file;
402 FILE *dump_file = NULL;
403 const char *dump_file_name;
405 /* The current working directory of a translation. It's generally the
406 directory from which compilation was initiated, but a preprocessed
407 file may specify the original directory in which it was
408 created. */
410 static const char *src_pwd;
412 /* Initialize src_pwd with the given string, and return true. If it
413 was already initialized, return false. As a special case, it may
414 be called with a NULL argument to test whether src_pwd has NOT been
415 initialized yet. */
417 bool
418 set_src_pwd (const char *pwd)
420 if (src_pwd)
422 if (strcmp (src_pwd, pwd) == 0)
423 return true;
424 else
425 return false;
428 src_pwd = xstrdup (pwd);
429 return true;
432 /* Return the directory from which the translation unit was initiated,
433 in case set_src_pwd() was not called before to assign it a
434 different value. */
436 const char *
437 get_src_pwd (void)
439 if (! src_pwd)
441 src_pwd = getpwd ();
442 if (!src_pwd)
443 src_pwd = ".";
446 return src_pwd;
449 /* Called when the start of a function definition is parsed,
450 this function prints on stderr the name of the function. */
451 void
452 announce_function (tree decl)
454 if (!quiet_flag)
456 if (rtl_dump_and_exit)
457 fprintf (stderr, "%s ",
458 identifier_to_locale (IDENTIFIER_POINTER (DECL_NAME (decl))));
459 else
460 fprintf (stderr, " %s",
461 identifier_to_locale (lang_hooks.decl_printable_name (decl, 2)));
462 fflush (stderr);
463 pp_needs_newline (global_dc->printer) = true;
464 diagnostic_set_last_function (global_dc, (diagnostic_info *) NULL);
468 /* Initialize local_tick with the time of day, or -1 if
469 flag_random_seed is set. */
471 static void
472 init_local_tick (void)
474 if (!flag_random_seed)
476 /* Get some more or less random data. */
477 #ifdef HAVE_GETTIMEOFDAY
479 struct timeval tv;
481 gettimeofday (&tv, NULL);
482 local_tick = tv.tv_sec * 1000 + tv.tv_usec / 1000;
484 #else
486 time_t now = time (NULL);
488 if (now != (time_t)-1)
489 local_tick = (unsigned) now;
491 #endif
493 else
494 local_tick = -1;
497 /* Set up a default flag_random_seed and local_tick, unless the user
498 already specified one. Must be called after init_local_tick. */
500 static void
501 init_random_seed (void)
503 unsigned HOST_WIDE_INT value;
504 static char random_seed[HOST_BITS_PER_WIDE_INT / 4 + 3];
506 value = local_tick ^ getpid ();
508 sprintf (random_seed, HOST_WIDE_INT_PRINT_HEX, value);
509 flag_random_seed = random_seed;
512 /* Obtain the random_seed string. Unless NOINIT, initialize it if
513 it's not provided in the command line. */
515 const char *
516 get_random_seed (bool noinit)
518 if (!flag_random_seed && !noinit)
519 init_random_seed ();
520 return flag_random_seed;
523 /* Modify the random_seed string to VAL. Return its previous
524 value. */
526 const char *
527 set_random_seed (const char *val)
529 const char *old = flag_random_seed;
530 flag_random_seed = val;
531 return old;
534 /* Decode the string P as an integral parameter.
535 If the string is indeed an integer return its numeric value else
536 issue an Invalid Option error for the option PNAME and return DEFVAL.
537 If PNAME is zero just return DEFVAL, do not call error. */
540 read_integral_parameter (const char *p, const char *pname, const int defval)
542 const char *endp = p;
544 while (*endp)
546 if (ISDIGIT (*endp))
547 endp++;
548 else
549 break;
552 if (*endp != 0)
554 if (pname != 0)
555 error ("invalid option argument %qs", pname);
556 return defval;
559 return atoi (p);
562 #if GCC_VERSION < 3004
564 /* The functions floor_log2 and exact_log2 are defined as inline
565 functions in toplev.h if GCC_VERSION >= 3004. The definitions here
566 are used for older versions of gcc. */
568 /* Given X, an unsigned number, return the largest int Y such that 2**Y <= X.
569 If X is 0, return -1. */
572 floor_log2 (unsigned HOST_WIDE_INT x)
574 int t = 0;
576 if (x == 0)
577 return -1;
579 if (HOST_BITS_PER_WIDE_INT > 64)
580 if (x >= (unsigned HOST_WIDE_INT) 1 << (t + 64))
581 t += 64;
582 if (HOST_BITS_PER_WIDE_INT > 32)
583 if (x >= ((unsigned HOST_WIDE_INT) 1) << (t + 32))
584 t += 32;
585 if (x >= ((unsigned HOST_WIDE_INT) 1) << (t + 16))
586 t += 16;
587 if (x >= ((unsigned HOST_WIDE_INT) 1) << (t + 8))
588 t += 8;
589 if (x >= ((unsigned HOST_WIDE_INT) 1) << (t + 4))
590 t += 4;
591 if (x >= ((unsigned HOST_WIDE_INT) 1) << (t + 2))
592 t += 2;
593 if (x >= ((unsigned HOST_WIDE_INT) 1) << (t + 1))
594 t += 1;
596 return t;
599 /* Return the logarithm of X, base 2, considering X unsigned,
600 if X is a power of 2. Otherwise, returns -1. */
603 exact_log2 (unsigned HOST_WIDE_INT x)
605 if (x != (x & -x))
606 return -1;
607 return floor_log2 (x);
610 #endif /* GCC_VERSION < 3004 */
612 /* Handler for fatal signals, such as SIGSEGV. These are transformed
613 into ICE messages, which is much more user friendly. In case the
614 error printer crashes, reset the signal to prevent infinite recursion. */
616 static void
617 crash_signal (int signo)
619 signal (signo, SIG_DFL);
621 /* If we crashed while processing an ASM statement, then be a little more
622 graceful. It's most likely the user's fault. */
623 if (this_is_asm_operands)
625 output_operand_lossage ("unrecoverable error");
626 exit (FATAL_EXIT_CODE);
629 internal_error ("%s", strsignal (signo));
632 /* Arrange to dump core on error. (The regular error message is still
633 printed first, except in the case of abort().) */
635 static void
636 setup_core_dumping (void)
638 #ifdef SIGABRT
639 signal (SIGABRT, SIG_DFL);
640 #endif
641 #if defined(HAVE_SETRLIMIT)
643 struct rlimit rlim;
644 if (getrlimit (RLIMIT_CORE, &rlim) != 0)
645 fatal_error ("getting core file size maximum limit: %m");
646 rlim.rlim_cur = rlim.rlim_max;
647 if (setrlimit (RLIMIT_CORE, &rlim) != 0)
648 fatal_error ("setting core file size limit to maximum: %m");
650 #endif
651 diagnostic_abort_on_error (global_dc);
655 /* Strip off a legitimate source ending from the input string NAME of
656 length LEN. Rather than having to know the names used by all of
657 our front ends, we strip off an ending of a period followed by
658 up to five characters. (Java uses ".class".) */
660 void
661 strip_off_ending (char *name, int len)
663 int i;
664 for (i = 2; i < 6 && len > i; i++)
666 if (name[len - i] == '.')
668 name[len - i] = '\0';
669 break;
674 /* Output a quoted string. */
676 void
677 output_quoted_string (FILE *asm_file, const char *string)
679 #ifdef OUTPUT_QUOTED_STRING
680 OUTPUT_QUOTED_STRING (asm_file, string);
681 #else
682 char c;
684 putc ('\"', asm_file);
685 while ((c = *string++) != 0)
687 if (ISPRINT (c))
689 if (c == '\"' || c == '\\')
690 putc ('\\', asm_file);
691 putc (c, asm_file);
693 else
694 fprintf (asm_file, "\\%03o", (unsigned char) c);
696 putc ('\"', asm_file);
697 #endif
700 /* Output a file name in the form wanted by System V. */
702 void
703 output_file_directive (FILE *asm_file, const char *input_name)
705 int len;
706 const char *na;
708 if (input_name == NULL)
709 input_name = "<stdin>";
710 else
711 input_name = remap_debug_filename (input_name);
713 len = strlen (input_name);
714 na = input_name + len;
716 /* NA gets INPUT_NAME sans directory names. */
717 while (na > input_name)
719 if (IS_DIR_SEPARATOR (na[-1]))
720 break;
721 na--;
724 #ifdef ASM_OUTPUT_SOURCE_FILENAME
725 ASM_OUTPUT_SOURCE_FILENAME (asm_file, na);
726 #else
727 fprintf (asm_file, "\t.file\t");
728 output_quoted_string (asm_file, na);
729 putc ('\n', asm_file);
730 #endif
733 /* A subroutine of wrapup_global_declarations. We've come to the end of
734 the compilation unit. All deferred variables should be undeferred,
735 and all incomplete decls should be finalized. */
737 void
738 wrapup_global_declaration_1 (tree decl)
740 /* We're not deferring this any longer. Assignment is conditional to
741 avoid needlessly dirtying PCH pages. */
742 if (CODE_CONTAINS_STRUCT (TREE_CODE (decl), TS_DECL_WITH_VIS)
743 && DECL_DEFER_OUTPUT (decl) != 0)
744 DECL_DEFER_OUTPUT (decl) = 0;
746 if (TREE_CODE (decl) == VAR_DECL && DECL_SIZE (decl) == 0)
747 lang_hooks.finish_incomplete_decl (decl);
750 /* A subroutine of wrapup_global_declarations. Decide whether or not DECL
751 needs to be output. Return true if it is output. */
753 bool
754 wrapup_global_declaration_2 (tree decl)
756 if (TREE_ASM_WRITTEN (decl) || DECL_EXTERNAL (decl))
757 return false;
759 /* Don't write out static consts, unless we still need them.
761 We also keep static consts if not optimizing (for debugging),
762 unless the user specified -fno-keep-static-consts.
763 ??? They might be better written into the debug information.
764 This is possible when using DWARF.
766 A language processor that wants static constants to be always
767 written out (even if it is not used) is responsible for
768 calling rest_of_decl_compilation itself. E.g. the C front-end
769 calls rest_of_decl_compilation from finish_decl.
770 One motivation for this is that is conventional in some
771 environments to write things like:
772 static const char rcsid[] = "... version string ...";
773 intending to force the string to be in the executable.
775 A language processor that would prefer to have unneeded
776 static constants "optimized away" would just defer writing
777 them out until here. E.g. C++ does this, because static
778 constants are often defined in header files.
780 ??? A tempting alternative (for both C and C++) would be
781 to force a constant to be written if and only if it is
782 defined in a main file, as opposed to an include file. */
784 if (TREE_CODE (decl) == VAR_DECL && TREE_STATIC (decl))
786 struct varpool_node *node;
787 bool needed = true;
788 node = varpool_node (decl);
790 if (node->finalized)
791 needed = false;
792 else if (node->alias)
793 needed = false;
794 else if (!cgraph_global_info_ready
795 && (TREE_USED (decl)
796 || TREE_USED (DECL_ASSEMBLER_NAME (decl))))
797 /* needed */;
798 else if (node->needed)
799 /* needed */;
800 else if (DECL_COMDAT (decl))
801 needed = false;
802 else if (TREE_READONLY (decl) && !TREE_PUBLIC (decl)
803 && (optimize || !flag_keep_static_consts
804 || DECL_ARTIFICIAL (decl)))
805 needed = false;
807 if (needed)
809 rest_of_decl_compilation (decl, 1, 1);
810 return true;
814 return false;
817 /* Do any final processing required for the declarations in VEC, of
818 which there are LEN. We write out inline functions and variables
819 that have been deferred until this point, but which are required.
820 Returns nonzero if anything was put out. */
822 bool
823 wrapup_global_declarations (tree *vec, int len)
825 bool reconsider, output_something = false;
826 int i;
828 for (i = 0; i < len; i++)
829 wrapup_global_declaration_1 (vec[i]);
831 /* Now emit any global variables or functions that we have been
832 putting off. We need to loop in case one of the things emitted
833 here references another one which comes earlier in the list. */
836 reconsider = false;
837 for (i = 0; i < len; i++)
838 reconsider |= wrapup_global_declaration_2 (vec[i]);
839 if (reconsider)
840 output_something = true;
842 while (reconsider);
844 return output_something;
847 /* A subroutine of check_global_declarations. Issue appropriate warnings
848 for the global declaration DECL. */
850 void
851 check_global_declaration_1 (tree decl)
853 /* Warn about any function declared static but not defined. We don't
854 warn about variables, because many programs have static variables
855 that exist only to get some text into the object file. */
856 if (TREE_CODE (decl) == FUNCTION_DECL
857 && DECL_INITIAL (decl) == 0
858 && DECL_EXTERNAL (decl)
859 && ! DECL_ARTIFICIAL (decl)
860 && ! TREE_NO_WARNING (decl)
861 && ! TREE_PUBLIC (decl)
862 && (warn_unused_function
863 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl))))
865 if (TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl)))
866 pedwarn (input_location, 0, "%q+F used but never defined", decl);
867 else
868 warning (OPT_Wunused_function, "%q+F declared %<static%> but never defined", decl);
869 /* This symbol is effectively an "extern" declaration now. */
870 TREE_PUBLIC (decl) = 1;
871 assemble_external (decl);
874 /* Warn about static fns or vars defined but not used. */
875 if (((warn_unused_function && TREE_CODE (decl) == FUNCTION_DECL)
876 /* We don't warn about "static const" variables because the
877 "rcs_id" idiom uses that construction. */
878 || (warn_unused_variable
879 && TREE_CODE (decl) == VAR_DECL && ! TREE_READONLY (decl)))
880 && ! DECL_IN_SYSTEM_HEADER (decl)
881 && ! TREE_USED (decl)
882 /* The TREE_USED bit for file-scope decls is kept in the identifier,
883 to handle multiple external decls in different scopes. */
884 && ! (DECL_NAME (decl) && TREE_USED (DECL_NAME (decl)))
885 && ! DECL_EXTERNAL (decl)
886 && ! TREE_PUBLIC (decl)
887 /* A volatile variable might be used in some non-obvious way. */
888 && ! TREE_THIS_VOLATILE (decl)
889 /* Global register variables must be declared to reserve them. */
890 && ! (TREE_CODE (decl) == VAR_DECL && DECL_REGISTER (decl))
891 /* Otherwise, ask the language. */
892 && lang_hooks.decls.warn_unused_global (decl))
893 warning ((TREE_CODE (decl) == FUNCTION_DECL)
894 ? OPT_Wunused_function
895 : OPT_Wunused_variable,
896 "%q+D defined but not used", decl);
899 /* Issue appropriate warnings for the global declarations in VEC (of
900 which there are LEN). */
902 void
903 check_global_declarations (tree *vec, int len)
905 int i;
907 for (i = 0; i < len; i++)
908 check_global_declaration_1 (vec[i]);
911 /* Emit debugging information for all global declarations in VEC. */
913 void
914 emit_debug_global_declarations (tree *vec, int len)
916 int i;
918 /* Avoid confusing the debug information machinery when there are errors. */
919 if (errorcount != 0 || sorrycount != 0)
920 return;
922 timevar_push (TV_SYMOUT);
923 for (i = 0; i < len; i++)
924 debug_hooks->global_decl (vec[i]);
925 timevar_pop (TV_SYMOUT);
928 /* Warn about a use of an identifier which was marked deprecated. */
929 void
930 warn_deprecated_use (tree node, tree attr)
932 const char *msg;
934 if (node == 0 || !warn_deprecated_decl)
935 return;
937 if (!attr)
939 if (DECL_P (node))
940 attr = DECL_ATTRIBUTES (node);
941 else if (TYPE_P (node))
943 tree decl = TYPE_STUB_DECL (node);
944 if (decl)
945 attr = lookup_attribute ("deprecated",
946 TYPE_ATTRIBUTES (TREE_TYPE (decl)));
950 if (attr)
951 attr = lookup_attribute ("deprecated", attr);
953 if (attr)
954 msg = TREE_STRING_POINTER (TREE_VALUE (TREE_VALUE (attr)));
955 else
956 msg = NULL;
958 if (DECL_P (node))
960 expanded_location xloc = expand_location (DECL_SOURCE_LOCATION (node));
961 if (msg)
962 warning (OPT_Wdeprecated_declarations,
963 "%qD is deprecated (declared at %s:%d): %s",
964 node, xloc.file, xloc.line, msg);
965 else
966 warning (OPT_Wdeprecated_declarations,
967 "%qD is deprecated (declared at %s:%d)",
968 node, xloc.file, xloc.line);
970 else if (TYPE_P (node))
972 tree what = NULL_TREE;
973 tree decl = TYPE_STUB_DECL (node);
975 if (TYPE_NAME (node))
977 if (TREE_CODE (TYPE_NAME (node)) == IDENTIFIER_NODE)
978 what = TYPE_NAME (node);
979 else if (TREE_CODE (TYPE_NAME (node)) == TYPE_DECL
980 && DECL_NAME (TYPE_NAME (node)))
981 what = DECL_NAME (TYPE_NAME (node));
984 if (decl)
986 expanded_location xloc
987 = expand_location (DECL_SOURCE_LOCATION (decl));
988 if (what)
990 if (msg)
991 warning (OPT_Wdeprecated_declarations,
992 "%qE is deprecated (declared at %s:%d): %s",
993 what, xloc.file, xloc.line, msg);
994 else
995 warning (OPT_Wdeprecated_declarations,
996 "%qE is deprecated (declared at %s:%d)", what,
997 xloc.file, xloc.line);
999 else
1001 if (msg)
1002 warning (OPT_Wdeprecated_declarations,
1003 "type is deprecated (declared at %s:%d): %s",
1004 xloc.file, xloc.line, msg);
1005 else
1006 warning (OPT_Wdeprecated_declarations,
1007 "type is deprecated (declared at %s:%d)",
1008 xloc.file, xloc.line);
1011 else
1013 if (what)
1015 if (msg)
1016 warning (OPT_Wdeprecated_declarations, "%qE is deprecated: %s",
1017 what, msg);
1018 else
1019 warning (OPT_Wdeprecated_declarations, "%qE is deprecated", what);
1021 else
1023 if (msg)
1024 warning (OPT_Wdeprecated_declarations, "type is deprecated: %s",
1025 msg);
1026 else
1027 warning (OPT_Wdeprecated_declarations, "type is deprecated");
1033 /* Compile an entire translation unit. Write a file of assembly
1034 output and various debugging dumps. */
1036 static void
1037 compile_file (void)
1039 /* Initialize yet another pass. */
1041 ggc_protect_identifiers = true;
1043 init_cgraph ();
1044 init_final (main_input_filename);
1045 coverage_init (aux_base_name);
1046 statistics_init ();
1047 invoke_plugin_callbacks (PLUGIN_START_UNIT, NULL);
1049 timevar_push (TV_PARSE);
1051 /* Call the parser, which parses the entire file (calling
1052 rest_of_compilation for each function). */
1053 lang_hooks.parse_file (set_yydebug);
1055 /* Compilation is now finished except for writing
1056 what's left of the symbol table output. */
1057 timevar_pop (TV_PARSE);
1059 if (flag_syntax_only)
1060 return;
1062 ggc_protect_identifiers = false;
1064 /* This must also call cgraph_finalize_compilation_unit. */
1065 lang_hooks.decls.final_write_globals ();
1067 if (errorcount || sorrycount)
1068 return;
1070 varpool_assemble_pending_decls ();
1071 finish_aliases_2 ();
1073 /* Likewise for mudflap static object registrations. */
1074 if (flag_mudflap)
1075 mudflap_finish_file ();
1077 /* Likewise for emulated thread-local storage. */
1078 if (!targetm.have_tls)
1079 emutls_finish ();
1081 output_shared_constant_pool ();
1082 output_object_blocks ();
1084 /* Write out any pending weak symbol declarations. */
1085 weak_finish ();
1087 /* This must be at the end before unwind and debug info.
1088 Some target ports emit PIC setup thunks here. */
1089 targetm.asm_out.code_end ();
1091 /* Do dbx symbols. */
1092 timevar_push (TV_SYMOUT);
1094 #if defined DWARF2_DEBUGGING_INFO || defined DWARF2_UNWIND_INFO
1095 if (dwarf2out_do_frame ())
1096 dwarf2out_frame_finish ();
1097 #endif
1099 (*debug_hooks->finish) (main_input_filename);
1100 timevar_pop (TV_SYMOUT);
1102 /* Output some stuff at end of file if nec. */
1104 dw2_output_indirect_constants ();
1106 /* Flush any pending external directives. */
1107 process_pending_assemble_externals ();
1109 /* Emit LTO marker if LTO info has been previously emitted. This is
1110 used by collect2 to determine whether an object file contains IL.
1111 We used to emit an undefined reference here, but this produces
1112 link errors if an object file with IL is stored into a shared
1113 library without invoking lto1. */
1114 if (flag_generate_lto)
1116 #if defined ASM_OUTPUT_ALIGNED_DECL_COMMON
1117 ASM_OUTPUT_ALIGNED_DECL_COMMON (asm_out_file, NULL_TREE,
1118 "__gnu_lto_v1",
1119 (unsigned HOST_WIDE_INT) 1, 8);
1120 #elif defined ASM_OUTPUT_ALIGNED_COMMON
1121 ASM_OUTPUT_ALIGNED_COMMON (asm_out_file, "__gnu_lto_v1",
1122 (unsigned HOST_WIDE_INT) 1, 8);
1123 #else
1124 ASM_OUTPUT_COMMON (asm_out_file, "__gnu_lto_v1",
1125 (unsigned HOST_WIDE_INT) 1,
1126 (unsigned HOST_WIDE_INT) 1);
1127 #endif
1130 /* Attach a special .ident directive to the end of the file to identify
1131 the version of GCC which compiled this code. The format of the .ident
1132 string is patterned after the ones produced by native SVR4 compilers. */
1133 #ifdef IDENT_ASM_OP
1134 if (!flag_no_ident)
1136 const char *pkg_version = "(GNU) ";
1138 if (strcmp ("(GCC) ", pkgversion_string))
1139 pkg_version = pkgversion_string;
1140 fprintf (asm_out_file, "%s\"GCC: %s%s\"\n",
1141 IDENT_ASM_OP, pkg_version, version_string);
1143 #endif
1145 /* Invoke registered plugin callbacks. */
1146 invoke_plugin_callbacks (PLUGIN_FINISH_UNIT, NULL);
1148 /* This must be at the end. Some target ports emit end of file directives
1149 into the assembly file here, and hence we can not output anything to the
1150 assembly file after this point. */
1151 targetm.asm_out.file_end ();
1154 /* Parse a -d... command line switch. */
1156 void
1157 decode_d_option (const char *arg)
1159 int c;
1161 while (*arg)
1162 switch (c = *arg++)
1164 case 'A':
1165 flag_debug_asm = 1;
1166 break;
1167 case 'p':
1168 flag_print_asm_name = 1;
1169 break;
1170 case 'P':
1171 flag_dump_rtl_in_asm = 1;
1172 flag_print_asm_name = 1;
1173 break;
1174 case 'v':
1175 graph_dump_format = vcg;
1176 break;
1177 case 'x':
1178 rtl_dump_and_exit = 1;
1179 break;
1180 case 'y':
1181 set_yydebug = 1;
1182 break;
1183 case 'D': /* These are handled by the preprocessor. */
1184 case 'I':
1185 case 'M':
1186 case 'N':
1187 case 'U':
1188 break;
1189 case 'H':
1190 setup_core_dumping();
1191 break;
1192 case 'a':
1193 enable_rtl_dump_file ();
1194 break;
1196 default:
1197 warning (0, "unrecognized gcc debugging option: %c", c);
1198 break;
1202 /* Indexed by enum debug_info_type. */
1203 const char *const debug_type_names[] =
1205 "none", "stabs", "coff", "dwarf-2", "xcoff", "vms"
1208 /* Print version information to FILE.
1209 Each line begins with INDENT (for the case where FILE is the
1210 assembler output file). */
1212 void
1213 print_version (FILE *file, const char *indent)
1215 static const char fmt1[] =
1216 #ifdef __GNUC__
1217 N_("%s%s%s %sversion %s (%s)\n%s\tcompiled by GNU C version %s, ")
1218 #else
1219 N_("%s%s%s %sversion %s (%s) compiled by CC, ")
1220 #endif
1222 static const char fmt2[] =
1223 N_("GMP version %s, MPFR version %s, MPC version %s\n");
1224 static const char fmt3[] =
1225 N_("%s%swarning: %s header version %s differs from library version %s.\n");
1226 static const char fmt4[] =
1227 N_("%s%sGGC heuristics: --param ggc-min-expand=%d --param ggc-min-heapsize=%d\n");
1228 #ifndef __VERSION__
1229 #define __VERSION__ "[?]"
1230 #endif
1231 fprintf (file,
1232 file == stderr ? _(fmt1) : fmt1,
1233 indent, *indent != 0 ? " " : "",
1234 lang_hooks.name, pkgversion_string, version_string, TARGET_NAME,
1235 indent, __VERSION__);
1237 /* We need to stringify the GMP macro values. Ugh, gmp_version has
1238 two string formats, "i.j.k" and "i.j" when k is zero. As of
1239 gmp-4.3.0, GMP always uses the 3 number format. */
1240 #define GCC_GMP_STRINGIFY_VERSION3(X) #X
1241 #define GCC_GMP_STRINGIFY_VERSION2(X) GCC_GMP_STRINGIFY_VERSION3(X)
1242 #define GCC_GMP_VERSION_NUM(X,Y,Z) (((X) << 16L) | ((Y) << 8) | (Z))
1243 #define GCC_GMP_VERSION \
1244 GCC_GMP_VERSION_NUM(__GNU_MP_VERSION, __GNU_MP_VERSION_MINOR, __GNU_MP_VERSION_PATCHLEVEL)
1245 #if GCC_GMP_VERSION < GCC_GMP_VERSION_NUM(4,3,0) && __GNU_MP_VERSION_PATCHLEVEL == 0
1246 #define GCC_GMP_STRINGIFY_VERSION GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION) "." \
1247 GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION_MINOR)
1248 #else
1249 #define GCC_GMP_STRINGIFY_VERSION GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION) "." \
1250 GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION_MINOR) "." \
1251 GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION_PATCHLEVEL)
1252 #endif
1253 fprintf (file,
1254 file == stderr ? _(fmt2) : fmt2,
1255 GCC_GMP_STRINGIFY_VERSION, MPFR_VERSION_STRING, MPC_VERSION_STRING);
1256 if (strcmp (GCC_GMP_STRINGIFY_VERSION, gmp_version))
1257 fprintf (file,
1258 file == stderr ? _(fmt3) : fmt3,
1259 indent, *indent != 0 ? " " : "",
1260 "GMP", GCC_GMP_STRINGIFY_VERSION, gmp_version);
1261 if (strcmp (MPFR_VERSION_STRING, mpfr_get_version ()))
1262 fprintf (file,
1263 file == stderr ? _(fmt3) : fmt3,
1264 indent, *indent != 0 ? " " : "",
1265 "MPFR", MPFR_VERSION_STRING, mpfr_get_version ());
1266 if (strcmp (MPC_VERSION_STRING, mpc_get_version ()))
1267 fprintf (file,
1268 file == stderr ? _(fmt3) : fmt3,
1269 indent, *indent != 0 ? " " : "",
1270 "MPC", MPC_VERSION_STRING, mpc_get_version ());
1271 fprintf (file,
1272 file == stderr ? _(fmt4) : fmt4,
1273 indent, *indent != 0 ? " " : "",
1274 PARAM_VALUE (GGC_MIN_EXPAND), PARAM_VALUE (GGC_MIN_HEAPSIZE));
1276 print_plugins_versions (file, indent);
1279 #ifdef ASM_COMMENT_START
1280 static int
1281 print_to_asm_out_file (print_switch_type type, const char * text)
1283 bool prepend_sep = true;
1285 switch (type)
1287 case SWITCH_TYPE_LINE_END:
1288 putc ('\n', asm_out_file);
1289 return 1;
1291 case SWITCH_TYPE_LINE_START:
1292 fputs (ASM_COMMENT_START, asm_out_file);
1293 return strlen (ASM_COMMENT_START);
1295 case SWITCH_TYPE_DESCRIPTIVE:
1296 if (ASM_COMMENT_START[0] == 0)
1297 prepend_sep = false;
1298 /* Drop through. */
1299 case SWITCH_TYPE_PASSED:
1300 case SWITCH_TYPE_ENABLED:
1301 if (prepend_sep)
1302 fputc (' ', asm_out_file);
1303 fputs (text, asm_out_file);
1304 /* No need to return the length here as
1305 print_single_switch has already done it. */
1306 return 0;
1308 default:
1309 return -1;
1312 #endif
1314 static int
1315 print_to_stderr (print_switch_type type, const char * text)
1317 switch (type)
1319 case SWITCH_TYPE_LINE_END:
1320 putc ('\n', stderr);
1321 return 1;
1323 case SWITCH_TYPE_LINE_START:
1324 return 0;
1326 case SWITCH_TYPE_PASSED:
1327 case SWITCH_TYPE_ENABLED:
1328 fputc (' ', stderr);
1329 /* Drop through. */
1331 case SWITCH_TYPE_DESCRIPTIVE:
1332 fputs (text, stderr);
1333 /* No need to return the length here as
1334 print_single_switch has already done it. */
1335 return 0;
1337 default:
1338 return -1;
1342 /* Print an option value and return the adjusted position in the line.
1343 ??? print_fn doesn't handle errors, eg disk full; presumably other
1344 code will catch a disk full though. */
1346 static int
1347 print_single_switch (print_switch_fn_type print_fn,
1348 int pos,
1349 print_switch_type type,
1350 const char * text)
1352 /* The ultrix fprintf returns 0 on success, so compute the result
1353 we want here since we need it for the following test. The +1
1354 is for the separator character that will probably be emitted. */
1355 int len = strlen (text) + 1;
1357 if (pos != 0
1358 && pos + len > MAX_LINE)
1360 print_fn (SWITCH_TYPE_LINE_END, NULL);
1361 pos = 0;
1364 if (pos == 0)
1365 pos += print_fn (SWITCH_TYPE_LINE_START, NULL);
1367 print_fn (type, text);
1368 return pos + len;
1371 /* Print active target switches using PRINT_FN.
1372 POS is the current cursor position and MAX is the size of a "line".
1373 Each line begins with INDENT and ends with TERM.
1374 Each switch is separated from the next by SEP. */
1376 static void
1377 print_switch_values (print_switch_fn_type print_fn)
1379 int pos = 0;
1380 size_t j;
1381 const char **p;
1383 /* Fill in the -frandom-seed option, if the user didn't pass it, so
1384 that it can be printed below. This helps reproducibility. */
1385 if (!flag_random_seed)
1386 init_random_seed ();
1388 /* Print the options as passed. */
1389 pos = print_single_switch (print_fn, pos,
1390 SWITCH_TYPE_DESCRIPTIVE, _("options passed: "));
1392 for (p = &save_argv[1]; *p != NULL; p++)
1394 if (**p == '-')
1396 /* Ignore these. */
1397 if (strcmp (*p, "-o") == 0
1398 || strcmp (*p, "-dumpbase") == 0
1399 || strcmp (*p, "-dumpdir") == 0
1400 || strcmp (*p, "-auxbase") == 0)
1402 if (p[1] != NULL)
1403 p++;
1404 continue;
1407 if (strcmp (*p, "-quiet") == 0
1408 || strcmp (*p, "-version") == 0)
1409 continue;
1411 if ((*p)[1] == 'd')
1412 continue;
1415 pos = print_single_switch (print_fn, pos, SWITCH_TYPE_PASSED, *p);
1418 if (pos > 0)
1419 print_fn (SWITCH_TYPE_LINE_END, NULL);
1421 /* Print the -f and -m options that have been enabled.
1422 We don't handle language specific options but printing argv
1423 should suffice. */
1424 pos = print_single_switch (print_fn, 0,
1425 SWITCH_TYPE_DESCRIPTIVE, _("options enabled: "));
1427 for (j = 0; j < cl_options_count; j++)
1428 if ((cl_options[j].flags & CL_REPORT)
1429 && option_enabled (j) > 0)
1430 pos = print_single_switch (print_fn, pos,
1431 SWITCH_TYPE_ENABLED, cl_options[j].opt_text);
1433 print_fn (SWITCH_TYPE_LINE_END, NULL);
1436 /* Open assembly code output file. Do this even if -fsyntax-only is
1437 on, because then the driver will have provided the name of a
1438 temporary file or bit bucket for us. NAME is the file specified on
1439 the command line, possibly NULL. */
1440 static void
1441 init_asm_output (const char *name)
1443 if (name == NULL && asm_file_name == 0)
1444 asm_out_file = stdout;
1445 else
1447 if (asm_file_name == 0)
1449 int len = strlen (dump_base_name);
1450 char *dumpname = XNEWVEC (char, len + 6);
1452 memcpy (dumpname, dump_base_name, len + 1);
1453 strip_off_ending (dumpname, len);
1454 strcat (dumpname, ".s");
1455 asm_file_name = dumpname;
1457 if (!strcmp (asm_file_name, "-"))
1458 asm_out_file = stdout;
1459 else
1460 asm_out_file = fopen (asm_file_name, "w+b");
1461 if (asm_out_file == 0)
1462 fatal_error ("can%'t open %s for writing: %m", asm_file_name);
1465 if (!flag_syntax_only)
1467 targetm.asm_out.file_start ();
1469 if (flag_record_gcc_switches)
1471 if (targetm.asm_out.record_gcc_switches)
1473 /* Let the target know that we are about to start recording. */
1474 targetm.asm_out.record_gcc_switches (SWITCH_TYPE_DESCRIPTIVE,
1475 NULL);
1476 /* Now record the switches. */
1477 print_switch_values (targetm.asm_out.record_gcc_switches);
1478 /* Let the target know that the recording is over. */
1479 targetm.asm_out.record_gcc_switches (SWITCH_TYPE_DESCRIPTIVE,
1480 NULL);
1482 else
1483 inform (input_location, "-frecord-gcc-switches is not supported by the current target");
1486 #ifdef ASM_COMMENT_START
1487 if (flag_verbose_asm)
1489 /* Print the list of switches in effect
1490 into the assembler file as comments. */
1491 print_version (asm_out_file, ASM_COMMENT_START);
1492 print_switch_values (print_to_asm_out_file);
1493 putc ('\n', asm_out_file);
1495 #endif
1499 /* Return true if the state of option OPTION should be stored in PCH files
1500 and checked by default_pch_valid_p. Store the option's current state
1501 in STATE if so. */
1503 static inline bool
1504 option_affects_pch_p (int option, struct cl_option_state *state)
1506 if ((cl_options[option].flags & CL_TARGET) == 0)
1507 return false;
1508 if (cl_options[option].flag_var == &target_flags)
1509 if (targetm.check_pch_target_flags)
1510 return false;
1511 return get_option_state (option, state);
1514 /* Default version of get_pch_validity.
1515 By default, every flag difference is fatal; that will be mostly right for
1516 most targets, but completely right for very few. */
1518 void *
1519 default_get_pch_validity (size_t *sz)
1521 struct cl_option_state state;
1522 size_t i;
1523 char *result, *r;
1525 *sz = 2;
1526 if (targetm.check_pch_target_flags)
1527 *sz += sizeof (target_flags);
1528 for (i = 0; i < cl_options_count; i++)
1529 if (option_affects_pch_p (i, &state))
1530 *sz += state.size;
1532 result = r = XNEWVEC (char, *sz);
1533 r[0] = flag_pic;
1534 r[1] = flag_pie;
1535 r += 2;
1536 if (targetm.check_pch_target_flags)
1538 memcpy (r, &target_flags, sizeof (target_flags));
1539 r += sizeof (target_flags);
1542 for (i = 0; i < cl_options_count; i++)
1543 if (option_affects_pch_p (i, &state))
1545 memcpy (r, state.data, state.size);
1546 r += state.size;
1549 return result;
1552 /* Return a message which says that a PCH file was created with a different
1553 setting of OPTION. */
1555 static const char *
1556 pch_option_mismatch (const char *option)
1558 char *r;
1560 asprintf (&r, _("created and used with differing settings of '%s'"), option);
1561 if (r == NULL)
1562 return _("out of memory");
1563 return r;
1566 /* Default version of pch_valid_p. */
1568 const char *
1569 default_pch_valid_p (const void *data_p, size_t len)
1571 struct cl_option_state state;
1572 const char *data = (const char *)data_p;
1573 size_t i;
1575 /* -fpic and -fpie also usually make a PCH invalid. */
1576 if (data[0] != flag_pic)
1577 return _("created and used with different settings of -fpic");
1578 if (data[1] != flag_pie)
1579 return _("created and used with different settings of -fpie");
1580 data += 2;
1582 /* Check target_flags. */
1583 if (targetm.check_pch_target_flags)
1585 int tf;
1586 const char *r;
1588 memcpy (&tf, data, sizeof (target_flags));
1589 data += sizeof (target_flags);
1590 len -= sizeof (target_flags);
1591 r = targetm.check_pch_target_flags (tf);
1592 if (r != NULL)
1593 return r;
1596 for (i = 0; i < cl_options_count; i++)
1597 if (option_affects_pch_p (i, &state))
1599 if (memcmp (data, state.data, state.size) != 0)
1600 return pch_option_mismatch (cl_options[i].opt_text);
1601 data += state.size;
1602 len -= state.size;
1605 return NULL;
1608 /* Default tree printer. Handles declarations only. */
1609 bool
1610 default_tree_printer (pretty_printer *pp, text_info *text, const char *spec,
1611 int precision, bool wide, bool set_locus, bool hash)
1613 tree t;
1615 /* FUTURE: %+x should set the locus. */
1616 if (precision != 0 || wide || hash)
1617 return false;
1619 switch (*spec)
1621 case 'E':
1622 t = va_arg (*text->args_ptr, tree);
1623 if (TREE_CODE (t) == IDENTIFIER_NODE)
1625 pp_identifier (pp, IDENTIFIER_POINTER (t));
1626 return true;
1628 break;
1630 case 'D':
1631 t = va_arg (*text->args_ptr, tree);
1632 if (DECL_DEBUG_EXPR_IS_FROM (t) && DECL_DEBUG_EXPR (t))
1633 t = DECL_DEBUG_EXPR (t);
1634 break;
1636 case 'F':
1637 case 'T':
1638 t = va_arg (*text->args_ptr, tree);
1639 break;
1641 default:
1642 return false;
1645 if (set_locus && text->locus)
1646 *text->locus = DECL_SOURCE_LOCATION (t);
1648 if (DECL_P (t))
1650 const char *n = DECL_NAME (t)
1651 ? identifier_to_locale (lang_hooks.decl_printable_name (t, 2))
1652 : _("<anonymous>");
1653 pp_string (pp, n);
1655 else
1656 dump_generic_node (pp, t, 0, TDF_DIAGNOSTIC, 0);
1658 return true;
1661 /* A helper function; used as the reallocator function for cpp's line
1662 table. */
1663 static void *
1664 realloc_for_line_map (void *ptr, size_t len)
1666 return ggc_realloc (ptr, len);
1669 /* Initialization of the front end environment, before command line
1670 options are parsed. Signal handlers, internationalization etc.
1671 ARGV0 is main's argv[0]. */
1672 static void
1673 general_init (const char *argv0)
1675 const char *p;
1677 p = argv0 + strlen (argv0);
1678 while (p != argv0 && !IS_DIR_SEPARATOR (p[-1]))
1679 --p;
1680 progname = p;
1682 xmalloc_set_program_name (progname);
1684 hex_init ();
1686 /* Unlock the stdio streams. */
1687 unlock_std_streams ();
1689 gcc_init_libintl ();
1691 /* Initialize the diagnostics reporting machinery, so option parsing
1692 can give warnings and errors. */
1693 diagnostic_initialize (global_dc);
1694 /* Set a default printer. Language specific initializations will
1695 override it later. */
1696 pp_format_decoder (global_dc->printer) = &default_tree_printer;
1698 /* Trap fatal signals, e.g. SIGSEGV, and convert them to ICE messages. */
1699 #ifdef SIGSEGV
1700 signal (SIGSEGV, crash_signal);
1701 #endif
1702 #ifdef SIGILL
1703 signal (SIGILL, crash_signal);
1704 #endif
1705 #ifdef SIGBUS
1706 signal (SIGBUS, crash_signal);
1707 #endif
1708 #ifdef SIGABRT
1709 signal (SIGABRT, crash_signal);
1710 #endif
1711 #if defined SIGIOT && (!defined SIGABRT || SIGABRT != SIGIOT)
1712 signal (SIGIOT, crash_signal);
1713 #endif
1714 #ifdef SIGFPE
1715 signal (SIGFPE, crash_signal);
1716 #endif
1718 /* Other host-specific signal setup. */
1719 (*host_hooks.extra_signals)();
1721 /* Initialize the garbage-collector, string pools and tree type hash
1722 table. */
1723 init_ggc ();
1724 init_stringpool ();
1725 line_table = GGC_NEW (struct line_maps);
1726 linemap_init (line_table);
1727 line_table->reallocator = realloc_for_line_map;
1728 init_ttree ();
1730 /* Initialize register usage now so switches may override. */
1731 init_reg_sets ();
1733 /* Register the language-independent parameters. */
1734 add_params (lang_independent_params, LAST_PARAM);
1736 /* This must be done after add_params but before argument processing. */
1737 init_ggc_heuristics();
1738 init_optimization_passes ();
1739 statistics_early_init ();
1742 /* Return true if the current target supports -fsection-anchors. */
1744 static bool
1745 target_supports_section_anchors_p (void)
1747 if (targetm.min_anchor_offset == 0 && targetm.max_anchor_offset == 0)
1748 return false;
1750 if (targetm.asm_out.output_anchor == NULL)
1751 return false;
1753 return true;
1756 /* Default the align_* variables to 1 if they're still unset, and
1757 set up the align_*_log variables. */
1758 static void
1759 init_alignments (void)
1761 if (align_loops <= 0)
1762 align_loops = 1;
1763 if (align_loops_max_skip > align_loops)
1764 align_loops_max_skip = align_loops - 1;
1765 align_loops_log = floor_log2 (align_loops * 2 - 1);
1766 if (align_jumps <= 0)
1767 align_jumps = 1;
1768 if (align_jumps_max_skip > align_jumps)
1769 align_jumps_max_skip = align_jumps - 1;
1770 align_jumps_log = floor_log2 (align_jumps * 2 - 1);
1771 if (align_labels <= 0)
1772 align_labels = 1;
1773 align_labels_log = floor_log2 (align_labels * 2 - 1);
1774 if (align_labels_max_skip > align_labels)
1775 align_labels_max_skip = align_labels - 1;
1776 if (align_functions <= 0)
1777 align_functions = 1;
1778 align_functions_log = floor_log2 (align_functions * 2 - 1);
1781 /* Process the options that have been parsed. */
1782 static void
1783 process_options (void)
1785 /* Just in case lang_hooks.post_options ends up calling a debug_hook.
1786 This can happen with incorrect pre-processed input. */
1787 debug_hooks = &do_nothing_debug_hooks;
1789 /* This replaces set_Wunused. */
1790 if (warn_unused_function == -1)
1791 warn_unused_function = warn_unused;
1792 if (warn_unused_label == -1)
1793 warn_unused_label = warn_unused;
1794 /* Wunused-parameter is enabled if both -Wunused -Wextra are enabled. */
1795 if (warn_unused_parameter == -1)
1796 warn_unused_parameter = (warn_unused && extra_warnings);
1797 if (warn_unused_variable == -1)
1798 warn_unused_variable = warn_unused;
1799 if (warn_unused_value == -1)
1800 warn_unused_value = warn_unused;
1802 /* This replaces set_Wextra. */
1803 if (warn_uninitialized == -1)
1804 warn_uninitialized = extra_warnings;
1806 /* Allow the front end to perform consistency checks and do further
1807 initialization based on the command line options. This hook also
1808 sets the original filename if appropriate (e.g. foo.i -> foo.c)
1809 so we can correctly initialize debug output. */
1810 no_backend = lang_hooks.post_options (&main_input_filename);
1812 #ifdef OVERRIDE_OPTIONS
1813 /* Some machines may reject certain combinations of options. */
1814 OVERRIDE_OPTIONS;
1815 #endif
1817 /* Avoid any informative notes in the second run of -fcompare-debug. */
1818 if (flag_compare_debug)
1819 diagnostic_inhibit_notes (global_dc);
1821 if (flag_section_anchors && !target_supports_section_anchors_p ())
1823 warning (OPT_fsection_anchors,
1824 "this target does not support %qs", "-fsection-anchors");
1825 flag_section_anchors = 0;
1828 if (flag_short_enums == 2)
1829 flag_short_enums = targetm.default_short_enums ();
1831 /* Set aux_base_name if not already set. */
1832 if (aux_base_name)
1834 else if (main_input_filename)
1836 char *name = xstrdup (lbasename (main_input_filename));
1838 strip_off_ending (name, strlen (name));
1839 aux_base_name = name;
1841 else
1842 aux_base_name = "gccaux";
1844 #ifndef HAVE_cloog
1845 if (flag_graphite
1846 || flag_loop_block
1847 || flag_loop_interchange
1848 || flag_loop_strip_mine
1849 || flag_graphite_identity
1850 || flag_loop_parallelize_all)
1851 sorry ("Graphite loop optimizations cannot be used");
1852 #endif
1854 /* Unrolling all loops implies that standard loop unrolling must also
1855 be done. */
1856 if (flag_unroll_all_loops)
1857 flag_unroll_loops = 1;
1859 /* The loop unrolling code assumes that cse will be run after loop.
1860 web and rename-registers also help when run after loop unrolling. */
1861 if (flag_rerun_cse_after_loop == AUTODETECT_VALUE)
1862 flag_rerun_cse_after_loop = flag_unroll_loops || flag_peel_loops;
1864 if (flag_web == AUTODETECT_VALUE)
1865 flag_web = flag_unroll_loops || flag_peel_loops;
1867 if (flag_rename_registers == AUTODETECT_VALUE)
1868 flag_rename_registers = flag_unroll_loops || flag_peel_loops;
1870 if (flag_non_call_exceptions)
1871 flag_asynchronous_unwind_tables = 1;
1872 if (flag_asynchronous_unwind_tables)
1873 flag_unwind_tables = 1;
1875 if (flag_value_profile_transformations)
1876 flag_profile_values = 1;
1878 /* Warn about options that are not supported on this machine. */
1879 #ifndef INSN_SCHEDULING
1880 if (flag_schedule_insns || flag_schedule_insns_after_reload)
1881 warning (0, "instruction scheduling not supported on this target machine");
1882 #endif
1883 #ifndef DELAY_SLOTS
1884 if (flag_delayed_branch)
1885 warning (0, "this target machine does not have delayed branches");
1886 #endif
1888 user_label_prefix = USER_LABEL_PREFIX;
1889 if (flag_leading_underscore != -1)
1891 /* If the default prefix is more complicated than "" or "_",
1892 issue a warning and ignore this option. */
1893 if (user_label_prefix[0] == 0 ||
1894 (user_label_prefix[0] == '_' && user_label_prefix[1] == 0))
1896 user_label_prefix = flag_leading_underscore ? "_" : "";
1898 else
1899 warning (0, "-f%sleading-underscore not supported on this target machine",
1900 flag_leading_underscore ? "" : "no-");
1903 /* If we are in verbose mode, write out the version and maybe all the
1904 option flags in use. */
1905 if (version_flag)
1907 print_version (stderr, "");
1908 if (! quiet_flag)
1909 print_switch_values (print_to_stderr);
1912 if (flag_syntax_only)
1914 write_symbols = NO_DEBUG;
1915 profile_flag = 0;
1918 if (flag_gtoggle)
1920 if (debug_info_level == DINFO_LEVEL_NONE)
1922 debug_info_level = DINFO_LEVEL_NORMAL;
1924 if (write_symbols == NO_DEBUG)
1925 write_symbols = PREFERRED_DEBUGGING_TYPE;
1927 else
1928 debug_info_level = DINFO_LEVEL_NONE;
1931 if (flag_dump_final_insns && !flag_syntax_only && !no_backend)
1933 FILE *final_output = fopen (flag_dump_final_insns, "w");
1934 if (!final_output)
1936 error ("could not open final insn dump file %qs: %s",
1937 flag_dump_final_insns, strerror (errno));
1938 flag_dump_final_insns = NULL;
1940 else if (fclose (final_output))
1942 error ("could not close zeroed insn dump file %qs: %s",
1943 flag_dump_final_insns, strerror (errno));
1944 flag_dump_final_insns = NULL;
1948 /* Unless over-ridden for the target, assume that all DWARF levels
1949 may be emitted, if DWARF2_DEBUG is selected. */
1950 if (dwarf_strict < 0)
1951 dwarf_strict = 0;
1953 /* A lot of code assumes write_symbols == NO_DEBUG if the debugging
1954 level is 0. */
1955 if (debug_info_level == DINFO_LEVEL_NONE)
1956 write_symbols = NO_DEBUG;
1958 /* Now we know write_symbols, set up the debug hooks based on it.
1959 By default we do nothing for debug output. */
1960 if (PREFERRED_DEBUGGING_TYPE == NO_DEBUG)
1961 default_debug_hooks = &do_nothing_debug_hooks;
1962 #if defined(DBX_DEBUGGING_INFO)
1963 else if (PREFERRED_DEBUGGING_TYPE == DBX_DEBUG)
1964 default_debug_hooks = &dbx_debug_hooks;
1965 #endif
1966 #if defined(XCOFF_DEBUGGING_INFO)
1967 else if (PREFERRED_DEBUGGING_TYPE == XCOFF_DEBUG)
1968 default_debug_hooks = &xcoff_debug_hooks;
1969 #endif
1970 #ifdef SDB_DEBUGGING_INFO
1971 else if (PREFERRED_DEBUGGING_TYPE == SDB_DEBUG)
1972 default_debug_hooks = &sdb_debug_hooks;
1973 #endif
1974 #ifdef DWARF2_DEBUGGING_INFO
1975 else if (PREFERRED_DEBUGGING_TYPE == DWARF2_DEBUG)
1976 default_debug_hooks = &dwarf2_debug_hooks;
1977 #endif
1978 #ifdef VMS_DEBUGGING_INFO
1979 else if (PREFERRED_DEBUGGING_TYPE == VMS_DEBUG
1980 || PREFERRED_DEBUGGING_TYPE == VMS_AND_DWARF2_DEBUG)
1981 default_debug_hooks = &vmsdbg_debug_hooks;
1982 #endif
1984 if (write_symbols == NO_DEBUG)
1986 #if defined(DBX_DEBUGGING_INFO)
1987 else if (write_symbols == DBX_DEBUG)
1988 debug_hooks = &dbx_debug_hooks;
1989 #endif
1990 #if defined(XCOFF_DEBUGGING_INFO)
1991 else if (write_symbols == XCOFF_DEBUG)
1992 debug_hooks = &xcoff_debug_hooks;
1993 #endif
1994 #ifdef SDB_DEBUGGING_INFO
1995 else if (write_symbols == SDB_DEBUG)
1996 debug_hooks = &sdb_debug_hooks;
1997 #endif
1998 #ifdef DWARF2_DEBUGGING_INFO
1999 else if (write_symbols == DWARF2_DEBUG)
2000 debug_hooks = &dwarf2_debug_hooks;
2001 #endif
2002 #ifdef VMS_DEBUGGING_INFO
2003 else if (write_symbols == VMS_DEBUG || write_symbols == VMS_AND_DWARF2_DEBUG)
2004 debug_hooks = &vmsdbg_debug_hooks;
2005 #endif
2006 else
2007 error ("target system does not support the \"%s\" debug format",
2008 debug_type_names[write_symbols]);
2010 /* We know which debug output will be used so we can set flag_var_tracking
2011 and flag_var_tracking_uninit if the user has not specified them. */
2012 if (debug_info_level < DINFO_LEVEL_NORMAL
2013 || debug_hooks->var_location == do_nothing_debug_hooks.var_location)
2015 if (flag_var_tracking == 1
2016 || flag_var_tracking_uninit == 1)
2018 if (debug_info_level < DINFO_LEVEL_NORMAL)
2019 warning (0, "variable tracking requested, but useless unless "
2020 "producing debug info");
2021 else
2022 warning (0, "variable tracking requested, but not supported "
2023 "by this debug format");
2025 flag_var_tracking = 0;
2026 flag_var_tracking_uninit = 0;
2029 /* If the user specifically requested variable tracking with tagging
2030 uninitialized variables, we need to turn on variable tracking.
2031 (We already determined above that variable tracking is feasible.) */
2032 if (flag_var_tracking_uninit)
2033 flag_var_tracking = 1;
2035 if (flag_var_tracking == AUTODETECT_VALUE)
2036 flag_var_tracking = optimize >= 1;
2038 if (flag_var_tracking_assignments == AUTODETECT_VALUE)
2039 flag_var_tracking_assignments = flag_var_tracking
2040 && !(flag_selective_scheduling || flag_selective_scheduling2);
2042 if (flag_var_tracking_assignments_toggle)
2043 flag_var_tracking_assignments = !flag_var_tracking_assignments;
2045 if (flag_var_tracking_assignments && !flag_var_tracking)
2046 flag_var_tracking = flag_var_tracking_assignments = -1;
2048 if (flag_var_tracking_assignments
2049 && (flag_selective_scheduling || flag_selective_scheduling2))
2050 warning (0, "var-tracking-assignments changes selective scheduling");
2052 if (flag_tree_cselim == AUTODETECT_VALUE)
2053 #ifdef HAVE_conditional_move
2054 flag_tree_cselim = 1;
2055 #else
2056 flag_tree_cselim = 0;
2057 #endif
2059 /* If auxiliary info generation is desired, open the output file.
2060 This goes in the same directory as the source file--unlike
2061 all the other output files. */
2062 if (flag_gen_aux_info)
2064 aux_info_file = fopen (aux_info_file_name, "w");
2065 if (aux_info_file == 0)
2066 fatal_error ("can%'t open %s: %m", aux_info_file_name);
2069 if (! targetm.have_named_sections)
2071 if (flag_function_sections)
2073 warning (0, "-ffunction-sections not supported for this target");
2074 flag_function_sections = 0;
2076 if (flag_data_sections)
2078 warning (0, "-fdata-sections not supported for this target");
2079 flag_data_sections = 0;
2083 if (flag_function_sections && profile_flag)
2085 warning (0, "-ffunction-sections disabled; it makes profiling impossible");
2086 flag_function_sections = 0;
2089 #ifndef HAVE_prefetch
2090 if (flag_prefetch_loop_arrays)
2092 warning (0, "-fprefetch-loop-arrays not supported for this target");
2093 flag_prefetch_loop_arrays = 0;
2095 #else
2096 if (flag_prefetch_loop_arrays && !HAVE_prefetch)
2098 warning (0, "-fprefetch-loop-arrays not supported for this target (try -march switches)");
2099 flag_prefetch_loop_arrays = 0;
2101 #endif
2103 /* This combination of options isn't handled for i386 targets and doesn't
2104 make much sense anyway, so don't allow it. */
2105 if (flag_prefetch_loop_arrays && optimize_size)
2107 warning (0, "-fprefetch-loop-arrays is not supported with -Os");
2108 flag_prefetch_loop_arrays = 0;
2111 /* The presence of IEEE signaling NaNs, implies all math can trap. */
2112 if (flag_signaling_nans)
2113 flag_trapping_math = 1;
2115 /* We cannot reassociate if we want traps or signed zeros. */
2116 if (flag_associative_math && (flag_trapping_math || flag_signed_zeros))
2118 warning (0, "-fassociative-math disabled; other options take precedence");
2119 flag_associative_math = 0;
2122 /* With -fcx-limited-range, we do cheap and quick complex arithmetic. */
2123 if (flag_cx_limited_range)
2124 flag_complex_method = 0;
2126 /* With -fcx-fortran-rules, we do something in-between cheap and C99. */
2127 if (flag_cx_fortran_rules)
2128 flag_complex_method = 1;
2130 /* Targets must be able to place spill slots at lower addresses. If the
2131 target already uses a soft frame pointer, the transition is trivial. */
2132 if (!FRAME_GROWS_DOWNWARD && flag_stack_protect)
2134 warning (0, "-fstack-protector not supported for this target");
2135 flag_stack_protect = 0;
2137 if (!flag_stack_protect)
2138 warn_stack_protect = 0;
2140 /* ??? Unwind info is not correct around the CFG unless either a frame
2141 pointer is present or A_O_A is set. Fixing this requires rewriting
2142 unwind info generation to be aware of the CFG and propagating states
2143 around edges. */
2144 if (flag_unwind_tables && !ACCUMULATE_OUTGOING_ARGS
2145 && flag_omit_frame_pointer)
2147 warning (0, "unwind tables currently require a frame pointer "
2148 "for correctness");
2149 flag_omit_frame_pointer = 0;
2152 /* Save the current optimization options. */
2153 optimization_default_node = build_optimization_node ();
2154 optimization_current_node = optimization_default_node;
2157 /* This function can be called multiple times to reinitialize the compiler
2158 back end when register classes or instruction sets have changed,
2159 before each function. */
2160 static void
2161 backend_init_target (void)
2163 /* Initialize alignment variables. */
2164 init_alignments ();
2166 /* This reinitializes hard_frame_pointer, and calls init_reg_modes_target()
2167 to initialize reg_raw_mode[]. */
2168 init_emit_regs ();
2170 /* This invokes target hooks to set fixed_reg[] etc, which is
2171 mode-dependent. */
2172 init_regs ();
2174 /* This depends on stack_pointer_rtx. */
2175 init_fake_stack_mems ();
2177 /* Sets static_base_value[HARD_FRAME_POINTER_REGNUM], which is
2178 mode-dependent. */
2179 init_alias_target ();
2181 /* Depends on HARD_FRAME_POINTER_REGNUM. */
2182 init_reload ();
2184 /* The following initialization functions need to generate rtl, so
2185 provide a dummy function context for them. */
2186 init_dummy_function_start ();
2188 /* rtx_cost is mode-dependent, so cached values need to be recomputed
2189 on a mode change. */
2190 init_expmed ();
2192 /* We may need to recompute regno_save_code[] and regno_restore_code[]
2193 after a mode change as well. */
2194 if (flag_caller_saves)
2195 init_caller_save ();
2196 expand_dummy_function_end ();
2199 /* Initialize the compiler back end. This function is called only once,
2200 when starting the compiler. */
2201 static void
2202 backend_init (void)
2204 init_emit_once ();
2206 init_rtlanal ();
2207 init_inline_once ();
2208 init_varasm_once ();
2209 save_register_info ();
2211 /* Initialize the target-specific back end pieces. */
2212 ira_init_once ();
2213 backend_init_target ();
2216 /* Initialize excess precision settings. */
2217 static void
2218 init_excess_precision (void)
2220 /* Adjust excess precision handling based on the target options. If
2221 the front end cannot handle it, flag_excess_precision_cmdline
2222 will already have been set accordingly in the post_options
2223 hook. */
2224 gcc_assert (flag_excess_precision_cmdline != EXCESS_PRECISION_DEFAULT);
2225 flag_excess_precision = flag_excess_precision_cmdline;
2226 if (flag_unsafe_math_optimizations)
2227 flag_excess_precision = EXCESS_PRECISION_FAST;
2228 if (flag_excess_precision == EXCESS_PRECISION_STANDARD)
2230 int flt_eval_method = TARGET_FLT_EVAL_METHOD;
2231 switch (flt_eval_method)
2233 case -1:
2234 case 0:
2235 /* Either the target acts unpredictably (-1) or has all the
2236 operations required not to have excess precision (0). */
2237 flag_excess_precision = EXCESS_PRECISION_FAST;
2238 break;
2239 case 1:
2240 case 2:
2241 /* In these cases, predictable excess precision makes
2242 sense. */
2243 break;
2244 default:
2245 /* Any other implementation-defined FLT_EVAL_METHOD values
2246 require the compiler to handle the associated excess
2247 precision rules in excess_precision_type. */
2248 gcc_unreachable ();
2253 /* Initialize things that are both lang-dependent and target-dependent.
2254 This function can be called more than once if target parameters change. */
2255 static void
2256 lang_dependent_init_target (void)
2258 /* This determines excess precision settings. */
2259 init_excess_precision ();
2261 /* This creates various _DECL nodes, so needs to be called after the
2262 front end is initialized. It also depends on the HAVE_xxx macros
2263 generated from the target machine description. */
2264 init_optabs ();
2266 /* The following initialization functions need to generate rtl, so
2267 provide a dummy function context for them. */
2268 init_dummy_function_start ();
2270 /* Do the target-specific parts of expr initialization. */
2271 init_expr_target ();
2273 /* Although the actions of these functions are language-independent,
2274 they use optabs, so we cannot call them from backend_init. */
2275 init_set_costs ();
2276 ira_init ();
2278 expand_dummy_function_end ();
2281 /* Language-dependent initialization. Returns nonzero on success. */
2282 static int
2283 lang_dependent_init (const char *name)
2285 location_t save_loc = input_location;
2286 if (dump_base_name == 0)
2287 dump_base_name = name && name[0] ? name : "gccdump";
2289 /* Other front-end initialization. */
2290 input_location = BUILTINS_LOCATION;
2291 if (lang_hooks.init () == 0)
2292 return 0;
2293 input_location = save_loc;
2295 init_asm_output (name);
2297 /* This creates various _DECL nodes, so needs to be called after the
2298 front end is initialized. */
2299 init_eh ();
2301 /* Do the target-specific parts of the initialization. */
2302 lang_dependent_init_target ();
2304 /* If dbx symbol table desired, initialize writing it and output the
2305 predefined types. */
2306 timevar_push (TV_SYMOUT);
2308 #if defined DWARF2_DEBUGGING_INFO || defined DWARF2_UNWIND_INFO
2309 if (dwarf2out_do_frame ())
2310 dwarf2out_frame_init ();
2311 #endif
2313 /* Now we have the correct original filename, we can initialize
2314 debug output. */
2315 (*debug_hooks->init) (name);
2317 timevar_pop (TV_SYMOUT);
2319 return 1;
2323 /* Reinitialize everything when target parameters, such as register usage,
2324 have changed. */
2325 void
2326 target_reinit (void)
2328 /* Reinitialize RTL backend. */
2329 backend_init_target ();
2331 /* Reinitialize lang-dependent parts. */
2332 lang_dependent_init_target ();
2335 void
2336 dump_memory_report (bool final)
2338 ggc_print_statistics ();
2339 stringpool_statistics ();
2340 dump_tree_statistics ();
2341 dump_gimple_statistics ();
2342 dump_rtx_statistics ();
2343 dump_varray_statistics ();
2344 dump_alloc_pool_statistics ();
2345 dump_bitmap_statistics ();
2346 dump_vec_loc_statistics ();
2347 dump_ggc_loc_statistics (final);
2348 dump_alias_stats (stderr);
2349 dump_pta_stats (stderr);
2352 /* Clean up: close opened files, etc. */
2354 static void
2355 finalize (void)
2357 /* Close the dump files. */
2358 if (flag_gen_aux_info)
2360 fclose (aux_info_file);
2361 if (errorcount)
2362 unlink (aux_info_file_name);
2365 /* Close non-debugging input and output files. Take special care to note
2366 whether fclose returns an error, since the pages might still be on the
2367 buffer chain while the file is open. */
2369 if (asm_out_file)
2371 if (ferror (asm_out_file) != 0)
2372 fatal_error ("error writing to %s: %m", asm_file_name);
2373 if (fclose (asm_out_file) != 0)
2374 fatal_error ("error closing %s: %m", asm_file_name);
2375 if (flag_wpa)
2376 unlink_if_ordinary (asm_file_name);
2379 statistics_fini ();
2380 finish_optimization_passes ();
2382 ira_finish_once ();
2384 if (mem_report)
2385 dump_memory_report (true);
2387 /* Language-specific end of compilation actions. */
2388 lang_hooks.finish ();
2391 /* Initialize the compiler, and compile the input file. */
2392 static void
2393 do_compile (void)
2395 /* Initialize timing first. The C front ends read the main file in
2396 the post_options hook, and C++ does file timings. */
2397 if (time_report || !quiet_flag || flag_detailed_statistics)
2398 timevar_init ();
2399 timevar_start (TV_TOTAL);
2401 process_options ();
2403 /* Don't do any more if an error has already occurred. */
2404 if (!errorcount)
2406 /* This must be run always, because it is needed to compute the FP
2407 predefined macros, such as __LDBL_MAX__, for targets using non
2408 default FP formats. */
2409 init_adjust_machine_modes ();
2411 /* Set up the back-end if requested. */
2412 if (!no_backend)
2413 backend_init ();
2415 /* Language-dependent initialization. Returns true on success. */
2416 if (lang_dependent_init (main_input_filename))
2417 compile_file ();
2419 finalize ();
2422 /* Stop timing and print the times. */
2423 timevar_stop (TV_TOTAL);
2424 timevar_print (stderr);
2427 /* Entry point of cc1, cc1plus, jc1, f771, etc.
2428 Exit code is FATAL_EXIT_CODE if can't open files or if there were
2429 any errors, or SUCCESS_EXIT_CODE if compilation succeeded.
2431 It is not safe to call this function more than once. */
2434 toplev_main (int argc, char **argv)
2436 expandargv (&argc, &argv);
2438 save_argv = CONST_CAST2 (const char **, char **, argv);
2440 /* Initialization of GCC's environment, and diagnostics. */
2441 general_init (argv[0]);
2443 /* Parse the options and do minimal processing; basically just
2444 enough to default flags appropriately. */
2445 decode_options (argc, CONST_CAST2 (const char **, char **, argv));
2447 init_local_tick ();
2449 initialize_plugins ();
2451 if (version_flag)
2452 print_version (stderr, "");
2454 if (help_flag)
2455 print_plugins_help (stderr, "");
2457 /* Exit early if we can (e.g. -help). */
2458 if (!exit_after_options)
2459 do_compile ();
2461 if (warningcount || errorcount)
2462 print_ignored_options ();
2464 /* Invoke registered plugin callbacks if any. */
2465 invoke_plugin_callbacks (PLUGIN_FINISH, NULL);
2467 finalize_plugins ();
2468 if (errorcount || sorrycount)
2469 return (FATAL_EXIT_CODE);
2471 return (SUCCESS_EXIT_CODE);