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
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. */
29 #include "coretypes.h"
33 #ifdef HAVE_SYS_RESOURCE_H
34 # include <sys/resource.h>
37 #ifdef HAVE_SYS_TIMES_H
38 # include <sys/times.h>
44 #include "realmpfr.h" /* For GMP/MPFR/MPC versions, in print_version. */
49 #include "insn-attr.h"
50 #include "insn-config.h"
51 #include "insn-flags.h"
52 #include "hard-reg-set.h"
59 #include "basic-block.h"
65 #include "diagnostic.h"
66 #include "tree-diagnostic.h"
67 #include "tree-pretty-print.h"
71 #include "dwarf2asm.h"
72 #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 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 /* 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 /* True if this is the lto front end. This is used to disable
202 gimple generation and lowering passes that are normally run on the
203 output of a front end. These passes must be bypassed for lto since
204 they have already been done before the gimple was written. */
206 bool in_lto_p = false;
208 /* Nonzero if we should write GIMPLE bytecode for link-time optimization. */
210 int flag_generate_lto;
212 /* The FUNCTION_DECL for the function currently being compiled,
213 or 0 if between functions. */
214 tree current_function_decl;
216 /* Set to the FUNC_BEGIN label of the current function, or NULL
218 const char * current_function_func_begin_label;
220 /* Nonzero means to collect statistics which might be expensive
221 and to print them when we are done. */
222 int flag_detailed_statistics = 0;
224 /* A random sequence of characters, unless overridden by user. */
225 static const char *flag_random_seed;
227 /* A local time stamp derived from the time of compilation. It will be
228 zero if the system cannot provide a time. It will be -1u, if the
229 user has specified a particular random seed. */
234 /* Nonzero means `char' should be signed. */
236 int flag_signed_char;
238 /* Nonzero means give an enum type only as many bytes as it needs. A value
239 of 2 means it has not yet been initialized. */
241 int flag_short_enums;
243 /* Nonzero if structures and unions should be returned in memory.
245 This should only be defined if compatibility with another compiler or
246 with an ABI is needed, because it results in slower code. */
248 #ifndef DEFAULT_PCC_STRUCT_RETURN
249 #define DEFAULT_PCC_STRUCT_RETURN 1
252 /* Nonzero for -fpcc-struct-return: return values the same way PCC does. */
254 int flag_pcc_struct_return = DEFAULT_PCC_STRUCT_RETURN;
256 /* 0 means straightforward implementation of complex divide acceptable.
257 1 means wide ranges of inputs must work for complex divide.
258 2 means C99-like requirements for complex multiply and divide. */
260 int flag_complex_method = 1;
262 /* Nonzero means we should be saving declaration info into a .X file. */
264 int flag_gen_aux_info = 0;
266 /* Specified name of aux-info file. */
268 const char *aux_info_file_name;
270 /* Nonzero if we are compiling code for a shared library, zero for
275 /* Generate code for GNU or NeXT Objective-C runtime environment. */
277 #ifdef NEXT_OBJC_RUNTIME
278 int flag_next_runtime = 1;
280 int flag_next_runtime = 0;
283 /* Set to the default thread-local storage (tls) model to use. */
285 enum tls_model flag_tls_default = TLS_MODEL_GLOBAL_DYNAMIC;
287 /* Set the default region and algorithm for the integrated register
290 enum ira_algorithm flag_ira_algorithm = IRA_ALGORITHM_CB;
291 enum ira_region flag_ira_region = IRA_REGION_MIXED;
293 /* Set the default value for -fira-verbose. */
295 unsigned int flag_ira_verbose = 5;
297 /* Set the default for excess precision. */
299 enum excess_precision flag_excess_precision_cmdline = EXCESS_PRECISION_DEFAULT;
300 enum excess_precision flag_excess_precision = EXCESS_PRECISION_DEFAULT;
302 /* Nonzero means change certain warnings into errors.
303 Usually these are warnings about failure to conform to some standard. */
305 int flag_pedantic_errors = 0;
307 /* Nonzero means make permerror produce warnings instead of errors. */
309 int flag_permissive = 0;
311 /* -dA causes debug commentary information to be produced in
312 the generated assembly code (to make it more readable). This option
313 is generally only of use to those who actually need to read the
314 generated assembly code (perhaps while debugging the compiler itself).
315 Currently, this switch is only used by dwarfout.c; however, it is intended
316 to be a catchall for printing debug information in the assembler file. */
318 int flag_debug_asm = 0;
320 /* -dP causes the rtl to be emitted as a comment in assembly. */
322 int flag_dump_rtl_in_asm = 0;
324 /* When non-NULL, indicates that whenever space is allocated on the
325 stack, the resulting stack pointer must not pass this
326 address---that is, for stacks that grow downward, the stack pointer
327 must always be greater than or equal to this address; for stacks
328 that grow upward, the stack pointer must be less than this address.
329 At present, the rtx may be either a REG or a SYMBOL_REF, although
330 the support provided depends on the backend. */
333 /* Positive if we should track variables, negative if we should run
334 the var-tracking pass only to discard debug annotations, zero if
335 we're not to run it. When flag_var_tracking == AUTODETECT_VALUE it
336 will be set according to optimize, debug_info_level and debug_hooks
337 in process_options (). */
338 int flag_var_tracking = AUTODETECT_VALUE;
340 /* Positive if we should track variables at assignments, negative if
341 we should run the var-tracking pass only to discard debug
342 annotations. When flag_var_tracking_assignments ==
343 AUTODETECT_VALUE it will be set according to flag_var_tracking. */
344 int flag_var_tracking_assignments = AUTODETECT_VALUE;
346 /* Nonzero if we should toggle flag_var_tracking_assignments after
347 processing options and computing its default. */
348 int flag_var_tracking_assignments_toggle = 0;
350 /* Type of stack check. */
351 enum stack_check_type flag_stack_check = NO_STACK_CHECK;
353 /* True if the user has tagged the function with the 'section'
356 bool user_defined_section_attribute = false;
358 /* Values of the -falign-* flags: how much to align labels in code.
359 0 means `use default', 1 means `don't align'.
360 For each variable, there is an _log variant which is the power
361 of two not less than the variable, for .align output. */
364 int align_loops_max_skip;
366 int align_jumps_max_skip;
367 int align_labels_log;
368 int align_labels_max_skip;
369 int align_functions_log;
373 const char *const string;
377 lang_independent_options;
379 /* Nonzero if subexpressions must be evaluated from left-to-right. */
380 int flag_evaluation_order = 0;
382 /* The user symbol prefix after having resolved same. */
383 const char *user_label_prefix;
385 static const param_info lang_independent_params[] = {
386 #define DEFPARAM(ENUM, OPTION, HELP, DEFAULT, MIN, MAX) \
387 { OPTION, DEFAULT, false, MIN, MAX, HELP },
388 #include "params.def"
390 { NULL, 0, false, 0, 0, NULL }
393 /* Output files for assembler code (real compiler output)
394 and debugging dumps. */
398 FILE *dump_file = NULL;
399 const char *dump_file_name;
401 /* The current working directory of a translation. It's generally the
402 directory from which compilation was initiated, but a preprocessed
403 file may specify the original directory in which it was
406 static const char *src_pwd;
408 /* Initialize src_pwd with the given string, and return true. If it
409 was already initialized, return false. As a special case, it may
410 be called with a NULL argument to test whether src_pwd has NOT been
414 set_src_pwd (const char *pwd)
418 if (strcmp (src_pwd, pwd) == 0)
424 src_pwd = xstrdup (pwd);
428 /* Return the directory from which the translation unit was initiated,
429 in case set_src_pwd() was not called before to assign it a
445 /* Called when the start of a function definition is parsed,
446 this function prints on stderr the name of the function. */
448 announce_function (tree decl)
452 if (rtl_dump_and_exit)
453 fprintf (stderr, "%s ",
454 identifier_to_locale (IDENTIFIER_POINTER (DECL_NAME (decl))));
456 fprintf (stderr, " %s",
457 identifier_to_locale (lang_hooks.decl_printable_name (decl, 2)));
459 pp_needs_newline (global_dc->printer) = true;
460 diagnostic_set_last_function (global_dc, (diagnostic_info *) NULL);
464 /* Initialize local_tick with the time of day, or -1 if
465 flag_random_seed is set. */
468 init_local_tick (void)
470 if (!flag_random_seed)
472 /* Get some more or less random data. */
473 #ifdef HAVE_GETTIMEOFDAY
477 gettimeofday (&tv, NULL);
478 local_tick = tv.tv_sec * 1000 + tv.tv_usec / 1000;
482 time_t now = time (NULL);
484 if (now != (time_t)-1)
485 local_tick = (unsigned) now;
493 /* Set up a default flag_random_seed and local_tick, unless the user
494 already specified one. Must be called after init_local_tick. */
497 init_random_seed (void)
499 unsigned HOST_WIDE_INT value;
500 static char random_seed[HOST_BITS_PER_WIDE_INT / 4 + 3];
502 value = local_tick ^ getpid ();
504 sprintf (random_seed, HOST_WIDE_INT_PRINT_HEX, value);
505 flag_random_seed = random_seed;
508 /* Obtain the random_seed string. Unless NOINIT, initialize it if
509 it's not provided in the command line. */
512 get_random_seed (bool noinit)
514 if (!flag_random_seed && !noinit)
516 return flag_random_seed;
519 /* Modify the random_seed string to VAL. Return its previous
523 set_random_seed (const char *val)
525 const char *old = flag_random_seed;
526 flag_random_seed = val;
530 /* Decode the string P as an integral parameter.
531 If the string is indeed an integer return its numeric value else
532 issue an Invalid Option error for the option PNAME and return DEFVAL.
533 If PNAME is zero just return DEFVAL, do not call error. */
536 read_integral_parameter (const char *p, const char *pname, const int defval)
538 const char *endp = p;
551 error ("invalid option argument %qs", pname);
558 #if GCC_VERSION < 3004
560 /* The functions floor_log2 and exact_log2 are defined as inline
561 functions in toplev.h if GCC_VERSION >= 3004. The definitions here
562 are used for older versions of gcc. */
564 /* Given X, an unsigned number, return the largest int Y such that 2**Y <= X.
565 If X is 0, return -1. */
568 floor_log2 (unsigned HOST_WIDE_INT x)
575 if (HOST_BITS_PER_WIDE_INT > 64)
576 if (x >= (unsigned HOST_WIDE_INT) 1 << (t + 64))
578 if (HOST_BITS_PER_WIDE_INT > 32)
579 if (x >= ((unsigned HOST_WIDE_INT) 1) << (t + 32))
581 if (x >= ((unsigned HOST_WIDE_INT) 1) << (t + 16))
583 if (x >= ((unsigned HOST_WIDE_INT) 1) << (t + 8))
585 if (x >= ((unsigned HOST_WIDE_INT) 1) << (t + 4))
587 if (x >= ((unsigned HOST_WIDE_INT) 1) << (t + 2))
589 if (x >= ((unsigned HOST_WIDE_INT) 1) << (t + 1))
595 /* Return the logarithm of X, base 2, considering X unsigned,
596 if X is a power of 2. Otherwise, returns -1. */
599 exact_log2 (unsigned HOST_WIDE_INT x)
603 return floor_log2 (x);
606 #endif /* GCC_VERSION < 3004 */
608 /* Handler for fatal signals, such as SIGSEGV. These are transformed
609 into ICE messages, which is much more user friendly. In case the
610 error printer crashes, reset the signal to prevent infinite recursion. */
613 crash_signal (int signo)
615 signal (signo, SIG_DFL);
617 /* If we crashed while processing an ASM statement, then be a little more
618 graceful. It's most likely the user's fault. */
619 if (this_is_asm_operands)
621 output_operand_lossage ("unrecoverable error");
622 exit (FATAL_EXIT_CODE);
625 internal_error ("%s", strsignal (signo));
628 /* Arrange to dump core on error. (The regular error message is still
629 printed first, except in the case of abort().) */
632 setup_core_dumping (void)
635 signal (SIGABRT, SIG_DFL);
637 #if defined(HAVE_SETRLIMIT)
640 if (getrlimit (RLIMIT_CORE, &rlim) != 0)
641 fatal_error ("getting core file size maximum limit: %m");
642 rlim.rlim_cur = rlim.rlim_max;
643 if (setrlimit (RLIMIT_CORE, &rlim) != 0)
644 fatal_error ("setting core file size limit to maximum: %m");
647 diagnostic_abort_on_error (global_dc);
651 /* Strip off a legitimate source ending from the input string NAME of
652 length LEN. Rather than having to know the names used by all of
653 our front ends, we strip off an ending of a period followed by
654 up to five characters. (Java uses ".class".) */
657 strip_off_ending (char *name, int len)
660 for (i = 2; i < 6 && len > i; i++)
662 if (name[len - i] == '.')
664 name[len - i] = '\0';
670 /* Output a quoted string. */
673 output_quoted_string (FILE *asm_file, const char *string)
675 #ifdef OUTPUT_QUOTED_STRING
676 OUTPUT_QUOTED_STRING (asm_file, string);
680 putc ('\"', asm_file);
681 while ((c = *string++) != 0)
685 if (c == '\"' || c == '\\')
686 putc ('\\', asm_file);
690 fprintf (asm_file, "\\%03o", (unsigned char) c);
692 putc ('\"', asm_file);
696 /* Output a file name in the form wanted by System V. */
699 output_file_directive (FILE *asm_file, const char *input_name)
704 if (input_name == NULL)
705 input_name = "<stdin>";
707 input_name = remap_debug_filename (input_name);
709 len = strlen (input_name);
710 na = input_name + len;
712 /* NA gets INPUT_NAME sans directory names. */
713 while (na > input_name)
715 if (IS_DIR_SEPARATOR (na[-1]))
720 #ifdef ASM_OUTPUT_SOURCE_FILENAME
721 ASM_OUTPUT_SOURCE_FILENAME (asm_file, na);
723 fprintf (asm_file, "\t.file\t");
724 output_quoted_string (asm_file, na);
725 putc ('\n', asm_file);
729 /* A subroutine of wrapup_global_declarations. We've come to the end of
730 the compilation unit. All deferred variables should be undeferred,
731 and all incomplete decls should be finalized. */
734 wrapup_global_declaration_1 (tree decl)
736 /* We're not deferring this any longer. Assignment is conditional to
737 avoid needlessly dirtying PCH pages. */
738 if (CODE_CONTAINS_STRUCT (TREE_CODE (decl), TS_DECL_WITH_VIS)
739 && DECL_DEFER_OUTPUT (decl) != 0)
740 DECL_DEFER_OUTPUT (decl) = 0;
742 if (TREE_CODE (decl) == VAR_DECL && DECL_SIZE (decl) == 0)
743 lang_hooks.finish_incomplete_decl (decl);
746 /* A subroutine of wrapup_global_declarations. Decide whether or not DECL
747 needs to be output. Return true if it is output. */
750 wrapup_global_declaration_2 (tree decl)
752 if (TREE_ASM_WRITTEN (decl) || DECL_EXTERNAL (decl))
755 /* Don't write out static consts, unless we still need them.
757 We also keep static consts if not optimizing (for debugging),
758 unless the user specified -fno-keep-static-consts.
759 ??? They might be better written into the debug information.
760 This is possible when using DWARF.
762 A language processor that wants static constants to be always
763 written out (even if it is not used) is responsible for
764 calling rest_of_decl_compilation itself. E.g. the C front-end
765 calls rest_of_decl_compilation from finish_decl.
766 One motivation for this is that is conventional in some
767 environments to write things like:
768 static const char rcsid[] = "... version string ...";
769 intending to force the string to be in the executable.
771 A language processor that would prefer to have unneeded
772 static constants "optimized away" would just defer writing
773 them out until here. E.g. C++ does this, because static
774 constants are often defined in header files.
776 ??? A tempting alternative (for both C and C++) would be
777 to force a constant to be written if and only if it is
778 defined in a main file, as opposed to an include file. */
780 if (TREE_CODE (decl) == VAR_DECL && TREE_STATIC (decl))
782 struct varpool_node *node;
784 node = varpool_node (decl);
788 else if (node->alias)
790 else if (!cgraph_global_info_ready
792 || TREE_USED (DECL_ASSEMBLER_NAME (decl))))
794 else if (node->needed)
796 else if (DECL_COMDAT (decl))
798 else if (TREE_READONLY (decl) && !TREE_PUBLIC (decl)
799 && (optimize || !flag_keep_static_consts
800 || DECL_ARTIFICIAL (decl)))
805 rest_of_decl_compilation (decl, 1, 1);
813 /* Do any final processing required for the declarations in VEC, of
814 which there are LEN. We write out inline functions and variables
815 that have been deferred until this point, but which are required.
816 Returns nonzero if anything was put out. */
819 wrapup_global_declarations (tree *vec, int len)
821 bool reconsider, output_something = false;
824 for (i = 0; i < len; i++)
825 wrapup_global_declaration_1 (vec[i]);
827 /* Now emit any global variables or functions that we have been
828 putting off. We need to loop in case one of the things emitted
829 here references another one which comes earlier in the list. */
833 for (i = 0; i < len; i++)
834 reconsider |= wrapup_global_declaration_2 (vec[i]);
836 output_something = true;
840 return output_something;
843 /* A subroutine of check_global_declarations. Issue appropriate warnings
844 for the global declaration DECL. */
847 check_global_declaration_1 (tree decl)
849 /* Warn about any function declared static but not defined. We don't
850 warn about variables, because many programs have static variables
851 that exist only to get some text into the object file. */
852 if (TREE_CODE (decl) == FUNCTION_DECL
853 && DECL_INITIAL (decl) == 0
854 && DECL_EXTERNAL (decl)
855 && ! DECL_ARTIFICIAL (decl)
856 && ! TREE_NO_WARNING (decl)
857 && ! TREE_PUBLIC (decl)
858 && (warn_unused_function
859 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl))))
861 if (TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl)))
862 pedwarn (input_location, 0, "%q+F used but never defined", decl);
864 warning (OPT_Wunused_function, "%q+F declared %<static%> but never defined", decl);
865 /* This symbol is effectively an "extern" declaration now. */
866 TREE_PUBLIC (decl) = 1;
867 assemble_external (decl);
870 /* Warn about static fns or vars defined but not used. */
871 if (((warn_unused_function && TREE_CODE (decl) == FUNCTION_DECL)
872 /* We don't warn about "static const" variables because the
873 "rcs_id" idiom uses that construction. */
874 || (warn_unused_variable
875 && TREE_CODE (decl) == VAR_DECL && ! TREE_READONLY (decl)))
876 && ! DECL_IN_SYSTEM_HEADER (decl)
877 && ! TREE_USED (decl)
878 /* The TREE_USED bit for file-scope decls is kept in the identifier,
879 to handle multiple external decls in different scopes. */
880 && ! (DECL_NAME (decl) && TREE_USED (DECL_NAME (decl)))
881 && ! DECL_EXTERNAL (decl)
882 && ! TREE_PUBLIC (decl)
883 /* A volatile variable might be used in some non-obvious way. */
884 && ! TREE_THIS_VOLATILE (decl)
885 /* Global register variables must be declared to reserve them. */
886 && ! (TREE_CODE (decl) == VAR_DECL && DECL_REGISTER (decl))
887 /* Otherwise, ask the language. */
888 && lang_hooks.decls.warn_unused_global (decl))
889 warning ((TREE_CODE (decl) == FUNCTION_DECL)
890 ? OPT_Wunused_function
891 : OPT_Wunused_variable,
892 "%q+D defined but not used", decl);
895 /* Issue appropriate warnings for the global declarations in VEC (of
896 which there are LEN). */
899 check_global_declarations (tree *vec, int len)
903 for (i = 0; i < len; i++)
904 check_global_declaration_1 (vec[i]);
907 /* Emit debugging information for all global declarations in VEC. */
910 emit_debug_global_declarations (tree *vec, int len)
914 /* Avoid confusing the debug information machinery when there are errors. */
915 if (errorcount != 0 || sorrycount != 0)
918 timevar_push (TV_SYMOUT);
919 for (i = 0; i < len; i++)
920 debug_hooks->global_decl (vec[i]);
921 timevar_pop (TV_SYMOUT);
924 /* Warn about a use of an identifier which was marked deprecated. */
926 warn_deprecated_use (tree node, tree attr)
930 if (node == 0 || !warn_deprecated_decl)
936 attr = DECL_ATTRIBUTES (node);
937 else if (TYPE_P (node))
939 tree decl = TYPE_STUB_DECL (node);
941 attr = lookup_attribute ("deprecated",
942 TYPE_ATTRIBUTES (TREE_TYPE (decl)));
947 attr = lookup_attribute ("deprecated", attr);
950 msg = TREE_STRING_POINTER (TREE_VALUE (TREE_VALUE (attr)));
956 expanded_location xloc = expand_location (DECL_SOURCE_LOCATION (node));
958 warning (OPT_Wdeprecated_declarations,
959 "%qD is deprecated (declared at %s:%d): %s",
960 node, xloc.file, xloc.line, msg);
962 warning (OPT_Wdeprecated_declarations,
963 "%qD is deprecated (declared at %s:%d)",
964 node, xloc.file, xloc.line);
966 else if (TYPE_P (node))
968 tree what = NULL_TREE;
969 tree decl = TYPE_STUB_DECL (node);
971 if (TYPE_NAME (node))
973 if (TREE_CODE (TYPE_NAME (node)) == IDENTIFIER_NODE)
974 what = TYPE_NAME (node);
975 else if (TREE_CODE (TYPE_NAME (node)) == TYPE_DECL
976 && DECL_NAME (TYPE_NAME (node)))
977 what = DECL_NAME (TYPE_NAME (node));
982 expanded_location xloc
983 = expand_location (DECL_SOURCE_LOCATION (decl));
987 warning (OPT_Wdeprecated_declarations,
988 "%qE is deprecated (declared at %s:%d): %s",
989 what, xloc.file, xloc.line, msg);
991 warning (OPT_Wdeprecated_declarations,
992 "%qE is deprecated (declared at %s:%d)", what,
993 xloc.file, xloc.line);
998 warning (OPT_Wdeprecated_declarations,
999 "type is deprecated (declared at %s:%d): %s",
1000 xloc.file, xloc.line, msg);
1002 warning (OPT_Wdeprecated_declarations,
1003 "type is deprecated (declared at %s:%d)",
1004 xloc.file, xloc.line);
1012 warning (OPT_Wdeprecated_declarations, "%qE is deprecated: %s",
1015 warning (OPT_Wdeprecated_declarations, "%qE is deprecated", what);
1020 warning (OPT_Wdeprecated_declarations, "type is deprecated: %s",
1023 warning (OPT_Wdeprecated_declarations, "type is deprecated");
1029 /* Compile an entire translation unit. Write a file of assembly
1030 output and various debugging dumps. */
1035 /* Initialize yet another pass. */
1037 ggc_protect_identifiers = true;
1040 init_final (main_input_filename);
1041 coverage_init (aux_base_name);
1043 invoke_plugin_callbacks (PLUGIN_START_UNIT, NULL);
1045 timevar_push (TV_PARSE);
1047 /* Call the parser, which parses the entire file (calling
1048 rest_of_compilation for each function). */
1049 lang_hooks.parse_file (set_yydebug);
1051 /* Compilation is now finished except for writing
1052 what's left of the symbol table output. */
1053 timevar_pop (TV_PARSE);
1055 if (flag_syntax_only || flag_wpa)
1058 ggc_protect_identifiers = false;
1060 /* This must also call cgraph_finalize_compilation_unit. */
1061 lang_hooks.decls.final_write_globals ();
1063 if (errorcount || sorrycount)
1066 /* Ensure that emulated TLS control vars are finalized and build
1067 a static constructor for them, when it is required. */
1068 if (!targetm.have_tls)
1071 varpool_assemble_pending_decls ();
1072 finish_aliases_2 ();
1074 /* Likewise for mudflap static object registrations. */
1076 mudflap_finish_file ();
1078 output_shared_constant_pool ();
1079 output_object_blocks ();
1081 /* Write out any pending weak symbol declarations. */
1084 /* This must be at the end before unwind and debug info.
1085 Some target ports emit PIC setup thunks here. */
1086 targetm.asm_out.code_end ();
1088 /* Do dbx symbols. */
1089 timevar_push (TV_SYMOUT);
1091 #if defined DWARF2_DEBUGGING_INFO || defined DWARF2_UNWIND_INFO
1092 if (dwarf2out_do_frame ())
1093 dwarf2out_frame_finish ();
1096 (*debug_hooks->finish) (main_input_filename);
1097 timevar_pop (TV_SYMOUT);
1099 /* Output some stuff at end of file if nec. */
1101 dw2_output_indirect_constants ();
1103 /* Flush any pending external directives. */
1104 process_pending_assemble_externals ();
1106 /* Emit LTO marker if LTO info has been previously emitted. This is
1107 used by collect2 to determine whether an object file contains IL.
1108 We used to emit an undefined reference here, but this produces
1109 link errors if an object file with IL is stored into a shared
1110 library without invoking lto1. */
1111 if (flag_generate_lto)
1113 #if defined ASM_OUTPUT_ALIGNED_DECL_COMMON
1114 ASM_OUTPUT_ALIGNED_DECL_COMMON (asm_out_file, NULL_TREE,
1116 (unsigned HOST_WIDE_INT) 1, 8);
1117 #elif defined ASM_OUTPUT_ALIGNED_COMMON
1118 ASM_OUTPUT_ALIGNED_COMMON (asm_out_file, "__gnu_lto_v1",
1119 (unsigned HOST_WIDE_INT) 1, 8);
1121 ASM_OUTPUT_COMMON (asm_out_file, "__gnu_lto_v1",
1122 (unsigned HOST_WIDE_INT) 1,
1123 (unsigned HOST_WIDE_INT) 1);
1127 /* Attach a special .ident directive to the end of the file to identify
1128 the version of GCC which compiled this code. The format of the .ident
1129 string is patterned after the ones produced by native SVR4 compilers. */
1133 const char *pkg_version = "(GNU) ";
1135 if (strcmp ("(GCC) ", pkgversion_string))
1136 pkg_version = pkgversion_string;
1137 fprintf (asm_out_file, "%s\"GCC: %s%s\"\n",
1138 IDENT_ASM_OP, pkg_version, version_string);
1142 /* Invoke registered plugin callbacks. */
1143 invoke_plugin_callbacks (PLUGIN_FINISH_UNIT, NULL);
1145 /* This must be at the end. Some target ports emit end of file directives
1146 into the assembly file here, and hence we can not output anything to the
1147 assembly file after this point. */
1148 targetm.asm_out.file_end ();
1151 /* Parse a -d... command line switch. */
1154 decode_d_option (const char *arg)
1165 flag_print_asm_name = 1;
1168 flag_dump_rtl_in_asm = 1;
1169 flag_print_asm_name = 1;
1172 graph_dump_format = vcg;
1175 rtl_dump_and_exit = 1;
1180 case 'D': /* These are handled by the preprocessor. */
1187 setup_core_dumping();
1190 enable_rtl_dump_file ();
1194 warning (0, "unrecognized gcc debugging option: %c", c);
1199 /* Indexed by enum debug_info_type. */
1200 const char *const debug_type_names[] =
1202 "none", "stabs", "coff", "dwarf-2", "xcoff", "vms"
1205 /* Print version information to FILE.
1206 Each line begins with INDENT (for the case where FILE is the
1207 assembler output file). */
1210 print_version (FILE *file, const char *indent)
1212 static const char fmt1[] =
1214 N_("%s%s%s %sversion %s (%s)\n%s\tcompiled by GNU C version %s, ")
1216 N_("%s%s%s %sversion %s (%s) compiled by CC, ")
1219 static const char fmt2[] =
1220 N_("GMP version %s, MPFR version %s, MPC version %s\n");
1221 static const char fmt3[] =
1222 N_("%s%swarning: %s header version %s differs from library version %s.\n");
1223 static const char fmt4[] =
1224 N_("%s%sGGC heuristics: --param ggc-min-expand=%d --param ggc-min-heapsize=%d\n");
1226 #define __VERSION__ "[?]"
1229 file == stderr ? _(fmt1) : fmt1,
1230 indent, *indent != 0 ? " " : "",
1231 lang_hooks.name, pkgversion_string, version_string, TARGET_NAME,
1232 indent, __VERSION__);
1234 /* We need to stringify the GMP macro values. Ugh, gmp_version has
1235 two string formats, "i.j.k" and "i.j" when k is zero. As of
1236 gmp-4.3.0, GMP always uses the 3 number format. */
1237 #define GCC_GMP_STRINGIFY_VERSION3(X) #X
1238 #define GCC_GMP_STRINGIFY_VERSION2(X) GCC_GMP_STRINGIFY_VERSION3(X)
1239 #define GCC_GMP_VERSION_NUM(X,Y,Z) (((X) << 16L) | ((Y) << 8) | (Z))
1240 #define GCC_GMP_VERSION \
1241 GCC_GMP_VERSION_NUM(__GNU_MP_VERSION, __GNU_MP_VERSION_MINOR, __GNU_MP_VERSION_PATCHLEVEL)
1242 #if GCC_GMP_VERSION < GCC_GMP_VERSION_NUM(4,3,0) && __GNU_MP_VERSION_PATCHLEVEL == 0
1243 #define GCC_GMP_STRINGIFY_VERSION GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION) "." \
1244 GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION_MINOR)
1246 #define GCC_GMP_STRINGIFY_VERSION GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION) "." \
1247 GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION_MINOR) "." \
1248 GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION_PATCHLEVEL)
1251 file == stderr ? _(fmt2) : fmt2,
1252 GCC_GMP_STRINGIFY_VERSION, MPFR_VERSION_STRING, MPC_VERSION_STRING);
1253 if (strcmp (GCC_GMP_STRINGIFY_VERSION, gmp_version))
1255 file == stderr ? _(fmt3) : fmt3,
1256 indent, *indent != 0 ? " " : "",
1257 "GMP", GCC_GMP_STRINGIFY_VERSION, gmp_version);
1258 if (strcmp (MPFR_VERSION_STRING, mpfr_get_version ()))
1260 file == stderr ? _(fmt3) : fmt3,
1261 indent, *indent != 0 ? " " : "",
1262 "MPFR", MPFR_VERSION_STRING, mpfr_get_version ());
1263 if (strcmp (MPC_VERSION_STRING, mpc_get_version ()))
1265 file == stderr ? _(fmt3) : fmt3,
1266 indent, *indent != 0 ? " " : "",
1267 "MPC", MPC_VERSION_STRING, mpc_get_version ());
1269 file == stderr ? _(fmt4) : fmt4,
1270 indent, *indent != 0 ? " " : "",
1271 PARAM_VALUE (GGC_MIN_EXPAND), PARAM_VALUE (GGC_MIN_HEAPSIZE));
1273 print_plugins_versions (file, indent);
1276 #ifdef ASM_COMMENT_START
1278 print_to_asm_out_file (print_switch_type type, const char * text)
1280 bool prepend_sep = true;
1284 case SWITCH_TYPE_LINE_END:
1285 putc ('\n', asm_out_file);
1288 case SWITCH_TYPE_LINE_START:
1289 fputs (ASM_COMMENT_START, asm_out_file);
1290 return strlen (ASM_COMMENT_START);
1292 case SWITCH_TYPE_DESCRIPTIVE:
1293 if (ASM_COMMENT_START[0] == 0)
1294 prepend_sep = false;
1296 case SWITCH_TYPE_PASSED:
1297 case SWITCH_TYPE_ENABLED:
1299 fputc (' ', asm_out_file);
1300 fputs (text, asm_out_file);
1301 /* No need to return the length here as
1302 print_single_switch has already done it. */
1312 print_to_stderr (print_switch_type type, const char * text)
1316 case SWITCH_TYPE_LINE_END:
1317 putc ('\n', stderr);
1320 case SWITCH_TYPE_LINE_START:
1323 case SWITCH_TYPE_PASSED:
1324 case SWITCH_TYPE_ENABLED:
1325 fputc (' ', stderr);
1328 case SWITCH_TYPE_DESCRIPTIVE:
1329 fputs (text, stderr);
1330 /* No need to return the length here as
1331 print_single_switch has already done it. */
1339 /* Print an option value and return the adjusted position in the line.
1340 ??? print_fn doesn't handle errors, eg disk full; presumably other
1341 code will catch a disk full though. */
1344 print_single_switch (print_switch_fn_type print_fn,
1346 print_switch_type type,
1349 /* The ultrix fprintf returns 0 on success, so compute the result
1350 we want here since we need it for the following test. The +1
1351 is for the separator character that will probably be emitted. */
1352 int len = strlen (text) + 1;
1355 && pos + len > MAX_LINE)
1357 print_fn (SWITCH_TYPE_LINE_END, NULL);
1362 pos += print_fn (SWITCH_TYPE_LINE_START, NULL);
1364 print_fn (type, text);
1368 /* Print active target switches using PRINT_FN.
1369 POS is the current cursor position and MAX is the size of a "line".
1370 Each line begins with INDENT and ends with TERM.
1371 Each switch is separated from the next by SEP. */
1374 print_switch_values (print_switch_fn_type print_fn)
1380 /* Fill in the -frandom-seed option, if the user didn't pass it, so
1381 that it can be printed below. This helps reproducibility. */
1382 if (!flag_random_seed)
1383 init_random_seed ();
1385 /* Print the options as passed. */
1386 pos = print_single_switch (print_fn, pos,
1387 SWITCH_TYPE_DESCRIPTIVE, _("options passed: "));
1389 for (p = &save_argv[1]; *p != NULL; p++)
1394 if (strcmp (*p, "-o") == 0
1395 || strcmp (*p, "-dumpbase") == 0
1396 || strcmp (*p, "-dumpdir") == 0
1397 || strcmp (*p, "-auxbase") == 0)
1404 if (strcmp (*p, "-quiet") == 0
1405 || strcmp (*p, "-version") == 0)
1412 pos = print_single_switch (print_fn, pos, SWITCH_TYPE_PASSED, *p);
1416 print_fn (SWITCH_TYPE_LINE_END, NULL);
1418 /* Print the -f and -m options that have been enabled.
1419 We don't handle language specific options but printing argv
1421 pos = print_single_switch (print_fn, 0,
1422 SWITCH_TYPE_DESCRIPTIVE, _("options enabled: "));
1424 for (j = 0; j < cl_options_count; j++)
1425 if ((cl_options[j].flags & CL_REPORT)
1426 && option_enabled (j) > 0)
1427 pos = print_single_switch (print_fn, pos,
1428 SWITCH_TYPE_ENABLED, cl_options[j].opt_text);
1430 print_fn (SWITCH_TYPE_LINE_END, NULL);
1433 /* Open assembly code output file. Do this even if -fsyntax-only is
1434 on, because then the driver will have provided the name of a
1435 temporary file or bit bucket for us. NAME is the file specified on
1436 the command line, possibly NULL. */
1438 init_asm_output (const char *name)
1440 if (name == NULL && asm_file_name == 0)
1441 asm_out_file = stdout;
1444 if (asm_file_name == 0)
1446 int len = strlen (dump_base_name);
1447 char *dumpname = XNEWVEC (char, len + 6);
1449 memcpy (dumpname, dump_base_name, len + 1);
1450 strip_off_ending (dumpname, len);
1451 strcat (dumpname, ".s");
1452 asm_file_name = dumpname;
1454 if (!strcmp (asm_file_name, "-"))
1455 asm_out_file = stdout;
1457 asm_out_file = fopen (asm_file_name, "w+b");
1458 if (asm_out_file == 0)
1459 fatal_error ("can%'t open %s for writing: %m", asm_file_name);
1462 if (!flag_syntax_only)
1464 targetm.asm_out.file_start ();
1466 if (flag_record_gcc_switches)
1468 if (targetm.asm_out.record_gcc_switches)
1470 /* Let the target know that we are about to start recording. */
1471 targetm.asm_out.record_gcc_switches (SWITCH_TYPE_DESCRIPTIVE,
1473 /* Now record the switches. */
1474 print_switch_values (targetm.asm_out.record_gcc_switches);
1475 /* Let the target know that the recording is over. */
1476 targetm.asm_out.record_gcc_switches (SWITCH_TYPE_DESCRIPTIVE,
1480 inform (input_location, "-frecord-gcc-switches is not supported by the current target");
1483 #ifdef ASM_COMMENT_START
1484 if (flag_verbose_asm)
1486 /* Print the list of switches in effect
1487 into the assembler file as comments. */
1488 print_version (asm_out_file, ASM_COMMENT_START);
1489 print_switch_values (print_to_asm_out_file);
1490 putc ('\n', asm_out_file);
1496 /* Return true if the state of option OPTION should be stored in PCH files
1497 and checked by default_pch_valid_p. Store the option's current state
1501 option_affects_pch_p (int option, struct cl_option_state *state)
1503 if ((cl_options[option].flags & CL_TARGET) == 0)
1505 if (cl_options[option].flag_var == &target_flags)
1506 if (targetm.check_pch_target_flags)
1508 return get_option_state (option, state);
1511 /* Default version of get_pch_validity.
1512 By default, every flag difference is fatal; that will be mostly right for
1513 most targets, but completely right for very few. */
1516 default_get_pch_validity (size_t *sz)
1518 struct cl_option_state state;
1523 if (targetm.check_pch_target_flags)
1524 *sz += sizeof (target_flags);
1525 for (i = 0; i < cl_options_count; i++)
1526 if (option_affects_pch_p (i, &state))
1529 result = r = XNEWVEC (char, *sz);
1533 if (targetm.check_pch_target_flags)
1535 memcpy (r, &target_flags, sizeof (target_flags));
1536 r += sizeof (target_flags);
1539 for (i = 0; i < cl_options_count; i++)
1540 if (option_affects_pch_p (i, &state))
1542 memcpy (r, state.data, state.size);
1549 /* Return a message which says that a PCH file was created with a different
1550 setting of OPTION. */
1553 pch_option_mismatch (const char *option)
1557 asprintf (&r, _("created and used with differing settings of '%s'"), option);
1559 return _("out of memory");
1563 /* Default version of pch_valid_p. */
1566 default_pch_valid_p (const void *data_p, size_t len)
1568 struct cl_option_state state;
1569 const char *data = (const char *)data_p;
1572 /* -fpic and -fpie also usually make a PCH invalid. */
1573 if (data[0] != flag_pic)
1574 return _("created and used with different settings of -fpic");
1575 if (data[1] != flag_pie)
1576 return _("created and used with different settings of -fpie");
1579 /* Check target_flags. */
1580 if (targetm.check_pch_target_flags)
1585 memcpy (&tf, data, sizeof (target_flags));
1586 data += sizeof (target_flags);
1587 len -= sizeof (target_flags);
1588 r = targetm.check_pch_target_flags (tf);
1593 for (i = 0; i < cl_options_count; i++)
1594 if (option_affects_pch_p (i, &state))
1596 if (memcmp (data, state.data, state.size) != 0)
1597 return pch_option_mismatch (cl_options[i].opt_text);
1605 /* Default tree printer. Handles declarations only. */
1607 default_tree_printer (pretty_printer *pp, text_info *text, const char *spec,
1608 int precision, bool wide, bool set_locus, bool hash)
1612 /* FUTURE: %+x should set the locus. */
1613 if (precision != 0 || wide || hash)
1619 t = va_arg (*text->args_ptr, tree);
1620 if (TREE_CODE (t) == IDENTIFIER_NODE)
1622 pp_identifier (pp, IDENTIFIER_POINTER (t));
1628 t = va_arg (*text->args_ptr, tree);
1629 if (DECL_DEBUG_EXPR_IS_FROM (t) && DECL_DEBUG_EXPR (t))
1630 t = DECL_DEBUG_EXPR (t);
1635 t = va_arg (*text->args_ptr, tree);
1639 percent_K_format (text);
1646 if (set_locus && text->locus)
1647 *text->locus = DECL_SOURCE_LOCATION (t);
1651 const char *n = DECL_NAME (t)
1652 ? identifier_to_locale (lang_hooks.decl_printable_name (t, 2))
1657 dump_generic_node (pp, t, 0, TDF_DIAGNOSTIC, 0);
1662 /* A helper function; used as the reallocator function for cpp's line
1665 realloc_for_line_map (void *ptr, size_t len)
1667 return ggc_realloc (ptr, len);
1670 /* Initialization of the front end environment, before command line
1671 options are parsed. Signal handlers, internationalization etc.
1672 ARGV0 is main's argv[0]. */
1674 general_init (const char *argv0)
1678 p = argv0 + strlen (argv0);
1679 while (p != argv0 && !IS_DIR_SEPARATOR (p[-1]))
1683 xmalloc_set_program_name (progname);
1687 /* Unlock the stdio streams. */
1688 unlock_std_streams ();
1690 gcc_init_libintl ();
1692 /* Initialize the diagnostics reporting machinery, so option parsing
1693 can give warnings and errors. */
1694 diagnostic_initialize (global_dc);
1695 diagnostic_starter (global_dc) = default_tree_diagnostic_starter;
1696 /* Set a default printer. Language specific initializations will
1697 override it later. */
1698 pp_format_decoder (global_dc->printer) = &default_tree_printer;
1699 global_dc->show_option_requested = flag_diagnostics_show_option;
1700 global_dc->internal_error = plugins_internal_error_function;
1702 /* Trap fatal signals, e.g. SIGSEGV, and convert them to ICE messages. */
1704 signal (SIGSEGV, crash_signal);
1707 signal (SIGILL, crash_signal);
1710 signal (SIGBUS, crash_signal);
1713 signal (SIGABRT, crash_signal);
1715 #if defined SIGIOT && (!defined SIGABRT || SIGABRT != SIGIOT)
1716 signal (SIGIOT, crash_signal);
1719 signal (SIGFPE, crash_signal);
1722 /* Other host-specific signal setup. */
1723 (*host_hooks.extra_signals)();
1725 /* Initialize the garbage-collector, string pools and tree type hash
1729 line_table = GGC_NEW (struct line_maps);
1730 linemap_init (line_table);
1731 line_table->reallocator = realloc_for_line_map;
1734 /* Initialize register usage now so switches may override. */
1737 /* Register the language-independent parameters. */
1738 add_params (lang_independent_params, LAST_PARAM);
1740 /* This must be done after add_params but before argument processing. */
1741 init_ggc_heuristics();
1742 init_optimization_passes ();
1743 statistics_early_init ();
1746 /* Return true if the current target supports -fsection-anchors. */
1749 target_supports_section_anchors_p (void)
1751 if (targetm.min_anchor_offset == 0 && targetm.max_anchor_offset == 0)
1754 if (targetm.asm_out.output_anchor == NULL)
1760 /* Default the align_* variables to 1 if they're still unset, and
1761 set up the align_*_log variables. */
1763 init_alignments (void)
1765 if (align_loops <= 0)
1767 if (align_loops_max_skip > align_loops)
1768 align_loops_max_skip = align_loops - 1;
1769 align_loops_log = floor_log2 (align_loops * 2 - 1);
1770 if (align_jumps <= 0)
1772 if (align_jumps_max_skip > align_jumps)
1773 align_jumps_max_skip = align_jumps - 1;
1774 align_jumps_log = floor_log2 (align_jumps * 2 - 1);
1775 if (align_labels <= 0)
1777 align_labels_log = floor_log2 (align_labels * 2 - 1);
1778 if (align_labels_max_skip > align_labels)
1779 align_labels_max_skip = align_labels - 1;
1780 if (align_functions <= 0)
1781 align_functions = 1;
1782 align_functions_log = floor_log2 (align_functions * 2 - 1);
1785 /* Process the options that have been parsed. */
1787 process_options (void)
1789 /* Just in case lang_hooks.post_options ends up calling a debug_hook.
1790 This can happen with incorrect pre-processed input. */
1791 debug_hooks = &do_nothing_debug_hooks;
1793 /* This replaces set_Wunused. */
1794 if (warn_unused_function == -1)
1795 warn_unused_function = warn_unused;
1796 if (warn_unused_label == -1)
1797 warn_unused_label = warn_unused;
1798 /* Wunused-parameter is enabled if both -Wunused -Wextra are enabled. */
1799 if (warn_unused_parameter == -1)
1800 warn_unused_parameter = (warn_unused && extra_warnings);
1801 if (warn_unused_variable == -1)
1802 warn_unused_variable = warn_unused;
1803 /* Wunused-but-set-parameter is enabled if both -Wunused -Wextra are
1805 if (warn_unused_but_set_parameter == -1)
1806 warn_unused_but_set_parameter = (warn_unused && extra_warnings);
1807 if (warn_unused_but_set_variable == -1)
1808 warn_unused_but_set_variable = warn_unused;
1809 if (warn_unused_value == -1)
1810 warn_unused_value = warn_unused;
1812 /* This replaces set_Wextra. */
1813 if (warn_uninitialized == -1)
1814 warn_uninitialized = extra_warnings;
1816 /* Allow the front end to perform consistency checks and do further
1817 initialization based on the command line options. This hook also
1818 sets the original filename if appropriate (e.g. foo.i -> foo.c)
1819 so we can correctly initialize debug output. */
1820 no_backend = lang_hooks.post_options (&main_input_filename);
1822 #ifdef OVERRIDE_OPTIONS
1823 /* Some machines may reject certain combinations of options. */
1827 /* Avoid any informative notes in the second run of -fcompare-debug. */
1828 if (flag_compare_debug)
1829 diagnostic_inhibit_notes (global_dc);
1831 global_dc->show_column = flag_show_column;
1832 global_dc->pedantic_errors = flag_pedantic_errors;
1833 global_dc->permissive = flag_permissive;
1834 global_dc->fatal_errors = flag_fatal_errors;
1836 if (flag_section_anchors && !target_supports_section_anchors_p ())
1838 warning (OPT_fsection_anchors,
1839 "this target does not support %qs", "-fsection-anchors");
1840 flag_section_anchors = 0;
1843 if (flag_short_enums == 2)
1844 flag_short_enums = targetm.default_short_enums ();
1846 /* Set aux_base_name if not already set. */
1849 else if (main_input_filename)
1851 char *name = xstrdup (lbasename (main_input_filename));
1853 strip_off_ending (name, strlen (name));
1854 aux_base_name = name;
1857 aux_base_name = "gccaux";
1862 || flag_loop_interchange
1863 || flag_loop_strip_mine
1864 || flag_graphite_identity
1865 || flag_loop_parallelize_all)
1866 sorry ("Graphite loop optimizations cannot be used");
1869 /* Unrolling all loops implies that standard loop unrolling must also
1871 if (flag_unroll_all_loops)
1872 flag_unroll_loops = 1;
1874 /* The loop unrolling code assumes that cse will be run after loop.
1875 web and rename-registers also help when run after loop unrolling. */
1876 if (flag_rerun_cse_after_loop == AUTODETECT_VALUE)
1877 flag_rerun_cse_after_loop = flag_unroll_loops || flag_peel_loops;
1879 if (flag_web == AUTODETECT_VALUE)
1880 flag_web = flag_unroll_loops || flag_peel_loops;
1882 if (flag_rename_registers == AUTODETECT_VALUE)
1883 flag_rename_registers = flag_unroll_loops || flag_peel_loops;
1885 if (flag_non_call_exceptions)
1886 flag_asynchronous_unwind_tables = 1;
1887 if (flag_asynchronous_unwind_tables)
1888 flag_unwind_tables = 1;
1890 if (flag_value_profile_transformations)
1891 flag_profile_values = 1;
1893 /* Warn about options that are not supported on this machine. */
1894 #ifndef INSN_SCHEDULING
1895 if (flag_schedule_insns || flag_schedule_insns_after_reload)
1896 warning (0, "instruction scheduling not supported on this target machine");
1899 if (flag_delayed_branch)
1900 warning (0, "this target machine does not have delayed branches");
1903 user_label_prefix = USER_LABEL_PREFIX;
1904 if (flag_leading_underscore != -1)
1906 /* If the default prefix is more complicated than "" or "_",
1907 issue a warning and ignore this option. */
1908 if (user_label_prefix[0] == 0 ||
1909 (user_label_prefix[0] == '_' && user_label_prefix[1] == 0))
1911 user_label_prefix = flag_leading_underscore ? "_" : "";
1914 warning (0, "-f%sleading-underscore not supported on this target machine",
1915 flag_leading_underscore ? "" : "no-");
1918 /* If we are in verbose mode, write out the version and maybe all the
1919 option flags in use. */
1922 print_version (stderr, "");
1924 print_switch_values (print_to_stderr);
1927 if (flag_syntax_only)
1929 write_symbols = NO_DEBUG;
1935 if (debug_info_level == DINFO_LEVEL_NONE)
1937 debug_info_level = DINFO_LEVEL_NORMAL;
1939 if (write_symbols == NO_DEBUG)
1940 write_symbols = PREFERRED_DEBUGGING_TYPE;
1943 debug_info_level = DINFO_LEVEL_NONE;
1946 if (flag_dump_final_insns && !flag_syntax_only && !no_backend)
1948 FILE *final_output = fopen (flag_dump_final_insns, "w");
1951 error ("could not open final insn dump file %qs: %s",
1952 flag_dump_final_insns, strerror (errno));
1953 flag_dump_final_insns = NULL;
1955 else if (fclose (final_output))
1957 error ("could not close zeroed insn dump file %qs: %s",
1958 flag_dump_final_insns, strerror (errno));
1959 flag_dump_final_insns = NULL;
1963 /* Unless over-ridden for the target, assume that all DWARF levels
1964 may be emitted, if DWARF2_DEBUG is selected. */
1965 if (dwarf_strict < 0)
1968 /* A lot of code assumes write_symbols == NO_DEBUG if the debugging
1970 if (debug_info_level == DINFO_LEVEL_NONE)
1971 write_symbols = NO_DEBUG;
1973 if (write_symbols == NO_DEBUG)
1975 #if defined(DBX_DEBUGGING_INFO)
1976 else if (write_symbols == DBX_DEBUG)
1977 debug_hooks = &dbx_debug_hooks;
1979 #if defined(XCOFF_DEBUGGING_INFO)
1980 else if (write_symbols == XCOFF_DEBUG)
1981 debug_hooks = &xcoff_debug_hooks;
1983 #ifdef SDB_DEBUGGING_INFO
1984 else if (write_symbols == SDB_DEBUG)
1985 debug_hooks = &sdb_debug_hooks;
1987 #ifdef DWARF2_DEBUGGING_INFO
1988 else if (write_symbols == DWARF2_DEBUG)
1989 debug_hooks = &dwarf2_debug_hooks;
1991 #ifdef VMS_DEBUGGING_INFO
1992 else if (write_symbols == VMS_DEBUG || write_symbols == VMS_AND_DWARF2_DEBUG)
1993 debug_hooks = &vmsdbg_debug_hooks;
1996 error ("target system does not support the \"%s\" debug format",
1997 debug_type_names[write_symbols]);
1999 /* We know which debug output will be used so we can set flag_var_tracking
2000 and flag_var_tracking_uninit if the user has not specified them. */
2001 if (debug_info_level < DINFO_LEVEL_NORMAL
2002 || debug_hooks->var_location == do_nothing_debug_hooks.var_location)
2004 if (flag_var_tracking == 1
2005 || flag_var_tracking_uninit == 1)
2007 if (debug_info_level < DINFO_LEVEL_NORMAL)
2008 warning (0, "variable tracking requested, but useless unless "
2009 "producing debug info");
2011 warning (0, "variable tracking requested, but not supported "
2012 "by this debug format");
2014 flag_var_tracking = 0;
2015 flag_var_tracking_uninit = 0;
2018 /* If the user specifically requested variable tracking with tagging
2019 uninitialized variables, we need to turn on variable tracking.
2020 (We already determined above that variable tracking is feasible.) */
2021 if (flag_var_tracking_uninit)
2022 flag_var_tracking = 1;
2024 if (flag_var_tracking == AUTODETECT_VALUE)
2025 flag_var_tracking = optimize >= 1;
2027 if (flag_var_tracking_assignments == AUTODETECT_VALUE)
2028 flag_var_tracking_assignments = flag_var_tracking
2029 && !(flag_selective_scheduling || flag_selective_scheduling2);
2031 if (flag_var_tracking_assignments_toggle)
2032 flag_var_tracking_assignments = !flag_var_tracking_assignments;
2034 if (flag_var_tracking_assignments && !flag_var_tracking)
2035 flag_var_tracking = flag_var_tracking_assignments = -1;
2037 if (flag_var_tracking_assignments
2038 && (flag_selective_scheduling || flag_selective_scheduling2))
2039 warning (0, "var-tracking-assignments changes selective scheduling");
2041 if (flag_tree_cselim == AUTODETECT_VALUE)
2042 #ifdef HAVE_conditional_move
2043 flag_tree_cselim = 1;
2045 flag_tree_cselim = 0;
2048 /* If auxiliary info generation is desired, open the output file.
2049 This goes in the same directory as the source file--unlike
2050 all the other output files. */
2051 if (flag_gen_aux_info)
2053 aux_info_file = fopen (aux_info_file_name, "w");
2054 if (aux_info_file == 0)
2055 fatal_error ("can%'t open %s: %m", aux_info_file_name);
2058 if (! targetm.have_named_sections)
2060 if (flag_function_sections)
2062 warning (0, "-ffunction-sections not supported for this target");
2063 flag_function_sections = 0;
2065 if (flag_data_sections)
2067 warning (0, "-fdata-sections not supported for this target");
2068 flag_data_sections = 0;
2072 if (flag_function_sections && profile_flag)
2074 warning (0, "-ffunction-sections disabled; it makes profiling impossible");
2075 flag_function_sections = 0;
2078 #ifndef HAVE_prefetch
2079 if (flag_prefetch_loop_arrays)
2081 warning (0, "-fprefetch-loop-arrays not supported for this target");
2082 flag_prefetch_loop_arrays = 0;
2085 if (flag_prefetch_loop_arrays && !HAVE_prefetch)
2087 warning (0, "-fprefetch-loop-arrays not supported for this target (try -march switches)");
2088 flag_prefetch_loop_arrays = 0;
2092 /* This combination of options isn't handled for i386 targets and doesn't
2093 make much sense anyway, so don't allow it. */
2094 if (flag_prefetch_loop_arrays && optimize_size)
2096 warning (0, "-fprefetch-loop-arrays is not supported with -Os");
2097 flag_prefetch_loop_arrays = 0;
2100 /* The presence of IEEE signaling NaNs, implies all math can trap. */
2101 if (flag_signaling_nans)
2102 flag_trapping_math = 1;
2104 /* We cannot reassociate if we want traps or signed zeros. */
2105 if (flag_associative_math && (flag_trapping_math || flag_signed_zeros))
2107 warning (0, "-fassociative-math disabled; other options take precedence");
2108 flag_associative_math = 0;
2111 /* With -fcx-limited-range, we do cheap and quick complex arithmetic. */
2112 if (flag_cx_limited_range)
2113 flag_complex_method = 0;
2115 /* With -fcx-fortran-rules, we do something in-between cheap and C99. */
2116 if (flag_cx_fortran_rules)
2117 flag_complex_method = 1;
2119 /* Targets must be able to place spill slots at lower addresses. If the
2120 target already uses a soft frame pointer, the transition is trivial. */
2121 if (!FRAME_GROWS_DOWNWARD && flag_stack_protect)
2123 warning (0, "-fstack-protector not supported for this target");
2124 flag_stack_protect = 0;
2126 if (!flag_stack_protect)
2127 warn_stack_protect = 0;
2129 /* ??? Unwind info is not correct around the CFG unless either a frame
2130 pointer is present or A_O_A is set. Fixing this requires rewriting
2131 unwind info generation to be aware of the CFG and propagating states
2133 if (flag_unwind_tables && !ACCUMULATE_OUTGOING_ARGS
2134 && flag_omit_frame_pointer)
2136 warning (0, "unwind tables currently require a frame pointer "
2138 flag_omit_frame_pointer = 0;
2141 /* Save the current optimization options. */
2142 optimization_default_node = build_optimization_node ();
2143 optimization_current_node = optimization_default_node;
2146 /* This function can be called multiple times to reinitialize the compiler
2147 back end when register classes or instruction sets have changed,
2148 before each function. */
2150 backend_init_target (void)
2152 /* Initialize alignment variables. */
2155 /* This reinitializes hard_frame_pointer, and calls init_reg_modes_target()
2156 to initialize reg_raw_mode[]. */
2159 /* This invokes target hooks to set fixed_reg[] etc, which is
2163 /* This depends on stack_pointer_rtx. */
2164 init_fake_stack_mems ();
2166 /* Sets static_base_value[HARD_FRAME_POINTER_REGNUM], which is
2168 init_alias_target ();
2170 /* Depends on HARD_FRAME_POINTER_REGNUM. */
2173 /* The following initialization functions need to generate rtl, so
2174 provide a dummy function context for them. */
2175 init_dummy_function_start ();
2177 /* rtx_cost is mode-dependent, so cached values need to be recomputed
2178 on a mode change. */
2181 /* We may need to recompute regno_save_code[] and regno_restore_code[]
2182 after a mode change as well. */
2183 caller_save_initialized_p = false;
2185 expand_dummy_function_end ();
2188 /* Initialize the compiler back end. This function is called only once,
2189 when starting the compiler. */
2196 init_inline_once ();
2197 init_varasm_once ();
2198 save_register_info ();
2200 /* Initialize the target-specific back end pieces. */
2202 backend_init_target ();
2205 /* Initialize excess precision settings. */
2207 init_excess_precision (void)
2209 /* Adjust excess precision handling based on the target options. If
2210 the front end cannot handle it, flag_excess_precision_cmdline
2211 will already have been set accordingly in the post_options
2213 gcc_assert (flag_excess_precision_cmdline != EXCESS_PRECISION_DEFAULT);
2214 flag_excess_precision = flag_excess_precision_cmdline;
2215 if (flag_unsafe_math_optimizations)
2216 flag_excess_precision = EXCESS_PRECISION_FAST;
2217 if (flag_excess_precision == EXCESS_PRECISION_STANDARD)
2219 int flt_eval_method = TARGET_FLT_EVAL_METHOD;
2220 switch (flt_eval_method)
2224 /* Either the target acts unpredictably (-1) or has all the
2225 operations required not to have excess precision (0). */
2226 flag_excess_precision = EXCESS_PRECISION_FAST;
2230 /* In these cases, predictable excess precision makes
2234 /* Any other implementation-defined FLT_EVAL_METHOD values
2235 require the compiler to handle the associated excess
2236 precision rules in excess_precision_type. */
2242 /* Initialize things that are both lang-dependent and target-dependent.
2243 This function can be called more than once if target parameters change. */
2245 lang_dependent_init_target (void)
2247 /* This determines excess precision settings. */
2248 init_excess_precision ();
2250 /* This creates various _DECL nodes, so needs to be called after the
2251 front end is initialized. It also depends on the HAVE_xxx macros
2252 generated from the target machine description. */
2255 /* The following initialization functions need to generate rtl, so
2256 provide a dummy function context for them. */
2257 init_dummy_function_start ();
2259 /* Do the target-specific parts of expr initialization. */
2260 init_expr_target ();
2262 /* Although the actions of these functions are language-independent,
2263 they use optabs, so we cannot call them from backend_init. */
2267 expand_dummy_function_end ();
2270 /* Language-dependent initialization. Returns nonzero on success. */
2272 lang_dependent_init (const char *name)
2274 location_t save_loc = input_location;
2275 if (dump_base_name == 0)
2276 dump_base_name = name && name[0] ? name : "gccdump";
2278 /* Other front-end initialization. */
2279 input_location = BUILTINS_LOCATION;
2280 if (lang_hooks.init () == 0)
2282 input_location = save_loc;
2284 init_asm_output (name);
2286 /* This creates various _DECL nodes, so needs to be called after the
2287 front end is initialized. */
2290 /* Do the target-specific parts of the initialization. */
2291 lang_dependent_init_target ();
2293 /* If dbx symbol table desired, initialize writing it and output the
2294 predefined types. */
2295 timevar_push (TV_SYMOUT);
2297 #if defined DWARF2_DEBUGGING_INFO || defined DWARF2_UNWIND_INFO
2298 if (dwarf2out_do_frame ())
2299 dwarf2out_frame_init ();
2302 /* Now we have the correct original filename, we can initialize
2304 (*debug_hooks->init) (name);
2306 timevar_pop (TV_SYMOUT);
2312 /* Reinitialize everything when target parameters, such as register usage,
2315 target_reinit (void)
2317 /* Reinitialize RTL backend. */
2318 backend_init_target ();
2320 /* Reinitialize lang-dependent parts. */
2321 lang_dependent_init_target ();
2325 dump_memory_report (bool final)
2327 ggc_print_statistics ();
2328 stringpool_statistics ();
2329 dump_tree_statistics ();
2330 dump_gimple_statistics ();
2331 dump_rtx_statistics ();
2332 dump_alloc_pool_statistics ();
2333 dump_bitmap_statistics ();
2334 dump_vec_loc_statistics ();
2335 dump_ggc_loc_statistics (final);
2336 dump_alias_stats (stderr);
2337 dump_pta_stats (stderr);
2340 /* Clean up: close opened files, etc. */
2345 /* Close the dump files. */
2346 if (flag_gen_aux_info)
2348 fclose (aux_info_file);
2350 unlink (aux_info_file_name);
2353 /* Close non-debugging input and output files. Take special care to note
2354 whether fclose returns an error, since the pages might still be on the
2355 buffer chain while the file is open. */
2359 if (ferror (asm_out_file) != 0)
2360 fatal_error ("error writing to %s: %m", asm_file_name);
2361 if (fclose (asm_out_file) != 0)
2362 fatal_error ("error closing %s: %m", asm_file_name);
2364 unlink_if_ordinary (asm_file_name);
2368 finish_optimization_passes ();
2373 dump_memory_report (true);
2375 /* Language-specific end of compilation actions. */
2376 lang_hooks.finish ();
2379 /* Initialize the compiler, and compile the input file. */
2383 /* Initialize timing first. The C front ends read the main file in
2384 the post_options hook, and C++ does file timings. */
2385 if (time_report || !quiet_flag || flag_detailed_statistics)
2387 timevar_start (TV_TOTAL);
2391 /* Don't do any more if an error has already occurred. */
2394 /* This must be run always, because it is needed to compute the FP
2395 predefined macros, such as __LDBL_MAX__, for targets using non
2396 default FP formats. */
2397 init_adjust_machine_modes ();
2399 /* Set up the back-end if requested. */
2403 /* Language-dependent initialization. Returns true on success. */
2404 if (lang_dependent_init (main_input_filename))
2410 /* Stop timing and print the times. */
2411 timevar_stop (TV_TOTAL);
2412 timevar_print (stderr);
2415 /* Entry point of cc1, cc1plus, jc1, f771, etc.
2416 Exit code is FATAL_EXIT_CODE if can't open files or if there were
2417 any errors, or SUCCESS_EXIT_CODE if compilation succeeded.
2419 It is not safe to call this function more than once. */
2422 toplev_main (int argc, char **argv)
2424 expandargv (&argc, &argv);
2426 save_argv = CONST_CAST2 (const char **, char **, argv);
2428 /* Initialization of GCC's environment, and diagnostics. */
2429 general_init (argv[0]);
2431 /* Parse the options and do minimal processing; basically just
2432 enough to default flags appropriately. */
2433 decode_options (argc, CONST_CAST2 (const char **, char **, argv));
2437 initialize_plugins ();
2440 print_version (stderr, "");
2443 print_plugins_help (stderr, "");
2445 /* Exit early if we can (e.g. -help). */
2446 if (!exit_after_options)
2449 if (warningcount || errorcount)
2450 print_ignored_options ();
2451 diagnostic_finish (global_dc);
2453 /* Invoke registered plugin callbacks if any. */
2454 invoke_plugin_callbacks (PLUGIN_FINISH, NULL);
2456 finalize_plugins ();
2457 if (errorcount || sorrycount)
2458 return (FATAL_EXIT_CODE);
2460 return (SUCCESS_EXIT_CODE);