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
4 Free Software Foundation, Inc.
6 This file is part of GCC.
8 GCC is free software; you can redistribute it and/or modify it under
9 the terms of the GNU General Public License as published by the Free
10 Software Foundation; either version 3, or (at your option) any later
13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING3. If not see
20 <http://www.gnu.org/licenses/>. */
22 /* This is the top level of cc1/c++.
23 It parses command args, opens files, invokes the various passes
24 in the proper order, and counts the time used by each.
25 Error messages and low-level interface to malloc also handled here. */
28 #undef FLOAT /* This is for hpux. They should change hpux. */
29 #undef FFS /* Some systems define this in param.h. */
31 #include "coretypes.h"
35 #ifdef HAVE_SYS_RESOURCE_H
36 # include <sys/resource.h>
39 #ifdef HAVE_SYS_TIMES_H
40 # include <sys/times.h>
50 #include "insn-attr.h"
51 #include "insn-config.h"
52 #include "insn-flags.h"
53 #include "hard-reg-set.h"
60 #include "basic-block.h"
66 #include "diagnostic.h"
70 #include "dwarf2asm.h"
71 #include "integrate.h"
75 #include "langhooks.h"
76 #include "cfglayout.h"
78 #include "hosthooks.h"
82 #include "value-prof.h"
83 #include "alloc-pool.h"
84 #include "tree-mudflap.h"
85 #include "tree-pass.h"
87 #include "tree-ssa-alias.h"
90 #if defined (DWARF2_UNWIND_INFO) || defined (DWARF2_DEBUGGING_INFO)
91 #include "dwarf2out.h"
94 #if defined(DBX_DEBUGGING_INFO) || defined(XCOFF_DEBUGGING_INFO)
98 #ifdef SDB_DEBUGGING_INFO
102 #ifdef XCOFF_DEBUGGING_INFO
103 #include "xcoffout.h" /* Needed for external data
104 declarations for e.g. AIX 4.x. */
107 static void general_init (const char *);
108 static void do_compile (void);
109 static void process_options (void);
110 static void backend_init (void);
111 static int lang_dependent_init (const char *);
112 static void init_asm_output (const char *);
113 static void finalize (void);
115 static void crash_signal (int) ATTRIBUTE_NORETURN;
116 static void setup_core_dumping (void);
117 static void compile_file (void);
119 /* Nonzero to dump debug info whilst parsing (-dy option). */
120 static int set_yydebug;
122 /* True if we don't need a backend (e.g. preprocessing only). */
123 static bool no_backend;
125 /* Length of line when printing switch values. */
128 /* Name of program invoked, sans directories. */
130 const char *progname;
132 /* Copy of argument vector to toplev_main. */
133 static const char **save_argv;
135 /* Name of top-level original source file (what was input to cpp).
136 This comes from the #-command at the beginning of the actual input.
137 If there isn't any there, then this is the cc1 input file name. */
139 const char *main_input_filename;
141 /* Used to enable -fvar-tracking, -fweb and -frename-registers according
142 to optimize and default_debug_hooks in process_options (). */
143 #define AUTODETECT_VALUE 2
145 /* Current position in real source file. */
147 location_t input_location;
149 struct line_maps *line_table;
151 /* Name to use as base of names for dump output files. */
153 const char *dump_base_name;
155 /* Name to use as a base for auxiliary output files. */
157 const char *aux_base_name;
159 /* Prefix for profile data files */
160 const char *profile_data_prefix;
162 /* A mask of target_flags that includes bit X if X was set or cleared
163 on the command line. */
165 int target_flags_explicit;
167 /* Debug hooks - dependent upon command line options. */
169 const struct gcc_debug_hooks *debug_hooks;
171 /* Debug hooks - target default. */
173 static const struct gcc_debug_hooks *default_debug_hooks;
175 /* Other flags saying which kinds of debugging dump have been requested. */
177 int rtl_dump_and_exit;
178 int flag_print_asm_name;
179 enum graph_dump_types graph_dump_format;
181 /* Name for output file of assembly code, specified with -o. */
183 const char *asm_file_name;
185 /* Nonzero means do optimizations. -O.
186 Particular numeric values stand for particular amounts of optimization;
187 thus, -O2 stores 2 here. However, the optimizations beyond the basic
188 ones are not controlled directly by this variable. Instead, they are
189 controlled by individual `flag_...' variables that are defaulted
190 based on this variable. */
194 /* Nonzero means optimize for size. -Os.
195 The only valid values are zero and nonzero. When optimize_size is
196 nonzero, optimize defaults to 2, but certain individual code
197 bloating optimizations are disabled. */
199 int optimize_size = 0;
201 /* 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)
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 varpool_assemble_pending_decls ();
1067 finish_aliases_2 ();
1069 /* Likewise for mudflap static object registrations. */
1071 mudflap_finish_file ();
1073 /* Likewise for emulated thread-local storage. */
1074 if (!targetm.have_tls)
1077 output_shared_constant_pool ();
1078 output_object_blocks ();
1080 /* Write out any pending weak symbol declarations. */
1083 /* Do dbx symbols. */
1084 timevar_push (TV_SYMOUT);
1086 #if defined DWARF2_DEBUGGING_INFO || defined DWARF2_UNWIND_INFO
1087 if (dwarf2out_do_frame ())
1088 dwarf2out_frame_finish ();
1091 (*debug_hooks->finish) (main_input_filename);
1092 timevar_pop (TV_SYMOUT);
1094 /* Output some stuff at end of file if nec. */
1096 dw2_output_indirect_constants ();
1098 /* Flush any pending external directives. */
1099 process_pending_assemble_externals ();
1101 /* Emit LTO marker if LTO info has been previously emitted. This is
1102 used by collect2 to determine whether an object file contains IL.
1103 We used to emit an undefined reference here, but this produces
1104 link errors if an object file with IL is stored into a shared
1105 library without invoking lto1. */
1106 if (flag_generate_lto)
1107 fprintf (asm_out_file,"\t.comm\tgnu_lto_v1,1,1\n");
1109 /* Attach a special .ident directive to the end of the file to identify
1110 the version of GCC which compiled this code. The format of the .ident
1111 string is patterned after the ones produced by native SVR4 compilers. */
1115 const char *pkg_version = "(GNU) ";
1117 if (strcmp ("(GCC) ", pkgversion_string))
1118 pkg_version = pkgversion_string;
1119 fprintf (asm_out_file, "%s\"GCC: %s%s\"\n",
1120 IDENT_ASM_OP, pkg_version, version_string);
1124 /* Invoke registered plugin callbacks. */
1125 invoke_plugin_callbacks (PLUGIN_FINISH_UNIT, NULL);
1127 /* This must be at the end. Some target ports emit end of file directives
1128 into the assembly file here, and hence we can not output anything to the
1129 assembly file after this point. */
1130 targetm.asm_out.file_end ();
1133 /* Parse a -d... command line switch. */
1136 decode_d_option (const char *arg)
1147 flag_print_asm_name = 1;
1150 flag_dump_rtl_in_asm = 1;
1151 flag_print_asm_name = 1;
1154 graph_dump_format = vcg;
1157 rtl_dump_and_exit = 1;
1162 case 'D': /* These are handled by the preprocessor. */
1169 setup_core_dumping();
1172 enable_rtl_dump_file ();
1176 warning (0, "unrecognized gcc debugging option: %c", c);
1181 /* Indexed by enum debug_info_type. */
1182 const char *const debug_type_names[] =
1184 "none", "stabs", "coff", "dwarf-2", "xcoff", "vms"
1187 /* Print version information to FILE.
1188 Each line begins with INDENT (for the case where FILE is the
1189 assembler output file). */
1192 print_version (FILE *file, const char *indent)
1194 static const char fmt1[] =
1196 N_("%s%s%s %sversion %s (%s)\n%s\tcompiled by GNU C version %s, ")
1198 N_("%s%s%s %sversion %s (%s) compiled by CC, ")
1202 static const char fmt2[] =
1203 N_("GMP version %s, MPFR version %s, MPC version %s\n");
1205 static const char fmt2[] =
1206 N_("GMP version %s, MPFR version %s\n");
1208 static const char fmt3[] =
1209 N_("%s%swarning: %s header version %s differs from library version %s.\n");
1210 static const char fmt4[] =
1211 N_("%s%sGGC heuristics: --param ggc-min-expand=%d --param ggc-min-heapsize=%d\n");
1213 #define __VERSION__ "[?]"
1216 file == stderr ? _(fmt1) : fmt1,
1217 indent, *indent != 0 ? " " : "",
1218 lang_hooks.name, pkgversion_string, version_string, TARGET_NAME,
1219 indent, __VERSION__);
1221 /* We need to stringify the GMP macro values. Ugh, gmp_version has
1222 two string formats, "i.j.k" and "i.j" when k is zero. As of
1223 gmp-4.3.0, GMP always uses the 3 number format. */
1224 #define GCC_GMP_STRINGIFY_VERSION3(X) #X
1225 #define GCC_GMP_STRINGIFY_VERSION2(X) GCC_GMP_STRINGIFY_VERSION3(X)
1226 #define GCC_GMP_VERSION_NUM(X,Y,Z) (((X) << 16L) | ((Y) << 8) | (Z))
1227 #define GCC_GMP_VERSION \
1228 GCC_GMP_VERSION_NUM(__GNU_MP_VERSION, __GNU_MP_VERSION_MINOR, __GNU_MP_VERSION_PATCHLEVEL)
1229 #if GCC_GMP_VERSION < GCC_GMP_VERSION_NUM(4,3,0) && __GNU_MP_VERSION_PATCHLEVEL == 0
1230 #define GCC_GMP_STRINGIFY_VERSION GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION) "." \
1231 GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION_MINOR)
1233 #define GCC_GMP_STRINGIFY_VERSION GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION) "." \
1234 GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION_MINOR) "." \
1235 GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION_PATCHLEVEL)
1238 file == stderr ? _(fmt2) : fmt2,
1239 GCC_GMP_STRINGIFY_VERSION, MPFR_VERSION_STRING
1241 , MPC_VERSION_STRING
1244 if (strcmp (GCC_GMP_STRINGIFY_VERSION, gmp_version))
1246 file == stderr ? _(fmt3) : fmt3,
1247 indent, *indent != 0 ? " " : "",
1248 "GMP", GCC_GMP_STRINGIFY_VERSION, gmp_version);
1249 if (strcmp (MPFR_VERSION_STRING, mpfr_get_version ()))
1251 file == stderr ? _(fmt3) : fmt3,
1252 indent, *indent != 0 ? " " : "",
1253 "MPFR", MPFR_VERSION_STRING, mpfr_get_version ());
1255 if (strcmp (MPC_VERSION_STRING, mpc_get_version ()))
1257 file == stderr ? _(fmt3) : fmt3,
1258 indent, *indent != 0 ? " " : "",
1259 "MPC", MPC_VERSION_STRING, mpc_get_version ());
1262 file == stderr ? _(fmt4) : fmt4,
1263 indent, *indent != 0 ? " " : "",
1264 PARAM_VALUE (GGC_MIN_EXPAND), PARAM_VALUE (GGC_MIN_HEAPSIZE));
1266 print_plugins_versions (file, indent);
1269 #ifdef ASM_COMMENT_START
1271 print_to_asm_out_file (print_switch_type type, const char * text)
1273 bool prepend_sep = true;
1277 case SWITCH_TYPE_LINE_END:
1278 putc ('\n', asm_out_file);
1281 case SWITCH_TYPE_LINE_START:
1282 fputs (ASM_COMMENT_START, asm_out_file);
1283 return strlen (ASM_COMMENT_START);
1285 case SWITCH_TYPE_DESCRIPTIVE:
1286 if (ASM_COMMENT_START[0] == 0)
1287 prepend_sep = false;
1289 case SWITCH_TYPE_PASSED:
1290 case SWITCH_TYPE_ENABLED:
1292 fputc (' ', asm_out_file);
1293 fputs (text, asm_out_file);
1294 /* No need to return the length here as
1295 print_single_switch has already done it. */
1305 print_to_stderr (print_switch_type type, const char * text)
1309 case SWITCH_TYPE_LINE_END:
1310 putc ('\n', stderr);
1313 case SWITCH_TYPE_LINE_START:
1316 case SWITCH_TYPE_PASSED:
1317 case SWITCH_TYPE_ENABLED:
1318 fputc (' ', stderr);
1321 case SWITCH_TYPE_DESCRIPTIVE:
1322 fputs (text, stderr);
1323 /* No need to return the length here as
1324 print_single_switch has already done it. */
1332 /* Print an option value and return the adjusted position in the line.
1333 ??? print_fn doesn't handle errors, eg disk full; presumably other
1334 code will catch a disk full though. */
1337 print_single_switch (print_switch_fn_type print_fn,
1339 print_switch_type type,
1342 /* The ultrix fprintf returns 0 on success, so compute the result
1343 we want here since we need it for the following test. The +1
1344 is for the separator character that will probably be emitted. */
1345 int len = strlen (text) + 1;
1348 && pos + len > MAX_LINE)
1350 print_fn (SWITCH_TYPE_LINE_END, NULL);
1355 pos += print_fn (SWITCH_TYPE_LINE_START, NULL);
1357 print_fn (type, text);
1361 /* Print active target switches using PRINT_FN.
1362 POS is the current cursor position and MAX is the size of a "line".
1363 Each line begins with INDENT and ends with TERM.
1364 Each switch is separated from the next by SEP. */
1367 print_switch_values (print_switch_fn_type print_fn)
1373 /* Fill in the -frandom-seed option, if the user didn't pass it, so
1374 that it can be printed below. This helps reproducibility. */
1375 if (!flag_random_seed)
1376 init_random_seed ();
1378 /* Print the options as passed. */
1379 pos = print_single_switch (print_fn, pos,
1380 SWITCH_TYPE_DESCRIPTIVE, _("options passed: "));
1382 for (p = &save_argv[1]; *p != NULL; p++)
1387 if (strcmp (*p, "-o") == 0
1388 || strcmp (*p, "-dumpbase") == 0
1389 || strcmp (*p, "-auxbase") == 0)
1396 if (strcmp (*p, "-quiet") == 0
1397 || strcmp (*p, "-version") == 0)
1404 pos = print_single_switch (print_fn, pos, SWITCH_TYPE_PASSED, *p);
1408 print_fn (SWITCH_TYPE_LINE_END, NULL);
1410 /* Print the -f and -m options that have been enabled.
1411 We don't handle language specific options but printing argv
1413 pos = print_single_switch (print_fn, 0,
1414 SWITCH_TYPE_DESCRIPTIVE, _("options enabled: "));
1416 for (j = 0; j < cl_options_count; j++)
1417 if ((cl_options[j].flags & CL_REPORT)
1418 && option_enabled (j) > 0)
1419 pos = print_single_switch (print_fn, pos,
1420 SWITCH_TYPE_ENABLED, cl_options[j].opt_text);
1422 print_fn (SWITCH_TYPE_LINE_END, NULL);
1425 /* Open assembly code output file. Do this even if -fsyntax-only is
1426 on, because then the driver will have provided the name of a
1427 temporary file or bit bucket for us. NAME is the file specified on
1428 the command line, possibly NULL. */
1430 init_asm_output (const char *name)
1432 if (name == NULL && asm_file_name == 0)
1433 asm_out_file = stdout;
1436 if (asm_file_name == 0)
1438 int len = strlen (dump_base_name);
1439 char *dumpname = XNEWVEC (char, len + 6);
1441 memcpy (dumpname, dump_base_name, len + 1);
1442 strip_off_ending (dumpname, len);
1443 strcat (dumpname, ".s");
1444 asm_file_name = dumpname;
1446 if (!strcmp (asm_file_name, "-"))
1447 asm_out_file = stdout;
1449 asm_out_file = fopen (asm_file_name, "w+b");
1450 if (asm_out_file == 0)
1451 fatal_error ("can%'t open %s for writing: %m", asm_file_name);
1454 if (!flag_syntax_only)
1456 targetm.asm_out.file_start ();
1458 if (flag_record_gcc_switches)
1460 if (targetm.asm_out.record_gcc_switches)
1462 /* Let the target know that we are about to start recording. */
1463 targetm.asm_out.record_gcc_switches (SWITCH_TYPE_DESCRIPTIVE,
1465 /* Now record the switches. */
1466 print_switch_values (targetm.asm_out.record_gcc_switches);
1467 /* Let the target know that the recording is over. */
1468 targetm.asm_out.record_gcc_switches (SWITCH_TYPE_DESCRIPTIVE,
1472 inform (input_location, "-frecord-gcc-switches is not supported by the current target");
1475 #ifdef ASM_COMMENT_START
1476 if (flag_verbose_asm)
1478 /* Print the list of switches in effect
1479 into the assembler file as comments. */
1480 print_version (asm_out_file, ASM_COMMENT_START);
1481 print_switch_values (print_to_asm_out_file);
1482 putc ('\n', asm_out_file);
1488 /* Return true if the state of option OPTION should be stored in PCH files
1489 and checked by default_pch_valid_p. Store the option's current state
1493 option_affects_pch_p (int option, struct cl_option_state *state)
1495 if ((cl_options[option].flags & CL_TARGET) == 0)
1497 if (cl_options[option].flag_var == &target_flags)
1498 if (targetm.check_pch_target_flags)
1500 return get_option_state (option, state);
1503 /* Default version of get_pch_validity.
1504 By default, every flag difference is fatal; that will be mostly right for
1505 most targets, but completely right for very few. */
1508 default_get_pch_validity (size_t *len)
1510 struct cl_option_state state;
1515 if (targetm.check_pch_target_flags)
1516 *len += sizeof (target_flags);
1517 for (i = 0; i < cl_options_count; i++)
1518 if (option_affects_pch_p (i, &state))
1521 result = r = XNEWVEC (char, *len);
1525 if (targetm.check_pch_target_flags)
1527 memcpy (r, &target_flags, sizeof (target_flags));
1528 r += sizeof (target_flags);
1531 for (i = 0; i < cl_options_count; i++)
1532 if (option_affects_pch_p (i, &state))
1534 memcpy (r, state.data, state.size);
1541 /* Return a message which says that a PCH file was created with a different
1542 setting of OPTION. */
1545 pch_option_mismatch (const char *option)
1549 asprintf (&r, _("created and used with differing settings of '%s'"), option);
1551 return _("out of memory");
1555 /* Default version of pch_valid_p. */
1558 default_pch_valid_p (const void *data_p, size_t len)
1560 struct cl_option_state state;
1561 const char *data = (const char *)data_p;
1564 /* -fpic and -fpie also usually make a PCH invalid. */
1565 if (data[0] != flag_pic)
1566 return _("created and used with different settings of -fpic");
1567 if (data[1] != flag_pie)
1568 return _("created and used with different settings of -fpie");
1571 /* Check target_flags. */
1572 if (targetm.check_pch_target_flags)
1577 memcpy (&tf, data, sizeof (target_flags));
1578 data += sizeof (target_flags);
1579 len -= sizeof (target_flags);
1580 r = targetm.check_pch_target_flags (tf);
1585 for (i = 0; i < cl_options_count; i++)
1586 if (option_affects_pch_p (i, &state))
1588 if (memcmp (data, state.data, state.size) != 0)
1589 return pch_option_mismatch (cl_options[i].opt_text);
1597 /* Default tree printer. Handles declarations only. */
1599 default_tree_printer (pretty_printer *pp, text_info *text, const char *spec,
1600 int precision, bool wide, bool set_locus, bool hash)
1604 /* FUTURE: %+x should set the locus. */
1605 if (precision != 0 || wide || hash)
1611 t = va_arg (*text->args_ptr, tree);
1612 if (TREE_CODE (t) == IDENTIFIER_NODE)
1614 pp_identifier (pp, IDENTIFIER_POINTER (t));
1620 t = va_arg (*text->args_ptr, tree);
1621 if (DECL_DEBUG_EXPR_IS_FROM (t) && DECL_DEBUG_EXPR (t))
1622 t = DECL_DEBUG_EXPR (t);
1627 t = va_arg (*text->args_ptr, tree);
1634 if (set_locus && text->locus)
1635 *text->locus = DECL_SOURCE_LOCATION (t);
1639 const char *n = DECL_NAME (t)
1640 ? identifier_to_locale (lang_hooks.decl_printable_name (t, 2))
1645 dump_generic_node (pp, t, 0, TDF_DIAGNOSTIC, 0);
1650 /* A helper function; used as the reallocator function for cpp's line
1653 realloc_for_line_map (void *ptr, size_t len)
1655 return ggc_realloc (ptr, len);
1658 /* Initialization of the front end environment, before command line
1659 options are parsed. Signal handlers, internationalization etc.
1660 ARGV0 is main's argv[0]. */
1662 general_init (const char *argv0)
1666 p = argv0 + strlen (argv0);
1667 while (p != argv0 && !IS_DIR_SEPARATOR (p[-1]))
1671 xmalloc_set_program_name (progname);
1675 /* Unlock the stdio streams. */
1676 unlock_std_streams ();
1678 gcc_init_libintl ();
1680 /* Initialize the diagnostics reporting machinery, so option parsing
1681 can give warnings and errors. */
1682 diagnostic_initialize (global_dc);
1683 /* Set a default printer. Language specific initializations will
1684 override it later. */
1685 pp_format_decoder (global_dc->printer) = &default_tree_printer;
1687 /* Trap fatal signals, e.g. SIGSEGV, and convert them to ICE messages. */
1689 signal (SIGSEGV, crash_signal);
1692 signal (SIGILL, crash_signal);
1695 signal (SIGBUS, crash_signal);
1698 signal (SIGABRT, crash_signal);
1700 #if defined SIGIOT && (!defined SIGABRT || SIGABRT != SIGIOT)
1701 signal (SIGIOT, crash_signal);
1704 signal (SIGFPE, crash_signal);
1707 /* Other host-specific signal setup. */
1708 (*host_hooks.extra_signals)();
1710 /* Initialize the garbage-collector, string pools and tree type hash
1714 line_table = GGC_NEW (struct line_maps);
1715 linemap_init (line_table);
1716 line_table->reallocator = realloc_for_line_map;
1719 /* Initialize register usage now so switches may override. */
1722 /* Register the language-independent parameters. */
1723 add_params (lang_independent_params, LAST_PARAM);
1725 /* This must be done after add_params but before argument processing. */
1726 init_ggc_heuristics();
1727 init_optimization_passes ();
1728 statistics_early_init ();
1731 /* Return true if the current target supports -fsection-anchors. */
1734 target_supports_section_anchors_p (void)
1736 if (targetm.min_anchor_offset == 0 && targetm.max_anchor_offset == 0)
1739 if (targetm.asm_out.output_anchor == NULL)
1745 /* Default the align_* variables to 1 if they're still unset, and
1746 set up the align_*_log variables. */
1748 init_alignments (void)
1750 if (align_loops <= 0)
1752 if (align_loops_max_skip > align_loops)
1753 align_loops_max_skip = align_loops - 1;
1754 align_loops_log = floor_log2 (align_loops * 2 - 1);
1755 if (align_jumps <= 0)
1757 if (align_jumps_max_skip > align_jumps)
1758 align_jumps_max_skip = align_jumps - 1;
1759 align_jumps_log = floor_log2 (align_jumps * 2 - 1);
1760 if (align_labels <= 0)
1762 align_labels_log = floor_log2 (align_labels * 2 - 1);
1763 if (align_labels_max_skip > align_labels)
1764 align_labels_max_skip = align_labels - 1;
1765 if (align_functions <= 0)
1766 align_functions = 1;
1767 align_functions_log = floor_log2 (align_functions * 2 - 1);
1770 /* Process the options that have been parsed. */
1772 process_options (void)
1774 /* Just in case lang_hooks.post_options ends up calling a debug_hook.
1775 This can happen with incorrect pre-processed input. */
1776 debug_hooks = &do_nothing_debug_hooks;
1778 /* This replaces set_Wunused. */
1779 if (warn_unused_function == -1)
1780 warn_unused_function = warn_unused;
1781 if (warn_unused_label == -1)
1782 warn_unused_label = warn_unused;
1783 /* Wunused-parameter is enabled if both -Wunused -Wextra are enabled. */
1784 if (warn_unused_parameter == -1)
1785 warn_unused_parameter = (warn_unused && extra_warnings);
1786 if (warn_unused_variable == -1)
1787 warn_unused_variable = warn_unused;
1788 if (warn_unused_value == -1)
1789 warn_unused_value = warn_unused;
1791 /* This replaces set_Wextra. */
1792 if (warn_uninitialized == -1)
1793 warn_uninitialized = extra_warnings;
1795 /* Allow the front end to perform consistency checks and do further
1796 initialization based on the command line options. This hook also
1797 sets the original filename if appropriate (e.g. foo.i -> foo.c)
1798 so we can correctly initialize debug output. */
1799 no_backend = lang_hooks.post_options (&main_input_filename);
1801 #ifdef OVERRIDE_OPTIONS
1802 /* Some machines may reject certain combinations of options. */
1806 if (flag_section_anchors && !target_supports_section_anchors_p ())
1808 warning (OPT_fsection_anchors,
1809 "this target does not support %qs", "-fsection-anchors");
1810 flag_section_anchors = 0;
1813 if (flag_short_enums == 2)
1814 flag_short_enums = targetm.default_short_enums ();
1816 /* Set aux_base_name if not already set. */
1819 else if (main_input_filename)
1821 char *name = xstrdup (lbasename (main_input_filename));
1823 strip_off_ending (name, strlen (name));
1824 aux_base_name = name;
1827 aux_base_name = "gccaux";
1832 || flag_loop_interchange
1833 || flag_loop_strip_mine
1834 || flag_graphite_identity
1835 || flag_loop_parallelize_all)
1836 sorry ("Graphite loop optimizations cannot be used");
1839 /* Unrolling all loops implies that standard loop unrolling must also
1841 if (flag_unroll_all_loops)
1842 flag_unroll_loops = 1;
1844 /* The loop unrolling code assumes that cse will be run after loop.
1845 web and rename-registers also help when run after loop unrolling. */
1846 if (flag_rerun_cse_after_loop == AUTODETECT_VALUE)
1847 flag_rerun_cse_after_loop = flag_unroll_loops || flag_peel_loops;
1849 if (flag_web == AUTODETECT_VALUE)
1850 flag_web = flag_unroll_loops || flag_peel_loops;
1852 if (flag_rename_registers == AUTODETECT_VALUE)
1853 flag_rename_registers = flag_unroll_loops || flag_peel_loops;
1855 if (flag_non_call_exceptions)
1856 flag_asynchronous_unwind_tables = 1;
1857 if (flag_asynchronous_unwind_tables)
1858 flag_unwind_tables = 1;
1860 if (flag_value_profile_transformations)
1861 flag_profile_values = 1;
1863 /* Warn about options that are not supported on this machine. */
1864 #ifndef INSN_SCHEDULING
1865 if (flag_schedule_insns || flag_schedule_insns_after_reload)
1866 warning (0, "instruction scheduling not supported on this target machine");
1869 if (flag_delayed_branch)
1870 warning (0, "this target machine does not have delayed branches");
1873 user_label_prefix = USER_LABEL_PREFIX;
1874 if (flag_leading_underscore != -1)
1876 /* If the default prefix is more complicated than "" or "_",
1877 issue a warning and ignore this option. */
1878 if (user_label_prefix[0] == 0 ||
1879 (user_label_prefix[0] == '_' && user_label_prefix[1] == 0))
1881 user_label_prefix = flag_leading_underscore ? "_" : "";
1884 warning (0, "-f%sleading-underscore not supported on this target machine",
1885 flag_leading_underscore ? "" : "no-");
1888 /* If we are in verbose mode, write out the version and maybe all the
1889 option flags in use. */
1892 print_version (stderr, "");
1894 print_switch_values (print_to_stderr);
1897 if (flag_syntax_only)
1899 write_symbols = NO_DEBUG;
1905 if (debug_info_level == DINFO_LEVEL_NONE)
1907 debug_info_level = DINFO_LEVEL_NORMAL;
1909 if (write_symbols == NO_DEBUG)
1910 write_symbols = PREFERRED_DEBUGGING_TYPE;
1913 debug_info_level = DINFO_LEVEL_NONE;
1916 if (flag_dump_final_insns && !flag_syntax_only && !no_backend)
1918 FILE *final_output = fopen (flag_dump_final_insns, "w");
1921 error ("could not open final insn dump file %qs: %s",
1922 flag_dump_final_insns, strerror (errno));
1923 flag_dump_final_insns = NULL;
1925 else if (fclose (final_output))
1927 error ("could not close zeroed insn dump file %qs: %s",
1928 flag_dump_final_insns, strerror (errno));
1929 flag_dump_final_insns = NULL;
1933 /* Unless over-ridden for the target, assume that all DWARF levels
1934 may be emitted, if DWARF2_DEBUG is selected. */
1935 if (dwarf_strict < 0)
1938 /* A lot of code assumes write_symbols == NO_DEBUG if the debugging
1940 if (debug_info_level == DINFO_LEVEL_NONE)
1941 write_symbols = NO_DEBUG;
1943 /* Now we know write_symbols, set up the debug hooks based on it.
1944 By default we do nothing for debug output. */
1945 if (PREFERRED_DEBUGGING_TYPE == NO_DEBUG)
1946 default_debug_hooks = &do_nothing_debug_hooks;
1947 #if defined(DBX_DEBUGGING_INFO)
1948 else if (PREFERRED_DEBUGGING_TYPE == DBX_DEBUG)
1949 default_debug_hooks = &dbx_debug_hooks;
1951 #if defined(XCOFF_DEBUGGING_INFO)
1952 else if (PREFERRED_DEBUGGING_TYPE == XCOFF_DEBUG)
1953 default_debug_hooks = &xcoff_debug_hooks;
1955 #ifdef SDB_DEBUGGING_INFO
1956 else if (PREFERRED_DEBUGGING_TYPE == SDB_DEBUG)
1957 default_debug_hooks = &sdb_debug_hooks;
1959 #ifdef DWARF2_DEBUGGING_INFO
1960 else if (PREFERRED_DEBUGGING_TYPE == DWARF2_DEBUG)
1961 default_debug_hooks = &dwarf2_debug_hooks;
1963 #ifdef VMS_DEBUGGING_INFO
1964 else if (PREFERRED_DEBUGGING_TYPE == VMS_DEBUG
1965 || PREFERRED_DEBUGGING_TYPE == VMS_AND_DWARF2_DEBUG)
1966 default_debug_hooks = &vmsdbg_debug_hooks;
1969 if (write_symbols == NO_DEBUG)
1971 #if defined(DBX_DEBUGGING_INFO)
1972 else if (write_symbols == DBX_DEBUG)
1973 debug_hooks = &dbx_debug_hooks;
1975 #if defined(XCOFF_DEBUGGING_INFO)
1976 else if (write_symbols == XCOFF_DEBUG)
1977 debug_hooks = &xcoff_debug_hooks;
1979 #ifdef SDB_DEBUGGING_INFO
1980 else if (write_symbols == SDB_DEBUG)
1981 debug_hooks = &sdb_debug_hooks;
1983 #ifdef DWARF2_DEBUGGING_INFO
1984 else if (write_symbols == DWARF2_DEBUG)
1985 debug_hooks = &dwarf2_debug_hooks;
1987 #ifdef VMS_DEBUGGING_INFO
1988 else if (write_symbols == VMS_DEBUG || write_symbols == VMS_AND_DWARF2_DEBUG)
1989 debug_hooks = &vmsdbg_debug_hooks;
1992 error ("target system does not support the \"%s\" debug format",
1993 debug_type_names[write_symbols]);
1995 /* We know which debug output will be used so we can set flag_var_tracking
1996 and flag_var_tracking_uninit if the user has not specified them. */
1997 if (debug_info_level < DINFO_LEVEL_NORMAL
1998 || debug_hooks->var_location == do_nothing_debug_hooks.var_location)
2000 if (flag_var_tracking == 1
2001 || flag_var_tracking_uninit == 1)
2003 if (debug_info_level < DINFO_LEVEL_NORMAL)
2004 warning (0, "variable tracking requested, but useless unless "
2005 "producing debug info");
2007 warning (0, "variable tracking requested, but not supported "
2008 "by this debug format");
2010 flag_var_tracking = 0;
2011 flag_var_tracking_uninit = 0;
2014 /* If the user specifically requested variable tracking with tagging
2015 uninitialized variables, we need to turn on variable tracking.
2016 (We already determined above that variable tracking is feasible.) */
2017 if (flag_var_tracking_uninit)
2018 flag_var_tracking = 1;
2020 if (flag_var_tracking == AUTODETECT_VALUE)
2021 flag_var_tracking = optimize >= 1;
2023 if (flag_var_tracking_assignments == AUTODETECT_VALUE)
2024 flag_var_tracking_assignments = flag_var_tracking
2025 && !(flag_selective_scheduling || flag_selective_scheduling2);
2027 if (flag_var_tracking_assignments_toggle)
2028 flag_var_tracking_assignments = !flag_var_tracking_assignments;
2030 if (flag_var_tracking_assignments && !flag_var_tracking)
2031 flag_var_tracking = flag_var_tracking_assignments = -1;
2033 if (flag_var_tracking_assignments
2034 && (flag_selective_scheduling || flag_selective_scheduling2))
2035 warning (0, "var-tracking-assignments changes selective scheduling");
2037 if (flag_tree_cselim == AUTODETECT_VALUE)
2038 #ifdef HAVE_conditional_move
2039 flag_tree_cselim = 1;
2041 flag_tree_cselim = 0;
2044 /* If auxiliary info generation is desired, open the output file.
2045 This goes in the same directory as the source file--unlike
2046 all the other output files. */
2047 if (flag_gen_aux_info)
2049 aux_info_file = fopen (aux_info_file_name, "w");
2050 if (aux_info_file == 0)
2051 fatal_error ("can%'t open %s: %m", aux_info_file_name);
2054 if (! targetm.have_named_sections)
2056 if (flag_function_sections)
2058 warning (0, "-ffunction-sections not supported for this target");
2059 flag_function_sections = 0;
2061 if (flag_data_sections)
2063 warning (0, "-fdata-sections not supported for this target");
2064 flag_data_sections = 0;
2068 if (flag_function_sections && profile_flag)
2070 warning (0, "-ffunction-sections disabled; it makes profiling impossible");
2071 flag_function_sections = 0;
2074 #ifndef HAVE_prefetch
2075 if (flag_prefetch_loop_arrays)
2077 warning (0, "-fprefetch-loop-arrays not supported for this target");
2078 flag_prefetch_loop_arrays = 0;
2081 if (flag_prefetch_loop_arrays && !HAVE_prefetch)
2083 warning (0, "-fprefetch-loop-arrays not supported for this target (try -march switches)");
2084 flag_prefetch_loop_arrays = 0;
2088 /* This combination of options isn't handled for i386 targets and doesn't
2089 make much sense anyway, so don't allow it. */
2090 if (flag_prefetch_loop_arrays && optimize_size)
2092 warning (0, "-fprefetch-loop-arrays is not supported with -Os");
2093 flag_prefetch_loop_arrays = 0;
2096 /* The presence of IEEE signaling NaNs, implies all math can trap. */
2097 if (flag_signaling_nans)
2098 flag_trapping_math = 1;
2100 /* We cannot reassociate if we want traps or signed zeros. */
2101 if (flag_associative_math && (flag_trapping_math || flag_signed_zeros))
2103 warning (0, "-fassociative-math disabled; other options take precedence");
2104 flag_associative_math = 0;
2107 /* With -fcx-limited-range, we do cheap and quick complex arithmetic. */
2108 if (flag_cx_limited_range)
2109 flag_complex_method = 0;
2111 /* With -fcx-fortran-rules, we do something in-between cheap and C99. */
2112 if (flag_cx_fortran_rules)
2113 flag_complex_method = 1;
2115 /* Targets must be able to place spill slots at lower addresses. If the
2116 target already uses a soft frame pointer, the transition is trivial. */
2117 if (!FRAME_GROWS_DOWNWARD && flag_stack_protect)
2119 warning (0, "-fstack-protector not supported for this target");
2120 flag_stack_protect = 0;
2122 if (!flag_stack_protect)
2123 warn_stack_protect = 0;
2125 /* ??? Unwind info is not correct around the CFG unless either a frame
2126 pointer is present or A_O_A is set. Fixing this requires rewriting
2127 unwind info generation to be aware of the CFG and propagating states
2129 if (flag_unwind_tables && !ACCUMULATE_OUTGOING_ARGS
2130 && flag_omit_frame_pointer)
2132 warning (0, "unwind tables currently require a frame pointer "
2134 flag_omit_frame_pointer = 0;
2138 /* This function can be called multiple times to reinitialize the compiler
2139 back end when register classes or instruction sets have changed,
2140 before each function. */
2142 backend_init_target (void)
2144 /* Initialize alignment variables. */
2147 /* This reinitializes hard_frame_pointer, and calls init_reg_modes_target()
2148 to initialize reg_raw_mode[]. */
2151 /* This invokes target hooks to set fixed_reg[] etc, which is
2155 /* This depends on stack_pointer_rtx. */
2156 init_fake_stack_mems ();
2158 /* Sets static_base_value[HARD_FRAME_POINTER_REGNUM], which is
2160 init_alias_target ();
2162 /* Depends on HARD_FRAME_POINTER_REGNUM. */
2165 /* The following initialization functions need to generate rtl, so
2166 provide a dummy function context for them. */
2167 init_dummy_function_start ();
2169 /* rtx_cost is mode-dependent, so cached values need to be recomputed
2170 on a mode change. */
2173 /* We may need to recompute regno_save_code[] and regno_restore_code[]
2174 after a mode change as well. */
2175 if (flag_caller_saves)
2176 init_caller_save ();
2177 expand_dummy_function_end ();
2180 /* Initialize the compiler back end. This function is called only once,
2181 when starting the compiler. */
2188 init_inline_once ();
2189 init_varasm_once ();
2190 save_register_info ();
2192 /* Initialize the target-specific back end pieces. */
2194 backend_init_target ();
2197 /* Initialize excess precision settings. */
2199 init_excess_precision (void)
2201 /* Adjust excess precision handling based on the target options. If
2202 the front end cannot handle it, flag_excess_precision_cmdline
2203 will already have been set accordingly in the post_options
2205 gcc_assert (flag_excess_precision_cmdline != EXCESS_PRECISION_DEFAULT);
2206 flag_excess_precision = flag_excess_precision_cmdline;
2207 if (flag_unsafe_math_optimizations)
2208 flag_excess_precision = EXCESS_PRECISION_FAST;
2209 if (flag_excess_precision == EXCESS_PRECISION_STANDARD)
2211 int flt_eval_method = TARGET_FLT_EVAL_METHOD;
2212 switch (flt_eval_method)
2216 /* Either the target acts unpredictably (-1) or has all the
2217 operations required not to have excess precision (0). */
2218 flag_excess_precision = EXCESS_PRECISION_FAST;
2222 /* In these cases, predictable excess precision makes
2226 /* Any other implementation-defined FLT_EVAL_METHOD values
2227 require the compiler to handle the associated excess
2228 precision rules in excess_precision_type. */
2234 /* Initialize things that are both lang-dependent and target-dependent.
2235 This function can be called more than once if target parameters change. */
2237 lang_dependent_init_target (void)
2239 /* This determines excess precision settings. */
2240 init_excess_precision ();
2242 /* This creates various _DECL nodes, so needs to be called after the
2243 front end is initialized. It also depends on the HAVE_xxx macros
2244 generated from the target machine description. */
2247 /* The following initialization functions need to generate rtl, so
2248 provide a dummy function context for them. */
2249 init_dummy_function_start ();
2251 /* Do the target-specific parts of expr initialization. */
2252 init_expr_target ();
2254 /* Although the actions of these functions are language-independent,
2255 they use optabs, so we cannot call them from backend_init. */
2259 expand_dummy_function_end ();
2262 /* Language-dependent initialization. Returns nonzero on success. */
2264 lang_dependent_init (const char *name)
2266 location_t save_loc = input_location;
2267 if (dump_base_name == 0)
2268 dump_base_name = name && name[0] ? name : "gccdump";
2270 /* Other front-end initialization. */
2271 input_location = BUILTINS_LOCATION;
2272 if (lang_hooks.init () == 0)
2274 input_location = save_loc;
2276 init_asm_output (name);
2278 /* This creates various _DECL nodes, so needs to be called after the
2279 front end is initialized. */
2282 /* Do the target-specific parts of the initialization. */
2283 lang_dependent_init_target ();
2285 /* If dbx symbol table desired, initialize writing it and output the
2286 predefined types. */
2287 timevar_push (TV_SYMOUT);
2289 #if defined DWARF2_DEBUGGING_INFO || defined DWARF2_UNWIND_INFO
2290 if (dwarf2out_do_frame ())
2291 dwarf2out_frame_init ();
2294 /* Now we have the correct original filename, we can initialize
2296 (*debug_hooks->init) (name);
2298 timevar_pop (TV_SYMOUT);
2304 /* Reinitialize everything when target parameters, such as register usage,
2307 target_reinit (void)
2309 /* Reinitialize RTL backend. */
2310 backend_init_target ();
2312 /* Reinitialize lang-dependent parts. */
2313 lang_dependent_init_target ();
2317 dump_memory_report (bool final)
2319 ggc_print_statistics ();
2320 stringpool_statistics ();
2321 dump_tree_statistics ();
2322 dump_gimple_statistics ();
2323 dump_rtx_statistics ();
2324 dump_varray_statistics ();
2325 dump_alloc_pool_statistics ();
2326 dump_bitmap_statistics ();
2327 dump_vec_loc_statistics ();
2328 dump_ggc_loc_statistics (final);
2329 dump_alias_stats (stderr);
2330 dump_pta_stats (stderr);
2333 /* Clean up: close opened files, etc. */
2338 /* Close the dump files. */
2339 if (flag_gen_aux_info)
2341 fclose (aux_info_file);
2343 unlink (aux_info_file_name);
2346 /* Close non-debugging input and output files. Take special care to note
2347 whether fclose returns an error, since the pages might still be on the
2348 buffer chain while the file is open. */
2352 if (ferror (asm_out_file) != 0)
2353 fatal_error ("error writing to %s: %m", asm_file_name);
2354 if (fclose (asm_out_file) != 0)
2355 fatal_error ("error closing %s: %m", asm_file_name);
2357 unlink_if_ordinary (asm_file_name);
2361 finish_optimization_passes ();
2366 dump_memory_report (true);
2368 /* Language-specific end of compilation actions. */
2369 lang_hooks.finish ();
2372 /* Initialize the compiler, and compile the input file. */
2376 /* Initialize timing first. The C front ends read the main file in
2377 the post_options hook, and C++ does file timings. */
2378 if (time_report || !quiet_flag || flag_detailed_statistics)
2380 timevar_start (TV_TOTAL);
2384 /* Don't do any more if an error has already occurred. */
2387 /* This must be run always, because it is needed to compute the FP
2388 predefined macros, such as __LDBL_MAX__, for targets using non
2389 default FP formats. */
2390 init_adjust_machine_modes ();
2392 /* Set up the back-end if requested. */
2396 /* Language-dependent initialization. Returns true on success. */
2397 if (lang_dependent_init (main_input_filename))
2403 /* Stop timing and print the times. */
2404 timevar_stop (TV_TOTAL);
2405 timevar_print (stderr);
2408 /* Entry point of cc1, cc1plus, jc1, f771, etc.
2409 Exit code is FATAL_EXIT_CODE if can't open files or if there were
2410 any errors, or SUCCESS_EXIT_CODE if compilation succeeded.
2412 It is not safe to call this function more than once. */
2415 toplev_main (int argc, char **argv)
2417 expandargv (&argc, &argv);
2419 save_argv = CONST_CAST2 (const char **, char **, argv);
2421 /* Initialization of GCC's environment, and diagnostics. */
2422 general_init (argv[0]);
2424 /* Parse the options and do minimal processing; basically just
2425 enough to default flags appropriately. */
2426 decode_options (argc, CONST_CAST2 (const char **, char **, argv));
2430 initialize_plugins ();
2433 print_version (stderr, "");
2436 print_plugins_help (stderr, "");
2438 /* Exit early if we can (e.g. -help). */
2439 if (!exit_after_options)
2442 if (warningcount || errorcount)
2443 print_ignored_options ();
2445 /* Invoke registered plugin callbacks if any. */
2446 invoke_plugin_callbacks (PLUGIN_FINISH, NULL);
2448 finalize_plugins ();
2449 if (errorcount || sorrycount)
2450 return (FATAL_EXIT_CODE);
2452 return (SUCCESS_EXIT_CODE);