1 /* Top level of GCC compilers (cc1, cc1plus, etc.)
2 Copyright (C) 1987, 1988, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
3 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
4 Free Software Foundation, Inc.
6 This file is part of GCC.
8 GCC is free software; you can redistribute it and/or modify it under
9 the terms of the GNU General Public License as published by the Free
10 Software Foundation; either version 3, or (at your option) any later
13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING3. If not see
20 <http://www.gnu.org/licenses/>. */
22 /* This is the top level of cc1/c++.
23 It parses command args, opens files, invokes the various passes
24 in the proper order, and counts the time used by each.
25 Error messages and low-level interface to malloc also handled here. */
28 #undef FLOAT /* This is for hpux. They should change hpux. */
29 #undef FFS /* Some systems define this in param.h. */
31 #include "coretypes.h"
35 #ifdef HAVE_SYS_RESOURCE_H
36 # include <sys/resource.h>
39 #ifdef HAVE_SYS_TIMES_H
40 # include <sys/times.h>
50 #include "insn-attr.h"
51 #include "insn-config.h"
52 #include "insn-flags.h"
53 #include "hard-reg-set.h"
60 #include "basic-block.h"
66 #include "diagnostic.h"
70 #include "dwarf2asm.h"
71 #include "integrate.h"
75 #include "langhooks.h"
76 #include "cfglayout.h"
78 #include "hosthooks.h"
82 #include "value-prof.h"
83 #include "alloc-pool.h"
84 #include "tree-mudflap.h"
85 #include "tree-pass.h"
87 #include "tree-ssa-alias.h"
90 #if defined (DWARF2_UNWIND_INFO) || defined (DWARF2_DEBUGGING_INFO)
91 #include "dwarf2out.h"
94 #if defined(DBX_DEBUGGING_INFO) || defined(XCOFF_DEBUGGING_INFO)
98 #ifdef SDB_DEBUGGING_INFO
102 #ifdef XCOFF_DEBUGGING_INFO
103 #include "xcoffout.h" /* Needed for external data
104 declarations for e.g. AIX 4.x. */
107 static void general_init (const char *);
108 static void do_compile (void);
109 static void process_options (void);
110 static void backend_init (void);
111 static int lang_dependent_init (const char *);
112 static void init_asm_output (const char *);
113 static void finalize (void);
115 static void crash_signal (int) ATTRIBUTE_NORETURN;
116 static void setup_core_dumping (void);
117 static void compile_file (void);
119 /* Nonzero to dump debug info whilst parsing (-dy option). */
120 static int set_yydebug;
122 /* True if we don't need a backend (e.g. preprocessing only). */
123 static bool no_backend;
125 /* Length of line when printing switch values. */
128 /* Name of program invoked, sans directories. */
130 const char *progname;
132 /* Copy of argument vector to toplev_main. */
133 static const char **save_argv;
135 /* Name of top-level original source file (what was input to cpp).
136 This comes from the #-command at the beginning of the actual input.
137 If there isn't any there, then this is the cc1 input file name. */
139 const char *main_input_filename;
141 /* Used to enable -fvar-tracking, -fweb and -frename-registers according
142 to optimize and default_debug_hooks in process_options (). */
143 #define AUTODETECT_VALUE 2
145 /* Current position in real source file. */
147 location_t input_location;
149 struct line_maps *line_table;
151 /* Name to use as base of names for dump output files. */
153 const char *dump_base_name;
155 /* Name to use as a base for auxiliary output files. */
157 const char *aux_base_name;
159 /* Prefix for profile data files */
160 const char *profile_data_prefix;
162 /* A mask of target_flags that includes bit X if X was set or cleared
163 on the command line. */
165 int target_flags_explicit;
167 /* Debug hooks - dependent upon command line options. */
169 const struct gcc_debug_hooks *debug_hooks;
171 /* Debug hooks - target default. */
173 static const struct gcc_debug_hooks *default_debug_hooks;
175 /* Other flags saying which kinds of debugging dump have been requested. */
177 int rtl_dump_and_exit;
178 int flag_print_asm_name;
179 enum graph_dump_types graph_dump_format;
181 /* Name for output file of assembly code, specified with -o. */
183 const char *asm_file_name;
185 /* Nonzero means do optimizations. -O.
186 Particular numeric values stand for particular amounts of optimization;
187 thus, -O2 stores 2 here. However, the optimizations beyond the basic
188 ones are not controlled directly by this variable. Instead, they are
189 controlled by individual `flag_...' variables that are defaulted
190 based on this variable. */
194 /* Nonzero means optimize for size. -Os.
195 The only valid values are zero and nonzero. When optimize_size is
196 nonzero, optimize defaults to 2, but certain individual code
197 bloating optimizations are disabled. */
199 int optimize_size = 0;
201 /* The FUNCTION_DECL for the function currently being compiled,
202 or 0 if between functions. */
203 tree current_function_decl;
205 /* Set to the FUNC_BEGIN label of the current function, or NULL
207 const char * current_function_func_begin_label;
209 /* Nonzero means to collect statistics which might be expensive
210 and to print them when we are done. */
211 int flag_detailed_statistics = 0;
213 /* A random sequence of characters, unless overridden by user. */
214 static const char *flag_random_seed;
216 /* A local time stamp derived from the time of compilation. It will be
217 zero if the system cannot provide a time. It will be -1u, if the
218 user has specified a particular random seed. */
223 /* Nonzero means `char' should be signed. */
225 int flag_signed_char;
227 /* Nonzero means give an enum type only as many bytes as it needs. A value
228 of 2 means it has not yet been initialized. */
230 int flag_short_enums;
232 /* Nonzero if structures and unions should be returned in memory.
234 This should only be defined if compatibility with another compiler or
235 with an ABI is needed, because it results in slower code. */
237 #ifndef DEFAULT_PCC_STRUCT_RETURN
238 #define DEFAULT_PCC_STRUCT_RETURN 1
241 /* Nonzero for -fpcc-struct-return: return values the same way PCC does. */
243 int flag_pcc_struct_return = DEFAULT_PCC_STRUCT_RETURN;
245 /* 0 means straightforward implementation of complex divide acceptable.
246 1 means wide ranges of inputs must work for complex divide.
247 2 means C99-like requirements for complex multiply and divide. */
249 int flag_complex_method = 1;
251 /* Nonzero means we should be saving declaration info into a .X file. */
253 int flag_gen_aux_info = 0;
255 /* Specified name of aux-info file. */
257 const char *aux_info_file_name;
259 /* Nonzero if we are compiling code for a shared library, zero for
264 /* Generate code for GNU or NeXT Objective-C runtime environment. */
266 #ifdef NEXT_OBJC_RUNTIME
267 int flag_next_runtime = 1;
269 int flag_next_runtime = 0;
272 /* Set to the default thread-local storage (tls) model to use. */
274 enum tls_model flag_tls_default = TLS_MODEL_GLOBAL_DYNAMIC;
276 /* Set the default region and algorithm for the integrated register
279 enum ira_algorithm flag_ira_algorithm = IRA_ALGORITHM_CB;
280 enum ira_region flag_ira_region = IRA_REGION_MIXED;
282 /* Set the default value for -fira-verbose. */
284 unsigned int flag_ira_verbose = 5;
286 /* Set the default for excess precision. */
288 enum excess_precision flag_excess_precision_cmdline = EXCESS_PRECISION_DEFAULT;
289 enum excess_precision flag_excess_precision = EXCESS_PRECISION_DEFAULT;
291 /* Nonzero means change certain warnings into errors.
292 Usually these are warnings about failure to conform to some standard. */
294 int flag_pedantic_errors = 0;
296 /* Nonzero means make permerror produce warnings instead of errors. */
298 int flag_permissive = 0;
300 /* -dA causes debug commentary information to be produced in
301 the generated assembly code (to make it more readable). This option
302 is generally only of use to those who actually need to read the
303 generated assembly code (perhaps while debugging the compiler itself).
304 Currently, this switch is only used by dwarfout.c; however, it is intended
305 to be a catchall for printing debug information in the assembler file. */
307 int flag_debug_asm = 0;
309 /* -dP causes the rtl to be emitted as a comment in assembly. */
311 int flag_dump_rtl_in_asm = 0;
313 /* When non-NULL, indicates that whenever space is allocated on the
314 stack, the resulting stack pointer must not pass this
315 address---that is, for stacks that grow downward, the stack pointer
316 must always be greater than or equal to this address; for stacks
317 that grow upward, the stack pointer must be less than this address.
318 At present, the rtx may be either a REG or a SYMBOL_REF, although
319 the support provided depends on the backend. */
322 /* Nonzero if we should track variables. When
323 flag_var_tracking == AUTODETECT_VALUE it will be set according
324 to optimize, debug_info_level and debug_hooks in process_options (). */
325 int flag_var_tracking = AUTODETECT_VALUE;
327 /* Type of stack check. */
328 enum stack_check_type flag_stack_check = NO_STACK_CHECK;
330 /* True if the user has tagged the function with the 'section'
333 bool user_defined_section_attribute = false;
335 /* Values of the -falign-* flags: how much to align labels in code.
336 0 means `use default', 1 means `don't align'.
337 For each variable, there is an _log variant which is the power
338 of two not less than the variable, for .align output. */
341 int align_loops_max_skip;
343 int align_jumps_max_skip;
344 int align_labels_log;
345 int align_labels_max_skip;
346 int align_functions_log;
350 const char *const string;
354 lang_independent_options;
356 /* Nonzero if subexpressions must be evaluated from left-to-right. */
357 int flag_evaluation_order = 0;
359 /* The user symbol prefix after having resolved same. */
360 const char *user_label_prefix;
362 static const param_info lang_independent_params[] = {
363 #define DEFPARAM(ENUM, OPTION, HELP, DEFAULT, MIN, MAX) \
364 { OPTION, DEFAULT, false, MIN, MAX, HELP },
365 #include "params.def"
367 { NULL, 0, false, 0, 0, NULL }
370 /* Output files for assembler code (real compiler output)
371 and debugging dumps. */
375 FILE *dump_file = NULL;
376 const char *dump_file_name;
378 /* The current working directory of a translation. It's generally the
379 directory from which compilation was initiated, but a preprocessed
380 file may specify the original directory in which it was
383 static const char *src_pwd;
385 /* Initialize src_pwd with the given string, and return true. If it
386 was already initialized, return false. As a special case, it may
387 be called with a NULL argument to test whether src_pwd has NOT been
391 set_src_pwd (const char *pwd)
395 if (strcmp (src_pwd, pwd) == 0)
401 src_pwd = xstrdup (pwd);
405 /* Return the directory from which the translation unit was initiated,
406 in case set_src_pwd() was not called before to assign it a
422 /* Called when the start of a function definition is parsed,
423 this function prints on stderr the name of the function. */
425 announce_function (tree decl)
429 if (rtl_dump_and_exit)
430 fprintf (stderr, "%s ", IDENTIFIER_POINTER (DECL_NAME (decl)));
432 fprintf (stderr, " %s", lang_hooks.decl_printable_name (decl, 2));
434 pp_needs_newline (global_dc->printer) = true;
435 diagnostic_set_last_function (global_dc, (diagnostic_info *) NULL);
439 /* Initialize local_tick with the time of day, or -1 if
440 flag_random_seed is set. */
443 init_local_tick (void)
445 if (!flag_random_seed)
447 /* Get some more or less random data. */
448 #ifdef HAVE_GETTIMEOFDAY
452 gettimeofday (&tv, NULL);
453 local_tick = tv.tv_sec * 1000 + tv.tv_usec / 1000;
457 time_t now = time (NULL);
459 if (now != (time_t)-1)
460 local_tick = (unsigned) now;
468 /* Set up a default flag_random_seed and local_tick, unless the user
469 already specified one. Must be called after init_local_tick. */
472 init_random_seed (void)
474 unsigned HOST_WIDE_INT value;
475 static char random_seed[HOST_BITS_PER_WIDE_INT / 4 + 3];
477 value = local_tick ^ getpid ();
479 sprintf (random_seed, HOST_WIDE_INT_PRINT_HEX, value);
480 flag_random_seed = random_seed;
483 /* Obtain the random_seed string. Unless NOINIT, initialize it if
484 it's not provided in the command line. */
487 get_random_seed (bool noinit)
489 if (!flag_random_seed && !noinit)
491 return flag_random_seed;
494 /* Modify the random_seed string to VAL. Return its previous
498 set_random_seed (const char *val)
500 const char *old = flag_random_seed;
501 flag_random_seed = val;
505 /* Decode the string P as an integral parameter.
506 If the string is indeed an integer return its numeric value else
507 issue an Invalid Option error for the option PNAME and return DEFVAL.
508 If PNAME is zero just return DEFVAL, do not call error. */
511 read_integral_parameter (const char *p, const char *pname, const int defval)
513 const char *endp = p;
526 error ("invalid option argument %qs", pname);
533 /* When compiling with a recent enough GCC, we use the GNU C "extern inline"
534 for floor_log2 and exact_log2; see toplev.h. That construct, however,
535 conflicts with the ISO C++ One Definition Rule. */
537 #if GCC_VERSION < 3004 || !defined (__cplusplus)
539 /* Given X, an unsigned number, return the largest int Y such that 2**Y <= X.
540 If X is 0, return -1. */
543 floor_log2 (unsigned HOST_WIDE_INT x)
551 t = HOST_BITS_PER_WIDE_INT - 1 - (int) CLZ_HWI (x);
553 if (HOST_BITS_PER_WIDE_INT > 64)
554 if (x >= (unsigned HOST_WIDE_INT) 1 << (t + 64))
556 if (HOST_BITS_PER_WIDE_INT > 32)
557 if (x >= ((unsigned HOST_WIDE_INT) 1) << (t + 32))
559 if (x >= ((unsigned HOST_WIDE_INT) 1) << (t + 16))
561 if (x >= ((unsigned HOST_WIDE_INT) 1) << (t + 8))
563 if (x >= ((unsigned HOST_WIDE_INT) 1) << (t + 4))
565 if (x >= ((unsigned HOST_WIDE_INT) 1) << (t + 2))
567 if (x >= ((unsigned HOST_WIDE_INT) 1) << (t + 1))
574 /* Return the logarithm of X, base 2, considering X unsigned,
575 if X is a power of 2. Otherwise, returns -1. */
578 exact_log2 (unsigned HOST_WIDE_INT x)
583 return x ? CTZ_HWI (x) : -1;
585 return floor_log2 (x);
589 #endif /* GCC_VERSION < 3004 || !defined (__cplusplus) */
591 /* Handler for fatal signals, such as SIGSEGV. These are transformed
592 into ICE messages, which is much more user friendly. In case the
593 error printer crashes, reset the signal to prevent infinite recursion. */
596 crash_signal (int signo)
598 signal (signo, SIG_DFL);
600 /* If we crashed while processing an ASM statement, then be a little more
601 graceful. It's most likely the user's fault. */
602 if (this_is_asm_operands)
604 output_operand_lossage ("unrecoverable error");
605 exit (FATAL_EXIT_CODE);
608 internal_error ("%s", strsignal (signo));
611 /* Arrange to dump core on error. (The regular error message is still
612 printed first, except in the case of abort().) */
615 setup_core_dumping (void)
618 signal (SIGABRT, SIG_DFL);
620 #if defined(HAVE_SETRLIMIT)
623 if (getrlimit (RLIMIT_CORE, &rlim) != 0)
624 fatal_error ("getting core file size maximum limit: %m");
625 rlim.rlim_cur = rlim.rlim_max;
626 if (setrlimit (RLIMIT_CORE, &rlim) != 0)
627 fatal_error ("setting core file size limit to maximum: %m");
630 diagnostic_abort_on_error (global_dc);
634 /* Strip off a legitimate source ending from the input string NAME of
635 length LEN. Rather than having to know the names used by all of
636 our front ends, we strip off an ending of a period followed by
637 up to five characters. (Java uses ".class".) */
640 strip_off_ending (char *name, int len)
643 for (i = 2; i < 6 && len > i; i++)
645 if (name[len - i] == '.')
647 name[len - i] = '\0';
653 /* Output a quoted string. */
656 output_quoted_string (FILE *asm_file, const char *string)
658 #ifdef OUTPUT_QUOTED_STRING
659 OUTPUT_QUOTED_STRING (asm_file, string);
663 putc ('\"', asm_file);
664 while ((c = *string++) != 0)
668 if (c == '\"' || c == '\\')
669 putc ('\\', asm_file);
673 fprintf (asm_file, "\\%03o", (unsigned char) c);
675 putc ('\"', asm_file);
679 /* Output a file name in the form wanted by System V. */
682 output_file_directive (FILE *asm_file, const char *input_name)
687 if (input_name == NULL)
688 input_name = "<stdin>";
690 input_name = remap_debug_filename (input_name);
692 len = strlen (input_name);
693 na = input_name + len;
695 /* NA gets INPUT_NAME sans directory names. */
696 while (na > input_name)
698 if (IS_DIR_SEPARATOR (na[-1]))
703 #ifdef ASM_OUTPUT_SOURCE_FILENAME
704 ASM_OUTPUT_SOURCE_FILENAME (asm_file, na);
706 fprintf (asm_file, "\t.file\t");
707 output_quoted_string (asm_file, na);
708 fputc ('\n', asm_file);
712 /* A subroutine of wrapup_global_declarations. We've come to the end of
713 the compilation unit. All deferred variables should be undeferred,
714 and all incomplete decls should be finalized. */
717 wrapup_global_declaration_1 (tree decl)
719 /* We're not deferring this any longer. Assignment is conditional to
720 avoid needlessly dirtying PCH pages. */
721 if (CODE_CONTAINS_STRUCT (TREE_CODE (decl), TS_DECL_WITH_VIS)
722 && DECL_DEFER_OUTPUT (decl) != 0)
723 DECL_DEFER_OUTPUT (decl) = 0;
725 if (TREE_CODE (decl) == VAR_DECL && DECL_SIZE (decl) == 0)
726 lang_hooks.finish_incomplete_decl (decl);
729 /* A subroutine of wrapup_global_declarations. Decide whether or not DECL
730 needs to be output. Return true if it is output. */
733 wrapup_global_declaration_2 (tree decl)
735 if (TREE_ASM_WRITTEN (decl) || DECL_EXTERNAL (decl))
738 /* Don't write out static consts, unless we still need them.
740 We also keep static consts if not optimizing (for debugging),
741 unless the user specified -fno-keep-static-consts.
742 ??? They might be better written into the debug information.
743 This is possible when using DWARF.
745 A language processor that wants static constants to be always
746 written out (even if it is not used) is responsible for
747 calling rest_of_decl_compilation itself. E.g. the C front-end
748 calls rest_of_decl_compilation from finish_decl.
749 One motivation for this is that is conventional in some
750 environments to write things like:
751 static const char rcsid[] = "... version string ...";
752 intending to force the string to be in the executable.
754 A language processor that would prefer to have unneeded
755 static constants "optimized away" would just defer writing
756 them out until here. E.g. C++ does this, because static
757 constants are often defined in header files.
759 ??? A tempting alternative (for both C and C++) would be
760 to force a constant to be written if and only if it is
761 defined in a main file, as opposed to an include file. */
763 if (TREE_CODE (decl) == VAR_DECL && TREE_STATIC (decl))
765 struct varpool_node *node;
767 node = varpool_node (decl);
771 else if (node->alias)
773 else if (!cgraph_global_info_ready
775 || TREE_USED (DECL_ASSEMBLER_NAME (decl))))
777 else if (node->needed)
779 else if (DECL_COMDAT (decl))
781 else if (TREE_READONLY (decl) && !TREE_PUBLIC (decl)
782 && (optimize || !flag_keep_static_consts
783 || DECL_ARTIFICIAL (decl)))
788 rest_of_decl_compilation (decl, 1, 1);
796 /* Do any final processing required for the declarations in VEC, of
797 which there are LEN. We write out inline functions and variables
798 that have been deferred until this point, but which are required.
799 Returns nonzero if anything was put out. */
802 wrapup_global_declarations (tree *vec, int len)
804 bool reconsider, output_something = false;
807 for (i = 0; i < len; i++)
808 wrapup_global_declaration_1 (vec[i]);
810 /* Now emit any global variables or functions that we have been
811 putting off. We need to loop in case one of the things emitted
812 here references another one which comes earlier in the list. */
816 for (i = 0; i < len; i++)
817 reconsider |= wrapup_global_declaration_2 (vec[i]);
819 output_something = true;
823 return output_something;
826 /* A subroutine of check_global_declarations. Issue appropriate warnings
827 for the global declaration DECL. */
830 check_global_declaration_1 (tree decl)
832 /* Warn about any function declared static but not defined. We don't
833 warn about variables, because many programs have static variables
834 that exist only to get some text into the object file. */
835 if (TREE_CODE (decl) == FUNCTION_DECL
836 && DECL_INITIAL (decl) == 0
837 && DECL_EXTERNAL (decl)
838 && ! DECL_ARTIFICIAL (decl)
839 && ! TREE_NO_WARNING (decl)
840 && ! TREE_PUBLIC (decl)
841 && (warn_unused_function
842 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl))))
844 if (TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl)))
845 pedwarn (input_location, 0, "%q+F used but never defined", decl);
847 warning (OPT_Wunused_function, "%q+F declared %<static%> but never defined", decl);
848 /* This symbol is effectively an "extern" declaration now. */
849 TREE_PUBLIC (decl) = 1;
850 assemble_external (decl);
853 /* Warn about static fns or vars defined but not used. */
854 if (((warn_unused_function && TREE_CODE (decl) == FUNCTION_DECL)
855 /* We don't warn about "static const" variables because the
856 "rcs_id" idiom uses that construction. */
857 || (warn_unused_variable
858 && TREE_CODE (decl) == VAR_DECL && ! TREE_READONLY (decl)))
859 && ! DECL_IN_SYSTEM_HEADER (decl)
860 && ! TREE_USED (decl)
861 /* The TREE_USED bit for file-scope decls is kept in the identifier,
862 to handle multiple external decls in different scopes. */
863 && ! (DECL_NAME (decl) && TREE_USED (DECL_NAME (decl)))
864 && ! DECL_EXTERNAL (decl)
865 && ! TREE_PUBLIC (decl)
866 /* A volatile variable might be used in some non-obvious way. */
867 && ! TREE_THIS_VOLATILE (decl)
868 /* Global register variables must be declared to reserve them. */
869 && ! (TREE_CODE (decl) == VAR_DECL && DECL_REGISTER (decl))
870 /* Otherwise, ask the language. */
871 && lang_hooks.decls.warn_unused_global (decl))
872 warning ((TREE_CODE (decl) == FUNCTION_DECL)
873 ? OPT_Wunused_function
874 : OPT_Wunused_variable,
875 "%q+D defined but not used", decl);
878 /* Issue appropriate warnings for the global declarations in VEC (of
879 which there are LEN). */
882 check_global_declarations (tree *vec, int len)
886 for (i = 0; i < len; i++)
887 check_global_declaration_1 (vec[i]);
890 /* Emit debugging information for all global declarations in VEC. */
893 emit_debug_global_declarations (tree *vec, int len)
897 /* Avoid confusing the debug information machinery when there are errors. */
898 if (errorcount != 0 || sorrycount != 0)
901 timevar_push (TV_SYMOUT);
902 for (i = 0; i < len; i++)
903 debug_hooks->global_decl (vec[i]);
904 timevar_pop (TV_SYMOUT);
907 /* Warn about a use of an identifier which was marked deprecated. */
909 warn_deprecated_use (tree node)
911 if (node == 0 || !warn_deprecated_decl)
916 expanded_location xloc = expand_location (DECL_SOURCE_LOCATION (node));
917 warning (OPT_Wdeprecated_declarations,
918 "%qD is deprecated (declared at %s:%d)",
919 node, xloc.file, xloc.line);
921 else if (TYPE_P (node))
923 const char *what = NULL;
924 tree decl = TYPE_STUB_DECL (node);
926 if (TYPE_NAME (node))
928 if (TREE_CODE (TYPE_NAME (node)) == IDENTIFIER_NODE)
929 what = IDENTIFIER_POINTER (TYPE_NAME (node));
930 else if (TREE_CODE (TYPE_NAME (node)) == TYPE_DECL
931 && DECL_NAME (TYPE_NAME (node)))
932 what = IDENTIFIER_POINTER (DECL_NAME (TYPE_NAME (node)));
937 expanded_location xloc
938 = expand_location (DECL_SOURCE_LOCATION (decl));
940 warning (OPT_Wdeprecated_declarations,
941 "%qs is deprecated (declared at %s:%d)", what,
942 xloc.file, xloc.line);
944 warning (OPT_Wdeprecated_declarations,
945 "type is deprecated (declared at %s:%d)",
946 xloc.file, xloc.line);
951 warning (OPT_Wdeprecated_declarations, "%qs is deprecated", what);
953 warning (OPT_Wdeprecated_declarations, "type is deprecated");
958 /* Compile an entire translation unit. Write a file of assembly
959 output and various debugging dumps. */
964 /* Initialize yet another pass. */
966 ggc_protect_identifiers = true;
969 init_final (main_input_filename);
970 coverage_init (aux_base_name);
973 timevar_push (TV_PARSE);
975 /* Call the parser, which parses the entire file (calling
976 rest_of_compilation for each function). */
977 lang_hooks.parse_file (set_yydebug);
979 /* Compilation is now finished except for writing
980 what's left of the symbol table output. */
981 timevar_pop (TV_PARSE);
983 if (flag_syntax_only)
986 ggc_protect_identifiers = false;
988 lang_hooks.decls.final_write_globals ();
990 if (errorcount || sorrycount)
993 varpool_assemble_pending_decls ();
996 /* Likewise for mudflap static object registrations. */
998 mudflap_finish_file ();
1000 /* Likewise for emulated thread-local storage. */
1001 if (!targetm.have_tls)
1004 output_shared_constant_pool ();
1005 output_object_blocks ();
1007 /* Write out any pending weak symbol declarations. */
1010 /* Do dbx symbols. */
1011 timevar_push (TV_SYMOUT);
1013 #if defined DWARF2_DEBUGGING_INFO || defined DWARF2_UNWIND_INFO
1014 if (dwarf2out_do_frame ())
1015 dwarf2out_frame_finish ();
1018 (*debug_hooks->finish) (main_input_filename);
1019 timevar_pop (TV_SYMOUT);
1021 /* Output some stuff at end of file if nec. */
1023 dw2_output_indirect_constants ();
1025 /* Flush any pending external directives. */
1026 process_pending_assemble_externals ();
1028 /* Attach a special .ident directive to the end of the file to identify
1029 the version of GCC which compiled this code. The format of the .ident
1030 string is patterned after the ones produced by native SVR4 compilers. */
1034 const char *pkg_version = "(GNU) ";
1036 if (strcmp ("(GCC) ", pkgversion_string))
1037 pkg_version = pkgversion_string;
1038 fprintf (asm_out_file, "%s\"GCC: %s%s\"\n",
1039 IDENT_ASM_OP, pkg_version, version_string);
1043 /* This must be at the end. Some target ports emit end of file directives
1044 into the assembly file here, and hence we can not output anything to the
1045 assembly file after this point. */
1046 targetm.asm_out.file_end ();
1049 /* Parse a -d... command line switch. */
1052 decode_d_option (const char *arg)
1063 flag_print_asm_name = 1;
1066 flag_dump_rtl_in_asm = 1;
1067 flag_print_asm_name = 1;
1070 graph_dump_format = vcg;
1073 rtl_dump_and_exit = 1;
1078 case 'D': /* These are handled by the preprocessor. */
1085 setup_core_dumping();
1088 enable_rtl_dump_file ();
1092 warning (0, "unrecognized gcc debugging option: %c", c);
1097 /* Indexed by enum debug_info_type. */
1098 const char *const debug_type_names[] =
1100 "none", "stabs", "coff", "dwarf-2", "xcoff", "vms"
1103 /* Print version information to FILE.
1104 Each line begins with INDENT (for the case where FILE is the
1105 assembler output file). */
1108 print_version (FILE *file, const char *indent)
1110 static const char fmt1[] =
1112 N_("%s%s%s %sversion %s (%s)\n%s\tcompiled by GNU C version %s, ")
1114 N_("%s%s%s %sversion %s (%s) compiled by CC, ")
1117 static const char fmt2[] =
1118 N_("GMP version %s, MPFR version %s.\n");
1119 static const char fmt3[] =
1120 N_("%s%swarning: %s header version %s differs from library version %s.\n");
1121 static const char fmt4[] =
1122 N_("%s%sGGC heuristics: --param ggc-min-expand=%d --param ggc-min-heapsize=%d\n");
1124 #define __VERSION__ "[?]"
1127 file == stderr ? _(fmt1) : fmt1,
1128 indent, *indent != 0 ? " " : "",
1129 lang_hooks.name, pkgversion_string, version_string, TARGET_NAME,
1130 indent, __VERSION__);
1132 /* We need to stringify the GMP macro values. Ugh, gmp_version has
1133 two string formats, "i.j.k" and "i.j" when k is zero. */
1134 #define GCC_GMP_STRINGIFY_VERSION3(X) #X
1135 #define GCC_GMP_STRINGIFY_VERSION2(X) GCC_GMP_STRINGIFY_VERSION3(X)
1136 #if __GNU_MP_VERSION_PATCHLEVEL == 0
1137 #define GCC_GMP_STRINGIFY_VERSION GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION) "." \
1138 GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION_MINOR)
1140 #define GCC_GMP_STRINGIFY_VERSION GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION) "." \
1141 GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION_MINOR) "." \
1142 GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION_PATCHLEVEL)
1145 file == stderr ? _(fmt2) : fmt2,
1146 GCC_GMP_STRINGIFY_VERSION, MPFR_VERSION_STRING);
1147 if (strcmp (GCC_GMP_STRINGIFY_VERSION, gmp_version))
1149 file == stderr ? _(fmt3) : fmt3,
1150 indent, *indent != 0 ? " " : "",
1151 "GMP", GCC_GMP_STRINGIFY_VERSION, gmp_version);
1152 if (strcmp (MPFR_VERSION_STRING, mpfr_get_version ()))
1154 file == stderr ? _(fmt3) : fmt3,
1155 indent, *indent != 0 ? " " : "",
1156 "MPFR", MPFR_VERSION_STRING, mpfr_get_version ());
1158 file == stderr ? _(fmt4) : fmt4,
1159 indent, *indent != 0 ? " " : "",
1160 PARAM_VALUE (GGC_MIN_EXPAND), PARAM_VALUE (GGC_MIN_HEAPSIZE));
1162 print_plugins_versions (file, indent);
1165 #ifdef ASM_COMMENT_START
1167 print_to_asm_out_file (print_switch_type type, const char * text)
1169 bool prepend_sep = true;
1173 case SWITCH_TYPE_LINE_END:
1174 putc ('\n', asm_out_file);
1177 case SWITCH_TYPE_LINE_START:
1178 fputs (ASM_COMMENT_START, asm_out_file);
1179 return strlen (ASM_COMMENT_START);
1181 case SWITCH_TYPE_DESCRIPTIVE:
1182 if (ASM_COMMENT_START[0] == 0)
1183 prepend_sep = false;
1185 case SWITCH_TYPE_PASSED:
1186 case SWITCH_TYPE_ENABLED:
1188 fputc (' ', asm_out_file);
1189 fprintf (asm_out_file, text);
1190 /* No need to return the length here as
1191 print_single_switch has already done it. */
1201 print_to_stderr (print_switch_type type, const char * text)
1205 case SWITCH_TYPE_LINE_END:
1206 putc ('\n', stderr);
1209 case SWITCH_TYPE_LINE_START:
1212 case SWITCH_TYPE_PASSED:
1213 case SWITCH_TYPE_ENABLED:
1214 fputc (' ', stderr);
1217 case SWITCH_TYPE_DESCRIPTIVE:
1218 fprintf (stderr, text);
1219 /* No need to return the length here as
1220 print_single_switch has already done it. */
1228 /* Print an option value and return the adjusted position in the line.
1229 ??? print_fn doesn't handle errors, eg disk full; presumably other
1230 code will catch a disk full though. */
1233 print_single_switch (print_switch_fn_type print_fn,
1235 print_switch_type type,
1238 /* The ultrix fprintf returns 0 on success, so compute the result
1239 we want here since we need it for the following test. The +1
1240 is for the separator character that will probably be emitted. */
1241 int len = strlen (text) + 1;
1244 && pos + len > MAX_LINE)
1246 print_fn (SWITCH_TYPE_LINE_END, NULL);
1251 pos += print_fn (SWITCH_TYPE_LINE_START, NULL);
1253 print_fn (type, text);
1257 /* Print active target switches using PRINT_FN.
1258 POS is the current cursor position and MAX is the size of a "line".
1259 Each line begins with INDENT and ends with TERM.
1260 Each switch is separated from the next by SEP. */
1263 print_switch_values (print_switch_fn_type print_fn)
1269 /* Fill in the -frandom-seed option, if the user didn't pass it, so
1270 that it can be printed below. This helps reproducibility. */
1271 if (!flag_random_seed)
1272 init_random_seed ();
1274 /* Print the options as passed. */
1275 pos = print_single_switch (print_fn, pos,
1276 SWITCH_TYPE_DESCRIPTIVE, _("options passed: "));
1278 for (p = &save_argv[1]; *p != NULL; p++)
1283 if (strcmp (*p, "-o") == 0
1284 || strcmp (*p, "-dumpbase") == 0
1285 || strcmp (*p, "-auxbase") == 0)
1292 if (strcmp (*p, "-quiet") == 0
1293 || strcmp (*p, "-version") == 0)
1300 pos = print_single_switch (print_fn, pos, SWITCH_TYPE_PASSED, *p);
1304 print_fn (SWITCH_TYPE_LINE_END, NULL);
1306 /* Print the -f and -m options that have been enabled.
1307 We don't handle language specific options but printing argv
1309 pos = print_single_switch (print_fn, 0,
1310 SWITCH_TYPE_DESCRIPTIVE, _("options enabled: "));
1312 for (j = 0; j < cl_options_count; j++)
1313 if ((cl_options[j].flags & CL_REPORT)
1314 && option_enabled (j) > 0)
1315 pos = print_single_switch (print_fn, pos,
1316 SWITCH_TYPE_ENABLED, cl_options[j].opt_text);
1318 print_fn (SWITCH_TYPE_LINE_END, NULL);
1321 /* Open assembly code output file. Do this even if -fsyntax-only is
1322 on, because then the driver will have provided the name of a
1323 temporary file or bit bucket for us. NAME is the file specified on
1324 the command line, possibly NULL. */
1326 init_asm_output (const char *name)
1328 if (name == NULL && asm_file_name == 0)
1329 asm_out_file = stdout;
1332 if (asm_file_name == 0)
1334 int len = strlen (dump_base_name);
1335 char *dumpname = XNEWVEC (char, len + 6);
1337 memcpy (dumpname, dump_base_name, len + 1);
1338 strip_off_ending (dumpname, len);
1339 strcat (dumpname, ".s");
1340 asm_file_name = dumpname;
1342 if (!strcmp (asm_file_name, "-"))
1343 asm_out_file = stdout;
1345 asm_out_file = fopen (asm_file_name, "w+b");
1346 if (asm_out_file == 0)
1347 fatal_error ("can%'t open %s for writing: %m", asm_file_name);
1350 if (!flag_syntax_only)
1352 targetm.asm_out.file_start ();
1354 if (flag_record_gcc_switches)
1356 if (targetm.asm_out.record_gcc_switches)
1358 /* Let the target know that we are about to start recording. */
1359 targetm.asm_out.record_gcc_switches (SWITCH_TYPE_DESCRIPTIVE,
1361 /* Now record the switches. */
1362 print_switch_values (targetm.asm_out.record_gcc_switches);
1363 /* Let the target know that the recording is over. */
1364 targetm.asm_out.record_gcc_switches (SWITCH_TYPE_DESCRIPTIVE,
1368 inform (input_location, "-frecord-gcc-switches is not supported by the current target");
1371 #ifdef ASM_COMMENT_START
1372 if (flag_verbose_asm)
1374 /* Print the list of switches in effect
1375 into the assembler file as comments. */
1376 print_version (asm_out_file, ASM_COMMENT_START);
1377 print_switch_values (print_to_asm_out_file);
1378 fprintf (asm_out_file, "\n");
1384 /* Return true if the state of option OPTION should be stored in PCH files
1385 and checked by default_pch_valid_p. Store the option's current state
1389 option_affects_pch_p (int option, struct cl_option_state *state)
1391 if ((cl_options[option].flags & CL_TARGET) == 0)
1393 if (cl_options[option].flag_var == &target_flags)
1394 if (targetm.check_pch_target_flags)
1396 return get_option_state (option, state);
1399 /* Default version of get_pch_validity.
1400 By default, every flag difference is fatal; that will be mostly right for
1401 most targets, but completely right for very few. */
1404 default_get_pch_validity (size_t *len)
1406 struct cl_option_state state;
1411 if (targetm.check_pch_target_flags)
1412 *len += sizeof (target_flags);
1413 for (i = 0; i < cl_options_count; i++)
1414 if (option_affects_pch_p (i, &state))
1417 result = r = XNEWVEC (char, *len);
1421 if (targetm.check_pch_target_flags)
1423 memcpy (r, &target_flags, sizeof (target_flags));
1424 r += sizeof (target_flags);
1427 for (i = 0; i < cl_options_count; i++)
1428 if (option_affects_pch_p (i, &state))
1430 memcpy (r, state.data, state.size);
1437 /* Return a message which says that a PCH file was created with a different
1438 setting of OPTION. */
1441 pch_option_mismatch (const char *option)
1445 asprintf (&r, _("created and used with differing settings of '%s'"), option);
1447 return _("out of memory");
1451 /* Default version of pch_valid_p. */
1454 default_pch_valid_p (const void *data_p, size_t len)
1456 struct cl_option_state state;
1457 const char *data = (const char *)data_p;
1460 /* -fpic and -fpie also usually make a PCH invalid. */
1461 if (data[0] != flag_pic)
1462 return _("created and used with different settings of -fpic");
1463 if (data[1] != flag_pie)
1464 return _("created and used with different settings of -fpie");
1467 /* Check target_flags. */
1468 if (targetm.check_pch_target_flags)
1473 memcpy (&tf, data, sizeof (target_flags));
1474 data += sizeof (target_flags);
1475 len -= sizeof (target_flags);
1476 r = targetm.check_pch_target_flags (tf);
1481 for (i = 0; i < cl_options_count; i++)
1482 if (option_affects_pch_p (i, &state))
1484 if (memcmp (data, state.data, state.size) != 0)
1485 return pch_option_mismatch (cl_options[i].opt_text);
1493 /* Default tree printer. Handles declarations only. */
1495 default_tree_printer (pretty_printer * pp, text_info *text, const char *spec,
1496 int precision, bool wide, bool set_locus, bool hash)
1500 /* FUTURE: %+x should set the locus. */
1501 if (precision != 0 || wide || hash)
1507 t = va_arg (*text->args_ptr, tree);
1508 if (TREE_CODE (t) == IDENTIFIER_NODE)
1510 pp_string (pp, IDENTIFIER_POINTER (t));
1516 t = va_arg (*text->args_ptr, tree);
1517 if (DECL_DEBUG_EXPR_IS_FROM (t) && DECL_DEBUG_EXPR (t))
1518 t = DECL_DEBUG_EXPR (t);
1523 t = va_arg (*text->args_ptr, tree);
1530 if (set_locus && text->locus)
1531 *text->locus = DECL_SOURCE_LOCATION (t);
1535 const char *n = DECL_NAME (t)
1536 ? lang_hooks.decl_printable_name (t, 2)
1541 dump_generic_node (pp, t, 0, TDF_DIAGNOSTIC, 0);
1546 /* A helper function; used as the reallocator function for cpp's line
1549 realloc_for_line_map (void *ptr, size_t len)
1551 return ggc_realloc (ptr, len);
1554 /* Initialization of the front end environment, before command line
1555 options are parsed. Signal handlers, internationalization etc.
1556 ARGV0 is main's argv[0]. */
1558 general_init (const char *argv0)
1562 p = argv0 + strlen (argv0);
1563 while (p != argv0 && !IS_DIR_SEPARATOR (p[-1]))
1567 xmalloc_set_program_name (progname);
1571 /* Unlock the stdio streams. */
1572 unlock_std_streams ();
1574 gcc_init_libintl ();
1576 /* Initialize the diagnostics reporting machinery, so option parsing
1577 can give warnings and errors. */
1578 diagnostic_initialize (global_dc);
1579 /* Set a default printer. Language specific initializations will
1580 override it later. */
1581 pp_format_decoder (global_dc->printer) = &default_tree_printer;
1583 /* Trap fatal signals, e.g. SIGSEGV, and convert them to ICE messages. */
1585 signal (SIGSEGV, crash_signal);
1588 signal (SIGILL, crash_signal);
1591 signal (SIGBUS, crash_signal);
1594 signal (SIGABRT, crash_signal);
1596 #if defined SIGIOT && (!defined SIGABRT || SIGABRT != SIGIOT)
1597 signal (SIGIOT, crash_signal);
1600 signal (SIGFPE, crash_signal);
1603 /* Other host-specific signal setup. */
1604 (*host_hooks.extra_signals)();
1606 /* Initialize the garbage-collector, string pools and tree type hash
1610 line_table = GGC_NEW (struct line_maps);
1611 linemap_init (line_table);
1612 line_table->reallocator = realloc_for_line_map;
1615 /* Initialize register usage now so switches may override. */
1618 /* Register the language-independent parameters. */
1619 add_params (lang_independent_params, LAST_PARAM);
1621 /* This must be done after add_params but before argument processing. */
1622 init_ggc_heuristics();
1623 init_optimization_passes ();
1624 statistics_early_init ();
1627 /* Return true if the current target supports -fsection-anchors. */
1630 target_supports_section_anchors_p (void)
1632 if (targetm.min_anchor_offset == 0 && targetm.max_anchor_offset == 0)
1635 if (targetm.asm_out.output_anchor == NULL)
1641 /* Default the align_* variables to 1 if they're still unset, and
1642 set up the align_*_log variables. */
1644 init_alignments (void)
1646 if (align_loops <= 0)
1648 if (align_loops_max_skip > align_loops)
1649 align_loops_max_skip = align_loops - 1;
1650 align_loops_log = floor_log2 (align_loops * 2 - 1);
1651 if (align_jumps <= 0)
1653 if (align_jumps_max_skip > align_jumps)
1654 align_jumps_max_skip = align_jumps - 1;
1655 align_jumps_log = floor_log2 (align_jumps * 2 - 1);
1656 if (align_labels <= 0)
1658 align_labels_log = floor_log2 (align_labels * 2 - 1);
1659 if (align_labels_max_skip > align_labels)
1660 align_labels_max_skip = align_labels - 1;
1661 if (align_functions <= 0)
1662 align_functions = 1;
1663 align_functions_log = floor_log2 (align_functions * 2 - 1);
1666 /* Process the options that have been parsed. */
1668 process_options (void)
1670 /* Just in case lang_hooks.post_options ends up calling a debug_hook.
1671 This can happen with incorrect pre-processed input. */
1672 debug_hooks = &do_nothing_debug_hooks;
1674 /* This replaces set_Wunused. */
1675 if (warn_unused_function == -1)
1676 warn_unused_function = warn_unused;
1677 if (warn_unused_label == -1)
1678 warn_unused_label = warn_unused;
1679 /* Wunused-parameter is enabled if both -Wunused -Wextra are enabled. */
1680 if (warn_unused_parameter == -1)
1681 warn_unused_parameter = (warn_unused && extra_warnings);
1682 if (warn_unused_variable == -1)
1683 warn_unused_variable = warn_unused;
1684 if (warn_unused_value == -1)
1685 warn_unused_value = warn_unused;
1687 /* Allow the front end to perform consistency checks and do further
1688 initialization based on the command line options. This hook also
1689 sets the original filename if appropriate (e.g. foo.i -> foo.c)
1690 so we can correctly initialize debug output. */
1691 no_backend = lang_hooks.post_options (&main_input_filename);
1693 #ifdef OVERRIDE_OPTIONS
1694 /* Some machines may reject certain combinations of options. */
1698 if (flag_section_anchors && !target_supports_section_anchors_p ())
1700 warning (OPT_fsection_anchors,
1701 "this target does not support %qs", "-fsection-anchors");
1702 flag_section_anchors = 0;
1705 if (flag_short_enums == 2)
1706 flag_short_enums = targetm.default_short_enums ();
1708 /* Set aux_base_name if not already set. */
1711 else if (main_input_filename)
1713 char *name = xstrdup (lbasename (main_input_filename));
1715 strip_off_ending (name, strlen (name));
1716 aux_base_name = name;
1719 aux_base_name = "gccaux";
1724 || flag_loop_interchange
1725 || flag_loop_strip_mine
1726 || flag_graphite_identity)
1727 sorry ("Graphite loop optimizations cannot be used");
1730 /* Unrolling all loops implies that standard loop unrolling must also
1732 if (flag_unroll_all_loops)
1733 flag_unroll_loops = 1;
1735 /* The loop unrolling code assumes that cse will be run after loop.
1736 web and rename-registers also help when run after loop unrolling. */
1738 if (flag_rerun_cse_after_loop == AUTODETECT_VALUE)
1739 flag_rerun_cse_after_loop = flag_unroll_loops || flag_peel_loops;
1740 if (flag_web == AUTODETECT_VALUE)
1741 flag_web = flag_unroll_loops || flag_peel_loops;
1742 if (flag_rename_registers == AUTODETECT_VALUE)
1743 flag_rename_registers = flag_unroll_loops || flag_peel_loops;
1745 if (flag_non_call_exceptions)
1746 flag_asynchronous_unwind_tables = 1;
1747 if (flag_asynchronous_unwind_tables)
1748 flag_unwind_tables = 1;
1750 if (flag_value_profile_transformations)
1751 flag_profile_values = 1;
1753 /* Warn about options that are not supported on this machine. */
1754 #ifndef INSN_SCHEDULING
1755 if (flag_schedule_insns || flag_schedule_insns_after_reload)
1756 warning (0, "instruction scheduling not supported on this target machine");
1759 if (flag_delayed_branch)
1760 warning (0, "this target machine does not have delayed branches");
1763 user_label_prefix = USER_LABEL_PREFIX;
1764 if (flag_leading_underscore != -1)
1766 /* If the default prefix is more complicated than "" or "_",
1767 issue a warning and ignore this option. */
1768 if (user_label_prefix[0] == 0 ||
1769 (user_label_prefix[0] == '_' && user_label_prefix[1] == 0))
1771 user_label_prefix = flag_leading_underscore ? "_" : "";
1774 warning (0, "-f%sleading-underscore not supported on this target machine",
1775 flag_leading_underscore ? "" : "no-");
1778 /* If we are in verbose mode, write out the version and maybe all the
1779 option flags in use. */
1782 print_version (stderr, "");
1784 print_switch_values (print_to_stderr);
1787 if (flag_syntax_only)
1789 write_symbols = NO_DEBUG;
1793 /* A lot of code assumes write_symbols == NO_DEBUG if the debugging
1795 if (debug_info_level == DINFO_LEVEL_NONE)
1796 write_symbols = NO_DEBUG;
1798 /* Now we know write_symbols, set up the debug hooks based on it.
1799 By default we do nothing for debug output. */
1800 if (PREFERRED_DEBUGGING_TYPE == NO_DEBUG)
1801 default_debug_hooks = &do_nothing_debug_hooks;
1802 #if defined(DBX_DEBUGGING_INFO)
1803 else if (PREFERRED_DEBUGGING_TYPE == DBX_DEBUG)
1804 default_debug_hooks = &dbx_debug_hooks;
1806 #if defined(XCOFF_DEBUGGING_INFO)
1807 else if (PREFERRED_DEBUGGING_TYPE == XCOFF_DEBUG)
1808 default_debug_hooks = &xcoff_debug_hooks;
1810 #ifdef SDB_DEBUGGING_INFO
1811 else if (PREFERRED_DEBUGGING_TYPE == SDB_DEBUG)
1812 default_debug_hooks = &sdb_debug_hooks;
1814 #ifdef DWARF2_DEBUGGING_INFO
1815 else if (PREFERRED_DEBUGGING_TYPE == DWARF2_DEBUG)
1816 default_debug_hooks = &dwarf2_debug_hooks;
1818 #ifdef VMS_DEBUGGING_INFO
1819 else if (PREFERRED_DEBUGGING_TYPE == VMS_DEBUG
1820 || PREFERRED_DEBUGGING_TYPE == VMS_AND_DWARF2_DEBUG)
1821 default_debug_hooks = &vmsdbg_debug_hooks;
1824 if (write_symbols == NO_DEBUG)
1826 #if defined(DBX_DEBUGGING_INFO)
1827 else if (write_symbols == DBX_DEBUG)
1828 debug_hooks = &dbx_debug_hooks;
1830 #if defined(XCOFF_DEBUGGING_INFO)
1831 else if (write_symbols == XCOFF_DEBUG)
1832 debug_hooks = &xcoff_debug_hooks;
1834 #ifdef SDB_DEBUGGING_INFO
1835 else if (write_symbols == SDB_DEBUG)
1836 debug_hooks = &sdb_debug_hooks;
1838 #ifdef DWARF2_DEBUGGING_INFO
1839 else if (write_symbols == DWARF2_DEBUG)
1840 debug_hooks = &dwarf2_debug_hooks;
1842 #ifdef VMS_DEBUGGING_INFO
1843 else if (write_symbols == VMS_DEBUG || write_symbols == VMS_AND_DWARF2_DEBUG)
1844 debug_hooks = &vmsdbg_debug_hooks;
1847 error ("target system does not support the \"%s\" debug format",
1848 debug_type_names[write_symbols]);
1850 /* Now we know which debug output will be used so we can set
1851 flag_var_tracking, flag_rename_registers if the user has
1852 not specified them. */
1853 if (debug_info_level < DINFO_LEVEL_NORMAL
1854 || debug_hooks->var_location == do_nothing_debug_hooks.var_location)
1856 if (flag_var_tracking == 1
1857 || flag_var_tracking_uninit == 1)
1859 if (debug_info_level < DINFO_LEVEL_NORMAL)
1860 warning (0, "variable tracking requested, but useless unless "
1861 "producing debug info");
1863 warning (0, "variable tracking requested, but not supported "
1864 "by this debug format");
1866 flag_var_tracking = 0;
1867 flag_var_tracking_uninit = 0;
1870 if (flag_rename_registers == AUTODETECT_VALUE)
1871 flag_rename_registers = default_debug_hooks->var_location
1872 != do_nothing_debug_hooks.var_location;
1874 if (flag_var_tracking == AUTODETECT_VALUE)
1875 flag_var_tracking = optimize >= 1;
1877 if (flag_tree_cselim == AUTODETECT_VALUE)
1878 #ifdef HAVE_conditional_move
1879 flag_tree_cselim = 1;
1881 flag_tree_cselim = 0;
1884 /* If the user specifically requested variable tracking with tagging
1885 uninitialized variables, we need to turn on variable tracking.
1886 (We already determined above that variable tracking is feasible.) */
1887 if (flag_var_tracking_uninit)
1888 flag_var_tracking = 1;
1890 /* If auxiliary info generation is desired, open the output file.
1891 This goes in the same directory as the source file--unlike
1892 all the other output files. */
1893 if (flag_gen_aux_info)
1895 aux_info_file = fopen (aux_info_file_name, "w");
1896 if (aux_info_file == 0)
1897 fatal_error ("can%'t open %s: %m", aux_info_file_name);
1900 if (! targetm.have_named_sections)
1902 if (flag_function_sections)
1904 warning (0, "-ffunction-sections not supported for this target");
1905 flag_function_sections = 0;
1907 if (flag_data_sections)
1909 warning (0, "-fdata-sections not supported for this target");
1910 flag_data_sections = 0;
1914 if (flag_function_sections && profile_flag)
1916 warning (0, "-ffunction-sections disabled; it makes profiling impossible");
1917 flag_function_sections = 0;
1920 #ifndef HAVE_prefetch
1921 if (flag_prefetch_loop_arrays)
1923 warning (0, "-fprefetch-loop-arrays not supported for this target");
1924 flag_prefetch_loop_arrays = 0;
1927 if (flag_prefetch_loop_arrays && !HAVE_prefetch)
1929 warning (0, "-fprefetch-loop-arrays not supported for this target (try -march switches)");
1930 flag_prefetch_loop_arrays = 0;
1934 /* This combination of options isn't handled for i386 targets and doesn't
1935 make much sense anyway, so don't allow it. */
1936 if (flag_prefetch_loop_arrays && optimize_size)
1938 warning (0, "-fprefetch-loop-arrays is not supported with -Os");
1939 flag_prefetch_loop_arrays = 0;
1942 /* The presence of IEEE signaling NaNs, implies all math can trap. */
1943 if (flag_signaling_nans)
1944 flag_trapping_math = 1;
1946 /* We cannot reassociate if we want traps or signed zeros. Â */
1947 if (flag_associative_math && (flag_trapping_math || flag_signed_zeros))
1949 warning (0, "-fassociative-math disabled; other options take precedence");
1950 flag_associative_math = 0;
1953 /* With -fcx-limited-range, we do cheap and quick complex arithmetic. */
1954 if (flag_cx_limited_range)
1955 flag_complex_method = 0;
1957 /* With -fcx-fortran-rules, we do something in-between cheap and C99. */
1958 if (flag_cx_fortran_rules)
1959 flag_complex_method = 1;
1961 /* Targets must be able to place spill slots at lower addresses. If the
1962 target already uses a soft frame pointer, the transition is trivial. */
1963 if (!FRAME_GROWS_DOWNWARD && flag_stack_protect)
1965 warning (0, "-fstack-protector not supported for this target");
1966 flag_stack_protect = 0;
1968 if (!flag_stack_protect)
1969 warn_stack_protect = 0;
1971 /* ??? Unwind info is not correct around the CFG unless either a frame
1972 pointer is present or A_O_A is set. Fixing this requires rewriting
1973 unwind info generation to be aware of the CFG and propagating states
1975 if (flag_unwind_tables && !ACCUMULATE_OUTGOING_ARGS
1976 && flag_omit_frame_pointer)
1978 warning (0, "unwind tables currently require a frame pointer "
1980 flag_omit_frame_pointer = 0;
1984 /* This function can be called multiple times to reinitialize the compiler
1985 back end when register classes or instruction sets have changed,
1986 before each function. */
1988 backend_init_target (void)
1990 /* Initialize alignment variables. */
1993 /* This reinitializes hard_frame_pointer, and calls init_reg_modes_target()
1994 to initialize reg_raw_mode[]. */
1997 /* This invokes target hooks to set fixed_reg[] etc, which is
2001 /* This depends on stack_pointer_rtx. */
2002 init_fake_stack_mems ();
2004 /* Sets static_base_value[HARD_FRAME_POINTER_REGNUM], which is
2006 init_alias_target ();
2008 /* Depends on HARD_FRAME_POINTER_REGNUM. */
2011 /* The following initialization functions need to generate rtl, so
2012 provide a dummy function context for them. */
2013 init_dummy_function_start ();
2015 /* rtx_cost is mode-dependent, so cached values need to be recomputed
2016 on a mode change. */
2019 /* We may need to recompute regno_save_code[] and regno_restore_code[]
2020 after a mode change as well. */
2021 if (flag_caller_saves)
2022 init_caller_save ();
2023 expand_dummy_function_end ();
2026 /* Initialize the compiler back end. This function is called only once,
2027 when starting the compiler. */
2031 init_emit_once (debug_info_level == DINFO_LEVEL_NORMAL
2032 || debug_info_level == DINFO_LEVEL_VERBOSE
2033 #ifdef VMS_DEBUGGING_INFO
2034 /* Enable line number info for traceback. */
2035 || debug_info_level > DINFO_LEVEL_NONE
2037 || flag_test_coverage);
2040 init_inline_once ();
2041 init_varasm_once ();
2042 save_register_info ();
2044 /* Initialize the target-specific back end pieces. */
2046 backend_init_target ();
2049 /* Initialize excess precision settings. */
2051 init_excess_precision (void)
2053 /* Adjust excess precision handling based on the target options. If
2054 the front end cannot handle it, flag_excess_precision_cmdline
2055 will already have been set accordingly in the post_options
2057 gcc_assert (flag_excess_precision_cmdline != EXCESS_PRECISION_DEFAULT);
2058 flag_excess_precision = flag_excess_precision_cmdline;
2059 if (flag_unsafe_math_optimizations)
2060 flag_excess_precision = EXCESS_PRECISION_FAST;
2061 if (flag_excess_precision == EXCESS_PRECISION_STANDARD)
2063 int flt_eval_method = TARGET_FLT_EVAL_METHOD;
2064 switch (flt_eval_method)
2068 /* Either the target acts unpredictably (-1) or has all the
2069 operations required not to have excess precision (0). */
2070 flag_excess_precision = EXCESS_PRECISION_FAST;
2074 /* In these cases, predictable excess precision makes
2078 /* Any other implementation-defined FLT_EVAL_METHOD values
2079 require the compiler to handle the associated excess
2080 precision rules in excess_precision_type. */
2086 /* Initialize things that are both lang-dependent and target-dependent.
2087 This function can be called more than once if target parameters change. */
2089 lang_dependent_init_target (void)
2091 /* This determines excess precision settings. */
2092 init_excess_precision ();
2094 /* This creates various _DECL nodes, so needs to be called after the
2095 front end is initialized. It also depends on the HAVE_xxx macros
2096 generated from the target machine description. */
2099 /* The following initialization functions need to generate rtl, so
2100 provide a dummy function context for them. */
2101 init_dummy_function_start ();
2103 /* Do the target-specific parts of expr initialization. */
2104 init_expr_target ();
2106 /* Although the actions of these functions are language-independent,
2107 they use optabs, so we cannot call them from backend_init. */
2111 expand_dummy_function_end ();
2114 /* Language-dependent initialization. Returns nonzero on success. */
2116 lang_dependent_init (const char *name)
2118 location_t save_loc = input_location;
2119 if (dump_base_name == 0)
2120 dump_base_name = name && name[0] ? name : "gccdump";
2122 /* Other front-end initialization. */
2123 input_location = BUILTINS_LOCATION;
2124 if (lang_hooks.init () == 0)
2126 input_location = save_loc;
2128 init_asm_output (name);
2130 /* This creates various _DECL nodes, so needs to be called after the
2131 front end is initialized. */
2134 /* Do the target-specific parts of the initialization. */
2135 lang_dependent_init_target ();
2137 /* If dbx symbol table desired, initialize writing it and output the
2138 predefined types. */
2139 timevar_push (TV_SYMOUT);
2141 #if defined DWARF2_DEBUGGING_INFO || defined DWARF2_UNWIND_INFO
2142 if (dwarf2out_do_frame ())
2143 dwarf2out_frame_init ();
2146 /* Now we have the correct original filename, we can initialize
2148 (*debug_hooks->init) (name);
2150 timevar_pop (TV_SYMOUT);
2156 /* Reinitialize everything when target parameters, such as register usage,
2159 target_reinit (void)
2161 /* Reinitialize RTL backend. */
2162 backend_init_target ();
2164 /* Reinitialize lang-dependent parts. */
2165 lang_dependent_init_target ();
2169 dump_memory_report (bool final)
2171 ggc_print_statistics ();
2172 stringpool_statistics ();
2173 dump_tree_statistics ();
2174 dump_gimple_statistics ();
2175 dump_rtx_statistics ();
2176 dump_varray_statistics ();
2177 dump_alloc_pool_statistics ();
2178 dump_bitmap_statistics ();
2179 dump_vec_loc_statistics ();
2180 dump_ggc_loc_statistics (final);
2181 dump_alias_stats (stderr);
2182 dump_pta_stats (stderr);
2185 /* Clean up: close opened files, etc. */
2190 /* Close the dump files. */
2191 if (flag_gen_aux_info)
2193 fclose (aux_info_file);
2195 unlink (aux_info_file_name);
2198 /* Close non-debugging input and output files. Take special care to note
2199 whether fclose returns an error, since the pages might still be on the
2200 buffer chain while the file is open. */
2204 if (ferror (asm_out_file) != 0)
2205 fatal_error ("error writing to %s: %m", asm_file_name);
2206 if (fclose (asm_out_file) != 0)
2207 fatal_error ("error closing %s: %m", asm_file_name);
2211 finish_optimization_passes ();
2216 dump_memory_report (true);
2218 /* Language-specific end of compilation actions. */
2219 lang_hooks.finish ();
2222 /* Initialize the compiler, and compile the input file. */
2226 /* Initialize timing first. The C front ends read the main file in
2227 the post_options hook, and C++ does file timings. */
2228 if (time_report || !quiet_flag || flag_detailed_statistics)
2230 timevar_start (TV_TOTAL);
2234 /* Don't do any more if an error has already occurred. */
2237 /* This must be run always, because it is needed to compute the FP
2238 predefined macros, such as __LDBL_MAX__, for targets using non
2239 default FP formats. */
2240 init_adjust_machine_modes ();
2242 /* Set up the back-end if requested. */
2246 /* Language-dependent initialization. Returns true on success. */
2247 if (lang_dependent_init (main_input_filename))
2252 /* Invoke registered plugin callbacks. */
2253 invoke_plugin_callbacks (PLUGIN_FINISH_UNIT, NULL);
2256 /* Stop timing and print the times. */
2257 timevar_stop (TV_TOTAL);
2258 timevar_print (stderr);
2261 /* Entry point of cc1, cc1plus, jc1, f771, etc.
2262 Exit code is FATAL_EXIT_CODE if can't open files or if there were
2263 any errors, or SUCCESS_EXIT_CODE if compilation succeeded.
2265 It is not safe to call this function more than once. */
2268 toplev_main (int argc, char **argv)
2270 expandargv (&argc, &argv);
2272 save_argv = (const char **) argv;
2274 /* Initialization of GCC's environment, and diagnostics. */
2275 general_init (argv[0]);
2277 /* Parse the options and do minimal processing; basically just
2278 enough to default flags appropriately. */
2279 decode_options (argc, (const char **) argv);
2283 initialize_plugins ();
2286 print_version (stderr, "");
2289 print_plugins_help (stderr, "");
2291 /* Exit early if we can (e.g. -help). */
2292 if (!exit_after_options)
2295 if (warningcount || errorcount)
2296 print_ignored_options ();
2298 /* Invoke registered plugin callbacks if any. */
2299 invoke_plugin_callbacks (PLUGIN_FINISH, NULL);
2301 finalize_plugins ();
2302 if (errorcount || sorrycount)
2303 return (FATAL_EXIT_CODE);
2305 return (SUCCESS_EXIT_CODE);