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
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 2, 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 COPYING. If not, write to the Free
20 Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
23 /* This is the top level of cc1/c++.
24 It parses command args, opens files, invokes the various passes
25 in the proper order, and counts the time used by each.
26 Error messages and low-level interface to malloc also handled here. */
29 #undef FLOAT /* This is for hpux. They should change hpux. */
30 #undef FFS /* Some systems define this in param.h. */
32 #include "coretypes.h"
36 #ifdef HAVE_SYS_RESOURCE_H
37 # include <sys/resource.h>
40 #ifdef HAVE_SYS_TIMES_H
41 # include <sys/times.h>
51 #include "insn-attr.h"
52 #include "insn-config.h"
53 #include "insn-flags.h"
54 #include "hard-reg-set.h"
61 #include "basic-block.h"
67 #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 #if defined (DWARF2_UNWIND_INFO) || defined (DWARF2_DEBUGGING_INFO)
88 #include "dwarf2out.h"
91 #if defined(DBX_DEBUGGING_INFO) || defined(XCOFF_DEBUGGING_INFO)
95 #ifdef SDB_DEBUGGING_INFO
99 #ifdef XCOFF_DEBUGGING_INFO
100 #include "xcoffout.h" /* Needed for external data
101 declarations for e.g. AIX 4.x. */
104 static void general_init (const char *);
105 static void do_compile (void);
106 static void process_options (void);
107 static void backend_init (void);
108 static int lang_dependent_init (const char *);
109 static void init_asm_output (const char *);
110 static void finalize (void);
112 static void crash_signal (int) ATTRIBUTE_NORETURN;
113 static void setup_core_dumping (void);
114 static void compile_file (void);
116 /* Nonzero to dump debug info whilst parsing (-dy option). */
117 static int set_yydebug;
119 /* True if we don't need a backend (e.g. preprocessing only). */
120 static bool no_backend;
122 /* Length of line when printing switch values. */
125 /* Name of program invoked, sans directories. */
127 const char *progname;
129 /* Copy of argument vector to toplev_main. */
130 static const char **save_argv;
132 /* Name of top-level original source file (what was input to cpp).
133 This comes from the #-command at the beginning of the actual input.
134 If there isn't any there, then this is the cc1 input file name. */
136 const char *main_input_filename;
138 #ifndef USE_MAPPED_LOCATION
139 location_t unknown_location = { NULL, 0 };
142 /* Used to enable -fvar-tracking, -fweb and -frename-registers according
143 to optimize and default_debug_hooks in process_options (). */
144 #define AUTODETECT_VALUE 2
146 /* Current position in real source file. */
148 location_t input_location;
150 struct line_maps line_table;
152 /* Stack of currently pending input files. */
154 struct file_stack *input_file_stack;
156 /* Incremented on each change to input_file_stack. */
157 int input_file_stack_tick;
159 /* Record of input_file_stack at each tick. */
160 typedef struct file_stack *fs_p;
162 DEF_VEC_ALLOC_P(fs_p,heap);
163 static VEC(fs_p,heap) *input_file_stack_history;
165 /* Whether input_file_stack has been restored to a previous state (in
166 which case there should be no more pushing). */
167 static bool input_file_stack_restored;
169 /* Name to use as base of names for dump output files. */
171 const char *dump_base_name;
173 /* Name to use as a base for auxiliary output files. */
175 const char *aux_base_name;
177 /* Bit flags that specify the machine subtype we are compiling for.
178 Bits are tested using macros TARGET_... defined in the tm.h file
179 and set by `-m...' switches. Must be defined in rtlanal.c. */
181 extern int target_flags;
183 /* A mask of target_flags that includes bit X if X was set or cleared
184 on the command line. */
186 int target_flags_explicit;
188 /* Debug hooks - dependent upon command line options. */
190 const struct gcc_debug_hooks *debug_hooks;
192 /* Debug hooks - target default. */
194 static const struct gcc_debug_hooks *default_debug_hooks;
196 /* Other flags saying which kinds of debugging dump have been requested. */
198 int rtl_dump_and_exit;
199 int flag_print_asm_name;
200 enum graph_dump_types graph_dump_format;
202 /* Name for output file of assembly code, specified with -o. */
204 const char *asm_file_name;
206 /* Nonzero means do optimizations. -O.
207 Particular numeric values stand for particular amounts of optimization;
208 thus, -O2 stores 2 here. However, the optimizations beyond the basic
209 ones are not controlled directly by this variable. Instead, they are
210 controlled by individual `flag_...' variables that are defaulted
211 based on this variable. */
215 /* Nonzero means optimize for size. -Os.
216 The only valid values are zero and nonzero. When optimize_size is
217 nonzero, optimize defaults to 2, but certain individual code
218 bloating optimizations are disabled. */
220 int optimize_size = 0;
222 /* The FUNCTION_DECL for the function currently being compiled,
223 or 0 if between functions. */
224 tree current_function_decl;
226 /* Set to the FUNC_BEGIN label of the current function, or NULL
228 const char * current_function_func_begin_label;
230 /* Temporarily suppress certain warnings.
231 This is set while reading code from a system header file. */
233 int in_system_header = 0;
235 /* Nonzero means to collect statistics which might be expensive
236 and to print them when we are done. */
237 int flag_detailed_statistics = 0;
239 /* A random sequence of characters, unless overridden by user. */
240 static const char *flag_random_seed;
242 /* A local time stamp derived from the time of compilation. It will be
243 zero if the system cannot provide a time. It will be -1u, if the
244 user has specified a particular random seed. */
249 /* Nonzero means `char' should be signed. */
251 int flag_signed_char;
253 /* Nonzero means give an enum type only as many bytes as it needs. A value
254 of 2 means it has not yet been initialized. */
256 int flag_short_enums;
258 /* Nonzero if structures and unions should be returned in memory.
260 This should only be defined if compatibility with another compiler or
261 with an ABI is needed, because it results in slower code. */
263 #ifndef DEFAULT_PCC_STRUCT_RETURN
264 #define DEFAULT_PCC_STRUCT_RETURN 1
267 /* Nonzero for -fpcc-struct-return: return values the same way PCC does. */
269 int flag_pcc_struct_return = DEFAULT_PCC_STRUCT_RETURN;
271 /* 0 means straightforward implementation of complex divide acceptable.
272 1 means wide ranges of inputs must work for complex divide.
273 2 means C99-like requirements for complex multiply and divide. */
275 int flag_complex_method = 1;
277 /* Nonzero means that we don't want inlining by virtue of -fno-inline,
278 not just because the tree inliner turned us off. */
280 int flag_really_no_inline = 2;
282 /* Nonzero means we should be saving declaration info into a .X file. */
284 int flag_gen_aux_info = 0;
286 /* Specified name of aux-info file. */
288 const char *aux_info_file_name;
290 /* Nonzero if we are compiling code for a shared library, zero for
295 /* Generate code for GNU or NeXT Objective-C runtime environment. */
297 #ifdef NEXT_OBJC_RUNTIME
298 int flag_next_runtime = 1;
300 int flag_next_runtime = 0;
303 /* Set to the default thread-local storage (tls) model to use. */
305 enum tls_model flag_tls_default = TLS_MODEL_GLOBAL_DYNAMIC;
307 /* Nonzero means change certain warnings into errors.
308 Usually these are warnings about failure to conform to some standard. */
310 int flag_pedantic_errors = 0;
312 /* -dA causes debug commentary information to be produced in
313 the generated assembly code (to make it more readable). This option
314 is generally only of use to those who actually need to read the
315 generated assembly code (perhaps while debugging the compiler itself).
316 Currently, this switch is only used by dwarfout.c; however, it is intended
317 to be a catchall for printing debug information in the assembler file. */
319 int flag_debug_asm = 0;
321 /* -dP causes the rtl to be emitted as a comment in assembly. */
323 int flag_dump_rtl_in_asm = 0;
325 /* When non-NULL, indicates that whenever space is allocated on the
326 stack, the resulting stack pointer must not pass this
327 address---that is, for stacks that grow downward, the stack pointer
328 must always be greater than or equal to this address; for stacks
329 that grow upward, the stack pointer must be less than this address.
330 At present, the rtx may be either a REG or a SYMBOL_REF, although
331 the support provided depends on the backend. */
334 /* Nonzero if we should track variables. When
335 flag_var_tracking == AUTODETECT_VALUE it will be set according
336 to optimize, debug_info_level and debug_hooks in process_options (). */
337 int flag_var_tracking = AUTODETECT_VALUE;
339 /* True if the user has tagged the function with the 'section'
342 bool user_defined_section_attribute = false;
344 /* Values of the -falign-* flags: how much to align labels in code.
345 0 means `use default', 1 means `don't align'.
346 For each variable, there is an _log variant which is the power
347 of two not less than the variable, for .align output. */
350 int align_loops_max_skip;
352 int align_jumps_max_skip;
353 int align_labels_log;
354 int align_labels_max_skip;
355 int align_functions_log;
359 const char *const string;
363 lang_independent_options;
365 /* Nonzero if subexpressions must be evaluated from left-to-right. */
366 int flag_evaluation_order = 0;
368 /* The user symbol prefix after having resolved same. */
369 const char *user_label_prefix;
371 static const param_info lang_independent_params[] = {
372 #define DEFPARAM(ENUM, OPTION, HELP, DEFAULT, MIN, MAX) \
373 { OPTION, DEFAULT, false, MIN, MAX, HELP },
374 #include "params.def"
376 { NULL, 0, false, 0, 0, NULL }
379 /* Output files for assembler code (real compiler output)
380 and debugging dumps. */
384 FILE *dump_file = NULL;
385 const char *dump_file_name;
387 /* The current working directory of a translation. It's generally the
388 directory from which compilation was initiated, but a preprocessed
389 file may specify the original directory in which it was
392 static const char *src_pwd;
394 /* Initialize src_pwd with the given string, and return true. If it
395 was already initialized, return false. As a special case, it may
396 be called with a NULL argument to test whether src_pwd has NOT been
400 set_src_pwd (const char *pwd)
404 if (strcmp (src_pwd, pwd) == 0)
410 src_pwd = xstrdup (pwd);
414 /* Return the directory from which the translation unit was initiated,
415 in case set_src_pwd() was not called before to assign it a
431 /* Called when the start of a function definition is parsed,
432 this function prints on stderr the name of the function. */
434 announce_function (tree decl)
438 if (rtl_dump_and_exit)
439 fprintf (stderr, "%s ", IDENTIFIER_POINTER (DECL_NAME (decl)));
441 fprintf (stderr, " %s", lang_hooks.decl_printable_name (decl, 2));
443 pp_needs_newline (global_dc->printer) = true;
444 diagnostic_set_last_function (global_dc);
448 /* Initialize local_tick with the time of day, or -1 if
449 flag_random_seed is set. */
452 init_local_tick (void)
454 if (!flag_random_seed)
456 /* Get some more or less random data. */
457 #ifdef HAVE_GETTIMEOFDAY
461 gettimeofday (&tv, NULL);
462 local_tick = tv.tv_sec * 1000 + tv.tv_usec / 1000;
466 time_t now = time (NULL);
468 if (now != (time_t)-1)
469 local_tick = (unsigned) now;
477 /* Set up a default flag_random_seed and local_tick, unless the user
478 already specified one. Must be called after init_local_tick. */
481 init_random_seed (void)
483 unsigned HOST_WIDE_INT value;
484 static char random_seed[HOST_BITS_PER_WIDE_INT / 4 + 3];
486 value = local_tick ^ getpid ();
488 sprintf (random_seed, HOST_WIDE_INT_PRINT_HEX, value);
489 flag_random_seed = random_seed;
492 /* Obtain the random_seed string. Unless NOINIT, initialize it if
493 it's not provided in the command line. */
496 get_random_seed (bool noinit)
498 if (!flag_random_seed && !noinit)
500 return flag_random_seed;
503 /* Modify the random_seed string to VAL. Return its previous
507 set_random_seed (const char *val)
509 const char *old = flag_random_seed;
510 flag_random_seed = val;
514 /* Decode the string P as an integral parameter.
515 If the string is indeed an integer return its numeric value else
516 issue an Invalid Option error for the option PNAME and return DEFVAL.
517 If PNAME is zero just return DEFVAL, do not call error. */
520 read_integral_parameter (const char *p, const char *pname, const int defval)
522 const char *endp = p;
535 error ("invalid option argument %qs", pname);
542 /* When compiling with a recent enough GCC, we use the GNU C "extern inline"
543 for floor_log2 and exact_log2; see toplev.h. That construct, however,
544 conflicts with the ISO C++ One Definition Rule. */
546 #if GCC_VERSION < 3004 || !defined (__cplusplus)
548 /* Given X, an unsigned number, return the largest int Y such that 2**Y <= X.
549 If X is 0, return -1. */
552 floor_log2 (unsigned HOST_WIDE_INT x)
560 t = HOST_BITS_PER_WIDE_INT - 1 - (int) CLZ_HWI (x);
562 if (HOST_BITS_PER_WIDE_INT > 64)
563 if (x >= (unsigned HOST_WIDE_INT) 1 << (t + 64))
565 if (HOST_BITS_PER_WIDE_INT > 32)
566 if (x >= ((unsigned HOST_WIDE_INT) 1) << (t + 32))
568 if (x >= ((unsigned HOST_WIDE_INT) 1) << (t + 16))
570 if (x >= ((unsigned HOST_WIDE_INT) 1) << (t + 8))
572 if (x >= ((unsigned HOST_WIDE_INT) 1) << (t + 4))
574 if (x >= ((unsigned HOST_WIDE_INT) 1) << (t + 2))
576 if (x >= ((unsigned HOST_WIDE_INT) 1) << (t + 1))
583 /* Return the logarithm of X, base 2, considering X unsigned,
584 if X is a power of 2. Otherwise, returns -1. */
587 exact_log2 (unsigned HOST_WIDE_INT x)
592 return x ? CTZ_HWI (x) : -1;
594 return floor_log2 (x);
598 #endif /* GCC_VERSION < 3004 || !defined (__cplusplus) */
600 /* Handler for fatal signals, such as SIGSEGV. These are transformed
601 into ICE messages, which is much more user friendly. In case the
602 error printer crashes, reset the signal to prevent infinite recursion. */
605 crash_signal (int signo)
607 signal (signo, SIG_DFL);
609 /* If we crashed while processing an ASM statement, then be a little more
610 graceful. It's most likely the user's fault. */
611 if (this_is_asm_operands)
613 output_operand_lossage ("unrecoverable error");
614 exit (FATAL_EXIT_CODE);
617 internal_error ("%s", strsignal (signo));
620 /* Arrange to dump core on error. (The regular error message is still
621 printed first, except in the case of abort().) */
624 setup_core_dumping (void)
627 signal (SIGABRT, SIG_DFL);
629 #if defined(HAVE_SETRLIMIT)
632 if (getrlimit (RLIMIT_CORE, &rlim) != 0)
633 fatal_error ("getting core file size maximum limit: %m");
634 rlim.rlim_cur = rlim.rlim_max;
635 if (setrlimit (RLIMIT_CORE, &rlim) != 0)
636 fatal_error ("setting core file size limit to maximum: %m");
639 diagnostic_abort_on_error (global_dc);
643 /* Strip off a legitimate source ending from the input string NAME of
644 length LEN. Rather than having to know the names used by all of
645 our front ends, we strip off an ending of a period followed by
646 up to five characters. (Java uses ".class".) */
649 strip_off_ending (char *name, int len)
652 for (i = 2; i < 6 && len > i; i++)
654 if (name[len - i] == '.')
656 name[len - i] = '\0';
662 /* Output a quoted string. */
665 output_quoted_string (FILE *asm_file, const char *string)
667 #ifdef OUTPUT_QUOTED_STRING
668 OUTPUT_QUOTED_STRING (asm_file, string);
672 putc ('\"', asm_file);
673 while ((c = *string++) != 0)
677 if (c == '\"' || c == '\\')
678 putc ('\\', asm_file);
682 fprintf (asm_file, "\\%03o", (unsigned char) c);
684 putc ('\"', asm_file);
688 /* Output a file name in the form wanted by System V. */
691 output_file_directive (FILE *asm_file, const char *input_name)
696 if (input_name == NULL)
697 input_name = "<stdin>";
699 len = strlen (input_name);
700 na = input_name + len;
702 /* NA gets INPUT_NAME sans directory names. */
703 while (na > input_name)
705 if (IS_DIR_SEPARATOR (na[-1]))
710 #ifdef ASM_OUTPUT_SOURCE_FILENAME
711 ASM_OUTPUT_SOURCE_FILENAME (asm_file, na);
713 fprintf (asm_file, "\t.file\t");
714 output_quoted_string (asm_file, na);
715 fputc ('\n', asm_file);
719 /* A subroutine of wrapup_global_declarations. We've come to the end of
720 the compilation unit. All deferred variables should be undeferred,
721 and all incomplete decls should be finalized. */
724 wrapup_global_declaration_1 (tree decl)
726 /* We're not deferring this any longer. Assignment is conditional to
727 avoid needlessly dirtying PCH pages. */
728 if (CODE_CONTAINS_STRUCT (TREE_CODE (decl), TS_DECL_WITH_VIS)
729 && DECL_DEFER_OUTPUT (decl) != 0)
730 DECL_DEFER_OUTPUT (decl) = 0;
732 if (TREE_CODE (decl) == VAR_DECL && DECL_SIZE (decl) == 0)
733 lang_hooks.finish_incomplete_decl (decl);
736 /* A subroutine of wrapup_global_declarations. Decide whether or not DECL
737 needs to be output. Return true if it is output. */
740 wrapup_global_declaration_2 (tree decl)
742 if (TREE_ASM_WRITTEN (decl) || DECL_EXTERNAL (decl))
745 /* Don't write out static consts, unless we still need them.
747 We also keep static consts if not optimizing (for debugging),
748 unless the user specified -fno-keep-static-consts.
749 ??? They might be better written into the debug information.
750 This is possible when using DWARF.
752 A language processor that wants static constants to be always
753 written out (even if it is not used) is responsible for
754 calling rest_of_decl_compilation itself. E.g. the C front-end
755 calls rest_of_decl_compilation from finish_decl.
756 One motivation for this is that is conventional in some
757 environments to write things like:
758 static const char rcsid[] = "... version string ...";
759 intending to force the string to be in the executable.
761 A language processor that would prefer to have unneeded
762 static constants "optimized away" would just defer writing
763 them out until here. E.g. C++ does this, because static
764 constants are often defined in header files.
766 ??? A tempting alternative (for both C and C++) would be
767 to force a constant to be written if and only if it is
768 defined in a main file, as opposed to an include file. */
770 if (TREE_CODE (decl) == VAR_DECL && TREE_STATIC (decl))
772 struct varpool_node *node;
774 node = varpool_node (decl);
778 else if (node->alias)
780 else if (!cgraph_global_info_ready
782 || TREE_USED (DECL_ASSEMBLER_NAME (decl))))
784 else if (node->needed)
786 else if (DECL_COMDAT (decl))
788 else if (TREE_READONLY (decl) && !TREE_PUBLIC (decl)
789 && (optimize || !flag_keep_static_consts
790 || DECL_ARTIFICIAL (decl)))
795 rest_of_decl_compilation (decl, 1, 1);
803 /* Do any final processing required for the declarations in VEC, of
804 which there are LEN. We write out inline functions and variables
805 that have been deferred until this point, but which are required.
806 Returns nonzero if anything was put out. */
809 wrapup_global_declarations (tree *vec, int len)
811 bool reconsider, output_something = false;
814 for (i = 0; i < len; i++)
815 wrapup_global_declaration_1 (vec[i]);
817 /* Now emit any global variables or functions that we have been
818 putting off. We need to loop in case one of the things emitted
819 here references another one which comes earlier in the list. */
823 for (i = 0; i < len; i++)
824 reconsider |= wrapup_global_declaration_2 (vec[i]);
826 output_something = true;
830 return output_something;
833 /* A subroutine of check_global_declarations. Issue appropriate warnings
834 for the global declaration DECL. */
837 check_global_declaration_1 (tree decl)
839 /* Warn about any function declared static but not defined. We don't
840 warn about variables, because many programs have static variables
841 that exist only to get some text into the object file. */
842 if (TREE_CODE (decl) == FUNCTION_DECL
843 && DECL_INITIAL (decl) == 0
844 && DECL_EXTERNAL (decl)
845 && ! DECL_ARTIFICIAL (decl)
846 && ! TREE_NO_WARNING (decl)
847 && ! TREE_PUBLIC (decl)
848 && (warn_unused_function
849 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl))))
851 if (TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl)))
852 pedwarn ("%q+F used but never defined", decl);
854 warning (0, "%q+F declared %<static%> but never defined", decl);
855 /* This symbol is effectively an "extern" declaration now. */
856 TREE_PUBLIC (decl) = 1;
857 assemble_external (decl);
860 /* Warn about static fns or vars defined but not used. */
861 if (((warn_unused_function && TREE_CODE (decl) == FUNCTION_DECL)
862 /* We don't warn about "static const" variables because the
863 "rcs_id" idiom uses that construction. */
864 || (warn_unused_variable
865 && TREE_CODE (decl) == VAR_DECL && ! TREE_READONLY (decl)))
866 && ! DECL_IN_SYSTEM_HEADER (decl)
867 && ! TREE_USED (decl)
868 /* The TREE_USED bit for file-scope decls is kept in the identifier,
869 to handle multiple external decls in different scopes. */
870 && ! (DECL_NAME (decl) && TREE_USED (DECL_NAME (decl)))
871 && ! DECL_EXTERNAL (decl)
872 && ! TREE_PUBLIC (decl)
873 /* A volatile variable might be used in some non-obvious way. */
874 && ! TREE_THIS_VOLATILE (decl)
875 /* Global register variables must be declared to reserve them. */
876 && ! (TREE_CODE (decl) == VAR_DECL && DECL_REGISTER (decl))
877 /* Otherwise, ask the language. */
878 && lang_hooks.decls.warn_unused_global (decl))
879 warning (0, "%q+D defined but not used", decl);
882 /* Issue appropriate warnings for the global declarations in VEC (of
883 which there are LEN). */
886 check_global_declarations (tree *vec, int len)
890 for (i = 0; i < len; i++)
891 check_global_declaration_1 (vec[i]);
894 /* Emit debugging information for all global declarations in VEC. */
897 emit_debug_global_declarations (tree *vec, int len)
901 /* Avoid confusing the debug information machinery when there are errors. */
902 if (errorcount != 0 || sorrycount != 0)
905 timevar_push (TV_SYMOUT);
906 for (i = 0; i < len; i++)
907 debug_hooks->global_decl (vec[i]);
908 timevar_pop (TV_SYMOUT);
911 /* Warn about a use of an identifier which was marked deprecated. */
913 warn_deprecated_use (tree node)
915 if (node == 0 || !warn_deprecated_decl)
920 expanded_location xloc = expand_location (DECL_SOURCE_LOCATION (node));
921 warning (OPT_Wdeprecated_declarations,
922 "%qD is deprecated (declared at %s:%d)",
923 node, xloc.file, xloc.line);
925 else if (TYPE_P (node))
927 const char *what = NULL;
928 tree decl = TYPE_STUB_DECL (node);
930 if (TYPE_NAME (node))
932 if (TREE_CODE (TYPE_NAME (node)) == IDENTIFIER_NODE)
933 what = IDENTIFIER_POINTER (TYPE_NAME (node));
934 else if (TREE_CODE (TYPE_NAME (node)) == TYPE_DECL
935 && DECL_NAME (TYPE_NAME (node)))
936 what = IDENTIFIER_POINTER (DECL_NAME (TYPE_NAME (node)));
941 expanded_location xloc
942 = expand_location (DECL_SOURCE_LOCATION (decl));
944 warning (OPT_Wdeprecated_declarations,
945 "%qs is deprecated (declared at %s:%d)", what,
946 xloc.file, xloc.line);
948 warning (OPT_Wdeprecated_declarations,
949 "type is deprecated (declared at %s:%d)",
950 xloc.file, xloc.line);
955 warning (OPT_Wdeprecated_declarations, "%qs is deprecated", what);
957 warning (OPT_Wdeprecated_declarations, "type is deprecated");
962 /* Save the current INPUT_LOCATION on the top entry in the
963 INPUT_FILE_STACK. Push a new entry for FILE and LINE, and set the
964 INPUT_LOCATION accordingly. */
967 #ifdef USE_MAPPED_LOCATION
968 push_srcloc (location_t fline)
970 push_srcloc (const char *file, int line)
973 struct file_stack *fs;
975 gcc_assert (!input_file_stack_restored);
976 if (input_file_stack_tick == (int) ((1U << INPUT_FILE_STACK_BITS) - 1))
977 sorry ("GCC supports only %d input file changes", input_file_stack_tick);
979 fs = XNEW (struct file_stack);
980 fs->location = input_location;
981 fs->next = input_file_stack;
982 #ifdef USE_MAPPED_LOCATION
983 input_location = fline;
985 input_filename = file;
988 input_file_stack = fs;
989 input_file_stack_tick++;
990 VEC_safe_push (fs_p, heap, input_file_stack_history, input_file_stack);
993 /* Pop the top entry off the stack of presently open source files.
994 Restore the INPUT_LOCATION from the new topmost entry on the
1000 struct file_stack *fs;
1002 gcc_assert (!input_file_stack_restored);
1003 if (input_file_stack_tick == (int) ((1U << INPUT_FILE_STACK_BITS) - 1))
1004 sorry ("GCC supports only %d input file changes", input_file_stack_tick);
1006 fs = input_file_stack;
1007 input_location = fs->location;
1008 input_file_stack = fs->next;
1009 input_file_stack_tick++;
1010 VEC_safe_push (fs_p, heap, input_file_stack_history, input_file_stack);
1013 /* Restore the input file stack to its state as of TICK, for the sake
1014 of diagnostics after processing the whole input. Once this has
1015 been called, push_srcloc and pop_srcloc may no longer be
1018 restore_input_file_stack (int tick)
1021 input_file_stack = NULL;
1023 input_file_stack = VEC_index (fs_p, input_file_stack_history, tick - 1);
1024 input_file_stack_tick = tick;
1025 input_file_stack_restored = true;
1028 /* Compile an entire translation unit. Write a file of assembly
1029 output and various debugging dumps. */
1034 /* Initialize yet another pass. */
1037 init_final (main_input_filename);
1038 coverage_init (aux_base_name);
1040 timevar_push (TV_PARSE);
1042 /* Call the parser, which parses the entire file (calling
1043 rest_of_compilation for each function). */
1044 lang_hooks.parse_file (set_yydebug);
1046 /* In case there were missing block closers,
1047 get us back to the global binding level. */
1048 lang_hooks.clear_binding_stack ();
1050 /* Compilation is now finished except for writing
1051 what's left of the symbol table output. */
1052 timevar_pop (TV_PARSE);
1054 if (flag_syntax_only)
1057 lang_hooks.decls.final_write_globals ();
1059 if (errorcount || sorrycount)
1062 varpool_assemble_pending_decls ();
1063 finish_aliases_2 ();
1065 /* This must occur after the loop to output deferred functions.
1066 Else the coverage initializer would not be emitted if all the
1067 functions in this compilation unit were deferred. */
1070 /* Likewise for mudflap static object registrations. */
1072 mudflap_finish_file ();
1074 /* Likewise for emulated thread-local storage. */
1075 if (!targetm.have_tls)
1078 output_shared_constant_pool ();
1079 output_object_blocks ();
1081 /* Write out any pending weak symbol declarations. */
1084 /* Do dbx symbols. */
1085 timevar_push (TV_SYMOUT);
1087 #if defined DWARF2_DEBUGGING_INFO || defined DWARF2_UNWIND_INFO
1088 if (dwarf2out_do_frame ())
1089 dwarf2out_frame_finish ();
1092 (*debug_hooks->finish) (main_input_filename);
1093 timevar_pop (TV_SYMOUT);
1095 /* Output some stuff at end of file if nec. */
1097 dw2_output_indirect_constants ();
1099 /* Flush any pending external directives. */
1100 process_pending_assemble_externals ();
1102 /* Attach a special .ident directive to the end of the file to identify
1103 the version of GCC which compiled this code. The format of the .ident
1104 string is patterned after the ones produced by native SVR4 compilers. */
1107 fprintf (asm_out_file, "%s\"GCC: (GNU) %s\"\n",
1108 IDENT_ASM_OP, version_string);
1111 /* This must be at the end. Some target ports emit end of file directives
1112 into the assembly file here, and hence we can not output anything to the
1113 assembly file after this point. */
1114 targetm.asm_out.file_end ();
1117 /* Parse a -d... command line switch. */
1120 decode_d_option (const char *arg)
1131 flag_print_asm_name = 1;
1134 flag_dump_rtl_in_asm = 1;
1135 flag_print_asm_name = 1;
1138 graph_dump_format = vcg;
1141 rtl_dump_and_exit = 1;
1146 case 'D': /* These are handled by the preprocessor. */
1150 setup_core_dumping();
1155 if (!enable_rtl_dump_file (c))
1156 warning (0, "unrecognized gcc debugging option: %c", c);
1161 /* Indexed by enum debug_info_type. */
1162 const char *const debug_type_names[] =
1164 "none", "stabs", "coff", "dwarf-2", "xcoff", "vms"
1167 /* Print version information to FILE.
1168 Each line begins with INDENT (for the case where FILE is the
1169 assembler output file). */
1172 print_version (FILE *file, const char *indent)
1174 static const char fmt1[] =
1176 N_("%s%s%s version %s (%s)\n%s\tcompiled by GNU C version %s, ")
1178 N_("%s%s%s version %s (%s) compiled by CC, ")
1181 static const char fmt2[] =
1182 N_("GMP version %s, MPFR version %s.\n");
1183 static const char fmt3[] =
1184 N_("warning: %s header version %s differs from library version %s.\n");
1185 static const char fmt4[] =
1186 N_("%s%sGGC heuristics: --param ggc-min-expand=%d --param ggc-min-heapsize=%d\n");
1188 #define __VERSION__ "[?]"
1191 file == stderr ? _(fmt1) : fmt1,
1192 indent, *indent != 0 ? " " : "",
1193 lang_hooks.name, version_string, TARGET_NAME,
1194 indent, __VERSION__);
1196 /* We need to stringify the GMP macro values. Ugh, gmp_version has
1197 two string formats, "i.j.k" and "i.j" when k is zero. */
1198 #define GCC_GMP_STRINGIFY_VERSION3(X) #X
1199 #define GCC_GMP_STRINGIFY_VERSION2(X) GCC_GMP_STRINGIFY_VERSION3(X)
1200 #if __GNU_MP_VERSION_PATCHLEVEL == 0
1201 #define GCC_GMP_STRINGIFY_VERSION GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION) "." \
1202 GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION_MINOR)
1204 #define GCC_GMP_STRINGIFY_VERSION GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION) "." \
1205 GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION_MINOR) "." \
1206 GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION_PATCHLEVEL)
1209 file == stderr ? _(fmt2) : fmt2,
1210 GCC_GMP_STRINGIFY_VERSION, MPFR_VERSION_STRING);
1211 if (strcmp (GCC_GMP_STRINGIFY_VERSION, gmp_version))
1213 file == stderr ? _(fmt3) : fmt3,
1214 "GMP", GCC_GMP_STRINGIFY_VERSION, gmp_version);
1215 if (strcmp (MPFR_VERSION_STRING, mpfr_get_version ()))
1217 file == stderr ? _(fmt3) : fmt3,
1218 "MPFR", MPFR_VERSION_STRING, mpfr_get_version ());
1220 file == stderr ? _(fmt4) : fmt4,
1221 indent, *indent != 0 ? " " : "",
1222 PARAM_VALUE (GGC_MIN_EXPAND), PARAM_VALUE (GGC_MIN_HEAPSIZE));
1225 #ifdef ASM_COMMENT_START
1227 print_to_asm_out_file (print_switch_type type, const char * text)
1229 bool prepend_sep = true;
1233 case SWITCH_TYPE_LINE_END:
1234 putc ('\n', asm_out_file);
1237 case SWITCH_TYPE_LINE_START:
1238 fputs (ASM_COMMENT_START, asm_out_file);
1239 return strlen (ASM_COMMENT_START);
1241 case SWITCH_TYPE_DESCRIPTIVE:
1242 if (ASM_COMMENT_START[0] == 0)
1243 prepend_sep = false;
1245 case SWITCH_TYPE_PASSED:
1246 case SWITCH_TYPE_ENABLED:
1248 fputc (' ', asm_out_file);
1249 fprintf (asm_out_file, text);
1250 /* No need to return the length here as
1251 print_single_switch has already done it. */
1261 print_to_stderr (print_switch_type type, const char * text)
1265 case SWITCH_TYPE_LINE_END:
1266 putc ('\n', stderr);
1269 case SWITCH_TYPE_LINE_START:
1272 case SWITCH_TYPE_PASSED:
1273 case SWITCH_TYPE_ENABLED:
1274 fputc (' ', stderr);
1277 case SWITCH_TYPE_DESCRIPTIVE:
1278 fprintf (stderr, text);
1279 /* No need to return the length here as
1280 print_single_switch has already done it. */
1288 /* Print an option value and return the adjusted position in the line.
1289 ??? print_fn doesn't handle errors, eg disk full; presumably other
1290 code will catch a disk full though. */
1293 print_single_switch (print_switch_fn_type print_fn,
1295 print_switch_type type,
1298 /* The ultrix fprintf returns 0 on success, so compute the result
1299 we want here since we need it for the following test. The +1
1300 is for the separator character that will probably be emitted. */
1301 int len = strlen (text) + 1;
1304 && pos + len > MAX_LINE)
1306 print_fn (SWITCH_TYPE_LINE_END, NULL);
1311 pos += print_fn (SWITCH_TYPE_LINE_START, NULL);
1313 print_fn (type, text);
1317 /* Print active target switches using PRINT_FN.
1318 POS is the current cursor position and MAX is the size of a "line".
1319 Each line begins with INDENT and ends with TERM.
1320 Each switch is separated from the next by SEP. */
1323 print_switch_values (print_switch_fn_type print_fn)
1329 /* Fill in the -frandom-seed option, if the user didn't pass it, so
1330 that it can be printed below. This helps reproducibility. */
1331 if (!flag_random_seed)
1332 init_random_seed ();
1334 /* Print the options as passed. */
1335 pos = print_single_switch (print_fn, pos,
1336 SWITCH_TYPE_DESCRIPTIVE, _("options passed: "));
1338 for (p = &save_argv[1]; *p != NULL; p++)
1343 if (strcmp (*p, "-o") == 0
1344 || strcmp (*p, "-dumpbase") == 0
1345 || strcmp (*p, "-auxbase") == 0)
1352 if (strcmp (*p, "-quiet") == 0
1353 || strcmp (*p, "-version") == 0)
1360 pos = print_single_switch (print_fn, pos, SWITCH_TYPE_PASSED, *p);
1364 print_fn (SWITCH_TYPE_LINE_END, NULL);
1366 /* Print the -f and -m options that have been enabled.
1367 We don't handle language specific options but printing argv
1369 pos = print_single_switch (print_fn, 0,
1370 SWITCH_TYPE_DESCRIPTIVE, _("options enabled: "));
1372 for (j = 0; j < cl_options_count; j++)
1373 if ((cl_options[j].flags & CL_REPORT)
1374 && option_enabled (j) > 0)
1375 pos = print_single_switch (print_fn, pos,
1376 SWITCH_TYPE_ENABLED, cl_options[j].opt_text);
1378 print_fn (SWITCH_TYPE_LINE_END, NULL);
1381 /* Open assembly code output file. Do this even if -fsyntax-only is
1382 on, because then the driver will have provided the name of a
1383 temporary file or bit bucket for us. NAME is the file specified on
1384 the command line, possibly NULL. */
1386 init_asm_output (const char *name)
1388 if (name == NULL && asm_file_name == 0)
1389 asm_out_file = stdout;
1392 if (asm_file_name == 0)
1394 int len = strlen (dump_base_name);
1395 char *dumpname = XNEWVEC (char, len + 6);
1397 memcpy (dumpname, dump_base_name, len + 1);
1398 strip_off_ending (dumpname, len);
1399 strcat (dumpname, ".s");
1400 asm_file_name = dumpname;
1402 if (!strcmp (asm_file_name, "-"))
1403 asm_out_file = stdout;
1405 asm_out_file = fopen (asm_file_name, "w+b");
1406 if (asm_out_file == 0)
1407 fatal_error ("can%'t open %s for writing: %m", asm_file_name);
1410 if (!flag_syntax_only)
1412 targetm.asm_out.file_start ();
1414 if (flag_record_gcc_switches)
1416 if (targetm.asm_out.record_gcc_switches)
1418 /* Let the target know that we are about to start recording. */
1419 targetm.asm_out.record_gcc_switches (SWITCH_TYPE_DESCRIPTIVE,
1421 /* Now record the switches. */
1422 print_switch_values (targetm.asm_out.record_gcc_switches);
1423 /* Let the target know that the recording is over. */
1424 targetm.asm_out.record_gcc_switches (SWITCH_TYPE_DESCRIPTIVE,
1428 inform ("-frecord-gcc-switches is not supported by the current target");
1431 #ifdef ASM_COMMENT_START
1432 if (flag_verbose_asm)
1434 /* Print the list of switches in effect
1435 into the assembler file as comments. */
1436 print_version (asm_out_file, ASM_COMMENT_START);
1437 print_switch_values (print_to_asm_out_file);
1438 fprintf (asm_out_file, "\n");
1444 /* Return true if the state of option OPTION should be stored in PCH files
1445 and checked by default_pch_valid_p. Store the option's current state
1449 option_affects_pch_p (int option, struct cl_option_state *state)
1451 if ((cl_options[option].flags & CL_TARGET) == 0)
1453 if (cl_options[option].flag_var == &target_flags)
1454 if (targetm.check_pch_target_flags)
1456 return get_option_state (option, state);
1459 /* Default version of get_pch_validity.
1460 By default, every flag difference is fatal; that will be mostly right for
1461 most targets, but completely right for very few. */
1464 default_get_pch_validity (size_t *len)
1466 struct cl_option_state state;
1471 if (targetm.check_pch_target_flags)
1472 *len += sizeof (target_flags);
1473 for (i = 0; i < cl_options_count; i++)
1474 if (option_affects_pch_p (i, &state))
1477 result = r = XNEWVEC (char, *len);
1481 if (targetm.check_pch_target_flags)
1483 memcpy (r, &target_flags, sizeof (target_flags));
1484 r += sizeof (target_flags);
1487 for (i = 0; i < cl_options_count; i++)
1488 if (option_affects_pch_p (i, &state))
1490 memcpy (r, state.data, state.size);
1497 /* Return a message which says that a PCH file was created with a different
1498 setting of OPTION. */
1501 pch_option_mismatch (const char *option)
1505 asprintf (&r, _("created and used with differing settings of '%s'"), option);
1507 return _("out of memory");
1511 /* Default version of pch_valid_p. */
1514 default_pch_valid_p (const void *data_p, size_t len)
1516 struct cl_option_state state;
1517 const char *data = (const char *)data_p;
1520 /* -fpic and -fpie also usually make a PCH invalid. */
1521 if (data[0] != flag_pic)
1522 return _("created and used with different settings of -fpic");
1523 if (data[1] != flag_pie)
1524 return _("created and used with different settings of -fpie");
1527 /* Check target_flags. */
1528 if (targetm.check_pch_target_flags)
1533 memcpy (&tf, data, sizeof (target_flags));
1534 data += sizeof (target_flags);
1535 len -= sizeof (target_flags);
1536 r = targetm.check_pch_target_flags (tf);
1541 for (i = 0; i < cl_options_count; i++)
1542 if (option_affects_pch_p (i, &state))
1544 if (memcmp (data, state.data, state.size) != 0)
1545 return pch_option_mismatch (cl_options[i].opt_text);
1553 /* Default tree printer. Handles declarations only. */
1555 default_tree_printer (pretty_printer * pp, text_info *text, const char *spec,
1556 int precision, bool wide, bool set_locus, bool hash)
1560 /* FUTURE: %+x should set the locus. */
1561 if (precision != 0 || wide || hash)
1567 t = va_arg (*text->args_ptr, tree);
1568 if (DECL_DEBUG_EXPR_IS_FROM (t) && DECL_DEBUG_EXPR (t))
1569 t = DECL_DEBUG_EXPR (t);
1574 t = va_arg (*text->args_ptr, tree);
1581 if (set_locus && text->locus)
1582 *text->locus = DECL_SOURCE_LOCATION (t);
1586 const char *n = DECL_NAME (t)
1587 ? lang_hooks.decl_printable_name (t, 2)
1592 dump_generic_node (pp, t, 0, TDF_DIAGNOSTIC, 0);
1597 /* Initialization of the front end environment, before command line
1598 options are parsed. Signal handlers, internationalization etc.
1599 ARGV0 is main's argv[0]. */
1601 general_init (const char *argv0)
1605 p = argv0 + strlen (argv0);
1606 while (p != argv0 && !IS_DIR_SEPARATOR (p[-1]))
1610 xmalloc_set_program_name (progname);
1614 /* Unlock the stdio streams. */
1615 unlock_std_streams ();
1617 gcc_init_libintl ();
1619 /* Initialize the diagnostics reporting machinery, so option parsing
1620 can give warnings and errors. */
1621 diagnostic_initialize (global_dc);
1622 /* Set a default printer. Language specific initializations will
1623 override it later. */
1624 pp_format_decoder (global_dc->printer) = &default_tree_printer;
1626 /* Trap fatal signals, e.g. SIGSEGV, and convert them to ICE messages. */
1628 signal (SIGSEGV, crash_signal);
1631 signal (SIGILL, crash_signal);
1634 signal (SIGBUS, crash_signal);
1637 signal (SIGABRT, crash_signal);
1639 #if defined SIGIOT && (!defined SIGABRT || SIGABRT != SIGIOT)
1640 signal (SIGIOT, crash_signal);
1643 signal (SIGFPE, crash_signal);
1646 /* Other host-specific signal setup. */
1647 (*host_hooks.extra_signals)();
1649 /* Initialize the garbage-collector, string pools and tree type hash
1653 linemap_init (&line_table);
1656 /* Initialize register usage now so switches may override. */
1659 /* Register the language-independent parameters. */
1660 add_params (lang_independent_params, LAST_PARAM);
1662 /* This must be done after add_params but before argument processing. */
1663 init_ggc_heuristics();
1664 init_optimization_passes ();
1667 /* Return true if the current target supports -fsection-anchors. */
1670 target_supports_section_anchors_p (void)
1672 if (targetm.min_anchor_offset == 0 && targetm.max_anchor_offset == 0)
1675 if (targetm.asm_out.output_anchor == NULL)
1681 /* Process the options that have been parsed. */
1683 process_options (void)
1685 /* Just in case lang_hooks.post_options ends up calling a debug_hook.
1686 This can happen with incorrect pre-processed input. */
1687 debug_hooks = &do_nothing_debug_hooks;
1689 /* Allow the front end to perform consistency checks and do further
1690 initialization based on the command line options. This hook also
1691 sets the original filename if appropriate (e.g. foo.i -> foo.c)
1692 so we can correctly initialize debug output. */
1693 no_backend = lang_hooks.post_options (&main_input_filename);
1694 #ifndef USE_MAPPED_LOCATION
1695 input_filename = main_input_filename;
1698 #ifdef OVERRIDE_OPTIONS
1699 /* Some machines may reject certain combinations of options. */
1703 if (flag_section_anchors && !target_supports_section_anchors_p ())
1705 warning (OPT_fsection_anchors,
1706 "this target does not support %qs", "-fsection-anchors");
1707 flag_section_anchors = 0;
1710 if (flag_short_enums == 2)
1711 flag_short_enums = targetm.default_short_enums ();
1713 /* Set aux_base_name if not already set. */
1716 else if (main_input_filename)
1718 char *name = xstrdup (lbasename (main_input_filename));
1720 strip_off_ending (name, strlen (name));
1721 aux_base_name = name;
1724 aux_base_name = "gccaux";
1726 /* Set up the align_*_log variables, defaulting them to 1 if they
1727 were still unset. */
1728 if (align_loops <= 0) align_loops = 1;
1729 if (align_loops_max_skip > align_loops || !align_loops)
1730 align_loops_max_skip = align_loops - 1;
1731 align_loops_log = floor_log2 (align_loops * 2 - 1);
1732 if (align_jumps <= 0) align_jumps = 1;
1733 if (align_jumps_max_skip > align_jumps || !align_jumps)
1734 align_jumps_max_skip = align_jumps - 1;
1735 align_jumps_log = floor_log2 (align_jumps * 2 - 1);
1736 if (align_labels <= 0) align_labels = 1;
1737 align_labels_log = floor_log2 (align_labels * 2 - 1);
1738 if (align_labels_max_skip > align_labels || !align_labels)
1739 align_labels_max_skip = align_labels - 1;
1740 if (align_functions <= 0) align_functions = 1;
1741 align_functions_log = floor_log2 (align_functions * 2 - 1);
1743 /* Unrolling all loops implies that standard loop unrolling must also
1745 if (flag_unroll_all_loops)
1746 flag_unroll_loops = 1;
1748 /* The loop unrolling code assumes that cse will be run after loop.
1749 web and rename-registers also help when run after loop unrolling. */
1751 if (flag_rerun_cse_after_loop == AUTODETECT_VALUE)
1752 flag_rerun_cse_after_loop = flag_unroll_loops || flag_peel_loops;
1753 if (flag_web == AUTODETECT_VALUE)
1754 flag_web = flag_unroll_loops || flag_peel_loops;
1755 if (flag_rename_registers == AUTODETECT_VALUE)
1756 flag_rename_registers = flag_unroll_loops || flag_peel_loops;
1758 if (flag_non_call_exceptions)
1759 flag_asynchronous_unwind_tables = 1;
1760 if (flag_asynchronous_unwind_tables)
1761 flag_unwind_tables = 1;
1763 /* Disable unit-at-a-time mode for frontends not supporting callgraph
1765 if (flag_unit_at_a_time && ! lang_hooks.callgraph.expand_function)
1766 flag_unit_at_a_time = 0;
1768 if (!flag_unit_at_a_time)
1769 flag_section_anchors = 0;
1771 if (flag_value_profile_transformations)
1772 flag_profile_values = 1;
1774 /* Warn about options that are not supported on this machine. */
1775 #ifndef INSN_SCHEDULING
1776 if (flag_schedule_insns || flag_schedule_insns_after_reload)
1777 warning (0, "instruction scheduling not supported on this target machine");
1780 if (flag_delayed_branch)
1781 warning (0, "this target machine does not have delayed branches");
1784 user_label_prefix = USER_LABEL_PREFIX;
1785 if (flag_leading_underscore != -1)
1787 /* If the default prefix is more complicated than "" or "_",
1788 issue a warning and ignore this option. */
1789 if (user_label_prefix[0] == 0 ||
1790 (user_label_prefix[0] == '_' && user_label_prefix[1] == 0))
1792 user_label_prefix = flag_leading_underscore ? "_" : "";
1795 warning (0, "-f%sleading-underscore not supported on this target machine",
1796 flag_leading_underscore ? "" : "no-");
1799 /* If we are in verbose mode, write out the version and maybe all the
1800 option flags in use. */
1803 print_version (stderr, "");
1805 print_switch_values (print_to_stderr);
1808 if (flag_syntax_only)
1810 write_symbols = NO_DEBUG;
1814 /* A lot of code assumes write_symbols == NO_DEBUG if the debugging
1816 if (debug_info_level == DINFO_LEVEL_NONE)
1817 write_symbols = NO_DEBUG;
1819 /* Now we know write_symbols, set up the debug hooks based on it.
1820 By default we do nothing for debug output. */
1821 if (PREFERRED_DEBUGGING_TYPE == NO_DEBUG)
1822 default_debug_hooks = &do_nothing_debug_hooks;
1823 #if defined(DBX_DEBUGGING_INFO)
1824 else if (PREFERRED_DEBUGGING_TYPE == DBX_DEBUG)
1825 default_debug_hooks = &dbx_debug_hooks;
1827 #if defined(XCOFF_DEBUGGING_INFO)
1828 else if (PREFERRED_DEBUGGING_TYPE == XCOFF_DEBUG)
1829 default_debug_hooks = &xcoff_debug_hooks;
1831 #ifdef SDB_DEBUGGING_INFO
1832 else if (PREFERRED_DEBUGGING_TYPE == SDB_DEBUG)
1833 default_debug_hooks = &sdb_debug_hooks;
1835 #ifdef DWARF2_DEBUGGING_INFO
1836 else if (PREFERRED_DEBUGGING_TYPE == DWARF2_DEBUG)
1837 default_debug_hooks = &dwarf2_debug_hooks;
1839 #ifdef VMS_DEBUGGING_INFO
1840 else if (PREFERRED_DEBUGGING_TYPE == VMS_DEBUG
1841 || PREFERRED_DEBUGGING_TYPE == VMS_AND_DWARF2_DEBUG)
1842 default_debug_hooks = &vmsdbg_debug_hooks;
1845 if (write_symbols == NO_DEBUG)
1847 #if defined(DBX_DEBUGGING_INFO)
1848 else if (write_symbols == DBX_DEBUG)
1849 debug_hooks = &dbx_debug_hooks;
1851 #if defined(XCOFF_DEBUGGING_INFO)
1852 else if (write_symbols == XCOFF_DEBUG)
1853 debug_hooks = &xcoff_debug_hooks;
1855 #ifdef SDB_DEBUGGING_INFO
1856 else if (write_symbols == SDB_DEBUG)
1857 debug_hooks = &sdb_debug_hooks;
1859 #ifdef DWARF2_DEBUGGING_INFO
1860 else if (write_symbols == DWARF2_DEBUG)
1861 debug_hooks = &dwarf2_debug_hooks;
1863 #ifdef VMS_DEBUGGING_INFO
1864 else if (write_symbols == VMS_DEBUG || write_symbols == VMS_AND_DWARF2_DEBUG)
1865 debug_hooks = &vmsdbg_debug_hooks;
1868 error ("target system does not support the \"%s\" debug format",
1869 debug_type_names[write_symbols]);
1871 /* Now we know which debug output will be used so we can set
1872 flag_var_tracking, flag_rename_registers if the user has
1873 not specified them. */
1874 if (debug_info_level < DINFO_LEVEL_NORMAL
1875 || debug_hooks->var_location == do_nothing_debug_hooks.var_location)
1877 if (flag_var_tracking == 1
1878 || flag_var_tracking_uninit == 1)
1880 if (debug_info_level < DINFO_LEVEL_NORMAL)
1881 warning (0, "variable tracking requested, but useless unless "
1882 "producing debug info");
1884 warning (0, "variable tracking requested, but not supported "
1885 "by this debug format");
1887 flag_var_tracking = 0;
1888 flag_var_tracking_uninit = 0;
1891 if (flag_rename_registers == AUTODETECT_VALUE)
1892 flag_rename_registers = default_debug_hooks->var_location
1893 != do_nothing_debug_hooks.var_location;
1895 if (flag_var_tracking == AUTODETECT_VALUE)
1896 flag_var_tracking = optimize >= 1;
1898 /* If the user specifically requested variable tracking with tagging
1899 uninitialized variables, we need to turn on variable tracking.
1900 (We already determined above that variable tracking is feasible.) */
1901 if (flag_var_tracking_uninit)
1902 flag_var_tracking = 1;
1904 /* If auxiliary info generation is desired, open the output file.
1905 This goes in the same directory as the source file--unlike
1906 all the other output files. */
1907 if (flag_gen_aux_info)
1909 aux_info_file = fopen (aux_info_file_name, "w");
1910 if (aux_info_file == 0)
1911 fatal_error ("can%'t open %s: %m", aux_info_file_name);
1914 if (! targetm.have_named_sections)
1916 if (flag_function_sections)
1918 warning (0, "-ffunction-sections not supported for this target");
1919 flag_function_sections = 0;
1921 if (flag_data_sections)
1923 warning (0, "-fdata-sections not supported for this target");
1924 flag_data_sections = 0;
1928 if (flag_function_sections && profile_flag)
1930 warning (0, "-ffunction-sections disabled; it makes profiling impossible");
1931 flag_function_sections = 0;
1934 #ifndef HAVE_prefetch
1935 if (flag_prefetch_loop_arrays)
1937 warning (0, "-fprefetch-loop-arrays not supported for this target");
1938 flag_prefetch_loop_arrays = 0;
1941 if (flag_prefetch_loop_arrays && !HAVE_prefetch)
1943 warning (0, "-fprefetch-loop-arrays not supported for this target (try -march switches)");
1944 flag_prefetch_loop_arrays = 0;
1948 /* This combination of options isn't handled for i386 targets and doesn't
1949 make much sense anyway, so don't allow it. */
1950 if (flag_prefetch_loop_arrays && optimize_size)
1952 warning (0, "-fprefetch-loop-arrays is not supported with -Os");
1953 flag_prefetch_loop_arrays = 0;
1956 #ifndef OBJECT_FORMAT_ELF
1957 #ifndef OBJECT_FORMAT_MACHO
1958 if (flag_function_sections && write_symbols != NO_DEBUG)
1959 warning (0, "-ffunction-sections may affect debugging on some targets");
1963 /* The presence of IEEE signaling NaNs, implies all math can trap. */
1964 if (flag_signaling_nans)
1965 flag_trapping_math = 1;
1967 /* With -fcx-limited-range, we do cheap and quick complex arithmetic. */
1968 if (flag_cx_limited_range)
1969 flag_complex_method = 0;
1971 /* Targets must be able to place spill slots at lower addresses. If the
1972 target already uses a soft frame pointer, the transition is trivial. */
1973 if (!FRAME_GROWS_DOWNWARD && flag_stack_protect)
1975 warning (0, "-fstack-protector not supported for this target");
1976 flag_stack_protect = 0;
1978 if (!flag_stack_protect)
1979 warn_stack_protect = 0;
1981 /* ??? Unwind info is not correct around the CFG unless either a frame
1982 pointer is present or A_O_A is set. Fixing this requires rewriting
1983 unwind info generation to be aware of the CFG and propagating states
1985 if (flag_unwind_tables && !ACCUMULATE_OUTGOING_ARGS
1986 && flag_omit_frame_pointer)
1988 warning (0, "unwind tables currently requires a frame pointer "
1990 flag_omit_frame_pointer = 0;
1994 /* Initialize the compiler back end. */
1998 init_emit_once (debug_info_level == DINFO_LEVEL_NORMAL
1999 || debug_info_level == DINFO_LEVEL_VERBOSE
2000 #ifdef VMS_DEBUGGING_INFO
2001 /* Enable line number info for traceback. */
2002 || debug_info_level > DINFO_LEVEL_NONE
2004 || flag_test_coverage);
2008 init_fake_stack_mems ();
2010 init_inline_once ();
2012 init_varasm_once ();
2014 /* The following initialization functions need to generate rtl, so
2015 provide a dummy function context for them. */
2016 init_dummy_function_start ();
2018 if (flag_caller_saves)
2019 init_caller_save ();
2020 expand_dummy_function_end ();
2023 /* Language-dependent initialization. Returns nonzero on success. */
2025 lang_dependent_init (const char *name)
2027 location_t save_loc = input_location;
2028 if (dump_base_name == 0)
2029 dump_base_name = name && name[0] ? name : "gccdump";
2031 /* Other front-end initialization. */
2032 #ifdef USE_MAPPED_LOCATION
2033 input_location = BUILTINS_LOCATION;
2035 input_filename = "<built-in>";
2038 if (lang_hooks.init () == 0)
2040 input_location = save_loc;
2042 init_asm_output (name);
2044 /* These create various _DECL nodes, so need to be called after the
2045 front end is initialized. */
2049 /* The following initialization functions need to generate rtl, so
2050 provide a dummy function context for them. */
2051 init_dummy_function_start ();
2054 /* Although the actions of init_set_costs are language-independent,
2055 it uses optabs, so we cannot call it from backend_init. */
2058 expand_dummy_function_end ();
2060 /* If dbx symbol table desired, initialize writing it and output the
2061 predefined types. */
2062 timevar_push (TV_SYMOUT);
2064 #if defined DWARF2_DEBUGGING_INFO || defined DWARF2_UNWIND_INFO
2065 if (dwarf2out_do_frame ())
2066 dwarf2out_frame_init ();
2069 /* Now we have the correct original filename, we can initialize
2071 (*debug_hooks->init) (name);
2073 timevar_pop (TV_SYMOUT);
2079 dump_memory_report (bool final)
2081 ggc_print_statistics ();
2082 stringpool_statistics ();
2083 dump_tree_statistics ();
2084 dump_rtx_statistics ();
2085 dump_varray_statistics ();
2086 dump_alloc_pool_statistics ();
2087 dump_bitmap_statistics ();
2088 dump_ggc_loc_statistics (final);
2091 /* Clean up: close opened files, etc. */
2096 /* Close the dump files. */
2097 if (flag_gen_aux_info)
2099 fclose (aux_info_file);
2101 unlink (aux_info_file_name);
2104 /* Close non-debugging input and output files. Take special care to note
2105 whether fclose returns an error, since the pages might still be on the
2106 buffer chain while the file is open. */
2110 if (ferror (asm_out_file) != 0)
2111 fatal_error ("error writing to %s: %m", asm_file_name);
2112 if (fclose (asm_out_file) != 0)
2113 fatal_error ("error closing %s: %m", asm_file_name);
2116 finish_optimization_passes ();
2119 dump_memory_report (true);
2121 /* Language-specific end of compilation actions. */
2122 lang_hooks.finish ();
2125 /* Initialize the compiler, and compile the input file. */
2129 /* Initialize timing first. The C front ends read the main file in
2130 the post_options hook, and C++ does file timings. */
2131 if (time_report || !quiet_flag || flag_detailed_statistics)
2133 timevar_start (TV_TOTAL);
2137 /* Don't do any more if an error has already occurred. */
2140 /* This must be run always, because it is needed to compute the FP
2141 predefined macros, such as __LDBL_MAX__, for targets using non
2142 default FP formats. */
2143 init_adjust_machine_modes ();
2145 /* Set up the back-end if requested. */
2149 /* Language-dependent initialization. Returns true on success. */
2150 if (lang_dependent_init (main_input_filename))
2156 /* Stop timing and print the times. */
2157 timevar_stop (TV_TOTAL);
2158 timevar_print (stderr);
2161 /* Entry point of cc1, cc1plus, jc1, f771, etc.
2162 Exit code is FATAL_EXIT_CODE if can't open files or if there were
2163 any errors, or SUCCESS_EXIT_CODE if compilation succeeded.
2165 It is not safe to call this function more than once. */
2168 toplev_main (unsigned int argc, const char **argv)
2172 /* Initialization of GCC's environment, and diagnostics. */
2173 general_init (argv[0]);
2175 /* Parse the options and do minimal processing; basically just
2176 enough to default flags appropriately. */
2177 decode_options (argc, argv);
2181 /* Exit early if we can (e.g. -help). */
2182 if (!exit_after_options)
2185 if (errorcount || sorrycount)
2186 return (FATAL_EXIT_CODE);
2188 return (SUCCESS_EXIT_CODE);