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
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
25 /* This is the top level of cc1/c++.
26 It parses command args, opens files, invokes the various passes
27 in the proper order, and counts the time used by each.
28 Error messages and low-level interface to malloc also handled here. */
31 #undef FLOAT /* This is for hpux. They should change hpux. */
32 #undef FFS /* Some systems define this in param.h. */
34 #include "coretypes.h"
38 #ifdef HAVE_SYS_RESOURCE_H
39 # include <sys/resource.h>
42 #ifdef HAVE_SYS_TIMES_H
43 # include <sys/times.h>
53 #include "insn-attr.h"
54 #include "insn-config.h"
55 #include "insn-flags.h"
56 #include "hard-reg-set.h"
63 #include "basic-block.h"
69 #include "diagnostic.h"
72 #include "dwarf2asm.h"
73 #include "integrate.h"
77 #include "langhooks.h"
78 #include "cfglayout.h"
80 #include "hosthooks.h"
84 #include "value-prof.h"
85 #include "alloc-pool.h"
86 #include "tree-mudflap.h"
88 #if defined (DWARF2_UNWIND_INFO) || defined (DWARF2_DEBUGGING_INFO)
89 #include "dwarf2out.h"
92 #if defined(DBX_DEBUGGING_INFO) || defined(XCOFF_DEBUGGING_INFO)
96 #ifdef SDB_DEBUGGING_INFO
100 #ifdef XCOFF_DEBUGGING_INFO
101 #include "xcoffout.h" /* Needed for external data
102 declarations for e.g. AIX 4.x. */
105 static void general_init (const char *);
106 static void do_compile (void);
107 static void process_options (void);
108 static void backend_init (void);
109 static int lang_dependent_init (const char *);
110 static void init_asm_output (const char *);
111 static void finalize (void);
113 static void crash_signal (int) ATTRIBUTE_NORETURN;
114 static void setup_core_dumping (void);
115 static void compile_file (void);
117 static int print_single_switch (FILE *, int, int, const char *,
118 const char *, const char *,
119 const char *, const char *);
120 static void print_switch_values (FILE *, int, int, const char *,
121 const char *, const char *);
123 /* Nonzero to dump debug info whilst parsing (-dy option). */
124 static int set_yydebug;
126 /* True if we don't need a backend (e.g. preprocessing only). */
127 static bool no_backend;
129 /* Length of line when printing switch values. */
132 /* Name of program invoked, sans directories. */
134 const char *progname;
136 /* Copy of argument vector to toplev_main. */
137 static const char **save_argv;
139 /* Name of top-level original source file (what was input to cpp).
140 This comes from the #-command at the beginning of the actual input.
141 If there isn't any there, then this is the cc1 input file name. */
143 const char *main_input_filename;
145 #ifndef USE_MAPPED_LOCATION
146 location_t unknown_location = { NULL, 0 };
149 /* Used to enable -fvar-tracking, -fweb and -frename-registers according
150 to optimize and default_debug_hooks in process_options (). */
151 #define AUTODETECT_VALUE 2
153 /* Current position in real source file. */
155 location_t input_location;
157 struct line_maps line_table;
159 /* Nonzero if it is unsafe to create any new pseudo registers. */
162 /* Stack of currently pending input files. */
164 struct file_stack *input_file_stack;
166 /* Incremented on each change to input_file_stack. */
167 int input_file_stack_tick;
169 /* Record of input_file_stack at each tick. */
170 typedef struct file_stack *fs_p;
172 DEF_VEC_ALLOC_P(fs_p,heap);
173 static VEC(fs_p,heap) *input_file_stack_history;
175 /* Whether input_file_stack has been restored to a previous state (in
176 which case there should be no more pushing). */
177 static bool input_file_stack_restored;
179 /* Name to use as base of names for dump output files. */
181 const char *dump_base_name;
183 /* Name to use as a base for auxiliary output files. */
185 const char *aux_base_name;
187 /* Bit flags that specify the machine subtype we are compiling for.
188 Bits are tested using macros TARGET_... defined in the tm.h file
189 and set by `-m...' switches. Must be defined in rtlanal.c. */
191 extern int target_flags;
193 /* A mask of target_flags that includes bit X if X was set or cleared
194 on the command line. */
196 int target_flags_explicit;
198 /* Debug hooks - dependent upon command line options. */
200 const struct gcc_debug_hooks *debug_hooks;
202 /* Debug hooks - target default. */
204 static const struct gcc_debug_hooks *default_debug_hooks;
206 /* Other flags saying which kinds of debugging dump have been requested. */
208 int rtl_dump_and_exit;
209 int flag_print_asm_name;
210 enum graph_dump_types graph_dump_format;
212 /* Name for output file of assembly code, specified with -o. */
214 const char *asm_file_name;
216 /* Nonzero means do optimizations. -O.
217 Particular numeric values stand for particular amounts of optimization;
218 thus, -O2 stores 2 here. However, the optimizations beyond the basic
219 ones are not controlled directly by this variable. Instead, they are
220 controlled by individual `flag_...' variables that are defaulted
221 based on this variable. */
225 /* Nonzero means optimize for size. -Os.
226 The only valid values are zero and nonzero. When optimize_size is
227 nonzero, optimize defaults to 2, but certain individual code
228 bloating optimizations are disabled. */
230 int optimize_size = 0;
232 /* The FUNCTION_DECL for the function currently being compiled,
233 or 0 if between functions. */
234 tree current_function_decl;
236 /* Set to the FUNC_BEGIN label of the current function, or NULL
238 const char * current_function_func_begin_label;
240 /* Temporarily suppress certain warnings.
241 This is set while reading code from a system header file. */
243 int in_system_header = 0;
245 /* Nonzero means to collect statistics which might be expensive
246 and to print them when we are done. */
247 int flag_detailed_statistics = 0;
249 /* A random sequence of characters, unless overridden by user. */
250 const char *flag_random_seed;
252 /* A local time stamp derived from the time of compilation. It will be
253 zero if the system cannot provide a time. It will be -1u, if the
254 user has specified a particular random seed. */
259 /* Nonzero means `char' should be signed. */
261 int flag_signed_char;
263 /* Nonzero means give an enum type only as many bytes as it needs. A value
264 of 2 means it has not yet been initialized. */
266 int flag_short_enums;
268 /* Nonzero if structures and unions should be returned in memory.
270 This should only be defined if compatibility with another compiler or
271 with an ABI is needed, because it results in slower code. */
273 #ifndef DEFAULT_PCC_STRUCT_RETURN
274 #define DEFAULT_PCC_STRUCT_RETURN 1
277 /* Nonzero for -fpcc-struct-return: return values the same way PCC does. */
279 int flag_pcc_struct_return = DEFAULT_PCC_STRUCT_RETURN;
281 /* 0 means straightforward implementation of complex divide acceptable.
282 1 means wide ranges of inputs must work for complex divide.
283 2 means C99-like requirements for complex multiply and divide. */
285 int flag_complex_method = 1;
287 /* Nonzero means that we don't want inlining by virtue of -fno-inline,
288 not just because the tree inliner turned us off. */
290 int flag_really_no_inline = 2;
292 /* Nonzero means we should be saving declaration info into a .X file. */
294 int flag_gen_aux_info = 0;
296 /* Specified name of aux-info file. */
298 const char *aux_info_file_name;
300 /* Nonzero if we are compiling code for a shared library, zero for
305 /* Generate code for GNU or NeXT Objective-C runtime environment. */
307 #ifdef NEXT_OBJC_RUNTIME
308 int flag_next_runtime = 1;
310 int flag_next_runtime = 0;
313 /* Set to the default thread-local storage (tls) model to use. */
315 enum tls_model flag_tls_default = TLS_MODEL_GLOBAL_DYNAMIC;
317 /* Nonzero means change certain warnings into errors.
318 Usually these are warnings about failure to conform to some standard. */
320 int flag_pedantic_errors = 0;
322 /* -dA causes debug commentary information to be produced in
323 the generated assembly code (to make it more readable). This option
324 is generally only of use to those who actually need to read the
325 generated assembly code (perhaps while debugging the compiler itself).
326 Currently, this switch is only used by dwarfout.c; however, it is intended
327 to be a catchall for printing debug information in the assembler file. */
329 int flag_debug_asm = 0;
331 /* -dP causes the rtl to be emitted as a comment in assembly. */
333 int flag_dump_rtl_in_asm = 0;
335 /* When non-NULL, indicates that whenever space is allocated on the
336 stack, the resulting stack pointer must not pass this
337 address---that is, for stacks that grow downward, the stack pointer
338 must always be greater than or equal to this address; for stacks
339 that grow upward, the stack pointer must be less than this address.
340 At present, the rtx may be either a REG or a SYMBOL_REF, although
341 the support provided depends on the backend. */
344 /* If one, renumber instruction UIDs to reduce the number of
345 unused UIDs if there are a lot of instructions. If greater than
346 one, unconditionally renumber instruction UIDs. */
347 int flag_renumber_insns = 1;
349 /* Nonzero if we should track variables. When
350 flag_var_tracking == AUTODETECT_VALUE it will be set according
351 to optimize, debug_info_level and debug_hooks in process_options (). */
352 int flag_var_tracking = AUTODETECT_VALUE;
354 /* True if the user has tagged the function with the 'section'
357 bool user_defined_section_attribute = false;
359 /* Values of the -falign-* flags: how much to align labels in code.
360 0 means `use default', 1 means `don't align'.
361 For each variable, there is an _log variant which is the power
362 of two not less than the variable, for .align output. */
365 int align_loops_max_skip;
367 int align_jumps_max_skip;
368 int align_labels_log;
369 int align_labels_max_skip;
370 int align_functions_log;
374 const char *const string;
378 lang_independent_options;
380 /* Nonzero if subexpressions must be evaluated from left-to-right. */
381 int flag_evaluation_order = 0;
383 /* The user symbol prefix after having resolved same. */
384 const char *user_label_prefix;
386 static const param_info lang_independent_params[] = {
387 #define DEFPARAM(ENUM, OPTION, HELP, DEFAULT, MIN, MAX) \
388 { OPTION, DEFAULT, MIN, MAX, HELP },
389 #include "params.def"
391 { NULL, 0, 0, 0, NULL }
394 /* Output files for assembler code (real compiler output)
395 and debugging dumps. */
399 FILE *dump_file = NULL;
400 const char *dump_file_name;
402 /* The current working directory of a translation. It's generally the
403 directory from which compilation was initiated, but a preprocessed
404 file may specify the original directory in which it was
407 static const char *src_pwd;
409 /* Initialize src_pwd with the given string, and return true. If it
410 was already initialized, return false. As a special case, it may
411 be called with a NULL argument to test whether src_pwd has NOT been
415 set_src_pwd (const char *pwd)
419 if (strcmp (src_pwd, pwd) == 0)
425 src_pwd = xstrdup (pwd);
429 /* Return the directory from which the translation unit was initiated,
430 in case set_src_pwd() was not called before to assign it a
446 /* Called when the start of a function definition is parsed,
447 this function prints on stderr the name of the function. */
449 announce_function (tree decl)
453 if (rtl_dump_and_exit)
454 fprintf (stderr, "%s ", IDENTIFIER_POINTER (DECL_NAME (decl)));
456 fprintf (stderr, " %s", lang_hooks.decl_printable_name (decl, 2));
458 pp_needs_newline (global_dc->printer) = true;
459 diagnostic_set_last_function (global_dc);
463 /* Set up a default flag_random_seed and local_tick, unless the user
464 already specified one. */
469 if (!flag_random_seed)
471 unsigned HOST_WIDE_INT value;
472 static char random_seed[HOST_BITS_PER_WIDE_INT / 4 + 3];
474 /* Get some more or less random data. */
475 #ifdef HAVE_GETTIMEOFDAY
479 gettimeofday (&tv, NULL);
480 local_tick = tv.tv_sec * 1000 + tv.tv_usec / 1000;
484 time_t now = time (NULL);
486 if (now != (time_t)-1)
487 local_tick = (unsigned) now;
490 value = local_tick ^ getpid ();
492 sprintf (random_seed, HOST_WIDE_INT_PRINT_HEX, value);
493 flag_random_seed = random_seed;
495 else if (!local_tick)
500 /* Decode the string P as an integral parameter.
501 If the string is indeed an integer return its numeric value else
502 issue an Invalid Option error for the option PNAME and return DEFVAL.
503 If PNAME is zero just return DEFVAL, do not call error. */
506 read_integral_parameter (const char *p, const char *pname, const int defval)
508 const char *endp = p;
521 error ("invalid option argument %qs", pname);
528 /* When compiling with a recent enough GCC, we use the GNU C "extern inline"
529 for floor_log2 and exact_log2; see toplev.h. That construct, however,
530 conflicts with the ISO C++ One Definition Rule. */
532 #if GCC_VERSION < 3004 || !defined (__cplusplus)
534 /* Given X, an unsigned number, return the largest int Y such that 2**Y <= X.
535 If X is 0, return -1. */
538 floor_log2 (unsigned HOST_WIDE_INT x)
546 t = HOST_BITS_PER_WIDE_INT - 1 - (int) CLZ_HWI (x);
548 if (HOST_BITS_PER_WIDE_INT > 64)
549 if (x >= (unsigned HOST_WIDE_INT) 1 << (t + 64))
551 if (HOST_BITS_PER_WIDE_INT > 32)
552 if (x >= ((unsigned HOST_WIDE_INT) 1) << (t + 32))
554 if (x >= ((unsigned HOST_WIDE_INT) 1) << (t + 16))
556 if (x >= ((unsigned HOST_WIDE_INT) 1) << (t + 8))
558 if (x >= ((unsigned HOST_WIDE_INT) 1) << (t + 4))
560 if (x >= ((unsigned HOST_WIDE_INT) 1) << (t + 2))
562 if (x >= ((unsigned HOST_WIDE_INT) 1) << (t + 1))
569 /* Return the logarithm of X, base 2, considering X unsigned,
570 if X is a power of 2. Otherwise, returns -1. */
573 exact_log2 (unsigned HOST_WIDE_INT x)
578 return x ? CTZ_HWI (x) : -1;
580 return floor_log2 (x);
584 #endif /* GCC_VERSION < 3004 || !defined (__cplusplus) */
586 /* Handler for fatal signals, such as SIGSEGV. These are transformed
587 into ICE messages, which is much more user friendly. In case the
588 error printer crashes, reset the signal to prevent infinite recursion. */
591 crash_signal (int signo)
593 signal (signo, SIG_DFL);
595 /* If we crashed while processing an ASM statement, then be a little more
596 graceful. It's most likely the user's fault. */
597 if (this_is_asm_operands)
599 output_operand_lossage ("unrecoverable error");
600 exit (FATAL_EXIT_CODE);
603 internal_error ("%s", strsignal (signo));
606 /* Arrange to dump core on error. (The regular error message is still
607 printed first, except in the case of abort().) */
610 setup_core_dumping (void)
613 signal (SIGABRT, SIG_DFL);
615 #if defined(HAVE_SETRLIMIT)
618 if (getrlimit (RLIMIT_CORE, &rlim) != 0)
619 fatal_error ("getting core file size maximum limit: %m");
620 rlim.rlim_cur = rlim.rlim_max;
621 if (setrlimit (RLIMIT_CORE, &rlim) != 0)
622 fatal_error ("setting core file size limit to maximum: %m");
625 diagnostic_abort_on_error (global_dc);
629 /* Strip off a legitimate source ending from the input string NAME of
630 length LEN. Rather than having to know the names used by all of
631 our front ends, we strip off an ending of a period followed by
632 up to five characters. (Java uses ".class".) */
635 strip_off_ending (char *name, int len)
638 for (i = 2; i < 6 && len > i; i++)
640 if (name[len - i] == '.')
642 name[len - i] = '\0';
648 /* Output a quoted string. */
651 output_quoted_string (FILE *asm_file, const char *string)
653 #ifdef OUTPUT_QUOTED_STRING
654 OUTPUT_QUOTED_STRING (asm_file, string);
658 putc ('\"', asm_file);
659 while ((c = *string++) != 0)
663 if (c == '\"' || c == '\\')
664 putc ('\\', asm_file);
668 fprintf (asm_file, "\\%03o", (unsigned char) c);
670 putc ('\"', asm_file);
674 /* Output a file name in the form wanted by System V. */
677 output_file_directive (FILE *asm_file, const char *input_name)
682 if (input_name == NULL)
683 input_name = "<stdin>";
685 len = strlen (input_name);
686 na = input_name + len;
688 /* NA gets INPUT_NAME sans directory names. */
689 while (na > input_name)
691 if (IS_DIR_SEPARATOR (na[-1]))
696 #ifdef ASM_OUTPUT_SOURCE_FILENAME
697 ASM_OUTPUT_SOURCE_FILENAME (asm_file, na);
699 fprintf (asm_file, "\t.file\t");
700 output_quoted_string (asm_file, na);
701 fputc ('\n', asm_file);
705 /* A subroutine of wrapup_global_declarations. We've come to the end of
706 the compilation unit. All deferred variables should be undeferred,
707 and all incomplete decls should be finalized. */
710 wrapup_global_declaration_1 (tree decl)
712 /* We're not deferring this any longer. Assignment is conditional to
713 avoid needlessly dirtying PCH pages. */
714 if (CODE_CONTAINS_STRUCT (TREE_CODE (decl), TS_DECL_WITH_VIS)
715 && DECL_DEFER_OUTPUT (decl) != 0)
716 DECL_DEFER_OUTPUT (decl) = 0;
718 if (TREE_CODE (decl) == VAR_DECL && DECL_SIZE (decl) == 0)
719 lang_hooks.finish_incomplete_decl (decl);
722 /* A subroutine of wrapup_global_declarations. Decide whether or not DECL
723 needs to be output. Return true if it is output. */
726 wrapup_global_declaration_2 (tree decl)
728 if (TREE_ASM_WRITTEN (decl) || DECL_EXTERNAL (decl))
731 /* Don't write out static consts, unless we still need them.
733 We also keep static consts if not optimizing (for debugging),
734 unless the user specified -fno-keep-static-consts.
735 ??? They might be better written into the debug information.
736 This is possible when using DWARF.
738 A language processor that wants static constants to be always
739 written out (even if it is not used) is responsible for
740 calling rest_of_decl_compilation itself. E.g. the C front-end
741 calls rest_of_decl_compilation from finish_decl.
742 One motivation for this is that is conventional in some
743 environments to write things like:
744 static const char rcsid[] = "... version string ...";
745 intending to force the string to be in the executable.
747 A language processor that would prefer to have unneeded
748 static constants "optimized away" would just defer writing
749 them out until here. E.g. C++ does this, because static
750 constants are often defined in header files.
752 ??? A tempting alternative (for both C and C++) would be
753 to force a constant to be written if and only if it is
754 defined in a main file, as opposed to an include file. */
756 if (TREE_CODE (decl) == VAR_DECL && TREE_STATIC (decl))
758 struct cgraph_varpool_node *node;
760 node = cgraph_varpool_node (decl);
764 else if (node->alias)
766 else if (!cgraph_global_info_ready
768 || TREE_USED (DECL_ASSEMBLER_NAME (decl))))
770 else if (node->needed)
772 else if (DECL_COMDAT (decl))
774 else if (TREE_READONLY (decl) && !TREE_PUBLIC (decl)
775 && (optimize || !flag_keep_static_consts
776 || DECL_ARTIFICIAL (decl)))
781 rest_of_decl_compilation (decl, 1, 1);
789 /* Do any final processing required for the declarations in VEC, of
790 which there are LEN. We write out inline functions and variables
791 that have been deferred until this point, but which are required.
792 Returns nonzero if anything was put out. */
795 wrapup_global_declarations (tree *vec, int len)
797 bool reconsider, output_something = false;
800 for (i = 0; i < len; i++)
801 wrapup_global_declaration_1 (vec[i]);
803 /* Now emit any global variables or functions that we have been
804 putting off. We need to loop in case one of the things emitted
805 here references another one which comes earlier in the list. */
809 for (i = 0; i < len; i++)
810 reconsider |= wrapup_global_declaration_2 (vec[i]);
812 output_something = true;
816 return output_something;
819 /* A subroutine of check_global_declarations. Issue appropriate warnings
820 for the global declaration DECL. */
823 check_global_declaration_1 (tree decl)
825 /* Warn about any function declared static but not defined. We don't
826 warn about variables, because many programs have static variables
827 that exist only to get some text into the object file. */
828 if (TREE_CODE (decl) == FUNCTION_DECL
829 && DECL_INITIAL (decl) == 0
830 && DECL_EXTERNAL (decl)
831 && ! DECL_ARTIFICIAL (decl)
832 && ! TREE_NO_WARNING (decl)
833 && ! TREE_PUBLIC (decl)
834 && (warn_unused_function
835 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl))))
837 if (TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl)))
838 pedwarn ("%q+F used but never defined", decl);
840 warning (0, "%q+F declared %<static%> but never defined", decl);
841 /* This symbol is effectively an "extern" declaration now. */
842 TREE_PUBLIC (decl) = 1;
843 assemble_external (decl);
846 /* Warn about static fns or vars defined but not used. */
847 if (((warn_unused_function && TREE_CODE (decl) == FUNCTION_DECL)
848 /* We don't warn about "static const" variables because the
849 "rcs_id" idiom uses that construction. */
850 || (warn_unused_variable
851 && TREE_CODE (decl) == VAR_DECL && ! TREE_READONLY (decl)))
852 && ! DECL_IN_SYSTEM_HEADER (decl)
853 && ! TREE_USED (decl)
854 /* The TREE_USED bit for file-scope decls is kept in the identifier,
855 to handle multiple external decls in different scopes. */
856 && ! (DECL_NAME (decl) && TREE_USED (DECL_NAME (decl)))
857 && ! DECL_EXTERNAL (decl)
858 && ! TREE_PUBLIC (decl)
859 /* A volatile variable might be used in some non-obvious way. */
860 && ! TREE_THIS_VOLATILE (decl)
861 /* Global register variables must be declared to reserve them. */
862 && ! (TREE_CODE (decl) == VAR_DECL && DECL_REGISTER (decl))
863 /* Otherwise, ask the language. */
864 && lang_hooks.decls.warn_unused_global (decl))
865 warning (0, "%q+D defined but not used", decl);
868 /* Issue appropriate warnings for the global declarations in VEC (of
869 which there are LEN). */
872 check_global_declarations (tree *vec, int len)
876 for (i = 0; i < len; i++)
877 check_global_declaration_1 (vec[i]);
880 /* Emit debugging information for all global declarations in VEC. */
883 emit_debug_global_declarations (tree *vec, int len)
887 /* Avoid confusing the debug information machinery when there are errors. */
888 if (errorcount != 0 || sorrycount != 0)
891 timevar_push (TV_SYMOUT);
892 for (i = 0; i < len; i++)
893 debug_hooks->global_decl (vec[i]);
894 timevar_pop (TV_SYMOUT);
897 /* Warn about a use of an identifier which was marked deprecated. */
899 warn_deprecated_use (tree node)
901 if (node == 0 || !warn_deprecated_decl)
906 expanded_location xloc = expand_location (DECL_SOURCE_LOCATION (node));
907 warning (OPT_Wdeprecated_declarations,
908 "%qs is deprecated (declared at %s:%d)",
909 IDENTIFIER_POINTER (DECL_NAME (node)),
910 xloc.file, xloc.line);
912 else if (TYPE_P (node))
914 const char *what = NULL;
915 tree decl = TYPE_STUB_DECL (node);
917 if (TYPE_NAME (node))
919 if (TREE_CODE (TYPE_NAME (node)) == IDENTIFIER_NODE)
920 what = IDENTIFIER_POINTER (TYPE_NAME (node));
921 else if (TREE_CODE (TYPE_NAME (node)) == TYPE_DECL
922 && DECL_NAME (TYPE_NAME (node)))
923 what = IDENTIFIER_POINTER (DECL_NAME (TYPE_NAME (node)));
928 expanded_location xloc
929 = expand_location (DECL_SOURCE_LOCATION (decl));
931 warning (OPT_Wdeprecated_declarations,
932 "%qs is deprecated (declared at %s:%d)", what,
933 xloc.file, xloc.line);
935 warning (OPT_Wdeprecated_declarations,
936 "type is deprecated (declared at %s:%d)",
937 xloc.file, xloc.line);
942 warning (OPT_Wdeprecated_declarations, "%qs is deprecated", what);
944 warning (OPT_Wdeprecated_declarations, "type is deprecated");
949 /* APPLE LOCAL begin "unavailable" attribute (radar 2809697) --ilr */
950 /* Warn about a use of an identifier which was marked deprecated. */
952 error_unavailable_use (tree node)
958 error ("%qs is unavailable (declared at %s:%d)",
959 IDENTIFIER_POINTER (DECL_NAME (node)),
960 DECL_SOURCE_FILE (node), DECL_SOURCE_LINE (node));
961 else if (TYPE_P (node))
963 const char *what = NULL;
964 tree decl = TYPE_STUB_DECL (node);
966 if (TREE_CODE (TYPE_NAME (node)) == IDENTIFIER_NODE)
967 what = IDENTIFIER_POINTER (TYPE_NAME (node));
968 else if (TREE_CODE (TYPE_NAME (node)) == TYPE_DECL
969 && DECL_NAME (TYPE_NAME (node)))
970 what = IDENTIFIER_POINTER (DECL_NAME (TYPE_NAME (node)));
975 error ("%qs is unavailable (declared at %s:%d)", what,
976 DECL_SOURCE_FILE (decl), DECL_SOURCE_LINE (decl));
978 error ("%qs is unavailable", what);
981 error ("type is unavailable (declared at %s:%d)",
982 DECL_SOURCE_FILE (decl), DECL_SOURCE_LINE (decl));
984 error ("type is unavailable");
987 /* APPLE LOCAL end "unavailable" attribute (radar 2809697) --ilr */
989 /* Save the current INPUT_LOCATION on the top entry in the
990 INPUT_FILE_STACK. Push a new entry for FILE and LINE, and set the
991 INPUT_LOCATION accordingly. */
994 #ifdef USE_MAPPED_LOCATION
995 push_srcloc (location_t fline)
997 push_srcloc (const char *file, int line)
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 = XNEW (struct file_stack);
1007 fs->location = input_location;
1008 fs->next = input_file_stack;
1009 #ifdef USE_MAPPED_LOCATION
1010 input_location = fline;
1012 input_filename = file;
1015 input_file_stack = fs;
1016 input_file_stack_tick++;
1017 VEC_safe_push (fs_p, heap, input_file_stack_history, input_file_stack);
1020 /* Pop the top entry off the stack of presently open source files.
1021 Restore the INPUT_LOCATION from the new topmost entry on the
1027 struct file_stack *fs;
1029 gcc_assert (!input_file_stack_restored);
1030 if (input_file_stack_tick == (int) ((1U << INPUT_FILE_STACK_BITS) - 1))
1031 sorry ("GCC supports only %d input file changes", input_file_stack_tick);
1033 fs = input_file_stack;
1034 input_location = fs->location;
1035 input_file_stack = fs->next;
1036 input_file_stack_tick++;
1037 VEC_safe_push (fs_p, heap, input_file_stack_history, input_file_stack);
1040 /* Restore the input file stack to its state as of TICK, for the sake
1041 of diagnostics after processing the whole input. Once this has
1042 been called, push_srcloc and pop_srcloc may no longer be
1045 restore_input_file_stack (int tick)
1048 input_file_stack = NULL;
1050 input_file_stack = VEC_index (fs_p, input_file_stack_history, tick - 1);
1051 input_file_stack_tick = tick;
1052 input_file_stack_restored = true;
1055 /* Compile an entire translation unit. Write a file of assembly
1056 output and various debugging dumps. */
1061 /* Initialize yet another pass. */
1064 init_final (main_input_filename);
1065 coverage_init (aux_base_name);
1067 timevar_push (TV_PARSE);
1069 /* Call the parser, which parses the entire file (calling
1070 rest_of_compilation for each function). */
1071 lang_hooks.parse_file (set_yydebug);
1073 /* In case there were missing block closers,
1074 get us back to the global binding level. */
1075 lang_hooks.clear_binding_stack ();
1077 /* Compilation is now finished except for writing
1078 what's left of the symbol table output. */
1079 timevar_pop (TV_PARSE);
1081 if (flag_syntax_only || errorcount || sorrycount)
1084 lang_hooks.decls.final_write_globals ();
1085 cgraph_varpool_assemble_pending_decls ();
1086 finish_aliases_2 ();
1088 /* This must occur after the loop to output deferred functions.
1089 Else the coverage initializer would not be emitted if all the
1090 functions in this compilation unit were deferred. */
1093 /* Likewise for mudflap static object registrations. */
1095 mudflap_finish_file ();
1097 output_shared_constant_pool ();
1098 output_object_blocks ();
1100 /* Write out any pending weak symbol declarations. */
1104 /* Do dbx symbols. */
1105 timevar_push (TV_SYMOUT);
1107 #if defined DWARF2_DEBUGGING_INFO || defined DWARF2_UNWIND_INFO
1108 if (dwarf2out_do_frame ())
1109 dwarf2out_frame_finish ();
1112 (*debug_hooks->finish) (main_input_filename);
1113 timevar_pop (TV_SYMOUT);
1115 /* Output some stuff at end of file if nec. */
1117 dw2_output_indirect_constants ();
1119 /* Flush any pending external directives. cgraph did this for
1120 assemble_external calls from the front end, but the RTL
1121 expander can also generate them. */
1122 process_pending_assemble_externals ();
1124 /* Attach a special .ident directive to the end of the file to identify
1125 the version of GCC which compiled this code. The format of the .ident
1126 string is patterned after the ones produced by native SVR4 compilers. */
1129 fprintf (asm_out_file, "%s\"GCC: (GNU) %s\"\n",
1130 IDENT_ASM_OP, version_string);
1133 /* This must be at the end. Some target ports emit end of file directives
1134 into the assembly file here, and hence we can not output anything to the
1135 assembly file after this point. */
1136 targetm.asm_out.file_end ();
1139 /* Parse a -d... command line switch. */
1142 decode_d_option (const char *arg)
1153 flag_print_asm_name = 1;
1156 flag_dump_rtl_in_asm = 1;
1157 flag_print_asm_name = 1;
1160 graph_dump_format = vcg;
1163 rtl_dump_and_exit = 1;
1168 case 'D': /* These are handled by the preprocessor. */
1172 setup_core_dumping();
1177 if (!enable_rtl_dump_file (c))
1178 warning (0, "unrecognized gcc debugging option: %c", c);
1183 /* Indexed by enum debug_info_type. */
1184 const char *const debug_type_names[] =
1186 "none", "stabs", "coff", "dwarf-2", "xcoff", "vms"
1189 /* Print version information to FILE.
1190 Each line begins with INDENT (for the case where FILE is the
1191 assembler output file). */
1194 print_version (FILE *file, const char *indent)
1196 static const char fmt1[] =
1198 N_("%s%s%s version %s (%s)\n%s\tcompiled by GNU C version %s.\n")
1200 N_("%s%s%s version %s (%s) compiled by CC.\n")
1203 static const char fmt2[] =
1204 N_("%s%sGGC heuristics: --param ggc-min-expand=%d --param ggc-min-heapsize=%d\n");
1206 #define __VERSION__ "[?]"
1209 file == stderr ? _(fmt1) : fmt1,
1210 indent, *indent != 0 ? " " : "",
1211 lang_hooks.name, version_string, TARGET_NAME,
1212 indent, __VERSION__);
1214 file == stderr ? _(fmt2) : fmt2,
1215 indent, *indent != 0 ? " " : "",
1216 PARAM_VALUE (GGC_MIN_EXPAND), PARAM_VALUE (GGC_MIN_HEAPSIZE));
1219 /* Print an option value and return the adjusted position in the line.
1220 ??? We don't handle error returns from fprintf (disk full); presumably
1221 other code will catch a disk full though. */
1224 print_single_switch (FILE *file, int pos, int max,
1225 const char *indent, const char *sep, const char *term,
1226 const char *type, const char *name)
1228 /* The ultrix fprintf returns 0 on success, so compute the result we want
1229 here since we need it for the following test. */
1230 int len = strlen (sep) + strlen (type) + strlen (name);
1235 fprintf (file, "%s", term);
1240 fprintf (file, "%s", indent);
1241 pos = strlen (indent);
1243 fprintf (file, "%s%s%s", sep, type, name);
1248 /* Print active target switches to FILE.
1249 POS is the current cursor position and MAX is the size of a "line".
1250 Each line begins with INDENT and ends with TERM.
1251 Each switch is separated from the next by SEP. */
1254 print_switch_values (FILE *file, int pos, int max,
1255 const char *indent, const char *sep, const char *term)
1260 /* Fill in the -frandom-seed option, if the user didn't pass it, so
1261 that it can be printed below. This helps reproducibility. */
1264 /* Print the options as passed. */
1265 pos = print_single_switch (file, pos, max, indent, *indent ? " " : "", term,
1266 _("options passed: "), "");
1268 for (p = &save_argv[1]; *p != NULL; p++)
1272 if (strcmp (*p, "-o") == 0)
1278 if (strcmp (*p, "-quiet") == 0)
1280 if (strcmp (*p, "-version") == 0)
1285 pos = print_single_switch (file, pos, max, indent, sep, term, *p, "");
1288 fprintf (file, "%s", term);
1290 /* Print the -f and -m options that have been enabled.
1291 We don't handle language specific options but printing argv
1294 pos = print_single_switch (file, 0, max, indent, *indent ? " " : "", term,
1295 _("options enabled: "), "");
1297 for (j = 0; j < cl_options_count; j++)
1298 if ((cl_options[j].flags & CL_REPORT)
1299 && option_enabled (j) > 0)
1300 pos = print_single_switch (file, pos, max, indent, sep, term,
1301 "", cl_options[j].opt_text);
1303 fprintf (file, "%s", term);
1306 /* Open assembly code output file. Do this even if -fsyntax-only is
1307 on, because then the driver will have provided the name of a
1308 temporary file or bit bucket for us. NAME is the file specified on
1309 the command line, possibly NULL. */
1311 init_asm_output (const char *name)
1313 if (name == NULL && asm_file_name == 0)
1314 asm_out_file = stdout;
1317 if (asm_file_name == 0)
1319 int len = strlen (dump_base_name);
1320 char *dumpname = XNEWVEC (char, len + 6);
1321 memcpy (dumpname, dump_base_name, len + 1);
1322 strip_off_ending (dumpname, len);
1323 strcat (dumpname, ".s");
1324 asm_file_name = dumpname;
1326 if (!strcmp (asm_file_name, "-"))
1327 asm_out_file = stdout;
1329 asm_out_file = fopen (asm_file_name, "w+b");
1330 if (asm_out_file == 0)
1331 fatal_error ("can%'t open %s for writing: %m", asm_file_name);
1334 if (!flag_syntax_only)
1336 targetm.asm_out.file_start ();
1338 #ifdef ASM_COMMENT_START
1339 if (flag_verbose_asm)
1341 /* Print the list of options in effect. */
1342 print_version (asm_out_file, ASM_COMMENT_START);
1343 print_switch_values (asm_out_file, 0, MAX_LINE,
1344 ASM_COMMENT_START, " ", "\n");
1345 /* Add a blank line here so it appears in assembler output but not
1347 fprintf (asm_out_file, "\n");
1353 /* Return true if the state of option OPTION should be stored in PCH files
1354 and checked by default_pch_valid_p. Store the option's current state
1358 option_affects_pch_p (int option, struct cl_option_state *state)
1360 if ((cl_options[option].flags & CL_TARGET) == 0)
1362 if (cl_options[option].flag_var == &target_flags)
1363 if (targetm.check_pch_target_flags)
1365 return get_option_state (option, state);
1368 /* Default version of get_pch_validity.
1369 By default, every flag difference is fatal; that will be mostly right for
1370 most targets, but completely right for very few. */
1373 default_get_pch_validity (size_t *len)
1375 struct cl_option_state state;
1380 if (targetm.check_pch_target_flags)
1381 *len += sizeof (target_flags);
1382 for (i = 0; i < cl_options_count; i++)
1383 if (option_affects_pch_p (i, &state))
1386 result = r = XNEWVEC (char, *len);
1390 if (targetm.check_pch_target_flags)
1392 memcpy (r, &target_flags, sizeof (target_flags));
1393 r += sizeof (target_flags);
1396 for (i = 0; i < cl_options_count; i++)
1397 if (option_affects_pch_p (i, &state))
1399 memcpy (r, state.data, state.size);
1406 /* Return a message which says that a PCH file was created with a different
1407 setting of OPTION. */
1410 pch_option_mismatch (const char *option)
1414 asprintf (&r, _("created and used with differing settings of '%s'"), option);
1416 return _("out of memory");
1420 /* Default version of pch_valid_p. */
1423 default_pch_valid_p (const void *data_p, size_t len)
1425 struct cl_option_state state;
1426 const char *data = (const char *)data_p;
1429 /* -fpic and -fpie also usually make a PCH invalid. */
1430 if (data[0] != flag_pic)
1431 return _("created and used with different settings of -fpic");
1432 if (data[1] != flag_pie)
1433 return _("created and used with different settings of -fpie");
1436 /* Check target_flags. */
1437 if (targetm.check_pch_target_flags)
1442 memcpy (&tf, data, sizeof (target_flags));
1443 data += sizeof (target_flags);
1444 len -= sizeof (target_flags);
1445 r = targetm.check_pch_target_flags (tf);
1450 for (i = 0; i < cl_options_count; i++)
1451 if (option_affects_pch_p (i, &state))
1453 if (memcmp (data, state.data, state.size) != 0)
1454 return pch_option_mismatch (cl_options[i].opt_text);
1462 /* Default tree printer. Handles declarations only. */
1464 default_tree_printer (pretty_printer * pp, text_info *text, const char *spec,
1465 int precision, bool wide, bool set_locus, bool hash)
1469 /* FUTURE: %+x should set the locus. */
1470 if (precision != 0 || wide || hash)
1476 t = va_arg (*text->args_ptr, tree);
1477 if (DECL_DEBUG_EXPR_IS_FROM (t) && DECL_DEBUG_EXPR (t))
1478 t = DECL_DEBUG_EXPR (t);
1483 t = va_arg (*text->args_ptr, tree);
1490 if (set_locus && text->locus)
1491 *text->locus = DECL_SOURCE_LOCATION (t);
1495 const char *n = DECL_NAME (t)
1496 ? lang_hooks.decl_printable_name (t, 2)
1501 dump_generic_node (pp, t, 0, 0, 0);
1506 /* Initialization of the front end environment, before command line
1507 options are parsed. Signal handlers, internationalization etc.
1508 ARGV0 is main's argv[0]. */
1510 general_init (const char *argv0)
1514 p = argv0 + strlen (argv0);
1515 while (p != argv0 && !IS_DIR_SEPARATOR (p[-1]))
1519 xmalloc_set_program_name (progname);
1523 /* Unlock the stdio streams. */
1524 unlock_std_streams ();
1526 gcc_init_libintl ();
1528 /* Initialize the diagnostics reporting machinery, so option parsing
1529 can give warnings and errors. */
1530 diagnostic_initialize (global_dc);
1531 /* Set a default printer. Language specific initializations will
1532 override it later. */
1533 pp_format_decoder (global_dc->printer) = &default_tree_printer;
1535 /* Trap fatal signals, e.g. SIGSEGV, and convert them to ICE messages. */
1537 signal (SIGSEGV, crash_signal);
1540 signal (SIGILL, crash_signal);
1543 signal (SIGBUS, crash_signal);
1546 signal (SIGABRT, crash_signal);
1548 #if defined SIGIOT && (!defined SIGABRT || SIGABRT != SIGIOT)
1549 signal (SIGIOT, crash_signal);
1552 signal (SIGFPE, crash_signal);
1555 /* Other host-specific signal setup. */
1556 (*host_hooks.extra_signals)();
1558 /* Initialize the garbage-collector, string pools and tree type hash
1562 linemap_init (&line_table);
1565 /* Initialize register usage now so switches may override. */
1568 /* Register the language-independent parameters. */
1569 add_params (lang_independent_params, LAST_PARAM);
1571 /* This must be done after add_params but before argument processing. */
1572 init_ggc_heuristics();
1573 init_optimization_passes ();
1576 /* Return true if the current target supports -fsection-anchors. */
1579 target_supports_section_anchors_p (void)
1581 if (targetm.min_anchor_offset == 0 && targetm.max_anchor_offset == 0)
1584 if (targetm.asm_out.output_anchor == NULL)
1590 /* Process the options that have been parsed. */
1592 process_options (void)
1594 /* Just in case lang_hooks.post_options ends up calling a debug_hook.
1595 This can happen with incorrect pre-processed input. */
1596 debug_hooks = &do_nothing_debug_hooks;
1598 /* Allow the front end to perform consistency checks and do further
1599 initialization based on the command line options. This hook also
1600 sets the original filename if appropriate (e.g. foo.i -> foo.c)
1601 so we can correctly initialize debug output. */
1602 no_backend = lang_hooks.post_options (&main_input_filename);
1603 #ifndef USE_MAPPED_LOCATION
1604 input_filename = main_input_filename;
1607 #ifdef OVERRIDE_OPTIONS
1608 /* Some machines may reject certain combinations of options. */
1612 if (flag_section_anchors && !target_supports_section_anchors_p ())
1614 warning (OPT_fsection_anchors,
1615 "this target does not support %qs", "-fsection-anchors");
1616 flag_section_anchors = 0;
1619 if (flag_short_enums == 2)
1620 flag_short_enums = targetm.default_short_enums ();
1622 /* Set aux_base_name if not already set. */
1625 else if (main_input_filename)
1627 char *name = xstrdup (lbasename (main_input_filename));
1629 strip_off_ending (name, strlen (name));
1630 aux_base_name = name;
1633 aux_base_name = "gccaux";
1635 /* Set up the align_*_log variables, defaulting them to 1 if they
1636 were still unset. */
1637 if (align_loops <= 0) align_loops = 1;
1638 if (align_loops_max_skip > align_loops || !align_loops)
1639 align_loops_max_skip = align_loops - 1;
1640 align_loops_log = floor_log2 (align_loops * 2 - 1);
1641 if (align_jumps <= 0) align_jumps = 1;
1642 if (align_jumps_max_skip > align_jumps || !align_jumps)
1643 align_jumps_max_skip = align_jumps - 1;
1644 align_jumps_log = floor_log2 (align_jumps * 2 - 1);
1645 if (align_labels <= 0) align_labels = 1;
1646 align_labels_log = floor_log2 (align_labels * 2 - 1);
1647 if (align_labels_max_skip > align_labels || !align_labels)
1648 align_labels_max_skip = align_labels - 1;
1649 if (align_functions <= 0) align_functions = 1;
1650 align_functions_log = floor_log2 (align_functions * 2 - 1);
1652 /* Unrolling all loops implies that standard loop unrolling must also
1654 if (flag_unroll_all_loops)
1655 flag_unroll_loops = 1;
1657 /* The loop unrolling code assumes that cse will be run after loop.
1658 web and rename-registers also help when run after loop unrolling. */
1660 if (flag_rerun_cse_after_loop == AUTODETECT_VALUE)
1661 flag_rerun_cse_after_loop = flag_unroll_loops || flag_peel_loops;
1662 if (flag_web == AUTODETECT_VALUE)
1663 flag_web = flag_unroll_loops || flag_peel_loops;
1664 if (flag_rename_registers == AUTODETECT_VALUE)
1665 flag_rename_registers = flag_unroll_loops || flag_peel_loops;
1667 if (flag_non_call_exceptions)
1668 flag_asynchronous_unwind_tables = 1;
1669 if (flag_asynchronous_unwind_tables)
1670 flag_unwind_tables = 1;
1672 /* Disable unit-at-a-time mode for frontends not supporting callgraph
1674 if (flag_unit_at_a_time && ! lang_hooks.callgraph.expand_function)
1675 flag_unit_at_a_time = 0;
1677 if (!flag_unit_at_a_time)
1678 flag_section_anchors = 0;
1680 if (flag_value_profile_transformations)
1681 flag_profile_values = 1;
1683 /* Warn about options that are not supported on this machine. */
1684 #ifndef INSN_SCHEDULING
1685 if (flag_schedule_insns || flag_schedule_insns_after_reload)
1686 warning (0, "instruction scheduling not supported on this target machine");
1689 if (flag_delayed_branch)
1690 warning (0, "this target machine does not have delayed branches");
1693 user_label_prefix = USER_LABEL_PREFIX;
1694 if (flag_leading_underscore != -1)
1696 /* If the default prefix is more complicated than "" or "_",
1697 issue a warning and ignore this option. */
1698 if (user_label_prefix[0] == 0 ||
1699 (user_label_prefix[0] == '_' && user_label_prefix[1] == 0))
1701 user_label_prefix = flag_leading_underscore ? "_" : "";
1704 warning (0, "-f%sleading-underscore not supported on this target machine",
1705 flag_leading_underscore ? "" : "no-");
1708 /* If we are in verbose mode, write out the version and maybe all the
1709 option flags in use. */
1712 print_version (stderr, "");
1714 print_switch_values (stderr, 0, MAX_LINE, "", " ", "\n");
1717 if (flag_syntax_only)
1719 write_symbols = NO_DEBUG;
1723 /* A lot of code assumes write_symbols == NO_DEBUG if the debugging
1725 if (debug_info_level == DINFO_LEVEL_NONE)
1726 write_symbols = NO_DEBUG;
1728 /* Now we know write_symbols, set up the debug hooks based on it.
1729 By default we do nothing for debug output. */
1730 if (PREFERRED_DEBUGGING_TYPE == NO_DEBUG)
1731 default_debug_hooks = &do_nothing_debug_hooks;
1732 #if defined(DBX_DEBUGGING_INFO)
1733 else if (PREFERRED_DEBUGGING_TYPE == DBX_DEBUG)
1734 default_debug_hooks = &dbx_debug_hooks;
1736 #if defined(XCOFF_DEBUGGING_INFO)
1737 else if (PREFERRED_DEBUGGING_TYPE == XCOFF_DEBUG)
1738 default_debug_hooks = &xcoff_debug_hooks;
1740 #ifdef SDB_DEBUGGING_INFO
1741 else if (PREFERRED_DEBUGGING_TYPE == SDB_DEBUG)
1742 default_debug_hooks = &sdb_debug_hooks;
1744 #ifdef DWARF2_DEBUGGING_INFO
1745 else if (PREFERRED_DEBUGGING_TYPE == DWARF2_DEBUG)
1746 default_debug_hooks = &dwarf2_debug_hooks;
1748 #ifdef VMS_DEBUGGING_INFO
1749 else if (PREFERRED_DEBUGGING_TYPE == VMS_DEBUG
1750 || PREFERRED_DEBUGGING_TYPE == VMS_AND_DWARF2_DEBUG)
1751 default_debug_hooks = &vmsdbg_debug_hooks;
1754 if (write_symbols == NO_DEBUG)
1756 #if defined(DBX_DEBUGGING_INFO)
1757 else if (write_symbols == DBX_DEBUG)
1758 debug_hooks = &dbx_debug_hooks;
1760 #if defined(XCOFF_DEBUGGING_INFO)
1761 else if (write_symbols == XCOFF_DEBUG)
1762 debug_hooks = &xcoff_debug_hooks;
1764 #ifdef SDB_DEBUGGING_INFO
1765 else if (write_symbols == SDB_DEBUG)
1766 debug_hooks = &sdb_debug_hooks;
1768 #ifdef DWARF2_DEBUGGING_INFO
1769 else if (write_symbols == DWARF2_DEBUG)
1770 debug_hooks = &dwarf2_debug_hooks;
1772 #ifdef VMS_DEBUGGING_INFO
1773 else if (write_symbols == VMS_DEBUG || write_symbols == VMS_AND_DWARF2_DEBUG)
1774 debug_hooks = &vmsdbg_debug_hooks;
1777 error ("target system does not support the \"%s\" debug format",
1778 debug_type_names[write_symbols]);
1780 /* Now we know which debug output will be used so we can set
1781 flag_var_tracking, flag_rename_registers if the user has
1782 not specified them. */
1783 if (debug_info_level < DINFO_LEVEL_NORMAL
1784 || debug_hooks->var_location == do_nothing_debug_hooks.var_location)
1786 if (flag_var_tracking == 1)
1788 if (debug_info_level < DINFO_LEVEL_NORMAL)
1789 warning (0, "variable tracking requested, but useless unless "
1790 "producing debug info");
1792 warning (0, "variable tracking requested, but not supported "
1793 "by this debug format");
1795 flag_var_tracking = 0;
1798 if (flag_rename_registers == AUTODETECT_VALUE)
1799 flag_rename_registers = default_debug_hooks->var_location
1800 != do_nothing_debug_hooks.var_location;
1802 if (flag_var_tracking == AUTODETECT_VALUE)
1803 flag_var_tracking = optimize >= 1;
1805 /* If auxiliary info generation is desired, open the output file.
1806 This goes in the same directory as the source file--unlike
1807 all the other output files. */
1808 if (flag_gen_aux_info)
1810 aux_info_file = fopen (aux_info_file_name, "w");
1811 if (aux_info_file == 0)
1812 fatal_error ("can%'t open %s: %m", aux_info_file_name);
1815 if (! targetm.have_named_sections)
1817 if (flag_function_sections)
1819 warning (0, "-ffunction-sections not supported for this target");
1820 flag_function_sections = 0;
1822 if (flag_data_sections)
1824 warning (0, "-fdata-sections not supported for this target");
1825 flag_data_sections = 0;
1829 if (flag_function_sections && profile_flag)
1831 warning (0, "-ffunction-sections disabled; it makes profiling impossible");
1832 flag_function_sections = 0;
1835 #ifndef HAVE_prefetch
1836 if (flag_prefetch_loop_arrays)
1838 warning (0, "-fprefetch-loop-arrays not supported for this target");
1839 flag_prefetch_loop_arrays = 0;
1842 if (flag_prefetch_loop_arrays && !HAVE_prefetch)
1844 warning (0, "-fprefetch-loop-arrays not supported for this target (try -march switches)");
1845 flag_prefetch_loop_arrays = 0;
1849 /* This combination of options isn't handled for i386 targets and doesn't
1850 make much sense anyway, so don't allow it. */
1851 if (flag_prefetch_loop_arrays && optimize_size)
1853 warning (0, "-fprefetch-loop-arrays is not supported with -Os");
1854 flag_prefetch_loop_arrays = 0;
1857 #ifndef OBJECT_FORMAT_ELF
1858 #ifndef OBJECT_FORMAT_MACHO
1859 if (flag_function_sections && write_symbols != NO_DEBUG)
1860 warning (0, "-ffunction-sections may affect debugging on some targets");
1864 /* The presence of IEEE signaling NaNs, implies all math can trap. */
1865 if (flag_signaling_nans)
1866 flag_trapping_math = 1;
1868 /* With -fcx-limited-range, we do cheap and quick complex arithmetic. */
1869 if (flag_cx_limited_range)
1870 flag_complex_method = 0;
1872 /* Targets must be able to place spill slots at lower addresses. If the
1873 target already uses a soft frame pointer, the transition is trivial. */
1874 if (!FRAME_GROWS_DOWNWARD && flag_stack_protect)
1876 warning (0, "-fstack-protector not supported for this target");
1877 flag_stack_protect = 0;
1879 if (!flag_stack_protect)
1880 warn_stack_protect = 0;
1882 /* ??? Unwind info is not correct around the CFG unless either a frame
1883 pointer is present or A_O_A is set. Fixing this requires rewriting
1884 unwind info generation to be aware of the CFG and propagating states
1886 if (flag_unwind_tables && !ACCUMULATE_OUTGOING_ARGS
1887 && flag_omit_frame_pointer)
1889 warning (0, "unwind tables currently requires a frame pointer "
1891 flag_omit_frame_pointer = 0;
1895 /* Initialize the compiler back end. */
1899 init_emit_once (debug_info_level == DINFO_LEVEL_NORMAL
1900 || debug_info_level == DINFO_LEVEL_VERBOSE
1901 #ifdef VMS_DEBUGGING_INFO
1902 /* Enable line number info for traceback. */
1903 || debug_info_level > DINFO_LEVEL_NONE
1905 || flag_test_coverage);
1909 init_fake_stack_mems ();
1912 init_varasm_once ();
1914 /* The following initialization functions need to generate rtl, so
1915 provide a dummy function context for them. */
1916 init_dummy_function_start ();
1918 if (flag_caller_saves)
1919 init_caller_save ();
1920 expand_dummy_function_end ();
1923 /* Language-dependent initialization. Returns nonzero on success. */
1925 lang_dependent_init (const char *name)
1927 location_t save_loc = input_location;
1928 if (dump_base_name == 0)
1929 dump_base_name = name && name[0] ? name : "gccdump";
1931 /* Other front-end initialization. */
1932 #ifdef USE_MAPPED_LOCATION
1933 input_location = BUILTINS_LOCATION;
1935 input_filename = "<built-in>";
1938 if (lang_hooks.init () == 0)
1940 input_location = save_loc;
1942 init_asm_output (name);
1944 /* These create various _DECL nodes, so need to be called after the
1945 front end is initialized. */
1949 /* The following initialization functions need to generate rtl, so
1950 provide a dummy function context for them. */
1951 init_dummy_function_start ();
1953 expand_dummy_function_end ();
1955 /* If dbx symbol table desired, initialize writing it and output the
1956 predefined types. */
1957 timevar_push (TV_SYMOUT);
1959 #if defined DWARF2_DEBUGGING_INFO || defined DWARF2_UNWIND_INFO
1960 if (dwarf2out_do_frame ())
1961 dwarf2out_frame_init ();
1964 /* Now we have the correct original filename, we can initialize
1966 (*debug_hooks->init) (name);
1968 timevar_pop (TV_SYMOUT);
1973 /* Clean up: close opened files, etc. */
1978 /* Close the dump files. */
1979 if (flag_gen_aux_info)
1981 fclose (aux_info_file);
1983 unlink (aux_info_file_name);
1986 /* Close non-debugging input and output files. Take special care to note
1987 whether fclose returns an error, since the pages might still be on the
1988 buffer chain while the file is open. */
1992 if (ferror (asm_out_file) != 0)
1993 fatal_error ("error writing to %s: %m", asm_file_name);
1994 if (fclose (asm_out_file) != 0)
1995 fatal_error ("error closing %s: %m", asm_file_name);
1998 finish_optimization_passes ();
2002 ggc_print_statistics ();
2003 stringpool_statistics ();
2004 dump_tree_statistics ();
2005 dump_rtx_statistics ();
2006 dump_varray_statistics ();
2007 dump_alloc_pool_statistics ();
2008 dump_ggc_loc_statistics ();
2011 /* Free up memory for the benefit of leak detectors. */
2014 /* Language-specific end of compilation actions. */
2015 lang_hooks.finish ();
2018 /* Initialize the compiler, and compile the input file. */
2022 /* Initialize timing first. The C front ends read the main file in
2023 the post_options hook, and C++ does file timings. */
2024 if (time_report || !quiet_flag || flag_detailed_statistics)
2026 timevar_start (TV_TOTAL);
2030 /* Don't do any more if an error has already occurred. */
2033 /* This must be run always, because it is needed to compute the FP
2034 predefined macros, such as __LDBL_MAX__, for targets using non
2035 default FP formats. */
2036 init_adjust_machine_modes ();
2038 /* Set up the back-end if requested. */
2042 /* Language-dependent initialization. Returns true on success. */
2043 if (lang_dependent_init (main_input_filename))
2049 /* Stop timing and print the times. */
2050 timevar_stop (TV_TOTAL);
2051 timevar_print (stderr);
2054 /* Entry point of cc1, cc1plus, jc1, f771, etc.
2055 Exit code is FATAL_EXIT_CODE if can't open files or if there were
2056 any errors, or SUCCESS_EXIT_CODE if compilation succeeded.
2058 It is not safe to call this function more than once. */
2061 toplev_main (unsigned int argc, const char **argv)
2065 /* Initialization of GCC's environment, and diagnostics. */
2066 general_init (argv[0]);
2068 /* Parse the options and do minimal processing; basically just
2069 enough to default flags appropriately. */
2070 decode_options (argc, argv);
2074 /* Exit early if we can (e.g. -help). */
2075 if (!exit_after_options)
2078 if (errorcount || sorrycount)
2079 return (FATAL_EXIT_CODE);
2081 return (SUCCESS_EXIT_CODE);