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 /* Nonzero if it is unsafe to create any new pseudo registers. */
155 /* Stack of currently pending input files. */
157 struct file_stack *input_file_stack;
159 /* Incremented on each change to input_file_stack. */
160 int input_file_stack_tick;
162 /* Record of input_file_stack at each tick. */
163 typedef struct file_stack *fs_p;
165 DEF_VEC_ALLOC_P(fs_p,heap);
166 static VEC(fs_p,heap) *input_file_stack_history;
168 /* Whether input_file_stack has been restored to a previous state (in
169 which case there should be no more pushing). */
170 static bool input_file_stack_restored;
172 /* Name to use as base of names for dump output files. */
174 const char *dump_base_name;
176 /* Name to use as a base for auxiliary output files. */
178 const char *aux_base_name;
180 /* Bit flags that specify the machine subtype we are compiling for.
181 Bits are tested using macros TARGET_... defined in the tm.h file
182 and set by `-m...' switches. Must be defined in rtlanal.c. */
184 extern int target_flags;
186 /* A mask of target_flags that includes bit X if X was set or cleared
187 on the command line. */
189 int target_flags_explicit;
191 /* Debug hooks - dependent upon command line options. */
193 const struct gcc_debug_hooks *debug_hooks;
195 /* Debug hooks - target default. */
197 static const struct gcc_debug_hooks *default_debug_hooks;
199 /* Other flags saying which kinds of debugging dump have been requested. */
201 int rtl_dump_and_exit;
202 int flag_print_asm_name;
203 enum graph_dump_types graph_dump_format;
205 /* Name for output file of assembly code, specified with -o. */
207 const char *asm_file_name;
209 /* Nonzero means do optimizations. -O.
210 Particular numeric values stand for particular amounts of optimization;
211 thus, -O2 stores 2 here. However, the optimizations beyond the basic
212 ones are not controlled directly by this variable. Instead, they are
213 controlled by individual `flag_...' variables that are defaulted
214 based on this variable. */
218 /* Nonzero means optimize for size. -Os.
219 The only valid values are zero and nonzero. When optimize_size is
220 nonzero, optimize defaults to 2, but certain individual code
221 bloating optimizations are disabled. */
223 int optimize_size = 0;
225 /* The FUNCTION_DECL for the function currently being compiled,
226 or 0 if between functions. */
227 tree current_function_decl;
229 /* Set to the FUNC_BEGIN label of the current function, or NULL
231 const char * current_function_func_begin_label;
233 /* Temporarily suppress certain warnings.
234 This is set while reading code from a system header file. */
236 int in_system_header = 0;
238 /* Nonzero means to collect statistics which might be expensive
239 and to print them when we are done. */
240 int flag_detailed_statistics = 0;
242 /* A random sequence of characters, unless overridden by user. */
243 static const char *flag_random_seed;
245 /* A local time stamp derived from the time of compilation. It will be
246 zero if the system cannot provide a time. It will be -1u, if the
247 user has specified a particular random seed. */
252 /* Nonzero means `char' should be signed. */
254 int flag_signed_char;
256 /* Nonzero means give an enum type only as many bytes as it needs. A value
257 of 2 means it has not yet been initialized. */
259 int flag_short_enums;
261 /* Nonzero if structures and unions should be returned in memory.
263 This should only be defined if compatibility with another compiler or
264 with an ABI is needed, because it results in slower code. */
266 #ifndef DEFAULT_PCC_STRUCT_RETURN
267 #define DEFAULT_PCC_STRUCT_RETURN 1
270 /* Nonzero for -fpcc-struct-return: return values the same way PCC does. */
272 int flag_pcc_struct_return = DEFAULT_PCC_STRUCT_RETURN;
274 /* 0 means straightforward implementation of complex divide acceptable.
275 1 means wide ranges of inputs must work for complex divide.
276 2 means C99-like requirements for complex multiply and divide. */
278 int flag_complex_method = 1;
280 /* Nonzero means that we don't want inlining by virtue of -fno-inline,
281 not just because the tree inliner turned us off. */
283 int flag_really_no_inline = 2;
285 /* Nonzero means we should be saving declaration info into a .X file. */
287 int flag_gen_aux_info = 0;
289 /* Specified name of aux-info file. */
291 const char *aux_info_file_name;
293 /* Nonzero if we are compiling code for a shared library, zero for
298 /* Generate code for GNU or NeXT Objective-C runtime environment. */
300 #ifdef NEXT_OBJC_RUNTIME
301 int flag_next_runtime = 1;
303 int flag_next_runtime = 0;
306 /* Set to the default thread-local storage (tls) model to use. */
308 enum tls_model flag_tls_default = TLS_MODEL_GLOBAL_DYNAMIC;
310 /* Nonzero means change certain warnings into errors.
311 Usually these are warnings about failure to conform to some standard. */
313 int flag_pedantic_errors = 0;
315 /* -dA causes debug commentary information to be produced in
316 the generated assembly code (to make it more readable). This option
317 is generally only of use to those who actually need to read the
318 generated assembly code (perhaps while debugging the compiler itself).
319 Currently, this switch is only used by dwarfout.c; however, it is intended
320 to be a catchall for printing debug information in the assembler file. */
322 int flag_debug_asm = 0;
324 /* -dP causes the rtl to be emitted as a comment in assembly. */
326 int flag_dump_rtl_in_asm = 0;
328 /* When non-NULL, indicates that whenever space is allocated on the
329 stack, the resulting stack pointer must not pass this
330 address---that is, for stacks that grow downward, the stack pointer
331 must always be greater than or equal to this address; for stacks
332 that grow upward, the stack pointer must be less than this address.
333 At present, the rtx may be either a REG or a SYMBOL_REF, although
334 the support provided depends on the backend. */
337 /* Nonzero if we should track variables. When
338 flag_var_tracking == AUTODETECT_VALUE it will be set according
339 to optimize, debug_info_level and debug_hooks in process_options (). */
340 int flag_var_tracking = AUTODETECT_VALUE;
342 /* True if the user has tagged the function with the 'section'
345 bool user_defined_section_attribute = false;
347 /* Values of the -falign-* flags: how much to align labels in code.
348 0 means `use default', 1 means `don't align'.
349 For each variable, there is an _log variant which is the power
350 of two not less than the variable, for .align output. */
353 int align_loops_max_skip;
355 int align_jumps_max_skip;
356 int align_labels_log;
357 int align_labels_max_skip;
358 int align_functions_log;
362 const char *const string;
366 lang_independent_options;
368 /* Nonzero if subexpressions must be evaluated from left-to-right. */
369 int flag_evaluation_order = 0;
371 /* The user symbol prefix after having resolved same. */
372 const char *user_label_prefix;
374 static const param_info lang_independent_params[] = {
375 #define DEFPARAM(ENUM, OPTION, HELP, DEFAULT, MIN, MAX) \
376 { OPTION, DEFAULT, false, MIN, MAX, HELP },
377 #include "params.def"
379 { NULL, 0, false, 0, 0, NULL }
382 /* Output files for assembler code (real compiler output)
383 and debugging dumps. */
387 FILE *dump_file = NULL;
388 const char *dump_file_name;
390 /* The current working directory of a translation. It's generally the
391 directory from which compilation was initiated, but a preprocessed
392 file may specify the original directory in which it was
395 static const char *src_pwd;
397 /* Initialize src_pwd with the given string, and return true. If it
398 was already initialized, return false. As a special case, it may
399 be called with a NULL argument to test whether src_pwd has NOT been
403 set_src_pwd (const char *pwd)
407 if (strcmp (src_pwd, pwd) == 0)
413 src_pwd = xstrdup (pwd);
417 /* Return the directory from which the translation unit was initiated,
418 in case set_src_pwd() was not called before to assign it a
434 /* Called when the start of a function definition is parsed,
435 this function prints on stderr the name of the function. */
437 announce_function (tree decl)
441 if (rtl_dump_and_exit)
442 fprintf (stderr, "%s ", IDENTIFIER_POINTER (DECL_NAME (decl)));
444 fprintf (stderr, " %s", lang_hooks.decl_printable_name (decl, 2));
446 pp_needs_newline (global_dc->printer) = true;
447 diagnostic_set_last_function (global_dc);
451 /* Initialize local_tick with the time of day, or -1 if
452 flag_random_seed is set. */
455 init_local_tick (void)
457 if (!flag_random_seed)
459 /* Get some more or less random data. */
460 #ifdef HAVE_GETTIMEOFDAY
464 gettimeofday (&tv, NULL);
465 local_tick = tv.tv_sec * 1000 + tv.tv_usec / 1000;
469 time_t now = time (NULL);
471 if (now != (time_t)-1)
472 local_tick = (unsigned) now;
480 /* Set up a default flag_random_seed and local_tick, unless the user
481 already specified one. Must be called after init_local_tick. */
484 init_random_seed (void)
486 unsigned HOST_WIDE_INT value;
487 static char random_seed[HOST_BITS_PER_WIDE_INT / 4 + 3];
489 value = local_tick ^ getpid ();
491 sprintf (random_seed, HOST_WIDE_INT_PRINT_HEX, value);
492 flag_random_seed = random_seed;
495 /* Obtain the random_seed string. Unless NOINIT, initialize it if
496 it's not provided in the command line. */
499 get_random_seed (bool noinit)
501 if (!flag_random_seed && !noinit)
503 return flag_random_seed;
506 /* Modify the random_seed string to VAL. Return its previous
510 set_random_seed (const char *val)
512 const char *old = flag_random_seed;
513 flag_random_seed = val;
517 /* Decode the string P as an integral parameter.
518 If the string is indeed an integer return its numeric value else
519 issue an Invalid Option error for the option PNAME and return DEFVAL.
520 If PNAME is zero just return DEFVAL, do not call error. */
523 read_integral_parameter (const char *p, const char *pname, const int defval)
525 const char *endp = p;
538 error ("invalid option argument %qs", pname);
545 /* When compiling with a recent enough GCC, we use the GNU C "extern inline"
546 for floor_log2 and exact_log2; see toplev.h. That construct, however,
547 conflicts with the ISO C++ One Definition Rule. */
549 #if GCC_VERSION < 3004 || !defined (__cplusplus)
551 /* Given X, an unsigned number, return the largest int Y such that 2**Y <= X.
552 If X is 0, return -1. */
555 floor_log2 (unsigned HOST_WIDE_INT x)
563 t = HOST_BITS_PER_WIDE_INT - 1 - (int) CLZ_HWI (x);
565 if (HOST_BITS_PER_WIDE_INT > 64)
566 if (x >= (unsigned HOST_WIDE_INT) 1 << (t + 64))
568 if (HOST_BITS_PER_WIDE_INT > 32)
569 if (x >= ((unsigned HOST_WIDE_INT) 1) << (t + 32))
571 if (x >= ((unsigned HOST_WIDE_INT) 1) << (t + 16))
573 if (x >= ((unsigned HOST_WIDE_INT) 1) << (t + 8))
575 if (x >= ((unsigned HOST_WIDE_INT) 1) << (t + 4))
577 if (x >= ((unsigned HOST_WIDE_INT) 1) << (t + 2))
579 if (x >= ((unsigned HOST_WIDE_INT) 1) << (t + 1))
586 /* Return the logarithm of X, base 2, considering X unsigned,
587 if X is a power of 2. Otherwise, returns -1. */
590 exact_log2 (unsigned HOST_WIDE_INT x)
595 return x ? CTZ_HWI (x) : -1;
597 return floor_log2 (x);
601 #endif /* GCC_VERSION < 3004 || !defined (__cplusplus) */
603 /* Handler for fatal signals, such as SIGSEGV. These are transformed
604 into ICE messages, which is much more user friendly. In case the
605 error printer crashes, reset the signal to prevent infinite recursion. */
608 crash_signal (int signo)
610 signal (signo, SIG_DFL);
612 /* If we crashed while processing an ASM statement, then be a little more
613 graceful. It's most likely the user's fault. */
614 if (this_is_asm_operands)
616 output_operand_lossage ("unrecoverable error");
617 exit (FATAL_EXIT_CODE);
620 internal_error ("%s", strsignal (signo));
623 /* Arrange to dump core on error. (The regular error message is still
624 printed first, except in the case of abort().) */
627 setup_core_dumping (void)
630 signal (SIGABRT, SIG_DFL);
632 #if defined(HAVE_SETRLIMIT)
635 if (getrlimit (RLIMIT_CORE, &rlim) != 0)
636 fatal_error ("getting core file size maximum limit: %m");
637 rlim.rlim_cur = rlim.rlim_max;
638 if (setrlimit (RLIMIT_CORE, &rlim) != 0)
639 fatal_error ("setting core file size limit to maximum: %m");
642 diagnostic_abort_on_error (global_dc);
646 /* Strip off a legitimate source ending from the input string NAME of
647 length LEN. Rather than having to know the names used by all of
648 our front ends, we strip off an ending of a period followed by
649 up to five characters. (Java uses ".class".) */
652 strip_off_ending (char *name, int len)
655 for (i = 2; i < 6 && len > i; i++)
657 if (name[len - i] == '.')
659 name[len - i] = '\0';
665 /* Output a quoted string. */
668 output_quoted_string (FILE *asm_file, const char *string)
670 #ifdef OUTPUT_QUOTED_STRING
671 OUTPUT_QUOTED_STRING (asm_file, string);
675 putc ('\"', asm_file);
676 while ((c = *string++) != 0)
680 if (c == '\"' || c == '\\')
681 putc ('\\', asm_file);
685 fprintf (asm_file, "\\%03o", (unsigned char) c);
687 putc ('\"', asm_file);
691 /* Output a file name in the form wanted by System V. */
694 output_file_directive (FILE *asm_file, const char *input_name)
699 if (input_name == NULL)
700 input_name = "<stdin>";
702 len = strlen (input_name);
703 na = input_name + len;
705 /* NA gets INPUT_NAME sans directory names. */
706 while (na > input_name)
708 if (IS_DIR_SEPARATOR (na[-1]))
713 #ifdef ASM_OUTPUT_SOURCE_FILENAME
714 ASM_OUTPUT_SOURCE_FILENAME (asm_file, na);
716 fprintf (asm_file, "\t.file\t");
717 output_quoted_string (asm_file, na);
718 fputc ('\n', asm_file);
722 /* A subroutine of wrapup_global_declarations. We've come to the end of
723 the compilation unit. All deferred variables should be undeferred,
724 and all incomplete decls should be finalized. */
727 wrapup_global_declaration_1 (tree decl)
729 /* We're not deferring this any longer. Assignment is conditional to
730 avoid needlessly dirtying PCH pages. */
731 if (CODE_CONTAINS_STRUCT (TREE_CODE (decl), TS_DECL_WITH_VIS)
732 && DECL_DEFER_OUTPUT (decl) != 0)
733 DECL_DEFER_OUTPUT (decl) = 0;
735 if (TREE_CODE (decl) == VAR_DECL && DECL_SIZE (decl) == 0)
736 lang_hooks.finish_incomplete_decl (decl);
739 /* A subroutine of wrapup_global_declarations. Decide whether or not DECL
740 needs to be output. Return true if it is output. */
743 wrapup_global_declaration_2 (tree decl)
745 if (TREE_ASM_WRITTEN (decl) || DECL_EXTERNAL (decl))
748 /* Don't write out static consts, unless we still need them.
750 We also keep static consts if not optimizing (for debugging),
751 unless the user specified -fno-keep-static-consts.
752 ??? They might be better written into the debug information.
753 This is possible when using DWARF.
755 A language processor that wants static constants to be always
756 written out (even if it is not used) is responsible for
757 calling rest_of_decl_compilation itself. E.g. the C front-end
758 calls rest_of_decl_compilation from finish_decl.
759 One motivation for this is that is conventional in some
760 environments to write things like:
761 static const char rcsid[] = "... version string ...";
762 intending to force the string to be in the executable.
764 A language processor that would prefer to have unneeded
765 static constants "optimized away" would just defer writing
766 them out until here. E.g. C++ does this, because static
767 constants are often defined in header files.
769 ??? A tempting alternative (for both C and C++) would be
770 to force a constant to be written if and only if it is
771 defined in a main file, as opposed to an include file. */
773 if (TREE_CODE (decl) == VAR_DECL && TREE_STATIC (decl))
775 struct varpool_node *node;
777 node = varpool_node (decl);
781 else if (node->alias)
783 else if (!cgraph_global_info_ready
785 || TREE_USED (DECL_ASSEMBLER_NAME (decl))))
787 else if (node->needed)
789 else if (DECL_COMDAT (decl))
791 else if (TREE_READONLY (decl) && !TREE_PUBLIC (decl)
792 && (optimize || !flag_keep_static_consts
793 || DECL_ARTIFICIAL (decl)))
798 rest_of_decl_compilation (decl, 1, 1);
806 /* Do any final processing required for the declarations in VEC, of
807 which there are LEN. We write out inline functions and variables
808 that have been deferred until this point, but which are required.
809 Returns nonzero if anything was put out. */
812 wrapup_global_declarations (tree *vec, int len)
814 bool reconsider, output_something = false;
817 for (i = 0; i < len; i++)
818 wrapup_global_declaration_1 (vec[i]);
820 /* Now emit any global variables or functions that we have been
821 putting off. We need to loop in case one of the things emitted
822 here references another one which comes earlier in the list. */
826 for (i = 0; i < len; i++)
827 reconsider |= wrapup_global_declaration_2 (vec[i]);
829 output_something = true;
833 return output_something;
836 /* A subroutine of check_global_declarations. Issue appropriate warnings
837 for the global declaration DECL. */
840 check_global_declaration_1 (tree decl)
842 /* Warn about any function declared static but not defined. We don't
843 warn about variables, because many programs have static variables
844 that exist only to get some text into the object file. */
845 if (TREE_CODE (decl) == FUNCTION_DECL
846 && DECL_INITIAL (decl) == 0
847 && DECL_EXTERNAL (decl)
848 && ! DECL_ARTIFICIAL (decl)
849 && ! TREE_NO_WARNING (decl)
850 && ! TREE_PUBLIC (decl)
851 && (warn_unused_function
852 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl))))
854 if (TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl)))
855 pedwarn ("%q+F used but never defined", decl);
857 warning (0, "%q+F declared %<static%> but never defined", decl);
858 /* This symbol is effectively an "extern" declaration now. */
859 TREE_PUBLIC (decl) = 1;
860 assemble_external (decl);
863 /* Warn about static fns or vars defined but not used. */
864 if (((warn_unused_function && TREE_CODE (decl) == FUNCTION_DECL)
865 /* We don't warn about "static const" variables because the
866 "rcs_id" idiom uses that construction. */
867 || (warn_unused_variable
868 && TREE_CODE (decl) == VAR_DECL && ! TREE_READONLY (decl)))
869 && ! DECL_IN_SYSTEM_HEADER (decl)
870 && ! TREE_USED (decl)
871 /* The TREE_USED bit for file-scope decls is kept in the identifier,
872 to handle multiple external decls in different scopes. */
873 && ! (DECL_NAME (decl) && TREE_USED (DECL_NAME (decl)))
874 && ! DECL_EXTERNAL (decl)
875 && ! TREE_PUBLIC (decl)
876 /* A volatile variable might be used in some non-obvious way. */
877 && ! TREE_THIS_VOLATILE (decl)
878 /* Global register variables must be declared to reserve them. */
879 && ! (TREE_CODE (decl) == VAR_DECL && DECL_REGISTER (decl))
880 /* Otherwise, ask the language. */
881 && lang_hooks.decls.warn_unused_global (decl))
882 warning (0, "%q+D defined but not used", decl);
885 /* Issue appropriate warnings for the global declarations in VEC (of
886 which there are LEN). */
889 check_global_declarations (tree *vec, int len)
893 for (i = 0; i < len; i++)
894 check_global_declaration_1 (vec[i]);
897 /* Emit debugging information for all global declarations in VEC. */
900 emit_debug_global_declarations (tree *vec, int len)
904 /* Avoid confusing the debug information machinery when there are errors. */
905 if (errorcount != 0 || sorrycount != 0)
908 timevar_push (TV_SYMOUT);
909 for (i = 0; i < len; i++)
910 debug_hooks->global_decl (vec[i]);
911 timevar_pop (TV_SYMOUT);
914 /* Warn about a use of an identifier which was marked deprecated. */
916 warn_deprecated_use (tree node)
918 if (node == 0 || !warn_deprecated_decl)
923 expanded_location xloc = expand_location (DECL_SOURCE_LOCATION (node));
924 warning (OPT_Wdeprecated_declarations,
925 "%qD is deprecated (declared at %s:%d)",
926 node, xloc.file, xloc.line);
928 else if (TYPE_P (node))
930 const char *what = NULL;
931 tree decl = TYPE_STUB_DECL (node);
933 if (TYPE_NAME (node))
935 if (TREE_CODE (TYPE_NAME (node)) == IDENTIFIER_NODE)
936 what = IDENTIFIER_POINTER (TYPE_NAME (node));
937 else if (TREE_CODE (TYPE_NAME (node)) == TYPE_DECL
938 && DECL_NAME (TYPE_NAME (node)))
939 what = IDENTIFIER_POINTER (DECL_NAME (TYPE_NAME (node)));
944 expanded_location xloc
945 = expand_location (DECL_SOURCE_LOCATION (decl));
947 warning (OPT_Wdeprecated_declarations,
948 "%qs is deprecated (declared at %s:%d)", what,
949 xloc.file, xloc.line);
951 warning (OPT_Wdeprecated_declarations,
952 "type is deprecated (declared at %s:%d)",
953 xloc.file, xloc.line);
958 warning (OPT_Wdeprecated_declarations, "%qs is deprecated", what);
960 warning (OPT_Wdeprecated_declarations, "type is deprecated");
965 /* Save the current INPUT_LOCATION on the top entry in the
966 INPUT_FILE_STACK. Push a new entry for FILE and LINE, and set the
967 INPUT_LOCATION accordingly. */
970 #ifdef USE_MAPPED_LOCATION
971 push_srcloc (location_t fline)
973 push_srcloc (const char *file, int line)
976 struct file_stack *fs;
978 gcc_assert (!input_file_stack_restored);
979 if (input_file_stack_tick == (int) ((1U << INPUT_FILE_STACK_BITS) - 1))
980 sorry ("GCC supports only %d input file changes", input_file_stack_tick);
982 fs = XNEW (struct file_stack);
983 fs->location = input_location;
984 fs->next = input_file_stack;
985 #ifdef USE_MAPPED_LOCATION
986 input_location = fline;
988 input_filename = file;
991 input_file_stack = fs;
992 input_file_stack_tick++;
993 VEC_safe_push (fs_p, heap, input_file_stack_history, input_file_stack);
996 /* Pop the top entry off the stack of presently open source files.
997 Restore the INPUT_LOCATION from the new topmost entry on the
1003 struct file_stack *fs;
1005 gcc_assert (!input_file_stack_restored);
1006 if (input_file_stack_tick == (int) ((1U << INPUT_FILE_STACK_BITS) - 1))
1007 sorry ("GCC supports only %d input file changes", input_file_stack_tick);
1009 fs = input_file_stack;
1010 input_location = fs->location;
1011 input_file_stack = fs->next;
1012 input_file_stack_tick++;
1013 VEC_safe_push (fs_p, heap, input_file_stack_history, input_file_stack);
1016 /* Restore the input file stack to its state as of TICK, for the sake
1017 of diagnostics after processing the whole input. Once this has
1018 been called, push_srcloc and pop_srcloc may no longer be
1021 restore_input_file_stack (int tick)
1024 input_file_stack = NULL;
1026 input_file_stack = VEC_index (fs_p, input_file_stack_history, tick - 1);
1027 input_file_stack_tick = tick;
1028 input_file_stack_restored = true;
1031 /* Compile an entire translation unit. Write a file of assembly
1032 output and various debugging dumps. */
1037 /* Initialize yet another pass. */
1040 init_final (main_input_filename);
1041 coverage_init (aux_base_name);
1043 timevar_push (TV_PARSE);
1045 /* Call the parser, which parses the entire file (calling
1046 rest_of_compilation for each function). */
1047 lang_hooks.parse_file (set_yydebug);
1049 /* In case there were missing block closers,
1050 get us back to the global binding level. */
1051 lang_hooks.clear_binding_stack ();
1053 /* Compilation is now finished except for writing
1054 what's left of the symbol table output. */
1055 timevar_pop (TV_PARSE);
1057 if (flag_syntax_only)
1060 lang_hooks.decls.final_write_globals ();
1062 if (errorcount || sorrycount)
1065 varpool_assemble_pending_decls ();
1066 finish_aliases_2 ();
1068 /* This must occur after the loop to output deferred functions.
1069 Else the coverage initializer would not be emitted if all the
1070 functions in this compilation unit were deferred. */
1073 /* Likewise for mudflap static object registrations. */
1075 mudflap_finish_file ();
1077 /* Likewise for emulated thread-local storage. */
1078 if (!targetm.have_tls)
1081 output_shared_constant_pool ();
1082 output_object_blocks ();
1084 /* Write out any pending weak symbol declarations. */
1087 /* Do dbx symbols. */
1088 timevar_push (TV_SYMOUT);
1090 #if defined DWARF2_DEBUGGING_INFO || defined DWARF2_UNWIND_INFO
1091 if (dwarf2out_do_frame ())
1092 dwarf2out_frame_finish ();
1095 (*debug_hooks->finish) (main_input_filename);
1096 timevar_pop (TV_SYMOUT);
1098 /* Output some stuff at end of file if nec. */
1100 dw2_output_indirect_constants ();
1102 /* Flush any pending external directives. */
1103 process_pending_assemble_externals ();
1105 /* Attach a special .ident directive to the end of the file to identify
1106 the version of GCC which compiled this code. The format of the .ident
1107 string is patterned after the ones produced by native SVR4 compilers. */
1110 fprintf (asm_out_file, "%s\"GCC: (GNU) %s\"\n",
1111 IDENT_ASM_OP, version_string);
1114 /* This must be at the end. Some target ports emit end of file directives
1115 into the assembly file here, and hence we can not output anything to the
1116 assembly file after this point. */
1117 targetm.asm_out.file_end ();
1120 /* Parse a -d... command line switch. */
1123 decode_d_option (const char *arg)
1134 flag_print_asm_name = 1;
1137 flag_dump_rtl_in_asm = 1;
1138 flag_print_asm_name = 1;
1141 graph_dump_format = vcg;
1144 rtl_dump_and_exit = 1;
1149 case 'D': /* These are handled by the preprocessor. */
1153 setup_core_dumping();
1158 if (!enable_rtl_dump_file (c))
1159 warning (0, "unrecognized gcc debugging option: %c", c);
1164 /* Indexed by enum debug_info_type. */
1165 const char *const debug_type_names[] =
1167 "none", "stabs", "coff", "dwarf-2", "xcoff", "vms"
1170 /* Print version information to FILE.
1171 Each line begins with INDENT (for the case where FILE is the
1172 assembler output file). */
1175 print_version (FILE *file, const char *indent)
1177 static const char fmt1[] =
1179 N_("%s%s%s version %s (%s)\n%s\tcompiled by GNU C version %s, ")
1181 N_("%s%s%s version %s (%s) compiled by CC, ")
1184 static const char fmt2[] =
1185 N_("GMP version %s, MPFR version %s.\n");
1186 static const char fmt3[] =
1187 N_("warning: %s header version %s differs from library version %s.\n");
1188 static const char fmt4[] =
1189 N_("%s%sGGC heuristics: --param ggc-min-expand=%d --param ggc-min-heapsize=%d\n");
1191 #define __VERSION__ "[?]"
1194 file == stderr ? _(fmt1) : fmt1,
1195 indent, *indent != 0 ? " " : "",
1196 lang_hooks.name, version_string, TARGET_NAME,
1197 indent, __VERSION__);
1199 /* We need to stringify the GMP macro values. Ugh, gmp_version has
1200 two string formats, "i.j.k" and "i.j" when k is zero. */
1201 #define GCC_GMP_STRINGIFY_VERSION3(X) #X
1202 #define GCC_GMP_STRINGIFY_VERSION2(X) GCC_GMP_STRINGIFY_VERSION3(X)
1203 #if __GNU_MP_VERSION_PATCHLEVEL == 0
1204 #define GCC_GMP_STRINGIFY_VERSION GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION) "." \
1205 GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION_MINOR)
1207 #define GCC_GMP_STRINGIFY_VERSION GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION) "." \
1208 GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION_MINOR) "." \
1209 GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION_PATCHLEVEL)
1212 file == stderr ? _(fmt2) : fmt2,
1213 GCC_GMP_STRINGIFY_VERSION, MPFR_VERSION_STRING);
1214 if (strcmp (GCC_GMP_STRINGIFY_VERSION, gmp_version))
1216 file == stderr ? _(fmt3) : fmt3,
1217 "GMP", GCC_GMP_STRINGIFY_VERSION, gmp_version);
1218 if (strcmp (MPFR_VERSION_STRING, mpfr_get_version ()))
1220 file == stderr ? _(fmt3) : fmt3,
1221 "MPFR", MPFR_VERSION_STRING, mpfr_get_version ());
1223 file == stderr ? _(fmt4) : fmt4,
1224 indent, *indent != 0 ? " " : "",
1225 PARAM_VALUE (GGC_MIN_EXPAND), PARAM_VALUE (GGC_MIN_HEAPSIZE));
1228 #ifdef ASM_COMMENT_START
1230 print_to_asm_out_file (print_switch_type type, const char * text)
1232 bool prepend_sep = true;
1236 case SWITCH_TYPE_LINE_END:
1237 putc ('\n', asm_out_file);
1240 case SWITCH_TYPE_LINE_START:
1241 fputs (ASM_COMMENT_START, asm_out_file);
1242 return strlen (ASM_COMMENT_START);
1244 case SWITCH_TYPE_DESCRIPTIVE:
1245 if (ASM_COMMENT_START[0] == 0)
1246 prepend_sep = false;
1248 case SWITCH_TYPE_PASSED:
1249 case SWITCH_TYPE_ENABLED:
1251 fputc (' ', asm_out_file);
1252 fprintf (asm_out_file, text);
1253 /* No need to return the length here as
1254 print_single_switch has already done it. */
1264 print_to_stderr (print_switch_type type, const char * text)
1268 case SWITCH_TYPE_LINE_END:
1269 putc ('\n', stderr);
1272 case SWITCH_TYPE_LINE_START:
1275 case SWITCH_TYPE_PASSED:
1276 case SWITCH_TYPE_ENABLED:
1277 fputc (' ', stderr);
1280 case SWITCH_TYPE_DESCRIPTIVE:
1281 fprintf (stderr, text);
1282 /* No need to return the length here as
1283 print_single_switch has already done it. */
1291 /* Print an option value and return the adjusted position in the line.
1292 ??? print_fn doesn't handle errors, eg disk full; presumably other
1293 code will catch a disk full though. */
1296 print_single_switch (print_switch_fn_type print_fn,
1298 print_switch_type type,
1301 /* The ultrix fprintf returns 0 on success, so compute the result
1302 we want here since we need it for the following test. The +1
1303 is for the separator character that will probably be emitted. */
1304 int len = strlen (text) + 1;
1307 && pos + len > MAX_LINE)
1309 print_fn (SWITCH_TYPE_LINE_END, NULL);
1314 pos += print_fn (SWITCH_TYPE_LINE_START, NULL);
1316 print_fn (type, text);
1320 /* Print active target switches using PRINT_FN.
1321 POS is the current cursor position and MAX is the size of a "line".
1322 Each line begins with INDENT and ends with TERM.
1323 Each switch is separated from the next by SEP. */
1326 print_switch_values (print_switch_fn_type print_fn)
1332 /* Fill in the -frandom-seed option, if the user didn't pass it, so
1333 that it can be printed below. This helps reproducibility. */
1334 if (!flag_random_seed)
1335 init_random_seed ();
1337 /* Print the options as passed. */
1338 pos = print_single_switch (print_fn, pos,
1339 SWITCH_TYPE_DESCRIPTIVE, _("options passed: "));
1341 for (p = &save_argv[1]; *p != NULL; p++)
1346 if (strcmp (*p, "-o") == 0
1347 || strcmp (*p, "-dumpbase") == 0
1348 || strcmp (*p, "-auxbase") == 0)
1355 if (strcmp (*p, "-quiet") == 0
1356 || strcmp (*p, "-version") == 0)
1363 pos = print_single_switch (print_fn, pos, SWITCH_TYPE_PASSED, *p);
1367 print_fn (SWITCH_TYPE_LINE_END, NULL);
1369 /* Print the -f and -m options that have been enabled.
1370 We don't handle language specific options but printing argv
1372 pos = print_single_switch (print_fn, 0,
1373 SWITCH_TYPE_DESCRIPTIVE, _("options enabled: "));
1375 for (j = 0; j < cl_options_count; j++)
1376 if ((cl_options[j].flags & CL_REPORT)
1377 && option_enabled (j) > 0)
1378 pos = print_single_switch (print_fn, pos,
1379 SWITCH_TYPE_ENABLED, cl_options[j].opt_text);
1381 print_fn (SWITCH_TYPE_LINE_END, NULL);
1384 /* Open assembly code output file. Do this even if -fsyntax-only is
1385 on, because then the driver will have provided the name of a
1386 temporary file or bit bucket for us. NAME is the file specified on
1387 the command line, possibly NULL. */
1389 init_asm_output (const char *name)
1391 if (name == NULL && asm_file_name == 0)
1392 asm_out_file = stdout;
1395 if (asm_file_name == 0)
1397 int len = strlen (dump_base_name);
1398 char *dumpname = XNEWVEC (char, len + 6);
1400 memcpy (dumpname, dump_base_name, len + 1);
1401 strip_off_ending (dumpname, len);
1402 strcat (dumpname, ".s");
1403 asm_file_name = dumpname;
1405 if (!strcmp (asm_file_name, "-"))
1406 asm_out_file = stdout;
1408 asm_out_file = fopen (asm_file_name, "w+b");
1409 if (asm_out_file == 0)
1410 fatal_error ("can%'t open %s for writing: %m", asm_file_name);
1413 if (!flag_syntax_only)
1415 targetm.asm_out.file_start ();
1417 if (flag_record_gcc_switches)
1419 if (targetm.asm_out.record_gcc_switches)
1421 /* Let the target know that we are about to start recording. */
1422 targetm.asm_out.record_gcc_switches (SWITCH_TYPE_DESCRIPTIVE,
1424 /* Now record the switches. */
1425 print_switch_values (targetm.asm_out.record_gcc_switches);
1426 /* Let the target know that the recording is over. */
1427 targetm.asm_out.record_gcc_switches (SWITCH_TYPE_DESCRIPTIVE,
1431 inform ("-frecord-gcc-switches is not supported by the current target");
1434 #ifdef ASM_COMMENT_START
1435 if (flag_verbose_asm)
1437 /* Print the list of switches in effect
1438 into the assembler file as comments. */
1439 print_version (asm_out_file, ASM_COMMENT_START);
1440 print_switch_values (print_to_asm_out_file);
1441 fprintf (asm_out_file, "\n");
1447 /* Return true if the state of option OPTION should be stored in PCH files
1448 and checked by default_pch_valid_p. Store the option's current state
1452 option_affects_pch_p (int option, struct cl_option_state *state)
1454 if ((cl_options[option].flags & CL_TARGET) == 0)
1456 if (cl_options[option].flag_var == &target_flags)
1457 if (targetm.check_pch_target_flags)
1459 return get_option_state (option, state);
1462 /* Default version of get_pch_validity.
1463 By default, every flag difference is fatal; that will be mostly right for
1464 most targets, but completely right for very few. */
1467 default_get_pch_validity (size_t *len)
1469 struct cl_option_state state;
1474 if (targetm.check_pch_target_flags)
1475 *len += sizeof (target_flags);
1476 for (i = 0; i < cl_options_count; i++)
1477 if (option_affects_pch_p (i, &state))
1480 result = r = XNEWVEC (char, *len);
1484 if (targetm.check_pch_target_flags)
1486 memcpy (r, &target_flags, sizeof (target_flags));
1487 r += sizeof (target_flags);
1490 for (i = 0; i < cl_options_count; i++)
1491 if (option_affects_pch_p (i, &state))
1493 memcpy (r, state.data, state.size);
1500 /* Return a message which says that a PCH file was created with a different
1501 setting of OPTION. */
1504 pch_option_mismatch (const char *option)
1508 asprintf (&r, _("created and used with differing settings of '%s'"), option);
1510 return _("out of memory");
1514 /* Default version of pch_valid_p. */
1517 default_pch_valid_p (const void *data_p, size_t len)
1519 struct cl_option_state state;
1520 const char *data = (const char *)data_p;
1523 /* -fpic and -fpie also usually make a PCH invalid. */
1524 if (data[0] != flag_pic)
1525 return _("created and used with different settings of -fpic");
1526 if (data[1] != flag_pie)
1527 return _("created and used with different settings of -fpie");
1530 /* Check target_flags. */
1531 if (targetm.check_pch_target_flags)
1536 memcpy (&tf, data, sizeof (target_flags));
1537 data += sizeof (target_flags);
1538 len -= sizeof (target_flags);
1539 r = targetm.check_pch_target_flags (tf);
1544 for (i = 0; i < cl_options_count; i++)
1545 if (option_affects_pch_p (i, &state))
1547 if (memcmp (data, state.data, state.size) != 0)
1548 return pch_option_mismatch (cl_options[i].opt_text);
1556 /* Default tree printer. Handles declarations only. */
1558 default_tree_printer (pretty_printer * pp, text_info *text, const char *spec,
1559 int precision, bool wide, bool set_locus, bool hash)
1563 /* FUTURE: %+x should set the locus. */
1564 if (precision != 0 || wide || hash)
1570 t = va_arg (*text->args_ptr, tree);
1571 if (DECL_DEBUG_EXPR_IS_FROM (t) && DECL_DEBUG_EXPR (t))
1572 t = DECL_DEBUG_EXPR (t);
1577 t = va_arg (*text->args_ptr, tree);
1584 if (set_locus && text->locus)
1585 *text->locus = DECL_SOURCE_LOCATION (t);
1589 const char *n = DECL_NAME (t)
1590 ? lang_hooks.decl_printable_name (t, 2)
1595 dump_generic_node (pp, t, 0, TDF_DIAGNOSTIC, 0);
1600 /* Initialization of the front end environment, before command line
1601 options are parsed. Signal handlers, internationalization etc.
1602 ARGV0 is main's argv[0]. */
1604 general_init (const char *argv0)
1608 p = argv0 + strlen (argv0);
1609 while (p != argv0 && !IS_DIR_SEPARATOR (p[-1]))
1613 xmalloc_set_program_name (progname);
1617 /* Unlock the stdio streams. */
1618 unlock_std_streams ();
1620 gcc_init_libintl ();
1622 /* Initialize the diagnostics reporting machinery, so option parsing
1623 can give warnings and errors. */
1624 diagnostic_initialize (global_dc);
1625 /* Set a default printer. Language specific initializations will
1626 override it later. */
1627 pp_format_decoder (global_dc->printer) = &default_tree_printer;
1629 /* Trap fatal signals, e.g. SIGSEGV, and convert them to ICE messages. */
1631 signal (SIGSEGV, crash_signal);
1634 signal (SIGILL, crash_signal);
1637 signal (SIGBUS, crash_signal);
1640 signal (SIGABRT, crash_signal);
1642 #if defined SIGIOT && (!defined SIGABRT || SIGABRT != SIGIOT)
1643 signal (SIGIOT, crash_signal);
1646 signal (SIGFPE, crash_signal);
1649 /* Other host-specific signal setup. */
1650 (*host_hooks.extra_signals)();
1652 /* Initialize the garbage-collector, string pools and tree type hash
1656 linemap_init (&line_table);
1659 /* Initialize register usage now so switches may override. */
1662 /* Register the language-independent parameters. */
1663 add_params (lang_independent_params, LAST_PARAM);
1665 /* This must be done after add_params but before argument processing. */
1666 init_ggc_heuristics();
1667 init_optimization_passes ();
1670 /* Return true if the current target supports -fsection-anchors. */
1673 target_supports_section_anchors_p (void)
1675 if (targetm.min_anchor_offset == 0 && targetm.max_anchor_offset == 0)
1678 if (targetm.asm_out.output_anchor == NULL)
1684 /* Process the options that have been parsed. */
1686 process_options (void)
1688 /* Just in case lang_hooks.post_options ends up calling a debug_hook.
1689 This can happen with incorrect pre-processed input. */
1690 debug_hooks = &do_nothing_debug_hooks;
1692 /* Allow the front end to perform consistency checks and do further
1693 initialization based on the command line options. This hook also
1694 sets the original filename if appropriate (e.g. foo.i -> foo.c)
1695 so we can correctly initialize debug output. */
1696 no_backend = lang_hooks.post_options (&main_input_filename);
1697 #ifndef USE_MAPPED_LOCATION
1698 input_filename = main_input_filename;
1701 #ifdef OVERRIDE_OPTIONS
1702 /* Some machines may reject certain combinations of options. */
1706 if (flag_section_anchors && !target_supports_section_anchors_p ())
1708 warning (OPT_fsection_anchors,
1709 "this target does not support %qs", "-fsection-anchors");
1710 flag_section_anchors = 0;
1713 if (flag_short_enums == 2)
1714 flag_short_enums = targetm.default_short_enums ();
1716 /* Set aux_base_name if not already set. */
1719 else if (main_input_filename)
1721 char *name = xstrdup (lbasename (main_input_filename));
1723 strip_off_ending (name, strlen (name));
1724 aux_base_name = name;
1727 aux_base_name = "gccaux";
1729 /* Set up the align_*_log variables, defaulting them to 1 if they
1730 were still unset. */
1731 if (align_loops <= 0) align_loops = 1;
1732 if (align_loops_max_skip > align_loops || !align_loops)
1733 align_loops_max_skip = align_loops - 1;
1734 align_loops_log = floor_log2 (align_loops * 2 - 1);
1735 if (align_jumps <= 0) align_jumps = 1;
1736 if (align_jumps_max_skip > align_jumps || !align_jumps)
1737 align_jumps_max_skip = align_jumps - 1;
1738 align_jumps_log = floor_log2 (align_jumps * 2 - 1);
1739 if (align_labels <= 0) align_labels = 1;
1740 align_labels_log = floor_log2 (align_labels * 2 - 1);
1741 if (align_labels_max_skip > align_labels || !align_labels)
1742 align_labels_max_skip = align_labels - 1;
1743 if (align_functions <= 0) align_functions = 1;
1744 align_functions_log = floor_log2 (align_functions * 2 - 1);
1746 /* Unrolling all loops implies that standard loop unrolling must also
1748 if (flag_unroll_all_loops)
1749 flag_unroll_loops = 1;
1751 /* The loop unrolling code assumes that cse will be run after loop.
1752 web and rename-registers also help when run after loop unrolling. */
1754 if (flag_rerun_cse_after_loop == AUTODETECT_VALUE)
1755 flag_rerun_cse_after_loop = flag_unroll_loops || flag_peel_loops;
1756 if (flag_web == AUTODETECT_VALUE)
1757 flag_web = flag_unroll_loops || flag_peel_loops;
1758 if (flag_rename_registers == AUTODETECT_VALUE)
1759 flag_rename_registers = flag_unroll_loops || flag_peel_loops;
1761 if (flag_non_call_exceptions)
1762 flag_asynchronous_unwind_tables = 1;
1763 if (flag_asynchronous_unwind_tables)
1764 flag_unwind_tables = 1;
1766 /* Disable unit-at-a-time mode for frontends not supporting callgraph
1768 if (flag_unit_at_a_time && ! lang_hooks.callgraph.expand_function)
1769 flag_unit_at_a_time = 0;
1771 if (!flag_unit_at_a_time)
1772 flag_section_anchors = 0;
1774 if (flag_value_profile_transformations)
1775 flag_profile_values = 1;
1777 /* Warn about options that are not supported on this machine. */
1778 #ifndef INSN_SCHEDULING
1779 if (flag_schedule_insns || flag_schedule_insns_after_reload)
1780 warning (0, "instruction scheduling not supported on this target machine");
1783 if (flag_delayed_branch)
1784 warning (0, "this target machine does not have delayed branches");
1787 user_label_prefix = USER_LABEL_PREFIX;
1788 if (flag_leading_underscore != -1)
1790 /* If the default prefix is more complicated than "" or "_",
1791 issue a warning and ignore this option. */
1792 if (user_label_prefix[0] == 0 ||
1793 (user_label_prefix[0] == '_' && user_label_prefix[1] == 0))
1795 user_label_prefix = flag_leading_underscore ? "_" : "";
1798 warning (0, "-f%sleading-underscore not supported on this target machine",
1799 flag_leading_underscore ? "" : "no-");
1802 /* If we are in verbose mode, write out the version and maybe all the
1803 option flags in use. */
1806 print_version (stderr, "");
1808 print_switch_values (print_to_stderr);
1811 if (flag_syntax_only)
1813 write_symbols = NO_DEBUG;
1817 /* A lot of code assumes write_symbols == NO_DEBUG if the debugging
1819 if (debug_info_level == DINFO_LEVEL_NONE)
1820 write_symbols = NO_DEBUG;
1822 /* Now we know write_symbols, set up the debug hooks based on it.
1823 By default we do nothing for debug output. */
1824 if (PREFERRED_DEBUGGING_TYPE == NO_DEBUG)
1825 default_debug_hooks = &do_nothing_debug_hooks;
1826 #if defined(DBX_DEBUGGING_INFO)
1827 else if (PREFERRED_DEBUGGING_TYPE == DBX_DEBUG)
1828 default_debug_hooks = &dbx_debug_hooks;
1830 #if defined(XCOFF_DEBUGGING_INFO)
1831 else if (PREFERRED_DEBUGGING_TYPE == XCOFF_DEBUG)
1832 default_debug_hooks = &xcoff_debug_hooks;
1834 #ifdef SDB_DEBUGGING_INFO
1835 else if (PREFERRED_DEBUGGING_TYPE == SDB_DEBUG)
1836 default_debug_hooks = &sdb_debug_hooks;
1838 #ifdef DWARF2_DEBUGGING_INFO
1839 else if (PREFERRED_DEBUGGING_TYPE == DWARF2_DEBUG)
1840 default_debug_hooks = &dwarf2_debug_hooks;
1842 #ifdef VMS_DEBUGGING_INFO
1843 else if (PREFERRED_DEBUGGING_TYPE == VMS_DEBUG
1844 || PREFERRED_DEBUGGING_TYPE == VMS_AND_DWARF2_DEBUG)
1845 default_debug_hooks = &vmsdbg_debug_hooks;
1848 if (write_symbols == NO_DEBUG)
1850 #if defined(DBX_DEBUGGING_INFO)
1851 else if (write_symbols == DBX_DEBUG)
1852 debug_hooks = &dbx_debug_hooks;
1854 #if defined(XCOFF_DEBUGGING_INFO)
1855 else if (write_symbols == XCOFF_DEBUG)
1856 debug_hooks = &xcoff_debug_hooks;
1858 #ifdef SDB_DEBUGGING_INFO
1859 else if (write_symbols == SDB_DEBUG)
1860 debug_hooks = &sdb_debug_hooks;
1862 #ifdef DWARF2_DEBUGGING_INFO
1863 else if (write_symbols == DWARF2_DEBUG)
1864 debug_hooks = &dwarf2_debug_hooks;
1866 #ifdef VMS_DEBUGGING_INFO
1867 else if (write_symbols == VMS_DEBUG || write_symbols == VMS_AND_DWARF2_DEBUG)
1868 debug_hooks = &vmsdbg_debug_hooks;
1871 error ("target system does not support the \"%s\" debug format",
1872 debug_type_names[write_symbols]);
1874 /* Now we know which debug output will be used so we can set
1875 flag_var_tracking, flag_rename_registers if the user has
1876 not specified them. */
1877 if (debug_info_level < DINFO_LEVEL_NORMAL
1878 || debug_hooks->var_location == do_nothing_debug_hooks.var_location)
1880 if (flag_var_tracking == 1)
1882 if (debug_info_level < DINFO_LEVEL_NORMAL)
1883 warning (0, "variable tracking requested, but useless unless "
1884 "producing debug info");
1886 warning (0, "variable tracking requested, but not supported "
1887 "by this debug format");
1889 flag_var_tracking = 0;
1892 if (flag_rename_registers == AUTODETECT_VALUE)
1893 flag_rename_registers = default_debug_hooks->var_location
1894 != do_nothing_debug_hooks.var_location;
1896 if (flag_var_tracking == AUTODETECT_VALUE)
1897 flag_var_tracking = optimize >= 1;
1899 /* If auxiliary info generation is desired, open the output file.
1900 This goes in the same directory as the source file--unlike
1901 all the other output files. */
1902 if (flag_gen_aux_info)
1904 aux_info_file = fopen (aux_info_file_name, "w");
1905 if (aux_info_file == 0)
1906 fatal_error ("can%'t open %s: %m", aux_info_file_name);
1909 if (! targetm.have_named_sections)
1911 if (flag_function_sections)
1913 warning (0, "-ffunction-sections not supported for this target");
1914 flag_function_sections = 0;
1916 if (flag_data_sections)
1918 warning (0, "-fdata-sections not supported for this target");
1919 flag_data_sections = 0;
1923 if (flag_function_sections && profile_flag)
1925 warning (0, "-ffunction-sections disabled; it makes profiling impossible");
1926 flag_function_sections = 0;
1929 #ifndef HAVE_prefetch
1930 if (flag_prefetch_loop_arrays)
1932 warning (0, "-fprefetch-loop-arrays not supported for this target");
1933 flag_prefetch_loop_arrays = 0;
1936 if (flag_prefetch_loop_arrays && !HAVE_prefetch)
1938 warning (0, "-fprefetch-loop-arrays not supported for this target (try -march switches)");
1939 flag_prefetch_loop_arrays = 0;
1943 /* This combination of options isn't handled for i386 targets and doesn't
1944 make much sense anyway, so don't allow it. */
1945 if (flag_prefetch_loop_arrays && optimize_size)
1947 warning (0, "-fprefetch-loop-arrays is not supported with -Os");
1948 flag_prefetch_loop_arrays = 0;
1951 #ifndef OBJECT_FORMAT_ELF
1952 #ifndef OBJECT_FORMAT_MACHO
1953 if (flag_function_sections && write_symbols != NO_DEBUG)
1954 warning (0, "-ffunction-sections may affect debugging on some targets");
1958 /* The presence of IEEE signaling NaNs, implies all math can trap. */
1959 if (flag_signaling_nans)
1960 flag_trapping_math = 1;
1962 /* With -fcx-limited-range, we do cheap and quick complex arithmetic. */
1963 if (flag_cx_limited_range)
1964 flag_complex_method = 0;
1966 /* Targets must be able to place spill slots at lower addresses. If the
1967 target already uses a soft frame pointer, the transition is trivial. */
1968 if (!FRAME_GROWS_DOWNWARD && flag_stack_protect)
1970 warning (0, "-fstack-protector not supported for this target");
1971 flag_stack_protect = 0;
1973 if (!flag_stack_protect)
1974 warn_stack_protect = 0;
1976 /* ??? Unwind info is not correct around the CFG unless either a frame
1977 pointer is present or A_O_A is set. Fixing this requires rewriting
1978 unwind info generation to be aware of the CFG and propagating states
1980 if (flag_unwind_tables && !ACCUMULATE_OUTGOING_ARGS
1981 && flag_omit_frame_pointer)
1983 warning (0, "unwind tables currently requires a frame pointer "
1985 flag_omit_frame_pointer = 0;
1989 /* Initialize the compiler back end. */
1993 init_emit_once (debug_info_level == DINFO_LEVEL_NORMAL
1994 || debug_info_level == DINFO_LEVEL_VERBOSE
1995 #ifdef VMS_DEBUGGING_INFO
1996 /* Enable line number info for traceback. */
1997 || debug_info_level > DINFO_LEVEL_NONE
1999 || flag_test_coverage);
2003 init_fake_stack_mems ();
2005 init_inline_once ();
2007 init_varasm_once ();
2009 /* The following initialization functions need to generate rtl, so
2010 provide a dummy function context for them. */
2011 init_dummy_function_start ();
2013 if (flag_caller_saves)
2014 init_caller_save ();
2015 expand_dummy_function_end ();
2018 /* Language-dependent initialization. Returns nonzero on success. */
2020 lang_dependent_init (const char *name)
2022 location_t save_loc = input_location;
2023 if (dump_base_name == 0)
2024 dump_base_name = name && name[0] ? name : "gccdump";
2026 /* Other front-end initialization. */
2027 #ifdef USE_MAPPED_LOCATION
2028 input_location = BUILTINS_LOCATION;
2030 input_filename = "<built-in>";
2033 if (lang_hooks.init () == 0)
2035 input_location = save_loc;
2037 init_asm_output (name);
2039 /* These create various _DECL nodes, so need to be called after the
2040 front end is initialized. */
2044 /* The following initialization functions need to generate rtl, so
2045 provide a dummy function context for them. */
2046 init_dummy_function_start ();
2049 /* Although the actions of init_set_costs are language-independent,
2050 it uses optabs, so we cannot call it from backend_init. */
2053 expand_dummy_function_end ();
2055 /* If dbx symbol table desired, initialize writing it and output the
2056 predefined types. */
2057 timevar_push (TV_SYMOUT);
2059 #if defined DWARF2_DEBUGGING_INFO || defined DWARF2_UNWIND_INFO
2060 if (dwarf2out_do_frame ())
2061 dwarf2out_frame_init ();
2064 /* Now we have the correct original filename, we can initialize
2066 (*debug_hooks->init) (name);
2068 timevar_pop (TV_SYMOUT);
2074 dump_memory_report (bool final)
2076 ggc_print_statistics ();
2077 stringpool_statistics ();
2078 dump_tree_statistics ();
2079 dump_rtx_statistics ();
2080 dump_varray_statistics ();
2081 dump_alloc_pool_statistics ();
2082 dump_bitmap_statistics ();
2083 dump_ggc_loc_statistics (final);
2086 /* Clean up: close opened files, etc. */
2091 /* Close the dump files. */
2092 if (flag_gen_aux_info)
2094 fclose (aux_info_file);
2096 unlink (aux_info_file_name);
2099 /* Close non-debugging input and output files. Take special care to note
2100 whether fclose returns an error, since the pages might still be on the
2101 buffer chain while the file is open. */
2105 if (ferror (asm_out_file) != 0)
2106 fatal_error ("error writing to %s: %m", asm_file_name);
2107 if (fclose (asm_out_file) != 0)
2108 fatal_error ("error closing %s: %m", asm_file_name);
2111 finish_optimization_passes ();
2114 dump_memory_report (true);
2116 /* Language-specific end of compilation actions. */
2117 lang_hooks.finish ();
2120 /* Initialize the compiler, and compile the input file. */
2124 /* Initialize timing first. The C front ends read the main file in
2125 the post_options hook, and C++ does file timings. */
2126 if (time_report || !quiet_flag || flag_detailed_statistics)
2128 timevar_start (TV_TOTAL);
2132 /* Don't do any more if an error has already occurred. */
2135 /* This must be run always, because it is needed to compute the FP
2136 predefined macros, such as __LDBL_MAX__, for targets using non
2137 default FP formats. */
2138 init_adjust_machine_modes ();
2140 /* Set up the back-end if requested. */
2144 /* Language-dependent initialization. Returns true on success. */
2145 if (lang_dependent_init (main_input_filename))
2151 /* Stop timing and print the times. */
2152 timevar_stop (TV_TOTAL);
2153 timevar_print (stderr);
2156 /* Entry point of cc1, cc1plus, jc1, f771, etc.
2157 Exit code is FATAL_EXIT_CODE if can't open files or if there were
2158 any errors, or SUCCESS_EXIT_CODE if compilation succeeded.
2160 It is not safe to call this function more than once. */
2163 toplev_main (unsigned int argc, const char **argv)
2167 /* Initialization of GCC's environment, and diagnostics. */
2168 general_init (argv[0]);
2170 /* Parse the options and do minimal processing; basically just
2171 enough to default flags appropriately. */
2172 decode_options (argc, argv);
2176 /* Exit early if we can (e.g. -help). */
2177 if (!exit_after_options)
2180 if (errorcount || sorrycount)
2181 return (FATAL_EXIT_CODE);
2183 return (SUCCESS_EXIT_CODE);