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;
360 /* Like align_functions_log above, but used by front-ends to force the
361 minimum function alignment. Zero means no alignment is forced. */
362 int force_align_functions_log;
366 const char *const string;
370 lang_independent_options;
372 /* Nonzero if subexpressions must be evaluated from left-to-right. */
373 int flag_evaluation_order = 0;
375 /* The user symbol prefix after having resolved same. */
376 const char *user_label_prefix;
378 static const param_info lang_independent_params[] = {
379 #define DEFPARAM(ENUM, OPTION, HELP, DEFAULT, MIN, MAX) \
380 { OPTION, DEFAULT, false, MIN, MAX, HELP },
381 #include "params.def"
383 { NULL, 0, false, 0, 0, NULL }
386 /* Output files for assembler code (real compiler output)
387 and debugging dumps. */
391 FILE *dump_file = NULL;
392 const char *dump_file_name;
394 /* The current working directory of a translation. It's generally the
395 directory from which compilation was initiated, but a preprocessed
396 file may specify the original directory in which it was
399 static const char *src_pwd;
401 /* Initialize src_pwd with the given string, and return true. If it
402 was already initialized, return false. As a special case, it may
403 be called with a NULL argument to test whether src_pwd has NOT been
407 set_src_pwd (const char *pwd)
411 if (strcmp (src_pwd, pwd) == 0)
417 src_pwd = xstrdup (pwd);
421 /* Return the directory from which the translation unit was initiated,
422 in case set_src_pwd() was not called before to assign it a
438 /* Called when the start of a function definition is parsed,
439 this function prints on stderr the name of the function. */
441 announce_function (tree decl)
445 if (rtl_dump_and_exit)
446 fprintf (stderr, "%s ", IDENTIFIER_POINTER (DECL_NAME (decl)));
448 fprintf (stderr, " %s", lang_hooks.decl_printable_name (decl, 2));
450 pp_needs_newline (global_dc->printer) = true;
451 diagnostic_set_last_function (global_dc);
455 /* Initialize local_tick with the time of day, or -1 if
456 flag_random_seed is set. */
459 init_local_tick (void)
461 if (!flag_random_seed)
463 /* Get some more or less random data. */
464 #ifdef HAVE_GETTIMEOFDAY
468 gettimeofday (&tv, NULL);
469 local_tick = tv.tv_sec * 1000 + tv.tv_usec / 1000;
473 time_t now = time (NULL);
475 if (now != (time_t)-1)
476 local_tick = (unsigned) now;
484 /* Set up a default flag_random_seed and local_tick, unless the user
485 already specified one. Must be called after init_local_tick. */
488 init_random_seed (void)
490 unsigned HOST_WIDE_INT value;
491 static char random_seed[HOST_BITS_PER_WIDE_INT / 4 + 3];
493 value = local_tick ^ getpid ();
495 sprintf (random_seed, HOST_WIDE_INT_PRINT_HEX, value);
496 flag_random_seed = random_seed;
499 /* Obtain the random_seed string. Unless NOINIT, initialize it if
500 it's not provided in the command line. */
503 get_random_seed (bool noinit)
505 if (!flag_random_seed && !noinit)
507 return flag_random_seed;
510 /* Modify the random_seed string to VAL. Return its previous
514 set_random_seed (const char *val)
516 const char *old = flag_random_seed;
517 flag_random_seed = val;
521 /* Decode the string P as an integral parameter.
522 If the string is indeed an integer return its numeric value else
523 issue an Invalid Option error for the option PNAME and return DEFVAL.
524 If PNAME is zero just return DEFVAL, do not call error. */
527 read_integral_parameter (const char *p, const char *pname, const int defval)
529 const char *endp = p;
542 error ("invalid option argument %qs", pname);
549 /* When compiling with a recent enough GCC, we use the GNU C "extern inline"
550 for floor_log2 and exact_log2; see toplev.h. That construct, however,
551 conflicts with the ISO C++ One Definition Rule. */
553 #if GCC_VERSION < 3004 || !defined (__cplusplus)
555 /* Given X, an unsigned number, return the largest int Y such that 2**Y <= X.
556 If X is 0, return -1. */
559 floor_log2 (unsigned HOST_WIDE_INT x)
567 t = HOST_BITS_PER_WIDE_INT - 1 - (int) CLZ_HWI (x);
569 if (HOST_BITS_PER_WIDE_INT > 64)
570 if (x >= (unsigned HOST_WIDE_INT) 1 << (t + 64))
572 if (HOST_BITS_PER_WIDE_INT > 32)
573 if (x >= ((unsigned HOST_WIDE_INT) 1) << (t + 32))
575 if (x >= ((unsigned HOST_WIDE_INT) 1) << (t + 16))
577 if (x >= ((unsigned HOST_WIDE_INT) 1) << (t + 8))
579 if (x >= ((unsigned HOST_WIDE_INT) 1) << (t + 4))
581 if (x >= ((unsigned HOST_WIDE_INT) 1) << (t + 2))
583 if (x >= ((unsigned HOST_WIDE_INT) 1) << (t + 1))
590 /* Return the logarithm of X, base 2, considering X unsigned,
591 if X is a power of 2. Otherwise, returns -1. */
594 exact_log2 (unsigned HOST_WIDE_INT x)
599 return x ? CTZ_HWI (x) : -1;
601 return floor_log2 (x);
605 #endif /* GCC_VERSION < 3004 || !defined (__cplusplus) */
607 /* Handler for fatal signals, such as SIGSEGV. These are transformed
608 into ICE messages, which is much more user friendly. In case the
609 error printer crashes, reset the signal to prevent infinite recursion. */
612 crash_signal (int signo)
614 signal (signo, SIG_DFL);
616 /* If we crashed while processing an ASM statement, then be a little more
617 graceful. It's most likely the user's fault. */
618 if (this_is_asm_operands)
620 output_operand_lossage ("unrecoverable error");
621 exit (FATAL_EXIT_CODE);
624 internal_error ("%s", strsignal (signo));
627 /* Arrange to dump core on error. (The regular error message is still
628 printed first, except in the case of abort().) */
631 setup_core_dumping (void)
634 signal (SIGABRT, SIG_DFL);
636 #if defined(HAVE_SETRLIMIT)
639 if (getrlimit (RLIMIT_CORE, &rlim) != 0)
640 fatal_error ("getting core file size maximum limit: %m");
641 rlim.rlim_cur = rlim.rlim_max;
642 if (setrlimit (RLIMIT_CORE, &rlim) != 0)
643 fatal_error ("setting core file size limit to maximum: %m");
646 diagnostic_abort_on_error (global_dc);
650 /* Strip off a legitimate source ending from the input string NAME of
651 length LEN. Rather than having to know the names used by all of
652 our front ends, we strip off an ending of a period followed by
653 up to five characters. (Java uses ".class".) */
656 strip_off_ending (char *name, int len)
659 for (i = 2; i < 6 && len > i; i++)
661 if (name[len - i] == '.')
663 name[len - i] = '\0';
669 /* Output a quoted string. */
672 output_quoted_string (FILE *asm_file, const char *string)
674 #ifdef OUTPUT_QUOTED_STRING
675 OUTPUT_QUOTED_STRING (asm_file, string);
679 putc ('\"', asm_file);
680 while ((c = *string++) != 0)
684 if (c == '\"' || c == '\\')
685 putc ('\\', asm_file);
689 fprintf (asm_file, "\\%03o", (unsigned char) c);
691 putc ('\"', asm_file);
695 /* Output a file name in the form wanted by System V. */
698 output_file_directive (FILE *asm_file, const char *input_name)
703 if (input_name == NULL)
704 input_name = "<stdin>";
706 len = strlen (input_name);
707 na = input_name + len;
709 /* NA gets INPUT_NAME sans directory names. */
710 while (na > input_name)
712 if (IS_DIR_SEPARATOR (na[-1]))
717 #ifdef ASM_OUTPUT_SOURCE_FILENAME
718 ASM_OUTPUT_SOURCE_FILENAME (asm_file, na);
720 fprintf (asm_file, "\t.file\t");
721 output_quoted_string (asm_file, na);
722 fputc ('\n', asm_file);
726 /* A subroutine of wrapup_global_declarations. We've come to the end of
727 the compilation unit. All deferred variables should be undeferred,
728 and all incomplete decls should be finalized. */
731 wrapup_global_declaration_1 (tree decl)
733 /* We're not deferring this any longer. Assignment is conditional to
734 avoid needlessly dirtying PCH pages. */
735 if (CODE_CONTAINS_STRUCT (TREE_CODE (decl), TS_DECL_WITH_VIS)
736 && DECL_DEFER_OUTPUT (decl) != 0)
737 DECL_DEFER_OUTPUT (decl) = 0;
739 if (TREE_CODE (decl) == VAR_DECL && DECL_SIZE (decl) == 0)
740 lang_hooks.finish_incomplete_decl (decl);
743 /* A subroutine of wrapup_global_declarations. Decide whether or not DECL
744 needs to be output. Return true if it is output. */
747 wrapup_global_declaration_2 (tree decl)
749 if (TREE_ASM_WRITTEN (decl) || DECL_EXTERNAL (decl))
752 /* Don't write out static consts, unless we still need them.
754 We also keep static consts if not optimizing (for debugging),
755 unless the user specified -fno-keep-static-consts.
756 ??? They might be better written into the debug information.
757 This is possible when using DWARF.
759 A language processor that wants static constants to be always
760 written out (even if it is not used) is responsible for
761 calling rest_of_decl_compilation itself. E.g. the C front-end
762 calls rest_of_decl_compilation from finish_decl.
763 One motivation for this is that is conventional in some
764 environments to write things like:
765 static const char rcsid[] = "... version string ...";
766 intending to force the string to be in the executable.
768 A language processor that would prefer to have unneeded
769 static constants "optimized away" would just defer writing
770 them out until here. E.g. C++ does this, because static
771 constants are often defined in header files.
773 ??? A tempting alternative (for both C and C++) would be
774 to force a constant to be written if and only if it is
775 defined in a main file, as opposed to an include file. */
777 if (TREE_CODE (decl) == VAR_DECL && TREE_STATIC (decl))
779 struct varpool_node *node;
781 node = varpool_node (decl);
785 else if (node->alias)
787 else if (!cgraph_global_info_ready
789 || TREE_USED (DECL_ASSEMBLER_NAME (decl))))
791 else if (node->needed)
793 else if (DECL_COMDAT (decl))
795 else if (TREE_READONLY (decl) && !TREE_PUBLIC (decl)
796 && (optimize || !flag_keep_static_consts
797 || DECL_ARTIFICIAL (decl)))
802 rest_of_decl_compilation (decl, 1, 1);
810 /* Do any final processing required for the declarations in VEC, of
811 which there are LEN. We write out inline functions and variables
812 that have been deferred until this point, but which are required.
813 Returns nonzero if anything was put out. */
816 wrapup_global_declarations (tree *vec, int len)
818 bool reconsider, output_something = false;
821 for (i = 0; i < len; i++)
822 wrapup_global_declaration_1 (vec[i]);
824 /* Now emit any global variables or functions that we have been
825 putting off. We need to loop in case one of the things emitted
826 here references another one which comes earlier in the list. */
830 for (i = 0; i < len; i++)
831 reconsider |= wrapup_global_declaration_2 (vec[i]);
833 output_something = true;
837 return output_something;
840 /* A subroutine of check_global_declarations. Issue appropriate warnings
841 for the global declaration DECL. */
844 check_global_declaration_1 (tree decl)
846 /* Warn about any function declared static but not defined. We don't
847 warn about variables, because many programs have static variables
848 that exist only to get some text into the object file. */
849 if (TREE_CODE (decl) == FUNCTION_DECL
850 && DECL_INITIAL (decl) == 0
851 && DECL_EXTERNAL (decl)
852 && ! DECL_ARTIFICIAL (decl)
853 && ! TREE_NO_WARNING (decl)
854 && ! TREE_PUBLIC (decl)
855 && (warn_unused_function
856 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl))))
858 if (TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl)))
859 pedwarn ("%q+F used but never defined", decl);
861 warning (0, "%q+F declared %<static%> but never defined", decl);
862 /* This symbol is effectively an "extern" declaration now. */
863 TREE_PUBLIC (decl) = 1;
864 assemble_external (decl);
867 /* Warn about static fns or vars defined but not used. */
868 if (((warn_unused_function && TREE_CODE (decl) == FUNCTION_DECL)
869 /* We don't warn about "static const" variables because the
870 "rcs_id" idiom uses that construction. */
871 || (warn_unused_variable
872 && TREE_CODE (decl) == VAR_DECL && ! TREE_READONLY (decl)))
873 && ! DECL_IN_SYSTEM_HEADER (decl)
874 && ! TREE_USED (decl)
875 /* The TREE_USED bit for file-scope decls is kept in the identifier,
876 to handle multiple external decls in different scopes. */
877 && ! (DECL_NAME (decl) && TREE_USED (DECL_NAME (decl)))
878 && ! DECL_EXTERNAL (decl)
879 && ! TREE_PUBLIC (decl)
880 /* A volatile variable might be used in some non-obvious way. */
881 && ! TREE_THIS_VOLATILE (decl)
882 /* Global register variables must be declared to reserve them. */
883 && ! (TREE_CODE (decl) == VAR_DECL && DECL_REGISTER (decl))
884 /* Otherwise, ask the language. */
885 && lang_hooks.decls.warn_unused_global (decl))
886 warning (0, "%q+D defined but not used", decl);
889 /* Issue appropriate warnings for the global declarations in VEC (of
890 which there are LEN). */
893 check_global_declarations (tree *vec, int len)
897 for (i = 0; i < len; i++)
898 check_global_declaration_1 (vec[i]);
901 /* Emit debugging information for all global declarations in VEC. */
904 emit_debug_global_declarations (tree *vec, int len)
908 /* Avoid confusing the debug information machinery when there are errors. */
909 if (errorcount != 0 || sorrycount != 0)
912 timevar_push (TV_SYMOUT);
913 for (i = 0; i < len; i++)
914 debug_hooks->global_decl (vec[i]);
915 timevar_pop (TV_SYMOUT);
918 /* Warn about a use of an identifier which was marked deprecated. */
920 warn_deprecated_use (tree node)
922 if (node == 0 || !warn_deprecated_decl)
927 expanded_location xloc = expand_location (DECL_SOURCE_LOCATION (node));
928 warning (OPT_Wdeprecated_declarations,
929 "%qD is deprecated (declared at %s:%d)",
930 node, xloc.file, xloc.line);
932 else if (TYPE_P (node))
934 const char *what = NULL;
935 tree decl = TYPE_STUB_DECL (node);
937 if (TYPE_NAME (node))
939 if (TREE_CODE (TYPE_NAME (node)) == IDENTIFIER_NODE)
940 what = IDENTIFIER_POINTER (TYPE_NAME (node));
941 else if (TREE_CODE (TYPE_NAME (node)) == TYPE_DECL
942 && DECL_NAME (TYPE_NAME (node)))
943 what = IDENTIFIER_POINTER (DECL_NAME (TYPE_NAME (node)));
948 expanded_location xloc
949 = expand_location (DECL_SOURCE_LOCATION (decl));
951 warning (OPT_Wdeprecated_declarations,
952 "%qs is deprecated (declared at %s:%d)", what,
953 xloc.file, xloc.line);
955 warning (OPT_Wdeprecated_declarations,
956 "type is deprecated (declared at %s:%d)",
957 xloc.file, xloc.line);
962 warning (OPT_Wdeprecated_declarations, "%qs is deprecated", what);
964 warning (OPT_Wdeprecated_declarations, "type is deprecated");
969 /* Save the current INPUT_LOCATION on the top entry in the
970 INPUT_FILE_STACK. Push a new entry for FILE and LINE, and set the
971 INPUT_LOCATION accordingly. */
974 #ifdef USE_MAPPED_LOCATION
975 push_srcloc (location_t fline)
977 push_srcloc (const char *file, int line)
980 struct file_stack *fs;
982 gcc_assert (!input_file_stack_restored);
983 if (input_file_stack_tick == (int) ((1U << INPUT_FILE_STACK_BITS) - 1))
984 sorry ("GCC supports only %d input file changes", input_file_stack_tick);
986 fs = XNEW (struct file_stack);
987 fs->location = input_location;
988 fs->next = input_file_stack;
989 #ifdef USE_MAPPED_LOCATION
990 input_location = fline;
992 input_filename = file;
995 input_file_stack = fs;
996 input_file_stack_tick++;
997 VEC_safe_push (fs_p, heap, input_file_stack_history, input_file_stack);
1000 /* Pop the top entry off the stack of presently open source files.
1001 Restore the INPUT_LOCATION from the new topmost entry on the
1007 struct file_stack *fs;
1009 gcc_assert (!input_file_stack_restored);
1010 if (input_file_stack_tick == (int) ((1U << INPUT_FILE_STACK_BITS) - 1))
1011 sorry ("GCC supports only %d input file changes", input_file_stack_tick);
1013 fs = input_file_stack;
1014 input_location = fs->location;
1015 input_file_stack = fs->next;
1016 input_file_stack_tick++;
1017 VEC_safe_push (fs_p, heap, input_file_stack_history, input_file_stack);
1020 /* Restore the input file stack to its state as of TICK, for the sake
1021 of diagnostics after processing the whole input. Once this has
1022 been called, push_srcloc and pop_srcloc may no longer be
1025 restore_input_file_stack (int tick)
1028 input_file_stack = NULL;
1030 input_file_stack = VEC_index (fs_p, input_file_stack_history, tick - 1);
1031 input_file_stack_tick = tick;
1032 input_file_stack_restored = true;
1035 /* Compile an entire translation unit. Write a file of assembly
1036 output and various debugging dumps. */
1041 /* Initialize yet another pass. */
1044 init_final (main_input_filename);
1045 coverage_init (aux_base_name);
1047 timevar_push (TV_PARSE);
1049 /* Call the parser, which parses the entire file (calling
1050 rest_of_compilation for each function). */
1051 lang_hooks.parse_file (set_yydebug);
1053 /* In case there were missing block closers,
1054 get us back to the global binding level. */
1055 lang_hooks.clear_binding_stack ();
1057 /* Compilation is now finished except for writing
1058 what's left of the symbol table output. */
1059 timevar_pop (TV_PARSE);
1061 if (flag_syntax_only)
1064 lang_hooks.decls.final_write_globals ();
1066 if (errorcount || sorrycount)
1069 varpool_assemble_pending_decls ();
1070 finish_aliases_2 ();
1072 /* This must occur after the loop to output deferred functions.
1073 Else the coverage initializer would not be emitted if all the
1074 functions in this compilation unit were deferred. */
1077 /* Likewise for mudflap static object registrations. */
1079 mudflap_finish_file ();
1081 /* Likewise for emulated thread-local storage. */
1082 if (!targetm.have_tls)
1085 output_shared_constant_pool ();
1086 output_object_blocks ();
1088 /* Write out any pending weak symbol declarations. */
1091 /* Do dbx symbols. */
1092 timevar_push (TV_SYMOUT);
1094 #if defined DWARF2_DEBUGGING_INFO || defined DWARF2_UNWIND_INFO
1095 if (dwarf2out_do_frame ())
1096 dwarf2out_frame_finish ();
1099 (*debug_hooks->finish) (main_input_filename);
1100 timevar_pop (TV_SYMOUT);
1102 /* Output some stuff at end of file if nec. */
1104 dw2_output_indirect_constants ();
1106 /* Flush any pending external directives. */
1107 process_pending_assemble_externals ();
1109 /* Attach a special .ident directive to the end of the file to identify
1110 the version of GCC which compiled this code. The format of the .ident
1111 string is patterned after the ones produced by native SVR4 compilers. */
1114 fprintf (asm_out_file, "%s\"GCC: (GNU) %s\"\n",
1115 IDENT_ASM_OP, version_string);
1118 /* This must be at the end. Some target ports emit end of file directives
1119 into the assembly file here, and hence we can not output anything to the
1120 assembly file after this point. */
1121 targetm.asm_out.file_end ();
1124 /* Parse a -d... command line switch. */
1127 decode_d_option (const char *arg)
1138 flag_print_asm_name = 1;
1141 flag_dump_rtl_in_asm = 1;
1142 flag_print_asm_name = 1;
1145 graph_dump_format = vcg;
1148 rtl_dump_and_exit = 1;
1153 case 'D': /* These are handled by the preprocessor. */
1157 setup_core_dumping();
1162 if (!enable_rtl_dump_file (c))
1163 warning (0, "unrecognized gcc debugging option: %c", c);
1168 /* Indexed by enum debug_info_type. */
1169 const char *const debug_type_names[] =
1171 "none", "stabs", "coff", "dwarf-2", "xcoff", "vms"
1174 /* Print version information to FILE.
1175 Each line begins with INDENT (for the case where FILE is the
1176 assembler output file). */
1179 print_version (FILE *file, const char *indent)
1181 static const char fmt1[] =
1183 N_("%s%s%s version %s (%s)\n%s\tcompiled by GNU C version %s.\n")
1185 N_("%s%s%s version %s (%s) compiled by CC.\n")
1188 static const char fmt2[] =
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 file == stderr ? _(fmt2) : fmt2,
1200 indent, *indent != 0 ? " " : "",
1201 PARAM_VALUE (GGC_MIN_EXPAND), PARAM_VALUE (GGC_MIN_HEAPSIZE));
1204 #ifdef ASM_COMMENT_START
1206 print_to_asm_out_file (print_switch_type type, const char * text)
1208 bool prepend_sep = true;
1212 case SWITCH_TYPE_LINE_END:
1213 putc ('\n', asm_out_file);
1216 case SWITCH_TYPE_LINE_START:
1217 fputs (ASM_COMMENT_START, asm_out_file);
1218 return strlen (ASM_COMMENT_START);
1220 case SWITCH_TYPE_DESCRIPTIVE:
1221 if (ASM_COMMENT_START[0] == 0)
1222 prepend_sep = false;
1224 case SWITCH_TYPE_PASSED:
1225 case SWITCH_TYPE_ENABLED:
1227 fputc (' ', asm_out_file);
1228 fprintf (asm_out_file, text);
1229 /* No need to return the length here as
1230 print_single_switch has already done it. */
1240 print_to_stderr (print_switch_type type, const char * text)
1244 case SWITCH_TYPE_LINE_END:
1245 putc ('\n', stderr);
1248 case SWITCH_TYPE_LINE_START:
1251 case SWITCH_TYPE_PASSED:
1252 case SWITCH_TYPE_ENABLED:
1253 fputc (' ', stderr);
1256 case SWITCH_TYPE_DESCRIPTIVE:
1257 fprintf (stderr, text);
1258 /* No need to return the length here as
1259 print_single_switch has already done it. */
1267 /* Print an option value and return the adjusted position in the line.
1268 ??? print_fn doesn't handle errors, eg disk full; presumably other
1269 code will catch a disk full though. */
1272 print_single_switch (print_switch_fn_type print_fn,
1274 print_switch_type type,
1277 /* The ultrix fprintf returns 0 on success, so compute the result
1278 we want here since we need it for the following test. The +1
1279 is for the separator character that will probably be emitted. */
1280 int len = strlen (text) + 1;
1283 && pos + len > MAX_LINE)
1285 print_fn (SWITCH_TYPE_LINE_END, NULL);
1290 pos += print_fn (SWITCH_TYPE_LINE_START, NULL);
1292 print_fn (type, text);
1296 /* Print active target switches using PRINT_FN.
1297 POS is the current cursor position and MAX is the size of a "line".
1298 Each line begins with INDENT and ends with TERM.
1299 Each switch is separated from the next by SEP. */
1302 print_switch_values (print_switch_fn_type print_fn)
1308 /* Fill in the -frandom-seed option, if the user didn't pass it, so
1309 that it can be printed below. This helps reproducibility. */
1310 if (!flag_random_seed)
1311 init_random_seed ();
1313 /* Print the options as passed. */
1314 pos = print_single_switch (print_fn, pos,
1315 SWITCH_TYPE_DESCRIPTIVE, _("options passed: "));
1317 for (p = &save_argv[1]; *p != NULL; p++)
1322 if (strcmp (*p, "-o") == 0
1323 || strcmp (*p, "-dumpbase") == 0
1324 || strcmp (*p, "-auxbase") == 0)
1331 if (strcmp (*p, "-quiet") == 0
1332 || strcmp (*p, "-version") == 0)
1339 pos = print_single_switch (print_fn, pos, SWITCH_TYPE_PASSED, *p);
1343 print_fn (SWITCH_TYPE_LINE_END, NULL);
1345 /* Print the -f and -m options that have been enabled.
1346 We don't handle language specific options but printing argv
1348 pos = print_single_switch (print_fn, 0,
1349 SWITCH_TYPE_DESCRIPTIVE, _("options enabled: "));
1351 for (j = 0; j < cl_options_count; j++)
1352 if ((cl_options[j].flags & CL_REPORT)
1353 && option_enabled (j) > 0)
1354 pos = print_single_switch (print_fn, pos,
1355 SWITCH_TYPE_ENABLED, cl_options[j].opt_text);
1357 print_fn (SWITCH_TYPE_LINE_END, NULL);
1360 /* Open assembly code output file. Do this even if -fsyntax-only is
1361 on, because then the driver will have provided the name of a
1362 temporary file or bit bucket for us. NAME is the file specified on
1363 the command line, possibly NULL. */
1365 init_asm_output (const char *name)
1367 if (name == NULL && asm_file_name == 0)
1368 asm_out_file = stdout;
1371 if (asm_file_name == 0)
1373 int len = strlen (dump_base_name);
1374 char *dumpname = XNEWVEC (char, len + 6);
1376 memcpy (dumpname, dump_base_name, len + 1);
1377 strip_off_ending (dumpname, len);
1378 strcat (dumpname, ".s");
1379 asm_file_name = dumpname;
1381 if (!strcmp (asm_file_name, "-"))
1382 asm_out_file = stdout;
1384 asm_out_file = fopen (asm_file_name, "w+b");
1385 if (asm_out_file == 0)
1386 fatal_error ("can%'t open %s for writing: %m", asm_file_name);
1389 if (!flag_syntax_only)
1391 targetm.asm_out.file_start ();
1393 if (flag_record_gcc_switches)
1395 if (targetm.asm_out.record_gcc_switches)
1397 /* Let the target know that we are about to start recording. */
1398 targetm.asm_out.record_gcc_switches (SWITCH_TYPE_DESCRIPTIVE,
1400 /* Now record the switches. */
1401 print_switch_values (targetm.asm_out.record_gcc_switches);
1402 /* Let the target know that the recording is over. */
1403 targetm.asm_out.record_gcc_switches (SWITCH_TYPE_DESCRIPTIVE,
1407 inform ("-frecord-gcc-switches is not supported by the current target");
1410 #ifdef ASM_COMMENT_START
1411 if (flag_verbose_asm)
1413 /* Print the list of switches in effect
1414 into the assembler file as comments. */
1415 print_version (asm_out_file, ASM_COMMENT_START);
1416 print_switch_values (print_to_asm_out_file);
1417 fprintf (asm_out_file, "\n");
1423 /* Return true if the state of option OPTION should be stored in PCH files
1424 and checked by default_pch_valid_p. Store the option's current state
1428 option_affects_pch_p (int option, struct cl_option_state *state)
1430 if ((cl_options[option].flags & CL_TARGET) == 0)
1432 if (cl_options[option].flag_var == &target_flags)
1433 if (targetm.check_pch_target_flags)
1435 return get_option_state (option, state);
1438 /* Default version of get_pch_validity.
1439 By default, every flag difference is fatal; that will be mostly right for
1440 most targets, but completely right for very few. */
1443 default_get_pch_validity (size_t *len)
1445 struct cl_option_state state;
1450 if (targetm.check_pch_target_flags)
1451 *len += sizeof (target_flags);
1452 for (i = 0; i < cl_options_count; i++)
1453 if (option_affects_pch_p (i, &state))
1456 result = r = XNEWVEC (char, *len);
1460 if (targetm.check_pch_target_flags)
1462 memcpy (r, &target_flags, sizeof (target_flags));
1463 r += sizeof (target_flags);
1466 for (i = 0; i < cl_options_count; i++)
1467 if (option_affects_pch_p (i, &state))
1469 memcpy (r, state.data, state.size);
1476 /* Return a message which says that a PCH file was created with a different
1477 setting of OPTION. */
1480 pch_option_mismatch (const char *option)
1484 asprintf (&r, _("created and used with differing settings of '%s'"), option);
1486 return _("out of memory");
1490 /* Default version of pch_valid_p. */
1493 default_pch_valid_p (const void *data_p, size_t len)
1495 struct cl_option_state state;
1496 const char *data = (const char *)data_p;
1499 /* -fpic and -fpie also usually make a PCH invalid. */
1500 if (data[0] != flag_pic)
1501 return _("created and used with different settings of -fpic");
1502 if (data[1] != flag_pie)
1503 return _("created and used with different settings of -fpie");
1506 /* Check target_flags. */
1507 if (targetm.check_pch_target_flags)
1512 memcpy (&tf, data, sizeof (target_flags));
1513 data += sizeof (target_flags);
1514 len -= sizeof (target_flags);
1515 r = targetm.check_pch_target_flags (tf);
1520 for (i = 0; i < cl_options_count; i++)
1521 if (option_affects_pch_p (i, &state))
1523 if (memcmp (data, state.data, state.size) != 0)
1524 return pch_option_mismatch (cl_options[i].opt_text);
1532 /* Default tree printer. Handles declarations only. */
1534 default_tree_printer (pretty_printer * pp, text_info *text, const char *spec,
1535 int precision, bool wide, bool set_locus, bool hash)
1539 /* FUTURE: %+x should set the locus. */
1540 if (precision != 0 || wide || hash)
1546 t = va_arg (*text->args_ptr, tree);
1547 if (DECL_DEBUG_EXPR_IS_FROM (t) && DECL_DEBUG_EXPR (t))
1548 t = DECL_DEBUG_EXPR (t);
1553 t = va_arg (*text->args_ptr, tree);
1560 if (set_locus && text->locus)
1561 *text->locus = DECL_SOURCE_LOCATION (t);
1565 const char *n = DECL_NAME (t)
1566 ? lang_hooks.decl_printable_name (t, 2)
1571 dump_generic_node (pp, t, 0, TDF_DIAGNOSTIC, 0);
1576 /* Initialization of the front end environment, before command line
1577 options are parsed. Signal handlers, internationalization etc.
1578 ARGV0 is main's argv[0]. */
1580 general_init (const char *argv0)
1584 p = argv0 + strlen (argv0);
1585 while (p != argv0 && !IS_DIR_SEPARATOR (p[-1]))
1589 xmalloc_set_program_name (progname);
1593 /* Unlock the stdio streams. */
1594 unlock_std_streams ();
1596 gcc_init_libintl ();
1598 /* Initialize the diagnostics reporting machinery, so option parsing
1599 can give warnings and errors. */
1600 diagnostic_initialize (global_dc);
1601 /* Set a default printer. Language specific initializations will
1602 override it later. */
1603 pp_format_decoder (global_dc->printer) = &default_tree_printer;
1605 /* Trap fatal signals, e.g. SIGSEGV, and convert them to ICE messages. */
1607 signal (SIGSEGV, crash_signal);
1610 signal (SIGILL, crash_signal);
1613 signal (SIGBUS, crash_signal);
1616 signal (SIGABRT, crash_signal);
1618 #if defined SIGIOT && (!defined SIGABRT || SIGABRT != SIGIOT)
1619 signal (SIGIOT, crash_signal);
1622 signal (SIGFPE, crash_signal);
1625 /* Other host-specific signal setup. */
1626 (*host_hooks.extra_signals)();
1628 /* Initialize the garbage-collector, string pools and tree type hash
1632 linemap_init (&line_table);
1635 /* Initialize register usage now so switches may override. */
1638 /* Register the language-independent parameters. */
1639 add_params (lang_independent_params, LAST_PARAM);
1641 /* This must be done after add_params but before argument processing. */
1642 init_ggc_heuristics();
1643 init_optimization_passes ();
1646 /* Return true if the current target supports -fsection-anchors. */
1649 target_supports_section_anchors_p (void)
1651 if (targetm.min_anchor_offset == 0 && targetm.max_anchor_offset == 0)
1654 if (targetm.asm_out.output_anchor == NULL)
1660 /* Process the options that have been parsed. */
1662 process_options (void)
1664 /* Just in case lang_hooks.post_options ends up calling a debug_hook.
1665 This can happen with incorrect pre-processed input. */
1666 debug_hooks = &do_nothing_debug_hooks;
1668 /* Allow the front end to perform consistency checks and do further
1669 initialization based on the command line options. This hook also
1670 sets the original filename if appropriate (e.g. foo.i -> foo.c)
1671 so we can correctly initialize debug output. */
1672 no_backend = lang_hooks.post_options (&main_input_filename);
1673 #ifndef USE_MAPPED_LOCATION
1674 input_filename = main_input_filename;
1677 #ifdef OVERRIDE_OPTIONS
1678 /* Some machines may reject certain combinations of options. */
1682 if (flag_section_anchors && !target_supports_section_anchors_p ())
1684 warning (OPT_fsection_anchors,
1685 "this target does not support %qs", "-fsection-anchors");
1686 flag_section_anchors = 0;
1689 if (flag_short_enums == 2)
1690 flag_short_enums = targetm.default_short_enums ();
1692 /* Set aux_base_name if not already set. */
1695 else if (main_input_filename)
1697 char *name = xstrdup (lbasename (main_input_filename));
1699 strip_off_ending (name, strlen (name));
1700 aux_base_name = name;
1703 aux_base_name = "gccaux";
1705 /* Set up the align_*_log variables, defaulting them to 1 if they
1706 were still unset. */
1707 if (align_loops <= 0) align_loops = 1;
1708 if (align_loops_max_skip > align_loops || !align_loops)
1709 align_loops_max_skip = align_loops - 1;
1710 align_loops_log = floor_log2 (align_loops * 2 - 1);
1711 if (align_jumps <= 0) align_jumps = 1;
1712 if (align_jumps_max_skip > align_jumps || !align_jumps)
1713 align_jumps_max_skip = align_jumps - 1;
1714 align_jumps_log = floor_log2 (align_jumps * 2 - 1);
1715 if (align_labels <= 0) align_labels = 1;
1716 align_labels_log = floor_log2 (align_labels * 2 - 1);
1717 if (align_labels_max_skip > align_labels || !align_labels)
1718 align_labels_max_skip = align_labels - 1;
1719 if (align_functions <= 0) align_functions = 1;
1720 align_functions_log = floor_log2 (align_functions * 2 - 1);
1722 /* Unrolling all loops implies that standard loop unrolling must also
1724 if (flag_unroll_all_loops)
1725 flag_unroll_loops = 1;
1727 /* The loop unrolling code assumes that cse will be run after loop.
1728 web and rename-registers also help when run after loop unrolling. */
1730 if (flag_rerun_cse_after_loop == AUTODETECT_VALUE)
1731 flag_rerun_cse_after_loop = flag_unroll_loops || flag_peel_loops;
1732 if (flag_web == AUTODETECT_VALUE)
1733 flag_web = flag_unroll_loops || flag_peel_loops;
1734 if (flag_rename_registers == AUTODETECT_VALUE)
1735 flag_rename_registers = flag_unroll_loops || flag_peel_loops;
1737 if (flag_non_call_exceptions)
1738 flag_asynchronous_unwind_tables = 1;
1739 if (flag_asynchronous_unwind_tables)
1740 flag_unwind_tables = 1;
1742 /* Disable unit-at-a-time mode for frontends not supporting callgraph
1744 if (flag_unit_at_a_time && ! lang_hooks.callgraph.expand_function)
1745 flag_unit_at_a_time = 0;
1747 if (!flag_unit_at_a_time)
1748 flag_section_anchors = 0;
1750 if (flag_value_profile_transformations)
1751 flag_profile_values = 1;
1753 /* Warn about options that are not supported on this machine. */
1754 #ifndef INSN_SCHEDULING
1755 if (flag_schedule_insns || flag_schedule_insns_after_reload)
1756 warning (0, "instruction scheduling not supported on this target machine");
1759 if (flag_delayed_branch)
1760 warning (0, "this target machine does not have delayed branches");
1763 user_label_prefix = USER_LABEL_PREFIX;
1764 if (flag_leading_underscore != -1)
1766 /* If the default prefix is more complicated than "" or "_",
1767 issue a warning and ignore this option. */
1768 if (user_label_prefix[0] == 0 ||
1769 (user_label_prefix[0] == '_' && user_label_prefix[1] == 0))
1771 user_label_prefix = flag_leading_underscore ? "_" : "";
1774 warning (0, "-f%sleading-underscore not supported on this target machine",
1775 flag_leading_underscore ? "" : "no-");
1778 /* If we are in verbose mode, write out the version and maybe all the
1779 option flags in use. */
1782 print_version (stderr, "");
1784 print_switch_values (print_to_stderr);
1787 if (flag_syntax_only)
1789 write_symbols = NO_DEBUG;
1793 /* A lot of code assumes write_symbols == NO_DEBUG if the debugging
1795 if (debug_info_level == DINFO_LEVEL_NONE)
1796 write_symbols = NO_DEBUG;
1798 /* Now we know write_symbols, set up the debug hooks based on it.
1799 By default we do nothing for debug output. */
1800 if (PREFERRED_DEBUGGING_TYPE == NO_DEBUG)
1801 default_debug_hooks = &do_nothing_debug_hooks;
1802 #if defined(DBX_DEBUGGING_INFO)
1803 else if (PREFERRED_DEBUGGING_TYPE == DBX_DEBUG)
1804 default_debug_hooks = &dbx_debug_hooks;
1806 #if defined(XCOFF_DEBUGGING_INFO)
1807 else if (PREFERRED_DEBUGGING_TYPE == XCOFF_DEBUG)
1808 default_debug_hooks = &xcoff_debug_hooks;
1810 #ifdef SDB_DEBUGGING_INFO
1811 else if (PREFERRED_DEBUGGING_TYPE == SDB_DEBUG)
1812 default_debug_hooks = &sdb_debug_hooks;
1814 #ifdef DWARF2_DEBUGGING_INFO
1815 else if (PREFERRED_DEBUGGING_TYPE == DWARF2_DEBUG)
1816 default_debug_hooks = &dwarf2_debug_hooks;
1818 #ifdef VMS_DEBUGGING_INFO
1819 else if (PREFERRED_DEBUGGING_TYPE == VMS_DEBUG
1820 || PREFERRED_DEBUGGING_TYPE == VMS_AND_DWARF2_DEBUG)
1821 default_debug_hooks = &vmsdbg_debug_hooks;
1824 if (write_symbols == NO_DEBUG)
1826 #if defined(DBX_DEBUGGING_INFO)
1827 else if (write_symbols == DBX_DEBUG)
1828 debug_hooks = &dbx_debug_hooks;
1830 #if defined(XCOFF_DEBUGGING_INFO)
1831 else if (write_symbols == XCOFF_DEBUG)
1832 debug_hooks = &xcoff_debug_hooks;
1834 #ifdef SDB_DEBUGGING_INFO
1835 else if (write_symbols == SDB_DEBUG)
1836 debug_hooks = &sdb_debug_hooks;
1838 #ifdef DWARF2_DEBUGGING_INFO
1839 else if (write_symbols == DWARF2_DEBUG)
1840 debug_hooks = &dwarf2_debug_hooks;
1842 #ifdef VMS_DEBUGGING_INFO
1843 else if (write_symbols == VMS_DEBUG || write_symbols == VMS_AND_DWARF2_DEBUG)
1844 debug_hooks = &vmsdbg_debug_hooks;
1847 error ("target system does not support the \"%s\" debug format",
1848 debug_type_names[write_symbols]);
1850 /* Now we know which debug output will be used so we can set
1851 flag_var_tracking, flag_rename_registers if the user has
1852 not specified them. */
1853 if (debug_info_level < DINFO_LEVEL_NORMAL
1854 || debug_hooks->var_location == do_nothing_debug_hooks.var_location)
1856 if (flag_var_tracking == 1)
1858 if (debug_info_level < DINFO_LEVEL_NORMAL)
1859 warning (0, "variable tracking requested, but useless unless "
1860 "producing debug info");
1862 warning (0, "variable tracking requested, but not supported "
1863 "by this debug format");
1865 flag_var_tracking = 0;
1868 if (flag_rename_registers == AUTODETECT_VALUE)
1869 flag_rename_registers = default_debug_hooks->var_location
1870 != do_nothing_debug_hooks.var_location;
1872 if (flag_var_tracking == AUTODETECT_VALUE)
1873 flag_var_tracking = optimize >= 1;
1875 /* If auxiliary info generation is desired, open the output file.
1876 This goes in the same directory as the source file--unlike
1877 all the other output files. */
1878 if (flag_gen_aux_info)
1880 aux_info_file = fopen (aux_info_file_name, "w");
1881 if (aux_info_file == 0)
1882 fatal_error ("can%'t open %s: %m", aux_info_file_name);
1885 if (! targetm.have_named_sections)
1887 if (flag_function_sections)
1889 warning (0, "-ffunction-sections not supported for this target");
1890 flag_function_sections = 0;
1892 if (flag_data_sections)
1894 warning (0, "-fdata-sections not supported for this target");
1895 flag_data_sections = 0;
1899 if (flag_function_sections && profile_flag)
1901 warning (0, "-ffunction-sections disabled; it makes profiling impossible");
1902 flag_function_sections = 0;
1905 #ifndef HAVE_prefetch
1906 if (flag_prefetch_loop_arrays)
1908 warning (0, "-fprefetch-loop-arrays not supported for this target");
1909 flag_prefetch_loop_arrays = 0;
1912 if (flag_prefetch_loop_arrays && !HAVE_prefetch)
1914 warning (0, "-fprefetch-loop-arrays not supported for this target (try -march switches)");
1915 flag_prefetch_loop_arrays = 0;
1919 /* This combination of options isn't handled for i386 targets and doesn't
1920 make much sense anyway, so don't allow it. */
1921 if (flag_prefetch_loop_arrays && optimize_size)
1923 warning (0, "-fprefetch-loop-arrays is not supported with -Os");
1924 flag_prefetch_loop_arrays = 0;
1927 #ifndef OBJECT_FORMAT_ELF
1928 #ifndef OBJECT_FORMAT_MACHO
1929 if (flag_function_sections && write_symbols != NO_DEBUG)
1930 warning (0, "-ffunction-sections may affect debugging on some targets");
1934 /* The presence of IEEE signaling NaNs, implies all math can trap. */
1935 if (flag_signaling_nans)
1936 flag_trapping_math = 1;
1938 /* With -fcx-limited-range, we do cheap and quick complex arithmetic. */
1939 if (flag_cx_limited_range)
1940 flag_complex_method = 0;
1942 /* Targets must be able to place spill slots at lower addresses. If the
1943 target already uses a soft frame pointer, the transition is trivial. */
1944 if (!FRAME_GROWS_DOWNWARD && flag_stack_protect)
1946 warning (0, "-fstack-protector not supported for this target");
1947 flag_stack_protect = 0;
1949 if (!flag_stack_protect)
1950 warn_stack_protect = 0;
1952 /* ??? Unwind info is not correct around the CFG unless either a frame
1953 pointer is present or A_O_A is set. Fixing this requires rewriting
1954 unwind info generation to be aware of the CFG and propagating states
1956 if (flag_unwind_tables && !ACCUMULATE_OUTGOING_ARGS
1957 && flag_omit_frame_pointer)
1959 warning (0, "unwind tables currently requires a frame pointer "
1961 flag_omit_frame_pointer = 0;
1965 /* Initialize the compiler back end. */
1969 init_emit_once (debug_info_level == DINFO_LEVEL_NORMAL
1970 || debug_info_level == DINFO_LEVEL_VERBOSE
1971 #ifdef VMS_DEBUGGING_INFO
1972 /* Enable line number info for traceback. */
1973 || debug_info_level > DINFO_LEVEL_NONE
1975 || flag_test_coverage);
1979 init_fake_stack_mems ();
1981 init_inline_once ();
1983 init_varasm_once ();
1985 /* The following initialization functions need to generate rtl, so
1986 provide a dummy function context for them. */
1987 init_dummy_function_start ();
1989 if (flag_caller_saves)
1990 init_caller_save ();
1991 expand_dummy_function_end ();
1994 /* Language-dependent initialization. Returns nonzero on success. */
1996 lang_dependent_init (const char *name)
1998 location_t save_loc = input_location;
1999 if (dump_base_name == 0)
2000 dump_base_name = name && name[0] ? name : "gccdump";
2002 /* Other front-end initialization. */
2003 #ifdef USE_MAPPED_LOCATION
2004 input_location = BUILTINS_LOCATION;
2006 input_filename = "<built-in>";
2009 if (lang_hooks.init () == 0)
2011 input_location = save_loc;
2013 init_asm_output (name);
2015 /* These create various _DECL nodes, so need to be called after the
2016 front end is initialized. */
2020 /* The following initialization functions need to generate rtl, so
2021 provide a dummy function context for them. */
2022 init_dummy_function_start ();
2025 /* Although the actions of init_set_costs are language-independent,
2026 it uses optabs, so we cannot call it from backend_init. */
2029 expand_dummy_function_end ();
2031 /* If dbx symbol table desired, initialize writing it and output the
2032 predefined types. */
2033 timevar_push (TV_SYMOUT);
2035 #if defined DWARF2_DEBUGGING_INFO || defined DWARF2_UNWIND_INFO
2036 if (dwarf2out_do_frame ())
2037 dwarf2out_frame_init ();
2040 /* Now we have the correct original filename, we can initialize
2042 (*debug_hooks->init) (name);
2044 timevar_pop (TV_SYMOUT);
2050 dump_memory_report (bool final)
2052 ggc_print_statistics ();
2053 stringpool_statistics ();
2054 dump_tree_statistics ();
2055 dump_rtx_statistics ();
2056 dump_varray_statistics ();
2057 dump_alloc_pool_statistics ();
2058 dump_bitmap_statistics ();
2059 dump_ggc_loc_statistics (final);
2062 /* Clean up: close opened files, etc. */
2067 /* Close the dump files. */
2068 if (flag_gen_aux_info)
2070 fclose (aux_info_file);
2072 unlink (aux_info_file_name);
2075 /* Close non-debugging input and output files. Take special care to note
2076 whether fclose returns an error, since the pages might still be on the
2077 buffer chain while the file is open. */
2081 if (ferror (asm_out_file) != 0)
2082 fatal_error ("error writing to %s: %m", asm_file_name);
2083 if (fclose (asm_out_file) != 0)
2084 fatal_error ("error closing %s: %m", asm_file_name);
2087 finish_optimization_passes ();
2090 dump_memory_report (true);
2092 /* Free up memory for the benefit of leak detectors. */
2095 /* Language-specific end of compilation actions. */
2096 lang_hooks.finish ();
2099 /* Initialize the compiler, and compile the input file. */
2103 /* Initialize timing first. The C front ends read the main file in
2104 the post_options hook, and C++ does file timings. */
2105 if (time_report || !quiet_flag || flag_detailed_statistics)
2107 timevar_start (TV_TOTAL);
2111 /* Don't do any more if an error has already occurred. */
2114 /* This must be run always, because it is needed to compute the FP
2115 predefined macros, such as __LDBL_MAX__, for targets using non
2116 default FP formats. */
2117 init_adjust_machine_modes ();
2119 /* Set up the back-end if requested. */
2123 /* Language-dependent initialization. Returns true on success. */
2124 if (lang_dependent_init (main_input_filename))
2130 /* Stop timing and print the times. */
2131 timevar_stop (TV_TOTAL);
2132 timevar_print (stderr);
2135 /* Entry point of cc1, cc1plus, jc1, f771, etc.
2136 Exit code is FATAL_EXIT_CODE if can't open files or if there were
2137 any errors, or SUCCESS_EXIT_CODE if compilation succeeded.
2139 It is not safe to call this function more than once. */
2142 toplev_main (unsigned int argc, const char **argv)
2146 /* Initialization of GCC's environment, and diagnostics. */
2147 general_init (argv[0]);
2149 /* Parse the options and do minimal processing; basically just
2150 enough to default flags appropriately. */
2151 decode_options (argc, argv);
2155 /* Exit early if we can (e.g. -help). */
2156 if (!exit_after_options)
2159 if (errorcount || sorrycount)
2160 return (FATAL_EXIT_CODE);
2162 return (SUCCESS_EXIT_CODE);