1 /* Top level of GCC compilers (cc1, cc1plus, etc.)
2 Copyright (C) 1987, 1988, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
3 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
4 Free Software Foundation, Inc.
6 This file is part of GCC.
8 GCC is free software; you can redistribute it and/or modify it under
9 the terms of the GNU General Public License as published by the Free
10 Software Foundation; either version 3, or (at your option) any later
13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING3. If not see
20 <http://www.gnu.org/licenses/>. */
22 /* This is the top level of cc1/c++.
23 It parses command args, opens files, invokes the various passes
24 in the proper order, and counts the time used by each.
25 Error messages and low-level interface to malloc also handled here. */
28 #undef FLOAT /* This is for hpux. They should change hpux. */
29 #undef FFS /* Some systems define this in param.h. */
31 #include "coretypes.h"
35 #ifdef HAVE_SYS_RESOURCE_H
36 # include <sys/resource.h>
39 #ifdef HAVE_SYS_TIMES_H
40 # include <sys/times.h>
50 #include "insn-attr.h"
51 #include "insn-config.h"
52 #include "insn-flags.h"
53 #include "hard-reg-set.h"
60 #include "basic-block.h"
66 #include "diagnostic.h"
70 #include "dwarf2asm.h"
71 #include "integrate.h"
75 #include "langhooks.h"
76 #include "cfglayout.h"
78 #include "hosthooks.h"
82 #include "value-prof.h"
83 #include "alloc-pool.h"
84 #include "tree-mudflap.h"
85 #include "tree-pass.h"
87 #include "tree-ssa-alias.h"
90 #if defined (DWARF2_UNWIND_INFO) || defined (DWARF2_DEBUGGING_INFO)
91 #include "dwarf2out.h"
94 #if defined(DBX_DEBUGGING_INFO) || defined(XCOFF_DEBUGGING_INFO)
98 #ifdef SDB_DEBUGGING_INFO
102 #ifdef XCOFF_DEBUGGING_INFO
103 #include "xcoffout.h" /* Needed for external data
104 declarations for e.g. AIX 4.x. */
107 static void general_init (const char *);
108 static void do_compile (void);
109 static void process_options (void);
110 static void backend_init (void);
111 static int lang_dependent_init (const char *);
112 static void init_asm_output (const char *);
113 static void finalize (void);
115 static void crash_signal (int) ATTRIBUTE_NORETURN;
116 static void setup_core_dumping (void);
117 static void compile_file (void);
119 /* Nonzero to dump debug info whilst parsing (-dy option). */
120 static int set_yydebug;
122 /* True if we don't need a backend (e.g. preprocessing only). */
123 static bool no_backend;
125 /* Length of line when printing switch values. */
128 /* Name of program invoked, sans directories. */
130 const char *progname;
132 /* Copy of argument vector to toplev_main. */
133 static const char **save_argv;
135 /* Name of top-level original source file (what was input to cpp).
136 This comes from the #-command at the beginning of the actual input.
137 If there isn't any there, then this is the cc1 input file name. */
139 const char *main_input_filename;
141 /* Used to enable -fvar-tracking, -fweb and -frename-registers according
142 to optimize and default_debug_hooks in process_options (). */
143 #define AUTODETECT_VALUE 2
145 /* Current position in real source file. */
147 location_t input_location;
149 struct line_maps *line_table;
151 /* Name to use as base of names for dump output files. */
153 const char *dump_base_name;
155 /* Name to use as a base for auxiliary output files. */
157 const char *aux_base_name;
159 /* Prefix for profile data files */
160 const char *profile_data_prefix;
162 /* A mask of target_flags that includes bit X if X was set or cleared
163 on the command line. */
165 int target_flags_explicit;
167 /* Debug hooks - dependent upon command line options. */
169 const struct gcc_debug_hooks *debug_hooks;
171 /* Debug hooks - target default. */
173 static const struct gcc_debug_hooks *default_debug_hooks;
175 /* Other flags saying which kinds of debugging dump have been requested. */
177 int rtl_dump_and_exit;
178 int flag_print_asm_name;
179 enum graph_dump_types graph_dump_format;
181 /* Name for output file of assembly code, specified with -o. */
183 const char *asm_file_name;
185 /* Nonzero means do optimizations. -O.
186 Particular numeric values stand for particular amounts of optimization;
187 thus, -O2 stores 2 here. However, the optimizations beyond the basic
188 ones are not controlled directly by this variable. Instead, they are
189 controlled by individual `flag_...' variables that are defaulted
190 based on this variable. */
194 /* Nonzero means optimize for size. -Os.
195 The only valid values are zero and nonzero. When optimize_size is
196 nonzero, optimize defaults to 2, but certain individual code
197 bloating optimizations are disabled. */
199 int optimize_size = 0;
201 /* The FUNCTION_DECL for the function currently being compiled,
202 or 0 if between functions. */
203 tree current_function_decl;
205 /* Set to the FUNC_BEGIN label of the current function, or NULL
207 const char * current_function_func_begin_label;
209 /* Nonzero means to collect statistics which might be expensive
210 and to print them when we are done. */
211 int flag_detailed_statistics = 0;
213 /* A random sequence of characters, unless overridden by user. */
214 static const char *flag_random_seed;
216 /* A local time stamp derived from the time of compilation. It will be
217 zero if the system cannot provide a time. It will be -1u, if the
218 user has specified a particular random seed. */
223 /* Nonzero means `char' should be signed. */
225 int flag_signed_char;
227 /* Nonzero means give an enum type only as many bytes as it needs. A value
228 of 2 means it has not yet been initialized. */
230 int flag_short_enums;
232 /* Nonzero if structures and unions should be returned in memory.
234 This should only be defined if compatibility with another compiler or
235 with an ABI is needed, because it results in slower code. */
237 #ifndef DEFAULT_PCC_STRUCT_RETURN
238 #define DEFAULT_PCC_STRUCT_RETURN 1
241 /* Nonzero for -fpcc-struct-return: return values the same way PCC does. */
243 int flag_pcc_struct_return = DEFAULT_PCC_STRUCT_RETURN;
245 /* 0 means straightforward implementation of complex divide acceptable.
246 1 means wide ranges of inputs must work for complex divide.
247 2 means C99-like requirements for complex multiply and divide. */
249 int flag_complex_method = 1;
251 /* Nonzero means we should be saving declaration info into a .X file. */
253 int flag_gen_aux_info = 0;
255 /* Specified name of aux-info file. */
257 const char *aux_info_file_name;
259 /* Nonzero if we are compiling code for a shared library, zero for
264 /* Generate code for GNU or NeXT Objective-C runtime environment. */
266 #ifdef NEXT_OBJC_RUNTIME
267 int flag_next_runtime = 1;
269 int flag_next_runtime = 0;
272 /* Set to the default thread-local storage (tls) model to use. */
274 enum tls_model flag_tls_default = TLS_MODEL_GLOBAL_DYNAMIC;
276 /* Set the default region and algorithm for the integrated register
279 enum ira_algorithm flag_ira_algorithm = IRA_ALGORITHM_CB;
280 enum ira_region flag_ira_region = IRA_REGION_MIXED;
282 /* Set the default value for -fira-verbose. */
284 unsigned int flag_ira_verbose = 5;
286 /* Set the default for excess precision. */
288 enum excess_precision flag_excess_precision_cmdline = EXCESS_PRECISION_DEFAULT;
289 enum excess_precision flag_excess_precision = EXCESS_PRECISION_DEFAULT;
291 /* Nonzero means change certain warnings into errors.
292 Usually these are warnings about failure to conform to some standard. */
294 int flag_pedantic_errors = 0;
296 /* Nonzero means make permerror produce warnings instead of errors. */
298 int flag_permissive = 0;
300 /* -dA causes debug commentary information to be produced in
301 the generated assembly code (to make it more readable). This option
302 is generally only of use to those who actually need to read the
303 generated assembly code (perhaps while debugging the compiler itself).
304 Currently, this switch is only used by dwarfout.c; however, it is intended
305 to be a catchall for printing debug information in the assembler file. */
307 int flag_debug_asm = 0;
309 /* -dP causes the rtl to be emitted as a comment in assembly. */
311 int flag_dump_rtl_in_asm = 0;
313 /* When non-NULL, indicates that whenever space is allocated on the
314 stack, the resulting stack pointer must not pass this
315 address---that is, for stacks that grow downward, the stack pointer
316 must always be greater than or equal to this address; for stacks
317 that grow upward, the stack pointer must be less than this address.
318 At present, the rtx may be either a REG or a SYMBOL_REF, although
319 the support provided depends on the backend. */
322 /* Nonzero if we should track variables. When
323 flag_var_tracking == AUTODETECT_VALUE it will be set according
324 to optimize, debug_info_level and debug_hooks in process_options (). */
325 int flag_var_tracking = AUTODETECT_VALUE;
327 /* Type of stack check. */
328 enum stack_check_type flag_stack_check = NO_STACK_CHECK;
330 /* True if the user has tagged the function with the 'section'
333 bool user_defined_section_attribute = false;
335 /* Values of the -falign-* flags: how much to align labels in code.
336 0 means `use default', 1 means `don't align'.
337 For each variable, there is an _log variant which is the power
338 of two not less than the variable, for .align output. */
341 int align_loops_max_skip;
343 int align_jumps_max_skip;
344 int align_labels_log;
345 int align_labels_max_skip;
346 int align_functions_log;
350 const char *const string;
354 lang_independent_options;
356 /* Nonzero if subexpressions must be evaluated from left-to-right. */
357 int flag_evaluation_order = 0;
359 /* The user symbol prefix after having resolved same. */
360 const char *user_label_prefix;
362 static const param_info lang_independent_params[] = {
363 #define DEFPARAM(ENUM, OPTION, HELP, DEFAULT, MIN, MAX) \
364 { OPTION, DEFAULT, false, MIN, MAX, HELP },
365 #include "params.def"
367 { NULL, 0, false, 0, 0, NULL }
370 /* Output files for assembler code (real compiler output)
371 and debugging dumps. */
375 FILE *dump_file = NULL;
376 const char *dump_file_name;
378 /* The current working directory of a translation. It's generally the
379 directory from which compilation was initiated, but a preprocessed
380 file may specify the original directory in which it was
383 static const char *src_pwd;
385 /* Initialize src_pwd with the given string, and return true. If it
386 was already initialized, return false. As a special case, it may
387 be called with a NULL argument to test whether src_pwd has NOT been
391 set_src_pwd (const char *pwd)
395 if (strcmp (src_pwd, pwd) == 0)
401 src_pwd = xstrdup (pwd);
405 /* Return the directory from which the translation unit was initiated,
406 in case set_src_pwd() was not called before to assign it a
422 /* Called when the start of a function definition is parsed,
423 this function prints on stderr the name of the function. */
425 announce_function (tree decl)
429 if (rtl_dump_and_exit)
430 fprintf (stderr, "%s ", IDENTIFIER_POINTER (DECL_NAME (decl)));
432 fprintf (stderr, " %s", lang_hooks.decl_printable_name (decl, 2));
434 pp_needs_newline (global_dc->printer) = true;
435 diagnostic_set_last_function (global_dc, (diagnostic_info *) NULL);
439 /* Initialize local_tick with the time of day, or -1 if
440 flag_random_seed is set. */
443 init_local_tick (void)
445 if (!flag_random_seed)
447 /* Get some more or less random data. */
448 #ifdef HAVE_GETTIMEOFDAY
452 gettimeofday (&tv, NULL);
453 local_tick = tv.tv_sec * 1000 + tv.tv_usec / 1000;
457 time_t now = time (NULL);
459 if (now != (time_t)-1)
460 local_tick = (unsigned) now;
468 /* Set up a default flag_random_seed and local_tick, unless the user
469 already specified one. Must be called after init_local_tick. */
472 init_random_seed (void)
474 unsigned HOST_WIDE_INT value;
475 static char random_seed[HOST_BITS_PER_WIDE_INT / 4 + 3];
477 value = local_tick ^ getpid ();
479 sprintf (random_seed, HOST_WIDE_INT_PRINT_HEX, value);
480 flag_random_seed = random_seed;
483 /* Obtain the random_seed string. Unless NOINIT, initialize it if
484 it's not provided in the command line. */
487 get_random_seed (bool noinit)
489 if (!flag_random_seed && !noinit)
491 return flag_random_seed;
494 /* Modify the random_seed string to VAL. Return its previous
498 set_random_seed (const char *val)
500 const char *old = flag_random_seed;
501 flag_random_seed = val;
505 /* Decode the string P as an integral parameter.
506 If the string is indeed an integer return its numeric value else
507 issue an Invalid Option error for the option PNAME and return DEFVAL.
508 If PNAME is zero just return DEFVAL, do not call error. */
511 read_integral_parameter (const char *p, const char *pname, const int defval)
513 const char *endp = p;
526 error ("invalid option argument %qs", pname);
533 /* When compiling with a recent enough GCC, we use the GNU C "extern inline"
534 for floor_log2 and exact_log2; see toplev.h. That construct, however,
535 conflicts with the ISO C++ One Definition Rule. */
537 #if GCC_VERSION < 3004 || !defined (__cplusplus)
539 /* Given X, an unsigned number, return the largest int Y such that 2**Y <= X.
540 If X is 0, return -1. */
543 floor_log2 (unsigned HOST_WIDE_INT x)
551 t = HOST_BITS_PER_WIDE_INT - 1 - (int) CLZ_HWI (x);
553 if (HOST_BITS_PER_WIDE_INT > 64)
554 if (x >= (unsigned HOST_WIDE_INT) 1 << (t + 64))
556 if (HOST_BITS_PER_WIDE_INT > 32)
557 if (x >= ((unsigned HOST_WIDE_INT) 1) << (t + 32))
559 if (x >= ((unsigned HOST_WIDE_INT) 1) << (t + 16))
561 if (x >= ((unsigned HOST_WIDE_INT) 1) << (t + 8))
563 if (x >= ((unsigned HOST_WIDE_INT) 1) << (t + 4))
565 if (x >= ((unsigned HOST_WIDE_INT) 1) << (t + 2))
567 if (x >= ((unsigned HOST_WIDE_INT) 1) << (t + 1))
574 /* Return the logarithm of X, base 2, considering X unsigned,
575 if X is a power of 2. Otherwise, returns -1. */
578 exact_log2 (unsigned HOST_WIDE_INT x)
583 return x ? CTZ_HWI (x) : -1;
585 return floor_log2 (x);
589 #endif /* GCC_VERSION < 3004 || !defined (__cplusplus) */
591 /* Handler for fatal signals, such as SIGSEGV. These are transformed
592 into ICE messages, which is much more user friendly. In case the
593 error printer crashes, reset the signal to prevent infinite recursion. */
596 crash_signal (int signo)
598 signal (signo, SIG_DFL);
600 /* If we crashed while processing an ASM statement, then be a little more
601 graceful. It's most likely the user's fault. */
602 if (this_is_asm_operands)
604 output_operand_lossage ("unrecoverable error");
605 exit (FATAL_EXIT_CODE);
608 internal_error ("%s", strsignal (signo));
611 /* Arrange to dump core on error. (The regular error message is still
612 printed first, except in the case of abort().) */
615 setup_core_dumping (void)
618 signal (SIGABRT, SIG_DFL);
620 #if defined(HAVE_SETRLIMIT)
623 if (getrlimit (RLIMIT_CORE, &rlim) != 0)
624 fatal_error ("getting core file size maximum limit: %m");
625 rlim.rlim_cur = rlim.rlim_max;
626 if (setrlimit (RLIMIT_CORE, &rlim) != 0)
627 fatal_error ("setting core file size limit to maximum: %m");
630 diagnostic_abort_on_error (global_dc);
634 /* Strip off a legitimate source ending from the input string NAME of
635 length LEN. Rather than having to know the names used by all of
636 our front ends, we strip off an ending of a period followed by
637 up to five characters. (Java uses ".class".) */
640 strip_off_ending (char *name, int len)
643 for (i = 2; i < 6 && len > i; i++)
645 if (name[len - i] == '.')
647 name[len - i] = '\0';
653 /* Output a quoted string. */
656 output_quoted_string (FILE *asm_file, const char *string)
658 #ifdef OUTPUT_QUOTED_STRING
659 OUTPUT_QUOTED_STRING (asm_file, string);
663 putc ('\"', asm_file);
664 while ((c = *string++) != 0)
668 if (c == '\"' || c == '\\')
669 putc ('\\', asm_file);
673 fprintf (asm_file, "\\%03o", (unsigned char) c);
675 putc ('\"', asm_file);
679 /* Output a file name in the form wanted by System V. */
682 output_file_directive (FILE *asm_file, const char *input_name)
687 if (input_name == NULL)
688 input_name = "<stdin>";
690 input_name = remap_debug_filename (input_name);
692 len = strlen (input_name);
693 na = input_name + len;
695 /* NA gets INPUT_NAME sans directory names. */
696 while (na > input_name)
698 if (IS_DIR_SEPARATOR (na[-1]))
703 #ifdef ASM_OUTPUT_SOURCE_FILENAME
704 ASM_OUTPUT_SOURCE_FILENAME (asm_file, na);
706 fprintf (asm_file, "\t.file\t");
707 output_quoted_string (asm_file, na);
708 fputc ('\n', asm_file);
712 /* A subroutine of wrapup_global_declarations. We've come to the end of
713 the compilation unit. All deferred variables should be undeferred,
714 and all incomplete decls should be finalized. */
717 wrapup_global_declaration_1 (tree decl)
719 /* We're not deferring this any longer. Assignment is conditional to
720 avoid needlessly dirtying PCH pages. */
721 if (CODE_CONTAINS_STRUCT (TREE_CODE (decl), TS_DECL_WITH_VIS)
722 && DECL_DEFER_OUTPUT (decl) != 0)
723 DECL_DEFER_OUTPUT (decl) = 0;
725 if (TREE_CODE (decl) == VAR_DECL && DECL_SIZE (decl) == 0)
726 lang_hooks.finish_incomplete_decl (decl);
729 /* A subroutine of wrapup_global_declarations. Decide whether or not DECL
730 needs to be output. Return true if it is output. */
733 wrapup_global_declaration_2 (tree decl)
735 if (TREE_ASM_WRITTEN (decl) || DECL_EXTERNAL (decl))
738 /* Don't write out static consts, unless we still need them.
740 We also keep static consts if not optimizing (for debugging),
741 unless the user specified -fno-keep-static-consts.
742 ??? They might be better written into the debug information.
743 This is possible when using DWARF.
745 A language processor that wants static constants to be always
746 written out (even if it is not used) is responsible for
747 calling rest_of_decl_compilation itself. E.g. the C front-end
748 calls rest_of_decl_compilation from finish_decl.
749 One motivation for this is that is conventional in some
750 environments to write things like:
751 static const char rcsid[] = "... version string ...";
752 intending to force the string to be in the executable.
754 A language processor that would prefer to have unneeded
755 static constants "optimized away" would just defer writing
756 them out until here. E.g. C++ does this, because static
757 constants are often defined in header files.
759 ??? A tempting alternative (for both C and C++) would be
760 to force a constant to be written if and only if it is
761 defined in a main file, as opposed to an include file. */
763 if (TREE_CODE (decl) == VAR_DECL && TREE_STATIC (decl))
765 struct varpool_node *node;
767 node = varpool_node (decl);
771 else if (node->alias)
773 else if (!cgraph_global_info_ready
775 || TREE_USED (DECL_ASSEMBLER_NAME (decl))))
777 else if (node->needed)
779 else if (DECL_COMDAT (decl))
781 else if (TREE_READONLY (decl) && !TREE_PUBLIC (decl)
782 && (optimize || !flag_keep_static_consts
783 || DECL_ARTIFICIAL (decl)))
788 rest_of_decl_compilation (decl, 1, 1);
796 /* Do any final processing required for the declarations in VEC, of
797 which there are LEN. We write out inline functions and variables
798 that have been deferred until this point, but which are required.
799 Returns nonzero if anything was put out. */
802 wrapup_global_declarations (tree *vec, int len)
804 bool reconsider, output_something = false;
807 for (i = 0; i < len; i++)
808 wrapup_global_declaration_1 (vec[i]);
810 /* Now emit any global variables or functions that we have been
811 putting off. We need to loop in case one of the things emitted
812 here references another one which comes earlier in the list. */
816 for (i = 0; i < len; i++)
817 reconsider |= wrapup_global_declaration_2 (vec[i]);
819 output_something = true;
823 return output_something;
826 /* A subroutine of check_global_declarations. Issue appropriate warnings
827 for the global declaration DECL. */
830 check_global_declaration_1 (tree decl)
832 /* Warn about any function declared static but not defined. We don't
833 warn about variables, because many programs have static variables
834 that exist only to get some text into the object file. */
835 if (TREE_CODE (decl) == FUNCTION_DECL
836 && DECL_INITIAL (decl) == 0
837 && DECL_EXTERNAL (decl)
838 && ! DECL_ARTIFICIAL (decl)
839 && ! TREE_NO_WARNING (decl)
840 && ! TREE_PUBLIC (decl)
841 && (warn_unused_function
842 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl))))
844 if (TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl)))
845 pedwarn (input_location, 0, "%q+F used but never defined", decl);
847 warning (OPT_Wunused_function, "%q+F declared %<static%> but never defined", decl);
848 /* This symbol is effectively an "extern" declaration now. */
849 TREE_PUBLIC (decl) = 1;
850 assemble_external (decl);
853 /* Warn about static fns or vars defined but not used. */
854 if (((warn_unused_function && TREE_CODE (decl) == FUNCTION_DECL)
855 /* We don't warn about "static const" variables because the
856 "rcs_id" idiom uses that construction. */
857 || (warn_unused_variable
858 && TREE_CODE (decl) == VAR_DECL && ! TREE_READONLY (decl)))
859 && ! DECL_IN_SYSTEM_HEADER (decl)
860 && ! TREE_USED (decl)
861 /* The TREE_USED bit for file-scope decls is kept in the identifier,
862 to handle multiple external decls in different scopes. */
863 && ! (DECL_NAME (decl) && TREE_USED (DECL_NAME (decl)))
864 && ! DECL_EXTERNAL (decl)
865 && ! TREE_PUBLIC (decl)
866 /* A volatile variable might be used in some non-obvious way. */
867 && ! TREE_THIS_VOLATILE (decl)
868 /* Global register variables must be declared to reserve them. */
869 && ! (TREE_CODE (decl) == VAR_DECL && DECL_REGISTER (decl))
870 /* Otherwise, ask the language. */
871 && lang_hooks.decls.warn_unused_global (decl))
872 warning ((TREE_CODE (decl) == FUNCTION_DECL)
873 ? OPT_Wunused_function
874 : OPT_Wunused_variable,
875 "%q+D defined but not used", decl);
878 /* Issue appropriate warnings for the global declarations in VEC (of
879 which there are LEN). */
882 check_global_declarations (tree *vec, int len)
886 for (i = 0; i < len; i++)
887 check_global_declaration_1 (vec[i]);
890 /* Emit debugging information for all global declarations in VEC. */
893 emit_debug_global_declarations (tree *vec, int len)
897 /* Avoid confusing the debug information machinery when there are errors. */
898 if (errorcount != 0 || sorrycount != 0)
901 timevar_push (TV_SYMOUT);
902 for (i = 0; i < len; i++)
903 debug_hooks->global_decl (vec[i]);
904 timevar_pop (TV_SYMOUT);
907 /* Warn about a use of an identifier which was marked deprecated. */
909 warn_deprecated_use (tree node)
911 if (node == 0 || !warn_deprecated_decl)
916 expanded_location xloc = expand_location (DECL_SOURCE_LOCATION (node));
917 warning (OPT_Wdeprecated_declarations,
918 "%qD is deprecated (declared at %s:%d)",
919 node, xloc.file, xloc.line);
921 else if (TYPE_P (node))
923 const char *what = NULL;
924 tree decl = TYPE_STUB_DECL (node);
926 if (TYPE_NAME (node))
928 if (TREE_CODE (TYPE_NAME (node)) == IDENTIFIER_NODE)
929 what = IDENTIFIER_POINTER (TYPE_NAME (node));
930 else if (TREE_CODE (TYPE_NAME (node)) == TYPE_DECL
931 && DECL_NAME (TYPE_NAME (node)))
932 what = IDENTIFIER_POINTER (DECL_NAME (TYPE_NAME (node)));
937 expanded_location xloc
938 = expand_location (DECL_SOURCE_LOCATION (decl));
940 warning (OPT_Wdeprecated_declarations,
941 "%qs is deprecated (declared at %s:%d)", what,
942 xloc.file, xloc.line);
944 warning (OPT_Wdeprecated_declarations,
945 "type is deprecated (declared at %s:%d)",
946 xloc.file, xloc.line);
951 warning (OPT_Wdeprecated_declarations, "%qs is deprecated", what);
953 warning (OPT_Wdeprecated_declarations, "type is deprecated");
958 /* Compile an entire translation unit. Write a file of assembly
959 output and various debugging dumps. */
964 /* Initialize yet another pass. */
966 ggc_protect_identifiers = true;
969 init_final (main_input_filename);
970 coverage_init (aux_base_name);
973 timevar_push (TV_PARSE);
975 /* Call the parser, which parses the entire file (calling
976 rest_of_compilation for each function). */
977 lang_hooks.parse_file (set_yydebug);
979 /* Compilation is now finished except for writing
980 what's left of the symbol table output. */
981 timevar_pop (TV_PARSE);
983 if (flag_syntax_only)
986 ggc_protect_identifiers = false;
988 lang_hooks.decls.final_write_globals ();
990 if (errorcount || sorrycount)
993 varpool_assemble_pending_decls ();
996 /* This must occur after the loop to output deferred functions.
997 Else the coverage initializer would not be emitted if all the
998 functions in this compilation unit were deferred. */
1001 /* Likewise for mudflap static object registrations. */
1003 mudflap_finish_file ();
1005 /* Likewise for emulated thread-local storage. */
1006 if (!targetm.have_tls)
1009 output_shared_constant_pool ();
1010 output_object_blocks ();
1012 /* Write out any pending weak symbol declarations. */
1015 /* Do dbx symbols. */
1016 timevar_push (TV_SYMOUT);
1018 #if defined DWARF2_DEBUGGING_INFO || defined DWARF2_UNWIND_INFO
1019 if (dwarf2out_do_frame ())
1020 dwarf2out_frame_finish ();
1023 (*debug_hooks->finish) (main_input_filename);
1024 timevar_pop (TV_SYMOUT);
1026 /* Output some stuff at end of file if nec. */
1028 dw2_output_indirect_constants ();
1030 /* Flush any pending external directives. */
1031 process_pending_assemble_externals ();
1033 /* Attach a special .ident directive to the end of the file to identify
1034 the version of GCC which compiled this code. The format of the .ident
1035 string is patterned after the ones produced by native SVR4 compilers. */
1039 const char *pkg_version = "(GNU) ";
1041 if (strcmp ("(GCC) ", pkgversion_string))
1042 pkg_version = pkgversion_string;
1043 fprintf (asm_out_file, "%s\"GCC: %s%s\"\n",
1044 IDENT_ASM_OP, pkg_version, version_string);
1048 /* This must be at the end. Some target ports emit end of file directives
1049 into the assembly file here, and hence we can not output anything to the
1050 assembly file after this point. */
1051 targetm.asm_out.file_end ();
1054 /* Parse a -d... command line switch. */
1057 decode_d_option (const char *arg)
1068 flag_print_asm_name = 1;
1071 flag_dump_rtl_in_asm = 1;
1072 flag_print_asm_name = 1;
1075 graph_dump_format = vcg;
1078 rtl_dump_and_exit = 1;
1083 case 'D': /* These are handled by the preprocessor. */
1090 setup_core_dumping();
1093 enable_rtl_dump_file ();
1097 warning (0, "unrecognized gcc debugging option: %c", c);
1102 /* Indexed by enum debug_info_type. */
1103 const char *const debug_type_names[] =
1105 "none", "stabs", "coff", "dwarf-2", "xcoff", "vms"
1108 /* Print version information to FILE.
1109 Each line begins with INDENT (for the case where FILE is the
1110 assembler output file). */
1113 print_version (FILE *file, const char *indent)
1115 static const char fmt1[] =
1117 N_("%s%s%s %sversion %s (%s)\n%s\tcompiled by GNU C version %s, ")
1119 N_("%s%s%s %sversion %s (%s) compiled by CC, ")
1122 static const char fmt2[] =
1123 N_("GMP version %s, MPFR version %s.\n");
1124 static const char fmt3[] =
1125 N_("%s%swarning: %s header version %s differs from library version %s.\n");
1126 static const char fmt4[] =
1127 N_("%s%sGGC heuristics: --param ggc-min-expand=%d --param ggc-min-heapsize=%d\n");
1129 #define __VERSION__ "[?]"
1132 file == stderr ? _(fmt1) : fmt1,
1133 indent, *indent != 0 ? " " : "",
1134 lang_hooks.name, pkgversion_string, version_string, TARGET_NAME,
1135 indent, __VERSION__);
1137 /* We need to stringify the GMP macro values. Ugh, gmp_version has
1138 two string formats, "i.j.k" and "i.j" when k is zero. */
1139 #define GCC_GMP_STRINGIFY_VERSION3(X) #X
1140 #define GCC_GMP_STRINGIFY_VERSION2(X) GCC_GMP_STRINGIFY_VERSION3(X)
1141 #if __GNU_MP_VERSION_PATCHLEVEL == 0
1142 #define GCC_GMP_STRINGIFY_VERSION GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION) "." \
1143 GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION_MINOR)
1145 #define GCC_GMP_STRINGIFY_VERSION GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION) "." \
1146 GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION_MINOR) "." \
1147 GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION_PATCHLEVEL)
1150 file == stderr ? _(fmt2) : fmt2,
1151 GCC_GMP_STRINGIFY_VERSION, MPFR_VERSION_STRING);
1152 if (strcmp (GCC_GMP_STRINGIFY_VERSION, gmp_version))
1154 file == stderr ? _(fmt3) : fmt3,
1155 indent, *indent != 0 ? " " : "",
1156 "GMP", GCC_GMP_STRINGIFY_VERSION, gmp_version);
1157 if (strcmp (MPFR_VERSION_STRING, mpfr_get_version ()))
1159 file == stderr ? _(fmt3) : fmt3,
1160 indent, *indent != 0 ? " " : "",
1161 "MPFR", MPFR_VERSION_STRING, mpfr_get_version ());
1163 file == stderr ? _(fmt4) : fmt4,
1164 indent, *indent != 0 ? " " : "",
1165 PARAM_VALUE (GGC_MIN_EXPAND), PARAM_VALUE (GGC_MIN_HEAPSIZE));
1167 print_plugins_versions (file, indent);
1170 #ifdef ASM_COMMENT_START
1172 print_to_asm_out_file (print_switch_type type, const char * text)
1174 bool prepend_sep = true;
1178 case SWITCH_TYPE_LINE_END:
1179 putc ('\n', asm_out_file);
1182 case SWITCH_TYPE_LINE_START:
1183 fputs (ASM_COMMENT_START, asm_out_file);
1184 return strlen (ASM_COMMENT_START);
1186 case SWITCH_TYPE_DESCRIPTIVE:
1187 if (ASM_COMMENT_START[0] == 0)
1188 prepend_sep = false;
1190 case SWITCH_TYPE_PASSED:
1191 case SWITCH_TYPE_ENABLED:
1193 fputc (' ', asm_out_file);
1194 fprintf (asm_out_file, text);
1195 /* No need to return the length here as
1196 print_single_switch has already done it. */
1206 print_to_stderr (print_switch_type type, const char * text)
1210 case SWITCH_TYPE_LINE_END:
1211 putc ('\n', stderr);
1214 case SWITCH_TYPE_LINE_START:
1217 case SWITCH_TYPE_PASSED:
1218 case SWITCH_TYPE_ENABLED:
1219 fputc (' ', stderr);
1222 case SWITCH_TYPE_DESCRIPTIVE:
1223 fprintf (stderr, text);
1224 /* No need to return the length here as
1225 print_single_switch has already done it. */
1233 /* Print an option value and return the adjusted position in the line.
1234 ??? print_fn doesn't handle errors, eg disk full; presumably other
1235 code will catch a disk full though. */
1238 print_single_switch (print_switch_fn_type print_fn,
1240 print_switch_type type,
1243 /* The ultrix fprintf returns 0 on success, so compute the result
1244 we want here since we need it for the following test. The +1
1245 is for the separator character that will probably be emitted. */
1246 int len = strlen (text) + 1;
1249 && pos + len > MAX_LINE)
1251 print_fn (SWITCH_TYPE_LINE_END, NULL);
1256 pos += print_fn (SWITCH_TYPE_LINE_START, NULL);
1258 print_fn (type, text);
1262 /* Print active target switches using PRINT_FN.
1263 POS is the current cursor position and MAX is the size of a "line".
1264 Each line begins with INDENT and ends with TERM.
1265 Each switch is separated from the next by SEP. */
1268 print_switch_values (print_switch_fn_type print_fn)
1274 /* Fill in the -frandom-seed option, if the user didn't pass it, so
1275 that it can be printed below. This helps reproducibility. */
1276 if (!flag_random_seed)
1277 init_random_seed ();
1279 /* Print the options as passed. */
1280 pos = print_single_switch (print_fn, pos,
1281 SWITCH_TYPE_DESCRIPTIVE, _("options passed: "));
1283 for (p = &save_argv[1]; *p != NULL; p++)
1288 if (strcmp (*p, "-o") == 0
1289 || strcmp (*p, "-dumpbase") == 0
1290 || strcmp (*p, "-auxbase") == 0)
1297 if (strcmp (*p, "-quiet") == 0
1298 || strcmp (*p, "-version") == 0)
1305 pos = print_single_switch (print_fn, pos, SWITCH_TYPE_PASSED, *p);
1309 print_fn (SWITCH_TYPE_LINE_END, NULL);
1311 /* Print the -f and -m options that have been enabled.
1312 We don't handle language specific options but printing argv
1314 pos = print_single_switch (print_fn, 0,
1315 SWITCH_TYPE_DESCRIPTIVE, _("options enabled: "));
1317 for (j = 0; j < cl_options_count; j++)
1318 if ((cl_options[j].flags & CL_REPORT)
1319 && option_enabled (j) > 0)
1320 pos = print_single_switch (print_fn, pos,
1321 SWITCH_TYPE_ENABLED, cl_options[j].opt_text);
1323 print_fn (SWITCH_TYPE_LINE_END, NULL);
1326 /* Open assembly code output file. Do this even if -fsyntax-only is
1327 on, because then the driver will have provided the name of a
1328 temporary file or bit bucket for us. NAME is the file specified on
1329 the command line, possibly NULL. */
1331 init_asm_output (const char *name)
1333 if (name == NULL && asm_file_name == 0)
1334 asm_out_file = stdout;
1337 if (asm_file_name == 0)
1339 int len = strlen (dump_base_name);
1340 char *dumpname = XNEWVEC (char, len + 6);
1342 memcpy (dumpname, dump_base_name, len + 1);
1343 strip_off_ending (dumpname, len);
1344 strcat (dumpname, ".s");
1345 asm_file_name = dumpname;
1347 if (!strcmp (asm_file_name, "-"))
1348 asm_out_file = stdout;
1350 asm_out_file = fopen (asm_file_name, "w+b");
1351 if (asm_out_file == 0)
1352 fatal_error ("can%'t open %s for writing: %m", asm_file_name);
1355 if (!flag_syntax_only)
1357 targetm.asm_out.file_start ();
1359 if (flag_record_gcc_switches)
1361 if (targetm.asm_out.record_gcc_switches)
1363 /* Let the target know that we are about to start recording. */
1364 targetm.asm_out.record_gcc_switches (SWITCH_TYPE_DESCRIPTIVE,
1366 /* Now record the switches. */
1367 print_switch_values (targetm.asm_out.record_gcc_switches);
1368 /* Let the target know that the recording is over. */
1369 targetm.asm_out.record_gcc_switches (SWITCH_TYPE_DESCRIPTIVE,
1373 inform (input_location, "-frecord-gcc-switches is not supported by the current target");
1376 #ifdef ASM_COMMENT_START
1377 if (flag_verbose_asm)
1379 /* Print the list of switches in effect
1380 into the assembler file as comments. */
1381 print_version (asm_out_file, ASM_COMMENT_START);
1382 print_switch_values (print_to_asm_out_file);
1383 fprintf (asm_out_file, "\n");
1389 /* Return true if the state of option OPTION should be stored in PCH files
1390 and checked by default_pch_valid_p. Store the option's current state
1394 option_affects_pch_p (int option, struct cl_option_state *state)
1396 if ((cl_options[option].flags & CL_TARGET) == 0)
1398 if (cl_options[option].flag_var == &target_flags)
1399 if (targetm.check_pch_target_flags)
1401 return get_option_state (option, state);
1404 /* Default version of get_pch_validity.
1405 By default, every flag difference is fatal; that will be mostly right for
1406 most targets, but completely right for very few. */
1409 default_get_pch_validity (size_t *len)
1411 struct cl_option_state state;
1416 if (targetm.check_pch_target_flags)
1417 *len += sizeof (target_flags);
1418 for (i = 0; i < cl_options_count; i++)
1419 if (option_affects_pch_p (i, &state))
1422 result = r = XNEWVEC (char, *len);
1426 if (targetm.check_pch_target_flags)
1428 memcpy (r, &target_flags, sizeof (target_flags));
1429 r += sizeof (target_flags);
1432 for (i = 0; i < cl_options_count; i++)
1433 if (option_affects_pch_p (i, &state))
1435 memcpy (r, state.data, state.size);
1442 /* Return a message which says that a PCH file was created with a different
1443 setting of OPTION. */
1446 pch_option_mismatch (const char *option)
1450 asprintf (&r, _("created and used with differing settings of '%s'"), option);
1452 return _("out of memory");
1456 /* Default version of pch_valid_p. */
1459 default_pch_valid_p (const void *data_p, size_t len)
1461 struct cl_option_state state;
1462 const char *data = (const char *)data_p;
1465 /* -fpic and -fpie also usually make a PCH invalid. */
1466 if (data[0] != flag_pic)
1467 return _("created and used with different settings of -fpic");
1468 if (data[1] != flag_pie)
1469 return _("created and used with different settings of -fpie");
1472 /* Check target_flags. */
1473 if (targetm.check_pch_target_flags)
1478 memcpy (&tf, data, sizeof (target_flags));
1479 data += sizeof (target_flags);
1480 len -= sizeof (target_flags);
1481 r = targetm.check_pch_target_flags (tf);
1486 for (i = 0; i < cl_options_count; i++)
1487 if (option_affects_pch_p (i, &state))
1489 if (memcmp (data, state.data, state.size) != 0)
1490 return pch_option_mismatch (cl_options[i].opt_text);
1498 /* Default tree printer. Handles declarations only. */
1500 default_tree_printer (pretty_printer * pp, text_info *text, const char *spec,
1501 int precision, bool wide, bool set_locus, bool hash)
1505 /* FUTURE: %+x should set the locus. */
1506 if (precision != 0 || wide || hash)
1512 t = va_arg (*text->args_ptr, tree);
1513 if (TREE_CODE (t) == IDENTIFIER_NODE)
1515 pp_string (pp, IDENTIFIER_POINTER (t));
1521 t = va_arg (*text->args_ptr, tree);
1522 if (DECL_DEBUG_EXPR_IS_FROM (t) && DECL_DEBUG_EXPR (t))
1523 t = DECL_DEBUG_EXPR (t);
1528 t = va_arg (*text->args_ptr, tree);
1535 if (set_locus && text->locus)
1536 *text->locus = DECL_SOURCE_LOCATION (t);
1540 const char *n = DECL_NAME (t)
1541 ? lang_hooks.decl_printable_name (t, 2)
1546 dump_generic_node (pp, t, 0, TDF_DIAGNOSTIC, 0);
1551 /* A helper function; used as the reallocator function for cpp's line
1554 realloc_for_line_map (void *ptr, size_t len)
1556 return ggc_realloc (ptr, len);
1559 /* Initialization of the front end environment, before command line
1560 options are parsed. Signal handlers, internationalization etc.
1561 ARGV0 is main's argv[0]. */
1563 general_init (const char *argv0)
1567 p = argv0 + strlen (argv0);
1568 while (p != argv0 && !IS_DIR_SEPARATOR (p[-1]))
1572 xmalloc_set_program_name (progname);
1576 /* Unlock the stdio streams. */
1577 unlock_std_streams ();
1579 gcc_init_libintl ();
1581 /* Initialize the diagnostics reporting machinery, so option parsing
1582 can give warnings and errors. */
1583 diagnostic_initialize (global_dc);
1584 /* Set a default printer. Language specific initializations will
1585 override it later. */
1586 pp_format_decoder (global_dc->printer) = &default_tree_printer;
1588 /* Trap fatal signals, e.g. SIGSEGV, and convert them to ICE messages. */
1590 signal (SIGSEGV, crash_signal);
1593 signal (SIGILL, crash_signal);
1596 signal (SIGBUS, crash_signal);
1599 signal (SIGABRT, crash_signal);
1601 #if defined SIGIOT && (!defined SIGABRT || SIGABRT != SIGIOT)
1602 signal (SIGIOT, crash_signal);
1605 signal (SIGFPE, crash_signal);
1608 /* Other host-specific signal setup. */
1609 (*host_hooks.extra_signals)();
1611 /* Initialize the garbage-collector, string pools and tree type hash
1615 line_table = GGC_NEW (struct line_maps);
1616 linemap_init (line_table);
1617 line_table->reallocator = realloc_for_line_map;
1620 /* Initialize register usage now so switches may override. */
1623 /* Register the language-independent parameters. */
1624 add_params (lang_independent_params, LAST_PARAM);
1626 /* This must be done after add_params but before argument processing. */
1627 init_ggc_heuristics();
1628 init_optimization_passes ();
1629 statistics_early_init ();
1632 /* Return true if the current target supports -fsection-anchors. */
1635 target_supports_section_anchors_p (void)
1637 if (targetm.min_anchor_offset == 0 && targetm.max_anchor_offset == 0)
1640 if (targetm.asm_out.output_anchor == NULL)
1646 /* Default the align_* variables to 1 if they're still unset, and
1647 set up the align_*_log variables. */
1649 init_alignments (void)
1651 if (align_loops <= 0)
1653 if (align_loops_max_skip > align_loops)
1654 align_loops_max_skip = align_loops - 1;
1655 align_loops_log = floor_log2 (align_loops * 2 - 1);
1656 if (align_jumps <= 0)
1658 if (align_jumps_max_skip > align_jumps)
1659 align_jumps_max_skip = align_jumps - 1;
1660 align_jumps_log = floor_log2 (align_jumps * 2 - 1);
1661 if (align_labels <= 0)
1663 align_labels_log = floor_log2 (align_labels * 2 - 1);
1664 if (align_labels_max_skip > align_labels)
1665 align_labels_max_skip = align_labels - 1;
1666 if (align_functions <= 0)
1667 align_functions = 1;
1668 align_functions_log = floor_log2 (align_functions * 2 - 1);
1671 /* Process the options that have been parsed. */
1673 process_options (void)
1675 /* Just in case lang_hooks.post_options ends up calling a debug_hook.
1676 This can happen with incorrect pre-processed input. */
1677 debug_hooks = &do_nothing_debug_hooks;
1679 /* This replaces set_Wunused. */
1680 if (warn_unused_function == -1)
1681 warn_unused_function = warn_unused;
1682 if (warn_unused_label == -1)
1683 warn_unused_label = warn_unused;
1684 /* Wunused-parameter is enabled if both -Wunused -Wextra are enabled. */
1685 if (warn_unused_parameter == -1)
1686 warn_unused_parameter = (warn_unused && extra_warnings);
1687 if (warn_unused_variable == -1)
1688 warn_unused_variable = warn_unused;
1689 if (warn_unused_value == -1)
1690 warn_unused_value = warn_unused;
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);
1698 #ifdef OVERRIDE_OPTIONS
1699 /* Some machines may reject certain combinations of options. */
1703 if (flag_section_anchors && !target_supports_section_anchors_p ())
1705 warning (OPT_fsection_anchors,
1706 "this target does not support %qs", "-fsection-anchors");
1707 flag_section_anchors = 0;
1710 if (flag_short_enums == 2)
1711 flag_short_enums = targetm.default_short_enums ();
1713 /* Set aux_base_name if not already set. */
1716 else if (main_input_filename)
1718 char *name = xstrdup (lbasename (main_input_filename));
1720 strip_off_ending (name, strlen (name));
1721 aux_base_name = name;
1724 aux_base_name = "gccaux";
1729 || flag_loop_interchange
1730 || flag_loop_strip_mine
1731 || flag_graphite_identity)
1732 sorry ("Graphite loop optimizations cannot be used");
1735 /* Unrolling all loops implies that standard loop unrolling must also
1737 if (flag_unroll_all_loops)
1738 flag_unroll_loops = 1;
1740 /* The loop unrolling code assumes that cse will be run after loop.
1741 web and rename-registers also help when run after loop unrolling. */
1743 if (flag_rerun_cse_after_loop == AUTODETECT_VALUE)
1744 flag_rerun_cse_after_loop = flag_unroll_loops || flag_peel_loops;
1745 if (flag_web == AUTODETECT_VALUE)
1746 flag_web = flag_unroll_loops || flag_peel_loops;
1747 if (flag_rename_registers == AUTODETECT_VALUE)
1748 flag_rename_registers = flag_unroll_loops || flag_peel_loops;
1750 if (flag_non_call_exceptions)
1751 flag_asynchronous_unwind_tables = 1;
1752 if (flag_asynchronous_unwind_tables)
1753 flag_unwind_tables = 1;
1755 if (flag_value_profile_transformations)
1756 flag_profile_values = 1;
1758 /* Warn about options that are not supported on this machine. */
1759 #ifndef INSN_SCHEDULING
1760 if (flag_schedule_insns || flag_schedule_insns_after_reload)
1761 warning (0, "instruction scheduling not supported on this target machine");
1764 if (flag_delayed_branch)
1765 warning (0, "this target machine does not have delayed branches");
1768 user_label_prefix = USER_LABEL_PREFIX;
1769 if (flag_leading_underscore != -1)
1771 /* If the default prefix is more complicated than "" or "_",
1772 issue a warning and ignore this option. */
1773 if (user_label_prefix[0] == 0 ||
1774 (user_label_prefix[0] == '_' && user_label_prefix[1] == 0))
1776 user_label_prefix = flag_leading_underscore ? "_" : "";
1779 warning (0, "-f%sleading-underscore not supported on this target machine",
1780 flag_leading_underscore ? "" : "no-");
1783 /* If we are in verbose mode, write out the version and maybe all the
1784 option flags in use. */
1787 print_version (stderr, "");
1789 print_switch_values (print_to_stderr);
1792 if (flag_syntax_only)
1794 write_symbols = NO_DEBUG;
1798 /* A lot of code assumes write_symbols == NO_DEBUG if the debugging
1800 if (debug_info_level == DINFO_LEVEL_NONE)
1801 write_symbols = NO_DEBUG;
1803 /* Now we know write_symbols, set up the debug hooks based on it.
1804 By default we do nothing for debug output. */
1805 if (PREFERRED_DEBUGGING_TYPE == NO_DEBUG)
1806 default_debug_hooks = &do_nothing_debug_hooks;
1807 #if defined(DBX_DEBUGGING_INFO)
1808 else if (PREFERRED_DEBUGGING_TYPE == DBX_DEBUG)
1809 default_debug_hooks = &dbx_debug_hooks;
1811 #if defined(XCOFF_DEBUGGING_INFO)
1812 else if (PREFERRED_DEBUGGING_TYPE == XCOFF_DEBUG)
1813 default_debug_hooks = &xcoff_debug_hooks;
1815 #ifdef SDB_DEBUGGING_INFO
1816 else if (PREFERRED_DEBUGGING_TYPE == SDB_DEBUG)
1817 default_debug_hooks = &sdb_debug_hooks;
1819 #ifdef DWARF2_DEBUGGING_INFO
1820 else if (PREFERRED_DEBUGGING_TYPE == DWARF2_DEBUG)
1821 default_debug_hooks = &dwarf2_debug_hooks;
1823 #ifdef VMS_DEBUGGING_INFO
1824 else if (PREFERRED_DEBUGGING_TYPE == VMS_DEBUG
1825 || PREFERRED_DEBUGGING_TYPE == VMS_AND_DWARF2_DEBUG)
1826 default_debug_hooks = &vmsdbg_debug_hooks;
1829 if (write_symbols == NO_DEBUG)
1831 #if defined(DBX_DEBUGGING_INFO)
1832 else if (write_symbols == DBX_DEBUG)
1833 debug_hooks = &dbx_debug_hooks;
1835 #if defined(XCOFF_DEBUGGING_INFO)
1836 else if (write_symbols == XCOFF_DEBUG)
1837 debug_hooks = &xcoff_debug_hooks;
1839 #ifdef SDB_DEBUGGING_INFO
1840 else if (write_symbols == SDB_DEBUG)
1841 debug_hooks = &sdb_debug_hooks;
1843 #ifdef DWARF2_DEBUGGING_INFO
1844 else if (write_symbols == DWARF2_DEBUG)
1845 debug_hooks = &dwarf2_debug_hooks;
1847 #ifdef VMS_DEBUGGING_INFO
1848 else if (write_symbols == VMS_DEBUG || write_symbols == VMS_AND_DWARF2_DEBUG)
1849 debug_hooks = &vmsdbg_debug_hooks;
1852 error ("target system does not support the \"%s\" debug format",
1853 debug_type_names[write_symbols]);
1855 /* Now we know which debug output will be used so we can set
1856 flag_var_tracking, flag_rename_registers if the user has
1857 not specified them. */
1858 if (debug_info_level < DINFO_LEVEL_NORMAL
1859 || debug_hooks->var_location == do_nothing_debug_hooks.var_location)
1861 if (flag_var_tracking == 1
1862 || flag_var_tracking_uninit == 1)
1864 if (debug_info_level < DINFO_LEVEL_NORMAL)
1865 warning (0, "variable tracking requested, but useless unless "
1866 "producing debug info");
1868 warning (0, "variable tracking requested, but not supported "
1869 "by this debug format");
1871 flag_var_tracking = 0;
1872 flag_var_tracking_uninit = 0;
1875 if (flag_rename_registers == AUTODETECT_VALUE)
1876 flag_rename_registers = default_debug_hooks->var_location
1877 != do_nothing_debug_hooks.var_location;
1879 if (flag_var_tracking == AUTODETECT_VALUE)
1880 flag_var_tracking = optimize >= 1;
1882 if (flag_tree_cselim == AUTODETECT_VALUE)
1883 #ifdef HAVE_conditional_move
1884 flag_tree_cselim = 1;
1886 flag_tree_cselim = 0;
1889 /* If the user specifically requested variable tracking with tagging
1890 uninitialized variables, we need to turn on variable tracking.
1891 (We already determined above that variable tracking is feasible.) */
1892 if (flag_var_tracking_uninit)
1893 flag_var_tracking = 1;
1895 /* If auxiliary info generation is desired, open the output file.
1896 This goes in the same directory as the source file--unlike
1897 all the other output files. */
1898 if (flag_gen_aux_info)
1900 aux_info_file = fopen (aux_info_file_name, "w");
1901 if (aux_info_file == 0)
1902 fatal_error ("can%'t open %s: %m", aux_info_file_name);
1905 if (! targetm.have_named_sections)
1907 if (flag_function_sections)
1909 warning (0, "-ffunction-sections not supported for this target");
1910 flag_function_sections = 0;
1912 if (flag_data_sections)
1914 warning (0, "-fdata-sections not supported for this target");
1915 flag_data_sections = 0;
1919 if (flag_function_sections && profile_flag)
1921 warning (0, "-ffunction-sections disabled; it makes profiling impossible");
1922 flag_function_sections = 0;
1925 #ifndef HAVE_prefetch
1926 if (flag_prefetch_loop_arrays)
1928 warning (0, "-fprefetch-loop-arrays not supported for this target");
1929 flag_prefetch_loop_arrays = 0;
1932 if (flag_prefetch_loop_arrays && !HAVE_prefetch)
1934 warning (0, "-fprefetch-loop-arrays not supported for this target (try -march switches)");
1935 flag_prefetch_loop_arrays = 0;
1939 /* This combination of options isn't handled for i386 targets and doesn't
1940 make much sense anyway, so don't allow it. */
1941 if (flag_prefetch_loop_arrays && optimize_size)
1943 warning (0, "-fprefetch-loop-arrays is not supported with -Os");
1944 flag_prefetch_loop_arrays = 0;
1947 /* The presence of IEEE signaling NaNs, implies all math can trap. */
1948 if (flag_signaling_nans)
1949 flag_trapping_math = 1;
1951 /* We cannot reassociate if we want traps or signed zeros. Â */
1952 if (flag_associative_math && (flag_trapping_math || flag_signed_zeros))
1954 warning (0, "-fassociative-math disabled; other options take precedence");
1955 flag_associative_math = 0;
1958 /* With -fcx-limited-range, we do cheap and quick complex arithmetic. */
1959 if (flag_cx_limited_range)
1960 flag_complex_method = 0;
1962 /* With -fcx-fortran-rules, we do something in-between cheap and C99. */
1963 if (flag_cx_fortran_rules)
1964 flag_complex_method = 1;
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 require a frame pointer "
1985 flag_omit_frame_pointer = 0;
1989 /* This function can be called multiple times to reinitialize the compiler
1990 back end when register classes or instruction sets have changed,
1991 before each function. */
1993 backend_init_target (void)
1995 /* Initialize alignment variables. */
1998 /* This reinitializes hard_frame_pointer, and calls init_reg_modes_target()
1999 to initialize reg_raw_mode[]. */
2002 /* This invokes target hooks to set fixed_reg[] etc, which is
2006 /* This depends on stack_pointer_rtx. */
2007 init_fake_stack_mems ();
2009 /* Sets static_base_value[HARD_FRAME_POINTER_REGNUM], which is
2011 init_alias_target ();
2013 /* Depends on HARD_FRAME_POINTER_REGNUM. */
2016 /* The following initialization functions need to generate rtl, so
2017 provide a dummy function context for them. */
2018 init_dummy_function_start ();
2020 /* rtx_cost is mode-dependent, so cached values need to be recomputed
2021 on a mode change. */
2024 /* We may need to recompute regno_save_code[] and regno_restore_code[]
2025 after a mode change as well. */
2026 if (flag_caller_saves)
2027 init_caller_save ();
2028 expand_dummy_function_end ();
2031 /* Initialize the compiler back end. This function is called only once,
2032 when starting the compiler. */
2036 init_emit_once (debug_info_level == DINFO_LEVEL_NORMAL
2037 || debug_info_level == DINFO_LEVEL_VERBOSE
2038 #ifdef VMS_DEBUGGING_INFO
2039 /* Enable line number info for traceback. */
2040 || debug_info_level > DINFO_LEVEL_NONE
2042 || flag_test_coverage);
2045 init_inline_once ();
2046 init_varasm_once ();
2047 save_register_info ();
2049 /* Initialize the target-specific back end pieces. */
2051 backend_init_target ();
2054 /* Initialize excess precision settings. */
2056 init_excess_precision (void)
2058 /* Adjust excess precision handling based on the target options. If
2059 the front end cannot handle it, flag_excess_precision_cmdline
2060 will already have been set accordingly in the post_options
2062 gcc_assert (flag_excess_precision_cmdline != EXCESS_PRECISION_DEFAULT);
2063 flag_excess_precision = flag_excess_precision_cmdline;
2064 if (flag_unsafe_math_optimizations)
2065 flag_excess_precision = EXCESS_PRECISION_FAST;
2066 if (flag_excess_precision == EXCESS_PRECISION_STANDARD)
2068 int flt_eval_method = TARGET_FLT_EVAL_METHOD;
2069 switch (flt_eval_method)
2073 /* Either the target acts unpredictably (-1) or has all the
2074 operations required not to have excess precision (0). */
2075 flag_excess_precision = EXCESS_PRECISION_FAST;
2079 /* In these cases, predictable excess precision makes
2083 /* Any other implementation-defined FLT_EVAL_METHOD values
2084 require the compiler to handle the associated excess
2085 precision rules in excess_precision_type. */
2091 /* Initialize things that are both lang-dependent and target-dependent.
2092 This function can be called more than once if target parameters change. */
2094 lang_dependent_init_target (void)
2096 /* This determines excess precision settings. */
2097 init_excess_precision ();
2099 /* This creates various _DECL nodes, so needs to be called after the
2100 front end is initialized. It also depends on the HAVE_xxx macros
2101 generated from the target machine description. */
2104 /* The following initialization functions need to generate rtl, so
2105 provide a dummy function context for them. */
2106 init_dummy_function_start ();
2108 /* Do the target-specific parts of expr initialization. */
2109 init_expr_target ();
2111 /* Although the actions of these functions are language-independent,
2112 they use optabs, so we cannot call them from backend_init. */
2116 expand_dummy_function_end ();
2119 /* Language-dependent initialization. Returns nonzero on success. */
2121 lang_dependent_init (const char *name)
2123 location_t save_loc = input_location;
2124 if (dump_base_name == 0)
2125 dump_base_name = name && name[0] ? name : "gccdump";
2127 /* Other front-end initialization. */
2128 input_location = BUILTINS_LOCATION;
2129 if (lang_hooks.init () == 0)
2131 input_location = save_loc;
2133 init_asm_output (name);
2135 /* This creates various _DECL nodes, so needs to be called after the
2136 front end is initialized. */
2139 /* Do the target-specific parts of the initialization. */
2140 lang_dependent_init_target ();
2142 /* If dbx symbol table desired, initialize writing it and output the
2143 predefined types. */
2144 timevar_push (TV_SYMOUT);
2146 #if defined DWARF2_DEBUGGING_INFO || defined DWARF2_UNWIND_INFO
2147 if (dwarf2out_do_frame ())
2148 dwarf2out_frame_init ();
2151 /* Now we have the correct original filename, we can initialize
2153 (*debug_hooks->init) (name);
2155 timevar_pop (TV_SYMOUT);
2161 /* Reinitialize everything when target parameters, such as register usage,
2164 target_reinit (void)
2166 /* Reinitialize RTL backend. */
2167 backend_init_target ();
2169 /* Reinitialize lang-dependent parts. */
2170 lang_dependent_init_target ();
2174 dump_memory_report (bool final)
2176 ggc_print_statistics ();
2177 stringpool_statistics ();
2178 dump_tree_statistics ();
2179 dump_gimple_statistics ();
2180 dump_rtx_statistics ();
2181 dump_varray_statistics ();
2182 dump_alloc_pool_statistics ();
2183 dump_bitmap_statistics ();
2184 dump_vec_loc_statistics ();
2185 dump_ggc_loc_statistics (final);
2186 dump_alias_stats (stderr);
2187 dump_pta_stats (stderr);
2190 /* Clean up: close opened files, etc. */
2195 /* Close the dump files. */
2196 if (flag_gen_aux_info)
2198 fclose (aux_info_file);
2200 unlink (aux_info_file_name);
2203 /* Close non-debugging input and output files. Take special care to note
2204 whether fclose returns an error, since the pages might still be on the
2205 buffer chain while the file is open. */
2209 if (ferror (asm_out_file) != 0)
2210 fatal_error ("error writing to %s: %m", asm_file_name);
2211 if (fclose (asm_out_file) != 0)
2212 fatal_error ("error closing %s: %m", asm_file_name);
2216 finish_optimization_passes ();
2221 dump_memory_report (true);
2223 /* Language-specific end of compilation actions. */
2224 lang_hooks.finish ();
2227 /* Initialize the compiler, and compile the input file. */
2231 /* Initialize timing first. The C front ends read the main file in
2232 the post_options hook, and C++ does file timings. */
2233 if (time_report || !quiet_flag || flag_detailed_statistics)
2235 timevar_start (TV_TOTAL);
2239 /* Don't do any more if an error has already occurred. */
2242 /* This must be run always, because it is needed to compute the FP
2243 predefined macros, such as __LDBL_MAX__, for targets using non
2244 default FP formats. */
2245 init_adjust_machine_modes ();
2247 /* Set up the back-end if requested. */
2251 /* Language-dependent initialization. Returns true on success. */
2252 if (lang_dependent_init (main_input_filename))
2257 /* Invoke registered plugin callbacks. */
2258 invoke_plugin_callbacks (PLUGIN_FINISH_UNIT, NULL);
2261 /* Stop timing and print the times. */
2262 timevar_stop (TV_TOTAL);
2263 timevar_print (stderr);
2266 /* Entry point of cc1, cc1plus, jc1, f771, etc.
2267 Exit code is FATAL_EXIT_CODE if can't open files or if there were
2268 any errors, or SUCCESS_EXIT_CODE if compilation succeeded.
2270 It is not safe to call this function more than once. */
2273 toplev_main (int argc, char **argv)
2275 expandargv (&argc, &argv);
2277 save_argv = (const char **) argv;
2279 /* Initialization of GCC's environment, and diagnostics. */
2280 general_init (argv[0]);
2282 /* Parse the options and do minimal processing; basically just
2283 enough to default flags appropriately. */
2284 decode_options (argc, (const char **) argv);
2288 initialize_plugins ();
2291 print_version (stderr, "");
2294 print_plugins_help (stderr, "");
2296 /* Exit early if we can (e.g. -help). */
2297 if (!exit_after_options)
2300 if (warningcount || errorcount)
2301 print_ignored_options ();
2303 /* Invoke registered plugin callbacks if any. */
2304 invoke_plugin_callbacks (PLUGIN_FINISH, NULL);
2306 finalize_plugins ();
2307 if (errorcount || sorrycount)
2308 return (FATAL_EXIT_CODE);
2310 return (SUCCESS_EXIT_CODE);