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 ",
431 identifier_to_locale (IDENTIFIER_POINTER (DECL_NAME (decl))));
433 fprintf (stderr, " %s",
434 identifier_to_locale (lang_hooks.decl_printable_name (decl, 2)));
436 pp_needs_newline (global_dc->printer) = true;
437 diagnostic_set_last_function (global_dc, (diagnostic_info *) NULL);
441 /* Initialize local_tick with the time of day, or -1 if
442 flag_random_seed is set. */
445 init_local_tick (void)
447 if (!flag_random_seed)
449 /* Get some more or less random data. */
450 #ifdef HAVE_GETTIMEOFDAY
454 gettimeofday (&tv, NULL);
455 local_tick = tv.tv_sec * 1000 + tv.tv_usec / 1000;
459 time_t now = time (NULL);
461 if (now != (time_t)-1)
462 local_tick = (unsigned) now;
470 /* Set up a default flag_random_seed and local_tick, unless the user
471 already specified one. Must be called after init_local_tick. */
474 init_random_seed (void)
476 unsigned HOST_WIDE_INT value;
477 static char random_seed[HOST_BITS_PER_WIDE_INT / 4 + 3];
479 value = local_tick ^ getpid ();
481 sprintf (random_seed, HOST_WIDE_INT_PRINT_HEX, value);
482 flag_random_seed = random_seed;
485 /* Obtain the random_seed string. Unless NOINIT, initialize it if
486 it's not provided in the command line. */
489 get_random_seed (bool noinit)
491 if (!flag_random_seed && !noinit)
493 return flag_random_seed;
496 /* Modify the random_seed string to VAL. Return its previous
500 set_random_seed (const char *val)
502 const char *old = flag_random_seed;
503 flag_random_seed = val;
507 /* Decode the string P as an integral parameter.
508 If the string is indeed an integer return its numeric value else
509 issue an Invalid Option error for the option PNAME and return DEFVAL.
510 If PNAME is zero just return DEFVAL, do not call error. */
513 read_integral_parameter (const char *p, const char *pname, const int defval)
515 const char *endp = p;
528 error ("invalid option argument %qs", pname);
535 /* When compiling with a recent enough GCC, we use the GNU C "extern inline"
536 for floor_log2 and exact_log2; see toplev.h. That construct, however,
537 conflicts with the ISO C++ One Definition Rule. */
539 #if GCC_VERSION < 3004 || !defined (__cplusplus)
541 /* Given X, an unsigned number, return the largest int Y such that 2**Y <= X.
542 If X is 0, return -1. */
545 floor_log2 (unsigned HOST_WIDE_INT x)
553 t = HOST_BITS_PER_WIDE_INT - 1 - (int) CLZ_HWI (x);
555 if (HOST_BITS_PER_WIDE_INT > 64)
556 if (x >= (unsigned HOST_WIDE_INT) 1 << (t + 64))
558 if (HOST_BITS_PER_WIDE_INT > 32)
559 if (x >= ((unsigned HOST_WIDE_INT) 1) << (t + 32))
561 if (x >= ((unsigned HOST_WIDE_INT) 1) << (t + 16))
563 if (x >= ((unsigned HOST_WIDE_INT) 1) << (t + 8))
565 if (x >= ((unsigned HOST_WIDE_INT) 1) << (t + 4))
567 if (x >= ((unsigned HOST_WIDE_INT) 1) << (t + 2))
569 if (x >= ((unsigned HOST_WIDE_INT) 1) << (t + 1))
576 /* Return the logarithm of X, base 2, considering X unsigned,
577 if X is a power of 2. Otherwise, returns -1. */
580 exact_log2 (unsigned HOST_WIDE_INT x)
585 return x ? CTZ_HWI (x) : -1;
587 return floor_log2 (x);
591 #endif /* GCC_VERSION < 3004 || !defined (__cplusplus) */
593 /* Handler for fatal signals, such as SIGSEGV. These are transformed
594 into ICE messages, which is much more user friendly. In case the
595 error printer crashes, reset the signal to prevent infinite recursion. */
598 crash_signal (int signo)
600 signal (signo, SIG_DFL);
602 /* If we crashed while processing an ASM statement, then be a little more
603 graceful. It's most likely the user's fault. */
604 if (this_is_asm_operands)
606 output_operand_lossage ("unrecoverable error");
607 exit (FATAL_EXIT_CODE);
610 internal_error ("%s", strsignal (signo));
613 /* Arrange to dump core on error. (The regular error message is still
614 printed first, except in the case of abort().) */
617 setup_core_dumping (void)
620 signal (SIGABRT, SIG_DFL);
622 #if defined(HAVE_SETRLIMIT)
625 if (getrlimit (RLIMIT_CORE, &rlim) != 0)
626 fatal_error ("getting core file size maximum limit: %m");
627 rlim.rlim_cur = rlim.rlim_max;
628 if (setrlimit (RLIMIT_CORE, &rlim) != 0)
629 fatal_error ("setting core file size limit to maximum: %m");
632 diagnostic_abort_on_error (global_dc);
636 /* Strip off a legitimate source ending from the input string NAME of
637 length LEN. Rather than having to know the names used by all of
638 our front ends, we strip off an ending of a period followed by
639 up to five characters. (Java uses ".class".) */
642 strip_off_ending (char *name, int len)
645 for (i = 2; i < 6 && len > i; i++)
647 if (name[len - i] == '.')
649 name[len - i] = '\0';
655 /* Output a quoted string. */
658 output_quoted_string (FILE *asm_file, const char *string)
660 #ifdef OUTPUT_QUOTED_STRING
661 OUTPUT_QUOTED_STRING (asm_file, string);
665 putc ('\"', asm_file);
666 while ((c = *string++) != 0)
670 if (c == '\"' || c == '\\')
671 putc ('\\', asm_file);
675 fprintf (asm_file, "\\%03o", (unsigned char) c);
677 putc ('\"', asm_file);
681 /* Output a file name in the form wanted by System V. */
684 output_file_directive (FILE *asm_file, const char *input_name)
689 if (input_name == NULL)
690 input_name = "<stdin>";
692 input_name = remap_debug_filename (input_name);
694 len = strlen (input_name);
695 na = input_name + len;
697 /* NA gets INPUT_NAME sans directory names. */
698 while (na > input_name)
700 if (IS_DIR_SEPARATOR (na[-1]))
705 #ifdef ASM_OUTPUT_SOURCE_FILENAME
706 ASM_OUTPUT_SOURCE_FILENAME (asm_file, na);
708 fprintf (asm_file, "\t.file\t");
709 output_quoted_string (asm_file, na);
710 fputc ('\n', asm_file);
714 /* A subroutine of wrapup_global_declarations. We've come to the end of
715 the compilation unit. All deferred variables should be undeferred,
716 and all incomplete decls should be finalized. */
719 wrapup_global_declaration_1 (tree decl)
721 /* We're not deferring this any longer. Assignment is conditional to
722 avoid needlessly dirtying PCH pages. */
723 if (CODE_CONTAINS_STRUCT (TREE_CODE (decl), TS_DECL_WITH_VIS)
724 && DECL_DEFER_OUTPUT (decl) != 0)
725 DECL_DEFER_OUTPUT (decl) = 0;
727 if (TREE_CODE (decl) == VAR_DECL && DECL_SIZE (decl) == 0)
728 lang_hooks.finish_incomplete_decl (decl);
731 /* A subroutine of wrapup_global_declarations. Decide whether or not DECL
732 needs to be output. Return true if it is output. */
735 wrapup_global_declaration_2 (tree decl)
737 if (TREE_ASM_WRITTEN (decl) || DECL_EXTERNAL (decl))
740 /* Don't write out static consts, unless we still need them.
742 We also keep static consts if not optimizing (for debugging),
743 unless the user specified -fno-keep-static-consts.
744 ??? They might be better written into the debug information.
745 This is possible when using DWARF.
747 A language processor that wants static constants to be always
748 written out (even if it is not used) is responsible for
749 calling rest_of_decl_compilation itself. E.g. the C front-end
750 calls rest_of_decl_compilation from finish_decl.
751 One motivation for this is that is conventional in some
752 environments to write things like:
753 static const char rcsid[] = "... version string ...";
754 intending to force the string to be in the executable.
756 A language processor that would prefer to have unneeded
757 static constants "optimized away" would just defer writing
758 them out until here. E.g. C++ does this, because static
759 constants are often defined in header files.
761 ??? A tempting alternative (for both C and C++) would be
762 to force a constant to be written if and only if it is
763 defined in a main file, as opposed to an include file. */
765 if (TREE_CODE (decl) == VAR_DECL && TREE_STATIC (decl))
767 struct varpool_node *node;
769 node = varpool_node (decl);
773 else if (node->alias)
775 else if (!cgraph_global_info_ready
777 || TREE_USED (DECL_ASSEMBLER_NAME (decl))))
779 else if (node->needed)
781 else if (DECL_COMDAT (decl))
783 else if (TREE_READONLY (decl) && !TREE_PUBLIC (decl)
784 && (optimize || !flag_keep_static_consts
785 || DECL_ARTIFICIAL (decl)))
790 rest_of_decl_compilation (decl, 1, 1);
798 /* Do any final processing required for the declarations in VEC, of
799 which there are LEN. We write out inline functions and variables
800 that have been deferred until this point, but which are required.
801 Returns nonzero if anything was put out. */
804 wrapup_global_declarations (tree *vec, int len)
806 bool reconsider, output_something = false;
809 for (i = 0; i < len; i++)
810 wrapup_global_declaration_1 (vec[i]);
812 /* Now emit any global variables or functions that we have been
813 putting off. We need to loop in case one of the things emitted
814 here references another one which comes earlier in the list. */
818 for (i = 0; i < len; i++)
819 reconsider |= wrapup_global_declaration_2 (vec[i]);
821 output_something = true;
825 return output_something;
828 /* A subroutine of check_global_declarations. Issue appropriate warnings
829 for the global declaration DECL. */
832 check_global_declaration_1 (tree decl)
834 /* Warn about any function declared static but not defined. We don't
835 warn about variables, because many programs have static variables
836 that exist only to get some text into the object file. */
837 if (TREE_CODE (decl) == FUNCTION_DECL
838 && DECL_INITIAL (decl) == 0
839 && DECL_EXTERNAL (decl)
840 && ! DECL_ARTIFICIAL (decl)
841 && ! TREE_NO_WARNING (decl)
842 && ! TREE_PUBLIC (decl)
843 && (warn_unused_function
844 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl))))
846 if (TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl)))
847 pedwarn (input_location, 0, "%q+F used but never defined", decl);
849 warning (OPT_Wunused_function, "%q+F declared %<static%> but never defined", decl);
850 /* This symbol is effectively an "extern" declaration now. */
851 TREE_PUBLIC (decl) = 1;
852 assemble_external (decl);
855 /* Warn about static fns or vars defined but not used. */
856 if (((warn_unused_function && TREE_CODE (decl) == FUNCTION_DECL)
857 /* We don't warn about "static const" variables because the
858 "rcs_id" idiom uses that construction. */
859 || (warn_unused_variable
860 && TREE_CODE (decl) == VAR_DECL && ! TREE_READONLY (decl)))
861 && ! DECL_IN_SYSTEM_HEADER (decl)
862 && ! TREE_USED (decl)
863 /* The TREE_USED bit for file-scope decls is kept in the identifier,
864 to handle multiple external decls in different scopes. */
865 && ! (DECL_NAME (decl) && TREE_USED (DECL_NAME (decl)))
866 && ! DECL_EXTERNAL (decl)
867 && ! TREE_PUBLIC (decl)
868 /* A volatile variable might be used in some non-obvious way. */
869 && ! TREE_THIS_VOLATILE (decl)
870 /* Global register variables must be declared to reserve them. */
871 && ! (TREE_CODE (decl) == VAR_DECL && DECL_REGISTER (decl))
872 /* Otherwise, ask the language. */
873 && lang_hooks.decls.warn_unused_global (decl))
874 warning ((TREE_CODE (decl) == FUNCTION_DECL)
875 ? OPT_Wunused_function
876 : OPT_Wunused_variable,
877 "%q+D defined but not used", decl);
880 /* Issue appropriate warnings for the global declarations in VEC (of
881 which there are LEN). */
884 check_global_declarations (tree *vec, int len)
888 for (i = 0; i < len; i++)
889 check_global_declaration_1 (vec[i]);
892 /* Emit debugging information for all global declarations in VEC. */
895 emit_debug_global_declarations (tree *vec, int len)
899 /* Avoid confusing the debug information machinery when there are errors. */
900 if (errorcount != 0 || sorrycount != 0)
903 timevar_push (TV_SYMOUT);
904 for (i = 0; i < len; i++)
905 debug_hooks->global_decl (vec[i]);
906 timevar_pop (TV_SYMOUT);
909 /* Warn about a use of an identifier which was marked deprecated. */
911 warn_deprecated_use (tree node, tree attr)
915 if (node == 0 || !warn_deprecated_decl)
921 attr = DECL_ATTRIBUTES (node);
922 else if (TYPE_P (node))
924 tree decl = TYPE_STUB_DECL (node);
926 attr = lookup_attribute ("deprecated",
927 TYPE_ATTRIBUTES (TREE_TYPE (decl)));
932 attr = lookup_attribute ("deprecated", attr);
935 msg = TREE_STRING_POINTER (TREE_VALUE (TREE_VALUE (attr)));
941 expanded_location xloc = expand_location (DECL_SOURCE_LOCATION (node));
943 warning (OPT_Wdeprecated_declarations,
944 "%qD is deprecated (declared at %s:%d): %s",
945 node, xloc.file, xloc.line, msg);
947 warning (OPT_Wdeprecated_declarations,
948 "%qD is deprecated (declared at %s:%d)",
949 node, xloc.file, xloc.line);
951 else if (TYPE_P (node))
953 tree what = NULL_TREE;
954 tree decl = TYPE_STUB_DECL (node);
956 if (TYPE_NAME (node))
958 if (TREE_CODE (TYPE_NAME (node)) == IDENTIFIER_NODE)
959 what = TYPE_NAME (node);
960 else if (TREE_CODE (TYPE_NAME (node)) == TYPE_DECL
961 && DECL_NAME (TYPE_NAME (node)))
962 what = DECL_NAME (TYPE_NAME (node));
967 expanded_location xloc
968 = expand_location (DECL_SOURCE_LOCATION (decl));
972 warning (OPT_Wdeprecated_declarations,
973 "%qE is deprecated (declared at %s:%d): %s",
974 what, xloc.file, xloc.line, msg);
976 warning (OPT_Wdeprecated_declarations,
977 "%qE is deprecated (declared at %s:%d)", what,
978 xloc.file, xloc.line);
983 warning (OPT_Wdeprecated_declarations,
984 "type is deprecated (declared at %s:%d): %s",
985 xloc.file, xloc.line, msg);
987 warning (OPT_Wdeprecated_declarations,
988 "type is deprecated (declared at %s:%d)",
989 xloc.file, xloc.line);
997 warning (OPT_Wdeprecated_declarations, "%qE is deprecated: %s",
1000 warning (OPT_Wdeprecated_declarations, "%qE is deprecated", what);
1005 warning (OPT_Wdeprecated_declarations, "type is deprecated: %s",
1008 warning (OPT_Wdeprecated_declarations, "type is deprecated");
1014 /* Compile an entire translation unit. Write a file of assembly
1015 output and various debugging dumps. */
1020 /* Initialize yet another pass. */
1022 ggc_protect_identifiers = true;
1025 init_final (main_input_filename);
1026 coverage_init (aux_base_name);
1029 timevar_push (TV_PARSE);
1031 /* Call the parser, which parses the entire file (calling
1032 rest_of_compilation for each function). */
1033 lang_hooks.parse_file (set_yydebug);
1035 /* Compilation is now finished except for writing
1036 what's left of the symbol table output. */
1037 timevar_pop (TV_PARSE);
1039 if (flag_syntax_only)
1042 ggc_protect_identifiers = false;
1044 lang_hooks.decls.final_write_globals ();
1046 if (errorcount || sorrycount)
1049 varpool_assemble_pending_decls ();
1050 finish_aliases_2 ();
1052 /* Likewise for mudflap static object registrations. */
1054 mudflap_finish_file ();
1056 /* Likewise for emulated thread-local storage. */
1057 if (!targetm.have_tls)
1060 output_shared_constant_pool ();
1061 output_object_blocks ();
1063 /* Write out any pending weak symbol declarations. */
1066 /* Do dbx symbols. */
1067 timevar_push (TV_SYMOUT);
1069 #if defined DWARF2_DEBUGGING_INFO || defined DWARF2_UNWIND_INFO
1070 if (dwarf2out_do_frame ())
1071 dwarf2out_frame_finish ();
1074 (*debug_hooks->finish) (main_input_filename);
1075 timevar_pop (TV_SYMOUT);
1077 /* Output some stuff at end of file if nec. */
1079 dw2_output_indirect_constants ();
1081 /* Flush any pending external directives. */
1082 process_pending_assemble_externals ();
1084 /* Attach a special .ident directive to the end of the file to identify
1085 the version of GCC which compiled this code. The format of the .ident
1086 string is patterned after the ones produced by native SVR4 compilers. */
1090 const char *pkg_version = "(GNU) ";
1092 if (strcmp ("(GCC) ", pkgversion_string))
1093 pkg_version = pkgversion_string;
1094 fprintf (asm_out_file, "%s\"GCC: %s%s\"\n",
1095 IDENT_ASM_OP, pkg_version, version_string);
1099 /* This must be at the end. Some target ports emit end of file directives
1100 into the assembly file here, and hence we can not output anything to the
1101 assembly file after this point. */
1102 targetm.asm_out.file_end ();
1105 /* Parse a -d... command line switch. */
1108 decode_d_option (const char *arg)
1119 flag_print_asm_name = 1;
1122 flag_dump_rtl_in_asm = 1;
1123 flag_print_asm_name = 1;
1126 graph_dump_format = vcg;
1129 rtl_dump_and_exit = 1;
1134 case 'D': /* These are handled by the preprocessor. */
1141 setup_core_dumping();
1144 enable_rtl_dump_file ();
1148 warning (0, "unrecognized gcc debugging option: %c", c);
1153 /* Indexed by enum debug_info_type. */
1154 const char *const debug_type_names[] =
1156 "none", "stabs", "coff", "dwarf-2", "xcoff", "vms"
1159 /* Print version information to FILE.
1160 Each line begins with INDENT (for the case where FILE is the
1161 assembler output file). */
1164 print_version (FILE *file, const char *indent)
1166 static const char fmt1[] =
1168 N_("%s%s%s %sversion %s (%s)\n%s\tcompiled by GNU C version %s, ")
1170 N_("%s%s%s %sversion %s (%s) compiled by CC, ")
1173 static const char fmt2[] =
1174 N_("GMP version %s, MPFR version %s.\n");
1175 static const char fmt3[] =
1176 N_("%s%swarning: %s header version %s differs from library version %s.\n");
1177 static const char fmt4[] =
1178 N_("%s%sGGC heuristics: --param ggc-min-expand=%d --param ggc-min-heapsize=%d\n");
1180 #define __VERSION__ "[?]"
1183 file == stderr ? _(fmt1) : fmt1,
1184 indent, *indent != 0 ? " " : "",
1185 lang_hooks.name, pkgversion_string, version_string, TARGET_NAME,
1186 indent, __VERSION__);
1188 /* We need to stringify the GMP macro values. Ugh, gmp_version has
1189 two string formats, "i.j.k" and "i.j" when k is zero. As of
1190 gmp-4.3.0, GMP always uses the 3 number format. */
1191 #define GCC_GMP_STRINGIFY_VERSION3(X) #X
1192 #define GCC_GMP_STRINGIFY_VERSION2(X) GCC_GMP_STRINGIFY_VERSION3(X)
1193 #define GCC_GMP_VERSION_NUM(X,Y,Z) (((X) << 16L) | ((Y) << 8) | (Z))
1194 #define GCC_GMP_VERSION \
1195 GCC_GMP_VERSION_NUM(__GNU_MP_VERSION, __GNU_MP_VERSION_MINOR, __GNU_MP_VERSION_PATCHLEVEL)
1196 #if GCC_GMP_VERSION < GCC_GMP_VERSION_NUM(4,3,0) && __GNU_MP_VERSION_PATCHLEVEL == 0
1197 #define GCC_GMP_STRINGIFY_VERSION GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION) "." \
1198 GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION_MINOR)
1200 #define GCC_GMP_STRINGIFY_VERSION GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION) "." \
1201 GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION_MINOR) "." \
1202 GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION_PATCHLEVEL)
1205 file == stderr ? _(fmt2) : fmt2,
1206 GCC_GMP_STRINGIFY_VERSION, MPFR_VERSION_STRING);
1207 if (strcmp (GCC_GMP_STRINGIFY_VERSION, gmp_version))
1209 file == stderr ? _(fmt3) : fmt3,
1210 indent, *indent != 0 ? " " : "",
1211 "GMP", GCC_GMP_STRINGIFY_VERSION, gmp_version);
1212 if (strcmp (MPFR_VERSION_STRING, mpfr_get_version ()))
1214 file == stderr ? _(fmt3) : fmt3,
1215 indent, *indent != 0 ? " " : "",
1216 "MPFR", MPFR_VERSION_STRING, mpfr_get_version ());
1218 file == stderr ? _(fmt4) : fmt4,
1219 indent, *indent != 0 ? " " : "",
1220 PARAM_VALUE (GGC_MIN_EXPAND), PARAM_VALUE (GGC_MIN_HEAPSIZE));
1222 print_plugins_versions (file, indent);
1225 #ifdef ASM_COMMENT_START
1227 print_to_asm_out_file (print_switch_type type, const char * text)
1229 bool prepend_sep = true;
1233 case SWITCH_TYPE_LINE_END:
1234 putc ('\n', asm_out_file);
1237 case SWITCH_TYPE_LINE_START:
1238 fputs (ASM_COMMENT_START, asm_out_file);
1239 return strlen (ASM_COMMENT_START);
1241 case SWITCH_TYPE_DESCRIPTIVE:
1242 if (ASM_COMMENT_START[0] == 0)
1243 prepend_sep = false;
1245 case SWITCH_TYPE_PASSED:
1246 case SWITCH_TYPE_ENABLED:
1248 fputc (' ', asm_out_file);
1249 fprintf (asm_out_file, text);
1250 /* No need to return the length here as
1251 print_single_switch has already done it. */
1261 print_to_stderr (print_switch_type type, const char * text)
1265 case SWITCH_TYPE_LINE_END:
1266 putc ('\n', stderr);
1269 case SWITCH_TYPE_LINE_START:
1272 case SWITCH_TYPE_PASSED:
1273 case SWITCH_TYPE_ENABLED:
1274 fputc (' ', stderr);
1277 case SWITCH_TYPE_DESCRIPTIVE:
1278 fprintf (stderr, text);
1279 /* No need to return the length here as
1280 print_single_switch has already done it. */
1288 /* Print an option value and return the adjusted position in the line.
1289 ??? print_fn doesn't handle errors, eg disk full; presumably other
1290 code will catch a disk full though. */
1293 print_single_switch (print_switch_fn_type print_fn,
1295 print_switch_type type,
1298 /* The ultrix fprintf returns 0 on success, so compute the result
1299 we want here since we need it for the following test. The +1
1300 is for the separator character that will probably be emitted. */
1301 int len = strlen (text) + 1;
1304 && pos + len > MAX_LINE)
1306 print_fn (SWITCH_TYPE_LINE_END, NULL);
1311 pos += print_fn (SWITCH_TYPE_LINE_START, NULL);
1313 print_fn (type, text);
1317 /* Print active target switches using PRINT_FN.
1318 POS is the current cursor position and MAX is the size of a "line".
1319 Each line begins with INDENT and ends with TERM.
1320 Each switch is separated from the next by SEP. */
1323 print_switch_values (print_switch_fn_type print_fn)
1329 /* Fill in the -frandom-seed option, if the user didn't pass it, so
1330 that it can be printed below. This helps reproducibility. */
1331 if (!flag_random_seed)
1332 init_random_seed ();
1334 /* Print the options as passed. */
1335 pos = print_single_switch (print_fn, pos,
1336 SWITCH_TYPE_DESCRIPTIVE, _("options passed: "));
1338 for (p = &save_argv[1]; *p != NULL; p++)
1343 if (strcmp (*p, "-o") == 0
1344 || strcmp (*p, "-dumpbase") == 0
1345 || strcmp (*p, "-auxbase") == 0)
1352 if (strcmp (*p, "-quiet") == 0
1353 || strcmp (*p, "-version") == 0)
1360 pos = print_single_switch (print_fn, pos, SWITCH_TYPE_PASSED, *p);
1364 print_fn (SWITCH_TYPE_LINE_END, NULL);
1366 /* Print the -f and -m options that have been enabled.
1367 We don't handle language specific options but printing argv
1369 pos = print_single_switch (print_fn, 0,
1370 SWITCH_TYPE_DESCRIPTIVE, _("options enabled: "));
1372 for (j = 0; j < cl_options_count; j++)
1373 if ((cl_options[j].flags & CL_REPORT)
1374 && option_enabled (j) > 0)
1375 pos = print_single_switch (print_fn, pos,
1376 SWITCH_TYPE_ENABLED, cl_options[j].opt_text);
1378 print_fn (SWITCH_TYPE_LINE_END, NULL);
1381 /* Open assembly code output file. Do this even if -fsyntax-only is
1382 on, because then the driver will have provided the name of a
1383 temporary file or bit bucket for us. NAME is the file specified on
1384 the command line, possibly NULL. */
1386 init_asm_output (const char *name)
1388 if (name == NULL && asm_file_name == 0)
1389 asm_out_file = stdout;
1392 if (asm_file_name == 0)
1394 int len = strlen (dump_base_name);
1395 char *dumpname = XNEWVEC (char, len + 6);
1397 memcpy (dumpname, dump_base_name, len + 1);
1398 strip_off_ending (dumpname, len);
1399 strcat (dumpname, ".s");
1400 asm_file_name = dumpname;
1402 if (!strcmp (asm_file_name, "-"))
1403 asm_out_file = stdout;
1405 asm_out_file = fopen (asm_file_name, "w+b");
1406 if (asm_out_file == 0)
1407 fatal_error ("can%'t open %s for writing: %m", asm_file_name);
1410 if (!flag_syntax_only)
1412 targetm.asm_out.file_start ();
1414 if (flag_record_gcc_switches)
1416 if (targetm.asm_out.record_gcc_switches)
1418 /* Let the target know that we are about to start recording. */
1419 targetm.asm_out.record_gcc_switches (SWITCH_TYPE_DESCRIPTIVE,
1421 /* Now record the switches. */
1422 print_switch_values (targetm.asm_out.record_gcc_switches);
1423 /* Let the target know that the recording is over. */
1424 targetm.asm_out.record_gcc_switches (SWITCH_TYPE_DESCRIPTIVE,
1428 inform (input_location, "-frecord-gcc-switches is not supported by the current target");
1431 #ifdef ASM_COMMENT_START
1432 if (flag_verbose_asm)
1434 /* Print the list of switches in effect
1435 into the assembler file as comments. */
1436 print_version (asm_out_file, ASM_COMMENT_START);
1437 print_switch_values (print_to_asm_out_file);
1438 fprintf (asm_out_file, "\n");
1444 /* Return true if the state of option OPTION should be stored in PCH files
1445 and checked by default_pch_valid_p. Store the option's current state
1449 option_affects_pch_p (int option, struct cl_option_state *state)
1451 if ((cl_options[option].flags & CL_TARGET) == 0)
1453 if (cl_options[option].flag_var == &target_flags)
1454 if (targetm.check_pch_target_flags)
1456 return get_option_state (option, state);
1459 /* Default version of get_pch_validity.
1460 By default, every flag difference is fatal; that will be mostly right for
1461 most targets, but completely right for very few. */
1464 default_get_pch_validity (size_t *len)
1466 struct cl_option_state state;
1471 if (targetm.check_pch_target_flags)
1472 *len += sizeof (target_flags);
1473 for (i = 0; i < cl_options_count; i++)
1474 if (option_affects_pch_p (i, &state))
1477 result = r = XNEWVEC (char, *len);
1481 if (targetm.check_pch_target_flags)
1483 memcpy (r, &target_flags, sizeof (target_flags));
1484 r += sizeof (target_flags);
1487 for (i = 0; i < cl_options_count; i++)
1488 if (option_affects_pch_p (i, &state))
1490 memcpy (r, state.data, state.size);
1497 /* Return a message which says that a PCH file was created with a different
1498 setting of OPTION. */
1501 pch_option_mismatch (const char *option)
1505 asprintf (&r, _("created and used with differing settings of '%s'"), option);
1507 return _("out of memory");
1511 /* Default version of pch_valid_p. */
1514 default_pch_valid_p (const void *data_p, size_t len)
1516 struct cl_option_state state;
1517 const char *data = (const char *)data_p;
1520 /* -fpic and -fpie also usually make a PCH invalid. */
1521 if (data[0] != flag_pic)
1522 return _("created and used with different settings of -fpic");
1523 if (data[1] != flag_pie)
1524 return _("created and used with different settings of -fpie");
1527 /* Check target_flags. */
1528 if (targetm.check_pch_target_flags)
1533 memcpy (&tf, data, sizeof (target_flags));
1534 data += sizeof (target_flags);
1535 len -= sizeof (target_flags);
1536 r = targetm.check_pch_target_flags (tf);
1541 for (i = 0; i < cl_options_count; i++)
1542 if (option_affects_pch_p (i, &state))
1544 if (memcmp (data, state.data, state.size) != 0)
1545 return pch_option_mismatch (cl_options[i].opt_text);
1553 /* Default tree printer. Handles declarations only. */
1555 default_tree_printer (pretty_printer * pp, text_info *text, const char *spec,
1556 int precision, bool wide, bool set_locus, bool hash)
1560 /* FUTURE: %+x should set the locus. */
1561 if (precision != 0 || wide || hash)
1567 t = va_arg (*text->args_ptr, tree);
1568 if (TREE_CODE (t) == IDENTIFIER_NODE)
1570 pp_identifier (pp, IDENTIFIER_POINTER (t));
1576 t = va_arg (*text->args_ptr, tree);
1577 if (DECL_DEBUG_EXPR_IS_FROM (t) && DECL_DEBUG_EXPR (t))
1578 t = DECL_DEBUG_EXPR (t);
1583 t = va_arg (*text->args_ptr, tree);
1590 if (set_locus && text->locus)
1591 *text->locus = DECL_SOURCE_LOCATION (t);
1595 const char *n = DECL_NAME (t)
1596 ? identifier_to_locale (lang_hooks.decl_printable_name (t, 2))
1601 dump_generic_node (pp, t, 0, TDF_DIAGNOSTIC, 0);
1606 /* A helper function; used as the reallocator function for cpp's line
1609 realloc_for_line_map (void *ptr, size_t len)
1611 return ggc_realloc (ptr, len);
1614 /* Initialization of the front end environment, before command line
1615 options are parsed. Signal handlers, internationalization etc.
1616 ARGV0 is main's argv[0]. */
1618 general_init (const char *argv0)
1622 p = argv0 + strlen (argv0);
1623 while (p != argv0 && !IS_DIR_SEPARATOR (p[-1]))
1627 xmalloc_set_program_name (progname);
1631 /* Unlock the stdio streams. */
1632 unlock_std_streams ();
1634 gcc_init_libintl ();
1636 /* Initialize the diagnostics reporting machinery, so option parsing
1637 can give warnings and errors. */
1638 diagnostic_initialize (global_dc);
1639 /* Set a default printer. Language specific initializations will
1640 override it later. */
1641 pp_format_decoder (global_dc->printer) = &default_tree_printer;
1643 /* Trap fatal signals, e.g. SIGSEGV, and convert them to ICE messages. */
1645 signal (SIGSEGV, crash_signal);
1648 signal (SIGILL, crash_signal);
1651 signal (SIGBUS, crash_signal);
1654 signal (SIGABRT, crash_signal);
1656 #if defined SIGIOT && (!defined SIGABRT || SIGABRT != SIGIOT)
1657 signal (SIGIOT, crash_signal);
1660 signal (SIGFPE, crash_signal);
1663 /* Other host-specific signal setup. */
1664 (*host_hooks.extra_signals)();
1666 /* Initialize the garbage-collector, string pools and tree type hash
1670 line_table = GGC_NEW (struct line_maps);
1671 linemap_init (line_table);
1672 line_table->reallocator = realloc_for_line_map;
1675 /* Initialize register usage now so switches may override. */
1678 /* Register the language-independent parameters. */
1679 add_params (lang_independent_params, LAST_PARAM);
1681 /* This must be done after add_params but before argument processing. */
1682 init_ggc_heuristics();
1683 init_optimization_passes ();
1684 statistics_early_init ();
1687 /* Return true if the current target supports -fsection-anchors. */
1690 target_supports_section_anchors_p (void)
1692 if (targetm.min_anchor_offset == 0 && targetm.max_anchor_offset == 0)
1695 if (targetm.asm_out.output_anchor == NULL)
1701 /* Default the align_* variables to 1 if they're still unset, and
1702 set up the align_*_log variables. */
1704 init_alignments (void)
1706 if (align_loops <= 0)
1708 if (align_loops_max_skip > 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)
1713 if (align_jumps_max_skip > align_jumps)
1714 align_jumps_max_skip = align_jumps - 1;
1715 align_jumps_log = floor_log2 (align_jumps * 2 - 1);
1716 if (align_labels <= 0)
1718 align_labels_log = floor_log2 (align_labels * 2 - 1);
1719 if (align_labels_max_skip > align_labels)
1720 align_labels_max_skip = align_labels - 1;
1721 if (align_functions <= 0)
1722 align_functions = 1;
1723 align_functions_log = floor_log2 (align_functions * 2 - 1);
1726 /* Process the options that have been parsed. */
1728 process_options (void)
1730 /* Just in case lang_hooks.post_options ends up calling a debug_hook.
1731 This can happen with incorrect pre-processed input. */
1732 debug_hooks = &do_nothing_debug_hooks;
1734 /* This replaces set_Wunused. */
1735 if (warn_unused_function == -1)
1736 warn_unused_function = warn_unused;
1737 if (warn_unused_label == -1)
1738 warn_unused_label = warn_unused;
1739 /* Wunused-parameter is enabled if both -Wunused -Wextra are enabled. */
1740 if (warn_unused_parameter == -1)
1741 warn_unused_parameter = (warn_unused && extra_warnings);
1742 if (warn_unused_variable == -1)
1743 warn_unused_variable = warn_unused;
1744 if (warn_unused_value == -1)
1745 warn_unused_value = warn_unused;
1747 /* This replaces set_Wextra. */
1748 if (warn_uninitialized == -1)
1749 warn_uninitialized = extra_warnings;
1751 /* Allow the front end to perform consistency checks and do further
1752 initialization based on the command line options. This hook also
1753 sets the original filename if appropriate (e.g. foo.i -> foo.c)
1754 so we can correctly initialize debug output. */
1755 no_backend = lang_hooks.post_options (&main_input_filename);
1757 #ifdef OVERRIDE_OPTIONS
1758 /* Some machines may reject certain combinations of options. */
1762 if (flag_section_anchors && !target_supports_section_anchors_p ())
1764 warning (OPT_fsection_anchors,
1765 "this target does not support %qs", "-fsection-anchors");
1766 flag_section_anchors = 0;
1769 if (flag_short_enums == 2)
1770 flag_short_enums = targetm.default_short_enums ();
1772 /* Set aux_base_name if not already set. */
1775 else if (main_input_filename)
1777 char *name = xstrdup (lbasename (main_input_filename));
1779 strip_off_ending (name, strlen (name));
1780 aux_base_name = name;
1783 aux_base_name = "gccaux";
1788 || flag_loop_interchange
1789 || flag_loop_strip_mine
1790 || flag_graphite_identity)
1791 sorry ("Graphite loop optimizations cannot be used");
1794 /* Unrolling all loops implies that standard loop unrolling must also
1796 if (flag_unroll_all_loops)
1797 flag_unroll_loops = 1;
1799 /* The loop unrolling code assumes that cse will be run after loop.
1800 web and rename-registers also help when run after loop unrolling. */
1802 if (flag_rerun_cse_after_loop == AUTODETECT_VALUE)
1803 flag_rerun_cse_after_loop = flag_unroll_loops || flag_peel_loops;
1804 if (flag_web == AUTODETECT_VALUE)
1805 flag_web = flag_unroll_loops || flag_peel_loops;
1806 if (flag_rename_registers == AUTODETECT_VALUE)
1807 flag_rename_registers = flag_unroll_loops || flag_peel_loops;
1809 if (flag_non_call_exceptions)
1810 flag_asynchronous_unwind_tables = 1;
1811 if (flag_asynchronous_unwind_tables)
1812 flag_unwind_tables = 1;
1814 if (flag_value_profile_transformations)
1815 flag_profile_values = 1;
1817 /* Warn about options that are not supported on this machine. */
1818 #ifndef INSN_SCHEDULING
1819 if (flag_schedule_insns || flag_schedule_insns_after_reload)
1820 warning (0, "instruction scheduling not supported on this target machine");
1823 if (flag_delayed_branch)
1824 warning (0, "this target machine does not have delayed branches");
1827 user_label_prefix = USER_LABEL_PREFIX;
1828 if (flag_leading_underscore != -1)
1830 /* If the default prefix is more complicated than "" or "_",
1831 issue a warning and ignore this option. */
1832 if (user_label_prefix[0] == 0 ||
1833 (user_label_prefix[0] == '_' && user_label_prefix[1] == 0))
1835 user_label_prefix = flag_leading_underscore ? "_" : "";
1838 warning (0, "-f%sleading-underscore not supported on this target machine",
1839 flag_leading_underscore ? "" : "no-");
1842 /* If we are in verbose mode, write out the version and maybe all the
1843 option flags in use. */
1846 print_version (stderr, "");
1848 print_switch_values (print_to_stderr);
1851 if (flag_syntax_only)
1853 write_symbols = NO_DEBUG;
1857 /* A lot of code assumes write_symbols == NO_DEBUG if the debugging
1859 if (debug_info_level == DINFO_LEVEL_NONE)
1860 write_symbols = NO_DEBUG;
1862 /* Now we know write_symbols, set up the debug hooks based on it.
1863 By default we do nothing for debug output. */
1864 if (PREFERRED_DEBUGGING_TYPE == NO_DEBUG)
1865 default_debug_hooks = &do_nothing_debug_hooks;
1866 #if defined(DBX_DEBUGGING_INFO)
1867 else if (PREFERRED_DEBUGGING_TYPE == DBX_DEBUG)
1868 default_debug_hooks = &dbx_debug_hooks;
1870 #if defined(XCOFF_DEBUGGING_INFO)
1871 else if (PREFERRED_DEBUGGING_TYPE == XCOFF_DEBUG)
1872 default_debug_hooks = &xcoff_debug_hooks;
1874 #ifdef SDB_DEBUGGING_INFO
1875 else if (PREFERRED_DEBUGGING_TYPE == SDB_DEBUG)
1876 default_debug_hooks = &sdb_debug_hooks;
1878 #ifdef DWARF2_DEBUGGING_INFO
1879 else if (PREFERRED_DEBUGGING_TYPE == DWARF2_DEBUG)
1880 default_debug_hooks = &dwarf2_debug_hooks;
1882 #ifdef VMS_DEBUGGING_INFO
1883 else if (PREFERRED_DEBUGGING_TYPE == VMS_DEBUG
1884 || PREFERRED_DEBUGGING_TYPE == VMS_AND_DWARF2_DEBUG)
1885 default_debug_hooks = &vmsdbg_debug_hooks;
1888 if (write_symbols == NO_DEBUG)
1890 #if defined(DBX_DEBUGGING_INFO)
1891 else if (write_symbols == DBX_DEBUG)
1892 debug_hooks = &dbx_debug_hooks;
1894 #if defined(XCOFF_DEBUGGING_INFO)
1895 else if (write_symbols == XCOFF_DEBUG)
1896 debug_hooks = &xcoff_debug_hooks;
1898 #ifdef SDB_DEBUGGING_INFO
1899 else if (write_symbols == SDB_DEBUG)
1900 debug_hooks = &sdb_debug_hooks;
1902 #ifdef DWARF2_DEBUGGING_INFO
1903 else if (write_symbols == DWARF2_DEBUG)
1904 debug_hooks = &dwarf2_debug_hooks;
1906 #ifdef VMS_DEBUGGING_INFO
1907 else if (write_symbols == VMS_DEBUG || write_symbols == VMS_AND_DWARF2_DEBUG)
1908 debug_hooks = &vmsdbg_debug_hooks;
1911 error ("target system does not support the \"%s\" debug format",
1912 debug_type_names[write_symbols]);
1914 /* Now we know which debug output will be used so we can set
1915 flag_var_tracking, flag_rename_registers if the user has
1916 not specified them. */
1917 if (debug_info_level < DINFO_LEVEL_NORMAL
1918 || debug_hooks->var_location == do_nothing_debug_hooks.var_location)
1920 if (flag_var_tracking == 1
1921 || flag_var_tracking_uninit == 1)
1923 if (debug_info_level < DINFO_LEVEL_NORMAL)
1924 warning (0, "variable tracking requested, but useless unless "
1925 "producing debug info");
1927 warning (0, "variable tracking requested, but not supported "
1928 "by this debug format");
1930 flag_var_tracking = 0;
1931 flag_var_tracking_uninit = 0;
1934 if (flag_rename_registers == AUTODETECT_VALUE)
1935 flag_rename_registers = default_debug_hooks->var_location
1936 != do_nothing_debug_hooks.var_location;
1938 if (flag_var_tracking == AUTODETECT_VALUE)
1939 flag_var_tracking = optimize >= 1;
1941 if (flag_tree_cselim == AUTODETECT_VALUE)
1942 #ifdef HAVE_conditional_move
1943 flag_tree_cselim = 1;
1945 flag_tree_cselim = 0;
1948 /* If the user specifically requested variable tracking with tagging
1949 uninitialized variables, we need to turn on variable tracking.
1950 (We already determined above that variable tracking is feasible.) */
1951 if (flag_var_tracking_uninit)
1952 flag_var_tracking = 1;
1954 /* If auxiliary info generation is desired, open the output file.
1955 This goes in the same directory as the source file--unlike
1956 all the other output files. */
1957 if (flag_gen_aux_info)
1959 aux_info_file = fopen (aux_info_file_name, "w");
1960 if (aux_info_file == 0)
1961 fatal_error ("can%'t open %s: %m", aux_info_file_name);
1964 if (! targetm.have_named_sections)
1966 if (flag_function_sections)
1968 warning (0, "-ffunction-sections not supported for this target");
1969 flag_function_sections = 0;
1971 if (flag_data_sections)
1973 warning (0, "-fdata-sections not supported for this target");
1974 flag_data_sections = 0;
1978 if (flag_function_sections && profile_flag)
1980 warning (0, "-ffunction-sections disabled; it makes profiling impossible");
1981 flag_function_sections = 0;
1984 #ifndef HAVE_prefetch
1985 if (flag_prefetch_loop_arrays)
1987 warning (0, "-fprefetch-loop-arrays not supported for this target");
1988 flag_prefetch_loop_arrays = 0;
1991 if (flag_prefetch_loop_arrays && !HAVE_prefetch)
1993 warning (0, "-fprefetch-loop-arrays not supported for this target (try -march switches)");
1994 flag_prefetch_loop_arrays = 0;
1998 /* This combination of options isn't handled for i386 targets and doesn't
1999 make much sense anyway, so don't allow it. */
2000 if (flag_prefetch_loop_arrays && optimize_size)
2002 warning (0, "-fprefetch-loop-arrays is not supported with -Os");
2003 flag_prefetch_loop_arrays = 0;
2006 /* The presence of IEEE signaling NaNs, implies all math can trap. */
2007 if (flag_signaling_nans)
2008 flag_trapping_math = 1;
2010 /* We cannot reassociate if we want traps or signed zeros. Â */
2011 if (flag_associative_math && (flag_trapping_math || flag_signed_zeros))
2013 warning (0, "-fassociative-math disabled; other options take precedence");
2014 flag_associative_math = 0;
2017 /* With -fcx-limited-range, we do cheap and quick complex arithmetic. */
2018 if (flag_cx_limited_range)
2019 flag_complex_method = 0;
2021 /* With -fcx-fortran-rules, we do something in-between cheap and C99. */
2022 if (flag_cx_fortran_rules)
2023 flag_complex_method = 1;
2025 /* Targets must be able to place spill slots at lower addresses. If the
2026 target already uses a soft frame pointer, the transition is trivial. */
2027 if (!FRAME_GROWS_DOWNWARD && flag_stack_protect)
2029 warning (0, "-fstack-protector not supported for this target");
2030 flag_stack_protect = 0;
2032 if (!flag_stack_protect)
2033 warn_stack_protect = 0;
2035 /* ??? Unwind info is not correct around the CFG unless either a frame
2036 pointer is present or A_O_A is set. Fixing this requires rewriting
2037 unwind info generation to be aware of the CFG and propagating states
2039 if (flag_unwind_tables && !ACCUMULATE_OUTGOING_ARGS
2040 && flag_omit_frame_pointer)
2042 warning (0, "unwind tables currently require a frame pointer "
2044 flag_omit_frame_pointer = 0;
2048 /* This function can be called multiple times to reinitialize the compiler
2049 back end when register classes or instruction sets have changed,
2050 before each function. */
2052 backend_init_target (void)
2054 /* Initialize alignment variables. */
2057 /* This reinitializes hard_frame_pointer, and calls init_reg_modes_target()
2058 to initialize reg_raw_mode[]. */
2061 /* This invokes target hooks to set fixed_reg[] etc, which is
2065 /* This depends on stack_pointer_rtx. */
2066 init_fake_stack_mems ();
2068 /* Sets static_base_value[HARD_FRAME_POINTER_REGNUM], which is
2070 init_alias_target ();
2072 /* Depends on HARD_FRAME_POINTER_REGNUM. */
2075 /* The following initialization functions need to generate rtl, so
2076 provide a dummy function context for them. */
2077 init_dummy_function_start ();
2079 /* rtx_cost is mode-dependent, so cached values need to be recomputed
2080 on a mode change. */
2083 /* We may need to recompute regno_save_code[] and regno_restore_code[]
2084 after a mode change as well. */
2085 if (flag_caller_saves)
2086 init_caller_save ();
2087 expand_dummy_function_end ();
2090 /* Initialize the compiler back end. This function is called only once,
2091 when starting the compiler. */
2095 init_emit_once (debug_info_level == DINFO_LEVEL_NORMAL
2096 || debug_info_level == DINFO_LEVEL_VERBOSE
2097 #ifdef VMS_DEBUGGING_INFO
2098 /* Enable line number info for traceback. */
2099 || debug_info_level > DINFO_LEVEL_NONE
2101 || flag_test_coverage);
2104 init_inline_once ();
2105 init_varasm_once ();
2106 save_register_info ();
2108 /* Initialize the target-specific back end pieces. */
2110 backend_init_target ();
2113 /* Initialize excess precision settings. */
2115 init_excess_precision (void)
2117 /* Adjust excess precision handling based on the target options. If
2118 the front end cannot handle it, flag_excess_precision_cmdline
2119 will already have been set accordingly in the post_options
2121 gcc_assert (flag_excess_precision_cmdline != EXCESS_PRECISION_DEFAULT);
2122 flag_excess_precision = flag_excess_precision_cmdline;
2123 if (flag_unsafe_math_optimizations)
2124 flag_excess_precision = EXCESS_PRECISION_FAST;
2125 if (flag_excess_precision == EXCESS_PRECISION_STANDARD)
2127 int flt_eval_method = TARGET_FLT_EVAL_METHOD;
2128 switch (flt_eval_method)
2132 /* Either the target acts unpredictably (-1) or has all the
2133 operations required not to have excess precision (0). */
2134 flag_excess_precision = EXCESS_PRECISION_FAST;
2138 /* In these cases, predictable excess precision makes
2142 /* Any other implementation-defined FLT_EVAL_METHOD values
2143 require the compiler to handle the associated excess
2144 precision rules in excess_precision_type. */
2150 /* Initialize things that are both lang-dependent and target-dependent.
2151 This function can be called more than once if target parameters change. */
2153 lang_dependent_init_target (void)
2155 /* This determines excess precision settings. */
2156 init_excess_precision ();
2158 /* This creates various _DECL nodes, so needs to be called after the
2159 front end is initialized. It also depends on the HAVE_xxx macros
2160 generated from the target machine description. */
2163 /* The following initialization functions need to generate rtl, so
2164 provide a dummy function context for them. */
2165 init_dummy_function_start ();
2167 /* Do the target-specific parts of expr initialization. */
2168 init_expr_target ();
2170 /* Although the actions of these functions are language-independent,
2171 they use optabs, so we cannot call them from backend_init. */
2175 expand_dummy_function_end ();
2178 /* Language-dependent initialization. Returns nonzero on success. */
2180 lang_dependent_init (const char *name)
2182 location_t save_loc = input_location;
2183 if (dump_base_name == 0)
2184 dump_base_name = name && name[0] ? name : "gccdump";
2186 /* Other front-end initialization. */
2187 input_location = BUILTINS_LOCATION;
2188 if (lang_hooks.init () == 0)
2190 input_location = save_loc;
2192 init_asm_output (name);
2194 /* This creates various _DECL nodes, so needs to be called after the
2195 front end is initialized. */
2198 /* Do the target-specific parts of the initialization. */
2199 lang_dependent_init_target ();
2201 /* If dbx symbol table desired, initialize writing it and output the
2202 predefined types. */
2203 timevar_push (TV_SYMOUT);
2205 #if defined DWARF2_DEBUGGING_INFO || defined DWARF2_UNWIND_INFO
2206 if (dwarf2out_do_frame ())
2207 dwarf2out_frame_init ();
2210 /* Now we have the correct original filename, we can initialize
2212 (*debug_hooks->init) (name);
2214 timevar_pop (TV_SYMOUT);
2220 /* Reinitialize everything when target parameters, such as register usage,
2223 target_reinit (void)
2225 /* Reinitialize RTL backend. */
2226 backend_init_target ();
2228 /* Reinitialize lang-dependent parts. */
2229 lang_dependent_init_target ();
2233 dump_memory_report (bool final)
2235 ggc_print_statistics ();
2236 stringpool_statistics ();
2237 dump_tree_statistics ();
2238 dump_gimple_statistics ();
2239 dump_rtx_statistics ();
2240 dump_varray_statistics ();
2241 dump_alloc_pool_statistics ();
2242 dump_bitmap_statistics ();
2243 dump_vec_loc_statistics ();
2244 dump_ggc_loc_statistics (final);
2245 dump_alias_stats (stderr);
2246 dump_pta_stats (stderr);
2249 /* Clean up: close opened files, etc. */
2254 /* Close the dump files. */
2255 if (flag_gen_aux_info)
2257 fclose (aux_info_file);
2259 unlink (aux_info_file_name);
2262 /* Close non-debugging input and output files. Take special care to note
2263 whether fclose returns an error, since the pages might still be on the
2264 buffer chain while the file is open. */
2268 if (ferror (asm_out_file) != 0)
2269 fatal_error ("error writing to %s: %m", asm_file_name);
2270 if (fclose (asm_out_file) != 0)
2271 fatal_error ("error closing %s: %m", asm_file_name);
2275 finish_optimization_passes ();
2280 dump_memory_report (true);
2282 /* Language-specific end of compilation actions. */
2283 lang_hooks.finish ();
2286 /* Initialize the compiler, and compile the input file. */
2290 /* Initialize timing first. The C front ends read the main file in
2291 the post_options hook, and C++ does file timings. */
2292 if (time_report || !quiet_flag || flag_detailed_statistics)
2294 timevar_start (TV_TOTAL);
2298 /* Don't do any more if an error has already occurred. */
2301 /* This must be run always, because it is needed to compute the FP
2302 predefined macros, such as __LDBL_MAX__, for targets using non
2303 default FP formats. */
2304 init_adjust_machine_modes ();
2306 /* Set up the back-end if requested. */
2310 /* Language-dependent initialization. Returns true on success. */
2311 if (lang_dependent_init (main_input_filename))
2316 /* Invoke registered plugin callbacks. */
2317 invoke_plugin_callbacks (PLUGIN_FINISH_UNIT, NULL);
2320 /* Stop timing and print the times. */
2321 timevar_stop (TV_TOTAL);
2322 timevar_print (stderr);
2325 /* Entry point of cc1, cc1plus, jc1, f771, etc.
2326 Exit code is FATAL_EXIT_CODE if can't open files or if there were
2327 any errors, or SUCCESS_EXIT_CODE if compilation succeeded.
2329 It is not safe to call this function more than once. */
2332 toplev_main (int argc, char **argv)
2334 expandargv (&argc, &argv);
2336 save_argv = (const char **) argv;
2338 /* Initialization of GCC's environment, and diagnostics. */
2339 general_init (argv[0]);
2341 /* Parse the options and do minimal processing; basically just
2342 enough to default flags appropriately. */
2343 decode_options (argc, (const char **) argv);
2347 initialize_plugins ();
2350 print_version (stderr, "");
2353 print_plugins_help (stderr, "");
2355 /* Exit early if we can (e.g. -help). */
2356 if (!exit_after_options)
2359 if (warningcount || errorcount)
2360 print_ignored_options ();
2362 /* Invoke registered plugin callbacks if any. */
2363 invoke_plugin_callbacks (PLUGIN_FINISH, NULL);
2365 finalize_plugins ();
2366 if (errorcount || sorrycount)
2367 return (FATAL_EXIT_CODE);
2369 return (SUCCESS_EXIT_CODE);