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"
69 #include "dwarf2asm.h"
70 #include "integrate.h"
74 #include "langhooks.h"
75 #include "cfglayout.h"
77 #include "hosthooks.h"
81 #include "value-prof.h"
82 #include "alloc-pool.h"
83 #include "tree-mudflap.h"
84 #include "tree-pass.h"
86 #if defined (DWARF2_UNWIND_INFO) || defined (DWARF2_DEBUGGING_INFO)
87 #include "dwarf2out.h"
90 #if defined(DBX_DEBUGGING_INFO) || defined(XCOFF_DEBUGGING_INFO)
94 #ifdef SDB_DEBUGGING_INFO
98 #ifdef XCOFF_DEBUGGING_INFO
99 #include "xcoffout.h" /* Needed for external data
100 declarations for e.g. AIX 4.x. */
103 static void general_init (const char *);
104 static void do_compile (void);
105 static void process_options (void);
106 static void backend_init (void);
107 static int lang_dependent_init (const char *);
108 static void init_asm_output (const char *);
109 static void finalize (void);
111 static void crash_signal (int) ATTRIBUTE_NORETURN;
112 static void setup_core_dumping (void);
113 static void compile_file (void);
115 /* Nonzero to dump debug info whilst parsing (-dy option). */
116 static int set_yydebug;
118 /* True if we don't need a backend (e.g. preprocessing only). */
119 static bool no_backend;
121 /* Length of line when printing switch values. */
124 /* Name of program invoked, sans directories. */
126 const char *progname;
128 /* Copy of argument vector to toplev_main. */
129 static const char **save_argv;
131 /* Name of top-level original source file (what was input to cpp).
132 This comes from the #-command at the beginning of the actual input.
133 If there isn't any there, then this is the cc1 input file name. */
135 const char *main_input_filename;
137 /* Used to enable -fvar-tracking, -fweb and -frename-registers according
138 to optimize and default_debug_hooks in process_options (). */
139 #define AUTODETECT_VALUE 2
141 /* Current position in real source file. */
143 location_t input_location;
145 struct line_maps *line_table;
147 /* Stack of currently pending input files. */
149 struct file_stack *input_file_stack;
151 /* Incremented on each change to input_file_stack. */
152 int input_file_stack_tick;
154 /* Record of input_file_stack at each tick. */
155 typedef struct file_stack *fs_p;
157 DEF_VEC_ALLOC_P(fs_p,heap);
158 static VEC(fs_p,heap) *input_file_stack_history;
160 /* Whether input_file_stack has been restored to a previous state (in
161 which case there should be no more pushing). */
162 static bool input_file_stack_restored;
164 /* Name to use as base of names for dump output files. */
166 const char *dump_base_name;
168 /* Name to use as a base for auxiliary output files. */
170 const char *aux_base_name;
172 /* A mask of target_flags that includes bit X if X was set or cleared
173 on the command line. */
175 int target_flags_explicit;
177 /* Debug hooks - dependent upon command line options. */
179 const struct gcc_debug_hooks *debug_hooks;
181 /* Debug hooks - target default. */
183 static const struct gcc_debug_hooks *default_debug_hooks;
185 /* Other flags saying which kinds of debugging dump have been requested. */
187 int rtl_dump_and_exit;
188 int flag_print_asm_name;
189 enum graph_dump_types graph_dump_format;
191 /* Name for output file of assembly code, specified with -o. */
193 const char *asm_file_name;
195 /* Nonzero means do optimizations. -O.
196 Particular numeric values stand for particular amounts of optimization;
197 thus, -O2 stores 2 here. However, the optimizations beyond the basic
198 ones are not controlled directly by this variable. Instead, they are
199 controlled by individual `flag_...' variables that are defaulted
200 based on this variable. */
204 /* Nonzero means optimize for size. -Os.
205 The only valid values are zero and nonzero. When optimize_size is
206 nonzero, optimize defaults to 2, but certain individual code
207 bloating optimizations are disabled. */
209 int optimize_size = 0;
211 /* The FUNCTION_DECL for the function currently being compiled,
212 or 0 if between functions. */
213 tree current_function_decl;
215 /* Set to the FUNC_BEGIN label of the current function, or NULL
217 const char * current_function_func_begin_label;
219 /* Temporarily suppress certain warnings.
220 This is set while reading code from a system header file. */
222 int in_system_header = 0;
224 /* Nonzero means to collect statistics which might be expensive
225 and to print them when we are done. */
226 int flag_detailed_statistics = 0;
228 /* A random sequence of characters, unless overridden by user. */
229 static const char *flag_random_seed;
231 /* A local time stamp derived from the time of compilation. It will be
232 zero if the system cannot provide a time. It will be -1u, if the
233 user has specified a particular random seed. */
238 /* Nonzero means `char' should be signed. */
240 int flag_signed_char;
242 /* Nonzero means give an enum type only as many bytes as it needs. A value
243 of 2 means it has not yet been initialized. */
245 int flag_short_enums;
247 /* Nonzero if structures and unions should be returned in memory.
249 This should only be defined if compatibility with another compiler or
250 with an ABI is needed, because it results in slower code. */
252 #ifndef DEFAULT_PCC_STRUCT_RETURN
253 #define DEFAULT_PCC_STRUCT_RETURN 1
256 /* Nonzero for -fpcc-struct-return: return values the same way PCC does. */
258 int flag_pcc_struct_return = DEFAULT_PCC_STRUCT_RETURN;
260 /* 0 means straightforward implementation of complex divide acceptable.
261 1 means wide ranges of inputs must work for complex divide.
262 2 means C99-like requirements for complex multiply and divide. */
264 int flag_complex_method = 1;
266 /* Nonzero means that we don't want inlining by virtue of -fno-inline,
267 not just because the tree inliner turned us off. */
269 int flag_really_no_inline = 2;
271 /* Nonzero means we should be saving declaration info into a .X file. */
273 int flag_gen_aux_info = 0;
275 /* Specified name of aux-info file. */
277 const char *aux_info_file_name;
279 /* Nonzero if we are compiling code for a shared library, zero for
284 /* Generate code for GNU or NeXT Objective-C runtime environment. */
286 #ifdef NEXT_OBJC_RUNTIME
287 int flag_next_runtime = 1;
289 int flag_next_runtime = 0;
292 /* Set to the default thread-local storage (tls) model to use. */
294 enum tls_model flag_tls_default = TLS_MODEL_GLOBAL_DYNAMIC;
296 /* Nonzero means change certain warnings into errors.
297 Usually these are warnings about failure to conform to some standard. */
299 int flag_pedantic_errors = 0;
301 /* -dA causes debug commentary information to be produced in
302 the generated assembly code (to make it more readable). This option
303 is generally only of use to those who actually need to read the
304 generated assembly code (perhaps while debugging the compiler itself).
305 Currently, this switch is only used by dwarfout.c; however, it is intended
306 to be a catchall for printing debug information in the assembler file. */
308 int flag_debug_asm = 0;
310 /* -dP causes the rtl to be emitted as a comment in assembly. */
312 int flag_dump_rtl_in_asm = 0;
314 /* When non-NULL, indicates that whenever space is allocated on the
315 stack, the resulting stack pointer must not pass this
316 address---that is, for stacks that grow downward, the stack pointer
317 must always be greater than or equal to this address; for stacks
318 that grow upward, the stack pointer must be less than this address.
319 At present, the rtx may be either a REG or a SYMBOL_REF, although
320 the support provided depends on the backend. */
323 /* Nonzero if we should track variables. When
324 flag_var_tracking == AUTODETECT_VALUE it will be set according
325 to optimize, debug_info_level and debug_hooks in process_options (). */
326 int flag_var_tracking = AUTODETECT_VALUE;
328 /* True if the user has tagged the function with the 'section'
331 bool user_defined_section_attribute = false;
333 /* Values of the -falign-* flags: how much to align labels in code.
334 0 means `use default', 1 means `don't align'.
335 For each variable, there is an _log variant which is the power
336 of two not less than the variable, for .align output. */
339 int align_loops_max_skip;
341 int align_jumps_max_skip;
342 int align_labels_log;
343 int align_labels_max_skip;
344 int align_functions_log;
348 const char *const string;
352 lang_independent_options;
354 /* Nonzero if subexpressions must be evaluated from left-to-right. */
355 int flag_evaluation_order = 0;
357 /* The user symbol prefix after having resolved same. */
358 const char *user_label_prefix;
360 static const param_info lang_independent_params[] = {
361 #define DEFPARAM(ENUM, OPTION, HELP, DEFAULT, MIN, MAX) \
362 { OPTION, DEFAULT, false, MIN, MAX, HELP },
363 #include "params.def"
365 { NULL, 0, false, 0, 0, NULL }
368 /* Output files for assembler code (real compiler output)
369 and debugging dumps. */
373 FILE *dump_file = NULL;
374 const char *dump_file_name;
376 /* The current working directory of a translation. It's generally the
377 directory from which compilation was initiated, but a preprocessed
378 file may specify the original directory in which it was
381 static const char *src_pwd;
383 /* Initialize src_pwd with the given string, and return true. If it
384 was already initialized, return false. As a special case, it may
385 be called with a NULL argument to test whether src_pwd has NOT been
389 set_src_pwd (const char *pwd)
393 if (strcmp (src_pwd, pwd) == 0)
399 src_pwd = xstrdup (pwd);
403 /* Return the directory from which the translation unit was initiated,
404 in case set_src_pwd() was not called before to assign it a
420 /* Called when the start of a function definition is parsed,
421 this function prints on stderr the name of the function. */
423 announce_function (tree decl)
427 if (rtl_dump_and_exit)
428 fprintf (stderr, "%s ", IDENTIFIER_POINTER (DECL_NAME (decl)));
430 fprintf (stderr, " %s", lang_hooks.decl_printable_name (decl, 2));
432 pp_needs_newline (global_dc->printer) = true;
433 diagnostic_set_last_function (global_dc, (diagnostic_info *) NULL);
437 /* Initialize local_tick with the time of day, or -1 if
438 flag_random_seed is set. */
441 init_local_tick (void)
443 if (!flag_random_seed)
445 /* Get some more or less random data. */
446 #ifdef HAVE_GETTIMEOFDAY
450 gettimeofday (&tv, NULL);
451 local_tick = tv.tv_sec * 1000 + tv.tv_usec / 1000;
455 time_t now = time (NULL);
457 if (now != (time_t)-1)
458 local_tick = (unsigned) now;
466 /* Set up a default flag_random_seed and local_tick, unless the user
467 already specified one. Must be called after init_local_tick. */
470 init_random_seed (void)
472 unsigned HOST_WIDE_INT value;
473 static char random_seed[HOST_BITS_PER_WIDE_INT / 4 + 3];
475 value = local_tick ^ getpid ();
477 sprintf (random_seed, HOST_WIDE_INT_PRINT_HEX, value);
478 flag_random_seed = random_seed;
481 /* Obtain the random_seed string. Unless NOINIT, initialize it if
482 it's not provided in the command line. */
485 get_random_seed (bool noinit)
487 if (!flag_random_seed && !noinit)
489 return flag_random_seed;
492 /* Modify the random_seed string to VAL. Return its previous
496 set_random_seed (const char *val)
498 const char *old = flag_random_seed;
499 flag_random_seed = val;
503 /* Decode the string P as an integral parameter.
504 If the string is indeed an integer return its numeric value else
505 issue an Invalid Option error for the option PNAME and return DEFVAL.
506 If PNAME is zero just return DEFVAL, do not call error. */
509 read_integral_parameter (const char *p, const char *pname, const int defval)
511 const char *endp = p;
524 error ("invalid option argument %qs", pname);
531 /* When compiling with a recent enough GCC, we use the GNU C "extern inline"
532 for floor_log2 and exact_log2; see toplev.h. That construct, however,
533 conflicts with the ISO C++ One Definition Rule. */
535 #if GCC_VERSION < 3004 || !defined (__cplusplus)
537 /* Given X, an unsigned number, return the largest int Y such that 2**Y <= X.
538 If X is 0, return -1. */
541 floor_log2 (unsigned HOST_WIDE_INT x)
549 t = HOST_BITS_PER_WIDE_INT - 1 - (int) CLZ_HWI (x);
551 if (HOST_BITS_PER_WIDE_INT > 64)
552 if (x >= (unsigned HOST_WIDE_INT) 1 << (t + 64))
554 if (HOST_BITS_PER_WIDE_INT > 32)
555 if (x >= ((unsigned HOST_WIDE_INT) 1) << (t + 32))
557 if (x >= ((unsigned HOST_WIDE_INT) 1) << (t + 16))
559 if (x >= ((unsigned HOST_WIDE_INT) 1) << (t + 8))
561 if (x >= ((unsigned HOST_WIDE_INT) 1) << (t + 4))
563 if (x >= ((unsigned HOST_WIDE_INT) 1) << (t + 2))
565 if (x >= ((unsigned HOST_WIDE_INT) 1) << (t + 1))
572 /* Return the logarithm of X, base 2, considering X unsigned,
573 if X is a power of 2. Otherwise, returns -1. */
576 exact_log2 (unsigned HOST_WIDE_INT x)
581 return x ? CTZ_HWI (x) : -1;
583 return floor_log2 (x);
587 #endif /* GCC_VERSION < 3004 || !defined (__cplusplus) */
589 /* Handler for fatal signals, such as SIGSEGV. These are transformed
590 into ICE messages, which is much more user friendly. In case the
591 error printer crashes, reset the signal to prevent infinite recursion. */
594 crash_signal (int signo)
596 signal (signo, SIG_DFL);
598 /* If we crashed while processing an ASM statement, then be a little more
599 graceful. It's most likely the user's fault. */
600 if (this_is_asm_operands)
602 output_operand_lossage ("unrecoverable error");
603 exit (FATAL_EXIT_CODE);
606 internal_error ("%s", strsignal (signo));
609 /* Arrange to dump core on error. (The regular error message is still
610 printed first, except in the case of abort().) */
613 setup_core_dumping (void)
616 signal (SIGABRT, SIG_DFL);
618 #if defined(HAVE_SETRLIMIT)
621 if (getrlimit (RLIMIT_CORE, &rlim) != 0)
622 fatal_error ("getting core file size maximum limit: %m");
623 rlim.rlim_cur = rlim.rlim_max;
624 if (setrlimit (RLIMIT_CORE, &rlim) != 0)
625 fatal_error ("setting core file size limit to maximum: %m");
628 diagnostic_abort_on_error (global_dc);
632 /* Strip off a legitimate source ending from the input string NAME of
633 length LEN. Rather than having to know the names used by all of
634 our front ends, we strip off an ending of a period followed by
635 up to five characters. (Java uses ".class".) */
638 strip_off_ending (char *name, int len)
641 for (i = 2; i < 6 && len > i; i++)
643 if (name[len - i] == '.')
645 name[len - i] = '\0';
651 /* Output a quoted string. */
654 output_quoted_string (FILE *asm_file, const char *string)
656 #ifdef OUTPUT_QUOTED_STRING
657 OUTPUT_QUOTED_STRING (asm_file, string);
661 putc ('\"', asm_file);
662 while ((c = *string++) != 0)
666 if (c == '\"' || c == '\\')
667 putc ('\\', asm_file);
671 fprintf (asm_file, "\\%03o", (unsigned char) c);
673 putc ('\"', asm_file);
677 /* Output a file name in the form wanted by System V. */
680 output_file_directive (FILE *asm_file, const char *input_name)
685 if (input_name == NULL)
686 input_name = "<stdin>";
688 input_name = remap_debug_filename (input_name);
690 len = strlen (input_name);
691 na = input_name + len;
693 /* NA gets INPUT_NAME sans directory names. */
694 while (na > input_name)
696 if (IS_DIR_SEPARATOR (na[-1]))
701 #ifdef ASM_OUTPUT_SOURCE_FILENAME
702 ASM_OUTPUT_SOURCE_FILENAME (asm_file, na);
704 fprintf (asm_file, "\t.file\t");
705 output_quoted_string (asm_file, na);
706 fputc ('\n', asm_file);
710 /* A subroutine of wrapup_global_declarations. We've come to the end of
711 the compilation unit. All deferred variables should be undeferred,
712 and all incomplete decls should be finalized. */
715 wrapup_global_declaration_1 (tree decl)
717 /* We're not deferring this any longer. Assignment is conditional to
718 avoid needlessly dirtying PCH pages. */
719 if (CODE_CONTAINS_STRUCT (TREE_CODE (decl), TS_DECL_WITH_VIS)
720 && DECL_DEFER_OUTPUT (decl) != 0)
721 DECL_DEFER_OUTPUT (decl) = 0;
723 if (TREE_CODE (decl) == VAR_DECL && DECL_SIZE (decl) == 0)
724 lang_hooks.finish_incomplete_decl (decl);
727 /* A subroutine of wrapup_global_declarations. Decide whether or not DECL
728 needs to be output. Return true if it is output. */
731 wrapup_global_declaration_2 (tree decl)
733 if (TREE_ASM_WRITTEN (decl) || DECL_EXTERNAL (decl))
736 /* Don't write out static consts, unless we still need them.
738 We also keep static consts if not optimizing (for debugging),
739 unless the user specified -fno-keep-static-consts.
740 ??? They might be better written into the debug information.
741 This is possible when using DWARF.
743 A language processor that wants static constants to be always
744 written out (even if it is not used) is responsible for
745 calling rest_of_decl_compilation itself. E.g. the C front-end
746 calls rest_of_decl_compilation from finish_decl.
747 One motivation for this is that is conventional in some
748 environments to write things like:
749 static const char rcsid[] = "... version string ...";
750 intending to force the string to be in the executable.
752 A language processor that would prefer to have unneeded
753 static constants "optimized away" would just defer writing
754 them out until here. E.g. C++ does this, because static
755 constants are often defined in header files.
757 ??? A tempting alternative (for both C and C++) would be
758 to force a constant to be written if and only if it is
759 defined in a main file, as opposed to an include file. */
761 if (TREE_CODE (decl) == VAR_DECL && TREE_STATIC (decl))
763 struct varpool_node *node;
765 node = varpool_node (decl);
769 else if (node->alias)
771 else if (!cgraph_global_info_ready
773 || TREE_USED (DECL_ASSEMBLER_NAME (decl))))
775 else if (node->needed)
777 else if (DECL_COMDAT (decl))
779 else if (TREE_READONLY (decl) && !TREE_PUBLIC (decl)
780 && (optimize || !flag_keep_static_consts
781 || DECL_ARTIFICIAL (decl)))
786 rest_of_decl_compilation (decl, 1, 1);
794 /* Do any final processing required for the declarations in VEC, of
795 which there are LEN. We write out inline functions and variables
796 that have been deferred until this point, but which are required.
797 Returns nonzero if anything was put out. */
800 wrapup_global_declarations (tree *vec, int len)
802 bool reconsider, output_something = false;
805 for (i = 0; i < len; i++)
806 wrapup_global_declaration_1 (vec[i]);
808 /* Now emit any global variables or functions that we have been
809 putting off. We need to loop in case one of the things emitted
810 here references another one which comes earlier in the list. */
814 for (i = 0; i < len; i++)
815 reconsider |= wrapup_global_declaration_2 (vec[i]);
817 output_something = true;
821 return output_something;
824 /* A subroutine of check_global_declarations. Issue appropriate warnings
825 for the global declaration DECL. */
828 check_global_declaration_1 (tree decl)
830 /* Warn about any function declared static but not defined. We don't
831 warn about variables, because many programs have static variables
832 that exist only to get some text into the object file. */
833 if (TREE_CODE (decl) == FUNCTION_DECL
834 && DECL_INITIAL (decl) == 0
835 && DECL_EXTERNAL (decl)
836 && ! DECL_ARTIFICIAL (decl)
837 && ! TREE_NO_WARNING (decl)
838 && ! TREE_PUBLIC (decl)
839 && (warn_unused_function
840 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl))))
842 if (TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl)))
843 pedwarn ("%q+F used but never defined", decl);
845 warning (OPT_Wunused_function, "%q+F declared %<static%> but never defined", decl);
846 /* This symbol is effectively an "extern" declaration now. */
847 TREE_PUBLIC (decl) = 1;
848 assemble_external (decl);
851 /* Warn about static fns or vars defined but not used. */
852 if (((warn_unused_function && TREE_CODE (decl) == FUNCTION_DECL)
853 /* We don't warn about "static const" variables because the
854 "rcs_id" idiom uses that construction. */
855 || (warn_unused_variable
856 && TREE_CODE (decl) == VAR_DECL && ! TREE_READONLY (decl)))
857 && ! DECL_IN_SYSTEM_HEADER (decl)
858 && ! TREE_USED (decl)
859 /* The TREE_USED bit for file-scope decls is kept in the identifier,
860 to handle multiple external decls in different scopes. */
861 && ! (DECL_NAME (decl) && TREE_USED (DECL_NAME (decl)))
862 && ! DECL_EXTERNAL (decl)
863 && ! TREE_PUBLIC (decl)
864 /* A volatile variable might be used in some non-obvious way. */
865 && ! TREE_THIS_VOLATILE (decl)
866 /* Global register variables must be declared to reserve them. */
867 && ! (TREE_CODE (decl) == VAR_DECL && DECL_REGISTER (decl))
868 /* Otherwise, ask the language. */
869 && lang_hooks.decls.warn_unused_global (decl))
870 warning ((TREE_CODE (decl) == FUNCTION_DECL)
871 ? OPT_Wunused_function
872 : OPT_Wunused_variable,
873 "%q+D defined but not used", decl);
876 /* Issue appropriate warnings for the global declarations in VEC (of
877 which there are LEN). */
880 check_global_declarations (tree *vec, int len)
884 for (i = 0; i < len; i++)
885 check_global_declaration_1 (vec[i]);
888 /* Emit debugging information for all global declarations in VEC. */
891 emit_debug_global_declarations (tree *vec, int len)
895 /* Avoid confusing the debug information machinery when there are errors. */
896 if (errorcount != 0 || sorrycount != 0)
899 timevar_push (TV_SYMOUT);
900 for (i = 0; i < len; i++)
901 debug_hooks->global_decl (vec[i]);
902 timevar_pop (TV_SYMOUT);
905 /* Warn about a use of an identifier which was marked deprecated. */
907 warn_deprecated_use (tree node)
909 if (node == 0 || !warn_deprecated_decl)
914 expanded_location xloc = expand_location (DECL_SOURCE_LOCATION (node));
915 warning (OPT_Wdeprecated_declarations,
916 "%qD is deprecated (declared at %s:%d)",
917 node, xloc.file, xloc.line);
919 else if (TYPE_P (node))
921 const char *what = NULL;
922 tree decl = TYPE_STUB_DECL (node);
924 if (TYPE_NAME (node))
926 if (TREE_CODE (TYPE_NAME (node)) == IDENTIFIER_NODE)
927 what = IDENTIFIER_POINTER (TYPE_NAME (node));
928 else if (TREE_CODE (TYPE_NAME (node)) == TYPE_DECL
929 && DECL_NAME (TYPE_NAME (node)))
930 what = IDENTIFIER_POINTER (DECL_NAME (TYPE_NAME (node)));
935 expanded_location xloc
936 = expand_location (DECL_SOURCE_LOCATION (decl));
938 warning (OPT_Wdeprecated_declarations,
939 "%qs is deprecated (declared at %s:%d)", what,
940 xloc.file, xloc.line);
942 warning (OPT_Wdeprecated_declarations,
943 "type is deprecated (declared at %s:%d)",
944 xloc.file, xloc.line);
949 warning (OPT_Wdeprecated_declarations, "%qs is deprecated", what);
951 warning (OPT_Wdeprecated_declarations, "type is deprecated");
956 /* Save the current INPUT_LOCATION on the top entry in the
957 INPUT_FILE_STACK. Push a new entry for FILE and LINE, and set the
958 INPUT_LOCATION accordingly. */
961 push_srcloc (location_t fline)
963 struct file_stack *fs;
965 gcc_assert (!input_file_stack_restored);
966 if (input_file_stack_tick == (int) ((1U << INPUT_FILE_STACK_BITS) - 1))
967 sorry ("GCC supports only %d input file changes", input_file_stack_tick);
969 fs = XNEW (struct file_stack);
970 fs->location = input_location;
971 fs->next = input_file_stack;
972 input_location = fline;
973 input_file_stack = fs;
974 input_file_stack_tick++;
975 VEC_safe_push (fs_p, heap, input_file_stack_history, input_file_stack);
978 /* Pop the top entry off the stack of presently open source files.
979 Restore the INPUT_LOCATION from the new topmost entry on the
985 struct file_stack *fs;
987 gcc_assert (!input_file_stack_restored);
988 if (input_file_stack_tick == (int) ((1U << INPUT_FILE_STACK_BITS) - 1))
989 sorry ("GCC supports only %d input file changes", input_file_stack_tick);
991 fs = input_file_stack;
992 input_location = fs->location;
993 input_file_stack = fs->next;
994 input_file_stack_tick++;
995 VEC_safe_push (fs_p, heap, input_file_stack_history, input_file_stack);
998 /* Restore the input file stack to its state as of TICK, for the sake
999 of diagnostics after processing the whole input. Once this has
1000 been called, push_srcloc and pop_srcloc may no longer be
1003 restore_input_file_stack (int tick)
1006 input_file_stack = NULL;
1008 input_file_stack = VEC_index (fs_p, input_file_stack_history, tick - 1);
1009 input_file_stack_tick = tick;
1010 input_file_stack_restored = true;
1013 /* Compile an entire translation unit. Write a file of assembly
1014 output and various debugging dumps. */
1019 /* Initialize yet another pass. */
1022 init_final (main_input_filename);
1023 coverage_init (aux_base_name);
1025 timevar_push (TV_PARSE);
1027 /* Call the parser, which parses the entire file (calling
1028 rest_of_compilation for each function). */
1029 lang_hooks.parse_file (set_yydebug);
1031 /* In case there were missing block closers,
1032 get us back to the global binding level. */
1033 lang_hooks.clear_binding_stack ();
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 lang_hooks.decls.final_write_globals ();
1044 if (errorcount || sorrycount)
1047 varpool_assemble_pending_decls ();
1048 finish_aliases_2 ();
1050 /* This must occur after the loop to output deferred functions.
1051 Else the coverage initializer would not be emitted if all the
1052 functions in this compilation unit were deferred. */
1055 /* Likewise for mudflap static object registrations. */
1057 mudflap_finish_file ();
1059 /* Likewise for emulated thread-local storage. */
1060 if (!targetm.have_tls)
1063 output_shared_constant_pool ();
1064 output_object_blocks ();
1066 /* Write out any pending weak symbol declarations. */
1069 /* Do dbx symbols. */
1070 timevar_push (TV_SYMOUT);
1072 #if defined DWARF2_DEBUGGING_INFO || defined DWARF2_UNWIND_INFO
1073 if (dwarf2out_do_frame ())
1074 dwarf2out_frame_finish ();
1077 (*debug_hooks->finish) (main_input_filename);
1078 timevar_pop (TV_SYMOUT);
1080 /* Output some stuff at end of file if nec. */
1082 dw2_output_indirect_constants ();
1084 /* Flush any pending external directives. */
1085 process_pending_assemble_externals ();
1087 /* Attach a special .ident directive to the end of the file to identify
1088 the version of GCC which compiled this code. The format of the .ident
1089 string is patterned after the ones produced by native SVR4 compilers. */
1093 const char *pkg_version = "(GNU) ";
1095 if (strcmp ("(GCC) ", pkgversion_string))
1096 pkg_version = pkgversion_string;
1097 fprintf (asm_out_file, "%s\"GCC: %s%s\"\n",
1098 IDENT_ASM_OP, pkg_version, version_string);
1102 /* This must be at the end. Some target ports emit end of file directives
1103 into the assembly file here, and hence we can not output anything to the
1104 assembly file after this point. */
1105 targetm.asm_out.file_end ();
1108 /* Parse a -d... command line switch. */
1111 decode_d_option (const char *arg)
1122 flag_print_asm_name = 1;
1125 flag_dump_rtl_in_asm = 1;
1126 flag_print_asm_name = 1;
1129 graph_dump_format = vcg;
1132 rtl_dump_and_exit = 1;
1137 case 'D': /* These are handled by the preprocessor. */
1141 setup_core_dumping();
1146 if (!enable_rtl_dump_file (c))
1147 warning (0, "unrecognized gcc debugging option: %c", c);
1152 /* Indexed by enum debug_info_type. */
1153 const char *const debug_type_names[] =
1155 "none", "stabs", "coff", "dwarf-2", "xcoff", "vms"
1158 /* Print version information to FILE.
1159 Each line begins with INDENT (for the case where FILE is the
1160 assembler output file). */
1163 print_version (FILE *file, const char *indent)
1165 static const char fmt1[] =
1167 N_("%s%s%s %sversion %s (%s)\n%s\tcompiled by GNU C version %s, ")
1169 N_("%s%s%s %sversion %s (%s) compiled by CC, ")
1172 static const char fmt2[] =
1173 N_("GMP version %s, MPFR version %s.\n");
1174 static const char fmt3[] =
1175 N_("%s%swarning: %s header version %s differs from library version %s.\n");
1176 static const char fmt4[] =
1177 N_("%s%sGGC heuristics: --param ggc-min-expand=%d --param ggc-min-heapsize=%d\n");
1179 #define __VERSION__ "[?]"
1182 file == stderr ? _(fmt1) : fmt1,
1183 indent, *indent != 0 ? " " : "",
1184 lang_hooks.name, pkgversion_string, version_string, TARGET_NAME,
1185 indent, __VERSION__);
1187 /* We need to stringify the GMP macro values. Ugh, gmp_version has
1188 two string formats, "i.j.k" and "i.j" when k is zero. */
1189 #define GCC_GMP_STRINGIFY_VERSION3(X) #X
1190 #define GCC_GMP_STRINGIFY_VERSION2(X) GCC_GMP_STRINGIFY_VERSION3(X)
1191 #if __GNU_MP_VERSION_PATCHLEVEL == 0
1192 #define GCC_GMP_STRINGIFY_VERSION GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION) "." \
1193 GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION_MINOR)
1195 #define GCC_GMP_STRINGIFY_VERSION GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION) "." \
1196 GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION_MINOR) "." \
1197 GCC_GMP_STRINGIFY_VERSION2(__GNU_MP_VERSION_PATCHLEVEL)
1200 file == stderr ? _(fmt2) : fmt2,
1201 GCC_GMP_STRINGIFY_VERSION, MPFR_VERSION_STRING);
1202 if (strcmp (GCC_GMP_STRINGIFY_VERSION, gmp_version))
1204 file == stderr ? _(fmt3) : fmt3,
1205 indent, *indent != 0 ? " " : "",
1206 "GMP", GCC_GMP_STRINGIFY_VERSION, gmp_version);
1207 if (strcmp (MPFR_VERSION_STRING, mpfr_get_version ()))
1209 file == stderr ? _(fmt3) : fmt3,
1210 indent, *indent != 0 ? " " : "",
1211 "MPFR", MPFR_VERSION_STRING, mpfr_get_version ());
1213 file == stderr ? _(fmt4) : fmt4,
1214 indent, *indent != 0 ? " " : "",
1215 PARAM_VALUE (GGC_MIN_EXPAND), PARAM_VALUE (GGC_MIN_HEAPSIZE));
1218 #ifdef ASM_COMMENT_START
1220 print_to_asm_out_file (print_switch_type type, const char * text)
1222 bool prepend_sep = true;
1226 case SWITCH_TYPE_LINE_END:
1227 putc ('\n', asm_out_file);
1230 case SWITCH_TYPE_LINE_START:
1231 fputs (ASM_COMMENT_START, asm_out_file);
1232 return strlen (ASM_COMMENT_START);
1234 case SWITCH_TYPE_DESCRIPTIVE:
1235 if (ASM_COMMENT_START[0] == 0)
1236 prepend_sep = false;
1238 case SWITCH_TYPE_PASSED:
1239 case SWITCH_TYPE_ENABLED:
1241 fputc (' ', asm_out_file);
1242 fprintf (asm_out_file, text);
1243 /* No need to return the length here as
1244 print_single_switch has already done it. */
1254 print_to_stderr (print_switch_type type, const char * text)
1258 case SWITCH_TYPE_LINE_END:
1259 putc ('\n', stderr);
1262 case SWITCH_TYPE_LINE_START:
1265 case SWITCH_TYPE_PASSED:
1266 case SWITCH_TYPE_ENABLED:
1267 fputc (' ', stderr);
1270 case SWITCH_TYPE_DESCRIPTIVE:
1271 fprintf (stderr, text);
1272 /* No need to return the length here as
1273 print_single_switch has already done it. */
1281 /* Print an option value and return the adjusted position in the line.
1282 ??? print_fn doesn't handle errors, eg disk full; presumably other
1283 code will catch a disk full though. */
1286 print_single_switch (print_switch_fn_type print_fn,
1288 print_switch_type type,
1291 /* The ultrix fprintf returns 0 on success, so compute the result
1292 we want here since we need it for the following test. The +1
1293 is for the separator character that will probably be emitted. */
1294 int len = strlen (text) + 1;
1297 && pos + len > MAX_LINE)
1299 print_fn (SWITCH_TYPE_LINE_END, NULL);
1304 pos += print_fn (SWITCH_TYPE_LINE_START, NULL);
1306 print_fn (type, text);
1310 /* Print active target switches using PRINT_FN.
1311 POS is the current cursor position and MAX is the size of a "line".
1312 Each line begins with INDENT and ends with TERM.
1313 Each switch is separated from the next by SEP. */
1316 print_switch_values (print_switch_fn_type print_fn)
1322 /* Fill in the -frandom-seed option, if the user didn't pass it, so
1323 that it can be printed below. This helps reproducibility. */
1324 if (!flag_random_seed)
1325 init_random_seed ();
1327 /* Print the options as passed. */
1328 pos = print_single_switch (print_fn, pos,
1329 SWITCH_TYPE_DESCRIPTIVE, _("options passed: "));
1331 for (p = &save_argv[1]; *p != NULL; p++)
1336 if (strcmp (*p, "-o") == 0
1337 || strcmp (*p, "-dumpbase") == 0
1338 || strcmp (*p, "-auxbase") == 0)
1345 if (strcmp (*p, "-quiet") == 0
1346 || strcmp (*p, "-version") == 0)
1353 pos = print_single_switch (print_fn, pos, SWITCH_TYPE_PASSED, *p);
1357 print_fn (SWITCH_TYPE_LINE_END, NULL);
1359 /* Print the -f and -m options that have been enabled.
1360 We don't handle language specific options but printing argv
1362 pos = print_single_switch (print_fn, 0,
1363 SWITCH_TYPE_DESCRIPTIVE, _("options enabled: "));
1365 for (j = 0; j < cl_options_count; j++)
1366 if ((cl_options[j].flags & CL_REPORT)
1367 && option_enabled (j) > 0)
1368 pos = print_single_switch (print_fn, pos,
1369 SWITCH_TYPE_ENABLED, cl_options[j].opt_text);
1371 print_fn (SWITCH_TYPE_LINE_END, NULL);
1374 /* Open assembly code output file. Do this even if -fsyntax-only is
1375 on, because then the driver will have provided the name of a
1376 temporary file or bit bucket for us. NAME is the file specified on
1377 the command line, possibly NULL. */
1379 init_asm_output (const char *name)
1381 if (name == NULL && asm_file_name == 0)
1382 asm_out_file = stdout;
1385 if (asm_file_name == 0)
1387 int len = strlen (dump_base_name);
1388 char *dumpname = XNEWVEC (char, len + 6);
1390 memcpy (dumpname, dump_base_name, len + 1);
1391 strip_off_ending (dumpname, len);
1392 strcat (dumpname, ".s");
1393 asm_file_name = dumpname;
1395 if (!strcmp (asm_file_name, "-"))
1396 asm_out_file = stdout;
1398 asm_out_file = fopen (asm_file_name, "w+b");
1399 if (asm_out_file == 0)
1400 fatal_error ("can%'t open %s for writing: %m", asm_file_name);
1403 if (!flag_syntax_only)
1405 targetm.asm_out.file_start ();
1407 if (flag_record_gcc_switches)
1409 if (targetm.asm_out.record_gcc_switches)
1411 /* Let the target know that we are about to start recording. */
1412 targetm.asm_out.record_gcc_switches (SWITCH_TYPE_DESCRIPTIVE,
1414 /* Now record the switches. */
1415 print_switch_values (targetm.asm_out.record_gcc_switches);
1416 /* Let the target know that the recording is over. */
1417 targetm.asm_out.record_gcc_switches (SWITCH_TYPE_DESCRIPTIVE,
1421 inform ("-frecord-gcc-switches is not supported by the current target");
1424 #ifdef ASM_COMMENT_START
1425 if (flag_verbose_asm)
1427 /* Print the list of switches in effect
1428 into the assembler file as comments. */
1429 print_version (asm_out_file, ASM_COMMENT_START);
1430 print_switch_values (print_to_asm_out_file);
1431 fprintf (asm_out_file, "\n");
1437 /* Return true if the state of option OPTION should be stored in PCH files
1438 and checked by default_pch_valid_p. Store the option's current state
1442 option_affects_pch_p (int option, struct cl_option_state *state)
1444 if ((cl_options[option].flags & CL_TARGET) == 0)
1446 if (cl_options[option].flag_var == &target_flags)
1447 if (targetm.check_pch_target_flags)
1449 return get_option_state (option, state);
1452 /* Default version of get_pch_validity.
1453 By default, every flag difference is fatal; that will be mostly right for
1454 most targets, but completely right for very few. */
1457 default_get_pch_validity (size_t *len)
1459 struct cl_option_state state;
1464 if (targetm.check_pch_target_flags)
1465 *len += sizeof (target_flags);
1466 for (i = 0; i < cl_options_count; i++)
1467 if (option_affects_pch_p (i, &state))
1470 result = r = XNEWVEC (char, *len);
1474 if (targetm.check_pch_target_flags)
1476 memcpy (r, &target_flags, sizeof (target_flags));
1477 r += sizeof (target_flags);
1480 for (i = 0; i < cl_options_count; i++)
1481 if (option_affects_pch_p (i, &state))
1483 memcpy (r, state.data, state.size);
1490 /* Return a message which says that a PCH file was created with a different
1491 setting of OPTION. */
1494 pch_option_mismatch (const char *option)
1498 asprintf (&r, _("created and used with differing settings of '%s'"), option);
1500 return _("out of memory");
1504 /* Default version of pch_valid_p. */
1507 default_pch_valid_p (const void *data_p, size_t len)
1509 struct cl_option_state state;
1510 const char *data = (const char *)data_p;
1513 /* -fpic and -fpie also usually make a PCH invalid. */
1514 if (data[0] != flag_pic)
1515 return _("created and used with different settings of -fpic");
1516 if (data[1] != flag_pie)
1517 return _("created and used with different settings of -fpie");
1520 /* Check target_flags. */
1521 if (targetm.check_pch_target_flags)
1526 memcpy (&tf, data, sizeof (target_flags));
1527 data += sizeof (target_flags);
1528 len -= sizeof (target_flags);
1529 r = targetm.check_pch_target_flags (tf);
1534 for (i = 0; i < cl_options_count; i++)
1535 if (option_affects_pch_p (i, &state))
1537 if (memcmp (data, state.data, state.size) != 0)
1538 return pch_option_mismatch (cl_options[i].opt_text);
1546 /* Default tree printer. Handles declarations only. */
1548 default_tree_printer (pretty_printer * pp, text_info *text, const char *spec,
1549 int precision, bool wide, bool set_locus, bool hash)
1553 /* FUTURE: %+x should set the locus. */
1554 if (precision != 0 || wide || hash)
1560 t = va_arg (*text->args_ptr, tree);
1561 if (DECL_DEBUG_EXPR_IS_FROM (t) && DECL_DEBUG_EXPR (t))
1562 t = DECL_DEBUG_EXPR (t);
1567 t = va_arg (*text->args_ptr, tree);
1574 if (set_locus && text->locus)
1575 *text->locus = DECL_SOURCE_LOCATION (t);
1579 const char *n = DECL_NAME (t)
1580 ? lang_hooks.decl_printable_name (t, 2)
1585 dump_generic_node (pp, t, 0, TDF_DIAGNOSTIC, 0);
1590 /* A helper function; used as the reallocator function for cpp's line
1593 realloc_for_line_map (void *ptr, size_t len)
1595 return ggc_realloc (ptr, len);
1598 /* Initialization of the front end environment, before command line
1599 options are parsed. Signal handlers, internationalization etc.
1600 ARGV0 is main's argv[0]. */
1602 general_init (const char *argv0)
1606 p = argv0 + strlen (argv0);
1607 while (p != argv0 && !IS_DIR_SEPARATOR (p[-1]))
1611 xmalloc_set_program_name (progname);
1615 /* Unlock the stdio streams. */
1616 unlock_std_streams ();
1618 gcc_init_libintl ();
1620 /* Initialize the diagnostics reporting machinery, so option parsing
1621 can give warnings and errors. */
1622 diagnostic_initialize (global_dc);
1623 /* Set a default printer. Language specific initializations will
1624 override it later. */
1625 pp_format_decoder (global_dc->printer) = &default_tree_printer;
1627 /* Trap fatal signals, e.g. SIGSEGV, and convert them to ICE messages. */
1629 signal (SIGSEGV, crash_signal);
1632 signal (SIGILL, crash_signal);
1635 signal (SIGBUS, crash_signal);
1638 signal (SIGABRT, crash_signal);
1640 #if defined SIGIOT && (!defined SIGABRT || SIGABRT != SIGIOT)
1641 signal (SIGIOT, crash_signal);
1644 signal (SIGFPE, crash_signal);
1647 /* Other host-specific signal setup. */
1648 (*host_hooks.extra_signals)();
1650 /* Initialize the garbage-collector, string pools and tree type hash
1654 line_table = GGC_NEW (struct line_maps);
1655 linemap_init (line_table);
1656 line_table->reallocator = realloc_for_line_map;
1659 /* Initialize register usage now so switches may override. */
1662 /* Register the language-independent parameters. */
1663 add_params (lang_independent_params, LAST_PARAM);
1665 /* This must be done after add_params but before argument processing. */
1666 init_ggc_heuristics();
1667 init_optimization_passes ();
1670 /* Return true if the current target supports -fsection-anchors. */
1673 target_supports_section_anchors_p (void)
1675 if (targetm.min_anchor_offset == 0 && targetm.max_anchor_offset == 0)
1678 if (targetm.asm_out.output_anchor == NULL)
1684 /* Default the align_* variables to 1 if they're still unset, and
1685 set up the align_*_log variables. */
1687 init_alignments (void)
1689 if (align_loops <= 0)
1691 if (align_loops_max_skip > align_loops)
1692 align_loops_max_skip = align_loops - 1;
1693 align_loops_log = floor_log2 (align_loops * 2 - 1);
1694 if (align_jumps <= 0)
1696 if (align_jumps_max_skip > align_jumps)
1697 align_jumps_max_skip = align_jumps - 1;
1698 align_jumps_log = floor_log2 (align_jumps * 2 - 1);
1699 if (align_labels <= 0)
1701 align_labels_log = floor_log2 (align_labels * 2 - 1);
1702 if (align_labels_max_skip > align_labels)
1703 align_labels_max_skip = align_labels - 1;
1704 if (align_functions <= 0)
1705 align_functions = 1;
1706 align_functions_log = floor_log2 (align_functions * 2 - 1);
1709 /* Process the options that have been parsed. */
1711 process_options (void)
1713 /* Just in case lang_hooks.post_options ends up calling a debug_hook.
1714 This can happen with incorrect pre-processed input. */
1715 debug_hooks = &do_nothing_debug_hooks;
1717 /* Allow the front end to perform consistency checks and do further
1718 initialization based on the command line options. This hook also
1719 sets the original filename if appropriate (e.g. foo.i -> foo.c)
1720 so we can correctly initialize debug output. */
1721 no_backend = lang_hooks.post_options (&main_input_filename);
1723 #ifdef OVERRIDE_OPTIONS
1724 /* Some machines may reject certain combinations of options. */
1728 if (flag_section_anchors && !target_supports_section_anchors_p ())
1730 warning (OPT_fsection_anchors,
1731 "this target does not support %qs", "-fsection-anchors");
1732 flag_section_anchors = 0;
1735 if (flag_short_enums == 2)
1736 flag_short_enums = targetm.default_short_enums ();
1738 /* Set aux_base_name if not already set. */
1741 else if (main_input_filename)
1743 char *name = xstrdup (lbasename (main_input_filename));
1745 strip_off_ending (name, strlen (name));
1746 aux_base_name = name;
1749 aux_base_name = "gccaux";
1751 /* Unrolling all loops implies that standard loop unrolling must also
1753 if (flag_unroll_all_loops)
1754 flag_unroll_loops = 1;
1756 /* The loop unrolling code assumes that cse will be run after loop.
1757 web and rename-registers also help when run after loop unrolling. */
1759 if (flag_rerun_cse_after_loop == AUTODETECT_VALUE)
1760 flag_rerun_cse_after_loop = flag_unroll_loops || flag_peel_loops;
1761 if (flag_web == AUTODETECT_VALUE)
1762 flag_web = flag_unroll_loops || flag_peel_loops;
1763 if (flag_rename_registers == AUTODETECT_VALUE)
1764 flag_rename_registers = flag_unroll_loops || flag_peel_loops;
1766 if (flag_non_call_exceptions)
1767 flag_asynchronous_unwind_tables = 1;
1768 if (flag_asynchronous_unwind_tables)
1769 flag_unwind_tables = 1;
1771 if (!flag_unit_at_a_time)
1772 flag_section_anchors = 0;
1774 if (flag_value_profile_transformations)
1775 flag_profile_values = 1;
1777 /* Warn about options that are not supported on this machine. */
1778 #ifndef INSN_SCHEDULING
1779 if (flag_schedule_insns || flag_schedule_insns_after_reload)
1780 warning (0, "instruction scheduling not supported on this target machine");
1783 if (flag_delayed_branch)
1784 warning (0, "this target machine does not have delayed branches");
1787 user_label_prefix = USER_LABEL_PREFIX;
1788 if (flag_leading_underscore != -1)
1790 /* If the default prefix is more complicated than "" or "_",
1791 issue a warning and ignore this option. */
1792 if (user_label_prefix[0] == 0 ||
1793 (user_label_prefix[0] == '_' && user_label_prefix[1] == 0))
1795 user_label_prefix = flag_leading_underscore ? "_" : "";
1798 warning (0, "-f%sleading-underscore not supported on this target machine",
1799 flag_leading_underscore ? "" : "no-");
1802 /* If we are in verbose mode, write out the version and maybe all the
1803 option flags in use. */
1806 print_version (stderr, "");
1808 print_switch_values (print_to_stderr);
1811 if (flag_syntax_only)
1813 write_symbols = NO_DEBUG;
1817 /* A lot of code assumes write_symbols == NO_DEBUG if the debugging
1819 if (debug_info_level == DINFO_LEVEL_NONE)
1820 write_symbols = NO_DEBUG;
1822 /* Now we know write_symbols, set up the debug hooks based on it.
1823 By default we do nothing for debug output. */
1824 if (PREFERRED_DEBUGGING_TYPE == NO_DEBUG)
1825 default_debug_hooks = &do_nothing_debug_hooks;
1826 #if defined(DBX_DEBUGGING_INFO)
1827 else if (PREFERRED_DEBUGGING_TYPE == DBX_DEBUG)
1828 default_debug_hooks = &dbx_debug_hooks;
1830 #if defined(XCOFF_DEBUGGING_INFO)
1831 else if (PREFERRED_DEBUGGING_TYPE == XCOFF_DEBUG)
1832 default_debug_hooks = &xcoff_debug_hooks;
1834 #ifdef SDB_DEBUGGING_INFO
1835 else if (PREFERRED_DEBUGGING_TYPE == SDB_DEBUG)
1836 default_debug_hooks = &sdb_debug_hooks;
1838 #ifdef DWARF2_DEBUGGING_INFO
1839 else if (PREFERRED_DEBUGGING_TYPE == DWARF2_DEBUG)
1840 default_debug_hooks = &dwarf2_debug_hooks;
1842 #ifdef VMS_DEBUGGING_INFO
1843 else if (PREFERRED_DEBUGGING_TYPE == VMS_DEBUG
1844 || PREFERRED_DEBUGGING_TYPE == VMS_AND_DWARF2_DEBUG)
1845 default_debug_hooks = &vmsdbg_debug_hooks;
1848 if (write_symbols == NO_DEBUG)
1850 #if defined(DBX_DEBUGGING_INFO)
1851 else if (write_symbols == DBX_DEBUG)
1852 debug_hooks = &dbx_debug_hooks;
1854 #if defined(XCOFF_DEBUGGING_INFO)
1855 else if (write_symbols == XCOFF_DEBUG)
1856 debug_hooks = &xcoff_debug_hooks;
1858 #ifdef SDB_DEBUGGING_INFO
1859 else if (write_symbols == SDB_DEBUG)
1860 debug_hooks = &sdb_debug_hooks;
1862 #ifdef DWARF2_DEBUGGING_INFO
1863 else if (write_symbols == DWARF2_DEBUG)
1864 debug_hooks = &dwarf2_debug_hooks;
1866 #ifdef VMS_DEBUGGING_INFO
1867 else if (write_symbols == VMS_DEBUG || write_symbols == VMS_AND_DWARF2_DEBUG)
1868 debug_hooks = &vmsdbg_debug_hooks;
1871 error ("target system does not support the \"%s\" debug format",
1872 debug_type_names[write_symbols]);
1874 /* Now we know which debug output will be used so we can set
1875 flag_var_tracking, flag_rename_registers if the user has
1876 not specified them. */
1877 if (debug_info_level < DINFO_LEVEL_NORMAL
1878 || debug_hooks->var_location == do_nothing_debug_hooks.var_location)
1880 if (flag_var_tracking == 1
1881 || flag_var_tracking_uninit == 1)
1883 if (debug_info_level < DINFO_LEVEL_NORMAL)
1884 warning (0, "variable tracking requested, but useless unless "
1885 "producing debug info");
1887 warning (0, "variable tracking requested, but not supported "
1888 "by this debug format");
1890 flag_var_tracking = 0;
1891 flag_var_tracking_uninit = 0;
1894 if (flag_rename_registers == AUTODETECT_VALUE)
1895 flag_rename_registers = default_debug_hooks->var_location
1896 != do_nothing_debug_hooks.var_location;
1898 if (flag_var_tracking == AUTODETECT_VALUE)
1899 flag_var_tracking = optimize >= 1;
1901 if (flag_tree_cselim == AUTODETECT_VALUE)
1902 #ifdef HAVE_conditional_move
1903 flag_tree_cselim = 1;
1905 flag_tree_cselim = 0;
1908 /* If the user specifically requested variable tracking with tagging
1909 uninitialized variables, we need to turn on variable tracking.
1910 (We already determined above that variable tracking is feasible.) */
1911 if (flag_var_tracking_uninit)
1912 flag_var_tracking = 1;
1914 /* If auxiliary info generation is desired, open the output file.
1915 This goes in the same directory as the source file--unlike
1916 all the other output files. */
1917 if (flag_gen_aux_info)
1919 aux_info_file = fopen (aux_info_file_name, "w");
1920 if (aux_info_file == 0)
1921 fatal_error ("can%'t open %s: %m", aux_info_file_name);
1924 if (! targetm.have_named_sections)
1926 if (flag_function_sections)
1928 warning (0, "-ffunction-sections not supported for this target");
1929 flag_function_sections = 0;
1931 if (flag_data_sections)
1933 warning (0, "-fdata-sections not supported for this target");
1934 flag_data_sections = 0;
1938 if (flag_function_sections && profile_flag)
1940 warning (0, "-ffunction-sections disabled; it makes profiling impossible");
1941 flag_function_sections = 0;
1944 #ifndef HAVE_prefetch
1945 if (flag_prefetch_loop_arrays)
1947 warning (0, "-fprefetch-loop-arrays not supported for this target");
1948 flag_prefetch_loop_arrays = 0;
1951 if (flag_prefetch_loop_arrays && !HAVE_prefetch)
1953 warning (0, "-fprefetch-loop-arrays not supported for this target (try -march switches)");
1954 flag_prefetch_loop_arrays = 0;
1958 /* This combination of options isn't handled for i386 targets and doesn't
1959 make much sense anyway, so don't allow it. */
1960 if (flag_prefetch_loop_arrays && optimize_size)
1962 warning (0, "-fprefetch-loop-arrays is not supported with -Os");
1963 flag_prefetch_loop_arrays = 0;
1966 #ifndef OBJECT_FORMAT_ELF
1967 #ifndef OBJECT_FORMAT_MACHO
1968 if (flag_function_sections && write_symbols != NO_DEBUG)
1969 warning (0, "-ffunction-sections may affect debugging on some targets");
1973 /* The presence of IEEE signaling NaNs, implies all math can trap. */
1974 if (flag_signaling_nans)
1975 flag_trapping_math = 1;
1977 /* We cannot reassociate if we want traps or signed zeros. Â */
1978 if (flag_associative_math && (flag_trapping_math || flag_signed_zeros))
1980 warning (0, "-fassociative-math disabled; other options take precedence");
1981 flag_associative_math = 0;
1984 /* With -fcx-limited-range, we do cheap and quick complex arithmetic. */
1985 if (flag_cx_limited_range)
1986 flag_complex_method = 0;
1988 /* With -fcx-fortran-rules, we do something in-between cheap and C99. */
1989 if (flag_cx_fortran_rules)
1990 flag_complex_method = 1;
1992 /* Targets must be able to place spill slots at lower addresses. If the
1993 target already uses a soft frame pointer, the transition is trivial. */
1994 if (!FRAME_GROWS_DOWNWARD && flag_stack_protect)
1996 warning (0, "-fstack-protector not supported for this target");
1997 flag_stack_protect = 0;
1999 if (!flag_stack_protect)
2000 warn_stack_protect = 0;
2002 /* ??? Unwind info is not correct around the CFG unless either a frame
2003 pointer is present or A_O_A is set. Fixing this requires rewriting
2004 unwind info generation to be aware of the CFG and propagating states
2006 if (flag_unwind_tables && !ACCUMULATE_OUTGOING_ARGS
2007 && flag_omit_frame_pointer)
2009 warning (0, "unwind tables currently require a frame pointer "
2011 flag_omit_frame_pointer = 0;
2015 /* This function can be called multiple times to reinitialize the compiler
2016 back end when register classes or instruction sets have changed,
2017 before each function. */
2019 backend_init_target (void)
2021 /* Initialize alignment variables. */
2024 /* This reinitializes hard_frame_pointer, and calls init_reg_modes_target()
2025 to initialize reg_raw_mode[]. */
2028 /* This invokes target hooks to set fixed_reg[] etc, which is
2032 /* This depends on stack_pointer_rtx. */
2033 init_fake_stack_mems ();
2035 /* Sets static_base_value[HARD_FRAME_POINTER_REGNUM], which is
2037 init_alias_target ();
2039 /* Depends on HARD_FRAME_POINTER_REGNUM. */
2042 /* The following initialization functions need to generate rtl, so
2043 provide a dummy function context for them. */
2044 init_dummy_function_start ();
2046 /* rtx_cost is mode-dependent, so cached values need to be recomputed
2047 on a mode change. */
2050 /* We may need to recompute regno_save_code[] and regno_restore_code[]
2051 after a mode change as well. */
2052 if (flag_caller_saves)
2053 init_caller_save ();
2054 expand_dummy_function_end ();
2057 /* Initialize the compiler back end. This function is called only once,
2058 when starting the compiler. */
2062 init_emit_once (debug_info_level == DINFO_LEVEL_NORMAL
2063 || debug_info_level == DINFO_LEVEL_VERBOSE
2064 #ifdef VMS_DEBUGGING_INFO
2065 /* Enable line number info for traceback. */
2066 || debug_info_level > DINFO_LEVEL_NONE
2068 || flag_test_coverage);
2071 init_inline_once ();
2072 init_varasm_once ();
2073 save_register_info ();
2075 /* Initialize the target-specific back end pieces. */
2076 backend_init_target ();
2079 /* Initialize things that are both lang-dependent and target-dependent.
2080 This function can be called more than once if target parameters change. */
2082 lang_dependent_init_target (void)
2084 /* This creates various _DECL nodes, so needs to be called after the
2085 front end is initialized. It also depends on the HAVE_xxx macros
2086 generated from the target machine description. */
2089 /* The following initialization functions need to generate rtl, so
2090 provide a dummy function context for them. */
2091 init_dummy_function_start ();
2093 /* Do the target-specific parts of expr initialization. */
2094 init_expr_target ();
2096 /* Although the actions of init_set_costs are language-independent,
2097 it uses optabs, so we cannot call it from backend_init. */
2100 expand_dummy_function_end ();
2103 /* Language-dependent initialization. Returns nonzero on success. */
2105 lang_dependent_init (const char *name)
2107 location_t save_loc = input_location;
2108 if (dump_base_name == 0)
2109 dump_base_name = name && name[0] ? name : "gccdump";
2111 /* Other front-end initialization. */
2112 input_location = BUILTINS_LOCATION;
2113 if (lang_hooks.init () == 0)
2115 input_location = save_loc;
2117 init_asm_output (name);
2119 /* This creates various _DECL nodes, so needs to be called after the
2120 front end is initialized. */
2123 /* Do the target-specific parts of the initialization. */
2124 lang_dependent_init_target ();
2126 /* If dbx symbol table desired, initialize writing it and output the
2127 predefined types. */
2128 timevar_push (TV_SYMOUT);
2130 #if defined DWARF2_DEBUGGING_INFO || defined DWARF2_UNWIND_INFO
2131 if (dwarf2out_do_frame ())
2132 dwarf2out_frame_init ();
2135 /* Now we have the correct original filename, we can initialize
2137 (*debug_hooks->init) (name);
2139 timevar_pop (TV_SYMOUT);
2145 /* Reinitialize everything when target parameters, such as register usage,
2148 target_reinit (void)
2150 /* Reinitialize RTL backend. */
2151 backend_init_target ();
2153 /* Reinitialize lang-dependent parts. */
2154 lang_dependent_init_target ();
2158 dump_memory_report (bool final)
2160 ggc_print_statistics ();
2161 stringpool_statistics ();
2162 dump_tree_statistics ();
2163 dump_rtx_statistics ();
2164 dump_varray_statistics ();
2165 dump_alloc_pool_statistics ();
2166 dump_bitmap_statistics ();
2167 dump_ggc_loc_statistics (final);
2170 /* Clean up: close opened files, etc. */
2175 /* Close the dump files. */
2176 if (flag_gen_aux_info)
2178 fclose (aux_info_file);
2180 unlink (aux_info_file_name);
2183 /* Close non-debugging input and output files. Take special care to note
2184 whether fclose returns an error, since the pages might still be on the
2185 buffer chain while the file is open. */
2189 if (ferror (asm_out_file) != 0)
2190 fatal_error ("error writing to %s: %m", asm_file_name);
2191 if (fclose (asm_out_file) != 0)
2192 fatal_error ("error closing %s: %m", asm_file_name);
2195 finish_optimization_passes ();
2198 dump_memory_report (true);
2200 /* Language-specific end of compilation actions. */
2201 lang_hooks.finish ();
2204 /* Initialize the compiler, and compile the input file. */
2208 /* Initialize timing first. The C front ends read the main file in
2209 the post_options hook, and C++ does file timings. */
2210 if (time_report || !quiet_flag || flag_detailed_statistics)
2212 timevar_start (TV_TOTAL);
2216 /* Don't do any more if an error has already occurred. */
2219 /* This must be run always, because it is needed to compute the FP
2220 predefined macros, such as __LDBL_MAX__, for targets using non
2221 default FP formats. */
2222 init_adjust_machine_modes ();
2224 /* Set up the back-end if requested. */
2228 /* Language-dependent initialization. Returns true on success. */
2229 if (lang_dependent_init (main_input_filename))
2235 /* Stop timing and print the times. */
2236 timevar_stop (TV_TOTAL);
2237 timevar_print (stderr);
2240 /* Entry point of cc1, cc1plus, jc1, f771, etc.
2241 Exit code is FATAL_EXIT_CODE if can't open files or if there were
2242 any errors, or SUCCESS_EXIT_CODE if compilation succeeded.
2244 It is not safe to call this function more than once. */
2247 toplev_main (unsigned int argc, const char **argv)
2251 /* Initialization of GCC's environment, and diagnostics. */
2252 general_init (argv[0]);
2254 /* Parse the options and do minimal processing; basically just
2255 enough to default flags appropriately. */
2256 decode_options (argc, argv);
2260 /* Exit early if we can (e.g. -help). */
2261 if (!exit_after_options)
2264 if (warningcount || errorcount)
2265 print_ignored_options ();
2267 if (errorcount || sorrycount)
2268 return (FATAL_EXIT_CODE);
2270 return (SUCCESS_EXIT_CODE);