1 /* Top level of GNU C compiler
2 Copyright (C) 1987, 1988, 1989, 1992 Free Software Foundation, Inc.
4 This file is part of GNU CC.
6 GNU CC is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2, or (at your option)
11 GNU CC is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with GNU CC; see the file COPYING. If not, write to
18 the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
21 /* This is the top level of cc1/c++.
22 It parses command args, opens files, invokes the various passes
23 in the proper order, and counts the time used by each.
24 Error messages and low-level interface to malloc also handled here. */
27 #include <sys/types.h>
36 #include <sys/param.h>
37 /* This is for hpux. It is a real screw. They should change hpux. */
39 #include <sys/times.h>
40 #include <time.h> /* Correct for hpux at least. Is it good on other USG? */
41 #undef FFS /* Some systems define this in param.h. */
45 #include <sys/resource.h>
51 /* #include "c-tree.h" */
54 #include "insn-attr.h"
56 #ifdef XCOFF_DEBUGGING_INFO
61 /* The extra parameters substantially improve the I/O performance. */
63 VMS_fopen (fname
, type
)
67 if (strcmp (type
, "w") == 0)
68 return fopen (fname
, type
, "mbc=16", "deq=64", "fop=tef", "shr=nil");
69 return fopen (fname
, type
, "mbc=16");
71 #define fopen VMS_fopen
74 #ifndef DEFAULT_GDB_EXTENSIONS
75 #define DEFAULT_GDB_EXTENSIONS 1
78 extern int rtx_equal_function_value_matters
;
80 extern char **environ
;
81 extern char *version_string
, *language_string
;
83 extern void init_lex ();
84 extern void init_decl_processing ();
85 extern void init_obstacks ();
86 extern void init_tree_codes ();
87 extern void init_rtl ();
88 extern void init_optabs ();
89 extern void init_stmt ();
90 extern void init_reg_sets ();
91 extern void dump_flow_info ();
92 extern void dump_sched_info ();
93 extern void dump_local_alloc ();
95 void rest_of_decl_compilation ();
97 void error_with_file_and_line ();
102 void set_target_switch ();
103 static void print_switch_values ();
104 static char *decl_name ();
106 /* Name of program invoked, sans directories. */
110 /* Copy of arguments to main. */
114 /* Name of current original source file (what was input to cpp).
115 This comes from each #-command in the actual input. */
117 char *input_filename
;
119 /* Name of top-level original source file (what was input to cpp).
120 This comes from the #-command at the beginning of the actual input.
121 If there isn't any there, then this is the cc1 input file name. */
123 char *main_input_filename
;
125 /* Stream for reading from the input file. */
129 /* Current line number in real source file. */
133 /* Stack of currently pending input files. */
135 struct file_stack
*input_file_stack
;
137 /* Incremented on each change to input_file_stack. */
138 int input_file_stack_tick
;
140 /* FUNCTION_DECL for function now being parsed or compiled. */
142 extern tree current_function_decl
;
144 /* Name to use as base of names for dump output files. */
146 char *dump_base_name
;
148 /* Bit flags that specify the machine subtype we are compiling for.
149 Bits are tested using macros TARGET_... defined in the tm.h file
150 and set by `-m...' switches. Must be defined in rtlanal.c. */
152 extern int target_flags
;
154 /* Flags saying which kinds of debugging dump have been requested. */
157 int rtl_dump_and_exit
= 0;
158 int jump_opt_dump
= 0;
163 int combine_dump
= 0;
165 int local_reg_dump
= 0;
166 int global_reg_dump
= 0;
168 int jump2_opt_dump
= 0;
169 int dbr_sched_dump
= 0;
170 int flag_print_asm_name
= 0;
171 int stack_reg_dump
= 0;
173 /* Name for output file of assembly code, specified with -o. */
177 /* Value of the -G xx switch, and whether it was passed or not. */
181 /* Type(s) of debugging information we are producing (if any).
182 See flags.h for the definitions of the different possible
183 types of debugging information. */
184 enum debug_info_type write_symbols
= NO_DEBUG
;
186 /* Level of debugging information we are producing. See flags.h
187 for the definitions of the different possible levels. */
188 enum debug_info_level debug_info_level
= DINFO_LEVEL_NONE
;
190 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
191 /* Nonzero means can use our own extensions to DBX format.
192 Relevant only when write_symbols == DBX_DEBUG or XCOFF_DEBUG. */
193 int use_gdb_dbx_extensions
= 0;
196 /* Nonzero means do optimizations. -O.
197 Particular numeric values stand for particular amounts of optimization;
198 thus, -O2 stores 2 here. However, the optimizations beyond the basic
199 ones are not controlled directly by this variable. Instead, they are
200 controlled by individual `flag_...' variables that are defaulted
201 based on this variable. */
205 /* Number of error messages and warning messages so far. */
208 int warningcount
= 0;
211 /* Pointer to function to compute the name to use to print a declaration. */
213 char *(*decl_printable_name
) ();
215 /* Pointer to function to compute rtl for a language-specific tree code. */
217 struct rtx_def
*(*lang_expand_expr
) ();
219 /* Nonzero if generating code to do profiling. */
221 int profile_flag
= 0;
223 /* Nonzero if generating code to do profiling on a line-by-line basis. */
225 int profile_block_flag
;
227 /* Nonzero for -pedantic switch: warn about anything
228 that standard spec forbids. */
232 /* Temporarily suppress certain warnings.
233 This is set while reading code from a system header file. */
235 int in_system_header
= 0;
237 /* Nonzero means do stupid register allocation.
238 Currently, this is 1 if `optimize' is 0. */
240 int obey_regdecls
= 0;
242 /* Don't print functions as they are compiled and don't print
243 times taken by the various passes. -quiet. */
249 /* Nonzero means `char' should be signed. */
251 int flag_signed_char
;
253 /* Nonzero means give an enum type only as many bytes as it needs. */
255 int flag_short_enums
;
257 /* Nonzero for -fcaller-saves: allocate values in regs that need to
258 be saved across function calls, if that produces overall better code.
259 Optional now, so people can test it. */
261 #ifdef DEFAULT_CALLER_SAVES
262 int flag_caller_saves
= 1;
264 int flag_caller_saves
= 0;
267 /* Nonzero for -fpcc-struct-return: return values the same way PCC does. */
269 int flag_pcc_struct_return
= 0;
271 /* Nonzero for -fforce-mem: load memory value into a register
272 before arithmetic on it. This makes better cse but slower compilation. */
274 int flag_force_mem
= 0;
276 /* Nonzero for -fforce-addr: load memory address into a register before
277 reference to memory. This makes better cse but slower compilation. */
279 int flag_force_addr
= 0;
281 /* Nonzero for -fdefer-pop: don't pop args after each function call;
282 instead save them up to pop many calls' args with one insns. */
284 int flag_defer_pop
= 1;
286 /* Nonzero for -ffloat-store: don't allocate floats and doubles
287 in extended-precision registers. */
289 int flag_float_store
= 0;
291 /* Nonzero for -fcse-follow-jumps:
292 have cse follow jumps to do a more extensive job. */
294 int flag_cse_follow_jumps
;
296 /* Nonzero for -fexpensive-optimizations:
297 perform miscellaneous relatively-expensive optimizations. */
298 int flag_expensive_optimizations
;
300 /* Nonzero for -fthread-jumps:
301 have jump optimize output of loop. */
303 int flag_thread_jumps
;
305 /* Nonzero enables strength-reduction in loop.c. */
307 int flag_strength_reduce
= 0;
309 /* Nonzero enables loop unrolling in unroll.c. Only loops for which the
310 number of iterations can be calculated at compile-time (UNROLL_COMPLETELY,
311 UNROLL_MODULO) or at run-time (preconditioned to be UNROLL_MODULO) are
314 int flag_unroll_loops
;
316 /* Nonzero enables loop unrolling in unroll.c. All loops are unrolled.
317 This is generally not a win. */
319 int flag_unroll_all_loops
;
321 /* Nonzero for -fwritable-strings:
322 store string constants in data segment and don't uniquize them. */
324 int flag_writable_strings
= 0;
326 /* Nonzero means don't put addresses of constant functions in registers.
327 Used for compiling the Unix kernel, where strange substitutions are
328 done on the assembly output. */
330 int flag_no_function_cse
= 0;
332 /* Nonzero for -fomit-frame-pointer:
333 don't make a frame pointer in simple functions that don't require one. */
335 int flag_omit_frame_pointer
= 0;
337 /* Nonzero to inhibit use of define_optimization peephole opts. */
339 int flag_no_peephole
= 0;
341 /* Nonzero means all references through pointers are volatile. */
345 /* Nonzero means just do syntax checking; don't output anything. */
347 int flag_syntax_only
= 0;
349 /* Nonzero means to rerun cse after loop optimization. This increases
350 compilation time about 20% and picks up a few more common expressions. */
352 static int flag_rerun_cse_after_loop
;
354 /* Nonzero for -finline-functions: ok to inline functions that look like
355 good inline candidates. */
357 int flag_inline_functions
;
359 /* Nonzero for -fkeep-inline-functions: even if we make a function
360 go inline everywhere, keep its defintion around for debugging
363 int flag_keep_inline_functions
;
365 /* Nonzero means that functions declared `inline' will be treated
366 as `static'. Prevents generation of zillions of copies of unused
367 static inline functions; instead, `inlines' are written out
368 only when actually used. Used in conjunction with -g. Also
369 does the right thing with #pragma interface. */
373 /* Nonzero means we should be saving declaration info into a .X file. */
375 int flag_gen_aux_info
= 0;
377 /* Specified name of aux-info file. */
379 static char *aux_info_file_name
;
381 /* Nonzero means make the text shared if supported. */
383 int flag_shared_data
;
385 /* Nonzero means schedule into delayed branch slots if supported. */
387 int flag_delayed_branch
;
389 /* Nonzero if we are compiling pure (sharable) code.
390 Value is 1 if we are doing reasonable (i.e. simple
391 offset into offset table) pic. Value is 2 if we can
392 only perform register offsets. */
396 /* Nonzero means place uninitialized global data in the bss section. */
400 /* Nonzero means pretend it is OK to examine bits of target floats,
401 even if that isn't true. The resulting code will have incorrect constants,
402 but the same series of instructions that the native compiler would make. */
404 int flag_pretend_float
;
406 /* Nonzero means change certain warnings into errors.
407 Usually these are warnings about failure to conform to some standard. */
409 int flag_pedantic_errors
= 0;
411 /* flag_schedule_insns means schedule insns within basic blocks (before
413 flag_schedule_insns_after_reload means schedule insns after
416 int flag_schedule_insns
= 0;
417 int flag_schedule_insns_after_reload
= 0;
419 /* -finhibit-size-directive inhibits output of .size for ELF.
420 This is used only for compiling crtstuff.c,
421 and it may be extended to other effects
422 needed for crtstuff.c on other systems. */
423 int flag_inhibit_size_directive
= 0;
425 /* -fgnu-linker specifies use of the GNU linker for initializations.
426 (Or, more generally, a linker that handles initializations.)
427 -fno-gnu-linker says that collect2 will be used. */
429 int flag_gnu_linker
= 0;
431 int flag_gnu_linker
= 1;
434 /* Table of language-independent -f options.
435 STRING is the option name. VARIABLE is the address of the variable.
436 ON_VALUE is the value to store in VARIABLE
437 if `-fSTRING' is seen as an option.
438 (If `-fno-STRING' is seen as an option, the opposite value is stored.) */
440 struct { char *string
; int *variable
; int on_value
;} f_options
[] =
442 {"float-store", &flag_float_store
, 1},
443 {"volatile", &flag_volatile
, 1},
444 {"defer-pop", &flag_defer_pop
, 1},
445 {"omit-frame-pointer", &flag_omit_frame_pointer
, 1},
446 {"cse-follow-jumps", &flag_cse_follow_jumps
, 1},
447 {"expensive-optimizations", &flag_expensive_optimizations
, 1},
448 {"thread-jumps", &flag_thread_jumps
, 1},
449 {"strength-reduce", &flag_strength_reduce
, 1},
450 {"unroll-loops", &flag_unroll_loops
, 1},
451 {"unroll-all-loops", &flag_unroll_all_loops
, 1},
452 {"writable-strings", &flag_writable_strings
, 1},
453 {"peephole", &flag_no_peephole
, 0},
454 {"force-mem", &flag_force_mem
, 1},
455 {"force-addr", &flag_force_addr
, 1},
456 {"function-cse", &flag_no_function_cse
, 0},
457 {"inline-functions", &flag_inline_functions
, 1},
458 {"keep-inline-functions", &flag_keep_inline_functions
, 1},
459 {"inline", &flag_no_inline
, 0},
460 {"syntax-only", &flag_syntax_only
, 1},
461 {"shared-data", &flag_shared_data
, 1},
462 {"caller-saves", &flag_caller_saves
, 1},
463 {"pcc-struct-return", &flag_pcc_struct_return
, 1},
464 {"delayed-branch", &flag_delayed_branch
, 1},
465 {"rerun-cse-after-loop", &flag_rerun_cse_after_loop
, 1},
466 {"pretend-float", &flag_pretend_float
, 1},
467 {"schedule-insns", &flag_schedule_insns
, 1},
468 {"schedule-insns2", &flag_schedule_insns_after_reload
, 1},
469 {"pic", &flag_pic
, 1},
470 {"PIC", &flag_pic
, 2},
471 {"common", &flag_no_common
, 0},
472 {"inhibit-size-directive", &flag_inhibit_size_directive
, 1},
473 {"gnu-linker", &flag_gnu_linker
, 1}
476 /* Options controlling warnings */
478 /* Don't print warning messages. -w. */
480 int inhibit_warnings
= 0;
482 /* Print various extra warnings. -W. */
484 int extra_warnings
= 0;
486 /* Treat warnings as errors. -Werror. */
488 int warnings_are_errors
= 0;
490 /* Nonzero to warn about unused local variables. */
494 /* Nonzero to warn about variables used before they are initialized. */
496 int warn_uninitialized
;
498 /* Nonzero means warn about all declarations which shadow others. */
502 /* Warn if a switch on an enum fails to have a case for every enum value. */
506 /* Nonzero means warn about function definitions that default the return type
507 or that use a null return and have a return-type other than void. */
509 int warn_return_type
;
511 /* Nonzero means warn about pointer casts that increase the required
512 alignment of the target type (and might therefore lead to a crash
513 due to a misaligned access). */
517 /* Nonzero means warn about any identifiers that match in the first N
518 characters. The value N is in `id_clash_len'. */
523 /* Nonzero means warn if inline function is too large. */
527 /* Warn if a function returns an aggregate,
528 since there are often incompatible calling conventions for doing this. */
530 int warn_aggregate_return
;
532 /* Likewise for -W. */
534 struct { char *string
; int *variable
; int on_value
;} W_options
[] =
536 {"unused", &warn_unused
, 1},
537 {"error", &warnings_are_errors
, 1},
538 {"shadow", &warn_shadow
, 1},
539 {"switch", &warn_switch
, 1},
540 {"return-type", &warn_return_type
, 1},
541 {"aggregate-return", &warn_aggregate_return
, 1},
542 {"cast-align", &warn_cast_align
, 1},
543 {"uninitialized", &warn_uninitialized
, 1},
544 {"inline", &warn_inline
, 1}
547 /* Output files for assembler code (real compiler output)
548 and debugging dumps. */
553 FILE *jump_opt_dump_file
;
555 FILE *loop_dump_file
;
556 FILE *cse2_dump_file
;
557 FILE *flow_dump_file
;
558 FILE *combine_dump_file
;
559 FILE *sched_dump_file
;
560 FILE *local_reg_dump_file
;
561 FILE *global_reg_dump_file
;
562 FILE *sched2_dump_file
;
563 FILE *jump2_opt_dump_file
;
564 FILE *dbr_sched_dump_file
;
565 FILE *stack_reg_dump_file
;
567 /* Time accumulators, to count the total time spent in various passes. */
571 int integration_time
;
579 int local_alloc_time
;
580 int global_alloc_time
;
583 int shorten_branch_time
;
589 /* Return time used so far, in microseconds. */
598 struct rusage rusage
;
603 int proc_system_time
;
605 int child_system_time
;
615 return (tms
.tms_utime
+ tms
.tms_stime
) * (1000000 / HZ
);
618 getrusage (0, &rusage
);
619 return (rusage
.ru_utime
.tv_sec
* 1000000 + rusage
.ru_utime
.tv_usec
620 + rusage
.ru_stime
.tv_sec
* 1000000 + rusage
.ru_stime
.tv_usec
);
623 return (vms_times
.proc_user_time
+ vms_times
.proc_system_time
) * 10000;
628 #define TIMEVAR(VAR, BODY) \
629 do { int otime = get_run_time (); BODY; VAR += get_run_time () - otime; } while (0)
632 print_time (str
, total
)
637 "time in %s: %d.%06d\n",
638 str
, total
/ 1000000, total
% 1000000);
641 /* Count an error or warning. Return 1 if the message should be printed. */
644 count_error (warningp
)
647 if (warningp
&& inhibit_warnings
)
650 if (warningp
&& !warnings_are_errors
)
654 static int warning_message
= 0;
656 if (warningp
&& !warning_message
)
658 fprintf (stderr
, "%s: warnings being treated as errors\n", progname
);
667 /* Print a fatal error message. NAME is the text.
668 Also include a system error message based on `errno'. */
671 pfatal_with_name (name
)
674 fprintf (stderr
, "%s: ", progname
);
680 fatal_io_error (name
)
683 fprintf (stderr
, "%s: %s: I/O error\n", progname
, name
);
696 /* Called to give a better error message when we don't have an insn to match
697 what we are looking for or if the insn's constraints aren't satisfied,
698 rather than just calling abort(). */
701 fatal_insn_not_found (insn
)
704 if (INSN_CODE (insn
) < 0)
705 error ("internal error--unrecognizable insn:", 0);
707 error ("internal error--insn does not satisfy its constraints:", 0);
710 fflush (asm_out_file
);
712 fflush (aux_info_file
);
714 fflush (rtl_dump_file
);
715 if (jump_opt_dump_file
)
716 fflush (jump_opt_dump_file
);
718 fflush (cse_dump_file
);
720 fflush (loop_dump_file
);
722 fflush (cse2_dump_file
);
724 fflush (flow_dump_file
);
725 if (combine_dump_file
)
726 fflush (combine_dump_file
);
728 fflush (sched_dump_file
);
729 if (local_reg_dump_file
)
730 fflush (local_reg_dump_file
);
731 if (global_reg_dump_file
)
732 fflush (global_reg_dump_file
);
733 if (sched2_dump_file
)
734 fflush (sched2_dump_file
);
735 if (jump2_opt_dump_file
)
736 fflush (jump2_opt_dump_file
);
737 if (dbr_sched_dump_file
)
738 fflush (dbr_sched_dump_file
);
739 if (stack_reg_dump_file
)
740 fflush (stack_reg_dump_file
);
744 /* This is the default decl_printable_name function. */
747 decl_name (decl
, kind
)
751 return IDENTIFIER_POINTER (DECL_NAME (decl
));
754 static int need_error_newline
;
756 /* Function of last error message;
757 more generally, function such that if next error message is in it
758 then we don't have to mention the function name. */
759 static tree last_error_function
= NULL
;
761 /* Used to detect when input_file_stack has changed since last described. */
762 static int last_error_tick
;
764 /* Called when the start of a function definition is parsed,
765 this function prints on stderr the name of the function. */
768 announce_function (decl
)
774 if (rtl_dump_and_exit
)
775 fprintf (stderr
, "%s ", IDENTIFIER_POINTER (DECL_NAME (decl
)));
777 fprintf (stderr
, " %s", (*decl_printable_name
) (decl
, &junk
));
779 need_error_newline
= 1;
780 last_error_function
= current_function_decl
;
784 /* Prints out, if necessary, the name of the current function
785 which caused an error. Called from all error and warning functions. */
788 report_error_function (file
)
791 struct file_stack
*p
;
793 if (need_error_newline
)
795 fprintf (stderr
, "\n");
796 need_error_newline
= 0;
799 if (last_error_function
!= current_function_decl
)
801 char *kind
= "function";
802 if (current_function_decl
!= 0
803 && TREE_CODE (TREE_TYPE (current_function_decl
)) == METHOD_TYPE
)
807 fprintf (stderr
, "%s: ", file
);
809 if (current_function_decl
== NULL
)
810 fprintf (stderr
, "At top level:\n");
813 char *name
= (*decl_printable_name
) (current_function_decl
, &kind
);
814 fprintf (stderr
, "In %s `%s':\n", kind
, name
);
817 last_error_function
= current_function_decl
;
819 if (input_file_stack
&& input_file_stack
->next
!= 0
820 && input_file_stack_tick
!= last_error_tick
)
822 fprintf (stderr
, "In file included");
823 for (p
= input_file_stack
->next
; p
; p
= p
->next
)
825 fprintf (stderr
, " from %s:%d", p
->name
, p
->line
);
827 fprintf (stderr
, ",");
829 fprintf (stderr
, ":\n");
830 last_error_tick
= input_file_stack_tick
;
834 /* Report an error at the current line number.
835 S and V are a string and an arg for `printf'. */
840 int v
; /* @@also used as pointer */
841 int v2
; /* @@also used as pointer */
843 error_with_file_and_line (input_filename
, lineno
, s
, v
, v2
);
846 /* Report an error at line LINE of file FILE.
847 S and V are a string and an arg for `printf'. */
850 error_with_file_and_line (file
, line
, s
, v
, v2
)
859 report_error_function (file
);
862 fprintf (stderr
, "%s:%d: ", file
, line
);
864 fprintf (stderr
, "%s: ", progname
);
865 fprintf (stderr
, s
, v
, v2
);
866 fprintf (stderr
, "\n");
869 /* Report an error at the declaration DECL.
870 S and V are a string and an arg which uses %s to substitute the declaration name. */
873 error_with_decl (decl
, s
, v
)
881 report_error_function (DECL_SOURCE_FILE (decl
));
883 fprintf (stderr
, "%s:%d: ",
884 DECL_SOURCE_FILE (decl
), DECL_SOURCE_LINE (decl
));
886 if (DECL_NAME (decl
))
887 fprintf (stderr
, s
, (*decl_printable_name
) (decl
, &junk
), v
);
889 fprintf (stderr
, s
, "((anonymous))", v
);
890 fprintf (stderr
, "\n");
893 /* Report an error at the line number of the insn INSN.
894 S and V are a string and an arg for `printf'.
895 This is used only when INSN is an `asm' with operands,
896 and each ASM_OPERANDS records its own source file and line. */
899 error_for_asm (insn
, s
, v
, v2
)
902 int v
; /* @@also used as pointer */
903 int v2
; /* @@also used as pointer */
907 rtx body
= PATTERN (insn
);
910 /* Find the (or one of the) ASM_OPERANDS in the insn. */
911 if (GET_CODE (body
) == SET
&& GET_CODE (SET_SRC (body
)) == ASM_OPERANDS
)
912 asmop
= SET_SRC (body
);
913 else if (GET_CODE (body
) == ASM_OPERANDS
)
915 else if (GET_CODE (body
) == PARALLEL
916 && GET_CODE (XVECEXP (body
, 0, 0)) == SET
)
917 asmop
= SET_SRC (XVECEXP (body
, 0, 0));
918 else if (GET_CODE (body
) == PARALLEL
919 && GET_CODE (XVECEXP (body
, 0, 0)) == ASM_OPERANDS
)
920 asmop
= XVECEXP (body
, 0, 0);
922 filename
= ASM_OPERANDS_SOURCE_FILE (asmop
);
923 line
= ASM_OPERANDS_SOURCE_LINE (asmop
);
925 error_with_file_and_line (filename
, line
, s
, v
, v2
);
928 /* Report a warning at line LINE.
929 S and V are a string and an arg for `printf'. */
932 warning_with_file_and_line (file
, line
, s
, v
, v2
, v3
)
940 if (count_error (1) == 0)
943 report_error_function (file
);
946 fprintf (stderr
, "%s:%d: ", file
, line
);
948 fprintf (stderr
, "%s: ", progname
);
950 fprintf (stderr
, "warning: ");
951 fprintf (stderr
, s
, v
, v2
, v3
);
952 fprintf (stderr
, "\n");
955 /* Report a warning at the current line number.
956 S and V are a string and an arg for `printf'. */
959 warning (s
, v
, v2
, v3
)
961 int v
; /* @@also used as pointer */
965 warning_with_file_and_line (input_filename
, lineno
, s
, v
, v2
, v3
);
968 /* Report a warning at the declaration DECL.
969 S is string which uses %s to substitute the declaration name.
970 V is a second parameter that S can refer to. */
973 warning_with_decl (decl
, s
, v
)
980 if (count_error (1) == 0)
983 report_error_function (DECL_SOURCE_FILE (decl
));
985 fprintf (stderr
, "%s:%d: ",
986 DECL_SOURCE_FILE (decl
), DECL_SOURCE_LINE (decl
));
988 fprintf (stderr
, "warning: ");
989 if (DECL_NAME (decl
))
990 fprintf (stderr
, s
, (*decl_printable_name
) (decl
, &junk
), v
);
992 fprintf (stderr
, s
, "((anonymous))", v
);
993 fprintf (stderr
, "\n");
996 /* Report a warning at the line number of the insn INSN.
997 S and V are a string and an arg for `printf'.
998 This is used only when INSN is an `asm' with operands,
999 and each ASM_OPERANDS records its own source file and line. */
1002 warning_for_asm (insn
, s
, v
, v2
)
1005 int v
; /* @@also used as pointer */
1006 int v2
; /* @@also used as pointer */
1010 rtx body
= PATTERN (insn
);
1013 /* Find the (or one of the) ASM_OPERANDS in the insn. */
1014 if (GET_CODE (body
) == SET
&& GET_CODE (SET_SRC (body
)) == ASM_OPERANDS
)
1015 asmop
= SET_SRC (body
);
1016 else if (GET_CODE (body
) == ASM_OPERANDS
)
1018 else if (GET_CODE (body
) == PARALLEL
1019 && GET_CODE (XVECEXP (body
, 0, 0)) == SET
)
1020 asmop
= SET_SRC (XVECEXP (body
, 0, 0));
1021 else if (GET_CODE (body
) == PARALLEL
1022 && GET_CODE (XVECEXP (body
, 0, 0)) == ASM_OPERANDS
)
1023 asmop
= XVECEXP (body
, 0, 0);
1025 filename
= ASM_OPERANDS_SOURCE_FILE (asmop
);
1026 line
= ASM_OPERANDS_SOURCE_LINE (asmop
);
1028 warning_with_file_and_line (filename
, line
, s
, v
, v2
);
1031 /* These functions issue either warnings or errors depending on
1032 -pedantic-errors. */
1037 int v
; /* @@also used as pointer */
1040 if (flag_pedantic_errors
)
1047 pedwarn_with_decl (decl
, s
, v
)
1052 if (flag_pedantic_errors
)
1053 error_with_decl (decl
, s
, v
);
1055 warning_with_decl (decl
, s
, v
);
1059 pedwarn_with_file_and_line (file
, line
, s
, v
, v2
)
1066 if (flag_pedantic_errors
)
1067 error_with_file_and_line (file
, line
, s
, v
, v2
);
1069 warning_with_file_and_line (file
, line
, s
, v
, v2
);
1072 /* Apologize for not implementing some feature.
1073 S, V, and V2 are a string and args for `printf'. */
1082 fprintf (stderr
, "%s:%d: ", input_filename
, lineno
);
1084 fprintf (stderr
, "%s: ", progname
);
1086 fprintf (stderr
, "sorry, not implemented: ");
1087 fprintf (stderr
, s
, v
, v2
);
1088 fprintf (stderr
, "\n");
1091 /* Apologize for not implementing some feature, then quit.
1092 S, V, and V2 are a string and args for `printf'. */
1095 really_sorry (s
, v
, v2
)
1100 fprintf (stderr
, "%s:%d: ", input_filename
, lineno
);
1102 fprintf (stderr
, "c++: ");
1104 fprintf (stderr
, "sorry, not implemented: ");
1105 fprintf (stderr
, s
, v
, v2
);
1106 fatal (" (fatal)\n");
1109 /* More 'friendly' abort that prints the line and file.
1110 config.h can #define abort fancy_abort if you like that sort of thing.
1112 I don't think this is actually a good idea.
1113 Other sorts of crashes will look a certain way.
1114 It is a good thing if crashes from calling abort look the same way.
1120 fatal ("internal gcc abort");
1123 /* This calls abort and is used to avoid problems when abort if a macro.
1124 It is used when we need to pass the address of abort. */
1132 /* When `malloc.c' is compiled with `rcheck' defined,
1133 it calls this function to report clobberage. */
1141 /* Same as `malloc' but report error if no memory available. */
1147 register int value
= (int) malloc (size
);
1149 fatal ("virtual memory exhausted");
1153 /* Same as `realloc' but report error if no memory available. */
1156 xrealloc (ptr
, size
)
1160 int result
= realloc (ptr
, size
);
1162 fatal ("virtual memory exhausted");
1166 /* Return the logarithm of X, base 2, considering X unsigned,
1167 if X is a power of 2. Otherwise, returns -1. */
1171 register unsigned int x
;
1173 register int log
= 0;
1174 /* Test for 0 or a power of 2. */
1175 if (x
== 0 || x
!= (x
& -x
))
1177 while ((x
>>= 1) != 0)
1182 /* Given X, an unsigned number, return the largest int Y such that 2**Y <= X.
1183 If X is 0, return -1. */
1187 register unsigned int x
;
1189 register int log
= -1;
1197 jmp_buf float_handler
;
1199 /* Specify where to longjmp to when a floating arithmetic error happens.
1200 If HANDLER is 0, it means don't handle the errors any more. */
1203 set_float_handler (handler
)
1206 float_handled
= (handler
!= 0);
1208 bcopy (handler
, float_handler
, sizeof (float_handler
));
1211 /* Signals actually come here. */
1214 float_signal (signo
)
1215 /* If this is missing, some compilers complain. */
1218 if (float_handled
== 0)
1220 #if defined (USG) || defined (hpux)
1221 signal (SIGFPE
, float_signal
); /* re-enable the signal catcher */
1224 signal (SIGFPE
, float_signal
);
1225 longjmp (float_handler
, 1);
1228 /* Handler for SIGPIPE. */
1232 /* If this is missing, some compilers complain. */
1235 fatal ("output pipe has been closed");
1238 /* Strip off a legitimate source ending from the input string NAME of
1242 strip_off_ending (name
, len
)
1246 if (len
> 2 && ! strcmp (".c", name
+ len
- 2))
1248 else if (len
> 2 && ! strcmp (".m", name
+ len
- 2))
1250 else if (len
> 2 && ! strcmp (".i", name
+ len
- 2))
1252 else if (len
> 3 && ! strcmp (".ii", name
+ len
- 3))
1254 else if (len
> 3 && ! strcmp (".co", name
+ len
- 3))
1256 else if (len
> 3 && ! strcmp (".cc", name
+ len
- 3))
1258 else if (len
> 2 && ! strcmp (".f", name
+ len
- 2))
1260 else if (len
> 4 && ! strcmp (".ada", name
+ len
- 4))
1264 /* Output a file name in the form wanted by System V. */
1267 output_file_directive (asm_file
, input_name
)
1271 int len
= strlen (input_name
);
1272 char *na
= input_name
+ len
;
1274 /* NA gets INPUT_NAME sans directory names. */
1275 while (na
> input_name
)
1282 #ifdef ASM_OUTPUT_MAIN_SOURCE_FILENAME
1283 ASM_OUTPUT_MAIN_SOURCE_FILENAME (asm_file
, na
);
1285 #ifdef ASM_OUTPUT_SOURCE_FILENAME
1286 ASM_OUTPUT_SOURCE_FILENAME (asm_file
, na
);
1288 fprintf (asm_file
, "\t.file\t\"%s\"\n", na
);
1293 /* Compile an entire file of output from cpp, named NAME.
1294 Write a file of assembly output and various debugging dumps. */
1302 int dump_base_name_length
;
1304 int name_specified
= name
!= 0;
1306 if (dump_base_name
== 0)
1307 dump_base_name
= name
? name
: "gccdump";
1308 dump_base_name_length
= strlen (dump_base_name
);
1312 integration_time
= 0;
1320 local_alloc_time
= 0;
1321 global_alloc_time
= 0;
1324 shorten_branch_time
= 0;
1330 /* Open input file. */
1332 if (name
== 0 || !strcmp (name
, "-"))
1338 finput
= fopen (name
, "r");
1340 pfatal_with_name (name
);
1342 /* Initialize data in various passes. */
1348 init_emit_once (debug_info_level
== DINFO_LEVEL_NORMAL
1349 || debug_info_level
== DINFO_LEVEL_VERBOSE
);
1350 init_decl_processing ();
1357 if (flag_caller_saves
)
1358 init_caller_save ();
1360 /* If auxiliary info generation is desired, open the output file.
1361 This goes in the same directory as the source file--unlike
1362 all the other output files. */
1363 if (flag_gen_aux_info
)
1365 aux_info_file
= fopen (aux_info_file_name
, "w");
1366 if (aux_info_file
== 0)
1367 pfatal_with_name (aux_info_file_name
);
1370 /* If rtl dump desired, open the output file. */
1373 register char *dumpname
= (char *) xmalloc (dump_base_name_length
+ 6);
1374 strcpy (dumpname
, dump_base_name
);
1375 strcat (dumpname
, ".rtl");
1376 rtl_dump_file
= fopen (dumpname
, "w");
1377 if (rtl_dump_file
== 0)
1378 pfatal_with_name (dumpname
);
1381 /* If jump_opt dump desired, open the output file. */
1384 register char *dumpname
= (char *) xmalloc (dump_base_name_length
+ 6);
1385 strcpy (dumpname
, dump_base_name
);
1386 strcat (dumpname
, ".jump");
1387 jump_opt_dump_file
= fopen (dumpname
, "w");
1388 if (jump_opt_dump_file
== 0)
1389 pfatal_with_name (dumpname
);
1392 /* If cse dump desired, open the output file. */
1395 register char *dumpname
= (char *) xmalloc (dump_base_name_length
+ 6);
1396 strcpy (dumpname
, dump_base_name
);
1397 strcat (dumpname
, ".cse");
1398 cse_dump_file
= fopen (dumpname
, "w");
1399 if (cse_dump_file
== 0)
1400 pfatal_with_name (dumpname
);
1403 /* If loop dump desired, open the output file. */
1406 register char *dumpname
= (char *) xmalloc (dump_base_name_length
+ 6);
1407 strcpy (dumpname
, dump_base_name
);
1408 strcat (dumpname
, ".loop");
1409 loop_dump_file
= fopen (dumpname
, "w");
1410 if (loop_dump_file
== 0)
1411 pfatal_with_name (dumpname
);
1414 /* If cse2 dump desired, open the output file. */
1417 register char *dumpname
= (char *) xmalloc (dump_base_name_length
+ 6);
1418 strcpy (dumpname
, dump_base_name
);
1419 strcat (dumpname
, ".cse2");
1420 cse2_dump_file
= fopen (dumpname
, "w");
1421 if (cse2_dump_file
== 0)
1422 pfatal_with_name (dumpname
);
1425 /* If flow dump desired, open the output file. */
1428 register char *dumpname
= (char *) xmalloc (dump_base_name_length
+ 6);
1429 strcpy (dumpname
, dump_base_name
);
1430 strcat (dumpname
, ".flow");
1431 flow_dump_file
= fopen (dumpname
, "w");
1432 if (flow_dump_file
== 0)
1433 pfatal_with_name (dumpname
);
1436 /* If combine dump desired, open the output file. */
1439 register char *dumpname
= (char *) xmalloc (dump_base_name_length
+ 10);
1440 strcpy (dumpname
, dump_base_name
);
1441 strcat (dumpname
, ".combine");
1442 combine_dump_file
= fopen (dumpname
, "w");
1443 if (combine_dump_file
== 0)
1444 pfatal_with_name (dumpname
);
1447 /* If scheduling dump desired, open the output file. */
1450 register char *dumpname
= (char *) xmalloc (dump_base_name_length
+ 7);
1451 strcpy (dumpname
, dump_base_name
);
1452 strcat (dumpname
, ".sched");
1453 sched_dump_file
= fopen (dumpname
, "w");
1454 if (sched_dump_file
== 0)
1455 pfatal_with_name (dumpname
);
1458 /* If local_reg dump desired, open the output file. */
1461 register char *dumpname
= (char *) xmalloc (dump_base_name_length
+ 6);
1462 strcpy (dumpname
, dump_base_name
);
1463 strcat (dumpname
, ".lreg");
1464 local_reg_dump_file
= fopen (dumpname
, "w");
1465 if (local_reg_dump_file
== 0)
1466 pfatal_with_name (dumpname
);
1469 /* If global_reg dump desired, open the output file. */
1470 if (global_reg_dump
)
1472 register char *dumpname
= (char *) xmalloc (dump_base_name_length
+ 6);
1473 strcpy (dumpname
, dump_base_name
);
1474 strcat (dumpname
, ".greg");
1475 global_reg_dump_file
= fopen (dumpname
, "w");
1476 if (global_reg_dump_file
== 0)
1477 pfatal_with_name (dumpname
);
1480 /* If 2nd scheduling dump desired, open the output file. */
1483 register char *dumpname
= (char *) xmalloc (dump_base_name_length
+ 8);
1484 strcpy (dumpname
, dump_base_name
);
1485 strcat (dumpname
, ".sched2");
1486 sched2_dump_file
= fopen (dumpname
, "w");
1487 if (sched2_dump_file
== 0)
1488 pfatal_with_name (dumpname
);
1491 /* If jump2_opt dump desired, open the output file. */
1494 register char *dumpname
= (char *) xmalloc (dump_base_name_length
+ 7);
1495 strcpy (dumpname
, dump_base_name
);
1496 strcat (dumpname
, ".jump2");
1497 jump2_opt_dump_file
= fopen (dumpname
, "w");
1498 if (jump2_opt_dump_file
== 0)
1499 pfatal_with_name (dumpname
);
1502 /* If dbr_sched dump desired, open the output file. */
1505 register char *dumpname
= (char *) xmalloc (dump_base_name_length
+ 7);
1506 strcpy (dumpname
, dump_base_name
);
1507 strcat (dumpname
, ".dbr");
1508 dbr_sched_dump_file
= fopen (dumpname
, "w");
1509 if (dbr_sched_dump_file
== 0)
1510 pfatal_with_name (dumpname
);
1515 /* If stack_reg dump desired, open the output file. */
1518 register char *dumpname
= (char *) xmalloc (dump_base_name_length
+ 10);
1519 strcpy (dumpname
, dump_base_name
);
1520 strcat (dumpname
, ".stack");
1521 stack_reg_dump_file
= fopen (dumpname
, "w");
1522 if (stack_reg_dump_file
== 0)
1523 pfatal_with_name (dumpname
);
1528 /* Open assembler code output file. */
1530 if (! name_specified
&& asm_file_name
== 0)
1531 asm_out_file
= stdout
;
1534 register char *dumpname
= (char *) xmalloc (dump_base_name_length
+ 6);
1535 int len
= strlen (dump_base_name
);
1536 strcpy (dumpname
, dump_base_name
);
1537 strip_off_ending (dumpname
, len
);
1538 strcat (dumpname
, ".s");
1539 if (asm_file_name
== 0)
1541 asm_file_name
= (char *) xmalloc (strlen (dumpname
) + 1);
1542 strcpy (asm_file_name
, dumpname
);
1544 if (!strcmp (asm_file_name
, "-"))
1545 asm_out_file
= stdout
;
1547 asm_out_file
= fopen (asm_file_name
, "w");
1548 if (asm_out_file
== 0)
1549 pfatal_with_name (asm_file_name
);
1552 #ifdef IO_BUFFER_SIZE
1553 setvbuf (asm_out_file
, xmalloc (IO_BUFFER_SIZE
), _IOFBF
, IO_BUFFER_SIZE
);
1556 input_filename
= name
;
1558 /* Perform language-specific initialization.
1559 This may set main_input_filename. */
1562 /* If the input doesn't start with a #line, use the input name
1563 as the official input file name. */
1564 if (main_input_filename
== 0)
1565 main_input_filename
= name
;
1567 /* Put an entry on the input file stack for the main input file. */
1569 = (struct file_stack
*) xmalloc (sizeof (struct file_stack
));
1570 input_file_stack
->next
= 0;
1571 input_file_stack
->name
= input_filename
;
1573 ASM_FILE_START (asm_out_file
);
1575 /* Output something to inform GDB that this compilation was by GCC. */
1576 #ifndef ASM_IDENTIFY_GCC
1577 fprintf (asm_out_file
, "gcc2_compiled.:\n");
1579 ASM_IDENTIFY_GCC (asm_out_file
);
1581 /* Don't let the first function fall at the same address
1582 as gcc_compiled., if profiling. */
1583 if (profile_flag
|| profile_block_flag
)
1584 assemble_zeros (UNITS_PER_WORD
);
1586 /* If dbx symbol table desired, initialize writing it
1587 and output the predefined types. */
1588 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
1589 if (write_symbols
== DBX_DEBUG
|| write_symbols
== XCOFF_DEBUG
)
1590 TIMEVAR (symout_time
, dbxout_init (asm_out_file
, main_input_filename
,
1593 #ifdef SDB_DEBUGGING_INFO
1594 if (write_symbols
== SDB_DEBUG
)
1595 TIMEVAR (symout_time
, sdbout_init (asm_out_file
, main_input_filename
,
1598 #ifdef DWARF_DEBUGGING_INFO
1599 if (write_symbols
== DWARF_DEBUG
)
1600 TIMEVAR (symout_time
, dwarfout_init (asm_out_file
, main_input_filename
));
1603 /* Initialize yet another pass. */
1605 init_final (main_input_filename
);
1607 start_time
= get_run_time ();
1609 /* Call the parser, which parses the entire file
1610 (calling rest_of_compilation for each function). */
1612 if (yyparse () != 0)
1613 if (errorcount
== 0)
1614 fprintf (stderr
, "Errors detected in input file (your bison.simple is out of date)");
1616 /* Compilation is now finished except for writing
1617 what's left of the symbol table output. */
1619 parse_time
+= get_run_time () - start_time
;
1621 parse_time
-= integration_time
;
1622 parse_time
-= varconst_time
;
1624 globals
= getdecls ();
1626 /* Really define vars that have had only a tentative definition.
1627 Really output inline functions that must actually be callable
1628 and have not been output so far. */
1631 int len
= list_length (globals
);
1632 tree
*vec
= (tree
*) alloca (sizeof (tree
) * len
);
1636 /* Process the decls in reverse order--earliest first.
1637 Put them into VEC from back to front, then take out from front. */
1639 for (i
= 0, decl
= globals
; i
< len
; i
++, decl
= TREE_CHAIN (decl
))
1640 vec
[len
- i
- 1] = decl
;
1642 for (i
= 0; i
< len
; i
++)
1645 if (TREE_CODE (decl
) == VAR_DECL
&& TREE_STATIC (decl
)
1646 && ! TREE_ASM_WRITTEN (decl
))
1648 /* Don't write out static consts, unless we used them.
1649 (This used to write them out only if the address was
1650 taken, but that was wrong; if the variable was simply
1651 referred to, it still needs to exist or else it will
1652 be undefined in the linker.) */
1653 if (! TREE_READONLY (decl
)
1654 || TREE_PUBLIC (decl
)
1656 || TREE_ADDRESSABLE (decl
)
1657 || TREE_ADDRESSABLE (DECL_ASSEMBLER_NAME (decl
)))
1658 rest_of_decl_compilation (decl
, 0, 1, 1);
1660 /* Cancel the RTL for this decl so that, if debugging info
1661 output for global variables is still to come,
1662 this one will be omitted. */
1663 DECL_RTL (decl
) = NULL
;
1666 if (TREE_CODE (decl
) == FUNCTION_DECL
1667 && ! TREE_ASM_WRITTEN (decl
)
1668 && DECL_INITIAL (decl
) != 0
1669 && (TREE_ADDRESSABLE (decl
)
1670 || TREE_ADDRESSABLE (DECL_ASSEMBLER_NAME (decl
)))
1671 && ! TREE_EXTERNAL (decl
))
1672 output_inline_function (decl
);
1674 /* Warn about any function
1675 declared static but not defined.
1676 We don't warn about variables,
1677 because many programs have static variables
1678 that exist only to get some text into the object file. */
1681 || (DECL_NAME (decl
) && TREE_USED (DECL_NAME (decl
))))
1682 && TREE_CODE (decl
) == FUNCTION_DECL
1683 && DECL_INITIAL (decl
) == 0
1684 && TREE_EXTERNAL (decl
)
1685 && ! TREE_PUBLIC (decl
))
1686 warning_with_decl (decl
, "`%s' declared `static' but never defined");
1687 /* Warn about static fns or vars defined but not used,
1688 but not about inline functions
1689 since unused inline statics is normal practice. */
1691 && (TREE_CODE (decl
) == FUNCTION_DECL
1692 || TREE_CODE (decl
) == VAR_DECL
)
1693 && ! TREE_EXTERNAL (decl
)
1694 && ! TREE_PUBLIC (decl
)
1695 && ! TREE_USED (decl
)
1696 && ! TREE_INLINE (decl
)
1697 /* The TREE_USED bit for file-scope decls
1698 is kept in the identifier, to handle multiple
1699 external decls in different scopes. */
1700 && ! TREE_USED (DECL_NAME (decl
)))
1701 warning_with_decl (decl
, "`%s' defined but not used");
1703 #ifdef SDB_DEBUGGING_INFO
1704 /* The COFF linker can move initialized global vars to the end.
1705 And that can screw up the symbol ordering.
1706 By putting the symbols in that order to begin with,
1707 we avoid a problem. mcsun!unido!fauern!tumuc!pes@uunet.uu.net. */
1708 if (write_symbols
== SDB_DEBUG
&& TREE_CODE (decl
) == VAR_DECL
1709 && TREE_PUBLIC (decl
) && DECL_INITIAL (decl
)
1710 && DECL_RTL (decl
) != 0)
1711 TIMEVAR (symout_time
, sdbout_symbol (decl
, 0));
1713 /* Output COFF information for non-global
1714 file-scope initialized variables. */
1715 if (write_symbols
== SDB_DEBUG
1716 && TREE_CODE (decl
) == VAR_DECL
1717 && DECL_INITIAL (decl
)
1718 && DECL_RTL (decl
) != 0
1719 && GET_CODE (DECL_RTL (decl
)) == MEM
)
1720 TIMEVAR (symout_time
, sdbout_toplevel_data (decl
));
1721 #endif /* SDB_DEBUGGING_INFO */
1722 #ifdef DWARF_DEBUGGING_INFO
1723 /* Output DWARF information for file-scope tenative data object
1724 declarations, file-scope (extern) function declarations (which
1725 had no corresponding body) and file-scope tagged type declarations
1726 and definitions which have not yet been forced out. */
1728 if (write_symbols
== DWARF_DEBUG
1729 && (TREE_CODE (decl
) != FUNCTION_DECL
|| !DECL_INITIAL (decl
)))
1730 TIMEVAR (symout_time
, dwarfout_file_scope_decl (decl
, 1));
1735 /* Do dbx symbols */
1736 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
1737 if (write_symbols
== DBX_DEBUG
|| write_symbols
== XCOFF_DEBUG
)
1738 TIMEVAR (symout_time
,
1740 dbxout_finish (asm_out_file
, main_input_filename
);
1744 #ifdef DWARF_DEBUGGING_INFO
1745 if (write_symbols
== DWARF_DEBUG
)
1746 TIMEVAR (symout_time
,
1752 /* Output some stuff at end of file if nec. */
1754 end_final (main_input_filename
);
1757 ASM_FILE_END (asm_out_file
);
1760 after_finish_compilation
:
1762 /* Language-specific end of compilation actions. */
1766 /* Close the dump files. */
1768 if (flag_gen_aux_info
)
1770 fclose (aux_info_file
);
1772 unlink (aux_info_file_name
);
1776 fclose (rtl_dump_file
);
1779 fclose (jump_opt_dump_file
);
1782 fclose (cse_dump_file
);
1785 fclose (loop_dump_file
);
1788 fclose (cse2_dump_file
);
1791 fclose (flow_dump_file
);
1795 dump_combine_total_stats (combine_dump_file
);
1796 fclose (combine_dump_file
);
1800 fclose (sched_dump_file
);
1803 fclose (local_reg_dump_file
);
1805 if (global_reg_dump
)
1806 fclose (global_reg_dump_file
);
1809 fclose (sched2_dump_file
);
1812 fclose (jump2_opt_dump_file
);
1815 fclose (dbr_sched_dump_file
);
1819 fclose (stack_reg_dump_file
);
1822 /* Close non-debugging input and output files. Take special care to note
1823 whether fclose returns an error, since the pages might still be on the
1824 buffer chain while the file is open. */
1827 if (ferror (asm_out_file
) != 0 || fclose (asm_out_file
) != 0)
1828 fatal_io_error (asm_file_name
);
1830 /* Print the times. */
1834 fprintf (stderr
,"\n");
1835 print_time ("parse", parse_time
);
1836 print_time ("integration", integration_time
);
1837 print_time ("jump", jump_time
);
1838 print_time ("cse", cse_time
);
1839 print_time ("loop", loop_time
);
1840 print_time ("cse2", cse2_time
);
1841 print_time ("flow", flow_time
);
1842 print_time ("combine", combine_time
);
1843 print_time ("sched", sched_time
);
1844 print_time ("local-alloc", local_alloc_time
);
1845 print_time ("global-alloc", global_alloc_time
);
1846 print_time ("sched2", sched2_time
);
1847 print_time ("dbranch", dbr_sched_time
);
1848 print_time ("shorten-branch", shorten_branch_time
);
1849 print_time ("stack-reg", stack_reg_time
);
1850 print_time ("final", final_time
);
1851 print_time ("varconst", varconst_time
);
1852 print_time ("symout", symout_time
);
1853 print_time ("dump", dump_time
);
1857 /* This is called from various places for FUNCTION_DECL, VAR_DECL,
1858 and TYPE_DECL nodes.
1860 This does nothing for local (non-static) variables.
1861 Otherwise, it sets up the RTL and outputs any assembler code
1862 (label definition, storage allocation and initialization).
1864 DECL is the declaration. If ASMSPEC is nonzero, it specifies
1865 the assembler symbol name to be used. TOP_LEVEL is nonzero
1866 if this declaration is not within a function. */
1869 rest_of_decl_compilation (decl
, asmspec
, top_level
, at_end
)
1875 /* Declarations of variables, and of functions defined elsewhere. */
1877 /* Forward declarations for nested functions are not "external",
1878 but we need to treat them as if they were. */
1879 if (TREE_STATIC (decl
) || TREE_EXTERNAL (decl
)
1880 || TREE_CODE (decl
) == FUNCTION_DECL
)
1881 TIMEVAR (varconst_time
,
1883 make_decl_rtl (decl
, asmspec
, top_level
);
1884 /* Don't output anything
1885 when a tentative file-scope definition is seen.
1886 But at end of compilation, do output code for them. */
1887 if (! (! at_end
&& top_level
1888 && (DECL_INITIAL (decl
) == 0
1889 || DECL_INITIAL (decl
) == error_mark_node
)))
1890 assemble_variable (decl
, top_level
, at_end
);
1892 else if (TREE_REGDECL (decl
) && asmspec
!= 0)
1894 if (decode_reg_name (asmspec
) >= 0)
1896 DECL_RTL (decl
) = 0;
1897 make_decl_rtl (decl
, asmspec
, top_level
);
1900 error ("invalid register name `%s' for register variable", asmspec
);
1902 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
1903 else if ((write_symbols
== DBX_DEBUG
|| write_symbols
== XCOFF_DEBUG
)
1904 && TREE_CODE (decl
) == TYPE_DECL
)
1905 TIMEVAR (symout_time
, dbxout_symbol (decl
, 0));
1907 #ifdef SDB_DEBUGGING_INFO
1908 else if (write_symbols
== SDB_DEBUG
&& top_level
1909 && TREE_CODE (decl
) == TYPE_DECL
)
1910 TIMEVAR (symout_time
, sdbout_symbol (decl
, 0));
1914 /* Called after finishing a record, union or enumeral type. */
1917 rest_of_type_compilation (type
, toplev
)
1921 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
1922 if (write_symbols
== DBX_DEBUG
|| write_symbols
== XCOFF_DEBUG
)
1923 TIMEVAR (symout_time
, dbxout_symbol (TYPE_STUB_DECL (type
), !toplev
));
1925 #ifdef SDB_DEBUGGING_INFO
1926 if (write_symbols
== SDB_DEBUG
)
1927 TIMEVAR (symout_time
, sdbout_symbol (TYPE_STUB_DECL (type
), !toplev
));
1931 /* This is called from finish_function (within yyparse)
1932 after each top-level definition is parsed.
1933 It is supposed to compile that function or variable
1934 and output the assembler code for it.
1935 After we return, the tree storage is freed. */
1938 rest_of_compilation (decl
)
1942 int start_time
= get_run_time ();
1944 /* Nonzero if we have saved the original DECL_INITIAL of the function,
1945 to be restored after we finish compiling the function
1946 (for use when compiling inline calls to this function). */
1947 tree saved_block_tree
= 0;
1949 /* If we are reconsidering an inline function
1950 at the end of compilation, skip the stuff for making it inline. */
1952 if (DECL_SAVED_INSNS (decl
) == 0)
1954 int specd
= TREE_INLINE (decl
);
1957 /* If requested, consider whether to make this function inline. */
1958 if (specd
|| flag_inline_functions
)
1959 TIMEVAR (integration_time
,
1961 lose
= function_cannot_inline_p (decl
);
1964 if (warn_inline
&& specd
)
1965 warning_with_decl (decl
, lose
);
1966 TREE_INLINE (decl
) = 0;
1969 TREE_INLINE (decl
) = 1;
1972 insns
= get_insns ();
1974 /* Dump the rtl code if we are dumping rtl. */
1979 fprintf (rtl_dump_file
, "\n;; Function %s\n\n",
1980 IDENTIFIER_POINTER (DECL_NAME (decl
)));
1981 if (DECL_SAVED_INSNS (decl
))
1982 fprintf (rtl_dump_file
, ";; (integrable)\n\n");
1983 print_rtl (rtl_dump_file
, insns
);
1984 fflush (rtl_dump_file
);
1987 /* If function is inline, and we don't yet know whether to
1988 compile it by itself, defer decision till end of compilation.
1989 finish_compilation will call rest_of_compilation again
1990 for those functions that need to be output. */
1992 if (TREE_INLINE (decl
)
1993 && ((! TREE_PUBLIC (decl
) && ! TREE_ADDRESSABLE (decl
)
1994 && ! flag_keep_inline_functions
)
1995 || TREE_EXTERNAL (decl
)))
1997 TIMEVAR (integration_time
, save_for_inline_nocopy (decl
));
1998 goto exit_rest_of_compilation
;
2001 /* If we have to compile the function now, save its rtl
2002 so that its compilation will not affect what others get. */
2003 if (TREE_INLINE (decl
))
2005 saved_block_tree
= DECL_INITIAL (decl
);
2006 TIMEVAR (integration_time
, save_for_inline_copying (decl
));
2010 /* Suppress warnings for unused static functions
2011 defined (not just declared) in system headers. */
2012 if (in_system_header
&& TREE_STATIC (decl
) && !TREE_INLINE (decl
))
2013 TREE_USED (decl
) = 1;
2015 TREE_ASM_WRITTEN (decl
) = 1;
2017 /* Now that integrate will no longer see our rtl, we need not distinguish
2018 between the return value of this function and the return value of called
2020 rtx_equal_function_value_matters
= 0;
2022 if (rtl_dump_and_exit
|| flag_syntax_only
)
2024 goto exit_rest_of_compilation
;
2027 /* From now on, allocate rtl in current_obstack, not in saveable_obstack.
2028 Note that that may have been done above, in save_for_inline_copying.
2029 The call to resume_temporary_allocation near the end of this function
2030 goes back to the usual state of affairs. */
2032 rtl_in_current_obstack ();
2035 /* If we are doing position-independent code generation, now
2036 is the time to output special prologues and epilogues.
2037 We do not want to do this earlier, because it just clutters
2038 up inline functions with meaningless insns. */
2043 insns
= get_insns ();
2045 /* Copy any shared structure that should not be shared. */
2047 unshare_all_rtl (insns
);
2049 /* Instantiate all virtual registers. */
2051 instantiate_virtual_regs (current_function_decl
, get_insns ());
2053 /* See if we have allocated stack slots that are not directly addressable.
2054 If so, scan all the insns and create explicit address computation
2055 for all references to such slots. */
2056 /* fixup_stack_slots (); */
2058 /* Do jump optimization the first time, if -opt.
2059 Also do it if -W, but in that case it doesn't change the rtl code,
2060 it only computes whether control can drop off the end of the function. */
2062 if (optimize
> 0 || extra_warnings
|| warn_return_type
2063 /* If function is `volatile', we should warn if it tries to return. */
2064 || TREE_THIS_VOLATILE (decl
))
2066 TIMEVAR (jump_time
, reg_scan (insns
, max_reg_num (), 0));
2067 TIMEVAR (jump_time
, jump_optimize (insns
, 0, 0, 1));
2070 /* Dump rtl code after jump, if we are doing that. */
2075 fprintf (jump_opt_dump_file
, "\n;; Function %s\n\n",
2076 IDENTIFIER_POINTER (DECL_NAME (decl
)));
2077 print_rtl (jump_opt_dump_file
, insns
);
2078 fflush (jump_opt_dump_file
);
2081 /* Perform common subexpression elimination.
2082 Nonzero value from `cse_main' means that jumps were simplified
2083 and some code may now be unreachable, so do
2084 jump optimization again. */
2089 fprintf (cse_dump_file
, "\n;; Function %s\n\n",
2090 IDENTIFIER_POINTER (DECL_NAME (decl
)));
2095 TIMEVAR (cse_time
, reg_scan (insns
, max_reg_num (), 1));
2097 if (flag_thread_jumps
)
2098 /* Hacks by tiemann & kenner. */
2099 TIMEVAR (jump_time
, thread_jumps (insns
, max_reg_num (), 0));
2101 TIMEVAR (cse_time
, tem
= cse_main (insns
, max_reg_num (),
2103 TIMEVAR (cse_time
, delete_dead_from_cse (insns
, max_reg_num ()));
2106 TIMEVAR (jump_time
, jump_optimize (insns
, 0, 0, 0));
2109 /* Dump rtl code after cse, if we are doing that. */
2114 print_rtl (cse_dump_file
, insns
);
2115 fflush (cse_dump_file
);
2121 fprintf (loop_dump_file
, "\n;; Function %s\n\n",
2122 IDENTIFIER_POINTER (DECL_NAME (decl
)));
2125 /* Move constant computations out of loops. */
2131 loop_optimize (insns
, loop_dump
? loop_dump_file
: 0);
2135 /* Dump rtl code after loop opt, if we are doing that. */
2140 print_rtl (loop_dump_file
, insns
);
2141 fflush (loop_dump_file
);
2147 fprintf (cse2_dump_file
, "\n;; Function %s\n\n",
2148 IDENTIFIER_POINTER (DECL_NAME (decl
)));
2151 if (optimize
> 0 && flag_rerun_cse_after_loop
)
2153 TIMEVAR (cse2_time
, reg_scan (insns
, max_reg_num (), 0));
2155 TIMEVAR (cse2_time
, tem
= cse_main (insns
, max_reg_num (),
2156 1, cse2_dump_file
));
2158 TIMEVAR (jump_time
, jump_optimize (insns
, 0, 0, 0));
2161 if (optimize
> 0 && flag_thread_jumps
)
2162 /* This pass of jump threading straightens out code
2163 that was kinked by loop optimization. */
2164 TIMEVAR (jump_time
, thread_jumps (insns
, max_reg_num (), 0));
2166 /* Dump rtl code after cse, if we are doing that. */
2171 print_rtl (cse2_dump_file
, insns
);
2172 fflush (cse2_dump_file
);
2175 /* We are no longer anticipating cse in this function, at least. */
2177 cse_not_expected
= 1;
2179 /* Now we choose between stupid (pcc-like) register allocation
2180 (if we got the -noreg switch and not -opt)
2181 and smart register allocation. */
2183 if (optimize
> 0) /* Stupid allocation probably won't work */
2184 obey_regdecls
= 0; /* if optimizations being done. */
2188 /* Print function header into flow dump now
2189 because doing the flow analysis makes some of the dump. */
2194 fprintf (flow_dump_file
, "\n;; Function %s\n\n",
2195 IDENTIFIER_POINTER (DECL_NAME (decl
)));
2202 regclass (insns
, max_reg_num ());
2203 stupid_life_analysis (insns
, max_reg_num (),
2209 /* Do control and data flow analysis,
2210 and write some of the results to dump file. */
2212 TIMEVAR (flow_time
, flow_analysis (insns
, max_reg_num (),
2214 if (warn_uninitialized
)
2216 uninitialized_vars_warning (DECL_INITIAL (decl
));
2217 setjmp_args_warning ();
2221 /* Dump rtl after flow analysis. */
2226 print_rtl (flow_dump_file
, insns
);
2227 fflush (flow_dump_file
);
2230 /* If -opt, try combining insns through substitution. */
2233 TIMEVAR (combine_time
, combine_instructions (insns
, max_reg_num ()));
2235 /* Dump rtl code after insn combination. */
2240 fprintf (combine_dump_file
, "\n;; Function %s\n\n",
2241 IDENTIFIER_POINTER (DECL_NAME (decl
)));
2242 dump_combine_stats (combine_dump_file
);
2243 print_rtl (combine_dump_file
, insns
);
2244 fflush (combine_dump_file
);
2247 /* Print function header into sched dump now
2248 because doing the sched analysis makes some of the dump. */
2253 fprintf (sched_dump_file
, "\n;; Function %s\n\n",
2254 IDENTIFIER_POINTER (DECL_NAME (decl
)));
2257 if (optimize
> 0 && flag_schedule_insns
)
2259 /* Do control and data sched analysis,
2260 and write some of the results to dump file. */
2262 TIMEVAR (sched_time
, schedule_insns (sched_dump_file
));
2265 /* Dump rtl after instruction scheduling. */
2270 print_rtl (sched_dump_file
, insns
);
2271 fflush (sched_dump_file
);
2274 /* Unless we did stupid register allocation,
2275 allocate pseudo-regs that are used only within 1 basic block. */
2278 TIMEVAR (local_alloc_time
,
2280 regclass (insns
, max_reg_num ());
2284 /* Dump rtl code after allocating regs within basic blocks. */
2289 fprintf (local_reg_dump_file
, "\n;; Function %s\n\n",
2290 IDENTIFIER_POINTER (DECL_NAME (decl
)));
2291 dump_flow_info (local_reg_dump_file
);
2292 dump_local_alloc (local_reg_dump_file
);
2293 print_rtl (local_reg_dump_file
, insns
);
2294 fflush (local_reg_dump_file
);
2297 if (global_reg_dump
)
2299 fprintf (global_reg_dump_file
, "\n;; Function %s\n\n",
2300 IDENTIFIER_POINTER (DECL_NAME (decl
))));
2302 /* Unless we did stupid register allocation,
2303 allocate remaining pseudo-regs, then do the reload pass
2304 fixing up any insns that are invalid. */
2306 TIMEVAR (global_alloc_time
,
2309 global_alloc (global_reg_dump
? global_reg_dump_file
: 0);
2312 global_reg_dump
? global_reg_dump_file
: 0);
2315 if (global_reg_dump
)
2318 dump_global_regs (global_reg_dump_file
);
2319 print_rtl (global_reg_dump_file
, insns
);
2320 fflush (global_reg_dump_file
);
2323 reload_completed
= 1;
2325 if (optimize
> 0 && flag_schedule_insns_after_reload
)
2330 fprintf (sched2_dump_file
, "\n;; Function %s\n\n",
2331 IDENTIFIER_POINTER (DECL_NAME (decl
)));
2334 /* Do control and data sched analysis again,
2335 and write some more of the results to dump file. */
2337 TIMEVAR (sched2_time
, schedule_insns (sched2_dump_file
));
2339 /* Dump rtl after post-reorder instruction scheduling. */
2344 print_rtl (sched2_dump_file
, insns
);
2345 fflush (sched2_dump_file
);
2349 #ifdef LEAF_REGISTERS
2351 if (optimize
> 0 && only_leaf_regs_used () && leaf_function_p ())
2355 /* One more attempt to remove jumps to .+1
2356 left by dead-store-elimination.
2357 Also do cross-jumping this time
2358 and delete no-op move insns. */
2362 TIMEVAR (jump_time
, jump_optimize (insns
, 1, 1, 0));
2365 /* Dump rtl code after jump, if we are doing that. */
2370 fprintf (jump2_opt_dump_file
, "\n;; Function %s\n\n",
2371 IDENTIFIER_POINTER (DECL_NAME (decl
)));
2372 print_rtl (jump2_opt_dump_file
, insns
);
2373 fflush (jump2_opt_dump_file
);
2376 /* If a scheduling pass for delayed branches is to be done,
2377 call the scheduling code. */
2380 if (optimize
> 0 && flag_delayed_branch
)
2382 TIMEVAR (dbr_sched_time
, dbr_schedule (insns
, dbr_sched_dump_file
));
2387 fprintf (dbr_sched_dump_file
, "\n;; Function %s\n\n",
2388 IDENTIFIER_POINTER (DECL_NAME (decl
)));
2389 print_rtl (dbr_sched_dump_file
, insns
);
2390 fflush (dbr_sched_dump_file
);
2397 /* Shorten branches. */
2398 TIMEVAR (shorten_branch_time
,
2400 shorten_branches (get_insns ());
2404 TIMEVAR (stack_reg_time
, reg_to_stack (insns
, stack_reg_dump_file
));
2409 fprintf (stack_reg_dump_file
, "\n;; Function %s\n\n",
2410 IDENTIFIER_POINTER (DECL_NAME (decl
)));
2411 print_rtl (stack_reg_dump_file
, insns
);
2412 fflush (stack_reg_dump_file
);
2417 /* Now turn the rtl into assembler code. */
2419 TIMEVAR (final_time
,
2424 /* Get the function's name, as described by its RTL.
2425 This may be different from the DECL_NAME name used
2426 in the source file. */
2428 x
= DECL_RTL (decl
);
2429 if (GET_CODE (x
) != MEM
)
2432 if (GET_CODE (x
) != SYMBOL_REF
)
2434 fnname
= XSTR (x
, 0);
2436 assemble_start_function (decl
, fnname
);
2437 final_start_function (insns
, asm_out_file
, optimize
);
2438 final (insns
, asm_out_file
, optimize
, 0);
2439 final_end_function (insns
, asm_out_file
, optimize
);
2440 assemble_end_function (decl
, fnname
);
2441 fflush (asm_out_file
);
2444 /* Write DBX symbols if requested */
2446 /* Note that for those inline functions where we don't initially
2447 know for certain that we will be generating an out-of-line copy,
2448 the first invocation of this routine (rest_of_compilation) will
2449 skip over this code by doing a `goto exit_rest_of_compilation;'.
2450 Later on, finish_compilation will call rest_of_compilation again
2451 for those inline functions that need to have out-of-line copies
2452 generated. During that call, we *will* be routed past here. */
2454 #ifdef DBX_DEBUGGING_INFO
2455 if (write_symbols
== DBX_DEBUG
)
2456 TIMEVAR (symout_time
, dbxout_function (decl
));
2459 #ifdef DWARF_DEBUGGING_INFO
2460 if (write_symbols
== DWARF_DEBUG
)
2461 TIMEVAR (symout_time
, dwarfout_file_scope_decl (decl
, 0));
2464 exit_rest_of_compilation
:
2466 /* In case the function was not output,
2467 don't leave any temporary anonymous types
2468 queued up for sdb output. */
2469 #ifdef SDB_DEBUGGING_INFO
2470 if (write_symbols
== SDB_DEBUG
)
2474 /* Put back the tree of subblocks from before we copied it.
2475 Code generation and the output of debugging info may have modified
2476 the copy, but the original is unchanged. */
2478 if (saved_block_tree
!= 0)
2479 DECL_INITIAL (decl
) = saved_block_tree
;
2481 reload_completed
= 0;
2483 /* Clear out the real_constant_chain before some of the rtx's
2484 it runs through become garbage. */
2486 clear_const_double_mem ();
2488 /* Cancel the effect of rtl_in_current_obstack. */
2490 resume_temporary_allocation ();
2492 /* The parsing time is all the time spent in yyparse
2493 *except* what is spent in this function. */
2495 parse_time
-= get_run_time () - start_time
;
2498 /* Entry point of cc1/c++. Decode command args, then call compile_file.
2499 Exit code is 35 if can't open files, 34 if fatal error,
2500 33 if had nonfatal errors, else success. */
2503 main (argc
, argv
, envp
)
2510 int flag_print_mem
= 0;
2511 int version_flag
= 0;
2514 /* save in case md file wants to emit args as a comment. */
2518 p
= argv
[0] + strlen (argv
[0]);
2519 while (p
!= argv
[0] && p
[-1] != '/') --p
;
2523 /* Get rid of any avoidable limit on stack size. */
2527 /* Set the stack limit huge so that alloca does not fail. */
2528 getrlimit (RLIMIT_STACK
, &rlim
);
2529 rlim
.rlim_cur
= rlim
.rlim_max
;
2530 setrlimit (RLIMIT_STACK
, &rlim
);
2532 #endif /* RLIMIT_STACK */
2534 signal (SIGFPE
, float_signal
);
2536 signal (SIGPIPE
, pipe_closed
);
2538 decl_printable_name
= decl_name
;
2539 lang_expand_expr
= (struct rtx_def
*(*)()) do_abort
;
2541 /* Initialize whether `char' is signed. */
2542 flag_signed_char
= DEFAULT_SIGNED_CHAR
;
2543 #ifdef DEFAULT_SHORT_ENUMS
2544 /* Initialize how much space enums occupy, by default. */
2545 flag_short_enums
= DEFAULT_SHORT_ENUMS
;
2548 /* Scan to see what optimization level has been specified. That will
2549 determine the default value of many flags. */
2550 for (i
= 1; i
< argc
; i
++)
2552 if (!strcmp (argv
[i
], "-O"))
2556 else if (argv
[i
][0] == '-' && argv
[i
][1] == 'O')
2558 /* Handle -O2, -O3, -O69, ... */
2559 char *p
= &argv
[i
][2];
2563 if (! (c
>= '0' && c
<= '9'))
2566 optimize
= atoi (&argv
[i
][2]);
2570 obey_regdecls
= (optimize
== 0);
2579 flag_thread_jumps
= 1;
2581 flag_delayed_branch
= 1;
2587 flag_cse_follow_jumps
= 1;
2588 flag_expensive_optimizations
= 1;
2589 flag_strength_reduce
= 1;
2590 flag_rerun_cse_after_loop
= 1;
2591 flag_caller_saves
= 1;
2592 #ifdef INSN_SCHEDULING
2593 flag_schedule_insns
= 1;
2594 flag_schedule_insns_after_reload
= 1;
2598 #ifdef OPTIMIZATION_OPTIONS
2599 /* Allow default optimizations to be specified on a per-machine basis. */
2600 OPTIMIZATION_OPTIONS (optimize
);
2603 /* Initialize register usage now so switches may override. */
2607 set_target_switch ("");
2609 for (i
= 1; i
< argc
; i
++)
2611 if (argv
[i
][0] == '-' && argv
[i
][1] != 0)
2613 register char *str
= argv
[i
] + 1;
2618 set_target_switch (&str
[1]);
2619 else if (!strcmp (str
, "dumpbase"))
2621 dump_base_name
= argv
[++i
];
2623 else if (str
[0] == 'd')
2625 register char *p
= &str
[1];
2633 global_reg_dump
= 1;
2639 cse_dump
= 1, cse2_dump
= 1;
2657 global_reg_dump
= 1;
2675 flag_print_asm_name
= 1;
2697 rtl_dump_and_exit
= 1;
2701 else if (str
[0] == 'f')
2704 register char *p
= &str
[1];
2707 /* Some kind of -f option.
2708 P's value is the option sans `-f'.
2709 Search for it in the table of options. */
2712 !found
&& j
< sizeof (f_options
) / sizeof (f_options
[0]);
2715 if (!strcmp (p
, f_options
[j
].string
))
2717 *f_options
[j
].variable
= f_options
[j
].on_value
;
2718 /* A goto here would be cleaner,
2719 but breaks the vax pcc. */
2722 if (p
[0] == 'n' && p
[1] == 'o' && p
[2] == '-'
2723 && ! strcmp (p
+3, f_options
[j
].string
))
2725 *f_options
[j
].variable
= ! f_options
[j
].on_value
;
2732 else if (!strncmp (p
, "fixed-", 6))
2733 fix_register (&p
[6], 1, 1);
2734 else if (!strncmp (p
, "call-used-", 10))
2735 fix_register (&p
[10], 0, 1);
2736 else if (!strncmp (p
, "call-saved-", 11))
2737 fix_register (&p
[11], 0, 0);
2738 else if (! lang_decode_option (argv
[i
]))
2739 error ("Invalid option `%s'", argv
[i
]);
2741 else if (str
[0] == 'O')
2743 register char *p
= str
+1;
2744 while (*p
&& *p
>= '0' && *p
<= '9')
2749 error ("Invalid option `%s'", argv
[i
]);
2751 else if (!strcmp (str
, "pedantic"))
2753 else if (!strcmp (str
, "pedantic-errors"))
2754 flag_pedantic_errors
= pedantic
= 1;
2755 else if (lang_decode_option (argv
[i
]))
2757 else if (!strcmp (str
, "quiet"))
2759 else if (!strcmp (str
, "version"))
2761 else if (!strcmp (str
, "w"))
2762 inhibit_warnings
= 1;
2763 else if (!strcmp (str
, "W"))
2766 warn_uninitialized
= 1;
2768 else if (str
[0] == 'W')
2771 register char *p
= &str
[1];
2774 /* Some kind of -W option.
2775 P's value is the option sans `-W'.
2776 Search for it in the table of options. */
2779 !found
&& j
< sizeof (W_options
) / sizeof (W_options
[0]);
2782 if (!strcmp (p
, W_options
[j
].string
))
2784 *W_options
[j
].variable
= W_options
[j
].on_value
;
2785 /* A goto here would be cleaner,
2786 but breaks the vax pcc. */
2789 if (p
[0] == 'n' && p
[1] == 'o' && p
[2] == '-'
2790 && ! strcmp (p
+3, W_options
[j
].string
))
2792 *W_options
[j
].variable
= ! W_options
[j
].on_value
;
2799 else if (!strncmp (p
, "id-clash-", 9))
2805 if (*endp
>= '0' && *endp
<= '9')
2808 error ("Invalid option `%s'", argv
[i
]);
2811 id_clash_len
= atoi (str
+ 10);
2814 error ("Invalid option `%s'", argv
[i
]);
2816 else if (!strcmp (str
, "p"))
2818 else if (!strcmp (str
, "a"))
2820 #if !defined (BLOCK_PROFILER) || !defined (FUNCTION_BLOCK_PROFILER)
2821 warning ("`-a' option (basic block profile) not supported");
2823 profile_block_flag
= 1;
2826 else if (str
[0] == 'g')
2833 while (*p
&& (*p
< '0' || *p
> '9'))
2837 while (*q
&& (*q
>= '0' && *q
<= '9'))
2842 level
= 2; /* default debugging info level */
2843 if (*q
|| level
> 3)
2845 warning ("invalid debug level specification in option: `-%s'",
2847 warning ("no debugging information will be generated");
2851 /* If more than one debugging type is supported,
2852 you must define PREFERRED_DEBUGGING_TYPE
2853 to choose a format in a system-dependent way. */
2854 #if 1 < (defined (DBX_DEBUGGING_INFO) + defined (SDB_DEBUGGING_INFO) \
2855 + defined (DWARF_DEBUGGING_INFO) + defined (XCOFF_DEBUGGING_INFO))
2856 #ifdef PREFERRED_DEBUGGING_TYPE
2857 if (!strncmp (str
, "ggdb", len
))
2858 write_symbols
= PREFERRED_DEBUGGING_TYPE
;
2859 #else /* no PREFERRED_DEBUGGING_TYPE */
2860 You Lose
! You must define PREFERRED_DEBUGGING_TYPE
!
2861 #endif /* no PREFERRED_DEBUGGING_TYPE */
2862 #endif /* More than one debugger format enabled. */
2863 #ifdef DBX_DEBUGGING_INFO
2864 if (write_symbols
!= NO_DEBUG
)
2866 else if (!strncmp (str
, "ggdb", len
))
2867 write_symbols
= DBX_DEBUG
;
2868 else if (!strncmp (str
, "gstabs", len
))
2869 write_symbols
= DBX_DEBUG
;
2871 /* Always enable extensions for -ggdb or -gstabs+,
2872 always disable for -gstabs.
2873 For plain -g, use system-specific default. */
2874 if (write_symbols
== DBX_DEBUG
&& !strncmp (str
, "ggdb", len
)
2876 use_gdb_dbx_extensions
= 1;
2877 else if (write_symbols
== DBX_DEBUG
&& !strcmp (str
, "gstabs+"))
2878 use_gdb_dbx_extensions
= 1;
2879 else if (write_symbols
== DBX_DEBUG
2880 && !strncmp (str
, "gstabs", len
) && len
>= 2)
2881 use_gdb_dbx_extensions
= 0;
2883 use_gdb_dbx_extensions
= DEFAULT_GDB_EXTENSIONS
;
2884 #endif /* DBX_DEBUGGING_INFO */
2885 #ifdef DWARF_DEBUGGING_INFO
2886 if (write_symbols
!= NO_DEBUG
)
2888 else if (!strncmp (str
, "ggdb", len
))
2889 write_symbols
= DWARF_DEBUG
;
2890 /* For orthogonality. */
2891 else if (!strncmp (str
, "gdwarf", len
))
2892 write_symbols
= DWARF_DEBUG
;
2894 #ifdef SDB_DEBUGGING_INFO
2895 if (write_symbols
!= NO_DEBUG
)
2897 else if (!strncmp (str
, "ggdb", len
))
2898 write_symbols
= SDB_DEBUG
;
2899 else if (!strncmp (str
, "gcoff", len
))
2900 write_symbols
= SDB_DEBUG
;
2901 #endif /* SDB_DEBUGGING_INFO */
2902 #ifdef XCOFF_DEBUGGING_INFO
2903 if (write_symbols
!= NO_DEBUG
)
2905 else if (!strncmp (str
, "ggdb", len
))
2906 write_symbols
= XCOFF_DEBUG
;
2907 else if (!strncmp (str
, "gxcoff", len
))
2908 write_symbols
= XCOFF_DEBUG
;
2910 /* Always enable extensions for -ggdb,
2911 always disable for -gxcoff.
2912 For plain -g, use system-specific default. */
2913 if (write_symbols
== XCOFF_DEBUG
&& !strncmp (str
, "ggdb", len
)
2915 use_gdb_dbx_extensions
= 1;
2916 else if (write_symbols
== DBX_DEBUG
2917 && !strncmp (str
, "gxcoff", len
) && len
>= 2)
2918 use_gdb_dbx_extensions
= 0;
2920 use_gdb_dbx_extensions
= DEFAULT_GDB_EXTENSIONS
;
2922 if (write_symbols
== NO_DEBUG
)
2923 warning ("`-%s' option not supported on this version of GCC", str
);
2924 else if (level
== 0)
2925 write_symbols
= NO_DEBUG
;
2927 debug_info_level
= (enum debug_info_level
) level
;
2929 else if (!strcmp (str
, "o"))
2931 asm_file_name
= argv
[++i
];
2933 else if (str
[0] == 'G')
2935 g_switch_set
= TRUE
;
2936 g_switch_value
= atoi ((str
[1] != '\0') ? str
+1 : argv
[++i
]);
2938 else if (!strncmp (str
, "aux-info", 8))
2940 flag_gen_aux_info
= 1;
2941 aux_info_file_name
= (str
[8] != '\0' ? str
+8 : argv
[++i
]);
2944 error ("Invalid option `%s'", argv
[i
]);
2946 else if (argv
[i
][0] == '+')
2948 if (lang_decode_option (argv
[i
]))
2951 error ("Invalid option `%s'", argv
[i
]);
2957 /* Inlining does not work if not optimizing,
2958 so force it not to be done. */
2965 #ifdef OVERRIDE_OPTIONS
2966 /* Some machines may reject certain combinations of options. */
2970 /* Unrolling all loops implies that standard loop unrolling must also
2972 if (flag_unroll_all_loops
)
2973 flag_unroll_loops
= 1;
2974 /* Loop unrolling requires that strength_reduction be on also. Silently
2975 turn on strength reduction here if it isn't already on. Also, the loop
2976 unrolling code assumes that cse will be run after loop, so that must
2977 be turned on also. */
2978 if (flag_unroll_loops
)
2980 flag_strength_reduce
= 1;
2981 flag_rerun_cse_after_loop
= 1;
2984 /* Warn about options that are not supported on this machine. */
2985 #ifndef INSN_SCHEDULING
2986 if (flag_schedule_insns
|| flag_schedule_insns_after_reload
)
2987 warning ("instruction scheduling not supported on this target machine");
2990 if (flag_delayed_branch
)
2991 warning ("this target machine does not have delayed branches");
2994 /* If we are in verbose mode, write out the version and maybe all the
2995 option flags in use. */
2998 fprintf (stderr
, "%s version %s", language_string
, version_string
);
2999 #ifdef TARGET_VERSION
3004 #define __VERSION__ "[unknown]"
3006 fprintf (stderr
, " compiled by GNU C version %s.\n", __VERSION__
);
3008 fprintf (stderr
, " compiled by CC.\n");
3011 print_switch_values ();
3014 /* Now that register usage is specified, convert it to HARD_REG_SETs. */
3017 compile_file (filename
);
3022 char *lim
= (char *) sbrk (0);
3024 fprintf (stderr
, "Data size %d.\n",
3025 (int) lim
- (int) &environ
);
3029 system ("ps -l 1>&2");
3032 #endif /* not USG */
3034 #endif /* not VMS */
3037 exit (FATAL_EXIT_CODE
);
3039 exit (FATAL_EXIT_CODE
);
3040 exit (SUCCESS_EXIT_CODE
);
3044 /* Decode -m switches. */
3046 /* Here is a table, controlled by the tm.h file, listing each -m switch
3047 and which bits in `target_switches' it should set or clear.
3048 If VALUE is positive, it is bits to set.
3049 If VALUE is negative, -VALUE is bits to clear.
3050 (The sign bit is not used so there is no confusion.) */
3052 struct {char *name
; int value
;} target_switches
[]
3055 /* This table is similar, but allows the switch to have a value. */
3057 #ifdef TARGET_OPTIONS
3058 struct {char *prefix
; char ** variable
;} target_options
[]
3062 /* Decode the switch -mNAME. */
3065 set_target_switch (name
)
3071 for (j
= 0; j
< sizeof target_switches
/ sizeof target_switches
[0]; j
++)
3072 if (!strcmp (target_switches
[j
].name
, name
))
3074 if (target_switches
[j
].value
< 0)
3075 target_flags
&= ~-target_switches
[j
].value
;
3077 target_flags
|= target_switches
[j
].value
;
3081 #ifdef TARGET_OPTIONS
3083 for (j
= 0; j
< sizeof target_options
/ sizeof target_options
[0]; j
++)
3085 int len
= strlen (target_options
[j
].prefix
);
3086 if (!strncmp (target_options
[j
].prefix
, name
, len
))
3088 *target_options
[j
].variable
= name
+ len
;
3095 error ("Invalid option `%s'", name
);
3098 /* Variable used for communication between the following two routines. */
3100 static int line_position
;
3102 /* Print an option value and adjust the position in the line. */
3105 print_single_switch (type
, name
)
3108 fprintf (stderr
, " %s%s", type
, name
);
3110 line_position
+= strlen (type
) + strlen (name
) + 1;
3112 if (line_position
> 65)
3114 fprintf (stderr
, "\n\t");
3119 /* Print default target switches for -version. */
3122 print_switch_values ()
3126 fprintf (stderr
, "enabled:");
3129 for (j
= 0; j
< sizeof f_options
/ sizeof f_options
[0]; j
++)
3130 if (*f_options
[j
].variable
== f_options
[j
].on_value
)
3131 print_single_switch ("-f", f_options
[j
].string
);
3133 for (j
= 0; j
< sizeof W_options
/ sizeof W_options
[0]; j
++)
3134 if (*W_options
[j
].variable
== W_options
[j
].on_value
)
3135 print_single_switch ("-W", W_options
[j
].string
);
3137 for (j
= 0; j
< sizeof target_switches
/ sizeof target_switches
[0]; j
++)
3138 if (target_switches
[j
].name
[0] != '\0'
3139 && target_switches
[j
].value
> 0
3140 && ((target_switches
[j
].value
& target_flags
)
3141 == target_switches
[j
].value
))
3142 print_single_switch ("-m", target_switches
[j
].name
);
3144 fprintf (stderr
, "\n");