1 /* Top level of GNU C compiler
2 Copyright (C) 1987, 88, 89, 92, 93, 94, 1995 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. */
20 /* This is the top level of cc1/c++.
21 It parses command args, opens files, invokes the various passes
22 in the proper order, and counts the time used by each.
23 Error messages and low-level interface to malloc also handled here. */
34 #include <sys/types.h>
41 #include <sys/param.h>
42 /* This is for hpux. It is a real screw. They should change hpux. */
44 #include <sys/times.h>
45 #include <time.h> /* Correct for hpux at least. Is it good on other USG? */
46 #undef FFS /* Some systems define this in param.h. */
50 #include <sys/resource.h>
59 #include "insn-attr.h"
65 #ifdef XCOFF_DEBUGGING_INFO
70 /* The extra parameters substantially improve the I/O performance. */
72 vms_fopen (fname, type)
76 /* The <stdio.h> in the gcc-vms-1.42 distribution prototypes fopen with two
77 fixed arguments, which matches ANSI's specification but not VAXCRTL's
78 pre-ANSI implementation. This hack circumvents the mismatch problem. */
79 FILE *(*vmslib_fopen)() = (FILE *(*)()) fopen;
82 return (*vmslib_fopen) (fname, type, "mbc=32",
83 "deq=64", "fop=tef", "shr=nil");
85 return (*vmslib_fopen) (fname, type, "mbc=32");
87 #define fopen vms_fopen
90 #ifndef DEFAULT_GDB_EXTENSIONS
91 #define DEFAULT_GDB_EXTENSIONS 1
94 extern int rtx_equal_function_value_matters;
96 #if ! (defined (VMS) || defined (OS2))
97 extern char **environ;
99 extern char *version_string, *language_string;
101 /* Carry information from ASM_DECLARE_OBJECT_NAME
102 to ASM_FINISH_DECLARE_OBJECT. */
104 extern int size_directive_output;
105 extern tree last_assemble_variable_decl;
107 extern void init_lex ();
108 extern void init_decl_processing ();
109 extern void init_obstacks ();
110 extern void init_tree_codes ();
111 extern void init_rtl ();
112 extern void init_regs ();
113 extern void init_optabs ();
114 extern void init_stmt ();
115 extern void init_reg_sets ();
116 extern void dump_flow_info ();
117 extern void dump_sched_info ();
118 extern void dump_local_alloc ();
120 void rest_of_decl_compilation ();
121 void error_with_file_and_line PVPROTO((char *file, int line, char *s, ...));
122 void error_with_decl PVPROTO((tree decl, char *s, ...));
123 void error_for_asm PVPROTO((rtx insn, char *s, ...));
124 void error PVPROTO((char *s, ...));
125 void fatal PVPROTO((char *s, ...));
126 void warning_with_file_and_line PVPROTO((char *file, int line, char *s, ...));
127 void warning_with_decl PVPROTO((tree decl, char *s, ...));
128 void warning_for_asm PVPROTO((rtx insn, char *s, ...));
129 void warning PVPROTO((char *s, ...));
130 void pedwarn PVPROTO((char *s, ...));
131 void pedwarn_with_decl PVPROTO((tree decl, char *s, ...));
132 void pedwarn_with_file_and_line PVPROTO((char *file, int line, char *s, ...));
133 void sorry PVPROTO((char *s, ...));
134 void really_sorry PVPROTO((char *s, ...));
139 void set_target_switch ();
140 static void print_switch_values ();
141 static char *decl_name ();
143 /* Name of program invoked, sans directories. */
147 /* Copy of arguments to main. */
151 /* Name of current original source file (what was input to cpp).
152 This comes from each #-command in the actual input. */
154 char *input_filename;
156 /* Name of top-level original source file (what was input to cpp).
157 This comes from the #-command at the beginning of the actual input.
158 If there isn't any there, then this is the cc1 input file name. */
160 char *main_input_filename;
162 /* Stream for reading from the input file. */
166 /* Current line number in real source file. */
170 /* Stack of currently pending input files. */
172 struct file_stack *input_file_stack;
174 /* Incremented on each change to input_file_stack. */
175 int input_file_stack_tick;
177 /* FUNCTION_DECL for function now being parsed or compiled. */
179 extern tree current_function_decl;
181 /* Name to use as base of names for dump output files. */
183 char *dump_base_name;
185 /* Bit flags that specify the machine subtype we are compiling for.
186 Bits are tested using macros TARGET_... defined in the tm.h file
187 and set by `-m...' switches. Must be defined in rtlanal.c. */
189 extern int target_flags;
191 /* Flags saying which kinds of debugging dump have been requested. */
194 int rtl_dump_and_exit = 0;
195 int jump_opt_dump = 0;
200 int combine_dump = 0;
202 int local_reg_dump = 0;
203 int global_reg_dump = 0;
205 int jump2_opt_dump = 0;
206 int dbr_sched_dump = 0;
207 int flag_print_asm_name = 0;
208 int stack_reg_dump = 0;
210 /* Name for output file of assembly code, specified with -o. */
214 /* Value of the -G xx switch, and whether it was passed or not. */
218 /* Type(s) of debugging information we are producing (if any).
219 See flags.h for the definitions of the different possible
220 types of debugging information. */
221 enum debug_info_type write_symbols = NO_DEBUG;
223 /* Level of debugging information we are producing. See flags.h
224 for the definitions of the different possible levels. */
225 enum debug_info_level debug_info_level = DINFO_LEVEL_NONE;
227 /* Nonzero means use GNU-only extensions in the generated symbolic
228 debugging information. */
229 /* Currently, this only has an effect when write_symbols is set to
230 DBX_DEBUG, XCOFF_DEBUG, or DWARF_DEBUG. */
231 int use_gnu_debug_info_extensions = 0;
233 /* Nonzero means do optimizations. -O.
234 Particular numeric values stand for particular amounts of optimization;
235 thus, -O2 stores 2 here. However, the optimizations beyond the basic
236 ones are not controlled directly by this variable. Instead, they are
237 controlled by individual `flag_...' variables that are defaulted
238 based on this variable. */
242 /* Number of error messages and warning messages so far. */
245 int warningcount = 0;
248 /* Flag to output bytecode instead of native assembler */
249 int output_bytecode = 0;
251 /* Pointer to function to compute the name to use to print a declaration. */
253 char *(*decl_printable_name) ();
255 /* Pointer to function to compute rtl for a language-specific tree code. */
257 struct rtx_def *(*lang_expand_expr) ();
259 /* Pointer to function to finish handling an incomplete decl at the
260 end of compilation. */
262 void (*incomplete_decl_finalize_hook) () = 0;
264 /* Pointer to function for interim exception handling implementation.
265 This interface will change, and it is only here until a better interface
268 void (*interim_eh_hook) PROTO((tree));
270 /* Nonzero if generating code to do profiling. */
272 int profile_flag = 0;
274 /* Nonzero if generating code to do profiling on a line-by-line basis. */
276 int profile_block_flag;
278 /* Nonzero for -pedantic switch: warn about anything
279 that standard spec forbids. */
283 /* Temporarily suppress certain warnings.
284 This is set while reading code from a system header file. */
286 int in_system_header = 0;
288 /* Nonzero means do stupid register allocation.
289 Currently, this is 1 if `optimize' is 0. */
291 int obey_regdecls = 0;
293 /* Don't print functions as they are compiled and don't print
294 times taken by the various passes. -quiet. */
300 /* Nonzero means `char' should be signed. */
302 int flag_signed_char;
304 /* Nonzero means give an enum type only as many bytes as it needs. */
306 int flag_short_enums;
308 /* Nonzero for -fcaller-saves: allocate values in regs that need to
309 be saved across function calls, if that produces overall better code.
310 Optional now, so people can test it. */
312 #ifdef DEFAULT_CALLER_SAVES
313 int flag_caller_saves = 1;
315 int flag_caller_saves = 0;
318 /* Nonzero if structures and unions should be returned in memory.
320 This should only be defined if compatibility with another compiler or
321 with an ABI is needed, because it results in slower code. */
323 #ifndef DEFAULT_PCC_STRUCT_RETURN
324 #define DEFAULT_PCC_STRUCT_RETURN 1
327 /* Nonzero for -fpcc-struct-return: return values the same way PCC does. */
329 int flag_pcc_struct_return = DEFAULT_PCC_STRUCT_RETURN;
331 /* Nonzero for -fforce-mem: load memory value into a register
332 before arithmetic on it. This makes better cse but slower compilation. */
334 int flag_force_mem = 0;
336 /* Nonzero for -fforce-addr: load memory address into a register before
337 reference to memory. This makes better cse but slower compilation. */
339 int flag_force_addr = 0;
341 /* Nonzero for -fdefer-pop: don't pop args after each function call;
342 instead save them up to pop many calls' args with one insns. */
344 int flag_defer_pop = 0;
346 /* Nonzero for -ffloat-store: don't allocate floats and doubles
347 in extended-precision registers. */
349 int flag_float_store = 0;
351 /* Nonzero for -fcse-follow-jumps:
352 have cse follow jumps to do a more extensive job. */
354 int flag_cse_follow_jumps;
356 /* Nonzero for -fcse-skip-blocks:
357 have cse follow a branch around a block. */
358 int flag_cse_skip_blocks;
360 /* Nonzero for -fexpensive-optimizations:
361 perform miscellaneous relatively-expensive optimizations. */
362 int flag_expensive_optimizations;
364 /* Nonzero for -fthread-jumps:
365 have jump optimize output of loop. */
367 int flag_thread_jumps;
369 /* Nonzero enables strength-reduction in loop.c. */
371 int flag_strength_reduce = 0;
373 /* Nonzero enables loop unrolling in unroll.c. Only loops for which the
374 number of iterations can be calculated at compile-time (UNROLL_COMPLETELY,
375 UNROLL_MODULO) or at run-time (preconditioned to be UNROLL_MODULO) are
378 int flag_unroll_loops;
380 /* Nonzero enables loop unrolling in unroll.c. All loops are unrolled.
381 This is generally not a win. */
383 int flag_unroll_all_loops;
385 /* Nonzero for -fwritable-strings:
386 store string constants in data segment and don't uniquize them. */
388 int flag_writable_strings = 0;
390 /* Nonzero means don't put addresses of constant functions in registers.
391 Used for compiling the Unix kernel, where strange substitutions are
392 done on the assembly output. */
394 int flag_no_function_cse = 0;
396 /* Nonzero for -fomit-frame-pointer:
397 don't make a frame pointer in simple functions that don't require one. */
399 int flag_omit_frame_pointer = 0;
401 /* Nonzero to inhibit use of define_optimization peephole opts. */
403 int flag_no_peephole = 0;
405 /* Nonzero allows GCC to violate some IEEE or ANSI rules regarding math
406 operations in the interest of optimization. For example it allows
407 GCC to assume arguments to sqrt are nonnegative numbers, allowing
408 faster code for sqrt to be generated. */
410 int flag_fast_math = 0;
412 /* Nonzero means all references through pointers are volatile. */
416 /* Nonzero means treat all global and extern variables as global. */
418 int flag_volatile_global;
420 /* Nonzero means just do syntax checking; don't output anything. */
422 int flag_syntax_only = 0;
424 /* Nonzero means to rerun cse after loop optimization. This increases
425 compilation time about 20% and picks up a few more common expressions. */
427 static int flag_rerun_cse_after_loop;
429 /* Nonzero for -finline-functions: ok to inline functions that look like
430 good inline candidates. */
432 int flag_inline_functions;
434 /* Nonzero for -fkeep-inline-functions: even if we make a function
435 go inline everywhere, keep its definition around for debugging
438 int flag_keep_inline_functions;
440 /* Nonzero means that functions will not be inlined. */
444 /* Nonzero means we should be saving declaration info into a .X file. */
446 int flag_gen_aux_info = 0;
448 /* Specified name of aux-info file. */
450 static char *aux_info_file_name;
452 /* Nonzero means make the text shared if supported. */
454 int flag_shared_data;
456 /* Nonzero means schedule into delayed branch slots if supported. */
458 int flag_delayed_branch;
460 /* Nonzero means to run cleanups after CALL_EXPRs. */
462 int flag_short_temps;
464 /* Nonzero if we are compiling pure (sharable) code.
465 Value is 1 if we are doing reasonable (i.e. simple
466 offset into offset table) pic. Value is 2 if we can
467 only perform register offsets. */
471 /* Nonzero means place uninitialized global data in the bss section. */
475 /* Nonzero means pretend it is OK to examine bits of target floats,
476 even if that isn't true. The resulting code will have incorrect constants,
477 but the same series of instructions that the native compiler would make. */
479 int flag_pretend_float;
481 /* Nonzero means change certain warnings into errors.
482 Usually these are warnings about failure to conform to some standard. */
484 int flag_pedantic_errors = 0;
486 /* flag_schedule_insns means schedule insns within basic blocks (before
488 flag_schedule_insns_after_reload means schedule insns after
491 int flag_schedule_insns = 0;
492 int flag_schedule_insns_after_reload = 0;
494 /* -finhibit-size-directive inhibits output of .size for ELF.
495 This is used only for compiling crtstuff.c,
496 and it may be extended to other effects
497 needed for crtstuff.c on other systems. */
498 int flag_inhibit_size_directive = 0;
500 /* -fverbose-asm causes extra commentary information to be produced in
501 the generated assembly code (to make it more readable). This option
502 is generally only of use to those who actually need to read the
503 generated assembly code (perhaps while debugging the compiler itself). */
505 int flag_verbose_asm = 0;
507 /* -fgnu-linker specifies use of the GNU linker for initializations.
508 (Or, more generally, a linker that handles initializations.)
509 -fno-gnu-linker says that collect2 will be used. */
511 int flag_gnu_linker = 0;
513 int flag_gnu_linker = 1;
516 /* Tag all structures with __attribute__(packed) */
517 int flag_pack_struct = 0;
519 /* Table of language-independent -f options.
520 STRING is the option name. VARIABLE is the address of the variable.
521 ON_VALUE is the value to store in VARIABLE
522 if `-fSTRING' is seen as an option.
523 (If `-fno-STRING' is seen as an option, the opposite value is stored.) */
525 struct { char *string; int *variable; int on_value;} f_options[] =
527 {"float-store", &flag_float_store, 1},
528 {"volatile", &flag_volatile, 1},
529 {"volatile-global", &flag_volatile_global, 1},
530 {"defer-pop", &flag_defer_pop, 1},
531 {"omit-frame-pointer", &flag_omit_frame_pointer, 1},
532 {"cse-follow-jumps", &flag_cse_follow_jumps, 1},
533 {"cse-skip-blocks", &flag_cse_skip_blocks, 1},
534 {"expensive-optimizations", &flag_expensive_optimizations, 1},
535 {"thread-jumps", &flag_thread_jumps, 1},
536 {"strength-reduce", &flag_strength_reduce, 1},
537 {"unroll-loops", &flag_unroll_loops, 1},
538 {"unroll-all-loops", &flag_unroll_all_loops, 1},
539 {"writable-strings", &flag_writable_strings, 1},
540 {"peephole", &flag_no_peephole, 0},
541 {"force-mem", &flag_force_mem, 1},
542 {"force-addr", &flag_force_addr, 1},
543 {"function-cse", &flag_no_function_cse, 0},
544 {"inline-functions", &flag_inline_functions, 1},
545 {"keep-inline-functions", &flag_keep_inline_functions, 1},
546 {"inline", &flag_no_inline, 0},
547 {"syntax-only", &flag_syntax_only, 1},
548 {"shared-data", &flag_shared_data, 1},
549 {"caller-saves", &flag_caller_saves, 1},
550 {"pcc-struct-return", &flag_pcc_struct_return, 1},
551 {"reg-struct-return", &flag_pcc_struct_return, 0},
552 {"delayed-branch", &flag_delayed_branch, 1},
553 {"rerun-cse-after-loop", &flag_rerun_cse_after_loop, 1},
554 {"pretend-float", &flag_pretend_float, 1},
555 {"schedule-insns", &flag_schedule_insns, 1},
556 {"schedule-insns2", &flag_schedule_insns_after_reload, 1},
557 {"pic", &flag_pic, 1},
558 {"PIC", &flag_pic, 2},
559 {"fast-math", &flag_fast_math, 1},
560 {"common", &flag_no_common, 0},
561 {"inhibit-size-directive", &flag_inhibit_size_directive, 1},
562 {"verbose-asm", &flag_verbose_asm, 1},
563 {"gnu-linker", &flag_gnu_linker, 1},
564 {"pack-struct", &flag_pack_struct, 1},
565 {"bytecode", &output_bytecode, 1}
568 /* Table of language-specific options. */
570 char *lang_options[] =
573 "-fallow-single-precision",
575 "-fsigned-bitfields",
576 "-funsigned-bitfields",
577 "-fno-signed-bitfields",
578 "-fno-unsigned-bitfields",
582 "-fno-unsigned-char",
594 "-fno-cond-mismatch",
595 "-fdollars-in-identifiers",
596 "-fno-dollars-in-identifiers",
605 "-Wbad-function-cast",
606 "-Wno-bad-function-cast",
610 "-Wno-char-subscripts",
624 "-Wno-missing-braces",
625 "-Wmissing-declarations",
626 "-Wno-missing-declarations",
627 "-Wmissing-prototypes",
628 "-Wno-missing-prototypes",
630 "-Wno-nested-externs",
634 "-Wno-pointer-arith",
636 "-Wno-redundant-decls",
637 "-Wstrict-prototypes",
638 "-Wno-strict-prototypes",
644 "-Wno-write-strings",
646 /* These are for C++. */
647 "-+e0", /* gcc.c tacks the `-' on the front. */
651 "-fno-access-control",
654 "-falt-external-templates",
655 "-fno-alt-external-templates",
656 "-fansi-overloading",
657 "-fno-ansi-overloading",
663 "-fno-conserve-space",
665 "-fno-default-inline",
668 "-felide-constructors",
669 "-fno-elide-constructors",
671 "-fno-enum-int-equiv",
672 "-fexternal-templates",
673 "-fno-external-templates",
678 "-fhandle-exceptions",
679 "-fno-handle-exceptions",
680 "-fhandle-signatures",
681 "-fno-handle-signatures",
684 "-fimplement-inlines",
685 "-fno-implement-inlines",
686 "-fimplicit-templates",
687 "-fno-implicit-templates",
691 "-fno-memoize-lookups",
693 "-fno-nonnull-objects",
695 "-fno-operator-names",
699 "-fno-save-memoized",
704 "-fstrict-prototype",
705 "-fno-strict-prototype",
706 "-fthis-is-variable",
707 "-fno-this-is-variable",
709 "-fno-vtable-thunks",
715 "-Woverloaded-virtual",
716 "-Wno-overloaded-virtual",
717 "-Wtemplate-debugging",
718 "-Wno-template-debugging",
719 "-Wctor-dtor-privacy",
720 "-Wno-ctor-dtor-privacy",
721 "-Wnon-virtual-dtor",
722 "-Wno-non-virtual-dtor",
724 "-Wno-extern-inline",
730 /* these are for obj c */
742 /* THESE ARE FOR FORTRAN. */
766 "-fintrin-case-initcap",
767 "-fintrin-case-upper",
768 "-fintrin-case-lower",
770 "-fmatch-case-initcap",
771 "-fmatch-case-upper",
772 "-fmatch-case-lower",
774 "-fsource-case-upper",
775 "-fsource-case-upper",
776 "-fsource-case-lower",
777 "-fsource-case-preserve",
778 "-fsymbol-case-initcap",
779 "-fsymbol-case-upper",
780 "-fsymbol-case-lower",
782 "-fcase-strict-upper",
783 "-fcase-strict-lower",
788 "-fdcp-intrinsics-delete",
789 "-fdcp-intrinsics-hide",
790 "-fdcp-intrinsics-disable",
791 "-fdcp-intrinsics-enable",
792 "-ff2c-intrinsics-delete",
793 "-ff2c-intrinsics-hide",
794 "-ff2c-intrinsics-disable",
795 "-ff2c-intrinsics-enable",
796 "-ff90-intrinsics-delete",
797 "-ff90-intrinsics-hide",
798 "-ff90-intrinsics-disable",
799 "-ff90-intrinsics-enable",
800 "-fmil-intrinsics-delete",
801 "-fmil-intrinsics-hide",
802 "-fmil-intrinsics-disable",
803 "-fmil-intrinsics-enable",
804 "-fvxt-intrinsics-delete",
805 "-fvxt-intrinsics-hide",
806 "-fvxt-intrinsics-disable",
807 "-fvxt-intrinsics-enable",
809 /* This is for GNAT and is temporary. */
814 /* Options controlling warnings */
816 /* Don't print warning messages. -w. */
818 int inhibit_warnings = 0;
820 /* Print various extra warnings. -W. */
822 int extra_warnings = 0;
824 /* Treat warnings as errors. -Werror. */
826 int warnings_are_errors = 0;
828 /* Nonzero to warn about unused local variables. */
832 /* Nonzero to warn about variables used before they are initialized. */
834 int warn_uninitialized;
836 /* Nonzero means warn about all declarations which shadow others. */
840 /* Warn if a switch on an enum fails to have a case for every enum value. */
844 /* Nonzero means warn about function definitions that default the return type
845 or that use a null return and have a return-type other than void. */
847 int warn_return_type;
849 /* Nonzero means warn about pointer casts that increase the required
850 alignment of the target type (and might therefore lead to a crash
851 due to a misaligned access). */
855 /* Nonzero means warn about any identifiers that match in the first N
856 characters. The value N is in `id_clash_len'. */
859 unsigned id_clash_len;
861 /* Nonzero means warn about any objects definitions whose size is larger
862 than N bytes. Also want about function definitions whose returned
863 values are larger than N bytes. The value N is in `larger_than_size'. */
865 int warn_larger_than;
866 unsigned larger_than_size;
868 /* Nonzero means warn if inline function is too large. */
872 /* Warn if a function returns an aggregate,
873 since there are often incompatible calling conventions for doing this. */
875 int warn_aggregate_return;
877 /* Likewise for -W. */
879 struct { char *string; int *variable; int on_value;} W_options[] =
881 {"unused", &warn_unused, 1},
882 {"error", &warnings_are_errors, 1},
883 {"shadow", &warn_shadow, 1},
884 {"switch", &warn_switch, 1},
885 {"aggregate-return", &warn_aggregate_return, 1},
886 {"cast-align", &warn_cast_align, 1},
887 {"uninitialized", &warn_uninitialized, 1},
888 {"inline", &warn_inline, 1}
891 /* Output files for assembler code (real compiler output)
892 and debugging dumps. */
897 FILE *jump_opt_dump_file;
899 FILE *loop_dump_file;
900 FILE *cse2_dump_file;
901 FILE *flow_dump_file;
902 FILE *combine_dump_file;
903 FILE *sched_dump_file;
904 FILE *local_reg_dump_file;
905 FILE *global_reg_dump_file;
906 FILE *sched2_dump_file;
907 FILE *jump2_opt_dump_file;
908 FILE *dbr_sched_dump_file;
909 FILE *stack_reg_dump_file;
911 /* Time accumulators, to count the total time spent in various passes. */
915 int integration_time;
923 int local_alloc_time;
924 int global_alloc_time;
927 int shorten_branch_time;
933 /* Return time used so far, in microseconds. */
943 struct rusage rusage;
948 int proc_system_time;
950 int child_system_time;
962 return (clock() * 1000);
963 #else /* not WINNT */
966 return (tms.tms_utime + tms.tms_stime) * (1000000 / HZ);
969 getrusage (0, &rusage);
970 return (rusage.ru_utime.tv_sec * 1000000 + rusage.ru_utime.tv_usec
971 + rusage.ru_stime.tv_sec * 1000000 + rusage.ru_stime.tv_usec);
974 return (vms_times.proc_user_time + vms_times.proc_system_time) * 10000;
980 #define TIMEVAR(VAR, BODY) \
981 do { int otime = get_run_time (); BODY; VAR += get_run_time () - otime; } while (0)
984 print_time (str, total)
989 "time in %s: %d.%06d\n",
990 str, total / 1000000, total % 1000000);
993 /* Count an error or warning. Return 1 if the message should be printed. */
996 count_error (warningp)
999 if (warningp && inhibit_warnings)
1002 if (warningp && !warnings_are_errors)
1006 static int warning_message = 0;
1008 if (warningp && !warning_message)
1010 fprintf (stderr, "%s: warnings being treated as errors\n", progname);
1011 warning_message = 1;
1019 /* Print a fatal error message. NAME is the text.
1020 Also include a system error message based on `errno'. */
1023 pfatal_with_name (name)
1026 fprintf (stderr, "%s: ", progname);
1032 fatal_io_error (name)
1035 fprintf (stderr, "%s: %s: I/O error\n", progname, name);
1039 /* Called to give a better error message for a bad insn rather than
1040 just calling abort(). */
1043 fatal_insn (message, insn)
1047 if (!output_bytecode)
1053 fflush (asm_out_file);
1055 fflush (aux_info_file);
1057 fflush (rtl_dump_file);
1058 if (jump_opt_dump_file)
1059 fflush (jump_opt_dump_file);
1061 fflush (cse_dump_file);
1063 fflush (loop_dump_file);
1065 fflush (cse2_dump_file);
1067 fflush (flow_dump_file);
1068 if (combine_dump_file)
1069 fflush (combine_dump_file);
1070 if (sched_dump_file)
1071 fflush (sched_dump_file);
1072 if (local_reg_dump_file)
1073 fflush (local_reg_dump_file);
1074 if (global_reg_dump_file)
1075 fflush (global_reg_dump_file);
1076 if (sched2_dump_file)
1077 fflush (sched2_dump_file);
1078 if (jump2_opt_dump_file)
1079 fflush (jump2_opt_dump_file);
1080 if (dbr_sched_dump_file)
1081 fflush (dbr_sched_dump_file);
1082 if (stack_reg_dump_file)
1083 fflush (stack_reg_dump_file);
1087 /* Called to give a better error message when we don't have an insn to match
1088 what we are looking for or if the insn's constraints aren't satisfied,
1089 rather than just calling abort(). */
1092 fatal_insn_not_found (insn)
1095 if (INSN_CODE (insn) < 0)
1096 fatal_insn ("internal error--unrecognizable insn:", insn);
1098 fatal_insn ("internal error--insn does not satisfy its constraints:", insn);
1101 /* This is the default decl_printable_name function. */
1104 decl_name (decl, kind)
1108 return IDENTIFIER_POINTER (DECL_NAME (decl));
1111 /* This is the default interim_eh_hook function. */
1114 interim_eh (finalization)
1117 /* Don't do anything by default. */
1120 static int need_error_newline;
1122 /* Function of last error message;
1123 more generally, function such that if next error message is in it
1124 then we don't have to mention the function name. */
1125 static tree last_error_function = NULL;
1127 /* Used to detect when input_file_stack has changed since last described. */
1128 static int last_error_tick;
1130 /* Called when the start of a function definition is parsed,
1131 this function prints on stderr the name of the function. */
1134 announce_function (decl)
1140 if (rtl_dump_and_exit)
1141 fprintf (stderr, "%s ", IDENTIFIER_POINTER (DECL_NAME (decl)));
1143 fprintf (stderr, " %s", (*decl_printable_name) (decl, &junk));
1145 need_error_newline = 1;
1146 last_error_function = current_function_decl;
1150 /* The default function to print out name of current function that caused
1154 default_print_error_function (file)
1157 if (last_error_function != current_function_decl)
1159 char *kind = "function";
1160 if (current_function_decl != 0
1161 && TREE_CODE (TREE_TYPE (current_function_decl)) == METHOD_TYPE)
1165 fprintf (stderr, "%s: ", file);
1167 if (current_function_decl == NULL)
1168 fprintf (stderr, "At top level:\n");
1171 char *name = (*decl_printable_name) (current_function_decl, &kind);
1172 fprintf (stderr, "In %s `%s':\n", kind, name);
1175 last_error_function = current_function_decl;
1179 /* Called by report_error_function to print out function name.
1180 * Default may be overridden by language front-ends. */
1182 void (*print_error_function) PROTO((char*)) = default_print_error_function;
1184 /* Prints out, if necessary, the name of the current function
1185 that caused an error. Called from all error and warning functions. */
1188 report_error_function (file)
1191 struct file_stack *p;
1193 if (need_error_newline)
1195 fprintf (stderr, "\n");
1196 need_error_newline = 0;
1199 (*print_error_function) (file);
1201 if (input_file_stack && input_file_stack->next != 0
1202 && input_file_stack_tick != last_error_tick)
1204 fprintf (stderr, "In file included");
1205 for (p = input_file_stack->next; p; p = p->next)
1207 fprintf (stderr, " from %s:%d", p->name, p->line);
1209 fprintf (stderr, ",\n ");
1211 fprintf (stderr, ":\n");
1212 last_error_tick = input_file_stack_tick;
1216 /* Print a message. */
1219 vmessage (prefix, s, ap)
1225 fprintf (stderr, "%s: ", prefix);
1228 vfprintf (stderr, s, ap);
1231 HOST_WIDE_INT v1 = va_arg(ap, HOST_WIDE_INT);
1232 HOST_WIDE_INT v2 = va_arg(ap, HOST_WIDE_INT);
1233 HOST_WIDE_INT v3 = va_arg(ap, HOST_WIDE_INT);
1234 fprintf (stderr, s, v1, v2, v3);
1239 /* Print a message relevant to line LINE of file FILE. */
1242 v_message_with_file_and_line (file, line, prefix, s, ap)
1250 fprintf (stderr, "%s:%d: ", file, line);
1252 fprintf (stderr, "%s: ", progname);
1254 vmessage (prefix, s, ap);
1255 fputc ('\n', stderr);
1258 /* Print a message relevant to the given DECL. */
1261 v_message_with_decl (decl, prefix, s, ap)
1269 fprintf (stderr, "%s:%d: ",
1270 DECL_SOURCE_FILE (decl), DECL_SOURCE_LINE (decl));
1273 fprintf (stderr, "%s: ", prefix);
1275 /* Do magic to get around lack of varargs support for insertion
1276 of arguments into existing list. We know that the decl is first;
1277 we ass_u_me that it will be printed with "%s". */
1279 for (p = s; *p; ++p)
1283 if (*(p + 1) == '%')
1290 if (p > s) /* Print the left-hand substring. */
1292 char fmt[sizeof "%.255s"];
1295 if (width > 255L) width = 255L; /* arbitrary */
1296 sprintf (fmt, "%%.%lds", width);
1297 fprintf (stderr, fmt, s);
1300 if (*p == '%') /* Print the name. */
1302 char *n = (DECL_NAME (decl)
1303 ? (*decl_printable_name) (decl, &junk)
1309 if (isalpha (*(p - 1) & 0xFF))
1314 if (*p) /* Print the rest of the message. */
1315 vmessage ((char *)NULL, p, ap);
1317 fputc ('\n', stderr);
1320 /* Figure file and line of the given INSN. */
1323 file_and_line_for_asm (insn, pfile, pline)
1328 rtx body = PATTERN (insn);
1331 /* Find the (or one of the) ASM_OPERANDS in the insn. */
1332 if (GET_CODE (body) == SET && GET_CODE (SET_SRC (body)) == ASM_OPERANDS)
1333 asmop = SET_SRC (body);
1334 else if (GET_CODE (body) == ASM_OPERANDS)
1336 else if (GET_CODE (body) == PARALLEL
1337 && GET_CODE (XVECEXP (body, 0, 0)) == SET)
1338 asmop = SET_SRC (XVECEXP (body, 0, 0));
1339 else if (GET_CODE (body) == PARALLEL
1340 && GET_CODE (XVECEXP (body, 0, 0)) == ASM_OPERANDS)
1341 asmop = XVECEXP (body, 0, 0);
1347 *pfile = ASM_OPERANDS_SOURCE_FILE (asmop);
1348 *pline = ASM_OPERANDS_SOURCE_LINE (asmop);
1352 *pfile = input_filename;
1357 /* Report an error at line LINE of file FILE. */
1360 v_error_with_file_and_line (file, line, s, ap)
1367 report_error_function (file);
1368 v_message_with_file_and_line (file, line, (char *)NULL, s, ap);
1372 error_with_file_and_line VPROTO((char *file, int line, char *s, ...))
1384 file = va_arg (ap, char *);
1385 line = va_arg (ap, int);
1386 s = va_arg (ap, char *);
1389 v_error_with_file_and_line (file, line, s, ap);
1393 /* Report an error at the declaration DECL.
1394 S is a format string which uses %s to substitute the declaration
1395 name; subsequent substitutions are a la printf. */
1398 v_error_with_decl (decl, s, ap)
1404 report_error_function (DECL_SOURCE_FILE (decl));
1405 v_message_with_decl (decl, (char *)NULL, s, ap);
1409 error_with_decl VPROTO((tree decl, char *s, ...))
1420 decl = va_arg (ap, tree);
1421 s = va_arg (ap, char *);
1424 v_error_with_decl (decl, s, ap);
1428 /* Report an error at the line number of the insn INSN.
1429 This is used only when INSN is an `asm' with operands,
1430 and each ASM_OPERANDS records its own source file and line. */
1433 v_error_for_asm (insn, s, ap)
1442 file_and_line_for_asm (insn, &file, &line);
1443 report_error_function (file);
1444 v_message_with_file_and_line (file, line, (char *)NULL, s, ap);
1448 error_for_asm VPROTO((rtx insn, char *s, ...))
1459 insn = va_arg (ap, rtx);
1460 s = va_arg (ap, char *);
1463 v_error_for_asm (insn, s, ap);
1467 /* Report an error at the current line number. */
1474 v_error_with_file_and_line (input_filename, lineno, s, ap);
1478 error VPROTO((char *s, ...))
1488 s = va_arg (ap, char *);
1495 /* Report a fatal error at the current line number. */
1507 fatal VPROTO((char *s, ...))
1517 s = va_arg (ap, char *);
1524 /* Report a warning at line LINE of file FILE. */
1527 v_warning_with_file_and_line (file, line, s, ap)
1533 if (count_error (1))
1535 report_error_function (file);
1536 v_message_with_file_and_line (file, line, "warning", s, ap);
1541 warning_with_file_and_line VPROTO((char *file, int line, char *s, ...))
1553 file = va_arg (ap, char *);
1554 line = va_arg (ap, int);
1555 s = va_arg (ap, char *);
1558 v_warning_with_file_and_line (file, line, s, ap);
1562 /* Report a warning at the declaration DECL.
1563 S is a format string which uses %s to substitute the declaration
1564 name; subsequent substitutions are a la printf. */
1567 v_warning_with_decl (decl, s, ap)
1572 if (count_error (1))
1574 report_error_function (DECL_SOURCE_FILE (decl));
1575 v_message_with_decl (decl, "warning", s, ap);
1580 warning_with_decl VPROTO((tree decl, char *s, ...))
1591 decl = va_arg (ap, tree);
1592 s = va_arg (ap, char *);
1595 v_warning_with_decl (decl, s, ap);
1599 /* Report a warning at the line number of the insn INSN.
1600 This is used only when INSN is an `asm' with operands,
1601 and each ASM_OPERANDS records its own source file and line. */
1604 v_warning_for_asm (insn, s, ap)
1609 if (count_error (1))
1614 file_and_line_for_asm (insn, &file, &line);
1615 report_error_function (file);
1616 v_message_with_file_and_line (file, line, "warning", s, ap);
1621 warning_for_asm VPROTO((rtx insn, char *s, ...))
1632 insn = va_arg (ap, rtx);
1633 s = va_arg (ap, char *);
1636 v_warning_for_asm (insn, s, ap);
1640 /* Report a warning at the current line number. */
1647 v_warning_with_file_and_line (input_filename, lineno, s, ap);
1651 warning VPROTO((char *s, ...))
1661 s = va_arg (ap, char *);
1668 /* These functions issue either warnings or errors depending on
1669 -pedantic-errors. */
1676 if (flag_pedantic_errors)
1683 pedwarn VPROTO((char *s, ...))
1693 s = va_arg (ap, char *);
1701 v_pedwarn_with_decl (decl, s, ap)
1706 /* We don't want -pedantic-errors to cause the compilation to fail from
1707 "errors" in system header files. Sometimes fixincludes can't fix what's
1708 broken (eg: unsigned char bitfields - fixing it may change the alignment
1709 which will cause programs to mysteriously fail because the C library
1710 or kernel uses the original layout). There's no point in issuing a
1711 warning either, it's just unnecessary noise. */
1713 if (! DECL_IN_SYSTEM_HEADER (decl))
1715 if (flag_pedantic_errors)
1716 v_error_with_decl (decl, s, ap);
1718 v_warning_with_decl (decl, s, ap);
1723 pedwarn_with_decl VPROTO((tree decl, char *s, ...))
1734 decl = va_arg (ap, tree);
1735 s = va_arg (ap, char *);
1738 v_pedwarn_with_decl (decl, s, ap);
1743 v_pedwarn_with_file_and_line (file, line, s, ap)
1749 if (flag_pedantic_errors)
1750 v_error_with_file_and_line (file, line, s, ap);
1752 v_warning_with_file_and_line (file, line, s, ap);
1756 pedwarn_with_file_and_line VPROTO((char *file, int line, char *s, ...))
1768 file = va_arg (ap, char *);
1769 line = va_arg (ap, int);
1770 s = va_arg (ap, char *);
1773 v_pedwarn_with_file_and_line (file, line, s, ap);
1777 /* Apologize for not implementing some feature. */
1786 fprintf (stderr, "%s:%d: ", input_filename, lineno);
1788 fprintf (stderr, "%s: ", progname);
1789 vmessage ("sorry, not implemented", s, ap);
1790 fputc ('\n', stderr);
1794 sorry VPROTO((char *s, ...))
1804 s = va_arg (ap, char *);
1811 /* Apologize for not implementing some feature, then quit. */
1814 v_really_sorry (s, ap)
1820 fprintf (stderr, "%s:%d: ", input_filename, lineno);
1822 fprintf (stderr, "%s: ", progname);
1823 vmessage ("sorry, not implemented", s, ap);
1824 fatal (" (fatal)\n");
1828 really_sorry VPROTO((char *s, ...))
1838 s = va_arg (ap, char *);
1841 v_really_sorry (s, ap);
1845 /* More 'friendly' abort that prints the line and file.
1846 config.h can #define abort fancy_abort if you like that sort of thing.
1848 I don't think this is actually a good idea.
1849 Other sorts of crashes will look a certain way.
1850 It is a good thing if crashes from calling abort look the same way.
1856 fatal ("internal gcc abort");
1859 /* This calls abort and is used to avoid problems when abort if a macro.
1860 It is used when we need to pass the address of abort. */
1868 /* When `malloc.c' is compiled with `rcheck' defined,
1869 it calls this function to report clobberage. */
1877 /* Same as `malloc' but report error if no memory available. */
1883 register char *value = (char *) malloc (size);
1885 fatal ("virtual memory exhausted");
1889 /* Same as `realloc' but report error if no memory available. */
1892 xrealloc (ptr, size)
1896 char *result = (char *) realloc (ptr, size);
1898 fatal ("virtual memory exhausted");
1902 /* Return the logarithm of X, base 2, considering X unsigned,
1903 if X is a power of 2. Otherwise, returns -1.
1905 This should be used via the `exact_log2' macro. */
1909 register unsigned HOST_WIDE_INT x;
1911 register int log = 0;
1912 /* Test for 0 or a power of 2. */
1913 if (x == 0 || x != (x & -x))
1915 while ((x >>= 1) != 0)
1920 /* Given X, an unsigned number, return the largest int Y such that 2**Y <= X.
1921 If X is 0, return -1.
1923 This should be used via the floor_log2 macro. */
1927 register unsigned HOST_WIDE_INT x;
1929 register int log = -1;
1937 jmp_buf float_handler;
1939 /* Specify where to longjmp to when a floating arithmetic error happens.
1940 If HANDLER is 0, it means don't handle the errors any more. */
1943 set_float_handler (handler)
1946 float_handled = (handler != 0);
1948 bcopy ((char *) handler, (char *) float_handler, sizeof (float_handler));
1951 /* Specify, in HANDLER, where to longjmp to when a floating arithmetic
1952 error happens, pushing the previous specification into OLD_HANDLER.
1953 Return an indication of whether there was a previous handler in effect. */
1956 push_float_handler (handler, old_handler)
1957 jmp_buf handler, old_handler;
1959 int was_handled = float_handled;
1963 bcopy ((char *) float_handler, (char *) old_handler,
1964 sizeof (float_handler));
1966 bcopy ((char *) handler, (char *) float_handler, sizeof (float_handler));
1970 /* Restore the previous specification of whether and where to longjmp to
1971 when a floating arithmetic error happens. */
1974 pop_float_handler (handled, handler)
1978 float_handled = handled;
1980 bcopy ((char *) handler, (char *) float_handler, sizeof (float_handler));
1983 /* Signals actually come here. */
1986 float_signal (signo)
1987 /* If this is missing, some compilers complain. */
1990 if (float_handled == 0)
1992 #if defined (USG) || defined (hpux)
1993 signal (SIGFPE, float_signal); /* re-enable the signal catcher */
1996 signal (SIGFPE, float_signal);
1997 longjmp (float_handler, 1);
2000 /* Handler for SIGPIPE. */
2004 /* If this is missing, some compilers complain. */
2007 fatal ("output pipe has been closed");
2010 /* Strip off a legitimate source ending from the input string NAME of
2014 strip_off_ending (name, len)
2018 if (len > 2 && ! strcmp (".c", name + len - 2))
2020 else if (len > 2 && ! strcmp (".m", name + len - 2))
2022 else if (len > 2 && ! strcmp (".i", name + len - 2))
2024 else if (len > 3 && ! strcmp (".ii", name + len - 3))
2026 else if (len > 3 && ! strcmp (".co", name + len - 3))
2028 else if (len > 3 && ! strcmp (".cc", name + len - 3))
2030 else if (len > 2 && ! strcmp (".C", name + len - 2))
2032 else if (len > 4 && ! strcmp (".cxx", name + len - 4))
2034 else if (len > 4 && ! strcmp (".cpp", name + len - 4))
2036 else if (len > 2 && ! strcmp (".f", name + len - 2))
2038 /* Ada will use extensions like .ada, .adb, and .ads, so just test
2040 else if (len > 4 && ! strncmp (".ad", name + len - 4, 3))
2042 else if (len > 4 && ! strcmp (".atr", name + len - 4))
2046 /* Output a quoted string. */
2048 output_quoted_string (asm_file, string)
2054 putc ('\"', asm_file);
2055 while ((c = *string++) != 0)
2057 if (c == '\"' || c == '\\')
2058 putc ('\\', asm_file);
2061 putc ('\"', asm_file);
2064 /* Output a file name in the form wanted by System V. */
2067 output_file_directive (asm_file, input_name)
2071 int len = strlen (input_name);
2072 char *na = input_name + len;
2074 /* NA gets INPUT_NAME sans directory names. */
2075 while (na > input_name)
2082 #ifdef ASM_OUTPUT_MAIN_SOURCE_FILENAME
2083 ASM_OUTPUT_MAIN_SOURCE_FILENAME (asm_file, na);
2085 #ifdef ASM_OUTPUT_SOURCE_FILENAME
2086 ASM_OUTPUT_SOURCE_FILENAME (asm_file, na);
2088 fprintf (asm_file, "\t.file\t");
2089 output_quoted_string (asm_file, na);
2090 fputc ('\n', asm_file);
2095 /* Routine to build language identifier for object file. */
2097 output_lang_identify (asm_out_file)
2100 int len = strlen (lang_identify ()) + sizeof ("__gnu_compiled_") + 1;
2101 char *s = (char *) alloca (len);
2102 sprintf (s, "__gnu_compiled_%s", lang_identify ());
2103 ASM_OUTPUT_LABEL (asm_out_file, s);
2106 /* Routine to open a dump file. */
2108 open_dump_file (base_name, suffix)
2113 char *dumpname = (char *) alloca (strlen (base_name) + strlen (suffix) + 1);
2115 strcpy (dumpname, base_name);
2116 strcat (dumpname, suffix);
2117 f = fopen (dumpname, "w");
2119 pfatal_with_name (dumpname);
2123 /* Compile an entire file of output from cpp, named NAME.
2124 Write a file of assembly output and various debugging dumps. */
2133 int name_specified = name != 0;
2135 if (dump_base_name == 0)
2136 dump_base_name = name ? name : "gccdump";
2140 integration_time = 0;
2148 local_alloc_time = 0;
2149 global_alloc_time = 0;
2152 shorten_branch_time = 0;
2158 /* Open input file. */
2160 if (name == 0 || !strcmp (name, "-"))
2166 finput = fopen (name, "r");
2168 pfatal_with_name (name);
2170 #ifdef IO_BUFFER_SIZE
2171 setvbuf (finput, (char *) xmalloc (IO_BUFFER_SIZE), _IOFBF, IO_BUFFER_SIZE);
2174 /* Initialize data in various passes. */
2179 /* Some of these really don't need to be called when generating bytecode,
2180 but the options would have to be parsed first to know that. -bson */
2182 init_emit_once (debug_info_level == DINFO_LEVEL_NORMAL
2183 || debug_info_level == DINFO_LEVEL_VERBOSE);
2185 init_decl_processing ();
2193 if (flag_caller_saves)
2194 init_caller_save ();
2196 /* If auxiliary info generation is desired, open the output file.
2197 This goes in the same directory as the source file--unlike
2198 all the other output files. */
2199 if (flag_gen_aux_info)
2201 aux_info_file = fopen (aux_info_file_name, "w");
2202 if (aux_info_file == 0)
2203 pfatal_with_name (aux_info_file_name);
2206 /* If rtl dump desired, open the output file. */
2208 rtl_dump_file = open_dump_file (dump_base_name, ".rtl");
2210 /* If jump_opt dump desired, open the output file. */
2212 jump_opt_dump_file = open_dump_file (dump_base_name, ".jump");
2214 /* If cse dump desired, open the output file. */
2216 cse_dump_file = open_dump_file (dump_base_name, ".cse");
2218 /* If loop dump desired, open the output file. */
2220 loop_dump_file = open_dump_file (dump_base_name, ".loop");
2222 /* If cse2 dump desired, open the output file. */
2224 cse2_dump_file = open_dump_file (dump_base_name, ".cse2");
2226 /* If flow dump desired, open the output file. */
2228 flow_dump_file = open_dump_file (dump_base_name, ".flow");
2230 /* If combine dump desired, open the output file. */
2232 combine_dump_file = open_dump_file (dump_base_name, ".combine");
2234 /* If scheduling dump desired, open the output file. */
2236 sched_dump_file = open_dump_file (dump_base_name, ".sched");
2238 /* If local_reg dump desired, open the output file. */
2240 local_reg_dump_file = open_dump_file (dump_base_name, ".lreg");
2242 /* If global_reg dump desired, open the output file. */
2243 if (global_reg_dump)
2244 global_reg_dump_file = open_dump_file (dump_base_name, ".greg");
2246 /* If 2nd scheduling dump desired, open the output file. */
2248 sched2_dump_file = open_dump_file (dump_base_name, ".sched2");
2250 /* If jump2_opt dump desired, open the output file. */
2252 jump2_opt_dump_file = open_dump_file (dump_base_name, ".jump2");
2254 /* If dbr_sched dump desired, open the output file. */
2256 dbr_sched_dump_file = open_dump_file (dump_base_name, ".dbr");
2260 /* If stack_reg dump desired, open the output file. */
2262 stack_reg_dump_file = open_dump_file (dump_base_name, ".stack");
2266 /* Open assembler code output file. */
2268 if (! name_specified && asm_file_name == 0)
2269 asm_out_file = stdout;
2272 int len = strlen (dump_base_name);
2273 register char *dumpname = (char *) xmalloc (len + 6);
2274 strcpy (dumpname, dump_base_name);
2275 strip_off_ending (dumpname, len);
2276 strcat (dumpname, ".s");
2277 if (asm_file_name == 0)
2279 asm_file_name = (char *) xmalloc (strlen (dumpname) + 1);
2280 strcpy (asm_file_name, dumpname);
2282 if (!strcmp (asm_file_name, "-"))
2283 asm_out_file = stdout;
2285 asm_out_file = fopen (asm_file_name, "w");
2286 if (asm_out_file == 0)
2287 pfatal_with_name (asm_file_name);
2290 #ifdef IO_BUFFER_SIZE
2291 setvbuf (asm_out_file, (char *) xmalloc (IO_BUFFER_SIZE),
2292 _IOFBF, IO_BUFFER_SIZE);
2295 input_filename = name;
2297 /* Put an entry on the input file stack for the main input file. */
2299 = (struct file_stack *) xmalloc (sizeof (struct file_stack));
2300 input_file_stack->next = 0;
2301 input_file_stack->name = input_filename;
2303 /* Perform language-specific initialization.
2304 This may set main_input_filename. */
2307 /* If the input doesn't start with a #line, use the input name
2308 as the official input file name. */
2309 if (main_input_filename == 0)
2310 main_input_filename = name;
2312 if (!output_bytecode)
2314 ASM_FILE_START (asm_out_file);
2317 /* Output something to inform GDB that this compilation was by GCC. Also
2318 serves to tell GDB file consists of bytecodes. */
2319 if (output_bytecode)
2320 fprintf (asm_out_file, "bc_gcc2_compiled.:\n");
2323 #ifndef ASM_IDENTIFY_GCC
2324 fprintf (asm_out_file, "gcc2_compiled.:\n");
2326 ASM_IDENTIFY_GCC (asm_out_file);
2330 /* Output something to identify which front-end produced this file. */
2331 #ifdef ASM_IDENTIFY_LANGUAGE
2332 ASM_IDENTIFY_LANGUAGE (asm_out_file);
2335 if (output_bytecode)
2337 if (profile_flag || profile_block_flag)
2338 error ("profiling not supported in bytecode compilation");
2342 /* ??? Note: There used to be a conditional here
2343 to call assemble_zeros without fail if DBX_DEBUGGING_INFO is defined.
2344 This was to guarantee separation between gcc_compiled. and
2345 the first function, for the sake of dbx on Suns.
2346 However, having the extra zero here confused the Emacs
2347 code for unexec, and might confuse other programs too.
2348 Therefore, I took out that change.
2349 In future versions we should find another way to solve
2350 that dbx problem. -- rms, 23 May 93. */
2352 /* Don't let the first function fall at the same address
2353 as gcc_compiled., if profiling. */
2354 if (profile_flag || profile_block_flag)
2355 assemble_zeros (UNITS_PER_WORD);
2358 /* If dbx symbol table desired, initialize writing it
2359 and output the predefined types. */
2360 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
2361 if (write_symbols == DBX_DEBUG || write_symbols == XCOFF_DEBUG)
2362 TIMEVAR (symout_time, dbxout_init (asm_out_file, main_input_filename,
2365 #ifdef SDB_DEBUGGING_INFO
2366 if (write_symbols == SDB_DEBUG)
2367 TIMEVAR (symout_time, sdbout_init (asm_out_file, main_input_filename,
2370 #ifdef DWARF_DEBUGGING_INFO
2371 if (write_symbols == DWARF_DEBUG)
2372 TIMEVAR (symout_time, dwarfout_init (asm_out_file, main_input_filename));
2375 /* Initialize yet another pass. */
2377 if (!output_bytecode)
2378 init_final (main_input_filename);
2380 start_time = get_run_time ();
2382 /* Call the parser, which parses the entire file
2383 (calling rest_of_compilation for each function). */
2385 if (yyparse () != 0)
2387 if (errorcount == 0)
2388 fprintf (stderr, "Errors detected in input file (your bison.simple is out of date)");
2390 /* In case there were missing closebraces,
2391 get us back to the global binding level. */
2392 while (! global_bindings_p ())
2396 /* Compilation is now finished except for writing
2397 what's left of the symbol table output. */
2399 parse_time += get_run_time () - start_time;
2401 parse_time -= integration_time;
2402 parse_time -= varconst_time;
2404 globals = getdecls ();
2406 /* Really define vars that have had only a tentative definition.
2407 Really output inline functions that must actually be callable
2408 and have not been output so far. */
2411 int len = list_length (globals);
2412 tree *vec = (tree *) alloca (sizeof (tree) * len);
2417 /* Process the decls in reverse order--earliest first.
2418 Put them into VEC from back to front, then take out from front. */
2420 for (i = 0, decl = globals; i < len; i++, decl = TREE_CHAIN (decl))
2421 vec[len - i - 1] = decl;
2423 for (i = 0; i < len; i++)
2427 /* We're not deferring this any longer. */
2428 DECL_DEFER_OUTPUT (decl) = 0;
2430 if (TREE_CODE (decl) == VAR_DECL && DECL_SIZE (decl) == 0
2431 && incomplete_decl_finalize_hook != 0)
2432 (*incomplete_decl_finalize_hook) (decl);
2435 /* Now emit any global variables or functions that we have been putting
2436 off. We need to loop in case one of the things emitted here
2437 references another one which comes earlier in the list. */
2441 for (i = 0; i < len; i++)
2445 if (TREE_ASM_WRITTEN (decl) || DECL_EXTERNAL (decl))
2448 /* Don't write out static consts, unless we still need them.
2450 We also keep static consts if not optimizing (for debugging).
2451 ??? They might be better written into the debug information.
2452 This is possible when using DWARF.
2454 A language processor that wants static constants to be always
2455 written out (even if it is not used) is responsible for
2456 calling rest_of_decl_compilation itself. E.g. the C front-end
2457 calls rest_of_decl_compilation from finish_decl.
2458 One motivation for this is that is conventional in some
2459 environments to write things like:
2460 static const char rcsid[] = "... version string ...";
2461 intending to force the string to be in the executable.
2463 A language processor that would prefer to have unneeded
2464 static constants "optimized away" would just defer writing
2465 them out until here. E.g. C++ does this, because static
2466 constants are often defined in header files.
2468 ??? A tempting alternative (for both C and C++) would be
2469 to force a constant to be written if and only if it is
2470 defined in a main file, as opposed to an include file. */
2472 if (TREE_CODE (decl) == VAR_DECL && TREE_STATIC (decl)
2473 && (! TREE_READONLY (decl)
2474 || TREE_PUBLIC (decl)
2476 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl))))
2479 rest_of_decl_compilation (decl, NULL_PTR, 1, 1);
2482 if (TREE_CODE (decl) == FUNCTION_DECL
2483 && DECL_INITIAL (decl) != 0
2484 && DECL_SAVED_INSNS (decl) != 0
2485 && (flag_keep_inline_functions
2486 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl))))
2489 temporary_allocation ();
2490 output_inline_function (decl);
2491 permanent_allocation (1);
2496 for (i = 0; i < len; i++)
2500 if (TREE_CODE (decl) == VAR_DECL && TREE_STATIC (decl)
2501 && ! TREE_ASM_WRITTEN (decl))
2502 /* Cancel the RTL for this decl so that, if debugging info
2503 output for global variables is still to come,
2504 this one will be omitted. */
2505 DECL_RTL (decl) = NULL;
2507 /* Warn about any function
2508 declared static but not defined.
2509 We don't warn about variables,
2510 because many programs have static variables
2511 that exist only to get some text into the object file. */
2512 if (TREE_CODE (decl) == FUNCTION_DECL
2514 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl)))
2515 && DECL_INITIAL (decl) == 0
2516 && DECL_EXTERNAL (decl)
2517 && ! TREE_PUBLIC (decl))
2519 pedwarn_with_decl (decl,
2520 "`%s' declared `static' but never defined");
2521 /* This symbol is effectively an "extern" declaration now. */
2522 TREE_PUBLIC (decl) = 1;
2523 assemble_external (decl);
2526 /* Warn about static fns or vars defined but not used,
2527 but not about inline functions or static consts
2528 since defining those in header files is normal practice. */
2530 && ((TREE_CODE (decl) == FUNCTION_DECL && ! DECL_INLINE (decl))
2531 || (TREE_CODE (decl) == VAR_DECL && ! TREE_READONLY (decl)))
2532 && ! DECL_IN_SYSTEM_HEADER (decl)
2533 && ! DECL_EXTERNAL (decl)
2534 && ! TREE_PUBLIC (decl)
2535 && ! TREE_USED (decl)
2536 && ! DECL_REGISTER (decl)
2537 /* The TREE_USED bit for file-scope decls
2538 is kept in the identifier, to handle multiple
2539 external decls in different scopes. */
2540 && ! TREE_USED (DECL_NAME (decl)))
2541 warning_with_decl (decl, "`%s' defined but not used");
2543 #ifdef SDB_DEBUGGING_INFO
2544 /* The COFF linker can move initialized global vars to the end.
2545 And that can screw up the symbol ordering.
2546 By putting the symbols in that order to begin with,
2547 we avoid a problem. mcsun!unido!fauern!tumuc!pes@uunet.uu.net. */
2548 if (write_symbols == SDB_DEBUG && TREE_CODE (decl) == VAR_DECL
2549 && TREE_PUBLIC (decl) && DECL_INITIAL (decl)
2550 && ! DECL_EXTERNAL (decl)
2551 && DECL_RTL (decl) != 0)
2552 TIMEVAR (symout_time, sdbout_symbol (decl, 0));
2554 /* Output COFF information for non-global
2555 file-scope initialized variables. */
2556 if (write_symbols == SDB_DEBUG
2557 && TREE_CODE (decl) == VAR_DECL
2558 && DECL_INITIAL (decl)
2559 && ! DECL_EXTERNAL (decl)
2560 && DECL_RTL (decl) != 0
2561 && GET_CODE (DECL_RTL (decl)) == MEM)
2562 TIMEVAR (symout_time, sdbout_toplevel_data (decl));
2563 #endif /* SDB_DEBUGGING_INFO */
2564 #ifdef DWARF_DEBUGGING_INFO
2565 /* Output DWARF information for file-scope tentative data object
2566 declarations, file-scope (extern) function declarations (which
2567 had no corresponding body) and file-scope tagged type declarations
2568 and definitions which have not yet been forced out. */
2570 if (write_symbols == DWARF_DEBUG
2571 && (TREE_CODE (decl) != FUNCTION_DECL || !DECL_INITIAL (decl)))
2572 TIMEVAR (symout_time, dwarfout_file_scope_decl (decl, 1));
2577 /* Do dbx symbols */
2578 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
2579 if (write_symbols == DBX_DEBUG || write_symbols == XCOFF_DEBUG)
2580 TIMEVAR (symout_time,
2582 dbxout_finish (asm_out_file, main_input_filename);
2586 #ifdef DWARF_DEBUGGING_INFO
2587 if (write_symbols == DWARF_DEBUG)
2588 TIMEVAR (symout_time,
2594 /* Output some stuff at end of file if nec. */
2596 if (!output_bytecode)
2598 end_final (main_input_filename);
2601 ASM_FILE_END (asm_out_file);
2605 /* Language-specific end of compilation actions. */
2609 if (output_bytecode)
2610 bc_write_file (asm_out_file);
2612 /* Close the dump files. */
2614 if (flag_gen_aux_info)
2616 fclose (aux_info_file);
2618 unlink (aux_info_file_name);
2622 fclose (rtl_dump_file);
2625 fclose (jump_opt_dump_file);
2628 fclose (cse_dump_file);
2631 fclose (loop_dump_file);
2634 fclose (cse2_dump_file);
2637 fclose (flow_dump_file);
2641 dump_combine_total_stats (combine_dump_file);
2642 fclose (combine_dump_file);
2646 fclose (sched_dump_file);
2649 fclose (local_reg_dump_file);
2651 if (global_reg_dump)
2652 fclose (global_reg_dump_file);
2655 fclose (sched2_dump_file);
2658 fclose (jump2_opt_dump_file);
2661 fclose (dbr_sched_dump_file);
2665 fclose (stack_reg_dump_file);
2668 /* Close non-debugging input and output files. Take special care to note
2669 whether fclose returns an error, since the pages might still be on the
2670 buffer chain while the file is open. */
2673 if (ferror (asm_out_file) != 0 || fclose (asm_out_file) != 0)
2674 fatal_io_error (asm_file_name);
2676 /* Print the times. */
2680 fprintf (stderr,"\n");
2681 print_time ("parse", parse_time);
2683 if (!output_bytecode)
2685 print_time ("integration", integration_time);
2686 print_time ("jump", jump_time);
2687 print_time ("cse", cse_time);
2688 print_time ("loop", loop_time);
2689 print_time ("cse2", cse2_time);
2690 print_time ("flow", flow_time);
2691 print_time ("combine", combine_time);
2692 print_time ("sched", sched_time);
2693 print_time ("local-alloc", local_alloc_time);
2694 print_time ("global-alloc", global_alloc_time);
2695 print_time ("sched2", sched2_time);
2696 print_time ("dbranch", dbr_sched_time);
2697 print_time ("shorten-branch", shorten_branch_time);
2698 print_time ("stack-reg", stack_reg_time);
2699 print_time ("final", final_time);
2700 print_time ("varconst", varconst_time);
2701 print_time ("symout", symout_time);
2702 print_time ("dump", dump_time);
2707 /* This is called from various places for FUNCTION_DECL, VAR_DECL,
2708 and TYPE_DECL nodes.
2710 This does nothing for local (non-static) variables.
2711 Otherwise, it sets up the RTL and outputs any assembler code
2712 (label definition, storage allocation and initialization).
2714 DECL is the declaration. If ASMSPEC is nonzero, it specifies
2715 the assembler symbol name to be used. TOP_LEVEL is nonzero
2716 if this declaration is not within a function. */
2719 rest_of_decl_compilation (decl, asmspec, top_level, at_end)
2725 /* Declarations of variables, and of functions defined elsewhere. */
2727 /* The most obvious approach, to put an #ifndef around where
2728 this macro is used, doesn't work since it's inside a macro call. */
2729 #ifndef ASM_FINISH_DECLARE_OBJECT
2730 #define ASM_FINISH_DECLARE_OBJECT(FILE, DECL, TOP, END)
2733 /* Forward declarations for nested functions are not "external",
2734 but we need to treat them as if they were. */
2735 if (TREE_STATIC (decl) || DECL_EXTERNAL (decl)
2736 || TREE_CODE (decl) == FUNCTION_DECL)
2737 TIMEVAR (varconst_time,
2739 make_decl_rtl (decl, asmspec, top_level);
2740 /* Initialized extern variable exists to be replaced
2741 with its value, or represents something that will be
2742 output in another file. */
2743 if (! (TREE_CODE (decl) == VAR_DECL
2744 && DECL_EXTERNAL (decl) && TREE_READONLY (decl)
2745 && DECL_INITIAL (decl) != 0
2746 && DECL_INITIAL (decl) != error_mark_node))
2747 /* Don't output anything
2748 when a tentative file-scope definition is seen.
2749 But at end of compilation, do output code for them. */
2750 if (! (! at_end && top_level
2751 && (DECL_INITIAL (decl) == 0
2752 || DECL_INITIAL (decl) == error_mark_node)))
2753 assemble_variable (decl, top_level, at_end, 0);
2754 if (decl == last_assemble_variable_decl)
2756 ASM_FINISH_DECLARE_OBJECT (asm_out_file, decl,
2760 else if (DECL_REGISTER (decl) && asmspec != 0)
2762 if (decode_reg_name (asmspec) >= 0)
2764 DECL_RTL (decl) = 0;
2765 make_decl_rtl (decl, asmspec, top_level);
2768 error ("invalid register name `%s' for register variable", asmspec);
2770 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
2771 else if ((write_symbols == DBX_DEBUG || write_symbols == XCOFF_DEBUG)
2772 && TREE_CODE (decl) == TYPE_DECL)
2773 TIMEVAR (symout_time, dbxout_symbol (decl, 0));
2775 #ifdef SDB_DEBUGGING_INFO
2776 else if (write_symbols == SDB_DEBUG && top_level
2777 && TREE_CODE (decl) == TYPE_DECL)
2778 TIMEVAR (symout_time, sdbout_symbol (decl, 0));
2782 /* Called after finishing a record, union or enumeral type. */
2785 rest_of_type_compilation (type, toplev)
2789 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
2790 if (write_symbols == DBX_DEBUG || write_symbols == XCOFF_DEBUG)
2791 TIMEVAR (symout_time, dbxout_symbol (TYPE_STUB_DECL (type), !toplev));
2793 #ifdef SDB_DEBUGGING_INFO
2794 if (write_symbols == SDB_DEBUG)
2795 TIMEVAR (symout_time, sdbout_symbol (TYPE_STUB_DECL (type), !toplev));
2799 /* This is called from finish_function (within yyparse)
2800 after each top-level definition is parsed.
2801 It is supposed to compile that function or variable
2802 and output the assembler code for it.
2803 After we return, the tree storage is freed. */
2806 rest_of_compilation (decl)
2810 int start_time = get_run_time ();
2812 /* Nonzero if we have saved the original DECL_INITIAL of the function,
2813 to be restored after we finish compiling the function
2814 (for use when compiling inline calls to this function). */
2815 tree saved_block_tree = 0;
2816 /* Likewise, for DECL_ARGUMENTS. */
2817 tree saved_arguments = 0;
2820 if (output_bytecode)
2823 /* If we are reconsidering an inline function
2824 at the end of compilation, skip the stuff for making it inline. */
2826 if (DECL_SAVED_INSNS (decl) == 0)
2828 int specd = DECL_INLINE (decl);
2831 /* If requested, consider whether to make this function inline. */
2832 if (specd || flag_inline_functions)
2833 TIMEVAR (integration_time,
2835 lose = function_cannot_inline_p (decl);
2836 /* If not optimzing, then make sure the DECL_INLINE
2838 if (lose || ! optimize)
2840 if (warn_inline && specd)
2841 warning_with_decl (decl, lose);
2842 DECL_INLINE (decl) = 0;
2843 DECL_ABSTRACT_ORIGIN (decl) = 0;
2844 /* Don't really compile an extern inline function.
2845 If we can't make it inline, pretend
2846 it was only declared. */
2847 if (DECL_EXTERNAL (decl))
2849 DECL_INITIAL (decl) = 0;
2850 goto exit_rest_of_compilation;
2854 DECL_INLINE (decl) = 1;
2857 insns = get_insns ();
2859 /* Dump the rtl code if we are dumping rtl. */
2864 fprintf (rtl_dump_file, "\n;; Function %s\n\n",
2865 IDENTIFIER_POINTER (DECL_NAME (decl)));
2866 if (DECL_SAVED_INSNS (decl))
2867 fprintf (rtl_dump_file, ";; (integrable)\n\n");
2868 print_rtl (rtl_dump_file, insns);
2869 fflush (rtl_dump_file);
2872 /* If function is inline, and we don't yet know whether to
2873 compile it by itself, defer decision till end of compilation.
2874 finish_compilation will call rest_of_compilation again
2875 for those functions that need to be output. Also defer those
2876 functions that we are supposed to defer. */
2878 if (DECL_DEFER_OUTPUT (decl)
2879 || ((specd || DECL_INLINE (decl))
2880 && ((! TREE_PUBLIC (decl) && ! TREE_ADDRESSABLE (decl)
2881 && ! flag_keep_inline_functions)
2882 || DECL_EXTERNAL (decl))))
2884 DECL_DEFER_OUTPUT (decl) = 1;
2886 /* If -Wreturn-type, we have to do a bit of compilation. */
2887 if (! warn_return_type)
2889 #ifdef DWARF_DEBUGGING_INFO
2890 /* Generate the DWARF info for the "abstract" instance
2891 of a function which we may later generate inlined and/or
2892 out-of-line instances of. */
2893 if (write_symbols == DWARF_DEBUG)
2895 set_decl_abstract_flags (decl, 1);
2896 TIMEVAR (symout_time, dwarfout_file_scope_decl (decl, 0));
2897 set_decl_abstract_flags (decl, 0);
2900 TIMEVAR (integration_time, save_for_inline_nocopy (decl));
2901 goto exit_rest_of_compilation;
2905 /* If we have to compile the function now, save its rtl and subdecls
2906 so that its compilation will not affect what others get. */
2907 if (DECL_INLINE (decl) || DECL_DEFER_OUTPUT (decl))
2909 #ifdef DWARF_DEBUGGING_INFO
2910 /* Generate the DWARF info for the "abstract" instance of
2911 a function which we will generate an out-of-line instance
2912 of almost immediately (and which we may also later generate
2913 various inlined instances of). */
2914 if (write_symbols == DWARF_DEBUG)
2916 set_decl_abstract_flags (decl, 1);
2917 TIMEVAR (symout_time, dwarfout_file_scope_decl (decl, 0));
2918 set_decl_abstract_flags (decl, 0);
2921 saved_block_tree = DECL_INITIAL (decl);
2922 saved_arguments = DECL_ARGUMENTS (decl);
2923 TIMEVAR (integration_time, save_for_inline_copying (decl));
2926 /* If specified extern inline but we aren't inlining it, we are
2928 if (specd && DECL_EXTERNAL (decl))
2929 goto exit_rest_of_compilation;
2932 if (! DECL_DEFER_OUTPUT (decl))
2933 TREE_ASM_WRITTEN (decl) = 1;
2935 /* Now that integrate will no longer see our rtl, we need not distinguish
2936 between the return value of this function and the return value of called
2938 rtx_equal_function_value_matters = 0;
2940 /* Don't return yet if -Wreturn-type; we need to do jump_optimize. */
2941 if ((rtl_dump_and_exit || flag_syntax_only) && !warn_return_type)
2943 goto exit_rest_of_compilation;
2946 /* From now on, allocate rtl in current_obstack, not in saveable_obstack.
2947 Note that that may have been done above, in save_for_inline_copying.
2948 The call to resume_temporary_allocation near the end of this function
2949 goes back to the usual state of affairs. */
2951 rtl_in_current_obstack ();
2954 /* If we are doing position-independent code generation, now
2955 is the time to output special prologues and epilogues.
2956 We do not want to do this earlier, because it just clutters
2957 up inline functions with meaningless insns. */
2962 insns = get_insns ();
2964 /* Copy any shared structure that should not be shared. */
2966 unshare_all_rtl (insns);
2968 /* Instantiate all virtual registers. */
2970 instantiate_virtual_regs (current_function_decl, get_insns ());
2972 /* See if we have allocated stack slots that are not directly addressable.
2973 If so, scan all the insns and create explicit address computation
2974 for all references to such slots. */
2975 /* fixup_stack_slots (); */
2977 /* Do jump optimization the first time, if -opt.
2978 Also do it if -W, but in that case it doesn't change the rtl code,
2979 it only computes whether control can drop off the end of the function. */
2981 if (optimize > 0 || extra_warnings || warn_return_type
2982 /* If function is `noreturn', we should warn if it tries to return. */
2983 || TREE_THIS_VOLATILE (decl))
2985 TIMEVAR (jump_time, reg_scan (insns, max_reg_num (), 0));
2986 TIMEVAR (jump_time, jump_optimize (insns, 0, 0, 1));
2989 /* Now is when we stop if -fsyntax-only and -Wreturn-type. */
2990 if (rtl_dump_and_exit || flag_syntax_only || DECL_DEFER_OUTPUT (decl))
2991 goto exit_rest_of_compilation;
2993 /* Dump rtl code after jump, if we are doing that. */
2998 fprintf (jump_opt_dump_file, "\n;; Function %s\n\n",
2999 IDENTIFIER_POINTER (DECL_NAME (decl)));
3000 print_rtl (jump_opt_dump_file, insns);
3001 fflush (jump_opt_dump_file);
3004 /* Perform common subexpression elimination.
3005 Nonzero value from `cse_main' means that jumps were simplified
3006 and some code may now be unreachable, so do
3007 jump optimization again. */
3012 fprintf (cse_dump_file, "\n;; Function %s\n\n",
3013 IDENTIFIER_POINTER (DECL_NAME (decl)));
3018 TIMEVAR (cse_time, reg_scan (insns, max_reg_num (), 1));
3020 if (flag_thread_jumps)
3021 /* Hacks by tiemann & kenner. */
3022 TIMEVAR (jump_time, thread_jumps (insns, max_reg_num (), 1));
3024 TIMEVAR (cse_time, tem = cse_main (insns, max_reg_num (),
3026 TIMEVAR (cse_time, delete_dead_from_cse (insns, max_reg_num ()));
3028 if (tem || optimize > 1)
3029 TIMEVAR (jump_time, jump_optimize (insns, 0, 0, 0));
3032 /* Dump rtl code after cse, if we are doing that. */
3037 print_rtl (cse_dump_file, insns);
3038 fflush (cse_dump_file);
3044 fprintf (loop_dump_file, "\n;; Function %s\n\n",
3045 IDENTIFIER_POINTER (DECL_NAME (decl)));
3048 /* Move constant computations out of loops. */
3054 loop_optimize (insns, loop_dump_file);
3058 /* Dump rtl code after loop opt, if we are doing that. */
3063 print_rtl (loop_dump_file, insns);
3064 fflush (loop_dump_file);
3070 fprintf (cse2_dump_file, "\n;; Function %s\n\n",
3071 IDENTIFIER_POINTER (DECL_NAME (decl)));
3074 if (optimize > 0 && flag_rerun_cse_after_loop)
3076 /* Running another jump optimization pass before the second
3077 cse pass sometimes simplifies the RTL enough to allow
3078 the second CSE pass to do a better job. Jump_optimize can change
3079 max_reg_num so we must rerun reg_scan afterwards.
3080 ??? Rework to not call reg_scan so often. */
3081 TIMEVAR (jump_time, reg_scan (insns, max_reg_num (), 0));
3082 TIMEVAR (jump_time, jump_optimize (insns, 0, 0, 1));
3084 TIMEVAR (cse2_time, reg_scan (insns, max_reg_num (), 0));
3085 TIMEVAR (cse2_time, tem = cse_main (insns, max_reg_num (),
3086 1, cse2_dump_file));
3088 TIMEVAR (jump_time, jump_optimize (insns, 0, 0, 0));
3091 if (optimize > 0 && flag_thread_jumps)
3092 /* This pass of jump threading straightens out code
3093 that was kinked by loop optimization. */
3094 TIMEVAR (jump_time, thread_jumps (insns, max_reg_num (), 0));
3096 /* Dump rtl code after cse, if we are doing that. */
3101 print_rtl (cse2_dump_file, insns);
3102 fflush (cse2_dump_file);
3105 /* We are no longer anticipating cse in this function, at least. */
3107 cse_not_expected = 1;
3109 /* Now we choose between stupid (pcc-like) register allocation
3110 (if we got the -noreg switch and not -opt)
3111 and smart register allocation. */
3113 if (optimize > 0) /* Stupid allocation probably won't work */
3114 obey_regdecls = 0; /* if optimizations being done. */
3118 /* Print function header into flow dump now
3119 because doing the flow analysis makes some of the dump. */
3124 fprintf (flow_dump_file, "\n;; Function %s\n\n",
3125 IDENTIFIER_POINTER (DECL_NAME (decl)));
3132 regclass (insns, max_reg_num ());
3133 stupid_life_analysis (insns, max_reg_num (),
3139 /* Do control and data flow analysis,
3140 and write some of the results to dump file. */
3142 TIMEVAR (flow_time, flow_analysis (insns, max_reg_num (),
3144 if (warn_uninitialized)
3146 uninitialized_vars_warning (DECL_INITIAL (decl));
3147 setjmp_args_warning ();
3151 /* Dump rtl after flow analysis. */
3156 print_rtl (flow_dump_file, insns);
3157 fflush (flow_dump_file);
3160 /* If -opt, try combining insns through substitution. */
3163 TIMEVAR (combine_time, combine_instructions (insns, max_reg_num ()));
3165 /* Dump rtl code after insn combination. */
3170 fprintf (combine_dump_file, "\n;; Function %s\n\n",
3171 IDENTIFIER_POINTER (DECL_NAME (decl)));
3172 dump_combine_stats (combine_dump_file);
3173 print_rtl (combine_dump_file, insns);
3174 fflush (combine_dump_file);
3177 /* Print function header into sched dump now
3178 because doing the sched analysis makes some of the dump. */
3183 fprintf (sched_dump_file, "\n;; Function %s\n\n",
3184 IDENTIFIER_POINTER (DECL_NAME (decl)));
3187 if (optimize > 0 && flag_schedule_insns)
3189 /* Do control and data sched analysis,
3190 and write some of the results to dump file. */
3192 TIMEVAR (sched_time, schedule_insns (sched_dump_file));
3195 /* Dump rtl after instruction scheduling. */
3200 print_rtl (sched_dump_file, insns);
3201 fflush (sched_dump_file);
3204 /* Unless we did stupid register allocation,
3205 allocate pseudo-regs that are used only within 1 basic block. */
3208 TIMEVAR (local_alloc_time,
3210 regclass (insns, max_reg_num ());
3214 /* Dump rtl code after allocating regs within basic blocks. */
3219 fprintf (local_reg_dump_file, "\n;; Function %s\n\n",
3220 IDENTIFIER_POINTER (DECL_NAME (decl)));
3221 dump_flow_info (local_reg_dump_file);
3222 dump_local_alloc (local_reg_dump_file);
3223 print_rtl (local_reg_dump_file, insns);
3224 fflush (local_reg_dump_file);
3227 if (global_reg_dump)
3229 fprintf (global_reg_dump_file, "\n;; Function %s\n\n",
3230 IDENTIFIER_POINTER (DECL_NAME (decl))));
3232 /* Unless we did stupid register allocation,
3233 allocate remaining pseudo-regs, then do the reload pass
3234 fixing up any insns that are invalid. */
3236 TIMEVAR (global_alloc_time,
3239 failure = global_alloc (global_reg_dump_file);
3241 failure = reload (insns, 0, global_reg_dump_file);
3244 if (global_reg_dump)
3247 dump_global_regs (global_reg_dump_file);
3248 print_rtl (global_reg_dump_file, insns);
3249 fflush (global_reg_dump_file);
3253 goto exit_rest_of_compilation;
3255 reload_completed = 1;
3257 /* On some machines, the prologue and epilogue code, or parts thereof,
3258 can be represented as RTL. Doing so lets us schedule insns between
3259 it and the rest of the code and also allows delayed branch
3260 scheduling to operate in the epilogue. */
3262 thread_prologue_and_epilogue_insns (insns);
3264 if (optimize > 0 && flag_schedule_insns_after_reload)
3269 fprintf (sched2_dump_file, "\n;; Function %s\n\n",
3270 IDENTIFIER_POINTER (DECL_NAME (decl)));
3273 /* Do control and data sched analysis again,
3274 and write some more of the results to dump file. */
3276 TIMEVAR (sched2_time, schedule_insns (sched2_dump_file));
3278 /* Dump rtl after post-reorder instruction scheduling. */
3283 print_rtl (sched2_dump_file, insns);
3284 fflush (sched2_dump_file);
3288 #ifdef LEAF_REGISTERS
3290 if (optimize > 0 && only_leaf_regs_used () && leaf_function_p ())
3294 /* One more attempt to remove jumps to .+1
3295 left by dead-store-elimination.
3296 Also do cross-jumping this time
3297 and delete no-op move insns. */
3301 TIMEVAR (jump_time, jump_optimize (insns, 1, 1, 0));
3304 /* Dump rtl code after jump, if we are doing that. */
3309 fprintf (jump2_opt_dump_file, "\n;; Function %s\n\n",
3310 IDENTIFIER_POINTER (DECL_NAME (decl)));
3311 print_rtl (jump2_opt_dump_file, insns);
3312 fflush (jump2_opt_dump_file);
3315 /* If a machine dependent reorganization is needed, call it. */
3316 #ifdef MACHINE_DEPENDENT_REORG
3317 MACHINE_DEPENDENT_REORG (insns);
3320 /* If a scheduling pass for delayed branches is to be done,
3321 call the scheduling code. */
3324 if (optimize > 0 && flag_delayed_branch)
3326 TIMEVAR (dbr_sched_time, dbr_schedule (insns, dbr_sched_dump_file));
3331 fprintf (dbr_sched_dump_file, "\n;; Function %s\n\n",
3332 IDENTIFIER_POINTER (DECL_NAME (decl)));
3333 print_rtl (dbr_sched_dump_file, insns);
3334 fflush (dbr_sched_dump_file);
3341 /* Shorten branches. */
3342 TIMEVAR (shorten_branch_time,
3344 shorten_branches (get_insns ());
3348 TIMEVAR (stack_reg_time, reg_to_stack (insns, stack_reg_dump_file));
3353 fprintf (stack_reg_dump_file, "\n;; Function %s\n\n",
3354 IDENTIFIER_POINTER (DECL_NAME (decl)));
3355 print_rtl (stack_reg_dump_file, insns);
3356 fflush (stack_reg_dump_file);
3361 /* Now turn the rtl into assembler code. */
3363 TIMEVAR (final_time,
3368 /* Get the function's name, as described by its RTL.
3369 This may be different from the DECL_NAME name used
3370 in the source file. */
3372 x = DECL_RTL (decl);
3373 if (GET_CODE (x) != MEM)
3376 if (GET_CODE (x) != SYMBOL_REF)
3378 fnname = XSTR (x, 0);
3380 assemble_start_function (decl, fnname);
3381 final_start_function (insns, asm_out_file, optimize);
3382 final (insns, asm_out_file, optimize, 0);
3383 final_end_function (insns, asm_out_file, optimize);
3384 assemble_end_function (decl, fnname);
3385 fflush (asm_out_file);
3388 /* Write DBX symbols if requested */
3390 /* Note that for those inline functions where we don't initially
3391 know for certain that we will be generating an out-of-line copy,
3392 the first invocation of this routine (rest_of_compilation) will
3393 skip over this code by doing a `goto exit_rest_of_compilation;'.
3394 Later on, finish_compilation will call rest_of_compilation again
3395 for those inline functions that need to have out-of-line copies
3396 generated. During that call, we *will* be routed past here. */
3398 #ifdef DBX_DEBUGGING_INFO
3399 if (write_symbols == DBX_DEBUG)
3400 TIMEVAR (symout_time, dbxout_function (decl));
3403 #ifdef DWARF_DEBUGGING_INFO
3404 if (write_symbols == DWARF_DEBUG)
3405 TIMEVAR (symout_time, dwarfout_file_scope_decl (decl, 0));
3408 exit_rest_of_compilation:
3410 /* In case the function was not output,
3411 don't leave any temporary anonymous types
3412 queued up for sdb output. */
3413 #ifdef SDB_DEBUGGING_INFO
3414 if (write_symbols == SDB_DEBUG)
3415 sdbout_types (NULL_TREE);
3418 /* Put back the tree of subblocks and list of arguments
3419 from before we copied them.
3420 Code generation and the output of debugging info may have modified
3421 the copy, but the original is unchanged. */
3423 if (saved_block_tree != 0)
3424 DECL_INITIAL (decl) = saved_block_tree;
3425 if (saved_arguments != 0)
3426 DECL_ARGUMENTS (decl) = saved_arguments;
3428 reload_completed = 0;
3430 /* Clear out the real_constant_chain before some of the rtx's
3431 it runs through become garbage. */
3433 clear_const_double_mem ();
3435 /* Cancel the effect of rtl_in_current_obstack. */
3437 resume_temporary_allocation ();
3439 /* The parsing time is all the time spent in yyparse
3440 *except* what is spent in this function. */
3442 parse_time -= get_run_time () - start_time;
3445 /* Entry point of cc1/c++. Decode command args, then call compile_file.
3446 Exit code is 35 if can't open files, 34 if fatal error,
3447 33 if had nonfatal errors, else success. */
3450 main (argc, argv, envp)
3457 int flag_print_mem = 0;
3458 int version_flag = 0;
3461 /* save in case md file wants to emit args as a comment. */
3465 p = argv[0] + strlen (argv[0]);
3466 while (p != argv[0] && p[-1] != '/'
3467 #ifdef DIR_SEPARATOR
3468 && p[-1] != DIR_SEPARATOR
3475 /* Get rid of any avoidable limit on stack size. */
3479 /* Set the stack limit huge so that alloca does not fail. */
3480 getrlimit (RLIMIT_STACK, &rlim);
3481 rlim.rlim_cur = rlim.rlim_max;
3482 setrlimit (RLIMIT_STACK, &rlim);
3484 #endif /* RLIMIT_STACK */
3486 signal (SIGFPE, float_signal);
3489 signal (SIGPIPE, pipe_closed);
3492 decl_printable_name = decl_name;
3493 lang_expand_expr = (struct rtx_def *(*)()) do_abort;
3494 interim_eh_hook = interim_eh;
3496 /* Initialize whether `char' is signed. */
3497 flag_signed_char = DEFAULT_SIGNED_CHAR;
3498 #ifdef DEFAULT_SHORT_ENUMS
3499 /* Initialize how much space enums occupy, by default. */
3500 flag_short_enums = DEFAULT_SHORT_ENUMS;
3503 /* Scan to see what optimization level has been specified. That will
3504 determine the default value of many flags. */
3505 for (i = 1; i < argc; i++)
3507 if (!strcmp (argv[i], "-O"))
3511 else if (argv[i][0] == '-' && argv[i][1] == 'O')
3513 /* Handle -O2, -O3, -O69, ... */
3514 char *p = &argv[i][2];
3518 if (! (c >= '0' && c <= '9'))
3521 optimize = atoi (&argv[i][2]);
3525 obey_regdecls = (optimize == 0);
3535 flag_thread_jumps = 1;
3537 flag_delayed_branch = 1;
3539 #ifdef CAN_DEBUG_WITHOUT_FP
3540 flag_omit_frame_pointer = 1;
3546 flag_cse_follow_jumps = 1;
3547 flag_cse_skip_blocks = 1;
3548 flag_expensive_optimizations = 1;
3549 flag_strength_reduce = 1;
3550 flag_rerun_cse_after_loop = 1;
3551 flag_caller_saves = 1;
3552 #ifdef INSN_SCHEDULING
3553 flag_schedule_insns = 1;
3554 flag_schedule_insns_after_reload = 1;
3560 flag_inline_functions = 1;
3563 #ifdef OPTIMIZATION_OPTIONS
3564 /* Allow default optimizations to be specified on a per-machine basis. */
3565 OPTIMIZATION_OPTIONS (optimize);
3568 /* Initialize register usage now so switches may override. */
3572 set_target_switch ("");
3574 for (i = 1; i < argc; i++)
3577 /* If this is a language-specific option,
3578 decode it in a language-specific way. */
3579 for (j = 0; lang_options[j] != 0; j++)
3580 if (!strncmp (argv[i], lang_options[j],
3581 strlen (lang_options[j])))
3583 if (lang_options[j] != 0)
3584 /* If the option is valid for *some* language,
3585 treat it as valid even if this language doesn't understand it. */
3586 lang_decode_option (argv[i]);
3587 else if (argv[i][0] == '-' && argv[i][1] != 0)
3589 register char *str = argv[i] + 1;
3594 set_target_switch (&str[1]);
3595 else if (!strcmp (str, "dumpbase"))
3597 dump_base_name = argv[++i];
3599 else if (str[0] == 'd')
3601 register char *p = &str[1];
3609 global_reg_dump = 1;
3615 cse_dump = 1, cse2_dump = 1;
3633 global_reg_dump = 1;
3651 flag_print_asm_name = 1;
3673 rtl_dump_and_exit = 1;
3677 else if (str[0] == 'f')
3679 register char *p = &str[1];
3682 /* Some kind of -f option.
3683 P's value is the option sans `-f'.
3684 Search for it in the table of options. */
3687 !found && j < sizeof (f_options) / sizeof (f_options[0]);
3690 if (!strcmp (p, f_options[j].string))
3692 *f_options[j].variable = f_options[j].on_value;
3693 /* A goto here would be cleaner,
3694 but breaks the vax pcc. */
3697 if (p[0] == 'n' && p[1] == 'o' && p[2] == '-'
3698 && ! strcmp (p+3, f_options[j].string))
3700 *f_options[j].variable = ! f_options[j].on_value;
3707 else if (!strncmp (p, "fixed-", 6))
3708 fix_register (&p[6], 1, 1);
3709 else if (!strncmp (p, "call-used-", 10))
3710 fix_register (&p[10], 0, 1);
3711 else if (!strncmp (p, "call-saved-", 11))
3712 fix_register (&p[11], 0, 0);
3714 error ("Invalid option `%s'", argv[i]);
3716 else if (str[0] == 'O')
3718 register char *p = str+1;
3719 while (*p && *p >= '0' && *p <= '9')
3724 error ("Invalid option `%s'", argv[i]);
3726 else if (!strcmp (str, "pedantic"))
3728 else if (!strcmp (str, "pedantic-errors"))
3729 flag_pedantic_errors = pedantic = 1;
3730 else if (!strcmp (str, "quiet"))
3732 else if (!strcmp (str, "version"))
3734 else if (!strcmp (str, "w"))
3735 inhibit_warnings = 1;
3736 else if (!strcmp (str, "W"))
3739 /* We save the value of warn_uninitialized, since if they put
3740 -Wuninitialized on the command line, we need to generate a
3741 warning about not using it without also specifying -O. */
3742 if (warn_uninitialized != 1)
3743 warn_uninitialized = 2;
3745 else if (str[0] == 'W')
3747 register char *p = &str[1];
3750 /* Some kind of -W option.
3751 P's value is the option sans `-W'.
3752 Search for it in the table of options. */
3755 !found && j < sizeof (W_options) / sizeof (W_options[0]);
3758 if (!strcmp (p, W_options[j].string))
3760 *W_options[j].variable = W_options[j].on_value;
3761 /* A goto here would be cleaner,
3762 but breaks the vax pcc. */
3765 if (p[0] == 'n' && p[1] == 'o' && p[2] == '-'
3766 && ! strcmp (p+3, W_options[j].string))
3768 *W_options[j].variable = ! W_options[j].on_value;
3775 else if (!strncmp (p, "id-clash-", 9))
3781 if (*endp >= '0' && *endp <= '9')
3785 error ("Invalid option `%s'", argv[i]);
3790 id_clash_len = atoi (str + 10);
3793 else if (!strncmp (p, "larger-than-", 12))
3795 char *endp = p + 12;
3799 if (*endp >= '0' && *endp <= '9')
3803 error ("Invalid option `%s'", argv[i]);
3804 goto larger_than_lose;
3807 warn_larger_than = 1;
3808 larger_than_size = atoi (str + 13);
3812 error ("Invalid option `%s'", argv[i]);
3814 else if (!strcmp (str, "p"))
3816 if (!output_bytecode)
3819 error ("profiling not supported in bytecode compilation");
3821 else if (!strcmp (str, "a"))
3823 #if !defined (BLOCK_PROFILER) || !defined (FUNCTION_BLOCK_PROFILER)
3824 warning ("`-a' option (basic block profile) not supported");
3826 profile_block_flag = 1;
3829 else if (str[0] == 'g')
3836 while (*p && (*p < '0' || *p > '9'))
3840 while (*q && (*q >= '0' && *q <= '9'))
3845 level = 2; /* default debugging info level */
3846 if (*q || level > 3)
3848 warning ("invalid debug level specification in option: `-%s'",
3850 warning ("no debugging information will be generated");
3854 /* If more than one debugging type is supported,
3855 you must define PREFERRED_DEBUGGING_TYPE
3856 to choose a format in a system-dependent way. */
3857 /* This is one long line cause VAXC can't handle a \-newline. */
3858 #if 1 < (defined (DBX_DEBUGGING_INFO) + defined (SDB_DEBUGGING_INFO) + defined (DWARF_DEBUGGING_INFO) + defined (XCOFF_DEBUGGING_INFO))
3859 #ifdef PREFERRED_DEBUGGING_TYPE
3860 if (!strncmp (str, "ggdb", len))
3861 write_symbols = PREFERRED_DEBUGGING_TYPE;
3862 #else /* no PREFERRED_DEBUGGING_TYPE */
3863 You Lose! You must define PREFERRED_DEBUGGING_TYPE!
3864 #endif /* no PREFERRED_DEBUGGING_TYPE */
3865 #endif /* More than one debugger format enabled. */
3866 #ifdef DBX_DEBUGGING_INFO
3867 if (write_symbols != NO_DEBUG)
3869 else if (!strncmp (str, "ggdb", len))
3870 write_symbols = DBX_DEBUG;
3871 else if (!strncmp (str, "gstabs", len))
3872 write_symbols = DBX_DEBUG;
3873 else if (!strncmp (str, "gstabs+", len))
3874 write_symbols = DBX_DEBUG;
3876 /* Always enable extensions for -ggdb or -gstabs+,
3877 always disable for -gstabs.
3878 For plain -g, use system-specific default. */
3879 if (write_symbols == DBX_DEBUG && !strncmp (str, "ggdb", len)
3881 use_gnu_debug_info_extensions = 1;
3882 else if (write_symbols == DBX_DEBUG && !strncmp (str, "gstabs+", len)
3884 use_gnu_debug_info_extensions = 1;
3885 else if (write_symbols == DBX_DEBUG
3886 && !strncmp (str, "gstabs", len) && len >= 2)
3887 use_gnu_debug_info_extensions = 0;
3889 use_gnu_debug_info_extensions = DEFAULT_GDB_EXTENSIONS;
3890 #endif /* DBX_DEBUGGING_INFO */
3891 #ifdef DWARF_DEBUGGING_INFO
3892 if (write_symbols != NO_DEBUG)
3894 else if (!strncmp (str, "g", len))
3895 write_symbols = DWARF_DEBUG;
3896 else if (!strncmp (str, "ggdb", len))
3897 write_symbols = DWARF_DEBUG;
3898 else if (!strncmp (str, "gdwarf", len))
3899 write_symbols = DWARF_DEBUG;
3901 /* Always enable extensions for -ggdb or -gdwarf+,
3902 always disable for -gdwarf.
3903 For plain -g, use system-specific default. */
3904 if (write_symbols == DWARF_DEBUG && !strncmp (str, "ggdb", len)
3906 use_gnu_debug_info_extensions = 1;
3907 else if (write_symbols == DWARF_DEBUG && !strcmp (str, "gdwarf+"))
3908 use_gnu_debug_info_extensions = 1;
3909 else if (write_symbols == DWARF_DEBUG
3910 && !strncmp (str, "gdwarf", len) && len >= 2)
3911 use_gnu_debug_info_extensions = 0;
3913 use_gnu_debug_info_extensions = DEFAULT_GDB_EXTENSIONS;
3915 #ifdef SDB_DEBUGGING_INFO
3916 if (write_symbols != NO_DEBUG)
3918 else if (!strncmp (str, "g", len))
3919 write_symbols = SDB_DEBUG;
3920 else if (!strncmp (str, "gdb", len))
3921 write_symbols = SDB_DEBUG;
3922 else if (!strncmp (str, "gcoff", len))
3923 write_symbols = SDB_DEBUG;
3924 #endif /* SDB_DEBUGGING_INFO */
3925 #ifdef XCOFF_DEBUGGING_INFO
3926 if (write_symbols != NO_DEBUG)
3928 else if (!strncmp (str, "g", len))
3929 write_symbols = XCOFF_DEBUG;
3930 else if (!strncmp (str, "ggdb", len))
3931 write_symbols = XCOFF_DEBUG;
3932 else if (!strncmp (str, "gxcoff", len))
3933 write_symbols = XCOFF_DEBUG;
3935 /* Always enable extensions for -ggdb or -gxcoff+,
3936 always disable for -gxcoff.
3937 For plain -g, use system-specific default. */
3938 if (write_symbols == XCOFF_DEBUG && !strncmp (str, "ggdb", len)
3940 use_gnu_debug_info_extensions = 1;
3941 else if (write_symbols == XCOFF_DEBUG && !strcmp (str, "gxcoff+"))
3942 use_gnu_debug_info_extensions = 1;
3943 else if (write_symbols == XCOFF_DEBUG
3944 && !strncmp (str, "gxcoff", len) && len >= 2)
3945 use_gnu_debug_info_extensions = 0;
3947 use_gnu_debug_info_extensions = DEFAULT_GDB_EXTENSIONS;
3949 if (write_symbols == NO_DEBUG)
3950 warning ("`-%s' option not supported on this version of GCC", str);
3951 else if (level == 0)
3952 write_symbols = NO_DEBUG;
3954 debug_info_level = (enum debug_info_level) level;
3956 else if (!strcmp (str, "o"))
3958 asm_file_name = argv[++i];
3960 else if (str[0] == 'G')
3962 g_switch_set = TRUE;
3963 g_switch_value = atoi ((str[1] != '\0') ? str+1 : argv[++i]);
3965 else if (!strncmp (str, "aux-info", 8))
3967 flag_gen_aux_info = 1;
3968 aux_info_file_name = (str[8] != '\0' ? str+8 : argv[++i]);
3971 error ("Invalid option `%s'", argv[i]);
3973 else if (argv[i][0] == '+')
3974 error ("Invalid option `%s'", argv[i]);
3979 /* Initialize for bytecode output. A good idea to do this as soon as
3980 possible after the "-f" options have been parsed. */
3981 if (output_bytecode)
3983 #ifndef TARGET_SUPPORTS_BYTECODE
3984 /* Just die with a fatal error if not supported */
3985 fatal ("-fbytecode not supporter for this target");
3993 /* Inlining does not work if not optimizing,
3994 so force it not to be done. */
3998 /* The c_decode_option and lang_decode_option functions set
3999 this to `2' if -Wall is used, so we can avoid giving out
4000 lots of errors for people who don't realize what -Wall does. */
4001 if (warn_uninitialized == 1)
4002 warning ("-Wuninitialized is not supported without -O");
4005 #if defined(DWARF_DEBUGGING_INFO)
4006 if (write_symbols == DWARF_DEBUG
4007 && strcmp (language_string, "GNU C++") == 0)
4009 warning ("-g option not supported for C++ on SVR4 systems");
4010 write_symbols = NO_DEBUG;
4012 #endif /* defined(DWARF_DEBUGGING_INFO) */
4014 #ifdef OVERRIDE_OPTIONS
4015 /* Some machines may reject certain combinations of options. */
4019 /* Unrolling all loops implies that standard loop unrolling must also
4021 if (flag_unroll_all_loops)
4022 flag_unroll_loops = 1;
4023 /* Loop unrolling requires that strength_reduction be on also. Silently
4024 turn on strength reduction here if it isn't already on. Also, the loop
4025 unrolling code assumes that cse will be run after loop, so that must
4026 be turned on also. */
4027 if (flag_unroll_loops)
4029 flag_strength_reduce = 1;
4030 flag_rerun_cse_after_loop = 1;
4033 /* Warn about options that are not supported on this machine. */
4034 #ifndef INSN_SCHEDULING
4035 if (flag_schedule_insns || flag_schedule_insns_after_reload)
4036 warning ("instruction scheduling not supported on this target machine");
4039 if (flag_delayed_branch)
4040 warning ("this target machine does not have delayed branches");
4043 /* If we are in verbose mode, write out the version and maybe all the
4044 option flags in use. */
4047 fprintf (stderr, "%s version %s", language_string, version_string);
4048 #ifdef TARGET_VERSION
4053 #define __VERSION__ "[unknown]"
4055 fprintf (stderr, " compiled by GNU C version %s.\n", __VERSION__);
4057 fprintf (stderr, " compiled by CC.\n");
4060 print_switch_values ();
4063 compile_file (filename);
4065 #if !defined(OS2) && !defined(VMS) && !defined(WINNT)
4071 char *lim = (char *) sbrk (0);
4073 fprintf (stderr, "Data size %d.\n",
4074 lim - (char *) &environ);
4078 system ("ps -l 1>&2");
4081 #endif /* not USG */
4083 #endif /* not OS2 and not VMS and not WINNT */
4086 exit (FATAL_EXIT_CODE);
4088 exit (FATAL_EXIT_CODE);
4089 exit (SUCCESS_EXIT_CODE);
4093 /* Decode -m switches. */
4095 /* Here is a table, controlled by the tm.h file, listing each -m switch
4096 and which bits in `target_switches' it should set or clear.
4097 If VALUE is positive, it is bits to set.
4098 If VALUE is negative, -VALUE is bits to clear.
4099 (The sign bit is not used so there is no confusion.) */
4101 struct {char *name; int value;} target_switches []
4104 /* This table is similar, but allows the switch to have a value. */
4106 #ifdef TARGET_OPTIONS
4107 struct {char *prefix; char ** variable;} target_options []
4111 /* Decode the switch -mNAME. */
4114 set_target_switch (name)
4120 for (j = 0; j < sizeof target_switches / sizeof target_switches[0]; j++)
4121 if (!strcmp (target_switches[j].name, name))
4123 if (target_switches[j].value < 0)
4124 target_flags &= ~-target_switches[j].value;
4126 target_flags |= target_switches[j].value;
4130 #ifdef TARGET_OPTIONS
4132 for (j = 0; j < sizeof target_options / sizeof target_options[0]; j++)
4134 int len = strlen (target_options[j].prefix);
4135 if (!strncmp (target_options[j].prefix, name, len))
4137 *target_options[j].variable = name + len;
4144 error ("Invalid option `%s'", name);
4147 /* Variable used for communication between the following two routines. */
4149 static int line_position;
4151 /* Print an option value and adjust the position in the line. */
4154 print_single_switch (type, name)
4157 fprintf (stderr, " %s%s", type, name);
4159 line_position += strlen (type) + strlen (name) + 1;
4161 if (line_position > 65)
4163 fprintf (stderr, "\n\t");
4168 /* Print default target switches for -version. */
4171 print_switch_values ()
4175 fprintf (stderr, "enabled:");
4178 for (j = 0; j < sizeof f_options / sizeof f_options[0]; j++)
4179 if (*f_options[j].variable == f_options[j].on_value)
4180 print_single_switch ("-f", f_options[j].string);
4182 for (j = 0; j < sizeof W_options / sizeof W_options[0]; j++)
4183 if (*W_options[j].variable == W_options[j].on_value)
4184 print_single_switch ("-W", W_options[j].string);
4186 for (j = 0; j < sizeof target_switches / sizeof target_switches[0]; j++)
4187 if (target_switches[j].name[0] != '\0'
4188 && target_switches[j].value > 0
4189 && ((target_switches[j].value & target_flags)
4190 == target_switches[j].value))
4191 print_single_switch ("-m", target_switches[j].name);
4193 fprintf (stderr, "\n");