1 /* Top level of GNU C compiler
2 Copyright (C) 1987, 88, 89, 92, 93, 1994 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. */
35 #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>
56 /* #include "c-tree.h" */
59 #include "insn-attr.h"
62 #ifdef XCOFF_DEBUGGING_INFO
70 /* The extra parameters substantially improve the I/O performance. */
72 VMS_fopen (fname
, type
)
76 if (strcmp (type
, "w") == 0)
77 return fopen (fname
, type
, "mbc=16", "deq=64", "fop=tef", "shr=nil");
78 return fopen (fname
, type
, "mbc=16");
80 #define fopen VMS_fopen
83 #ifndef DEFAULT_GDB_EXTENSIONS
84 #define DEFAULT_GDB_EXTENSIONS 1
87 extern int rtx_equal_function_value_matters
;
89 #if ! (defined (VMS) || defined (OS2))
90 extern char **environ
;
92 extern char *version_string
, *language_string
;
94 /* Carry information from ASM_DECLARE_OBJECT_NAME
95 to ASM_FINISH_DECLARE_OBJECT. */
97 extern int size_directive_output
;
98 extern tree last_assemble_variable_decl
;
100 extern void init_lex ();
101 extern void init_decl_processing ();
102 extern void init_obstacks ();
103 extern void init_tree_codes ();
104 extern void init_rtl ();
105 extern void init_regs ();
106 extern void init_optabs ();
107 extern void init_stmt ();
108 extern void init_reg_sets ();
109 extern void dump_flow_info ();
110 extern void dump_sched_info ();
111 extern void dump_local_alloc ();
113 void rest_of_decl_compilation ();
114 void error_with_file_and_line
PVPROTO((char *file
, int line
, char *s
, ...));
115 void error_with_decl
PVPROTO((tree decl
, char *s
, ...));
116 void error_for_asm
PVPROTO((rtx insn
, char *s
, ...));
117 void error
PVPROTO((char *s
, ...));
118 void fatal
PVPROTO((char *s
, ...));
119 void warning_with_file_and_line
PVPROTO((char *file
, int line
, char *s
, ...));
120 void warning_with_decl
PVPROTO((tree decl
, char *s
, ...));
121 void warning_for_asm
PVPROTO((rtx insn
, char *s
, ...));
122 void warning
PVPROTO((char *s
, ...));
123 void pedwarn
PVPROTO((char *s
, ...));
124 void pedwarn_with_decl
PVPROTO((tree decl
, char *s
, ...));
125 void pedwarn_with_file_and_line
PVPROTO((char *file
, int line
, char *s
, ...));
126 void sorry
PVPROTO((char *s
, ...));
127 void really_sorry
PVPROTO((char *s
, ...));
132 void set_target_switch ();
133 static void print_switch_values ();
134 static char *decl_name ();
136 /* Name of program invoked, sans directories. */
140 /* Copy of arguments to main. */
144 /* Name of current original source file (what was input to cpp).
145 This comes from each #-command in the actual input. */
147 char *input_filename
;
149 /* Name of top-level original source file (what was input to cpp).
150 This comes from the #-command at the beginning of the actual input.
151 If there isn't any there, then this is the cc1 input file name. */
153 char *main_input_filename
;
155 /* Stream for reading from the input file. */
159 /* Current line number in real source file. */
163 /* Stack of currently pending input files. */
165 struct file_stack
*input_file_stack
;
167 /* Incremented on each change to input_file_stack. */
168 int input_file_stack_tick
;
170 /* FUNCTION_DECL for function now being parsed or compiled. */
172 extern tree current_function_decl
;
174 /* Name to use as base of names for dump output files. */
176 char *dump_base_name
;
178 /* Bit flags that specify the machine subtype we are compiling for.
179 Bits are tested using macros TARGET_... defined in the tm.h file
180 and set by `-m...' switches. Must be defined in rtlanal.c. */
182 extern int target_flags
;
184 /* Flags saying which kinds of debugging dump have been requested. */
187 int rtl_dump_and_exit
= 0;
188 int jump_opt_dump
= 0;
193 int combine_dump
= 0;
195 int local_reg_dump
= 0;
196 int global_reg_dump
= 0;
198 int jump2_opt_dump
= 0;
199 int dbr_sched_dump
= 0;
200 int flag_print_asm_name
= 0;
201 int stack_reg_dump
= 0;
203 /* Name for output file of assembly code, specified with -o. */
207 /* Value of the -G xx switch, and whether it was passed or not. */
211 /* Type(s) of debugging information we are producing (if any).
212 See flags.h for the definitions of the different possible
213 types of debugging information. */
214 enum debug_info_type write_symbols
= NO_DEBUG
;
216 /* Level of debugging information we are producing. See flags.h
217 for the definitions of the different possible levels. */
218 enum debug_info_level debug_info_level
= DINFO_LEVEL_NONE
;
220 /* Nonzero means use GNU-only extensions in the generated symbolic
221 debugging information. */
222 /* Currently, this only has an effect when write_symbols is set to
223 DBX_DEBUG, XCOFF_DEBUG, or DWARF_DEBUG. */
224 int use_gnu_debug_info_extensions
= 0;
226 /* Nonzero means do optimizations. -O.
227 Particular numeric values stand for particular amounts of optimization;
228 thus, -O2 stores 2 here. However, the optimizations beyond the basic
229 ones are not controlled directly by this variable. Instead, they are
230 controlled by individual `flag_...' variables that are defaulted
231 based on this variable. */
235 /* Number of error messages and warning messages so far. */
238 int warningcount
= 0;
241 /* Flag to output bytecode instead of native assembler */
242 int output_bytecode
= 0;
244 /* Pointer to function to compute the name to use to print a declaration. */
246 char *(*decl_printable_name
) ();
248 /* Pointer to function to compute rtl for a language-specific tree code. */
250 struct rtx_def
*(*lang_expand_expr
) ();
252 /* Pointer to function to finish handling an incomplete decl at the
253 end of compilation. */
255 void (*incomplete_decl_finalize_hook
) () = 0;
257 /* Nonzero if generating code to do profiling. */
259 int profile_flag
= 0;
261 /* Nonzero if generating code to do profiling on a line-by-line basis. */
263 int profile_block_flag
;
265 /* Nonzero for -pedantic switch: warn about anything
266 that standard spec forbids. */
270 /* Temporarily suppress certain warnings.
271 This is set while reading code from a system header file. */
273 int in_system_header
= 0;
275 /* Nonzero means do stupid register allocation.
276 Currently, this is 1 if `optimize' is 0. */
278 int obey_regdecls
= 0;
280 /* Don't print functions as they are compiled and don't print
281 times taken by the various passes. -quiet. */
287 /* Nonzero means `char' should be signed. */
289 int flag_signed_char
;
291 /* Nonzero means give an enum type only as many bytes as it needs. */
293 int flag_short_enums
;
295 /* Nonzero for -fcaller-saves: allocate values in regs that need to
296 be saved across function calls, if that produces overall better code.
297 Optional now, so people can test it. */
299 #ifdef DEFAULT_CALLER_SAVES
300 int flag_caller_saves
= 1;
302 int flag_caller_saves
= 0;
305 /* Nonzero if structures and unions should be returned in memory.
307 This should only be defined if compatibility with another compiler or
308 with an ABI is needed, because it results in slower code. */
310 #ifndef DEFAULT_PCC_STRUCT_RETURN
311 #define DEFAULT_PCC_STRUCT_RETURN 1
314 /* Nonzero for -fpcc-struct-return: return values the same way PCC does. */
316 int flag_pcc_struct_return
= DEFAULT_PCC_STRUCT_RETURN
;
318 /* Nonzero for -fforce-mem: load memory value into a register
319 before arithmetic on it. This makes better cse but slower compilation. */
321 int flag_force_mem
= 0;
323 /* Nonzero for -fforce-addr: load memory address into a register before
324 reference to memory. This makes better cse but slower compilation. */
326 int flag_force_addr
= 0;
328 /* Nonzero for -fdefer-pop: don't pop args after each function call;
329 instead save them up to pop many calls' args with one insns. */
331 int flag_defer_pop
= 0;
333 /* Nonzero for -ffloat-store: don't allocate floats and doubles
334 in extended-precision registers. */
336 int flag_float_store
= 0;
338 /* Nonzero for -fcse-follow-jumps:
339 have cse follow jumps to do a more extensive job. */
341 int flag_cse_follow_jumps
;
343 /* Nonzero for -fcse-skip-blocks:
344 have cse follow a branch around a block. */
345 int flag_cse_skip_blocks
;
347 /* Nonzero for -fexpensive-optimizations:
348 perform miscellaneous relatively-expensive optimizations. */
349 int flag_expensive_optimizations
;
351 /* Nonzero for -fthread-jumps:
352 have jump optimize output of loop. */
354 int flag_thread_jumps
;
356 /* Nonzero enables strength-reduction in loop.c. */
358 int flag_strength_reduce
= 0;
360 /* Nonzero enables loop unrolling in unroll.c. Only loops for which the
361 number of iterations can be calculated at compile-time (UNROLL_COMPLETELY,
362 UNROLL_MODULO) or at run-time (preconditioned to be UNROLL_MODULO) are
365 int flag_unroll_loops
;
367 /* Nonzero enables loop unrolling in unroll.c. All loops are unrolled.
368 This is generally not a win. */
370 int flag_unroll_all_loops
;
372 /* Nonzero for -fwritable-strings:
373 store string constants in data segment and don't uniquize them. */
375 int flag_writable_strings
= 0;
377 /* Nonzero means don't put addresses of constant functions in registers.
378 Used for compiling the Unix kernel, where strange substitutions are
379 done on the assembly output. */
381 int flag_no_function_cse
= 0;
383 /* Nonzero for -fomit-frame-pointer:
384 don't make a frame pointer in simple functions that don't require one. */
386 int flag_omit_frame_pointer
= 0;
388 /* Nonzero to inhibit use of define_optimization peephole opts. */
390 int flag_no_peephole
= 0;
392 /* Nonzero allows GCC to violate some IEEE or ANSI rules regarding math
393 operations in the interest of optimization. For example it allows
394 GCC to assume arguments to sqrt are nonnegative numbers, allowing
395 faster code for sqrt to be generated. */
397 int flag_fast_math
= 0;
399 /* Nonzero means all references through pointers are volatile. */
403 /* Nonzero means treat all global and extern variables as global. */
405 int flag_volatile_global
;
407 /* Nonzero means just do syntax checking; don't output anything. */
409 int flag_syntax_only
= 0;
411 /* Nonzero means to rerun cse after loop optimization. This increases
412 compilation time about 20% and picks up a few more common expressions. */
414 static int flag_rerun_cse_after_loop
;
416 /* Nonzero for -finline-functions: ok to inline functions that look like
417 good inline candidates. */
419 int flag_inline_functions
;
421 /* Nonzero for -fkeep-inline-functions: even if we make a function
422 go inline everywhere, keep its definition around for debugging
425 int flag_keep_inline_functions
;
427 /* Nonzero means that functions declared `inline' will be treated
428 as `static'. Prevents generation of zillions of copies of unused
429 static inline functions; instead, `inlines' are written out
430 only when actually used. Used in conjunction with -g. Also
431 does the right thing with #pragma interface. */
435 /* Nonzero means we should be saving declaration info into a .X file. */
437 int flag_gen_aux_info
= 0;
439 /* Specified name of aux-info file. */
441 static char *aux_info_file_name
;
443 /* Nonzero means make the text shared if supported. */
445 int flag_shared_data
;
447 /* Nonzero means schedule into delayed branch slots if supported. */
449 int flag_delayed_branch
;
451 /* Nonzero means to run cleanups after CALL_EXPRs. */
453 int flag_short_temps
;
455 /* Nonzero if we are compiling pure (sharable) code.
456 Value is 1 if we are doing reasonable (i.e. simple
457 offset into offset table) pic. Value is 2 if we can
458 only perform register offsets. */
462 /* Nonzero means place uninitialized global data in the bss section. */
466 /* Nonzero means pretend it is OK to examine bits of target floats,
467 even if that isn't true. The resulting code will have incorrect constants,
468 but the same series of instructions that the native compiler would make. */
470 int flag_pretend_float
;
472 /* Nonzero means change certain warnings into errors.
473 Usually these are warnings about failure to conform to some standard. */
475 int flag_pedantic_errors
= 0;
477 /* flag_schedule_insns means schedule insns within basic blocks (before
479 flag_schedule_insns_after_reload means schedule insns after
482 int flag_schedule_insns
= 0;
483 int flag_schedule_insns_after_reload
= 0;
485 /* -finhibit-size-directive inhibits output of .size for ELF.
486 This is used only for compiling crtstuff.c,
487 and it may be extended to other effects
488 needed for crtstuff.c on other systems. */
489 int flag_inhibit_size_directive
= 0;
491 /* -fverbose-asm causes extra commentary information to be produced in
492 the generated assembly code (to make it more readable). This option
493 is generally only of use to those who actually need to read the
494 generated assembly code (perhaps while debugging the compiler itself). */
496 int flag_verbose_asm
= 0;
498 /* -fgnu-linker specifies use of the GNU linker for initializations.
499 (Or, more generally, a linker that handles initializations.)
500 -fno-gnu-linker says that collect2 will be used. */
502 int flag_gnu_linker
= 0;
504 int flag_gnu_linker
= 1;
507 /* Table of language-independent -f options.
508 STRING is the option name. VARIABLE is the address of the variable.
509 ON_VALUE is the value to store in VARIABLE
510 if `-fSTRING' is seen as an option.
511 (If `-fno-STRING' is seen as an option, the opposite value is stored.) */
513 struct { char *string
; int *variable
; int on_value
;} f_options
[] =
515 {"float-store", &flag_float_store
, 1},
516 {"volatile", &flag_volatile
, 1},
517 {"volatile-global", &flag_volatile_global
, 1},
518 {"defer-pop", &flag_defer_pop
, 1},
519 {"omit-frame-pointer", &flag_omit_frame_pointer
, 1},
520 {"cse-follow-jumps", &flag_cse_follow_jumps
, 1},
521 {"cse-skip-blocks", &flag_cse_skip_blocks
, 1},
522 {"expensive-optimizations", &flag_expensive_optimizations
, 1},
523 {"thread-jumps", &flag_thread_jumps
, 1},
524 {"strength-reduce", &flag_strength_reduce
, 1},
525 {"unroll-loops", &flag_unroll_loops
, 1},
526 {"unroll-all-loops", &flag_unroll_all_loops
, 1},
527 {"writable-strings", &flag_writable_strings
, 1},
528 {"peephole", &flag_no_peephole
, 0},
529 {"force-mem", &flag_force_mem
, 1},
530 {"force-addr", &flag_force_addr
, 1},
531 {"function-cse", &flag_no_function_cse
, 0},
532 {"inline-functions", &flag_inline_functions
, 1},
533 {"keep-inline-functions", &flag_keep_inline_functions
, 1},
534 {"inline", &flag_no_inline
, 0},
535 {"syntax-only", &flag_syntax_only
, 1},
536 {"shared-data", &flag_shared_data
, 1},
537 {"caller-saves", &flag_caller_saves
, 1},
538 {"pcc-struct-return", &flag_pcc_struct_return
, 1},
539 {"reg-struct-return", &flag_pcc_struct_return
, 0},
540 {"delayed-branch", &flag_delayed_branch
, 1},
541 {"rerun-cse-after-loop", &flag_rerun_cse_after_loop
, 1},
542 {"pretend-float", &flag_pretend_float
, 1},
543 {"schedule-insns", &flag_schedule_insns
, 1},
544 {"schedule-insns2", &flag_schedule_insns_after_reload
, 1},
545 {"pic", &flag_pic
, 1},
546 {"PIC", &flag_pic
, 2},
547 {"fast-math", &flag_fast_math
, 1},
548 {"common", &flag_no_common
, 0},
549 {"inhibit-size-directive", &flag_inhibit_size_directive
, 1},
550 {"verbose-asm", &flag_verbose_asm
, 1},
551 {"gnu-linker", &flag_gnu_linker
, 1},
552 {"bytecode", &output_bytecode
, 1}
555 /* Table of language-specific options. */
557 char *lang_options
[] =
560 "-fallow-single-precision",
562 "-fsigned-bitfields",
563 "-funsigned-bitfields",
564 "-fno-signed-bitfields",
565 "-fno-unsigned-bitfields",
569 "-fno-unsigned-char",
581 "-fno-cond-mismatch",
582 "-fdollars-in-identifiers",
583 "-fno-dollars-in-identifiers",
592 "-Wbad-function-cast",
593 "-Wno-bad-function-cast",
597 "-Wno-char-subscripts",
611 "-Wno-missing-braces",
612 "-Wmissing-declarations",
613 "-Wno-missing-declarations",
614 "-Wmissing-prototypes",
615 "-Wno-missing-prototypes",
617 "-Wno-nested-externs",
621 "-Wno-pointer-arith",
623 "-Wno-redundant-decls",
624 "-Wstrict-prototypes",
625 "-Wno-strict-prototypes",
631 "-Wno-write-strings",
633 /* These are for C++. */
634 "-+e0", /* gcc.c tacks the `-' on the front. */
639 "-falt-external-templates",
640 "-fno-alt-external-templates",
641 "-fansi-overloading",
642 "-fno-ansi-overloading",
646 "-fno-conserve-space",
648 "-fno-default-inline",
651 "-felide-constructors",
652 "-fno-elide-constructors",
654 "-fno-enum-int-equiv",
655 "-fexternal-templates",
656 "-fno-external-templates",
659 "-fhandle-exceptions",
660 "-fno-handle-exceptions",
661 "-fhandle-signatures",
662 "-fno-handle-signatures",
665 "-fimplement-inlines",
666 "-fno-implement-inlines",
667 "-fimplicit-templates",
668 "-fno-implicit-templates",
672 "-fno-memoize-lookups",
674 "-fno-nonnull-objects",
676 "-fno-save-memoized",
681 "-fstrict-prototype",
682 "-fno-strict-prototype",
683 "-fthis-is-variable",
684 "-fno-this-is-variable",
686 "-fno-vtable-thunks",
692 "-Woverloaded-virtual",
693 "-Wno-overloaded-virtual",
696 "-Wtemplate-debugging",
697 "-Wno-template-debugging",
698 "-Wctor-dtor-privacy",
699 "-Wno-ctor-dtor-privacy",
700 "-Wnon-virtual-dtor",
701 "-Wno-non-virtual-dtor",
703 "-Wno-extern-inline",
705 /* these are for obj c */
717 /* This is for GNAT and is temporary. */
722 /* Options controlling warnings */
724 /* Don't print warning messages. -w. */
726 int inhibit_warnings
= 0;
728 /* Print various extra warnings. -W. */
730 int extra_warnings
= 0;
732 /* Treat warnings as errors. -Werror. */
734 int warnings_are_errors
= 0;
736 /* Nonzero to warn about unused local variables. */
740 /* Nonzero to warn about variables used before they are initialized. */
742 int warn_uninitialized
;
744 /* Nonzero means warn about all declarations which shadow others. */
748 /* Warn if a switch on an enum fails to have a case for every enum value. */
752 /* Nonzero means warn about function definitions that default the return type
753 or that use a null return and have a return-type other than void. */
755 int warn_return_type
;
757 /* Nonzero means warn about pointer casts that increase the required
758 alignment of the target type (and might therefore lead to a crash
759 due to a misaligned access). */
763 /* Nonzero means warn about any identifiers that match in the first N
764 characters. The value N is in `id_clash_len'. */
767 unsigned id_clash_len
;
769 /* Nonzero means warn about any objects definitions whose size is larger
770 than N bytes. Also want about function definitions whose returned
771 values are larger than N bytes. The value N is in `larger_than_size'. */
773 int warn_larger_than
;
774 unsigned larger_than_size
;
776 /* Nonzero means warn if inline function is too large. */
780 /* Warn if a function returns an aggregate,
781 since there are often incompatible calling conventions for doing this. */
783 int warn_aggregate_return
;
785 /* Likewise for -W. */
787 struct { char *string
; int *variable
; int on_value
;} W_options
[] =
789 {"unused", &warn_unused
, 1},
790 {"error", &warnings_are_errors
, 1},
791 {"shadow", &warn_shadow
, 1},
792 {"switch", &warn_switch
, 1},
793 {"aggregate-return", &warn_aggregate_return
, 1},
794 {"cast-align", &warn_cast_align
, 1},
795 {"uninitialized", &warn_uninitialized
, 1},
796 {"inline", &warn_inline
, 1}
799 /* Output files for assembler code (real compiler output)
800 and debugging dumps. */
805 FILE *jump_opt_dump_file
;
807 FILE *loop_dump_file
;
808 FILE *cse2_dump_file
;
809 FILE *flow_dump_file
;
810 FILE *combine_dump_file
;
811 FILE *sched_dump_file
;
812 FILE *local_reg_dump_file
;
813 FILE *global_reg_dump_file
;
814 FILE *sched2_dump_file
;
815 FILE *jump2_opt_dump_file
;
816 FILE *dbr_sched_dump_file
;
817 FILE *stack_reg_dump_file
;
819 /* Time accumulators, to count the total time spent in various passes. */
823 int integration_time
;
831 int local_alloc_time
;
832 int global_alloc_time
;
835 int shorten_branch_time
;
841 /* Return time used so far, in microseconds. */
850 struct rusage rusage
;
855 int proc_system_time
;
857 int child_system_time
;
867 return (tms
.tms_utime
+ tms
.tms_stime
) * (1000000 / HZ
);
870 getrusage (0, &rusage
);
871 return (rusage
.ru_utime
.tv_sec
* 1000000 + rusage
.ru_utime
.tv_usec
872 + rusage
.ru_stime
.tv_sec
* 1000000 + rusage
.ru_stime
.tv_usec
);
875 return (vms_times
.proc_user_time
+ vms_times
.proc_system_time
) * 10000;
880 #define TIMEVAR(VAR, BODY) \
881 do { int otime = get_run_time (); BODY; VAR += get_run_time () - otime; } while (0)
884 print_time (str
, total
)
889 "time in %s: %d.%06d\n",
890 str
, total
/ 1000000, total
% 1000000);
893 /* Count an error or warning. Return 1 if the message should be printed. */
896 count_error (warningp
)
899 if (warningp
&& inhibit_warnings
)
902 if (warningp
&& !warnings_are_errors
)
906 static int warning_message
= 0;
908 if (warningp
&& !warning_message
)
910 fprintf (stderr
, "%s: warnings being treated as errors\n", progname
);
919 /* Print a fatal error message. NAME is the text.
920 Also include a system error message based on `errno'. */
923 pfatal_with_name (name
)
926 fprintf (stderr
, "%s: ", progname
);
932 fatal_io_error (name
)
935 fprintf (stderr
, "%s: %s: I/O error\n", progname
, name
);
939 /* Called to give a better error message when we don't have an insn to match
940 what we are looking for or if the insn's constraints aren't satisfied,
941 rather than just calling abort(). */
944 fatal_insn_not_found (insn
)
947 if (!output_bytecode
)
949 if (INSN_CODE (insn
) < 0)
950 error ("internal error--unrecognizable insn:");
952 error ("internal error--insn does not satisfy its constraints:");
956 fflush (asm_out_file
);
958 fflush (aux_info_file
);
960 fflush (rtl_dump_file
);
961 if (jump_opt_dump_file
)
962 fflush (jump_opt_dump_file
);
964 fflush (cse_dump_file
);
966 fflush (loop_dump_file
);
968 fflush (cse2_dump_file
);
970 fflush (flow_dump_file
);
971 if (combine_dump_file
)
972 fflush (combine_dump_file
);
974 fflush (sched_dump_file
);
975 if (local_reg_dump_file
)
976 fflush (local_reg_dump_file
);
977 if (global_reg_dump_file
)
978 fflush (global_reg_dump_file
);
979 if (sched2_dump_file
)
980 fflush (sched2_dump_file
);
981 if (jump2_opt_dump_file
)
982 fflush (jump2_opt_dump_file
);
983 if (dbr_sched_dump_file
)
984 fflush (dbr_sched_dump_file
);
985 if (stack_reg_dump_file
)
986 fflush (stack_reg_dump_file
);
990 /* This is the default decl_printable_name function. */
993 decl_name (decl
, kind
)
997 return IDENTIFIER_POINTER (DECL_NAME (decl
));
1000 static int need_error_newline
;
1002 /* Function of last error message;
1003 more generally, function such that if next error message is in it
1004 then we don't have to mention the function name. */
1005 static tree last_error_function
= NULL
;
1007 /* Used to detect when input_file_stack has changed since last described. */
1008 static int last_error_tick
;
1010 /* Called when the start of a function definition is parsed,
1011 this function prints on stderr the name of the function. */
1014 announce_function (decl
)
1020 if (rtl_dump_and_exit
)
1021 fprintf (stderr
, "%s ", IDENTIFIER_POINTER (DECL_NAME (decl
)));
1023 fprintf (stderr
, " %s", (*decl_printable_name
) (decl
, &junk
));
1025 need_error_newline
= 1;
1026 last_error_function
= current_function_decl
;
1030 /* Prints out, if necessary, the name of the current function
1031 which caused an error. Called from all error and warning functions. */
1034 report_error_function (file
)
1037 struct file_stack
*p
;
1039 if (need_error_newline
)
1041 fprintf (stderr
, "\n");
1042 need_error_newline
= 0;
1045 if (last_error_function
!= current_function_decl
)
1047 char *kind
= "function";
1048 if (current_function_decl
!= 0
1049 && TREE_CODE (TREE_TYPE (current_function_decl
)) == METHOD_TYPE
)
1053 fprintf (stderr
, "%s: ", file
);
1055 if (current_function_decl
== NULL
)
1056 fprintf (stderr
, "At top level:\n");
1059 char *name
= (*decl_printable_name
) (current_function_decl
, &kind
);
1060 fprintf (stderr
, "In %s `%s':\n", kind
, name
);
1063 last_error_function
= current_function_decl
;
1065 if (input_file_stack
&& input_file_stack
->next
!= 0
1066 && input_file_stack_tick
!= last_error_tick
)
1068 fprintf (stderr
, "In file included");
1069 for (p
= input_file_stack
->next
; p
; p
= p
->next
)
1071 fprintf (stderr
, " from %s:%d", p
->name
, p
->line
);
1073 fprintf (stderr
, ",\n ");
1075 fprintf (stderr
, ":\n");
1076 last_error_tick
= input_file_stack_tick
;
1080 /* Print a message. */
1083 vmessage (prefix
, s
, ap
)
1089 fprintf (stderr
, "%s: ", prefix
);
1092 vfprintf (stderr
, s
, ap
);
1095 HOST_WIDE_INT v1
= va_arg(ap
, HOST_WIDE_INT
);
1096 HOST_WIDE_INT v2
= va_arg(ap
, HOST_WIDE_INT
);
1097 HOST_WIDE_INT v3
= va_arg(ap
, HOST_WIDE_INT
);
1098 fprintf (stderr
, s
, v1
, v2
, v3
);
1103 /* Print a message relevant to line LINE of file FILE. */
1106 v_message_with_file_and_line (file
, line
, prefix
, s
, ap
)
1114 fprintf (stderr
, "%s:%d: ", file
, line
);
1116 fprintf (stderr
, "%s: ", progname
);
1118 vmessage (prefix
, s
, ap
);
1119 fputc ('\n', stderr
);
1122 /* Print a message relevant to the given DECL. */
1125 v_message_with_decl (decl
, prefix
, s
, ap
)
1133 fprintf (stderr
, "%s:%d: ",
1134 DECL_SOURCE_FILE (decl
), DECL_SOURCE_LINE (decl
));
1137 fprintf (stderr
, "%s: ", prefix
);
1139 /* Do magic to get around lack of varargs support for insertion
1140 of arguments into existing list. We know that the decl is first;
1141 we ass_u_me that it will be printed with "%s". */
1143 for (p
= s
; *p
; ++p
)
1147 if (*(p
+ 1) == '%')
1154 if (p
> s
) /* Print the left-hand substring. */
1156 char fmt
[sizeof "%.255s"];
1159 if (width
> 255L) width
= 255L; /* arbitrary */
1160 sprintf (fmt
, "%%.%lds", width
);
1161 fprintf (stderr
, fmt
, s
);
1164 if (*p
== '%') /* Print the name. */
1166 char *n
= (DECL_NAME (decl
)
1167 ? (*decl_printable_name
) (decl
, &junk
)
1173 if (isalpha (*(p
- 1) & 0xFF))
1178 if (*p
) /* Print the rest of the message. */
1179 vmessage ((char *)NULL
, p
, ap
);
1181 fputc ('\n', stderr
);
1184 /* Figure file and line of the given INSN. */
1187 file_and_line_for_asm (insn
, pfile
, pline
)
1192 rtx body
= PATTERN (insn
);
1195 /* Find the (or one of the) ASM_OPERANDS in the insn. */
1196 if (GET_CODE (body
) == SET
&& GET_CODE (SET_SRC (body
)) == ASM_OPERANDS
)
1197 asmop
= SET_SRC (body
);
1198 else if (GET_CODE (body
) == ASM_OPERANDS
)
1200 else if (GET_CODE (body
) == PARALLEL
1201 && GET_CODE (XVECEXP (body
, 0, 0)) == SET
)
1202 asmop
= SET_SRC (XVECEXP (body
, 0, 0));
1203 else if (GET_CODE (body
) == PARALLEL
1204 && GET_CODE (XVECEXP (body
, 0, 0)) == ASM_OPERANDS
)
1205 asmop
= XVECEXP (body
, 0, 0);
1211 *pfile
= ASM_OPERANDS_SOURCE_FILE (asmop
);
1212 *pline
= ASM_OPERANDS_SOURCE_LINE (asmop
);
1216 *pfile
= input_filename
;
1221 /* Report an error at line LINE of file FILE. */
1224 v_error_with_file_and_line (file
, line
, s
, ap
)
1231 report_error_function (file
);
1232 v_message_with_file_and_line (file
, line
, (char *)NULL
, s
, ap
);
1236 error_with_file_and_line
VPROTO((char *file
, int line
, char *s
, ...))
1248 file
= va_arg (ap
, char *);
1249 line
= va_arg (ap
, int);
1250 s
= va_arg (ap
, char *);
1253 v_error_with_file_and_line (file
, line
, s
, ap
);
1257 /* Report an error at the declaration DECL.
1258 S is a format string which uses %s to substitute the declaration
1259 name; subsequent substitutions are a la printf. */
1262 v_error_with_decl (decl
, s
, ap
)
1268 report_error_function (DECL_SOURCE_FILE (decl
));
1269 v_message_with_decl (decl
, (char *)NULL
, s
, ap
);
1273 error_with_decl
VPROTO((tree decl
, char *s
, ...))
1284 decl
= va_arg (ap
, tree
);
1285 s
= va_arg (ap
, char *);
1288 v_error_with_decl (decl
, s
, ap
);
1292 /* Report an error at the line number of the insn INSN.
1293 This is used only when INSN is an `asm' with operands,
1294 and each ASM_OPERANDS records its own source file and line. */
1297 v_error_for_asm (insn
, s
, ap
)
1306 file_and_line_for_asm (insn
, &file
, &line
);
1307 report_error_function (file
);
1308 v_message_with_file_and_line (file
, line
, (char *)NULL
, s
, ap
);
1312 error_for_asm
VPROTO((rtx insn
, char *s
, ...))
1323 insn
= va_arg (ap
, rtx
);
1324 s
= va_arg (ap
, char *);
1327 v_error_for_asm (insn
, s
, ap
);
1331 /* Report an error at the current line number. */
1338 v_error_with_file_and_line (input_filename
, lineno
, s
, ap
);
1342 error
VPROTO((char *s
, ...))
1352 s
= va_arg (ap
, char *);
1359 /* Report a fatal error at the current line number. */
1371 fatal
VPROTO((char *s
, ...))
1381 s
= va_arg (ap
, char *);
1388 /* Report a warning at line LINE of file FILE. */
1391 v_warning_with_file_and_line (file
, line
, s
, ap
)
1397 if (count_error (1))
1399 report_error_function (file
);
1400 v_message_with_file_and_line (file
, line
, "warning", s
, ap
);
1405 warning_with_file_and_line
VPROTO((char *file
, int line
, char *s
, ...))
1417 file
= va_arg (ap
, char *);
1418 line
= va_arg (ap
, int);
1419 s
= va_arg (ap
, char *);
1422 v_warning_with_file_and_line (file
, line
, s
, ap
);
1426 /* Report a warning at the declaration DECL.
1427 S is a format string which uses %s to substitute the declaration
1428 name; subsequent substitutions are a la printf. */
1431 v_warning_with_decl (decl
, s
, ap
)
1436 if (count_error (1))
1438 report_error_function (DECL_SOURCE_FILE (decl
));
1439 v_message_with_decl (decl
, "warning", s
, ap
);
1444 warning_with_decl
VPROTO((tree decl
, char *s
, ...))
1455 decl
= va_arg (ap
, tree
);
1456 s
= va_arg (ap
, char *);
1459 v_warning_with_decl (decl
, s
, ap
);
1463 /* Report a warning at the line number of the insn INSN.
1464 This is used only when INSN is an `asm' with operands,
1465 and each ASM_OPERANDS records its own source file and line. */
1468 v_warning_for_asm (insn
, s
, ap
)
1473 if (count_error (1))
1478 file_and_line_for_asm (insn
, &file
, &line
);
1479 report_error_function (file
);
1480 v_message_with_file_and_line (file
, line
, "warning", s
, ap
);
1485 warning_for_asm
VPROTO((rtx insn
, char *s
, ...))
1496 insn
= va_arg (ap
, rtx
);
1497 s
= va_arg (ap
, char *);
1500 v_warning_for_asm (insn
, s
, ap
);
1504 /* Report a warning at the current line number. */
1511 v_warning_with_file_and_line (input_filename
, lineno
, s
, ap
);
1515 warning
VPROTO((char *s
, ...))
1525 s
= va_arg (ap
, char *);
1532 /* These functions issue either warnings or errors depending on
1533 -pedantic-errors. */
1540 if (flag_pedantic_errors
)
1547 pedwarn
VPROTO((char *s
, ...))
1557 s
= va_arg (ap
, char *);
1565 v_pedwarn_with_decl (decl
, s
, ap
)
1570 /* We don't want -pedantic-errors to cause the compilation to fail from
1571 "errors" in system header files. Sometimes fixincludes can't fix what's
1572 broken (eg: unsigned char bitfields - fixing it may change the alignment
1573 which will cause programs to mysteriously fail because the C library
1574 or kernel uses the original layout). There's no point in issuing a
1575 warning either, it's just unnecessary noise. */
1577 if (! DECL_IN_SYSTEM_HEADER (decl
))
1579 if (flag_pedantic_errors
)
1580 v_error_with_decl (decl
, s
, ap
);
1582 v_warning_with_decl (decl
, s
, ap
);
1587 pedwarn_with_decl
VPROTO((tree decl
, char *s
, ...))
1598 decl
= va_arg (ap
, tree
);
1599 s
= va_arg (ap
, char *);
1602 v_pedwarn_with_decl (decl
, s
, ap
);
1607 v_pedwarn_with_file_and_line (file
, line
, s
, ap
)
1613 if (flag_pedantic_errors
)
1614 v_error_with_file_and_line (file
, line
, s
, ap
);
1616 v_warning_with_file_and_line (file
, line
, s
, ap
);
1620 pedwarn_with_file_and_line
VPROTO((char *file
, int line
, char *s
, ...))
1632 file
= va_arg (ap
, char *);
1633 line
= va_arg (ap
, int);
1634 s
= va_arg (ap
, char *);
1637 v_pedwarn_with_file_and_line (file
, line
, s
, ap
);
1641 /* Apologize for not implementing some feature. */
1650 fprintf (stderr
, "%s:%d: ", input_filename
, lineno
);
1652 fprintf (stderr
, "%s: ", progname
);
1653 vmessage ("sorry, not implemented", s
, ap
);
1654 fputc ('\n', stderr
);
1658 sorry
VPROTO((char *s
, ...))
1668 s
= va_arg (ap
, char *);
1675 /* Apologize for not implementing some feature, then quit. */
1678 v_really_sorry (s
, ap
)
1684 fprintf (stderr
, "%s:%d: ", input_filename
, lineno
);
1686 fprintf (stderr
, "%s: ", progname
);
1687 vmessage ("sorry, not implemented", s
, ap
);
1688 fatal (" (fatal)\n");
1692 really_sorry
VPROTO((char *s
, ...))
1702 s
= va_arg (ap
, char *);
1705 v_really_sorry (s
, ap
);
1709 /* More 'friendly' abort that prints the line and file.
1710 config.h can #define abort fancy_abort if you like that sort of thing.
1712 I don't think this is actually a good idea.
1713 Other sorts of crashes will look a certain way.
1714 It is a good thing if crashes from calling abort look the same way.
1720 fatal ("internal gcc abort");
1723 /* This calls abort and is used to avoid problems when abort if a macro.
1724 It is used when we need to pass the address of abort. */
1732 /* When `malloc.c' is compiled with `rcheck' defined,
1733 it calls this function to report clobberage. */
1741 /* Same as `malloc' but report error if no memory available. */
1747 register char *value
= (char *) malloc (size
);
1749 fatal ("virtual memory exhausted");
1753 /* Same as `realloc' but report error if no memory available. */
1756 xrealloc (ptr
, size
)
1760 char *result
= (char *) realloc (ptr
, size
);
1762 fatal ("virtual memory exhausted");
1766 /* Return the logarithm of X, base 2, considering X unsigned,
1767 if X is a power of 2. Otherwise, returns -1.
1769 This should be used via the `exact_log2' macro. */
1773 register unsigned HOST_WIDE_INT x
;
1775 register int log
= 0;
1776 /* Test for 0 or a power of 2. */
1777 if (x
== 0 || x
!= (x
& -x
))
1779 while ((x
>>= 1) != 0)
1784 /* Given X, an unsigned number, return the largest int Y such that 2**Y <= X.
1785 If X is 0, return -1.
1787 This should be used via the floor_log2 macro. */
1791 register unsigned HOST_WIDE_INT x
;
1793 register int log
= -1;
1801 jmp_buf float_handler
;
1803 /* Specify where to longjmp to when a floating arithmetic error happens.
1804 If HANDLER is 0, it means don't handle the errors any more. */
1807 set_float_handler (handler
)
1810 float_handled
= (handler
!= 0);
1812 bcopy ((char *) handler
, (char *) float_handler
, sizeof (float_handler
));
1815 /* Specify, in HANDLER, where to longjmp to when a floating arithmetic
1816 error happens, pushing the previous specification into OLD_HANDLER.
1817 Return an indication of whether there was a previous handler in effect. */
1820 push_float_handler (handler
, old_handler
)
1821 jmp_buf handler
, old_handler
;
1823 int was_handled
= float_handled
;
1827 bcopy ((char *) float_handler
, (char *) old_handler
,
1828 sizeof (float_handler
));
1830 bcopy ((char *) handler
, (char *) float_handler
, sizeof (float_handler
));
1834 /* Restore the previous specification of whether and where to longjmp to
1835 when a floating arithmetic error happens. */
1838 pop_float_handler (handled
, handler
)
1842 float_handled
= handled
;
1844 bcopy ((char *) handler
, (char *) float_handler
, sizeof (float_handler
));
1847 /* Signals actually come here. */
1850 float_signal (signo
)
1851 /* If this is missing, some compilers complain. */
1854 if (float_handled
== 0)
1856 #if defined (USG) || defined (hpux)
1857 signal (SIGFPE
, float_signal
); /* re-enable the signal catcher */
1860 signal (SIGFPE
, float_signal
);
1861 longjmp (float_handler
, 1);
1864 /* Handler for SIGPIPE. */
1868 /* If this is missing, some compilers complain. */
1871 fatal ("output pipe has been closed");
1874 /* Strip off a legitimate source ending from the input string NAME of
1878 strip_off_ending (name
, len
)
1882 if (len
> 2 && ! strcmp (".c", name
+ len
- 2))
1884 else if (len
> 2 && ! strcmp (".m", name
+ len
- 2))
1886 else if (len
> 2 && ! strcmp (".i", name
+ len
- 2))
1888 else if (len
> 3 && ! strcmp (".ii", name
+ len
- 3))
1890 else if (len
> 3 && ! strcmp (".co", name
+ len
- 3))
1892 else if (len
> 3 && ! strcmp (".cc", name
+ len
- 3))
1894 else if (len
> 2 && ! strcmp (".C", name
+ len
- 2))
1896 else if (len
> 4 && ! strcmp (".cxx", name
+ len
- 4))
1898 else if (len
> 4 && ! strcmp (".cpp", name
+ len
- 4))
1900 else if (len
> 2 && ! strcmp (".f", name
+ len
- 2))
1902 /* Ada will use extensions like .ada, .adb, and .ads, so just test
1904 else if (len
> 4 && ! strncmp (".ad", name
+ len
- 4, 3))
1906 else if (len
> 4 && ! strcmp (".atr", name
+ len
- 4))
1910 /* Output a quoted string. */
1912 output_quoted_string (asm_file
, string
)
1918 putc ('\"', asm_file
);
1919 while ((c
= *string
++) != 0)
1921 if (c
== '\"' || c
== '\\')
1922 putc ('\\', asm_file
);
1925 putc ('\"', asm_file
);
1928 /* Output a file name in the form wanted by System V. */
1931 output_file_directive (asm_file
, input_name
)
1935 int len
= strlen (input_name
);
1936 char *na
= input_name
+ len
;
1938 /* NA gets INPUT_NAME sans directory names. */
1939 while (na
> input_name
)
1946 #ifdef ASM_OUTPUT_MAIN_SOURCE_FILENAME
1947 ASM_OUTPUT_MAIN_SOURCE_FILENAME (asm_file
, na
);
1949 #ifdef ASM_OUTPUT_SOURCE_FILENAME
1950 ASM_OUTPUT_SOURCE_FILENAME (asm_file
, na
);
1952 fprintf (asm_file
, "\t.file\t");
1953 output_quoted_string (asm_file
, na
);
1954 fputc ('\n', asm_file
);
1959 /* Routine to build language identifier for object file. */
1961 output_lang_identify (asm_out_file
)
1964 int len
= strlen (lang_identify ()) + sizeof ("__gnu_compiled_") + 1;
1965 char *s
= (char *) alloca (len
);
1966 sprintf (s
, "__gnu_compiled_%s", lang_identify ());
1967 ASM_OUTPUT_LABEL (asm_out_file
, s
);
1970 /* Routine to open a dump file. */
1972 open_dump_file (base_name
, suffix
)
1977 char *dumpname
= (char *) alloca (strlen (base_name
) + strlen (suffix
) + 1);
1979 strcpy (dumpname
, base_name
);
1980 strcat (dumpname
, suffix
);
1981 f
= fopen (dumpname
, "w");
1983 pfatal_with_name (dumpname
);
1987 /* Compile an entire file of output from cpp, named NAME.
1988 Write a file of assembly output and various debugging dumps. */
1997 int name_specified
= name
!= 0;
1999 if (dump_base_name
== 0)
2000 dump_base_name
= name
? name
: "gccdump";
2004 integration_time
= 0;
2012 local_alloc_time
= 0;
2013 global_alloc_time
= 0;
2016 shorten_branch_time
= 0;
2022 /* Open input file. */
2024 if (name
== 0 || !strcmp (name
, "-"))
2030 finput
= fopen (name
, "r");
2032 pfatal_with_name (name
);
2034 #ifdef IO_BUFFER_SIZE
2035 setvbuf (finput
, (char *) xmalloc (IO_BUFFER_SIZE
), _IOFBF
, IO_BUFFER_SIZE
);
2038 /* Initialize data in various passes. */
2043 /* Some of these really don't need to be called when generating bytecode,
2044 but the options would have to be parsed first to know that. -bson */
2046 init_emit_once (debug_info_level
== DINFO_LEVEL_NORMAL
2047 || debug_info_level
== DINFO_LEVEL_VERBOSE
);
2049 init_decl_processing ();
2057 if (flag_caller_saves
)
2058 init_caller_save ();
2060 /* If auxiliary info generation is desired, open the output file.
2061 This goes in the same directory as the source file--unlike
2062 all the other output files. */
2063 if (flag_gen_aux_info
)
2065 aux_info_file
= fopen (aux_info_file_name
, "w");
2066 if (aux_info_file
== 0)
2067 pfatal_with_name (aux_info_file_name
);
2070 /* If rtl dump desired, open the output file. */
2072 rtl_dump_file
= open_dump_file (dump_base_name
, ".rtl");
2074 /* If jump_opt dump desired, open the output file. */
2076 jump_opt_dump_file
= open_dump_file (dump_base_name
, ".jump");
2078 /* If cse dump desired, open the output file. */
2080 cse_dump_file
= open_dump_file (dump_base_name
, ".cse");
2082 /* If loop dump desired, open the output file. */
2084 loop_dump_file
= open_dump_file (dump_base_name
, ".loop");
2086 /* If cse2 dump desired, open the output file. */
2088 cse2_dump_file
= open_dump_file (dump_base_name
, ".cse2");
2090 /* If flow dump desired, open the output file. */
2092 flow_dump_file
= open_dump_file (dump_base_name
, ".flow");
2094 /* If combine dump desired, open the output file. */
2096 combine_dump_file
= open_dump_file (dump_base_name
, ".combine");
2098 /* If scheduling dump desired, open the output file. */
2100 sched_dump_file
= open_dump_file (dump_base_name
, ".sched");
2102 /* If local_reg dump desired, open the output file. */
2104 local_reg_dump_file
= open_dump_file (dump_base_name
, ".lreg");
2106 /* If global_reg dump desired, open the output file. */
2107 if (global_reg_dump
)
2108 global_reg_dump_file
= open_dump_file (dump_base_name
, ".greg");
2110 /* If 2nd scheduling dump desired, open the output file. */
2112 sched2_dump_file
= open_dump_file (dump_base_name
, ".sched2");
2114 /* If jump2_opt dump desired, open the output file. */
2116 jump2_opt_dump_file
= open_dump_file (dump_base_name
, ".jump2");
2118 /* If dbr_sched dump desired, open the output file. */
2120 dbr_sched_dump_file
= open_dump_file (dump_base_name
, ".dbr");
2124 /* If stack_reg dump desired, open the output file. */
2126 stack_reg_dump_file
= open_dump_file (dump_base_name
, ".stack");
2130 /* Open assembler code output file. */
2132 if (! name_specified
&& asm_file_name
== 0)
2133 asm_out_file
= stdout
;
2136 int len
= strlen (dump_base_name
);
2137 register char *dumpname
= (char *) xmalloc (len
+ 6);
2138 strcpy (dumpname
, dump_base_name
);
2139 strip_off_ending (dumpname
, len
);
2140 strcat (dumpname
, ".s");
2141 if (asm_file_name
== 0)
2143 asm_file_name
= (char *) xmalloc (strlen (dumpname
) + 1);
2144 strcpy (asm_file_name
, dumpname
);
2146 if (!strcmp (asm_file_name
, "-"))
2147 asm_out_file
= stdout
;
2149 asm_out_file
= fopen (asm_file_name
, "w");
2150 if (asm_out_file
== 0)
2151 pfatal_with_name (asm_file_name
);
2154 #ifdef IO_BUFFER_SIZE
2155 setvbuf (asm_out_file
, (char *) xmalloc (IO_BUFFER_SIZE
),
2156 _IOFBF
, IO_BUFFER_SIZE
);
2159 input_filename
= name
;
2161 /* Perform language-specific initialization.
2162 This may set main_input_filename. */
2165 /* If the input doesn't start with a #line, use the input name
2166 as the official input file name. */
2167 if (main_input_filename
== 0)
2168 main_input_filename
= name
;
2170 /* Put an entry on the input file stack for the main input file. */
2172 = (struct file_stack
*) xmalloc (sizeof (struct file_stack
));
2173 input_file_stack
->next
= 0;
2174 input_file_stack
->name
= input_filename
;
2176 if (!output_bytecode
)
2178 ASM_FILE_START (asm_out_file
);
2181 /* Output something to inform GDB that this compilation was by GCC. Also
2182 serves to tell GDB file consists of bytecodes. */
2183 if (output_bytecode
)
2184 fprintf (asm_out_file
, "bc_gcc2_compiled.:\n");
2187 #ifndef ASM_IDENTIFY_GCC
2188 fprintf (asm_out_file
, "gcc2_compiled.:\n");
2190 ASM_IDENTIFY_GCC (asm_out_file
);
2194 /* Output something to identify which front-end produced this file. */
2195 #ifdef ASM_IDENTIFY_LANGUAGE
2196 ASM_IDENTIFY_LANGUAGE (asm_out_file
);
2199 if (output_bytecode
)
2201 if (profile_flag
|| profile_block_flag
)
2202 error ("profiling not supported in bytecode compilation");
2206 /* ??? Note: There used to be a conditional here
2207 to call assemble_zeros without fail if DBX_DEBUGGING_INFO is defined.
2208 This was to guarantee separation between gcc_compiled. and
2209 the first function, for the sake of dbx on Suns.
2210 However, having the extra zero here confused the Emacs
2211 code for unexec, and might confuse other programs too.
2212 Therefore, I took out that change.
2213 In future versions we should find another way to solve
2214 that dbx problem. -- rms, 23 May 93. */
2216 /* Don't let the first function fall at the same address
2217 as gcc_compiled., if profiling. */
2218 if (profile_flag
|| profile_block_flag
)
2219 assemble_zeros (UNITS_PER_WORD
);
2222 /* If dbx symbol table desired, initialize writing it
2223 and output the predefined types. */
2224 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
2225 if (write_symbols
== DBX_DEBUG
|| write_symbols
== XCOFF_DEBUG
)
2226 TIMEVAR (symout_time
, dbxout_init (asm_out_file
, main_input_filename
,
2229 #ifdef SDB_DEBUGGING_INFO
2230 if (write_symbols
== SDB_DEBUG
)
2231 TIMEVAR (symout_time
, sdbout_init (asm_out_file
, main_input_filename
,
2234 #ifdef DWARF_DEBUGGING_INFO
2235 if (write_symbols
== DWARF_DEBUG
)
2236 TIMEVAR (symout_time
, dwarfout_init (asm_out_file
, main_input_filename
));
2239 /* Initialize yet another pass. */
2241 if (!output_bytecode
)
2242 init_final (main_input_filename
);
2244 start_time
= get_run_time ();
2246 /* Call the parser, which parses the entire file
2247 (calling rest_of_compilation for each function). */
2249 if (yyparse () != 0)
2251 if (errorcount
== 0)
2252 fprintf (stderr
, "Errors detected in input file (your bison.simple is out of date)");
2254 /* In case there were missing closebraces,
2255 get us back to the global binding level. */
2256 while (! global_bindings_p ())
2260 /* Compilation is now finished except for writing
2261 what's left of the symbol table output. */
2263 parse_time
+= get_run_time () - start_time
;
2265 parse_time
-= integration_time
;
2266 parse_time
-= varconst_time
;
2268 globals
= getdecls ();
2270 /* Really define vars that have had only a tentative definition.
2271 Really output inline functions that must actually be callable
2272 and have not been output so far. */
2275 int len
= list_length (globals
);
2276 tree
*vec
= (tree
*) alloca (sizeof (tree
) * len
);
2281 /* Process the decls in reverse order--earliest first.
2282 Put them into VEC from back to front, then take out from front. */
2284 for (i
= 0, decl
= globals
; i
< len
; i
++, decl
= TREE_CHAIN (decl
))
2285 vec
[len
- i
- 1] = decl
;
2287 for (i
= 0; i
< len
; i
++)
2291 /* We're not deferring this any longer. */
2292 DECL_DEFER_OUTPUT (decl
) = 0;
2294 if (TREE_CODE (decl
) == VAR_DECL
&& DECL_SIZE (decl
) == 0
2295 && incomplete_decl_finalize_hook
!= 0)
2296 (*incomplete_decl_finalize_hook
) (decl
);
2299 /* Now emit any global variables or functions that we have been putting
2300 off. We need to loop in case one of the things emitted here
2301 references another one which comes earlier in the list. */
2305 for (i
= 0; i
< len
; i
++)
2309 if (TREE_ASM_WRITTEN (decl
) || DECL_EXTERNAL (decl
))
2312 /* Don't write out static consts, unless we still need them.
2314 We also keep static consts if not optimizing (for debugging).
2315 ??? They might be better written into the debug information.
2316 This is possible when using DWARF.
2318 A language processor that wants static constants to be always
2319 written out (even if it is not used) is responsible for
2320 calling rest_of_decl_compilation itself. E.g. the C front-end
2321 calls rest_of_decl_compilation from finish_decl.
2322 One motivation for this is that is conventional in some
2323 environments to write things like:
2324 static const char rcsid[] = "... version string ...";
2325 intending to force the string to be in the executable.
2327 A language processor that would prefer to have unneeded
2328 static constants "optimized away" would just defer writing
2329 them out until here. E.g. C++ does this, because static
2330 constants are often defined in header files.
2332 ??? A tempting alternative (for both C and C++) would be
2333 to force a constant to be written if and only if it is
2334 defined in a main file, as opposed to an include file. */
2336 if (TREE_CODE (decl
) == VAR_DECL
&& TREE_STATIC (decl
)
2337 && (! TREE_READONLY (decl
)
2338 || TREE_PUBLIC (decl
)
2340 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl
))))
2343 rest_of_decl_compilation (decl
, NULL_PTR
, 1, 1);
2346 if (TREE_CODE (decl
) == FUNCTION_DECL
2347 && DECL_INITIAL (decl
) != 0
2348 && DECL_SAVED_INSNS (decl
) != 0
2349 && (flag_keep_inline_functions
2350 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl
))))
2353 temporary_allocation ();
2354 output_inline_function (decl
);
2355 permanent_allocation (1);
2360 for (i
= 0; i
< len
; i
++)
2364 if (TREE_CODE (decl
) == VAR_DECL
&& TREE_STATIC (decl
)
2365 && ! TREE_ASM_WRITTEN (decl
))
2366 /* Cancel the RTL for this decl so that, if debugging info
2367 output for global variables is still to come,
2368 this one will be omitted. */
2369 DECL_RTL (decl
) = NULL
;
2371 /* Warn about any function
2372 declared static but not defined.
2373 We don't warn about variables,
2374 because many programs have static variables
2375 that exist only to get some text into the object file. */
2376 if (TREE_CODE (decl
) == FUNCTION_DECL
2378 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl
)))
2379 && DECL_INITIAL (decl
) == 0
2380 && DECL_EXTERNAL (decl
)
2381 && ! TREE_PUBLIC (decl
))
2383 pedwarn_with_decl (decl
,
2384 "`%s' declared `static' but never defined");
2385 /* This symbol is effectively an "extern" declaration now. */
2386 TREE_PUBLIC (decl
) = 1;
2387 assemble_external (decl
);
2390 /* Warn about static fns or vars defined but not used,
2391 but not about inline functions or static consts
2392 since defining those in header files is normal practice. */
2394 && ((TREE_CODE (decl
) == FUNCTION_DECL
&& ! DECL_INLINE (decl
))
2395 || (TREE_CODE (decl
) == VAR_DECL
&& ! TREE_READONLY (decl
)))
2396 && ! DECL_IN_SYSTEM_HEADER (decl
)
2397 && ! DECL_EXTERNAL (decl
)
2398 && ! TREE_PUBLIC (decl
)
2399 && ! TREE_USED (decl
)
2400 && ! DECL_REGISTER (decl
)
2401 /* The TREE_USED bit for file-scope decls
2402 is kept in the identifier, to handle multiple
2403 external decls in different scopes. */
2404 && ! TREE_USED (DECL_NAME (decl
)))
2405 warning_with_decl (decl
, "`%s' defined but not used");
2407 #ifdef SDB_DEBUGGING_INFO
2408 /* The COFF linker can move initialized global vars to the end.
2409 And that can screw up the symbol ordering.
2410 By putting the symbols in that order to begin with,
2411 we avoid a problem. mcsun!unido!fauern!tumuc!pes@uunet.uu.net. */
2412 if (write_symbols
== SDB_DEBUG
&& TREE_CODE (decl
) == VAR_DECL
2413 && TREE_PUBLIC (decl
) && DECL_INITIAL (decl
)
2414 && ! DECL_EXTERNAL (decl
)
2415 && DECL_RTL (decl
) != 0)
2416 TIMEVAR (symout_time
, sdbout_symbol (decl
, 0));
2418 /* Output COFF information for non-global
2419 file-scope initialized variables. */
2420 if (write_symbols
== SDB_DEBUG
2421 && TREE_CODE (decl
) == VAR_DECL
2422 && DECL_INITIAL (decl
)
2423 && ! DECL_EXTERNAL (decl
)
2424 && DECL_RTL (decl
) != 0
2425 && GET_CODE (DECL_RTL (decl
)) == MEM
)
2426 TIMEVAR (symout_time
, sdbout_toplevel_data (decl
));
2427 #endif /* SDB_DEBUGGING_INFO */
2428 #ifdef DWARF_DEBUGGING_INFO
2429 /* Output DWARF information for file-scope tentative data object
2430 declarations, file-scope (extern) function declarations (which
2431 had no corresponding body) and file-scope tagged type declarations
2432 and definitions which have not yet been forced out. */
2434 if (write_symbols
== DWARF_DEBUG
2435 && (TREE_CODE (decl
) != FUNCTION_DECL
|| !DECL_INITIAL (decl
)))
2436 TIMEVAR (symout_time
, dwarfout_file_scope_decl (decl
, 1));
2441 /* Do dbx symbols */
2442 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
2443 if (write_symbols
== DBX_DEBUG
|| write_symbols
== XCOFF_DEBUG
)
2444 TIMEVAR (symout_time
,
2446 dbxout_finish (asm_out_file
, main_input_filename
);
2450 #ifdef DWARF_DEBUGGING_INFO
2451 if (write_symbols
== DWARF_DEBUG
)
2452 TIMEVAR (symout_time
,
2458 /* Output some stuff at end of file if nec. */
2460 if (!output_bytecode
)
2462 end_final (main_input_filename
);
2465 ASM_FILE_END (asm_out_file
);
2469 /* Language-specific end of compilation actions. */
2473 if (output_bytecode
)
2474 bc_write_file (asm_out_file
);
2476 /* Close the dump files. */
2478 if (flag_gen_aux_info
)
2480 fclose (aux_info_file
);
2482 unlink (aux_info_file_name
);
2486 fclose (rtl_dump_file
);
2489 fclose (jump_opt_dump_file
);
2492 fclose (cse_dump_file
);
2495 fclose (loop_dump_file
);
2498 fclose (cse2_dump_file
);
2501 fclose (flow_dump_file
);
2505 dump_combine_total_stats (combine_dump_file
);
2506 fclose (combine_dump_file
);
2510 fclose (sched_dump_file
);
2513 fclose (local_reg_dump_file
);
2515 if (global_reg_dump
)
2516 fclose (global_reg_dump_file
);
2519 fclose (sched2_dump_file
);
2522 fclose (jump2_opt_dump_file
);
2525 fclose (dbr_sched_dump_file
);
2529 fclose (stack_reg_dump_file
);
2532 /* Close non-debugging input and output files. Take special care to note
2533 whether fclose returns an error, since the pages might still be on the
2534 buffer chain while the file is open. */
2537 if (ferror (asm_out_file
) != 0 || fclose (asm_out_file
) != 0)
2538 fatal_io_error (asm_file_name
);
2540 /* Print the times. */
2544 fprintf (stderr
,"\n");
2545 print_time ("parse", parse_time
);
2547 if (!output_bytecode
)
2549 print_time ("integration", integration_time
);
2550 print_time ("jump", jump_time
);
2551 print_time ("cse", cse_time
);
2552 print_time ("loop", loop_time
);
2553 print_time ("cse2", cse2_time
);
2554 print_time ("flow", flow_time
);
2555 print_time ("combine", combine_time
);
2556 print_time ("sched", sched_time
);
2557 print_time ("local-alloc", local_alloc_time
);
2558 print_time ("global-alloc", global_alloc_time
);
2559 print_time ("sched2", sched2_time
);
2560 print_time ("dbranch", dbr_sched_time
);
2561 print_time ("shorten-branch", shorten_branch_time
);
2562 print_time ("stack-reg", stack_reg_time
);
2563 print_time ("final", final_time
);
2564 print_time ("varconst", varconst_time
);
2565 print_time ("symout", symout_time
);
2566 print_time ("dump", dump_time
);
2571 /* This is called from various places for FUNCTION_DECL, VAR_DECL,
2572 and TYPE_DECL nodes.
2574 This does nothing for local (non-static) variables.
2575 Otherwise, it sets up the RTL and outputs any assembler code
2576 (label definition, storage allocation and initialization).
2578 DECL is the declaration. If ASMSPEC is nonzero, it specifies
2579 the assembler symbol name to be used. TOP_LEVEL is nonzero
2580 if this declaration is not within a function. */
2583 rest_of_decl_compilation (decl
, asmspec
, top_level
, at_end
)
2589 /* Declarations of variables, and of functions defined elsewhere. */
2591 /* The most obvious approach, to put an #ifndef around where
2592 this macro is used, doesn't work since it's inside a macro call. */
2593 #ifndef ASM_FINISH_DECLARE_OBJECT
2594 #define ASM_FINISH_DECLARE_OBJECT(FILE, DECL, TOP, END)
2597 /* Forward declarations for nested functions are not "external",
2598 but we need to treat them as if they were. */
2599 if (TREE_STATIC (decl
) || DECL_EXTERNAL (decl
)
2600 || TREE_CODE (decl
) == FUNCTION_DECL
)
2601 TIMEVAR (varconst_time
,
2603 make_decl_rtl (decl
, asmspec
, top_level
);
2604 /* Initialized extern variable exists to be replaced
2605 with its value, or represents something that will be
2606 output in another file. */
2607 if (! (TREE_CODE (decl
) == VAR_DECL
2608 && DECL_EXTERNAL (decl
) && TREE_READONLY (decl
)
2609 && DECL_INITIAL (decl
) != 0
2610 && DECL_INITIAL (decl
) != error_mark_node
))
2611 /* Don't output anything
2612 when a tentative file-scope definition is seen.
2613 But at end of compilation, do output code for them. */
2614 if (! (! at_end
&& top_level
2615 && (DECL_INITIAL (decl
) == 0
2616 || DECL_INITIAL (decl
) == error_mark_node
)))
2617 assemble_variable (decl
, top_level
, at_end
, 0);
2618 if (decl
== last_assemble_variable_decl
)
2620 ASM_FINISH_DECLARE_OBJECT (asm_out_file
, decl
,
2624 else if (DECL_REGISTER (decl
) && asmspec
!= 0)
2626 if (decode_reg_name (asmspec
) >= 0)
2628 DECL_RTL (decl
) = 0;
2629 make_decl_rtl (decl
, asmspec
, top_level
);
2632 error ("invalid register name `%s' for register variable", asmspec
);
2634 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
2635 else if ((write_symbols
== DBX_DEBUG
|| write_symbols
== XCOFF_DEBUG
)
2636 && TREE_CODE (decl
) == TYPE_DECL
)
2637 TIMEVAR (symout_time
, dbxout_symbol (decl
, 0));
2639 #ifdef SDB_DEBUGGING_INFO
2640 else if (write_symbols
== SDB_DEBUG
&& top_level
2641 && TREE_CODE (decl
) == TYPE_DECL
)
2642 TIMEVAR (symout_time
, sdbout_symbol (decl
, 0));
2646 /* Called after finishing a record, union or enumeral type. */
2649 rest_of_type_compilation (type
, toplev
)
2653 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
2654 if (write_symbols
== DBX_DEBUG
|| write_symbols
== XCOFF_DEBUG
)
2655 TIMEVAR (symout_time
, dbxout_symbol (TYPE_STUB_DECL (type
), !toplev
));
2657 #ifdef SDB_DEBUGGING_INFO
2658 if (write_symbols
== SDB_DEBUG
)
2659 TIMEVAR (symout_time
, sdbout_symbol (TYPE_STUB_DECL (type
), !toplev
));
2663 /* This is called from finish_function (within yyparse)
2664 after each top-level definition is parsed.
2665 It is supposed to compile that function or variable
2666 and output the assembler code for it.
2667 After we return, the tree storage is freed. */
2670 rest_of_compilation (decl
)
2674 int start_time
= get_run_time ();
2676 /* Nonzero if we have saved the original DECL_INITIAL of the function,
2677 to be restored after we finish compiling the function
2678 (for use when compiling inline calls to this function). */
2679 tree saved_block_tree
= 0;
2680 /* Likewise, for DECL_ARGUMENTS. */
2681 tree saved_arguments
= 0;
2684 if (output_bytecode
)
2687 /* If we are reconsidering an inline function
2688 at the end of compilation, skip the stuff for making it inline. */
2690 if (DECL_SAVED_INSNS (decl
) == 0)
2692 int specd
= DECL_INLINE (decl
);
2695 /* If requested, consider whether to make this function inline. */
2696 if (specd
|| flag_inline_functions
)
2697 TIMEVAR (integration_time
,
2699 lose
= function_cannot_inline_p (decl
);
2700 /* If not optimzing, then make sure the DECL_INLINE
2702 if (lose
|| ! optimize
)
2704 if (warn_inline
&& specd
)
2705 warning_with_decl (decl
, lose
);
2706 DECL_INLINE (decl
) = 0;
2707 /* Don't really compile an extern inline function.
2708 If we can't make it inline, pretend
2709 it was only declared. */
2710 if (DECL_EXTERNAL (decl
))
2712 DECL_INITIAL (decl
) = 0;
2713 goto exit_rest_of_compilation
;
2717 DECL_INLINE (decl
) = 1;
2720 insns
= get_insns ();
2722 /* Dump the rtl code if we are dumping rtl. */
2727 fprintf (rtl_dump_file
, "\n;; Function %s\n\n",
2728 IDENTIFIER_POINTER (DECL_NAME (decl
)));
2729 if (DECL_SAVED_INSNS (decl
))
2730 fprintf (rtl_dump_file
, ";; (integrable)\n\n");
2731 print_rtl (rtl_dump_file
, insns
);
2732 fflush (rtl_dump_file
);
2735 /* If function is inline, and we don't yet know whether to
2736 compile it by itself, defer decision till end of compilation.
2737 finish_compilation will call rest_of_compilation again
2738 for those functions that need to be output. Also defer those
2739 functions that were marked inline but weren't inlined; they
2740 may never be used. */
2742 if ((specd
|| DECL_INLINE (decl
))
2743 && ((! TREE_PUBLIC (decl
) && ! TREE_ADDRESSABLE (decl
)
2744 && ! flag_keep_inline_functions
)
2745 || DECL_DEFER_OUTPUT (decl
)
2746 || DECL_EXTERNAL (decl
)))
2748 #ifdef DWARF_DEBUGGING_INFO
2749 /* Generate the DWARF info for the "abstract" instance
2750 of a function which we may later generate inlined and/or
2751 out-of-line instances of. */
2752 if (write_symbols
== DWARF_DEBUG
)
2754 set_decl_abstract_flags (decl
, 1);
2755 TIMEVAR (symout_time
, dwarfout_file_scope_decl (decl
, 0));
2756 set_decl_abstract_flags (decl
, 0);
2759 TIMEVAR (integration_time
, save_for_inline_nocopy (decl
));
2760 goto exit_rest_of_compilation
;
2763 /* If we have to compile the function now, save its rtl and subdecls
2764 so that its compilation will not affect what others get. */
2765 if (DECL_INLINE (decl
))
2767 #ifdef DWARF_DEBUGGING_INFO
2768 /* Generate the DWARF info for the "abstract" instance of
2769 a function which we will generate an out-of-line instance
2770 of almost immediately (and which we may also later generate
2771 various inlined instances of). */
2772 if (write_symbols
== DWARF_DEBUG
)
2774 set_decl_abstract_flags (decl
, 1);
2775 TIMEVAR (symout_time
, dwarfout_file_scope_decl (decl
, 0));
2776 set_decl_abstract_flags (decl
, 0);
2779 saved_block_tree
= DECL_INITIAL (decl
);
2780 saved_arguments
= DECL_ARGUMENTS (decl
);
2781 TIMEVAR (integration_time
, save_for_inline_copying (decl
));
2785 if (DECL_DEFER_OUTPUT (decl
))
2786 goto exit_rest_of_compilation
;
2788 TREE_ASM_WRITTEN (decl
) = 1;
2790 /* Now that integrate will no longer see our rtl, we need not distinguish
2791 between the return value of this function and the return value of called
2793 rtx_equal_function_value_matters
= 0;
2795 /* Don't return yet if -Wreturn-type; we need to do jump_optimize. */
2796 if ((rtl_dump_and_exit
|| flag_syntax_only
) && !warn_return_type
)
2798 goto exit_rest_of_compilation
;
2801 /* From now on, allocate rtl in current_obstack, not in saveable_obstack.
2802 Note that that may have been done above, in save_for_inline_copying.
2803 The call to resume_temporary_allocation near the end of this function
2804 goes back to the usual state of affairs. */
2806 rtl_in_current_obstack ();
2809 /* If we are doing position-independent code generation, now
2810 is the time to output special prologues and epilogues.
2811 We do not want to do this earlier, because it just clutters
2812 up inline functions with meaningless insns. */
2817 insns
= get_insns ();
2819 /* Copy any shared structure that should not be shared. */
2821 unshare_all_rtl (insns
);
2823 /* Instantiate all virtual registers. */
2825 instantiate_virtual_regs (current_function_decl
, get_insns ());
2827 /* See if we have allocated stack slots that are not directly addressable.
2828 If so, scan all the insns and create explicit address computation
2829 for all references to such slots. */
2830 /* fixup_stack_slots (); */
2832 /* Do jump optimization the first time, if -opt.
2833 Also do it if -W, but in that case it doesn't change the rtl code,
2834 it only computes whether control can drop off the end of the function. */
2836 if (optimize
> 0 || extra_warnings
|| warn_return_type
2837 /* If function is `noreturn', we should warn if it tries to return. */
2838 || TREE_THIS_VOLATILE (decl
))
2840 TIMEVAR (jump_time
, reg_scan (insns
, max_reg_num (), 0));
2841 TIMEVAR (jump_time
, jump_optimize (insns
, 0, 0, 1));
2844 /* Now is when we stop if -fsyntax-only and -Wreturn-type. */
2845 if (rtl_dump_and_exit
|| flag_syntax_only
)
2846 goto exit_rest_of_compilation
;
2848 /* Dump rtl code after jump, if we are doing that. */
2853 fprintf (jump_opt_dump_file
, "\n;; Function %s\n\n",
2854 IDENTIFIER_POINTER (DECL_NAME (decl
)));
2855 print_rtl (jump_opt_dump_file
, insns
);
2856 fflush (jump_opt_dump_file
);
2859 /* Perform common subexpression elimination.
2860 Nonzero value from `cse_main' means that jumps were simplified
2861 and some code may now be unreachable, so do
2862 jump optimization again. */
2867 fprintf (cse_dump_file
, "\n;; Function %s\n\n",
2868 IDENTIFIER_POINTER (DECL_NAME (decl
)));
2873 TIMEVAR (cse_time
, reg_scan (insns
, max_reg_num (), 1));
2875 if (flag_thread_jumps
)
2876 /* Hacks by tiemann & kenner. */
2877 TIMEVAR (jump_time
, thread_jumps (insns
, max_reg_num (), 1));
2879 TIMEVAR (cse_time
, tem
= cse_main (insns
, max_reg_num (),
2881 TIMEVAR (cse_time
, delete_dead_from_cse (insns
, max_reg_num ()));
2884 TIMEVAR (jump_time
, jump_optimize (insns
, 0, 0, 0));
2887 /* Dump rtl code after cse, if we are doing that. */
2892 print_rtl (cse_dump_file
, insns
);
2893 fflush (cse_dump_file
);
2899 fprintf (loop_dump_file
, "\n;; Function %s\n\n",
2900 IDENTIFIER_POINTER (DECL_NAME (decl
)));
2903 /* Move constant computations out of loops. */
2909 loop_optimize (insns
, loop_dump_file
);
2913 /* Dump rtl code after loop opt, if we are doing that. */
2918 print_rtl (loop_dump_file
, insns
);
2919 fflush (loop_dump_file
);
2925 fprintf (cse2_dump_file
, "\n;; Function %s\n\n",
2926 IDENTIFIER_POINTER (DECL_NAME (decl
)));
2929 if (optimize
> 0 && flag_rerun_cse_after_loop
)
2931 /* Running another jump optimization pass before the second
2932 cse pass sometimes simplifies the RTL enough to allow
2933 the second CSE pass to do a better job. Jump_optimize can change
2934 max_reg_num so we must rerun reg_scan afterwards.
2935 ??? Rework to not call reg_scan so often. */
2936 TIMEVAR (jump_time
, reg_scan (insns
, max_reg_num (), 0));
2937 TIMEVAR (jump_time
, jump_optimize (insns
, 0, 0, 1));
2939 TIMEVAR (cse2_time
, reg_scan (insns
, max_reg_num (), 0));
2940 TIMEVAR (cse2_time
, tem
= cse_main (insns
, max_reg_num (),
2941 1, cse2_dump_file
));
2943 TIMEVAR (jump_time
, jump_optimize (insns
, 0, 0, 0));
2946 if (optimize
> 0 && flag_thread_jumps
)
2947 /* This pass of jump threading straightens out code
2948 that was kinked by loop optimization. */
2949 TIMEVAR (jump_time
, thread_jumps (insns
, max_reg_num (), 0));
2951 /* Dump rtl code after cse, if we are doing that. */
2956 print_rtl (cse2_dump_file
, insns
);
2957 fflush (cse2_dump_file
);
2960 /* We are no longer anticipating cse in this function, at least. */
2962 cse_not_expected
= 1;
2964 /* Now we choose between stupid (pcc-like) register allocation
2965 (if we got the -noreg switch and not -opt)
2966 and smart register allocation. */
2968 if (optimize
> 0) /* Stupid allocation probably won't work */
2969 obey_regdecls
= 0; /* if optimizations being done. */
2973 /* Print function header into flow dump now
2974 because doing the flow analysis makes some of the dump. */
2979 fprintf (flow_dump_file
, "\n;; Function %s\n\n",
2980 IDENTIFIER_POINTER (DECL_NAME (decl
)));
2987 regclass (insns
, max_reg_num ());
2988 stupid_life_analysis (insns
, max_reg_num (),
2994 /* Do control and data flow analysis,
2995 and write some of the results to dump file. */
2997 TIMEVAR (flow_time
, flow_analysis (insns
, max_reg_num (),
2999 if (warn_uninitialized
)
3001 uninitialized_vars_warning (DECL_INITIAL (decl
));
3002 setjmp_args_warning ();
3006 /* Dump rtl after flow analysis. */
3011 print_rtl (flow_dump_file
, insns
);
3012 fflush (flow_dump_file
);
3015 /* If -opt, try combining insns through substitution. */
3018 TIMEVAR (combine_time
, combine_instructions (insns
, max_reg_num ()));
3020 /* Dump rtl code after insn combination. */
3025 fprintf (combine_dump_file
, "\n;; Function %s\n\n",
3026 IDENTIFIER_POINTER (DECL_NAME (decl
)));
3027 dump_combine_stats (combine_dump_file
);
3028 print_rtl (combine_dump_file
, insns
);
3029 fflush (combine_dump_file
);
3032 /* Print function header into sched dump now
3033 because doing the sched analysis makes some of the dump. */
3038 fprintf (sched_dump_file
, "\n;; Function %s\n\n",
3039 IDENTIFIER_POINTER (DECL_NAME (decl
)));
3042 if (optimize
> 0 && flag_schedule_insns
)
3044 /* Do control and data sched analysis,
3045 and write some of the results to dump file. */
3047 TIMEVAR (sched_time
, schedule_insns (sched_dump_file
));
3050 /* Dump rtl after instruction scheduling. */
3055 print_rtl (sched_dump_file
, insns
);
3056 fflush (sched_dump_file
);
3059 /* Unless we did stupid register allocation,
3060 allocate pseudo-regs that are used only within 1 basic block. */
3063 TIMEVAR (local_alloc_time
,
3065 regclass (insns
, max_reg_num ());
3069 /* Dump rtl code after allocating regs within basic blocks. */
3074 fprintf (local_reg_dump_file
, "\n;; Function %s\n\n",
3075 IDENTIFIER_POINTER (DECL_NAME (decl
)));
3076 dump_flow_info (local_reg_dump_file
);
3077 dump_local_alloc (local_reg_dump_file
);
3078 print_rtl (local_reg_dump_file
, insns
);
3079 fflush (local_reg_dump_file
);
3082 if (global_reg_dump
)
3084 fprintf (global_reg_dump_file
, "\n;; Function %s\n\n",
3085 IDENTIFIER_POINTER (DECL_NAME (decl
))));
3087 /* Unless we did stupid register allocation,
3088 allocate remaining pseudo-regs, then do the reload pass
3089 fixing up any insns that are invalid. */
3091 TIMEVAR (global_alloc_time
,
3094 failure
= global_alloc (global_reg_dump_file
);
3096 failure
= reload (insns
, 0, global_reg_dump_file
);
3099 if (global_reg_dump
)
3102 dump_global_regs (global_reg_dump_file
);
3103 print_rtl (global_reg_dump_file
, insns
);
3104 fflush (global_reg_dump_file
);
3108 goto exit_rest_of_compilation
;
3110 reload_completed
= 1;
3112 /* On some machines, the prologue and epilogue code, or parts thereof,
3113 can be represented as RTL. Doing so lets us schedule insns between
3114 it and the rest of the code and also allows delayed branch
3115 scheduling to operate in the epilogue. */
3117 thread_prologue_and_epilogue_insns (insns
);
3119 if (optimize
> 0 && flag_schedule_insns_after_reload
)
3124 fprintf (sched2_dump_file
, "\n;; Function %s\n\n",
3125 IDENTIFIER_POINTER (DECL_NAME (decl
)));
3128 /* Do control and data sched analysis again,
3129 and write some more of the results to dump file. */
3131 TIMEVAR (sched2_time
, schedule_insns (sched2_dump_file
));
3133 /* Dump rtl after post-reorder instruction scheduling. */
3138 print_rtl (sched2_dump_file
, insns
);
3139 fflush (sched2_dump_file
);
3143 #ifdef LEAF_REGISTERS
3145 if (optimize
> 0 && only_leaf_regs_used () && leaf_function_p ())
3149 /* One more attempt to remove jumps to .+1
3150 left by dead-store-elimination.
3151 Also do cross-jumping this time
3152 and delete no-op move insns. */
3156 TIMEVAR (jump_time
, jump_optimize (insns
, 1, 1, 0));
3159 /* Dump rtl code after jump, if we are doing that. */
3164 fprintf (jump2_opt_dump_file
, "\n;; Function %s\n\n",
3165 IDENTIFIER_POINTER (DECL_NAME (decl
)));
3166 print_rtl (jump2_opt_dump_file
, insns
);
3167 fflush (jump2_opt_dump_file
);
3170 /* If a machine dependent reorganization is needed, call it. */
3171 #ifdef MACHINE_DEPENDENT_REORG
3172 MACHINE_DEPENDENT_REORG (insns
);
3175 /* If a scheduling pass for delayed branches is to be done,
3176 call the scheduling code. */
3179 if (optimize
> 0 && flag_delayed_branch
)
3181 TIMEVAR (dbr_sched_time
, dbr_schedule (insns
, dbr_sched_dump_file
));
3186 fprintf (dbr_sched_dump_file
, "\n;; Function %s\n\n",
3187 IDENTIFIER_POINTER (DECL_NAME (decl
)));
3188 print_rtl (dbr_sched_dump_file
, insns
);
3189 fflush (dbr_sched_dump_file
);
3196 /* Shorten branches. */
3197 TIMEVAR (shorten_branch_time
,
3199 shorten_branches (get_insns ());
3203 TIMEVAR (stack_reg_time
, reg_to_stack (insns
, stack_reg_dump_file
));
3208 fprintf (stack_reg_dump_file
, "\n;; Function %s\n\n",
3209 IDENTIFIER_POINTER (DECL_NAME (decl
)));
3210 print_rtl (stack_reg_dump_file
, insns
);
3211 fflush (stack_reg_dump_file
);
3216 /* Now turn the rtl into assembler code. */
3218 TIMEVAR (final_time
,
3223 /* Get the function's name, as described by its RTL.
3224 This may be different from the DECL_NAME name used
3225 in the source file. */
3227 x
= DECL_RTL (decl
);
3228 if (GET_CODE (x
) != MEM
)
3231 if (GET_CODE (x
) != SYMBOL_REF
)
3233 fnname
= XSTR (x
, 0);
3235 assemble_start_function (decl
, fnname
);
3236 final_start_function (insns
, asm_out_file
, optimize
);
3237 final (insns
, asm_out_file
, optimize
, 0);
3238 final_end_function (insns
, asm_out_file
, optimize
);
3239 assemble_end_function (decl
, fnname
);
3240 fflush (asm_out_file
);
3243 /* Write DBX symbols if requested */
3245 /* Note that for those inline functions where we don't initially
3246 know for certain that we will be generating an out-of-line copy,
3247 the first invocation of this routine (rest_of_compilation) will
3248 skip over this code by doing a `goto exit_rest_of_compilation;'.
3249 Later on, finish_compilation will call rest_of_compilation again
3250 for those inline functions that need to have out-of-line copies
3251 generated. During that call, we *will* be routed past here. */
3253 #ifdef DBX_DEBUGGING_INFO
3254 if (write_symbols
== DBX_DEBUG
)
3255 TIMEVAR (symout_time
, dbxout_function (decl
));
3258 #ifdef DWARF_DEBUGGING_INFO
3259 if (write_symbols
== DWARF_DEBUG
)
3260 TIMEVAR (symout_time
, dwarfout_file_scope_decl (decl
, 0));
3263 exit_rest_of_compilation
:
3265 /* In case the function was not output,
3266 don't leave any temporary anonymous types
3267 queued up for sdb output. */
3268 #ifdef SDB_DEBUGGING_INFO
3269 if (write_symbols
== SDB_DEBUG
)
3270 sdbout_types (NULL_TREE
);
3273 /* Put back the tree of subblocks and list of arguments
3274 from before we copied them.
3275 Code generation and the output of debugging info may have modified
3276 the copy, but the original is unchanged. */
3278 if (saved_block_tree
!= 0)
3279 DECL_INITIAL (decl
) = saved_block_tree
;
3280 if (saved_arguments
!= 0)
3281 DECL_ARGUMENTS (decl
) = saved_arguments
;
3283 reload_completed
= 0;
3285 /* Clear out the real_constant_chain before some of the rtx's
3286 it runs through become garbage. */
3288 clear_const_double_mem ();
3290 /* Cancel the effect of rtl_in_current_obstack. */
3292 resume_temporary_allocation ();
3294 /* The parsing time is all the time spent in yyparse
3295 *except* what is spent in this function. */
3297 parse_time
-= get_run_time () - start_time
;
3300 /* Entry point of cc1/c++. Decode command args, then call compile_file.
3301 Exit code is 35 if can't open files, 34 if fatal error,
3302 33 if had nonfatal errors, else success. */
3305 main (argc
, argv
, envp
)
3312 int flag_print_mem
= 0;
3313 int version_flag
= 0;
3316 /* save in case md file wants to emit args as a comment. */
3320 p
= argv
[0] + strlen (argv
[0]);
3321 while (p
!= argv
[0] && p
[-1] != '/') --p
;
3325 /* Get rid of any avoidable limit on stack size. */
3329 /* Set the stack limit huge so that alloca does not fail. */
3330 getrlimit (RLIMIT_STACK
, &rlim
);
3331 rlim
.rlim_cur
= rlim
.rlim_max
;
3332 setrlimit (RLIMIT_STACK
, &rlim
);
3334 #endif /* RLIMIT_STACK */
3336 signal (SIGFPE
, float_signal
);
3339 signal (SIGPIPE
, pipe_closed
);
3342 decl_printable_name
= decl_name
;
3343 lang_expand_expr
= (struct rtx_def
*(*)()) do_abort
;
3345 /* Initialize whether `char' is signed. */
3346 flag_signed_char
= DEFAULT_SIGNED_CHAR
;
3347 #ifdef DEFAULT_SHORT_ENUMS
3348 /* Initialize how much space enums occupy, by default. */
3349 flag_short_enums
= DEFAULT_SHORT_ENUMS
;
3352 /* Scan to see what optimization level has been specified. That will
3353 determine the default value of many flags. */
3354 for (i
= 1; i
< argc
; i
++)
3356 if (!strcmp (argv
[i
], "-O"))
3360 else if (argv
[i
][0] == '-' && argv
[i
][1] == 'O')
3362 /* Handle -O2, -O3, -O69, ... */
3363 char *p
= &argv
[i
][2];
3367 if (! (c
>= '0' && c
<= '9'))
3370 optimize
= atoi (&argv
[i
][2]);
3374 obey_regdecls
= (optimize
== 0);
3384 flag_thread_jumps
= 1;
3386 flag_delayed_branch
= 1;
3388 #ifdef CAN_DEBUG_WITHOUT_FP
3389 flag_omit_frame_pointer
= 1;
3395 flag_cse_follow_jumps
= 1;
3396 flag_cse_skip_blocks
= 1;
3397 flag_expensive_optimizations
= 1;
3398 flag_strength_reduce
= 1;
3399 flag_rerun_cse_after_loop
= 1;
3400 flag_caller_saves
= 1;
3401 #ifdef INSN_SCHEDULING
3402 flag_schedule_insns
= 1;
3403 flag_schedule_insns_after_reload
= 1;
3409 flag_inline_functions
= 1;
3412 #ifdef OPTIMIZATION_OPTIONS
3413 /* Allow default optimizations to be specified on a per-machine basis. */
3414 OPTIMIZATION_OPTIONS (optimize
);
3417 /* Initialize register usage now so switches may override. */
3421 set_target_switch ("");
3423 for (i
= 1; i
< argc
; i
++)
3426 /* If this is a language-specific option,
3427 decode it in a language-specific way. */
3428 for (j
= 0; lang_options
[j
] != 0; j
++)
3429 if (!strncmp (argv
[i
], lang_options
[j
],
3430 strlen (lang_options
[j
])))
3432 if (lang_options
[j
] != 0)
3433 /* If the option is valid for *some* language,
3434 treat it as valid even if this language doesn't understand it. */
3435 lang_decode_option (argv
[i
]);
3436 else if (argv
[i
][0] == '-' && argv
[i
][1] != 0)
3438 register char *str
= argv
[i
] + 1;
3443 set_target_switch (&str
[1]);
3444 else if (!strcmp (str
, "dumpbase"))
3446 dump_base_name
= argv
[++i
];
3448 else if (str
[0] == 'd')
3450 register char *p
= &str
[1];
3458 global_reg_dump
= 1;
3464 cse_dump
= 1, cse2_dump
= 1;
3482 global_reg_dump
= 1;
3500 flag_print_asm_name
= 1;
3522 rtl_dump_and_exit
= 1;
3526 else if (str
[0] == 'f')
3528 register char *p
= &str
[1];
3531 /* Some kind of -f option.
3532 P's value is the option sans `-f'.
3533 Search for it in the table of options. */
3536 !found
&& j
< sizeof (f_options
) / sizeof (f_options
[0]);
3539 if (!strcmp (p
, f_options
[j
].string
))
3541 *f_options
[j
].variable
= f_options
[j
].on_value
;
3542 /* A goto here would be cleaner,
3543 but breaks the vax pcc. */
3546 if (p
[0] == 'n' && p
[1] == 'o' && p
[2] == '-'
3547 && ! strcmp (p
+3, f_options
[j
].string
))
3549 *f_options
[j
].variable
= ! f_options
[j
].on_value
;
3556 else if (!strncmp (p
, "fixed-", 6))
3557 fix_register (&p
[6], 1, 1);
3558 else if (!strncmp (p
, "call-used-", 10))
3559 fix_register (&p
[10], 0, 1);
3560 else if (!strncmp (p
, "call-saved-", 11))
3561 fix_register (&p
[11], 0, 0);
3563 error ("Invalid option `%s'", argv
[i
]);
3565 else if (str
[0] == 'O')
3567 register char *p
= str
+1;
3568 while (*p
&& *p
>= '0' && *p
<= '9')
3573 error ("Invalid option `%s'", argv
[i
]);
3575 else if (!strcmp (str
, "pedantic"))
3577 else if (!strcmp (str
, "pedantic-errors"))
3578 flag_pedantic_errors
= pedantic
= 1;
3579 else if (!strcmp (str
, "quiet"))
3581 else if (!strcmp (str
, "version"))
3583 else if (!strcmp (str
, "w"))
3584 inhibit_warnings
= 1;
3585 else if (!strcmp (str
, "W"))
3588 /* We save the value of warn_uninitialized, since if they put
3589 -Wuninitialized on the command line, we need to generate a
3590 warning about not using it without also specifying -O. */
3591 if (warn_uninitialized
!= 1)
3592 warn_uninitialized
= 2;
3594 else if (str
[0] == 'W')
3596 register char *p
= &str
[1];
3599 /* Some kind of -W option.
3600 P's value is the option sans `-W'.
3601 Search for it in the table of options. */
3604 !found
&& j
< sizeof (W_options
) / sizeof (W_options
[0]);
3607 if (!strcmp (p
, W_options
[j
].string
))
3609 *W_options
[j
].variable
= W_options
[j
].on_value
;
3610 /* A goto here would be cleaner,
3611 but breaks the vax pcc. */
3614 if (p
[0] == 'n' && p
[1] == 'o' && p
[2] == '-'
3615 && ! strcmp (p
+3, W_options
[j
].string
))
3617 *W_options
[j
].variable
= ! W_options
[j
].on_value
;
3624 else if (!strncmp (p
, "id-clash-", 9))
3630 if (*endp
>= '0' && *endp
<= '9')
3634 error ("Invalid option `%s'", argv
[i
]);
3639 id_clash_len
= atoi (str
+ 10);
3642 else if (!strncmp (p
, "larger-than-", 12))
3644 char *endp
= p
+ 12;
3648 if (*endp
>= '0' && *endp
<= '9')
3652 error ("Invalid option `%s'", argv
[i
]);
3653 goto larger_than_lose
;
3656 warn_larger_than
= 1;
3657 larger_than_size
= atoi (str
+ 13);
3661 error ("Invalid option `%s'", argv
[i
]);
3663 else if (!strcmp (str
, "p"))
3665 if (!output_bytecode
)
3668 error ("profiling not supported in bytecode compilation");
3670 else if (!strcmp (str
, "a"))
3672 #if !defined (BLOCK_PROFILER) || !defined (FUNCTION_BLOCK_PROFILER)
3673 warning ("`-a' option (basic block profile) not supported");
3675 profile_block_flag
= 1;
3678 else if (str
[0] == 'g')
3685 while (*p
&& (*p
< '0' || *p
> '9'))
3689 while (*q
&& (*q
>= '0' && *q
<= '9'))
3694 level
= 2; /* default debugging info level */
3695 if (*q
|| level
> 3)
3697 warning ("invalid debug level specification in option: `-%s'",
3699 warning ("no debugging information will be generated");
3703 /* If more than one debugging type is supported,
3704 you must define PREFERRED_DEBUGGING_TYPE
3705 to choose a format in a system-dependent way. */
3706 /* This is one long line cause VAXC can't handle a \-newline. */
3707 #if 1 < (defined (DBX_DEBUGGING_INFO) + defined (SDB_DEBUGGING_INFO) + defined (DWARF_DEBUGGING_INFO) + defined (XCOFF_DEBUGGING_INFO))
3708 #ifdef PREFERRED_DEBUGGING_TYPE
3709 if (!strncmp (str
, "ggdb", len
))
3710 write_symbols
= PREFERRED_DEBUGGING_TYPE
;
3711 #else /* no PREFERRED_DEBUGGING_TYPE */
3712 You Lose
! You must define PREFERRED_DEBUGGING_TYPE
!
3713 #endif /* no PREFERRED_DEBUGGING_TYPE */
3714 #endif /* More than one debugger format enabled. */
3715 #ifdef DBX_DEBUGGING_INFO
3716 if (write_symbols
!= NO_DEBUG
)
3718 else if (!strncmp (str
, "ggdb", len
))
3719 write_symbols
= DBX_DEBUG
;
3720 else if (!strncmp (str
, "gstabs", len
))
3721 write_symbols
= DBX_DEBUG
;
3722 else if (!strncmp (str
, "gstabs+", len
))
3723 write_symbols
= DBX_DEBUG
;
3725 /* Always enable extensions for -ggdb or -gstabs+,
3726 always disable for -gstabs.
3727 For plain -g, use system-specific default. */
3728 if (write_symbols
== DBX_DEBUG
&& !strncmp (str
, "ggdb", len
)
3730 use_gnu_debug_info_extensions
= 1;
3731 else if (write_symbols
== DBX_DEBUG
&& !strncmp (str
, "gstabs+", len
)
3733 use_gnu_debug_info_extensions
= 1;
3734 else if (write_symbols
== DBX_DEBUG
3735 && !strncmp (str
, "gstabs", len
) && len
>= 2)
3736 use_gnu_debug_info_extensions
= 0;
3738 use_gnu_debug_info_extensions
= DEFAULT_GDB_EXTENSIONS
;
3739 #endif /* DBX_DEBUGGING_INFO */
3740 #ifdef DWARF_DEBUGGING_INFO
3741 if (write_symbols
!= NO_DEBUG
)
3743 else if (!strncmp (str
, "g", len
))
3744 write_symbols
= DWARF_DEBUG
;
3745 else if (!strncmp (str
, "ggdb", len
))
3746 write_symbols
= DWARF_DEBUG
;
3747 else if (!strncmp (str
, "gdwarf", len
))
3748 write_symbols
= DWARF_DEBUG
;
3750 /* Always enable extensions for -ggdb or -gdwarf+,
3751 always disable for -gdwarf.
3752 For plain -g, use system-specific default. */
3753 if (write_symbols
== DWARF_DEBUG
&& !strncmp (str
, "ggdb", len
)
3755 use_gnu_debug_info_extensions
= 1;
3756 else if (write_symbols
== DWARF_DEBUG
&& !strcmp (str
, "gdwarf+"))
3757 use_gnu_debug_info_extensions
= 1;
3758 else if (write_symbols
== DWARF_DEBUG
3759 && !strncmp (str
, "gdwarf", len
) && len
>= 2)
3760 use_gnu_debug_info_extensions
= 0;
3762 use_gnu_debug_info_extensions
= DEFAULT_GDB_EXTENSIONS
;
3764 #ifdef SDB_DEBUGGING_INFO
3765 if (write_symbols
!= NO_DEBUG
)
3767 else if (!strncmp (str
, "g", len
))
3768 write_symbols
= SDB_DEBUG
;
3769 else if (!strncmp (str
, "gdb", len
))
3770 write_symbols
= SDB_DEBUG
;
3771 else if (!strncmp (str
, "gcoff", len
))
3772 write_symbols
= SDB_DEBUG
;
3773 #endif /* SDB_DEBUGGING_INFO */
3774 #ifdef XCOFF_DEBUGGING_INFO
3775 if (write_symbols
!= NO_DEBUG
)
3777 else if (!strncmp (str
, "g", len
))
3778 write_symbols
= XCOFF_DEBUG
;
3779 else if (!strncmp (str
, "ggdb", len
))
3780 write_symbols
= XCOFF_DEBUG
;
3781 else if (!strncmp (str
, "gxcoff", len
))
3782 write_symbols
= XCOFF_DEBUG
;
3784 /* Always enable extensions for -ggdb or -gxcoff+,
3785 always disable for -gxcoff.
3786 For plain -g, use system-specific default. */
3787 if (write_symbols
== XCOFF_DEBUG
&& !strncmp (str
, "ggdb", len
)
3789 use_gnu_debug_info_extensions
= 1;
3790 else if (write_symbols
== XCOFF_DEBUG
&& !strcmp (str
, "gxcoff+"))
3791 use_gnu_debug_info_extensions
= 1;
3792 else if (write_symbols
== XCOFF_DEBUG
3793 && !strncmp (str
, "gxcoff", len
) && len
>= 2)
3794 use_gnu_debug_info_extensions
= 0;
3796 use_gnu_debug_info_extensions
= DEFAULT_GDB_EXTENSIONS
;
3798 if (write_symbols
== NO_DEBUG
)
3799 warning ("`-%s' option not supported on this version of GCC", str
);
3800 else if (level
== 0)
3801 write_symbols
= NO_DEBUG
;
3803 debug_info_level
= (enum debug_info_level
) level
;
3805 else if (!strcmp (str
, "o"))
3807 asm_file_name
= argv
[++i
];
3809 else if (str
[0] == 'G')
3811 g_switch_set
= TRUE
;
3812 g_switch_value
= atoi ((str
[1] != '\0') ? str
+1 : argv
[++i
]);
3814 else if (!strncmp (str
, "aux-info", 8))
3816 flag_gen_aux_info
= 1;
3817 aux_info_file_name
= (str
[8] != '\0' ? str
+8 : argv
[++i
]);
3820 error ("Invalid option `%s'", argv
[i
]);
3822 else if (argv
[i
][0] == '+')
3823 error ("Invalid option `%s'", argv
[i
]);
3828 /* Initialize for bytecode output. A good idea to do this as soon as
3829 possible after the "-f" options have been parsed. */
3830 if (output_bytecode
)
3832 #ifndef TARGET_SUPPORTS_BYTECODE
3833 /* Just die with a fatal error if not supported */
3834 fatal ("-fbytecode not supporter for this target");
3842 /* Inlining does not work if not optimizing,
3843 so force it not to be done. */
3847 /* The c_decode_option and lang_decode_option functions set
3848 this to `2' if -Wall is used, so we can avoid giving out
3849 lots of errors for people who don't realize what -Wall does. */
3850 if (warn_uninitialized
== 1)
3851 warning ("-Wuninitialized is not supported without -O");
3854 #if defined(DWARF_DEBUGGING_INFO)
3855 if (write_symbols
== DWARF_DEBUG
3856 && strcmp (language_string
, "GNU C++") == 0)
3858 warning ("-g option not supported for C++ on SVR4 systems");
3859 write_symbols
= NO_DEBUG
;
3861 #endif /* defined(DWARF_DEBUGGING_INFO) */
3863 #ifdef OVERRIDE_OPTIONS
3864 /* Some machines may reject certain combinations of options. */
3868 /* Unrolling all loops implies that standard loop unrolling must also
3870 if (flag_unroll_all_loops
)
3871 flag_unroll_loops
= 1;
3872 /* Loop unrolling requires that strength_reduction be on also. Silently
3873 turn on strength reduction here if it isn't already on. Also, the loop
3874 unrolling code assumes that cse will be run after loop, so that must
3875 be turned on also. */
3876 if (flag_unroll_loops
)
3878 flag_strength_reduce
= 1;
3879 flag_rerun_cse_after_loop
= 1;
3882 /* Warn about options that are not supported on this machine. */
3883 #ifndef INSN_SCHEDULING
3884 if (flag_schedule_insns
|| flag_schedule_insns_after_reload
)
3885 warning ("instruction scheduling not supported on this target machine");
3888 if (flag_delayed_branch
)
3889 warning ("this target machine does not have delayed branches");
3892 /* If we are in verbose mode, write out the version and maybe all the
3893 option flags in use. */
3896 fprintf (stderr
, "%s version %s", language_string
, version_string
);
3897 #ifdef TARGET_VERSION
3902 #define __VERSION__ "[unknown]"
3904 fprintf (stderr
, " compiled by GNU C version %s.\n", __VERSION__
);
3906 fprintf (stderr
, " compiled by CC.\n");
3909 print_switch_values ();
3912 compile_file (filename
);
3921 char *lim
= (char *) sbrk (0);
3923 fprintf (stderr
, "Data size %d.\n",
3924 lim
- (char *) &environ
);
3928 system ("ps -l 1>&2");
3931 #endif /* not USG */
3933 #endif /* not VMS */
3934 #endif /* not OS2 */
3937 exit (FATAL_EXIT_CODE
);
3939 exit (FATAL_EXIT_CODE
);
3940 exit (SUCCESS_EXIT_CODE
);
3944 /* Decode -m switches. */
3946 /* Here is a table, controlled by the tm.h file, listing each -m switch
3947 and which bits in `target_switches' it should set or clear.
3948 If VALUE is positive, it is bits to set.
3949 If VALUE is negative, -VALUE is bits to clear.
3950 (The sign bit is not used so there is no confusion.) */
3952 struct {char *name
; int value
;} target_switches
[]
3955 /* This table is similar, but allows the switch to have a value. */
3957 #ifdef TARGET_OPTIONS
3958 struct {char *prefix
; char ** variable
;} target_options
[]
3962 /* Decode the switch -mNAME. */
3965 set_target_switch (name
)
3971 for (j
= 0; j
< sizeof target_switches
/ sizeof target_switches
[0]; j
++)
3972 if (!strcmp (target_switches
[j
].name
, name
))
3974 if (target_switches
[j
].value
< 0)
3975 target_flags
&= ~-target_switches
[j
].value
;
3977 target_flags
|= target_switches
[j
].value
;
3981 #ifdef TARGET_OPTIONS
3983 for (j
= 0; j
< sizeof target_options
/ sizeof target_options
[0]; j
++)
3985 int len
= strlen (target_options
[j
].prefix
);
3986 if (!strncmp (target_options
[j
].prefix
, name
, len
))
3988 *target_options
[j
].variable
= name
+ len
;
3995 error ("Invalid option `%s'", name
);
3998 /* Variable used for communication between the following two routines. */
4000 static int line_position
;
4002 /* Print an option value and adjust the position in the line. */
4005 print_single_switch (type
, name
)
4008 fprintf (stderr
, " %s%s", type
, name
);
4010 line_position
+= strlen (type
) + strlen (name
) + 1;
4012 if (line_position
> 65)
4014 fprintf (stderr
, "\n\t");
4019 /* Print default target switches for -version. */
4022 print_switch_values ()
4026 fprintf (stderr
, "enabled:");
4029 for (j
= 0; j
< sizeof f_options
/ sizeof f_options
[0]; j
++)
4030 if (*f_options
[j
].variable
== f_options
[j
].on_value
)
4031 print_single_switch ("-f", f_options
[j
].string
);
4033 for (j
= 0; j
< sizeof W_options
/ sizeof W_options
[0]; j
++)
4034 if (*W_options
[j
].variable
== W_options
[j
].on_value
)
4035 print_single_switch ("-W", W_options
[j
].string
);
4037 for (j
= 0; j
< sizeof target_switches
/ sizeof target_switches
[0]; j
++)
4038 if (target_switches
[j
].name
[0] != '\0'
4039 && target_switches
[j
].value
> 0
4040 && ((target_switches
[j
].value
& target_flags
)
4041 == target_switches
[j
].value
))
4042 print_single_switch ("-m", target_switches
[j
].name
);
4044 fprintf (stderr
, "\n");