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",
595 "-Wno-char-subscripts",
609 "-Wno-missing-braces",
610 "-Wmissing-declarations",
611 "-Wno-missing-declarations",
612 "-Wmissing-prototypes",
613 "-Wno-missing-prototypes",
615 "-Wno-nested-externs",
619 "-Wno-pointer-arith",
621 "-Wno-redundant-decls",
622 "-Wstrict-prototypes",
623 "-Wno-strict-prototypes",
629 "-Wno-write-strings",
631 /* These are for C++. */
632 "-+e0", /* gcc.c tacks the `-' on the front. */
637 "-falt-external-templates",
638 "-fno-alt-external-templates",
639 "-fansi-overloading",
640 "-fno-ansi-overloading",
644 "-fno-conserve-space",
646 "-fno-default-inline",
649 "-felide-constructors",
650 "-fno-elide-constructors",
652 "-fno-enum-int-equiv",
653 "-fexternal-templates",
654 "-fno-external-templates",
657 "-fhandle-exceptions",
658 "-fno-handle-exceptions",
659 "-fhandle-signatures",
660 "-fno-handle-signatures",
663 "-fimplement-inlines",
664 "-fno-implement-inlines",
665 "-fimplicit-templates",
666 "-fno-implicit-templates",
670 "-fno-memoize-lookups",
672 "-fno-nonnull-objects",
674 "-fno-save-memoized",
679 "-fstrict-prototype",
680 "-fno-strict-prototype",
681 "-fthis-is-variable",
682 "-fno-this-is-variable",
684 "-fno-vtable-thunks",
690 "-Woverloaded-virtual",
691 "-Wno-overloaded-virtual",
694 "-Wtemplate-debugging",
695 "-Wno-template-debugging",
696 "-Wctor-dtor-privacy",
697 "-Wno-ctor-dtor-privacy",
699 "-Wno-extern-inline",
701 /* these are for obj c */
713 /* This is for GNAT and is temporary. */
718 /* Options controlling warnings */
720 /* Don't print warning messages. -w. */
722 int inhibit_warnings
= 0;
724 /* Print various extra warnings. -W. */
726 int extra_warnings
= 0;
728 /* Treat warnings as errors. -Werror. */
730 int warnings_are_errors
= 0;
732 /* Nonzero to warn about unused local variables. */
736 /* Nonzero to warn about variables used before they are initialized. */
738 int warn_uninitialized
;
740 /* Nonzero means warn about all declarations which shadow others. */
744 /* Warn if a switch on an enum fails to have a case for every enum value. */
748 /* Nonzero means warn about function definitions that default the return type
749 or that use a null return and have a return-type other than void. */
751 int warn_return_type
;
753 /* Nonzero means warn about pointer casts that increase the required
754 alignment of the target type (and might therefore lead to a crash
755 due to a misaligned access). */
759 /* Nonzero means warn about any identifiers that match in the first N
760 characters. The value N is in `id_clash_len'. */
763 unsigned id_clash_len
;
765 /* Nonzero means warn about any objects definitions whose size is larger
766 than N bytes. Also want about function definitions whose returned
767 values are larger than N bytes. The value N is in `larger_than_size'. */
769 int warn_larger_than
;
770 unsigned larger_than_size
;
772 /* Nonzero means warn if inline function is too large. */
776 /* Warn if a function returns an aggregate,
777 since there are often incompatible calling conventions for doing this. */
779 int warn_aggregate_return
;
781 /* Likewise for -W. */
783 struct { char *string
; int *variable
; int on_value
;} W_options
[] =
785 {"unused", &warn_unused
, 1},
786 {"error", &warnings_are_errors
, 1},
787 {"shadow", &warn_shadow
, 1},
788 {"switch", &warn_switch
, 1},
789 {"aggregate-return", &warn_aggregate_return
, 1},
790 {"cast-align", &warn_cast_align
, 1},
791 {"uninitialized", &warn_uninitialized
, 1},
792 {"inline", &warn_inline
, 1}
795 /* Output files for assembler code (real compiler output)
796 and debugging dumps. */
801 FILE *jump_opt_dump_file
;
803 FILE *loop_dump_file
;
804 FILE *cse2_dump_file
;
805 FILE *flow_dump_file
;
806 FILE *combine_dump_file
;
807 FILE *sched_dump_file
;
808 FILE *local_reg_dump_file
;
809 FILE *global_reg_dump_file
;
810 FILE *sched2_dump_file
;
811 FILE *jump2_opt_dump_file
;
812 FILE *dbr_sched_dump_file
;
813 FILE *stack_reg_dump_file
;
815 /* Time accumulators, to count the total time spent in various passes. */
819 int integration_time
;
827 int local_alloc_time
;
828 int global_alloc_time
;
831 int shorten_branch_time
;
837 /* Return time used so far, in microseconds. */
846 struct rusage rusage
;
851 int proc_system_time
;
853 int child_system_time
;
863 return (tms
.tms_utime
+ tms
.tms_stime
) * (1000000 / HZ
);
866 getrusage (0, &rusage
);
867 return (rusage
.ru_utime
.tv_sec
* 1000000 + rusage
.ru_utime
.tv_usec
868 + rusage
.ru_stime
.tv_sec
* 1000000 + rusage
.ru_stime
.tv_usec
);
871 return (vms_times
.proc_user_time
+ vms_times
.proc_system_time
) * 10000;
876 #define TIMEVAR(VAR, BODY) \
877 do { int otime = get_run_time (); BODY; VAR += get_run_time () - otime; } while (0)
880 print_time (str
, total
)
885 "time in %s: %d.%06d\n",
886 str
, total
/ 1000000, total
% 1000000);
889 /* Count an error or warning. Return 1 if the message should be printed. */
892 count_error (warningp
)
895 if (warningp
&& inhibit_warnings
)
898 if (warningp
&& !warnings_are_errors
)
902 static int warning_message
= 0;
904 if (warningp
&& !warning_message
)
906 fprintf (stderr
, "%s: warnings being treated as errors\n", progname
);
915 /* Print a fatal error message. NAME is the text.
916 Also include a system error message based on `errno'. */
919 pfatal_with_name (name
)
922 fprintf (stderr
, "%s: ", progname
);
928 fatal_io_error (name
)
931 fprintf (stderr
, "%s: %s: I/O error\n", progname
, name
);
935 /* Called to give a better error message when we don't have an insn to match
936 what we are looking for or if the insn's constraints aren't satisfied,
937 rather than just calling abort(). */
940 fatal_insn_not_found (insn
)
943 if (!output_bytecode
)
945 if (INSN_CODE (insn
) < 0)
946 error ("internal error--unrecognizable insn:");
948 error ("internal error--insn does not satisfy its constraints:");
952 fflush (asm_out_file
);
954 fflush (aux_info_file
);
956 fflush (rtl_dump_file
);
957 if (jump_opt_dump_file
)
958 fflush (jump_opt_dump_file
);
960 fflush (cse_dump_file
);
962 fflush (loop_dump_file
);
964 fflush (cse2_dump_file
);
966 fflush (flow_dump_file
);
967 if (combine_dump_file
)
968 fflush (combine_dump_file
);
970 fflush (sched_dump_file
);
971 if (local_reg_dump_file
)
972 fflush (local_reg_dump_file
);
973 if (global_reg_dump_file
)
974 fflush (global_reg_dump_file
);
975 if (sched2_dump_file
)
976 fflush (sched2_dump_file
);
977 if (jump2_opt_dump_file
)
978 fflush (jump2_opt_dump_file
);
979 if (dbr_sched_dump_file
)
980 fflush (dbr_sched_dump_file
);
981 if (stack_reg_dump_file
)
982 fflush (stack_reg_dump_file
);
986 /* This is the default decl_printable_name function. */
989 decl_name (decl
, kind
)
993 return IDENTIFIER_POINTER (DECL_NAME (decl
));
996 static int need_error_newline
;
998 /* Function of last error message;
999 more generally, function such that if next error message is in it
1000 then we don't have to mention the function name. */
1001 static tree last_error_function
= NULL
;
1003 /* Used to detect when input_file_stack has changed since last described. */
1004 static int last_error_tick
;
1006 /* Called when the start of a function definition is parsed,
1007 this function prints on stderr the name of the function. */
1010 announce_function (decl
)
1016 if (rtl_dump_and_exit
)
1017 fprintf (stderr
, "%s ", IDENTIFIER_POINTER (DECL_NAME (decl
)));
1019 fprintf (stderr
, " %s", (*decl_printable_name
) (decl
, &junk
));
1021 need_error_newline
= 1;
1022 last_error_function
= current_function_decl
;
1026 /* Prints out, if necessary, the name of the current function
1027 which caused an error. Called from all error and warning functions. */
1030 report_error_function (file
)
1033 struct file_stack
*p
;
1035 if (need_error_newline
)
1037 fprintf (stderr
, "\n");
1038 need_error_newline
= 0;
1041 if (last_error_function
!= current_function_decl
)
1043 char *kind
= "function";
1044 if (current_function_decl
!= 0
1045 && TREE_CODE (TREE_TYPE (current_function_decl
)) == METHOD_TYPE
)
1049 fprintf (stderr
, "%s: ", file
);
1051 if (current_function_decl
== NULL
)
1052 fprintf (stderr
, "At top level:\n");
1055 char *name
= (*decl_printable_name
) (current_function_decl
, &kind
);
1056 fprintf (stderr
, "In %s `%s':\n", kind
, name
);
1059 last_error_function
= current_function_decl
;
1061 if (input_file_stack
&& input_file_stack
->next
!= 0
1062 && input_file_stack_tick
!= last_error_tick
)
1064 fprintf (stderr
, "In file included");
1065 for (p
= input_file_stack
->next
; p
; p
= p
->next
)
1067 fprintf (stderr
, " from %s:%d", p
->name
, p
->line
);
1069 fprintf (stderr
, ",\n ");
1071 fprintf (stderr
, ":\n");
1072 last_error_tick
= input_file_stack_tick
;
1076 /* Print a message. */
1079 vmessage (prefix
, s
, ap
)
1085 fprintf (stderr
, "%s: ", prefix
);
1088 vfprintf (stderr
, s
, ap
);
1091 HOST_WIDE_INT v1
= va_arg(ap
, HOST_WIDE_INT
);
1092 HOST_WIDE_INT v2
= va_arg(ap
, HOST_WIDE_INT
);
1093 HOST_WIDE_INT v3
= va_arg(ap
, HOST_WIDE_INT
);
1094 fprintf (stderr
, s
, v1
, v2
, v3
);
1099 /* Print a message relevant to line LINE of file FILE. */
1102 v_message_with_file_and_line (file
, line
, prefix
, s
, ap
)
1110 fprintf (stderr
, "%s:%d: ", file
, line
);
1112 fprintf (stderr
, "%s: ", progname
);
1114 vmessage (prefix
, s
, ap
);
1115 fputc ('\n', stderr
);
1118 /* Print a message relevant to the given DECL. */
1121 v_message_with_decl (decl
, prefix
, s
, ap
)
1129 fprintf (stderr
, "%s:%d: ",
1130 DECL_SOURCE_FILE (decl
), DECL_SOURCE_LINE (decl
));
1133 fprintf (stderr
, "%s: ", prefix
);
1135 /* Do magic to get around lack of varargs support for insertion
1136 of arguments into existing list. We know that the decl is first;
1137 we ass_u_me that it will be printed with "%s". */
1139 for (p
= s
; *p
; ++p
)
1143 if (*(p
+ 1) == '%')
1151 fwrite (s
, p
- s
, 1, stderr
);
1155 char *n
= (DECL_NAME (decl
)
1156 ? (*decl_printable_name
) (decl
, &junk
)
1162 if (isalpha (*(p
- 1) & 0xFF))
1168 vmessage ((char *)NULL
, p
, ap
);
1170 fputc ('\n', stderr
);
1173 /* Figure file and line of the given INSN. */
1176 file_and_line_for_asm (insn
, pfile
, pline
)
1181 rtx body
= PATTERN (insn
);
1184 /* Find the (or one of the) ASM_OPERANDS in the insn. */
1185 if (GET_CODE (body
) == SET
&& GET_CODE (SET_SRC (body
)) == ASM_OPERANDS
)
1186 asmop
= SET_SRC (body
);
1187 else if (GET_CODE (body
) == ASM_OPERANDS
)
1189 else if (GET_CODE (body
) == PARALLEL
1190 && GET_CODE (XVECEXP (body
, 0, 0)) == SET
)
1191 asmop
= SET_SRC (XVECEXP (body
, 0, 0));
1192 else if (GET_CODE (body
) == PARALLEL
1193 && GET_CODE (XVECEXP (body
, 0, 0)) == ASM_OPERANDS
)
1194 asmop
= XVECEXP (body
, 0, 0);
1200 *pfile
= ASM_OPERANDS_SOURCE_FILE (asmop
);
1201 *pline
= ASM_OPERANDS_SOURCE_LINE (asmop
);
1205 *pfile
= input_filename
;
1210 /* Report an error at line LINE of file FILE. */
1213 v_error_with_file_and_line (file
, line
, s
, ap
)
1220 report_error_function (file
);
1221 v_message_with_file_and_line (file
, line
, (char *)NULL
, s
, ap
);
1225 error_with_file_and_line
VPROTO((char *file
, int line
, char *s
, ...))
1237 file
= va_arg (ap
, char *);
1238 line
= va_arg (ap
, int);
1239 s
= va_arg (ap
, char *);
1242 v_error_with_file_and_line (file
, line
, s
, ap
);
1246 /* Report an error at the declaration DECL.
1247 S is a format string which uses %s to substitute the declaration
1248 name; subsequent substitutions are a la printf. */
1251 v_error_with_decl (decl
, s
, ap
)
1257 report_error_function (DECL_SOURCE_FILE (decl
));
1258 v_message_with_decl (decl
, (char *)NULL
, s
, ap
);
1262 error_with_decl
VPROTO((tree decl
, char *s
, ...))
1273 decl
= va_arg (ap
, tree
);
1274 s
= va_arg (ap
, char *);
1277 v_error_with_decl (decl
, s
, ap
);
1281 /* Report an error at the line number of the insn INSN.
1282 This is used only when INSN is an `asm' with operands,
1283 and each ASM_OPERANDS records its own source file and line. */
1286 v_error_for_asm (insn
, s
, ap
)
1295 file_and_line_for_asm (insn
, &file
, &line
);
1296 report_error_function (file
);
1297 v_message_with_file_and_line (file
, line
, (char *)NULL
, s
, ap
);
1301 error_for_asm
VPROTO((rtx insn
, char *s
, ...))
1312 insn
= va_arg (ap
, rtx
);
1313 s
= va_arg (ap
, char *);
1316 v_error_for_asm (insn
, s
, ap
);
1320 /* Report an error at the current line number. */
1327 v_error_with_file_and_line (input_filename
, lineno
, s
, ap
);
1331 error
VPROTO((char *s
, ...))
1341 s
= va_arg (ap
, char *);
1348 /* Report a fatal error at the current line number. */
1360 fatal
VPROTO((char *s
, ...))
1370 s
= va_arg (ap
, char *);
1377 /* Report a warning at line LINE of file FILE. */
1380 v_warning_with_file_and_line (file
, line
, s
, ap
)
1386 if (count_error (1))
1388 report_error_function (file
);
1389 v_message_with_file_and_line (file
, line
, "warning", s
, ap
);
1394 warning_with_file_and_line
VPROTO((char *file
, int line
, char *s
, ...))
1406 file
= va_arg (ap
, char *);
1407 line
= va_arg (ap
, int);
1408 s
= va_arg (ap
, char *);
1411 v_warning_with_file_and_line (file
, line
, s
, ap
);
1415 /* Report a warning at the declaration DECL.
1416 S is a format string which uses %s to substitute the declaration
1417 name; subsequent substitutions are a la printf. */
1420 v_warning_with_decl (decl
, s
, ap
)
1425 if (count_error (1))
1427 report_error_function (DECL_SOURCE_FILE (decl
));
1428 v_message_with_decl (decl
, "warning", s
, ap
);
1433 warning_with_decl
VPROTO((tree decl
, char *s
, ...))
1444 decl
= va_arg (ap
, tree
);
1445 s
= va_arg (ap
, char *);
1448 v_warning_with_decl (decl
, s
, ap
);
1452 /* Report a warning at the line number of the insn INSN.
1453 This is used only when INSN is an `asm' with operands,
1454 and each ASM_OPERANDS records its own source file and line. */
1457 v_warning_for_asm (insn
, s
, ap
)
1462 if (count_error (1))
1467 file_and_line_for_asm (insn
, &file
, &line
);
1468 report_error_function (file
);
1469 v_message_with_file_and_line (file
, line
, "warning", s
, ap
);
1474 warning_for_asm
VPROTO((rtx insn
, char *s
, ...))
1485 insn
= va_arg (ap
, rtx
);
1486 s
= va_arg (ap
, char *);
1489 v_warning_for_asm (insn
, s
, ap
);
1493 /* Report a warning at the current line number. */
1500 v_warning_with_file_and_line (input_filename
, lineno
, s
, ap
);
1504 warning
VPROTO((char *s
, ...))
1514 s
= va_arg (ap
, char *);
1521 /* These functions issue either warnings or errors depending on
1522 -pedantic-errors. */
1529 if (flag_pedantic_errors
)
1536 pedwarn
VPROTO((char *s
, ...))
1546 s
= va_arg (ap
, char *);
1554 v_pedwarn_with_decl (decl
, s
, ap
)
1559 /* We don't want -pedantic-errors to cause the compilation to fail from
1560 "errors" in system header files. Sometimes fixincludes can't fix what's
1561 broken (eg: unsigned char bitfields - fixing it may change the alignment
1562 which will cause programs to mysteriously fail because the C library
1563 or kernel uses the original layout). There's no point in issuing a
1564 warning either, it's just unnecessary noise. */
1566 if (! DECL_IN_SYSTEM_HEADER (decl
))
1568 if (flag_pedantic_errors
)
1569 v_error_with_decl (decl
, s
, ap
);
1571 v_warning_with_decl (decl
, s
, ap
);
1576 pedwarn_with_decl
VPROTO((tree decl
, char *s
, ...))
1587 decl
= va_arg (ap
, tree
);
1588 s
= va_arg (ap
, char *);
1591 v_pedwarn_with_decl (decl
, s
, ap
);
1596 v_pedwarn_with_file_and_line (file
, line
, s
, ap
)
1602 if (flag_pedantic_errors
)
1603 v_error_with_file_and_line (file
, line
, s
, ap
);
1605 v_warning_with_file_and_line (file
, line
, s
, ap
);
1609 pedwarn_with_file_and_line
VPROTO((char *file
, int line
, char *s
, ...))
1621 file
= va_arg (ap
, char *);
1622 line
= va_arg (ap
, int);
1623 s
= va_arg (ap
, char *);
1626 v_pedwarn_with_file_and_line (file
, line
, s
, ap
);
1630 /* Apologize for not implementing some feature. */
1639 fprintf (stderr
, "%s:%d: ", input_filename
, lineno
);
1641 fprintf (stderr
, "%s: ", progname
);
1642 vmessage ("sorry, not implemented", s
, ap
);
1643 fputc ('\n', stderr
);
1647 sorry
VPROTO((char *s
, ...))
1657 s
= va_arg (ap
, char *);
1664 /* Apologize for not implementing some feature, then quit. */
1667 v_really_sorry (s
, ap
)
1673 fprintf (stderr
, "%s:%d: ", input_filename
, lineno
);
1675 fprintf (stderr
, "%s: ", progname
);
1676 vmessage ("sorry, not implemented", s
, ap
);
1677 fatal (" (fatal)\n");
1681 really_sorry
VPROTO((char *s
, ...))
1691 s
= va_arg (ap
, char *);
1694 v_really_sorry (s
, ap
);
1698 /* More 'friendly' abort that prints the line and file.
1699 config.h can #define abort fancy_abort if you like that sort of thing.
1701 I don't think this is actually a good idea.
1702 Other sorts of crashes will look a certain way.
1703 It is a good thing if crashes from calling abort look the same way.
1709 fatal ("internal gcc abort");
1712 /* This calls abort and is used to avoid problems when abort if a macro.
1713 It is used when we need to pass the address of abort. */
1721 /* When `malloc.c' is compiled with `rcheck' defined,
1722 it calls this function to report clobberage. */
1730 /* Same as `malloc' but report error if no memory available. */
1736 register char *value
= (char *) malloc (size
);
1738 fatal ("virtual memory exhausted");
1742 /* Same as `realloc' but report error if no memory available. */
1745 xrealloc (ptr
, size
)
1749 char *result
= (char *) realloc (ptr
, size
);
1751 fatal ("virtual memory exhausted");
1755 /* Return the logarithm of X, base 2, considering X unsigned,
1756 if X is a power of 2. Otherwise, returns -1.
1758 This should be used via the `exact_log2' macro. */
1762 register unsigned HOST_WIDE_INT x
;
1764 register int log
= 0;
1765 /* Test for 0 or a power of 2. */
1766 if (x
== 0 || x
!= (x
& -x
))
1768 while ((x
>>= 1) != 0)
1773 /* Given X, an unsigned number, return the largest int Y such that 2**Y <= X.
1774 If X is 0, return -1.
1776 This should be used via the floor_log2 macro. */
1780 register unsigned HOST_WIDE_INT x
;
1782 register int log
= -1;
1790 jmp_buf float_handler
;
1792 /* Specify where to longjmp to when a floating arithmetic error happens.
1793 If HANDLER is 0, it means don't handle the errors any more. */
1796 set_float_handler (handler
)
1799 float_handled
= (handler
!= 0);
1801 bcopy (handler
, float_handler
, sizeof (float_handler
));
1804 /* Specify, in HANDLER, where to longjmp to when a floating arithmetic
1805 error happens, pushing the previous specification into OLD_HANDLER.
1806 Return an indication of whether there was a previous handler in effect. */
1809 push_float_handler (handler
, old_handler
)
1810 jmp_buf handler
, old_handler
;
1812 int was_handled
= float_handled
;
1816 bcopy (float_handler
, old_handler
, sizeof (float_handler
));
1817 bcopy (handler
, float_handler
, sizeof (float_handler
));
1821 /* Restore the previous specification of whether and where to longjmp to
1822 when a floating arithmetic error happens. */
1825 pop_float_handler (handled
, handler
)
1829 float_handled
= handled
;
1831 bcopy (handler
, float_handler
, sizeof (float_handler
));
1834 /* Signals actually come here. */
1837 float_signal (signo
)
1838 /* If this is missing, some compilers complain. */
1841 if (float_handled
== 0)
1843 #if defined (USG) || defined (hpux)
1844 signal (SIGFPE
, float_signal
); /* re-enable the signal catcher */
1847 signal (SIGFPE
, float_signal
);
1848 longjmp (float_handler
, 1);
1851 /* Handler for SIGPIPE. */
1855 /* If this is missing, some compilers complain. */
1858 fatal ("output pipe has been closed");
1861 /* Strip off a legitimate source ending from the input string NAME of
1865 strip_off_ending (name
, len
)
1869 if (len
> 2 && ! strcmp (".c", name
+ len
- 2))
1871 else if (len
> 2 && ! strcmp (".m", name
+ len
- 2))
1873 else if (len
> 2 && ! strcmp (".i", name
+ len
- 2))
1875 else if (len
> 3 && ! strcmp (".ii", name
+ len
- 3))
1877 else if (len
> 3 && ! strcmp (".co", name
+ len
- 3))
1879 else if (len
> 3 && ! strcmp (".cc", name
+ len
- 3))
1881 else if (len
> 2 && ! strcmp (".C", name
+ len
- 2))
1883 else if (len
> 4 && ! strcmp (".cxx", name
+ len
- 4))
1885 else if (len
> 4 && ! strcmp (".cpp", name
+ len
- 4))
1887 else if (len
> 2 && ! strcmp (".f", name
+ len
- 2))
1889 /* Ada will use extensions like .ada, .adb, and .ads, so just test
1891 else if (len
> 4 && ! strncmp (".ad", name
+ len
- 4, 3))
1893 else if (len
> 4 && ! strcmp (".atr", name
+ len
- 4))
1897 /* Output a quoted string. */
1899 output_quoted_string (asm_file
, string
)
1905 putc ('\"', asm_file
);
1906 while ((c
= *string
++) != 0)
1908 if (c
== '\"' || c
== '\\')
1909 putc ('\\', asm_file
);
1912 putc ('\"', asm_file
);
1915 /* Output a file name in the form wanted by System V. */
1918 output_file_directive (asm_file
, input_name
)
1922 int len
= strlen (input_name
);
1923 char *na
= input_name
+ len
;
1925 /* NA gets INPUT_NAME sans directory names. */
1926 while (na
> input_name
)
1933 #ifdef ASM_OUTPUT_MAIN_SOURCE_FILENAME
1934 ASM_OUTPUT_MAIN_SOURCE_FILENAME (asm_file
, na
);
1936 #ifdef ASM_OUTPUT_SOURCE_FILENAME
1937 ASM_OUTPUT_SOURCE_FILENAME (asm_file
, na
);
1939 fprintf (asm_file
, "\t.file\t");
1940 output_quoted_string (asm_file
, na
);
1941 fputc ('\n', asm_file
);
1946 /* Routine to build language identifier for object file. */
1948 output_lang_identify (asm_out_file
)
1951 int len
= strlen (lang_identify ()) + sizeof ("__gnu_compiled_") + 1;
1952 char *s
= (char *) alloca (len
);
1953 sprintf (s
, "__gnu_compiled_%s", lang_identify ());
1954 ASM_OUTPUT_LABEL (asm_out_file
, s
);
1957 /* Routine to open a dump file. */
1959 open_dump_file (base_name
, suffix
)
1964 char *dumpname
= (char *) alloca (strlen (base_name
) + strlen (suffix
) + 1);
1966 strcpy (dumpname
, base_name
);
1967 strcat (dumpname
, suffix
);
1968 f
= fopen (dumpname
, "w");
1970 pfatal_with_name (dumpname
);
1974 /* Compile an entire file of output from cpp, named NAME.
1975 Write a file of assembly output and various debugging dumps. */
1984 int name_specified
= name
!= 0;
1986 if (dump_base_name
== 0)
1987 dump_base_name
= name
? name
: "gccdump";
1991 integration_time
= 0;
1999 local_alloc_time
= 0;
2000 global_alloc_time
= 0;
2003 shorten_branch_time
= 0;
2009 /* Open input file. */
2011 if (name
== 0 || !strcmp (name
, "-"))
2017 finput
= fopen (name
, "r");
2019 pfatal_with_name (name
);
2021 #ifdef IO_BUFFER_SIZE
2022 setvbuf (finput
, (char *) xmalloc (IO_BUFFER_SIZE
), _IOFBF
, IO_BUFFER_SIZE
);
2025 /* Initialize data in various passes. */
2030 /* Some of these really don't need to be called when generating bytecode,
2031 but the options would have to be parsed first to know that. -bson */
2033 init_emit_once (debug_info_level
== DINFO_LEVEL_NORMAL
2034 || debug_info_level
== DINFO_LEVEL_VERBOSE
);
2036 init_decl_processing ();
2044 if (flag_caller_saves
)
2045 init_caller_save ();
2047 /* If auxiliary info generation is desired, open the output file.
2048 This goes in the same directory as the source file--unlike
2049 all the other output files. */
2050 if (flag_gen_aux_info
)
2052 aux_info_file
= fopen (aux_info_file_name
, "w");
2053 if (aux_info_file
== 0)
2054 pfatal_with_name (aux_info_file_name
);
2057 /* If rtl dump desired, open the output file. */
2059 rtl_dump_file
= open_dump_file (dump_base_name
, ".rtl");
2061 /* If jump_opt dump desired, open the output file. */
2063 jump_opt_dump_file
= open_dump_file (dump_base_name
, ".jump");
2065 /* If cse dump desired, open the output file. */
2067 cse_dump_file
= open_dump_file (dump_base_name
, ".cse");
2069 /* If loop dump desired, open the output file. */
2071 loop_dump_file
= open_dump_file (dump_base_name
, ".loop");
2073 /* If cse2 dump desired, open the output file. */
2075 cse2_dump_file
= open_dump_file (dump_base_name
, ".cse2");
2077 /* If flow dump desired, open the output file. */
2079 flow_dump_file
= open_dump_file (dump_base_name
, ".flow");
2081 /* If combine dump desired, open the output file. */
2083 combine_dump_file
= open_dump_file (dump_base_name
, ".combine");
2085 /* If scheduling dump desired, open the output file. */
2087 sched_dump_file
= open_dump_file (dump_base_name
, ".sched");
2089 /* If local_reg dump desired, open the output file. */
2091 local_reg_dump_file
= open_dump_file (dump_base_name
, ".lreg");
2093 /* If global_reg dump desired, open the output file. */
2094 if (global_reg_dump
)
2095 global_reg_dump_file
= open_dump_file (dump_base_name
, ".greg");
2097 /* If 2nd scheduling dump desired, open the output file. */
2099 sched2_dump_file
= open_dump_file (dump_base_name
, ".sched2");
2101 /* If jump2_opt dump desired, open the output file. */
2103 jump2_opt_dump_file
= open_dump_file (dump_base_name
, ".jump2");
2105 /* If dbr_sched dump desired, open the output file. */
2107 dbr_sched_dump_file
= open_dump_file (dump_base_name
, ".dbr");
2111 /* If stack_reg dump desired, open the output file. */
2113 stack_reg_dump_file
= open_dump_file (dump_base_name
, ".stack");
2117 /* Open assembler code output file. */
2119 if (! name_specified
&& asm_file_name
== 0)
2120 asm_out_file
= stdout
;
2123 int len
= strlen (dump_base_name
);
2124 register char *dumpname
= (char *) xmalloc (len
+ 6);
2125 strcpy (dumpname
, dump_base_name
);
2126 strip_off_ending (dumpname
, len
);
2127 strcat (dumpname
, ".s");
2128 if (asm_file_name
== 0)
2130 asm_file_name
= (char *) xmalloc (strlen (dumpname
) + 1);
2131 strcpy (asm_file_name
, dumpname
);
2133 if (!strcmp (asm_file_name
, "-"))
2134 asm_out_file
= stdout
;
2136 asm_out_file
= fopen (asm_file_name
, "w");
2137 if (asm_out_file
== 0)
2138 pfatal_with_name (asm_file_name
);
2141 #ifdef IO_BUFFER_SIZE
2142 setvbuf (asm_out_file
, (char *) xmalloc (IO_BUFFER_SIZE
),
2143 _IOFBF
, IO_BUFFER_SIZE
);
2146 input_filename
= name
;
2148 /* Perform language-specific initialization.
2149 This may set main_input_filename. */
2152 /* If the input doesn't start with a #line, use the input name
2153 as the official input file name. */
2154 if (main_input_filename
== 0)
2155 main_input_filename
= name
;
2157 /* Put an entry on the input file stack for the main input file. */
2159 = (struct file_stack
*) xmalloc (sizeof (struct file_stack
));
2160 input_file_stack
->next
= 0;
2161 input_file_stack
->name
= input_filename
;
2163 if (!output_bytecode
)
2165 ASM_FILE_START (asm_out_file
);
2168 /* Output something to inform GDB that this compilation was by GCC. Also
2169 serves to tell GDB file consists of bytecodes. */
2170 if (output_bytecode
)
2171 fprintf (asm_out_file
, "bc_gcc2_compiled.:\n");
2174 #ifndef ASM_IDENTIFY_GCC
2175 fprintf (asm_out_file
, "gcc2_compiled.:\n");
2177 ASM_IDENTIFY_GCC (asm_out_file
);
2181 /* Output something to identify which front-end produced this file. */
2182 #ifdef ASM_IDENTIFY_LANGUAGE
2183 ASM_IDENTIFY_LANGUAGE (asm_out_file
);
2186 if (output_bytecode
)
2188 if (profile_flag
|| profile_block_flag
)
2189 error ("profiling not supported in bytecode compilation");
2193 /* ??? Note: There used to be a conditional here
2194 to call assemble_zeros without fail if DBX_DEBUGGING_INFO is defined.
2195 This was to guarantee separation between gcc_compiled. and
2196 the first function, for the sake of dbx on Suns.
2197 However, having the extra zero here confused the Emacs
2198 code for unexec, and might confuse other programs too.
2199 Therefore, I took out that change.
2200 In future versions we should find another way to solve
2201 that dbx problem. -- rms, 23 May 93. */
2203 /* Don't let the first function fall at the same address
2204 as gcc_compiled., if profiling. */
2205 if (profile_flag
|| profile_block_flag
)
2206 assemble_zeros (UNITS_PER_WORD
);
2209 /* If dbx symbol table desired, initialize writing it
2210 and output the predefined types. */
2211 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
2212 if (write_symbols
== DBX_DEBUG
|| write_symbols
== XCOFF_DEBUG
)
2213 TIMEVAR (symout_time
, dbxout_init (asm_out_file
, main_input_filename
,
2216 #ifdef SDB_DEBUGGING_INFO
2217 if (write_symbols
== SDB_DEBUG
)
2218 TIMEVAR (symout_time
, sdbout_init (asm_out_file
, main_input_filename
,
2221 #ifdef DWARF_DEBUGGING_INFO
2222 if (write_symbols
== DWARF_DEBUG
)
2223 TIMEVAR (symout_time
, dwarfout_init (asm_out_file
, main_input_filename
));
2226 /* Initialize yet another pass. */
2228 if (!output_bytecode
)
2229 init_final (main_input_filename
);
2231 start_time
= get_run_time ();
2233 /* Call the parser, which parses the entire file
2234 (calling rest_of_compilation for each function). */
2236 if (yyparse () != 0)
2238 if (errorcount
== 0)
2239 fprintf (stderr
, "Errors detected in input file (your bison.simple is out of date)");
2241 /* In case there were missing closebraces,
2242 get us back to the global binding level. */
2243 while (! global_bindings_p ())
2247 /* Compilation is now finished except for writing
2248 what's left of the symbol table output. */
2250 parse_time
+= get_run_time () - start_time
;
2252 parse_time
-= integration_time
;
2253 parse_time
-= varconst_time
;
2255 globals
= getdecls ();
2257 /* Really define vars that have had only a tentative definition.
2258 Really output inline functions that must actually be callable
2259 and have not been output so far. */
2262 int len
= list_length (globals
);
2263 tree
*vec
= (tree
*) alloca (sizeof (tree
) * len
);
2267 /* Process the decls in reverse order--earliest first.
2268 Put them into VEC from back to front, then take out from front. */
2270 for (i
= 0, decl
= globals
; i
< len
; i
++, decl
= TREE_CHAIN (decl
))
2271 vec
[len
- i
- 1] = decl
;
2273 for (i
= 0; i
< len
; i
++)
2276 if (TREE_CODE (decl
) == VAR_DECL
&& DECL_SIZE (decl
) == 0
2277 && incomplete_decl_finalize_hook
!= 0)
2278 (*incomplete_decl_finalize_hook
) (decl
);
2280 if (TREE_CODE (decl
) == VAR_DECL
&& TREE_STATIC (decl
)
2281 && ! TREE_ASM_WRITTEN (decl
))
2283 /* Don't write out static consts, unless we still need them.
2285 We also keep static consts if not optimizing (for debugging).
2286 ??? They might be better written into the debug information.
2287 This is possible when using DWARF.
2289 A language processor that wants static constants to be always
2290 written out (even if it is not used) is responsible for
2291 calling rest_of_decl_compilation itself. E.g. the C front-end
2292 calls rest_of_decl_compilation from finish_decl.
2293 One motivation for this is that is conventional in some
2294 environments to write things like:
2295 static const char rcsid[] = "... version string ...";
2296 intending to force the string to be in the executable.
2298 A language processor that would prefer to have unneeded
2299 static constants "optimized away" would just defer writing
2300 them out until here. E.g. C++ does this, because static
2301 constants are often defined in header files.
2303 ??? A tempting alternative (for both C and C++) would be
2304 to force a constant to be written if and only if it is
2305 defined in a main file, as opposed to an include file. */
2307 if (! TREE_READONLY (decl
)
2308 || TREE_PUBLIC (decl
)
2310 || TREE_ADDRESSABLE (decl
)
2311 || TREE_ADDRESSABLE (DECL_ASSEMBLER_NAME (decl
)))
2312 rest_of_decl_compilation (decl
, NULL_PTR
, 1, 1);
2314 /* Cancel the RTL for this decl so that, if debugging info
2315 output for global variables is still to come,
2316 this one will be omitted. */
2317 DECL_RTL (decl
) = NULL
;
2320 if (TREE_CODE (decl
) == FUNCTION_DECL
2321 && ! TREE_ASM_WRITTEN (decl
)
2322 && DECL_INITIAL (decl
) != 0
2323 && (TREE_ADDRESSABLE (decl
)
2324 || TREE_ADDRESSABLE (DECL_ASSEMBLER_NAME (decl
)))
2325 && ! DECL_EXTERNAL (decl
))
2327 temporary_allocation ();
2328 output_inline_function (decl
);
2329 permanent_allocation (1);
2332 /* Warn about any function
2333 declared static but not defined.
2334 We don't warn about variables,
2335 because many programs have static variables
2336 that exist only to get some text into the object file. */
2339 || (DECL_NAME (decl
) && TREE_USED (DECL_NAME (decl
))))
2340 && TREE_CODE (decl
) == FUNCTION_DECL
2341 && DECL_INITIAL (decl
) == 0
2342 && DECL_EXTERNAL (decl
)
2343 && ! TREE_PUBLIC (decl
))
2345 /* This should be a pedwarn, except that there is
2346 no easy way to prevent it from happening when the
2347 name is used only inside a sizeof.
2348 This at least avoids being incorrect. */
2349 warning_with_decl (decl
,
2350 "`%s' declared `static' but never defined");
2351 /* This symbol is effectively an "extern" declaration now. */
2352 TREE_PUBLIC (decl
) = 1;
2353 assemble_external (decl
);
2356 /* Warn about static fns or vars defined but not used,
2357 but not about inline functions or static consts
2358 since defining those in header files is normal practice. */
2360 && ((TREE_CODE (decl
) == FUNCTION_DECL
&& ! DECL_INLINE (decl
))
2361 || (TREE_CODE (decl
) == VAR_DECL
&& ! TREE_READONLY (decl
)))
2362 && ! DECL_IN_SYSTEM_HEADER (decl
)
2363 && ! DECL_EXTERNAL (decl
)
2364 && ! TREE_PUBLIC (decl
)
2365 && ! TREE_USED (decl
)
2366 && ! DECL_REGISTER (decl
)
2367 /* The TREE_USED bit for file-scope decls
2368 is kept in the identifier, to handle multiple
2369 external decls in different scopes. */
2370 && ! TREE_USED (DECL_NAME (decl
)))
2371 warning_with_decl (decl
, "`%s' defined but not used");
2373 #ifdef SDB_DEBUGGING_INFO
2374 /* The COFF linker can move initialized global vars to the end.
2375 And that can screw up the symbol ordering.
2376 By putting the symbols in that order to begin with,
2377 we avoid a problem. mcsun!unido!fauern!tumuc!pes@uunet.uu.net. */
2378 if (write_symbols
== SDB_DEBUG
&& TREE_CODE (decl
) == VAR_DECL
2379 && TREE_PUBLIC (decl
) && DECL_INITIAL (decl
)
2380 && ! DECL_EXTERNAL (decl
)
2381 && DECL_RTL (decl
) != 0)
2382 TIMEVAR (symout_time
, sdbout_symbol (decl
, 0));
2384 /* Output COFF information for non-global
2385 file-scope initialized variables. */
2386 if (write_symbols
== SDB_DEBUG
2387 && TREE_CODE (decl
) == VAR_DECL
2388 && DECL_INITIAL (decl
)
2389 && ! DECL_EXTERNAL (decl
)
2390 && DECL_RTL (decl
) != 0
2391 && GET_CODE (DECL_RTL (decl
)) == MEM
)
2392 TIMEVAR (symout_time
, sdbout_toplevel_data (decl
));
2393 #endif /* SDB_DEBUGGING_INFO */
2394 #ifdef DWARF_DEBUGGING_INFO
2395 /* Output DWARF information for file-scope tentative data object
2396 declarations, file-scope (extern) function declarations (which
2397 had no corresponding body) and file-scope tagged type declarations
2398 and definitions which have not yet been forced out. */
2400 if (write_symbols
== DWARF_DEBUG
2401 && (TREE_CODE (decl
) != FUNCTION_DECL
|| !DECL_INITIAL (decl
)))
2402 TIMEVAR (symout_time
, dwarfout_file_scope_decl (decl
, 1));
2407 /* Do dbx symbols */
2408 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
2409 if (write_symbols
== DBX_DEBUG
|| write_symbols
== XCOFF_DEBUG
)
2410 TIMEVAR (symout_time
,
2412 dbxout_finish (asm_out_file
, main_input_filename
);
2416 #ifdef DWARF_DEBUGGING_INFO
2417 if (write_symbols
== DWARF_DEBUG
)
2418 TIMEVAR (symout_time
,
2424 /* Output some stuff at end of file if nec. */
2426 if (!output_bytecode
)
2428 end_final (main_input_filename
);
2431 ASM_FILE_END (asm_out_file
);
2435 /* Language-specific end of compilation actions. */
2439 if (output_bytecode
)
2440 bc_write_file (asm_out_file
);
2442 /* Close the dump files. */
2444 if (flag_gen_aux_info
)
2446 fclose (aux_info_file
);
2448 unlink (aux_info_file_name
);
2452 fclose (rtl_dump_file
);
2455 fclose (jump_opt_dump_file
);
2458 fclose (cse_dump_file
);
2461 fclose (loop_dump_file
);
2464 fclose (cse2_dump_file
);
2467 fclose (flow_dump_file
);
2471 dump_combine_total_stats (combine_dump_file
);
2472 fclose (combine_dump_file
);
2476 fclose (sched_dump_file
);
2479 fclose (local_reg_dump_file
);
2481 if (global_reg_dump
)
2482 fclose (global_reg_dump_file
);
2485 fclose (sched2_dump_file
);
2488 fclose (jump2_opt_dump_file
);
2491 fclose (dbr_sched_dump_file
);
2495 fclose (stack_reg_dump_file
);
2498 /* Close non-debugging input and output files. Take special care to note
2499 whether fclose returns an error, since the pages might still be on the
2500 buffer chain while the file is open. */
2503 if (ferror (asm_out_file
) != 0 || fclose (asm_out_file
) != 0)
2504 fatal_io_error (asm_file_name
);
2506 /* Print the times. */
2510 fprintf (stderr
,"\n");
2511 print_time ("parse", parse_time
);
2513 if (!output_bytecode
)
2515 print_time ("integration", integration_time
);
2516 print_time ("jump", jump_time
);
2517 print_time ("cse", cse_time
);
2518 print_time ("loop", loop_time
);
2519 print_time ("cse2", cse2_time
);
2520 print_time ("flow", flow_time
);
2521 print_time ("combine", combine_time
);
2522 print_time ("sched", sched_time
);
2523 print_time ("local-alloc", local_alloc_time
);
2524 print_time ("global-alloc", global_alloc_time
);
2525 print_time ("sched2", sched2_time
);
2526 print_time ("dbranch", dbr_sched_time
);
2527 print_time ("shorten-branch", shorten_branch_time
);
2528 print_time ("stack-reg", stack_reg_time
);
2529 print_time ("final", final_time
);
2530 print_time ("varconst", varconst_time
);
2531 print_time ("symout", symout_time
);
2532 print_time ("dump", dump_time
);
2537 /* This is called from various places for FUNCTION_DECL, VAR_DECL,
2538 and TYPE_DECL nodes.
2540 This does nothing for local (non-static) variables.
2541 Otherwise, it sets up the RTL and outputs any assembler code
2542 (label definition, storage allocation and initialization).
2544 DECL is the declaration. If ASMSPEC is nonzero, it specifies
2545 the assembler symbol name to be used. TOP_LEVEL is nonzero
2546 if this declaration is not within a function. */
2549 rest_of_decl_compilation (decl
, asmspec
, top_level
, at_end
)
2555 /* Declarations of variables, and of functions defined elsewhere. */
2557 /* The most obvious approach, to put an #ifndef around where
2558 this macro is used, doesn't work since it's inside a macro call. */
2559 #ifndef ASM_FINISH_DECLARE_OBJECT
2560 #define ASM_FINISH_DECLARE_OBJECT(FILE, DECL, TOP, END)
2563 /* Forward declarations for nested functions are not "external",
2564 but we need to treat them as if they were. */
2565 if (TREE_STATIC (decl
) || DECL_EXTERNAL (decl
)
2566 || TREE_CODE (decl
) == FUNCTION_DECL
)
2567 TIMEVAR (varconst_time
,
2569 make_decl_rtl (decl
, asmspec
, top_level
);
2570 /* Initialized extern variable exists to be replaced
2571 with its value, or represents something that will be
2572 output in another file. */
2573 if (! (TREE_CODE (decl
) == VAR_DECL
2574 && DECL_EXTERNAL (decl
) && TREE_READONLY (decl
)
2575 && DECL_INITIAL (decl
) != 0
2576 && DECL_INITIAL (decl
) != error_mark_node
))
2577 /* Don't output anything
2578 when a tentative file-scope definition is seen.
2579 But at end of compilation, do output code for them. */
2580 if (! (! at_end
&& top_level
2581 && (DECL_INITIAL (decl
) == 0
2582 || DECL_INITIAL (decl
) == error_mark_node
)))
2583 assemble_variable (decl
, top_level
, at_end
, 0);
2584 if (decl
== last_assemble_variable_decl
)
2586 ASM_FINISH_DECLARE_OBJECT (asm_out_file
, decl
,
2590 else if (DECL_REGISTER (decl
) && asmspec
!= 0)
2592 if (decode_reg_name (asmspec
) >= 0)
2594 DECL_RTL (decl
) = 0;
2595 make_decl_rtl (decl
, asmspec
, top_level
);
2598 error ("invalid register name `%s' for register variable", asmspec
);
2600 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
2601 else if ((write_symbols
== DBX_DEBUG
|| write_symbols
== XCOFF_DEBUG
)
2602 && TREE_CODE (decl
) == TYPE_DECL
)
2603 TIMEVAR (symout_time
, dbxout_symbol (decl
, 0));
2605 #ifdef SDB_DEBUGGING_INFO
2606 else if (write_symbols
== SDB_DEBUG
&& top_level
2607 && TREE_CODE (decl
) == TYPE_DECL
)
2608 TIMEVAR (symout_time
, sdbout_symbol (decl
, 0));
2612 /* Called after finishing a record, union or enumeral type. */
2615 rest_of_type_compilation (type
, toplev
)
2619 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
2620 if (write_symbols
== DBX_DEBUG
|| write_symbols
== XCOFF_DEBUG
)
2621 TIMEVAR (symout_time
, dbxout_symbol (TYPE_STUB_DECL (type
), !toplev
));
2623 #ifdef SDB_DEBUGGING_INFO
2624 if (write_symbols
== SDB_DEBUG
)
2625 TIMEVAR (symout_time
, sdbout_symbol (TYPE_STUB_DECL (type
), !toplev
));
2629 /* This is called from finish_function (within yyparse)
2630 after each top-level definition is parsed.
2631 It is supposed to compile that function or variable
2632 and output the assembler code for it.
2633 After we return, the tree storage is freed. */
2636 rest_of_compilation (decl
)
2640 int start_time
= get_run_time ();
2642 /* Nonzero if we have saved the original DECL_INITIAL of the function,
2643 to be restored after we finish compiling the function
2644 (for use when compiling inline calls to this function). */
2645 tree saved_block_tree
= 0;
2646 /* Likewise, for DECL_ARGUMENTS. */
2647 tree saved_arguments
= 0;
2650 if (output_bytecode
)
2653 /* If we are reconsidering an inline function
2654 at the end of compilation, skip the stuff for making it inline. */
2656 if (DECL_SAVED_INSNS (decl
) == 0)
2658 int specd
= DECL_INLINE (decl
);
2661 /* If requested, consider whether to make this function inline. */
2662 if (specd
|| flag_inline_functions
)
2663 TIMEVAR (integration_time
,
2665 lose
= function_cannot_inline_p (decl
);
2666 /* If not optimzing, then make sure the DECL_INLINE
2668 if (lose
|| ! optimize
)
2670 if (warn_inline
&& specd
)
2671 warning_with_decl (decl
, lose
);
2672 DECL_INLINE (decl
) = 0;
2673 /* Don't really compile an extern inline function.
2674 If we can't make it inline, pretend
2675 it was only declared. */
2676 if (DECL_EXTERNAL (decl
))
2678 DECL_INITIAL (decl
) = 0;
2679 goto exit_rest_of_compilation
;
2683 DECL_INLINE (decl
) = 1;
2686 insns
= get_insns ();
2688 /* Dump the rtl code if we are dumping rtl. */
2693 fprintf (rtl_dump_file
, "\n;; Function %s\n\n",
2694 IDENTIFIER_POINTER (DECL_NAME (decl
)));
2695 if (DECL_SAVED_INSNS (decl
))
2696 fprintf (rtl_dump_file
, ";; (integrable)\n\n");
2697 print_rtl (rtl_dump_file
, insns
);
2698 fflush (rtl_dump_file
);
2701 /* If function is inline, and we don't yet know whether to
2702 compile it by itself, defer decision till end of compilation.
2703 finish_compilation will call rest_of_compilation again
2704 for those functions that need to be output. Also defer those
2705 functions that were marked inline but weren't inlined; they
2706 may never be used. */
2708 if ((specd
|| DECL_INLINE (decl
))
2709 && ((! TREE_PUBLIC (decl
) && ! TREE_ADDRESSABLE (decl
)
2710 && ! flag_keep_inline_functions
)
2711 || DECL_EXTERNAL (decl
)))
2713 #ifdef DWARF_DEBUGGING_INFO
2714 /* Generate the DWARF info for the "abstract" instance
2715 of a function which we may later generate inlined and/or
2716 out-of-line instances of. */
2717 if (write_symbols
== DWARF_DEBUG
)
2719 set_decl_abstract_flags (decl
, 1);
2720 TIMEVAR (symout_time
, dwarfout_file_scope_decl (decl
, 0));
2721 set_decl_abstract_flags (decl
, 0);
2724 TIMEVAR (integration_time
, save_for_inline_nocopy (decl
));
2725 goto exit_rest_of_compilation
;
2728 /* If we have to compile the function now, save its rtl and subdecls
2729 so that its compilation will not affect what others get. */
2730 if (DECL_INLINE (decl
))
2732 #ifdef DWARF_DEBUGGING_INFO
2733 /* Generate the DWARF info for the "abstract" instance of
2734 a function which we will generate an out-of-line instance
2735 of almost immediately (and which we may also later generate
2736 various inlined instances of). */
2737 if (write_symbols
== DWARF_DEBUG
)
2739 set_decl_abstract_flags (decl
, 1);
2740 TIMEVAR (symout_time
, dwarfout_file_scope_decl (decl
, 0));
2741 set_decl_abstract_flags (decl
, 0);
2744 saved_block_tree
= DECL_INITIAL (decl
);
2745 saved_arguments
= DECL_ARGUMENTS (decl
);
2746 TIMEVAR (integration_time
, save_for_inline_copying (decl
));
2750 TREE_ASM_WRITTEN (decl
) = 1;
2752 /* Now that integrate will no longer see our rtl, we need not distinguish
2753 between the return value of this function and the return value of called
2755 rtx_equal_function_value_matters
= 0;
2757 /* Don't return yet if -Wreturn-type; we need to do jump_optimize. */
2758 if ((rtl_dump_and_exit
|| flag_syntax_only
) && !warn_return_type
)
2760 goto exit_rest_of_compilation
;
2763 /* From now on, allocate rtl in current_obstack, not in saveable_obstack.
2764 Note that that may have been done above, in save_for_inline_copying.
2765 The call to resume_temporary_allocation near the end of this function
2766 goes back to the usual state of affairs. */
2768 rtl_in_current_obstack ();
2771 /* If we are doing position-independent code generation, now
2772 is the time to output special prologues and epilogues.
2773 We do not want to do this earlier, because it just clutters
2774 up inline functions with meaningless insns. */
2779 insns
= get_insns ();
2781 /* Copy any shared structure that should not be shared. */
2783 unshare_all_rtl (insns
);
2785 /* Instantiate all virtual registers. */
2787 instantiate_virtual_regs (current_function_decl
, get_insns ());
2789 /* See if we have allocated stack slots that are not directly addressable.
2790 If so, scan all the insns and create explicit address computation
2791 for all references to such slots. */
2792 /* fixup_stack_slots (); */
2794 /* Do jump optimization the first time, if -opt.
2795 Also do it if -W, but in that case it doesn't change the rtl code,
2796 it only computes whether control can drop off the end of the function. */
2798 if (optimize
> 0 || extra_warnings
|| warn_return_type
2799 /* If function is `noreturn', we should warn if it tries to return. */
2800 || TREE_THIS_VOLATILE (decl
))
2802 TIMEVAR (jump_time
, reg_scan (insns
, max_reg_num (), 0));
2803 TIMEVAR (jump_time
, jump_optimize (insns
, 0, 0, 1));
2806 /* Now is when we stop if -fsyntax-only and -Wreturn-type. */
2807 if (rtl_dump_and_exit
|| flag_syntax_only
)
2808 goto exit_rest_of_compilation
;
2810 /* Dump rtl code after jump, if we are doing that. */
2815 fprintf (jump_opt_dump_file
, "\n;; Function %s\n\n",
2816 IDENTIFIER_POINTER (DECL_NAME (decl
)));
2817 print_rtl (jump_opt_dump_file
, insns
);
2818 fflush (jump_opt_dump_file
);
2821 /* Perform common subexpression elimination.
2822 Nonzero value from `cse_main' means that jumps were simplified
2823 and some code may now be unreachable, so do
2824 jump optimization again. */
2829 fprintf (cse_dump_file
, "\n;; Function %s\n\n",
2830 IDENTIFIER_POINTER (DECL_NAME (decl
)));
2835 TIMEVAR (cse_time
, reg_scan (insns
, max_reg_num (), 1));
2837 if (flag_thread_jumps
)
2838 /* Hacks by tiemann & kenner. */
2839 TIMEVAR (jump_time
, thread_jumps (insns
, max_reg_num (), 1));
2841 TIMEVAR (cse_time
, tem
= cse_main (insns
, max_reg_num (),
2843 TIMEVAR (cse_time
, delete_dead_from_cse (insns
, max_reg_num ()));
2846 TIMEVAR (jump_time
, jump_optimize (insns
, 0, 0, 0));
2849 /* Dump rtl code after cse, if we are doing that. */
2854 print_rtl (cse_dump_file
, insns
);
2855 fflush (cse_dump_file
);
2861 fprintf (loop_dump_file
, "\n;; Function %s\n\n",
2862 IDENTIFIER_POINTER (DECL_NAME (decl
)));
2865 /* Move constant computations out of loops. */
2871 loop_optimize (insns
, loop_dump_file
);
2875 /* Dump rtl code after loop opt, if we are doing that. */
2880 print_rtl (loop_dump_file
, insns
);
2881 fflush (loop_dump_file
);
2887 fprintf (cse2_dump_file
, "\n;; Function %s\n\n",
2888 IDENTIFIER_POINTER (DECL_NAME (decl
)));
2891 if (optimize
> 0 && flag_rerun_cse_after_loop
)
2893 /* Running another jump optimization pass before the second
2894 cse pass sometimes simplifies the RTL enough to allow
2895 the second CSE pass to do a better job. Jump_optimize can change
2896 max_reg_num so we must rerun reg_scan afterwards.
2897 ??? Rework to not call reg_scan so often. */
2898 TIMEVAR (jump_time
, reg_scan (insns
, max_reg_num (), 0));
2899 TIMEVAR (jump_time
, jump_optimize (insns
, 0, 0, 1));
2901 TIMEVAR (cse2_time
, reg_scan (insns
, max_reg_num (), 0));
2902 TIMEVAR (cse2_time
, tem
= cse_main (insns
, max_reg_num (),
2903 1, cse2_dump_file
));
2905 TIMEVAR (jump_time
, jump_optimize (insns
, 0, 0, 0));
2908 if (optimize
> 0 && flag_thread_jumps
)
2909 /* This pass of jump threading straightens out code
2910 that was kinked by loop optimization. */
2911 TIMEVAR (jump_time
, thread_jumps (insns
, max_reg_num (), 0));
2913 /* Dump rtl code after cse, if we are doing that. */
2918 print_rtl (cse2_dump_file
, insns
);
2919 fflush (cse2_dump_file
);
2922 /* We are no longer anticipating cse in this function, at least. */
2924 cse_not_expected
= 1;
2926 /* Now we choose between stupid (pcc-like) register allocation
2927 (if we got the -noreg switch and not -opt)
2928 and smart register allocation. */
2930 if (optimize
> 0) /* Stupid allocation probably won't work */
2931 obey_regdecls
= 0; /* if optimizations being done. */
2935 /* Print function header into flow dump now
2936 because doing the flow analysis makes some of the dump. */
2941 fprintf (flow_dump_file
, "\n;; Function %s\n\n",
2942 IDENTIFIER_POINTER (DECL_NAME (decl
)));
2949 regclass (insns
, max_reg_num ());
2950 stupid_life_analysis (insns
, max_reg_num (),
2956 /* Do control and data flow analysis,
2957 and write some of the results to dump file. */
2959 TIMEVAR (flow_time
, flow_analysis (insns
, max_reg_num (),
2961 if (warn_uninitialized
)
2963 uninitialized_vars_warning (DECL_INITIAL (decl
));
2964 setjmp_args_warning ();
2968 /* Dump rtl after flow analysis. */
2973 print_rtl (flow_dump_file
, insns
);
2974 fflush (flow_dump_file
);
2977 /* If -opt, try combining insns through substitution. */
2980 TIMEVAR (combine_time
, combine_instructions (insns
, max_reg_num ()));
2982 /* Dump rtl code after insn combination. */
2987 fprintf (combine_dump_file
, "\n;; Function %s\n\n",
2988 IDENTIFIER_POINTER (DECL_NAME (decl
)));
2989 dump_combine_stats (combine_dump_file
);
2990 print_rtl (combine_dump_file
, insns
);
2991 fflush (combine_dump_file
);
2994 /* Print function header into sched dump now
2995 because doing the sched analysis makes some of the dump. */
3000 fprintf (sched_dump_file
, "\n;; Function %s\n\n",
3001 IDENTIFIER_POINTER (DECL_NAME (decl
)));
3004 if (optimize
> 0 && flag_schedule_insns
)
3006 /* Do control and data sched analysis,
3007 and write some of the results to dump file. */
3009 TIMEVAR (sched_time
, schedule_insns (sched_dump_file
));
3012 /* Dump rtl after instruction scheduling. */
3017 print_rtl (sched_dump_file
, insns
);
3018 fflush (sched_dump_file
);
3021 /* Unless we did stupid register allocation,
3022 allocate pseudo-regs that are used only within 1 basic block. */
3025 TIMEVAR (local_alloc_time
,
3027 regclass (insns
, max_reg_num ());
3031 /* Dump rtl code after allocating regs within basic blocks. */
3036 fprintf (local_reg_dump_file
, "\n;; Function %s\n\n",
3037 IDENTIFIER_POINTER (DECL_NAME (decl
)));
3038 dump_flow_info (local_reg_dump_file
);
3039 dump_local_alloc (local_reg_dump_file
);
3040 print_rtl (local_reg_dump_file
, insns
);
3041 fflush (local_reg_dump_file
);
3044 if (global_reg_dump
)
3046 fprintf (global_reg_dump_file
, "\n;; Function %s\n\n",
3047 IDENTIFIER_POINTER (DECL_NAME (decl
))));
3049 /* Unless we did stupid register allocation,
3050 allocate remaining pseudo-regs, then do the reload pass
3051 fixing up any insns that are invalid. */
3053 TIMEVAR (global_alloc_time
,
3056 failure
= global_alloc (global_reg_dump_file
);
3058 failure
= reload (insns
, 0, global_reg_dump_file
);
3061 if (global_reg_dump
)
3064 dump_global_regs (global_reg_dump_file
);
3065 print_rtl (global_reg_dump_file
, insns
);
3066 fflush (global_reg_dump_file
);
3070 goto exit_rest_of_compilation
;
3072 reload_completed
= 1;
3074 /* On some machines, the prologue and epilogue code, or parts thereof,
3075 can be represented as RTL. Doing so lets us schedule insns between
3076 it and the rest of the code and also allows delayed branch
3077 scheduling to operate in the epilogue. */
3079 thread_prologue_and_epilogue_insns (insns
);
3081 if (optimize
> 0 && flag_schedule_insns_after_reload
)
3086 fprintf (sched2_dump_file
, "\n;; Function %s\n\n",
3087 IDENTIFIER_POINTER (DECL_NAME (decl
)));
3090 /* Do control and data sched analysis again,
3091 and write some more of the results to dump file. */
3093 TIMEVAR (sched2_time
, schedule_insns (sched2_dump_file
));
3095 /* Dump rtl after post-reorder instruction scheduling. */
3100 print_rtl (sched2_dump_file
, insns
);
3101 fflush (sched2_dump_file
);
3105 #ifdef LEAF_REGISTERS
3107 if (optimize
> 0 && only_leaf_regs_used () && leaf_function_p ())
3111 /* One more attempt to remove jumps to .+1
3112 left by dead-store-elimination.
3113 Also do cross-jumping this time
3114 and delete no-op move insns. */
3118 TIMEVAR (jump_time
, jump_optimize (insns
, 1, 1, 0));
3121 /* Dump rtl code after jump, if we are doing that. */
3126 fprintf (jump2_opt_dump_file
, "\n;; Function %s\n\n",
3127 IDENTIFIER_POINTER (DECL_NAME (decl
)));
3128 print_rtl (jump2_opt_dump_file
, insns
);
3129 fflush (jump2_opt_dump_file
);
3132 /* If a machine dependent reorganization is needed, call it. */
3133 #ifdef MACHINE_DEPENDENT_REORG
3134 MACHINE_DEPENDENT_REORG (insns
);
3137 /* If a scheduling pass for delayed branches is to be done,
3138 call the scheduling code. */
3141 if (optimize
> 0 && flag_delayed_branch
)
3143 TIMEVAR (dbr_sched_time
, dbr_schedule (insns
, dbr_sched_dump_file
));
3148 fprintf (dbr_sched_dump_file
, "\n;; Function %s\n\n",
3149 IDENTIFIER_POINTER (DECL_NAME (decl
)));
3150 print_rtl (dbr_sched_dump_file
, insns
);
3151 fflush (dbr_sched_dump_file
);
3158 /* Shorten branches. */
3159 TIMEVAR (shorten_branch_time
,
3161 shorten_branches (get_insns ());
3165 TIMEVAR (stack_reg_time
, reg_to_stack (insns
, stack_reg_dump_file
));
3170 fprintf (stack_reg_dump_file
, "\n;; Function %s\n\n",
3171 IDENTIFIER_POINTER (DECL_NAME (decl
)));
3172 print_rtl (stack_reg_dump_file
, insns
);
3173 fflush (stack_reg_dump_file
);
3178 /* Now turn the rtl into assembler code. */
3180 TIMEVAR (final_time
,
3185 /* Get the function's name, as described by its RTL.
3186 This may be different from the DECL_NAME name used
3187 in the source file. */
3189 x
= DECL_RTL (decl
);
3190 if (GET_CODE (x
) != MEM
)
3193 if (GET_CODE (x
) != SYMBOL_REF
)
3195 fnname
= XSTR (x
, 0);
3197 assemble_start_function (decl
, fnname
);
3198 final_start_function (insns
, asm_out_file
, optimize
);
3199 final (insns
, asm_out_file
, optimize
, 0);
3200 final_end_function (insns
, asm_out_file
, optimize
);
3201 assemble_end_function (decl
, fnname
);
3202 fflush (asm_out_file
);
3205 /* Write DBX symbols if requested */
3207 /* Note that for those inline functions where we don't initially
3208 know for certain that we will be generating an out-of-line copy,
3209 the first invocation of this routine (rest_of_compilation) will
3210 skip over this code by doing a `goto exit_rest_of_compilation;'.
3211 Later on, finish_compilation will call rest_of_compilation again
3212 for those inline functions that need to have out-of-line copies
3213 generated. During that call, we *will* be routed past here. */
3215 #ifdef DBX_DEBUGGING_INFO
3216 if (write_symbols
== DBX_DEBUG
)
3217 TIMEVAR (symout_time
, dbxout_function (decl
));
3220 #ifdef DWARF_DEBUGGING_INFO
3221 if (write_symbols
== DWARF_DEBUG
)
3222 TIMEVAR (symout_time
, dwarfout_file_scope_decl (decl
, 0));
3225 exit_rest_of_compilation
:
3227 /* In case the function was not output,
3228 don't leave any temporary anonymous types
3229 queued up for sdb output. */
3230 #ifdef SDB_DEBUGGING_INFO
3231 if (write_symbols
== SDB_DEBUG
)
3232 sdbout_types (NULL_TREE
);
3235 /* Put back the tree of subblocks and list of arguments
3236 from before we copied them.
3237 Code generation and the output of debugging info may have modified
3238 the copy, but the original is unchanged. */
3240 if (saved_block_tree
!= 0)
3241 DECL_INITIAL (decl
) = saved_block_tree
;
3242 if (saved_arguments
!= 0)
3243 DECL_ARGUMENTS (decl
) = saved_arguments
;
3245 reload_completed
= 0;
3247 /* Clear out the real_constant_chain before some of the rtx's
3248 it runs through become garbage. */
3250 clear_const_double_mem ();
3252 /* Cancel the effect of rtl_in_current_obstack. */
3254 resume_temporary_allocation ();
3256 /* The parsing time is all the time spent in yyparse
3257 *except* what is spent in this function. */
3259 parse_time
-= get_run_time () - start_time
;
3262 /* Entry point of cc1/c++. Decode command args, then call compile_file.
3263 Exit code is 35 if can't open files, 34 if fatal error,
3264 33 if had nonfatal errors, else success. */
3267 main (argc
, argv
, envp
)
3274 int flag_print_mem
= 0;
3275 int version_flag
= 0;
3278 /* save in case md file wants to emit args as a comment. */
3282 p
= argv
[0] + strlen (argv
[0]);
3283 while (p
!= argv
[0] && p
[-1] != '/') --p
;
3287 /* Get rid of any avoidable limit on stack size. */
3291 /* Set the stack limit huge so that alloca does not fail. */
3292 getrlimit (RLIMIT_STACK
, &rlim
);
3293 rlim
.rlim_cur
= rlim
.rlim_max
;
3294 setrlimit (RLIMIT_STACK
, &rlim
);
3296 #endif /* RLIMIT_STACK */
3298 signal (SIGFPE
, float_signal
);
3301 signal (SIGPIPE
, pipe_closed
);
3304 decl_printable_name
= decl_name
;
3305 lang_expand_expr
= (struct rtx_def
*(*)()) do_abort
;
3307 /* Initialize whether `char' is signed. */
3308 flag_signed_char
= DEFAULT_SIGNED_CHAR
;
3309 #ifdef DEFAULT_SHORT_ENUMS
3310 /* Initialize how much space enums occupy, by default. */
3311 flag_short_enums
= DEFAULT_SHORT_ENUMS
;
3314 /* Scan to see what optimization level has been specified. That will
3315 determine the default value of many flags. */
3316 for (i
= 1; i
< argc
; i
++)
3318 if (!strcmp (argv
[i
], "-O"))
3322 else if (argv
[i
][0] == '-' && argv
[i
][1] == 'O')
3324 /* Handle -O2, -O3, -O69, ... */
3325 char *p
= &argv
[i
][2];
3329 if (! (c
>= '0' && c
<= '9'))
3332 optimize
= atoi (&argv
[i
][2]);
3336 obey_regdecls
= (optimize
== 0);
3346 flag_thread_jumps
= 1;
3348 flag_delayed_branch
= 1;
3350 #ifdef CAN_DEBUG_WITHOUT_FP
3351 flag_omit_frame_pointer
= 1;
3357 flag_cse_follow_jumps
= 1;
3358 flag_cse_skip_blocks
= 1;
3359 flag_expensive_optimizations
= 1;
3360 flag_strength_reduce
= 1;
3361 flag_rerun_cse_after_loop
= 1;
3362 flag_caller_saves
= 1;
3363 #ifdef INSN_SCHEDULING
3364 flag_schedule_insns
= 1;
3365 flag_schedule_insns_after_reload
= 1;
3371 flag_inline_functions
= 1;
3374 #ifdef OPTIMIZATION_OPTIONS
3375 /* Allow default optimizations to be specified on a per-machine basis. */
3376 OPTIMIZATION_OPTIONS (optimize
);
3379 /* Initialize register usage now so switches may override. */
3383 set_target_switch ("");
3385 for (i
= 1; i
< argc
; i
++)
3388 /* If this is a language-specific option,
3389 decode it in a language-specific way. */
3390 for (j
= 0; lang_options
[j
] != 0; j
++)
3391 if (!strncmp (argv
[i
], lang_options
[j
],
3392 strlen (lang_options
[j
])))
3394 if (lang_options
[j
] != 0)
3395 /* If the option is valid for *some* language,
3396 treat it as valid even if this language doesn't understand it. */
3397 lang_decode_option (argv
[i
]);
3398 else if (argv
[i
][0] == '-' && argv
[i
][1] != 0)
3400 register char *str
= argv
[i
] + 1;
3405 set_target_switch (&str
[1]);
3406 else if (!strcmp (str
, "dumpbase"))
3408 dump_base_name
= argv
[++i
];
3410 else if (str
[0] == 'd')
3412 register char *p
= &str
[1];
3420 global_reg_dump
= 1;
3426 cse_dump
= 1, cse2_dump
= 1;
3444 global_reg_dump
= 1;
3462 flag_print_asm_name
= 1;
3484 rtl_dump_and_exit
= 1;
3488 else if (str
[0] == 'f')
3490 register char *p
= &str
[1];
3493 /* Some kind of -f option.
3494 P's value is the option sans `-f'.
3495 Search for it in the table of options. */
3498 !found
&& j
< sizeof (f_options
) / sizeof (f_options
[0]);
3501 if (!strcmp (p
, f_options
[j
].string
))
3503 *f_options
[j
].variable
= f_options
[j
].on_value
;
3504 /* A goto here would be cleaner,
3505 but breaks the vax pcc. */
3508 if (p
[0] == 'n' && p
[1] == 'o' && p
[2] == '-'
3509 && ! strcmp (p
+3, f_options
[j
].string
))
3511 *f_options
[j
].variable
= ! f_options
[j
].on_value
;
3518 else if (!strncmp (p
, "fixed-", 6))
3519 fix_register (&p
[6], 1, 1);
3520 else if (!strncmp (p
, "call-used-", 10))
3521 fix_register (&p
[10], 0, 1);
3522 else if (!strncmp (p
, "call-saved-", 11))
3523 fix_register (&p
[11], 0, 0);
3525 error ("Invalid option `%s'", argv
[i
]);
3527 else if (str
[0] == 'O')
3529 register char *p
= str
+1;
3530 while (*p
&& *p
>= '0' && *p
<= '9')
3535 error ("Invalid option `%s'", argv
[i
]);
3537 else if (!strcmp (str
, "pedantic"))
3539 else if (!strcmp (str
, "pedantic-errors"))
3540 flag_pedantic_errors
= pedantic
= 1;
3541 else if (!strcmp (str
, "quiet"))
3543 else if (!strcmp (str
, "version"))
3545 else if (!strcmp (str
, "w"))
3546 inhibit_warnings
= 1;
3547 else if (!strcmp (str
, "W"))
3550 /* We save the value of warn_uninitialized, since if they put
3551 -Wuninitialized on the command line, we need to generate a
3552 warning about not using it without also specifying -O. */
3553 if (warn_uninitialized
!= 1)
3554 warn_uninitialized
= 2;
3556 else if (str
[0] == 'W')
3558 register char *p
= &str
[1];
3561 /* Some kind of -W option.
3562 P's value is the option sans `-W'.
3563 Search for it in the table of options. */
3566 !found
&& j
< sizeof (W_options
) / sizeof (W_options
[0]);
3569 if (!strcmp (p
, W_options
[j
].string
))
3571 *W_options
[j
].variable
= W_options
[j
].on_value
;
3572 /* A goto here would be cleaner,
3573 but breaks the vax pcc. */
3576 if (p
[0] == 'n' && p
[1] == 'o' && p
[2] == '-'
3577 && ! strcmp (p
+3, W_options
[j
].string
))
3579 *W_options
[j
].variable
= ! W_options
[j
].on_value
;
3586 else if (!strncmp (p
, "id-clash-", 9))
3592 if (*endp
>= '0' && *endp
<= '9')
3596 error ("Invalid option `%s'", argv
[i
]);
3601 id_clash_len
= atoi (str
+ 10);
3604 else if (!strncmp (p
, "larger-than-", 12))
3606 char *endp
= p
+ 12;
3610 if (*endp
>= '0' && *endp
<= '9')
3614 error ("Invalid option `%s'", argv
[i
]);
3615 goto larger_than_lose
;
3618 warn_larger_than
= 1;
3619 larger_than_size
= atoi (str
+ 13);
3623 error ("Invalid option `%s'", argv
[i
]);
3625 else if (!strcmp (str
, "p"))
3627 if (!output_bytecode
)
3630 error ("profiling not supported in bytecode compilation");
3632 else if (!strcmp (str
, "a"))
3634 #if !defined (BLOCK_PROFILER) || !defined (FUNCTION_BLOCK_PROFILER)
3635 warning ("`-a' option (basic block profile) not supported");
3637 profile_block_flag
= 1;
3640 else if (str
[0] == 'g')
3647 while (*p
&& (*p
< '0' || *p
> '9'))
3651 while (*q
&& (*q
>= '0' && *q
<= '9'))
3656 level
= 2; /* default debugging info level */
3657 if (*q
|| level
> 3)
3659 warning ("invalid debug level specification in option: `-%s'",
3661 warning ("no debugging information will be generated");
3665 /* If more than one debugging type is supported,
3666 you must define PREFERRED_DEBUGGING_TYPE
3667 to choose a format in a system-dependent way. */
3668 /* This is one long line cause VAXC can't handle a \-newline. */
3669 #if 1 < (defined (DBX_DEBUGGING_INFO) + defined (SDB_DEBUGGING_INFO) + defined (DWARF_DEBUGGING_INFO) + defined (XCOFF_DEBUGGING_INFO))
3670 #ifdef PREFERRED_DEBUGGING_TYPE
3671 if (!strncmp (str
, "ggdb", len
))
3672 write_symbols
= PREFERRED_DEBUGGING_TYPE
;
3673 #else /* no PREFERRED_DEBUGGING_TYPE */
3674 You Lose
! You must define PREFERRED_DEBUGGING_TYPE
!
3675 #endif /* no PREFERRED_DEBUGGING_TYPE */
3676 #endif /* More than one debugger format enabled. */
3677 #ifdef DBX_DEBUGGING_INFO
3678 if (write_symbols
!= NO_DEBUG
)
3680 else if (!strncmp (str
, "ggdb", len
))
3681 write_symbols
= DBX_DEBUG
;
3682 else if (!strncmp (str
, "gstabs", len
))
3683 write_symbols
= DBX_DEBUG
;
3684 else if (!strncmp (str
, "gstabs+", len
))
3685 write_symbols
= DBX_DEBUG
;
3687 /* Always enable extensions for -ggdb or -gstabs+,
3688 always disable for -gstabs.
3689 For plain -g, use system-specific default. */
3690 if (write_symbols
== DBX_DEBUG
&& !strncmp (str
, "ggdb", len
)
3692 use_gnu_debug_info_extensions
= 1;
3693 else if (write_symbols
== DBX_DEBUG
&& !strncmp (str
, "gstabs+", len
)
3695 use_gnu_debug_info_extensions
= 1;
3696 else if (write_symbols
== DBX_DEBUG
3697 && !strncmp (str
, "gstabs", len
) && len
>= 2)
3698 use_gnu_debug_info_extensions
= 0;
3700 use_gnu_debug_info_extensions
= DEFAULT_GDB_EXTENSIONS
;
3701 #endif /* DBX_DEBUGGING_INFO */
3702 #ifdef DWARF_DEBUGGING_INFO
3703 if (write_symbols
!= NO_DEBUG
)
3705 else if (!strncmp (str
, "g", len
))
3706 write_symbols
= DWARF_DEBUG
;
3707 else if (!strncmp (str
, "ggdb", len
))
3708 write_symbols
= DWARF_DEBUG
;
3709 else if (!strncmp (str
, "gdwarf", len
))
3710 write_symbols
= DWARF_DEBUG
;
3712 /* Always enable extensions for -ggdb or -gdwarf+,
3713 always disable for -gdwarf.
3714 For plain -g, use system-specific default. */
3715 if (write_symbols
== DWARF_DEBUG
&& !strncmp (str
, "ggdb", len
)
3717 use_gnu_debug_info_extensions
= 1;
3718 else if (write_symbols
== DWARF_DEBUG
&& !strcmp (str
, "gdwarf+"))
3719 use_gnu_debug_info_extensions
= 1;
3720 else if (write_symbols
== DWARF_DEBUG
3721 && !strncmp (str
, "gdwarf", len
) && len
>= 2)
3722 use_gnu_debug_info_extensions
= 0;
3724 use_gnu_debug_info_extensions
= DEFAULT_GDB_EXTENSIONS
;
3726 #ifdef SDB_DEBUGGING_INFO
3727 if (write_symbols
!= NO_DEBUG
)
3729 else if (!strncmp (str
, "g", len
))
3730 write_symbols
= SDB_DEBUG
;
3731 else if (!strncmp (str
, "gdb", len
))
3732 write_symbols
= SDB_DEBUG
;
3733 else if (!strncmp (str
, "gcoff", len
))
3734 write_symbols
= SDB_DEBUG
;
3735 #endif /* SDB_DEBUGGING_INFO */
3736 #ifdef XCOFF_DEBUGGING_INFO
3737 if (write_symbols
!= NO_DEBUG
)
3739 else if (!strncmp (str
, "g", len
))
3740 write_symbols
= XCOFF_DEBUG
;
3741 else if (!strncmp (str
, "ggdb", len
))
3742 write_symbols
= XCOFF_DEBUG
;
3743 else if (!strncmp (str
, "gxcoff", len
))
3744 write_symbols
= XCOFF_DEBUG
;
3746 /* Always enable extensions for -ggdb or -gxcoff+,
3747 always disable for -gxcoff.
3748 For plain -g, use system-specific default. */
3749 if (write_symbols
== XCOFF_DEBUG
&& !strncmp (str
, "ggdb", len
)
3751 use_gnu_debug_info_extensions
= 1;
3752 else if (write_symbols
== XCOFF_DEBUG
&& !strcmp (str
, "gxcoff+"))
3753 use_gnu_debug_info_extensions
= 1;
3754 else if (write_symbols
== XCOFF_DEBUG
3755 && !strncmp (str
, "gxcoff", len
) && len
>= 2)
3756 use_gnu_debug_info_extensions
= 0;
3758 use_gnu_debug_info_extensions
= DEFAULT_GDB_EXTENSIONS
;
3760 if (write_symbols
== NO_DEBUG
)
3761 warning ("`-%s' option not supported on this version of GCC", str
);
3762 else if (level
== 0)
3763 write_symbols
= NO_DEBUG
;
3765 debug_info_level
= (enum debug_info_level
) level
;
3767 else if (!strcmp (str
, "o"))
3769 asm_file_name
= argv
[++i
];
3771 else if (str
[0] == 'G')
3773 g_switch_set
= TRUE
;
3774 g_switch_value
= atoi ((str
[1] != '\0') ? str
+1 : argv
[++i
]);
3776 else if (!strncmp (str
, "aux-info", 8))
3778 flag_gen_aux_info
= 1;
3779 aux_info_file_name
= (str
[8] != '\0' ? str
+8 : argv
[++i
]);
3782 error ("Invalid option `%s'", argv
[i
]);
3784 else if (argv
[i
][0] == '+')
3785 error ("Invalid option `%s'", argv
[i
]);
3790 /* Initialize for bytecode output. A good idea to do this as soon as
3791 possible after the "-f" options have been parsed. */
3792 if (output_bytecode
)
3794 #ifndef TARGET_SUPPORTS_BYTECODE
3795 /* Just die with a fatal error if not supported */
3796 fatal ("-fbytecode not supporter for this target");
3804 /* Inlining does not work if not optimizing,
3805 so force it not to be done. */
3809 /* The c_decode_option and lang_decode_option functions set
3810 this to `2' if -Wall is used, so we can avoid giving out
3811 lots of errors for people who don't realize what -Wall does. */
3812 if (warn_uninitialized
== 1)
3813 warning ("-Wuninitialized is not supported without -O");
3816 #if defined(DWARF_DEBUGGING_INFO)
3817 if (write_symbols
== DWARF_DEBUG
3818 && strcmp (language_string
, "GNU C++") == 0)
3820 warning ("-g option not supported for C++ on SVR4 systems");
3821 write_symbols
= NO_DEBUG
;
3823 #endif /* defined(DWARF_DEBUGGING_INFO) */
3825 #ifdef OVERRIDE_OPTIONS
3826 /* Some machines may reject certain combinations of options. */
3830 /* Unrolling all loops implies that standard loop unrolling must also
3832 if (flag_unroll_all_loops
)
3833 flag_unroll_loops
= 1;
3834 /* Loop unrolling requires that strength_reduction be on also. Silently
3835 turn on strength reduction here if it isn't already on. Also, the loop
3836 unrolling code assumes that cse will be run after loop, so that must
3837 be turned on also. */
3838 if (flag_unroll_loops
)
3840 flag_strength_reduce
= 1;
3841 flag_rerun_cse_after_loop
= 1;
3844 /* Warn about options that are not supported on this machine. */
3845 #ifndef INSN_SCHEDULING
3846 if (flag_schedule_insns
|| flag_schedule_insns_after_reload
)
3847 warning ("instruction scheduling not supported on this target machine");
3850 if (flag_delayed_branch
)
3851 warning ("this target machine does not have delayed branches");
3854 /* If we are in verbose mode, write out the version and maybe all the
3855 option flags in use. */
3858 fprintf (stderr
, "%s version %s", language_string
, version_string
);
3859 #ifdef TARGET_VERSION
3864 #define __VERSION__ "[unknown]"
3866 fprintf (stderr
, " compiled by GNU C version %s.\n", __VERSION__
);
3868 fprintf (stderr
, " compiled by CC.\n");
3871 print_switch_values ();
3874 compile_file (filename
);
3880 char *lim
= (char *) sbrk (0);
3882 fprintf (stderr
, "Data size %d.\n",
3883 lim
- (char *) &environ
);
3887 system ("ps -l 1>&2");
3890 #endif /* not USG */
3892 #endif /* not VMS */
3893 #endif /* not OS2 */
3896 exit (FATAL_EXIT_CODE
);
3898 exit (FATAL_EXIT_CODE
);
3899 exit (SUCCESS_EXIT_CODE
);
3903 /* Decode -m switches. */
3905 /* Here is a table, controlled by the tm.h file, listing each -m switch
3906 and which bits in `target_switches' it should set or clear.
3907 If VALUE is positive, it is bits to set.
3908 If VALUE is negative, -VALUE is bits to clear.
3909 (The sign bit is not used so there is no confusion.) */
3911 struct {char *name
; int value
;} target_switches
[]
3914 /* This table is similar, but allows the switch to have a value. */
3916 #ifdef TARGET_OPTIONS
3917 struct {char *prefix
; char ** variable
;} target_options
[]
3921 /* Decode the switch -mNAME. */
3924 set_target_switch (name
)
3930 for (j
= 0; j
< sizeof target_switches
/ sizeof target_switches
[0]; j
++)
3931 if (!strcmp (target_switches
[j
].name
, name
))
3933 if (target_switches
[j
].value
< 0)
3934 target_flags
&= ~-target_switches
[j
].value
;
3936 target_flags
|= target_switches
[j
].value
;
3940 #ifdef TARGET_OPTIONS
3942 for (j
= 0; j
< sizeof target_options
/ sizeof target_options
[0]; j
++)
3944 int len
= strlen (target_options
[j
].prefix
);
3945 if (!strncmp (target_options
[j
].prefix
, name
, len
))
3947 *target_options
[j
].variable
= name
+ len
;
3954 error ("Invalid option `%s'", name
);
3957 /* Variable used for communication between the following two routines. */
3959 static int line_position
;
3961 /* Print an option value and adjust the position in the line. */
3964 print_single_switch (type
, name
)
3967 fprintf (stderr
, " %s%s", type
, name
);
3969 line_position
+= strlen (type
) + strlen (name
) + 1;
3971 if (line_position
> 65)
3973 fprintf (stderr
, "\n\t");
3978 /* Print default target switches for -version. */
3981 print_switch_values ()
3985 fprintf (stderr
, "enabled:");
3988 for (j
= 0; j
< sizeof f_options
/ sizeof f_options
[0]; j
++)
3989 if (*f_options
[j
].variable
== f_options
[j
].on_value
)
3990 print_single_switch ("-f", f_options
[j
].string
);
3992 for (j
= 0; j
< sizeof W_options
/ sizeof W_options
[0]; j
++)
3993 if (*W_options
[j
].variable
== W_options
[j
].on_value
)
3994 print_single_switch ("-W", W_options
[j
].string
);
3996 for (j
= 0; j
< sizeof target_switches
/ sizeof target_switches
[0]; j
++)
3997 if (target_switches
[j
].name
[0] != '\0'
3998 && target_switches
[j
].value
> 0
3999 && ((target_switches
[j
].value
& target_flags
)
4000 == target_switches
[j
].value
))
4001 print_single_switch ("-m", target_switches
[j
].name
);
4003 fprintf (stderr
, "\n");