1 /* Top level of GNU C compiler
2 Copyright (C) 1987, 1988, 1989, 1992 Free Software Foundation, Inc.
4 This file is part of GNU CC.
6 GNU CC is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2, or (at your option)
11 GNU CC is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with GNU CC; see the file COPYING. If not, write to
18 the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
21 /* This is the top level of cc1/c++.
22 It parses command args, opens files, invokes the various passes
23 in the proper order, and counts the time used by each.
24 Error messages and low-level interface to malloc also handled here. */
27 #include <sys/types.h>
36 #include <sys/param.h>
37 /* This is for hpux. It is a real screw. They should change hpux. */
39 #include <sys/times.h>
40 #include <time.h> /* Correct for hpux at least. Is it good on other USG? */
41 #undef FFS /* Some systems define this in param.h. */
45 #include <sys/resource.h>
51 /* #include "c-tree.h" */
54 #include "insn-attr.h"
56 #ifdef XCOFF_DEBUGGING_INFO
61 /* The extra parameters substantially improve the I/O performance. */
63 VMS_fopen (fname, type)
67 if (strcmp (type, "w") == 0)
68 return fopen (fname, type, "mbc=16", "deq=64", "fop=tef", "shr=nil");
69 return fopen (fname, type, "mbc=16");
71 #define fopen VMS_fopen
74 #ifndef DEFAULT_GDB_EXTENSIONS
75 #define DEFAULT_GDB_EXTENSIONS 1
78 extern int rtx_equal_function_value_matters;
80 extern char **environ;
81 extern char *version_string, *language_string;
83 extern void init_lex ();
84 extern void init_decl_processing ();
85 extern void init_obstacks ();
86 extern void init_tree_codes ();
87 extern void init_rtl ();
88 extern void init_optabs ();
89 extern void init_stmt ();
90 extern void init_reg_sets ();
91 extern void dump_flow_info ();
92 extern void dump_sched_info ();
93 extern void dump_local_alloc ();
95 void rest_of_decl_compilation ();
97 void error_with_file_and_line ();
102 void set_target_switch ();
103 static void print_switch_values ();
104 static char *decl_name ();
106 /* Name of program invoked, sans directories. */
110 /* Copy of arguments to main. */
114 /* Name of current original source file (what was input to cpp).
115 This comes from each #-command in the actual input. */
117 char *input_filename;
119 /* Name of top-level original source file (what was input to cpp).
120 This comes from the #-command at the beginning of the actual input.
121 If there isn't any there, then this is the cc1 input file name. */
123 char *main_input_filename;
125 /* Stream for reading from the input file. */
129 /* Current line number in real source file. */
133 /* Stack of currently pending input files. */
135 struct file_stack *input_file_stack;
137 /* Incremented on each change to input_file_stack. */
138 int input_file_stack_tick;
140 /* FUNCTION_DECL for function now being parsed or compiled. */
142 extern tree current_function_decl;
144 /* Name to use as base of names for dump output files. */
146 char *dump_base_name;
148 /* Bit flags that specify the machine subtype we are compiling for.
149 Bits are tested using macros TARGET_... defined in the tm.h file
150 and set by `-m...' switches. Must be defined in rtlanal.c. */
152 extern int target_flags;
154 /* Flags saying which kinds of debugging dump have been requested. */
157 int rtl_dump_and_exit = 0;
158 int jump_opt_dump = 0;
163 int combine_dump = 0;
165 int local_reg_dump = 0;
166 int global_reg_dump = 0;
168 int jump2_opt_dump = 0;
169 int dbr_sched_dump = 0;
170 int flag_print_asm_name = 0;
171 int stack_reg_dump = 0;
173 /* Name for output file of assembly code, specified with -o. */
177 /* Value of the -G xx switch, and whether it was passed or not. */
181 /* Type(s) of debugging information we are producing (if any).
182 See flags.h for the definitions of the different possible
183 types of debugging information. */
184 enum debug_info_type write_symbols = NO_DEBUG;
186 /* Level of debugging information we are producing. See flags.h
187 for the definitions of the different possible levels. */
188 enum debug_info_level debug_info_level = DINFO_LEVEL_NONE;
190 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
191 /* Nonzero means can use our own extensions to DBX format.
192 Relevant only when write_symbols == DBX_DEBUG or XCOFF_DEBUG. */
193 int use_gdb_dbx_extensions = 0;
196 /* Nonzero means do optimizations. -O.
197 Particular numeric values stand for particular amounts of optimization;
198 thus, -O2 stores 2 here. However, the optimizations beyond the basic
199 ones are not controlled directly by this variable. Instead, they are
200 controlled by individual `flag_...' variables that are defaulted
201 based on this variable. */
205 /* Number of error messages and warning messages so far. */
208 int warningcount = 0;
211 /* Pointer to function to compute the name to use to print a declaration. */
213 char *(*decl_printable_name) ();
215 /* Pointer to function to compute rtl for a language-specific tree code. */
217 struct rtx_def *(*lang_expand_expr) ();
219 /* Nonzero if generating code to do profiling. */
221 int profile_flag = 0;
223 /* Nonzero if generating code to do profiling on a line-by-line basis. */
225 int profile_block_flag;
227 /* Nonzero for -pedantic switch: warn about anything
228 that standard spec forbids. */
232 /* Temporarily suppress certain warnings.
233 This is set while reading code from a system header file. */
235 int in_system_header = 0;
237 /* Nonzero means do stupid register allocation.
238 Currently, this is 1 if `optimize' is 0. */
240 int obey_regdecls = 0;
242 /* Don't print functions as they are compiled and don't print
243 times taken by the various passes. -quiet. */
249 /* Nonzero means `char' should be signed. */
251 int flag_signed_char;
253 /* Nonzero means give an enum type only as many bytes as it needs. */
255 int flag_short_enums;
257 /* Nonzero for -fcaller-saves: allocate values in regs that need to
258 be saved across function calls, if that produces overall better code.
259 Optional now, so people can test it. */
261 #ifdef DEFAULT_CALLER_SAVES
262 int flag_caller_saves = 1;
264 int flag_caller_saves = 0;
267 /* Nonzero for -fpcc-struct-return: return values the same way PCC does. */
269 int flag_pcc_struct_return = 0;
271 /* Nonzero for -fforce-mem: load memory value into a register
272 before arithmetic on it. This makes better cse but slower compilation. */
274 int flag_force_mem = 0;
276 /* Nonzero for -fforce-addr: load memory address into a register before
277 reference to memory. This makes better cse but slower compilation. */
279 int flag_force_addr = 0;
281 /* Nonzero for -fdefer-pop: don't pop args after each function call;
282 instead save them up to pop many calls' args with one insns. */
284 int flag_defer_pop = 1;
286 /* Nonzero for -ffloat-store: don't allocate floats and doubles
287 in extended-precision registers. */
289 int flag_float_store = 0;
291 /* Nonzero for -fcse-follow-jumps:
292 have cse follow jumps to do a more extensive job. */
294 int flag_cse_follow_jumps;
296 /* Nonzero for -fcse-skip-blocks:
297 have cse follow a branch around a block. */
298 int flag_cse_skip_blocks;
300 /* Nonzero for -fexpensive-optimizations:
301 perform miscellaneous relatively-expensive optimizations. */
302 int flag_expensive_optimizations;
304 /* Nonzero for -fthread-jumps:
305 have jump optimize output of loop. */
307 int flag_thread_jumps;
309 /* Nonzero enables strength-reduction in loop.c. */
311 int flag_strength_reduce = 0;
313 /* Nonzero enables loop unrolling in unroll.c. Only loops for which the
314 number of iterations can be calculated at compile-time (UNROLL_COMPLETELY,
315 UNROLL_MODULO) or at run-time (preconditioned to be UNROLL_MODULO) are
318 int flag_unroll_loops;
320 /* Nonzero enables loop unrolling in unroll.c. All loops are unrolled.
321 This is generally not a win. */
323 int flag_unroll_all_loops;
325 /* Nonzero for -fwritable-strings:
326 store string constants in data segment and don't uniquize them. */
328 int flag_writable_strings = 0;
330 /* Nonzero means don't put addresses of constant functions in registers.
331 Used for compiling the Unix kernel, where strange substitutions are
332 done on the assembly output. */
334 int flag_no_function_cse = 0;
336 /* Nonzero for -fomit-frame-pointer:
337 don't make a frame pointer in simple functions that don't require one. */
339 int flag_omit_frame_pointer = 0;
341 /* Nonzero to inhibit use of define_optimization peephole opts. */
343 int flag_no_peephole = 0;
345 /* Nonzero allows GCC to violate some IEEE or ANSI rules regarding math
346 operations in the interest of optimization. For example it allows
347 GCC to assume arguments to sqrt are nonnegative numbers, allowing
348 faster code for sqrt to be generated. */
350 int flag_fast_math = 0;
352 /* Nonzero means all references through pointers are volatile. */
356 /* Nonzero means just do syntax checking; don't output anything. */
358 int flag_syntax_only = 0;
360 /* Nonzero means to rerun cse after loop optimization. This increases
361 compilation time about 20% and picks up a few more common expressions. */
363 static int flag_rerun_cse_after_loop;
365 /* Nonzero for -finline-functions: ok to inline functions that look like
366 good inline candidates. */
368 int flag_inline_functions;
370 /* Nonzero for -fkeep-inline-functions: even if we make a function
371 go inline everywhere, keep its defintion around for debugging
374 int flag_keep_inline_functions;
376 /* Nonzero means that functions declared `inline' will be treated
377 as `static'. Prevents generation of zillions of copies of unused
378 static inline functions; instead, `inlines' are written out
379 only when actually used. Used in conjunction with -g. Also
380 does the right thing with #pragma interface. */
384 /* Nonzero means we should be saving declaration info into a .X file. */
386 int flag_gen_aux_info = 0;
388 /* Specified name of aux-info file. */
390 static char *aux_info_file_name;
392 /* Nonzero means make the text shared if supported. */
394 int flag_shared_data;
396 /* Nonzero means schedule into delayed branch slots if supported. */
398 int flag_delayed_branch;
400 /* Nonzero if we are compiling pure (sharable) code.
401 Value is 1 if we are doing reasonable (i.e. simple
402 offset into offset table) pic. Value is 2 if we can
403 only perform register offsets. */
407 /* Nonzero means place uninitialized global data in the bss section. */
411 /* Nonzero means pretend it is OK to examine bits of target floats,
412 even if that isn't true. The resulting code will have incorrect constants,
413 but the same series of instructions that the native compiler would make. */
415 int flag_pretend_float;
417 /* Nonzero means change certain warnings into errors.
418 Usually these are warnings about failure to conform to some standard. */
420 int flag_pedantic_errors = 0;
422 /* flag_schedule_insns means schedule insns within basic blocks (before
424 flag_schedule_insns_after_reload means schedule insns after
427 int flag_schedule_insns = 0;
428 int flag_schedule_insns_after_reload = 0;
430 /* -finhibit-size-directive inhibits output of .size for ELF.
431 This is used only for compiling crtstuff.c,
432 and it may be extended to other effects
433 needed for crtstuff.c on other systems. */
434 int flag_inhibit_size_directive = 0;
436 /* -fverbose-asm causes extra commentary information to be produced in
437 the generated assembly code (to make it more readable). This option
438 is generally only of use to those who actually need to read the
439 generated assembly code (perhaps while debugging the compiler itself). */
441 int flag_verbose_asm = 0;
443 /* -fgnu-linker specifies use of the GNU linker for initializations.
444 (Or, more generally, a linker that handles initializations.)
445 -fno-gnu-linker says that collect2 will be used. */
447 int flag_gnu_linker = 0;
449 int flag_gnu_linker = 1;
452 /* Table of language-independent -f options.
453 STRING is the option name. VARIABLE is the address of the variable.
454 ON_VALUE is the value to store in VARIABLE
455 if `-fSTRING' is seen as an option.
456 (If `-fno-STRING' is seen as an option, the opposite value is stored.) */
458 struct { char *string; int *variable; int on_value;} f_options[] =
460 {"float-store", &flag_float_store, 1},
461 {"volatile", &flag_volatile, 1},
462 {"defer-pop", &flag_defer_pop, 1},
463 {"omit-frame-pointer", &flag_omit_frame_pointer, 1},
464 {"cse-follow-jumps", &flag_cse_follow_jumps, 1},
465 {"cse-skip-blocks", &flag_cse_skip_blocks, 1},
466 {"expensive-optimizations", &flag_expensive_optimizations, 1},
467 {"thread-jumps", &flag_thread_jumps, 1},
468 {"strength-reduce", &flag_strength_reduce, 1},
469 {"unroll-loops", &flag_unroll_loops, 1},
470 {"unroll-all-loops", &flag_unroll_all_loops, 1},
471 {"writable-strings", &flag_writable_strings, 1},
472 {"peephole", &flag_no_peephole, 0},
473 {"force-mem", &flag_force_mem, 1},
474 {"force-addr", &flag_force_addr, 1},
475 {"function-cse", &flag_no_function_cse, 0},
476 {"inline-functions", &flag_inline_functions, 1},
477 {"keep-inline-functions", &flag_keep_inline_functions, 1},
478 {"inline", &flag_no_inline, 0},
479 {"syntax-only", &flag_syntax_only, 1},
480 {"shared-data", &flag_shared_data, 1},
481 {"caller-saves", &flag_caller_saves, 1},
482 {"pcc-struct-return", &flag_pcc_struct_return, 1},
483 {"delayed-branch", &flag_delayed_branch, 1},
484 {"rerun-cse-after-loop", &flag_rerun_cse_after_loop, 1},
485 {"pretend-float", &flag_pretend_float, 1},
486 {"schedule-insns", &flag_schedule_insns, 1},
487 {"schedule-insns2", &flag_schedule_insns_after_reload, 1},
488 {"pic", &flag_pic, 1},
489 {"PIC", &flag_pic, 2},
490 {"fast-math", &flag_fast_math, 1},
491 {"common", &flag_no_common, 0},
492 {"inhibit-size-directive", &flag_inhibit_size_directive, 1},
493 {"verbose-asm", &flag_verbose_asm, 1},
494 {"gnu-linker", &flag_gnu_linker, 1}
497 /* Options controlling warnings */
499 /* Don't print warning messages. -w. */
501 int inhibit_warnings = 0;
503 /* Print various extra warnings. -W. */
505 int extra_warnings = 0;
507 /* Treat warnings as errors. -Werror. */
509 int warnings_are_errors = 0;
511 /* Nonzero to warn about unused local variables. */
515 /* Nonzero to warn about variables used before they are initialized. */
517 int warn_uninitialized;
519 /* Nonzero means warn about all declarations which shadow others. */
523 /* Warn if a switch on an enum fails to have a case for every enum value. */
527 /* Nonzero means warn about function definitions that default the return type
528 or that use a null return and have a return-type other than void. */
530 int warn_return_type;
532 /* Nonzero means warn about pointer casts that increase the required
533 alignment of the target type (and might therefore lead to a crash
534 due to a misaligned access). */
538 /* Nonzero means warn about any identifiers that match in the first N
539 characters. The value N is in `id_clash_len'. */
544 /* Nonzero means warn if inline function is too large. */
548 /* Warn if a function returns an aggregate,
549 since there are often incompatible calling conventions for doing this. */
551 int warn_aggregate_return;
553 /* Likewise for -W. */
555 struct { char *string; int *variable; int on_value;} W_options[] =
557 {"unused", &warn_unused, 1},
558 {"error", &warnings_are_errors, 1},
559 {"shadow", &warn_shadow, 1},
560 {"switch", &warn_switch, 1},
561 {"return-type", &warn_return_type, 1},
562 {"aggregate-return", &warn_aggregate_return, 1},
563 {"cast-align", &warn_cast_align, 1},
564 {"uninitialized", &warn_uninitialized, 1},
565 {"inline", &warn_inline, 1}
568 /* Output files for assembler code (real compiler output)
569 and debugging dumps. */
574 FILE *jump_opt_dump_file;
576 FILE *loop_dump_file;
577 FILE *cse2_dump_file;
578 FILE *flow_dump_file;
579 FILE *combine_dump_file;
580 FILE *sched_dump_file;
581 FILE *local_reg_dump_file;
582 FILE *global_reg_dump_file;
583 FILE *sched2_dump_file;
584 FILE *jump2_opt_dump_file;
585 FILE *dbr_sched_dump_file;
586 FILE *stack_reg_dump_file;
588 /* Time accumulators, to count the total time spent in various passes. */
592 int integration_time;
600 int local_alloc_time;
601 int global_alloc_time;
604 int shorten_branch_time;
610 /* Return time used so far, in microseconds. */
619 struct rusage rusage;
624 int proc_system_time;
626 int child_system_time;
636 return (tms.tms_utime + tms.tms_stime) * (1000000 / HZ);
639 getrusage (0, &rusage);
640 return (rusage.ru_utime.tv_sec * 1000000 + rusage.ru_utime.tv_usec
641 + rusage.ru_stime.tv_sec * 1000000 + rusage.ru_stime.tv_usec);
644 return (vms_times.proc_user_time + vms_times.proc_system_time) * 10000;
649 #define TIMEVAR(VAR, BODY) \
650 do { int otime = get_run_time (); BODY; VAR += get_run_time () - otime; } while (0)
653 print_time (str, total)
658 "time in %s: %d.%06d\n",
659 str, total / 1000000, total % 1000000);
662 /* Count an error or warning. Return 1 if the message should be printed. */
665 count_error (warningp)
668 if (warningp && inhibit_warnings)
671 if (warningp && !warnings_are_errors)
675 static int warning_message = 0;
677 if (warningp && !warning_message)
679 fprintf (stderr, "%s: warnings being treated as errors\n", progname);
688 /* Print a fatal error message. NAME is the text.
689 Also include a system error message based on `errno'. */
692 pfatal_with_name (name)
695 fprintf (stderr, "%s: ", progname);
701 fatal_io_error (name)
704 fprintf (stderr, "%s: %s: I/O error\n", progname, name);
717 /* Called to give a better error message when we don't have an insn to match
718 what we are looking for or if the insn's constraints aren't satisfied,
719 rather than just calling abort(). */
722 fatal_insn_not_found (insn)
725 if (INSN_CODE (insn) < 0)
726 error ("internal error--unrecognizable insn:", 0);
728 error ("internal error--insn does not satisfy its constraints:", 0);
731 fflush (asm_out_file);
733 fflush (aux_info_file);
735 fflush (rtl_dump_file);
736 if (jump_opt_dump_file)
737 fflush (jump_opt_dump_file);
739 fflush (cse_dump_file);
741 fflush (loop_dump_file);
743 fflush (cse2_dump_file);
745 fflush (flow_dump_file);
746 if (combine_dump_file)
747 fflush (combine_dump_file);
749 fflush (sched_dump_file);
750 if (local_reg_dump_file)
751 fflush (local_reg_dump_file);
752 if (global_reg_dump_file)
753 fflush (global_reg_dump_file);
754 if (sched2_dump_file)
755 fflush (sched2_dump_file);
756 if (jump2_opt_dump_file)
757 fflush (jump2_opt_dump_file);
758 if (dbr_sched_dump_file)
759 fflush (dbr_sched_dump_file);
760 if (stack_reg_dump_file)
761 fflush (stack_reg_dump_file);
765 /* This is the default decl_printable_name function. */
768 decl_name (decl, kind)
772 return IDENTIFIER_POINTER (DECL_NAME (decl));
775 static int need_error_newline;
777 /* Function of last error message;
778 more generally, function such that if next error message is in it
779 then we don't have to mention the function name. */
780 static tree last_error_function = NULL;
782 /* Used to detect when input_file_stack has changed since last described. */
783 static int last_error_tick;
785 /* Called when the start of a function definition is parsed,
786 this function prints on stderr the name of the function. */
789 announce_function (decl)
795 if (rtl_dump_and_exit)
796 fprintf (stderr, "%s ", IDENTIFIER_POINTER (DECL_NAME (decl)));
798 fprintf (stderr, " %s", (*decl_printable_name) (decl, &junk));
800 need_error_newline = 1;
801 last_error_function = current_function_decl;
805 /* Prints out, if necessary, the name of the current function
806 which caused an error. Called from all error and warning functions. */
809 report_error_function (file)
812 struct file_stack *p;
814 if (need_error_newline)
816 fprintf (stderr, "\n");
817 need_error_newline = 0;
820 if (last_error_function != current_function_decl)
822 char *kind = "function";
823 if (current_function_decl != 0
824 && TREE_CODE (TREE_TYPE (current_function_decl)) == METHOD_TYPE)
828 fprintf (stderr, "%s: ", file);
830 if (current_function_decl == NULL)
831 fprintf (stderr, "At top level:\n");
834 char *name = (*decl_printable_name) (current_function_decl, &kind);
835 fprintf (stderr, "In %s `%s':\n", kind, name);
838 last_error_function = current_function_decl;
840 if (input_file_stack && input_file_stack->next != 0
841 && input_file_stack_tick != last_error_tick)
843 fprintf (stderr, "In file included");
844 for (p = input_file_stack->next; p; p = p->next)
846 fprintf (stderr, " from %s:%d", p->name, p->line);
848 fprintf (stderr, ",");
850 fprintf (stderr, ":\n");
851 last_error_tick = input_file_stack_tick;
855 /* Report an error at the current line number.
856 S and V are a string and an arg for `printf'. */
861 int v; /* @@also used as pointer */
862 int v2; /* @@also used as pointer */
864 error_with_file_and_line (input_filename, lineno, s, v, v2);
867 /* Report an error at line LINE of file FILE.
868 S and V are a string and an arg for `printf'. */
871 error_with_file_and_line (file, line, s, v, v2)
880 report_error_function (file);
883 fprintf (stderr, "%s:%d: ", file, line);
885 fprintf (stderr, "%s: ", progname);
886 fprintf (stderr, s, v, v2);
887 fprintf (stderr, "\n");
890 /* Report an error at the declaration DECL.
891 S and V are a string and an arg which uses %s to substitute the declaration name. */
894 error_with_decl (decl, s, v)
902 report_error_function (DECL_SOURCE_FILE (decl));
904 fprintf (stderr, "%s:%d: ",
905 DECL_SOURCE_FILE (decl), DECL_SOURCE_LINE (decl));
907 if (DECL_NAME (decl))
908 fprintf (stderr, s, (*decl_printable_name) (decl, &junk), v);
910 fprintf (stderr, s, "((anonymous))", v);
911 fprintf (stderr, "\n");
914 /* Report an error at the line number of the insn INSN.
915 S and V are a string and an arg for `printf'.
916 This is used only when INSN is an `asm' with operands,
917 and each ASM_OPERANDS records its own source file and line. */
920 error_for_asm (insn, s, v, v2)
923 int v; /* @@also used as pointer */
924 int v2; /* @@also used as pointer */
928 rtx body = PATTERN (insn);
931 /* Find the (or one of the) ASM_OPERANDS in the insn. */
932 if (GET_CODE (body) == SET && GET_CODE (SET_SRC (body)) == ASM_OPERANDS)
933 asmop = SET_SRC (body);
934 else if (GET_CODE (body) == ASM_OPERANDS)
936 else if (GET_CODE (body) == PARALLEL
937 && GET_CODE (XVECEXP (body, 0, 0)) == SET)
938 asmop = SET_SRC (XVECEXP (body, 0, 0));
939 else if (GET_CODE (body) == PARALLEL
940 && GET_CODE (XVECEXP (body, 0, 0)) == ASM_OPERANDS)
941 asmop = XVECEXP (body, 0, 0);
943 filename = ASM_OPERANDS_SOURCE_FILE (asmop);
944 line = ASM_OPERANDS_SOURCE_LINE (asmop);
946 error_with_file_and_line (filename, line, s, v, v2);
949 /* Report a warning at line LINE.
950 S and V are a string and an arg for `printf'. */
953 warning_with_file_and_line (file, line, s, v, v2, v3)
961 if (count_error (1) == 0)
964 report_error_function (file);
967 fprintf (stderr, "%s:%d: ", file, line);
969 fprintf (stderr, "%s: ", progname);
971 fprintf (stderr, "warning: ");
972 fprintf (stderr, s, v, v2, v3);
973 fprintf (stderr, "\n");
976 /* Report a warning at the current line number.
977 S and V are a string and an arg for `printf'. */
980 warning (s, v, v2, v3)
982 int v; /* @@also used as pointer */
986 warning_with_file_and_line (input_filename, lineno, s, v, v2, v3);
989 /* Report a warning at the declaration DECL.
990 S is string which uses %s to substitute the declaration name.
991 V is a second parameter that S can refer to. */
994 warning_with_decl (decl, s, v)
1001 if (count_error (1) == 0)
1004 report_error_function (DECL_SOURCE_FILE (decl));
1006 fprintf (stderr, "%s:%d: ",
1007 DECL_SOURCE_FILE (decl), DECL_SOURCE_LINE (decl));
1009 fprintf (stderr, "warning: ");
1010 if (DECL_NAME (decl))
1011 fprintf (stderr, s, (*decl_printable_name) (decl, &junk), v);
1013 fprintf (stderr, s, "((anonymous))", v);
1014 fprintf (stderr, "\n");
1017 /* Report a warning at the line number of the insn INSN.
1018 S and V are a string and an arg for `printf'.
1019 This is used only when INSN is an `asm' with operands,
1020 and each ASM_OPERANDS records its own source file and line. */
1023 warning_for_asm (insn, s, v, v2)
1026 int v; /* @@also used as pointer */
1027 int v2; /* @@also used as pointer */
1031 rtx body = PATTERN (insn);
1034 /* Find the (or one of the) ASM_OPERANDS in the insn. */
1035 if (GET_CODE (body) == SET && GET_CODE (SET_SRC (body)) == ASM_OPERANDS)
1036 asmop = SET_SRC (body);
1037 else if (GET_CODE (body) == ASM_OPERANDS)
1039 else if (GET_CODE (body) == PARALLEL
1040 && GET_CODE (XVECEXP (body, 0, 0)) == SET)
1041 asmop = SET_SRC (XVECEXP (body, 0, 0));
1042 else if (GET_CODE (body) == PARALLEL
1043 && GET_CODE (XVECEXP (body, 0, 0)) == ASM_OPERANDS)
1044 asmop = XVECEXP (body, 0, 0);
1046 filename = ASM_OPERANDS_SOURCE_FILE (asmop);
1047 line = ASM_OPERANDS_SOURCE_LINE (asmop);
1049 warning_with_file_and_line (filename, line, s, v, v2);
1052 /* These functions issue either warnings or errors depending on
1053 -pedantic-errors. */
1058 int v; /* @@also used as pointer */
1061 if (flag_pedantic_errors)
1068 pedwarn_with_decl (decl, s, v)
1073 if (flag_pedantic_errors)
1074 error_with_decl (decl, s, v);
1076 warning_with_decl (decl, s, v);
1080 pedwarn_with_file_and_line (file, line, s, v, v2)
1087 if (flag_pedantic_errors)
1088 error_with_file_and_line (file, line, s, v, v2);
1090 warning_with_file_and_line (file, line, s, v, v2);
1093 /* Apologize for not implementing some feature.
1094 S, V, and V2 are a string and args for `printf'. */
1103 fprintf (stderr, "%s:%d: ", input_filename, lineno);
1105 fprintf (stderr, "%s: ", progname);
1107 fprintf (stderr, "sorry, not implemented: ");
1108 fprintf (stderr, s, v, v2);
1109 fprintf (stderr, "\n");
1112 /* Apologize for not implementing some feature, then quit.
1113 S, V, and V2 are a string and args for `printf'. */
1116 really_sorry (s, v, v2)
1121 fprintf (stderr, "%s:%d: ", input_filename, lineno);
1123 fprintf (stderr, "c++: ");
1125 fprintf (stderr, "sorry, not implemented: ");
1126 fprintf (stderr, s, v, v2);
1127 fatal (" (fatal)\n");
1130 /* More 'friendly' abort that prints the line and file.
1131 config.h can #define abort fancy_abort if you like that sort of thing.
1133 I don't think this is actually a good idea.
1134 Other sorts of crashes will look a certain way.
1135 It is a good thing if crashes from calling abort look the same way.
1141 fatal ("internal gcc abort");
1144 /* This calls abort and is used to avoid problems when abort if a macro.
1145 It is used when we need to pass the address of abort. */
1153 /* When `malloc.c' is compiled with `rcheck' defined,
1154 it calls this function to report clobberage. */
1162 /* Same as `malloc' but report error if no memory available. */
1168 register char *value = (char *) malloc (size);
1170 fatal ("virtual memory exhausted");
1174 /* Same as `realloc' but report error if no memory available. */
1177 xrealloc (ptr, size)
1181 char *result = (char *) realloc (ptr, size);
1183 fatal ("virtual memory exhausted");
1187 /* Return the logarithm of X, base 2, considering X unsigned,
1188 if X is a power of 2. Otherwise, returns -1. */
1192 register unsigned int x;
1194 register int log = 0;
1195 /* Test for 0 or a power of 2. */
1196 if (x == 0 || x != (x & -x))
1198 while ((x >>= 1) != 0)
1203 /* Given X, an unsigned number, return the largest int Y such that 2**Y <= X.
1204 If X is 0, return -1. */
1208 register unsigned int x;
1210 register int log = -1;
1218 jmp_buf float_handler;
1220 /* Specify where to longjmp to when a floating arithmetic error happens.
1221 If HANDLER is 0, it means don't handle the errors any more. */
1224 set_float_handler (handler)
1227 float_handled = (handler != 0);
1229 bcopy (handler, float_handler, sizeof (float_handler));
1232 /* Signals actually come here. */
1235 float_signal (signo)
1236 /* If this is missing, some compilers complain. */
1239 if (float_handled == 0)
1241 #if defined (USG) || defined (hpux)
1242 signal (SIGFPE, float_signal); /* re-enable the signal catcher */
1245 signal (SIGFPE, float_signal);
1246 longjmp (float_handler, 1);
1249 /* Handler for SIGPIPE. */
1253 /* If this is missing, some compilers complain. */
1256 fatal ("output pipe has been closed");
1259 /* Strip off a legitimate source ending from the input string NAME of
1263 strip_off_ending (name, len)
1267 if (len > 2 && ! strcmp (".c", name + len - 2))
1269 else if (len > 2 && ! strcmp (".m", name + len - 2))
1271 else if (len > 2 && ! strcmp (".i", name + len - 2))
1273 else if (len > 3 && ! strcmp (".ii", name + len - 3))
1275 else if (len > 3 && ! strcmp (".co", name + len - 3))
1277 else if (len > 3 && ! strcmp (".cc", name + len - 3))
1279 else if (len > 2 && ! strcmp (".C", name + len - 2))
1281 else if (len > 4 && ! strcmp (".cxx", name + len - 4))
1283 else if (len > 2 && ! strcmp (".f", name + len - 2))
1285 else if (len > 4 && ! strcmp (".ada", name + len - 4))
1289 /* Output a file name in the form wanted by System V. */
1292 output_file_directive (asm_file, input_name)
1296 int len = strlen (input_name);
1297 char *na = input_name + len;
1299 /* NA gets INPUT_NAME sans directory names. */
1300 while (na > input_name)
1307 #ifdef ASM_OUTPUT_MAIN_SOURCE_FILENAME
1308 ASM_OUTPUT_MAIN_SOURCE_FILENAME (asm_file, na);
1310 #ifdef ASM_OUTPUT_SOURCE_FILENAME
1311 ASM_OUTPUT_SOURCE_FILENAME (asm_file, na);
1313 fprintf (asm_file, "\t.file\t\"%s\"\n", na);
1318 /* Compile an entire file of output from cpp, named NAME.
1319 Write a file of assembly output and various debugging dumps. */
1327 int dump_base_name_length;
1329 int name_specified = name != 0;
1331 if (dump_base_name == 0)
1332 dump_base_name = name ? name : "gccdump";
1333 dump_base_name_length = strlen (dump_base_name);
1337 integration_time = 0;
1345 local_alloc_time = 0;
1346 global_alloc_time = 0;
1349 shorten_branch_time = 0;
1355 /* Open input file. */
1357 if (name == 0 || !strcmp (name, "-"))
1363 finput = fopen (name, "r");
1365 pfatal_with_name (name);
1367 #ifdef IO_BUFFER_SIZE
1368 setvbuf (finput, (char *) xmalloc (IO_BUFFER_SIZE), _IOFBF, IO_BUFFER_SIZE);
1371 /* Initialize data in various passes. */
1377 init_emit_once (debug_info_level == DINFO_LEVEL_NORMAL
1378 || debug_info_level == DINFO_LEVEL_VERBOSE);
1379 init_decl_processing ();
1387 if (flag_caller_saves)
1388 init_caller_save ();
1390 /* If auxiliary info generation is desired, open the output file.
1391 This goes in the same directory as the source file--unlike
1392 all the other output files. */
1393 if (flag_gen_aux_info)
1395 aux_info_file = fopen (aux_info_file_name, "w");
1396 if (aux_info_file == 0)
1397 pfatal_with_name (aux_info_file_name);
1400 /* If rtl dump desired, open the output file. */
1403 register char *dumpname = (char *) xmalloc (dump_base_name_length + 6);
1404 strcpy (dumpname, dump_base_name);
1405 strcat (dumpname, ".rtl");
1406 rtl_dump_file = fopen (dumpname, "w");
1407 if (rtl_dump_file == 0)
1408 pfatal_with_name (dumpname);
1411 /* If jump_opt dump desired, open the output file. */
1414 register char *dumpname = (char *) xmalloc (dump_base_name_length + 6);
1415 strcpy (dumpname, dump_base_name);
1416 strcat (dumpname, ".jump");
1417 jump_opt_dump_file = fopen (dumpname, "w");
1418 if (jump_opt_dump_file == 0)
1419 pfatal_with_name (dumpname);
1422 /* If cse dump desired, open the output file. */
1425 register char *dumpname = (char *) xmalloc (dump_base_name_length + 6);
1426 strcpy (dumpname, dump_base_name);
1427 strcat (dumpname, ".cse");
1428 cse_dump_file = fopen (dumpname, "w");
1429 if (cse_dump_file == 0)
1430 pfatal_with_name (dumpname);
1433 /* If loop dump desired, open the output file. */
1436 register char *dumpname = (char *) xmalloc (dump_base_name_length + 6);
1437 strcpy (dumpname, dump_base_name);
1438 strcat (dumpname, ".loop");
1439 loop_dump_file = fopen (dumpname, "w");
1440 if (loop_dump_file == 0)
1441 pfatal_with_name (dumpname);
1444 /* If cse2 dump desired, open the output file. */
1447 register char *dumpname = (char *) xmalloc (dump_base_name_length + 6);
1448 strcpy (dumpname, dump_base_name);
1449 strcat (dumpname, ".cse2");
1450 cse2_dump_file = fopen (dumpname, "w");
1451 if (cse2_dump_file == 0)
1452 pfatal_with_name (dumpname);
1455 /* If flow dump desired, open the output file. */
1458 register char *dumpname = (char *) xmalloc (dump_base_name_length + 6);
1459 strcpy (dumpname, dump_base_name);
1460 strcat (dumpname, ".flow");
1461 flow_dump_file = fopen (dumpname, "w");
1462 if (flow_dump_file == 0)
1463 pfatal_with_name (dumpname);
1466 /* If combine dump desired, open the output file. */
1469 register char *dumpname = (char *) xmalloc (dump_base_name_length + 10);
1470 strcpy (dumpname, dump_base_name);
1471 strcat (dumpname, ".combine");
1472 combine_dump_file = fopen (dumpname, "w");
1473 if (combine_dump_file == 0)
1474 pfatal_with_name (dumpname);
1477 /* If scheduling dump desired, open the output file. */
1480 register char *dumpname = (char *) xmalloc (dump_base_name_length + 7);
1481 strcpy (dumpname, dump_base_name);
1482 strcat (dumpname, ".sched");
1483 sched_dump_file = fopen (dumpname, "w");
1484 if (sched_dump_file == 0)
1485 pfatal_with_name (dumpname);
1488 /* If local_reg dump desired, open the output file. */
1491 register char *dumpname = (char *) xmalloc (dump_base_name_length + 6);
1492 strcpy (dumpname, dump_base_name);
1493 strcat (dumpname, ".lreg");
1494 local_reg_dump_file = fopen (dumpname, "w");
1495 if (local_reg_dump_file == 0)
1496 pfatal_with_name (dumpname);
1499 /* If global_reg dump desired, open the output file. */
1500 if (global_reg_dump)
1502 register char *dumpname = (char *) xmalloc (dump_base_name_length + 6);
1503 strcpy (dumpname, dump_base_name);
1504 strcat (dumpname, ".greg");
1505 global_reg_dump_file = fopen (dumpname, "w");
1506 if (global_reg_dump_file == 0)
1507 pfatal_with_name (dumpname);
1510 /* If 2nd scheduling dump desired, open the output file. */
1513 register char *dumpname = (char *) xmalloc (dump_base_name_length + 8);
1514 strcpy (dumpname, dump_base_name);
1515 strcat (dumpname, ".sched2");
1516 sched2_dump_file = fopen (dumpname, "w");
1517 if (sched2_dump_file == 0)
1518 pfatal_with_name (dumpname);
1521 /* If jump2_opt dump desired, open the output file. */
1524 register char *dumpname = (char *) xmalloc (dump_base_name_length + 7);
1525 strcpy (dumpname, dump_base_name);
1526 strcat (dumpname, ".jump2");
1527 jump2_opt_dump_file = fopen (dumpname, "w");
1528 if (jump2_opt_dump_file == 0)
1529 pfatal_with_name (dumpname);
1532 /* If dbr_sched dump desired, open the output file. */
1535 register char *dumpname = (char *) xmalloc (dump_base_name_length + 7);
1536 strcpy (dumpname, dump_base_name);
1537 strcat (dumpname, ".dbr");
1538 dbr_sched_dump_file = fopen (dumpname, "w");
1539 if (dbr_sched_dump_file == 0)
1540 pfatal_with_name (dumpname);
1545 /* If stack_reg dump desired, open the output file. */
1548 register char *dumpname = (char *) xmalloc (dump_base_name_length + 10);
1549 strcpy (dumpname, dump_base_name);
1550 strcat (dumpname, ".stack");
1551 stack_reg_dump_file = fopen (dumpname, "w");
1552 if (stack_reg_dump_file == 0)
1553 pfatal_with_name (dumpname);
1558 /* Open assembler code output file. */
1560 if (! name_specified && asm_file_name == 0)
1561 asm_out_file = stdout;
1564 register char *dumpname = (char *) xmalloc (dump_base_name_length + 6);
1565 int len = strlen (dump_base_name);
1566 strcpy (dumpname, dump_base_name);
1567 strip_off_ending (dumpname, len);
1568 strcat (dumpname, ".s");
1569 if (asm_file_name == 0)
1571 asm_file_name = (char *) xmalloc (strlen (dumpname) + 1);
1572 strcpy (asm_file_name, dumpname);
1574 if (!strcmp (asm_file_name, "-"))
1575 asm_out_file = stdout;
1577 asm_out_file = fopen (asm_file_name, "w");
1578 if (asm_out_file == 0)
1579 pfatal_with_name (asm_file_name);
1582 #ifdef IO_BUFFER_SIZE
1583 setvbuf (asm_out_file, (char *) xmalloc (IO_BUFFER_SIZE),
1584 _IOFBF, IO_BUFFER_SIZE);
1587 input_filename = name;
1589 /* Perform language-specific initialization.
1590 This may set main_input_filename. */
1593 /* If the input doesn't start with a #line, use the input name
1594 as the official input file name. */
1595 if (main_input_filename == 0)
1596 main_input_filename = name;
1598 /* Put an entry on the input file stack for the main input file. */
1600 = (struct file_stack *) xmalloc (sizeof (struct file_stack));
1601 input_file_stack->next = 0;
1602 input_file_stack->name = input_filename;
1604 ASM_FILE_START (asm_out_file);
1606 /* Output something to inform GDB that this compilation was by GCC. */
1607 #ifndef ASM_IDENTIFY_GCC
1608 fprintf (asm_out_file, "gcc2_compiled.:\n");
1610 ASM_IDENTIFY_GCC (asm_out_file);
1612 /* Don't let the first function fall at the same address
1613 as gcc_compiled., if profiling. */
1614 if (profile_flag || profile_block_flag)
1615 assemble_zeros (UNITS_PER_WORD);
1617 /* If dbx symbol table desired, initialize writing it
1618 and output the predefined types. */
1619 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
1620 if (write_symbols == DBX_DEBUG || write_symbols == XCOFF_DEBUG)
1621 TIMEVAR (symout_time, dbxout_init (asm_out_file, main_input_filename,
1624 #ifdef SDB_DEBUGGING_INFO
1625 if (write_symbols == SDB_DEBUG)
1626 TIMEVAR (symout_time, sdbout_init (asm_out_file, main_input_filename,
1629 #ifdef DWARF_DEBUGGING_INFO
1630 if (write_symbols == DWARF_DEBUG)
1631 TIMEVAR (symout_time, dwarfout_init (asm_out_file, main_input_filename));
1634 /* Initialize yet another pass. */
1636 init_final (main_input_filename);
1638 start_time = get_run_time ();
1640 /* Call the parser, which parses the entire file
1641 (calling rest_of_compilation for each function). */
1643 if (yyparse () != 0)
1644 if (errorcount == 0)
1645 fprintf (stderr, "Errors detected in input file (your bison.simple is out of date)");
1647 /* Compilation is now finished except for writing
1648 what's left of the symbol table output. */
1650 parse_time += get_run_time () - start_time;
1652 parse_time -= integration_time;
1653 parse_time -= varconst_time;
1655 globals = getdecls ();
1657 /* Really define vars that have had only a tentative definition.
1658 Really output inline functions that must actually be callable
1659 and have not been output so far. */
1662 int len = list_length (globals);
1663 tree *vec = (tree *) alloca (sizeof (tree) * len);
1667 /* Process the decls in reverse order--earliest first.
1668 Put them into VEC from back to front, then take out from front. */
1670 for (i = 0, decl = globals; i < len; i++, decl = TREE_CHAIN (decl))
1671 vec[len - i - 1] = decl;
1673 for (i = 0; i < len; i++)
1676 if (TREE_CODE (decl) == VAR_DECL && TREE_STATIC (decl)
1677 && ! TREE_ASM_WRITTEN (decl))
1679 /* Don't write out static consts, unless we used them.
1680 (This used to write them out only if the address was
1681 taken, but that was wrong; if the variable was simply
1682 referred to, it still needs to exist or else it will
1683 be undefined in the linker.) */
1684 if (! TREE_READONLY (decl)
1685 || TREE_PUBLIC (decl)
1687 || TREE_ADDRESSABLE (decl)
1688 || TREE_ADDRESSABLE (DECL_ASSEMBLER_NAME (decl)))
1689 rest_of_decl_compilation (decl, 0, 1, 1);
1691 /* Cancel the RTL for this decl so that, if debugging info
1692 output for global variables is still to come,
1693 this one will be omitted. */
1694 DECL_RTL (decl) = NULL;
1697 if (TREE_CODE (decl) == FUNCTION_DECL
1698 && ! TREE_ASM_WRITTEN (decl)
1699 && DECL_INITIAL (decl) != 0
1700 && (TREE_ADDRESSABLE (decl)
1701 || TREE_ADDRESSABLE (DECL_ASSEMBLER_NAME (decl)))
1702 && ! TREE_EXTERNAL (decl))
1703 output_inline_function (decl);
1705 /* Warn about any function
1706 declared static but not defined.
1707 We don't warn about variables,
1708 because many programs have static variables
1709 that exist only to get some text into the object file. */
1712 || (DECL_NAME (decl) && TREE_USED (DECL_NAME (decl))))
1713 && TREE_CODE (decl) == FUNCTION_DECL
1714 && DECL_INITIAL (decl) == 0
1715 && TREE_EXTERNAL (decl)
1716 && ! TREE_PUBLIC (decl))
1717 warning_with_decl (decl, "`%s' declared `static' but never defined");
1718 /* Warn about static fns or vars defined but not used,
1719 but not about inline functions
1720 since unused inline statics is normal practice. */
1722 && (TREE_CODE (decl) == FUNCTION_DECL
1723 || TREE_CODE (decl) == VAR_DECL)
1724 && ! TREE_EXTERNAL (decl)
1725 && ! TREE_PUBLIC (decl)
1726 && ! TREE_USED (decl)
1727 && ! TREE_INLINE (decl)
1728 /* The TREE_USED bit for file-scope decls
1729 is kept in the identifier, to handle multiple
1730 external decls in different scopes. */
1731 && ! TREE_USED (DECL_NAME (decl)))
1732 warning_with_decl (decl, "`%s' defined but not used");
1734 #ifdef SDB_DEBUGGING_INFO
1735 /* The COFF linker can move initialized global vars to the end.
1736 And that can screw up the symbol ordering.
1737 By putting the symbols in that order to begin with,
1738 we avoid a problem. mcsun!unido!fauern!tumuc!pes@uunet.uu.net. */
1739 if (write_symbols == SDB_DEBUG && TREE_CODE (decl) == VAR_DECL
1740 && TREE_PUBLIC (decl) && DECL_INITIAL (decl)
1741 && DECL_RTL (decl) != 0)
1742 TIMEVAR (symout_time, sdbout_symbol (decl, 0));
1744 /* Output COFF information for non-global
1745 file-scope initialized variables. */
1746 if (write_symbols == SDB_DEBUG
1747 && TREE_CODE (decl) == VAR_DECL
1748 && DECL_INITIAL (decl)
1749 && DECL_RTL (decl) != 0
1750 && GET_CODE (DECL_RTL (decl)) == MEM)
1751 TIMEVAR (symout_time, sdbout_toplevel_data (decl));
1752 #endif /* SDB_DEBUGGING_INFO */
1753 #ifdef DWARF_DEBUGGING_INFO
1754 /* Output DWARF information for file-scope tentative data object
1755 declarations, file-scope (extern) function declarations (which
1756 had no corresponding body) and file-scope tagged type declarations
1757 and definitions which have not yet been forced out. */
1759 if (write_symbols == DWARF_DEBUG
1760 && (TREE_CODE (decl) != FUNCTION_DECL || !DECL_INITIAL (decl)))
1761 TIMEVAR (symout_time, dwarfout_file_scope_decl (decl, 1));
1766 /* Do dbx symbols */
1767 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
1768 if (write_symbols == DBX_DEBUG || write_symbols == XCOFF_DEBUG)
1769 TIMEVAR (symout_time,
1771 dbxout_finish (asm_out_file, main_input_filename);
1775 #ifdef DWARF_DEBUGGING_INFO
1776 if (write_symbols == DWARF_DEBUG)
1777 TIMEVAR (symout_time,
1783 /* Output some stuff at end of file if nec. */
1785 end_final (main_input_filename);
1788 ASM_FILE_END (asm_out_file);
1791 after_finish_compilation:
1793 /* Language-specific end of compilation actions. */
1797 /* Close the dump files. */
1799 if (flag_gen_aux_info)
1801 fclose (aux_info_file);
1803 unlink (aux_info_file_name);
1807 fclose (rtl_dump_file);
1810 fclose (jump_opt_dump_file);
1813 fclose (cse_dump_file);
1816 fclose (loop_dump_file);
1819 fclose (cse2_dump_file);
1822 fclose (flow_dump_file);
1826 dump_combine_total_stats (combine_dump_file);
1827 fclose (combine_dump_file);
1831 fclose (sched_dump_file);
1834 fclose (local_reg_dump_file);
1836 if (global_reg_dump)
1837 fclose (global_reg_dump_file);
1840 fclose (sched2_dump_file);
1843 fclose (jump2_opt_dump_file);
1846 fclose (dbr_sched_dump_file);
1850 fclose (stack_reg_dump_file);
1853 /* Close non-debugging input and output files. Take special care to note
1854 whether fclose returns an error, since the pages might still be on the
1855 buffer chain while the file is open. */
1858 if (ferror (asm_out_file) != 0 || fclose (asm_out_file) != 0)
1859 fatal_io_error (asm_file_name);
1861 /* Print the times. */
1865 fprintf (stderr,"\n");
1866 print_time ("parse", parse_time);
1867 print_time ("integration", integration_time);
1868 print_time ("jump", jump_time);
1869 print_time ("cse", cse_time);
1870 print_time ("loop", loop_time);
1871 print_time ("cse2", cse2_time);
1872 print_time ("flow", flow_time);
1873 print_time ("combine", combine_time);
1874 print_time ("sched", sched_time);
1875 print_time ("local-alloc", local_alloc_time);
1876 print_time ("global-alloc", global_alloc_time);
1877 print_time ("sched2", sched2_time);
1878 print_time ("dbranch", dbr_sched_time);
1879 print_time ("shorten-branch", shorten_branch_time);
1880 print_time ("stack-reg", stack_reg_time);
1881 print_time ("final", final_time);
1882 print_time ("varconst", varconst_time);
1883 print_time ("symout", symout_time);
1884 print_time ("dump", dump_time);
1888 /* This is called from various places for FUNCTION_DECL, VAR_DECL,
1889 and TYPE_DECL nodes.
1891 This does nothing for local (non-static) variables.
1892 Otherwise, it sets up the RTL and outputs any assembler code
1893 (label definition, storage allocation and initialization).
1895 DECL is the declaration. If ASMSPEC is nonzero, it specifies
1896 the assembler symbol name to be used. TOP_LEVEL is nonzero
1897 if this declaration is not within a function. */
1900 rest_of_decl_compilation (decl, asmspec, top_level, at_end)
1906 /* Declarations of variables, and of functions defined elsewhere. */
1908 /* Forward declarations for nested functions are not "external",
1909 but we need to treat them as if they were. */
1910 if (TREE_STATIC (decl) || TREE_EXTERNAL (decl)
1911 || TREE_CODE (decl) == FUNCTION_DECL)
1912 TIMEVAR (varconst_time,
1914 make_decl_rtl (decl, asmspec, top_level);
1915 /* For a user-invisible decl that should be replaced
1916 by its value when used, don't output anything. */
1917 if (! (TREE_CODE (decl) == VAR_DECL
1918 && DECL_IGNORED_P (decl) && TREE_READONLY (decl)
1919 && DECL_INITIAL (decl) != 0))
1920 /* Don't output anything
1921 when a tentative file-scope definition is seen.
1922 But at end of compilation, do output code for them. */
1923 if (! (! at_end && top_level
1924 && (DECL_INITIAL (decl) == 0
1925 || DECL_INITIAL (decl) == error_mark_node
1926 || DECL_IGNORED_P (decl))))
1927 assemble_variable (decl, top_level, at_end);
1929 else if (TREE_REGDECL (decl) && asmspec != 0)
1931 if (decode_reg_name (asmspec) >= 0)
1933 DECL_RTL (decl) = 0;
1934 make_decl_rtl (decl, asmspec, top_level);
1937 error ("invalid register name `%s' for register variable", asmspec);
1939 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
1940 else if ((write_symbols == DBX_DEBUG || write_symbols == XCOFF_DEBUG)
1941 && TREE_CODE (decl) == TYPE_DECL)
1942 TIMEVAR (symout_time, dbxout_symbol (decl, 0));
1944 #ifdef SDB_DEBUGGING_INFO
1945 else if (write_symbols == SDB_DEBUG && top_level
1946 && TREE_CODE (decl) == TYPE_DECL)
1947 TIMEVAR (symout_time, sdbout_symbol (decl, 0));
1951 /* Called after finishing a record, union or enumeral type. */
1954 rest_of_type_compilation (type, toplev)
1958 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
1959 if (write_symbols == DBX_DEBUG || write_symbols == XCOFF_DEBUG)
1960 TIMEVAR (symout_time, dbxout_symbol (TYPE_STUB_DECL (type), !toplev));
1962 #ifdef SDB_DEBUGGING_INFO
1963 if (write_symbols == SDB_DEBUG)
1964 TIMEVAR (symout_time, sdbout_symbol (TYPE_STUB_DECL (type), !toplev));
1968 /* This is called from finish_function (within yyparse)
1969 after each top-level definition is parsed.
1970 It is supposed to compile that function or variable
1971 and output the assembler code for it.
1972 After we return, the tree storage is freed. */
1975 rest_of_compilation (decl)
1979 int start_time = get_run_time ();
1981 /* Nonzero if we have saved the original DECL_INITIAL of the function,
1982 to be restored after we finish compiling the function
1983 (for use when compiling inline calls to this function). */
1984 tree saved_block_tree = 0;
1987 /* If we are reconsidering an inline function
1988 at the end of compilation, skip the stuff for making it inline. */
1990 if (DECL_SAVED_INSNS (decl) == 0)
1992 int specd = TREE_INLINE (decl);
1995 /* If requested, consider whether to make this function inline. */
1996 if (specd || flag_inline_functions)
1997 TIMEVAR (integration_time,
1999 lose = function_cannot_inline_p (decl);
2002 if (warn_inline && specd)
2003 warning_with_decl (decl, lose);
2004 TREE_INLINE (decl) = 0;
2007 TREE_INLINE (decl) = 1;
2010 insns = get_insns ();
2012 /* Dump the rtl code if we are dumping rtl. */
2017 fprintf (rtl_dump_file, "\n;; Function %s\n\n",
2018 IDENTIFIER_POINTER (DECL_NAME (decl)));
2019 if (DECL_SAVED_INSNS (decl))
2020 fprintf (rtl_dump_file, ";; (integrable)\n\n");
2021 print_rtl (rtl_dump_file, insns);
2022 fflush (rtl_dump_file);
2025 /* If function is inline, and we don't yet know whether to
2026 compile it by itself, defer decision till end of compilation.
2027 finish_compilation will call rest_of_compilation again
2028 for those functions that need to be output. */
2030 if (TREE_INLINE (decl)
2031 && ((! TREE_PUBLIC (decl) && ! TREE_ADDRESSABLE (decl)
2032 && ! flag_keep_inline_functions)
2033 || TREE_EXTERNAL (decl)))
2035 TIMEVAR (integration_time, save_for_inline_nocopy (decl));
2036 goto exit_rest_of_compilation;
2039 /* If we have to compile the function now, save its rtl
2040 so that its compilation will not affect what others get. */
2041 if (TREE_INLINE (decl))
2043 saved_block_tree = DECL_INITIAL (decl);
2044 TIMEVAR (integration_time, save_for_inline_copying (decl));
2048 /* Suppress warnings for unused static functions
2049 defined (not just declared) in system headers. */
2050 if (in_system_header && TREE_STATIC (decl) && !TREE_INLINE (decl))
2051 TREE_USED (decl) = 1;
2053 TREE_ASM_WRITTEN (decl) = 1;
2055 /* Now that integrate will no longer see our rtl, we need not distinguish
2056 between the return value of this function and the return value of called
2058 rtx_equal_function_value_matters = 0;
2060 /* Don't return yet if -Wreturn-type; we need to do jump_optimize. */
2061 if ((rtl_dump_and_exit || flag_syntax_only) && !warn_return_type)
2063 goto exit_rest_of_compilation;
2066 /* From now on, allocate rtl in current_obstack, not in saveable_obstack.
2067 Note that that may have been done above, in save_for_inline_copying.
2068 The call to resume_temporary_allocation near the end of this function
2069 goes back to the usual state of affairs. */
2071 rtl_in_current_obstack ();
2074 /* If we are doing position-independent code generation, now
2075 is the time to output special prologues and epilogues.
2076 We do not want to do this earlier, because it just clutters
2077 up inline functions with meaningless insns. */
2082 insns = get_insns ();
2084 /* Copy any shared structure that should not be shared. */
2086 unshare_all_rtl (insns);
2088 /* Instantiate all virtual registers. */
2090 instantiate_virtual_regs (current_function_decl, get_insns ());
2092 /* See if we have allocated stack slots that are not directly addressable.
2093 If so, scan all the insns and create explicit address computation
2094 for all references to such slots. */
2095 /* fixup_stack_slots (); */
2097 /* Do jump optimization the first time, if -opt.
2098 Also do it if -W, but in that case it doesn't change the rtl code,
2099 it only computes whether control can drop off the end of the function. */
2101 if (optimize > 0 || extra_warnings || warn_return_type
2102 /* If function is `volatile', we should warn if it tries to return. */
2103 || TREE_THIS_VOLATILE (decl))
2105 TIMEVAR (jump_time, reg_scan (insns, max_reg_num (), 0));
2106 TIMEVAR (jump_time, jump_optimize (insns, 0, 0, 1));
2109 /* Now is when we stop if -fsyntax-only and -Wreturn-type. */
2110 if (rtl_dump_and_exit || flag_syntax_only)
2111 goto exit_rest_of_compilation;
2113 /* Dump rtl code after jump, if we are doing that. */
2118 fprintf (jump_opt_dump_file, "\n;; Function %s\n\n",
2119 IDENTIFIER_POINTER (DECL_NAME (decl)));
2120 print_rtl (jump_opt_dump_file, insns);
2121 fflush (jump_opt_dump_file);
2124 /* Perform common subexpression elimination.
2125 Nonzero value from `cse_main' means that jumps were simplified
2126 and some code may now be unreachable, so do
2127 jump optimization again. */
2132 fprintf (cse_dump_file, "\n;; Function %s\n\n",
2133 IDENTIFIER_POINTER (DECL_NAME (decl)));
2138 TIMEVAR (cse_time, reg_scan (insns, max_reg_num (), 1));
2140 if (flag_thread_jumps)
2141 /* Hacks by tiemann & kenner. */
2142 TIMEVAR (jump_time, thread_jumps (insns, max_reg_num (), 0));
2144 TIMEVAR (cse_time, tem = cse_main (insns, max_reg_num (),
2146 TIMEVAR (cse_time, delete_dead_from_cse (insns, max_reg_num ()));
2149 TIMEVAR (jump_time, jump_optimize (insns, 0, 0, 0));
2152 /* Dump rtl code after cse, if we are doing that. */
2157 print_rtl (cse_dump_file, insns);
2158 fflush (cse_dump_file);
2164 fprintf (loop_dump_file, "\n;; Function %s\n\n",
2165 IDENTIFIER_POINTER (DECL_NAME (decl)));
2168 /* Move constant computations out of loops. */
2174 loop_optimize (insns, loop_dump ? loop_dump_file : 0);
2178 /* Dump rtl code after loop opt, if we are doing that. */
2183 print_rtl (loop_dump_file, insns);
2184 fflush (loop_dump_file);
2190 fprintf (cse2_dump_file, "\n;; Function %s\n\n",
2191 IDENTIFIER_POINTER (DECL_NAME (decl)));
2194 if (optimize > 0 && flag_rerun_cse_after_loop)
2196 TIMEVAR (cse2_time, reg_scan (insns, max_reg_num (), 0));
2198 TIMEVAR (cse2_time, tem = cse_main (insns, max_reg_num (),
2199 1, cse2_dump_file));
2201 TIMEVAR (jump_time, jump_optimize (insns, 0, 0, 0));
2204 if (optimize > 0 && flag_thread_jumps)
2205 /* This pass of jump threading straightens out code
2206 that was kinked by loop optimization. */
2207 TIMEVAR (jump_time, thread_jumps (insns, max_reg_num (), 0));
2209 /* Dump rtl code after cse, if we are doing that. */
2214 print_rtl (cse2_dump_file, insns);
2215 fflush (cse2_dump_file);
2218 /* We are no longer anticipating cse in this function, at least. */
2220 cse_not_expected = 1;
2222 /* Now we choose between stupid (pcc-like) register allocation
2223 (if we got the -noreg switch and not -opt)
2224 and smart register allocation. */
2226 if (optimize > 0) /* Stupid allocation probably won't work */
2227 obey_regdecls = 0; /* if optimizations being done. */
2231 /* Print function header into flow dump now
2232 because doing the flow analysis makes some of the dump. */
2237 fprintf (flow_dump_file, "\n;; Function %s\n\n",
2238 IDENTIFIER_POINTER (DECL_NAME (decl)));
2245 regclass (insns, max_reg_num ());
2246 stupid_life_analysis (insns, max_reg_num (),
2252 /* Do control and data flow analysis,
2253 and write some of the results to dump file. */
2255 TIMEVAR (flow_time, flow_analysis (insns, max_reg_num (),
2257 if (warn_uninitialized)
2259 uninitialized_vars_warning (DECL_INITIAL (decl));
2260 setjmp_args_warning ();
2264 /* Dump rtl after flow analysis. */
2269 print_rtl (flow_dump_file, insns);
2270 fflush (flow_dump_file);
2273 /* If -opt, try combining insns through substitution. */
2276 TIMEVAR (combine_time, combine_instructions (insns, max_reg_num ()));
2278 /* Dump rtl code after insn combination. */
2283 fprintf (combine_dump_file, "\n;; Function %s\n\n",
2284 IDENTIFIER_POINTER (DECL_NAME (decl)));
2285 dump_combine_stats (combine_dump_file);
2286 print_rtl (combine_dump_file, insns);
2287 fflush (combine_dump_file);
2290 /* Print function header into sched dump now
2291 because doing the sched analysis makes some of the dump. */
2296 fprintf (sched_dump_file, "\n;; Function %s\n\n",
2297 IDENTIFIER_POINTER (DECL_NAME (decl)));
2300 if (optimize > 0 && flag_schedule_insns)
2302 /* Do control and data sched analysis,
2303 and write some of the results to dump file. */
2305 TIMEVAR (sched_time, schedule_insns (sched_dump_file));
2308 /* Dump rtl after instruction scheduling. */
2313 print_rtl (sched_dump_file, insns);
2314 fflush (sched_dump_file);
2317 /* Unless we did stupid register allocation,
2318 allocate pseudo-regs that are used only within 1 basic block. */
2321 TIMEVAR (local_alloc_time,
2323 regclass (insns, max_reg_num ());
2327 /* Dump rtl code after allocating regs within basic blocks. */
2332 fprintf (local_reg_dump_file, "\n;; Function %s\n\n",
2333 IDENTIFIER_POINTER (DECL_NAME (decl)));
2334 dump_flow_info (local_reg_dump_file);
2335 dump_local_alloc (local_reg_dump_file);
2336 print_rtl (local_reg_dump_file, insns);
2337 fflush (local_reg_dump_file);
2340 if (global_reg_dump)
2342 fprintf (global_reg_dump_file, "\n;; Function %s\n\n",
2343 IDENTIFIER_POINTER (DECL_NAME (decl))));
2345 /* Unless we did stupid register allocation,
2346 allocate remaining pseudo-regs, then do the reload pass
2347 fixing up any insns that are invalid. */
2349 TIMEVAR (global_alloc_time,
2352 failure = global_alloc (global_reg_dump ? global_reg_dump_file : 0);
2354 failure = reload (insns, 0,
2355 global_reg_dump ? global_reg_dump_file : 0);
2358 if (global_reg_dump)
2361 dump_global_regs (global_reg_dump_file);
2362 print_rtl (global_reg_dump_file, insns);
2363 fflush (global_reg_dump_file);
2367 goto exit_rest_of_compilation;
2369 reload_completed = 1;
2371 /* On some machines, the prologue and epilogue code, or parts thereof,
2372 can be represented as RTL. Doing so lets us schedule insns between
2373 it and the rest of the code and also allows delayed branch
2374 scheduling to operate in the epilogue. */
2376 thread_prologue_and_epilogue_insns (insns);
2378 if (optimize > 0 && flag_schedule_insns_after_reload)
2383 fprintf (sched2_dump_file, "\n;; Function %s\n\n",
2384 IDENTIFIER_POINTER (DECL_NAME (decl)));
2387 /* Do control and data sched analysis again,
2388 and write some more of the results to dump file. */
2390 TIMEVAR (sched2_time, schedule_insns (sched2_dump_file));
2392 /* Dump rtl after post-reorder instruction scheduling. */
2397 print_rtl (sched2_dump_file, insns);
2398 fflush (sched2_dump_file);
2402 #ifdef LEAF_REGISTERS
2404 if (optimize > 0 && only_leaf_regs_used () && leaf_function_p ())
2408 /* One more attempt to remove jumps to .+1
2409 left by dead-store-elimination.
2410 Also do cross-jumping this time
2411 and delete no-op move insns. */
2415 TIMEVAR (jump_time, jump_optimize (insns, 1, 1, 0));
2418 /* Dump rtl code after jump, if we are doing that. */
2423 fprintf (jump2_opt_dump_file, "\n;; Function %s\n\n",
2424 IDENTIFIER_POINTER (DECL_NAME (decl)));
2425 print_rtl (jump2_opt_dump_file, insns);
2426 fflush (jump2_opt_dump_file);
2429 /* If a scheduling pass for delayed branches is to be done,
2430 call the scheduling code. */
2433 if (optimize > 0 && flag_delayed_branch)
2435 TIMEVAR (dbr_sched_time, dbr_schedule (insns, dbr_sched_dump_file));
2440 fprintf (dbr_sched_dump_file, "\n;; Function %s\n\n",
2441 IDENTIFIER_POINTER (DECL_NAME (decl)));
2442 print_rtl (dbr_sched_dump_file, insns);
2443 fflush (dbr_sched_dump_file);
2450 /* Shorten branches. */
2451 TIMEVAR (shorten_branch_time,
2453 shorten_branches (get_insns ());
2457 TIMEVAR (stack_reg_time, reg_to_stack (insns, stack_reg_dump_file));
2462 fprintf (stack_reg_dump_file, "\n;; Function %s\n\n",
2463 IDENTIFIER_POINTER (DECL_NAME (decl)));
2464 print_rtl (stack_reg_dump_file, insns);
2465 fflush (stack_reg_dump_file);
2470 /* Now turn the rtl into assembler code. */
2472 TIMEVAR (final_time,
2477 /* Get the function's name, as described by its RTL.
2478 This may be different from the DECL_NAME name used
2479 in the source file. */
2481 x = DECL_RTL (decl);
2482 if (GET_CODE (x) != MEM)
2485 if (GET_CODE (x) != SYMBOL_REF)
2487 fnname = XSTR (x, 0);
2489 assemble_start_function (decl, fnname);
2490 final_start_function (insns, asm_out_file, optimize);
2491 final (insns, asm_out_file, optimize, 0);
2492 final_end_function (insns, asm_out_file, optimize);
2493 assemble_end_function (decl, fnname);
2494 fflush (asm_out_file);
2497 /* Write DBX symbols if requested */
2499 /* Note that for those inline functions where we don't initially
2500 know for certain that we will be generating an out-of-line copy,
2501 the first invocation of this routine (rest_of_compilation) will
2502 skip over this code by doing a `goto exit_rest_of_compilation;'.
2503 Later on, finish_compilation will call rest_of_compilation again
2504 for those inline functions that need to have out-of-line copies
2505 generated. During that call, we *will* be routed past here. */
2507 #ifdef DBX_DEBUGGING_INFO
2508 if (write_symbols == DBX_DEBUG)
2509 TIMEVAR (symout_time, dbxout_function (decl));
2512 #ifdef DWARF_DEBUGGING_INFO
2513 if (write_symbols == DWARF_DEBUG)
2514 TIMEVAR (symout_time, dwarfout_file_scope_decl (decl, 0));
2517 exit_rest_of_compilation:
2519 /* In case the function was not output,
2520 don't leave any temporary anonymous types
2521 queued up for sdb output. */
2522 #ifdef SDB_DEBUGGING_INFO
2523 if (write_symbols == SDB_DEBUG)
2527 /* Put back the tree of subblocks from before we copied it.
2528 Code generation and the output of debugging info may have modified
2529 the copy, but the original is unchanged. */
2531 if (saved_block_tree != 0)
2532 DECL_INITIAL (decl) = saved_block_tree;
2534 reload_completed = 0;
2536 /* Clear out the real_constant_chain before some of the rtx's
2537 it runs through become garbage. */
2539 clear_const_double_mem ();
2541 /* Cancel the effect of rtl_in_current_obstack. */
2543 resume_temporary_allocation ();
2545 /* The parsing time is all the time spent in yyparse
2546 *except* what is spent in this function. */
2548 parse_time -= get_run_time () - start_time;
2551 /* Entry point of cc1/c++. Decode command args, then call compile_file.
2552 Exit code is 35 if can't open files, 34 if fatal error,
2553 33 if had nonfatal errors, else success. */
2556 main (argc, argv, envp)
2563 int flag_print_mem = 0;
2564 int version_flag = 0;
2567 /* save in case md file wants to emit args as a comment. */
2571 p = argv[0] + strlen (argv[0]);
2572 while (p != argv[0] && p[-1] != '/') --p;
2576 /* Get rid of any avoidable limit on stack size. */
2580 /* Set the stack limit huge so that alloca does not fail. */
2581 getrlimit (RLIMIT_STACK, &rlim);
2582 rlim.rlim_cur = rlim.rlim_max;
2583 setrlimit (RLIMIT_STACK, &rlim);
2585 #endif /* RLIMIT_STACK */
2587 signal (SIGFPE, float_signal);
2589 signal (SIGPIPE, pipe_closed);
2591 decl_printable_name = decl_name;
2592 lang_expand_expr = (struct rtx_def *(*)()) do_abort;
2594 /* Initialize whether `char' is signed. */
2595 flag_signed_char = DEFAULT_SIGNED_CHAR;
2596 #ifdef DEFAULT_SHORT_ENUMS
2597 /* Initialize how much space enums occupy, by default. */
2598 flag_short_enums = DEFAULT_SHORT_ENUMS;
2601 /* Scan to see what optimization level has been specified. That will
2602 determine the default value of many flags. */
2603 for (i = 1; i < argc; i++)
2605 if (!strcmp (argv[i], "-O"))
2609 else if (argv[i][0] == '-' && argv[i][1] == 'O')
2611 /* Handle -O2, -O3, -O69, ... */
2612 char *p = &argv[i][2];
2616 if (! (c >= '0' && c <= '9'))
2619 optimize = atoi (&argv[i][2]);
2623 obey_regdecls = (optimize == 0);
2632 flag_thread_jumps = 1;
2634 flag_delayed_branch = 1;
2640 flag_cse_follow_jumps = 1;
2641 flag_cse_skip_blocks = 1;
2642 flag_expensive_optimizations = 1;
2643 flag_strength_reduce = 1;
2644 flag_rerun_cse_after_loop = 1;
2645 flag_caller_saves = 1;
2646 #ifdef INSN_SCHEDULING
2647 flag_schedule_insns = 1;
2648 flag_schedule_insns_after_reload = 1;
2652 #ifdef OPTIMIZATION_OPTIONS
2653 /* Allow default optimizations to be specified on a per-machine basis. */
2654 OPTIMIZATION_OPTIONS (optimize);
2657 /* Initialize register usage now so switches may override. */
2661 set_target_switch ("");
2663 for (i = 1; i < argc; i++)
2665 if (argv[i][0] == '-' && argv[i][1] != 0)
2667 register char *str = argv[i] + 1;
2672 set_target_switch (&str[1]);
2673 else if (!strcmp (str, "dumpbase"))
2675 dump_base_name = argv[++i];
2677 else if (str[0] == 'd')
2679 register char *p = &str[1];
2687 global_reg_dump = 1;
2693 cse_dump = 1, cse2_dump = 1;
2711 global_reg_dump = 1;
2729 flag_print_asm_name = 1;
2751 rtl_dump_and_exit = 1;
2755 else if (str[0] == 'f')
2758 register char *p = &str[1];
2761 /* Some kind of -f option.
2762 P's value is the option sans `-f'.
2763 Search for it in the table of options. */
2766 !found && j < sizeof (f_options) / sizeof (f_options[0]);
2769 if (!strcmp (p, f_options[j].string))
2771 *f_options[j].variable = f_options[j].on_value;
2772 /* A goto here would be cleaner,
2773 but breaks the vax pcc. */
2776 if (p[0] == 'n' && p[1] == 'o' && p[2] == '-'
2777 && ! strcmp (p+3, f_options[j].string))
2779 *f_options[j].variable = ! f_options[j].on_value;
2786 else if (!strncmp (p, "fixed-", 6))
2787 fix_register (&p[6], 1, 1);
2788 else if (!strncmp (p, "call-used-", 10))
2789 fix_register (&p[10], 0, 1);
2790 else if (!strncmp (p, "call-saved-", 11))
2791 fix_register (&p[11], 0, 0);
2792 else if (! lang_decode_option (argv[i]))
2793 error ("Invalid option `%s'", argv[i]);
2795 else if (str[0] == 'O')
2797 register char *p = str+1;
2798 while (*p && *p >= '0' && *p <= '9')
2803 error ("Invalid option `%s'", argv[i]);
2805 else if (!strcmp (str, "pedantic"))
2807 else if (!strcmp (str, "pedantic-errors"))
2808 flag_pedantic_errors = pedantic = 1;
2809 else if (lang_decode_option (argv[i]))
2811 else if (!strcmp (str, "quiet"))
2813 else if (!strcmp (str, "version"))
2815 else if (!strcmp (str, "w"))
2816 inhibit_warnings = 1;
2817 else if (!strcmp (str, "W"))
2820 warn_uninitialized = 1;
2822 else if (str[0] == 'W')
2825 register char *p = &str[1];
2828 /* Some kind of -W option.
2829 P's value is the option sans `-W'.
2830 Search for it in the table of options. */
2833 !found && j < sizeof (W_options) / sizeof (W_options[0]);
2836 if (!strcmp (p, W_options[j].string))
2838 *W_options[j].variable = W_options[j].on_value;
2839 /* A goto here would be cleaner,
2840 but breaks the vax pcc. */
2843 if (p[0] == 'n' && p[1] == 'o' && p[2] == '-'
2844 && ! strcmp (p+3, W_options[j].string))
2846 *W_options[j].variable = ! W_options[j].on_value;
2853 else if (!strncmp (p, "id-clash-", 9))
2859 if (*endp >= '0' && *endp <= '9')
2862 error ("Invalid option `%s'", argv[i]);
2865 id_clash_len = atoi (str + 10);
2868 error ("Invalid option `%s'", argv[i]);
2870 else if (!strcmp (str, "p"))
2872 else if (!strcmp (str, "a"))
2874 #if !defined (BLOCK_PROFILER) || !defined (FUNCTION_BLOCK_PROFILER)
2875 warning ("`-a' option (basic block profile) not supported");
2877 profile_block_flag = 1;
2880 else if (str[0] == 'g')
2887 while (*p && (*p < '0' || *p > '9'))
2891 while (*q && (*q >= '0' && *q <= '9'))
2896 level = 2; /* default debugging info level */
2897 if (*q || level > 3)
2899 warning ("invalid debug level specification in option: `-%s'",
2901 warning ("no debugging information will be generated");
2905 /* If more than one debugging type is supported,
2906 you must define PREFERRED_DEBUGGING_TYPE
2907 to choose a format in a system-dependent way. */
2908 #if 1 < (defined (DBX_DEBUGGING_INFO) + defined (SDB_DEBUGGING_INFO) \
2909 + defined (DWARF_DEBUGGING_INFO) + defined (XCOFF_DEBUGGING_INFO))
2910 #ifdef PREFERRED_DEBUGGING_TYPE
2911 if (!strncmp (str, "ggdb", len))
2912 write_symbols = PREFERRED_DEBUGGING_TYPE;
2913 #else /* no PREFERRED_DEBUGGING_TYPE */
2914 You Lose! You must define PREFERRED_DEBUGGING_TYPE!
2915 #endif /* no PREFERRED_DEBUGGING_TYPE */
2916 #endif /* More than one debugger format enabled. */
2917 #ifdef DBX_DEBUGGING_INFO
2918 if (write_symbols != NO_DEBUG)
2920 else if (!strncmp (str, "ggdb", len))
2921 write_symbols = DBX_DEBUG;
2922 else if (!strncmp (str, "gstabs", len))
2923 write_symbols = DBX_DEBUG;
2925 /* Always enable extensions for -ggdb or -gstabs+,
2926 always disable for -gstabs.
2927 For plain -g, use system-specific default. */
2928 if (write_symbols == DBX_DEBUG && !strncmp (str, "ggdb", len)
2930 use_gdb_dbx_extensions = 1;
2931 else if (write_symbols == DBX_DEBUG && !strcmp (str, "gstabs+"))
2932 use_gdb_dbx_extensions = 1;
2933 else if (write_symbols == DBX_DEBUG
2934 && !strncmp (str, "gstabs", len) && len >= 2)
2935 use_gdb_dbx_extensions = 0;
2937 use_gdb_dbx_extensions = DEFAULT_GDB_EXTENSIONS;
2938 #endif /* DBX_DEBUGGING_INFO */
2939 #ifdef DWARF_DEBUGGING_INFO
2940 if (write_symbols != NO_DEBUG)
2942 else if (!strncmp (str, "ggdb", len))
2943 write_symbols = DWARF_DEBUG;
2944 /* For orthogonality. */
2945 else if (!strncmp (str, "gdwarf", len))
2946 write_symbols = DWARF_DEBUG;
2948 #ifdef SDB_DEBUGGING_INFO
2949 if (write_symbols != NO_DEBUG)
2951 else if (!strncmp (str, "ggdb", len))
2952 write_symbols = SDB_DEBUG;
2953 else if (!strncmp (str, "gcoff", len))
2954 write_symbols = SDB_DEBUG;
2955 #endif /* SDB_DEBUGGING_INFO */
2956 #ifdef XCOFF_DEBUGGING_INFO
2957 if (write_symbols != NO_DEBUG)
2959 else if (!strncmp (str, "ggdb", len))
2960 write_symbols = XCOFF_DEBUG;
2961 else if (!strncmp (str, "gxcoff", len))
2962 write_symbols = XCOFF_DEBUG;
2964 /* Always enable extensions for -ggdb,
2965 always disable for -gxcoff.
2966 For plain -g, use system-specific default. */
2967 if (write_symbols == XCOFF_DEBUG && !strncmp (str, "ggdb", len)
2969 use_gdb_dbx_extensions = 1;
2970 else if (write_symbols == XCOFF_DEBUG
2971 && !strncmp (str, "gxcoff", len) && len >= 2)
2972 use_gdb_dbx_extensions = 0;
2974 use_gdb_dbx_extensions = DEFAULT_GDB_EXTENSIONS;
2976 if (write_symbols == NO_DEBUG)
2977 warning ("`-%s' option not supported on this version of GCC", str);
2978 else if (level == 0)
2979 write_symbols = NO_DEBUG;
2981 debug_info_level = (enum debug_info_level) level;
2983 else if (!strcmp (str, "o"))
2985 asm_file_name = argv[++i];
2987 else if (str[0] == 'G')
2989 g_switch_set = TRUE;
2990 g_switch_value = atoi ((str[1] != '\0') ? str+1 : argv[++i]);
2992 else if (!strncmp (str, "aux-info", 8))
2994 flag_gen_aux_info = 1;
2995 aux_info_file_name = (str[8] != '\0' ? str+8 : argv[++i]);
2998 error ("Invalid option `%s'", argv[i]);
3000 else if (argv[i][0] == '+')
3002 if (lang_decode_option (argv[i]))
3005 error ("Invalid option `%s'", argv[i]);
3011 /* Inlining does not work if not optimizing,
3012 so force it not to be done. */
3019 #ifdef OVERRIDE_OPTIONS
3020 /* Some machines may reject certain combinations of options. */
3024 /* Unrolling all loops implies that standard loop unrolling must also
3026 if (flag_unroll_all_loops)
3027 flag_unroll_loops = 1;
3028 /* Loop unrolling requires that strength_reduction be on also. Silently
3029 turn on strength reduction here if it isn't already on. Also, the loop
3030 unrolling code assumes that cse will be run after loop, so that must
3031 be turned on also. */
3032 if (flag_unroll_loops)
3034 flag_strength_reduce = 1;
3035 flag_rerun_cse_after_loop = 1;
3038 /* Warn about options that are not supported on this machine. */
3039 #ifndef INSN_SCHEDULING
3040 if (flag_schedule_insns || flag_schedule_insns_after_reload)
3041 warning ("instruction scheduling not supported on this target machine");
3044 if (flag_delayed_branch)
3045 warning ("this target machine does not have delayed branches");
3048 /* If we are in verbose mode, write out the version and maybe all the
3049 option flags in use. */
3052 fprintf (stderr, "%s version %s", language_string, version_string);
3053 #ifdef TARGET_VERSION
3058 #define __VERSION__ "[unknown]"
3060 fprintf (stderr, " compiled by GNU C version %s.\n", __VERSION__);
3062 fprintf (stderr, " compiled by CC.\n");
3065 print_switch_values ();
3068 /* Now that register usage is specified, convert it to HARD_REG_SETs. */
3071 compile_file (filename);
3077 char *lim = (char *) sbrk (0);
3079 fprintf (stderr, "Data size %d.\n",
3080 (int) lim - (int) &environ);
3084 system ("ps -l 1>&2");
3087 #endif /* not USG */
3089 #endif /* not VMS */
3090 #endif /* not OS2 */
3093 exit (FATAL_EXIT_CODE);
3095 exit (FATAL_EXIT_CODE);
3096 exit (SUCCESS_EXIT_CODE);
3100 /* Decode -m switches. */
3102 /* Here is a table, controlled by the tm.h file, listing each -m switch
3103 and which bits in `target_switches' it should set or clear.
3104 If VALUE is positive, it is bits to set.
3105 If VALUE is negative, -VALUE is bits to clear.
3106 (The sign bit is not used so there is no confusion.) */
3108 struct {char *name; int value;} target_switches []
3111 /* This table is similar, but allows the switch to have a value. */
3113 #ifdef TARGET_OPTIONS
3114 struct {char *prefix; char ** variable;} target_options []
3118 /* Decode the switch -mNAME. */
3121 set_target_switch (name)
3127 for (j = 0; j < sizeof target_switches / sizeof target_switches[0]; j++)
3128 if (!strcmp (target_switches[j].name, name))
3130 if (target_switches[j].value < 0)
3131 target_flags &= ~-target_switches[j].value;
3133 target_flags |= target_switches[j].value;
3137 #ifdef TARGET_OPTIONS
3139 for (j = 0; j < sizeof target_options / sizeof target_options[0]; j++)
3141 int len = strlen (target_options[j].prefix);
3142 if (!strncmp (target_options[j].prefix, name, len))
3144 *target_options[j].variable = name + len;
3151 error ("Invalid option `%s'", name);
3154 /* Variable used for communication between the following two routines. */
3156 static int line_position;
3158 /* Print an option value and adjust the position in the line. */
3161 print_single_switch (type, name)
3164 fprintf (stderr, " %s%s", type, name);
3166 line_position += strlen (type) + strlen (name) + 1;
3168 if (line_position > 65)
3170 fprintf (stderr, "\n\t");
3175 /* Print default target switches for -version. */
3178 print_switch_values ()
3182 fprintf (stderr, "enabled:");
3185 for (j = 0; j < sizeof f_options / sizeof f_options[0]; j++)
3186 if (*f_options[j].variable == f_options[j].on_value)
3187 print_single_switch ("-f", f_options[j].string);
3189 for (j = 0; j < sizeof W_options / sizeof W_options[0]; j++)
3190 if (*W_options[j].variable == W_options[j].on_value)
3191 print_single_switch ("-W", W_options[j].string);
3193 for (j = 0; j < sizeof target_switches / sizeof target_switches[0]; j++)
3194 if (target_switches[j].name[0] != '\0'
3195 && target_switches[j].value > 0
3196 && ((target_switches[j].value & target_flags)
3197 == target_switches[j].value))
3198 print_single_switch ("-m", target_switches[j].name);
3200 fprintf (stderr, "\n");