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 #if ! (defined (VMS) || defined (OS2))
81 extern char **environ;
83 extern char *version_string, *language_string;
85 extern void init_lex ();
86 extern void init_decl_processing ();
87 extern void init_obstacks ();
88 extern void init_tree_codes ();
89 extern void init_rtl ();
90 extern void init_optabs ();
91 extern void init_stmt ();
92 extern void init_reg_sets ();
93 extern void dump_flow_info ();
94 extern void dump_sched_info ();
95 extern void dump_local_alloc ();
97 void rest_of_decl_compilation ();
99 void error_with_file_and_line ();
104 void set_target_switch ();
105 static void print_switch_values ();
106 static char *decl_name ();
108 /* Name of program invoked, sans directories. */
112 /* Copy of arguments to main. */
116 /* Name of current original source file (what was input to cpp).
117 This comes from each #-command in the actual input. */
119 char *input_filename;
121 /* Name of top-level original source file (what was input to cpp).
122 This comes from the #-command at the beginning of the actual input.
123 If there isn't any there, then this is the cc1 input file name. */
125 char *main_input_filename;
127 /* Stream for reading from the input file. */
131 /* Current line number in real source file. */
135 /* Stack of currently pending input files. */
137 struct file_stack *input_file_stack;
139 /* Incremented on each change to input_file_stack. */
140 int input_file_stack_tick;
142 /* FUNCTION_DECL for function now being parsed or compiled. */
144 extern tree current_function_decl;
146 /* Name to use as base of names for dump output files. */
148 char *dump_base_name;
150 /* Bit flags that specify the machine subtype we are compiling for.
151 Bits are tested using macros TARGET_... defined in the tm.h file
152 and set by `-m...' switches. Must be defined in rtlanal.c. */
154 extern int target_flags;
156 /* Flags saying which kinds of debugging dump have been requested. */
159 int rtl_dump_and_exit = 0;
160 int jump_opt_dump = 0;
165 int combine_dump = 0;
167 int local_reg_dump = 0;
168 int global_reg_dump = 0;
170 int jump2_opt_dump = 0;
171 int dbr_sched_dump = 0;
172 int flag_print_asm_name = 0;
173 int stack_reg_dump = 0;
175 /* Name for output file of assembly code, specified with -o. */
179 /* Value of the -G xx switch, and whether it was passed or not. */
183 /* Type(s) of debugging information we are producing (if any).
184 See flags.h for the definitions of the different possible
185 types of debugging information. */
186 enum debug_info_type write_symbols = NO_DEBUG;
188 /* Level of debugging information we are producing. See flags.h
189 for the definitions of the different possible levels. */
190 enum debug_info_level debug_info_level = DINFO_LEVEL_NONE;
192 /* Nonzero means use GNU-only extensions in the generated symbolic
193 debugging information. */
194 /* Currently, this only has an effect when write_symbols is set to
195 DBX_DEBUG, XCOFF_DEBUG, or DWARF_DEBUG. */
196 int use_gnu_debug_info_extensions = 0;
198 /* Nonzero means do optimizations. -O.
199 Particular numeric values stand for particular amounts of optimization;
200 thus, -O2 stores 2 here. However, the optimizations beyond the basic
201 ones are not controlled directly by this variable. Instead, they are
202 controlled by individual `flag_...' variables that are defaulted
203 based on this variable. */
207 /* Number of error messages and warning messages so far. */
210 int warningcount = 0;
213 /* Pointer to function to compute the name to use to print a declaration. */
215 char *(*decl_printable_name) ();
217 /* Pointer to function to compute rtl for a language-specific tree code. */
219 struct rtx_def *(*lang_expand_expr) ();
221 /* Nonzero if generating code to do profiling. */
223 int profile_flag = 0;
225 /* Nonzero if generating code to do profiling on a line-by-line basis. */
227 int profile_block_flag;
229 /* Nonzero for -pedantic switch: warn about anything
230 that standard spec forbids. */
234 /* Temporarily suppress certain warnings.
235 This is set while reading code from a system header file. */
237 int in_system_header = 0;
239 /* Nonzero means do stupid register allocation.
240 Currently, this is 1 if `optimize' is 0. */
242 int obey_regdecls = 0;
244 /* Don't print functions as they are compiled and don't print
245 times taken by the various passes. -quiet. */
251 /* Nonzero means `char' should be signed. */
253 int flag_signed_char;
255 /* Nonzero means give an enum type only as many bytes as it needs. */
257 int flag_short_enums;
259 /* Nonzero for -fcaller-saves: allocate values in regs that need to
260 be saved across function calls, if that produces overall better code.
261 Optional now, so people can test it. */
263 #ifdef DEFAULT_CALLER_SAVES
264 int flag_caller_saves = 1;
266 int flag_caller_saves = 0;
269 /* Nonzero for -fpcc-struct-return: return values the same way PCC does. */
271 int flag_pcc_struct_return = 0;
273 /* Nonzero for -fforce-mem: load memory value into a register
274 before arithmetic on it. This makes better cse but slower compilation. */
276 int flag_force_mem = 0;
278 /* Nonzero for -fforce-addr: load memory address into a register before
279 reference to memory. This makes better cse but slower compilation. */
281 int flag_force_addr = 0;
283 /* Nonzero for -fdefer-pop: don't pop args after each function call;
284 instead save them up to pop many calls' args with one insns. */
286 int flag_defer_pop = 1;
288 /* Nonzero for -ffloat-store: don't allocate floats and doubles
289 in extended-precision registers. */
291 int flag_float_store = 0;
293 /* Nonzero for -fcse-follow-jumps:
294 have cse follow jumps to do a more extensive job. */
296 int flag_cse_follow_jumps;
298 /* Nonzero for -fcse-skip-blocks:
299 have cse follow a branch around a block. */
300 int flag_cse_skip_blocks;
302 /* Nonzero for -fexpensive-optimizations:
303 perform miscellaneous relatively-expensive optimizations. */
304 int flag_expensive_optimizations;
306 /* Nonzero for -fthread-jumps:
307 have jump optimize output of loop. */
309 int flag_thread_jumps;
311 /* Nonzero enables strength-reduction in loop.c. */
313 int flag_strength_reduce = 0;
315 /* Nonzero enables loop unrolling in unroll.c. Only loops for which the
316 number of iterations can be calculated at compile-time (UNROLL_COMPLETELY,
317 UNROLL_MODULO) or at run-time (preconditioned to be UNROLL_MODULO) are
320 int flag_unroll_loops;
322 /* Nonzero enables loop unrolling in unroll.c. All loops are unrolled.
323 This is generally not a win. */
325 int flag_unroll_all_loops;
327 /* Nonzero for -fwritable-strings:
328 store string constants in data segment and don't uniquize them. */
330 int flag_writable_strings = 0;
332 /* Nonzero means don't put addresses of constant functions in registers.
333 Used for compiling the Unix kernel, where strange substitutions are
334 done on the assembly output. */
336 int flag_no_function_cse = 0;
338 /* Nonzero for -fomit-frame-pointer:
339 don't make a frame pointer in simple functions that don't require one. */
341 int flag_omit_frame_pointer = 0;
343 /* Nonzero to inhibit use of define_optimization peephole opts. */
345 int flag_no_peephole = 0;
347 /* Nonzero allows GCC to violate some IEEE or ANSI rules regarding math
348 operations in the interest of optimization. For example it allows
349 GCC to assume arguments to sqrt are nonnegative numbers, allowing
350 faster code for sqrt to be generated. */
352 int flag_fast_math = 0;
354 /* Nonzero means all references through pointers are volatile. */
358 /* Nonzero means just do syntax checking; don't output anything. */
360 int flag_syntax_only = 0;
362 /* Nonzero means to rerun cse after loop optimization. This increases
363 compilation time about 20% and picks up a few more common expressions. */
365 static int flag_rerun_cse_after_loop;
367 /* Nonzero for -finline-functions: ok to inline functions that look like
368 good inline candidates. */
370 int flag_inline_functions;
372 /* Nonzero for -fkeep-inline-functions: even if we make a function
373 go inline everywhere, keep its definition around for debugging
376 int flag_keep_inline_functions;
378 /* Nonzero means that functions declared `inline' will be treated
379 as `static'. Prevents generation of zillions of copies of unused
380 static inline functions; instead, `inlines' are written out
381 only when actually used. Used in conjunction with -g. Also
382 does the right thing with #pragma interface. */
386 /* Nonzero means we should be saving declaration info into a .X file. */
388 int flag_gen_aux_info = 0;
390 /* Specified name of aux-info file. */
392 static char *aux_info_file_name;
394 /* Nonzero means make the text shared if supported. */
396 int flag_shared_data;
398 /* Nonzero means schedule into delayed branch slots if supported. */
400 int flag_delayed_branch;
402 /* Nonzero if we are compiling pure (sharable) code.
403 Value is 1 if we are doing reasonable (i.e. simple
404 offset into offset table) pic. Value is 2 if we can
405 only perform register offsets. */
409 /* Nonzero means place uninitialized global data in the bss section. */
413 /* Nonzero means pretend it is OK to examine bits of target floats,
414 even if that isn't true. The resulting code will have incorrect constants,
415 but the same series of instructions that the native compiler would make. */
417 int flag_pretend_float;
419 /* Nonzero means change certain warnings into errors.
420 Usually these are warnings about failure to conform to some standard. */
422 int flag_pedantic_errors = 0;
424 /* flag_schedule_insns means schedule insns within basic blocks (before
426 flag_schedule_insns_after_reload means schedule insns after
429 int flag_schedule_insns = 0;
430 int flag_schedule_insns_after_reload = 0;
432 /* -finhibit-size-directive inhibits output of .size for ELF.
433 This is used only for compiling crtstuff.c,
434 and it may be extended to other effects
435 needed for crtstuff.c on other systems. */
436 int flag_inhibit_size_directive = 0;
438 /* -fverbose-asm causes extra commentary information to be produced in
439 the generated assembly code (to make it more readable). This option
440 is generally only of use to those who actually need to read the
441 generated assembly code (perhaps while debugging the compiler itself). */
443 int flag_verbose_asm = 0;
445 /* -fgnu-linker specifies use of the GNU linker for initializations.
446 (Or, more generally, a linker that handles initializations.)
447 -fno-gnu-linker says that collect2 will be used. */
449 int flag_gnu_linker = 0;
451 int flag_gnu_linker = 1;
454 /* Table of language-independent -f options.
455 STRING is the option name. VARIABLE is the address of the variable.
456 ON_VALUE is the value to store in VARIABLE
457 if `-fSTRING' is seen as an option.
458 (If `-fno-STRING' is seen as an option, the opposite value is stored.) */
460 struct { char *string; int *variable; int on_value;} f_options[] =
462 {"float-store", &flag_float_store, 1},
463 {"volatile", &flag_volatile, 1},
464 {"defer-pop", &flag_defer_pop, 1},
465 {"omit-frame-pointer", &flag_omit_frame_pointer, 1},
466 {"cse-follow-jumps", &flag_cse_follow_jumps, 1},
467 {"cse-skip-blocks", &flag_cse_skip_blocks, 1},
468 {"expensive-optimizations", &flag_expensive_optimizations, 1},
469 {"thread-jumps", &flag_thread_jumps, 1},
470 {"strength-reduce", &flag_strength_reduce, 1},
471 {"unroll-loops", &flag_unroll_loops, 1},
472 {"unroll-all-loops", &flag_unroll_all_loops, 1},
473 {"writable-strings", &flag_writable_strings, 1},
474 {"peephole", &flag_no_peephole, 0},
475 {"force-mem", &flag_force_mem, 1},
476 {"force-addr", &flag_force_addr, 1},
477 {"function-cse", &flag_no_function_cse, 0},
478 {"inline-functions", &flag_inline_functions, 1},
479 {"keep-inline-functions", &flag_keep_inline_functions, 1},
480 {"inline", &flag_no_inline, 0},
481 {"syntax-only", &flag_syntax_only, 1},
482 {"shared-data", &flag_shared_data, 1},
483 {"caller-saves", &flag_caller_saves, 1},
484 {"pcc-struct-return", &flag_pcc_struct_return, 1},
485 {"delayed-branch", &flag_delayed_branch, 1},
486 {"rerun-cse-after-loop", &flag_rerun_cse_after_loop, 1},
487 {"pretend-float", &flag_pretend_float, 1},
488 {"schedule-insns", &flag_schedule_insns, 1},
489 {"schedule-insns2", &flag_schedule_insns_after_reload, 1},
490 {"pic", &flag_pic, 1},
491 {"PIC", &flag_pic, 2},
492 {"fast-math", &flag_fast_math, 1},
493 {"common", &flag_no_common, 0},
494 {"inhibit-size-directive", &flag_inhibit_size_directive, 1},
495 {"verbose-asm", &flag_verbose_asm, 1},
496 {"gnu-linker", &flag_gnu_linker, 1}
499 /* Table of language-specific options. */
501 char *lang_options[] =
510 "-fno-unsigned-char",
511 "-fsigned-bitfields",
512 "-funsigned-bitfields",
513 "-fno-signed-bitfields",
514 "-fno-unsigned-bitfields",
518 "-fno-cond-mismatch",
531 "-Wno-write-strings",
535 "-Wno-pointer-arith",
536 "-Wstrict-prototypes",
537 "-Wno-strict-prototypes",
538 "-Wmissing-prototypes",
539 "-Wno-missing-prototypes",
541 "-Wno-redundant-decls",
543 "-Wno-nested-externs",
549 "-Wno-char-subscripts",
564 /* These are for C++. */
565 "-+e0", /* gcc.c tacks the `-' on the front. */
569 "-fno-save-memoized",
578 "-fthis-is-variable",
579 "-fno-this-is-variable",
580 "-fstrict-prototype",
581 "-fno-strict-prototype",
585 "-fno-memoize-lookups",
586 "-felide-constructors",
587 "-fno-elide-constructors",
590 "-fhandle-exceptions",
591 "-fno-handle-exceptions",
593 "-fno-ansi-exceptions",
594 "-fspring-exceptions",
595 "-fno-spring-exceptions",
597 "-fno-default-inline",
599 "-fno-enum-int-equiv",
605 "-fno-nonnull-objects",
609 "-Woverloaded-virtual",
610 "-Wno-overloaded-virtual",
613 "-Wtemplate-debugging",
614 "-Wno-template-debugging",
616 /* these are for obj c */
624 /* Options controlling warnings */
626 /* Don't print warning messages. -w. */
628 int inhibit_warnings = 0;
630 /* Print various extra warnings. -W. */
632 int extra_warnings = 0;
634 /* Treat warnings as errors. -Werror. */
636 int warnings_are_errors = 0;
638 /* Nonzero to warn about unused local variables. */
642 /* Nonzero to warn about variables used before they are initialized. */
644 int warn_uninitialized;
646 /* Nonzero means warn about all declarations which shadow others. */
650 /* Warn if a switch on an enum fails to have a case for every enum value. */
654 /* Nonzero means warn about function definitions that default the return type
655 or that use a null return and have a return-type other than void. */
657 int warn_return_type;
659 /* Nonzero means warn about pointer casts that increase the required
660 alignment of the target type (and might therefore lead to a crash
661 due to a misaligned access). */
665 /* Nonzero means warn about any identifiers that match in the first N
666 characters. The value N is in `id_clash_len'. */
671 /* Nonzero means warn if inline function is too large. */
675 /* Warn if a function returns an aggregate,
676 since there are often incompatible calling conventions for doing this. */
678 int warn_aggregate_return;
680 /* Likewise for -W. */
682 struct { char *string; int *variable; int on_value;} W_options[] =
684 {"unused", &warn_unused, 1},
685 {"error", &warnings_are_errors, 1},
686 {"shadow", &warn_shadow, 1},
687 {"switch", &warn_switch, 1},
688 {"aggregate-return", &warn_aggregate_return, 1},
689 {"cast-align", &warn_cast_align, 1},
690 {"uninitialized", &warn_uninitialized, 1},
691 {"inline", &warn_inline, 1}
694 /* Output files for assembler code (real compiler output)
695 and debugging dumps. */
700 FILE *jump_opt_dump_file;
702 FILE *loop_dump_file;
703 FILE *cse2_dump_file;
704 FILE *flow_dump_file;
705 FILE *combine_dump_file;
706 FILE *sched_dump_file;
707 FILE *local_reg_dump_file;
708 FILE *global_reg_dump_file;
709 FILE *sched2_dump_file;
710 FILE *jump2_opt_dump_file;
711 FILE *dbr_sched_dump_file;
712 FILE *stack_reg_dump_file;
714 /* Time accumulators, to count the total time spent in various passes. */
718 int integration_time;
726 int local_alloc_time;
727 int global_alloc_time;
730 int shorten_branch_time;
736 /* Return time used so far, in microseconds. */
745 struct rusage rusage;
750 int proc_system_time;
752 int child_system_time;
762 return (tms.tms_utime + tms.tms_stime) * (1000000 / HZ);
765 getrusage (0, &rusage);
766 return (rusage.ru_utime.tv_sec * 1000000 + rusage.ru_utime.tv_usec
767 + rusage.ru_stime.tv_sec * 1000000 + rusage.ru_stime.tv_usec);
770 return (vms_times.proc_user_time + vms_times.proc_system_time) * 10000;
775 #define TIMEVAR(VAR, BODY) \
776 do { int otime = get_run_time (); BODY; VAR += get_run_time () - otime; } while (0)
779 print_time (str, total)
784 "time in %s: %d.%06d\n",
785 str, total / 1000000, total % 1000000);
788 /* Count an error or warning. Return 1 if the message should be printed. */
791 count_error (warningp)
794 if (warningp && inhibit_warnings)
797 if (warningp && !warnings_are_errors)
801 static int warning_message = 0;
803 if (warningp && !warning_message)
805 fprintf (stderr, "%s: warnings being treated as errors\n", progname);
814 /* Print a fatal error message. NAME is the text.
815 Also include a system error message based on `errno'. */
818 pfatal_with_name (name)
821 fprintf (stderr, "%s: ", progname);
827 fatal_io_error (name)
830 fprintf (stderr, "%s: %s: I/O error\n", progname, name);
843 /* Called to give a better error message when we don't have an insn to match
844 what we are looking for or if the insn's constraints aren't satisfied,
845 rather than just calling abort(). */
848 fatal_insn_not_found (insn)
851 if (INSN_CODE (insn) < 0)
852 error ("internal error--unrecognizable insn:", 0);
854 error ("internal error--insn does not satisfy its constraints:", 0);
857 fflush (asm_out_file);
859 fflush (aux_info_file);
861 fflush (rtl_dump_file);
862 if (jump_opt_dump_file)
863 fflush (jump_opt_dump_file);
865 fflush (cse_dump_file);
867 fflush (loop_dump_file);
869 fflush (cse2_dump_file);
871 fflush (flow_dump_file);
872 if (combine_dump_file)
873 fflush (combine_dump_file);
875 fflush (sched_dump_file);
876 if (local_reg_dump_file)
877 fflush (local_reg_dump_file);
878 if (global_reg_dump_file)
879 fflush (global_reg_dump_file);
880 if (sched2_dump_file)
881 fflush (sched2_dump_file);
882 if (jump2_opt_dump_file)
883 fflush (jump2_opt_dump_file);
884 if (dbr_sched_dump_file)
885 fflush (dbr_sched_dump_file);
886 if (stack_reg_dump_file)
887 fflush (stack_reg_dump_file);
891 /* This is the default decl_printable_name function. */
894 decl_name (decl, kind)
898 return IDENTIFIER_POINTER (DECL_NAME (decl));
901 static int need_error_newline;
903 /* Function of last error message;
904 more generally, function such that if next error message is in it
905 then we don't have to mention the function name. */
906 static tree last_error_function = NULL;
908 /* Used to detect when input_file_stack has changed since last described. */
909 static int last_error_tick;
911 /* Called when the start of a function definition is parsed,
912 this function prints on stderr the name of the function. */
915 announce_function (decl)
921 if (rtl_dump_and_exit)
922 fprintf (stderr, "%s ", IDENTIFIER_POINTER (DECL_NAME (decl)));
924 fprintf (stderr, " %s", (*decl_printable_name) (decl, &junk));
926 need_error_newline = 1;
927 last_error_function = current_function_decl;
931 /* Prints out, if necessary, the name of the current function
932 which caused an error. Called from all error and warning functions. */
935 report_error_function (file)
938 struct file_stack *p;
940 if (need_error_newline)
942 fprintf (stderr, "\n");
943 need_error_newline = 0;
946 if (last_error_function != current_function_decl)
948 char *kind = "function";
949 if (current_function_decl != 0
950 && TREE_CODE (TREE_TYPE (current_function_decl)) == METHOD_TYPE)
954 fprintf (stderr, "%s: ", file);
956 if (current_function_decl == NULL)
957 fprintf (stderr, "At top level:\n");
960 char *name = (*decl_printable_name) (current_function_decl, &kind);
961 fprintf (stderr, "In %s `%s':\n", kind, name);
964 last_error_function = current_function_decl;
966 if (input_file_stack && input_file_stack->next != 0
967 && input_file_stack_tick != last_error_tick)
969 fprintf (stderr, "In file included");
970 for (p = input_file_stack->next; p; p = p->next)
972 fprintf (stderr, " from %s:%d", p->name, p->line);
974 fprintf (stderr, ",");
976 fprintf (stderr, ":\n");
977 last_error_tick = input_file_stack_tick;
981 /* Report an error at the current line number.
982 S is a string and V and V2 are args for `printf'. We use HOST_WIDE_INT
983 as the type for these args assuming it is wide enough to hold a
984 pointer. This isn't terribly portable, but is the best we can do
985 without vprintf universally available. */
990 HOST_WIDE_INT v; /* Also used as pointer */
991 HOST_WIDE_INT v2; /* Also used as pointer */
993 error_with_file_and_line (input_filename, lineno, s, v, v2);
996 /* Report an error at line LINE of file FILE.
997 S and V are a string and an arg for `printf'. */
1000 error_with_file_and_line (file, line, s, v, v2)
1009 report_error_function (file);
1012 fprintf (stderr, "%s:%d: ", file, line);
1014 fprintf (stderr, "%s: ", progname);
1015 fprintf (stderr, s, v, v2);
1016 fprintf (stderr, "\n");
1019 /* Report an error at the declaration DECL.
1020 S and V are a string and an arg which uses %s to substitute
1021 the declaration name. */
1024 error_with_decl (decl, s, v)
1032 report_error_function (DECL_SOURCE_FILE (decl));
1034 fprintf (stderr, "%s:%d: ",
1035 DECL_SOURCE_FILE (decl), DECL_SOURCE_LINE (decl));
1037 if (DECL_NAME (decl))
1038 fprintf (stderr, s, (*decl_printable_name) (decl, &junk), v);
1040 fprintf (stderr, s, "((anonymous))", v);
1041 fprintf (stderr, "\n");
1044 /* Report an error at the line number of the insn INSN.
1045 S and V are a string and an arg for `printf'.
1046 This is used only when INSN is an `asm' with operands,
1047 and each ASM_OPERANDS records its own source file and line. */
1050 error_for_asm (insn, s, v, v2)
1053 HOST_WIDE_INT v; /* Also used as pointer */
1054 HOST_WIDE_INT v2; /* Also used as pointer */
1058 rtx body = PATTERN (insn);
1061 /* Find the (or one of the) ASM_OPERANDS in the insn. */
1062 if (GET_CODE (body) == SET && GET_CODE (SET_SRC (body)) == ASM_OPERANDS)
1063 asmop = SET_SRC (body);
1064 else if (GET_CODE (body) == ASM_OPERANDS)
1066 else if (GET_CODE (body) == PARALLEL
1067 && GET_CODE (XVECEXP (body, 0, 0)) == SET)
1068 asmop = SET_SRC (XVECEXP (body, 0, 0));
1069 else if (GET_CODE (body) == PARALLEL
1070 && GET_CODE (XVECEXP (body, 0, 0)) == ASM_OPERANDS)
1071 asmop = XVECEXP (body, 0, 0);
1073 filename = ASM_OPERANDS_SOURCE_FILE (asmop);
1074 line = ASM_OPERANDS_SOURCE_LINE (asmop);
1076 error_with_file_and_line (filename, line, s, v, v2);
1079 /* Report a warning at line LINE.
1080 S and V are a string and an arg for `printf'. */
1083 warning_with_file_and_line (file, line, s, v, v2, v3)
1087 HOST_WIDE_INT v, v2, v3;
1089 if (count_error (1) == 0)
1092 report_error_function (file);
1095 fprintf (stderr, "%s:%d: ", file, line);
1097 fprintf (stderr, "%s: ", progname);
1099 fprintf (stderr, "warning: ");
1100 fprintf (stderr, s, v, v2, v3);
1101 fprintf (stderr, "\n");
1104 /* Report a warning at the current line number.
1105 S and V are a string and an arg for `printf'. */
1108 warning (s, v, v2, v3)
1110 HOST_WIDE_INT v, v2, v3; /* Also used as pointer */
1112 warning_with_file_and_line (input_filename, lineno, s, v, v2, v3);
1115 /* Report a warning at the declaration DECL.
1116 S is string which uses %s to substitute the declaration name.
1117 V is a second parameter that S can refer to. */
1120 warning_with_decl (decl, s, v)
1127 if (count_error (1) == 0)
1130 report_error_function (DECL_SOURCE_FILE (decl));
1132 fprintf (stderr, "%s:%d: ",
1133 DECL_SOURCE_FILE (decl), DECL_SOURCE_LINE (decl));
1135 fprintf (stderr, "warning: ");
1136 if (DECL_NAME (decl))
1137 fprintf (stderr, s, (*decl_printable_name) (decl, &junk), v);
1139 fprintf (stderr, s, "((anonymous))", v);
1140 fprintf (stderr, "\n");
1143 /* Report a warning at the line number of the insn INSN.
1144 S and V are a string and an arg for `printf'.
1145 This is used only when INSN is an `asm' with operands,
1146 and each ASM_OPERANDS records its own source file and line. */
1149 warning_for_asm (insn, s, v, v2)
1152 HOST_WIDE_INT v; /* Also used as pointer */
1153 HOST_WIDE_INT v2; /* Also used as pointer */
1157 rtx body = PATTERN (insn);
1160 /* Find the (or one of the) ASM_OPERANDS in the insn. */
1161 if (GET_CODE (body) == SET && GET_CODE (SET_SRC (body)) == ASM_OPERANDS)
1162 asmop = SET_SRC (body);
1163 else if (GET_CODE (body) == ASM_OPERANDS)
1165 else if (GET_CODE (body) == PARALLEL
1166 && GET_CODE (XVECEXP (body, 0, 0)) == SET)
1167 asmop = SET_SRC (XVECEXP (body, 0, 0));
1168 else if (GET_CODE (body) == PARALLEL
1169 && GET_CODE (XVECEXP (body, 0, 0)) == ASM_OPERANDS)
1170 asmop = XVECEXP (body, 0, 0);
1172 filename = ASM_OPERANDS_SOURCE_FILE (asmop);
1173 line = ASM_OPERANDS_SOURCE_LINE (asmop);
1175 warning_with_file_and_line (filename, line, s, v, v2);
1178 /* These functions issue either warnings or errors depending on
1179 -pedantic-errors. */
1184 HOST_WIDE_INT v; /* Also used as pointer */
1187 if (flag_pedantic_errors)
1194 pedwarn_with_decl (decl, s, v)
1199 if (flag_pedantic_errors)
1200 error_with_decl (decl, s, v);
1202 warning_with_decl (decl, s, v);
1206 pedwarn_with_file_and_line (file, line, s, v, v2)
1213 if (flag_pedantic_errors)
1214 error_with_file_and_line (file, line, s, v, v2);
1216 warning_with_file_and_line (file, line, s, v, v2);
1219 /* Apologize for not implementing some feature.
1220 S, V, and V2 are a string and args for `printf'. */
1225 HOST_WIDE_INT v, v2;
1229 fprintf (stderr, "%s:%d: ", input_filename, lineno);
1231 fprintf (stderr, "%s: ", progname);
1233 fprintf (stderr, "sorry, not implemented: ");
1234 fprintf (stderr, s, v, v2);
1235 fprintf (stderr, "\n");
1238 /* Apologize for not implementing some feature, then quit.
1239 S, V, and V2 are a string and args for `printf'. */
1242 really_sorry (s, v, v2)
1244 HOST_WIDE_INT v, v2;
1247 fprintf (stderr, "%s:%d: ", input_filename, lineno);
1249 fprintf (stderr, "%s: ", progname);
1251 fprintf (stderr, "sorry, not implemented: ");
1252 fprintf (stderr, s, v, v2);
1253 fatal (" (fatal)\n");
1256 /* More 'friendly' abort that prints the line and file.
1257 config.h can #define abort fancy_abort if you like that sort of thing.
1259 I don't think this is actually a good idea.
1260 Other sorts of crashes will look a certain way.
1261 It is a good thing if crashes from calling abort look the same way.
1267 fatal ("internal gcc abort");
1270 /* This calls abort and is used to avoid problems when abort if a macro.
1271 It is used when we need to pass the address of abort. */
1279 /* When `malloc.c' is compiled with `rcheck' defined,
1280 it calls this function to report clobberage. */
1288 /* Same as `malloc' but report error if no memory available. */
1294 register char *value = (char *) malloc (size);
1296 fatal ("virtual memory exhausted");
1300 /* Same as `realloc' but report error if no memory available. */
1303 xrealloc (ptr, size)
1307 char *result = (char *) realloc (ptr, size);
1309 fatal ("virtual memory exhausted");
1313 /* Return the logarithm of X, base 2, considering X unsigned,
1314 if X is a power of 2. Otherwise, returns -1.
1316 This should be used via the `exact_log2' macro. */
1320 register unsigned HOST_WIDE_INT x;
1322 register int log = 0;
1323 /* Test for 0 or a power of 2. */
1324 if (x == 0 || x != (x & -x))
1326 while ((x >>= 1) != 0)
1331 /* Given X, an unsigned number, return the largest int Y such that 2**Y <= X.
1332 If X is 0, return -1.
1334 This should be used via the floor_log2 macro. */
1338 register unsigned HOST_WIDE_INT x;
1340 register int log = -1;
1348 jmp_buf float_handler;
1350 /* Specify where to longjmp to when a floating arithmetic error happens.
1351 If HANDLER is 0, it means don't handle the errors any more. */
1354 set_float_handler (handler)
1357 float_handled = (handler != 0);
1359 bcopy (handler, float_handler, sizeof (float_handler));
1362 /* Specify, in HANDLER, where to longjmp to when a floating arithmetic
1363 error happens, pushing the previous specification into OLD_HANDLER.
1364 Return an indication of whether there was a previous handler in effect. */
1367 push_float_handler (handler, old_handler)
1368 jmp_buf handler, old_handler;
1370 int was_handled = float_handled;
1374 bcopy (float_handler, old_handler, sizeof (float_handler));
1375 bcopy (handler, float_handler, sizeof (float_handler));
1379 /* Restore the previous specification of whether and where to longjmp to
1380 when a floating arithmetic error happens. */
1383 pop_float_handler (handled, handler)
1387 float_handled = handled;
1389 bcopy (handler, float_handler, sizeof (float_handler));
1392 /* Signals actually come here. */
1395 float_signal (signo)
1396 /* If this is missing, some compilers complain. */
1399 if (float_handled == 0)
1401 #if defined (USG) || defined (hpux)
1402 signal (SIGFPE, float_signal); /* re-enable the signal catcher */
1405 signal (SIGFPE, float_signal);
1406 longjmp (float_handler, 1);
1409 /* Handler for SIGPIPE. */
1413 /* If this is missing, some compilers complain. */
1416 fatal ("output pipe has been closed");
1419 /* Strip off a legitimate source ending from the input string NAME of
1423 strip_off_ending (name, len)
1427 if (len > 2 && ! strcmp (".c", name + len - 2))
1429 else if (len > 2 && ! strcmp (".m", name + len - 2))
1431 else if (len > 2 && ! strcmp (".i", name + len - 2))
1433 else if (len > 3 && ! strcmp (".ii", name + len - 3))
1435 else if (len > 3 && ! strcmp (".co", name + len - 3))
1437 else if (len > 3 && ! strcmp (".cc", name + len - 3))
1439 else if (len > 2 && ! strcmp (".C", name + len - 2))
1441 else if (len > 4 && ! strcmp (".cxx", name + len - 4))
1443 else if (len > 2 && ! strcmp (".f", name + len - 2))
1445 else if (len > 4 && ! strcmp (".ada", name + len - 4))
1449 /* Output a file name in the form wanted by System V. */
1452 output_file_directive (asm_file, input_name)
1456 int len = strlen (input_name);
1457 char *na = input_name + len;
1459 /* NA gets INPUT_NAME sans directory names. */
1460 while (na > input_name)
1467 #ifdef ASM_OUTPUT_MAIN_SOURCE_FILENAME
1468 ASM_OUTPUT_MAIN_SOURCE_FILENAME (asm_file, na);
1470 #ifdef ASM_OUTPUT_SOURCE_FILENAME
1471 ASM_OUTPUT_SOURCE_FILENAME (asm_file, na);
1473 fprintf (asm_file, "\t.file\t\"%s\"\n", na);
1478 /* Compile an entire file of output from cpp, named NAME.
1479 Write a file of assembly output and various debugging dumps. */
1487 int dump_base_name_length;
1489 int name_specified = name != 0;
1491 if (dump_base_name == 0)
1492 dump_base_name = name ? name : "gccdump";
1493 dump_base_name_length = strlen (dump_base_name);
1497 integration_time = 0;
1505 local_alloc_time = 0;
1506 global_alloc_time = 0;
1509 shorten_branch_time = 0;
1515 /* Open input file. */
1517 if (name == 0 || !strcmp (name, "-"))
1523 finput = fopen (name, "r");
1525 pfatal_with_name (name);
1527 #ifdef IO_BUFFER_SIZE
1528 setvbuf (finput, (char *) xmalloc (IO_BUFFER_SIZE), _IOFBF, IO_BUFFER_SIZE);
1531 /* Initialize data in various passes. */
1537 init_emit_once (debug_info_level == DINFO_LEVEL_NORMAL
1538 || debug_info_level == DINFO_LEVEL_VERBOSE);
1539 init_decl_processing ();
1547 if (flag_caller_saves)
1548 init_caller_save ();
1550 /* If auxiliary info generation is desired, open the output file.
1551 This goes in the same directory as the source file--unlike
1552 all the other output files. */
1553 if (flag_gen_aux_info)
1555 aux_info_file = fopen (aux_info_file_name, "w");
1556 if (aux_info_file == 0)
1557 pfatal_with_name (aux_info_file_name);
1560 /* If rtl dump desired, open the output file. */
1563 register char *dumpname = (char *) xmalloc (dump_base_name_length + 6);
1564 strcpy (dumpname, dump_base_name);
1565 strcat (dumpname, ".rtl");
1566 rtl_dump_file = fopen (dumpname, "w");
1567 if (rtl_dump_file == 0)
1568 pfatal_with_name (dumpname);
1571 /* If jump_opt dump desired, open the output file. */
1574 register char *dumpname = (char *) xmalloc (dump_base_name_length + 6);
1575 strcpy (dumpname, dump_base_name);
1576 strcat (dumpname, ".jump");
1577 jump_opt_dump_file = fopen (dumpname, "w");
1578 if (jump_opt_dump_file == 0)
1579 pfatal_with_name (dumpname);
1582 /* If cse dump desired, open the output file. */
1585 register char *dumpname = (char *) xmalloc (dump_base_name_length + 6);
1586 strcpy (dumpname, dump_base_name);
1587 strcat (dumpname, ".cse");
1588 cse_dump_file = fopen (dumpname, "w");
1589 if (cse_dump_file == 0)
1590 pfatal_with_name (dumpname);
1593 /* If loop dump desired, open the output file. */
1596 register char *dumpname = (char *) xmalloc (dump_base_name_length + 6);
1597 strcpy (dumpname, dump_base_name);
1598 strcat (dumpname, ".loop");
1599 loop_dump_file = fopen (dumpname, "w");
1600 if (loop_dump_file == 0)
1601 pfatal_with_name (dumpname);
1604 /* If cse2 dump desired, open the output file. */
1607 register char *dumpname = (char *) xmalloc (dump_base_name_length + 6);
1608 strcpy (dumpname, dump_base_name);
1609 strcat (dumpname, ".cse2");
1610 cse2_dump_file = fopen (dumpname, "w");
1611 if (cse2_dump_file == 0)
1612 pfatal_with_name (dumpname);
1615 /* If flow dump desired, open the output file. */
1618 register char *dumpname = (char *) xmalloc (dump_base_name_length + 6);
1619 strcpy (dumpname, dump_base_name);
1620 strcat (dumpname, ".flow");
1621 flow_dump_file = fopen (dumpname, "w");
1622 if (flow_dump_file == 0)
1623 pfatal_with_name (dumpname);
1626 /* If combine dump desired, open the output file. */
1629 register char *dumpname = (char *) xmalloc (dump_base_name_length + 10);
1630 strcpy (dumpname, dump_base_name);
1631 strcat (dumpname, ".combine");
1632 combine_dump_file = fopen (dumpname, "w");
1633 if (combine_dump_file == 0)
1634 pfatal_with_name (dumpname);
1637 /* If scheduling dump desired, open the output file. */
1640 register char *dumpname = (char *) xmalloc (dump_base_name_length + 7);
1641 strcpy (dumpname, dump_base_name);
1642 strcat (dumpname, ".sched");
1643 sched_dump_file = fopen (dumpname, "w");
1644 if (sched_dump_file == 0)
1645 pfatal_with_name (dumpname);
1648 /* If local_reg dump desired, open the output file. */
1651 register char *dumpname = (char *) xmalloc (dump_base_name_length + 6);
1652 strcpy (dumpname, dump_base_name);
1653 strcat (dumpname, ".lreg");
1654 local_reg_dump_file = fopen (dumpname, "w");
1655 if (local_reg_dump_file == 0)
1656 pfatal_with_name (dumpname);
1659 /* If global_reg dump desired, open the output file. */
1660 if (global_reg_dump)
1662 register char *dumpname = (char *) xmalloc (dump_base_name_length + 6);
1663 strcpy (dumpname, dump_base_name);
1664 strcat (dumpname, ".greg");
1665 global_reg_dump_file = fopen (dumpname, "w");
1666 if (global_reg_dump_file == 0)
1667 pfatal_with_name (dumpname);
1670 /* If 2nd scheduling dump desired, open the output file. */
1673 register char *dumpname = (char *) xmalloc (dump_base_name_length + 8);
1674 strcpy (dumpname, dump_base_name);
1675 strcat (dumpname, ".sched2");
1676 sched2_dump_file = fopen (dumpname, "w");
1677 if (sched2_dump_file == 0)
1678 pfatal_with_name (dumpname);
1681 /* If jump2_opt dump desired, open the output file. */
1684 register char *dumpname = (char *) xmalloc (dump_base_name_length + 7);
1685 strcpy (dumpname, dump_base_name);
1686 strcat (dumpname, ".jump2");
1687 jump2_opt_dump_file = fopen (dumpname, "w");
1688 if (jump2_opt_dump_file == 0)
1689 pfatal_with_name (dumpname);
1692 /* If dbr_sched dump desired, open the output file. */
1695 register char *dumpname = (char *) xmalloc (dump_base_name_length + 7);
1696 strcpy (dumpname, dump_base_name);
1697 strcat (dumpname, ".dbr");
1698 dbr_sched_dump_file = fopen (dumpname, "w");
1699 if (dbr_sched_dump_file == 0)
1700 pfatal_with_name (dumpname);
1705 /* If stack_reg dump desired, open the output file. */
1708 register char *dumpname = (char *) xmalloc (dump_base_name_length + 10);
1709 strcpy (dumpname, dump_base_name);
1710 strcat (dumpname, ".stack");
1711 stack_reg_dump_file = fopen (dumpname, "w");
1712 if (stack_reg_dump_file == 0)
1713 pfatal_with_name (dumpname);
1718 /* Open assembler code output file. */
1720 if (! name_specified && asm_file_name == 0)
1721 asm_out_file = stdout;
1724 register char *dumpname = (char *) xmalloc (dump_base_name_length + 6);
1725 int len = strlen (dump_base_name);
1726 strcpy (dumpname, dump_base_name);
1727 strip_off_ending (dumpname, len);
1728 strcat (dumpname, ".s");
1729 if (asm_file_name == 0)
1731 asm_file_name = (char *) xmalloc (strlen (dumpname) + 1);
1732 strcpy (asm_file_name, dumpname);
1734 if (!strcmp (asm_file_name, "-"))
1735 asm_out_file = stdout;
1737 asm_out_file = fopen (asm_file_name, "w");
1738 if (asm_out_file == 0)
1739 pfatal_with_name (asm_file_name);
1742 #ifdef IO_BUFFER_SIZE
1743 setvbuf (asm_out_file, (char *) xmalloc (IO_BUFFER_SIZE),
1744 _IOFBF, IO_BUFFER_SIZE);
1747 input_filename = name;
1749 /* Perform language-specific initialization.
1750 This may set main_input_filename. */
1753 /* If the input doesn't start with a #line, use the input name
1754 as the official input file name. */
1755 if (main_input_filename == 0)
1756 main_input_filename = name;
1758 /* Put an entry on the input file stack for the main input file. */
1760 = (struct file_stack *) xmalloc (sizeof (struct file_stack));
1761 input_file_stack->next = 0;
1762 input_file_stack->name = input_filename;
1764 ASM_FILE_START (asm_out_file);
1766 /* Output something to inform GDB that this compilation was by GCC. */
1767 #ifndef ASM_IDENTIFY_GCC
1768 fprintf (asm_out_file, "gcc2_compiled.:\n");
1770 ASM_IDENTIFY_GCC (asm_out_file);
1772 /* Don't let the first function fall at the same address
1773 as gcc_compiled., if profiling. */
1774 if (profile_flag || profile_block_flag)
1775 assemble_zeros (UNITS_PER_WORD);
1777 /* If dbx symbol table desired, initialize writing it
1778 and output the predefined types. */
1779 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
1780 if (write_symbols == DBX_DEBUG || write_symbols == XCOFF_DEBUG)
1781 TIMEVAR (symout_time, dbxout_init (asm_out_file, main_input_filename,
1784 #ifdef SDB_DEBUGGING_INFO
1785 if (write_symbols == SDB_DEBUG)
1786 TIMEVAR (symout_time, sdbout_init (asm_out_file, main_input_filename,
1789 #ifdef DWARF_DEBUGGING_INFO
1790 if (write_symbols == DWARF_DEBUG)
1791 TIMEVAR (symout_time, dwarfout_init (asm_out_file, main_input_filename));
1794 /* Initialize yet another pass. */
1796 init_final (main_input_filename);
1798 start_time = get_run_time ();
1800 /* Call the parser, which parses the entire file
1801 (calling rest_of_compilation for each function). */
1803 if (yyparse () != 0)
1804 if (errorcount == 0)
1805 fprintf (stderr, "Errors detected in input file (your bison.simple is out of date)");
1807 /* Compilation is now finished except for writing
1808 what's left of the symbol table output. */
1810 parse_time += get_run_time () - start_time;
1812 parse_time -= integration_time;
1813 parse_time -= varconst_time;
1815 globals = getdecls ();
1817 /* Really define vars that have had only a tentative definition.
1818 Really output inline functions that must actually be callable
1819 and have not been output so far. */
1822 int len = list_length (globals);
1823 tree *vec = (tree *) alloca (sizeof (tree) * len);
1827 /* Process the decls in reverse order--earliest first.
1828 Put them into VEC from back to front, then take out from front. */
1830 for (i = 0, decl = globals; i < len; i++, decl = TREE_CHAIN (decl))
1831 vec[len - i - 1] = decl;
1833 for (i = 0; i < len; i++)
1836 if (TREE_CODE (decl) == VAR_DECL && TREE_STATIC (decl)
1837 && ! TREE_ASM_WRITTEN (decl))
1839 /* Don't write out static consts, unless we used them.
1840 (This used to write them out only if the address was
1841 taken, but that was wrong; if the variable was simply
1842 referred to, it still needs to exist or else it will
1843 be undefined in the linker.) */
1844 if (! TREE_READONLY (decl)
1845 || TREE_PUBLIC (decl)
1847 || TREE_ADDRESSABLE (decl)
1848 || TREE_ADDRESSABLE (DECL_ASSEMBLER_NAME (decl)))
1849 rest_of_decl_compilation (decl, NULL_PTR, 1, 1);
1851 /* Cancel the RTL for this decl so that, if debugging info
1852 output for global variables is still to come,
1853 this one will be omitted. */
1854 DECL_RTL (decl) = NULL;
1857 if (TREE_CODE (decl) == FUNCTION_DECL
1858 && ! TREE_ASM_WRITTEN (decl)
1859 && DECL_INITIAL (decl) != 0
1860 && (TREE_ADDRESSABLE (decl)
1861 || TREE_ADDRESSABLE (DECL_ASSEMBLER_NAME (decl)))
1862 && ! DECL_EXTERNAL (decl))
1863 output_inline_function (decl);
1865 /* Warn about any function
1866 declared static but not defined.
1867 We don't warn about variables,
1868 because many programs have static variables
1869 that exist only to get some text into the object file. */
1872 || (DECL_NAME (decl) && TREE_USED (DECL_NAME (decl))))
1873 && TREE_CODE (decl) == FUNCTION_DECL
1874 && DECL_INITIAL (decl) == 0
1875 && DECL_EXTERNAL (decl)
1876 && ! TREE_PUBLIC (decl))
1877 warning_with_decl (decl, "`%s' declared `static' but never defined");
1878 /* Warn about static fns or vars defined but not used,
1879 but not about inline functions
1880 since unused inline statics is normal practice. */
1882 && (TREE_CODE (decl) == FUNCTION_DECL
1883 || TREE_CODE (decl) == VAR_DECL)
1884 && ! DECL_IN_SYSTEM_HEADER (decl)
1885 && ! DECL_EXTERNAL (decl)
1886 && ! TREE_PUBLIC (decl)
1887 && ! TREE_USED (decl)
1888 && ! DECL_INLINE (decl)
1889 /* The TREE_USED bit for file-scope decls
1890 is kept in the identifier, to handle multiple
1891 external decls in different scopes. */
1892 && ! TREE_USED (DECL_NAME (decl)))
1893 warning_with_decl (decl, "`%s' defined but not used");
1895 #ifdef SDB_DEBUGGING_INFO
1896 /* The COFF linker can move initialized global vars to the end.
1897 And that can screw up the symbol ordering.
1898 By putting the symbols in that order to begin with,
1899 we avoid a problem. mcsun!unido!fauern!tumuc!pes@uunet.uu.net. */
1900 if (write_symbols == SDB_DEBUG && TREE_CODE (decl) == VAR_DECL
1901 && TREE_PUBLIC (decl) && DECL_INITIAL (decl)
1902 && DECL_RTL (decl) != 0)
1903 TIMEVAR (symout_time, sdbout_symbol (decl, 0));
1905 /* Output COFF information for non-global
1906 file-scope initialized variables. */
1907 if (write_symbols == SDB_DEBUG
1908 && TREE_CODE (decl) == VAR_DECL
1909 && DECL_INITIAL (decl)
1910 && DECL_RTL (decl) != 0
1911 && GET_CODE (DECL_RTL (decl)) == MEM)
1912 TIMEVAR (symout_time, sdbout_toplevel_data (decl));
1913 #endif /* SDB_DEBUGGING_INFO */
1914 #ifdef DWARF_DEBUGGING_INFO
1915 /* Output DWARF information for file-scope tentative data object
1916 declarations, file-scope (extern) function declarations (which
1917 had no corresponding body) and file-scope tagged type declarations
1918 and definitions which have not yet been forced out. */
1920 if (write_symbols == DWARF_DEBUG
1921 && (TREE_CODE (decl) != FUNCTION_DECL || !DECL_INITIAL (decl)))
1922 TIMEVAR (symout_time, dwarfout_file_scope_decl (decl, 1));
1927 /* Do dbx symbols */
1928 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
1929 if (write_symbols == DBX_DEBUG || write_symbols == XCOFF_DEBUG)
1930 TIMEVAR (symout_time,
1932 dbxout_finish (asm_out_file, main_input_filename);
1936 #ifdef DWARF_DEBUGGING_INFO
1937 if (write_symbols == DWARF_DEBUG)
1938 TIMEVAR (symout_time,
1944 /* Output some stuff at end of file if nec. */
1946 end_final (main_input_filename);
1949 ASM_FILE_END (asm_out_file);
1952 after_finish_compilation:
1954 /* Language-specific end of compilation actions. */
1958 /* Close the dump files. */
1960 if (flag_gen_aux_info)
1962 fclose (aux_info_file);
1964 unlink (aux_info_file_name);
1968 fclose (rtl_dump_file);
1971 fclose (jump_opt_dump_file);
1974 fclose (cse_dump_file);
1977 fclose (loop_dump_file);
1980 fclose (cse2_dump_file);
1983 fclose (flow_dump_file);
1987 dump_combine_total_stats (combine_dump_file);
1988 fclose (combine_dump_file);
1992 fclose (sched_dump_file);
1995 fclose (local_reg_dump_file);
1997 if (global_reg_dump)
1998 fclose (global_reg_dump_file);
2001 fclose (sched2_dump_file);
2004 fclose (jump2_opt_dump_file);
2007 fclose (dbr_sched_dump_file);
2011 fclose (stack_reg_dump_file);
2014 /* Close non-debugging input and output files. Take special care to note
2015 whether fclose returns an error, since the pages might still be on the
2016 buffer chain while the file is open. */
2019 if (ferror (asm_out_file) != 0 || fclose (asm_out_file) != 0)
2020 fatal_io_error (asm_file_name);
2022 /* Print the times. */
2026 fprintf (stderr,"\n");
2027 print_time ("parse", parse_time);
2028 print_time ("integration", integration_time);
2029 print_time ("jump", jump_time);
2030 print_time ("cse", cse_time);
2031 print_time ("loop", loop_time);
2032 print_time ("cse2", cse2_time);
2033 print_time ("flow", flow_time);
2034 print_time ("combine", combine_time);
2035 print_time ("sched", sched_time);
2036 print_time ("local-alloc", local_alloc_time);
2037 print_time ("global-alloc", global_alloc_time);
2038 print_time ("sched2", sched2_time);
2039 print_time ("dbranch", dbr_sched_time);
2040 print_time ("shorten-branch", shorten_branch_time);
2041 print_time ("stack-reg", stack_reg_time);
2042 print_time ("final", final_time);
2043 print_time ("varconst", varconst_time);
2044 print_time ("symout", symout_time);
2045 print_time ("dump", dump_time);
2049 /* This is called from various places for FUNCTION_DECL, VAR_DECL,
2050 and TYPE_DECL nodes.
2052 This does nothing for local (non-static) variables.
2053 Otherwise, it sets up the RTL and outputs any assembler code
2054 (label definition, storage allocation and initialization).
2056 DECL is the declaration. If ASMSPEC is nonzero, it specifies
2057 the assembler symbol name to be used. TOP_LEVEL is nonzero
2058 if this declaration is not within a function. */
2061 rest_of_decl_compilation (decl, asmspec, top_level, at_end)
2067 /* Declarations of variables, and of functions defined elsewhere. */
2069 /* Forward declarations for nested functions are not "external",
2070 but we need to treat them as if they were. */
2071 if (TREE_STATIC (decl) || DECL_EXTERNAL (decl)
2072 || TREE_CODE (decl) == FUNCTION_DECL)
2073 TIMEVAR (varconst_time,
2075 make_decl_rtl (decl, asmspec, top_level);
2076 /* For a user-invisible decl that should be replaced
2077 by its value when used, don't output anything. */
2078 if (! (TREE_CODE (decl) == VAR_DECL
2079 && DECL_IGNORED_P (decl) && TREE_READONLY (decl)
2080 && DECL_INITIAL (decl) != 0))
2081 /* Don't output anything
2082 when a tentative file-scope definition is seen.
2083 But at end of compilation, do output code for them. */
2084 if (! (! at_end && top_level
2085 && (DECL_INITIAL (decl) == 0
2086 || DECL_INITIAL (decl) == error_mark_node
2087 || DECL_IGNORED_P (decl))))
2088 assemble_variable (decl, top_level, at_end);
2090 else if (DECL_REGISTER (decl) && asmspec != 0)
2092 if (decode_reg_name (asmspec) >= 0)
2094 DECL_RTL (decl) = 0;
2095 make_decl_rtl (decl, asmspec, top_level);
2098 error ("invalid register name `%s' for register variable", asmspec);
2100 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
2101 else if ((write_symbols == DBX_DEBUG || write_symbols == XCOFF_DEBUG)
2102 && TREE_CODE (decl) == TYPE_DECL)
2103 TIMEVAR (symout_time, dbxout_symbol (decl, 0));
2105 #ifdef SDB_DEBUGGING_INFO
2106 else if (write_symbols == SDB_DEBUG && top_level
2107 && TREE_CODE (decl) == TYPE_DECL)
2108 TIMEVAR (symout_time, sdbout_symbol (decl, 0));
2112 /* Called after finishing a record, union or enumeral type. */
2115 rest_of_type_compilation (type, toplev)
2119 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
2120 if (write_symbols == DBX_DEBUG || write_symbols == XCOFF_DEBUG)
2121 TIMEVAR (symout_time, dbxout_symbol (TYPE_STUB_DECL (type), !toplev));
2123 #ifdef SDB_DEBUGGING_INFO
2124 if (write_symbols == SDB_DEBUG)
2125 TIMEVAR (symout_time, sdbout_symbol (TYPE_STUB_DECL (type), !toplev));
2129 /* This is called from finish_function (within yyparse)
2130 after each top-level definition is parsed.
2131 It is supposed to compile that function or variable
2132 and output the assembler code for it.
2133 After we return, the tree storage is freed. */
2136 rest_of_compilation (decl)
2140 int start_time = get_run_time ();
2142 /* Nonzero if we have saved the original DECL_INITIAL of the function,
2143 to be restored after we finish compiling the function
2144 (for use when compiling inline calls to this function). */
2145 tree saved_block_tree = 0;
2146 /* Likewise, for DECL_ARGUMENTS. */
2147 tree saved_arguments = 0;
2150 /* If we are reconsidering an inline function
2151 at the end of compilation, skip the stuff for making it inline. */
2153 if (DECL_SAVED_INSNS (decl) == 0)
2155 int specd = DECL_INLINE (decl);
2158 /* If requested, consider whether to make this function inline. */
2159 if (specd || flag_inline_functions)
2160 TIMEVAR (integration_time,
2162 lose = function_cannot_inline_p (decl);
2165 if (warn_inline && specd)
2166 warning_with_decl (decl, lose);
2167 DECL_INLINE (decl) = 0;
2170 DECL_INLINE (decl) = 1;
2173 insns = get_insns ();
2175 /* Dump the rtl code if we are dumping rtl. */
2180 fprintf (rtl_dump_file, "\n;; Function %s\n\n",
2181 IDENTIFIER_POINTER (DECL_NAME (decl)));
2182 if (DECL_SAVED_INSNS (decl))
2183 fprintf (rtl_dump_file, ";; (integrable)\n\n");
2184 print_rtl (rtl_dump_file, insns);
2185 fflush (rtl_dump_file);
2188 /* If function is inline, and we don't yet know whether to
2189 compile it by itself, defer decision till end of compilation.
2190 finish_compilation will call rest_of_compilation again
2191 for those functions that need to be output. */
2193 if (DECL_INLINE (decl)
2194 && ((! TREE_PUBLIC (decl) && ! TREE_ADDRESSABLE (decl)
2195 && ! flag_keep_inline_functions)
2196 || DECL_EXTERNAL (decl)))
2198 #ifdef DWARF_DEBUGGING_INFO
2199 /* Generate the DWARF info for the "abstract" instance
2200 of a function which we may later generate inlined and/or
2201 out-of-line instances of. */
2202 if (write_symbols == DWARF_DEBUG)
2204 set_decl_abstract_flags (decl, 1);
2205 TIMEVAR (symout_time, dwarfout_file_scope_decl (decl, 0));
2206 set_decl_abstract_flags (decl, 0);
2209 TIMEVAR (integration_time, save_for_inline_nocopy (decl));
2210 goto exit_rest_of_compilation;
2213 /* If we have to compile the function now, save its rtl and subdecls
2214 so that its compilation will not affect what others get. */
2215 if (DECL_INLINE (decl))
2217 #ifdef DWARF_DEBUGGING_INFO
2218 /* Generate the DWARF info for the "abstract" instance of
2219 a function which we will generate an out-of-line instance
2220 of almost immediately (and which we may also later generate
2221 various inlined instances of). */
2222 if (write_symbols == DWARF_DEBUG)
2224 set_decl_abstract_flags (decl, 1);
2225 TIMEVAR (symout_time, dwarfout_file_scope_decl (decl, 0));
2226 set_decl_abstract_flags (decl, 0);
2229 saved_block_tree = DECL_INITIAL (decl);
2230 saved_arguments = DECL_ARGUMENTS (decl);
2231 TIMEVAR (integration_time, save_for_inline_copying (decl));
2235 TREE_ASM_WRITTEN (decl) = 1;
2237 /* Now that integrate will no longer see our rtl, we need not distinguish
2238 between the return value of this function and the return value of called
2240 rtx_equal_function_value_matters = 0;
2242 /* Don't return yet if -Wreturn-type; we need to do jump_optimize. */
2243 if ((rtl_dump_and_exit || flag_syntax_only) && !warn_return_type)
2245 goto exit_rest_of_compilation;
2248 /* From now on, allocate rtl in current_obstack, not in saveable_obstack.
2249 Note that that may have been done above, in save_for_inline_copying.
2250 The call to resume_temporary_allocation near the end of this function
2251 goes back to the usual state of affairs. */
2253 rtl_in_current_obstack ();
2256 /* If we are doing position-independent code generation, now
2257 is the time to output special prologues and epilogues.
2258 We do not want to do this earlier, because it just clutters
2259 up inline functions with meaningless insns. */
2264 insns = get_insns ();
2266 /* Copy any shared structure that should not be shared. */
2268 unshare_all_rtl (insns);
2270 /* Instantiate all virtual registers. */
2272 instantiate_virtual_regs (current_function_decl, get_insns ());
2274 /* See if we have allocated stack slots that are not directly addressable.
2275 If so, scan all the insns and create explicit address computation
2276 for all references to such slots. */
2277 /* fixup_stack_slots (); */
2279 /* Do jump optimization the first time, if -opt.
2280 Also do it if -W, but in that case it doesn't change the rtl code,
2281 it only computes whether control can drop off the end of the function. */
2283 if (optimize > 0 || extra_warnings || warn_return_type
2284 /* If function is `volatile', we should warn if it tries to return. */
2285 || TREE_THIS_VOLATILE (decl))
2287 TIMEVAR (jump_time, reg_scan (insns, max_reg_num (), 0));
2288 TIMEVAR (jump_time, jump_optimize (insns, 0, 0, 1));
2291 /* Now is when we stop if -fsyntax-only and -Wreturn-type. */
2292 if (rtl_dump_and_exit || flag_syntax_only)
2293 goto exit_rest_of_compilation;
2295 /* Dump rtl code after jump, if we are doing that. */
2300 fprintf (jump_opt_dump_file, "\n;; Function %s\n\n",
2301 IDENTIFIER_POINTER (DECL_NAME (decl)));
2302 print_rtl (jump_opt_dump_file, insns);
2303 fflush (jump_opt_dump_file);
2306 /* Perform common subexpression elimination.
2307 Nonzero value from `cse_main' means that jumps were simplified
2308 and some code may now be unreachable, so do
2309 jump optimization again. */
2314 fprintf (cse_dump_file, "\n;; Function %s\n\n",
2315 IDENTIFIER_POINTER (DECL_NAME (decl)));
2320 TIMEVAR (cse_time, reg_scan (insns, max_reg_num (), 1));
2322 if (flag_thread_jumps)
2323 /* Hacks by tiemann & kenner. */
2324 TIMEVAR (jump_time, thread_jumps (insns, max_reg_num (), 0));
2326 TIMEVAR (cse_time, tem = cse_main (insns, max_reg_num (),
2328 TIMEVAR (cse_time, delete_dead_from_cse (insns, max_reg_num ()));
2331 TIMEVAR (jump_time, jump_optimize (insns, 0, 0, 0));
2334 /* Dump rtl code after cse, if we are doing that. */
2339 print_rtl (cse_dump_file, insns);
2340 fflush (cse_dump_file);
2346 fprintf (loop_dump_file, "\n;; Function %s\n\n",
2347 IDENTIFIER_POINTER (DECL_NAME (decl)));
2350 /* Move constant computations out of loops. */
2356 loop_optimize (insns, loop_dump_file);
2360 /* Dump rtl code after loop opt, if we are doing that. */
2365 print_rtl (loop_dump_file, insns);
2366 fflush (loop_dump_file);
2372 fprintf (cse2_dump_file, "\n;; Function %s\n\n",
2373 IDENTIFIER_POINTER (DECL_NAME (decl)));
2376 if (optimize > 0 && flag_rerun_cse_after_loop)
2378 TIMEVAR (cse2_time, reg_scan (insns, max_reg_num (), 0));
2380 TIMEVAR (cse2_time, tem = cse_main (insns, max_reg_num (),
2381 1, cse2_dump_file));
2383 TIMEVAR (jump_time, jump_optimize (insns, 0, 0, 0));
2386 if (optimize > 0 && flag_thread_jumps)
2387 /* This pass of jump threading straightens out code
2388 that was kinked by loop optimization. */
2389 TIMEVAR (jump_time, thread_jumps (insns, max_reg_num (), 0));
2391 /* Dump rtl code after cse, if we are doing that. */
2396 print_rtl (cse2_dump_file, insns);
2397 fflush (cse2_dump_file);
2400 /* We are no longer anticipating cse in this function, at least. */
2402 cse_not_expected = 1;
2404 /* Now we choose between stupid (pcc-like) register allocation
2405 (if we got the -noreg switch and not -opt)
2406 and smart register allocation. */
2408 if (optimize > 0) /* Stupid allocation probably won't work */
2409 obey_regdecls = 0; /* if optimizations being done. */
2413 /* Print function header into flow dump now
2414 because doing the flow analysis makes some of the dump. */
2419 fprintf (flow_dump_file, "\n;; Function %s\n\n",
2420 IDENTIFIER_POINTER (DECL_NAME (decl)));
2427 regclass (insns, max_reg_num ());
2428 stupid_life_analysis (insns, max_reg_num (),
2434 /* Do control and data flow analysis,
2435 and write some of the results to dump file. */
2437 TIMEVAR (flow_time, flow_analysis (insns, max_reg_num (),
2439 if (warn_uninitialized)
2441 uninitialized_vars_warning (DECL_INITIAL (decl));
2442 setjmp_args_warning ();
2446 /* Dump rtl after flow analysis. */
2451 print_rtl (flow_dump_file, insns);
2452 fflush (flow_dump_file);
2455 /* If -opt, try combining insns through substitution. */
2458 TIMEVAR (combine_time, combine_instructions (insns, max_reg_num ()));
2460 /* Dump rtl code after insn combination. */
2465 fprintf (combine_dump_file, "\n;; Function %s\n\n",
2466 IDENTIFIER_POINTER (DECL_NAME (decl)));
2467 dump_combine_stats (combine_dump_file);
2468 print_rtl (combine_dump_file, insns);
2469 fflush (combine_dump_file);
2472 /* Print function header into sched dump now
2473 because doing the sched analysis makes some of the dump. */
2478 fprintf (sched_dump_file, "\n;; Function %s\n\n",
2479 IDENTIFIER_POINTER (DECL_NAME (decl)));
2482 if (optimize > 0 && flag_schedule_insns)
2484 /* Do control and data sched analysis,
2485 and write some of the results to dump file. */
2487 TIMEVAR (sched_time, schedule_insns (sched_dump_file));
2490 /* Dump rtl after instruction scheduling. */
2495 print_rtl (sched_dump_file, insns);
2496 fflush (sched_dump_file);
2499 /* Unless we did stupid register allocation,
2500 allocate pseudo-regs that are used only within 1 basic block. */
2503 TIMEVAR (local_alloc_time,
2505 regclass (insns, max_reg_num ());
2509 /* Dump rtl code after allocating regs within basic blocks. */
2514 fprintf (local_reg_dump_file, "\n;; Function %s\n\n",
2515 IDENTIFIER_POINTER (DECL_NAME (decl)));
2516 dump_flow_info (local_reg_dump_file);
2517 dump_local_alloc (local_reg_dump_file);
2518 print_rtl (local_reg_dump_file, insns);
2519 fflush (local_reg_dump_file);
2522 if (global_reg_dump)
2524 fprintf (global_reg_dump_file, "\n;; Function %s\n\n",
2525 IDENTIFIER_POINTER (DECL_NAME (decl))));
2527 /* Unless we did stupid register allocation,
2528 allocate remaining pseudo-regs, then do the reload pass
2529 fixing up any insns that are invalid. */
2531 TIMEVAR (global_alloc_time,
2534 failure = global_alloc (global_reg_dump_file);
2536 failure = reload (insns, 0, global_reg_dump_file);
2539 if (global_reg_dump)
2542 dump_global_regs (global_reg_dump_file);
2543 print_rtl (global_reg_dump_file, insns);
2544 fflush (global_reg_dump_file);
2548 goto exit_rest_of_compilation;
2550 reload_completed = 1;
2552 /* On some machines, the prologue and epilogue code, or parts thereof,
2553 can be represented as RTL. Doing so lets us schedule insns between
2554 it and the rest of the code and also allows delayed branch
2555 scheduling to operate in the epilogue. */
2557 thread_prologue_and_epilogue_insns (insns);
2559 if (optimize > 0 && flag_schedule_insns_after_reload)
2564 fprintf (sched2_dump_file, "\n;; Function %s\n\n",
2565 IDENTIFIER_POINTER (DECL_NAME (decl)));
2568 /* Do control and data sched analysis again,
2569 and write some more of the results to dump file. */
2571 TIMEVAR (sched2_time, schedule_insns (sched2_dump_file));
2573 /* Dump rtl after post-reorder instruction scheduling. */
2578 print_rtl (sched2_dump_file, insns);
2579 fflush (sched2_dump_file);
2583 #ifdef LEAF_REGISTERS
2585 if (optimize > 0 && only_leaf_regs_used () && leaf_function_p ())
2589 /* One more attempt to remove jumps to .+1
2590 left by dead-store-elimination.
2591 Also do cross-jumping this time
2592 and delete no-op move insns. */
2596 TIMEVAR (jump_time, jump_optimize (insns, 1, 1, 0));
2599 /* Dump rtl code after jump, if we are doing that. */
2604 fprintf (jump2_opt_dump_file, "\n;; Function %s\n\n",
2605 IDENTIFIER_POINTER (DECL_NAME (decl)));
2606 print_rtl (jump2_opt_dump_file, insns);
2607 fflush (jump2_opt_dump_file);
2610 /* If a scheduling pass for delayed branches is to be done,
2611 call the scheduling code. */
2614 if (optimize > 0 && flag_delayed_branch)
2616 TIMEVAR (dbr_sched_time, dbr_schedule (insns, dbr_sched_dump_file));
2621 fprintf (dbr_sched_dump_file, "\n;; Function %s\n\n",
2622 IDENTIFIER_POINTER (DECL_NAME (decl)));
2623 print_rtl (dbr_sched_dump_file, insns);
2624 fflush (dbr_sched_dump_file);
2631 /* Shorten branches. */
2632 TIMEVAR (shorten_branch_time,
2634 shorten_branches (get_insns ());
2638 TIMEVAR (stack_reg_time, reg_to_stack (insns, stack_reg_dump_file));
2643 fprintf (stack_reg_dump_file, "\n;; Function %s\n\n",
2644 IDENTIFIER_POINTER (DECL_NAME (decl)));
2645 print_rtl (stack_reg_dump_file, insns);
2646 fflush (stack_reg_dump_file);
2651 /* Now turn the rtl into assembler code. */
2653 TIMEVAR (final_time,
2658 /* Get the function's name, as described by its RTL.
2659 This may be different from the DECL_NAME name used
2660 in the source file. */
2662 x = DECL_RTL (decl);
2663 if (GET_CODE (x) != MEM)
2666 if (GET_CODE (x) != SYMBOL_REF)
2668 fnname = XSTR (x, 0);
2670 assemble_start_function (decl, fnname);
2671 final_start_function (insns, asm_out_file, optimize);
2672 final (insns, asm_out_file, optimize, 0);
2673 final_end_function (insns, asm_out_file, optimize);
2674 assemble_end_function (decl, fnname);
2675 fflush (asm_out_file);
2678 /* Write DBX symbols if requested */
2680 /* Note that for those inline functions where we don't initially
2681 know for certain that we will be generating an out-of-line copy,
2682 the first invocation of this routine (rest_of_compilation) will
2683 skip over this code by doing a `goto exit_rest_of_compilation;'.
2684 Later on, finish_compilation will call rest_of_compilation again
2685 for those inline functions that need to have out-of-line copies
2686 generated. During that call, we *will* be routed past here. */
2688 #ifdef DBX_DEBUGGING_INFO
2689 if (write_symbols == DBX_DEBUG)
2690 TIMEVAR (symout_time, dbxout_function (decl));
2693 #ifdef DWARF_DEBUGGING_INFO
2694 if (write_symbols == DWARF_DEBUG)
2695 TIMEVAR (symout_time, dwarfout_file_scope_decl (decl, 0));
2698 exit_rest_of_compilation:
2700 /* In case the function was not output,
2701 don't leave any temporary anonymous types
2702 queued up for sdb output. */
2703 #ifdef SDB_DEBUGGING_INFO
2704 if (write_symbols == SDB_DEBUG)
2705 sdbout_types (NULL_TREE);
2708 /* Put back the tree of subblocks and list of arguments
2709 from before we copied them.
2710 Code generation and the output of debugging info may have modified
2711 the copy, but the original is unchanged. */
2713 if (saved_block_tree != 0)
2714 DECL_INITIAL (decl) = saved_block_tree;
2715 if (saved_arguments != 0)
2716 DECL_ARGUMENTS (decl) = saved_arguments;
2718 reload_completed = 0;
2720 /* Clear out the real_constant_chain before some of the rtx's
2721 it runs through become garbage. */
2723 clear_const_double_mem ();
2725 /* Cancel the effect of rtl_in_current_obstack. */
2727 resume_temporary_allocation ();
2729 /* The parsing time is all the time spent in yyparse
2730 *except* what is spent in this function. */
2732 parse_time -= get_run_time () - start_time;
2735 /* Entry point of cc1/c++. Decode command args, then call compile_file.
2736 Exit code is 35 if can't open files, 34 if fatal error,
2737 33 if had nonfatal errors, else success. */
2740 main (argc, argv, envp)
2747 int flag_print_mem = 0;
2748 int version_flag = 0;
2751 /* save in case md file wants to emit args as a comment. */
2755 p = argv[0] + strlen (argv[0]);
2756 while (p != argv[0] && p[-1] != '/') --p;
2760 /* Get rid of any avoidable limit on stack size. */
2764 /* Set the stack limit huge so that alloca does not fail. */
2765 getrlimit (RLIMIT_STACK, &rlim);
2766 rlim.rlim_cur = rlim.rlim_max;
2767 setrlimit (RLIMIT_STACK, &rlim);
2769 #endif /* RLIMIT_STACK */
2771 signal (SIGFPE, float_signal);
2773 signal (SIGPIPE, pipe_closed);
2775 decl_printable_name = decl_name;
2776 lang_expand_expr = (struct rtx_def *(*)()) do_abort;
2778 /* Initialize whether `char' is signed. */
2779 flag_signed_char = DEFAULT_SIGNED_CHAR;
2780 #ifdef DEFAULT_SHORT_ENUMS
2781 /* Initialize how much space enums occupy, by default. */
2782 flag_short_enums = DEFAULT_SHORT_ENUMS;
2785 /* Scan to see what optimization level has been specified. That will
2786 determine the default value of many flags. */
2787 for (i = 1; i < argc; i++)
2789 if (!strcmp (argv[i], "-O"))
2793 else if (argv[i][0] == '-' && argv[i][1] == 'O')
2795 /* Handle -O2, -O3, -O69, ... */
2796 char *p = &argv[i][2];
2800 if (! (c >= '0' && c <= '9'))
2803 optimize = atoi (&argv[i][2]);
2807 obey_regdecls = (optimize == 0);
2816 flag_thread_jumps = 1;
2818 flag_delayed_branch = 1;
2824 flag_cse_follow_jumps = 1;
2825 flag_cse_skip_blocks = 1;
2826 flag_expensive_optimizations = 1;
2827 flag_strength_reduce = 1;
2828 flag_rerun_cse_after_loop = 1;
2829 flag_caller_saves = 1;
2830 #ifdef INSN_SCHEDULING
2831 flag_schedule_insns = 1;
2832 flag_schedule_insns_after_reload = 1;
2836 #ifdef OPTIMIZATION_OPTIONS
2837 /* Allow default optimizations to be specified on a per-machine basis. */
2838 OPTIMIZATION_OPTIONS (optimize);
2841 /* Initialize register usage now so switches may override. */
2845 set_target_switch ("");
2847 for (i = 1; i < argc; i++)
2850 /* If this is a language-specific option,
2851 decode it in a language-specific way. */
2852 for (j = 0; lang_options[j] != 0; j++)
2853 if (!strncmp (argv[i], lang_options[j],
2854 strlen (lang_options[j])))
2856 if (lang_options[j] != 0)
2857 /* If the option is valid for *some* language,
2858 treat it as valid even if this language doesn't understand it. */
2859 lang_decode_option (argv[i]);
2860 else if (argv[i][0] == '-' && argv[i][1] != 0)
2862 register char *str = argv[i] + 1;
2867 set_target_switch (&str[1]);
2868 else if (!strcmp (str, "dumpbase"))
2870 dump_base_name = argv[++i];
2872 else if (str[0] == 'd')
2874 register char *p = &str[1];
2882 global_reg_dump = 1;
2888 cse_dump = 1, cse2_dump = 1;
2906 global_reg_dump = 1;
2924 flag_print_asm_name = 1;
2946 rtl_dump_and_exit = 1;
2950 else if (str[0] == 'f')
2952 register char *p = &str[1];
2955 /* Some kind of -f option.
2956 P's value is the option sans `-f'.
2957 Search for it in the table of options. */
2960 !found && j < sizeof (f_options) / sizeof (f_options[0]);
2963 if (!strcmp (p, f_options[j].string))
2965 *f_options[j].variable = f_options[j].on_value;
2966 /* A goto here would be cleaner,
2967 but breaks the vax pcc. */
2970 if (p[0] == 'n' && p[1] == 'o' && p[2] == '-'
2971 && ! strcmp (p+3, f_options[j].string))
2973 *f_options[j].variable = ! f_options[j].on_value;
2980 else if (!strncmp (p, "fixed-", 6))
2981 fix_register (&p[6], 1, 1);
2982 else if (!strncmp (p, "call-used-", 10))
2983 fix_register (&p[10], 0, 1);
2984 else if (!strncmp (p, "call-saved-", 11))
2985 fix_register (&p[11], 0, 0);
2987 error ("Invalid option `%s'", argv[i]);
2989 else if (str[0] == 'O')
2991 register char *p = str+1;
2992 while (*p && *p >= '0' && *p <= '9')
2997 error ("Invalid option `%s'", argv[i]);
2999 else if (!strcmp (str, "pedantic"))
3001 else if (!strcmp (str, "pedantic-errors"))
3002 flag_pedantic_errors = pedantic = 1;
3003 else if (!strcmp (str, "quiet"))
3005 else if (!strcmp (str, "version"))
3007 else if (!strcmp (str, "w"))
3008 inhibit_warnings = 1;
3009 else if (!strcmp (str, "W"))
3012 warn_uninitialized = 1;
3014 else if (str[0] == 'W')
3016 register char *p = &str[1];
3019 /* Some kind of -W option.
3020 P's value is the option sans `-W'.
3021 Search for it in the table of options. */
3024 !found && j < sizeof (W_options) / sizeof (W_options[0]);
3027 if (!strcmp (p, W_options[j].string))
3029 *W_options[j].variable = W_options[j].on_value;
3030 /* A goto here would be cleaner,
3031 but breaks the vax pcc. */
3034 if (p[0] == 'n' && p[1] == 'o' && p[2] == '-'
3035 && ! strcmp (p+3, W_options[j].string))
3037 *W_options[j].variable = ! W_options[j].on_value;
3044 else if (!strncmp (p, "id-clash-", 9))
3050 if (*endp >= '0' && *endp <= '9')
3054 error ("Invalid option `%s'", argv[i]);
3059 id_clash_len = atoi (str + 10);
3063 error ("Invalid option `%s'", argv[i]);
3065 else if (!strcmp (str, "p"))
3067 else if (!strcmp (str, "a"))
3069 #if !defined (BLOCK_PROFILER) || !defined (FUNCTION_BLOCK_PROFILER)
3070 warning ("`-a' option (basic block profile) not supported");
3072 profile_block_flag = 1;
3075 else if (str[0] == 'g')
3082 while (*p && (*p < '0' || *p > '9'))
3086 while (*q && (*q >= '0' && *q <= '9'))
3091 level = 2; /* default debugging info level */
3092 if (*q || level > 3)
3094 warning ("invalid debug level specification in option: `-%s'",
3096 warning ("no debugging information will be generated");
3100 /* If more than one debugging type is supported,
3101 you must define PREFERRED_DEBUGGING_TYPE
3102 to choose a format in a system-dependent way. */
3103 /* This is one long line cause VAXC can't handle a \-newline. */
3104 #if 1 < (defined (DBX_DEBUGGING_INFO) + defined (SDB_DEBUGGING_INFO) + defined (DWARF_DEBUGGING_INFO) + defined (XCOFF_DEBUGGING_INFO))
3105 #ifdef PREFERRED_DEBUGGING_TYPE
3106 if (!strncmp (str, "ggdb", len))
3107 write_symbols = PREFERRED_DEBUGGING_TYPE;
3108 #else /* no PREFERRED_DEBUGGING_TYPE */
3109 You Lose! You must define PREFERRED_DEBUGGING_TYPE!
3110 #endif /* no PREFERRED_DEBUGGING_TYPE */
3111 #endif /* More than one debugger format enabled. */
3112 #ifdef DBX_DEBUGGING_INFO
3113 if (write_symbols != NO_DEBUG)
3115 else if (!strncmp (str, "ggdb", len))
3116 write_symbols = DBX_DEBUG;
3117 else if (!strncmp (str, "gstabs", len))
3118 write_symbols = DBX_DEBUG;
3119 else if (!strncmp (str, "gstabs+", len))
3120 write_symbols = DBX_DEBUG;
3122 /* Always enable extensions for -ggdb or -gstabs+,
3123 always disable for -gstabs.
3124 For plain -g, use system-specific default. */
3125 if (write_symbols == DBX_DEBUG && !strncmp (str, "ggdb", len)
3127 use_gnu_debug_info_extensions = 1;
3128 else if (write_symbols == DBX_DEBUG && !strncmp (str, "gstabs+", len)
3130 use_gnu_debug_info_extensions = 1;
3131 else if (write_symbols == DBX_DEBUG
3132 && !strncmp (str, "gstabs", len) && len >= 2)
3133 use_gnu_debug_info_extensions = 0;
3135 use_gnu_debug_info_extensions = DEFAULT_GDB_EXTENSIONS;
3136 #endif /* DBX_DEBUGGING_INFO */
3137 #ifdef DWARF_DEBUGGING_INFO
3138 if (write_symbols != NO_DEBUG)
3140 else if (!strncmp (str, "g", len))
3141 write_symbols = DWARF_DEBUG;
3142 else if (!strncmp (str, "ggdb", len))
3143 write_symbols = DWARF_DEBUG;
3144 else if (!strncmp (str, "gdwarf", len))
3145 write_symbols = DWARF_DEBUG;
3147 /* Always enable extensions for -ggdb or -gdwarf+,
3148 always disable for -gdwarf.
3149 For plain -g, use system-specific default. */
3150 if (write_symbols == DWARF_DEBUG && !strncmp (str, "ggdb", len)
3152 use_gnu_debug_info_extensions = 1;
3153 else if (write_symbols == DWARF_DEBUG && !strcmp (str, "gdwarf+"))
3154 use_gnu_debug_info_extensions = 1;
3155 else if (write_symbols == DWARF_DEBUG
3156 && !strncmp (str, "gdwarf", len) && len >= 2)
3157 use_gnu_debug_info_extensions = 0;
3159 use_gnu_debug_info_extensions = DEFAULT_GDB_EXTENSIONS;
3161 #ifdef SDB_DEBUGGING_INFO
3162 if (write_symbols != NO_DEBUG)
3164 else if (!strncmp (str, "g", len))
3165 write_symbols = SDB_DEBUG;
3166 else if (!strncmp (str, "gdb", len))
3167 write_symbols = SDB_DEBUG;
3168 else if (!strncmp (str, "gcoff", len))
3169 write_symbols = SDB_DEBUG;
3170 #endif /* SDB_DEBUGGING_INFO */
3171 #ifdef XCOFF_DEBUGGING_INFO
3172 if (write_symbols != NO_DEBUG)
3174 else if (!strncmp (str, "g", len))
3175 write_symbols = XCOFF_DEBUG;
3176 else if (!strncmp (str, "ggdb", len))
3177 write_symbols = XCOFF_DEBUG;
3178 else if (!strncmp (str, "gxcoff", len))
3179 write_symbols = XCOFF_DEBUG;
3181 /* Always enable extensions for -ggdb or -gxcoff+,
3182 always disable for -gxcoff.
3183 For plain -g, use system-specific default. */
3184 if (write_symbols == XCOFF_DEBUG && !strncmp (str, "ggdb", len)
3186 use_gnu_debug_info_extensions = 1;
3187 else if (write_symbols == XCOFF_DEBUG && !strcmp (str, "gxcoff+"))
3188 use_gnu_debug_info_extensions = 1;
3189 else if (write_symbols == XCOFF_DEBUG
3190 && !strncmp (str, "gxcoff", len) && len >= 2)
3191 use_gnu_debug_info_extensions = 0;
3193 use_gnu_debug_info_extensions = DEFAULT_GDB_EXTENSIONS;
3195 if (write_symbols == NO_DEBUG)
3196 warning ("`-%s' option not supported on this version of GCC", str);
3197 else if (level == 0)
3198 write_symbols = NO_DEBUG;
3200 debug_info_level = (enum debug_info_level) level;
3202 else if (!strcmp (str, "o"))
3204 asm_file_name = argv[++i];
3206 else if (str[0] == 'G')
3208 g_switch_set = TRUE;
3209 g_switch_value = atoi ((str[1] != '\0') ? str+1 : argv[++i]);
3211 else if (!strncmp (str, "aux-info", 8))
3213 flag_gen_aux_info = 1;
3214 aux_info_file_name = (str[8] != '\0' ? str+8 : argv[++i]);
3217 error ("Invalid option `%s'", argv[i]);
3219 else if (argv[i][0] == '+')
3220 error ("Invalid option `%s'", argv[i]);
3227 /* Inlining does not work if not optimizing,
3228 so force it not to be done. */
3232 /* The c_decode_option and lang_decode_option functions set
3233 this to `2' if -Wall is used, so we can avoid giving out
3234 lots of errors for people who don't realize what -Wall does. */
3235 if (warn_uninitialized == 1)
3236 warning ("-Wuninitialized is not supported without -O");
3239 #ifdef OVERRIDE_OPTIONS
3240 /* Some machines may reject certain combinations of options. */
3244 /* Unrolling all loops implies that standard loop unrolling must also
3246 if (flag_unroll_all_loops)
3247 flag_unroll_loops = 1;
3248 /* Loop unrolling requires that strength_reduction be on also. Silently
3249 turn on strength reduction here if it isn't already on. Also, the loop
3250 unrolling code assumes that cse will be run after loop, so that must
3251 be turned on also. */
3252 if (flag_unroll_loops)
3254 flag_strength_reduce = 1;
3255 flag_rerun_cse_after_loop = 1;
3258 /* Warn about options that are not supported on this machine. */
3259 #ifndef INSN_SCHEDULING
3260 if (flag_schedule_insns || flag_schedule_insns_after_reload)
3261 warning ("instruction scheduling not supported on this target machine");
3264 if (flag_delayed_branch)
3265 warning ("this target machine does not have delayed branches");
3268 /* If we are in verbose mode, write out the version and maybe all the
3269 option flags in use. */
3272 fprintf (stderr, "%s version %s", language_string, version_string);
3273 #ifdef TARGET_VERSION
3278 #define __VERSION__ "[unknown]"
3280 fprintf (stderr, " compiled by GNU C version %s.\n", __VERSION__);
3282 fprintf (stderr, " compiled by CC.\n");
3285 print_switch_values ();
3288 /* Now that register usage is specified, convert it to HARD_REG_SETs. */
3291 compile_file (filename);
3297 char *lim = (char *) sbrk (0);
3299 fprintf (stderr, "Data size %d.\n",
3300 lim - (char *) &environ);
3304 system ("ps -l 1>&2");
3307 #endif /* not USG */
3309 #endif /* not VMS */
3310 #endif /* not OS2 */
3313 exit (FATAL_EXIT_CODE);
3315 exit (FATAL_EXIT_CODE);
3316 exit (SUCCESS_EXIT_CODE);
3320 /* Decode -m switches. */
3322 /* Here is a table, controlled by the tm.h file, listing each -m switch
3323 and which bits in `target_switches' it should set or clear.
3324 If VALUE is positive, it is bits to set.
3325 If VALUE is negative, -VALUE is bits to clear.
3326 (The sign bit is not used so there is no confusion.) */
3328 struct {char *name; int value;} target_switches []
3331 /* This table is similar, but allows the switch to have a value. */
3333 #ifdef TARGET_OPTIONS
3334 struct {char *prefix; char ** variable;} target_options []
3338 /* Decode the switch -mNAME. */
3341 set_target_switch (name)
3347 for (j = 0; j < sizeof target_switches / sizeof target_switches[0]; j++)
3348 if (!strcmp (target_switches[j].name, name))
3350 if (target_switches[j].value < 0)
3351 target_flags &= ~-target_switches[j].value;
3353 target_flags |= target_switches[j].value;
3357 #ifdef TARGET_OPTIONS
3359 for (j = 0; j < sizeof target_options / sizeof target_options[0]; j++)
3361 int len = strlen (target_options[j].prefix);
3362 if (!strncmp (target_options[j].prefix, name, len))
3364 *target_options[j].variable = name + len;
3371 error ("Invalid option `%s'", name);
3374 /* Variable used for communication between the following two routines. */
3376 static int line_position;
3378 /* Print an option value and adjust the position in the line. */
3381 print_single_switch (type, name)
3384 fprintf (stderr, " %s%s", type, name);
3386 line_position += strlen (type) + strlen (name) + 1;
3388 if (line_position > 65)
3390 fprintf (stderr, "\n\t");
3395 /* Print default target switches for -version. */
3398 print_switch_values ()
3402 fprintf (stderr, "enabled:");
3405 for (j = 0; j < sizeof f_options / sizeof f_options[0]; j++)
3406 if (*f_options[j].variable == f_options[j].on_value)
3407 print_single_switch ("-f", f_options[j].string);
3409 for (j = 0; j < sizeof W_options / sizeof W_options[0]; j++)
3410 if (*W_options[j].variable == W_options[j].on_value)
3411 print_single_switch ("-W", W_options[j].string);
3413 for (j = 0; j < sizeof target_switches / sizeof target_switches[0]; j++)
3414 if (target_switches[j].name[0] != '\0'
3415 && target_switches[j].value > 0
3416 && ((target_switches[j].value & target_flags)
3417 == target_switches[j].value))
3418 print_single_switch ("-m", target_switches[j].name);
3420 fprintf (stderr, "\n");