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"
57 #ifdef XCOFF_DEBUGGING_INFO
62 /* The extra parameters substantially improve the I/O performance. */
64 VMS_fopen (fname, type)
68 if (strcmp (type, "w") == 0)
69 return fopen (fname, type, "mbc=16", "deq=64", "fop=tef", "shr=nil");
70 return fopen (fname, type, "mbc=16");
72 #define fopen VMS_fopen
75 #ifndef DEFAULT_GDB_EXTENSIONS
76 #define DEFAULT_GDB_EXTENSIONS 1
79 extern int rtx_equal_function_value_matters;
81 #if ! (defined (VMS) || defined (OS2))
82 extern char **environ;
84 extern char *version_string, *language_string;
86 extern void init_lex ();
87 extern void init_decl_processing ();
88 extern void init_obstacks ();
89 extern void init_tree_codes ();
90 extern void init_rtl ();
91 extern void init_optabs ();
92 extern void init_stmt ();
93 extern void init_reg_sets ();
94 extern void dump_flow_info ();
95 extern void dump_sched_info ();
96 extern void dump_local_alloc ();
98 void rest_of_decl_compilation ();
100 void error_with_file_and_line ();
105 void set_target_switch ();
106 static void print_switch_values ();
107 static char *decl_name ();
109 /* Name of program invoked, sans directories. */
113 /* Copy of arguments to main. */
117 /* Name of current original source file (what was input to cpp).
118 This comes from each #-command in the actual input. */
120 char *input_filename;
122 /* Name of top-level original source file (what was input to cpp).
123 This comes from the #-command at the beginning of the actual input.
124 If there isn't any there, then this is the cc1 input file name. */
126 char *main_input_filename;
128 /* Stream for reading from the input file. */
132 /* Current line number in real source file. */
136 /* Stack of currently pending input files. */
138 struct file_stack *input_file_stack;
140 /* Incremented on each change to input_file_stack. */
141 int input_file_stack_tick;
143 /* FUNCTION_DECL for function now being parsed or compiled. */
145 extern tree current_function_decl;
147 /* Name to use as base of names for dump output files. */
149 char *dump_base_name;
151 /* Bit flags that specify the machine subtype we are compiling for.
152 Bits are tested using macros TARGET_... defined in the tm.h file
153 and set by `-m...' switches. Must be defined in rtlanal.c. */
155 extern int target_flags;
157 /* Flags saying which kinds of debugging dump have been requested. */
160 int rtl_dump_and_exit = 0;
161 int jump_opt_dump = 0;
166 int combine_dump = 0;
168 int local_reg_dump = 0;
169 int global_reg_dump = 0;
171 int jump2_opt_dump = 0;
172 int dbr_sched_dump = 0;
173 int flag_print_asm_name = 0;
174 int stack_reg_dump = 0;
176 /* Name for output file of assembly code, specified with -o. */
180 /* Value of the -G xx switch, and whether it was passed or not. */
184 /* Type(s) of debugging information we are producing (if any).
185 See flags.h for the definitions of the different possible
186 types of debugging information. */
187 enum debug_info_type write_symbols = NO_DEBUG;
189 /* Level of debugging information we are producing. See flags.h
190 for the definitions of the different possible levels. */
191 enum debug_info_level debug_info_level = DINFO_LEVEL_NONE;
193 /* Nonzero means use GNU-only extensions in the generated symbolic
194 debugging information. */
195 /* Currently, this only has an effect when write_symbols is set to
196 DBX_DEBUG, XCOFF_DEBUG, or DWARF_DEBUG. */
197 int use_gnu_debug_info_extensions = 0;
199 /* Nonzero means do optimizations. -O.
200 Particular numeric values stand for particular amounts of optimization;
201 thus, -O2 stores 2 here. However, the optimizations beyond the basic
202 ones are not controlled directly by this variable. Instead, they are
203 controlled by individual `flag_...' variables that are defaulted
204 based on this variable. */
208 /* Number of error messages and warning messages so far. */
211 int warningcount = 0;
214 /* Pointer to function to compute the name to use to print a declaration. */
216 char *(*decl_printable_name) ();
218 /* Pointer to function to compute rtl for a language-specific tree code. */
220 struct rtx_def *(*lang_expand_expr) ();
222 /* Pointer to function to finish handling an incomplete decl at the
223 end of compilation. */
225 void (*incomplete_decl_finalize_hook) () = 0;
227 /* Nonzero if generating code to do profiling. */
229 int profile_flag = 0;
231 /* Nonzero if generating code to do profiling on a line-by-line basis. */
233 int profile_block_flag;
235 /* Nonzero for -pedantic switch: warn about anything
236 that standard spec forbids. */
240 /* Temporarily suppress certain warnings.
241 This is set while reading code from a system header file. */
243 int in_system_header = 0;
245 /* Nonzero means do stupid register allocation.
246 Currently, this is 1 if `optimize' is 0. */
248 int obey_regdecls = 0;
250 /* Don't print functions as they are compiled and don't print
251 times taken by the various passes. -quiet. */
257 /* Nonzero means `char' should be signed. */
259 int flag_signed_char;
261 /* Nonzero means give an enum type only as many bytes as it needs. */
263 int flag_short_enums;
265 /* Nonzero for -fcaller-saves: allocate values in regs that need to
266 be saved across function calls, if that produces overall better code.
267 Optional now, so people can test it. */
269 #ifdef DEFAULT_CALLER_SAVES
270 int flag_caller_saves = 1;
272 int flag_caller_saves = 0;
275 /* Nonzero if structures and unions should be returned in memory.
277 This should only be defined if compatibility with another compiler or
278 with an ABI is needed, because it results in slower code. */
280 #ifndef DEFAULT_PCC_STRUCT_RETURN
281 #define DEFAULT_PCC_STRUCT_RETURN 1
284 /* Nonzero for -fpcc-struct-return: return values the same way PCC does. */
286 int flag_pcc_struct_return = DEFAULT_PCC_STRUCT_RETURN;
288 /* Nonzero for -fforce-mem: load memory value into a register
289 before arithmetic on it. This makes better cse but slower compilation. */
291 int flag_force_mem = 0;
293 /* Nonzero for -fforce-addr: load memory address into a register before
294 reference to memory. This makes better cse but slower compilation. */
296 int flag_force_addr = 0;
298 /* Nonzero for -fdefer-pop: don't pop args after each function call;
299 instead save them up to pop many calls' args with one insns. */
301 int flag_defer_pop = 0;
303 /* Nonzero for -ffloat-store: don't allocate floats and doubles
304 in extended-precision registers. */
306 int flag_float_store = 0;
308 /* Nonzero for -fcse-follow-jumps:
309 have cse follow jumps to do a more extensive job. */
311 int flag_cse_follow_jumps;
313 /* Nonzero for -fcse-skip-blocks:
314 have cse follow a branch around a block. */
315 int flag_cse_skip_blocks;
317 /* Nonzero for -fexpensive-optimizations:
318 perform miscellaneous relatively-expensive optimizations. */
319 int flag_expensive_optimizations;
321 /* Nonzero for -fthread-jumps:
322 have jump optimize output of loop. */
324 int flag_thread_jumps;
326 /* Nonzero enables strength-reduction in loop.c. */
328 int flag_strength_reduce = 0;
330 /* Nonzero enables loop unrolling in unroll.c. Only loops for which the
331 number of iterations can be calculated at compile-time (UNROLL_COMPLETELY,
332 UNROLL_MODULO) or at run-time (preconditioned to be UNROLL_MODULO) are
335 int flag_unroll_loops;
337 /* Nonzero enables loop unrolling in unroll.c. All loops are unrolled.
338 This is generally not a win. */
340 int flag_unroll_all_loops;
342 /* Nonzero for -fwritable-strings:
343 store string constants in data segment and don't uniquize them. */
345 int flag_writable_strings = 0;
347 /* Nonzero means don't put addresses of constant functions in registers.
348 Used for compiling the Unix kernel, where strange substitutions are
349 done on the assembly output. */
351 int flag_no_function_cse = 0;
353 /* Nonzero for -fomit-frame-pointer:
354 don't make a frame pointer in simple functions that don't require one. */
356 int flag_omit_frame_pointer = 0;
358 /* Nonzero to inhibit use of define_optimization peephole opts. */
360 int flag_no_peephole = 0;
362 /* Nonzero allows GCC to violate some IEEE or ANSI rules regarding math
363 operations in the interest of optimization. For example it allows
364 GCC to assume arguments to sqrt are nonnegative numbers, allowing
365 faster code for sqrt to be generated. */
367 int flag_fast_math = 0;
369 /* Nonzero means all references through pointers are volatile. */
373 /* Nonzero means treat all global and extern variables as global. */
375 int flag_volatile_global;
377 /* Nonzero means just do syntax checking; don't output anything. */
379 int flag_syntax_only = 0;
381 /* Nonzero means to rerun cse after loop optimization. This increases
382 compilation time about 20% and picks up a few more common expressions. */
384 static int flag_rerun_cse_after_loop;
386 /* Nonzero for -finline-functions: ok to inline functions that look like
387 good inline candidates. */
389 int flag_inline_functions;
391 /* Nonzero for -fkeep-inline-functions: even if we make a function
392 go inline everywhere, keep its definition around for debugging
395 int flag_keep_inline_functions;
397 /* Nonzero means that functions declared `inline' will be treated
398 as `static'. Prevents generation of zillions of copies of unused
399 static inline functions; instead, `inlines' are written out
400 only when actually used. Used in conjunction with -g. Also
401 does the right thing with #pragma interface. */
405 /* Nonzero means we should be saving declaration info into a .X file. */
407 int flag_gen_aux_info = 0;
409 /* Specified name of aux-info file. */
411 static char *aux_info_file_name;
413 /* Nonzero means make the text shared if supported. */
415 int flag_shared_data;
417 /* Nonzero means schedule into delayed branch slots if supported. */
419 int flag_delayed_branch;
421 /* Nonzero if we are compiling pure (sharable) code.
422 Value is 1 if we are doing reasonable (i.e. simple
423 offset into offset table) pic. Value is 2 if we can
424 only perform register offsets. */
428 /* Nonzero means place uninitialized global data in the bss section. */
432 /* Nonzero means pretend it is OK to examine bits of target floats,
433 even if that isn't true. The resulting code will have incorrect constants,
434 but the same series of instructions that the native compiler would make. */
436 int flag_pretend_float;
438 /* Nonzero means change certain warnings into errors.
439 Usually these are warnings about failure to conform to some standard. */
441 int flag_pedantic_errors = 0;
443 /* flag_schedule_insns means schedule insns within basic blocks (before
445 flag_schedule_insns_after_reload means schedule insns after
448 int flag_schedule_insns = 0;
449 int flag_schedule_insns_after_reload = 0;
451 /* -finhibit-size-directive inhibits output of .size for ELF.
452 This is used only for compiling crtstuff.c,
453 and it may be extended to other effects
454 needed for crtstuff.c on other systems. */
455 int flag_inhibit_size_directive = 0;
457 /* -fverbose-asm causes extra commentary information to be produced in
458 the generated assembly code (to make it more readable). This option
459 is generally only of use to those who actually need to read the
460 generated assembly code (perhaps while debugging the compiler itself). */
462 int flag_verbose_asm = 0;
464 /* -fgnu-linker specifies use of the GNU linker for initializations.
465 (Or, more generally, a linker that handles initializations.)
466 -fno-gnu-linker says that collect2 will be used. */
468 int flag_gnu_linker = 0;
470 int flag_gnu_linker = 1;
473 /* Table of language-independent -f options.
474 STRING is the option name. VARIABLE is the address of the variable.
475 ON_VALUE is the value to store in VARIABLE
476 if `-fSTRING' is seen as an option.
477 (If `-fno-STRING' is seen as an option, the opposite value is stored.) */
479 struct { char *string; int *variable; int on_value;} f_options[] =
481 {"float-store", &flag_float_store, 1},
482 {"volatile", &flag_volatile, 1},
483 {"volatile-global", &flag_volatile_global, 1},
484 {"defer-pop", &flag_defer_pop, 1},
485 {"omit-frame-pointer", &flag_omit_frame_pointer, 1},
486 {"cse-follow-jumps", &flag_cse_follow_jumps, 1},
487 {"cse-skip-blocks", &flag_cse_skip_blocks, 1},
488 {"expensive-optimizations", &flag_expensive_optimizations, 1},
489 {"thread-jumps", &flag_thread_jumps, 1},
490 {"strength-reduce", &flag_strength_reduce, 1},
491 {"unroll-loops", &flag_unroll_loops, 1},
492 {"unroll-all-loops", &flag_unroll_all_loops, 1},
493 {"writable-strings", &flag_writable_strings, 1},
494 {"peephole", &flag_no_peephole, 0},
495 {"force-mem", &flag_force_mem, 1},
496 {"force-addr", &flag_force_addr, 1},
497 {"function-cse", &flag_no_function_cse, 0},
498 {"inline-functions", &flag_inline_functions, 1},
499 {"keep-inline-functions", &flag_keep_inline_functions, 1},
500 {"inline", &flag_no_inline, 0},
501 {"syntax-only", &flag_syntax_only, 1},
502 {"shared-data", &flag_shared_data, 1},
503 {"caller-saves", &flag_caller_saves, 1},
504 {"pcc-struct-return", &flag_pcc_struct_return, 1},
505 {"reg-struct-return", &flag_pcc_struct_return, 0},
506 {"delayed-branch", &flag_delayed_branch, 1},
507 {"rerun-cse-after-loop", &flag_rerun_cse_after_loop, 1},
508 {"pretend-float", &flag_pretend_float, 1},
509 {"schedule-insns", &flag_schedule_insns, 1},
510 {"schedule-insns2", &flag_schedule_insns_after_reload, 1},
511 {"pic", &flag_pic, 1},
512 {"PIC", &flag_pic, 2},
513 {"fast-math", &flag_fast_math, 1},
514 {"common", &flag_no_common, 0},
515 {"inhibit-size-directive", &flag_inhibit_size_directive, 1},
516 {"verbose-asm", &flag_verbose_asm, 1},
517 {"gnu-linker", &flag_gnu_linker, 1}
520 /* Table of language-specific options. */
522 char *lang_options[] =
531 "-fno-unsigned-char",
532 "-fsigned-bitfields",
533 "-funsigned-bitfields",
534 "-fno-signed-bitfields",
535 "-fno-unsigned-bitfields",
539 "-fno-cond-mismatch",
552 "-Wno-write-strings",
556 "-Wno-pointer-arith",
557 "-Wstrict-prototypes",
558 "-Wno-strict-prototypes",
559 "-Wmissing-prototypes",
560 "-Wno-missing-prototypes",
562 "-Wno-redundant-decls",
564 "-Wno-nested-externs",
570 "-Wno-char-subscripts",
584 "-Wno-missing-braces",
587 /* These are for C++. */
588 "-+e0", /* gcc.c tacks the `-' on the front. */
592 "-fno-save-memoized",
601 "-fthis-is-variable",
602 "-fno-this-is-variable",
603 "-fstrict-prototype",
604 "-fno-strict-prototype",
608 "-fno-memoize-lookups",
609 "-felide-constructors",
610 "-fno-elide-constructors",
613 "-fhandle-exceptions",
614 "-fno-handle-exceptions",
616 "-fno-ansi-exceptions",
617 "-fspring-exceptions",
618 "-fno-spring-exceptions",
620 "-fno-default-inline",
622 "-fno-enum-int-equiv",
628 "-fno-nonnull-objects",
629 "-fimplement-inlines",
630 "-fno-implement-inlines",
634 "-Woverloaded-virtual",
635 "-Wno-overloaded-virtual",
638 "-Wtemplate-debugging",
639 "-Wno-template-debugging",
641 /* these are for obj c */
655 /* Options controlling warnings */
657 /* Don't print warning messages. -w. */
659 int inhibit_warnings = 0;
661 /* Print various extra warnings. -W. */
663 int extra_warnings = 0;
665 /* Treat warnings as errors. -Werror. */
667 int warnings_are_errors = 0;
669 /* Nonzero to warn about unused local variables. */
673 /* Nonzero to warn about variables used before they are initialized. */
675 int warn_uninitialized;
677 /* Nonzero means warn about all declarations which shadow others. */
681 /* Warn if a switch on an enum fails to have a case for every enum value. */
685 /* Nonzero means warn about function definitions that default the return type
686 or that use a null return and have a return-type other than void. */
688 int warn_return_type;
690 /* Nonzero means warn about pointer casts that increase the required
691 alignment of the target type (and might therefore lead to a crash
692 due to a misaligned access). */
696 /* Nonzero means warn about any identifiers that match in the first N
697 characters. The value N is in `id_clash_len'. */
702 /* Nonzero means warn if inline function is too large. */
706 /* Warn if a function returns an aggregate,
707 since there are often incompatible calling conventions for doing this. */
709 int warn_aggregate_return;
711 /* Likewise for -W. */
713 struct { char *string; int *variable; int on_value;} W_options[] =
715 {"unused", &warn_unused, 1},
716 {"error", &warnings_are_errors, 1},
717 {"shadow", &warn_shadow, 1},
718 {"switch", &warn_switch, 1},
719 {"aggregate-return", &warn_aggregate_return, 1},
720 {"cast-align", &warn_cast_align, 1},
721 {"uninitialized", &warn_uninitialized, 1},
722 {"inline", &warn_inline, 1}
725 /* Output files for assembler code (real compiler output)
726 and debugging dumps. */
731 FILE *jump_opt_dump_file;
733 FILE *loop_dump_file;
734 FILE *cse2_dump_file;
735 FILE *flow_dump_file;
736 FILE *combine_dump_file;
737 FILE *sched_dump_file;
738 FILE *local_reg_dump_file;
739 FILE *global_reg_dump_file;
740 FILE *sched2_dump_file;
741 FILE *jump2_opt_dump_file;
742 FILE *dbr_sched_dump_file;
743 FILE *stack_reg_dump_file;
745 /* Time accumulators, to count the total time spent in various passes. */
749 int integration_time;
757 int local_alloc_time;
758 int global_alloc_time;
761 int shorten_branch_time;
767 /* Return time used so far, in microseconds. */
776 struct rusage rusage;
781 int proc_system_time;
783 int child_system_time;
793 return (tms.tms_utime + tms.tms_stime) * (1000000 / HZ);
796 getrusage (0, &rusage);
797 return (rusage.ru_utime.tv_sec * 1000000 + rusage.ru_utime.tv_usec
798 + rusage.ru_stime.tv_sec * 1000000 + rusage.ru_stime.tv_usec);
801 return (vms_times.proc_user_time + vms_times.proc_system_time) * 10000;
806 #define TIMEVAR(VAR, BODY) \
807 do { int otime = get_run_time (); BODY; VAR += get_run_time () - otime; } while (0)
810 print_time (str, total)
815 "time in %s: %d.%06d\n",
816 str, total / 1000000, total % 1000000);
819 /* Count an error or warning. Return 1 if the message should be printed. */
822 count_error (warningp)
825 if (warningp && inhibit_warnings)
828 if (warningp && !warnings_are_errors)
832 static int warning_message = 0;
834 if (warningp && !warning_message)
836 fprintf (stderr, "%s: warnings being treated as errors\n", progname);
845 /* Print a fatal error message. NAME is the text.
846 Also include a system error message based on `errno'. */
849 pfatal_with_name (name)
852 fprintf (stderr, "%s: ", progname);
858 fatal_io_error (name)
861 fprintf (stderr, "%s: %s: I/O error\n", progname, name);
874 /* Called to give a better error message when we don't have an insn to match
875 what we are looking for or if the insn's constraints aren't satisfied,
876 rather than just calling abort(). */
879 fatal_insn_not_found (insn)
882 if (INSN_CODE (insn) < 0)
883 error ("internal error--unrecognizable insn:", 0);
885 error ("internal error--insn does not satisfy its constraints:", 0);
888 fflush (asm_out_file);
890 fflush (aux_info_file);
892 fflush (rtl_dump_file);
893 if (jump_opt_dump_file)
894 fflush (jump_opt_dump_file);
896 fflush (cse_dump_file);
898 fflush (loop_dump_file);
900 fflush (cse2_dump_file);
902 fflush (flow_dump_file);
903 if (combine_dump_file)
904 fflush (combine_dump_file);
906 fflush (sched_dump_file);
907 if (local_reg_dump_file)
908 fflush (local_reg_dump_file);
909 if (global_reg_dump_file)
910 fflush (global_reg_dump_file);
911 if (sched2_dump_file)
912 fflush (sched2_dump_file);
913 if (jump2_opt_dump_file)
914 fflush (jump2_opt_dump_file);
915 if (dbr_sched_dump_file)
916 fflush (dbr_sched_dump_file);
917 if (stack_reg_dump_file)
918 fflush (stack_reg_dump_file);
922 /* This is the default decl_printable_name function. */
925 decl_name (decl, kind)
929 return IDENTIFIER_POINTER (DECL_NAME (decl));
932 static int need_error_newline;
934 /* Function of last error message;
935 more generally, function such that if next error message is in it
936 then we don't have to mention the function name. */
937 static tree last_error_function = NULL;
939 /* Used to detect when input_file_stack has changed since last described. */
940 static int last_error_tick;
942 /* Called when the start of a function definition is parsed,
943 this function prints on stderr the name of the function. */
946 announce_function (decl)
952 if (rtl_dump_and_exit)
953 fprintf (stderr, "%s ", IDENTIFIER_POINTER (DECL_NAME (decl)));
955 fprintf (stderr, " %s", (*decl_printable_name) (decl, &junk));
957 need_error_newline = 1;
958 last_error_function = current_function_decl;
962 /* Prints out, if necessary, the name of the current function
963 which caused an error. Called from all error and warning functions. */
966 report_error_function (file)
969 struct file_stack *p;
971 if (need_error_newline)
973 fprintf (stderr, "\n");
974 need_error_newline = 0;
977 if (last_error_function != current_function_decl)
979 char *kind = "function";
980 if (current_function_decl != 0
981 && TREE_CODE (TREE_TYPE (current_function_decl)) == METHOD_TYPE)
985 fprintf (stderr, "%s: ", file);
987 if (current_function_decl == NULL)
988 fprintf (stderr, "At top level:\n");
991 char *name = (*decl_printable_name) (current_function_decl, &kind);
992 fprintf (stderr, "In %s `%s':\n", kind, name);
995 last_error_function = current_function_decl;
997 if (input_file_stack && input_file_stack->next != 0
998 && input_file_stack_tick != last_error_tick)
1000 fprintf (stderr, "In file included");
1001 for (p = input_file_stack->next; p; p = p->next)
1003 fprintf (stderr, " from %s:%d", p->name, p->line);
1005 fprintf (stderr, ",\n ");
1007 fprintf (stderr, ":\n");
1008 last_error_tick = input_file_stack_tick;
1012 /* Report an error at the current line number.
1013 S is a string and V and V2 are args for `printf'. We use HOST_WIDE_INT
1014 as the type for these args assuming it is wide enough to hold a
1015 pointer. This isn't terribly portable, but is the best we can do
1016 without vprintf universally available. */
1021 HOST_WIDE_INT v; /* Also used as pointer */
1022 HOST_WIDE_INT v2; /* Also used as pointer */
1024 error_with_file_and_line (input_filename, lineno, s, v, v2);
1027 /* Report an error at line LINE of file FILE.
1028 S and V are a string and an arg for `printf'. */
1031 error_with_file_and_line (file, line, s, v, v2)
1040 report_error_function (file);
1043 fprintf (stderr, "%s:%d: ", file, line);
1045 fprintf (stderr, "%s: ", progname);
1046 fprintf (stderr, s, v, v2);
1047 fprintf (stderr, "\n");
1050 /* Report an error at the declaration DECL.
1051 S and V are a string and an arg which uses %s to substitute
1052 the declaration name. */
1055 error_with_decl (decl, s, v)
1063 report_error_function (DECL_SOURCE_FILE (decl));
1065 fprintf (stderr, "%s:%d: ",
1066 DECL_SOURCE_FILE (decl), DECL_SOURCE_LINE (decl));
1068 if (DECL_NAME (decl))
1069 fprintf (stderr, s, (*decl_printable_name) (decl, &junk), v);
1071 fprintf (stderr, s, "((anonymous))", v);
1072 fprintf (stderr, "\n");
1075 /* Report an error at the line number of the insn INSN.
1076 S and V are a string and an arg for `printf'.
1077 This is used only when INSN is an `asm' with operands,
1078 and each ASM_OPERANDS records its own source file and line. */
1081 error_for_asm (insn, s, v, v2)
1084 HOST_WIDE_INT v; /* Also used as pointer */
1085 HOST_WIDE_INT v2; /* Also used as pointer */
1089 rtx body = PATTERN (insn);
1092 /* Find the (or one of the) ASM_OPERANDS in the insn. */
1093 if (GET_CODE (body) == SET && GET_CODE (SET_SRC (body)) == ASM_OPERANDS)
1094 asmop = SET_SRC (body);
1095 else if (GET_CODE (body) == ASM_OPERANDS)
1097 else if (GET_CODE (body) == PARALLEL
1098 && GET_CODE (XVECEXP (body, 0, 0)) == SET)
1099 asmop = SET_SRC (XVECEXP (body, 0, 0));
1100 else if (GET_CODE (body) == PARALLEL
1101 && GET_CODE (XVECEXP (body, 0, 0)) == ASM_OPERANDS)
1102 asmop = XVECEXP (body, 0, 0);
1104 filename = ASM_OPERANDS_SOURCE_FILE (asmop);
1105 line = ASM_OPERANDS_SOURCE_LINE (asmop);
1107 error_with_file_and_line (filename, line, s, v, v2);
1110 /* Report a warning at line LINE.
1111 S and V are a string and an arg for `printf'. */
1114 warning_with_file_and_line (file, line, s, v, v2, v3)
1118 HOST_WIDE_INT v, v2, v3;
1120 if (count_error (1) == 0)
1123 report_error_function (file);
1126 fprintf (stderr, "%s:%d: ", file, line);
1128 fprintf (stderr, "%s: ", progname);
1130 fprintf (stderr, "warning: ");
1131 fprintf (stderr, s, v, v2, v3);
1132 fprintf (stderr, "\n");
1135 /* Report a warning at the current line number.
1136 S and V are a string and an arg for `printf'. */
1139 warning (s, v, v2, v3)
1141 HOST_WIDE_INT v, v2, v3; /* Also used as pointer */
1143 warning_with_file_and_line (input_filename, lineno, s, v, v2, v3);
1146 /* Report a warning at the declaration DECL.
1147 S is string which uses %s to substitute the declaration name.
1148 V is a second parameter that S can refer to. */
1151 warning_with_decl (decl, s, v)
1158 if (count_error (1) == 0)
1161 report_error_function (DECL_SOURCE_FILE (decl));
1163 fprintf (stderr, "%s:%d: ",
1164 DECL_SOURCE_FILE (decl), DECL_SOURCE_LINE (decl));
1166 fprintf (stderr, "warning: ");
1167 if (DECL_NAME (decl))
1168 fprintf (stderr, s, (*decl_printable_name) (decl, &junk), v);
1170 fprintf (stderr, s, "((anonymous))", v);
1171 fprintf (stderr, "\n");
1174 /* Report a warning at the line number of the insn INSN.
1175 S and V are a string and an arg for `printf'.
1176 This is used only when INSN is an `asm' with operands,
1177 and each ASM_OPERANDS records its own source file and line. */
1180 warning_for_asm (insn, s, v, v2)
1183 HOST_WIDE_INT v; /* Also used as pointer */
1184 HOST_WIDE_INT v2; /* Also used as pointer */
1188 rtx body = PATTERN (insn);
1191 /* Find the (or one of the) ASM_OPERANDS in the insn. */
1192 if (GET_CODE (body) == SET && GET_CODE (SET_SRC (body)) == ASM_OPERANDS)
1193 asmop = SET_SRC (body);
1194 else if (GET_CODE (body) == ASM_OPERANDS)
1196 else if (GET_CODE (body) == PARALLEL
1197 && GET_CODE (XVECEXP (body, 0, 0)) == SET)
1198 asmop = SET_SRC (XVECEXP (body, 0, 0));
1199 else if (GET_CODE (body) == PARALLEL
1200 && GET_CODE (XVECEXP (body, 0, 0)) == ASM_OPERANDS)
1201 asmop = XVECEXP (body, 0, 0);
1203 filename = ASM_OPERANDS_SOURCE_FILE (asmop);
1204 line = ASM_OPERANDS_SOURCE_LINE (asmop);
1206 warning_with_file_and_line (filename, line, s, v, v2);
1209 /* These functions issue either warnings or errors depending on
1210 -pedantic-errors. */
1215 HOST_WIDE_INT v; /* Also used as pointer */
1218 if (flag_pedantic_errors)
1225 pedwarn_with_decl (decl, s, v)
1230 if (flag_pedantic_errors)
1231 error_with_decl (decl, s, v);
1233 warning_with_decl (decl, s, v);
1237 pedwarn_with_file_and_line (file, line, s, v, v2)
1244 if (flag_pedantic_errors)
1245 error_with_file_and_line (file, line, s, v, v2);
1247 warning_with_file_and_line (file, line, s, v, v2);
1250 /* Apologize for not implementing some feature.
1251 S, V, and V2 are a string and args for `printf'. */
1256 HOST_WIDE_INT v, v2;
1260 fprintf (stderr, "%s:%d: ", input_filename, lineno);
1262 fprintf (stderr, "%s: ", progname);
1264 fprintf (stderr, "sorry, not implemented: ");
1265 fprintf (stderr, s, v, v2);
1266 fprintf (stderr, "\n");
1269 /* Apologize for not implementing some feature, then quit.
1270 S, V, and V2 are a string and args for `printf'. */
1273 really_sorry (s, v, v2)
1275 HOST_WIDE_INT v, v2;
1278 fprintf (stderr, "%s:%d: ", input_filename, lineno);
1280 fprintf (stderr, "%s: ", progname);
1282 fprintf (stderr, "sorry, not implemented: ");
1283 fprintf (stderr, s, v, v2);
1284 fatal (" (fatal)\n");
1287 /* More 'friendly' abort that prints the line and file.
1288 config.h can #define abort fancy_abort if you like that sort of thing.
1290 I don't think this is actually a good idea.
1291 Other sorts of crashes will look a certain way.
1292 It is a good thing if crashes from calling abort look the same way.
1298 fatal ("internal gcc abort");
1301 /* This calls abort and is used to avoid problems when abort if a macro.
1302 It is used when we need to pass the address of abort. */
1310 /* When `malloc.c' is compiled with `rcheck' defined,
1311 it calls this function to report clobberage. */
1319 /* Same as `malloc' but report error if no memory available. */
1325 register char *value = (char *) malloc (size);
1327 fatal ("virtual memory exhausted");
1331 /* Same as `realloc' but report error if no memory available. */
1334 xrealloc (ptr, size)
1338 char *result = (char *) realloc (ptr, size);
1340 fatal ("virtual memory exhausted");
1344 /* Return the logarithm of X, base 2, considering X unsigned,
1345 if X is a power of 2. Otherwise, returns -1.
1347 This should be used via the `exact_log2' macro. */
1351 register unsigned HOST_WIDE_INT x;
1353 register int log = 0;
1354 /* Test for 0 or a power of 2. */
1355 if (x == 0 || x != (x & -x))
1357 while ((x >>= 1) != 0)
1362 /* Given X, an unsigned number, return the largest int Y such that 2**Y <= X.
1363 If X is 0, return -1.
1365 This should be used via the floor_log2 macro. */
1369 register unsigned HOST_WIDE_INT x;
1371 register int log = -1;
1379 jmp_buf float_handler;
1381 /* Specify where to longjmp to when a floating arithmetic error happens.
1382 If HANDLER is 0, it means don't handle the errors any more. */
1385 set_float_handler (handler)
1388 float_handled = (handler != 0);
1390 bcopy (handler, float_handler, sizeof (float_handler));
1393 /* Specify, in HANDLER, where to longjmp to when a floating arithmetic
1394 error happens, pushing the previous specification into OLD_HANDLER.
1395 Return an indication of whether there was a previous handler in effect. */
1398 push_float_handler (handler, old_handler)
1399 jmp_buf handler, old_handler;
1401 int was_handled = float_handled;
1405 bcopy (float_handler, old_handler, sizeof (float_handler));
1406 bcopy (handler, float_handler, sizeof (float_handler));
1410 /* Restore the previous specification of whether and where to longjmp to
1411 when a floating arithmetic error happens. */
1414 pop_float_handler (handled, handler)
1418 float_handled = handled;
1420 bcopy (handler, float_handler, sizeof (float_handler));
1423 /* Signals actually come here. */
1426 float_signal (signo)
1427 /* If this is missing, some compilers complain. */
1430 if (float_handled == 0)
1432 #if defined (USG) || defined (hpux)
1433 signal (SIGFPE, float_signal); /* re-enable the signal catcher */
1436 signal (SIGFPE, float_signal);
1437 longjmp (float_handler, 1);
1440 /* Handler for SIGPIPE. */
1444 /* If this is missing, some compilers complain. */
1447 fatal ("output pipe has been closed");
1450 /* Strip off a legitimate source ending from the input string NAME of
1454 strip_off_ending (name, len)
1458 if (len > 2 && ! strcmp (".c", name + len - 2))
1460 else if (len > 2 && ! strcmp (".m", name + len - 2))
1462 else if (len > 2 && ! strcmp (".i", name + len - 2))
1464 else if (len > 3 && ! strcmp (".ii", name + len - 3))
1466 else if (len > 3 && ! strcmp (".co", name + len - 3))
1468 else if (len > 3 && ! strcmp (".cc", name + len - 3))
1470 else if (len > 2 && ! strcmp (".C", name + len - 2))
1472 else if (len > 4 && ! strcmp (".cxx", name + len - 4))
1474 else if (len > 2 && ! strcmp (".f", name + len - 2))
1476 else if (len > 4 && ! strcmp (".ada", name + len - 4))
1478 else if (len > 4 && ! strcmp (".atr", name + len - 4))
1482 /* Output a file name in the form wanted by System V. */
1485 output_file_directive (asm_file, input_name)
1489 int len = strlen (input_name);
1490 char *na = input_name + len;
1492 /* NA gets INPUT_NAME sans directory names. */
1493 while (na > input_name)
1500 #ifdef ASM_OUTPUT_MAIN_SOURCE_FILENAME
1501 ASM_OUTPUT_MAIN_SOURCE_FILENAME (asm_file, na);
1503 #ifdef ASM_OUTPUT_SOURCE_FILENAME
1504 ASM_OUTPUT_SOURCE_FILENAME (asm_file, na);
1506 fprintf (asm_file, "\t.file\t\"%s\"\n", na);
1511 /* Routine to build language identifier for object file. */
1513 output_lang_identify (asm_out_file)
1516 int len = strlen (lang_identify ()) + sizeof ("__gnu_compiled_") + 1;
1517 char *s = (char *) alloca (len);
1518 sprintf (s, "__gnu_compiled_%s", lang_identify ());
1519 ASM_OUTPUT_LABEL (asm_out_file, s);
1522 /* Compile an entire file of output from cpp, named NAME.
1523 Write a file of assembly output and various debugging dumps. */
1531 int dump_base_name_length;
1533 int name_specified = name != 0;
1535 if (dump_base_name == 0)
1536 dump_base_name = name ? name : "gccdump";
1537 dump_base_name_length = strlen (dump_base_name);
1541 integration_time = 0;
1549 local_alloc_time = 0;
1550 global_alloc_time = 0;
1553 shorten_branch_time = 0;
1559 /* Open input file. */
1561 if (name == 0 || !strcmp (name, "-"))
1567 finput = fopen (name, "r");
1569 pfatal_with_name (name);
1571 #ifdef IO_BUFFER_SIZE
1572 setvbuf (finput, (char *) xmalloc (IO_BUFFER_SIZE), _IOFBF, IO_BUFFER_SIZE);
1575 /* Initialize data in various passes. */
1581 init_emit_once (debug_info_level == DINFO_LEVEL_NORMAL
1582 || debug_info_level == DINFO_LEVEL_VERBOSE);
1583 init_decl_processing ();
1591 if (flag_caller_saves)
1592 init_caller_save ();
1594 /* If auxiliary info generation is desired, open the output file.
1595 This goes in the same directory as the source file--unlike
1596 all the other output files. */
1597 if (flag_gen_aux_info)
1599 aux_info_file = fopen (aux_info_file_name, "w");
1600 if (aux_info_file == 0)
1601 pfatal_with_name (aux_info_file_name);
1604 /* If rtl 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, ".rtl");
1610 rtl_dump_file = fopen (dumpname, "w");
1611 if (rtl_dump_file == 0)
1612 pfatal_with_name (dumpname);
1615 /* If jump_opt 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, ".jump");
1621 jump_opt_dump_file = fopen (dumpname, "w");
1622 if (jump_opt_dump_file == 0)
1623 pfatal_with_name (dumpname);
1626 /* If cse dump desired, open the output file. */
1629 register char *dumpname = (char *) xmalloc (dump_base_name_length + 6);
1630 strcpy (dumpname, dump_base_name);
1631 strcat (dumpname, ".cse");
1632 cse_dump_file = fopen (dumpname, "w");
1633 if (cse_dump_file == 0)
1634 pfatal_with_name (dumpname);
1637 /* If loop dump desired, open the output file. */
1640 register char *dumpname = (char *) xmalloc (dump_base_name_length + 6);
1641 strcpy (dumpname, dump_base_name);
1642 strcat (dumpname, ".loop");
1643 loop_dump_file = fopen (dumpname, "w");
1644 if (loop_dump_file == 0)
1645 pfatal_with_name (dumpname);
1648 /* If cse2 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, ".cse2");
1654 cse2_dump_file = fopen (dumpname, "w");
1655 if (cse2_dump_file == 0)
1656 pfatal_with_name (dumpname);
1659 /* If flow dump desired, open the output file. */
1662 register char *dumpname = (char *) xmalloc (dump_base_name_length + 6);
1663 strcpy (dumpname, dump_base_name);
1664 strcat (dumpname, ".flow");
1665 flow_dump_file = fopen (dumpname, "w");
1666 if (flow_dump_file == 0)
1667 pfatal_with_name (dumpname);
1670 /* If combine dump desired, open the output file. */
1673 register char *dumpname = (char *) xmalloc (dump_base_name_length + 10);
1674 strcpy (dumpname, dump_base_name);
1675 strcat (dumpname, ".combine");
1676 combine_dump_file = fopen (dumpname, "w");
1677 if (combine_dump_file == 0)
1678 pfatal_with_name (dumpname);
1681 /* If scheduling 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, ".sched");
1687 sched_dump_file = fopen (dumpname, "w");
1688 if (sched_dump_file == 0)
1689 pfatal_with_name (dumpname);
1692 /* If local_reg dump desired, open the output file. */
1695 register char *dumpname = (char *) xmalloc (dump_base_name_length + 6);
1696 strcpy (dumpname, dump_base_name);
1697 strcat (dumpname, ".lreg");
1698 local_reg_dump_file = fopen (dumpname, "w");
1699 if (local_reg_dump_file == 0)
1700 pfatal_with_name (dumpname);
1703 /* If global_reg dump desired, open the output file. */
1704 if (global_reg_dump)
1706 register char *dumpname = (char *) xmalloc (dump_base_name_length + 6);
1707 strcpy (dumpname, dump_base_name);
1708 strcat (dumpname, ".greg");
1709 global_reg_dump_file = fopen (dumpname, "w");
1710 if (global_reg_dump_file == 0)
1711 pfatal_with_name (dumpname);
1714 /* If 2nd scheduling dump desired, open the output file. */
1717 register char *dumpname = (char *) xmalloc (dump_base_name_length + 8);
1718 strcpy (dumpname, dump_base_name);
1719 strcat (dumpname, ".sched2");
1720 sched2_dump_file = fopen (dumpname, "w");
1721 if (sched2_dump_file == 0)
1722 pfatal_with_name (dumpname);
1725 /* If jump2_opt dump desired, open the output file. */
1728 register char *dumpname = (char *) xmalloc (dump_base_name_length + 7);
1729 strcpy (dumpname, dump_base_name);
1730 strcat (dumpname, ".jump2");
1731 jump2_opt_dump_file = fopen (dumpname, "w");
1732 if (jump2_opt_dump_file == 0)
1733 pfatal_with_name (dumpname);
1736 /* If dbr_sched dump desired, open the output file. */
1739 register char *dumpname = (char *) xmalloc (dump_base_name_length + 7);
1740 strcpy (dumpname, dump_base_name);
1741 strcat (dumpname, ".dbr");
1742 dbr_sched_dump_file = fopen (dumpname, "w");
1743 if (dbr_sched_dump_file == 0)
1744 pfatal_with_name (dumpname);
1749 /* If stack_reg dump desired, open the output file. */
1752 register char *dumpname = (char *) xmalloc (dump_base_name_length + 10);
1753 strcpy (dumpname, dump_base_name);
1754 strcat (dumpname, ".stack");
1755 stack_reg_dump_file = fopen (dumpname, "w");
1756 if (stack_reg_dump_file == 0)
1757 pfatal_with_name (dumpname);
1762 /* Open assembler code output file. */
1764 if (! name_specified && asm_file_name == 0)
1765 asm_out_file = stdout;
1768 register char *dumpname = (char *) xmalloc (dump_base_name_length + 6);
1769 int len = strlen (dump_base_name);
1770 strcpy (dumpname, dump_base_name);
1771 strip_off_ending (dumpname, len);
1772 strcat (dumpname, ".s");
1773 if (asm_file_name == 0)
1775 asm_file_name = (char *) xmalloc (strlen (dumpname) + 1);
1776 strcpy (asm_file_name, dumpname);
1778 if (!strcmp (asm_file_name, "-"))
1779 asm_out_file = stdout;
1781 asm_out_file = fopen (asm_file_name, "w");
1782 if (asm_out_file == 0)
1783 pfatal_with_name (asm_file_name);
1786 #ifdef IO_BUFFER_SIZE
1787 setvbuf (asm_out_file, (char *) xmalloc (IO_BUFFER_SIZE),
1788 _IOFBF, IO_BUFFER_SIZE);
1791 input_filename = name;
1793 /* Perform language-specific initialization.
1794 This may set main_input_filename. */
1797 /* If the input doesn't start with a #line, use the input name
1798 as the official input file name. */
1799 if (main_input_filename == 0)
1800 main_input_filename = name;
1802 /* Put an entry on the input file stack for the main input file. */
1804 = (struct file_stack *) xmalloc (sizeof (struct file_stack));
1805 input_file_stack->next = 0;
1806 input_file_stack->name = input_filename;
1808 ASM_FILE_START (asm_out_file);
1810 /* Output something to inform GDB that this compilation was by GCC. */
1811 #ifndef ASM_IDENTIFY_GCC
1812 fprintf (asm_out_file, "gcc2_compiled.:\n");
1814 ASM_IDENTIFY_GCC (asm_out_file);
1817 /* Output something to identify which front-end produced this file. */
1818 #ifdef ASM_IDENTIFY_LANGUAGE
1819 ASM_IDENTIFY_LANGUAGE (asm_out_file);
1822 /* ??? Note: There used to be a conditional here
1823 to call assemble_zeros without fail if DBX_DEBUGGING_INFO is defined.
1824 This was to guarantee separation between gcc_compiled. and
1825 the first function, for the sake of dbx on Suns.
1826 However, having the extra zero here confused the Emacs
1827 code for unexec, and might confuse other programs too.
1828 Therefore, I took out that change.
1829 In future versions we should find another way to solve
1830 that dbx problem. -- rms, 23 May 93. */
1832 /* Don't let the first function fall at the same address
1833 as gcc_compiled., if profiling. */
1834 if (profile_flag || profile_block_flag)
1835 assemble_zeros (UNITS_PER_WORD);
1837 /* If dbx symbol table desired, initialize writing it
1838 and output the predefined types. */
1839 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
1840 if (write_symbols == DBX_DEBUG || write_symbols == XCOFF_DEBUG)
1841 TIMEVAR (symout_time, dbxout_init (asm_out_file, main_input_filename,
1844 #ifdef SDB_DEBUGGING_INFO
1845 if (write_symbols == SDB_DEBUG)
1846 TIMEVAR (symout_time, sdbout_init (asm_out_file, main_input_filename,
1849 #ifdef DWARF_DEBUGGING_INFO
1850 if (write_symbols == DWARF_DEBUG)
1851 TIMEVAR (symout_time, dwarfout_init (asm_out_file, main_input_filename));
1854 /* Initialize yet another pass. */
1856 init_final (main_input_filename);
1858 start_time = get_run_time ();
1860 /* Call the parser, which parses the entire file
1861 (calling rest_of_compilation for each function). */
1863 if (yyparse () != 0)
1864 if (errorcount == 0)
1865 fprintf (stderr, "Errors detected in input file (your bison.simple is out of date)");
1867 /* Compilation is now finished except for writing
1868 what's left of the symbol table output. */
1870 parse_time += get_run_time () - start_time;
1872 parse_time -= integration_time;
1873 parse_time -= varconst_time;
1875 globals = getdecls ();
1877 /* Really define vars that have had only a tentative definition.
1878 Really output inline functions that must actually be callable
1879 and have not been output so far. */
1882 int len = list_length (globals);
1883 tree *vec = (tree *) alloca (sizeof (tree) * len);
1887 /* Process the decls in reverse order--earliest first.
1888 Put them into VEC from back to front, then take out from front. */
1890 for (i = 0, decl = globals; i < len; i++, decl = TREE_CHAIN (decl))
1891 vec[len - i - 1] = decl;
1893 for (i = 0; i < len; i++)
1896 if (TREE_CODE (decl) == VAR_DECL && DECL_SIZE (decl) == 0
1897 && incomplete_decl_finalize_hook != 0)
1898 (*incomplete_decl_finalize_hook) (decl);
1900 if (TREE_CODE (decl) == VAR_DECL && TREE_STATIC (decl)
1901 && ! TREE_ASM_WRITTEN (decl))
1903 /* Don't write out static consts, unless we used them.
1904 (This used to write them out only if the address was
1905 taken, but that was wrong; if the variable was simply
1906 referred to, it still needs to exist or else it will
1907 be undefined in the linker.) */
1908 if (! TREE_READONLY (decl)
1909 || TREE_PUBLIC (decl)
1911 || TREE_ADDRESSABLE (decl)
1912 || TREE_ADDRESSABLE (DECL_ASSEMBLER_NAME (decl)))
1913 rest_of_decl_compilation (decl, NULL_PTR, 1, 1);
1915 /* Cancel the RTL for this decl so that, if debugging info
1916 output for global variables is still to come,
1917 this one will be omitted. */
1918 DECL_RTL (decl) = NULL;
1921 if (TREE_CODE (decl) == FUNCTION_DECL
1922 && ! TREE_ASM_WRITTEN (decl)
1923 && DECL_INITIAL (decl) != 0
1924 && (TREE_ADDRESSABLE (decl)
1925 || TREE_ADDRESSABLE (DECL_ASSEMBLER_NAME (decl)))
1926 && ! DECL_EXTERNAL (decl))
1927 output_inline_function (decl);
1929 /* Warn about any function
1930 declared static but not defined.
1931 We don't warn about variables,
1932 because many programs have static variables
1933 that exist only to get some text into the object file. */
1936 || (DECL_NAME (decl) && TREE_USED (DECL_NAME (decl))))
1937 && TREE_CODE (decl) == FUNCTION_DECL
1938 && DECL_INITIAL (decl) == 0
1939 && DECL_EXTERNAL (decl)
1940 && ! TREE_PUBLIC (decl))
1942 /* This should be a pedwarn, except that there is
1943 no easy way to prevent it from happening when the
1944 name is used only inside a sizeof.
1945 This at least avoids being incorrect. */
1946 warning_with_decl (decl,
1947 "`%s' declared `static' but never defined");
1948 /* This symbol is effectively an "extern" declaration now. */
1949 TREE_PUBLIC (decl) = 1;
1950 assemble_external (decl);
1953 /* Warn about static fns or vars defined but not used,
1954 but not about inline functions
1955 since unused inline statics is normal practice. */
1957 && (TREE_CODE (decl) == FUNCTION_DECL
1958 || TREE_CODE (decl) == VAR_DECL)
1959 && ! DECL_IN_SYSTEM_HEADER (decl)
1960 && ! DECL_EXTERNAL (decl)
1961 && ! TREE_PUBLIC (decl)
1962 && ! TREE_USED (decl)
1963 && ! DECL_INLINE (decl)
1964 && ! DECL_REGISTER (decl)
1965 /* The TREE_USED bit for file-scope decls
1966 is kept in the identifier, to handle multiple
1967 external decls in different scopes. */
1968 && ! TREE_USED (DECL_NAME (decl)))
1969 warning_with_decl (decl, "`%s' defined but not used");
1971 #ifdef SDB_DEBUGGING_INFO
1972 /* The COFF linker can move initialized global vars to the end.
1973 And that can screw up the symbol ordering.
1974 By putting the symbols in that order to begin with,
1975 we avoid a problem. mcsun!unido!fauern!tumuc!pes@uunet.uu.net. */
1976 if (write_symbols == SDB_DEBUG && TREE_CODE (decl) == VAR_DECL
1977 && TREE_PUBLIC (decl) && DECL_INITIAL (decl)
1978 && DECL_RTL (decl) != 0)
1979 TIMEVAR (symout_time, sdbout_symbol (decl, 0));
1981 /* Output COFF information for non-global
1982 file-scope initialized variables. */
1983 if (write_symbols == SDB_DEBUG
1984 && TREE_CODE (decl) == VAR_DECL
1985 && DECL_INITIAL (decl)
1986 && DECL_RTL (decl) != 0
1987 && GET_CODE (DECL_RTL (decl)) == MEM)
1988 TIMEVAR (symout_time, sdbout_toplevel_data (decl));
1989 #endif /* SDB_DEBUGGING_INFO */
1990 #ifdef DWARF_DEBUGGING_INFO
1991 /* Output DWARF information for file-scope tentative data object
1992 declarations, file-scope (extern) function declarations (which
1993 had no corresponding body) and file-scope tagged type declarations
1994 and definitions which have not yet been forced out. */
1996 if (write_symbols == DWARF_DEBUG
1997 && (TREE_CODE (decl) != FUNCTION_DECL || !DECL_INITIAL (decl)))
1998 TIMEVAR (symout_time, dwarfout_file_scope_decl (decl, 1));
2003 /* Do dbx symbols */
2004 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
2005 if (write_symbols == DBX_DEBUG || write_symbols == XCOFF_DEBUG)
2006 TIMEVAR (symout_time,
2008 dbxout_finish (asm_out_file, main_input_filename);
2012 #ifdef DWARF_DEBUGGING_INFO
2013 if (write_symbols == DWARF_DEBUG)
2014 TIMEVAR (symout_time,
2020 /* Output some stuff at end of file if nec. */
2022 end_final (main_input_filename);
2025 ASM_FILE_END (asm_out_file);
2028 after_finish_compilation:
2030 /* Language-specific end of compilation actions. */
2034 /* Close the dump files. */
2036 if (flag_gen_aux_info)
2038 fclose (aux_info_file);
2040 unlink (aux_info_file_name);
2044 fclose (rtl_dump_file);
2047 fclose (jump_opt_dump_file);
2050 fclose (cse_dump_file);
2053 fclose (loop_dump_file);
2056 fclose (cse2_dump_file);
2059 fclose (flow_dump_file);
2063 dump_combine_total_stats (combine_dump_file);
2064 fclose (combine_dump_file);
2068 fclose (sched_dump_file);
2071 fclose (local_reg_dump_file);
2073 if (global_reg_dump)
2074 fclose (global_reg_dump_file);
2077 fclose (sched2_dump_file);
2080 fclose (jump2_opt_dump_file);
2083 fclose (dbr_sched_dump_file);
2087 fclose (stack_reg_dump_file);
2090 /* Close non-debugging input and output files. Take special care to note
2091 whether fclose returns an error, since the pages might still be on the
2092 buffer chain while the file is open. */
2095 if (ferror (asm_out_file) != 0 || fclose (asm_out_file) != 0)
2096 fatal_io_error (asm_file_name);
2098 /* Print the times. */
2102 fprintf (stderr,"\n");
2103 print_time ("parse", parse_time);
2104 print_time ("integration", integration_time);
2105 print_time ("jump", jump_time);
2106 print_time ("cse", cse_time);
2107 print_time ("loop", loop_time);
2108 print_time ("cse2", cse2_time);
2109 print_time ("flow", flow_time);
2110 print_time ("combine", combine_time);
2111 print_time ("sched", sched_time);
2112 print_time ("local-alloc", local_alloc_time);
2113 print_time ("global-alloc", global_alloc_time);
2114 print_time ("sched2", sched2_time);
2115 print_time ("dbranch", dbr_sched_time);
2116 print_time ("shorten-branch", shorten_branch_time);
2117 print_time ("stack-reg", stack_reg_time);
2118 print_time ("final", final_time);
2119 print_time ("varconst", varconst_time);
2120 print_time ("symout", symout_time);
2121 print_time ("dump", dump_time);
2125 /* This is called from various places for FUNCTION_DECL, VAR_DECL,
2126 and TYPE_DECL nodes.
2128 This does nothing for local (non-static) variables.
2129 Otherwise, it sets up the RTL and outputs any assembler code
2130 (label definition, storage allocation and initialization).
2132 DECL is the declaration. If ASMSPEC is nonzero, it specifies
2133 the assembler symbol name to be used. TOP_LEVEL is nonzero
2134 if this declaration is not within a function. */
2137 rest_of_decl_compilation (decl, asmspec, top_level, at_end)
2143 /* Declarations of variables, and of functions defined elsewhere. */
2145 /* Forward declarations for nested functions are not "external",
2146 but we need to treat them as if they were. */
2147 if (TREE_STATIC (decl) || DECL_EXTERNAL (decl)
2148 || TREE_CODE (decl) == FUNCTION_DECL)
2149 TIMEVAR (varconst_time,
2151 make_decl_rtl (decl, asmspec, top_level);
2152 /* For a user-invisible decl that should be replaced
2153 by its value when used, don't output anything. */
2154 if (! (TREE_CODE (decl) == VAR_DECL
2155 && DECL_IGNORED_P (decl) && TREE_READONLY (decl)
2156 && DECL_INITIAL (decl) != 0))
2157 /* Don't output anything
2158 when a tentative file-scope definition is seen.
2159 But at end of compilation, do output code for them. */
2160 if (! (! at_end && top_level
2161 && (DECL_INITIAL (decl) == 0
2162 || DECL_INITIAL (decl) == error_mark_node
2163 || DECL_IGNORED_P (decl))))
2164 assemble_variable (decl, top_level, at_end);
2166 else if (DECL_REGISTER (decl) && asmspec != 0)
2168 if (decode_reg_name (asmspec) >= 0)
2170 DECL_RTL (decl) = 0;
2171 make_decl_rtl (decl, asmspec, top_level);
2174 error ("invalid register name `%s' for register variable", asmspec);
2176 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
2177 else if ((write_symbols == DBX_DEBUG || write_symbols == XCOFF_DEBUG)
2178 && TREE_CODE (decl) == TYPE_DECL)
2179 TIMEVAR (symout_time, dbxout_symbol (decl, 0));
2181 #ifdef SDB_DEBUGGING_INFO
2182 else if (write_symbols == SDB_DEBUG && top_level
2183 && TREE_CODE (decl) == TYPE_DECL)
2184 TIMEVAR (symout_time, sdbout_symbol (decl, 0));
2188 /* Called after finishing a record, union or enumeral type. */
2191 rest_of_type_compilation (type, toplev)
2195 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
2196 if (write_symbols == DBX_DEBUG || write_symbols == XCOFF_DEBUG)
2197 TIMEVAR (symout_time, dbxout_symbol (TYPE_STUB_DECL (type), !toplev));
2199 #ifdef SDB_DEBUGGING_INFO
2200 if (write_symbols == SDB_DEBUG)
2201 TIMEVAR (symout_time, sdbout_symbol (TYPE_STUB_DECL (type), !toplev));
2205 /* This is called from finish_function (within yyparse)
2206 after each top-level definition is parsed.
2207 It is supposed to compile that function or variable
2208 and output the assembler code for it.
2209 After we return, the tree storage is freed. */
2212 rest_of_compilation (decl)
2216 int start_time = get_run_time ();
2218 /* Nonzero if we have saved the original DECL_INITIAL of the function,
2219 to be restored after we finish compiling the function
2220 (for use when compiling inline calls to this function). */
2221 tree saved_block_tree = 0;
2222 /* Likewise, for DECL_ARGUMENTS. */
2223 tree saved_arguments = 0;
2226 /* If we are reconsidering an inline function
2227 at the end of compilation, skip the stuff for making it inline. */
2229 if (DECL_SAVED_INSNS (decl) == 0)
2231 int specd = DECL_INLINE (decl);
2234 /* If requested, consider whether to make this function inline. */
2235 if (specd || flag_inline_functions)
2236 TIMEVAR (integration_time,
2238 lose = function_cannot_inline_p (decl);
2241 if (warn_inline && specd)
2242 warning_with_decl (decl, lose);
2243 DECL_INLINE (decl) = 0;
2246 DECL_INLINE (decl) = 1;
2249 insns = get_insns ();
2251 /* Dump the rtl code if we are dumping rtl. */
2256 fprintf (rtl_dump_file, "\n;; Function %s\n\n",
2257 IDENTIFIER_POINTER (DECL_NAME (decl)));
2258 if (DECL_SAVED_INSNS (decl))
2259 fprintf (rtl_dump_file, ";; (integrable)\n\n");
2260 print_rtl (rtl_dump_file, insns);
2261 fflush (rtl_dump_file);
2264 /* If function is inline, and we don't yet know whether to
2265 compile it by itself, defer decision till end of compilation.
2266 finish_compilation will call rest_of_compilation again
2267 for those functions that need to be output. */
2269 if (DECL_INLINE (decl)
2270 && ((! TREE_PUBLIC (decl) && ! TREE_ADDRESSABLE (decl)
2271 && ! flag_keep_inline_functions)
2272 || DECL_EXTERNAL (decl)))
2274 #ifdef DWARF_DEBUGGING_INFO
2275 /* Generate the DWARF info for the "abstract" instance
2276 of a function which we may later generate inlined and/or
2277 out-of-line instances of. */
2278 if (write_symbols == DWARF_DEBUG)
2280 set_decl_abstract_flags (decl, 1);
2281 TIMEVAR (symout_time, dwarfout_file_scope_decl (decl, 0));
2282 set_decl_abstract_flags (decl, 0);
2285 TIMEVAR (integration_time, save_for_inline_nocopy (decl));
2286 goto exit_rest_of_compilation;
2289 /* If we have to compile the function now, save its rtl and subdecls
2290 so that its compilation will not affect what others get. */
2291 if (DECL_INLINE (decl))
2293 #ifdef DWARF_DEBUGGING_INFO
2294 /* Generate the DWARF info for the "abstract" instance of
2295 a function which we will generate an out-of-line instance
2296 of almost immediately (and which we may also later generate
2297 various inlined instances of). */
2298 if (write_symbols == DWARF_DEBUG)
2300 set_decl_abstract_flags (decl, 1);
2301 TIMEVAR (symout_time, dwarfout_file_scope_decl (decl, 0));
2302 set_decl_abstract_flags (decl, 0);
2305 saved_block_tree = DECL_INITIAL (decl);
2306 saved_arguments = DECL_ARGUMENTS (decl);
2307 TIMEVAR (integration_time, save_for_inline_copying (decl));
2311 TREE_ASM_WRITTEN (decl) = 1;
2313 /* Now that integrate will no longer see our rtl, we need not distinguish
2314 between the return value of this function and the return value of called
2316 rtx_equal_function_value_matters = 0;
2318 /* Don't return yet if -Wreturn-type; we need to do jump_optimize. */
2319 if ((rtl_dump_and_exit || flag_syntax_only) && !warn_return_type)
2321 goto exit_rest_of_compilation;
2324 /* From now on, allocate rtl in current_obstack, not in saveable_obstack.
2325 Note that that may have been done above, in save_for_inline_copying.
2326 The call to resume_temporary_allocation near the end of this function
2327 goes back to the usual state of affairs. */
2329 rtl_in_current_obstack ();
2332 /* If we are doing position-independent code generation, now
2333 is the time to output special prologues and epilogues.
2334 We do not want to do this earlier, because it just clutters
2335 up inline functions with meaningless insns. */
2340 insns = get_insns ();
2342 /* Copy any shared structure that should not be shared. */
2344 unshare_all_rtl (insns);
2346 /* Instantiate all virtual registers. */
2348 instantiate_virtual_regs (current_function_decl, get_insns ());
2350 /* See if we have allocated stack slots that are not directly addressable.
2351 If so, scan all the insns and create explicit address computation
2352 for all references to such slots. */
2353 /* fixup_stack_slots (); */
2355 /* Do jump optimization the first time, if -opt.
2356 Also do it if -W, but in that case it doesn't change the rtl code,
2357 it only computes whether control can drop off the end of the function. */
2359 if (optimize > 0 || extra_warnings || warn_return_type
2360 /* If function is `volatile', we should warn if it tries to return. */
2361 || TREE_THIS_VOLATILE (decl))
2363 TIMEVAR (jump_time, reg_scan (insns, max_reg_num (), 0));
2364 TIMEVAR (jump_time, jump_optimize (insns, 0, 0, 1));
2367 /* Now is when we stop if -fsyntax-only and -Wreturn-type. */
2368 if (rtl_dump_and_exit || flag_syntax_only)
2369 goto exit_rest_of_compilation;
2371 /* Dump rtl code after jump, if we are doing that. */
2376 fprintf (jump_opt_dump_file, "\n;; Function %s\n\n",
2377 IDENTIFIER_POINTER (DECL_NAME (decl)));
2378 print_rtl (jump_opt_dump_file, insns);
2379 fflush (jump_opt_dump_file);
2382 /* Perform common subexpression elimination.
2383 Nonzero value from `cse_main' means that jumps were simplified
2384 and some code may now be unreachable, so do
2385 jump optimization again. */
2390 fprintf (cse_dump_file, "\n;; Function %s\n\n",
2391 IDENTIFIER_POINTER (DECL_NAME (decl)));
2396 TIMEVAR (cse_time, reg_scan (insns, max_reg_num (), 1));
2398 if (flag_thread_jumps)
2399 /* Hacks by tiemann & kenner. */
2400 TIMEVAR (jump_time, thread_jumps (insns, max_reg_num (), 0));
2402 TIMEVAR (cse_time, tem = cse_main (insns, max_reg_num (),
2404 TIMEVAR (cse_time, delete_dead_from_cse (insns, max_reg_num ()));
2407 TIMEVAR (jump_time, jump_optimize (insns, 0, 0, 0));
2410 /* Dump rtl code after cse, if we are doing that. */
2415 print_rtl (cse_dump_file, insns);
2416 fflush (cse_dump_file);
2422 fprintf (loop_dump_file, "\n;; Function %s\n\n",
2423 IDENTIFIER_POINTER (DECL_NAME (decl)));
2426 /* Move constant computations out of loops. */
2432 loop_optimize (insns, loop_dump_file);
2436 /* Dump rtl code after loop opt, if we are doing that. */
2441 print_rtl (loop_dump_file, insns);
2442 fflush (loop_dump_file);
2448 fprintf (cse2_dump_file, "\n;; Function %s\n\n",
2449 IDENTIFIER_POINTER (DECL_NAME (decl)));
2452 if (optimize > 0 && flag_rerun_cse_after_loop)
2454 TIMEVAR (cse2_time, reg_scan (insns, max_reg_num (), 0));
2456 TIMEVAR (cse2_time, tem = cse_main (insns, max_reg_num (),
2457 1, cse2_dump_file));
2459 TIMEVAR (jump_time, jump_optimize (insns, 0, 0, 0));
2462 if (optimize > 0 && flag_thread_jumps)
2463 /* This pass of jump threading straightens out code
2464 that was kinked by loop optimization. */
2465 TIMEVAR (jump_time, thread_jumps (insns, max_reg_num (), 0));
2467 /* Dump rtl code after cse, if we are doing that. */
2472 print_rtl (cse2_dump_file, insns);
2473 fflush (cse2_dump_file);
2476 /* We are no longer anticipating cse in this function, at least. */
2478 cse_not_expected = 1;
2480 /* Now we choose between stupid (pcc-like) register allocation
2481 (if we got the -noreg switch and not -opt)
2482 and smart register allocation. */
2484 if (optimize > 0) /* Stupid allocation probably won't work */
2485 obey_regdecls = 0; /* if optimizations being done. */
2489 /* Print function header into flow dump now
2490 because doing the flow analysis makes some of the dump. */
2495 fprintf (flow_dump_file, "\n;; Function %s\n\n",
2496 IDENTIFIER_POINTER (DECL_NAME (decl)));
2503 regclass (insns, max_reg_num ());
2504 stupid_life_analysis (insns, max_reg_num (),
2510 /* Do control and data flow analysis,
2511 and write some of the results to dump file. */
2513 TIMEVAR (flow_time, flow_analysis (insns, max_reg_num (),
2515 if (warn_uninitialized)
2517 uninitialized_vars_warning (DECL_INITIAL (decl));
2518 setjmp_args_warning ();
2522 /* Dump rtl after flow analysis. */
2527 print_rtl (flow_dump_file, insns);
2528 fflush (flow_dump_file);
2531 /* If -opt, try combining insns through substitution. */
2534 TIMEVAR (combine_time, combine_instructions (insns, max_reg_num ()));
2536 /* Dump rtl code after insn combination. */
2541 fprintf (combine_dump_file, "\n;; Function %s\n\n",
2542 IDENTIFIER_POINTER (DECL_NAME (decl)));
2543 dump_combine_stats (combine_dump_file);
2544 print_rtl (combine_dump_file, insns);
2545 fflush (combine_dump_file);
2548 /* Print function header into sched dump now
2549 because doing the sched analysis makes some of the dump. */
2554 fprintf (sched_dump_file, "\n;; Function %s\n\n",
2555 IDENTIFIER_POINTER (DECL_NAME (decl)));
2558 if (optimize > 0 && flag_schedule_insns)
2560 /* Do control and data sched analysis,
2561 and write some of the results to dump file. */
2563 TIMEVAR (sched_time, schedule_insns (sched_dump_file));
2566 /* Dump rtl after instruction scheduling. */
2571 print_rtl (sched_dump_file, insns);
2572 fflush (sched_dump_file);
2575 /* Unless we did stupid register allocation,
2576 allocate pseudo-regs that are used only within 1 basic block. */
2579 TIMEVAR (local_alloc_time,
2581 regclass (insns, max_reg_num ());
2585 /* Dump rtl code after allocating regs within basic blocks. */
2590 fprintf (local_reg_dump_file, "\n;; Function %s\n\n",
2591 IDENTIFIER_POINTER (DECL_NAME (decl)));
2592 dump_flow_info (local_reg_dump_file);
2593 dump_local_alloc (local_reg_dump_file);
2594 print_rtl (local_reg_dump_file, insns);
2595 fflush (local_reg_dump_file);
2598 if (global_reg_dump)
2600 fprintf (global_reg_dump_file, "\n;; Function %s\n\n",
2601 IDENTIFIER_POINTER (DECL_NAME (decl))));
2603 /* Unless we did stupid register allocation,
2604 allocate remaining pseudo-regs, then do the reload pass
2605 fixing up any insns that are invalid. */
2607 TIMEVAR (global_alloc_time,
2610 failure = global_alloc (global_reg_dump_file);
2612 failure = reload (insns, 0, global_reg_dump_file);
2615 if (global_reg_dump)
2618 dump_global_regs (global_reg_dump_file);
2619 print_rtl (global_reg_dump_file, insns);
2620 fflush (global_reg_dump_file);
2624 goto exit_rest_of_compilation;
2626 reload_completed = 1;
2628 /* On some machines, the prologue and epilogue code, or parts thereof,
2629 can be represented as RTL. Doing so lets us schedule insns between
2630 it and the rest of the code and also allows delayed branch
2631 scheduling to operate in the epilogue. */
2633 thread_prologue_and_epilogue_insns (insns);
2635 if (optimize > 0 && flag_schedule_insns_after_reload)
2640 fprintf (sched2_dump_file, "\n;; Function %s\n\n",
2641 IDENTIFIER_POINTER (DECL_NAME (decl)));
2644 /* Do control and data sched analysis again,
2645 and write some more of the results to dump file. */
2647 TIMEVAR (sched2_time, schedule_insns (sched2_dump_file));
2649 /* Dump rtl after post-reorder instruction scheduling. */
2654 print_rtl (sched2_dump_file, insns);
2655 fflush (sched2_dump_file);
2659 #ifdef LEAF_REGISTERS
2661 if (optimize > 0 && only_leaf_regs_used () && leaf_function_p ())
2665 /* One more attempt to remove jumps to .+1
2666 left by dead-store-elimination.
2667 Also do cross-jumping this time
2668 and delete no-op move insns. */
2672 TIMEVAR (jump_time, jump_optimize (insns, 1, 1, 0));
2675 /* Dump rtl code after jump, if we are doing that. */
2680 fprintf (jump2_opt_dump_file, "\n;; Function %s\n\n",
2681 IDENTIFIER_POINTER (DECL_NAME (decl)));
2682 print_rtl (jump2_opt_dump_file, insns);
2683 fflush (jump2_opt_dump_file);
2686 /* If a scheduling pass for delayed branches is to be done,
2687 call the scheduling code. */
2690 if (optimize > 0 && flag_delayed_branch)
2692 TIMEVAR (dbr_sched_time, dbr_schedule (insns, dbr_sched_dump_file));
2697 fprintf (dbr_sched_dump_file, "\n;; Function %s\n\n",
2698 IDENTIFIER_POINTER (DECL_NAME (decl)));
2699 print_rtl (dbr_sched_dump_file, insns);
2700 fflush (dbr_sched_dump_file);
2707 /* Shorten branches. */
2708 TIMEVAR (shorten_branch_time,
2710 shorten_branches (get_insns ());
2714 TIMEVAR (stack_reg_time, reg_to_stack (insns, stack_reg_dump_file));
2719 fprintf (stack_reg_dump_file, "\n;; Function %s\n\n",
2720 IDENTIFIER_POINTER (DECL_NAME (decl)));
2721 print_rtl (stack_reg_dump_file, insns);
2722 fflush (stack_reg_dump_file);
2727 /* Now turn the rtl into assembler code. */
2729 TIMEVAR (final_time,
2734 /* Get the function's name, as described by its RTL.
2735 This may be different from the DECL_NAME name used
2736 in the source file. */
2738 x = DECL_RTL (decl);
2739 if (GET_CODE (x) != MEM)
2742 if (GET_CODE (x) != SYMBOL_REF)
2744 fnname = XSTR (x, 0);
2746 assemble_start_function (decl, fnname);
2747 final_start_function (insns, asm_out_file, optimize);
2748 final (insns, asm_out_file, optimize, 0);
2749 final_end_function (insns, asm_out_file, optimize);
2750 assemble_end_function (decl, fnname);
2751 fflush (asm_out_file);
2754 /* Write DBX symbols if requested */
2756 /* Note that for those inline functions where we don't initially
2757 know for certain that we will be generating an out-of-line copy,
2758 the first invocation of this routine (rest_of_compilation) will
2759 skip over this code by doing a `goto exit_rest_of_compilation;'.
2760 Later on, finish_compilation will call rest_of_compilation again
2761 for those inline functions that need to have out-of-line copies
2762 generated. During that call, we *will* be routed past here. */
2764 #ifdef DBX_DEBUGGING_INFO
2765 if (write_symbols == DBX_DEBUG)
2766 TIMEVAR (symout_time, dbxout_function (decl));
2769 #ifdef DWARF_DEBUGGING_INFO
2770 if (write_symbols == DWARF_DEBUG)
2771 TIMEVAR (symout_time, dwarfout_file_scope_decl (decl, 0));
2774 exit_rest_of_compilation:
2776 /* In case the function was not output,
2777 don't leave any temporary anonymous types
2778 queued up for sdb output. */
2779 #ifdef SDB_DEBUGGING_INFO
2780 if (write_symbols == SDB_DEBUG)
2781 sdbout_types (NULL_TREE);
2784 /* Put back the tree of subblocks and list of arguments
2785 from before we copied them.
2786 Code generation and the output of debugging info may have modified
2787 the copy, but the original is unchanged. */
2789 if (saved_block_tree != 0)
2790 DECL_INITIAL (decl) = saved_block_tree;
2791 if (saved_arguments != 0)
2792 DECL_ARGUMENTS (decl) = saved_arguments;
2794 reload_completed = 0;
2796 /* Clear out the real_constant_chain before some of the rtx's
2797 it runs through become garbage. */
2799 clear_const_double_mem ();
2801 /* Cancel the effect of rtl_in_current_obstack. */
2803 resume_temporary_allocation ();
2805 /* The parsing time is all the time spent in yyparse
2806 *except* what is spent in this function. */
2808 parse_time -= get_run_time () - start_time;
2811 /* Entry point of cc1/c++. Decode command args, then call compile_file.
2812 Exit code is 35 if can't open files, 34 if fatal error,
2813 33 if had nonfatal errors, else success. */
2816 main (argc, argv, envp)
2823 int flag_print_mem = 0;
2824 int version_flag = 0;
2827 /* save in case md file wants to emit args as a comment. */
2831 p = argv[0] + strlen (argv[0]);
2832 while (p != argv[0] && p[-1] != '/') --p;
2836 /* Get rid of any avoidable limit on stack size. */
2840 /* Set the stack limit huge so that alloca does not fail. */
2841 getrlimit (RLIMIT_STACK, &rlim);
2842 rlim.rlim_cur = rlim.rlim_max;
2843 setrlimit (RLIMIT_STACK, &rlim);
2845 #endif /* RLIMIT_STACK */
2847 signal (SIGFPE, float_signal);
2850 signal (SIGPIPE, pipe_closed);
2853 decl_printable_name = decl_name;
2854 lang_expand_expr = (struct rtx_def *(*)()) do_abort;
2856 /* Initialize whether `char' is signed. */
2857 flag_signed_char = DEFAULT_SIGNED_CHAR;
2858 #ifdef DEFAULT_SHORT_ENUMS
2859 /* Initialize how much space enums occupy, by default. */
2860 flag_short_enums = DEFAULT_SHORT_ENUMS;
2863 /* Scan to see what optimization level has been specified. That will
2864 determine the default value of many flags. */
2865 for (i = 1; i < argc; i++)
2867 if (!strcmp (argv[i], "-O"))
2871 else if (argv[i][0] == '-' && argv[i][1] == 'O')
2873 /* Handle -O2, -O3, -O69, ... */
2874 char *p = &argv[i][2];
2878 if (! (c >= '0' && c <= '9'))
2881 optimize = atoi (&argv[i][2]);
2885 obey_regdecls = (optimize == 0);
2895 flag_thread_jumps = 1;
2897 flag_delayed_branch = 1;
2903 flag_cse_follow_jumps = 1;
2904 flag_cse_skip_blocks = 1;
2905 flag_expensive_optimizations = 1;
2906 flag_strength_reduce = 1;
2907 flag_rerun_cse_after_loop = 1;
2908 flag_caller_saves = 1;
2909 #ifdef INSN_SCHEDULING
2910 flag_schedule_insns = 1;
2911 flag_schedule_insns_after_reload = 1;
2915 #ifdef OPTIMIZATION_OPTIONS
2916 /* Allow default optimizations to be specified on a per-machine basis. */
2917 OPTIMIZATION_OPTIONS (optimize);
2920 /* Initialize register usage now so switches may override. */
2924 set_target_switch ("");
2926 for (i = 1; i < argc; i++)
2929 /* If this is a language-specific option,
2930 decode it in a language-specific way. */
2931 for (j = 0; lang_options[j] != 0; j++)
2932 if (!strncmp (argv[i], lang_options[j],
2933 strlen (lang_options[j])))
2935 if (lang_options[j] != 0)
2936 /* If the option is valid for *some* language,
2937 treat it as valid even if this language doesn't understand it. */
2938 lang_decode_option (argv[i]);
2939 else if (argv[i][0] == '-' && argv[i][1] != 0)
2941 register char *str = argv[i] + 1;
2946 set_target_switch (&str[1]);
2947 else if (!strcmp (str, "dumpbase"))
2949 dump_base_name = argv[++i];
2951 else if (str[0] == 'd')
2953 register char *p = &str[1];
2961 global_reg_dump = 1;
2967 cse_dump = 1, cse2_dump = 1;
2985 global_reg_dump = 1;
3003 flag_print_asm_name = 1;
3025 rtl_dump_and_exit = 1;
3029 else if (str[0] == 'f')
3031 register char *p = &str[1];
3034 /* Some kind of -f option.
3035 P's value is the option sans `-f'.
3036 Search for it in the table of options. */
3039 !found && j < sizeof (f_options) / sizeof (f_options[0]);
3042 if (!strcmp (p, f_options[j].string))
3044 *f_options[j].variable = f_options[j].on_value;
3045 /* A goto here would be cleaner,
3046 but breaks the vax pcc. */
3049 if (p[0] == 'n' && p[1] == 'o' && p[2] == '-'
3050 && ! strcmp (p+3, f_options[j].string))
3052 *f_options[j].variable = ! f_options[j].on_value;
3059 else if (!strncmp (p, "fixed-", 6))
3060 fix_register (&p[6], 1, 1);
3061 else if (!strncmp (p, "call-used-", 10))
3062 fix_register (&p[10], 0, 1);
3063 else if (!strncmp (p, "call-saved-", 11))
3064 fix_register (&p[11], 0, 0);
3066 error ("Invalid option `%s'", argv[i]);
3068 else if (str[0] == 'O')
3070 register char *p = str+1;
3071 while (*p && *p >= '0' && *p <= '9')
3076 error ("Invalid option `%s'", argv[i]);
3078 else if (!strcmp (str, "pedantic"))
3080 else if (!strcmp (str, "pedantic-errors"))
3081 flag_pedantic_errors = pedantic = 1;
3082 else if (!strcmp (str, "quiet"))
3084 else if (!strcmp (str, "version"))
3086 else if (!strcmp (str, "w"))
3087 inhibit_warnings = 1;
3088 else if (!strcmp (str, "W"))
3091 warn_uninitialized = 1;
3093 else if (str[0] == 'W')
3095 register char *p = &str[1];
3098 /* Some kind of -W option.
3099 P's value is the option sans `-W'.
3100 Search for it in the table of options. */
3103 !found && j < sizeof (W_options) / sizeof (W_options[0]);
3106 if (!strcmp (p, W_options[j].string))
3108 *W_options[j].variable = W_options[j].on_value;
3109 /* A goto here would be cleaner,
3110 but breaks the vax pcc. */
3113 if (p[0] == 'n' && p[1] == 'o' && p[2] == '-'
3114 && ! strcmp (p+3, W_options[j].string))
3116 *W_options[j].variable = ! W_options[j].on_value;
3123 else if (!strncmp (p, "id-clash-", 9))
3129 if (*endp >= '0' && *endp <= '9')
3133 error ("Invalid option `%s'", argv[i]);
3138 id_clash_len = atoi (str + 10);
3142 error ("Invalid option `%s'", argv[i]);
3144 else if (!strcmp (str, "p"))
3146 else if (!strcmp (str, "a"))
3148 #if !defined (BLOCK_PROFILER) || !defined (FUNCTION_BLOCK_PROFILER)
3149 warning ("`-a' option (basic block profile) not supported");
3151 profile_block_flag = 1;
3154 else if (str[0] == 'g')
3161 while (*p && (*p < '0' || *p > '9'))
3165 while (*q && (*q >= '0' && *q <= '9'))
3170 level = 2; /* default debugging info level */
3171 if (*q || level > 3)
3173 warning ("invalid debug level specification in option: `-%s'",
3175 warning ("no debugging information will be generated");
3179 /* If more than one debugging type is supported,
3180 you must define PREFERRED_DEBUGGING_TYPE
3181 to choose a format in a system-dependent way. */
3182 /* This is one long line cause VAXC can't handle a \-newline. */
3183 #if 1 < (defined (DBX_DEBUGGING_INFO) + defined (SDB_DEBUGGING_INFO) + defined (DWARF_DEBUGGING_INFO) + defined (XCOFF_DEBUGGING_INFO))
3184 #ifdef PREFERRED_DEBUGGING_TYPE
3185 if (!strncmp (str, "ggdb", len))
3186 write_symbols = PREFERRED_DEBUGGING_TYPE;
3187 #else /* no PREFERRED_DEBUGGING_TYPE */
3188 You Lose! You must define PREFERRED_DEBUGGING_TYPE!
3189 #endif /* no PREFERRED_DEBUGGING_TYPE */
3190 #endif /* More than one debugger format enabled. */
3191 #ifdef DBX_DEBUGGING_INFO
3192 if (write_symbols != NO_DEBUG)
3194 else if (!strncmp (str, "ggdb", len))
3195 write_symbols = DBX_DEBUG;
3196 else if (!strncmp (str, "gstabs", len))
3197 write_symbols = DBX_DEBUG;
3198 else if (!strncmp (str, "gstabs+", len))
3199 write_symbols = DBX_DEBUG;
3201 /* Always enable extensions for -ggdb or -gstabs+,
3202 always disable for -gstabs.
3203 For plain -g, use system-specific default. */
3204 if (write_symbols == DBX_DEBUG && !strncmp (str, "ggdb", len)
3206 use_gnu_debug_info_extensions = 1;
3207 else if (write_symbols == DBX_DEBUG && !strncmp (str, "gstabs+", len)
3209 use_gnu_debug_info_extensions = 1;
3210 else if (write_symbols == DBX_DEBUG
3211 && !strncmp (str, "gstabs", len) && len >= 2)
3212 use_gnu_debug_info_extensions = 0;
3214 use_gnu_debug_info_extensions = DEFAULT_GDB_EXTENSIONS;
3215 #endif /* DBX_DEBUGGING_INFO */
3216 #ifdef DWARF_DEBUGGING_INFO
3217 if (write_symbols != NO_DEBUG)
3219 else if (!strncmp (str, "g", len))
3220 write_symbols = DWARF_DEBUG;
3221 else if (!strncmp (str, "ggdb", len))
3222 write_symbols = DWARF_DEBUG;
3223 else if (!strncmp (str, "gdwarf", len))
3224 write_symbols = DWARF_DEBUG;
3226 /* Always enable extensions for -ggdb or -gdwarf+,
3227 always disable for -gdwarf.
3228 For plain -g, use system-specific default. */
3229 if (write_symbols == DWARF_DEBUG && !strncmp (str, "ggdb", len)
3231 use_gnu_debug_info_extensions = 1;
3232 else if (write_symbols == DWARF_DEBUG && !strcmp (str, "gdwarf+"))
3233 use_gnu_debug_info_extensions = 1;
3234 else if (write_symbols == DWARF_DEBUG
3235 && !strncmp (str, "gdwarf", len) && len >= 2)
3236 use_gnu_debug_info_extensions = 0;
3238 use_gnu_debug_info_extensions = DEFAULT_GDB_EXTENSIONS;
3240 #ifdef SDB_DEBUGGING_INFO
3241 if (write_symbols != NO_DEBUG)
3243 else if (!strncmp (str, "g", len))
3244 write_symbols = SDB_DEBUG;
3245 else if (!strncmp (str, "gdb", len))
3246 write_symbols = SDB_DEBUG;
3247 else if (!strncmp (str, "gcoff", len))
3248 write_symbols = SDB_DEBUG;
3249 #endif /* SDB_DEBUGGING_INFO */
3250 #ifdef XCOFF_DEBUGGING_INFO
3251 if (write_symbols != NO_DEBUG)
3253 else if (!strncmp (str, "g", len))
3254 write_symbols = XCOFF_DEBUG;
3255 else if (!strncmp (str, "ggdb", len))
3256 write_symbols = XCOFF_DEBUG;
3257 else if (!strncmp (str, "gxcoff", len))
3258 write_symbols = XCOFF_DEBUG;
3260 /* Always enable extensions for -ggdb or -gxcoff+,
3261 always disable for -gxcoff.
3262 For plain -g, use system-specific default. */
3263 if (write_symbols == XCOFF_DEBUG && !strncmp (str, "ggdb", len)
3265 use_gnu_debug_info_extensions = 1;
3266 else if (write_symbols == XCOFF_DEBUG && !strcmp (str, "gxcoff+"))
3267 use_gnu_debug_info_extensions = 1;
3268 else if (write_symbols == XCOFF_DEBUG
3269 && !strncmp (str, "gxcoff", len) && len >= 2)
3270 use_gnu_debug_info_extensions = 0;
3272 use_gnu_debug_info_extensions = DEFAULT_GDB_EXTENSIONS;
3274 if (write_symbols == NO_DEBUG)
3275 warning ("`-%s' option not supported on this version of GCC", str);
3276 else if (level == 0)
3277 write_symbols = NO_DEBUG;
3279 debug_info_level = (enum debug_info_level) level;
3281 else if (!strcmp (str, "o"))
3283 asm_file_name = argv[++i];
3285 else if (str[0] == 'G')
3287 g_switch_set = TRUE;
3288 g_switch_value = atoi ((str[1] != '\0') ? str+1 : argv[++i]);
3290 else if (!strncmp (str, "aux-info", 8))
3292 flag_gen_aux_info = 1;
3293 aux_info_file_name = (str[8] != '\0' ? str+8 : argv[++i]);
3296 error ("Invalid option `%s'", argv[i]);
3298 else if (argv[i][0] == '+')
3299 error ("Invalid option `%s'", argv[i]);
3306 /* Inlining does not work if not optimizing,
3307 so force it not to be done. */
3311 /* The c_decode_option and lang_decode_option functions set
3312 this to `2' if -Wall is used, so we can avoid giving out
3313 lots of errors for people who don't realize what -Wall does. */
3314 if (warn_uninitialized == 1)
3315 warning ("-Wuninitialized is not supported without -O");
3318 #if defined(DWARF_DEBUGGING_INFO)
3319 if (write_symbols == DWARF_DEBUG
3320 && strcmp (language_string, "GNU C++") == 0)
3322 warning ("-g option not supported for C++ on SVR4 systems");
3323 write_symbols = NO_DEBUG;
3325 #endif /* defined(DWARF_DEBUGGING_INFO) */
3327 #ifdef OVERRIDE_OPTIONS
3328 /* Some machines may reject certain combinations of options. */
3332 /* Unrolling all loops implies that standard loop unrolling must also
3334 if (flag_unroll_all_loops)
3335 flag_unroll_loops = 1;
3336 /* Loop unrolling requires that strength_reduction be on also. Silently
3337 turn on strength reduction here if it isn't already on. Also, the loop
3338 unrolling code assumes that cse will be run after loop, so that must
3339 be turned on also. */
3340 if (flag_unroll_loops)
3342 flag_strength_reduce = 1;
3343 flag_rerun_cse_after_loop = 1;
3346 /* Warn about options that are not supported on this machine. */
3347 #ifndef INSN_SCHEDULING
3348 if (flag_schedule_insns || flag_schedule_insns_after_reload)
3349 warning ("instruction scheduling not supported on this target machine");
3352 if (flag_delayed_branch)
3353 warning ("this target machine does not have delayed branches");
3356 /* If we are in verbose mode, write out the version and maybe all the
3357 option flags in use. */
3360 fprintf (stderr, "%s version %s", language_string, version_string);
3361 #ifdef TARGET_VERSION
3366 #define __VERSION__ "[unknown]"
3368 fprintf (stderr, " compiled by GNU C version %s.\n", __VERSION__);
3370 fprintf (stderr, " compiled by CC.\n");
3373 print_switch_values ();
3376 /* Now that register usage is specified, convert it to HARD_REG_SETs. */
3379 compile_file (filename);
3385 char *lim = (char *) sbrk (0);
3387 fprintf (stderr, "Data size %d.\n",
3388 lim - (char *) &environ);
3392 system ("ps -l 1>&2");
3395 #endif /* not USG */
3397 #endif /* not VMS */
3398 #endif /* not OS2 */
3401 exit (FATAL_EXIT_CODE);
3403 exit (FATAL_EXIT_CODE);
3404 exit (SUCCESS_EXIT_CODE);
3408 /* Decode -m switches. */
3410 /* Here is a table, controlled by the tm.h file, listing each -m switch
3411 and which bits in `target_switches' it should set or clear.
3412 If VALUE is positive, it is bits to set.
3413 If VALUE is negative, -VALUE is bits to clear.
3414 (The sign bit is not used so there is no confusion.) */
3416 struct {char *name; int value;} target_switches []
3419 /* This table is similar, but allows the switch to have a value. */
3421 #ifdef TARGET_OPTIONS
3422 struct {char *prefix; char ** variable;} target_options []
3426 /* Decode the switch -mNAME. */
3429 set_target_switch (name)
3435 for (j = 0; j < sizeof target_switches / sizeof target_switches[0]; j++)
3436 if (!strcmp (target_switches[j].name, name))
3438 if (target_switches[j].value < 0)
3439 target_flags &= ~-target_switches[j].value;
3441 target_flags |= target_switches[j].value;
3445 #ifdef TARGET_OPTIONS
3447 for (j = 0; j < sizeof target_options / sizeof target_options[0]; j++)
3449 int len = strlen (target_options[j].prefix);
3450 if (!strncmp (target_options[j].prefix, name, len))
3452 *target_options[j].variable = name + len;
3459 error ("Invalid option `%s'", name);
3462 /* Variable used for communication between the following two routines. */
3464 static int line_position;
3466 /* Print an option value and adjust the position in the line. */
3469 print_single_switch (type, name)
3472 fprintf (stderr, " %s%s", type, name);
3474 line_position += strlen (type) + strlen (name) + 1;
3476 if (line_position > 65)
3478 fprintf (stderr, "\n\t");
3483 /* Print default target switches for -version. */
3486 print_switch_values ()
3490 fprintf (stderr, "enabled:");
3493 for (j = 0; j < sizeof f_options / sizeof f_options[0]; j++)
3494 if (*f_options[j].variable == f_options[j].on_value)
3495 print_single_switch ("-f", f_options[j].string);
3497 for (j = 0; j < sizeof W_options / sizeof W_options[0]; j++)
3498 if (*W_options[j].variable == W_options[j].on_value)
3499 print_single_switch ("-W", W_options[j].string);
3501 for (j = 0; j < sizeof target_switches / sizeof target_switches[0]; j++)
3502 if (target_switches[j].name[0] != '\0'
3503 && target_switches[j].value > 0
3504 && ((target_switches[j].value & target_flags)
3505 == target_switches[j].value))
3506 print_single_switch ("-m", target_switches[j].name);
3508 fprintf (stderr, "\n");