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, ",");
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 /* dbx on Suns needs to separate gcc_compiled. from first function.
1823 We do not test write_symbols because -g should not alter
1824 the actual code generated. */
1825 #ifdef DBX_DEBUGGING_INFO
1826 /* Don't let the first function fall at the same address
1827 as gcc_compiled., if profiling. */
1828 if (profile_flag || profile_block_flag)
1830 assemble_zeros (UNITS_PER_WORD);
1832 /* If dbx symbol table desired, initialize writing it
1833 and output the predefined types. */
1834 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
1835 if (write_symbols == DBX_DEBUG || write_symbols == XCOFF_DEBUG)
1836 TIMEVAR (symout_time, dbxout_init (asm_out_file, main_input_filename,
1839 #ifdef SDB_DEBUGGING_INFO
1840 if (write_symbols == SDB_DEBUG)
1841 TIMEVAR (symout_time, sdbout_init (asm_out_file, main_input_filename,
1844 #ifdef DWARF_DEBUGGING_INFO
1845 if (write_symbols == DWARF_DEBUG)
1846 TIMEVAR (symout_time, dwarfout_init (asm_out_file, main_input_filename));
1849 /* Initialize yet another pass. */
1851 init_final (main_input_filename);
1853 start_time = get_run_time ();
1855 /* Call the parser, which parses the entire file
1856 (calling rest_of_compilation for each function). */
1858 if (yyparse () != 0)
1859 if (errorcount == 0)
1860 fprintf (stderr, "Errors detected in input file (your bison.simple is out of date)");
1862 /* Compilation is now finished except for writing
1863 what's left of the symbol table output. */
1865 parse_time += get_run_time () - start_time;
1867 parse_time -= integration_time;
1868 parse_time -= varconst_time;
1870 globals = getdecls ();
1872 /* Really define vars that have had only a tentative definition.
1873 Really output inline functions that must actually be callable
1874 and have not been output so far. */
1877 int len = list_length (globals);
1878 tree *vec = (tree *) alloca (sizeof (tree) * len);
1882 /* Process the decls in reverse order--earliest first.
1883 Put them into VEC from back to front, then take out from front. */
1885 for (i = 0, decl = globals; i < len; i++, decl = TREE_CHAIN (decl))
1886 vec[len - i - 1] = decl;
1888 for (i = 0; i < len; i++)
1891 if (TREE_CODE (decl) == VAR_DECL && DECL_SIZE (decl) == 0
1892 && incomplete_decl_finalize_hook != 0)
1893 (*incomplete_decl_finalize_hook) (decl);
1895 if (TREE_CODE (decl) == VAR_DECL && TREE_STATIC (decl)
1896 && ! TREE_ASM_WRITTEN (decl))
1898 /* Don't write out static consts, unless we used them.
1899 (This used to write them out only if the address was
1900 taken, but that was wrong; if the variable was simply
1901 referred to, it still needs to exist or else it will
1902 be undefined in the linker.) */
1903 if (! TREE_READONLY (decl)
1904 || TREE_PUBLIC (decl)
1906 || TREE_ADDRESSABLE (decl)
1907 || TREE_ADDRESSABLE (DECL_ASSEMBLER_NAME (decl)))
1908 rest_of_decl_compilation (decl, NULL_PTR, 1, 1);
1910 /* Cancel the RTL for this decl so that, if debugging info
1911 output for global variables is still to come,
1912 this one will be omitted. */
1913 DECL_RTL (decl) = NULL;
1916 if (TREE_CODE (decl) == FUNCTION_DECL
1917 && ! TREE_ASM_WRITTEN (decl)
1918 && DECL_INITIAL (decl) != 0
1919 && (TREE_ADDRESSABLE (decl)
1920 || TREE_ADDRESSABLE (DECL_ASSEMBLER_NAME (decl)))
1921 && ! DECL_EXTERNAL (decl))
1922 output_inline_function (decl);
1924 /* Warn about any function
1925 declared static but not defined.
1926 We don't warn about variables,
1927 because many programs have static variables
1928 that exist only to get some text into the object file. */
1931 || (DECL_NAME (decl) && TREE_USED (DECL_NAME (decl))))
1932 && TREE_CODE (decl) == FUNCTION_DECL
1933 && DECL_INITIAL (decl) == 0
1934 && DECL_EXTERNAL (decl)
1935 && ! TREE_PUBLIC (decl))
1937 pedwarn_with_decl (decl,
1938 "`%s' declared `static' but never defined");
1939 /* This symbol is effectively an "extern" declaration now. */
1940 TREE_PUBLIC (decl) = 1;
1941 assemble_external (decl);
1944 /* Warn about static fns or vars defined but not used,
1945 but not about inline functions
1946 since unused inline statics is normal practice. */
1948 && (TREE_CODE (decl) == FUNCTION_DECL
1949 || TREE_CODE (decl) == VAR_DECL)
1950 && ! DECL_IN_SYSTEM_HEADER (decl)
1951 && ! DECL_EXTERNAL (decl)
1952 && ! TREE_PUBLIC (decl)
1953 && ! TREE_USED (decl)
1954 && ! DECL_INLINE (decl)
1955 && ! DECL_REGISTER (decl)
1956 /* The TREE_USED bit for file-scope decls
1957 is kept in the identifier, to handle multiple
1958 external decls in different scopes. */
1959 && ! TREE_USED (DECL_NAME (decl)))
1960 warning_with_decl (decl, "`%s' defined but not used");
1962 #ifdef SDB_DEBUGGING_INFO
1963 /* The COFF linker can move initialized global vars to the end.
1964 And that can screw up the symbol ordering.
1965 By putting the symbols in that order to begin with,
1966 we avoid a problem. mcsun!unido!fauern!tumuc!pes@uunet.uu.net. */
1967 if (write_symbols == SDB_DEBUG && TREE_CODE (decl) == VAR_DECL
1968 && TREE_PUBLIC (decl) && DECL_INITIAL (decl)
1969 && DECL_RTL (decl) != 0)
1970 TIMEVAR (symout_time, sdbout_symbol (decl, 0));
1972 /* Output COFF information for non-global
1973 file-scope initialized variables. */
1974 if (write_symbols == SDB_DEBUG
1975 && TREE_CODE (decl) == VAR_DECL
1976 && DECL_INITIAL (decl)
1977 && DECL_RTL (decl) != 0
1978 && GET_CODE (DECL_RTL (decl)) == MEM)
1979 TIMEVAR (symout_time, sdbout_toplevel_data (decl));
1980 #endif /* SDB_DEBUGGING_INFO */
1981 #ifdef DWARF_DEBUGGING_INFO
1982 /* Output DWARF information for file-scope tentative data object
1983 declarations, file-scope (extern) function declarations (which
1984 had no corresponding body) and file-scope tagged type declarations
1985 and definitions which have not yet been forced out. */
1987 if (write_symbols == DWARF_DEBUG
1988 && (TREE_CODE (decl) != FUNCTION_DECL || !DECL_INITIAL (decl)))
1989 TIMEVAR (symout_time, dwarfout_file_scope_decl (decl, 1));
1994 /* Do dbx symbols */
1995 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
1996 if (write_symbols == DBX_DEBUG || write_symbols == XCOFF_DEBUG)
1997 TIMEVAR (symout_time,
1999 dbxout_finish (asm_out_file, main_input_filename);
2003 #ifdef DWARF_DEBUGGING_INFO
2004 if (write_symbols == DWARF_DEBUG)
2005 TIMEVAR (symout_time,
2011 /* Output some stuff at end of file if nec. */
2013 end_final (main_input_filename);
2016 ASM_FILE_END (asm_out_file);
2019 after_finish_compilation:
2021 /* Language-specific end of compilation actions. */
2025 /* Close the dump files. */
2027 if (flag_gen_aux_info)
2029 fclose (aux_info_file);
2031 unlink (aux_info_file_name);
2035 fclose (rtl_dump_file);
2038 fclose (jump_opt_dump_file);
2041 fclose (cse_dump_file);
2044 fclose (loop_dump_file);
2047 fclose (cse2_dump_file);
2050 fclose (flow_dump_file);
2054 dump_combine_total_stats (combine_dump_file);
2055 fclose (combine_dump_file);
2059 fclose (sched_dump_file);
2062 fclose (local_reg_dump_file);
2064 if (global_reg_dump)
2065 fclose (global_reg_dump_file);
2068 fclose (sched2_dump_file);
2071 fclose (jump2_opt_dump_file);
2074 fclose (dbr_sched_dump_file);
2078 fclose (stack_reg_dump_file);
2081 /* Close non-debugging input and output files. Take special care to note
2082 whether fclose returns an error, since the pages might still be on the
2083 buffer chain while the file is open. */
2086 if (ferror (asm_out_file) != 0 || fclose (asm_out_file) != 0)
2087 fatal_io_error (asm_file_name);
2089 /* Print the times. */
2093 fprintf (stderr,"\n");
2094 print_time ("parse", parse_time);
2095 print_time ("integration", integration_time);
2096 print_time ("jump", jump_time);
2097 print_time ("cse", cse_time);
2098 print_time ("loop", loop_time);
2099 print_time ("cse2", cse2_time);
2100 print_time ("flow", flow_time);
2101 print_time ("combine", combine_time);
2102 print_time ("sched", sched_time);
2103 print_time ("local-alloc", local_alloc_time);
2104 print_time ("global-alloc", global_alloc_time);
2105 print_time ("sched2", sched2_time);
2106 print_time ("dbranch", dbr_sched_time);
2107 print_time ("shorten-branch", shorten_branch_time);
2108 print_time ("stack-reg", stack_reg_time);
2109 print_time ("final", final_time);
2110 print_time ("varconst", varconst_time);
2111 print_time ("symout", symout_time);
2112 print_time ("dump", dump_time);
2116 /* This is called from various places for FUNCTION_DECL, VAR_DECL,
2117 and TYPE_DECL nodes.
2119 This does nothing for local (non-static) variables.
2120 Otherwise, it sets up the RTL and outputs any assembler code
2121 (label definition, storage allocation and initialization).
2123 DECL is the declaration. If ASMSPEC is nonzero, it specifies
2124 the assembler symbol name to be used. TOP_LEVEL is nonzero
2125 if this declaration is not within a function. */
2128 rest_of_decl_compilation (decl, asmspec, top_level, at_end)
2134 /* Declarations of variables, and of functions defined elsewhere. */
2136 /* Forward declarations for nested functions are not "external",
2137 but we need to treat them as if they were. */
2138 if (TREE_STATIC (decl) || DECL_EXTERNAL (decl)
2139 || TREE_CODE (decl) == FUNCTION_DECL)
2140 TIMEVAR (varconst_time,
2142 make_decl_rtl (decl, asmspec, top_level);
2143 /* For a user-invisible decl that should be replaced
2144 by its value when used, don't output anything. */
2145 if (! (TREE_CODE (decl) == VAR_DECL
2146 && DECL_IGNORED_P (decl) && TREE_READONLY (decl)
2147 && DECL_INITIAL (decl) != 0))
2148 /* Don't output anything
2149 when a tentative file-scope definition is seen.
2150 But at end of compilation, do output code for them. */
2151 if (! (! at_end && top_level
2152 && (DECL_INITIAL (decl) == 0
2153 || DECL_INITIAL (decl) == error_mark_node
2154 || DECL_IGNORED_P (decl))))
2155 assemble_variable (decl, top_level, at_end);
2157 else if (DECL_REGISTER (decl) && asmspec != 0)
2159 if (decode_reg_name (asmspec) >= 0)
2161 DECL_RTL (decl) = 0;
2162 make_decl_rtl (decl, asmspec, top_level);
2165 error ("invalid register name `%s' for register variable", asmspec);
2167 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
2168 else if ((write_symbols == DBX_DEBUG || write_symbols == XCOFF_DEBUG)
2169 && TREE_CODE (decl) == TYPE_DECL)
2170 TIMEVAR (symout_time, dbxout_symbol (decl, 0));
2172 #ifdef SDB_DEBUGGING_INFO
2173 else if (write_symbols == SDB_DEBUG && top_level
2174 && TREE_CODE (decl) == TYPE_DECL)
2175 TIMEVAR (symout_time, sdbout_symbol (decl, 0));
2179 /* Called after finishing a record, union or enumeral type. */
2182 rest_of_type_compilation (type, toplev)
2186 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
2187 if (write_symbols == DBX_DEBUG || write_symbols == XCOFF_DEBUG)
2188 TIMEVAR (symout_time, dbxout_symbol (TYPE_STUB_DECL (type), !toplev));
2190 #ifdef SDB_DEBUGGING_INFO
2191 if (write_symbols == SDB_DEBUG)
2192 TIMEVAR (symout_time, sdbout_symbol (TYPE_STUB_DECL (type), !toplev));
2196 /* This is called from finish_function (within yyparse)
2197 after each top-level definition is parsed.
2198 It is supposed to compile that function or variable
2199 and output the assembler code for it.
2200 After we return, the tree storage is freed. */
2203 rest_of_compilation (decl)
2207 int start_time = get_run_time ();
2209 /* Nonzero if we have saved the original DECL_INITIAL of the function,
2210 to be restored after we finish compiling the function
2211 (for use when compiling inline calls to this function). */
2212 tree saved_block_tree = 0;
2213 /* Likewise, for DECL_ARGUMENTS. */
2214 tree saved_arguments = 0;
2217 /* If we are reconsidering an inline function
2218 at the end of compilation, skip the stuff for making it inline. */
2220 if (DECL_SAVED_INSNS (decl) == 0)
2222 int specd = DECL_INLINE (decl);
2225 /* If requested, consider whether to make this function inline. */
2226 if (specd || flag_inline_functions)
2227 TIMEVAR (integration_time,
2229 lose = function_cannot_inline_p (decl);
2232 if (warn_inline && specd)
2233 warning_with_decl (decl, lose);
2234 DECL_INLINE (decl) = 0;
2237 DECL_INLINE (decl) = 1;
2240 insns = get_insns ();
2242 /* Dump the rtl code if we are dumping rtl. */
2247 fprintf (rtl_dump_file, "\n;; Function %s\n\n",
2248 IDENTIFIER_POINTER (DECL_NAME (decl)));
2249 if (DECL_SAVED_INSNS (decl))
2250 fprintf (rtl_dump_file, ";; (integrable)\n\n");
2251 print_rtl (rtl_dump_file, insns);
2252 fflush (rtl_dump_file);
2255 /* If function is inline, and we don't yet know whether to
2256 compile it by itself, defer decision till end of compilation.
2257 finish_compilation will call rest_of_compilation again
2258 for those functions that need to be output. */
2260 if (DECL_INLINE (decl)
2261 && ((! TREE_PUBLIC (decl) && ! TREE_ADDRESSABLE (decl)
2262 && ! flag_keep_inline_functions)
2263 || DECL_EXTERNAL (decl)))
2265 #ifdef DWARF_DEBUGGING_INFO
2266 /* Generate the DWARF info for the "abstract" instance
2267 of a function which we may later generate inlined and/or
2268 out-of-line instances of. */
2269 if (write_symbols == DWARF_DEBUG)
2271 set_decl_abstract_flags (decl, 1);
2272 TIMEVAR (symout_time, dwarfout_file_scope_decl (decl, 0));
2273 set_decl_abstract_flags (decl, 0);
2276 TIMEVAR (integration_time, save_for_inline_nocopy (decl));
2277 goto exit_rest_of_compilation;
2280 /* If we have to compile the function now, save its rtl and subdecls
2281 so that its compilation will not affect what others get. */
2282 if (DECL_INLINE (decl))
2284 #ifdef DWARF_DEBUGGING_INFO
2285 /* Generate the DWARF info for the "abstract" instance of
2286 a function which we will generate an out-of-line instance
2287 of almost immediately (and which we may also later generate
2288 various inlined instances of). */
2289 if (write_symbols == DWARF_DEBUG)
2291 set_decl_abstract_flags (decl, 1);
2292 TIMEVAR (symout_time, dwarfout_file_scope_decl (decl, 0));
2293 set_decl_abstract_flags (decl, 0);
2296 saved_block_tree = DECL_INITIAL (decl);
2297 saved_arguments = DECL_ARGUMENTS (decl);
2298 TIMEVAR (integration_time, save_for_inline_copying (decl));
2302 TREE_ASM_WRITTEN (decl) = 1;
2304 /* Now that integrate will no longer see our rtl, we need not distinguish
2305 between the return value of this function and the return value of called
2307 rtx_equal_function_value_matters = 0;
2309 /* Don't return yet if -Wreturn-type; we need to do jump_optimize. */
2310 if ((rtl_dump_and_exit || flag_syntax_only) && !warn_return_type)
2312 goto exit_rest_of_compilation;
2315 /* From now on, allocate rtl in current_obstack, not in saveable_obstack.
2316 Note that that may have been done above, in save_for_inline_copying.
2317 The call to resume_temporary_allocation near the end of this function
2318 goes back to the usual state of affairs. */
2320 rtl_in_current_obstack ();
2323 /* If we are doing position-independent code generation, now
2324 is the time to output special prologues and epilogues.
2325 We do not want to do this earlier, because it just clutters
2326 up inline functions with meaningless insns. */
2331 insns = get_insns ();
2333 /* Copy any shared structure that should not be shared. */
2335 unshare_all_rtl (insns);
2337 /* Instantiate all virtual registers. */
2339 instantiate_virtual_regs (current_function_decl, get_insns ());
2341 /* See if we have allocated stack slots that are not directly addressable.
2342 If so, scan all the insns and create explicit address computation
2343 for all references to such slots. */
2344 /* fixup_stack_slots (); */
2346 /* Do jump optimization the first time, if -opt.
2347 Also do it if -W, but in that case it doesn't change the rtl code,
2348 it only computes whether control can drop off the end of the function. */
2350 if (optimize > 0 || extra_warnings || warn_return_type
2351 /* If function is `volatile', we should warn if it tries to return. */
2352 || TREE_THIS_VOLATILE (decl))
2354 TIMEVAR (jump_time, reg_scan (insns, max_reg_num (), 0));
2355 TIMEVAR (jump_time, jump_optimize (insns, 0, 0, 1));
2358 /* Now is when we stop if -fsyntax-only and -Wreturn-type. */
2359 if (rtl_dump_and_exit || flag_syntax_only)
2360 goto exit_rest_of_compilation;
2362 /* Dump rtl code after jump, if we are doing that. */
2367 fprintf (jump_opt_dump_file, "\n;; Function %s\n\n",
2368 IDENTIFIER_POINTER (DECL_NAME (decl)));
2369 print_rtl (jump_opt_dump_file, insns);
2370 fflush (jump_opt_dump_file);
2373 /* Perform common subexpression elimination.
2374 Nonzero value from `cse_main' means that jumps were simplified
2375 and some code may now be unreachable, so do
2376 jump optimization again. */
2381 fprintf (cse_dump_file, "\n;; Function %s\n\n",
2382 IDENTIFIER_POINTER (DECL_NAME (decl)));
2387 TIMEVAR (cse_time, reg_scan (insns, max_reg_num (), 1));
2389 if (flag_thread_jumps)
2390 /* Hacks by tiemann & kenner. */
2391 TIMEVAR (jump_time, thread_jumps (insns, max_reg_num (), 0));
2393 TIMEVAR (cse_time, tem = cse_main (insns, max_reg_num (),
2395 TIMEVAR (cse_time, delete_dead_from_cse (insns, max_reg_num ()));
2398 TIMEVAR (jump_time, jump_optimize (insns, 0, 0, 0));
2401 /* Dump rtl code after cse, if we are doing that. */
2406 print_rtl (cse_dump_file, insns);
2407 fflush (cse_dump_file);
2413 fprintf (loop_dump_file, "\n;; Function %s\n\n",
2414 IDENTIFIER_POINTER (DECL_NAME (decl)));
2417 /* Move constant computations out of loops. */
2423 loop_optimize (insns, loop_dump_file);
2427 /* Dump rtl code after loop opt, if we are doing that. */
2432 print_rtl (loop_dump_file, insns);
2433 fflush (loop_dump_file);
2439 fprintf (cse2_dump_file, "\n;; Function %s\n\n",
2440 IDENTIFIER_POINTER (DECL_NAME (decl)));
2443 if (optimize > 0 && flag_rerun_cse_after_loop)
2445 TIMEVAR (cse2_time, reg_scan (insns, max_reg_num (), 0));
2447 TIMEVAR (cse2_time, tem = cse_main (insns, max_reg_num (),
2448 1, cse2_dump_file));
2450 TIMEVAR (jump_time, jump_optimize (insns, 0, 0, 0));
2453 if (optimize > 0 && flag_thread_jumps)
2454 /* This pass of jump threading straightens out code
2455 that was kinked by loop optimization. */
2456 TIMEVAR (jump_time, thread_jumps (insns, max_reg_num (), 0));
2458 /* Dump rtl code after cse, if we are doing that. */
2463 print_rtl (cse2_dump_file, insns);
2464 fflush (cse2_dump_file);
2467 /* We are no longer anticipating cse in this function, at least. */
2469 cse_not_expected = 1;
2471 /* Now we choose between stupid (pcc-like) register allocation
2472 (if we got the -noreg switch and not -opt)
2473 and smart register allocation. */
2475 if (optimize > 0) /* Stupid allocation probably won't work */
2476 obey_regdecls = 0; /* if optimizations being done. */
2480 /* Print function header into flow dump now
2481 because doing the flow analysis makes some of the dump. */
2486 fprintf (flow_dump_file, "\n;; Function %s\n\n",
2487 IDENTIFIER_POINTER (DECL_NAME (decl)));
2494 regclass (insns, max_reg_num ());
2495 stupid_life_analysis (insns, max_reg_num (),
2501 /* Do control and data flow analysis,
2502 and write some of the results to dump file. */
2504 TIMEVAR (flow_time, flow_analysis (insns, max_reg_num (),
2506 if (warn_uninitialized)
2508 uninitialized_vars_warning (DECL_INITIAL (decl));
2509 setjmp_args_warning ();
2513 /* Dump rtl after flow analysis. */
2518 print_rtl (flow_dump_file, insns);
2519 fflush (flow_dump_file);
2522 /* If -opt, try combining insns through substitution. */
2525 TIMEVAR (combine_time, combine_instructions (insns, max_reg_num ()));
2527 /* Dump rtl code after insn combination. */
2532 fprintf (combine_dump_file, "\n;; Function %s\n\n",
2533 IDENTIFIER_POINTER (DECL_NAME (decl)));
2534 dump_combine_stats (combine_dump_file);
2535 print_rtl (combine_dump_file, insns);
2536 fflush (combine_dump_file);
2539 /* Print function header into sched dump now
2540 because doing the sched analysis makes some of the dump. */
2545 fprintf (sched_dump_file, "\n;; Function %s\n\n",
2546 IDENTIFIER_POINTER (DECL_NAME (decl)));
2549 if (optimize > 0 && flag_schedule_insns)
2551 /* Do control and data sched analysis,
2552 and write some of the results to dump file. */
2554 TIMEVAR (sched_time, schedule_insns (sched_dump_file));
2557 /* Dump rtl after instruction scheduling. */
2562 print_rtl (sched_dump_file, insns);
2563 fflush (sched_dump_file);
2566 /* Unless we did stupid register allocation,
2567 allocate pseudo-regs that are used only within 1 basic block. */
2570 TIMEVAR (local_alloc_time,
2572 regclass (insns, max_reg_num ());
2576 /* Dump rtl code after allocating regs within basic blocks. */
2581 fprintf (local_reg_dump_file, "\n;; Function %s\n\n",
2582 IDENTIFIER_POINTER (DECL_NAME (decl)));
2583 dump_flow_info (local_reg_dump_file);
2584 dump_local_alloc (local_reg_dump_file);
2585 print_rtl (local_reg_dump_file, insns);
2586 fflush (local_reg_dump_file);
2589 if (global_reg_dump)
2591 fprintf (global_reg_dump_file, "\n;; Function %s\n\n",
2592 IDENTIFIER_POINTER (DECL_NAME (decl))));
2594 /* Unless we did stupid register allocation,
2595 allocate remaining pseudo-regs, then do the reload pass
2596 fixing up any insns that are invalid. */
2598 TIMEVAR (global_alloc_time,
2601 failure = global_alloc (global_reg_dump_file);
2603 failure = reload (insns, 0, global_reg_dump_file);
2606 if (global_reg_dump)
2609 dump_global_regs (global_reg_dump_file);
2610 print_rtl (global_reg_dump_file, insns);
2611 fflush (global_reg_dump_file);
2615 goto exit_rest_of_compilation;
2617 reload_completed = 1;
2619 /* On some machines, the prologue and epilogue code, or parts thereof,
2620 can be represented as RTL. Doing so lets us schedule insns between
2621 it and the rest of the code and also allows delayed branch
2622 scheduling to operate in the epilogue. */
2624 thread_prologue_and_epilogue_insns (insns);
2626 if (optimize > 0 && flag_schedule_insns_after_reload)
2631 fprintf (sched2_dump_file, "\n;; Function %s\n\n",
2632 IDENTIFIER_POINTER (DECL_NAME (decl)));
2635 /* Do control and data sched analysis again,
2636 and write some more of the results to dump file. */
2638 TIMEVAR (sched2_time, schedule_insns (sched2_dump_file));
2640 /* Dump rtl after post-reorder instruction scheduling. */
2645 print_rtl (sched2_dump_file, insns);
2646 fflush (sched2_dump_file);
2650 #ifdef LEAF_REGISTERS
2652 if (optimize > 0 && only_leaf_regs_used () && leaf_function_p ())
2656 /* One more attempt to remove jumps to .+1
2657 left by dead-store-elimination.
2658 Also do cross-jumping this time
2659 and delete no-op move insns. */
2663 TIMEVAR (jump_time, jump_optimize (insns, 1, 1, 0));
2666 /* Dump rtl code after jump, if we are doing that. */
2671 fprintf (jump2_opt_dump_file, "\n;; Function %s\n\n",
2672 IDENTIFIER_POINTER (DECL_NAME (decl)));
2673 print_rtl (jump2_opt_dump_file, insns);
2674 fflush (jump2_opt_dump_file);
2677 /* If a scheduling pass for delayed branches is to be done,
2678 call the scheduling code. */
2681 if (optimize > 0 && flag_delayed_branch)
2683 TIMEVAR (dbr_sched_time, dbr_schedule (insns, dbr_sched_dump_file));
2688 fprintf (dbr_sched_dump_file, "\n;; Function %s\n\n",
2689 IDENTIFIER_POINTER (DECL_NAME (decl)));
2690 print_rtl (dbr_sched_dump_file, insns);
2691 fflush (dbr_sched_dump_file);
2698 /* Shorten branches. */
2699 TIMEVAR (shorten_branch_time,
2701 shorten_branches (get_insns ());
2705 TIMEVAR (stack_reg_time, reg_to_stack (insns, stack_reg_dump_file));
2710 fprintf (stack_reg_dump_file, "\n;; Function %s\n\n",
2711 IDENTIFIER_POINTER (DECL_NAME (decl)));
2712 print_rtl (stack_reg_dump_file, insns);
2713 fflush (stack_reg_dump_file);
2718 /* Now turn the rtl into assembler code. */
2720 TIMEVAR (final_time,
2725 /* Get the function's name, as described by its RTL.
2726 This may be different from the DECL_NAME name used
2727 in the source file. */
2729 x = DECL_RTL (decl);
2730 if (GET_CODE (x) != MEM)
2733 if (GET_CODE (x) != SYMBOL_REF)
2735 fnname = XSTR (x, 0);
2737 assemble_start_function (decl, fnname);
2738 final_start_function (insns, asm_out_file, optimize);
2739 final (insns, asm_out_file, optimize, 0);
2740 final_end_function (insns, asm_out_file, optimize);
2741 assemble_end_function (decl, fnname);
2742 fflush (asm_out_file);
2745 /* Write DBX symbols if requested */
2747 /* Note that for those inline functions where we don't initially
2748 know for certain that we will be generating an out-of-line copy,
2749 the first invocation of this routine (rest_of_compilation) will
2750 skip over this code by doing a `goto exit_rest_of_compilation;'.
2751 Later on, finish_compilation will call rest_of_compilation again
2752 for those inline functions that need to have out-of-line copies
2753 generated. During that call, we *will* be routed past here. */
2755 #ifdef DBX_DEBUGGING_INFO
2756 if (write_symbols == DBX_DEBUG)
2757 TIMEVAR (symout_time, dbxout_function (decl));
2760 #ifdef DWARF_DEBUGGING_INFO
2761 if (write_symbols == DWARF_DEBUG)
2762 TIMEVAR (symout_time, dwarfout_file_scope_decl (decl, 0));
2765 exit_rest_of_compilation:
2767 /* In case the function was not output,
2768 don't leave any temporary anonymous types
2769 queued up for sdb output. */
2770 #ifdef SDB_DEBUGGING_INFO
2771 if (write_symbols == SDB_DEBUG)
2772 sdbout_types (NULL_TREE);
2775 /* Put back the tree of subblocks and list of arguments
2776 from before we copied them.
2777 Code generation and the output of debugging info may have modified
2778 the copy, but the original is unchanged. */
2780 if (saved_block_tree != 0)
2781 DECL_INITIAL (decl) = saved_block_tree;
2782 if (saved_arguments != 0)
2783 DECL_ARGUMENTS (decl) = saved_arguments;
2785 reload_completed = 0;
2787 /* Clear out the real_constant_chain before some of the rtx's
2788 it runs through become garbage. */
2790 clear_const_double_mem ();
2792 /* Cancel the effect of rtl_in_current_obstack. */
2794 resume_temporary_allocation ();
2796 /* The parsing time is all the time spent in yyparse
2797 *except* what is spent in this function. */
2799 parse_time -= get_run_time () - start_time;
2802 /* Entry point of cc1/c++. Decode command args, then call compile_file.
2803 Exit code is 35 if can't open files, 34 if fatal error,
2804 33 if had nonfatal errors, else success. */
2807 main (argc, argv, envp)
2814 int flag_print_mem = 0;
2815 int version_flag = 0;
2818 /* save in case md file wants to emit args as a comment. */
2822 p = argv[0] + strlen (argv[0]);
2823 while (p != argv[0] && p[-1] != '/') --p;
2827 /* Get rid of any avoidable limit on stack size. */
2831 /* Set the stack limit huge so that alloca does not fail. */
2832 getrlimit (RLIMIT_STACK, &rlim);
2833 rlim.rlim_cur = rlim.rlim_max;
2834 setrlimit (RLIMIT_STACK, &rlim);
2836 #endif /* RLIMIT_STACK */
2838 signal (SIGFPE, float_signal);
2841 signal (SIGPIPE, pipe_closed);
2844 decl_printable_name = decl_name;
2845 lang_expand_expr = (struct rtx_def *(*)()) do_abort;
2847 /* Initialize whether `char' is signed. */
2848 flag_signed_char = DEFAULT_SIGNED_CHAR;
2849 #ifdef DEFAULT_SHORT_ENUMS
2850 /* Initialize how much space enums occupy, by default. */
2851 flag_short_enums = DEFAULT_SHORT_ENUMS;
2854 /* Scan to see what optimization level has been specified. That will
2855 determine the default value of many flags. */
2856 for (i = 1; i < argc; i++)
2858 if (!strcmp (argv[i], "-O"))
2862 else if (argv[i][0] == '-' && argv[i][1] == 'O')
2864 /* Handle -O2, -O3, -O69, ... */
2865 char *p = &argv[i][2];
2869 if (! (c >= '0' && c <= '9'))
2872 optimize = atoi (&argv[i][2]);
2876 obey_regdecls = (optimize == 0);
2886 flag_thread_jumps = 1;
2888 flag_delayed_branch = 1;
2894 flag_cse_follow_jumps = 1;
2895 flag_cse_skip_blocks = 1;
2896 flag_expensive_optimizations = 1;
2897 flag_strength_reduce = 1;
2898 flag_rerun_cse_after_loop = 1;
2899 flag_caller_saves = 1;
2900 #ifdef INSN_SCHEDULING
2901 flag_schedule_insns = 1;
2902 flag_schedule_insns_after_reload = 1;
2906 #ifdef OPTIMIZATION_OPTIONS
2907 /* Allow default optimizations to be specified on a per-machine basis. */
2908 OPTIMIZATION_OPTIONS (optimize);
2911 /* Initialize register usage now so switches may override. */
2915 set_target_switch ("");
2917 for (i = 1; i < argc; i++)
2920 /* If this is a language-specific option,
2921 decode it in a language-specific way. */
2922 for (j = 0; lang_options[j] != 0; j++)
2923 if (!strncmp (argv[i], lang_options[j],
2924 strlen (lang_options[j])))
2926 if (lang_options[j] != 0)
2927 /* If the option is valid for *some* language,
2928 treat it as valid even if this language doesn't understand it. */
2929 lang_decode_option (argv[i]);
2930 else if (argv[i][0] == '-' && argv[i][1] != 0)
2932 register char *str = argv[i] + 1;
2937 set_target_switch (&str[1]);
2938 else if (!strcmp (str, "dumpbase"))
2940 dump_base_name = argv[++i];
2942 else if (str[0] == 'd')
2944 register char *p = &str[1];
2952 global_reg_dump = 1;
2958 cse_dump = 1, cse2_dump = 1;
2976 global_reg_dump = 1;
2994 flag_print_asm_name = 1;
3016 rtl_dump_and_exit = 1;
3020 else if (str[0] == 'f')
3022 register char *p = &str[1];
3025 /* Some kind of -f option.
3026 P's value is the option sans `-f'.
3027 Search for it in the table of options. */
3030 !found && j < sizeof (f_options) / sizeof (f_options[0]);
3033 if (!strcmp (p, f_options[j].string))
3035 *f_options[j].variable = f_options[j].on_value;
3036 /* A goto here would be cleaner,
3037 but breaks the vax pcc. */
3040 if (p[0] == 'n' && p[1] == 'o' && p[2] == '-'
3041 && ! strcmp (p+3, f_options[j].string))
3043 *f_options[j].variable = ! f_options[j].on_value;
3050 else if (!strncmp (p, "fixed-", 6))
3051 fix_register (&p[6], 1, 1);
3052 else if (!strncmp (p, "call-used-", 10))
3053 fix_register (&p[10], 0, 1);
3054 else if (!strncmp (p, "call-saved-", 11))
3055 fix_register (&p[11], 0, 0);
3057 error ("Invalid option `%s'", argv[i]);
3059 else if (str[0] == 'O')
3061 register char *p = str+1;
3062 while (*p && *p >= '0' && *p <= '9')
3067 error ("Invalid option `%s'", argv[i]);
3069 else if (!strcmp (str, "pedantic"))
3071 else if (!strcmp (str, "pedantic-errors"))
3072 flag_pedantic_errors = pedantic = 1;
3073 else if (!strcmp (str, "quiet"))
3075 else if (!strcmp (str, "version"))
3077 else if (!strcmp (str, "w"))
3078 inhibit_warnings = 1;
3079 else if (!strcmp (str, "W"))
3082 warn_uninitialized = 1;
3084 else if (str[0] == 'W')
3086 register char *p = &str[1];
3089 /* Some kind of -W option.
3090 P's value is the option sans `-W'.
3091 Search for it in the table of options. */
3094 !found && j < sizeof (W_options) / sizeof (W_options[0]);
3097 if (!strcmp (p, W_options[j].string))
3099 *W_options[j].variable = W_options[j].on_value;
3100 /* A goto here would be cleaner,
3101 but breaks the vax pcc. */
3104 if (p[0] == 'n' && p[1] == 'o' && p[2] == '-'
3105 && ! strcmp (p+3, W_options[j].string))
3107 *W_options[j].variable = ! W_options[j].on_value;
3114 else if (!strncmp (p, "id-clash-", 9))
3120 if (*endp >= '0' && *endp <= '9')
3124 error ("Invalid option `%s'", argv[i]);
3129 id_clash_len = atoi (str + 10);
3133 error ("Invalid option `%s'", argv[i]);
3135 else if (!strcmp (str, "p"))
3137 else if (!strcmp (str, "a"))
3139 #if !defined (BLOCK_PROFILER) || !defined (FUNCTION_BLOCK_PROFILER)
3140 warning ("`-a' option (basic block profile) not supported");
3142 profile_block_flag = 1;
3145 else if (str[0] == 'g')
3152 while (*p && (*p < '0' || *p > '9'))
3156 while (*q && (*q >= '0' && *q <= '9'))
3161 level = 2; /* default debugging info level */
3162 if (*q || level > 3)
3164 warning ("invalid debug level specification in option: `-%s'",
3166 warning ("no debugging information will be generated");
3170 /* If more than one debugging type is supported,
3171 you must define PREFERRED_DEBUGGING_TYPE
3172 to choose a format in a system-dependent way. */
3173 /* This is one long line cause VAXC can't handle a \-newline. */
3174 #if 1 < (defined (DBX_DEBUGGING_INFO) + defined (SDB_DEBUGGING_INFO) + defined (DWARF_DEBUGGING_INFO) + defined (XCOFF_DEBUGGING_INFO))
3175 #ifdef PREFERRED_DEBUGGING_TYPE
3176 if (!strncmp (str, "ggdb", len))
3177 write_symbols = PREFERRED_DEBUGGING_TYPE;
3178 #else /* no PREFERRED_DEBUGGING_TYPE */
3179 You Lose! You must define PREFERRED_DEBUGGING_TYPE!
3180 #endif /* no PREFERRED_DEBUGGING_TYPE */
3181 #endif /* More than one debugger format enabled. */
3182 #ifdef DBX_DEBUGGING_INFO
3183 if (write_symbols != NO_DEBUG)
3185 else if (!strncmp (str, "ggdb", len))
3186 write_symbols = DBX_DEBUG;
3187 else if (!strncmp (str, "gstabs", len))
3188 write_symbols = DBX_DEBUG;
3189 else if (!strncmp (str, "gstabs+", len))
3190 write_symbols = DBX_DEBUG;
3192 /* Always enable extensions for -ggdb or -gstabs+,
3193 always disable for -gstabs.
3194 For plain -g, use system-specific default. */
3195 if (write_symbols == DBX_DEBUG && !strncmp (str, "ggdb", len)
3197 use_gnu_debug_info_extensions = 1;
3198 else if (write_symbols == DBX_DEBUG && !strncmp (str, "gstabs+", len)
3200 use_gnu_debug_info_extensions = 1;
3201 else if (write_symbols == DBX_DEBUG
3202 && !strncmp (str, "gstabs", len) && len >= 2)
3203 use_gnu_debug_info_extensions = 0;
3205 use_gnu_debug_info_extensions = DEFAULT_GDB_EXTENSIONS;
3206 #endif /* DBX_DEBUGGING_INFO */
3207 #ifdef DWARF_DEBUGGING_INFO
3208 if (write_symbols != NO_DEBUG)
3210 else if (!strncmp (str, "g", len))
3211 write_symbols = DWARF_DEBUG;
3212 else if (!strncmp (str, "ggdb", len))
3213 write_symbols = DWARF_DEBUG;
3214 else if (!strncmp (str, "gdwarf", len))
3215 write_symbols = DWARF_DEBUG;
3217 /* Always enable extensions for -ggdb or -gdwarf+,
3218 always disable for -gdwarf.
3219 For plain -g, use system-specific default. */
3220 if (write_symbols == DWARF_DEBUG && !strncmp (str, "ggdb", len)
3222 use_gnu_debug_info_extensions = 1;
3223 else if (write_symbols == DWARF_DEBUG && !strcmp (str, "gdwarf+"))
3224 use_gnu_debug_info_extensions = 1;
3225 else if (write_symbols == DWARF_DEBUG
3226 && !strncmp (str, "gdwarf", len) && len >= 2)
3227 use_gnu_debug_info_extensions = 0;
3229 use_gnu_debug_info_extensions = DEFAULT_GDB_EXTENSIONS;
3231 #ifdef SDB_DEBUGGING_INFO
3232 if (write_symbols != NO_DEBUG)
3234 else if (!strncmp (str, "g", len))
3235 write_symbols = SDB_DEBUG;
3236 else if (!strncmp (str, "gdb", len))
3237 write_symbols = SDB_DEBUG;
3238 else if (!strncmp (str, "gcoff", len))
3239 write_symbols = SDB_DEBUG;
3240 #endif /* SDB_DEBUGGING_INFO */
3241 #ifdef XCOFF_DEBUGGING_INFO
3242 if (write_symbols != NO_DEBUG)
3244 else if (!strncmp (str, "g", len))
3245 write_symbols = XCOFF_DEBUG;
3246 else if (!strncmp (str, "ggdb", len))
3247 write_symbols = XCOFF_DEBUG;
3248 else if (!strncmp (str, "gxcoff", len))
3249 write_symbols = XCOFF_DEBUG;
3251 /* Always enable extensions for -ggdb or -gxcoff+,
3252 always disable for -gxcoff.
3253 For plain -g, use system-specific default. */
3254 if (write_symbols == XCOFF_DEBUG && !strncmp (str, "ggdb", len)
3256 use_gnu_debug_info_extensions = 1;
3257 else if (write_symbols == XCOFF_DEBUG && !strcmp (str, "gxcoff+"))
3258 use_gnu_debug_info_extensions = 1;
3259 else if (write_symbols == XCOFF_DEBUG
3260 && !strncmp (str, "gxcoff", len) && len >= 2)
3261 use_gnu_debug_info_extensions = 0;
3263 use_gnu_debug_info_extensions = DEFAULT_GDB_EXTENSIONS;
3265 if (write_symbols == NO_DEBUG)
3266 warning ("`-%s' option not supported on this version of GCC", str);
3267 else if (level == 0)
3268 write_symbols = NO_DEBUG;
3270 debug_info_level = (enum debug_info_level) level;
3272 else if (!strcmp (str, "o"))
3274 asm_file_name = argv[++i];
3276 else if (str[0] == 'G')
3278 g_switch_set = TRUE;
3279 g_switch_value = atoi ((str[1] != '\0') ? str+1 : argv[++i]);
3281 else if (!strncmp (str, "aux-info", 8))
3283 flag_gen_aux_info = 1;
3284 aux_info_file_name = (str[8] != '\0' ? str+8 : argv[++i]);
3287 error ("Invalid option `%s'", argv[i]);
3289 else if (argv[i][0] == '+')
3290 error ("Invalid option `%s'", argv[i]);
3297 /* Inlining does not work if not optimizing,
3298 so force it not to be done. */
3302 /* The c_decode_option and lang_decode_option functions set
3303 this to `2' if -Wall is used, so we can avoid giving out
3304 lots of errors for people who don't realize what -Wall does. */
3305 if (warn_uninitialized == 1)
3306 warning ("-Wuninitialized is not supported without -O");
3309 #if defined(DWARF_DEBUGGING_INFO)
3310 if (write_symbols == DWARF_DEBUG
3311 && strcmp (language_string, "GNU C++") == 0)
3313 warning ("-g option not supported for C++ on SVR4 systems");
3314 write_symbols = NO_DEBUG;
3316 #endif /* defined(DWARF_DEBUGGING_INFO) */
3318 #ifdef OVERRIDE_OPTIONS
3319 /* Some machines may reject certain combinations of options. */
3323 /* Unrolling all loops implies that standard loop unrolling must also
3325 if (flag_unroll_all_loops)
3326 flag_unroll_loops = 1;
3327 /* Loop unrolling requires that strength_reduction be on also. Silently
3328 turn on strength reduction here if it isn't already on. Also, the loop
3329 unrolling code assumes that cse will be run after loop, so that must
3330 be turned on also. */
3331 if (flag_unroll_loops)
3333 flag_strength_reduce = 1;
3334 flag_rerun_cse_after_loop = 1;
3337 /* Warn about options that are not supported on this machine. */
3338 #ifndef INSN_SCHEDULING
3339 if (flag_schedule_insns || flag_schedule_insns_after_reload)
3340 warning ("instruction scheduling not supported on this target machine");
3343 if (flag_delayed_branch)
3344 warning ("this target machine does not have delayed branches");
3347 /* If we are in verbose mode, write out the version and maybe all the
3348 option flags in use. */
3351 fprintf (stderr, "%s version %s", language_string, version_string);
3352 #ifdef TARGET_VERSION
3357 #define __VERSION__ "[unknown]"
3359 fprintf (stderr, " compiled by GNU C version %s.\n", __VERSION__);
3361 fprintf (stderr, " compiled by CC.\n");
3364 print_switch_values ();
3367 /* Now that register usage is specified, convert it to HARD_REG_SETs. */
3370 compile_file (filename);
3376 char *lim = (char *) sbrk (0);
3378 fprintf (stderr, "Data size %d.\n",
3379 lim - (char *) &environ);
3383 system ("ps -l 1>&2");
3386 #endif /* not USG */
3388 #endif /* not VMS */
3389 #endif /* not OS2 */
3392 exit (FATAL_EXIT_CODE);
3394 exit (FATAL_EXIT_CODE);
3395 exit (SUCCESS_EXIT_CODE);
3399 /* Decode -m switches. */
3401 /* Here is a table, controlled by the tm.h file, listing each -m switch
3402 and which bits in `target_switches' it should set or clear.
3403 If VALUE is positive, it is bits to set.
3404 If VALUE is negative, -VALUE is bits to clear.
3405 (The sign bit is not used so there is no confusion.) */
3407 struct {char *name; int value;} target_switches []
3410 /* This table is similar, but allows the switch to have a value. */
3412 #ifdef TARGET_OPTIONS
3413 struct {char *prefix; char ** variable;} target_options []
3417 /* Decode the switch -mNAME. */
3420 set_target_switch (name)
3426 for (j = 0; j < sizeof target_switches / sizeof target_switches[0]; j++)
3427 if (!strcmp (target_switches[j].name, name))
3429 if (target_switches[j].value < 0)
3430 target_flags &= ~-target_switches[j].value;
3432 target_flags |= target_switches[j].value;
3436 #ifdef TARGET_OPTIONS
3438 for (j = 0; j < sizeof target_options / sizeof target_options[0]; j++)
3440 int len = strlen (target_options[j].prefix);
3441 if (!strncmp (target_options[j].prefix, name, len))
3443 *target_options[j].variable = name + len;
3450 error ("Invalid option `%s'", name);
3453 /* Variable used for communication between the following two routines. */
3455 static int line_position;
3457 /* Print an option value and adjust the position in the line. */
3460 print_single_switch (type, name)
3463 fprintf (stderr, " %s%s", type, name);
3465 line_position += strlen (type) + strlen (name) + 1;
3467 if (line_position > 65)
3469 fprintf (stderr, "\n\t");
3474 /* Print default target switches for -version. */
3477 print_switch_values ()
3481 fprintf (stderr, "enabled:");
3484 for (j = 0; j < sizeof f_options / sizeof f_options[0]; j++)
3485 if (*f_options[j].variable == f_options[j].on_value)
3486 print_single_switch ("-f", f_options[j].string);
3488 for (j = 0; j < sizeof W_options / sizeof W_options[0]; j++)
3489 if (*W_options[j].variable == W_options[j].on_value)
3490 print_single_switch ("-W", W_options[j].string);
3492 for (j = 0; j < sizeof target_switches / sizeof target_switches[0]; j++)
3493 if (target_switches[j].name[0] != '\0'
3494 && target_switches[j].value > 0
3495 && ((target_switches[j].value & target_flags)
3496 == target_switches[j].value))
3497 print_single_switch ("-m", target_switches[j].name);
3499 fprintf (stderr, "\n");