1 /* Top level of GNU C compiler
2 Copyright (C) 1987, 1988, 1989, 1992 Free Software Foundation, Inc.
4 This file is part of GNU CC.
6 GNU CC is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2, or (at your option)
11 GNU CC is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with GNU CC; see the file COPYING. If not, write to
18 the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
21 /* This is the top level of cc1/c++.
22 It parses command args, opens files, invokes the various passes
23 in the proper order, and counts the time used by each.
24 Error messages and low-level interface to malloc also handled here. */
27 #include <sys/types.h>
36 #include <sys/param.h>
37 /* This is for hpux. It is a real screw. They should change hpux. */
39 #include <sys/times.h>
40 #include <time.h> /* Correct for hpux at least. Is it good on other USG? */
41 #undef FFS /* Some systems define this in param.h. */
45 #include <sys/resource.h>
51 /* #include "c-tree.h" */
54 #include "insn-attr.h"
56 #ifdef XCOFF_DEBUGGING_INFO
61 /* The extra parameters substantially improve the I/O performance. */
63 VMS_fopen (fname, type)
67 if (strcmp (type, "w") == 0)
68 return fopen (fname, type, "mbc=16", "deq=64", "fop=tef", "shr=nil");
69 return fopen (fname, type, "mbc=16");
71 #define fopen VMS_fopen
74 #ifndef DEFAULT_GDB_EXTENSIONS
75 #define DEFAULT_GDB_EXTENSIONS 1
78 extern int rtx_equal_function_value_matters;
80 #if ! (defined (VMS) || defined (OS2))
81 extern char **environ;
83 extern char *version_string, *language_string;
85 extern void init_lex ();
86 extern void init_decl_processing ();
87 extern void init_obstacks ();
88 extern void init_tree_codes ();
89 extern void init_rtl ();
90 extern void init_optabs ();
91 extern void init_stmt ();
92 extern void init_reg_sets ();
93 extern void dump_flow_info ();
94 extern void dump_sched_info ();
95 extern void dump_local_alloc ();
97 void rest_of_decl_compilation ();
99 void error_with_file_and_line ();
104 void set_target_switch ();
105 static void print_switch_values ();
106 static char *decl_name ();
108 /* Name of program invoked, sans directories. */
112 /* Copy of arguments to main. */
116 /* Name of current original source file (what was input to cpp).
117 This comes from each #-command in the actual input. */
119 char *input_filename;
121 /* Name of top-level original source file (what was input to cpp).
122 This comes from the #-command at the beginning of the actual input.
123 If there isn't any there, then this is the cc1 input file name. */
125 char *main_input_filename;
127 /* Stream for reading from the input file. */
131 /* Current line number in real source file. */
135 /* Stack of currently pending input files. */
137 struct file_stack *input_file_stack;
139 /* Incremented on each change to input_file_stack. */
140 int input_file_stack_tick;
142 /* FUNCTION_DECL for function now being parsed or compiled. */
144 extern tree current_function_decl;
146 /* Name to use as base of names for dump output files. */
148 char *dump_base_name;
150 /* Bit flags that specify the machine subtype we are compiling for.
151 Bits are tested using macros TARGET_... defined in the tm.h file
152 and set by `-m...' switches. Must be defined in rtlanal.c. */
154 extern int target_flags;
156 /* Flags saying which kinds of debugging dump have been requested. */
159 int rtl_dump_and_exit = 0;
160 int jump_opt_dump = 0;
165 int combine_dump = 0;
167 int local_reg_dump = 0;
168 int global_reg_dump = 0;
170 int jump2_opt_dump = 0;
171 int dbr_sched_dump = 0;
172 int flag_print_asm_name = 0;
173 int stack_reg_dump = 0;
175 /* Name for output file of assembly code, specified with -o. */
179 /* Value of the -G xx switch, and whether it was passed or not. */
183 /* Type(s) of debugging information we are producing (if any).
184 See flags.h for the definitions of the different possible
185 types of debugging information. */
186 enum debug_info_type write_symbols = NO_DEBUG;
188 /* Level of debugging information we are producing. See flags.h
189 for the definitions of the different possible levels. */
190 enum debug_info_level debug_info_level = DINFO_LEVEL_NONE;
192 /* Nonzero means use GNU-only extensions in the generated symbolic
193 debugging information. */
194 /* Currently, this only has an effect when write_symbols is set to
195 DBX_DEBUG, XCOFF_DEBUG, or DWARF_DEBUG. */
196 int use_gnu_debug_info_extensions = 0;
198 /* Nonzero means do optimizations. -O.
199 Particular numeric values stand for particular amounts of optimization;
200 thus, -O2 stores 2 here. However, the optimizations beyond the basic
201 ones are not controlled directly by this variable. Instead, they are
202 controlled by individual `flag_...' variables that are defaulted
203 based on this variable. */
207 /* Number of error messages and warning messages so far. */
210 int warningcount = 0;
213 /* Pointer to function to compute the name to use to print a declaration. */
215 char *(*decl_printable_name) ();
217 /* Pointer to function to compute rtl for a language-specific tree code. */
219 struct rtx_def *(*lang_expand_expr) ();
221 /* Nonzero if generating code to do profiling. */
223 int profile_flag = 0;
225 /* Nonzero if generating code to do profiling on a line-by-line basis. */
227 int profile_block_flag;
229 /* Nonzero for -pedantic switch: warn about anything
230 that standard spec forbids. */
234 /* Temporarily suppress certain warnings.
235 This is set while reading code from a system header file. */
237 int in_system_header = 0;
239 /* Nonzero means do stupid register allocation.
240 Currently, this is 1 if `optimize' is 0. */
242 int obey_regdecls = 0;
244 /* Don't print functions as they are compiled and don't print
245 times taken by the various passes. -quiet. */
251 /* Nonzero means `char' should be signed. */
253 int flag_signed_char;
255 /* Nonzero means give an enum type only as many bytes as it needs. */
257 int flag_short_enums;
259 /* Nonzero for -fcaller-saves: allocate values in regs that need to
260 be saved across function calls, if that produces overall better code.
261 Optional now, so people can test it. */
263 #ifdef DEFAULT_CALLER_SAVES
264 int flag_caller_saves = 1;
266 int flag_caller_saves = 0;
269 /* Nonzero for -fpcc-struct-return: return values the same way PCC does. */
271 int flag_pcc_struct_return = 0;
273 /* Nonzero for -fforce-mem: load memory value into a register
274 before arithmetic on it. This makes better cse but slower compilation. */
276 int flag_force_mem = 0;
278 /* Nonzero for -fforce-addr: load memory address into a register before
279 reference to memory. This makes better cse but slower compilation. */
281 int flag_force_addr = 0;
283 /* Nonzero for -fdefer-pop: don't pop args after each function call;
284 instead save them up to pop many calls' args with one insns. */
286 int flag_defer_pop = 1;
288 /* Nonzero for -ffloat-store: don't allocate floats and doubles
289 in extended-precision registers. */
291 int flag_float_store = 0;
293 /* Nonzero for -fcse-follow-jumps:
294 have cse follow jumps to do a more extensive job. */
296 int flag_cse_follow_jumps;
298 /* Nonzero for -fcse-skip-blocks:
299 have cse follow a branch around a block. */
300 int flag_cse_skip_blocks;
302 /* Nonzero for -fexpensive-optimizations:
303 perform miscellaneous relatively-expensive optimizations. */
304 int flag_expensive_optimizations;
306 /* Nonzero for -fthread-jumps:
307 have jump optimize output of loop. */
309 int flag_thread_jumps;
311 /* Nonzero enables strength-reduction in loop.c. */
313 int flag_strength_reduce = 0;
315 /* Nonzero enables loop unrolling in unroll.c. Only loops for which the
316 number of iterations can be calculated at compile-time (UNROLL_COMPLETELY,
317 UNROLL_MODULO) or at run-time (preconditioned to be UNROLL_MODULO) are
320 int flag_unroll_loops;
322 /* Nonzero enables loop unrolling in unroll.c. All loops are unrolled.
323 This is generally not a win. */
325 int flag_unroll_all_loops;
327 /* Nonzero for -fwritable-strings:
328 store string constants in data segment and don't uniquize them. */
330 int flag_writable_strings = 0;
332 /* Nonzero means don't put addresses of constant functions in registers.
333 Used for compiling the Unix kernel, where strange substitutions are
334 done on the assembly output. */
336 int flag_no_function_cse = 0;
338 /* Nonzero for -fomit-frame-pointer:
339 don't make a frame pointer in simple functions that don't require one. */
341 int flag_omit_frame_pointer = 0;
343 /* Nonzero to inhibit use of define_optimization peephole opts. */
345 int flag_no_peephole = 0;
347 /* Nonzero allows GCC to violate some IEEE or ANSI rules regarding math
348 operations in the interest of optimization. For example it allows
349 GCC to assume arguments to sqrt are nonnegative numbers, allowing
350 faster code for sqrt to be generated. */
352 int flag_fast_math = 0;
354 /* Nonzero means all references through pointers are volatile. */
358 /* Nonzero means just do syntax checking; don't output anything. */
360 int flag_syntax_only = 0;
362 /* Nonzero means to rerun cse after loop optimization. This increases
363 compilation time about 20% and picks up a few more common expressions. */
365 static int flag_rerun_cse_after_loop;
367 /* Nonzero for -finline-functions: ok to inline functions that look like
368 good inline candidates. */
370 int flag_inline_functions;
372 /* Nonzero for -fkeep-inline-functions: even if we make a function
373 go inline everywhere, keep its defintion around for debugging
376 int flag_keep_inline_functions;
378 /* Nonzero means that functions declared `inline' will be treated
379 as `static'. Prevents generation of zillions of copies of unused
380 static inline functions; instead, `inlines' are written out
381 only when actually used. Used in conjunction with -g. Also
382 does the right thing with #pragma interface. */
386 /* Nonzero means we should be saving declaration info into a .X file. */
388 int flag_gen_aux_info = 0;
390 /* Specified name of aux-info file. */
392 static char *aux_info_file_name;
394 /* Nonzero means make the text shared if supported. */
396 int flag_shared_data;
398 /* Nonzero means schedule into delayed branch slots if supported. */
400 int flag_delayed_branch;
402 /* Nonzero if we are compiling pure (sharable) code.
403 Value is 1 if we are doing reasonable (i.e. simple
404 offset into offset table) pic. Value is 2 if we can
405 only perform register offsets. */
409 /* Nonzero means place uninitialized global data in the bss section. */
413 /* Nonzero means pretend it is OK to examine bits of target floats,
414 even if that isn't true. The resulting code will have incorrect constants,
415 but the same series of instructions that the native compiler would make. */
417 int flag_pretend_float;
419 /* Nonzero means change certain warnings into errors.
420 Usually these are warnings about failure to conform to some standard. */
422 int flag_pedantic_errors = 0;
424 /* flag_schedule_insns means schedule insns within basic blocks (before
426 flag_schedule_insns_after_reload means schedule insns after
429 int flag_schedule_insns = 0;
430 int flag_schedule_insns_after_reload = 0;
432 /* -finhibit-size-directive inhibits output of .size for ELF.
433 This is used only for compiling crtstuff.c,
434 and it may be extended to other effects
435 needed for crtstuff.c on other systems. */
436 int flag_inhibit_size_directive = 0;
438 /* -fverbose-asm causes extra commentary information to be produced in
439 the generated assembly code (to make it more readable). This option
440 is generally only of use to those who actually need to read the
441 generated assembly code (perhaps while debugging the compiler itself). */
443 int flag_verbose_asm = 0;
445 /* -fgnu-linker specifies use of the GNU linker for initializations.
446 (Or, more generally, a linker that handles initializations.)
447 -fno-gnu-linker says that collect2 will be used. */
449 int flag_gnu_linker = 0;
451 int flag_gnu_linker = 1;
454 /* Table of language-independent -f options.
455 STRING is the option name. VARIABLE is the address of the variable.
456 ON_VALUE is the value to store in VARIABLE
457 if `-fSTRING' is seen as an option.
458 (If `-fno-STRING' is seen as an option, the opposite value is stored.) */
460 struct { char *string; int *variable; int on_value;} f_options[] =
462 {"float-store", &flag_float_store, 1},
463 {"volatile", &flag_volatile, 1},
464 {"defer-pop", &flag_defer_pop, 1},
465 {"omit-frame-pointer", &flag_omit_frame_pointer, 1},
466 {"cse-follow-jumps", &flag_cse_follow_jumps, 1},
467 {"cse-skip-blocks", &flag_cse_skip_blocks, 1},
468 {"expensive-optimizations", &flag_expensive_optimizations, 1},
469 {"thread-jumps", &flag_thread_jumps, 1},
470 {"strength-reduce", &flag_strength_reduce, 1},
471 {"unroll-loops", &flag_unroll_loops, 1},
472 {"unroll-all-loops", &flag_unroll_all_loops, 1},
473 {"writable-strings", &flag_writable_strings, 1},
474 {"peephole", &flag_no_peephole, 0},
475 {"force-mem", &flag_force_mem, 1},
476 {"force-addr", &flag_force_addr, 1},
477 {"function-cse", &flag_no_function_cse, 0},
478 {"inline-functions", &flag_inline_functions, 1},
479 {"keep-inline-functions", &flag_keep_inline_functions, 1},
480 {"inline", &flag_no_inline, 0},
481 {"syntax-only", &flag_syntax_only, 1},
482 {"shared-data", &flag_shared_data, 1},
483 {"caller-saves", &flag_caller_saves, 1},
484 {"pcc-struct-return", &flag_pcc_struct_return, 1},
485 {"delayed-branch", &flag_delayed_branch, 1},
486 {"rerun-cse-after-loop", &flag_rerun_cse_after_loop, 1},
487 {"pretend-float", &flag_pretend_float, 1},
488 {"schedule-insns", &flag_schedule_insns, 1},
489 {"schedule-insns2", &flag_schedule_insns_after_reload, 1},
490 {"pic", &flag_pic, 1},
491 {"PIC", &flag_pic, 2},
492 {"fast-math", &flag_fast_math, 1},
493 {"common", &flag_no_common, 0},
494 {"inhibit-size-directive", &flag_inhibit_size_directive, 1},
495 {"verbose-asm", &flag_verbose_asm, 1},
496 {"gnu-linker", &flag_gnu_linker, 1}
499 /* Table of language-specific options. */
501 char *lang_options[] =
510 "-fno-unsigned-char",
511 "-fsigned-bitfields",
512 "-funsigned-bitfields",
513 "-fno-signed-bitfields",
514 "-fno-unsigned-bitfields",
518 "-fno-cond-mismatch",
531 "-Wno-write-strings",
535 "-Wno-pointer-arith",
536 "-Wstrict-prototypes",
537 "-Wno-strict-prototypes",
538 "-Wmissing-prototypes",
539 "-Wno-missing-prototypes",
541 "-Wno-redundant-decls",
543 "-Wno-nested-externs",
549 "-Wno-char-subscripts",
564 /* These are for C++. */
569 "-fno-save-memoized",
580 "-fthis-is-variable",
581 "-fno-this-is-variable",
582 "-fstrict-prototype",
583 "-fno-strict-prototype",
587 "-fno-memoize-lookups",
588 "-felide-constructors",
589 "-fno-elide-constructors",
592 "-fhandle-exceptions",
593 "-fno-handle-exceptions",
595 "-fno-ansi-exceptions",
596 "-fspring-exceptions",
597 "-fno-spring-exceptions",
599 "-fno-default-inline",
601 "-fno-enum-int-equiv",
607 "-fno-nonnull-objects",
611 "-Woverloaded-virtual",
612 "-Wno-overloaded-virtual",
616 /* these are for obj c */
624 /* Options controlling warnings */
626 /* Don't print warning messages. -w. */
628 int inhibit_warnings = 0;
630 /* Print various extra warnings. -W. */
632 int extra_warnings = 0;
634 /* Treat warnings as errors. -Werror. */
636 int warnings_are_errors = 0;
638 /* Nonzero to warn about unused local variables. */
642 /* Nonzero to warn about variables used before they are initialized. */
644 int warn_uninitialized;
646 /* Nonzero means warn about all declarations which shadow others. */
650 /* Warn if a switch on an enum fails to have a case for every enum value. */
654 /* Nonzero means warn about function definitions that default the return type
655 or that use a null return and have a return-type other than void. */
657 int warn_return_type;
659 /* Nonzero means warn about pointer casts that increase the required
660 alignment of the target type (and might therefore lead to a crash
661 due to a misaligned access). */
665 /* Nonzero means warn about any identifiers that match in the first N
666 characters. The value N is in `id_clash_len'. */
671 /* Nonzero means warn if inline function is too large. */
675 /* Warn if a function returns an aggregate,
676 since there are often incompatible calling conventions for doing this. */
678 int warn_aggregate_return;
680 /* Likewise for -W. */
682 struct { char *string; int *variable; int on_value;} W_options[] =
684 {"unused", &warn_unused, 1},
685 {"error", &warnings_are_errors, 1},
686 {"shadow", &warn_shadow, 1},
687 {"switch", &warn_switch, 1},
688 {"return-type", &warn_return_type, 1},
689 {"aggregate-return", &warn_aggregate_return, 1},
690 {"cast-align", &warn_cast_align, 1},
691 {"uninitialized", &warn_uninitialized, 1},
692 {"inline", &warn_inline, 1}
695 /* Output files for assembler code (real compiler output)
696 and debugging dumps. */
701 FILE *jump_opt_dump_file;
703 FILE *loop_dump_file;
704 FILE *cse2_dump_file;
705 FILE *flow_dump_file;
706 FILE *combine_dump_file;
707 FILE *sched_dump_file;
708 FILE *local_reg_dump_file;
709 FILE *global_reg_dump_file;
710 FILE *sched2_dump_file;
711 FILE *jump2_opt_dump_file;
712 FILE *dbr_sched_dump_file;
713 FILE *stack_reg_dump_file;
715 /* Time accumulators, to count the total time spent in various passes. */
719 int integration_time;
727 int local_alloc_time;
728 int global_alloc_time;
731 int shorten_branch_time;
737 /* Return time used so far, in microseconds. */
746 struct rusage rusage;
751 int proc_system_time;
753 int child_system_time;
763 return (tms.tms_utime + tms.tms_stime) * (1000000 / HZ);
766 getrusage (0, &rusage);
767 return (rusage.ru_utime.tv_sec * 1000000 + rusage.ru_utime.tv_usec
768 + rusage.ru_stime.tv_sec * 1000000 + rusage.ru_stime.tv_usec);
771 return (vms_times.proc_user_time + vms_times.proc_system_time) * 10000;
776 #define TIMEVAR(VAR, BODY) \
777 do { int otime = get_run_time (); BODY; VAR += get_run_time () - otime; } while (0)
780 print_time (str, total)
785 "time in %s: %d.%06d\n",
786 str, total / 1000000, total % 1000000);
789 /* Count an error or warning. Return 1 if the message should be printed. */
792 count_error (warningp)
795 if (warningp && inhibit_warnings)
798 if (warningp && !warnings_are_errors)
802 static int warning_message = 0;
804 if (warningp && !warning_message)
806 fprintf (stderr, "%s: warnings being treated as errors\n", progname);
815 /* Print a fatal error message. NAME is the text.
816 Also include a system error message based on `errno'. */
819 pfatal_with_name (name)
822 fprintf (stderr, "%s: ", progname);
828 fatal_io_error (name)
831 fprintf (stderr, "%s: %s: I/O error\n", progname, name);
844 /* Called to give a better error message when we don't have an insn to match
845 what we are looking for or if the insn's constraints aren't satisfied,
846 rather than just calling abort(). */
849 fatal_insn_not_found (insn)
852 if (INSN_CODE (insn) < 0)
853 error ("internal error--unrecognizable insn:", 0);
855 error ("internal error--insn does not satisfy its constraints:", 0);
858 fflush (asm_out_file);
860 fflush (aux_info_file);
862 fflush (rtl_dump_file);
863 if (jump_opt_dump_file)
864 fflush (jump_opt_dump_file);
866 fflush (cse_dump_file);
868 fflush (loop_dump_file);
870 fflush (cse2_dump_file);
872 fflush (flow_dump_file);
873 if (combine_dump_file)
874 fflush (combine_dump_file);
876 fflush (sched_dump_file);
877 if (local_reg_dump_file)
878 fflush (local_reg_dump_file);
879 if (global_reg_dump_file)
880 fflush (global_reg_dump_file);
881 if (sched2_dump_file)
882 fflush (sched2_dump_file);
883 if (jump2_opt_dump_file)
884 fflush (jump2_opt_dump_file);
885 if (dbr_sched_dump_file)
886 fflush (dbr_sched_dump_file);
887 if (stack_reg_dump_file)
888 fflush (stack_reg_dump_file);
892 /* This is the default decl_printable_name function. */
895 decl_name (decl, kind)
899 return IDENTIFIER_POINTER (DECL_NAME (decl));
902 static int need_error_newline;
904 /* Function of last error message;
905 more generally, function such that if next error message is in it
906 then we don't have to mention the function name. */
907 static tree last_error_function = NULL;
909 /* Used to detect when input_file_stack has changed since last described. */
910 static int last_error_tick;
912 /* Called when the start of a function definition is parsed,
913 this function prints on stderr the name of the function. */
916 announce_function (decl)
922 if (rtl_dump_and_exit)
923 fprintf (stderr, "%s ", IDENTIFIER_POINTER (DECL_NAME (decl)));
925 fprintf (stderr, " %s", (*decl_printable_name) (decl, &junk));
927 need_error_newline = 1;
928 last_error_function = current_function_decl;
932 /* Prints out, if necessary, the name of the current function
933 which caused an error. Called from all error and warning functions. */
936 report_error_function (file)
939 struct file_stack *p;
941 if (need_error_newline)
943 fprintf (stderr, "\n");
944 need_error_newline = 0;
947 if (last_error_function != current_function_decl)
949 char *kind = "function";
950 if (current_function_decl != 0
951 && TREE_CODE (TREE_TYPE (current_function_decl)) == METHOD_TYPE)
955 fprintf (stderr, "%s: ", file);
957 if (current_function_decl == NULL)
958 fprintf (stderr, "At top level:\n");
961 char *name = (*decl_printable_name) (current_function_decl, &kind);
962 fprintf (stderr, "In %s `%s':\n", kind, name);
965 last_error_function = current_function_decl;
967 if (input_file_stack && input_file_stack->next != 0
968 && input_file_stack_tick != last_error_tick)
970 fprintf (stderr, "In file included");
971 for (p = input_file_stack->next; p; p = p->next)
973 fprintf (stderr, " from %s:%d", p->name, p->line);
975 fprintf (stderr, ",");
977 fprintf (stderr, ":\n");
978 last_error_tick = input_file_stack_tick;
982 /* Report an error at the current line number.
983 S is a string and V and V2 are args for `printf'. We use HOST_WIDE_INT
984 as the type for these args assuming it is wide enough to hold a
985 pointer. This isn't terribly portable, but is the best we can do
986 without vprintf universally available. */
991 HOST_WIDE_INT v; /* Also used as pointer */
992 HOST_WIDE_INT v2; /* Also used as pointer */
994 error_with_file_and_line (input_filename, lineno, s, v, v2);
997 /* Report an error at line LINE of file FILE.
998 S and V are a string and an arg for `printf'. */
1001 error_with_file_and_line (file, line, s, v, v2)
1010 report_error_function (file);
1013 fprintf (stderr, "%s:%d: ", file, line);
1015 fprintf (stderr, "%s: ", progname);
1016 fprintf (stderr, s, v, v2);
1017 fprintf (stderr, "\n");
1020 /* Report an error at the declaration DECL.
1021 S and V are a string and an arg which uses %s to substitute
1022 the declaration name. */
1025 error_with_decl (decl, s, v)
1033 report_error_function (DECL_SOURCE_FILE (decl));
1035 fprintf (stderr, "%s:%d: ",
1036 DECL_SOURCE_FILE (decl), DECL_SOURCE_LINE (decl));
1038 if (DECL_NAME (decl))
1039 fprintf (stderr, s, (*decl_printable_name) (decl, &junk), v);
1041 fprintf (stderr, s, "((anonymous))", v);
1042 fprintf (stderr, "\n");
1045 /* Report an error at the line number of the insn INSN.
1046 S and V are a string and an arg for `printf'.
1047 This is used only when INSN is an `asm' with operands,
1048 and each ASM_OPERANDS records its own source file and line. */
1051 error_for_asm (insn, s, v, v2)
1054 HOST_WIDE_INT v; /* Also used as pointer */
1055 HOST_WIDE_INT v2; /* Also used as pointer */
1059 rtx body = PATTERN (insn);
1062 /* Find the (or one of the) ASM_OPERANDS in the insn. */
1063 if (GET_CODE (body) == SET && GET_CODE (SET_SRC (body)) == ASM_OPERANDS)
1064 asmop = SET_SRC (body);
1065 else if (GET_CODE (body) == ASM_OPERANDS)
1067 else if (GET_CODE (body) == PARALLEL
1068 && GET_CODE (XVECEXP (body, 0, 0)) == SET)
1069 asmop = SET_SRC (XVECEXP (body, 0, 0));
1070 else if (GET_CODE (body) == PARALLEL
1071 && GET_CODE (XVECEXP (body, 0, 0)) == ASM_OPERANDS)
1072 asmop = XVECEXP (body, 0, 0);
1074 filename = ASM_OPERANDS_SOURCE_FILE (asmop);
1075 line = ASM_OPERANDS_SOURCE_LINE (asmop);
1077 error_with_file_and_line (filename, line, s, v, v2);
1080 /* Report a warning at line LINE.
1081 S and V are a string and an arg for `printf'. */
1084 warning_with_file_and_line (file, line, s, v, v2, v3)
1088 HOST_WIDE_INT v, v2, v3;
1090 if (count_error (1) == 0)
1093 report_error_function (file);
1096 fprintf (stderr, "%s:%d: ", file, line);
1098 fprintf (stderr, "%s: ", progname);
1100 fprintf (stderr, "warning: ");
1101 fprintf (stderr, s, v, v2, v3);
1102 fprintf (stderr, "\n");
1105 /* Report a warning at the current line number.
1106 S and V are a string and an arg for `printf'. */
1109 warning (s, v, v2, v3)
1111 HOST_WIDE_INT v, v2, v3; /* Also used as pointer */
1113 warning_with_file_and_line (input_filename, lineno, s, v, v2, v3);
1116 /* Report a warning at the declaration DECL.
1117 S is string which uses %s to substitute the declaration name.
1118 V is a second parameter that S can refer to. */
1121 warning_with_decl (decl, s, v)
1128 if (count_error (1) == 0)
1131 report_error_function (DECL_SOURCE_FILE (decl));
1133 fprintf (stderr, "%s:%d: ",
1134 DECL_SOURCE_FILE (decl), DECL_SOURCE_LINE (decl));
1136 fprintf (stderr, "warning: ");
1137 if (DECL_NAME (decl))
1138 fprintf (stderr, s, (*decl_printable_name) (decl, &junk), v);
1140 fprintf (stderr, s, "((anonymous))", v);
1141 fprintf (stderr, "\n");
1144 /* Report a warning at the line number of the insn INSN.
1145 S and V are a string and an arg for `printf'.
1146 This is used only when INSN is an `asm' with operands,
1147 and each ASM_OPERANDS records its own source file and line. */
1150 warning_for_asm (insn, s, v, v2)
1153 HOST_WIDE_INT v; /* Also used as pointer */
1154 HOST_WIDE_INT v2; /* Also used as pointer */
1158 rtx body = PATTERN (insn);
1161 /* Find the (or one of the) ASM_OPERANDS in the insn. */
1162 if (GET_CODE (body) == SET && GET_CODE (SET_SRC (body)) == ASM_OPERANDS)
1163 asmop = SET_SRC (body);
1164 else if (GET_CODE (body) == ASM_OPERANDS)
1166 else if (GET_CODE (body) == PARALLEL
1167 && GET_CODE (XVECEXP (body, 0, 0)) == SET)
1168 asmop = SET_SRC (XVECEXP (body, 0, 0));
1169 else if (GET_CODE (body) == PARALLEL
1170 && GET_CODE (XVECEXP (body, 0, 0)) == ASM_OPERANDS)
1171 asmop = XVECEXP (body, 0, 0);
1173 filename = ASM_OPERANDS_SOURCE_FILE (asmop);
1174 line = ASM_OPERANDS_SOURCE_LINE (asmop);
1176 warning_with_file_and_line (filename, line, s, v, v2);
1179 /* These functions issue either warnings or errors depending on
1180 -pedantic-errors. */
1185 HOST_WIDE_INT v; /* Also used as pointer */
1188 if (flag_pedantic_errors)
1195 pedwarn_with_decl (decl, s, v)
1200 if (flag_pedantic_errors)
1201 error_with_decl (decl, s, v);
1203 warning_with_decl (decl, s, v);
1207 pedwarn_with_file_and_line (file, line, s, v, v2)
1214 if (flag_pedantic_errors)
1215 error_with_file_and_line (file, line, s, v, v2);
1217 warning_with_file_and_line (file, line, s, v, v2);
1220 /* Apologize for not implementing some feature.
1221 S, V, and V2 are a string and args for `printf'. */
1226 HOST_WIDE_INT v, v2;
1230 fprintf (stderr, "%s:%d: ", input_filename, lineno);
1232 fprintf (stderr, "%s: ", progname);
1234 fprintf (stderr, "sorry, not implemented: ");
1235 fprintf (stderr, s, v, v2);
1236 fprintf (stderr, "\n");
1239 /* Apologize for not implementing some feature, then quit.
1240 S, V, and V2 are a string and args for `printf'. */
1243 really_sorry (s, v, v2)
1245 HOST_WIDE_INT v, v2;
1248 fprintf (stderr, "%s:%d: ", input_filename, lineno);
1250 fprintf (stderr, "c++: ");
1252 fprintf (stderr, "sorry, not implemented: ");
1253 fprintf (stderr, s, v, v2);
1254 fatal (" (fatal)\n");
1257 /* More 'friendly' abort that prints the line and file.
1258 config.h can #define abort fancy_abort if you like that sort of thing.
1260 I don't think this is actually a good idea.
1261 Other sorts of crashes will look a certain way.
1262 It is a good thing if crashes from calling abort look the same way.
1268 fatal ("internal gcc abort");
1271 /* This calls abort and is used to avoid problems when abort if a macro.
1272 It is used when we need to pass the address of abort. */
1280 /* When `malloc.c' is compiled with `rcheck' defined,
1281 it calls this function to report clobberage. */
1289 /* Same as `malloc' but report error if no memory available. */
1295 register char *value = (char *) malloc (size);
1297 fatal ("virtual memory exhausted");
1301 /* Same as `realloc' but report error if no memory available. */
1304 xrealloc (ptr, size)
1308 char *result = (char *) realloc (ptr, size);
1310 fatal ("virtual memory exhausted");
1314 /* Return the logarithm of X, base 2, considering X unsigned,
1315 if X is a power of 2. Otherwise, returns -1.
1317 This should be used via the `exact_log2' macro. */
1321 register unsigned HOST_WIDE_INT x;
1323 register int log = 0;
1324 /* Test for 0 or a power of 2. */
1325 if (x == 0 || x != (x & -x))
1327 while ((x >>= 1) != 0)
1332 /* Given X, an unsigned number, return the largest int Y such that 2**Y <= X.
1333 If X is 0, return -1.
1335 This should be used via the floor_log2 macro. */
1339 register unsigned HOST_WIDE_INT x;
1341 register int log = -1;
1349 jmp_buf float_handler;
1351 /* Specify where to longjmp to when a floating arithmetic error happens.
1352 If HANDLER is 0, it means don't handle the errors any more. */
1355 set_float_handler (handler)
1358 float_handled = (handler != 0);
1360 bcopy (handler, float_handler, sizeof (float_handler));
1363 /* Specify, in HANDLER, where to longjmp to when a floating arithmetic
1364 error happens, pushing the previous specification into OLD_HANDLER.
1365 Return an indication of whether there was a previous handler in effect. */
1368 push_float_handler (handler, old_handler)
1369 jmp_buf handler, old_handler;
1371 int was_handled = float_handled;
1375 bcopy (float_handler, old_handler, sizeof (float_handler));
1376 bcopy (handler, float_handler, sizeof (float_handler));
1380 /* Restore the previous specification of whether and where to longjmp to
1381 when a floating arithmetic error happens. */
1384 pop_float_handler (handled, handler)
1388 float_handled = handled;
1390 bcopy (handler, float_handler, sizeof (float_handler));
1393 /* Signals actually come here. */
1396 float_signal (signo)
1397 /* If this is missing, some compilers complain. */
1400 if (float_handled == 0)
1402 #if defined (USG) || defined (hpux)
1403 signal (SIGFPE, float_signal); /* re-enable the signal catcher */
1406 signal (SIGFPE, float_signal);
1407 longjmp (float_handler, 1);
1410 /* Handler for SIGPIPE. */
1414 /* If this is missing, some compilers complain. */
1417 fatal ("output pipe has been closed");
1420 /* Strip off a legitimate source ending from the input string NAME of
1424 strip_off_ending (name, len)
1428 if (len > 2 && ! strcmp (".c", name + len - 2))
1430 else if (len > 2 && ! strcmp (".m", name + len - 2))
1432 else if (len > 2 && ! strcmp (".i", name + len - 2))
1434 else if (len > 3 && ! strcmp (".ii", name + len - 3))
1436 else if (len > 3 && ! strcmp (".co", name + len - 3))
1438 else if (len > 3 && ! strcmp (".cc", name + len - 3))
1440 else if (len > 2 && ! strcmp (".C", name + len - 2))
1442 else if (len > 4 && ! strcmp (".cxx", name + len - 4))
1444 else if (len > 2 && ! strcmp (".f", name + len - 2))
1446 else if (len > 4 && ! strcmp (".ada", name + len - 4))
1450 /* Output a file name in the form wanted by System V. */
1453 output_file_directive (asm_file, input_name)
1457 int len = strlen (input_name);
1458 char *na = input_name + len;
1460 /* NA gets INPUT_NAME sans directory names. */
1461 while (na > input_name)
1468 #ifdef ASM_OUTPUT_MAIN_SOURCE_FILENAME
1469 ASM_OUTPUT_MAIN_SOURCE_FILENAME (asm_file, na);
1471 #ifdef ASM_OUTPUT_SOURCE_FILENAME
1472 ASM_OUTPUT_SOURCE_FILENAME (asm_file, na);
1474 fprintf (asm_file, "\t.file\t\"%s\"\n", na);
1479 /* Compile an entire file of output from cpp, named NAME.
1480 Write a file of assembly output and various debugging dumps. */
1488 int dump_base_name_length;
1490 int name_specified = name != 0;
1492 if (dump_base_name == 0)
1493 dump_base_name = name ? name : "gccdump";
1494 dump_base_name_length = strlen (dump_base_name);
1498 integration_time = 0;
1506 local_alloc_time = 0;
1507 global_alloc_time = 0;
1510 shorten_branch_time = 0;
1516 /* Open input file. */
1518 if (name == 0 || !strcmp (name, "-"))
1524 finput = fopen (name, "r");
1526 pfatal_with_name (name);
1528 #ifdef IO_BUFFER_SIZE
1529 setvbuf (finput, (char *) xmalloc (IO_BUFFER_SIZE), _IOFBF, IO_BUFFER_SIZE);
1532 /* Initialize data in various passes. */
1538 init_emit_once (debug_info_level == DINFO_LEVEL_NORMAL
1539 || debug_info_level == DINFO_LEVEL_VERBOSE);
1540 init_decl_processing ();
1548 if (flag_caller_saves)
1549 init_caller_save ();
1551 /* If auxiliary info generation is desired, open the output file.
1552 This goes in the same directory as the source file--unlike
1553 all the other output files. */
1554 if (flag_gen_aux_info)
1556 aux_info_file = fopen (aux_info_file_name, "w");
1557 if (aux_info_file == 0)
1558 pfatal_with_name (aux_info_file_name);
1561 /* If rtl dump desired, open the output file. */
1564 register char *dumpname = (char *) xmalloc (dump_base_name_length + 6);
1565 strcpy (dumpname, dump_base_name);
1566 strcat (dumpname, ".rtl");
1567 rtl_dump_file = fopen (dumpname, "w");
1568 if (rtl_dump_file == 0)
1569 pfatal_with_name (dumpname);
1572 /* If jump_opt dump desired, open the output file. */
1575 register char *dumpname = (char *) xmalloc (dump_base_name_length + 6);
1576 strcpy (dumpname, dump_base_name);
1577 strcat (dumpname, ".jump");
1578 jump_opt_dump_file = fopen (dumpname, "w");
1579 if (jump_opt_dump_file == 0)
1580 pfatal_with_name (dumpname);
1583 /* If cse dump desired, open the output file. */
1586 register char *dumpname = (char *) xmalloc (dump_base_name_length + 6);
1587 strcpy (dumpname, dump_base_name);
1588 strcat (dumpname, ".cse");
1589 cse_dump_file = fopen (dumpname, "w");
1590 if (cse_dump_file == 0)
1591 pfatal_with_name (dumpname);
1594 /* If loop dump desired, open the output file. */
1597 register char *dumpname = (char *) xmalloc (dump_base_name_length + 6);
1598 strcpy (dumpname, dump_base_name);
1599 strcat (dumpname, ".loop");
1600 loop_dump_file = fopen (dumpname, "w");
1601 if (loop_dump_file == 0)
1602 pfatal_with_name (dumpname);
1605 /* If cse2 dump desired, open the output file. */
1608 register char *dumpname = (char *) xmalloc (dump_base_name_length + 6);
1609 strcpy (dumpname, dump_base_name);
1610 strcat (dumpname, ".cse2");
1611 cse2_dump_file = fopen (dumpname, "w");
1612 if (cse2_dump_file == 0)
1613 pfatal_with_name (dumpname);
1616 /* If flow dump desired, open the output file. */
1619 register char *dumpname = (char *) xmalloc (dump_base_name_length + 6);
1620 strcpy (dumpname, dump_base_name);
1621 strcat (dumpname, ".flow");
1622 flow_dump_file = fopen (dumpname, "w");
1623 if (flow_dump_file == 0)
1624 pfatal_with_name (dumpname);
1627 /* If combine dump desired, open the output file. */
1630 register char *dumpname = (char *) xmalloc (dump_base_name_length + 10);
1631 strcpy (dumpname, dump_base_name);
1632 strcat (dumpname, ".combine");
1633 combine_dump_file = fopen (dumpname, "w");
1634 if (combine_dump_file == 0)
1635 pfatal_with_name (dumpname);
1638 /* If scheduling dump desired, open the output file. */
1641 register char *dumpname = (char *) xmalloc (dump_base_name_length + 7);
1642 strcpy (dumpname, dump_base_name);
1643 strcat (dumpname, ".sched");
1644 sched_dump_file = fopen (dumpname, "w");
1645 if (sched_dump_file == 0)
1646 pfatal_with_name (dumpname);
1649 /* If local_reg dump desired, open the output file. */
1652 register char *dumpname = (char *) xmalloc (dump_base_name_length + 6);
1653 strcpy (dumpname, dump_base_name);
1654 strcat (dumpname, ".lreg");
1655 local_reg_dump_file = fopen (dumpname, "w");
1656 if (local_reg_dump_file == 0)
1657 pfatal_with_name (dumpname);
1660 /* If global_reg dump desired, open the output file. */
1661 if (global_reg_dump)
1663 register char *dumpname = (char *) xmalloc (dump_base_name_length + 6);
1664 strcpy (dumpname, dump_base_name);
1665 strcat (dumpname, ".greg");
1666 global_reg_dump_file = fopen (dumpname, "w");
1667 if (global_reg_dump_file == 0)
1668 pfatal_with_name (dumpname);
1671 /* If 2nd scheduling dump desired, open the output file. */
1674 register char *dumpname = (char *) xmalloc (dump_base_name_length + 8);
1675 strcpy (dumpname, dump_base_name);
1676 strcat (dumpname, ".sched2");
1677 sched2_dump_file = fopen (dumpname, "w");
1678 if (sched2_dump_file == 0)
1679 pfatal_with_name (dumpname);
1682 /* If jump2_opt dump desired, open the output file. */
1685 register char *dumpname = (char *) xmalloc (dump_base_name_length + 7);
1686 strcpy (dumpname, dump_base_name);
1687 strcat (dumpname, ".jump2");
1688 jump2_opt_dump_file = fopen (dumpname, "w");
1689 if (jump2_opt_dump_file == 0)
1690 pfatal_with_name (dumpname);
1693 /* If dbr_sched dump desired, open the output file. */
1696 register char *dumpname = (char *) xmalloc (dump_base_name_length + 7);
1697 strcpy (dumpname, dump_base_name);
1698 strcat (dumpname, ".dbr");
1699 dbr_sched_dump_file = fopen (dumpname, "w");
1700 if (dbr_sched_dump_file == 0)
1701 pfatal_with_name (dumpname);
1706 /* If stack_reg dump desired, open the output file. */
1709 register char *dumpname = (char *) xmalloc (dump_base_name_length + 10);
1710 strcpy (dumpname, dump_base_name);
1711 strcat (dumpname, ".stack");
1712 stack_reg_dump_file = fopen (dumpname, "w");
1713 if (stack_reg_dump_file == 0)
1714 pfatal_with_name (dumpname);
1719 /* Open assembler code output file. */
1721 if (! name_specified && asm_file_name == 0)
1722 asm_out_file = stdout;
1725 register char *dumpname = (char *) xmalloc (dump_base_name_length + 6);
1726 int len = strlen (dump_base_name);
1727 strcpy (dumpname, dump_base_name);
1728 strip_off_ending (dumpname, len);
1729 strcat (dumpname, ".s");
1730 if (asm_file_name == 0)
1732 asm_file_name = (char *) xmalloc (strlen (dumpname) + 1);
1733 strcpy (asm_file_name, dumpname);
1735 if (!strcmp (asm_file_name, "-"))
1736 asm_out_file = stdout;
1738 asm_out_file = fopen (asm_file_name, "w");
1739 if (asm_out_file == 0)
1740 pfatal_with_name (asm_file_name);
1743 #ifdef IO_BUFFER_SIZE
1744 setvbuf (asm_out_file, (char *) xmalloc (IO_BUFFER_SIZE),
1745 _IOFBF, IO_BUFFER_SIZE);
1748 input_filename = name;
1750 /* Perform language-specific initialization.
1751 This may set main_input_filename. */
1754 /* If the input doesn't start with a #line, use the input name
1755 as the official input file name. */
1756 if (main_input_filename == 0)
1757 main_input_filename = name;
1759 /* Put an entry on the input file stack for the main input file. */
1761 = (struct file_stack *) xmalloc (sizeof (struct file_stack));
1762 input_file_stack->next = 0;
1763 input_file_stack->name = input_filename;
1765 ASM_FILE_START (asm_out_file);
1767 /* Output something to inform GDB that this compilation was by GCC. */
1768 #ifndef ASM_IDENTIFY_GCC
1769 fprintf (asm_out_file, "gcc2_compiled.:\n");
1771 ASM_IDENTIFY_GCC (asm_out_file);
1773 /* Don't let the first function fall at the same address
1774 as gcc_compiled., if profiling. */
1775 if (profile_flag || profile_block_flag)
1776 assemble_zeros (UNITS_PER_WORD);
1778 /* If dbx symbol table desired, initialize writing it
1779 and output the predefined types. */
1780 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
1781 if (write_symbols == DBX_DEBUG || write_symbols == XCOFF_DEBUG)
1782 TIMEVAR (symout_time, dbxout_init (asm_out_file, main_input_filename,
1785 #ifdef SDB_DEBUGGING_INFO
1786 if (write_symbols == SDB_DEBUG)
1787 TIMEVAR (symout_time, sdbout_init (asm_out_file, main_input_filename,
1790 #ifdef DWARF_DEBUGGING_INFO
1791 if (write_symbols == DWARF_DEBUG)
1792 TIMEVAR (symout_time, dwarfout_init (asm_out_file, main_input_filename));
1795 /* Initialize yet another pass. */
1797 init_final (main_input_filename);
1799 start_time = get_run_time ();
1801 /* Call the parser, which parses the entire file
1802 (calling rest_of_compilation for each function). */
1804 if (yyparse () != 0)
1805 if (errorcount == 0)
1806 fprintf (stderr, "Errors detected in input file (your bison.simple is out of date)");
1808 /* Compilation is now finished except for writing
1809 what's left of the symbol table output. */
1811 parse_time += get_run_time () - start_time;
1813 parse_time -= integration_time;
1814 parse_time -= varconst_time;
1816 globals = getdecls ();
1818 /* Really define vars that have had only a tentative definition.
1819 Really output inline functions that must actually be callable
1820 and have not been output so far. */
1823 int len = list_length (globals);
1824 tree *vec = (tree *) alloca (sizeof (tree) * len);
1828 /* Process the decls in reverse order--earliest first.
1829 Put them into VEC from back to front, then take out from front. */
1831 for (i = 0, decl = globals; i < len; i++, decl = TREE_CHAIN (decl))
1832 vec[len - i - 1] = decl;
1834 for (i = 0; i < len; i++)
1837 if (TREE_CODE (decl) == VAR_DECL && TREE_STATIC (decl)
1838 && ! TREE_ASM_WRITTEN (decl))
1840 /* Don't write out static consts, unless we used them.
1841 (This used to write them out only if the address was
1842 taken, but that was wrong; if the variable was simply
1843 referred to, it still needs to exist or else it will
1844 be undefined in the linker.) */
1845 if (! TREE_READONLY (decl)
1846 || TREE_PUBLIC (decl)
1848 || TREE_ADDRESSABLE (decl)
1849 || TREE_ADDRESSABLE (DECL_ASSEMBLER_NAME (decl)))
1850 rest_of_decl_compilation (decl, NULL_PTR, 1, 1);
1852 /* Cancel the RTL for this decl so that, if debugging info
1853 output for global variables is still to come,
1854 this one will be omitted. */
1855 DECL_RTL (decl) = NULL;
1858 if (TREE_CODE (decl) == FUNCTION_DECL
1859 && ! TREE_ASM_WRITTEN (decl)
1860 && DECL_INITIAL (decl) != 0
1861 && (TREE_ADDRESSABLE (decl)
1862 || TREE_ADDRESSABLE (DECL_ASSEMBLER_NAME (decl)))
1863 && ! DECL_EXTERNAL (decl))
1864 output_inline_function (decl);
1866 /* Warn about any function
1867 declared static but not defined.
1868 We don't warn about variables,
1869 because many programs have static variables
1870 that exist only to get some text into the object file. */
1873 || (DECL_NAME (decl) && TREE_USED (DECL_NAME (decl))))
1874 && TREE_CODE (decl) == FUNCTION_DECL
1875 && DECL_INITIAL (decl) == 0
1876 && DECL_EXTERNAL (decl)
1877 && ! TREE_PUBLIC (decl))
1878 warning_with_decl (decl, "`%s' declared `static' but never defined");
1879 /* Warn about static fns or vars defined but not used,
1880 but not about inline functions
1881 since unused inline statics is normal practice. */
1883 && (TREE_CODE (decl) == FUNCTION_DECL
1884 || TREE_CODE (decl) == VAR_DECL)
1885 && ! DECL_IN_SYSTEM_HEADER (decl)
1886 && ! DECL_EXTERNAL (decl)
1887 && ! TREE_PUBLIC (decl)
1888 && ! TREE_USED (decl)
1889 && ! DECL_INLINE (decl)
1890 /* The TREE_USED bit for file-scope decls
1891 is kept in the identifier, to handle multiple
1892 external decls in different scopes. */
1893 && ! TREE_USED (DECL_NAME (decl)))
1894 warning_with_decl (decl, "`%s' defined but not used");
1896 #ifdef SDB_DEBUGGING_INFO
1897 /* The COFF linker can move initialized global vars to the end.
1898 And that can screw up the symbol ordering.
1899 By putting the symbols in that order to begin with,
1900 we avoid a problem. mcsun!unido!fauern!tumuc!pes@uunet.uu.net. */
1901 if (write_symbols == SDB_DEBUG && TREE_CODE (decl) == VAR_DECL
1902 && TREE_PUBLIC (decl) && DECL_INITIAL (decl)
1903 && DECL_RTL (decl) != 0)
1904 TIMEVAR (symout_time, sdbout_symbol (decl, 0));
1906 /* Output COFF information for non-global
1907 file-scope initialized variables. */
1908 if (write_symbols == SDB_DEBUG
1909 && TREE_CODE (decl) == VAR_DECL
1910 && DECL_INITIAL (decl)
1911 && DECL_RTL (decl) != 0
1912 && GET_CODE (DECL_RTL (decl)) == MEM)
1913 TIMEVAR (symout_time, sdbout_toplevel_data (decl));
1914 #endif /* SDB_DEBUGGING_INFO */
1915 #ifdef DWARF_DEBUGGING_INFO
1916 /* Output DWARF information for file-scope tentative data object
1917 declarations, file-scope (extern) function declarations (which
1918 had no corresponding body) and file-scope tagged type declarations
1919 and definitions which have not yet been forced out. */
1921 if (write_symbols == DWARF_DEBUG
1922 && (TREE_CODE (decl) != FUNCTION_DECL || !DECL_INITIAL (decl)))
1923 TIMEVAR (symout_time, dwarfout_file_scope_decl (decl, 1));
1928 /* Do dbx symbols */
1929 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
1930 if (write_symbols == DBX_DEBUG || write_symbols == XCOFF_DEBUG)
1931 TIMEVAR (symout_time,
1933 dbxout_finish (asm_out_file, main_input_filename);
1937 #ifdef DWARF_DEBUGGING_INFO
1938 if (write_symbols == DWARF_DEBUG)
1939 TIMEVAR (symout_time,
1945 /* Output some stuff at end of file if nec. */
1947 end_final (main_input_filename);
1950 ASM_FILE_END (asm_out_file);
1953 after_finish_compilation:
1955 /* Language-specific end of compilation actions. */
1959 /* Close the dump files. */
1961 if (flag_gen_aux_info)
1963 fclose (aux_info_file);
1965 unlink (aux_info_file_name);
1969 fclose (rtl_dump_file);
1972 fclose (jump_opt_dump_file);
1975 fclose (cse_dump_file);
1978 fclose (loop_dump_file);
1981 fclose (cse2_dump_file);
1984 fclose (flow_dump_file);
1988 dump_combine_total_stats (combine_dump_file);
1989 fclose (combine_dump_file);
1993 fclose (sched_dump_file);
1996 fclose (local_reg_dump_file);
1998 if (global_reg_dump)
1999 fclose (global_reg_dump_file);
2002 fclose (sched2_dump_file);
2005 fclose (jump2_opt_dump_file);
2008 fclose (dbr_sched_dump_file);
2012 fclose (stack_reg_dump_file);
2015 /* Close non-debugging input and output files. Take special care to note
2016 whether fclose returns an error, since the pages might still be on the
2017 buffer chain while the file is open. */
2020 if (ferror (asm_out_file) != 0 || fclose (asm_out_file) != 0)
2021 fatal_io_error (asm_file_name);
2023 /* Print the times. */
2027 fprintf (stderr,"\n");
2028 print_time ("parse", parse_time);
2029 print_time ("integration", integration_time);
2030 print_time ("jump", jump_time);
2031 print_time ("cse", cse_time);
2032 print_time ("loop", loop_time);
2033 print_time ("cse2", cse2_time);
2034 print_time ("flow", flow_time);
2035 print_time ("combine", combine_time);
2036 print_time ("sched", sched_time);
2037 print_time ("local-alloc", local_alloc_time);
2038 print_time ("global-alloc", global_alloc_time);
2039 print_time ("sched2", sched2_time);
2040 print_time ("dbranch", dbr_sched_time);
2041 print_time ("shorten-branch", shorten_branch_time);
2042 print_time ("stack-reg", stack_reg_time);
2043 print_time ("final", final_time);
2044 print_time ("varconst", varconst_time);
2045 print_time ("symout", symout_time);
2046 print_time ("dump", dump_time);
2050 /* This is called from various places for FUNCTION_DECL, VAR_DECL,
2051 and TYPE_DECL nodes.
2053 This does nothing for local (non-static) variables.
2054 Otherwise, it sets up the RTL and outputs any assembler code
2055 (label definition, storage allocation and initialization).
2057 DECL is the declaration. If ASMSPEC is nonzero, it specifies
2058 the assembler symbol name to be used. TOP_LEVEL is nonzero
2059 if this declaration is not within a function. */
2062 rest_of_decl_compilation (decl, asmspec, top_level, at_end)
2068 /* Declarations of variables, and of functions defined elsewhere. */
2070 /* Forward declarations for nested functions are not "external",
2071 but we need to treat them as if they were. */
2072 if (TREE_STATIC (decl) || DECL_EXTERNAL (decl)
2073 || TREE_CODE (decl) == FUNCTION_DECL)
2074 TIMEVAR (varconst_time,
2076 make_decl_rtl (decl, asmspec, top_level);
2077 /* For a user-invisible decl that should be replaced
2078 by its value when used, don't output anything. */
2079 if (! (TREE_CODE (decl) == VAR_DECL
2080 && DECL_IGNORED_P (decl) && TREE_READONLY (decl)
2081 && DECL_INITIAL (decl) != 0))
2082 /* Don't output anything
2083 when a tentative file-scope definition is seen.
2084 But at end of compilation, do output code for them. */
2085 if (! (! at_end && top_level
2086 && (DECL_INITIAL (decl) == 0
2087 || DECL_INITIAL (decl) == error_mark_node
2088 || DECL_IGNORED_P (decl))))
2089 assemble_variable (decl, top_level, at_end);
2091 else if (DECL_REGISTER (decl) && asmspec != 0)
2093 if (decode_reg_name (asmspec) >= 0)
2095 DECL_RTL (decl) = 0;
2096 make_decl_rtl (decl, asmspec, top_level);
2099 error ("invalid register name `%s' for register variable", asmspec);
2101 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
2102 else if ((write_symbols == DBX_DEBUG || write_symbols == XCOFF_DEBUG)
2103 && TREE_CODE (decl) == TYPE_DECL)
2104 TIMEVAR (symout_time, dbxout_symbol (decl, 0));
2106 #ifdef SDB_DEBUGGING_INFO
2107 else if (write_symbols == SDB_DEBUG && top_level
2108 && TREE_CODE (decl) == TYPE_DECL)
2109 TIMEVAR (symout_time, sdbout_symbol (decl, 0));
2113 /* Called after finishing a record, union or enumeral type. */
2116 rest_of_type_compilation (type, toplev)
2120 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
2121 if (write_symbols == DBX_DEBUG || write_symbols == XCOFF_DEBUG)
2122 TIMEVAR (symout_time, dbxout_symbol (TYPE_STUB_DECL (type), !toplev));
2124 #ifdef SDB_DEBUGGING_INFO
2125 if (write_symbols == SDB_DEBUG)
2126 TIMEVAR (symout_time, sdbout_symbol (TYPE_STUB_DECL (type), !toplev));
2130 /* This is called from finish_function (within yyparse)
2131 after each top-level definition is parsed.
2132 It is supposed to compile that function or variable
2133 and output the assembler code for it.
2134 After we return, the tree storage is freed. */
2137 rest_of_compilation (decl)
2141 int start_time = get_run_time ();
2143 /* Nonzero if we have saved the original DECL_INITIAL of the function,
2144 to be restored after we finish compiling the function
2145 (for use when compiling inline calls to this function). */
2146 tree saved_block_tree = 0;
2147 /* Likewise, for DECL_ARGUMENTS. */
2148 tree saved_arguments = 0;
2151 /* If we are reconsidering an inline function
2152 at the end of compilation, skip the stuff for making it inline. */
2154 if (DECL_SAVED_INSNS (decl) == 0)
2156 int specd = DECL_INLINE (decl);
2159 /* If requested, consider whether to make this function inline. */
2160 if (specd || flag_inline_functions)
2161 TIMEVAR (integration_time,
2163 lose = function_cannot_inline_p (decl);
2166 if (warn_inline && specd)
2167 warning_with_decl (decl, lose);
2168 DECL_INLINE (decl) = 0;
2171 DECL_INLINE (decl) = 1;
2174 insns = get_insns ();
2176 /* Dump the rtl code if we are dumping rtl. */
2181 fprintf (rtl_dump_file, "\n;; Function %s\n\n",
2182 IDENTIFIER_POINTER (DECL_NAME (decl)));
2183 if (DECL_SAVED_INSNS (decl))
2184 fprintf (rtl_dump_file, ";; (integrable)\n\n");
2185 print_rtl (rtl_dump_file, insns);
2186 fflush (rtl_dump_file);
2189 /* If function is inline, and we don't yet know whether to
2190 compile it by itself, defer decision till end of compilation.
2191 finish_compilation will call rest_of_compilation again
2192 for those functions that need to be output. */
2194 if (DECL_INLINE (decl)
2195 && ((! TREE_PUBLIC (decl) && ! TREE_ADDRESSABLE (decl)
2196 && ! flag_keep_inline_functions)
2197 || DECL_EXTERNAL (decl)))
2199 #ifdef DWARF_DEBUGGING_INFO
2200 /* Generate the DWARF info for the "abstract" instance
2201 of a function which we may later generate inlined and/or
2202 out-of-line instances of. */
2203 if (write_symbols == DWARF_DEBUG)
2205 set_decl_abstract_flags (decl, 1);
2206 TIMEVAR (symout_time, dwarfout_file_scope_decl (decl, 0));
2207 set_decl_abstract_flags (decl, 0);
2210 TIMEVAR (integration_time, save_for_inline_nocopy (decl));
2211 goto exit_rest_of_compilation;
2214 /* If we have to compile the function now, save its rtl and subdecls
2215 so that its compilation will not affect what others get. */
2216 if (DECL_INLINE (decl))
2218 #ifdef DWARF_DEBUGGING_INFO
2219 /* Generate the DWARF info for the "abstract" instance of
2220 a function which we will generate an out-of-line instance
2221 of almost immediately (and which we may also later generate
2222 various inlined instances of). */
2223 if (write_symbols == DWARF_DEBUG)
2225 set_decl_abstract_flags (decl, 1);
2226 TIMEVAR (symout_time, dwarfout_file_scope_decl (decl, 0));
2227 set_decl_abstract_flags (decl, 0);
2230 saved_block_tree = DECL_INITIAL (decl);
2231 saved_arguments = DECL_ARGUMENTS (decl);
2232 TIMEVAR (integration_time, save_for_inline_copying (decl));
2236 TREE_ASM_WRITTEN (decl) = 1;
2238 /* Now that integrate will no longer see our rtl, we need not distinguish
2239 between the return value of this function and the return value of called
2241 rtx_equal_function_value_matters = 0;
2243 /* Don't return yet if -Wreturn-type; we need to do jump_optimize. */
2244 if ((rtl_dump_and_exit || flag_syntax_only) && !warn_return_type)
2246 goto exit_rest_of_compilation;
2249 /* From now on, allocate rtl in current_obstack, not in saveable_obstack.
2250 Note that that may have been done above, in save_for_inline_copying.
2251 The call to resume_temporary_allocation near the end of this function
2252 goes back to the usual state of affairs. */
2254 rtl_in_current_obstack ();
2257 /* If we are doing position-independent code generation, now
2258 is the time to output special prologues and epilogues.
2259 We do not want to do this earlier, because it just clutters
2260 up inline functions with meaningless insns. */
2265 insns = get_insns ();
2267 /* Copy any shared structure that should not be shared. */
2269 unshare_all_rtl (insns);
2271 /* Instantiate all virtual registers. */
2273 instantiate_virtual_regs (current_function_decl, get_insns ());
2275 /* See if we have allocated stack slots that are not directly addressable.
2276 If so, scan all the insns and create explicit address computation
2277 for all references to such slots. */
2278 /* fixup_stack_slots (); */
2280 /* Do jump optimization the first time, if -opt.
2281 Also do it if -W, but in that case it doesn't change the rtl code,
2282 it only computes whether control can drop off the end of the function. */
2284 if (optimize > 0 || extra_warnings || warn_return_type
2285 /* If function is `volatile', we should warn if it tries to return. */
2286 || TREE_THIS_VOLATILE (decl))
2288 TIMEVAR (jump_time, reg_scan (insns, max_reg_num (), 0));
2289 TIMEVAR (jump_time, jump_optimize (insns, 0, 0, 1));
2292 /* Now is when we stop if -fsyntax-only and -Wreturn-type. */
2293 if (rtl_dump_and_exit || flag_syntax_only)
2294 goto exit_rest_of_compilation;
2296 /* Dump rtl code after jump, if we are doing that. */
2301 fprintf (jump_opt_dump_file, "\n;; Function %s\n\n",
2302 IDENTIFIER_POINTER (DECL_NAME (decl)));
2303 print_rtl (jump_opt_dump_file, insns);
2304 fflush (jump_opt_dump_file);
2307 /* Perform common subexpression elimination.
2308 Nonzero value from `cse_main' means that jumps were simplified
2309 and some code may now be unreachable, so do
2310 jump optimization again. */
2315 fprintf (cse_dump_file, "\n;; Function %s\n\n",
2316 IDENTIFIER_POINTER (DECL_NAME (decl)));
2321 TIMEVAR (cse_time, reg_scan (insns, max_reg_num (), 1));
2323 if (flag_thread_jumps)
2324 /* Hacks by tiemann & kenner. */
2325 TIMEVAR (jump_time, thread_jumps (insns, max_reg_num (), 0));
2327 TIMEVAR (cse_time, tem = cse_main (insns, max_reg_num (),
2329 TIMEVAR (cse_time, delete_dead_from_cse (insns, max_reg_num ()));
2332 TIMEVAR (jump_time, jump_optimize (insns, 0, 0, 0));
2335 /* Dump rtl code after cse, if we are doing that. */
2340 print_rtl (cse_dump_file, insns);
2341 fflush (cse_dump_file);
2347 fprintf (loop_dump_file, "\n;; Function %s\n\n",
2348 IDENTIFIER_POINTER (DECL_NAME (decl)));
2351 /* Move constant computations out of loops. */
2357 loop_optimize (insns, loop_dump_file);
2361 /* Dump rtl code after loop opt, if we are doing that. */
2366 print_rtl (loop_dump_file, insns);
2367 fflush (loop_dump_file);
2373 fprintf (cse2_dump_file, "\n;; Function %s\n\n",
2374 IDENTIFIER_POINTER (DECL_NAME (decl)));
2377 if (optimize > 0 && flag_rerun_cse_after_loop)
2379 TIMEVAR (cse2_time, reg_scan (insns, max_reg_num (), 0));
2381 TIMEVAR (cse2_time, tem = cse_main (insns, max_reg_num (),
2382 1, cse2_dump_file));
2384 TIMEVAR (jump_time, jump_optimize (insns, 0, 0, 0));
2387 if (optimize > 0 && flag_thread_jumps)
2388 /* This pass of jump threading straightens out code
2389 that was kinked by loop optimization. */
2390 TIMEVAR (jump_time, thread_jumps (insns, max_reg_num (), 0));
2392 /* Dump rtl code after cse, if we are doing that. */
2397 print_rtl (cse2_dump_file, insns);
2398 fflush (cse2_dump_file);
2401 /* We are no longer anticipating cse in this function, at least. */
2403 cse_not_expected = 1;
2405 /* Now we choose between stupid (pcc-like) register allocation
2406 (if we got the -noreg switch and not -opt)
2407 and smart register allocation. */
2409 if (optimize > 0) /* Stupid allocation probably won't work */
2410 obey_regdecls = 0; /* if optimizations being done. */
2414 /* Print function header into flow dump now
2415 because doing the flow analysis makes some of the dump. */
2420 fprintf (flow_dump_file, "\n;; Function %s\n\n",
2421 IDENTIFIER_POINTER (DECL_NAME (decl)));
2428 regclass (insns, max_reg_num ());
2429 stupid_life_analysis (insns, max_reg_num (),
2435 /* Do control and data flow analysis,
2436 and write some of the results to dump file. */
2438 TIMEVAR (flow_time, flow_analysis (insns, max_reg_num (),
2440 if (warn_uninitialized)
2442 uninitialized_vars_warning (DECL_INITIAL (decl));
2443 setjmp_args_warning ();
2447 /* Dump rtl after flow analysis. */
2452 print_rtl (flow_dump_file, insns);
2453 fflush (flow_dump_file);
2456 /* If -opt, try combining insns through substitution. */
2459 TIMEVAR (combine_time, combine_instructions (insns, max_reg_num ()));
2461 /* Dump rtl code after insn combination. */
2466 fprintf (combine_dump_file, "\n;; Function %s\n\n",
2467 IDENTIFIER_POINTER (DECL_NAME (decl)));
2468 dump_combine_stats (combine_dump_file);
2469 print_rtl (combine_dump_file, insns);
2470 fflush (combine_dump_file);
2473 /* Print function header into sched dump now
2474 because doing the sched analysis makes some of the dump. */
2479 fprintf (sched_dump_file, "\n;; Function %s\n\n",
2480 IDENTIFIER_POINTER (DECL_NAME (decl)));
2483 if (optimize > 0 && flag_schedule_insns)
2485 /* Do control and data sched analysis,
2486 and write some of the results to dump file. */
2488 TIMEVAR (sched_time, schedule_insns (sched_dump_file));
2491 /* Dump rtl after instruction scheduling. */
2496 print_rtl (sched_dump_file, insns);
2497 fflush (sched_dump_file);
2500 /* Unless we did stupid register allocation,
2501 allocate pseudo-regs that are used only within 1 basic block. */
2504 TIMEVAR (local_alloc_time,
2506 regclass (insns, max_reg_num ());
2510 /* Dump rtl code after allocating regs within basic blocks. */
2515 fprintf (local_reg_dump_file, "\n;; Function %s\n\n",
2516 IDENTIFIER_POINTER (DECL_NAME (decl)));
2517 dump_flow_info (local_reg_dump_file);
2518 dump_local_alloc (local_reg_dump_file);
2519 print_rtl (local_reg_dump_file, insns);
2520 fflush (local_reg_dump_file);
2523 if (global_reg_dump)
2525 fprintf (global_reg_dump_file, "\n;; Function %s\n\n",
2526 IDENTIFIER_POINTER (DECL_NAME (decl))));
2528 /* Unless we did stupid register allocation,
2529 allocate remaining pseudo-regs, then do the reload pass
2530 fixing up any insns that are invalid. */
2532 TIMEVAR (global_alloc_time,
2535 failure = global_alloc (global_reg_dump_file);
2537 failure = reload (insns, 0, global_reg_dump_file);
2540 if (global_reg_dump)
2543 dump_global_regs (global_reg_dump_file);
2544 print_rtl (global_reg_dump_file, insns);
2545 fflush (global_reg_dump_file);
2549 goto exit_rest_of_compilation;
2551 reload_completed = 1;
2553 /* On some machines, the prologue and epilogue code, or parts thereof,
2554 can be represented as RTL. Doing so lets us schedule insns between
2555 it and the rest of the code and also allows delayed branch
2556 scheduling to operate in the epilogue. */
2558 thread_prologue_and_epilogue_insns (insns);
2560 if (optimize > 0 && flag_schedule_insns_after_reload)
2565 fprintf (sched2_dump_file, "\n;; Function %s\n\n",
2566 IDENTIFIER_POINTER (DECL_NAME (decl)));
2569 /* Do control and data sched analysis again,
2570 and write some more of the results to dump file. */
2572 TIMEVAR (sched2_time, schedule_insns (sched2_dump_file));
2574 /* Dump rtl after post-reorder instruction scheduling. */
2579 print_rtl (sched2_dump_file, insns);
2580 fflush (sched2_dump_file);
2584 #ifdef LEAF_REGISTERS
2586 if (optimize > 0 && only_leaf_regs_used () && leaf_function_p ())
2590 /* One more attempt to remove jumps to .+1
2591 left by dead-store-elimination.
2592 Also do cross-jumping this time
2593 and delete no-op move insns. */
2597 TIMEVAR (jump_time, jump_optimize (insns, 1, 1, 0));
2600 /* Dump rtl code after jump, if we are doing that. */
2605 fprintf (jump2_opt_dump_file, "\n;; Function %s\n\n",
2606 IDENTIFIER_POINTER (DECL_NAME (decl)));
2607 print_rtl (jump2_opt_dump_file, insns);
2608 fflush (jump2_opt_dump_file);
2611 /* If a scheduling pass for delayed branches is to be done,
2612 call the scheduling code. */
2615 if (optimize > 0 && flag_delayed_branch)
2617 TIMEVAR (dbr_sched_time, dbr_schedule (insns, dbr_sched_dump_file));
2622 fprintf (dbr_sched_dump_file, "\n;; Function %s\n\n",
2623 IDENTIFIER_POINTER (DECL_NAME (decl)));
2624 print_rtl (dbr_sched_dump_file, insns);
2625 fflush (dbr_sched_dump_file);
2632 /* Shorten branches. */
2633 TIMEVAR (shorten_branch_time,
2635 shorten_branches (get_insns ());
2639 TIMEVAR (stack_reg_time, reg_to_stack (insns, stack_reg_dump_file));
2644 fprintf (stack_reg_dump_file, "\n;; Function %s\n\n",
2645 IDENTIFIER_POINTER (DECL_NAME (decl)));
2646 print_rtl (stack_reg_dump_file, insns);
2647 fflush (stack_reg_dump_file);
2652 /* Now turn the rtl into assembler code. */
2654 TIMEVAR (final_time,
2659 /* Get the function's name, as described by its RTL.
2660 This may be different from the DECL_NAME name used
2661 in the source file. */
2663 x = DECL_RTL (decl);
2664 if (GET_CODE (x) != MEM)
2667 if (GET_CODE (x) != SYMBOL_REF)
2669 fnname = XSTR (x, 0);
2671 assemble_start_function (decl, fnname);
2672 final_start_function (insns, asm_out_file, optimize);
2673 final (insns, asm_out_file, optimize, 0);
2674 final_end_function (insns, asm_out_file, optimize);
2675 assemble_end_function (decl, fnname);
2676 fflush (asm_out_file);
2679 /* Write DBX symbols if requested */
2681 /* Note that for those inline functions where we don't initially
2682 know for certain that we will be generating an out-of-line copy,
2683 the first invocation of this routine (rest_of_compilation) will
2684 skip over this code by doing a `goto exit_rest_of_compilation;'.
2685 Later on, finish_compilation will call rest_of_compilation again
2686 for those inline functions that need to have out-of-line copies
2687 generated. During that call, we *will* be routed past here. */
2689 #ifdef DBX_DEBUGGING_INFO
2690 if (write_symbols == DBX_DEBUG)
2691 TIMEVAR (symout_time, dbxout_function (decl));
2694 #ifdef DWARF_DEBUGGING_INFO
2695 if (write_symbols == DWARF_DEBUG)
2696 TIMEVAR (symout_time, dwarfout_file_scope_decl (decl, 0));
2699 exit_rest_of_compilation:
2701 /* In case the function was not output,
2702 don't leave any temporary anonymous types
2703 queued up for sdb output. */
2704 #ifdef SDB_DEBUGGING_INFO
2705 if (write_symbols == SDB_DEBUG)
2706 sdbout_types (NULL_TREE);
2709 /* Put back the tree of subblocks and list of arguments
2710 from before we copied them.
2711 Code generation and the output of debugging info may have modified
2712 the copy, but the original is unchanged. */
2714 if (saved_block_tree != 0)
2715 DECL_INITIAL (decl) = saved_block_tree;
2716 if (saved_arguments != 0)
2717 DECL_ARGUMENTS (decl) = saved_arguments;
2719 reload_completed = 0;
2721 /* Clear out the real_constant_chain before some of the rtx's
2722 it runs through become garbage. */
2724 clear_const_double_mem ();
2726 /* Cancel the effect of rtl_in_current_obstack. */
2728 resume_temporary_allocation ();
2730 /* The parsing time is all the time spent in yyparse
2731 *except* what is spent in this function. */
2733 parse_time -= get_run_time () - start_time;
2736 /* Entry point of cc1/c++. Decode command args, then call compile_file.
2737 Exit code is 35 if can't open files, 34 if fatal error,
2738 33 if had nonfatal errors, else success. */
2741 main (argc, argv, envp)
2748 int flag_print_mem = 0;
2749 int version_flag = 0;
2752 /* save in case md file wants to emit args as a comment. */
2756 p = argv[0] + strlen (argv[0]);
2757 while (p != argv[0] && p[-1] != '/') --p;
2761 /* Get rid of any avoidable limit on stack size. */
2765 /* Set the stack limit huge so that alloca does not fail. */
2766 getrlimit (RLIMIT_STACK, &rlim);
2767 rlim.rlim_cur = rlim.rlim_max;
2768 setrlimit (RLIMIT_STACK, &rlim);
2770 #endif /* RLIMIT_STACK */
2772 signal (SIGFPE, float_signal);
2774 signal (SIGPIPE, pipe_closed);
2776 decl_printable_name = decl_name;
2777 lang_expand_expr = (struct rtx_def *(*)()) do_abort;
2779 /* Initialize whether `char' is signed. */
2780 flag_signed_char = DEFAULT_SIGNED_CHAR;
2781 #ifdef DEFAULT_SHORT_ENUMS
2782 /* Initialize how much space enums occupy, by default. */
2783 flag_short_enums = DEFAULT_SHORT_ENUMS;
2786 /* Scan to see what optimization level has been specified. That will
2787 determine the default value of many flags. */
2788 for (i = 1; i < argc; i++)
2790 if (!strcmp (argv[i], "-O"))
2794 else if (argv[i][0] == '-' && argv[i][1] == 'O')
2796 /* Handle -O2, -O3, -O69, ... */
2797 char *p = &argv[i][2];
2801 if (! (c >= '0' && c <= '9'))
2804 optimize = atoi (&argv[i][2]);
2808 obey_regdecls = (optimize == 0);
2817 flag_thread_jumps = 1;
2819 flag_delayed_branch = 1;
2825 flag_cse_follow_jumps = 1;
2826 flag_cse_skip_blocks = 1;
2827 flag_expensive_optimizations = 1;
2828 flag_strength_reduce = 1;
2829 flag_rerun_cse_after_loop = 1;
2830 flag_caller_saves = 1;
2831 #ifdef INSN_SCHEDULING
2832 flag_schedule_insns = 1;
2833 flag_schedule_insns_after_reload = 1;
2837 #ifdef OPTIMIZATION_OPTIONS
2838 /* Allow default optimizations to be specified on a per-machine basis. */
2839 OPTIMIZATION_OPTIONS (optimize);
2842 /* Initialize register usage now so switches may override. */
2846 set_target_switch ("");
2848 for (i = 1; i < argc; i++)
2851 /* If this is a language-specific option,
2852 decode it in a language-specific way. */
2853 for (j = 0; lang_options[j] != 0; j++)
2854 if (!strncmp (argv[i], lang_options[j],
2855 strlen (lang_options[j])))
2857 if (lang_options[j] != 0)
2858 /* If the option is valid for *some* language,
2859 treat it as valid even if this language doesn't understand it. */
2860 lang_decode_option (argv[i]);
2861 else if (argv[i][0] == '-' && argv[i][1] != 0)
2863 register char *str = argv[i] + 1;
2868 set_target_switch (&str[1]);
2869 else if (!strcmp (str, "dumpbase"))
2871 dump_base_name = argv[++i];
2873 else if (str[0] == 'd')
2875 register char *p = &str[1];
2883 global_reg_dump = 1;
2889 cse_dump = 1, cse2_dump = 1;
2907 global_reg_dump = 1;
2925 flag_print_asm_name = 1;
2947 rtl_dump_and_exit = 1;
2951 else if (str[0] == 'f')
2953 register char *p = &str[1];
2956 /* Some kind of -f option.
2957 P's value is the option sans `-f'.
2958 Search for it in the table of options. */
2961 !found && j < sizeof (f_options) / sizeof (f_options[0]);
2964 if (!strcmp (p, f_options[j].string))
2966 *f_options[j].variable = f_options[j].on_value;
2967 /* A goto here would be cleaner,
2968 but breaks the vax pcc. */
2971 if (p[0] == 'n' && p[1] == 'o' && p[2] == '-'
2972 && ! strcmp (p+3, f_options[j].string))
2974 *f_options[j].variable = ! f_options[j].on_value;
2981 else if (!strncmp (p, "fixed-", 6))
2982 fix_register (&p[6], 1, 1);
2983 else if (!strncmp (p, "call-used-", 10))
2984 fix_register (&p[10], 0, 1);
2985 else if (!strncmp (p, "call-saved-", 11))
2986 fix_register (&p[11], 0, 0);
2988 error ("Invalid option `%s'", argv[i]);
2990 else if (str[0] == 'O')
2992 register char *p = str+1;
2993 while (*p && *p >= '0' && *p <= '9')
2998 error ("Invalid option `%s'", argv[i]);
3000 else if (!strcmp (str, "pedantic"))
3002 else if (!strcmp (str, "pedantic-errors"))
3003 flag_pedantic_errors = pedantic = 1;
3004 else if (!strcmp (str, "quiet"))
3006 else if (!strcmp (str, "version"))
3008 else if (!strcmp (str, "w"))
3009 inhibit_warnings = 1;
3010 else if (!strcmp (str, "W"))
3013 warn_uninitialized = 1;
3015 else if (str[0] == 'W')
3017 register char *p = &str[1];
3020 /* Some kind of -W option.
3021 P's value is the option sans `-W'.
3022 Search for it in the table of options. */
3025 !found && j < sizeof (W_options) / sizeof (W_options[0]);
3028 if (!strcmp (p, W_options[j].string))
3030 *W_options[j].variable = W_options[j].on_value;
3031 /* A goto here would be cleaner,
3032 but breaks the vax pcc. */
3035 if (p[0] == 'n' && p[1] == 'o' && p[2] == '-'
3036 && ! strcmp (p+3, W_options[j].string))
3038 *W_options[j].variable = ! W_options[j].on_value;
3045 else if (!strncmp (p, "id-clash-", 9))
3051 if (*endp >= '0' && *endp <= '9')
3055 error ("Invalid option `%s'", argv[i]);
3060 id_clash_len = atoi (str + 10);
3064 error ("Invalid option `%s'", argv[i]);
3066 else if (!strcmp (str, "p"))
3068 else if (!strcmp (str, "a"))
3070 #if !defined (BLOCK_PROFILER) || !defined (FUNCTION_BLOCK_PROFILER)
3071 warning ("`-a' option (basic block profile) not supported");
3073 profile_block_flag = 1;
3076 else if (str[0] == 'g')
3083 while (*p && (*p < '0' || *p > '9'))
3087 while (*q && (*q >= '0' && *q <= '9'))
3092 level = 2; /* default debugging info level */
3093 if (*q || level > 3)
3095 warning ("invalid debug level specification in option: `-%s'",
3097 warning ("no debugging information will be generated");
3101 /* If more than one debugging type is supported,
3102 you must define PREFERRED_DEBUGGING_TYPE
3103 to choose a format in a system-dependent way. */
3104 /* This is one long line cause VAXC can't handle a \-newline. */
3105 #if 1 < (defined (DBX_DEBUGGING_INFO) + defined (SDB_DEBUGGING_INFO) + defined (DWARF_DEBUGGING_INFO) + defined (XCOFF_DEBUGGING_INFO))
3106 #ifdef PREFERRED_DEBUGGING_TYPE
3107 if (!strncmp (str, "ggdb", len))
3108 write_symbols = PREFERRED_DEBUGGING_TYPE;
3109 #else /* no PREFERRED_DEBUGGING_TYPE */
3110 You Lose! You must define PREFERRED_DEBUGGING_TYPE!
3111 #endif /* no PREFERRED_DEBUGGING_TYPE */
3112 #endif /* More than one debugger format enabled. */
3113 #ifdef DBX_DEBUGGING_INFO
3114 if (write_symbols != NO_DEBUG)
3116 else if (!strncmp (str, "ggdb", len))
3117 write_symbols = DBX_DEBUG;
3118 else if (!strncmp (str, "gstabs", len))
3119 write_symbols = DBX_DEBUG;
3120 else if (!strncmp (str, "gstabs+", len))
3121 write_symbols = DBX_DEBUG;
3123 /* Always enable extensions for -ggdb or -gstabs+,
3124 always disable for -gstabs.
3125 For plain -g, use system-specific default. */
3126 if (write_symbols == DBX_DEBUG && !strncmp (str, "ggdb", len)
3128 use_gnu_debug_info_extensions = 1;
3129 else if (write_symbols == DBX_DEBUG && !strcmp (str, "gstabs+"))
3130 use_gnu_debug_info_extensions = 1;
3131 else if (write_symbols == DBX_DEBUG
3132 && !strncmp (str, "gstabs", len) && len >= 2)
3133 use_gnu_debug_info_extensions = 0;
3135 use_gnu_debug_info_extensions = DEFAULT_GDB_EXTENSIONS;
3136 #endif /* DBX_DEBUGGING_INFO */
3137 #ifdef DWARF_DEBUGGING_INFO
3138 if (write_symbols != NO_DEBUG)
3140 else if (!strncmp (str, "g", len))
3141 write_symbols = DWARF_DEBUG;
3142 else if (!strncmp (str, "ggdb", len))
3143 write_symbols = DWARF_DEBUG;
3144 else if (!strncmp (str, "gdwarf", len))
3145 write_symbols = DWARF_DEBUG;
3147 /* Always enable extensions for -ggdb or -gdwarf+,
3148 always disable for -gdwarf.
3149 For plain -g, use system-specific default. */
3150 if (write_symbols == DWARF_DEBUG && !strncmp (str, "ggdb", len)
3152 use_gnu_debug_info_extensions = 1;
3153 else if (write_symbols == DWARF_DEBUG && !strcmp (str, "gdwarf+"))
3154 use_gnu_debug_info_extensions = 1;
3155 else if (write_symbols == DWARF_DEBUG
3156 && !strncmp (str, "gdwarf", len) && len >= 2)
3157 use_gnu_debug_info_extensions = 0;
3159 use_gnu_debug_info_extensions = DEFAULT_GDB_EXTENSIONS;
3161 #ifdef SDB_DEBUGGING_INFO
3162 if (write_symbols != NO_DEBUG)
3164 else if (!strncmp (str, "g", len))
3165 write_symbols = SDB_DEBUG;
3166 else if (!strncmp (str, "gdb", len))
3167 write_symbols = SDB_DEBUG;
3168 else if (!strncmp (str, "gcoff", len))
3169 write_symbols = SDB_DEBUG;
3170 #endif /* SDB_DEBUGGING_INFO */
3171 #ifdef XCOFF_DEBUGGING_INFO
3172 if (write_symbols != NO_DEBUG)
3174 else if (!strncmp (str, "g", len))
3175 write_symbols = XCOFF_DEBUG;
3176 else if (!strncmp (str, "ggdb", len))
3177 write_symbols = XCOFF_DEBUG;
3178 else if (!strncmp (str, "gxcoff", len))
3179 write_symbols = XCOFF_DEBUG;
3181 /* Always enable extensions for -ggdb or -gxcoff+,
3182 always disable for -gxcoff.
3183 For plain -g, use system-specific default. */
3184 if (write_symbols == XCOFF_DEBUG && !strncmp (str, "ggdb", len)
3186 use_gnu_debug_info_extensions = 1;
3187 else if (write_symbols == XCOFF_DEBUG && !strcmp (str, "gxcoff+"))
3188 use_gnu_debug_info_extensions = 1;
3189 else if (write_symbols == XCOFF_DEBUG
3190 && !strncmp (str, "gxcoff", len) && len >= 2)
3191 use_gnu_debug_info_extensions = 0;
3193 use_gnu_debug_info_extensions = DEFAULT_GDB_EXTENSIONS;
3195 if (write_symbols == NO_DEBUG)
3196 warning ("`-%s' option not supported on this version of GCC", str);
3197 else if (level == 0)
3198 write_symbols = NO_DEBUG;
3200 debug_info_level = (enum debug_info_level) level;
3202 else if (!strcmp (str, "o"))
3204 asm_file_name = argv[++i];
3206 else if (str[0] == 'G')
3208 g_switch_set = TRUE;
3209 g_switch_value = atoi ((str[1] != '\0') ? str+1 : argv[++i]);
3211 else if (!strncmp (str, "aux-info", 8))
3213 flag_gen_aux_info = 1;
3214 aux_info_file_name = (str[8] != '\0' ? str+8 : argv[++i]);
3217 error ("Invalid option `%s'", argv[i]);
3219 else if (argv[i][0] == '+')
3220 error ("Invalid option `%s'", argv[i]);
3225 /* Inlining does not work if not optimizing,
3226 so force it not to be done. */
3233 #ifdef OVERRIDE_OPTIONS
3234 /* Some machines may reject certain combinations of options. */
3238 /* Unrolling all loops implies that standard loop unrolling must also
3240 if (flag_unroll_all_loops)
3241 flag_unroll_loops = 1;
3242 /* Loop unrolling requires that strength_reduction be on also. Silently
3243 turn on strength reduction here if it isn't already on. Also, the loop
3244 unrolling code assumes that cse will be run after loop, so that must
3245 be turned on also. */
3246 if (flag_unroll_loops)
3248 flag_strength_reduce = 1;
3249 flag_rerun_cse_after_loop = 1;
3252 /* Warn about options that are not supported on this machine. */
3253 #ifndef INSN_SCHEDULING
3254 if (flag_schedule_insns || flag_schedule_insns_after_reload)
3255 warning ("instruction scheduling not supported on this target machine");
3258 if (flag_delayed_branch)
3259 warning ("this target machine does not have delayed branches");
3262 /* If we are in verbose mode, write out the version and maybe all the
3263 option flags in use. */
3266 fprintf (stderr, "%s version %s", language_string, version_string);
3267 #ifdef TARGET_VERSION
3272 #define __VERSION__ "[unknown]"
3274 fprintf (stderr, " compiled by GNU C version %s.\n", __VERSION__);
3276 fprintf (stderr, " compiled by CC.\n");
3279 print_switch_values ();
3282 /* Now that register usage is specified, convert it to HARD_REG_SETs. */
3285 compile_file (filename);
3291 char *lim = (char *) sbrk (0);
3293 fprintf (stderr, "Data size %d.\n",
3294 lim - (char *) &environ);
3298 system ("ps -l 1>&2");
3301 #endif /* not USG */
3303 #endif /* not VMS */
3304 #endif /* not OS2 */
3307 exit (FATAL_EXIT_CODE);
3309 exit (FATAL_EXIT_CODE);
3310 exit (SUCCESS_EXIT_CODE);
3314 /* Decode -m switches. */
3316 /* Here is a table, controlled by the tm.h file, listing each -m switch
3317 and which bits in `target_switches' it should set or clear.
3318 If VALUE is positive, it is bits to set.
3319 If VALUE is negative, -VALUE is bits to clear.
3320 (The sign bit is not used so there is no confusion.) */
3322 struct {char *name; int value;} target_switches []
3325 /* This table is similar, but allows the switch to have a value. */
3327 #ifdef TARGET_OPTIONS
3328 struct {char *prefix; char ** variable;} target_options []
3332 /* Decode the switch -mNAME. */
3335 set_target_switch (name)
3341 for (j = 0; j < sizeof target_switches / sizeof target_switches[0]; j++)
3342 if (!strcmp (target_switches[j].name, name))
3344 if (target_switches[j].value < 0)
3345 target_flags &= ~-target_switches[j].value;
3347 target_flags |= target_switches[j].value;
3351 #ifdef TARGET_OPTIONS
3353 for (j = 0; j < sizeof target_options / sizeof target_options[0]; j++)
3355 int len = strlen (target_options[j].prefix);
3356 if (!strncmp (target_options[j].prefix, name, len))
3358 *target_options[j].variable = name + len;
3365 error ("Invalid option `%s'", name);
3368 /* Variable used for communication between the following two routines. */
3370 static int line_position;
3372 /* Print an option value and adjust the position in the line. */
3375 print_single_switch (type, name)
3378 fprintf (stderr, " %s%s", type, name);
3380 line_position += strlen (type) + strlen (name) + 1;
3382 if (line_position > 65)
3384 fprintf (stderr, "\n\t");
3389 /* Print default target switches for -version. */
3392 print_switch_values ()
3396 fprintf (stderr, "enabled:");
3399 for (j = 0; j < sizeof f_options / sizeof f_options[0]; j++)
3400 if (*f_options[j].variable == f_options[j].on_value)
3401 print_single_switch ("-f", f_options[j].string);
3403 for (j = 0; j < sizeof W_options / sizeof W_options[0]; j++)
3404 if (*W_options[j].variable == W_options[j].on_value)
3405 print_single_switch ("-W", W_options[j].string);
3407 for (j = 0; j < sizeof target_switches / sizeof target_switches[0]; j++)
3408 if (target_switches[j].name[0] != '\0'
3409 && target_switches[j].value > 0
3410 && ((target_switches[j].value & target_flags)
3411 == target_switches[j].value))
3412 print_single_switch ("-m", target_switches[j].name);
3414 fprintf (stderr, "\n");