1 /* Top level of GNU C compiler
2 Copyright (C) 1987, 88, 89, 92-6, 1997 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, 59 Temple Place - Suite 330,
19 Boston, MA 02111-1307, 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. */
35 #include <sys/types.h>
42 #include <sys/param.h>
43 /* This is for hpux. It is a real screw. They should change hpux. */
45 #include <sys/times.h>
46 #include <time.h> /* Correct for hpux at least. Is it good on other USG? */
47 #undef FFS /* Some systems define this in param.h. */
51 #include <sys/resource.h>
60 #include "insn-attr.h"
67 #ifdef XCOFF_DEBUGGING_INFO
72 /* The extra parameters substantially improve the I/O performance. */
74 vms_fopen (fname, type)
78 /* The <stdio.h> in the gcc-vms-1.42 distribution prototypes fopen with two
79 fixed arguments, which matches ANSI's specification but not VAXCRTL's
80 pre-ANSI implementation. This hack circumvents the mismatch problem. */
81 FILE *(*vmslib_fopen)() = (FILE *(*)()) fopen;
84 return (*vmslib_fopen) (fname, type, "mbc=32",
85 "deq=64", "fop=tef", "shr=nil");
87 return (*vmslib_fopen) (fname, type, "mbc=32");
89 #define fopen vms_fopen
92 #ifndef DEFAULT_GDB_EXTENSIONS
93 #define DEFAULT_GDB_EXTENSIONS 1
96 /* If more than one debugging type is supported, you must define
97 PREFERRED_DEBUGGING_TYPE to choose a format in a system-dependent way.
99 This is one long line cause VAXC can't handle a \-newline. */
100 #if 1 < (defined (DBX_DEBUGGING_INFO) + defined (SDB_DEBUGGING_INFO) + defined (DWARF_DEBUGGING_INFO) + defined (DWARF2_DEBUGGING_INFO) + defined (XCOFF_DEBUGGING_INFO))
101 #ifndef PREFERRED_DEBUGGING_TYPE
102 You Lose! You must define PREFERRED_DEBUGGING_TYPE!
103 #endif /* no PREFERRED_DEBUGGING_TYPE */
104 #else /* Only one debugging format supported. Define PREFERRED_DEBUGGING_TYPE
105 so the following code needn't care. */
106 #ifdef DBX_DEBUGGING_INFO
107 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
109 #ifdef SDB_DEBUGGING_INFO
110 #define PREFERRED_DEBUGGING_TYPE SDB_DEBUG
112 #ifdef DWARF_DEBUGGING_INFO
113 #define PREFERRED_DEBUGGING_TYPE DWARF_DEBUG
115 #ifdef DWARF2_DEBUGGING_INFO
116 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
118 #ifdef XCOFF_DEBUGGING_INFO
119 #define PREFERRED_DEBUGGING_TYPE XCOFF_DEBUG
121 #endif /* More than one debugger format enabled. */
123 /* If still not defined, must have been because no debugging formats
125 #ifndef PREFERRED_DEBUGGING_TYPE
126 #define PREFERRED_DEBUGGING_TYPE NO_DEBUG
129 extern int rtx_equal_function_value_matters;
131 #if ! (defined (VMS) || defined (OS2))
132 extern char **environ;
134 extern char *version_string, *language_string;
136 /* Carry information from ASM_DECLARE_OBJECT_NAME
137 to ASM_FINISH_DECLARE_OBJECT. */
139 extern int size_directive_output;
140 extern tree last_assemble_variable_decl;
142 extern void init_lex ();
143 extern void init_decl_processing ();
144 extern void init_obstacks ();
145 extern void init_tree_codes ();
146 extern void init_rtl ();
147 extern void init_regs ();
148 extern void init_optabs ();
149 extern void init_stmt ();
150 extern void init_reg_sets ();
151 extern void dump_flow_info ();
152 extern void dump_sched_info ();
153 extern void dump_local_alloc ();
155 void rest_of_decl_compilation ();
156 void error_with_file_and_line PVPROTO((char *file, int line, char *s, ...));
157 void error_with_decl PVPROTO((tree decl, char *s, ...));
158 void error_for_asm PVPROTO((rtx insn, char *s, ...));
159 void error PVPROTO((char *s, ...));
160 void fatal PVPROTO((char *s, ...));
161 void warning_with_file_and_line PVPROTO((char *file, int line, char *s, ...));
162 void warning_with_decl PVPROTO((tree decl, char *s, ...));
163 void warning_for_asm PVPROTO((rtx insn, char *s, ...));
164 void warning PVPROTO((char *s, ...));
165 void pedwarn PVPROTO((char *s, ...));
166 void pedwarn_with_decl PVPROTO((tree decl, char *s, ...));
167 void pedwarn_with_file_and_line PVPROTO((char *file, int line, char *s, ...));
168 void sorry PVPROTO((char *s, ...));
169 void really_sorry PVPROTO((char *s, ...));
174 void set_target_switch ();
175 static char *decl_name ();
177 void print_version ();
178 int print_single_switch ();
179 void print_switch_values ();
180 /* Length of line when printing switch values. */
184 extern char *sbrk ();
187 /* Name of program invoked, sans directories. */
191 /* Copy of arguments to main. */
195 /* Name of current original source file (what was input to cpp).
196 This comes from each #-command in the actual input. */
198 char *input_filename;
200 /* Name of top-level original source file (what was input to cpp).
201 This comes from the #-command at the beginning of the actual input.
202 If there isn't any there, then this is the cc1 input file name. */
204 char *main_input_filename;
206 /* Stream for reading from the input file. */
210 /* Current line number in real source file. */
214 /* Stack of currently pending input files. */
216 struct file_stack *input_file_stack;
218 /* Incremented on each change to input_file_stack. */
219 int input_file_stack_tick;
221 /* FUNCTION_DECL for function now being parsed or compiled. */
223 extern tree current_function_decl;
225 /* Name to use as base of names for dump output files. */
227 char *dump_base_name;
229 /* Bit flags that specify the machine subtype we are compiling for.
230 Bits are tested using macros TARGET_... defined in the tm.h file
231 and set by `-m...' switches. Must be defined in rtlanal.c. */
233 extern int target_flags;
235 /* Flags saying which kinds of debugging dump have been requested. */
238 int rtl_dump_and_exit = 0;
239 int jump_opt_dump = 0;
244 int combine_dump = 0;
246 int local_reg_dump = 0;
247 int global_reg_dump = 0;
249 int jump2_opt_dump = 0;
250 int dbr_sched_dump = 0;
251 int flag_print_asm_name = 0;
252 int stack_reg_dump = 0;
254 /* Name for output file of assembly code, specified with -o. */
258 /* Value of the -G xx switch, and whether it was passed or not. */
262 /* Type(s) of debugging information we are producing (if any).
263 See flags.h for the definitions of the different possible
264 types of debugging information. */
265 enum debug_info_type write_symbols = NO_DEBUG;
267 /* Level of debugging information we are producing. See flags.h
268 for the definitions of the different possible levels. */
269 enum debug_info_level debug_info_level = DINFO_LEVEL_NONE;
271 /* Nonzero means use GNU-only extensions in the generated symbolic
272 debugging information. */
273 /* Currently, this only has an effect when write_symbols is set to
274 DBX_DEBUG, XCOFF_DEBUG, or DWARF_DEBUG. */
275 int use_gnu_debug_info_extensions = 0;
277 /* Nonzero means do optimizations. -O.
278 Particular numeric values stand for particular amounts of optimization;
279 thus, -O2 stores 2 here. However, the optimizations beyond the basic
280 ones are not controlled directly by this variable. Instead, they are
281 controlled by individual `flag_...' variables that are defaulted
282 based on this variable. */
286 /* Number of error messages and warning messages so far. */
289 int warningcount = 0;
292 /* Flag to output bytecode instead of native assembler */
293 int output_bytecode = 0;
295 /* Pointer to function to compute the name to use to print a declaration.
296 DECL is the declaration in question.
297 VERBOSITY determines what information will be printed:
298 0: DECL_NAME, demangled as necessary.
299 1: and scope information.
300 2: and any other information that might be interesting, such as function
301 parameter types in C++. */
303 char *(*decl_printable_name) (/* tree decl, int verbosity */);
305 /* Pointer to function to compute rtl for a language-specific tree code. */
307 struct rtx_def *(*lang_expand_expr) ();
309 /* Pointer to function to finish handling an incomplete decl at the
310 end of compilation. */
312 void (*incomplete_decl_finalize_hook) () = 0;
314 /* Highest label number used at the end of reload. */
316 int max_label_num_after_reload;
318 /* Nonzero if generating code to do profiling. */
320 int profile_flag = 0;
322 /* Nonzero if generating code to do profiling on a line-by-line basis. */
324 int profile_block_flag;
326 /* Nonzero for -pedantic switch: warn about anything
327 that standard spec forbids. */
331 /* Temporarily suppress certain warnings.
332 This is set while reading code from a system header file. */
334 int in_system_header = 0;
336 /* Nonzero means do stupid register allocation.
337 Currently, this is 1 if `optimize' is 0. */
339 int obey_regdecls = 0;
341 /* Don't print functions as they are compiled and don't print
342 times taken by the various passes. -quiet. */
348 /* Nonzero means `char' should be signed. */
350 int flag_signed_char;
352 /* Nonzero means give an enum type only as many bytes as it needs. */
354 int flag_short_enums;
356 /* Nonzero for -fcaller-saves: allocate values in regs that need to
357 be saved across function calls, if that produces overall better code.
358 Optional now, so people can test it. */
360 #ifdef DEFAULT_CALLER_SAVES
361 int flag_caller_saves = 1;
363 int flag_caller_saves = 0;
366 /* Nonzero if structures and unions should be returned in memory.
368 This should only be defined if compatibility with another compiler or
369 with an ABI is needed, because it results in slower code. */
371 #ifndef DEFAULT_PCC_STRUCT_RETURN
372 #define DEFAULT_PCC_STRUCT_RETURN 1
375 /* Nonzero for -fpcc-struct-return: return values the same way PCC does. */
377 int flag_pcc_struct_return = DEFAULT_PCC_STRUCT_RETURN;
379 /* Nonzero for -fforce-mem: load memory value into a register
380 before arithmetic on it. This makes better cse but slower compilation. */
382 int flag_force_mem = 0;
384 /* Nonzero for -fforce-addr: load memory address into a register before
385 reference to memory. This makes better cse but slower compilation. */
387 int flag_force_addr = 0;
389 /* Nonzero for -fdefer-pop: don't pop args after each function call;
390 instead save them up to pop many calls' args with one insns. */
392 int flag_defer_pop = 0;
394 /* Nonzero for -ffloat-store: don't allocate floats and doubles
395 in extended-precision registers. */
397 int flag_float_store = 0;
399 /* Nonzero for -fcse-follow-jumps:
400 have cse follow jumps to do a more extensive job. */
402 int flag_cse_follow_jumps;
404 /* Nonzero for -fcse-skip-blocks:
405 have cse follow a branch around a block. */
406 int flag_cse_skip_blocks;
408 /* Nonzero for -fexpensive-optimizations:
409 perform miscellaneous relatively-expensive optimizations. */
410 int flag_expensive_optimizations;
412 /* Nonzero for -fthread-jumps:
413 have jump optimize output of loop. */
415 int flag_thread_jumps;
417 /* Nonzero enables strength-reduction in loop.c. */
419 int flag_strength_reduce = 0;
421 /* Nonzero enables loop unrolling in unroll.c. Only loops for which the
422 number of iterations can be calculated at compile-time (UNROLL_COMPLETELY,
423 UNROLL_MODULO) or at run-time (preconditioned to be UNROLL_MODULO) are
426 int flag_unroll_loops;
428 /* Nonzero enables loop unrolling in unroll.c. All loops are unrolled.
429 This is generally not a win. */
431 int flag_unroll_all_loops;
433 /* Nonzero for -fwritable-strings:
434 store string constants in data segment and don't uniquize them. */
436 int flag_writable_strings = 0;
438 /* Nonzero means don't put addresses of constant functions in registers.
439 Used for compiling the Unix kernel, where strange substitutions are
440 done on the assembly output. */
442 int flag_no_function_cse = 0;
444 /* Nonzero for -fomit-frame-pointer:
445 don't make a frame pointer in simple functions that don't require one. */
447 int flag_omit_frame_pointer = 0;
449 /* Nonzero means place each function into its own section on those platforms
450 which support arbitrary section names and unlimited numbers of sections. */
452 int flag_function_sections = 0;
454 /* Nonzero to inhibit use of define_optimization peephole opts. */
456 int flag_no_peephole = 0;
458 /* Nonzero allows GCC to violate some IEEE or ANSI rules regarding math
459 operations in the interest of optimization. For example it allows
460 GCC to assume arguments to sqrt are nonnegative numbers, allowing
461 faster code for sqrt to be generated. */
463 int flag_fast_math = 0;
465 /* Nonzero means all references through pointers are volatile. */
469 /* Nonzero means treat all global and extern variables as global. */
471 int flag_volatile_global;
473 /* Nonzero means just do syntax checking; don't output anything. */
475 int flag_syntax_only = 0;
477 /* Nonzero means to rerun cse after loop optimization. This increases
478 compilation time about 20% and picks up a few more common expressions. */
480 static int flag_rerun_cse_after_loop;
482 /* Nonzero for -finline-functions: ok to inline functions that look like
483 good inline candidates. */
485 int flag_inline_functions;
487 /* Nonzero for -fkeep-inline-functions: even if we make a function
488 go inline everywhere, keep its definition around for debugging
491 int flag_keep_inline_functions;
493 /* Nonzero means that functions will not be inlined. */
497 /* Nonzero means that we should emit static const variables
498 regardless of whether or not optimization is turned on. */
500 int flag_keep_static_consts = 1;
502 /* Nonzero means we should be saving declaration info into a .X file. */
504 int flag_gen_aux_info = 0;
506 /* Specified name of aux-info file. */
508 static char *aux_info_file_name;
510 /* Nonzero means make the text shared if supported. */
512 int flag_shared_data;
514 /* Nonzero means schedule into delayed branch slots if supported. */
516 int flag_delayed_branch;
518 /* Nonzero means to run cleanups after CALL_EXPRs. */
520 int flag_short_temps;
522 /* Nonzero if we are compiling pure (sharable) code.
523 Value is 1 if we are doing reasonable (i.e. simple
524 offset into offset table) pic. Value is 2 if we can
525 only perform register offsets. */
529 /* Nonzero means generate extra code for exception handling and enable
530 exception handling. */
532 int flag_exceptions = 1;
534 /* Nonzero means don't place uninitialized global data in common storage
539 /* Nonzero means pretend it is OK to examine bits of target floats,
540 even if that isn't true. The resulting code will have incorrect constants,
541 but the same series of instructions that the native compiler would make. */
543 int flag_pretend_float;
545 /* Nonzero means change certain warnings into errors.
546 Usually these are warnings about failure to conform to some standard. */
548 int flag_pedantic_errors = 0;
550 /* flag_schedule_insns means schedule insns within basic blocks (before
552 flag_schedule_insns_after_reload means schedule insns after
555 int flag_schedule_insns = 0;
556 int flag_schedule_insns_after_reload = 0;
558 /* -finhibit-size-directive inhibits output of .size for ELF.
559 This is used only for compiling crtstuff.c,
560 and it may be extended to other effects
561 needed for crtstuff.c on other systems. */
562 int flag_inhibit_size_directive = 0;
564 /* -fverbose-asm causes extra commentary information to be produced in
565 the generated assembly code (to make it more readable). This option
566 is generally only of use to those who actually need to read the
567 generated assembly code (perhaps while debugging the compiler itself).
568 -fverbose-asm is the default. -fno-verbose-asm causes the extra information
569 to be omitted and is useful when comparing two assembler files. */
571 int flag_verbose_asm = 1;
573 /* -dA causes debug commentary information to be produced in
574 the generated assembly code (to make it more readable). This option
575 is generally only of use to those who actually need to read the
576 generated assembly code (perhaps while debugging the compiler itself).
577 Currently, this switch is only used by dwarfout.c; however, it is intended
578 to be a catchall for printing debug information in the assembler file. */
580 int flag_debug_asm = 0;
582 /* -fgnu-linker specifies use of the GNU linker for initializations.
583 (Or, more generally, a linker that handles initializations.)
584 -fno-gnu-linker says that collect2 will be used. */
586 int flag_gnu_linker = 0;
588 int flag_gnu_linker = 1;
591 /* Tag all structures with __attribute__(packed) */
592 int flag_pack_struct = 0;
594 /* Table of language-independent -f options.
595 STRING is the option name. VARIABLE is the address of the variable.
596 ON_VALUE is the value to store in VARIABLE
597 if `-fSTRING' is seen as an option.
598 (If `-fno-STRING' is seen as an option, the opposite value is stored.) */
600 struct { char *string; int *variable; int on_value;} f_options[] =
602 {"float-store", &flag_float_store, 1},
603 {"volatile", &flag_volatile, 1},
604 {"volatile-global", &flag_volatile_global, 1},
605 {"defer-pop", &flag_defer_pop, 1},
606 {"omit-frame-pointer", &flag_omit_frame_pointer, 1},
607 {"cse-follow-jumps", &flag_cse_follow_jumps, 1},
608 {"cse-skip-blocks", &flag_cse_skip_blocks, 1},
609 {"expensive-optimizations", &flag_expensive_optimizations, 1},
610 {"thread-jumps", &flag_thread_jumps, 1},
611 {"strength-reduce", &flag_strength_reduce, 1},
612 {"unroll-loops", &flag_unroll_loops, 1},
613 {"unroll-all-loops", &flag_unroll_all_loops, 1},
614 {"writable-strings", &flag_writable_strings, 1},
615 {"peephole", &flag_no_peephole, 0},
616 {"force-mem", &flag_force_mem, 1},
617 {"force-addr", &flag_force_addr, 1},
618 {"function-cse", &flag_no_function_cse, 0},
619 {"inline-functions", &flag_inline_functions, 1},
620 {"keep-inline-functions", &flag_keep_inline_functions, 1},
621 {"inline", &flag_no_inline, 0},
622 {"keep-static-consts", &flag_keep_static_consts, 1},
623 {"syntax-only", &flag_syntax_only, 1},
624 {"shared-data", &flag_shared_data, 1},
625 {"caller-saves", &flag_caller_saves, 1},
626 {"pcc-struct-return", &flag_pcc_struct_return, 1},
627 {"reg-struct-return", &flag_pcc_struct_return, 0},
628 {"delayed-branch", &flag_delayed_branch, 1},
629 {"rerun-cse-after-loop", &flag_rerun_cse_after_loop, 1},
630 {"pretend-float", &flag_pretend_float, 1},
631 {"schedule-insns", &flag_schedule_insns, 1},
632 {"schedule-insns2", &flag_schedule_insns_after_reload, 1},
633 {"pic", &flag_pic, 1},
634 {"PIC", &flag_pic, 2},
635 {"exceptions", &flag_exceptions, 1},
636 {"fast-math", &flag_fast_math, 1},
637 {"common", &flag_no_common, 0},
638 {"inhibit-size-directive", &flag_inhibit_size_directive, 1},
639 {"function-sections", &flag_function_sections, 1},
640 {"verbose-asm", &flag_verbose_asm, 1},
641 {"gnu-linker", &flag_gnu_linker, 1},
642 {"pack-struct", &flag_pack_struct, 1},
643 {"bytecode", &output_bytecode, 1}
646 /* Table of language-specific options. */
648 char *lang_options[] =
651 "-fallow-single-precision",
653 "-fsigned-bitfields",
654 "-funsigned-bitfields",
655 "-fno-signed-bitfields",
656 "-fno-unsigned-bitfields",
660 "-fno-unsigned-char",
676 "-fno-cond-mismatch",
677 "-fdollars-in-identifiers",
678 "-fno-dollars-in-identifiers",
687 "-Wbad-function-cast",
688 "-Wno-bad-function-cast",
692 "-Wno-char-subscripts",
708 "-Wno-missing-braces",
709 "-Wmissing-declarations",
710 "-Wno-missing-declarations",
711 "-Wmissing-prototypes",
712 "-Wno-missing-prototypes",
714 "-Wno-nested-externs",
718 "-Wno-pointer-arith",
720 "-Wno-redundant-decls",
723 "-Wstrict-prototypes",
724 "-Wno-strict-prototypes",
730 "-Wno-write-strings",
732 /* these are for obj c */
748 /* Options controlling warnings */
750 /* Don't print warning messages. -w. */
752 int inhibit_warnings = 0;
754 /* Print various extra warnings. -W. */
756 int extra_warnings = 0;
758 /* Treat warnings as errors. -Werror. */
760 int warnings_are_errors = 0;
762 /* Nonzero to warn about unused local variables. */
766 /* Nonzero to warn about variables used before they are initialized. */
768 int warn_uninitialized;
770 /* Nonzero means warn about all declarations which shadow others. */
774 /* Warn if a switch on an enum fails to have a case for every enum value. */
778 /* Nonzero means warn about function definitions that default the return type
779 or that use a null return and have a return-type other than void. */
781 int warn_return_type;
783 /* Nonzero means warn about pointer casts that increase the required
784 alignment of the target type (and might therefore lead to a crash
785 due to a misaligned access). */
789 /* Nonzero means warn about any identifiers that match in the first N
790 characters. The value N is in `id_clash_len'. */
793 unsigned id_clash_len;
795 /* Nonzero means warn about any objects definitions whose size is larger
796 than N bytes. Also want about function definitions whose returned
797 values are larger than N bytes. The value N is in `larger_than_size'. */
799 int warn_larger_than;
800 unsigned larger_than_size;
802 /* Nonzero means warn if inline function is too large. */
806 /* Warn if a function returns an aggregate,
807 since there are often incompatible calling conventions for doing this. */
809 int warn_aggregate_return;
811 /* Likewise for -W. */
813 struct { char *string; int *variable; int on_value;} W_options[] =
815 {"unused", &warn_unused, 1},
816 {"error", &warnings_are_errors, 1},
817 {"shadow", &warn_shadow, 1},
818 {"switch", &warn_switch, 1},
819 {"aggregate-return", &warn_aggregate_return, 1},
820 {"cast-align", &warn_cast_align, 1},
821 {"uninitialized", &warn_uninitialized, 1},
822 {"inline", &warn_inline, 1}
825 /* Output files for assembler code (real compiler output)
826 and debugging dumps. */
831 FILE *jump_opt_dump_file;
833 FILE *loop_dump_file;
834 FILE *cse2_dump_file;
835 FILE *flow_dump_file;
836 FILE *combine_dump_file;
837 FILE *sched_dump_file;
838 FILE *local_reg_dump_file;
839 FILE *global_reg_dump_file;
840 FILE *sched2_dump_file;
841 FILE *jump2_opt_dump_file;
842 FILE *dbr_sched_dump_file;
843 FILE *stack_reg_dump_file;
845 /* Time accumulators, to count the total time spent in various passes. */
849 int integration_time;
857 int local_alloc_time;
858 int global_alloc_time;
861 int shorten_branch_time;
867 /* Return time used so far, in microseconds. */
877 struct rusage rusage;
882 int proc_system_time;
884 int child_system_time;
896 return (clock() * 1000);
897 #else /* not _WIN32 */
900 return (tms.tms_utime + tms.tms_stime) * (1000000 / HZ);
903 getrusage (0, &rusage);
904 return (rusage.ru_utime.tv_sec * 1000000 + rusage.ru_utime.tv_usec
905 + rusage.ru_stime.tv_sec * 1000000 + rusage.ru_stime.tv_usec);
908 return (vms_times.proc_user_time + vms_times.proc_system_time) * 10000;
914 #define TIMEVAR(VAR, BODY) \
915 do { int otime = get_run_time (); BODY; VAR += get_run_time () - otime; } while (0)
918 print_time (str, total)
923 "time in %s: %d.%06d\n",
924 str, total / 1000000, total % 1000000);
927 /* Count an error or warning. Return 1 if the message should be printed. */
930 count_error (warningp)
933 if (warningp && inhibit_warnings)
936 if (warningp && !warnings_are_errors)
940 static int warning_message = 0;
942 if (warningp && !warning_message)
944 fprintf (stderr, "%s: warnings being treated as errors\n", progname);
953 /* Print a fatal error message. NAME is the text.
954 Also include a system error message based on `errno'. */
957 pfatal_with_name (name)
960 fprintf (stderr, "%s: ", progname);
962 exit (FATAL_EXIT_CODE);
966 fatal_io_error (name)
969 fprintf (stderr, "%s: %s: I/O error\n", progname, name);
970 exit (FATAL_EXIT_CODE);
973 /* Called to give a better error message for a bad insn rather than
974 just calling abort(). */
977 fatal_insn (message, insn)
981 if (!output_bytecode)
987 fflush (asm_out_file);
989 fflush (aux_info_file);
991 fflush (rtl_dump_file);
992 if (jump_opt_dump_file)
993 fflush (jump_opt_dump_file);
995 fflush (cse_dump_file);
997 fflush (loop_dump_file);
999 fflush (cse2_dump_file);
1001 fflush (flow_dump_file);
1002 if (combine_dump_file)
1003 fflush (combine_dump_file);
1004 if (sched_dump_file)
1005 fflush (sched_dump_file);
1006 if (local_reg_dump_file)
1007 fflush (local_reg_dump_file);
1008 if (global_reg_dump_file)
1009 fflush (global_reg_dump_file);
1010 if (sched2_dump_file)
1011 fflush (sched2_dump_file);
1012 if (jump2_opt_dump_file)
1013 fflush (jump2_opt_dump_file);
1014 if (dbr_sched_dump_file)
1015 fflush (dbr_sched_dump_file);
1016 if (stack_reg_dump_file)
1017 fflush (stack_reg_dump_file);
1023 /* Called to give a better error message when we don't have an insn to match
1024 what we are looking for or if the insn's constraints aren't satisfied,
1025 rather than just calling abort(). */
1028 fatal_insn_not_found (insn)
1031 if (INSN_CODE (insn) < 0)
1032 fatal_insn ("internal error--unrecognizable insn:", insn);
1034 fatal_insn ("internal error--insn does not satisfy its constraints:", insn);
1037 /* This is the default decl_printable_name function. */
1040 decl_name (decl, verbosity)
1044 return IDENTIFIER_POINTER (DECL_NAME (decl));
1047 static int need_error_newline;
1049 /* Function of last error message;
1050 more generally, function such that if next error message is in it
1051 then we don't have to mention the function name. */
1052 static tree last_error_function = NULL;
1054 /* Used to detect when input_file_stack has changed since last described. */
1055 static int last_error_tick;
1057 /* Called when the start of a function definition is parsed,
1058 this function prints on stderr the name of the function. */
1061 announce_function (decl)
1066 if (rtl_dump_and_exit)
1067 fprintf (stderr, "%s ", IDENTIFIER_POINTER (DECL_NAME (decl)));
1069 fprintf (stderr, " %s", (*decl_printable_name) (decl, 2));
1071 need_error_newline = 1;
1072 last_error_function = current_function_decl;
1076 /* The default function to print out name of current function that caused
1080 default_print_error_function (file)
1083 if (last_error_function != current_function_decl)
1085 char *kind = "function";
1086 if (current_function_decl != 0
1087 && TREE_CODE (TREE_TYPE (current_function_decl)) == METHOD_TYPE)
1091 fprintf (stderr, "%s: ", file);
1093 if (current_function_decl == NULL)
1094 fprintf (stderr, "At top level:\n");
1097 char *name = (*decl_printable_name) (current_function_decl, 2);
1098 fprintf (stderr, "In %s `%s':\n", kind, name);
1101 last_error_function = current_function_decl;
1105 /* Called by report_error_function to print out function name.
1106 * Default may be overridden by language front-ends. */
1108 void (*print_error_function) PROTO((char *)) = default_print_error_function;
1110 /* Prints out, if necessary, the name of the current function
1111 that caused an error. Called from all error and warning functions. */
1114 report_error_function (file)
1117 struct file_stack *p;
1119 if (need_error_newline)
1121 fprintf (stderr, "\n");
1122 need_error_newline = 0;
1125 (*print_error_function) (file);
1127 if (input_file_stack && input_file_stack->next != 0
1128 && input_file_stack_tick != last_error_tick
1129 && file == input_filename)
1131 fprintf (stderr, "In file included");
1132 for (p = input_file_stack->next; p; p = p->next)
1134 fprintf (stderr, " from %s:%d", p->name, p->line);
1136 fprintf (stderr, ",\n ");
1138 fprintf (stderr, ":\n");
1139 last_error_tick = input_file_stack_tick;
1143 /* Print a message. */
1146 vmessage (prefix, s, ap)
1152 fprintf (stderr, "%s: ", prefix);
1155 vfprintf (stderr, s, ap);
1158 HOST_WIDE_INT v1 = va_arg(ap, HOST_WIDE_INT);
1159 HOST_WIDE_INT v2 = va_arg(ap, HOST_WIDE_INT);
1160 HOST_WIDE_INT v3 = va_arg(ap, HOST_WIDE_INT);
1161 HOST_WIDE_INT v4 = va_arg(ap, HOST_WIDE_INT);
1162 fprintf (stderr, s, v1, v2, v3, v4);
1167 /* Print a message relevant to line LINE of file FILE. */
1170 v_message_with_file_and_line (file, line, prefix, s, ap)
1178 fprintf (stderr, "%s:%d: ", file, line);
1180 fprintf (stderr, "%s: ", progname);
1182 vmessage (prefix, s, ap);
1183 fputc ('\n', stderr);
1186 /* Print a message relevant to the given DECL. */
1189 v_message_with_decl (decl, prefix, s, ap)
1197 fprintf (stderr, "%s:%d: ",
1198 DECL_SOURCE_FILE (decl), DECL_SOURCE_LINE (decl));
1201 fprintf (stderr, "%s: ", prefix);
1203 /* Do magic to get around lack of varargs support for insertion
1204 of arguments into existing list. We know that the decl is first;
1205 we ass_u_me that it will be printed with "%s". */
1207 for (p = s; *p; ++p)
1211 if (*(p + 1) == '%')
1218 if (p > s) /* Print the left-hand substring. */
1220 char fmt[sizeof "%.255s"];
1223 if (width > 255L) width = 255L; /* arbitrary */
1224 sprintf (fmt, "%%.%lds", width);
1225 fprintf (stderr, fmt, s);
1228 if (*p == '%') /* Print the name. */
1230 char *n = (DECL_NAME (decl)
1231 ? (*decl_printable_name) (decl, 2)
1237 if (isalpha (*(p - 1) & 0xFF))
1242 if (*p) /* Print the rest of the message. */
1243 vmessage ((char *)NULL, p, ap);
1245 fputc ('\n', stderr);
1248 /* Figure file and line of the given INSN. */
1251 file_and_line_for_asm (insn, pfile, pline)
1256 rtx body = PATTERN (insn);
1259 /* Find the (or one of the) ASM_OPERANDS in the insn. */
1260 if (GET_CODE (body) == SET && GET_CODE (SET_SRC (body)) == ASM_OPERANDS)
1261 asmop = SET_SRC (body);
1262 else if (GET_CODE (body) == ASM_OPERANDS)
1264 else if (GET_CODE (body) == PARALLEL
1265 && GET_CODE (XVECEXP (body, 0, 0)) == SET)
1266 asmop = SET_SRC (XVECEXP (body, 0, 0));
1267 else if (GET_CODE (body) == PARALLEL
1268 && GET_CODE (XVECEXP (body, 0, 0)) == ASM_OPERANDS)
1269 asmop = XVECEXP (body, 0, 0);
1275 *pfile = ASM_OPERANDS_SOURCE_FILE (asmop);
1276 *pline = ASM_OPERANDS_SOURCE_LINE (asmop);
1280 *pfile = input_filename;
1285 /* Report an error at line LINE of file FILE. */
1288 v_error_with_file_and_line (file, line, s, ap)
1295 report_error_function (file);
1296 v_message_with_file_and_line (file, line, (char *)NULL, s, ap);
1300 error_with_file_and_line VPROTO((char *file, int line, char *s, ...))
1312 file = va_arg (ap, char *);
1313 line = va_arg (ap, int);
1314 s = va_arg (ap, char *);
1317 v_error_with_file_and_line (file, line, s, ap);
1321 /* Report an error at the declaration DECL.
1322 S is a format string which uses %s to substitute the declaration
1323 name; subsequent substitutions are a la printf. */
1326 v_error_with_decl (decl, s, ap)
1332 report_error_function (DECL_SOURCE_FILE (decl));
1333 v_message_with_decl (decl, (char *)NULL, s, ap);
1337 error_with_decl VPROTO((tree decl, char *s, ...))
1348 decl = va_arg (ap, tree);
1349 s = va_arg (ap, char *);
1352 v_error_with_decl (decl, s, ap);
1356 /* Report an error at the line number of the insn INSN.
1357 This is used only when INSN is an `asm' with operands,
1358 and each ASM_OPERANDS records its own source file and line. */
1361 v_error_for_asm (insn, s, ap)
1370 file_and_line_for_asm (insn, &file, &line);
1371 report_error_function (file);
1372 v_message_with_file_and_line (file, line, (char *)NULL, s, ap);
1376 error_for_asm VPROTO((rtx insn, char *s, ...))
1387 insn = va_arg (ap, rtx);
1388 s = va_arg (ap, char *);
1391 v_error_for_asm (insn, s, ap);
1395 /* Report an error at the current line number. */
1402 v_error_with_file_and_line (input_filename, lineno, s, ap);
1406 error VPROTO((char *s, ...))
1416 s = va_arg (ap, char *);
1423 /* Report a fatal error at the current line number. */
1431 exit (FATAL_EXIT_CODE);
1435 fatal VPROTO((char *s, ...))
1445 s = va_arg (ap, char *);
1452 /* Report a warning at line LINE of file FILE. */
1455 v_warning_with_file_and_line (file, line, s, ap)
1461 if (count_error (1))
1463 report_error_function (file);
1464 v_message_with_file_and_line (file, line, "warning", s, ap);
1469 warning_with_file_and_line VPROTO((char *file, int line, char *s, ...))
1481 file = va_arg (ap, char *);
1482 line = va_arg (ap, int);
1483 s = va_arg (ap, char *);
1486 v_warning_with_file_and_line (file, line, s, ap);
1490 /* Report a warning at the declaration DECL.
1491 S is a format string which uses %s to substitute the declaration
1492 name; subsequent substitutions are a la printf. */
1495 v_warning_with_decl (decl, s, ap)
1500 if (count_error (1))
1502 report_error_function (DECL_SOURCE_FILE (decl));
1503 v_message_with_decl (decl, "warning", s, ap);
1508 warning_with_decl VPROTO((tree decl, char *s, ...))
1519 decl = va_arg (ap, tree);
1520 s = va_arg (ap, char *);
1523 v_warning_with_decl (decl, s, ap);
1527 /* Report a warning at the line number of the insn INSN.
1528 This is used only when INSN is an `asm' with operands,
1529 and each ASM_OPERANDS records its own source file and line. */
1532 v_warning_for_asm (insn, s, ap)
1537 if (count_error (1))
1542 file_and_line_for_asm (insn, &file, &line);
1543 report_error_function (file);
1544 v_message_with_file_and_line (file, line, "warning", s, ap);
1549 warning_for_asm VPROTO((rtx insn, char *s, ...))
1560 insn = va_arg (ap, rtx);
1561 s = va_arg (ap, char *);
1564 v_warning_for_asm (insn, s, ap);
1568 /* Report a warning at the current line number. */
1575 v_warning_with_file_and_line (input_filename, lineno, s, ap);
1579 warning VPROTO((char *s, ...))
1589 s = va_arg (ap, char *);
1596 /* These functions issue either warnings or errors depending on
1597 -pedantic-errors. */
1604 if (flag_pedantic_errors)
1611 pedwarn VPROTO((char *s, ...))
1621 s = va_arg (ap, char *);
1629 v_pedwarn_with_decl (decl, s, ap)
1634 /* We don't want -pedantic-errors to cause the compilation to fail from
1635 "errors" in system header files. Sometimes fixincludes can't fix what's
1636 broken (eg: unsigned char bitfields - fixing it may change the alignment
1637 which will cause programs to mysteriously fail because the C library
1638 or kernel uses the original layout). There's no point in issuing a
1639 warning either, it's just unnecessary noise. */
1641 if (! DECL_IN_SYSTEM_HEADER (decl))
1643 if (flag_pedantic_errors)
1644 v_error_with_decl (decl, s, ap);
1646 v_warning_with_decl (decl, s, ap);
1651 pedwarn_with_decl VPROTO((tree decl, char *s, ...))
1662 decl = va_arg (ap, tree);
1663 s = va_arg (ap, char *);
1666 v_pedwarn_with_decl (decl, s, ap);
1671 v_pedwarn_with_file_and_line (file, line, s, ap)
1677 if (flag_pedantic_errors)
1678 v_error_with_file_and_line (file, line, s, ap);
1680 v_warning_with_file_and_line (file, line, s, ap);
1684 pedwarn_with_file_and_line VPROTO((char *file, int line, char *s, ...))
1696 file = va_arg (ap, char *);
1697 line = va_arg (ap, int);
1698 s = va_arg (ap, char *);
1701 v_pedwarn_with_file_and_line (file, line, s, ap);
1705 /* Apologize for not implementing some feature. */
1714 fprintf (stderr, "%s:%d: ", input_filename, lineno);
1716 fprintf (stderr, "%s: ", progname);
1717 vmessage ("sorry, not implemented", s, ap);
1718 fputc ('\n', stderr);
1722 sorry VPROTO((char *s, ...))
1732 s = va_arg (ap, char *);
1739 /* Apologize for not implementing some feature, then quit. */
1742 v_really_sorry (s, ap)
1748 fprintf (stderr, "%s:%d: ", input_filename, lineno);
1750 fprintf (stderr, "%s: ", progname);
1751 vmessage ("sorry, not implemented", s, ap);
1752 fatal (" (fatal)\n");
1756 really_sorry VPROTO((char *s, ...))
1766 s = va_arg (ap, char *);
1769 v_really_sorry (s, ap);
1773 /* More 'friendly' abort that prints the line and file.
1774 config.h can #define abort fancy_abort if you like that sort of thing.
1776 I don't think this is actually a good idea.
1777 Other sorts of crashes will look a certain way.
1778 It is a good thing if crashes from calling abort look the same way.
1784 fatal ("internal gcc abort");
1787 /* This calls abort and is used to avoid problems when abort if a macro.
1788 It is used when we need to pass the address of abort. */
1796 /* When `malloc.c' is compiled with `rcheck' defined,
1797 it calls this function to report clobberage. */
1805 /* Same as `malloc' but report error if no memory available. */
1811 register char *value = (char *) malloc (size);
1813 fatal ("virtual memory exhausted");
1817 /* Same as `realloc' but report error if no memory available. */
1820 xrealloc (ptr, size)
1824 char *result = (char *) realloc (ptr, size);
1826 fatal ("virtual memory exhausted");
1830 /* Same as `strdup' but report error if no memory available. */
1836 register char *result = (char *) malloc (strlen (s) + 1);
1839 fatal ("virtual memory exhausted");
1844 /* Return the logarithm of X, base 2, considering X unsigned,
1845 if X is a power of 2. Otherwise, returns -1.
1847 This should be used via the `exact_log2' macro. */
1851 register unsigned HOST_WIDE_INT x;
1853 register int log = 0;
1854 /* Test for 0 or a power of 2. */
1855 if (x == 0 || x != (x & -x))
1857 while ((x >>= 1) != 0)
1862 /* Given X, an unsigned number, return the largest int Y such that 2**Y <= X.
1863 If X is 0, return -1.
1865 This should be used via the floor_log2 macro. */
1869 register unsigned HOST_WIDE_INT x;
1871 register int log = -1;
1878 static int float_handler_set;
1880 jmp_buf float_handler;
1882 /* Signals actually come here. */
1885 float_signal (signo)
1886 /* If this is missing, some compilers complain. */
1889 if (float_handled == 0)
1891 #if defined (USG) || defined (hpux)
1892 signal (SIGFPE, float_signal); /* re-enable the signal catcher */
1895 signal (SIGFPE, float_signal);
1896 longjmp (float_handler, 1);
1899 /* Specify where to longjmp to when a floating arithmetic error happens.
1900 If HANDLER is 0, it means don't handle the errors any more. */
1903 set_float_handler (handler)
1906 float_handled = (handler != 0);
1908 bcopy ((char *) handler, (char *) float_handler, sizeof (float_handler));
1910 if (float_handled && ! float_handler_set)
1912 signal (SIGFPE, float_signal);
1913 float_handler_set = 1;
1917 /* Specify, in HANDLER, where to longjmp to when a floating arithmetic
1918 error happens, pushing the previous specification into OLD_HANDLER.
1919 Return an indication of whether there was a previous handler in effect. */
1922 push_float_handler (handler, old_handler)
1923 jmp_buf handler, old_handler;
1925 int was_handled = float_handled;
1929 bcopy ((char *) float_handler, (char *) old_handler,
1930 sizeof (float_handler));
1932 bcopy ((char *) handler, (char *) float_handler, sizeof (float_handler));
1936 /* Restore the previous specification of whether and where to longjmp to
1937 when a floating arithmetic error happens. */
1940 pop_float_handler (handled, handler)
1944 float_handled = handled;
1946 bcopy ((char *) handler, (char *) float_handler, sizeof (float_handler));
1949 /* Handler for SIGPIPE. */
1953 /* If this is missing, some compilers complain. */
1956 fatal ("output pipe has been closed");
1959 /* Strip off a legitimate source ending from the input string NAME of
1960 length LEN. Rather than having to know the names used by all of
1961 our front ends, we strip off an ending of a period followed by one,
1962 two, or three characters. */
1965 strip_off_ending (name, len)
1969 if (len > 2 && name[len - 2] == '.')
1970 name[len - 2] = '\0';
1971 else if (len > 3 && name[len - 3] == '.')
1972 name[len - 3] = '\0';
1973 else if (len > 4 && name[len - 4] == '.')
1974 name[len - 4] = '\0';
1977 /* Output a quoted string. */
1980 output_quoted_string (asm_file, string)
1986 putc ('\"', asm_file);
1987 while ((c = *string++) != 0)
1989 if (c == '\"' || c == '\\')
1990 putc ('\\', asm_file);
1993 putc ('\"', asm_file);
1996 /* Output a file name in the form wanted by System V. */
1999 output_file_directive (asm_file, input_name)
2003 int len = strlen (input_name);
2004 char *na = input_name + len;
2006 /* NA gets INPUT_NAME sans directory names. */
2007 while (na > input_name)
2014 #ifdef ASM_OUTPUT_MAIN_SOURCE_FILENAME
2015 ASM_OUTPUT_MAIN_SOURCE_FILENAME (asm_file, na);
2017 #ifdef ASM_OUTPUT_SOURCE_FILENAME
2018 ASM_OUTPUT_SOURCE_FILENAME (asm_file, na);
2020 fprintf (asm_file, "\t.file\t");
2021 output_quoted_string (asm_file, na);
2022 fputc ('\n', asm_file);
2027 /* Routine to build language identifier for object file. */
2030 output_lang_identify (asm_out_file)
2033 int len = strlen (lang_identify ()) + sizeof ("__gnu_compiled_") + 1;
2034 char *s = (char *) alloca (len);
2035 sprintf (s, "__gnu_compiled_%s", lang_identify ());
2036 ASM_OUTPUT_LABEL (asm_out_file, s);
2039 /* Routine to open a dump file. */
2042 open_dump_file (base_name, suffix)
2047 char *dumpname = (char *) alloca (strlen (base_name) + strlen (suffix) + 1);
2049 strcpy (dumpname, base_name);
2050 strcat (dumpname, suffix);
2051 f = fopen (dumpname, "w");
2053 pfatal_with_name (dumpname);
2057 /* Compile an entire file of output from cpp, named NAME.
2058 Write a file of assembly output and various debugging dumps. */
2067 int name_specified = name != 0;
2069 if (dump_base_name == 0)
2070 dump_base_name = name ? name : "gccdump";
2074 integration_time = 0;
2082 local_alloc_time = 0;
2083 global_alloc_time = 0;
2086 shorten_branch_time = 0;
2092 /* Open input file. */
2094 if (name == 0 || !strcmp (name, "-"))
2100 finput = fopen (name, "r");
2102 pfatal_with_name (name);
2104 #ifdef IO_BUFFER_SIZE
2105 setvbuf (finput, (char *) xmalloc (IO_BUFFER_SIZE), _IOFBF, IO_BUFFER_SIZE);
2108 /* Initialize data in various passes. */
2113 /* Some of these really don't need to be called when generating bytecode,
2114 but the options would have to be parsed first to know that. -bson */
2116 init_emit_once (debug_info_level == DINFO_LEVEL_NORMAL
2117 || debug_info_level == DINFO_LEVEL_VERBOSE);
2119 init_decl_processing ();
2127 if (flag_caller_saves)
2128 init_caller_save ();
2130 /* If auxiliary info generation is desired, open the output file.
2131 This goes in the same directory as the source file--unlike
2132 all the other output files. */
2133 if (flag_gen_aux_info)
2135 aux_info_file = fopen (aux_info_file_name, "w");
2136 if (aux_info_file == 0)
2137 pfatal_with_name (aux_info_file_name);
2140 /* If rtl dump desired, open the output file. */
2142 rtl_dump_file = open_dump_file (dump_base_name, ".rtl");
2144 /* If jump_opt dump desired, open the output file. */
2146 jump_opt_dump_file = open_dump_file (dump_base_name, ".jump");
2148 /* If cse dump desired, open the output file. */
2150 cse_dump_file = open_dump_file (dump_base_name, ".cse");
2152 /* If loop dump desired, open the output file. */
2154 loop_dump_file = open_dump_file (dump_base_name, ".loop");
2156 /* If cse2 dump desired, open the output file. */
2158 cse2_dump_file = open_dump_file (dump_base_name, ".cse2");
2160 /* If flow dump desired, open the output file. */
2162 flow_dump_file = open_dump_file (dump_base_name, ".flow");
2164 /* If combine dump desired, open the output file. */
2166 combine_dump_file = open_dump_file (dump_base_name, ".combine");
2168 /* If scheduling dump desired, open the output file. */
2170 sched_dump_file = open_dump_file (dump_base_name, ".sched");
2172 /* If local_reg dump desired, open the output file. */
2174 local_reg_dump_file = open_dump_file (dump_base_name, ".lreg");
2176 /* If global_reg dump desired, open the output file. */
2177 if (global_reg_dump)
2178 global_reg_dump_file = open_dump_file (dump_base_name, ".greg");
2180 /* If 2nd scheduling dump desired, open the output file. */
2182 sched2_dump_file = open_dump_file (dump_base_name, ".sched2");
2184 /* If jump2_opt dump desired, open the output file. */
2186 jump2_opt_dump_file = open_dump_file (dump_base_name, ".jump2");
2188 /* If dbr_sched dump desired, open the output file. */
2190 dbr_sched_dump_file = open_dump_file (dump_base_name, ".dbr");
2194 /* If stack_reg dump desired, open the output file. */
2196 stack_reg_dump_file = open_dump_file (dump_base_name, ".stack");
2200 /* Open assembler code output file. */
2202 if (! name_specified && asm_file_name == 0)
2203 asm_out_file = stdout;
2206 int len = strlen (dump_base_name);
2207 register char *dumpname = (char *) xmalloc (len + 6);
2208 strcpy (dumpname, dump_base_name);
2209 strip_off_ending (dumpname, len);
2210 strcat (dumpname, ".s");
2211 if (asm_file_name == 0)
2213 asm_file_name = (char *) xmalloc (strlen (dumpname) + 1);
2214 strcpy (asm_file_name, dumpname);
2216 if (!strcmp (asm_file_name, "-"))
2217 asm_out_file = stdout;
2219 asm_out_file = fopen (asm_file_name, "w");
2220 if (asm_out_file == 0)
2221 pfatal_with_name (asm_file_name);
2224 #ifdef IO_BUFFER_SIZE
2225 setvbuf (asm_out_file, (char *) xmalloc (IO_BUFFER_SIZE),
2226 _IOFBF, IO_BUFFER_SIZE);
2229 input_filename = name;
2231 /* Put an entry on the input file stack for the main input file. */
2233 = (struct file_stack *) xmalloc (sizeof (struct file_stack));
2234 input_file_stack->next = 0;
2235 input_file_stack->name = input_filename;
2237 /* Perform language-specific initialization.
2238 This may set main_input_filename. */
2241 /* If the input doesn't start with a #line, use the input name
2242 as the official input file name. */
2243 if (main_input_filename == 0)
2244 main_input_filename = name;
2246 if (!output_bytecode)
2248 ASM_FILE_START (asm_out_file);
2250 #ifdef ASM_COMMENT_START
2251 if (flag_verbose_asm)
2253 /* Print the list of options in effect. */
2254 print_version (asm_out_file, ASM_COMMENT_START);
2255 print_switch_values (asm_out_file, 0, MAX_LINE,
2256 ASM_COMMENT_START, " ", "\n");
2257 /* Add a blank line here so it appears in assembler output but not
2259 fprintf (asm_out_file, "\n");
2264 /* Output something to inform GDB that this compilation was by GCC. Also
2265 serves to tell GDB file consists of bytecodes. */
2266 if (output_bytecode)
2267 fprintf (asm_out_file, "bc_gcc2_compiled.:\n");
2270 #ifndef ASM_IDENTIFY_GCC
2271 fprintf (asm_out_file, "gcc2_compiled.:\n");
2273 ASM_IDENTIFY_GCC (asm_out_file);
2277 /* Output something to identify which front-end produced this file. */
2278 #ifdef ASM_IDENTIFY_LANGUAGE
2279 ASM_IDENTIFY_LANGUAGE (asm_out_file);
2282 #ifndef ASM_OUTPUT_SECTION_NAME
2283 if (flag_function_sections)
2285 warning ("-ffunction-sections not supported for this target.");
2286 flag_function_sections = 0;
2290 if (flag_function_sections
2291 && (profile_flag || profile_block_flag))
2293 warning ("-ffunction-sections disabled; it makes profiling impossible.");
2294 flag_function_sections = 0;
2297 if (flag_function_sections && write_symbols != NO_DEBUG)
2298 warning ("-ffunction-sections may affect debugging on some targets.");
2300 if (output_bytecode)
2302 if (profile_flag || profile_block_flag)
2303 error ("profiling not supported in bytecode compilation");
2307 /* ??? Note: There used to be a conditional here
2308 to call assemble_zeros without fail if DBX_DEBUGGING_INFO is defined.
2309 This was to guarantee separation between gcc_compiled. and
2310 the first function, for the sake of dbx on Suns.
2311 However, having the extra zero here confused the Emacs
2312 code for unexec, and might confuse other programs too.
2313 Therefore, I took out that change.
2314 In future versions we should find another way to solve
2315 that dbx problem. -- rms, 23 May 93. */
2317 /* Don't let the first function fall at the same address
2318 as gcc_compiled., if profiling. */
2319 if (profile_flag || profile_block_flag)
2320 assemble_zeros (UNITS_PER_WORD);
2323 /* If dbx symbol table desired, initialize writing it
2324 and output the predefined types. */
2325 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
2326 if (write_symbols == DBX_DEBUG || write_symbols == XCOFF_DEBUG)
2327 TIMEVAR (symout_time, dbxout_init (asm_out_file, main_input_filename,
2330 #ifdef SDB_DEBUGGING_INFO
2331 if (write_symbols == SDB_DEBUG)
2332 TIMEVAR (symout_time, sdbout_init (asm_out_file, main_input_filename,
2335 #ifdef DWARF_DEBUGGING_INFO
2336 if (write_symbols == DWARF_DEBUG)
2337 TIMEVAR (symout_time, dwarfout_init (asm_out_file, main_input_filename));
2339 #ifdef DWARF2_DEBUGGING_INFO
2340 if (write_symbols == DWARF2_DEBUG)
2341 TIMEVAR (symout_time, dwarf2out_init (asm_out_file, main_input_filename));
2344 /* Initialize yet another pass. */
2346 if (!output_bytecode)
2347 init_final (main_input_filename);
2349 start_time = get_run_time ();
2351 /* Call the parser, which parses the entire file
2352 (calling rest_of_compilation for each function). */
2354 if (yyparse () != 0)
2356 if (errorcount == 0)
2357 fprintf (stderr, "Errors detected in input file (your bison.simple is out of date)");
2359 /* In case there were missing closebraces,
2360 get us back to the global binding level. */
2361 while (! global_bindings_p ())
2365 /* Compilation is now finished except for writing
2366 what's left of the symbol table output. */
2368 parse_time += get_run_time () - start_time;
2370 parse_time -= integration_time;
2371 parse_time -= varconst_time;
2373 globals = getdecls ();
2375 /* Really define vars that have had only a tentative definition.
2376 Really output inline functions that must actually be callable
2377 and have not been output so far. */
2380 int len = list_length (globals);
2381 tree *vec = (tree *) alloca (sizeof (tree) * len);
2386 /* Process the decls in reverse order--earliest first.
2387 Put them into VEC from back to front, then take out from front. */
2389 for (i = 0, decl = globals; i < len; i++, decl = TREE_CHAIN (decl))
2390 vec[len - i - 1] = decl;
2392 for (i = 0; i < len; i++)
2396 /* We're not deferring this any longer. */
2397 DECL_DEFER_OUTPUT (decl) = 0;
2399 if (TREE_CODE (decl) == VAR_DECL && DECL_SIZE (decl) == 0
2400 && incomplete_decl_finalize_hook != 0)
2401 (*incomplete_decl_finalize_hook) (decl);
2404 /* Now emit any global variables or functions that we have been putting
2405 off. We need to loop in case one of the things emitted here
2406 references another one which comes earlier in the list. */
2410 for (i = 0; i < len; i++)
2414 if (TREE_ASM_WRITTEN (decl) || DECL_EXTERNAL (decl))
2417 /* Don't write out static consts, unless we still need them.
2419 We also keep static consts if not optimizing (for debugging),
2420 unless the user specified -fno-keep-static-consts.
2421 ??? They might be better written into the debug information.
2422 This is possible when using DWARF.
2424 A language processor that wants static constants to be always
2425 written out (even if it is not used) is responsible for
2426 calling rest_of_decl_compilation itself. E.g. the C front-end
2427 calls rest_of_decl_compilation from finish_decl.
2428 One motivation for this is that is conventional in some
2429 environments to write things like:
2430 static const char rcsid[] = "... version string ...";
2431 intending to force the string to be in the executable.
2433 A language processor that would prefer to have unneeded
2434 static constants "optimized away" would just defer writing
2435 them out until here. E.g. C++ does this, because static
2436 constants are often defined in header files.
2438 ??? A tempting alternative (for both C and C++) would be
2439 to force a constant to be written if and only if it is
2440 defined in a main file, as opposed to an include file. */
2442 if (TREE_CODE (decl) == VAR_DECL && TREE_STATIC (decl)
2443 && (! TREE_READONLY (decl)
2444 || TREE_PUBLIC (decl)
2445 || (!optimize && flag_keep_static_consts)
2446 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl))))
2449 rest_of_decl_compilation (decl, NULL_PTR, 1, 1);
2452 if (TREE_CODE (decl) == FUNCTION_DECL
2453 && DECL_INITIAL (decl) != 0
2454 && DECL_SAVED_INSNS (decl) != 0
2455 && (flag_keep_inline_functions
2456 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl))))
2459 temporary_allocation ();
2460 output_inline_function (decl);
2461 permanent_allocation (1);
2466 /* Now that all possible functions have been output, we can dump
2467 the exception table. */
2469 if (exception_table_p ())
2470 output_exception_table ();
2472 for (i = 0; i < len; i++)
2476 if (TREE_CODE (decl) == VAR_DECL && TREE_STATIC (decl)
2477 && ! TREE_ASM_WRITTEN (decl))
2478 /* Cancel the RTL for this decl so that, if debugging info
2479 output for global variables is still to come,
2480 this one will be omitted. */
2481 DECL_RTL (decl) = NULL;
2483 /* Warn about any function
2484 declared static but not defined.
2485 We don't warn about variables,
2486 because many programs have static variables
2487 that exist only to get some text into the object file. */
2488 if (TREE_CODE (decl) == FUNCTION_DECL
2490 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl)))
2491 && DECL_INITIAL (decl) == 0
2492 && DECL_EXTERNAL (decl)
2493 && ! DECL_ARTIFICIAL (decl)
2494 && ! TREE_PUBLIC (decl))
2496 pedwarn_with_decl (decl,
2497 "`%s' declared `static' but never defined");
2498 /* This symbol is effectively an "extern" declaration now. */
2499 TREE_PUBLIC (decl) = 1;
2500 assemble_external (decl);
2503 /* Warn about static fns or vars defined but not used,
2504 but not about inline functions or static consts
2505 since defining those in header files is normal practice. */
2507 && ((TREE_CODE (decl) == FUNCTION_DECL && ! DECL_INLINE (decl))
2508 || (TREE_CODE (decl) == VAR_DECL && ! TREE_READONLY (decl)))
2509 && ! DECL_IN_SYSTEM_HEADER (decl)
2510 && ! DECL_EXTERNAL (decl)
2511 && ! TREE_PUBLIC (decl)
2512 && ! TREE_USED (decl)
2513 && (TREE_CODE (decl) == FUNCTION_DECL || ! DECL_REGISTER (decl))
2514 /* The TREE_USED bit for file-scope decls
2515 is kept in the identifier, to handle multiple
2516 external decls in different scopes. */
2517 && ! TREE_USED (DECL_NAME (decl)))
2518 warning_with_decl (decl, "`%s' defined but not used");
2520 #ifdef SDB_DEBUGGING_INFO
2521 /* The COFF linker can move initialized global vars to the end.
2522 And that can screw up the symbol ordering.
2523 By putting the symbols in that order to begin with,
2524 we avoid a problem. mcsun!unido!fauern!tumuc!pes@uunet.uu.net. */
2525 if (write_symbols == SDB_DEBUG && TREE_CODE (decl) == VAR_DECL
2526 && TREE_PUBLIC (decl) && DECL_INITIAL (decl)
2527 && ! DECL_EXTERNAL (decl)
2528 && DECL_RTL (decl) != 0)
2529 TIMEVAR (symout_time, sdbout_symbol (decl, 0));
2531 /* Output COFF information for non-global
2532 file-scope initialized variables. */
2533 if (write_symbols == SDB_DEBUG
2534 && TREE_CODE (decl) == VAR_DECL
2535 && DECL_INITIAL (decl)
2536 && ! DECL_EXTERNAL (decl)
2537 && DECL_RTL (decl) != 0
2538 && GET_CODE (DECL_RTL (decl)) == MEM)
2539 TIMEVAR (symout_time, sdbout_toplevel_data (decl));
2540 #endif /* SDB_DEBUGGING_INFO */
2541 #ifdef DWARF_DEBUGGING_INFO
2542 /* Output DWARF information for file-scope tentative data object
2543 declarations, file-scope (extern) function declarations (which
2544 had no corresponding body) and file-scope tagged type declarations
2545 and definitions which have not yet been forced out. */
2547 if (write_symbols == DWARF_DEBUG
2548 && (TREE_CODE (decl) != FUNCTION_DECL || !DECL_INITIAL (decl)))
2549 TIMEVAR (symout_time, dwarfout_file_scope_decl (decl, 1));
2551 #ifdef DWARF2_DEBUGGING_INFO
2552 /* Output DWARF2 information for file-scope tentative data object
2553 declarations, file-scope (extern) function declarations (which
2554 had no corresponding body) and file-scope tagged type declarations
2555 and definitions which have not yet been forced out. */
2557 if (write_symbols == DWARF2_DEBUG
2558 && (TREE_CODE (decl) != FUNCTION_DECL || !DECL_INITIAL (decl)))
2559 TIMEVAR (symout_time, dwarf2out_decl (decl));
2564 /* Write out any pending weak symbol declarations. */
2568 /* Do dbx symbols */
2569 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
2570 if (write_symbols == DBX_DEBUG || write_symbols == XCOFF_DEBUG)
2571 TIMEVAR (symout_time,
2573 dbxout_finish (asm_out_file, main_input_filename);
2577 #ifdef DWARF_DEBUGGING_INFO
2578 if (write_symbols == DWARF_DEBUG)
2579 TIMEVAR (symout_time,
2585 #ifdef DWARF2_DEBUGGING_INFO
2586 if (write_symbols == DWARF2_DEBUG)
2587 TIMEVAR (symout_time,
2589 dwarf2out_finish ();
2593 /* Output some stuff at end of file if nec. */
2595 if (!output_bytecode)
2597 end_final (main_input_filename);
2600 ASM_FILE_END (asm_out_file);
2604 /* Language-specific end of compilation actions. */
2608 if (output_bytecode)
2609 bc_write_file (asm_out_file);
2611 /* Close the dump files. */
2613 if (flag_gen_aux_info)
2615 fclose (aux_info_file);
2617 unlink (aux_info_file_name);
2621 fclose (rtl_dump_file);
2624 fclose (jump_opt_dump_file);
2627 fclose (cse_dump_file);
2630 fclose (loop_dump_file);
2633 fclose (cse2_dump_file);
2636 fclose (flow_dump_file);
2640 dump_combine_total_stats (combine_dump_file);
2641 fclose (combine_dump_file);
2645 fclose (sched_dump_file);
2648 fclose (local_reg_dump_file);
2650 if (global_reg_dump)
2651 fclose (global_reg_dump_file);
2654 fclose (sched2_dump_file);
2657 fclose (jump2_opt_dump_file);
2660 fclose (dbr_sched_dump_file);
2664 fclose (stack_reg_dump_file);
2667 /* Close non-debugging input and output files. Take special care to note
2668 whether fclose returns an error, since the pages might still be on the
2669 buffer chain while the file is open. */
2672 if (ferror (asm_out_file) != 0 || fclose (asm_out_file) != 0)
2673 fatal_io_error (asm_file_name);
2675 /* Print the times. */
2679 fprintf (stderr,"\n");
2680 print_time ("parse", parse_time);
2682 if (!output_bytecode)
2684 print_time ("integration", integration_time);
2685 print_time ("jump", jump_time);
2686 print_time ("cse", cse_time);
2687 print_time ("loop", loop_time);
2688 print_time ("cse2", cse2_time);
2689 print_time ("flow", flow_time);
2690 print_time ("combine", combine_time);
2691 print_time ("sched", sched_time);
2692 print_time ("local-alloc", local_alloc_time);
2693 print_time ("global-alloc", global_alloc_time);
2694 print_time ("sched2", sched2_time);
2695 print_time ("dbranch", dbr_sched_time);
2696 print_time ("shorten-branch", shorten_branch_time);
2697 print_time ("stack-reg", stack_reg_time);
2698 print_time ("final", final_time);
2699 print_time ("varconst", varconst_time);
2700 print_time ("symout", symout_time);
2701 print_time ("dump", dump_time);
2706 /* This is called from various places for FUNCTION_DECL, VAR_DECL,
2707 and TYPE_DECL nodes.
2709 This does nothing for local (non-static) variables.
2710 Otherwise, it sets up the RTL and outputs any assembler code
2711 (label definition, storage allocation and initialization).
2713 DECL is the declaration. If ASMSPEC is nonzero, it specifies
2714 the assembler symbol name to be used. TOP_LEVEL is nonzero
2715 if this declaration is not within a function. */
2718 rest_of_decl_compilation (decl, asmspec, top_level, at_end)
2724 /* Declarations of variables, and of functions defined elsewhere. */
2726 /* The most obvious approach, to put an #ifndef around where
2727 this macro is used, doesn't work since it's inside a macro call. */
2728 #ifndef ASM_FINISH_DECLARE_OBJECT
2729 #define ASM_FINISH_DECLARE_OBJECT(FILE, DECL, TOP, END)
2732 /* Forward declarations for nested functions are not "external",
2733 but we need to treat them as if they were. */
2734 if (TREE_STATIC (decl) || DECL_EXTERNAL (decl)
2735 || TREE_CODE (decl) == FUNCTION_DECL)
2736 TIMEVAR (varconst_time,
2738 make_decl_rtl (decl, asmspec, top_level);
2739 /* Initialized extern variable exists to be replaced
2740 with its value, or represents something that will be
2741 output in another file. */
2742 if (! (TREE_CODE (decl) == VAR_DECL
2743 && DECL_EXTERNAL (decl) && TREE_READONLY (decl)
2744 && DECL_INITIAL (decl) != 0
2745 && DECL_INITIAL (decl) != error_mark_node))
2746 /* Don't output anything
2747 when a tentative file-scope definition is seen.
2748 But at end of compilation, do output code for them. */
2749 if (! (! at_end && top_level
2750 && (DECL_INITIAL (decl) == 0
2751 || DECL_INITIAL (decl) == error_mark_node)))
2752 assemble_variable (decl, top_level, at_end, 0);
2753 if (!output_bytecode
2754 && decl == last_assemble_variable_decl)
2756 ASM_FINISH_DECLARE_OBJECT (asm_out_file, decl,
2760 else if (DECL_REGISTER (decl) && asmspec != 0)
2762 if (decode_reg_name (asmspec) >= 0)
2764 DECL_RTL (decl) = 0;
2765 make_decl_rtl (decl, asmspec, top_level);
2768 error ("invalid register name `%s' for register variable", asmspec);
2770 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
2771 else if ((write_symbols == DBX_DEBUG || write_symbols == XCOFF_DEBUG)
2772 && TREE_CODE (decl) == TYPE_DECL)
2773 TIMEVAR (symout_time, dbxout_symbol (decl, 0));
2775 #ifdef SDB_DEBUGGING_INFO
2776 else if (write_symbols == SDB_DEBUG && top_level
2777 && TREE_CODE (decl) == TYPE_DECL)
2778 TIMEVAR (symout_time, sdbout_symbol (decl, 0));
2782 /* Called after finishing a record, union or enumeral type. */
2785 rest_of_type_compilation (type, toplev)
2789 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
2790 if (write_symbols == DBX_DEBUG || write_symbols == XCOFF_DEBUG)
2791 TIMEVAR (symout_time, dbxout_symbol (TYPE_STUB_DECL (type), !toplev));
2793 #ifdef SDB_DEBUGGING_INFO
2794 if (write_symbols == SDB_DEBUG)
2795 TIMEVAR (symout_time, sdbout_symbol (TYPE_STUB_DECL (type), !toplev));
2799 /* This is called from finish_function (within yyparse)
2800 after each top-level definition is parsed.
2801 It is supposed to compile that function or variable
2802 and output the assembler code for it.
2803 After we return, the tree storage is freed. */
2806 rest_of_compilation (decl)
2810 int start_time = get_run_time ();
2812 /* Nonzero if we have saved the original DECL_INITIAL of the function,
2813 to be restored after we finish compiling the function
2814 (for use when compiling inline calls to this function). */
2815 tree saved_block_tree = 0;
2816 /* Likewise, for DECL_ARGUMENTS. */
2817 tree saved_arguments = 0;
2820 if (output_bytecode)
2823 /* If we are reconsidering an inline function
2824 at the end of compilation, skip the stuff for making it inline. */
2826 if (DECL_SAVED_INSNS (decl) == 0)
2831 /* If requested, consider whether to make this function inline. */
2832 if (DECL_INLINE (decl) || flag_inline_functions)
2833 TIMEVAR (integration_time,
2835 lose = function_cannot_inline_p (decl);
2836 if (lose || ! optimize)
2838 if (warn_inline && DECL_INLINE (decl))
2839 warning_with_decl (decl, lose);
2840 DECL_ABSTRACT_ORIGIN (decl) = 0;
2841 /* Don't really compile an extern inline function.
2842 If we can't make it inline, pretend
2843 it was only declared. */
2844 if (DECL_EXTERNAL (decl))
2846 DECL_INITIAL (decl) = 0;
2847 goto exit_rest_of_compilation;
2851 /* ??? Note that this has the effect of making it look
2852 like "inline" was specified for a function if we choose
2853 to inline it. This isn't quite right, but it's
2854 probably not worth the trouble to fix. */
2855 inlineable = DECL_INLINE (decl) = 1;
2858 insns = get_insns ();
2860 /* Dump the rtl code if we are dumping rtl. */
2865 fprintf (rtl_dump_file, "\n;; Function %s\n\n",
2866 IDENTIFIER_POINTER (DECL_NAME (decl)));
2867 if (DECL_SAVED_INSNS (decl))
2868 fprintf (rtl_dump_file, ";; (integrable)\n\n");
2869 print_rtl (rtl_dump_file, insns);
2870 fflush (rtl_dump_file);
2873 /* If function is inline, and we don't yet know whether to
2874 compile it by itself, defer decision till end of compilation.
2875 finish_compilation will call rest_of_compilation again
2876 for those functions that need to be output. Also defer those
2877 functions that we are supposed to defer. We cannot defer
2878 functions containing nested functions since the nested function
2879 data is in our non-saved obstack. */
2881 if (! current_function_contains_functions
2882 && (DECL_DEFER_OUTPUT (decl)
2883 || (DECL_INLINE (decl)
2884 && ((! TREE_PUBLIC (decl) && ! TREE_ADDRESSABLE (decl)
2885 && ! flag_keep_inline_functions)
2886 || DECL_EXTERNAL (decl)))))
2888 DECL_DEFER_OUTPUT (decl) = 1;
2890 /* If -Wreturn-type, we have to do a bit of compilation. */
2891 if (! warn_return_type)
2893 #ifdef DWARF_DEBUGGING_INFO
2894 /* Generate the DWARF info for the "abstract" instance
2895 of a function which we may later generate inlined and/or
2896 out-of-line instances of. */
2897 if (write_symbols == DWARF_DEBUG)
2899 set_decl_abstract_flags (decl, 1);
2900 TIMEVAR (symout_time, dwarfout_file_scope_decl (decl, 0));
2901 set_decl_abstract_flags (decl, 0);
2904 #ifdef DWARF2_DEBUGGING_INFO
2905 /* Generate the DWARF2 info for the "abstract" instance
2906 of a function which we may later generate inlined and/or
2907 out-of-line instances of. */
2908 if (write_symbols == DWARF2_DEBUG)
2910 set_decl_abstract_flags (decl, 1);
2911 TIMEVAR (symout_time, dwarf2out_decl (decl));
2912 set_decl_abstract_flags (decl, 0);
2915 TIMEVAR (integration_time, save_for_inline_nocopy (decl));
2916 RTX_INTEGRATED_P (DECL_SAVED_INSNS (decl)) = inlineable;
2917 goto exit_rest_of_compilation;
2921 /* If we have to compile the function now, save its rtl and subdecls
2922 so that its compilation will not affect what others get. */
2923 if (inlineable || DECL_DEFER_OUTPUT (decl))
2925 #ifdef DWARF_DEBUGGING_INFO
2926 /* Generate the DWARF info for the "abstract" instance of
2927 a function which we will generate an out-of-line instance
2928 of almost immediately (and which we may also later generate
2929 various inlined instances of). */
2930 if (write_symbols == DWARF_DEBUG)
2932 set_decl_abstract_flags (decl, 1);
2933 TIMEVAR (symout_time, dwarfout_file_scope_decl (decl, 0));
2934 set_decl_abstract_flags (decl, 0);
2937 #ifdef DWARF2_DEBUGGING_INFO
2938 /* Generate the DWARF2 info for the "abstract" instance of
2939 a function which we will generate an out-of-line instance
2940 of almost immediately (and which we may also later generate
2941 various inlined instances of). */
2942 if (write_symbols == DWARF2_DEBUG)
2944 set_decl_abstract_flags (decl, 1);
2945 TIMEVAR (symout_time, dwarf2out_decl (decl));
2946 set_decl_abstract_flags (decl, 0);
2949 saved_block_tree = DECL_INITIAL (decl);
2950 saved_arguments = DECL_ARGUMENTS (decl);
2951 TIMEVAR (integration_time, save_for_inline_copying (decl));
2952 RTX_INTEGRATED_P (DECL_SAVED_INSNS (decl)) = inlineable;
2955 /* If specified extern inline but we aren't inlining it, we are
2957 if (DECL_INLINE (decl) && DECL_EXTERNAL (decl))
2958 goto exit_rest_of_compilation;
2961 if (! DECL_DEFER_OUTPUT (decl))
2962 TREE_ASM_WRITTEN (decl) = 1;
2964 /* Now that integrate will no longer see our rtl, we need not distinguish
2965 between the return value of this function and the return value of called
2967 rtx_equal_function_value_matters = 0;
2969 /* Don't return yet if -Wreturn-type; we need to do jump_optimize. */
2970 if ((rtl_dump_and_exit || flag_syntax_only) && !warn_return_type)
2972 goto exit_rest_of_compilation;
2975 /* Add an unwinder for exception handling, if needed.
2976 This must be done before we finalize PIC code. */
2980 /* If we are doing position-independent code generation, now
2981 is the time to output special prologues and epilogues.
2982 We do not want to do this earlier, because it just clutters
2983 up inline functions with meaningless insns. */
2988 /* From now on, allocate rtl in current_obstack, not in saveable_obstack.
2989 Note that that may have been done above, in save_for_inline_copying.
2990 The call to resume_temporary_allocation near the end of this function
2991 goes back to the usual state of affairs. This must be done after
2992 we've built up any unwinders for exception handling, and done
2993 the FINALIZE_PIC work, if necessary. */
2995 rtl_in_current_obstack ();
2997 insns = get_insns ();
2999 /* Copy any shared structure that should not be shared. */
3001 unshare_all_rtl (insns);
3003 /* Instantiate all virtual registers. */
3005 instantiate_virtual_regs (current_function_decl, get_insns ());
3007 /* See if we have allocated stack slots that are not directly addressable.
3008 If so, scan all the insns and create explicit address computation
3009 for all references to such slots. */
3010 /* fixup_stack_slots (); */
3012 /* Find all the EH handlers. */
3013 find_exception_handler_labels ();
3015 /* Always do one jump optimization pass to ensure that JUMP_LABEL fields
3016 are initialized and to compute whether control can drop off the end
3018 TIMEVAR (jump_time, reg_scan (insns, max_reg_num (), 0));
3019 TIMEVAR (jump_time, jump_optimize (insns, 0, 0, 1));
3021 /* Now is when we stop if -fsyntax-only and -Wreturn-type. */
3022 if (rtl_dump_and_exit || flag_syntax_only || DECL_DEFER_OUTPUT (decl))
3023 goto exit_rest_of_compilation;
3025 /* Dump rtl code after jump, if we are doing that. */
3030 fprintf (jump_opt_dump_file, "\n;; Function %s\n\n",
3031 IDENTIFIER_POINTER (DECL_NAME (decl)));
3032 print_rtl (jump_opt_dump_file, insns);
3033 fflush (jump_opt_dump_file);
3036 /* Perform common subexpression elimination.
3037 Nonzero value from `cse_main' means that jumps were simplified
3038 and some code may now be unreachable, so do
3039 jump optimization again. */
3044 fprintf (cse_dump_file, "\n;; Function %s\n\n",
3045 IDENTIFIER_POINTER (DECL_NAME (decl)));
3050 TIMEVAR (cse_time, reg_scan (insns, max_reg_num (), 1));
3052 if (flag_thread_jumps)
3053 /* Hacks by tiemann & kenner. */
3054 TIMEVAR (jump_time, thread_jumps (insns, max_reg_num (), 1));
3056 TIMEVAR (cse_time, tem = cse_main (insns, max_reg_num (),
3058 TIMEVAR (cse_time, delete_dead_from_cse (insns, max_reg_num ()));
3060 if (tem || optimize > 1)
3061 TIMEVAR (jump_time, jump_optimize (insns, 0, 0, 0));
3064 /* Dump rtl code after cse, if we are doing that. */
3069 print_rtl (cse_dump_file, insns);
3070 fflush (cse_dump_file);
3076 fprintf (loop_dump_file, "\n;; Function %s\n\n",
3077 IDENTIFIER_POINTER (DECL_NAME (decl)));
3080 /* Move constant computations out of loops. */
3086 loop_optimize (insns, loop_dump_file);
3090 /* Dump rtl code after loop opt, if we are doing that. */
3095 print_rtl (loop_dump_file, insns);
3096 fflush (loop_dump_file);
3102 fprintf (cse2_dump_file, "\n;; Function %s\n\n",
3103 IDENTIFIER_POINTER (DECL_NAME (decl)));
3106 if (optimize > 0 && flag_rerun_cse_after_loop)
3108 /* Running another jump optimization pass before the second
3109 cse pass sometimes simplifies the RTL enough to allow
3110 the second CSE pass to do a better job. Jump_optimize can change
3111 max_reg_num so we must rerun reg_scan afterwards.
3112 ??? Rework to not call reg_scan so often. */
3113 TIMEVAR (jump_time, reg_scan (insns, max_reg_num (), 0));
3114 TIMEVAR (jump_time, jump_optimize (insns, 0, 0, 1));
3116 TIMEVAR (cse2_time, reg_scan (insns, max_reg_num (), 0));
3117 TIMEVAR (cse2_time, tem = cse_main (insns, max_reg_num (),
3118 1, cse2_dump_file));
3120 TIMEVAR (jump_time, jump_optimize (insns, 0, 0, 0));
3123 if (optimize > 0 && flag_thread_jumps)
3125 /* This pass of jump threading straightens out code
3126 that was kinked by loop optimization. */
3127 TIMEVAR (jump_time, reg_scan (insns, max_reg_num (), 0));
3128 TIMEVAR (jump_time, thread_jumps (insns, max_reg_num (), 0));
3130 /* Dump rtl code after cse, if we are doing that. */
3135 print_rtl (cse2_dump_file, insns);
3136 fflush (cse2_dump_file);
3139 /* We are no longer anticipating cse in this function, at least. */
3141 cse_not_expected = 1;
3143 /* Now we choose between stupid (pcc-like) register allocation
3144 (if we got the -noreg switch and not -opt)
3145 and smart register allocation. */
3147 if (optimize > 0) /* Stupid allocation probably won't work */
3148 obey_regdecls = 0; /* if optimizations being done. */
3152 /* Print function header into flow dump now
3153 because doing the flow analysis makes some of the dump. */
3158 fprintf (flow_dump_file, "\n;; Function %s\n\n",
3159 IDENTIFIER_POINTER (DECL_NAME (decl)));
3166 regclass (insns, max_reg_num ());
3167 stupid_life_analysis (insns, max_reg_num (),
3173 /* Do control and data flow analysis,
3174 and write some of the results to dump file. */
3176 TIMEVAR (flow_time, flow_analysis (insns, max_reg_num (),
3178 if (warn_uninitialized)
3180 uninitialized_vars_warning (DECL_INITIAL (decl));
3181 setjmp_args_warning ();
3185 /* Dump rtl after flow analysis. */
3190 print_rtl (flow_dump_file, insns);
3191 fflush (flow_dump_file);
3194 /* If -opt, try combining insns through substitution. */
3197 TIMEVAR (combine_time, combine_instructions (insns, max_reg_num ()));
3199 /* Dump rtl code after insn combination. */
3204 fprintf (combine_dump_file, "\n;; Function %s\n\n",
3205 IDENTIFIER_POINTER (DECL_NAME (decl)));
3206 dump_combine_stats (combine_dump_file);
3207 print_rtl (combine_dump_file, insns);
3208 fflush (combine_dump_file);
3211 /* Print function header into sched dump now
3212 because doing the sched analysis makes some of the dump. */
3217 fprintf (sched_dump_file, "\n;; Function %s\n\n",
3218 IDENTIFIER_POINTER (DECL_NAME (decl)));
3221 if (optimize > 0 && flag_schedule_insns)
3223 /* Do control and data sched analysis,
3224 and write some of the results to dump file. */
3226 TIMEVAR (sched_time, schedule_insns (sched_dump_file));
3229 /* Dump rtl after instruction scheduling. */
3234 print_rtl (sched_dump_file, insns);
3235 fflush (sched_dump_file);
3238 /* Unless we did stupid register allocation,
3239 allocate pseudo-regs that are used only within 1 basic block. */
3242 TIMEVAR (local_alloc_time,
3244 regclass (insns, max_reg_num ());
3248 /* Dump rtl code after allocating regs within basic blocks. */
3253 fprintf (local_reg_dump_file, "\n;; Function %s\n\n",
3254 IDENTIFIER_POINTER (DECL_NAME (decl)));
3255 dump_flow_info (local_reg_dump_file);
3256 dump_local_alloc (local_reg_dump_file);
3257 print_rtl (local_reg_dump_file, insns);
3258 fflush (local_reg_dump_file);
3261 if (global_reg_dump)
3263 fprintf (global_reg_dump_file, "\n;; Function %s\n\n",
3264 IDENTIFIER_POINTER (DECL_NAME (decl))));
3266 /* Save the last label number used so far, so reorg can tell
3267 when it's safe to kill spill regs. */
3268 max_label_num_after_reload = max_label_num ();
3270 /* Unless we did stupid register allocation,
3271 allocate remaining pseudo-regs, then do the reload pass
3272 fixing up any insns that are invalid. */
3274 TIMEVAR (global_alloc_time,
3277 failure = global_alloc (global_reg_dump_file);
3279 failure = reload (insns, 0, global_reg_dump_file);
3282 if (global_reg_dump)
3285 dump_global_regs (global_reg_dump_file);
3286 print_rtl (global_reg_dump_file, insns);
3287 fflush (global_reg_dump_file);
3291 goto exit_rest_of_compilation;
3293 reload_completed = 1;
3295 /* On some machines, the prologue and epilogue code, or parts thereof,
3296 can be represented as RTL. Doing so lets us schedule insns between
3297 it and the rest of the code and also allows delayed branch
3298 scheduling to operate in the epilogue. */
3300 thread_prologue_and_epilogue_insns (insns);
3302 if (optimize > 0 && flag_schedule_insns_after_reload)
3307 fprintf (sched2_dump_file, "\n;; Function %s\n\n",
3308 IDENTIFIER_POINTER (DECL_NAME (decl)));
3311 /* Do control and data sched analysis again,
3312 and write some more of the results to dump file. */
3314 TIMEVAR (sched2_time, schedule_insns (sched2_dump_file));
3316 /* Dump rtl after post-reorder instruction scheduling. */
3321 print_rtl (sched2_dump_file, insns);
3322 fflush (sched2_dump_file);
3326 #ifdef LEAF_REGISTERS
3328 if (optimize > 0 && only_leaf_regs_used () && leaf_function_p ())
3332 /* One more attempt to remove jumps to .+1
3333 left by dead-store-elimination.
3334 Also do cross-jumping this time
3335 and delete no-op move insns. */
3339 TIMEVAR (jump_time, jump_optimize (insns, 1, 1, 0));
3342 /* Dump rtl code after jump, if we are doing that. */
3347 fprintf (jump2_opt_dump_file, "\n;; Function %s\n\n",
3348 IDENTIFIER_POINTER (DECL_NAME (decl)));
3349 print_rtl (jump2_opt_dump_file, insns);
3350 fflush (jump2_opt_dump_file);
3353 /* If a machine dependent reorganization is needed, call it. */
3354 #ifdef MACHINE_DEPENDENT_REORG
3355 MACHINE_DEPENDENT_REORG (insns);
3358 /* If a scheduling pass for delayed branches is to be done,
3359 call the scheduling code. */
3362 if (optimize > 0 && flag_delayed_branch)
3364 TIMEVAR (dbr_sched_time, dbr_schedule (insns, dbr_sched_dump_file));
3369 fprintf (dbr_sched_dump_file, "\n;; Function %s\n\n",
3370 IDENTIFIER_POINTER (DECL_NAME (decl)));
3371 print_rtl (dbr_sched_dump_file, insns);
3372 fflush (dbr_sched_dump_file);
3378 /* Shorten branches. */
3379 TIMEVAR (shorten_branch_time,
3381 shorten_branches (get_insns ());
3385 TIMEVAR (stack_reg_time, reg_to_stack (insns, stack_reg_dump_file));
3390 fprintf (stack_reg_dump_file, "\n;; Function %s\n\n",
3391 IDENTIFIER_POINTER (DECL_NAME (decl)));
3392 print_rtl (stack_reg_dump_file, insns);
3393 fflush (stack_reg_dump_file);
3398 /* Now turn the rtl into assembler code. */
3400 TIMEVAR (final_time,
3405 /* Get the function's name, as described by its RTL.
3406 This may be different from the DECL_NAME name used
3407 in the source file. */
3409 x = DECL_RTL (decl);
3410 if (GET_CODE (x) != MEM)
3413 if (GET_CODE (x) != SYMBOL_REF)
3415 fnname = XSTR (x, 0);
3417 assemble_start_function (decl, fnname);
3418 final_start_function (insns, asm_out_file, optimize);
3419 final (insns, asm_out_file, optimize, 0);
3420 final_end_function (insns, asm_out_file, optimize);
3421 assemble_end_function (decl, fnname);
3422 fflush (asm_out_file);
3425 /* Write DBX symbols if requested */
3427 /* Note that for those inline functions where we don't initially
3428 know for certain that we will be generating an out-of-line copy,
3429 the first invocation of this routine (rest_of_compilation) will
3430 skip over this code by doing a `goto exit_rest_of_compilation;'.
3431 Later on, finish_compilation will call rest_of_compilation again
3432 for those inline functions that need to have out-of-line copies
3433 generated. During that call, we *will* be routed past here. */
3435 #ifdef DBX_DEBUGGING_INFO
3436 if (write_symbols == DBX_DEBUG)
3437 TIMEVAR (symout_time, dbxout_function (decl));
3440 #ifdef DWARF_DEBUGGING_INFO
3441 if (write_symbols == DWARF_DEBUG)
3442 TIMEVAR (symout_time, dwarfout_file_scope_decl (decl, 0));
3445 #ifdef DWARF2_DEBUGGING_INFO
3446 if (write_symbols == DWARF2_DEBUG)
3447 TIMEVAR (symout_time, dwarf2out_decl (decl));
3450 exit_rest_of_compilation:
3452 /* In case the function was not output,
3453 don't leave any temporary anonymous types
3454 queued up for sdb output. */
3455 #ifdef SDB_DEBUGGING_INFO
3456 if (write_symbols == SDB_DEBUG)
3457 sdbout_types (NULL_TREE);
3460 /* Put back the tree of subblocks and list of arguments
3461 from before we copied them.
3462 Code generation and the output of debugging info may have modified
3463 the copy, but the original is unchanged. */
3465 if (saved_block_tree != 0)
3467 DECL_INITIAL (decl) = saved_block_tree;
3468 DECL_ARGUMENTS (decl) = saved_arguments;
3469 DECL_ABSTRACT_ORIGIN (decl) = NULL_TREE;
3472 reload_completed = 0;
3474 /* Clear out the insn_length contents now that they are no longer valid. */
3475 init_insn_lengths ();
3477 /* Clear out the real_constant_chain before some of the rtx's
3478 it runs through become garbage. */
3480 clear_const_double_mem ();
3482 /* Cancel the effect of rtl_in_current_obstack. */
3484 resume_temporary_allocation ();
3486 /* Show no temporary slots allocated. */
3490 /* The parsing time is all the time spent in yyparse
3491 *except* what is spent in this function. */
3493 parse_time -= get_run_time () - start_time;
3496 /* Entry point of cc1/c++. Decode command args, then call compile_file.
3497 Exit code is 35 if can't open files, 34 if fatal error,
3498 33 if had nonfatal errors, else success. */
3501 main (argc, argv, envp)
3508 int flag_print_mem = 0;
3509 int version_flag = 0;
3512 /* save in case md file wants to emit args as a comment. */
3516 p = argv[0] + strlen (argv[0]);
3517 while (p != argv[0] && p[-1] != '/'
3518 #ifdef DIR_SEPARATOR
3519 && p[-1] != DIR_SEPARATOR
3526 /* Get rid of any avoidable limit on stack size. */
3530 /* Set the stack limit huge so that alloca does not fail. */
3531 getrlimit (RLIMIT_STACK, &rlim);
3532 rlim.rlim_cur = rlim.rlim_max;
3533 setrlimit (RLIMIT_STACK, &rlim);
3535 #endif /* RLIMIT_STACK */
3537 signal (SIGFPE, float_signal);
3540 signal (SIGPIPE, pipe_closed);
3543 decl_printable_name = decl_name;
3544 lang_expand_expr = (struct rtx_def *(*)()) do_abort;
3546 /* Initialize whether `char' is signed. */
3547 flag_signed_char = DEFAULT_SIGNED_CHAR;
3548 #ifdef DEFAULT_SHORT_ENUMS
3549 /* Initialize how much space enums occupy, by default. */
3550 flag_short_enums = DEFAULT_SHORT_ENUMS;
3553 /* Scan to see what optimization level has been specified. That will
3554 determine the default value of many flags. */
3555 for (i = 1; i < argc; i++)
3557 if (!strcmp (argv[i], "-O"))
3561 else if (argv[i][0] == '-' && argv[i][1] == 'O')
3563 /* Handle -O2, -O3, -O69, ... */
3564 char *p = &argv[i][2];
3568 if (! (c >= '0' && c <= '9'))
3571 optimize = atoi (&argv[i][2]);
3575 obey_regdecls = (optimize == 0);
3580 flag_thread_jumps = 1;
3582 flag_delayed_branch = 1;
3584 #ifdef CAN_DEBUG_WITHOUT_FP
3585 flag_omit_frame_pointer = 1;
3591 flag_cse_follow_jumps = 1;
3592 flag_cse_skip_blocks = 1;
3593 flag_expensive_optimizations = 1;
3594 flag_strength_reduce = 1;
3595 flag_rerun_cse_after_loop = 1;
3596 flag_caller_saves = 1;
3598 #ifdef INSN_SCHEDULING
3599 flag_schedule_insns = 1;
3600 flag_schedule_insns_after_reload = 1;
3606 flag_inline_functions = 1;
3609 /* Initialize target_flags before OPTIMIZATION_OPTIONS so the latter can
3612 set_target_switch ("");
3614 #ifdef OPTIMIZATION_OPTIONS
3615 /* Allow default optimizations to be specified on a per-machine basis. */
3616 OPTIMIZATION_OPTIONS (optimize);
3619 /* Initialize register usage now so switches may override. */
3622 for (i = 1; i < argc; i++)
3625 /* If this is a language-specific option,
3626 decode it in a language-specific way. */
3627 for (j = 0; lang_options[j] != 0; j++)
3628 if (!strncmp (argv[i], lang_options[j],
3629 strlen (lang_options[j])))
3631 if (lang_options[j] != 0)
3632 /* If the option is valid for *some* language,
3633 treat it as valid even if this language doesn't understand it. */
3634 lang_decode_option (argv[i]);
3635 else if (argv[i][0] == '-' && argv[i][1] != 0)
3637 register char *str = argv[i] + 1;
3642 set_target_switch (&str[1]);
3643 else if (!strcmp (str, "dumpbase"))
3645 dump_base_name = argv[++i];
3647 else if (str[0] == 'd')
3649 register char *p = &str[1];
3657 global_reg_dump = 1;
3663 cse_dump = 1, cse2_dump = 1;
3681 global_reg_dump = 1;
3699 flag_print_asm_name = 1;
3720 rtl_dump_and_exit = 1;
3727 else if (str[0] == 'f')
3729 register char *p = &str[1];
3732 /* Some kind of -f option.
3733 P's value is the option sans `-f'.
3734 Search for it in the table of options. */
3737 !found && j < sizeof (f_options) / sizeof (f_options[0]);
3740 if (!strcmp (p, f_options[j].string))
3742 *f_options[j].variable = f_options[j].on_value;
3743 /* A goto here would be cleaner,
3744 but breaks the vax pcc. */
3747 if (p[0] == 'n' && p[1] == 'o' && p[2] == '-'
3748 && ! strcmp (p+3, f_options[j].string))
3750 *f_options[j].variable = ! f_options[j].on_value;
3757 else if (!strncmp (p, "fixed-", 6))
3758 fix_register (&p[6], 1, 1);
3759 else if (!strncmp (p, "call-used-", 10))
3760 fix_register (&p[10], 0, 1);
3761 else if (!strncmp (p, "call-saved-", 11))
3762 fix_register (&p[11], 0, 0);
3764 error ("Invalid option `%s'", argv[i]);
3766 else if (str[0] == 'O')
3768 register char *p = str+1;
3769 while (*p && *p >= '0' && *p <= '9')
3774 error ("Invalid option `%s'", argv[i]);
3776 else if (!strcmp (str, "pedantic"))
3778 else if (!strcmp (str, "pedantic-errors"))
3779 flag_pedantic_errors = pedantic = 1;
3780 else if (!strcmp (str, "quiet"))
3782 else if (!strcmp (str, "version"))
3784 else if (!strcmp (str, "w"))
3785 inhibit_warnings = 1;
3786 else if (!strcmp (str, "W"))
3789 /* We save the value of warn_uninitialized, since if they put
3790 -Wuninitialized on the command line, we need to generate a
3791 warning about not using it without also specifying -O. */
3792 if (warn_uninitialized != 1)
3793 warn_uninitialized = 2;
3795 else if (str[0] == 'W')
3797 register char *p = &str[1];
3800 /* Some kind of -W option.
3801 P's value is the option sans `-W'.
3802 Search for it in the table of options. */
3805 !found && j < sizeof (W_options) / sizeof (W_options[0]);
3808 if (!strcmp (p, W_options[j].string))
3810 *W_options[j].variable = W_options[j].on_value;
3811 /* A goto here would be cleaner,
3812 but breaks the vax pcc. */
3815 if (p[0] == 'n' && p[1] == 'o' && p[2] == '-'
3816 && ! strcmp (p+3, W_options[j].string))
3818 *W_options[j].variable = ! W_options[j].on_value;
3825 else if (!strncmp (p, "id-clash-", 9))
3831 if (*endp >= '0' && *endp <= '9')
3835 error ("Invalid option `%s'", argv[i]);
3840 id_clash_len = atoi (str + 10);
3843 else if (!strncmp (p, "larger-than-", 12))
3845 char *endp = p + 12;
3849 if (*endp >= '0' && *endp <= '9')
3853 error ("Invalid option `%s'", argv[i]);
3854 goto larger_than_lose;
3857 warn_larger_than = 1;
3858 larger_than_size = atoi (str + 13);
3862 error ("Invalid option `%s'", argv[i]);
3864 else if (!strcmp (str, "p"))
3868 else if (!strcmp (str, "a"))
3870 #if !defined (BLOCK_PROFILER) || !defined (FUNCTION_BLOCK_PROFILER)
3871 warning ("`-a' option (basic block profile) not supported");
3873 profile_block_flag = (profile_block_flag < 2) ? 1 : 3;
3876 else if (!strcmp (str, "ax"))
3878 #if !defined (FUNCTION_BLOCK_PROFILER_EXIT) || !defined (BLOCK_PROFILER) || !defined (FUNCTION_BLOCK_PROFILER)
3879 warning ("`-ax' option (jump profiling) not supported");
3881 profile_block_flag = (!profile_block_flag
3882 || profile_block_flag == 2) ? 2 : 3;
3885 else if (str[0] == 'g')
3889 /* A lot of code assumes write_symbols == NO_DEBUG if the
3890 debugging level is 0 (thus -gstabs1 -gstabs0 would lose track
3891 of what debugging type has been selected). This records the
3892 selected type. It is an error to specify more than one
3894 static enum debug_info_type selected_debug_type = NO_DEBUG;
3895 /* Non-zero if debugging format has been explicitly set.
3896 -g and -ggdb don't explicitly set the debugging format so
3897 -gdwarf -g3 is equivalent to -gdwarf3. */
3898 static int type_explicitly_set_p = 0;
3899 /* Table of supported debugging formats. */
3902 /* Since PREFERRED_DEBUGGING_TYPE isn't necessarily a
3903 constant expression, we use NO_DEBUG in its place. */
3904 enum debug_info_type debug_type;
3905 int use_extensions_p;
3906 } *da, debug_args[] = {
3907 { "g", NO_DEBUG, DEFAULT_GDB_EXTENSIONS },
3908 { "ggdb", NO_DEBUG, 1 },
3909 #ifdef DBX_DEBUGGING_INFO
3910 { "gstabs", DBX_DEBUG, 0 },
3911 { "gstabs+", DBX_DEBUG, 1 },
3913 #ifdef DWARF_DEBUGGING_INFO
3914 { "gdwarf", DWARF_DEBUG, 0 },
3915 { "gdwarf+", DWARF_DEBUG, 1 },
3917 #ifdef DWARF2_DEBUGGING_INFO
3918 { "gdwarf-2", DWARF2_DEBUG, 0 },
3920 #ifdef XCOFF_DEBUGGING_INFO
3921 { "gxcoff", XCOFF_DEBUG, 0 },
3922 { "gxcoff+", XCOFF_DEBUG, 1 },
3924 #ifdef SDB_DEBUGGING_INFO
3925 { "gcoff", SDB_DEBUG, 0 },
3929 /* Indexed by enum debug_info_type. */
3930 static char *debug_type_names[] = {
3931 "none", "stabs", "coff", "dwarf-1", "dwarf-2", "xcoff"
3934 /* Look up STR in the table. */
3935 for (da = debug_args; da->arg; da++)
3937 if (! strncmp (str, da->arg, strlen (da->arg)))
3939 enum debug_info_type type = da->debug_type;
3942 p = str + strlen (da->arg);
3943 if (*p && (*p < '0' || *p > '9'))
3946 while (*q && (*q >= '0' && *q <= '9'))
3951 level = 2; /* default debugging info level */
3952 if (*q || level > 3)
3954 warning ("invalid debug level specification in option: `-%s'",
3956 /* ??? This error message is incorrect in the case of
3958 warning ("no debugging information will be generated");
3962 /* ??? A few targets use STR in the
3963 definition of PREFERRED_DEBUGGING_TYPE! */
3964 if (type == NO_DEBUG)
3965 type = PREFERRED_DEBUGGING_TYPE;
3967 if (type == NO_DEBUG)
3968 warning ("`-%s' not supported by this configuration of GCC",
3971 /* Does it conflict with an already selected type? */
3972 if (type_explicitly_set_p
3973 /* -g/-ggdb don't conflict with anything */
3974 && da->debug_type != NO_DEBUG
3975 && type != selected_debug_type)
3976 warning ("`-%s' ignored, conflicts with `-g%s'",
3977 str, debug_type_names[(int) selected_debug_type]);
3980 /* If the format has already been set, -g/-ggdb
3981 only change the debug level. */
3982 if (type_explicitly_set_p
3983 && da->debug_type == NO_DEBUG)
3984 ; /* don't change debugging type */
3987 selected_debug_type = type;
3988 type_explicitly_set_p = da->debug_type != NO_DEBUG;
3990 write_symbols = (level == 0
3992 : selected_debug_type);
3993 use_gnu_debug_info_extensions = da->use_extensions_p;
3994 debug_info_level = (enum debug_info_level) level;
4000 warning ("`-%s' not supported by this configuration of GCC",
4003 else if (!strcmp (str, "o"))
4005 asm_file_name = argv[++i];
4007 else if (str[0] == 'G')
4009 g_switch_set = TRUE;
4010 g_switch_value = atoi ((str[1] != '\0') ? str+1 : argv[++i]);
4012 else if (!strncmp (str, "aux-info", 8))
4014 flag_gen_aux_info = 1;
4015 aux_info_file_name = (str[8] != '\0' ? str+8 : argv[++i]);
4018 error ("Invalid option `%s'", argv[i]);
4020 else if (argv[i][0] == '+')
4021 error ("Invalid option `%s'", argv[i]);
4026 /* Initialize for bytecode output. A good idea to do this as soon as
4027 possible after the "-f" options have been parsed. */
4028 if (output_bytecode)
4030 #ifndef TARGET_SUPPORTS_BYTECODE
4031 /* Just die with a fatal error if not supported */
4032 fatal ("-fbytecode not supported for this target");
4040 /* Inlining does not work if not optimizing,
4041 so force it not to be done. */
4045 /* The c_decode_option and lang_decode_option functions set
4046 this to `2' if -Wall is used, so we can avoid giving out
4047 lots of errors for people who don't realize what -Wall does. */
4048 if (warn_uninitialized == 1)
4049 warning ("-Wuninitialized is not supported without -O");
4052 #ifdef OVERRIDE_OPTIONS
4053 /* Some machines may reject certain combinations of options. */
4057 if (profile_block_flag == 3)
4059 warning ("`-ax' and `-a' are conflicting options. `-a' ignored.");
4060 profile_block_flag = 2;
4063 /* Unrolling all loops implies that standard loop unrolling must also
4065 if (flag_unroll_all_loops)
4066 flag_unroll_loops = 1;
4067 /* Loop unrolling requires that strength_reduction be on also. Silently
4068 turn on strength reduction here if it isn't already on. Also, the loop
4069 unrolling code assumes that cse will be run after loop, so that must
4070 be turned on also. */
4071 if (flag_unroll_loops)
4073 flag_strength_reduce = 1;
4074 flag_rerun_cse_after_loop = 1;
4077 /* Warn about options that are not supported on this machine. */
4078 #ifndef INSN_SCHEDULING
4079 if (flag_schedule_insns || flag_schedule_insns_after_reload)
4080 warning ("instruction scheduling not supported on this target machine");
4083 if (flag_delayed_branch)
4084 warning ("this target machine does not have delayed branches");
4087 /* If we are in verbose mode, write out the version and maybe all the
4088 option flags in use. */
4091 print_version (stderr, "");
4093 print_switch_values (stderr, 0, MAX_LINE, "", " ", "\n");
4096 compile_file (filename);
4098 #if !defined(OS2) && !defined(VMS) && (!defined(_WIN32) || defined (__CYGWIN32__))
4101 char *lim = (char *) sbrk (0);
4103 fprintf (stderr, "Data size %d.\n",
4104 lim - (char *) &environ);
4108 system ("ps -l 1>&2");
4111 #endif /* not USG */
4113 #endif /* ! OS2 && ! VMS && (! _WIN32 || CYGWIN32) */
4116 exit (FATAL_EXIT_CODE);
4118 exit (FATAL_EXIT_CODE);
4119 exit (SUCCESS_EXIT_CODE);
4123 /* Decode -m switches. */
4125 /* Here is a table, controlled by the tm.h file, listing each -m switch
4126 and which bits in `target_switches' it should set or clear.
4127 If VALUE is positive, it is bits to set.
4128 If VALUE is negative, -VALUE is bits to clear.
4129 (The sign bit is not used so there is no confusion.) */
4131 struct {char *name; int value;} target_switches []
4134 /* This table is similar, but allows the switch to have a value. */
4136 #ifdef TARGET_OPTIONS
4137 struct {char *prefix; char ** variable;} target_options []
4141 /* Decode the switch -mNAME. */
4144 set_target_switch (name)
4150 for (j = 0; j < sizeof target_switches / sizeof target_switches[0]; j++)
4151 if (!strcmp (target_switches[j].name, name))
4153 if (target_switches[j].value < 0)
4154 target_flags &= ~-target_switches[j].value;
4156 target_flags |= target_switches[j].value;
4160 #ifdef TARGET_OPTIONS
4162 for (j = 0; j < sizeof target_options / sizeof target_options[0]; j++)
4164 int len = strlen (target_options[j].prefix);
4165 if (!strncmp (target_options[j].prefix, name, len))
4167 *target_options[j].variable = name + len;
4174 error ("Invalid option `%s'", name);
4177 /* Print version information to FILE.
4178 Each line begins with INDENT (for the case where FILE is the
4179 assembler output file). */
4182 print_version (file, indent)
4186 fprintf (file, "%s%s%s version %s", indent, *indent != 0 ? " " : "",
4187 language_string, version_string);
4188 fprintf (file, " (%s)", TARGET_NAME);
4191 #define __VERSION__ "[unknown]"
4193 fprintf (file, " compiled by GNU C version %s.\n", __VERSION__);
4195 fprintf (file, " compiled by CC.\n");
4199 /* Print an option value and return the adjusted position in the line.
4200 ??? We don't handle error returns from fprintf (disk full); presumably
4201 other code will catch a disk full though. */
4204 print_single_switch (file, pos, max, indent, sep, term, type, name)
4207 char *indent, *sep, *term, *type, *name;
4209 /* The ultrix fprintf returns 0 on success, so compute the result we want
4210 here since we need it for the following test. */
4211 int len = strlen (sep) + strlen (type) + strlen (name);
4216 fprintf (file, "%s", term);
4221 fprintf (file, "%s", indent);
4222 pos = strlen (indent);
4224 fprintf (file, "%s%s%s", sep, type, name);
4229 /* Print active target switches to FILE.
4230 POS is the current cursor position and MAX is the size of a "line".
4231 Each line begins with INDENT and ends with TERM.
4232 Each switch is separated from the next by SEP. */
4235 print_switch_values (file, pos, max, indent, sep, term)
4238 char *indent, *sep, *term;
4243 /* Print the options as passed. */
4245 pos = print_single_switch (file, pos, max, indent, *indent ? " " : "", term,
4246 "options passed: ", "");
4248 for (p = &save_argv[1]; *p != NULL; p++)
4252 if (strcmp (*p, "-o") == 0)
4258 if (strcmp (*p, "-quiet") == 0)
4260 if (strcmp (*p, "-version") == 0)
4265 pos = print_single_switch (file, pos, max, indent, sep, term, *p, "");
4268 fprintf (file, "%s", term);
4270 /* Print the -f and -m options that have been enabled.
4271 We don't handle language specific options but printing argv
4274 pos = print_single_switch (file, 0, max, indent, *indent ? " " : "", term,
4275 "options enabled: ", "");
4277 for (j = 0; j < sizeof f_options / sizeof f_options[0]; j++)
4278 if (*f_options[j].variable == f_options[j].on_value)
4279 pos = print_single_switch (file, pos, max, indent, sep, term,
4280 "-f", f_options[j].string);
4282 /* Print target specific options. */
4284 flags = target_flags;
4285 for (j = 0; j < sizeof target_switches / sizeof target_switches[0]; j++)
4286 if (target_switches[j].name[0] != '\0'
4287 && target_switches[j].value > 0
4288 && ((target_switches[j].value & target_flags)
4289 == target_switches[j].value))
4291 pos = print_single_switch (file, pos, max, indent, sep, term,
4292 "-m", target_switches[j].name);
4293 flags &= ~ target_switches[j].value;
4296 #ifdef TARGET_OPTIONS
4297 for (j = 0; j < sizeof target_options / sizeof target_options[0]; j++)
4298 if (*target_options[j].variable != NULL)
4301 sprintf (prefix, "-m%s", target_options[j].prefix);
4302 pos = print_single_switch (file, pos, max, indent, sep, term,
4303 prefix, *target_options[j].variable);
4307 fprintf (file, "%s", term);
4310 /* Record the beginning of a new source file, named FILENAME. */
4313 debug_start_source_file (filename)
4314 register char *filename;
4316 #ifdef DBX_DEBUGGING_INFO
4317 if (write_symbols == DBX_DEBUG)
4318 dbxout_start_new_source_file (filename);
4320 #ifdef DWARF_DEBUGGING_INFO
4321 if (debug_info_level == DINFO_LEVEL_VERBOSE
4322 && write_symbols == DWARF_DEBUG)
4323 dwarfout_start_new_source_file (filename);
4324 #endif /* DWARF_DEBUGGING_INFO */
4325 #ifdef DWARF2_DEBUGGING_INFO
4326 if (debug_info_level == DINFO_LEVEL_VERBOSE
4327 && write_symbols == DWARF2_DEBUG)
4328 dwarf2out_start_source_file (filename);
4329 #endif /* DWARF2_DEBUGGING_INFO */
4330 #ifdef SDB_DEBUGGING_INFO
4331 if (write_symbols == SDB_DEBUG)
4332 sdbout_start_new_source_file (filename);
4336 /* Record the resumption of a source file. LINENO is the line number in
4337 the source file we are returning to. */
4340 debug_end_source_file (lineno)
4341 register unsigned lineno;
4343 #ifdef DBX_DEBUGGING_INFO
4344 if (write_symbols == DBX_DEBUG)
4345 dbxout_resume_previous_source_file ();
4347 #ifdef DWARF_DEBUGGING_INFO
4348 if (debug_info_level == DINFO_LEVEL_VERBOSE
4349 && write_symbols == DWARF_DEBUG)
4350 dwarfout_resume_previous_source_file (lineno);
4351 #endif /* DWARF_DEBUGGING_INFO */
4352 #ifdef DWARF2_DEBUGGING_INFO
4353 if (debug_info_level == DINFO_LEVEL_VERBOSE
4354 && write_symbols == DWARF2_DEBUG)
4355 dwarf2out_end_source_file ();
4356 #endif /* DWARF2_DEBUGGING_INFO */
4357 #ifdef SDB_DEBUGGING_INFO
4358 if (write_symbols == SDB_DEBUG)
4359 sdbout_resume_previous_source_file ();
4363 /* Called from check_newline in c-parse.y. The `buffer' parameter contains
4364 the tail part of the directive line, i.e. the part which is past the
4365 initial whitespace, #, whitespace, directive-name, whitespace part. */
4368 debug_define (lineno, buffer)
4369 register unsigned lineno;
4370 register char *buffer;
4372 #ifdef DWARF_DEBUGGING_INFO
4373 if (debug_info_level == DINFO_LEVEL_VERBOSE
4374 && write_symbols == DWARF_DEBUG)
4375 dwarfout_define (lineno, buffer);
4376 #endif /* DWARF_DEBUGGING_INFO */
4377 #ifdef DWARF2_DEBUGGING_INFO
4378 if (debug_info_level == DINFO_LEVEL_VERBOSE
4379 && write_symbols == DWARF2_DEBUG)
4380 dwarf2out_define (lineno, buffer);
4381 #endif /* DWARF2_DEBUGGING_INFO */
4384 /* Called from check_newline in c-parse.y. The `buffer' parameter contains
4385 the tail part of the directive line, i.e. the part which is past the
4386 initial whitespace, #, whitespace, directive-name, whitespace part. */
4389 debug_undef (lineno, buffer)
4390 register unsigned lineno;
4391 register char *buffer;
4393 #ifdef DWARF_DEBUGGING_INFO
4394 if (debug_info_level == DINFO_LEVEL_VERBOSE
4395 && write_symbols == DWARF_DEBUG)
4396 dwarfout_undef (lineno, buffer);
4397 #endif /* DWARF_DEBUGGING_INFO */
4398 #ifdef DWARF2_DEBUGGING_INFO
4399 if (debug_info_level == DINFO_LEVEL_VERBOSE
4400 && write_symbols == DWARF2_DEBUG)
4401 dwarf2out_undef (lineno, buffer);
4402 #endif /* DWARF2_DEBUGGING_INFO */