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 ();
154 extern void regset_release_memory ();
156 void rest_of_decl_compilation ();
157 void error_with_file_and_line PVPROTO((char *file, int line, char *s, ...));
158 void error_with_decl PVPROTO((tree decl, char *s, ...));
159 void error_for_asm PVPROTO((rtx insn, char *s, ...));
160 void error PVPROTO((char *s, ...));
161 void fatal PVPROTO((char *s, ...));
162 void warning_with_file_and_line PVPROTO((char *file, int line, char *s, ...));
163 void warning_with_decl PVPROTO((tree decl, char *s, ...));
164 void warning_for_asm PVPROTO((rtx insn, char *s, ...));
165 void warning PVPROTO((char *s, ...));
166 void pedwarn PVPROTO((char *s, ...));
167 void pedwarn_with_decl PVPROTO((tree decl, char *s, ...));
168 void pedwarn_with_file_and_line PVPROTO((char *file, int line, char *s, ...));
169 void sorry PVPROTO((char *s, ...));
170 void really_sorry PVPROTO((char *s, ...));
175 void set_target_switch ();
176 static char *decl_name ();
178 void print_version ();
179 int print_single_switch ();
180 void print_switch_values ();
181 /* Length of line when printing switch values. */
185 extern char *sbrk ();
188 /* Name of program invoked, sans directories. */
192 /* Copy of arguments to main. */
196 /* Name of current original source file (what was input to cpp).
197 This comes from each #-command in the actual input. */
199 char *input_filename;
201 /* Name of top-level original source file (what was input to cpp).
202 This comes from the #-command at the beginning of the actual input.
203 If there isn't any there, then this is the cc1 input file name. */
205 char *main_input_filename;
208 /* Stream for reading from the input file. */
212 /* Current line number in real source file. */
216 /* Stack of currently pending input files. */
218 struct file_stack *input_file_stack;
220 /* Incremented on each change to input_file_stack. */
221 int input_file_stack_tick;
223 /* FUNCTION_DECL for function now being parsed or compiled. */
225 extern tree current_function_decl;
227 /* Name to use as base of names for dump output files. */
229 char *dump_base_name;
231 /* Bit flags that specify the machine subtype we are compiling for.
232 Bits are tested using macros TARGET_... defined in the tm.h file
233 and set by `-m...' switches. Must be defined in rtlanal.c. */
235 extern int target_flags;
237 /* Flags saying which kinds of debugging dump have been requested. */
240 int rtl_dump_and_exit = 0;
241 int jump_opt_dump = 0;
245 int branch_prob_dump = 0;
247 int combine_dump = 0;
249 int local_reg_dump = 0;
250 int global_reg_dump = 0;
252 int jump2_opt_dump = 0;
253 int dbr_sched_dump = 0;
254 int flag_print_asm_name = 0;
255 int stack_reg_dump = 0;
257 /* Name for output file of assembly code, specified with -o. */
261 /* Value of the -G xx switch, and whether it was passed or not. */
265 /* Type(s) of debugging information we are producing (if any).
266 See flags.h for the definitions of the different possible
267 types of debugging information. */
268 enum debug_info_type write_symbols = NO_DEBUG;
270 /* Level of debugging information we are producing. See flags.h
271 for the definitions of the different possible levels. */
272 enum debug_info_level debug_info_level = DINFO_LEVEL_NONE;
274 /* Nonzero means use GNU-only extensions in the generated symbolic
275 debugging information. */
276 /* Currently, this only has an effect when write_symbols is set to
277 DBX_DEBUG, XCOFF_DEBUG, or DWARF_DEBUG. */
278 int use_gnu_debug_info_extensions = 0;
280 /* Nonzero means do optimizations. -O.
281 Particular numeric values stand for particular amounts of optimization;
282 thus, -O2 stores 2 here. However, the optimizations beyond the basic
283 ones are not controlled directly by this variable. Instead, they are
284 controlled by individual `flag_...' variables that are defaulted
285 based on this variable. */
289 /* Number of error messages and warning messages so far. */
292 int warningcount = 0;
295 /* Flag to output bytecode instead of native assembler */
296 int output_bytecode = 0;
298 /* Pointer to function to compute the name to use to print a declaration.
299 DECL is the declaration in question.
300 VERBOSITY determines what information will be printed:
301 0: DECL_NAME, demangled as necessary.
302 1: and scope information.
303 2: and any other information that might be interesting, such as function
304 parameter types in C++. */
306 char *(*decl_printable_name) (/* tree decl, int verbosity */);
308 /* Pointer to function to compute rtl for a language-specific tree code. */
310 struct rtx_def *(*lang_expand_expr) ();
312 /* Pointer to function to finish handling an incomplete decl at the
313 end of compilation. */
315 void (*incomplete_decl_finalize_hook) () = 0;
317 /* Highest label number used at the end of reload. */
319 int max_label_num_after_reload;
321 /* Nonzero if generating code to do profiling. */
323 int profile_flag = 0;
325 /* Nonzero if generating code to do profiling on a line-by-line basis. */
327 int profile_block_flag;
329 /* Nonzero if generating code to profile program flow graph arcs. */
331 int profile_arc_flag = 0;
333 /* Nonzero if generating info for gcov to calculate line test coverage. */
335 int flag_test_coverage = 0;
337 /* Nonzero indicates that branch taken probabilities should be calculated. */
339 int flag_branch_probabilities = 0;
341 /* Nonzero for -pedantic switch: warn about anything
342 that standard spec forbids. */
346 /* Temporarily suppress certain warnings.
347 This is set while reading code from a system header file. */
349 int in_system_header = 0;
351 /* Nonzero means do stupid register allocation.
352 Currently, this is 1 if `optimize' is 0. */
354 int obey_regdecls = 0;
356 /* Don't print functions as they are compiled and don't print
357 times taken by the various passes. -quiet. */
363 /* Nonzero means `char' should be signed. */
365 int flag_signed_char;
367 /* Nonzero means give an enum type only as many bytes as it needs. */
369 int flag_short_enums;
371 /* Nonzero for -fcaller-saves: allocate values in regs that need to
372 be saved across function calls, if that produces overall better code.
373 Optional now, so people can test it. */
375 #ifdef DEFAULT_CALLER_SAVES
376 int flag_caller_saves = 1;
378 int flag_caller_saves = 0;
381 /* Nonzero if structures and unions should be returned in memory.
383 This should only be defined if compatibility with another compiler or
384 with an ABI is needed, because it results in slower code. */
386 #ifndef DEFAULT_PCC_STRUCT_RETURN
387 #define DEFAULT_PCC_STRUCT_RETURN 1
390 /* Nonzero for -fpcc-struct-return: return values the same way PCC does. */
392 int flag_pcc_struct_return = DEFAULT_PCC_STRUCT_RETURN;
394 /* Nonzero for -fforce-mem: load memory value into a register
395 before arithmetic on it. This makes better cse but slower compilation. */
397 int flag_force_mem = 0;
399 /* Nonzero for -fforce-addr: load memory address into a register before
400 reference to memory. This makes better cse but slower compilation. */
402 int flag_force_addr = 0;
404 /* Nonzero for -fdefer-pop: don't pop args after each function call;
405 instead save them up to pop many calls' args with one insns. */
407 int flag_defer_pop = 0;
409 /* Nonzero for -ffloat-store: don't allocate floats and doubles
410 in extended-precision registers. */
412 int flag_float_store = 0;
414 /* Nonzero for -fcse-follow-jumps:
415 have cse follow jumps to do a more extensive job. */
417 int flag_cse_follow_jumps;
419 /* Nonzero for -fcse-skip-blocks:
420 have cse follow a branch around a block. */
421 int flag_cse_skip_blocks;
423 /* Nonzero for -fexpensive-optimizations:
424 perform miscellaneous relatively-expensive optimizations. */
425 int flag_expensive_optimizations;
427 /* Nonzero for -fthread-jumps:
428 have jump optimize output of loop. */
430 int flag_thread_jumps;
432 /* Nonzero enables strength-reduction in loop.c. */
434 int flag_strength_reduce = 0;
436 /* Nonzero enables loop unrolling in unroll.c. Only loops for which the
437 number of iterations can be calculated at compile-time (UNROLL_COMPLETELY,
438 UNROLL_MODULO) or at run-time (preconditioned to be UNROLL_MODULO) are
441 int flag_unroll_loops;
443 /* Nonzero enables loop unrolling in unroll.c. All loops are unrolled.
444 This is generally not a win. */
446 int flag_unroll_all_loops;
448 /* Nonzero for -fwritable-strings:
449 store string constants in data segment and don't uniquize them. */
451 int flag_writable_strings = 0;
453 /* Nonzero means don't put addresses of constant functions in registers.
454 Used for compiling the Unix kernel, where strange substitutions are
455 done on the assembly output. */
457 int flag_no_function_cse = 0;
459 /* Nonzero for -fomit-frame-pointer:
460 don't make a frame pointer in simple functions that don't require one. */
462 int flag_omit_frame_pointer = 0;
464 /* Nonzero means place each function into its own section on those platforms
465 which support arbitrary section names and unlimited numbers of sections. */
467 int flag_function_sections = 0;
469 /* Nonzero to inhibit use of define_optimization peephole opts. */
471 int flag_no_peephole = 0;
473 /* Nonzero allows GCC to violate some IEEE or ANSI rules regarding math
474 operations in the interest of optimization. For example it allows
475 GCC to assume arguments to sqrt are nonnegative numbers, allowing
476 faster code for sqrt to be generated. */
478 int flag_fast_math = 0;
480 /* Nonzero means all references through pointers are volatile. */
484 /* Nonzero means treat all global and extern variables as global. */
486 int flag_volatile_global;
488 /* Nonzero means just do syntax checking; don't output anything. */
490 int flag_syntax_only = 0;
492 /* Nonzero means to rerun cse after loop optimization. This increases
493 compilation time about 20% and picks up a few more common expressions. */
495 static int flag_rerun_cse_after_loop;
497 /* Nonzero for -finline-functions: ok to inline functions that look like
498 good inline candidates. */
500 int flag_inline_functions;
502 /* Nonzero for -fkeep-inline-functions: even if we make a function
503 go inline everywhere, keep its definition around for debugging
506 int flag_keep_inline_functions;
508 /* Nonzero means that functions will not be inlined. */
512 /* Nonzero means that we should emit static const variables
513 regardless of whether or not optimization is turned on. */
515 int flag_keep_static_consts = 1;
517 /* Nonzero means we should be saving declaration info into a .X file. */
519 int flag_gen_aux_info = 0;
521 /* Specified name of aux-info file. */
523 static char *aux_info_file_name;
525 /* Nonzero means make the text shared if supported. */
527 int flag_shared_data;
529 /* Nonzero means schedule into delayed branch slots if supported. */
531 int flag_delayed_branch;
533 /* Nonzero if we are compiling pure (sharable) code.
534 Value is 1 if we are doing reasonable (i.e. simple
535 offset into offset table) pic. Value is 2 if we can
536 only perform register offsets. */
540 /* Nonzero means generate extra code for exception handling and enable
541 exception handling. */
543 int flag_exceptions = 1;
545 /* Nonzero means don't place uninitialized global data in common storage
550 /* Nonzero means pretend it is OK to examine bits of target floats,
551 even if that isn't true. The resulting code will have incorrect constants,
552 but the same series of instructions that the native compiler would make. */
554 int flag_pretend_float;
556 /* Nonzero means change certain warnings into errors.
557 Usually these are warnings about failure to conform to some standard. */
559 int flag_pedantic_errors = 0;
561 /* flag_schedule_insns means schedule insns within basic blocks (before
563 flag_schedule_insns_after_reload means schedule insns after
566 int flag_schedule_insns = 0;
567 int flag_schedule_insns_after_reload = 0;
569 /* -finhibit-size-directive inhibits output of .size for ELF.
570 This is used only for compiling crtstuff.c,
571 and it may be extended to other effects
572 needed for crtstuff.c on other systems. */
573 int flag_inhibit_size_directive = 0;
575 /* -fverbose-asm causes extra commentary information to be produced in
576 the generated assembly code (to make it more readable). This option
577 is generally only of use to those who actually need to read the
578 generated assembly code (perhaps while debugging the compiler itself).
579 -fverbose-asm is the default. -fno-verbose-asm causes the extra information
580 to be omitted and is useful when comparing two assembler files. */
582 int flag_verbose_asm = 1;
584 /* -dA causes debug commentary information to be produced in
585 the generated assembly code (to make it more readable). This option
586 is generally only of use to those who actually need to read the
587 generated assembly code (perhaps while debugging the compiler itself).
588 Currently, this switch is only used by dwarfout.c; however, it is intended
589 to be a catchall for printing debug information in the assembler file. */
591 int flag_debug_asm = 0;
593 /* -fgnu-linker specifies use of the GNU linker for initializations.
594 (Or, more generally, a linker that handles initializations.)
595 -fno-gnu-linker says that collect2 will be used. */
597 int flag_gnu_linker = 0;
599 int flag_gnu_linker = 1;
602 /* Tag all structures with __attribute__(packed) */
603 int flag_pack_struct = 0;
605 /* Emit code to check for stack overflow; also may cause large objects
606 to be allocated dynamically. */
607 int flag_stack_check;
609 /* -fcheck-memory-usage causes extra code to be generated in order to check
610 memory accesses. This is used by a detector of bad memory accesses such
612 int flag_check_memory_usage = 0;
614 /* -fprefix-function-name causes function name to be prefixed. This
615 can be used with -fcheck-memory-usage to isolate code compiled with
616 -fcheck-memory-usage. */
617 int flag_prefix_function_name = 0;
619 /* 1 if alias checking is on (by default, when -O). */
620 int flag_alias_check = 0;
622 /* 0 if pointer arguments may alias each other. True in C.
623 1 if pointer arguments may not alias each other but may alias
625 2 if pointer arguments may not alias each other and may not
626 alias global variables. True in Fortran.
627 This defaults to 0 for C. */
628 int flag_argument_noalias = 0;
630 /* Table of language-independent -f options.
631 STRING is the option name. VARIABLE is the address of the variable.
632 ON_VALUE is the value to store in VARIABLE
633 if `-fSTRING' is seen as an option.
634 (If `-fno-STRING' is seen as an option, the opposite value is stored.) */
636 struct { char *string; int *variable; int on_value;} f_options[] =
638 {"float-store", &flag_float_store, 1},
639 {"volatile", &flag_volatile, 1},
640 {"volatile-global", &flag_volatile_global, 1},
641 {"defer-pop", &flag_defer_pop, 1},
642 {"omit-frame-pointer", &flag_omit_frame_pointer, 1},
643 {"cse-follow-jumps", &flag_cse_follow_jumps, 1},
644 {"cse-skip-blocks", &flag_cse_skip_blocks, 1},
645 {"expensive-optimizations", &flag_expensive_optimizations, 1},
646 {"thread-jumps", &flag_thread_jumps, 1},
647 {"strength-reduce", &flag_strength_reduce, 1},
648 {"unroll-loops", &flag_unroll_loops, 1},
649 {"unroll-all-loops", &flag_unroll_all_loops, 1},
650 {"writable-strings", &flag_writable_strings, 1},
651 {"peephole", &flag_no_peephole, 0},
652 {"force-mem", &flag_force_mem, 1},
653 {"force-addr", &flag_force_addr, 1},
654 {"function-cse", &flag_no_function_cse, 0},
655 {"inline-functions", &flag_inline_functions, 1},
656 {"keep-inline-functions", &flag_keep_inline_functions, 1},
657 {"inline", &flag_no_inline, 0},
658 {"keep-static-consts", &flag_keep_static_consts, 1},
659 {"syntax-only", &flag_syntax_only, 1},
660 {"shared-data", &flag_shared_data, 1},
661 {"caller-saves", &flag_caller_saves, 1},
662 {"pcc-struct-return", &flag_pcc_struct_return, 1},
663 {"reg-struct-return", &flag_pcc_struct_return, 0},
664 {"delayed-branch", &flag_delayed_branch, 1},
665 {"rerun-cse-after-loop", &flag_rerun_cse_after_loop, 1},
666 {"pretend-float", &flag_pretend_float, 1},
667 {"schedule-insns", &flag_schedule_insns, 1},
668 {"schedule-insns2", &flag_schedule_insns_after_reload, 1},
669 {"pic", &flag_pic, 1},
670 {"PIC", &flag_pic, 2},
671 {"exceptions", &flag_exceptions, 1},
672 {"sjlj-exceptions", &exceptions_via_longjmp, 1},
673 {"asynchronous-exceptions", &asynchronous_exceptions, 1},
674 {"profile-arcs", &profile_arc_flag, 1},
675 {"test-coverage", &flag_test_coverage, 1},
676 {"branch-probabilities", &flag_branch_probabilities, 1},
677 {"fast-math", &flag_fast_math, 1},
678 {"common", &flag_no_common, 0},
679 {"inhibit-size-directive", &flag_inhibit_size_directive, 1},
680 {"function-sections", &flag_function_sections, 1},
681 {"verbose-asm", &flag_verbose_asm, 1},
682 {"gnu-linker", &flag_gnu_linker, 1},
683 {"pack-struct", &flag_pack_struct, 1},
684 {"stack-check", &flag_stack_check, 1},
685 {"bytecode", &output_bytecode, 1},
686 {"alias-check", &flag_alias_check, 1},
687 {"argument-alias", &flag_argument_noalias, 0},
688 {"argument-noalias", &flag_argument_noalias, 1},
689 {"argument-noalias-global", &flag_argument_noalias, 2},
690 {"check-memory-usage", &flag_check_memory_usage, 1},
691 {"prefix-function-name", &flag_prefix_function_name, 1}
694 /* Table of language-specific options. */
696 char *lang_options[] =
699 "-fallow-single-precision",
701 "-fsigned-bitfields",
702 "-funsigned-bitfields",
703 "-fno-signed-bitfields",
704 "-fno-unsigned-bitfields",
708 "-fno-unsigned-char",
724 "-fno-cond-mismatch",
725 "-fdollars-in-identifiers",
726 "-fno-dollars-in-identifiers",
735 "-Wbad-function-cast",
736 "-Wno-bad-function-cast",
740 "-Wno-char-subscripts",
756 "-Wno-missing-braces",
757 "-Wmissing-declarations",
758 "-Wno-missing-declarations",
759 "-Wmissing-prototypes",
760 "-Wno-missing-prototypes",
762 "-Wno-nested-externs",
766 "-Wno-pointer-arith",
768 "-Wno-redundant-decls",
771 "-Wstrict-prototypes",
772 "-Wno-strict-prototypes",
780 "-Wno-write-strings",
782 /* these are for obj c */
798 /* Options controlling warnings */
800 /* Don't print warning messages. -w. */
802 int inhibit_warnings = 0;
804 /* Print various extra warnings. -W. */
806 int extra_warnings = 0;
808 /* Treat warnings as errors. -Werror. */
810 int warnings_are_errors = 0;
812 /* Nonzero to warn about unused local variables. */
816 /* Nonzero to warn about variables used before they are initialized. */
818 int warn_uninitialized;
820 /* Nonzero means warn about all declarations which shadow others. */
824 /* Warn if a switch on an enum fails to have a case for every enum value. */
828 /* Nonzero means warn about function definitions that default the return type
829 or that use a null return and have a return-type other than void. */
831 int warn_return_type;
833 /* Nonzero means warn about pointer casts that increase the required
834 alignment of the target type (and might therefore lead to a crash
835 due to a misaligned access). */
839 /* Nonzero means warn about any identifiers that match in the first N
840 characters. The value N is in `id_clash_len'. */
843 unsigned id_clash_len;
845 /* Nonzero means warn about any objects definitions whose size is larger
846 than N bytes. Also want about function definitions whose returned
847 values are larger than N bytes. The value N is in `larger_than_size'. */
849 int warn_larger_than;
850 unsigned larger_than_size;
852 /* Nonzero means warn if inline function is too large. */
856 /* Warn if a function returns an aggregate,
857 since there are often incompatible calling conventions for doing this. */
859 int warn_aggregate_return;
861 /* Likewise for -W. */
863 struct { char *string; int *variable; int on_value;} W_options[] =
865 {"unused", &warn_unused, 1},
866 {"error", &warnings_are_errors, 1},
867 {"shadow", &warn_shadow, 1},
868 {"switch", &warn_switch, 1},
869 {"aggregate-return", &warn_aggregate_return, 1},
870 {"cast-align", &warn_cast_align, 1},
871 {"uninitialized", &warn_uninitialized, 1},
872 {"inline", &warn_inline, 1}
875 /* Output files for assembler code (real compiler output)
876 and debugging dumps. */
881 FILE *jump_opt_dump_file;
883 FILE *loop_dump_file;
884 FILE *cse2_dump_file;
885 FILE *branch_prob_dump_file;
886 FILE *flow_dump_file;
887 FILE *combine_dump_file;
888 FILE *sched_dump_file;
889 FILE *local_reg_dump_file;
890 FILE *global_reg_dump_file;
891 FILE *sched2_dump_file;
892 FILE *jump2_opt_dump_file;
893 FILE *dbr_sched_dump_file;
894 FILE *stack_reg_dump_file;
896 /* Time accumulators, to count the total time spent in various passes. */
900 int integration_time;
905 int branch_prob_time;
909 int local_alloc_time;
910 int global_alloc_time;
913 int shorten_branch_time;
919 /* Return time used so far, in microseconds. */
929 struct rusage rusage;
934 int proc_system_time;
936 int child_system_time;
948 return (clock() * 1000);
949 #else /* not _WIN32 */
952 return (tms.tms_utime + tms.tms_stime) * (1000000 / HZ);
955 getrusage (0, &rusage);
956 return (rusage.ru_utime.tv_sec * 1000000 + rusage.ru_utime.tv_usec
957 + rusage.ru_stime.tv_sec * 1000000 + rusage.ru_stime.tv_usec);
960 return (vms_times.proc_user_time + vms_times.proc_system_time) * 10000;
966 #define TIMEVAR(VAR, BODY) \
967 do { int otime = get_run_time (); BODY; VAR += get_run_time () - otime; } while (0)
970 print_time (str, total)
975 "time in %s: %d.%06d\n",
976 str, total / 1000000, total % 1000000);
979 /* Count an error or warning. Return 1 if the message should be printed. */
982 count_error (warningp)
985 if (warningp && inhibit_warnings)
988 if (warningp && !warnings_are_errors)
992 static int warning_message = 0;
994 if (warningp && !warning_message)
996 fprintf (stderr, "%s: warnings being treated as errors\n", progname);
1005 /* Print a fatal error message. NAME is the text.
1006 Also include a system error message based on `errno'. */
1009 pfatal_with_name (name)
1012 fprintf (stderr, "%s: ", progname);
1014 exit (FATAL_EXIT_CODE);
1018 fatal_io_error (name)
1021 fprintf (stderr, "%s: %s: I/O error\n", progname, name);
1022 exit (FATAL_EXIT_CODE);
1025 /* Called to give a better error message for a bad insn rather than
1026 just calling abort(). */
1029 fatal_insn (message, insn)
1033 if (!output_bytecode)
1039 fflush (asm_out_file);
1041 fflush (aux_info_file);
1043 fflush (rtl_dump_file);
1044 if (jump_opt_dump_file)
1045 fflush (jump_opt_dump_file);
1047 fflush (cse_dump_file);
1049 fflush (loop_dump_file);
1051 fflush (cse2_dump_file);
1053 fflush (flow_dump_file);
1054 if (combine_dump_file)
1055 fflush (combine_dump_file);
1056 if (sched_dump_file)
1057 fflush (sched_dump_file);
1058 if (local_reg_dump_file)
1059 fflush (local_reg_dump_file);
1060 if (global_reg_dump_file)
1061 fflush (global_reg_dump_file);
1062 if (sched2_dump_file)
1063 fflush (sched2_dump_file);
1064 if (jump2_opt_dump_file)
1065 fflush (jump2_opt_dump_file);
1066 if (dbr_sched_dump_file)
1067 fflush (dbr_sched_dump_file);
1068 if (stack_reg_dump_file)
1069 fflush (stack_reg_dump_file);
1075 /* Called to give a better error message when we don't have an insn to match
1076 what we are looking for or if the insn's constraints aren't satisfied,
1077 rather than just calling abort(). */
1080 fatal_insn_not_found (insn)
1083 if (INSN_CODE (insn) < 0)
1084 fatal_insn ("internal error--unrecognizable insn:", insn);
1086 fatal_insn ("internal error--insn does not satisfy its constraints:", insn);
1089 /* This is the default decl_printable_name function. */
1092 decl_name (decl, verbosity)
1096 return IDENTIFIER_POINTER (DECL_NAME (decl));
1099 static int need_error_newline;
1101 /* Function of last error message;
1102 more generally, function such that if next error message is in it
1103 then we don't have to mention the function name. */
1104 static tree last_error_function = NULL;
1106 /* Used to detect when input_file_stack has changed since last described. */
1107 static int last_error_tick;
1109 /* Called when the start of a function definition is parsed,
1110 this function prints on stderr the name of the function. */
1113 announce_function (decl)
1118 if (rtl_dump_and_exit)
1119 fprintf (stderr, "%s ", IDENTIFIER_POINTER (DECL_NAME (decl)));
1121 fprintf (stderr, " %s", (*decl_printable_name) (decl, 2));
1123 need_error_newline = 1;
1124 last_error_function = current_function_decl;
1128 /* The default function to print out name of current function that caused
1132 default_print_error_function (file)
1135 if (last_error_function != current_function_decl)
1137 char *kind = "function";
1138 if (current_function_decl != 0
1139 && TREE_CODE (TREE_TYPE (current_function_decl)) == METHOD_TYPE)
1143 fprintf (stderr, "%s: ", file);
1145 if (current_function_decl == NULL)
1146 fprintf (stderr, "At top level:\n");
1149 char *name = (*decl_printable_name) (current_function_decl, 2);
1150 fprintf (stderr, "In %s `%s':\n", kind, name);
1153 last_error_function = current_function_decl;
1157 /* Called by report_error_function to print out function name.
1158 * Default may be overridden by language front-ends. */
1160 void (*print_error_function) PROTO((char *)) = default_print_error_function;
1162 /* Prints out, if necessary, the name of the current function
1163 that caused an error. Called from all error and warning functions. */
1166 report_error_function (file)
1169 struct file_stack *p;
1171 if (need_error_newline)
1173 fprintf (stderr, "\n");
1174 need_error_newline = 0;
1177 (*print_error_function) (file);
1179 if (input_file_stack && input_file_stack->next != 0
1180 && input_file_stack_tick != last_error_tick
1181 && file == input_filename)
1183 fprintf (stderr, "In file included");
1184 for (p = input_file_stack->next; p; p = p->next)
1186 fprintf (stderr, " from %s:%d", p->name, p->line);
1188 fprintf (stderr, ",\n ");
1190 fprintf (stderr, ":\n");
1191 last_error_tick = input_file_stack_tick;
1195 /* Print a message. */
1198 vmessage (prefix, s, ap)
1204 fprintf (stderr, "%s: ", prefix);
1207 vfprintf (stderr, s, ap);
1210 HOST_WIDE_INT v1 = va_arg(ap, HOST_WIDE_INT);
1211 HOST_WIDE_INT v2 = va_arg(ap, HOST_WIDE_INT);
1212 HOST_WIDE_INT v3 = va_arg(ap, HOST_WIDE_INT);
1213 HOST_WIDE_INT v4 = va_arg(ap, HOST_WIDE_INT);
1214 fprintf (stderr, s, v1, v2, v3, v4);
1219 /* Print a message relevant to line LINE of file FILE. */
1222 v_message_with_file_and_line (file, line, prefix, s, ap)
1230 fprintf (stderr, "%s:%d: ", file, line);
1232 fprintf (stderr, "%s: ", progname);
1234 vmessage (prefix, s, ap);
1235 fputc ('\n', stderr);
1238 /* Print a message relevant to the given DECL. */
1241 v_message_with_decl (decl, prefix, s, ap)
1249 fprintf (stderr, "%s:%d: ",
1250 DECL_SOURCE_FILE (decl), DECL_SOURCE_LINE (decl));
1253 fprintf (stderr, "%s: ", prefix);
1255 /* Do magic to get around lack of varargs support for insertion
1256 of arguments into existing list. We know that the decl is first;
1257 we ass_u_me that it will be printed with "%s". */
1259 for (p = s; *p; ++p)
1263 if (*(p + 1) == '%')
1270 if (p > s) /* Print the left-hand substring. */
1272 char fmt[sizeof "%.255s"];
1275 if (width > 255L) width = 255L; /* arbitrary */
1276 sprintf (fmt, "%%.%lds", width);
1277 fprintf (stderr, fmt, s);
1280 if (*p == '%') /* Print the name. */
1282 char *n = (DECL_NAME (decl)
1283 ? (*decl_printable_name) (decl, 2)
1289 if (isalpha (*(p - 1) & 0xFF))
1294 if (*p) /* Print the rest of the message. */
1295 vmessage ((char *)NULL, p, ap);
1297 fputc ('\n', stderr);
1300 /* Figure file and line of the given INSN. */
1303 file_and_line_for_asm (insn, pfile, pline)
1308 rtx body = PATTERN (insn);
1311 /* Find the (or one of the) ASM_OPERANDS in the insn. */
1312 if (GET_CODE (body) == SET && GET_CODE (SET_SRC (body)) == ASM_OPERANDS)
1313 asmop = SET_SRC (body);
1314 else if (GET_CODE (body) == ASM_OPERANDS)
1316 else if (GET_CODE (body) == PARALLEL
1317 && GET_CODE (XVECEXP (body, 0, 0)) == SET)
1318 asmop = SET_SRC (XVECEXP (body, 0, 0));
1319 else if (GET_CODE (body) == PARALLEL
1320 && GET_CODE (XVECEXP (body, 0, 0)) == ASM_OPERANDS)
1321 asmop = XVECEXP (body, 0, 0);
1327 *pfile = ASM_OPERANDS_SOURCE_FILE (asmop);
1328 *pline = ASM_OPERANDS_SOURCE_LINE (asmop);
1332 *pfile = input_filename;
1337 /* Report an error at line LINE of file FILE. */
1340 v_error_with_file_and_line (file, line, s, ap)
1347 report_error_function (file);
1348 v_message_with_file_and_line (file, line, (char *)NULL, s, ap);
1352 error_with_file_and_line VPROTO((char *file, int line, char *s, ...))
1364 file = va_arg (ap, char *);
1365 line = va_arg (ap, int);
1366 s = va_arg (ap, char *);
1369 v_error_with_file_and_line (file, line, s, ap);
1373 /* Report an error at the declaration DECL.
1374 S is a format string which uses %s to substitute the declaration
1375 name; subsequent substitutions are a la printf. */
1378 v_error_with_decl (decl, s, ap)
1384 report_error_function (DECL_SOURCE_FILE (decl));
1385 v_message_with_decl (decl, (char *)NULL, s, ap);
1389 error_with_decl VPROTO((tree decl, char *s, ...))
1400 decl = va_arg (ap, tree);
1401 s = va_arg (ap, char *);
1404 v_error_with_decl (decl, s, ap);
1408 /* Report an error at the line number of the insn INSN.
1409 This is used only when INSN is an `asm' with operands,
1410 and each ASM_OPERANDS records its own source file and line. */
1413 v_error_for_asm (insn, s, ap)
1422 file_and_line_for_asm (insn, &file, &line);
1423 report_error_function (file);
1424 v_message_with_file_and_line (file, line, (char *)NULL, s, ap);
1428 error_for_asm VPROTO((rtx insn, char *s, ...))
1439 insn = va_arg (ap, rtx);
1440 s = va_arg (ap, char *);
1443 v_error_for_asm (insn, s, ap);
1447 /* Report an error at the current line number. */
1454 v_error_with_file_and_line (input_filename, lineno, s, ap);
1458 error VPROTO((char *s, ...))
1468 s = va_arg (ap, char *);
1475 /* Report a fatal error at the current line number. */
1483 exit (FATAL_EXIT_CODE);
1487 fatal VPROTO((char *s, ...))
1497 s = va_arg (ap, char *);
1504 /* Report a warning at line LINE of file FILE. */
1507 v_warning_with_file_and_line (file, line, s, ap)
1513 if (count_error (1))
1515 report_error_function (file);
1516 v_message_with_file_and_line (file, line, "warning", s, ap);
1521 warning_with_file_and_line VPROTO((char *file, int line, char *s, ...))
1533 file = va_arg (ap, char *);
1534 line = va_arg (ap, int);
1535 s = va_arg (ap, char *);
1538 v_warning_with_file_and_line (file, line, s, ap);
1542 /* Report a warning at the declaration DECL.
1543 S is a format string which uses %s to substitute the declaration
1544 name; subsequent substitutions are a la printf. */
1547 v_warning_with_decl (decl, s, ap)
1552 if (count_error (1))
1554 report_error_function (DECL_SOURCE_FILE (decl));
1555 v_message_with_decl (decl, "warning", s, ap);
1560 warning_with_decl VPROTO((tree decl, char *s, ...))
1571 decl = va_arg (ap, tree);
1572 s = va_arg (ap, char *);
1575 v_warning_with_decl (decl, s, ap);
1579 /* Report a warning at the line number of the insn INSN.
1580 This is used only when INSN is an `asm' with operands,
1581 and each ASM_OPERANDS records its own source file and line. */
1584 v_warning_for_asm (insn, s, ap)
1589 if (count_error (1))
1594 file_and_line_for_asm (insn, &file, &line);
1595 report_error_function (file);
1596 v_message_with_file_and_line (file, line, "warning", s, ap);
1601 warning_for_asm VPROTO((rtx insn, char *s, ...))
1612 insn = va_arg (ap, rtx);
1613 s = va_arg (ap, char *);
1616 v_warning_for_asm (insn, s, ap);
1620 /* Report a warning at the current line number. */
1627 v_warning_with_file_and_line (input_filename, lineno, s, ap);
1631 warning VPROTO((char *s, ...))
1641 s = va_arg (ap, char *);
1648 /* These functions issue either warnings or errors depending on
1649 -pedantic-errors. */
1656 if (flag_pedantic_errors)
1663 pedwarn VPROTO((char *s, ...))
1673 s = va_arg (ap, char *);
1681 v_pedwarn_with_decl (decl, s, ap)
1686 /* We don't want -pedantic-errors to cause the compilation to fail from
1687 "errors" in system header files. Sometimes fixincludes can't fix what's
1688 broken (eg: unsigned char bitfields - fixing it may change the alignment
1689 which will cause programs to mysteriously fail because the C library
1690 or kernel uses the original layout). There's no point in issuing a
1691 warning either, it's just unnecessary noise. */
1693 if (! DECL_IN_SYSTEM_HEADER (decl))
1695 if (flag_pedantic_errors)
1696 v_error_with_decl (decl, s, ap);
1698 v_warning_with_decl (decl, s, ap);
1703 pedwarn_with_decl VPROTO((tree decl, char *s, ...))
1714 decl = va_arg (ap, tree);
1715 s = va_arg (ap, char *);
1718 v_pedwarn_with_decl (decl, s, ap);
1723 v_pedwarn_with_file_and_line (file, line, s, ap)
1729 if (flag_pedantic_errors)
1730 v_error_with_file_and_line (file, line, s, ap);
1732 v_warning_with_file_and_line (file, line, s, ap);
1736 pedwarn_with_file_and_line VPROTO((char *file, int line, char *s, ...))
1748 file = va_arg (ap, char *);
1749 line = va_arg (ap, int);
1750 s = va_arg (ap, char *);
1753 v_pedwarn_with_file_and_line (file, line, s, ap);
1757 /* Apologize for not implementing some feature. */
1766 fprintf (stderr, "%s:%d: ", input_filename, lineno);
1768 fprintf (stderr, "%s: ", progname);
1769 vmessage ("sorry, not implemented", s, ap);
1770 fputc ('\n', stderr);
1774 sorry VPROTO((char *s, ...))
1784 s = va_arg (ap, char *);
1791 /* Apologize for not implementing some feature, then quit. */
1794 v_really_sorry (s, ap)
1800 fprintf (stderr, "%s:%d: ", input_filename, lineno);
1802 fprintf (stderr, "%s: ", progname);
1803 vmessage ("sorry, not implemented", s, ap);
1804 fatal (" (fatal)\n");
1808 really_sorry VPROTO((char *s, ...))
1818 s = va_arg (ap, char *);
1821 v_really_sorry (s, ap);
1825 /* More 'friendly' abort that prints the line and file.
1826 config.h can #define abort fancy_abort if you like that sort of thing.
1828 I don't think this is actually a good idea.
1829 Other sorts of crashes will look a certain way.
1830 It is a good thing if crashes from calling abort look the same way.
1836 fatal ("internal gcc abort");
1839 /* This calls abort and is used to avoid problems when abort if a macro.
1840 It is used when we need to pass the address of abort. */
1848 /* When `malloc.c' is compiled with `rcheck' defined,
1849 it calls this function to report clobberage. */
1857 /* Same as `malloc' but report error if no memory available. */
1863 register char *value = (char *) malloc (size);
1864 if (value == 0 && size != 0)
1865 fatal ("virtual memory exhausted");
1869 /* Same as `realloc' but report error if no memory available. */
1872 xrealloc (ptr, size)
1876 char *result = (char *) realloc (ptr, size);
1878 fatal ("virtual memory exhausted");
1882 /* Same as `strdup' but report error if no memory available. */
1888 register char *result = (char *) malloc (strlen (s) + 1);
1891 fatal ("virtual memory exhausted");
1896 /* Return the logarithm of X, base 2, considering X unsigned,
1897 if X is a power of 2. Otherwise, returns -1.
1899 This should be used via the `exact_log2' macro. */
1903 register unsigned HOST_WIDE_INT x;
1905 register int log = 0;
1906 /* Test for 0 or a power of 2. */
1907 if (x == 0 || x != (x & -x))
1909 while ((x >>= 1) != 0)
1914 /* Given X, an unsigned number, return the largest int Y such that 2**Y <= X.
1915 If X is 0, return -1.
1917 This should be used via the floor_log2 macro. */
1921 register unsigned HOST_WIDE_INT x;
1923 register int log = -1;
1930 static int float_handler_set;
1932 jmp_buf float_handler;
1934 /* Signals actually come here. */
1937 float_signal (signo)
1938 /* If this is missing, some compilers complain. */
1941 if (float_handled == 0)
1943 #if defined (USG) || defined (hpux)
1944 signal (SIGFPE, float_signal); /* re-enable the signal catcher */
1947 signal (SIGFPE, float_signal);
1948 longjmp (float_handler, 1);
1951 /* Specify where to longjmp to when a floating arithmetic error happens.
1952 If HANDLER is 0, it means don't handle the errors any more. */
1955 set_float_handler (handler)
1958 float_handled = (handler != 0);
1960 bcopy ((char *) handler, (char *) float_handler, sizeof (float_handler));
1962 if (float_handled && ! float_handler_set)
1964 signal (SIGFPE, float_signal);
1965 float_handler_set = 1;
1969 /* Specify, in HANDLER, where to longjmp to when a floating arithmetic
1970 error happens, pushing the previous specification into OLD_HANDLER.
1971 Return an indication of whether there was a previous handler in effect. */
1974 push_float_handler (handler, old_handler)
1975 jmp_buf handler, old_handler;
1977 int was_handled = float_handled;
1981 bcopy ((char *) float_handler, (char *) old_handler,
1982 sizeof (float_handler));
1984 bcopy ((char *) handler, (char *) float_handler, sizeof (float_handler));
1988 /* Restore the previous specification of whether and where to longjmp to
1989 when a floating arithmetic error happens. */
1992 pop_float_handler (handled, handler)
1996 float_handled = handled;
1998 bcopy ((char *) handler, (char *) float_handler, sizeof (float_handler));
2001 /* Handler for SIGPIPE. */
2005 /* If this is missing, some compilers complain. */
2008 fatal ("output pipe has been closed");
2011 /* Strip off a legitimate source ending from the input string NAME of
2012 length LEN. Rather than having to know the names used by all of
2013 our front ends, we strip off an ending of a period followed by one,
2014 two, or three characters. */
2017 strip_off_ending (name, len)
2021 if (len > 2 && name[len - 2] == '.')
2022 name[len - 2] = '\0';
2023 else if (len > 3 && name[len - 3] == '.')
2024 name[len - 3] = '\0';
2025 else if (len > 4 && name[len - 4] == '.')
2026 name[len - 4] = '\0';
2029 /* Output a quoted string. */
2032 output_quoted_string (asm_file, string)
2038 putc ('\"', asm_file);
2039 while ((c = *string++) != 0)
2041 if (c == '\"' || c == '\\')
2042 putc ('\\', asm_file);
2045 putc ('\"', asm_file);
2048 /* Output a file name in the form wanted by System V. */
2051 output_file_directive (asm_file, input_name)
2055 int len = strlen (input_name);
2056 char *na = input_name + len;
2058 /* NA gets INPUT_NAME sans directory names. */
2059 while (na > input_name)
2066 #ifdef ASM_OUTPUT_MAIN_SOURCE_FILENAME
2067 ASM_OUTPUT_MAIN_SOURCE_FILENAME (asm_file, na);
2069 #ifdef ASM_OUTPUT_SOURCE_FILENAME
2070 ASM_OUTPUT_SOURCE_FILENAME (asm_file, na);
2072 fprintf (asm_file, "\t.file\t");
2073 output_quoted_string (asm_file, na);
2074 fputc ('\n', asm_file);
2079 /* Routine to build language identifier for object file. */
2082 output_lang_identify (asm_out_file)
2085 int len = strlen (lang_identify ()) + sizeof ("__gnu_compiled_") + 1;
2086 char *s = (char *) alloca (len);
2087 sprintf (s, "__gnu_compiled_%s", lang_identify ());
2088 ASM_OUTPUT_LABEL (asm_out_file, s);
2091 /* Routine to open a dump file. */
2094 open_dump_file (base_name, suffix)
2099 char *dumpname = (char *) alloca (strlen (base_name) + strlen (suffix) + 1);
2101 strcpy (dumpname, base_name);
2102 strcat (dumpname, suffix);
2103 f = fopen (dumpname, "w");
2105 pfatal_with_name (dumpname);
2109 /* Compile an entire file of output from cpp, named NAME.
2110 Write a file of assembly output and various debugging dumps. */
2119 int name_specified = name != 0;
2121 if (dump_base_name == 0)
2122 dump_base_name = name ? name : "gccdump";
2126 integration_time = 0;
2131 branch_prob_time = 0;
2135 local_alloc_time = 0;
2136 global_alloc_time = 0;
2139 shorten_branch_time = 0;
2146 /* Open input file. */
2148 if (name == 0 || !strcmp (name, "-"))
2154 finput = fopen (name, "r");
2156 pfatal_with_name (name);
2158 #ifdef IO_BUFFER_SIZE
2159 setvbuf (finput, (char *) xmalloc (IO_BUFFER_SIZE), _IOFBF, IO_BUFFER_SIZE);
2161 #endif /* !USE_CPPLIB */
2163 /* Initialize data in various passes. */
2172 /* Some of these really don't need to be called when generating bytecode,
2173 but the options would have to be parsed first to know that. -bson */
2175 init_emit_once (debug_info_level == DINFO_LEVEL_NORMAL
2176 || debug_info_level == DINFO_LEVEL_VERBOSE
2177 || flag_test_coverage);
2179 init_decl_processing ();
2187 if (flag_caller_saves)
2188 init_caller_save ();
2190 /* If auxiliary info generation is desired, open the output file.
2191 This goes in the same directory as the source file--unlike
2192 all the other output files. */
2193 if (flag_gen_aux_info)
2195 aux_info_file = fopen (aux_info_file_name, "w");
2196 if (aux_info_file == 0)
2197 pfatal_with_name (aux_info_file_name);
2200 /* If rtl dump desired, open the output file. */
2202 rtl_dump_file = open_dump_file (dump_base_name, ".rtl");
2204 /* If jump_opt dump desired, open the output file. */
2206 jump_opt_dump_file = open_dump_file (dump_base_name, ".jump");
2208 /* If cse dump desired, open the output file. */
2210 cse_dump_file = open_dump_file (dump_base_name, ".cse");
2212 /* If loop dump desired, open the output file. */
2214 loop_dump_file = open_dump_file (dump_base_name, ".loop");
2216 /* If cse2 dump desired, open the output file. */
2218 cse2_dump_file = open_dump_file (dump_base_name, ".cse2");
2220 /* If branch_prob dump desired, open the output file. */
2221 if (branch_prob_dump)
2222 branch_prob_dump_file = open_dump_file (dump_base_name, ".bp");
2224 /* If flow dump desired, open the output file. */
2226 flow_dump_file = open_dump_file (dump_base_name, ".flow");
2228 /* If combine dump desired, open the output file. */
2230 combine_dump_file = open_dump_file (dump_base_name, ".combine");
2232 /* If scheduling dump desired, open the output file. */
2234 sched_dump_file = open_dump_file (dump_base_name, ".sched");
2236 /* If local_reg dump desired, open the output file. */
2238 local_reg_dump_file = open_dump_file (dump_base_name, ".lreg");
2240 /* If global_reg dump desired, open the output file. */
2241 if (global_reg_dump)
2242 global_reg_dump_file = open_dump_file (dump_base_name, ".greg");
2244 /* If 2nd scheduling dump desired, open the output file. */
2246 sched2_dump_file = open_dump_file (dump_base_name, ".sched2");
2248 /* If jump2_opt dump desired, open the output file. */
2250 jump2_opt_dump_file = open_dump_file (dump_base_name, ".jump2");
2252 /* If dbr_sched dump desired, open the output file. */
2254 dbr_sched_dump_file = open_dump_file (dump_base_name, ".dbr");
2258 /* If stack_reg dump desired, open the output file. */
2260 stack_reg_dump_file = open_dump_file (dump_base_name, ".stack");
2264 /* Open assembler code output file. */
2266 if (! name_specified && asm_file_name == 0)
2267 asm_out_file = stdout;
2270 int len = strlen (dump_base_name);
2271 register char *dumpname = (char *) xmalloc (len + 6);
2272 strcpy (dumpname, dump_base_name);
2273 strip_off_ending (dumpname, len);
2274 strcat (dumpname, ".s");
2275 if (asm_file_name == 0)
2277 asm_file_name = (char *) xmalloc (strlen (dumpname) + 1);
2278 strcpy (asm_file_name, dumpname);
2280 if (!strcmp (asm_file_name, "-"))
2281 asm_out_file = stdout;
2283 asm_out_file = fopen (asm_file_name, "w");
2284 if (asm_out_file == 0)
2285 pfatal_with_name (asm_file_name);
2288 #ifdef IO_BUFFER_SIZE
2289 setvbuf (asm_out_file, (char *) xmalloc (IO_BUFFER_SIZE),
2290 _IOFBF, IO_BUFFER_SIZE);
2293 input_filename = name;
2295 /* Put an entry on the input file stack for the main input file. */
2297 = (struct file_stack *) xmalloc (sizeof (struct file_stack));
2298 input_file_stack->next = 0;
2299 input_file_stack->name = input_filename;
2301 /* Perform language-specific initialization.
2302 This may set main_input_filename. */
2305 /* If the input doesn't start with a #line, use the input name
2306 as the official input file name. */
2307 if (main_input_filename == 0)
2308 main_input_filename = name;
2310 if (!output_bytecode)
2312 ASM_FILE_START (asm_out_file);
2314 #ifdef ASM_COMMENT_START
2315 if (flag_verbose_asm)
2317 /* Print the list of options in effect. */
2318 print_version (asm_out_file, ASM_COMMENT_START);
2319 print_switch_values (asm_out_file, 0, MAX_LINE,
2320 ASM_COMMENT_START, " ", "\n");
2321 /* Add a blank line here so it appears in assembler output but not
2323 fprintf (asm_out_file, "\n");
2328 /* Output something to inform GDB that this compilation was by GCC. Also
2329 serves to tell GDB file consists of bytecodes. */
2330 if (output_bytecode)
2331 fprintf (asm_out_file, "bc_gcc2_compiled.:\n");
2334 #ifndef ASM_IDENTIFY_GCC
2335 fprintf (asm_out_file, "gcc2_compiled.:\n");
2337 ASM_IDENTIFY_GCC (asm_out_file);
2341 /* Output something to identify which front-end produced this file. */
2342 #ifdef ASM_IDENTIFY_LANGUAGE
2343 ASM_IDENTIFY_LANGUAGE (asm_out_file);
2346 #ifndef ASM_OUTPUT_SECTION_NAME
2347 if (flag_function_sections)
2349 warning ("-ffunction-sections not supported for this target.");
2350 flag_function_sections = 0;
2354 if (flag_function_sections
2355 && (profile_flag || profile_block_flag))
2357 warning ("-ffunction-sections disabled; it makes profiling impossible.");
2358 flag_function_sections = 0;
2361 if (flag_function_sections && write_symbols != NO_DEBUG)
2362 warning ("-ffunction-sections may affect debugging on some targets.");
2364 if (output_bytecode)
2366 if (profile_flag || profile_block_flag)
2367 error ("profiling not supported in bytecode compilation");
2371 /* ??? Note: There used to be a conditional here
2372 to call assemble_zeros without fail if DBX_DEBUGGING_INFO is defined.
2373 This was to guarantee separation between gcc_compiled. and
2374 the first function, for the sake of dbx on Suns.
2375 However, having the extra zero here confused the Emacs
2376 code for unexec, and might confuse other programs too.
2377 Therefore, I took out that change.
2378 In future versions we should find another way to solve
2379 that dbx problem. -- rms, 23 May 93. */
2381 /* Don't let the first function fall at the same address
2382 as gcc_compiled., if profiling. */
2383 if (profile_flag || profile_block_flag)
2384 assemble_zeros (UNITS_PER_WORD);
2387 /* If dbx symbol table desired, initialize writing it
2388 and output the predefined types. */
2389 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
2390 if (write_symbols == DBX_DEBUG || write_symbols == XCOFF_DEBUG)
2391 TIMEVAR (symout_time, dbxout_init (asm_out_file, main_input_filename,
2394 #ifdef SDB_DEBUGGING_INFO
2395 if (write_symbols == SDB_DEBUG)
2396 TIMEVAR (symout_time, sdbout_init (asm_out_file, main_input_filename,
2399 #ifdef DWARF_DEBUGGING_INFO
2400 if (write_symbols == DWARF_DEBUG)
2401 TIMEVAR (symout_time, dwarfout_init (asm_out_file, main_input_filename));
2403 #ifdef DWARF2_DEBUGGING_INFO
2404 if (write_symbols == DWARF2_DEBUG)
2405 TIMEVAR (symout_time, dwarf2out_init (asm_out_file, main_input_filename));
2408 /* Initialize yet another pass. */
2410 if (!output_bytecode)
2411 init_final (main_input_filename);
2412 init_branch_prob (dump_base_name);
2414 start_time = get_run_time ();
2416 /* Call the parser, which parses the entire file
2417 (calling rest_of_compilation for each function). */
2419 if (yyparse () != 0)
2421 if (errorcount == 0)
2422 fprintf (stderr, "Errors detected in input file (your bison.simple is out of date)");
2424 /* In case there were missing closebraces,
2425 get us back to the global binding level. */
2426 while (! global_bindings_p ())
2430 output_func_start_profiler ();
2432 /* Compilation is now finished except for writing
2433 what's left of the symbol table output. */
2435 parse_time += get_run_time () - start_time;
2437 parse_time -= integration_time;
2438 parse_time -= varconst_time;
2440 globals = getdecls ();
2442 /* Really define vars that have had only a tentative definition.
2443 Really output inline functions that must actually be callable
2444 and have not been output so far. */
2447 int len = list_length (globals);
2448 tree *vec = (tree *) alloca (sizeof (tree) * len);
2453 /* Process the decls in reverse order--earliest first.
2454 Put them into VEC from back to front, then take out from front. */
2456 for (i = 0, decl = globals; i < len; i++, decl = TREE_CHAIN (decl))
2457 vec[len - i - 1] = decl;
2459 for (i = 0; i < len; i++)
2463 /* We're not deferring this any longer. */
2464 DECL_DEFER_OUTPUT (decl) = 0;
2466 if (TREE_CODE (decl) == VAR_DECL && DECL_SIZE (decl) == 0
2467 && incomplete_decl_finalize_hook != 0)
2468 (*incomplete_decl_finalize_hook) (decl);
2471 /* Now emit any global variables or functions that we have been putting
2472 off. We need to loop in case one of the things emitted here
2473 references another one which comes earlier in the list. */
2477 for (i = 0; i < len; i++)
2481 if (TREE_ASM_WRITTEN (decl) || DECL_EXTERNAL (decl))
2484 /* Don't write out static consts, unless we still need them.
2486 We also keep static consts if not optimizing (for debugging),
2487 unless the user specified -fno-keep-static-consts.
2488 ??? They might be better written into the debug information.
2489 This is possible when using DWARF.
2491 A language processor that wants static constants to be always
2492 written out (even if it is not used) is responsible for
2493 calling rest_of_decl_compilation itself. E.g. the C front-end
2494 calls rest_of_decl_compilation from finish_decl.
2495 One motivation for this is that is conventional in some
2496 environments to write things like:
2497 static const char rcsid[] = "... version string ...";
2498 intending to force the string to be in the executable.
2500 A language processor that would prefer to have unneeded
2501 static constants "optimized away" would just defer writing
2502 them out until here. E.g. C++ does this, because static
2503 constants are often defined in header files.
2505 ??? A tempting alternative (for both C and C++) would be
2506 to force a constant to be written if and only if it is
2507 defined in a main file, as opposed to an include file. */
2509 if (TREE_CODE (decl) == VAR_DECL && TREE_STATIC (decl)
2510 && (! TREE_READONLY (decl)
2511 || TREE_PUBLIC (decl)
2512 || (!optimize && flag_keep_static_consts)
2513 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl))))
2516 rest_of_decl_compilation (decl, NULL_PTR, 1, 1);
2519 if (TREE_CODE (decl) == FUNCTION_DECL
2520 && DECL_INITIAL (decl) != 0
2521 && DECL_SAVED_INSNS (decl) != 0
2522 && (flag_keep_inline_functions
2523 || TREE_PUBLIC (decl)
2524 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl))))
2527 temporary_allocation ();
2528 output_inline_function (decl);
2529 permanent_allocation (1);
2534 /* Now that all possible functions have been output, we can dump
2535 the exception table. */
2537 if (exception_table_p ())
2538 output_exception_table ();
2540 for (i = 0; i < len; i++)
2544 if (TREE_CODE (decl) == VAR_DECL && TREE_STATIC (decl)
2545 && ! TREE_ASM_WRITTEN (decl))
2546 /* Cancel the RTL for this decl so that, if debugging info
2547 output for global variables is still to come,
2548 this one will be omitted. */
2549 DECL_RTL (decl) = NULL;
2551 /* Warn about any function
2552 declared static but not defined.
2553 We don't warn about variables,
2554 because many programs have static variables
2555 that exist only to get some text into the object file. */
2556 if (TREE_CODE (decl) == FUNCTION_DECL
2558 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl)))
2559 && DECL_INITIAL (decl) == 0
2560 && DECL_EXTERNAL (decl)
2561 && ! DECL_ARTIFICIAL (decl)
2562 && ! TREE_PUBLIC (decl))
2564 pedwarn_with_decl (decl,
2565 "`%s' declared `static' but never defined");
2566 /* This symbol is effectively an "extern" declaration now. */
2567 TREE_PUBLIC (decl) = 1;
2568 assemble_external (decl);
2571 /* Warn about static fns or vars defined but not used,
2572 but not about inline functions or static consts
2573 since defining those in header files is normal practice. */
2575 && ((TREE_CODE (decl) == FUNCTION_DECL && ! DECL_INLINE (decl))
2576 || (TREE_CODE (decl) == VAR_DECL && ! TREE_READONLY (decl)))
2577 && ! DECL_IN_SYSTEM_HEADER (decl)
2578 && ! DECL_EXTERNAL (decl)
2579 && ! TREE_PUBLIC (decl)
2580 && ! TREE_USED (decl)
2581 && (TREE_CODE (decl) == FUNCTION_DECL || ! DECL_REGISTER (decl))
2582 /* The TREE_USED bit for file-scope decls
2583 is kept in the identifier, to handle multiple
2584 external decls in different scopes. */
2585 && ! TREE_USED (DECL_NAME (decl)))
2586 warning_with_decl (decl, "`%s' defined but not used");
2588 #ifdef SDB_DEBUGGING_INFO
2589 /* The COFF linker can move initialized global vars to the end.
2590 And that can screw up the symbol ordering.
2591 By putting the symbols in that order to begin with,
2592 we avoid a problem. mcsun!unido!fauern!tumuc!pes@uunet.uu.net. */
2593 if (write_symbols == SDB_DEBUG && TREE_CODE (decl) == VAR_DECL
2594 && TREE_PUBLIC (decl) && DECL_INITIAL (decl)
2595 && ! DECL_EXTERNAL (decl)
2596 && DECL_RTL (decl) != 0)
2597 TIMEVAR (symout_time, sdbout_symbol (decl, 0));
2599 /* Output COFF information for non-global
2600 file-scope initialized variables. */
2601 if (write_symbols == SDB_DEBUG
2602 && TREE_CODE (decl) == VAR_DECL
2603 && DECL_INITIAL (decl)
2604 && ! DECL_EXTERNAL (decl)
2605 && DECL_RTL (decl) != 0
2606 && GET_CODE (DECL_RTL (decl)) == MEM)
2607 TIMEVAR (symout_time, sdbout_toplevel_data (decl));
2608 #endif /* SDB_DEBUGGING_INFO */
2609 #ifdef DWARF_DEBUGGING_INFO
2610 /* Output DWARF information for file-scope tentative data object
2611 declarations, file-scope (extern) function declarations (which
2612 had no corresponding body) and file-scope tagged type declarations
2613 and definitions which have not yet been forced out. */
2615 if (write_symbols == DWARF_DEBUG
2616 && (TREE_CODE (decl) != FUNCTION_DECL || !DECL_INITIAL (decl)))
2617 TIMEVAR (symout_time, dwarfout_file_scope_decl (decl, 1));
2619 #ifdef DWARF2_DEBUGGING_INFO
2620 /* Output DWARF2 information for file-scope tentative data object
2621 declarations, file-scope (extern) function declarations (which
2622 had no corresponding body) and file-scope tagged type declarations
2623 and definitions which have not yet been forced out. */
2625 if (write_symbols == DWARF2_DEBUG
2626 && (TREE_CODE (decl) != FUNCTION_DECL || !DECL_INITIAL (decl)))
2627 TIMEVAR (symout_time, dwarf2out_decl (decl));
2632 /* Write out any pending weak symbol declarations. */
2636 /* Do dbx symbols */
2637 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
2638 if (write_symbols == DBX_DEBUG || write_symbols == XCOFF_DEBUG)
2639 TIMEVAR (symout_time,
2641 dbxout_finish (asm_out_file, main_input_filename);
2645 #ifdef DWARF_DEBUGGING_INFO
2646 if (write_symbols == DWARF_DEBUG)
2647 TIMEVAR (symout_time,
2653 #ifdef DWARF2_DEBUGGING_INFO
2654 if (write_symbols == DWARF2_DEBUG)
2655 TIMEVAR (symout_time,
2657 dwarf2out_finish ();
2661 /* Output some stuff at end of file if nec. */
2663 if (!output_bytecode)
2665 end_final (dump_base_name);
2666 end_branch_prob (branch_prob_dump_file);
2669 ASM_FILE_END (asm_out_file);
2673 /* Language-specific end of compilation actions. */
2677 if (output_bytecode)
2678 bc_write_file (asm_out_file);
2680 /* Close the dump files. */
2682 if (flag_gen_aux_info)
2684 fclose (aux_info_file);
2686 unlink (aux_info_file_name);
2690 fclose (rtl_dump_file);
2693 fclose (jump_opt_dump_file);
2696 fclose (cse_dump_file);
2699 fclose (loop_dump_file);
2702 fclose (cse2_dump_file);
2704 if (branch_prob_dump)
2705 fclose (branch_prob_dump_file);
2708 fclose (flow_dump_file);
2712 dump_combine_total_stats (combine_dump_file);
2713 fclose (combine_dump_file);
2717 fclose (sched_dump_file);
2720 fclose (local_reg_dump_file);
2722 if (global_reg_dump)
2723 fclose (global_reg_dump_file);
2726 fclose (sched2_dump_file);
2729 fclose (jump2_opt_dump_file);
2732 fclose (dbr_sched_dump_file);
2736 fclose (stack_reg_dump_file);
2739 /* Close non-debugging input and output files. Take special care to note
2740 whether fclose returns an error, since the pages might still be on the
2741 buffer chain while the file is open. */
2748 if (ferror (asm_out_file) != 0 || fclose (asm_out_file) != 0)
2749 fatal_io_error (asm_file_name);
2751 /* Print the times. */
2755 fprintf (stderr,"\n");
2756 print_time ("parse", parse_time);
2758 if (!output_bytecode)
2760 print_time ("integration", integration_time);
2761 print_time ("jump", jump_time);
2762 print_time ("cse", cse_time);
2763 print_time ("loop", loop_time);
2764 print_time ("cse2", cse2_time);
2765 print_time ("branch-prob", branch_prob_time);
2766 print_time ("flow", flow_time);
2767 print_time ("combine", combine_time);
2768 print_time ("sched", sched_time);
2769 print_time ("local-alloc", local_alloc_time);
2770 print_time ("global-alloc", global_alloc_time);
2771 print_time ("sched2", sched2_time);
2772 print_time ("dbranch", dbr_sched_time);
2773 print_time ("shorten-branch", shorten_branch_time);
2774 print_time ("stack-reg", stack_reg_time);
2775 print_time ("final", final_time);
2776 print_time ("varconst", varconst_time);
2777 print_time ("symout", symout_time);
2778 print_time ("dump", dump_time);
2783 /* This is called from various places for FUNCTION_DECL, VAR_DECL,
2784 and TYPE_DECL nodes.
2786 This does nothing for local (non-static) variables.
2787 Otherwise, it sets up the RTL and outputs any assembler code
2788 (label definition, storage allocation and initialization).
2790 DECL is the declaration. If ASMSPEC is nonzero, it specifies
2791 the assembler symbol name to be used. TOP_LEVEL is nonzero
2792 if this declaration is not within a function. */
2795 rest_of_decl_compilation (decl, asmspec, top_level, at_end)
2801 /* Declarations of variables, and of functions defined elsewhere. */
2803 /* The most obvious approach, to put an #ifndef around where
2804 this macro is used, doesn't work since it's inside a macro call. */
2805 #ifndef ASM_FINISH_DECLARE_OBJECT
2806 #define ASM_FINISH_DECLARE_OBJECT(FILE, DECL, TOP, END)
2809 /* Forward declarations for nested functions are not "external",
2810 but we need to treat them as if they were. */
2811 if (TREE_STATIC (decl) || DECL_EXTERNAL (decl)
2812 || TREE_CODE (decl) == FUNCTION_DECL)
2813 TIMEVAR (varconst_time,
2815 make_decl_rtl (decl, asmspec, top_level);
2816 /* Initialized extern variable exists to be replaced
2817 with its value, or represents something that will be
2818 output in another file. */
2819 if (! (TREE_CODE (decl) == VAR_DECL
2820 && DECL_EXTERNAL (decl) && TREE_READONLY (decl)
2821 && DECL_INITIAL (decl) != 0
2822 && DECL_INITIAL (decl) != error_mark_node))
2823 /* Don't output anything
2824 when a tentative file-scope definition is seen.
2825 But at end of compilation, do output code for them. */
2826 if (! (! at_end && top_level
2827 && (DECL_INITIAL (decl) == 0
2828 || DECL_INITIAL (decl) == error_mark_node)))
2829 assemble_variable (decl, top_level, at_end, 0);
2830 if (!output_bytecode
2831 && decl == last_assemble_variable_decl)
2833 ASM_FINISH_DECLARE_OBJECT (asm_out_file, decl,
2837 else if (DECL_REGISTER (decl) && asmspec != 0)
2839 if (decode_reg_name (asmspec) >= 0)
2841 DECL_RTL (decl) = 0;
2842 make_decl_rtl (decl, asmspec, top_level);
2845 error ("invalid register name `%s' for register variable", asmspec);
2847 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
2848 else if ((write_symbols == DBX_DEBUG || write_symbols == XCOFF_DEBUG)
2849 && TREE_CODE (decl) == TYPE_DECL)
2850 TIMEVAR (symout_time, dbxout_symbol (decl, 0));
2852 #ifdef SDB_DEBUGGING_INFO
2853 else if (write_symbols == SDB_DEBUG && top_level
2854 && TREE_CODE (decl) == TYPE_DECL)
2855 TIMEVAR (symout_time, sdbout_symbol (decl, 0));
2859 /* Called after finishing a record, union or enumeral type. */
2862 rest_of_type_compilation (type, toplev)
2866 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
2867 if (write_symbols == DBX_DEBUG || write_symbols == XCOFF_DEBUG)
2868 TIMEVAR (symout_time, dbxout_symbol (TYPE_STUB_DECL (type), !toplev));
2870 #ifdef SDB_DEBUGGING_INFO
2871 if (write_symbols == SDB_DEBUG)
2872 TIMEVAR (symout_time, sdbout_symbol (TYPE_STUB_DECL (type), !toplev));
2876 /* This is called from finish_function (within yyparse)
2877 after each top-level definition is parsed.
2878 It is supposed to compile that function or variable
2879 and output the assembler code for it.
2880 After we return, the tree storage is freed. */
2883 rest_of_compilation (decl)
2887 int start_time = get_run_time ();
2889 /* Nonzero if we have saved the original DECL_INITIAL of the function,
2890 to be restored after we finish compiling the function
2891 (for use when compiling inline calls to this function). */
2892 tree saved_block_tree = 0;
2893 /* Likewise, for DECL_ARGUMENTS. */
2894 tree saved_arguments = 0;
2897 if (output_bytecode)
2900 /* If we are reconsidering an inline function
2901 at the end of compilation, skip the stuff for making it inline. */
2903 if (DECL_SAVED_INSNS (decl) == 0)
2908 /* If requested, consider whether to make this function inline. */
2909 if (DECL_INLINE (decl) || flag_inline_functions)
2910 TIMEVAR (integration_time,
2912 lose = function_cannot_inline_p (decl);
2913 if (lose || ! optimize)
2915 if (warn_inline && DECL_INLINE (decl))
2916 warning_with_decl (decl, lose);
2917 DECL_ABSTRACT_ORIGIN (decl) = 0;
2918 /* Don't really compile an extern inline function.
2919 If we can't make it inline, pretend
2920 it was only declared. */
2921 if (DECL_EXTERNAL (decl))
2923 DECL_INITIAL (decl) = 0;
2924 goto exit_rest_of_compilation;
2928 /* ??? Note that this has the effect of making it look
2929 like "inline" was specified for a function if we choose
2930 to inline it. This isn't quite right, but it's
2931 probably not worth the trouble to fix. */
2932 inlineable = DECL_INLINE (decl) = 1;
2935 insns = get_insns ();
2937 /* Dump the rtl code if we are dumping rtl. */
2942 fprintf (rtl_dump_file, "\n;; Function %s\n\n",
2943 (*decl_printable_name) (decl, 2));
2944 if (DECL_SAVED_INSNS (decl))
2945 fprintf (rtl_dump_file, ";; (integrable)\n\n");
2946 print_rtl (rtl_dump_file, insns);
2947 fflush (rtl_dump_file);
2950 /* If function is inline, and we don't yet know whether to
2951 compile it by itself, defer decision till end of compilation.
2952 finish_compilation will call rest_of_compilation again
2953 for those functions that need to be output. Also defer those
2954 functions that we are supposed to defer. We cannot defer
2955 functions containing nested functions since the nested function
2956 data is in our non-saved obstack. */
2958 if (! current_function_contains_functions
2959 && (DECL_DEFER_OUTPUT (decl)
2960 || (DECL_INLINE (decl)
2961 && ((! TREE_PUBLIC (decl) && ! TREE_ADDRESSABLE (decl)
2962 && ! flag_keep_inline_functions)
2963 || DECL_EXTERNAL (decl)))))
2965 DECL_DEFER_OUTPUT (decl) = 1;
2967 /* If -Wreturn-type, we have to do a bit of compilation. */
2968 if (! warn_return_type)
2970 #ifdef DWARF_DEBUGGING_INFO
2971 /* Generate the DWARF info for the "abstract" instance
2972 of a function which we may later generate inlined and/or
2973 out-of-line instances of. */
2974 if (write_symbols == DWARF_DEBUG)
2976 set_decl_abstract_flags (decl, 1);
2977 TIMEVAR (symout_time, dwarfout_file_scope_decl (decl, 0));
2978 set_decl_abstract_flags (decl, 0);
2981 #ifdef DWARF2_DEBUGGING_INFO
2982 /* Generate the DWARF2 info for the "abstract" instance
2983 of a function which we may later generate inlined and/or
2984 out-of-line instances of. */
2985 if (write_symbols == DWARF2_DEBUG)
2987 set_decl_abstract_flags (decl, 1);
2988 TIMEVAR (symout_time, dwarf2out_decl (decl));
2989 set_decl_abstract_flags (decl, 0);
2992 TIMEVAR (integration_time, save_for_inline_nocopy (decl));
2993 RTX_INTEGRATED_P (DECL_SAVED_INSNS (decl)) = inlineable;
2994 goto exit_rest_of_compilation;
2998 /* If we have to compile the function now, save its rtl and subdecls
2999 so that its compilation will not affect what others get. */
3000 if (inlineable || DECL_DEFER_OUTPUT (decl))
3002 #ifdef DWARF_DEBUGGING_INFO
3003 /* Generate the DWARF info for the "abstract" instance of
3004 a function which we will generate an out-of-line instance
3005 of almost immediately (and which we may also later generate
3006 various inlined instances of). */
3007 if (write_symbols == DWARF_DEBUG)
3009 set_decl_abstract_flags (decl, 1);
3010 TIMEVAR (symout_time, dwarfout_file_scope_decl (decl, 0));
3011 set_decl_abstract_flags (decl, 0);
3014 #ifdef DWARF2_DEBUGGING_INFO
3015 /* Generate the DWARF2 info for the "abstract" instance of
3016 a function which we will generate an out-of-line instance
3017 of almost immediately (and which we may also later generate
3018 various inlined instances of). */
3019 if (write_symbols == DWARF2_DEBUG)
3021 set_decl_abstract_flags (decl, 1);
3022 TIMEVAR (symout_time, dwarf2out_decl (decl));
3023 set_decl_abstract_flags (decl, 0);
3026 saved_block_tree = DECL_INITIAL (decl);
3027 saved_arguments = DECL_ARGUMENTS (decl);
3028 TIMEVAR (integration_time, save_for_inline_copying (decl));
3029 RTX_INTEGRATED_P (DECL_SAVED_INSNS (decl)) = inlineable;
3032 /* If specified extern inline but we aren't inlining it, we are
3034 if (DECL_INLINE (decl) && DECL_EXTERNAL (decl))
3035 goto exit_rest_of_compilation;
3038 if (! DECL_DEFER_OUTPUT (decl))
3039 TREE_ASM_WRITTEN (decl) = 1;
3041 /* Now that integrate will no longer see our rtl, we need not distinguish
3042 between the return value of this function and the return value of called
3044 rtx_equal_function_value_matters = 0;
3046 /* Don't return yet if -Wreturn-type; we need to do jump_optimize. */
3047 if ((rtl_dump_and_exit || flag_syntax_only) && !warn_return_type)
3049 goto exit_rest_of_compilation;
3052 /* Add an unwinder for exception handling, if needed.
3053 This must be done before we finalize PIC code. */
3057 /* If we are doing position-independent code generation, now
3058 is the time to output special prologues and epilogues.
3059 We do not want to do this earlier, because it just clutters
3060 up inline functions with meaningless insns. */
3065 /* From now on, allocate rtl in current_obstack, not in saveable_obstack.
3066 Note that that may have been done above, in save_for_inline_copying.
3067 The call to resume_temporary_allocation near the end of this function
3068 goes back to the usual state of affairs. This must be done after
3069 we've built up any unwinders for exception handling, and done
3070 the FINALIZE_PIC work, if necessary. */
3072 rtl_in_current_obstack ();
3074 insns = get_insns ();
3076 /* Copy any shared structure that should not be shared. */
3078 unshare_all_rtl (insns);
3080 /* Instantiate all virtual registers. */
3082 instantiate_virtual_regs (current_function_decl, get_insns ());
3084 /* See if we have allocated stack slots that are not directly addressable.
3085 If so, scan all the insns and create explicit address computation
3086 for all references to such slots. */
3087 /* fixup_stack_slots (); */
3089 /* Find all the EH handlers. */
3090 find_exception_handler_labels ();
3092 /* Always do one jump optimization pass to ensure that JUMP_LABEL fields
3093 are initialized and to compute whether control can drop off the end
3095 TIMEVAR (jump_time, reg_scan (insns, max_reg_num (), 0));
3096 TIMEVAR (jump_time, jump_optimize (insns, 0, 0, 1));
3098 /* Now is when we stop if -fsyntax-only and -Wreturn-type. */
3099 if (rtl_dump_and_exit || flag_syntax_only || DECL_DEFER_OUTPUT (decl))
3100 goto exit_rest_of_compilation;
3102 /* Dump rtl code after jump, if we are doing that. */
3107 fprintf (jump_opt_dump_file, "\n;; Function %s\n\n",
3108 (*decl_printable_name) (decl, 2));
3109 print_rtl (jump_opt_dump_file, insns);
3110 fflush (jump_opt_dump_file);
3113 /* Perform common subexpression elimination.
3114 Nonzero value from `cse_main' means that jumps were simplified
3115 and some code may now be unreachable, so do
3116 jump optimization again. */
3121 fprintf (cse_dump_file, "\n;; Function %s\n\n",
3122 (*decl_printable_name) (decl, 2));
3127 TIMEVAR (cse_time, reg_scan (insns, max_reg_num (), 1));
3129 if (flag_thread_jumps)
3130 /* Hacks by tiemann & kenner. */
3131 TIMEVAR (jump_time, thread_jumps (insns, max_reg_num (), 1));
3133 TIMEVAR (cse_time, tem = cse_main (insns, max_reg_num (),
3135 TIMEVAR (cse_time, delete_dead_from_cse (insns, max_reg_num ()));
3137 if (tem || optimize > 1)
3138 TIMEVAR (jump_time, jump_optimize (insns, 0, 0, 0));
3141 /* Dump rtl code after cse, if we are doing that. */
3146 print_rtl (cse_dump_file, insns);
3147 fflush (cse_dump_file);
3153 fprintf (loop_dump_file, "\n;; Function %s\n\n",
3154 (*decl_printable_name) (decl, 2));
3157 /* Move constant computations out of loops. */
3163 loop_optimize (insns, loop_dump_file);
3167 /* Dump rtl code after loop opt, if we are doing that. */
3172 print_rtl (loop_dump_file, insns);
3173 fflush (loop_dump_file);
3179 fprintf (cse2_dump_file, "\n;; Function %s\n\n",
3180 (*decl_printable_name) (decl, 2));
3183 if (optimize > 0 && flag_rerun_cse_after_loop)
3185 /* Running another jump optimization pass before the second
3186 cse pass sometimes simplifies the RTL enough to allow
3187 the second CSE pass to do a better job. Jump_optimize can change
3188 max_reg_num so we must rerun reg_scan afterwards.
3189 ??? Rework to not call reg_scan so often. */
3190 TIMEVAR (jump_time, reg_scan (insns, max_reg_num (), 0));
3191 TIMEVAR (jump_time, jump_optimize (insns, 0, 0, 1));
3193 TIMEVAR (cse2_time, reg_scan (insns, max_reg_num (), 0));
3194 TIMEVAR (cse2_time, tem = cse_main (insns, max_reg_num (),
3195 1, cse2_dump_file));
3197 TIMEVAR (jump_time, jump_optimize (insns, 0, 0, 0));
3200 if (optimize > 0 && flag_thread_jumps)
3202 /* This pass of jump threading straightens out code
3203 that was kinked by loop optimization. */
3204 TIMEVAR (jump_time, reg_scan (insns, max_reg_num (), 0));
3205 TIMEVAR (jump_time, thread_jumps (insns, max_reg_num (), 0));
3207 /* Dump rtl code after cse, if we are doing that. */
3212 print_rtl (cse2_dump_file, insns);
3213 fflush (cse2_dump_file);
3216 if (branch_prob_dump)
3219 fprintf (branch_prob_dump_file, "\n;; Function %s\n\n",
3220 (*decl_printable_name) (decl, 2));
3223 if (profile_arc_flag || flag_test_coverage || flag_branch_probabilities)
3224 TIMEVAR (branch_prob_time,
3226 branch_prob (insns, branch_prob_dump_file);
3229 if (branch_prob_dump)
3232 print_rtl (branch_prob_dump_file, insns);
3233 fflush (branch_prob_dump_file);
3235 /* We are no longer anticipating cse in this function, at least. */
3237 cse_not_expected = 1;
3239 /* Now we choose between stupid (pcc-like) register allocation
3240 (if we got the -noreg switch and not -opt)
3241 and smart register allocation. */
3243 if (optimize > 0) /* Stupid allocation probably won't work */
3244 obey_regdecls = 0; /* if optimizations being done. */
3248 /* Print function header into flow dump now
3249 because doing the flow analysis makes some of the dump. */
3254 fprintf (flow_dump_file, "\n;; Function %s\n\n",
3255 (*decl_printable_name) (decl, 2));
3262 regclass (insns, max_reg_num ());
3263 stupid_life_analysis (insns, max_reg_num (),
3269 /* Do control and data flow analysis,
3270 and write some of the results to dump file. */
3272 TIMEVAR (flow_time, flow_analysis (insns, max_reg_num (),
3274 if (warn_uninitialized)
3276 uninitialized_vars_warning (DECL_INITIAL (decl));
3277 setjmp_args_warning ();
3281 /* Dump rtl after flow analysis. */
3286 print_rtl (flow_dump_file, insns);
3287 fflush (flow_dump_file);
3290 /* If -opt, try combining insns through substitution. */
3293 TIMEVAR (combine_time, combine_instructions (insns, max_reg_num ()));
3295 /* Dump rtl code after insn combination. */
3300 fprintf (combine_dump_file, "\n;; Function %s\n\n",
3301 (*decl_printable_name) (decl, 2));
3302 dump_combine_stats (combine_dump_file);
3303 print_rtl (combine_dump_file, insns);
3304 fflush (combine_dump_file);
3307 /* Print function header into sched dump now
3308 because doing the sched analysis makes some of the dump. */
3313 fprintf (sched_dump_file, "\n;; Function %s\n\n",
3314 (*decl_printable_name) (decl, 2));
3317 if (optimize > 0 && flag_schedule_insns)
3319 /* Do control and data sched analysis,
3320 and write some of the results to dump file. */
3322 TIMEVAR (sched_time, schedule_insns (sched_dump_file));
3325 /* Dump rtl after instruction scheduling. */
3330 print_rtl (sched_dump_file, insns);
3331 fflush (sched_dump_file);
3334 /* Unless we did stupid register allocation,
3335 allocate pseudo-regs that are used only within 1 basic block. */
3338 TIMEVAR (local_alloc_time,
3340 regclass (insns, max_reg_num ());
3344 /* Dump rtl code after allocating regs within basic blocks. */
3349 fprintf (local_reg_dump_file, "\n;; Function %s\n\n",
3350 (*decl_printable_name) (decl, 2));
3351 dump_flow_info (local_reg_dump_file);
3352 dump_local_alloc (local_reg_dump_file);
3353 print_rtl (local_reg_dump_file, insns);
3354 fflush (local_reg_dump_file);
3357 if (global_reg_dump)
3359 fprintf (global_reg_dump_file, "\n;; Function %s\n\n",
3360 (*decl_printable_name) (decl, 2)));
3362 /* Save the last label number used so far, so reorg can tell
3363 when it's safe to kill spill regs. */
3364 max_label_num_after_reload = max_label_num ();
3366 /* Unless we did stupid register allocation,
3367 allocate remaining pseudo-regs, then do the reload pass
3368 fixing up any insns that are invalid. */
3370 TIMEVAR (global_alloc_time,
3373 failure = global_alloc (global_reg_dump_file);
3375 failure = reload (insns, 0, global_reg_dump_file);
3378 if (global_reg_dump)
3381 dump_global_regs (global_reg_dump_file);
3382 print_rtl (global_reg_dump_file, insns);
3383 fflush (global_reg_dump_file);
3387 goto exit_rest_of_compilation;
3389 reload_completed = 1;
3391 /* Do a very simple CSE pass over just the hard registers. */
3393 reload_cse_regs (insns);
3395 /* On some machines, the prologue and epilogue code, or parts thereof,
3396 can be represented as RTL. Doing so lets us schedule insns between
3397 it and the rest of the code and also allows delayed branch
3398 scheduling to operate in the epilogue. */
3400 thread_prologue_and_epilogue_insns (insns);
3402 if (optimize > 0 && flag_schedule_insns_after_reload)
3407 fprintf (sched2_dump_file, "\n;; Function %s\n\n",
3408 (*decl_printable_name) (decl, 2));
3411 /* Do control and data sched analysis again,
3412 and write some more of the results to dump file. */
3414 TIMEVAR (sched2_time, schedule_insns (sched2_dump_file));
3416 /* Dump rtl after post-reorder instruction scheduling. */
3421 print_rtl (sched2_dump_file, insns);
3422 fflush (sched2_dump_file);
3426 #ifdef LEAF_REGISTERS
3428 if (optimize > 0 && only_leaf_regs_used () && leaf_function_p ())
3432 /* One more attempt to remove jumps to .+1
3433 left by dead-store-elimination.
3434 Also do cross-jumping this time
3435 and delete no-op move insns. */
3439 TIMEVAR (jump_time, jump_optimize (insns, 1, 1, 0));
3442 /* Dump rtl code after jump, if we are doing that. */
3447 fprintf (jump2_opt_dump_file, "\n;; Function %s\n\n",
3448 (*decl_printable_name) (decl, 2));
3449 print_rtl (jump2_opt_dump_file, insns);
3450 fflush (jump2_opt_dump_file);
3453 /* If a machine dependent reorganization is needed, call it. */
3454 #ifdef MACHINE_DEPENDENT_REORG
3455 MACHINE_DEPENDENT_REORG (insns);
3458 /* If a scheduling pass for delayed branches is to be done,
3459 call the scheduling code. */
3462 if (optimize > 0 && flag_delayed_branch)
3464 TIMEVAR (dbr_sched_time, dbr_schedule (insns, dbr_sched_dump_file));
3469 fprintf (dbr_sched_dump_file, "\n;; Function %s\n\n",
3470 (*decl_printable_name) (decl, 2));
3471 print_rtl (dbr_sched_dump_file, insns);
3472 fflush (dbr_sched_dump_file);
3478 /* Shorten branches. */
3479 TIMEVAR (shorten_branch_time,
3481 shorten_branches (get_insns ());
3485 TIMEVAR (stack_reg_time, reg_to_stack (insns, stack_reg_dump_file));
3490 fprintf (stack_reg_dump_file, "\n;; Function %s\n\n",
3491 (*decl_printable_name) (decl, 2));
3492 print_rtl (stack_reg_dump_file, insns);
3493 fflush (stack_reg_dump_file);
3498 /* Now turn the rtl into assembler code. */
3500 TIMEVAR (final_time,
3505 /* Get the function's name, as described by its RTL.
3506 This may be different from the DECL_NAME name used
3507 in the source file. */
3509 x = DECL_RTL (decl);
3510 if (GET_CODE (x) != MEM)
3513 if (GET_CODE (x) != SYMBOL_REF)
3515 fnname = XSTR (x, 0);
3517 assemble_start_function (decl, fnname);
3518 final_start_function (insns, asm_out_file, optimize);
3519 final (insns, asm_out_file, optimize, 0);
3520 final_end_function (insns, asm_out_file, optimize);
3521 assemble_end_function (decl, fnname);
3522 fflush (asm_out_file);
3524 /* Release all memory held by regsets now */
3525 regset_release_memory ();
3528 /* Write DBX symbols if requested */
3530 /* Note that for those inline functions where we don't initially
3531 know for certain that we will be generating an out-of-line copy,
3532 the first invocation of this routine (rest_of_compilation) will
3533 skip over this code by doing a `goto exit_rest_of_compilation;'.
3534 Later on, finish_compilation will call rest_of_compilation again
3535 for those inline functions that need to have out-of-line copies
3536 generated. During that call, we *will* be routed past here. */
3538 #ifdef DBX_DEBUGGING_INFO
3539 if (write_symbols == DBX_DEBUG)
3540 TIMEVAR (symout_time, dbxout_function (decl));
3543 #ifdef DWARF_DEBUGGING_INFO
3544 if (write_symbols == DWARF_DEBUG)
3545 TIMEVAR (symout_time, dwarfout_file_scope_decl (decl, 0));
3548 #ifdef DWARF2_DEBUGGING_INFO
3549 if (write_symbols == DWARF2_DEBUG)
3550 TIMEVAR (symout_time, dwarf2out_decl (decl));
3553 exit_rest_of_compilation:
3555 /* In case the function was not output,
3556 don't leave any temporary anonymous types
3557 queued up for sdb output. */
3558 #ifdef SDB_DEBUGGING_INFO
3559 if (write_symbols == SDB_DEBUG)
3560 sdbout_types (NULL_TREE);
3563 /* Put back the tree of subblocks and list of arguments
3564 from before we copied them.
3565 Code generation and the output of debugging info may have modified
3566 the copy, but the original is unchanged. */
3568 if (saved_block_tree != 0)
3570 DECL_INITIAL (decl) = saved_block_tree;
3571 DECL_ARGUMENTS (decl) = saved_arguments;
3572 DECL_ABSTRACT_ORIGIN (decl) = NULL_TREE;
3575 reload_completed = 0;
3577 /* Clear out the insn_length contents now that they are no longer valid. */
3578 init_insn_lengths ();
3580 /* Clear out the real_constant_chain before some of the rtx's
3581 it runs through become garbage. */
3583 clear_const_double_mem ();
3585 /* Cancel the effect of rtl_in_current_obstack. */
3587 resume_temporary_allocation ();
3589 /* Show no temporary slots allocated. */
3593 /* The parsing time is all the time spent in yyparse
3594 *except* what is spent in this function. */
3596 parse_time -= get_run_time () - start_time;
3599 /* Entry point of cc1/c++. Decode command args, then call compile_file.
3600 Exit code is 35 if can't open files, 34 if fatal error,
3601 33 if had nonfatal errors, else success. */
3604 main (argc, argv, envp)
3611 int flag_print_mem = 0;
3612 int version_flag = 0;
3615 /* save in case md file wants to emit args as a comment. */
3619 p = argv[0] + strlen (argv[0]);
3620 while (p != argv[0] && p[-1] != '/'
3621 #ifdef DIR_SEPARATOR
3622 && p[-1] != DIR_SEPARATOR
3629 /* Get rid of any avoidable limit on stack size. */
3633 /* Set the stack limit huge so that alloca does not fail. */
3634 getrlimit (RLIMIT_STACK, &rlim);
3635 rlim.rlim_cur = rlim.rlim_max;
3636 setrlimit (RLIMIT_STACK, &rlim);
3638 #endif /* RLIMIT_STACK */
3640 signal (SIGFPE, float_signal);
3643 signal (SIGPIPE, pipe_closed);
3646 decl_printable_name = decl_name;
3647 lang_expand_expr = (struct rtx_def *(*)()) do_abort;
3649 /* Initialize whether `char' is signed. */
3650 flag_signed_char = DEFAULT_SIGNED_CHAR;
3651 #ifdef DEFAULT_SHORT_ENUMS
3652 /* Initialize how much space enums occupy, by default. */
3653 flag_short_enums = DEFAULT_SHORT_ENUMS;
3656 /* Scan to see what optimization level has been specified. That will
3657 determine the default value of many flags. */
3658 for (i = 1; i < argc; i++)
3660 if (!strcmp (argv[i], "-O"))
3664 else if (argv[i][0] == '-' && argv[i][1] == 'O')
3666 /* Handle -O2, -O3, -O69, ... */
3667 char *p = &argv[i][2];
3671 if (! (c >= '0' && c <= '9'))
3674 optimize = atoi (&argv[i][2]);
3678 obey_regdecls = (optimize == 0);
3683 flag_thread_jumps = 1;
3685 flag_delayed_branch = 1;
3687 #ifdef CAN_DEBUG_WITHOUT_FP
3688 flag_omit_frame_pointer = 1;
3690 flag_alias_check = 1;
3695 flag_cse_follow_jumps = 1;
3696 flag_cse_skip_blocks = 1;
3697 flag_expensive_optimizations = 1;
3698 flag_strength_reduce = 1;
3699 flag_rerun_cse_after_loop = 1;
3700 flag_caller_saves = 1;
3702 #ifdef INSN_SCHEDULING
3703 flag_schedule_insns = 1;
3704 flag_schedule_insns_after_reload = 1;
3710 flag_inline_functions = 1;
3713 /* Initialize target_flags before OPTIMIZATION_OPTIONS so the latter can
3716 set_target_switch ("");
3718 #ifdef OPTIMIZATION_OPTIONS
3719 /* Allow default optimizations to be specified on a per-machine basis. */
3720 OPTIMIZATION_OPTIONS (optimize);
3723 /* Initialize register usage now so switches may override. */
3726 for (i = 1; i < argc; i++)
3729 /* If this is a language-specific option,
3730 decode it in a language-specific way. */
3731 for (j = 0; lang_options[j] != 0; j++)
3732 if (!strncmp (argv[i], lang_options[j],
3733 strlen (lang_options[j])))
3735 if (lang_options[j] != 0)
3736 /* If the option is valid for *some* language,
3737 treat it as valid even if this language doesn't understand it. */
3738 lang_decode_option (argv[i]);
3739 else if (argv[i][0] == '-' && argv[i][1] != 0)
3741 register char *str = argv[i] + 1;
3746 set_target_switch (&str[1]);
3747 else if (!strcmp (str, "dumpbase"))
3749 dump_base_name = argv[++i];
3751 else if (str[0] == 'd')
3753 register char *p = &str[1];
3758 branch_prob_dump = 1;
3762 global_reg_dump = 1;
3768 cse_dump = 1, cse2_dump = 1;
3774 branch_prob_dump = 1;
3789 global_reg_dump = 1;
3807 flag_print_asm_name = 1;
3828 rtl_dump_and_exit = 1;
3835 else if (str[0] == 'f')
3837 register char *p = &str[1];
3840 /* Some kind of -f option.
3841 P's value is the option sans `-f'.
3842 Search for it in the table of options. */
3845 !found && j < sizeof (f_options) / sizeof (f_options[0]);
3848 if (!strcmp (p, f_options[j].string))
3850 *f_options[j].variable = f_options[j].on_value;
3851 /* A goto here would be cleaner,
3852 but breaks the vax pcc. */
3855 if (p[0] == 'n' && p[1] == 'o' && p[2] == '-'
3856 && ! strcmp (p+3, f_options[j].string))
3858 *f_options[j].variable = ! f_options[j].on_value;
3865 else if (!strncmp (p, "fixed-", 6))
3866 fix_register (&p[6], 1, 1);
3867 else if (!strncmp (p, "call-used-", 10))
3868 fix_register (&p[10], 0, 1);
3869 else if (!strncmp (p, "call-saved-", 11))
3870 fix_register (&p[11], 0, 0);
3872 error ("Invalid option `%s'", argv[i]);
3874 else if (str[0] == 'O')
3876 register char *p = str+1;
3877 while (*p && *p >= '0' && *p <= '9')
3882 error ("Invalid option `%s'", argv[i]);
3884 else if (!strcmp (str, "pedantic"))
3886 else if (!strcmp (str, "pedantic-errors"))
3887 flag_pedantic_errors = pedantic = 1;
3888 else if (!strcmp (str, "quiet"))
3890 else if (!strcmp (str, "version"))
3892 else if (!strcmp (str, "w"))
3893 inhibit_warnings = 1;
3894 else if (!strcmp (str, "W"))
3897 /* We save the value of warn_uninitialized, since if they put
3898 -Wuninitialized on the command line, we need to generate a
3899 warning about not using it without also specifying -O. */
3900 if (warn_uninitialized != 1)
3901 warn_uninitialized = 2;
3903 else if (str[0] == 'W')
3905 register char *p = &str[1];
3908 /* Some kind of -W option.
3909 P's value is the option sans `-W'.
3910 Search for it in the table of options. */
3913 !found && j < sizeof (W_options) / sizeof (W_options[0]);
3916 if (!strcmp (p, W_options[j].string))
3918 *W_options[j].variable = W_options[j].on_value;
3919 /* A goto here would be cleaner,
3920 but breaks the vax pcc. */
3923 if (p[0] == 'n' && p[1] == 'o' && p[2] == '-'
3924 && ! strcmp (p+3, W_options[j].string))
3926 *W_options[j].variable = ! W_options[j].on_value;
3933 else if (!strncmp (p, "id-clash-", 9))
3939 if (*endp >= '0' && *endp <= '9')
3943 error ("Invalid option `%s'", argv[i]);
3948 id_clash_len = atoi (str + 10);
3951 else if (!strncmp (p, "larger-than-", 12))
3953 char *endp = p + 12;
3957 if (*endp >= '0' && *endp <= '9')
3961 error ("Invalid option `%s'", argv[i]);
3962 goto larger_than_lose;
3965 warn_larger_than = 1;
3966 larger_than_size = atoi (str + 13);
3970 error ("Invalid option `%s'", argv[i]);
3972 else if (!strcmp (str, "p"))
3976 else if (!strcmp (str, "a"))
3978 #if !defined (BLOCK_PROFILER) || !defined (FUNCTION_BLOCK_PROFILER)
3979 warning ("`-a' option (basic block profile) not supported");
3981 profile_block_flag = (profile_block_flag < 2) ? 1 : 3;
3984 else if (!strcmp (str, "ax"))
3986 #if !defined (FUNCTION_BLOCK_PROFILER_EXIT) || !defined (BLOCK_PROFILER) || !defined (FUNCTION_BLOCK_PROFILER)
3987 warning ("`-ax' option (jump profiling) not supported");
3989 profile_block_flag = (!profile_block_flag
3990 || profile_block_flag == 2) ? 2 : 3;
3993 else if (str[0] == 'g')
3997 /* A lot of code assumes write_symbols == NO_DEBUG if the
3998 debugging level is 0 (thus -gstabs1 -gstabs0 would lose track
3999 of what debugging type has been selected). This records the
4000 selected type. It is an error to specify more than one
4002 static enum debug_info_type selected_debug_type = NO_DEBUG;
4003 /* Non-zero if debugging format has been explicitly set.
4004 -g and -ggdb don't explicitly set the debugging format so
4005 -gdwarf -g3 is equivalent to -gdwarf3. */
4006 static int type_explicitly_set_p = 0;
4007 /* Table of supported debugging formats. */
4010 /* Since PREFERRED_DEBUGGING_TYPE isn't necessarily a
4011 constant expression, we use NO_DEBUG in its place. */
4012 enum debug_info_type debug_type;
4013 int use_extensions_p;
4014 } *da, debug_args[] = {
4015 { "g", NO_DEBUG, DEFAULT_GDB_EXTENSIONS },
4016 { "ggdb", NO_DEBUG, 1 },
4017 #ifdef DBX_DEBUGGING_INFO
4018 { "gstabs", DBX_DEBUG, 0 },
4019 { "gstabs+", DBX_DEBUG, 1 },
4021 #ifdef DWARF_DEBUGGING_INFO
4022 { "gdwarf", DWARF_DEBUG, 0 },
4023 { "gdwarf+", DWARF_DEBUG, 1 },
4025 #ifdef DWARF2_DEBUGGING_INFO
4026 { "gdwarf-2", DWARF2_DEBUG, 0 },
4028 #ifdef XCOFF_DEBUGGING_INFO
4029 { "gxcoff", XCOFF_DEBUG, 0 },
4030 { "gxcoff+", XCOFF_DEBUG, 1 },
4032 #ifdef SDB_DEBUGGING_INFO
4033 { "gcoff", SDB_DEBUG, 0 },
4037 /* Indexed by enum debug_info_type. */
4038 static char *debug_type_names[] = {
4039 "none", "stabs", "coff", "dwarf-1", "dwarf-2", "xcoff"
4042 /* Look up STR in the table. */
4043 for (da = debug_args; da->arg; da++)
4045 if (! strncmp (str, da->arg, strlen (da->arg)))
4047 enum debug_info_type type = da->debug_type;
4050 p = str + strlen (da->arg);
4051 if (*p && (*p < '0' || *p > '9'))
4054 while (*q && (*q >= '0' && *q <= '9'))
4059 level = 2; /* default debugging info level */
4060 if (*q || level > 3)
4062 warning ("invalid debug level specification in option: `-%s'",
4064 /* ??? This error message is incorrect in the case of
4066 warning ("no debugging information will be generated");
4070 if (type == NO_DEBUG)
4072 type = PREFERRED_DEBUGGING_TYPE;
4073 if (len > 1 && strncmp (str, "ggdb", len) == 0)
4075 #ifdef DWARF2_DEBUGGING_INFO
4076 type = DWARF2_DEBUG;
4077 #elif defined DBX_DEBUGGING_INFO
4083 if (type == NO_DEBUG)
4084 warning ("`-%s' not supported by this configuration of GCC",
4087 /* Does it conflict with an already selected type? */
4088 if (type_explicitly_set_p
4089 /* -g/-ggdb don't conflict with anything */
4090 && da->debug_type != NO_DEBUG
4091 && type != selected_debug_type)
4092 warning ("`-%s' ignored, conflicts with `-g%s'",
4093 str, debug_type_names[(int) selected_debug_type]);
4096 /* If the format has already been set, -g/-ggdb
4097 only change the debug level. */
4098 if (type_explicitly_set_p
4099 && da->debug_type == NO_DEBUG)
4100 ; /* don't change debugging type */
4103 selected_debug_type = type;
4104 type_explicitly_set_p = da->debug_type != NO_DEBUG;
4106 write_symbols = (level == 0
4108 : selected_debug_type);
4109 use_gnu_debug_info_extensions = da->use_extensions_p;
4110 debug_info_level = (enum debug_info_level) level;
4116 warning ("`-%s' not supported by this configuration of GCC",
4119 else if (!strcmp (str, "o"))
4121 asm_file_name = argv[++i];
4123 else if (str[0] == 'G')
4125 g_switch_set = TRUE;
4126 g_switch_value = atoi ((str[1] != '\0') ? str+1 : argv[++i]);
4128 else if (!strncmp (str, "aux-info", 8))
4130 flag_gen_aux_info = 1;
4131 aux_info_file_name = (str[8] != '\0' ? str+8 : argv[++i]);
4134 error ("Invalid option `%s'", argv[i]);
4136 else if (argv[i][0] == '+')
4137 error ("Invalid option `%s'", argv[i]);
4142 /* Checker uses the frame pointer. */
4143 if (flag_check_memory_usage)
4144 flag_omit_frame_pointer = 0;
4146 /* Initialize for bytecode output. A good idea to do this as soon as
4147 possible after the "-f" options have been parsed. */
4148 if (output_bytecode)
4150 #ifndef TARGET_SUPPORTS_BYTECODE
4151 /* Just die with a fatal error if not supported */
4152 fatal ("-fbytecode not supported for this target");
4160 /* Inlining does not work if not optimizing,
4161 so force it not to be done. */
4165 /* The c_decode_option and lang_decode_option functions set
4166 this to `2' if -Wall is used, so we can avoid giving out
4167 lots of errors for people who don't realize what -Wall does. */
4168 if (warn_uninitialized == 1)
4169 warning ("-Wuninitialized is not supported without -O");
4172 #ifdef OVERRIDE_OPTIONS
4173 /* Some machines may reject certain combinations of options. */
4177 if (profile_block_flag == 3)
4179 warning ("`-ax' and `-a' are conflicting options. `-a' ignored.");
4180 profile_block_flag = 2;
4183 /* Unrolling all loops implies that standard loop unrolling must also
4185 if (flag_unroll_all_loops)
4186 flag_unroll_loops = 1;
4187 /* Loop unrolling requires that strength_reduction be on also. Silently
4188 turn on strength reduction here if it isn't already on. Also, the loop
4189 unrolling code assumes that cse will be run after loop, so that must
4190 be turned on also. */
4191 if (flag_unroll_loops)
4193 flag_strength_reduce = 1;
4194 flag_rerun_cse_after_loop = 1;
4197 /* Warn about options that are not supported on this machine. */
4198 #ifndef INSN_SCHEDULING
4199 if (flag_schedule_insns || flag_schedule_insns_after_reload)
4200 warning ("instruction scheduling not supported on this target machine");
4203 if (flag_delayed_branch)
4204 warning ("this target machine does not have delayed branches");
4207 /* If we are in verbose mode, write out the version and maybe all the
4208 option flags in use. */
4211 print_version (stderr, "");
4213 print_switch_values (stderr, 0, MAX_LINE, "", " ", "\n");
4216 compile_file (filename);
4218 #if !defined(OS2) && !defined(VMS) && (!defined(_WIN32) || defined (__CYGWIN32__))
4221 char *lim = (char *) sbrk (0);
4223 fprintf (stderr, "Data size %d.\n",
4224 lim - (char *) &environ);
4228 system ("ps -l 1>&2");
4231 #endif /* not USG */
4233 #endif /* ! OS2 && ! VMS && (! _WIN32 || CYGWIN32) */
4236 exit (FATAL_EXIT_CODE);
4238 exit (FATAL_EXIT_CODE);
4239 exit (SUCCESS_EXIT_CODE);
4243 /* Decode -m switches. */
4245 /* Here is a table, controlled by the tm.h file, listing each -m switch
4246 and which bits in `target_switches' it should set or clear.
4247 If VALUE is positive, it is bits to set.
4248 If VALUE is negative, -VALUE is bits to clear.
4249 (The sign bit is not used so there is no confusion.) */
4251 struct {char *name; int value;} target_switches []
4254 /* This table is similar, but allows the switch to have a value. */
4256 #ifdef TARGET_OPTIONS
4257 struct {char *prefix; char ** variable;} target_options []
4261 /* Decode the switch -mNAME. */
4264 set_target_switch (name)
4270 for (j = 0; j < sizeof target_switches / sizeof target_switches[0]; j++)
4271 if (!strcmp (target_switches[j].name, name))
4273 if (target_switches[j].value < 0)
4274 target_flags &= ~-target_switches[j].value;
4276 target_flags |= target_switches[j].value;
4280 #ifdef TARGET_OPTIONS
4282 for (j = 0; j < sizeof target_options / sizeof target_options[0]; j++)
4284 int len = strlen (target_options[j].prefix);
4285 if (!strncmp (target_options[j].prefix, name, len))
4287 *target_options[j].variable = name + len;
4294 error ("Invalid option `%s'", name);
4297 /* Print version information to FILE.
4298 Each line begins with INDENT (for the case where FILE is the
4299 assembler output file). */
4302 print_version (file, indent)
4306 fprintf (file, "%s%s%s version %s", indent, *indent != 0 ? " " : "",
4307 language_string, version_string);
4308 fprintf (file, " (%s)", TARGET_NAME);
4311 #define __VERSION__ "[unknown]"
4313 fprintf (file, " compiled by GNU C version %s.\n", __VERSION__);
4315 fprintf (file, " compiled by CC.\n");
4319 /* Print an option value and return the adjusted position in the line.
4320 ??? We don't handle error returns from fprintf (disk full); presumably
4321 other code will catch a disk full though. */
4324 print_single_switch (file, pos, max, indent, sep, term, type, name)
4327 char *indent, *sep, *term, *type, *name;
4329 /* The ultrix fprintf returns 0 on success, so compute the result we want
4330 here since we need it for the following test. */
4331 int len = strlen (sep) + strlen (type) + strlen (name);
4336 fprintf (file, "%s", term);
4341 fprintf (file, "%s", indent);
4342 pos = strlen (indent);
4344 fprintf (file, "%s%s%s", sep, type, name);
4349 /* Print active target switches to FILE.
4350 POS is the current cursor position and MAX is the size of a "line".
4351 Each line begins with INDENT and ends with TERM.
4352 Each switch is separated from the next by SEP. */
4355 print_switch_values (file, pos, max, indent, sep, term)
4358 char *indent, *sep, *term;
4363 /* Print the options as passed. */
4365 pos = print_single_switch (file, pos, max, indent, *indent ? " " : "", term,
4366 "options passed: ", "");
4368 for (p = &save_argv[1]; *p != NULL; p++)
4372 if (strcmp (*p, "-o") == 0)
4378 if (strcmp (*p, "-quiet") == 0)
4380 if (strcmp (*p, "-version") == 0)
4385 pos = print_single_switch (file, pos, max, indent, sep, term, *p, "");
4388 fprintf (file, "%s", term);
4390 /* Print the -f and -m options that have been enabled.
4391 We don't handle language specific options but printing argv
4394 pos = print_single_switch (file, 0, max, indent, *indent ? " " : "", term,
4395 "options enabled: ", "");
4397 for (j = 0; j < sizeof f_options / sizeof f_options[0]; j++)
4398 if (*f_options[j].variable == f_options[j].on_value)
4399 pos = print_single_switch (file, pos, max, indent, sep, term,
4400 "-f", f_options[j].string);
4402 /* Print target specific options. */
4404 flags = target_flags;
4405 for (j = 0; j < sizeof target_switches / sizeof target_switches[0]; j++)
4406 if (target_switches[j].name[0] != '\0'
4407 && target_switches[j].value > 0
4408 && ((target_switches[j].value & target_flags)
4409 == target_switches[j].value))
4411 pos = print_single_switch (file, pos, max, indent, sep, term,
4412 "-m", target_switches[j].name);
4413 flags &= ~ target_switches[j].value;
4416 #ifdef TARGET_OPTIONS
4417 for (j = 0; j < sizeof target_options / sizeof target_options[0]; j++)
4418 if (*target_options[j].variable != NULL)
4421 sprintf (prefix, "-m%s", target_options[j].prefix);
4422 pos = print_single_switch (file, pos, max, indent, sep, term,
4423 prefix, *target_options[j].variable);
4427 fprintf (file, "%s", term);
4430 /* Record the beginning of a new source file, named FILENAME. */
4433 debug_start_source_file (filename)
4434 register char *filename;
4436 #ifdef DBX_DEBUGGING_INFO
4437 if (write_symbols == DBX_DEBUG)
4438 dbxout_start_new_source_file (filename);
4440 #ifdef DWARF_DEBUGGING_INFO
4441 if (debug_info_level == DINFO_LEVEL_VERBOSE
4442 && write_symbols == DWARF_DEBUG)
4443 dwarfout_start_new_source_file (filename);
4444 #endif /* DWARF_DEBUGGING_INFO */
4445 #ifdef DWARF2_DEBUGGING_INFO
4446 if (debug_info_level == DINFO_LEVEL_VERBOSE
4447 && write_symbols == DWARF2_DEBUG)
4448 dwarf2out_start_source_file (filename);
4449 #endif /* DWARF2_DEBUGGING_INFO */
4450 #ifdef SDB_DEBUGGING_INFO
4451 if (write_symbols == SDB_DEBUG)
4452 sdbout_start_new_source_file (filename);
4456 /* Record the resumption of a source file. LINENO is the line number in
4457 the source file we are returning to. */
4460 debug_end_source_file (lineno)
4461 register unsigned lineno;
4463 #ifdef DBX_DEBUGGING_INFO
4464 if (write_symbols == DBX_DEBUG)
4465 dbxout_resume_previous_source_file ();
4467 #ifdef DWARF_DEBUGGING_INFO
4468 if (debug_info_level == DINFO_LEVEL_VERBOSE
4469 && write_symbols == DWARF_DEBUG)
4470 dwarfout_resume_previous_source_file (lineno);
4471 #endif /* DWARF_DEBUGGING_INFO */
4472 #ifdef DWARF2_DEBUGGING_INFO
4473 if (debug_info_level == DINFO_LEVEL_VERBOSE
4474 && write_symbols == DWARF2_DEBUG)
4475 dwarf2out_end_source_file ();
4476 #endif /* DWARF2_DEBUGGING_INFO */
4477 #ifdef SDB_DEBUGGING_INFO
4478 if (write_symbols == SDB_DEBUG)
4479 sdbout_resume_previous_source_file ();
4483 /* Called from check_newline in c-parse.y. The `buffer' parameter contains
4484 the tail part of the directive line, i.e. the part which is past the
4485 initial whitespace, #, whitespace, directive-name, whitespace part. */
4488 debug_define (lineno, buffer)
4489 register unsigned lineno;
4490 register char *buffer;
4492 #ifdef DWARF_DEBUGGING_INFO
4493 if (debug_info_level == DINFO_LEVEL_VERBOSE
4494 && write_symbols == DWARF_DEBUG)
4495 dwarfout_define (lineno, buffer);
4496 #endif /* DWARF_DEBUGGING_INFO */
4497 #ifdef DWARF2_DEBUGGING_INFO
4498 if (debug_info_level == DINFO_LEVEL_VERBOSE
4499 && write_symbols == DWARF2_DEBUG)
4500 dwarf2out_define (lineno, buffer);
4501 #endif /* DWARF2_DEBUGGING_INFO */
4504 /* Called from check_newline in c-parse.y. The `buffer' parameter contains
4505 the tail part of the directive line, i.e. the part which is past the
4506 initial whitespace, #, whitespace, directive-name, whitespace part. */
4509 debug_undef (lineno, buffer)
4510 register unsigned lineno;
4511 register char *buffer;
4513 #ifdef DWARF_DEBUGGING_INFO
4514 if (debug_info_level == DINFO_LEVEL_VERBOSE
4515 && write_symbols == DWARF_DEBUG)
4516 dwarfout_undef (lineno, buffer);
4517 #endif /* DWARF_DEBUGGING_INFO */
4518 #ifdef DWARF2_DEBUGGING_INFO
4519 if (debug_info_level == DINFO_LEVEL_VERBOSE
4520 && write_symbols == DWARF2_DEBUG)
4521 dwarf2out_undef (lineno, buffer);
4522 #endif /* DWARF2_DEBUGGING_INFO */