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>
39 #ifdef HAVE_SYS_PARAM_H
40 #include <sys/param.h>
43 #undef FLOAT /* This is for hpux. They should change hpux. */
44 #undef FFS /* Some systems define this in param.h. */
46 #ifdef TIME_WITH_SYS_TIME
47 # include <sys/time.h>
51 # include <sys/time.h>
57 #ifdef HAVE_SYS_RESOURCE_H
58 # include <sys/resource.h>
61 #ifdef HAVE_SYS_TIMES_H
62 # include <sys/times.h>
69 #include "insn-attr.h"
76 #ifdef XCOFF_DEBUGGING_INFO
81 /* The extra parameters substantially improve the I/O performance. */
83 vms_fopen (fname, type)
87 /* The <stdio.h> in the gcc-vms-1.42 distribution prototypes fopen with two
88 fixed arguments, which matches ANSI's specification but not VAXCRTL's
89 pre-ANSI implementation. This hack circumvents the mismatch problem. */
90 FILE *(*vmslib_fopen)() = (FILE *(*)()) fopen;
93 return (*vmslib_fopen) (fname, type, "mbc=32",
94 "deq=64", "fop=tef", "shr=nil");
96 return (*vmslib_fopen) (fname, type, "mbc=32");
98 #define fopen vms_fopen
101 #ifndef DEFAULT_GDB_EXTENSIONS
102 #define DEFAULT_GDB_EXTENSIONS 1
105 /* If more than one debugging type is supported, you must define
106 PREFERRED_DEBUGGING_TYPE to choose a format in a system-dependent way.
108 This is one long line cause VAXC can't handle a \-newline. */
109 #if 1 < (defined (DBX_DEBUGGING_INFO) + defined (SDB_DEBUGGING_INFO) + defined (DWARF_DEBUGGING_INFO) + defined (DWARF2_DEBUGGING_INFO) + defined (XCOFF_DEBUGGING_INFO))
110 #ifndef PREFERRED_DEBUGGING_TYPE
111 You Lose! You must define PREFERRED_DEBUGGING_TYPE!
112 #endif /* no PREFERRED_DEBUGGING_TYPE */
113 #else /* Only one debugging format supported. Define PREFERRED_DEBUGGING_TYPE
114 so the following code needn't care. */
115 #ifdef DBX_DEBUGGING_INFO
116 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
118 #ifdef SDB_DEBUGGING_INFO
119 #define PREFERRED_DEBUGGING_TYPE SDB_DEBUG
121 #ifdef DWARF_DEBUGGING_INFO
122 #define PREFERRED_DEBUGGING_TYPE DWARF_DEBUG
124 #ifdef DWARF2_DEBUGGING_INFO
125 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
127 #ifdef XCOFF_DEBUGGING_INFO
128 #define PREFERRED_DEBUGGING_TYPE XCOFF_DEBUG
130 #endif /* More than one debugger format enabled. */
132 /* If still not defined, must have been because no debugging formats
134 #ifndef PREFERRED_DEBUGGING_TYPE
135 #define PREFERRED_DEBUGGING_TYPE NO_DEBUG
138 extern int rtx_equal_function_value_matters;
140 #if ! (defined (VMS) || defined (OS2))
141 extern char **environ;
143 extern char *version_string, *language_string;
145 /* Carry information from ASM_DECLARE_OBJECT_NAME
146 to ASM_FINISH_DECLARE_OBJECT. */
148 extern int size_directive_output;
149 extern tree last_assemble_variable_decl;
151 extern void init_lex ();
152 extern void init_decl_processing ();
153 extern void init_obstacks ();
154 extern void init_tree_codes ();
155 extern void init_rtl ();
156 extern void init_regs ();
157 extern void init_optabs ();
158 extern void init_stmt ();
159 extern void init_reg_sets ();
160 extern void dump_flow_info ();
161 extern void dump_sched_info ();
162 extern void dump_local_alloc ();
163 extern void regset_release_memory ();
165 void rest_of_decl_compilation ();
166 void error_with_file_and_line PVPROTO((char *file, int line, char *s, ...));
167 void error_with_decl PVPROTO((tree decl, char *s, ...));
168 void error_for_asm PVPROTO((rtx insn, char *s, ...));
169 void error PVPROTO((char *s, ...));
170 void fatal PVPROTO((char *s, ...));
171 void warning_with_file_and_line PVPROTO((char *file, int line, char *s, ...));
172 void warning_with_decl PVPROTO((tree decl, char *s, ...));
173 void warning_for_asm PVPROTO((rtx insn, char *s, ...));
174 void warning PVPROTO((char *s, ...));
175 void pedwarn PVPROTO((char *s, ...));
176 void pedwarn_with_decl PVPROTO((tree decl, char *s, ...));
177 void pedwarn_with_file_and_line PVPROTO((char *file, int line, char *s, ...));
178 void sorry PVPROTO((char *s, ...));
179 void really_sorry PVPROTO((char *s, ...));
184 void set_target_switch ();
185 static char *decl_name ();
187 void print_version ();
188 int print_single_switch ();
189 void print_switch_values ();
190 /* Length of line when printing switch values. */
194 extern char *sbrk ();
197 /* Name of program invoked, sans directories. */
201 /* Copy of arguments to main. */
205 /* Name of current original source file (what was input to cpp).
206 This comes from each #-command in the actual input. */
208 char *input_filename;
210 /* Name of top-level original source file (what was input to cpp).
211 This comes from the #-command at the beginning of the actual input.
212 If there isn't any there, then this is the cc1 input file name. */
214 char *main_input_filename;
217 /* Stream for reading from the input file. */
221 /* Current line number in real source file. */
225 /* Stack of currently pending input files. */
227 struct file_stack *input_file_stack;
229 /* Incremented on each change to input_file_stack. */
230 int input_file_stack_tick;
232 /* FUNCTION_DECL for function now being parsed or compiled. */
234 extern tree current_function_decl;
236 /* Name to use as base of names for dump output files. */
238 char *dump_base_name;
240 /* Bit flags that specify the machine subtype we are compiling for.
241 Bits are tested using macros TARGET_... defined in the tm.h file
242 and set by `-m...' switches. Must be defined in rtlanal.c. */
244 extern int target_flags;
246 /* Flags saying which kinds of debugging dump have been requested. */
249 int rtl_dump_and_exit = 0;
250 int jump_opt_dump = 0;
251 int addressof_dump = 0;
255 int branch_prob_dump = 0;
257 int combine_dump = 0;
258 int regmove_dump = 0;
260 int local_reg_dump = 0;
261 int global_reg_dump = 0;
263 int jump2_opt_dump = 0;
264 int dbr_sched_dump = 0;
265 int flag_print_asm_name = 0;
266 int stack_reg_dump = 0;
268 /* Name for output file of assembly code, specified with -o. */
272 /* Value of the -G xx switch, and whether it was passed or not. */
276 /* Type(s) of debugging information we are producing (if any).
277 See flags.h for the definitions of the different possible
278 types of debugging information. */
279 enum debug_info_type write_symbols = NO_DEBUG;
281 /* Level of debugging information we are producing. See flags.h
282 for the definitions of the different possible levels. */
283 enum debug_info_level debug_info_level = DINFO_LEVEL_NONE;
285 /* Nonzero means use GNU-only extensions in the generated symbolic
286 debugging information. */
287 /* Currently, this only has an effect when write_symbols is set to
288 DBX_DEBUG, XCOFF_DEBUG, or DWARF_DEBUG. */
289 int use_gnu_debug_info_extensions = 0;
291 /* Nonzero means do optimizations. -O.
292 Particular numeric values stand for particular amounts of optimization;
293 thus, -O2 stores 2 here. However, the optimizations beyond the basic
294 ones are not controlled directly by this variable. Instead, they are
295 controlled by individual `flag_...' variables that are defaulted
296 based on this variable. */
300 /* Number of error messages and warning messages so far. */
303 int warningcount = 0;
306 /* Flag to output bytecode instead of native assembler */
307 int output_bytecode = 0;
309 /* Pointer to function to compute the name to use to print a declaration.
310 DECL is the declaration in question.
311 VERBOSITY determines what information will be printed:
312 0: DECL_NAME, demangled as necessary.
313 1: and scope information.
314 2: and any other information that might be interesting, such as function
315 parameter types in C++. */
317 char *(*decl_printable_name) (/* tree decl, int verbosity */);
319 /* Pointer to function to compute rtl for a language-specific tree code. */
321 struct rtx_def *(*lang_expand_expr) ();
323 /* Pointer to function to finish handling an incomplete decl at the
324 end of compilation. */
326 void (*incomplete_decl_finalize_hook) () = 0;
328 /* Highest label number used at the end of reload. */
330 int max_label_num_after_reload;
332 /* Nonzero if generating code to do profiling. */
334 int profile_flag = 0;
336 /* Nonzero if generating code to do profiling on a line-by-line basis. */
338 int profile_block_flag;
340 /* Nonzero if generating code to profile program flow graph arcs. */
342 int profile_arc_flag = 0;
344 /* Nonzero if generating info for gcov to calculate line test coverage. */
346 int flag_test_coverage = 0;
348 /* Nonzero indicates that branch taken probabilities should be calculated. */
350 int flag_branch_probabilities = 0;
352 /* Nonzero for -pedantic switch: warn about anything
353 that standard spec forbids. */
357 /* Temporarily suppress certain warnings.
358 This is set while reading code from a system header file. */
360 int in_system_header = 0;
362 /* Nonzero means do stupid register allocation.
363 Currently, this is 1 if `optimize' is 0. */
365 int obey_regdecls = 0;
367 /* Don't print functions as they are compiled and don't print
368 times taken by the various passes. -quiet. */
374 /* Nonzero means `char' should be signed. */
376 int flag_signed_char;
378 /* Nonzero means give an enum type only as many bytes as it needs. */
380 int flag_short_enums;
382 /* Nonzero for -fcaller-saves: allocate values in regs that need to
383 be saved across function calls, if that produces overall better code.
384 Optional now, so people can test it. */
386 #ifdef DEFAULT_CALLER_SAVES
387 int flag_caller_saves = 1;
389 int flag_caller_saves = 0;
392 /* Nonzero if structures and unions should be returned in memory.
394 This should only be defined if compatibility with another compiler or
395 with an ABI is needed, because it results in slower code. */
397 #ifndef DEFAULT_PCC_STRUCT_RETURN
398 #define DEFAULT_PCC_STRUCT_RETURN 1
401 /* Nonzero for -fpcc-struct-return: return values the same way PCC does. */
403 int flag_pcc_struct_return = DEFAULT_PCC_STRUCT_RETURN;
405 /* Nonzero for -fforce-mem: load memory value into a register
406 before arithmetic on it. This makes better cse but slower compilation. */
408 int flag_force_mem = 0;
410 /* Nonzero for -fforce-addr: load memory address into a register before
411 reference to memory. This makes better cse but slower compilation. */
413 int flag_force_addr = 0;
415 /* Nonzero for -fdefer-pop: don't pop args after each function call;
416 instead save them up to pop many calls' args with one insns. */
418 int flag_defer_pop = 0;
420 /* Nonzero for -ffloat-store: don't allocate floats and doubles
421 in extended-precision registers. */
423 int flag_float_store = 0;
425 /* Nonzero for -fcse-follow-jumps:
426 have cse follow jumps to do a more extensive job. */
428 int flag_cse_follow_jumps;
430 /* Nonzero for -fcse-skip-blocks:
431 have cse follow a branch around a block. */
432 int flag_cse_skip_blocks;
434 /* Nonzero for -fexpensive-optimizations:
435 perform miscellaneous relatively-expensive optimizations. */
436 int flag_expensive_optimizations;
438 /* Nonzero for -fthread-jumps:
439 have jump optimize output of loop. */
441 int flag_thread_jumps;
443 /* Nonzero enables strength-reduction in loop.c. */
445 int flag_strength_reduce = 0;
447 /* Nonzero enables loop unrolling in unroll.c. Only loops for which the
448 number of iterations can be calculated at compile-time (UNROLL_COMPLETELY,
449 UNROLL_MODULO) or at run-time (preconditioned to be UNROLL_MODULO) are
452 int flag_unroll_loops;
454 /* Nonzero enables loop unrolling in unroll.c. All loops are unrolled.
455 This is generally not a win. */
457 int flag_unroll_all_loops;
459 /* Nonzero forces all invariant computations in loops to be moved
462 int flag_move_all_movables = 0;
464 /* Nonzero forces all general induction variables in loops to be
467 int flag_reduce_all_givs = 0;
469 /* Nonzero for -fwritable-strings:
470 store string constants in data segment and don't uniquize them. */
472 int flag_writable_strings = 0;
474 /* Nonzero means don't put addresses of constant functions in registers.
475 Used for compiling the Unix kernel, where strange substitutions are
476 done on the assembly output. */
478 int flag_no_function_cse = 0;
480 /* Nonzero for -fomit-frame-pointer:
481 don't make a frame pointer in simple functions that don't require one. */
483 int flag_omit_frame_pointer = 0;
485 /* Nonzero means place each function into its own section on those platforms
486 which support arbitrary section names and unlimited numbers of sections. */
488 int flag_function_sections = 0;
490 /* Nonzero to inhibit use of define_optimization peephole opts. */
492 int flag_no_peephole = 0;
494 /* Nonzero allows GCC to violate some IEEE or ANSI rules regarding math
495 operations in the interest of optimization. For example it allows
496 GCC to assume arguments to sqrt are nonnegative numbers, allowing
497 faster code for sqrt to be generated. */
499 int flag_fast_math = 0;
501 /* Nonzero means all references through pointers are volatile. */
505 /* Nonzero means treat all global and extern variables as global. */
507 int flag_volatile_global;
509 /* Nonzero means just do syntax checking; don't output anything. */
511 int flag_syntax_only = 0;
513 /* Nonzero means to rerun cse after loop optimization. This increases
514 compilation time about 20% and picks up a few more common expressions. */
516 static int flag_rerun_cse_after_loop;
518 /* Nonzero means to run loop optimizations twice. */
520 int flag_rerun_loop_opt;
522 /* Nonzero for -finline-functions: ok to inline functions that look like
523 good inline candidates. */
525 int flag_inline_functions;
527 /* Nonzero for -fkeep-inline-functions: even if we make a function
528 go inline everywhere, keep its definition around for debugging
531 int flag_keep_inline_functions;
533 /* Nonzero means that functions will not be inlined. */
537 /* Nonzero means that we should emit static const variables
538 regardless of whether or not optimization is turned on. */
540 int flag_keep_static_consts = 1;
542 /* Nonzero means we should be saving declaration info into a .X file. */
544 int flag_gen_aux_info = 0;
546 /* Specified name of aux-info file. */
548 static char *aux_info_file_name;
550 /* Nonzero means make the text shared if supported. */
552 int flag_shared_data;
554 /* Nonzero means schedule into delayed branch slots if supported. */
556 int flag_delayed_branch;
558 /* Nonzero if we are compiling pure (sharable) code.
559 Value is 1 if we are doing reasonable (i.e. simple
560 offset into offset table) pic. Value is 2 if we can
561 only perform register offsets. */
565 /* Nonzero means generate extra code for exception handling and enable
566 exception handling. */
568 int flag_exceptions = 2;
570 /* Nonzero means don't place uninitialized global data in common storage
575 /* Nonzero means pretend it is OK to examine bits of target floats,
576 even if that isn't true. The resulting code will have incorrect constants,
577 but the same series of instructions that the native compiler would make. */
579 int flag_pretend_float;
581 /* Nonzero means change certain warnings into errors.
582 Usually these are warnings about failure to conform to some standard. */
584 int flag_pedantic_errors = 0;
586 /* flag_schedule_insns means schedule insns within basic blocks (before
588 flag_schedule_insns_after_reload means schedule insns after
591 int flag_schedule_insns = 0;
592 int flag_schedule_insns_after_reload = 0;
595 /* The following flags have effect only for scheduling before register
598 flag_schedule_interblock means schedule insns accross basic blocks.
599 flag_schedule_speculative means allow speculative motion of non-load insns.
600 flag_schedule_speculative_load means allow speculative motion of some
602 flag_schedule_speculative_load_dangerous allows speculative motion of more
604 flag_schedule_reverse_before_reload means try to reverse original order
606 flag_schedule_reverse_after_reload means try to reverse original order
609 int flag_schedule_interblock = 1;
610 int flag_schedule_speculative = 1;
611 int flag_schedule_speculative_load = 0;
612 int flag_schedule_speculative_load_dangerous = 0;
613 int flag_schedule_reverse_before_reload = 0;
614 int flag_schedule_reverse_after_reload = 0;
617 /* flag_on_branch_count_reg means try to replace add-1,compare,branch tupple
618 by a cheaper branch, on a count register. */
619 int flag_branch_on_count_reg;
623 /* -finhibit-size-directive inhibits output of .size for ELF.
624 This is used only for compiling crtstuff.c,
625 and it may be extended to other effects
626 needed for crtstuff.c on other systems. */
627 int flag_inhibit_size_directive = 0;
629 /* -fverbose-asm causes extra commentary information to be produced in
630 the generated assembly code (to make it more readable). This option
631 is generally only of use to those who actually need to read the
632 generated assembly code (perhaps while debugging the compiler itself).
633 -fverbose-asm is the default. -fno-verbose-asm causes the extra information
634 to be omitted and is useful when comparing two assembler files. */
636 int flag_verbose_asm = 1;
638 /* -dA causes debug commentary information to be produced in
639 the generated assembly code (to make it more readable). This option
640 is generally only of use to those who actually need to read the
641 generated assembly code (perhaps while debugging the compiler itself).
642 Currently, this switch is only used by dwarfout.c; however, it is intended
643 to be a catchall for printing debug information in the assembler file. */
645 int flag_debug_asm = 0;
647 /* -fgnu-linker specifies use of the GNU linker for initializations.
648 (Or, more generally, a linker that handles initializations.)
649 -fno-gnu-linker says that collect2 will be used. */
651 int flag_gnu_linker = 0;
653 int flag_gnu_linker = 1;
656 /* Tag all structures with __attribute__(packed) */
657 int flag_pack_struct = 0;
659 /* Emit code to check for stack overflow; also may cause large objects
660 to be allocated dynamically. */
661 int flag_stack_check;
663 /* -fcheck-memory-usage causes extra code to be generated in order to check
664 memory accesses. This is used by a detector of bad memory accesses such
666 int flag_check_memory_usage = 0;
668 /* -fprefix-function-name causes function name to be prefixed. This
669 can be used with -fcheck-memory-usage to isolate code compiled with
670 -fcheck-memory-usage. */
671 int flag_prefix_function_name = 0;
673 int flag_regmove = 0;
675 /* 1 if alias checking is on (by default, when -O). */
676 int flag_alias_check = 0;
678 /* 0 if pointer arguments may alias each other. True in C.
679 1 if pointer arguments may not alias each other but may alias
681 2 if pointer arguments may not alias each other and may not
682 alias global variables. True in Fortran.
683 This defaults to 0 for C. */
684 int flag_argument_noalias = 0;
686 /* Table of language-independent -f options.
687 STRING is the option name. VARIABLE is the address of the variable.
688 ON_VALUE is the value to store in VARIABLE
689 if `-fSTRING' is seen as an option.
690 (If `-fno-STRING' is seen as an option, the opposite value is stored.) */
692 struct { char *string; int *variable; int on_value;} f_options[] =
694 {"float-store", &flag_float_store, 1},
695 {"volatile", &flag_volatile, 1},
696 {"volatile-global", &flag_volatile_global, 1},
697 {"defer-pop", &flag_defer_pop, 1},
698 {"omit-frame-pointer", &flag_omit_frame_pointer, 1},
699 {"cse-follow-jumps", &flag_cse_follow_jumps, 1},
700 {"cse-skip-blocks", &flag_cse_skip_blocks, 1},
701 {"expensive-optimizations", &flag_expensive_optimizations, 1},
702 {"thread-jumps", &flag_thread_jumps, 1},
703 {"strength-reduce", &flag_strength_reduce, 1},
704 {"unroll-loops", &flag_unroll_loops, 1},
705 {"unroll-all-loops", &flag_unroll_all_loops, 1},
706 {"move-all-movables", &flag_move_all_movables, 1},
707 {"reduce-all-givs", &flag_reduce_all_givs, 1},
708 {"writable-strings", &flag_writable_strings, 1},
709 {"peephole", &flag_no_peephole, 0},
710 {"force-mem", &flag_force_mem, 1},
711 {"force-addr", &flag_force_addr, 1},
712 {"function-cse", &flag_no_function_cse, 0},
713 {"inline-functions", &flag_inline_functions, 1},
714 {"keep-inline-functions", &flag_keep_inline_functions, 1},
715 {"inline", &flag_no_inline, 0},
716 {"keep-static-consts", &flag_keep_static_consts, 1},
717 {"syntax-only", &flag_syntax_only, 1},
718 {"shared-data", &flag_shared_data, 1},
719 {"caller-saves", &flag_caller_saves, 1},
720 {"pcc-struct-return", &flag_pcc_struct_return, 1},
721 {"reg-struct-return", &flag_pcc_struct_return, 0},
722 {"delayed-branch", &flag_delayed_branch, 1},
723 {"rerun-cse-after-loop", &flag_rerun_cse_after_loop, 1},
724 {"rerun-loop-opt", &flag_rerun_loop_opt, 1},
725 {"pretend-float", &flag_pretend_float, 1},
726 {"schedule-insns", &flag_schedule_insns, 1},
727 {"schedule-insns2", &flag_schedule_insns_after_reload, 1},
729 {"sched-interblock",&flag_schedule_interblock, 1},
730 {"sched-spec",&flag_schedule_speculative, 1},
731 {"sched-spec-load",&flag_schedule_speculative_load, 1},
732 {"sched-spec-load-dangerous",&flag_schedule_speculative_load_dangerous, 1},
733 {"sched-reverse-S",&flag_schedule_reverse_before_reload, 1},
734 {"sched-reverse-R",&flag_schedule_reverse_after_reload, 1},
735 {"branch-count-reg",&flag_branch_on_count_reg, 1},
737 {"pic", &flag_pic, 1},
738 {"PIC", &flag_pic, 2},
739 {"exceptions", &flag_exceptions, 1},
740 {"sjlj-exceptions", &exceptions_via_longjmp, 1},
741 {"asynchronous-exceptions", &asynchronous_exceptions, 1},
742 {"profile-arcs", &profile_arc_flag, 1},
743 {"test-coverage", &flag_test_coverage, 1},
744 {"branch-probabilities", &flag_branch_probabilities, 1},
745 {"fast-math", &flag_fast_math, 1},
746 {"common", &flag_no_common, 0},
747 {"inhibit-size-directive", &flag_inhibit_size_directive, 1},
748 {"function-sections", &flag_function_sections, 1},
749 {"verbose-asm", &flag_verbose_asm, 1},
750 {"gnu-linker", &flag_gnu_linker, 1},
751 {"regmove", &flag_regmove, 1},
752 {"pack-struct", &flag_pack_struct, 1},
753 {"stack-check", &flag_stack_check, 1},
754 {"bytecode", &output_bytecode, 1},
755 {"alias-check", &flag_alias_check, 1},
756 {"argument-alias", &flag_argument_noalias, 0},
757 {"argument-noalias", &flag_argument_noalias, 1},
758 {"argument-noalias-global", &flag_argument_noalias, 2},
759 {"check-memory-usage", &flag_check_memory_usage, 1},
760 {"prefix-function-name", &flag_prefix_function_name, 1}
763 /* Table of language-specific options. */
765 char *lang_options[] =
768 "-fallow-single-precision",
770 "-fsigned-bitfields",
771 "-funsigned-bitfields",
772 "-fno-signed-bitfields",
773 "-fno-unsigned-bitfields",
777 "-fno-unsigned-char",
793 "-fno-cond-mismatch",
794 "-fdollars-in-identifiers",
795 "-fno-dollars-in-identifiers",
804 "-Wbad-function-cast",
805 "-Wno-bad-function-cast",
809 "-Wno-char-subscripts",
820 "-Wimplicit-function-declaration",
821 "-Wno-implicit-function-declaration",
822 "-Werror-implicit-function-declaration",
830 "-Wno-missing-braces",
831 "-Wmissing-declarations",
832 "-Wno-missing-declarations",
833 "-Wmissing-prototypes",
834 "-Wno-missing-prototypes",
836 "-Wno-nested-externs",
840 "-Wno-pointer-arith",
842 "-Wno-redundant-decls",
845 "-Wstrict-prototypes",
846 "-Wno-strict-prototypes",
854 "-Wno-write-strings",
856 /* these are for obj c */
867 "-print-objc-runtime-info",
873 /* Options controlling warnings */
875 /* Don't print warning messages. -w. */
877 int inhibit_warnings = 0;
879 /* Print various extra warnings. -W. */
881 int extra_warnings = 0;
883 /* Treat warnings as errors. -Werror. */
885 int warnings_are_errors = 0;
887 /* Nonzero to warn about unused local variables. */
891 /* Nonzero to warn about variables used before they are initialized. */
893 int warn_uninitialized;
895 /* Nonzero means warn about all declarations which shadow others. */
899 /* Warn if a switch on an enum fails to have a case for every enum value. */
903 /* Nonzero means warn about function definitions that default the return type
904 or that use a null return and have a return-type other than void. */
906 int warn_return_type;
908 /* Nonzero means warn about pointer casts that increase the required
909 alignment of the target type (and might therefore lead to a crash
910 due to a misaligned access). */
914 /* Nonzero means warn about any identifiers that match in the first N
915 characters. The value N is in `id_clash_len'. */
918 unsigned id_clash_len;
920 /* Nonzero means warn about any objects definitions whose size is larger
921 than N bytes. Also want about function definitions whose returned
922 values are larger than N bytes. The value N is in `larger_than_size'. */
924 int warn_larger_than;
925 unsigned larger_than_size;
927 /* Nonzero means warn if inline function is too large. */
931 /* Warn if a function returns an aggregate,
932 since there are often incompatible calling conventions for doing this. */
934 int warn_aggregate_return;
936 /* Likewise for -W. */
938 struct { char *string; int *variable; int on_value;} W_options[] =
940 {"unused", &warn_unused, 1},
941 {"error", &warnings_are_errors, 1},
942 {"shadow", &warn_shadow, 1},
943 {"switch", &warn_switch, 1},
944 {"aggregate-return", &warn_aggregate_return, 1},
945 {"cast-align", &warn_cast_align, 1},
946 {"uninitialized", &warn_uninitialized, 1},
947 {"inline", &warn_inline, 1}
950 /* Output files for assembler code (real compiler output)
951 and debugging dumps. */
956 FILE *jump_opt_dump_file;
957 FILE *addressof_dump_file;
959 FILE *loop_dump_file;
960 FILE *cse2_dump_file;
961 FILE *branch_prob_dump_file;
962 FILE *flow_dump_file;
963 FILE *combine_dump_file;
964 FILE *regmove_dump_file;
965 FILE *sched_dump_file;
966 FILE *local_reg_dump_file;
967 FILE *global_reg_dump_file;
968 FILE *sched2_dump_file;
969 FILE *jump2_opt_dump_file;
970 FILE *dbr_sched_dump_file;
971 FILE *stack_reg_dump_file;
973 /* Time accumulators, to count the total time spent in various passes. */
977 int integration_time;
982 int branch_prob_time;
987 int local_alloc_time;
988 int global_alloc_time;
991 int shorten_branch_time;
997 /* Return time used so far, in microseconds. */
1002 #if !defined (_WIN32) || defined (__CYGWIN32__)
1007 struct rusage rusage;
1012 int proc_system_time;
1013 int child_user_time;
1014 int child_system_time;
1022 #if defined (_WIN32) && !defined (__CYGWIN32__)
1026 return (clock() * 1000);
1027 #else /* not _WIN32 */
1030 return (tms.tms_utime + tms.tms_stime) * (1000000 / HZ);
1033 getrusage (0, &rusage);
1034 return (rusage.ru_utime.tv_sec * 1000000 + rusage.ru_utime.tv_usec
1035 + rusage.ru_stime.tv_sec * 1000000 + rusage.ru_stime.tv_usec);
1038 return (vms_times.proc_user_time + vms_times.proc_system_time) * 10000;
1044 #define TIMEVAR(VAR, BODY) \
1045 do { int otime = get_run_time (); BODY; VAR += get_run_time () - otime; } while (0)
1048 print_time (str, total)
1053 "time in %s: %d.%06d\n",
1054 str, total / 1000000, total % 1000000);
1057 /* Count an error or warning. Return 1 if the message should be printed. */
1060 count_error (warningp)
1063 if (warningp && inhibit_warnings)
1066 if (warningp && !warnings_are_errors)
1070 static int warning_message = 0;
1072 if (warningp && !warning_message)
1074 fprintf (stderr, "%s: warnings being treated as errors\n", progname);
1075 warning_message = 1;
1083 /* Print a fatal error message. NAME is the text.
1084 Also include a system error message based on `errno'. */
1087 pfatal_with_name (name)
1090 fprintf (stderr, "%s: ", progname);
1092 exit (FATAL_EXIT_CODE);
1096 fatal_io_error (name)
1099 fprintf (stderr, "%s: %s: I/O error\n", progname, name);
1100 exit (FATAL_EXIT_CODE);
1103 /* Called to give a better error message for a bad insn rather than
1104 just calling abort(). */
1107 fatal_insn (message, insn)
1111 if (!output_bytecode)
1117 fflush (asm_out_file);
1119 fflush (aux_info_file);
1121 fflush (rtl_dump_file);
1122 if (jump_opt_dump_file)
1123 fflush (jump_opt_dump_file);
1124 if (addressof_dump_file)
1125 fflush (addressof_dump_file);
1127 fflush (cse_dump_file);
1129 fflush (loop_dump_file);
1131 fflush (cse2_dump_file);
1133 fflush (flow_dump_file);
1134 if (combine_dump_file)
1135 fflush (combine_dump_file);
1136 if (regmove_dump_file)
1137 fflush (regmove_dump_file);
1138 if (sched_dump_file)
1139 fflush (sched_dump_file);
1140 if (local_reg_dump_file)
1141 fflush (local_reg_dump_file);
1142 if (global_reg_dump_file)
1143 fflush (global_reg_dump_file);
1144 if (sched2_dump_file)
1145 fflush (sched2_dump_file);
1146 if (jump2_opt_dump_file)
1147 fflush (jump2_opt_dump_file);
1148 if (dbr_sched_dump_file)
1149 fflush (dbr_sched_dump_file);
1150 if (stack_reg_dump_file)
1151 fflush (stack_reg_dump_file);
1157 /* Called to give a better error message when we don't have an insn to match
1158 what we are looking for or if the insn's constraints aren't satisfied,
1159 rather than just calling abort(). */
1162 fatal_insn_not_found (insn)
1165 if (INSN_CODE (insn) < 0)
1166 fatal_insn ("internal error--unrecognizable insn:", insn);
1168 fatal_insn ("internal error--insn does not satisfy its constraints:", insn);
1171 /* This is the default decl_printable_name function. */
1174 decl_name (decl, verbosity)
1178 return IDENTIFIER_POINTER (DECL_NAME (decl));
1181 static int need_error_newline;
1183 /* Function of last error message;
1184 more generally, function such that if next error message is in it
1185 then we don't have to mention the function name. */
1186 static tree last_error_function = NULL;
1188 /* Used to detect when input_file_stack has changed since last described. */
1189 static int last_error_tick;
1191 /* Called when the start of a function definition is parsed,
1192 this function prints on stderr the name of the function. */
1195 announce_function (decl)
1200 if (rtl_dump_and_exit)
1201 fprintf (stderr, "%s ", IDENTIFIER_POINTER (DECL_NAME (decl)));
1203 fprintf (stderr, " %s", (*decl_printable_name) (decl, 2));
1205 need_error_newline = 1;
1206 last_error_function = current_function_decl;
1210 /* The default function to print out name of current function that caused
1214 default_print_error_function (file)
1217 if (last_error_function != current_function_decl)
1219 char *kind = "function";
1220 if (current_function_decl != 0
1221 && TREE_CODE (TREE_TYPE (current_function_decl)) == METHOD_TYPE)
1225 fprintf (stderr, "%s: ", file);
1227 if (current_function_decl == NULL)
1228 fprintf (stderr, "At top level:\n");
1231 char *name = (*decl_printable_name) (current_function_decl, 2);
1232 fprintf (stderr, "In %s `%s':\n", kind, name);
1235 last_error_function = current_function_decl;
1239 /* Called by report_error_function to print out function name.
1240 * Default may be overridden by language front-ends. */
1242 void (*print_error_function) PROTO((char *)) = default_print_error_function;
1244 /* Prints out, if necessary, the name of the current function
1245 that caused an error. Called from all error and warning functions. */
1248 report_error_function (file)
1251 struct file_stack *p;
1253 if (need_error_newline)
1255 fprintf (stderr, "\n");
1256 need_error_newline = 0;
1259 (*print_error_function) (file);
1261 if (input_file_stack && input_file_stack->next != 0
1262 && input_file_stack_tick != last_error_tick
1263 && file == input_filename)
1265 fprintf (stderr, "In file included");
1266 for (p = input_file_stack->next; p; p = p->next)
1268 fprintf (stderr, " from %s:%d", p->name, p->line);
1270 fprintf (stderr, ",\n ");
1272 fprintf (stderr, ":\n");
1273 last_error_tick = input_file_stack_tick;
1277 /* Print a message. */
1280 vmessage (prefix, s, ap)
1286 fprintf (stderr, "%s: ", prefix);
1289 vfprintf (stderr, s, ap);
1292 HOST_WIDE_INT v1 = va_arg(ap, HOST_WIDE_INT);
1293 HOST_WIDE_INT v2 = va_arg(ap, HOST_WIDE_INT);
1294 HOST_WIDE_INT v3 = va_arg(ap, HOST_WIDE_INT);
1295 HOST_WIDE_INT v4 = va_arg(ap, HOST_WIDE_INT);
1296 fprintf (stderr, s, v1, v2, v3, v4);
1301 /* Print a message relevant to line LINE of file FILE. */
1304 v_message_with_file_and_line (file, line, prefix, s, ap)
1312 fprintf (stderr, "%s:%d: ", file, line);
1314 fprintf (stderr, "%s: ", progname);
1316 vmessage (prefix, s, ap);
1317 fputc ('\n', stderr);
1320 /* Print a message relevant to the given DECL. */
1323 v_message_with_decl (decl, prefix, s, ap)
1331 fprintf (stderr, "%s:%d: ",
1332 DECL_SOURCE_FILE (decl), DECL_SOURCE_LINE (decl));
1335 fprintf (stderr, "%s: ", prefix);
1337 /* Do magic to get around lack of varargs support for insertion
1338 of arguments into existing list. We know that the decl is first;
1339 we ass_u_me that it will be printed with "%s". */
1341 for (p = s; *p; ++p)
1345 if (*(p + 1) == '%')
1352 if (p > s) /* Print the left-hand substring. */
1354 char fmt[sizeof "%.255s"];
1357 if (width > 255L) width = 255L; /* arbitrary */
1358 sprintf (fmt, "%%.%lds", width);
1359 fprintf (stderr, fmt, s);
1362 if (*p == '%') /* Print the name. */
1364 char *n = (DECL_NAME (decl)
1365 ? (*decl_printable_name) (decl, 2)
1371 if (isalpha (*(p - 1) & 0xFF))
1376 if (*p) /* Print the rest of the message. */
1377 vmessage ((char *)NULL, p, ap);
1379 fputc ('\n', stderr);
1382 /* Figure file and line of the given INSN. */
1385 file_and_line_for_asm (insn, pfile, pline)
1390 rtx body = PATTERN (insn);
1393 /* Find the (or one of the) ASM_OPERANDS in the insn. */
1394 if (GET_CODE (body) == SET && GET_CODE (SET_SRC (body)) == ASM_OPERANDS)
1395 asmop = SET_SRC (body);
1396 else if (GET_CODE (body) == ASM_OPERANDS)
1398 else if (GET_CODE (body) == PARALLEL
1399 && GET_CODE (XVECEXP (body, 0, 0)) == SET)
1400 asmop = SET_SRC (XVECEXP (body, 0, 0));
1401 else if (GET_CODE (body) == PARALLEL
1402 && GET_CODE (XVECEXP (body, 0, 0)) == ASM_OPERANDS)
1403 asmop = XVECEXP (body, 0, 0);
1409 *pfile = ASM_OPERANDS_SOURCE_FILE (asmop);
1410 *pline = ASM_OPERANDS_SOURCE_LINE (asmop);
1414 *pfile = input_filename;
1419 /* Report an error at line LINE of file FILE. */
1422 v_error_with_file_and_line (file, line, s, ap)
1429 report_error_function (file);
1430 v_message_with_file_and_line (file, line, (char *)NULL, s, ap);
1434 error_with_file_and_line VPROTO((char *file, int line, char *s, ...))
1446 file = va_arg (ap, char *);
1447 line = va_arg (ap, int);
1448 s = va_arg (ap, char *);
1451 v_error_with_file_and_line (file, line, s, ap);
1455 /* Report an error at the declaration DECL.
1456 S is a format string which uses %s to substitute the declaration
1457 name; subsequent substitutions are a la printf. */
1460 v_error_with_decl (decl, s, ap)
1466 report_error_function (DECL_SOURCE_FILE (decl));
1467 v_message_with_decl (decl, (char *)NULL, s, ap);
1471 error_with_decl VPROTO((tree decl, char *s, ...))
1482 decl = va_arg (ap, tree);
1483 s = va_arg (ap, char *);
1486 v_error_with_decl (decl, s, ap);
1490 /* Report an error at the line number of the insn INSN.
1491 This is used only when INSN is an `asm' with operands,
1492 and each ASM_OPERANDS records its own source file and line. */
1495 v_error_for_asm (insn, s, ap)
1504 file_and_line_for_asm (insn, &file, &line);
1505 report_error_function (file);
1506 v_message_with_file_and_line (file, line, (char *)NULL, s, ap);
1510 error_for_asm VPROTO((rtx insn, char *s, ...))
1521 insn = va_arg (ap, rtx);
1522 s = va_arg (ap, char *);
1525 v_error_for_asm (insn, s, ap);
1529 /* Report an error at the current line number. */
1536 v_error_with_file_and_line (input_filename, lineno, s, ap);
1540 error VPROTO((char *s, ...))
1550 s = va_arg (ap, char *);
1557 /* Report a fatal error at the current line number. */
1565 exit (FATAL_EXIT_CODE);
1569 fatal VPROTO((char *s, ...))
1579 s = va_arg (ap, char *);
1586 /* Report a warning at line LINE of file FILE. */
1589 v_warning_with_file_and_line (file, line, s, ap)
1595 if (count_error (1))
1597 report_error_function (file);
1598 v_message_with_file_and_line (file, line, "warning", s, ap);
1603 warning_with_file_and_line VPROTO((char *file, int line, char *s, ...))
1615 file = va_arg (ap, char *);
1616 line = va_arg (ap, int);
1617 s = va_arg (ap, char *);
1620 v_warning_with_file_and_line (file, line, s, ap);
1624 /* Report a warning at the declaration DECL.
1625 S is a format string which uses %s to substitute the declaration
1626 name; subsequent substitutions are a la printf. */
1629 v_warning_with_decl (decl, s, ap)
1634 if (count_error (1))
1636 report_error_function (DECL_SOURCE_FILE (decl));
1637 v_message_with_decl (decl, "warning", s, ap);
1642 warning_with_decl VPROTO((tree decl, char *s, ...))
1653 decl = va_arg (ap, tree);
1654 s = va_arg (ap, char *);
1657 v_warning_with_decl (decl, s, ap);
1661 /* Report a warning at the line number of the insn INSN.
1662 This is used only when INSN is an `asm' with operands,
1663 and each ASM_OPERANDS records its own source file and line. */
1666 v_warning_for_asm (insn, s, ap)
1671 if (count_error (1))
1676 file_and_line_for_asm (insn, &file, &line);
1677 report_error_function (file);
1678 v_message_with_file_and_line (file, line, "warning", s, ap);
1683 warning_for_asm VPROTO((rtx insn, char *s, ...))
1694 insn = va_arg (ap, rtx);
1695 s = va_arg (ap, char *);
1698 v_warning_for_asm (insn, s, ap);
1702 /* Report a warning at the current line number. */
1709 v_warning_with_file_and_line (input_filename, lineno, s, ap);
1713 warning VPROTO((char *s, ...))
1723 s = va_arg (ap, char *);
1730 /* These functions issue either warnings or errors depending on
1731 -pedantic-errors. */
1738 if (flag_pedantic_errors)
1745 pedwarn VPROTO((char *s, ...))
1755 s = va_arg (ap, char *);
1763 v_pedwarn_with_decl (decl, s, ap)
1768 /* We don't want -pedantic-errors to cause the compilation to fail from
1769 "errors" in system header files. Sometimes fixincludes can't fix what's
1770 broken (eg: unsigned char bitfields - fixing it may change the alignment
1771 which will cause programs to mysteriously fail because the C library
1772 or kernel uses the original layout). There's no point in issuing a
1773 warning either, it's just unnecessary noise. */
1775 if (! DECL_IN_SYSTEM_HEADER (decl))
1777 if (flag_pedantic_errors)
1778 v_error_with_decl (decl, s, ap);
1780 v_warning_with_decl (decl, s, ap);
1785 pedwarn_with_decl VPROTO((tree decl, char *s, ...))
1796 decl = va_arg (ap, tree);
1797 s = va_arg (ap, char *);
1800 v_pedwarn_with_decl (decl, s, ap);
1805 v_pedwarn_with_file_and_line (file, line, s, ap)
1811 if (flag_pedantic_errors)
1812 v_error_with_file_and_line (file, line, s, ap);
1814 v_warning_with_file_and_line (file, line, s, ap);
1818 pedwarn_with_file_and_line VPROTO((char *file, int line, char *s, ...))
1830 file = va_arg (ap, char *);
1831 line = va_arg (ap, int);
1832 s = va_arg (ap, char *);
1835 v_pedwarn_with_file_and_line (file, line, s, ap);
1839 /* Apologize for not implementing some feature. */
1848 fprintf (stderr, "%s:%d: ", input_filename, lineno);
1850 fprintf (stderr, "%s: ", progname);
1851 vmessage ("sorry, not implemented", s, ap);
1852 fputc ('\n', stderr);
1856 sorry VPROTO((char *s, ...))
1866 s = va_arg (ap, char *);
1873 /* Apologize for not implementing some feature, then quit. */
1876 v_really_sorry (s, ap)
1882 fprintf (stderr, "%s:%d: ", input_filename, lineno);
1884 fprintf (stderr, "%s: ", progname);
1885 vmessage ("sorry, not implemented", s, ap);
1886 fatal (" (fatal)\n");
1890 really_sorry VPROTO((char *s, ...))
1900 s = va_arg (ap, char *);
1903 v_really_sorry (s, ap);
1907 /* More 'friendly' abort that prints the line and file.
1908 config.h can #define abort fancy_abort if you like that sort of thing.
1910 I don't think this is actually a good idea.
1911 Other sorts of crashes will look a certain way.
1912 It is a good thing if crashes from calling abort look the same way.
1918 fatal ("internal gcc abort");
1921 /* This calls abort and is used to avoid problems when abort if a macro.
1922 It is used when we need to pass the address of abort. */
1930 /* When `malloc.c' is compiled with `rcheck' defined,
1931 it calls this function to report clobberage. */
1939 /* Same as `malloc' but report error if no memory available. */
1945 register char *value = (char *) malloc (size);
1946 if (value == 0 && size != 0)
1947 fatal ("virtual memory exhausted");
1951 /* Same as `realloc' but report error if no memory available.
1952 Also handle null PTR even if the vendor realloc gets it wrong. */
1955 xrealloc (ptr, size)
1960 ? (char *) realloc (ptr, size)
1961 : (char *) malloc (size));
1963 fatal ("virtual memory exhausted");
1967 /* Same as `strdup' but report error if no memory available. */
1973 register char *result = (char *) malloc (strlen (s) + 1);
1976 fatal ("virtual memory exhausted");
1981 /* Return the logarithm of X, base 2, considering X unsigned,
1982 if X is a power of 2. Otherwise, returns -1.
1984 This should be used via the `exact_log2' macro. */
1988 register unsigned HOST_WIDE_INT x;
1990 register int log = 0;
1991 /* Test for 0 or a power of 2. */
1992 if (x == 0 || x != (x & -x))
1994 while ((x >>= 1) != 0)
1999 /* Given X, an unsigned number, return the largest int Y such that 2**Y <= X.
2000 If X is 0, return -1.
2002 This should be used via the floor_log2 macro. */
2006 register unsigned HOST_WIDE_INT x;
2008 register int log = -1;
2015 static int float_handler_set;
2017 jmp_buf float_handler;
2019 /* Signals actually come here. */
2022 float_signal (signo)
2023 /* If this is missing, some compilers complain. */
2026 if (float_handled == 0)
2028 #if defined (USG) || defined (hpux)
2029 signal (SIGFPE, float_signal); /* re-enable the signal catcher */
2032 signal (SIGFPE, float_signal);
2033 longjmp (float_handler, 1);
2036 /* Specify where to longjmp to when a floating arithmetic error happens.
2037 If HANDLER is 0, it means don't handle the errors any more. */
2040 set_float_handler (handler)
2043 float_handled = (handler != 0);
2045 bcopy ((char *) handler, (char *) float_handler, sizeof (float_handler));
2047 if (float_handled && ! float_handler_set)
2049 signal (SIGFPE, float_signal);
2050 float_handler_set = 1;
2054 /* Specify, in HANDLER, where to longjmp to when a floating arithmetic
2055 error happens, pushing the previous specification into OLD_HANDLER.
2056 Return an indication of whether there was a previous handler in effect. */
2059 push_float_handler (handler, old_handler)
2060 jmp_buf handler, old_handler;
2062 int was_handled = float_handled;
2066 bcopy ((char *) float_handler, (char *) old_handler,
2067 sizeof (float_handler));
2069 bcopy ((char *) handler, (char *) float_handler, sizeof (float_handler));
2073 /* Restore the previous specification of whether and where to longjmp to
2074 when a floating arithmetic error happens. */
2077 pop_float_handler (handled, handler)
2081 float_handled = handled;
2083 bcopy ((char *) handler, (char *) float_handler, sizeof (float_handler));
2086 /* Handler for SIGPIPE. */
2090 /* If this is missing, some compilers complain. */
2093 fatal ("output pipe has been closed");
2096 /* Strip off a legitimate source ending from the input string NAME of
2097 length LEN. Rather than having to know the names used by all of
2098 our front ends, we strip off an ending of a period followed by one,
2099 two, or three characters. */
2102 strip_off_ending (name, len)
2106 if (len > 2 && name[len - 2] == '.')
2107 name[len - 2] = '\0';
2108 else if (len > 3 && name[len - 3] == '.')
2109 name[len - 3] = '\0';
2110 else if (len > 4 && name[len - 4] == '.')
2111 name[len - 4] = '\0';
2114 /* Output a quoted string. */
2117 output_quoted_string (asm_file, string)
2121 #ifdef OUTPUT_QUOTED_STRING
2122 OUTPUT_QUOTED_STRING (asm_file, string);
2126 putc ('\"', asm_file);
2127 while ((c = *string++) != 0)
2129 if (c == '\"' || c == '\\')
2130 putc ('\\', asm_file);
2133 putc ('\"', asm_file);
2137 /* Output a file name in the form wanted by System V. */
2140 output_file_directive (asm_file, input_name)
2144 int len = strlen (input_name);
2145 char *na = input_name + len;
2147 /* NA gets INPUT_NAME sans directory names. */
2148 while (na > input_name)
2155 #ifdef ASM_OUTPUT_MAIN_SOURCE_FILENAME
2156 ASM_OUTPUT_MAIN_SOURCE_FILENAME (asm_file, na);
2158 #ifdef ASM_OUTPUT_SOURCE_FILENAME
2159 ASM_OUTPUT_SOURCE_FILENAME (asm_file, na);
2161 fprintf (asm_file, "\t.file\t");
2162 output_quoted_string (asm_file, na);
2163 fputc ('\n', asm_file);
2168 /* Routine to build language identifier for object file. */
2171 output_lang_identify (asm_out_file)
2174 int len = strlen (lang_identify ()) + sizeof ("__gnu_compiled_") + 1;
2175 char *s = (char *) alloca (len);
2176 sprintf (s, "__gnu_compiled_%s", lang_identify ());
2177 ASM_OUTPUT_LABEL (asm_out_file, s);
2180 /* Routine to open a dump file. */
2183 open_dump_file (base_name, suffix)
2188 char *dumpname = (char *) alloca (strlen (base_name) + strlen (suffix) + 1);
2190 strcpy (dumpname, base_name);
2191 strcat (dumpname, suffix);
2192 f = fopen (dumpname, "w");
2194 pfatal_with_name (dumpname);
2198 /* Compile an entire file of output from cpp, named NAME.
2199 Write a file of assembly output and various debugging dumps. */
2208 int name_specified = name != 0;
2210 if (dump_base_name == 0)
2211 dump_base_name = name ? name : "gccdump";
2215 integration_time = 0;
2220 branch_prob_time = 0;
2225 local_alloc_time = 0;
2226 global_alloc_time = 0;
2229 shorten_branch_time = 0;
2236 /* Open input file. */
2238 if (name == 0 || !strcmp (name, "-"))
2244 finput = fopen (name, "r");
2246 pfatal_with_name (name);
2248 #ifdef IO_BUFFER_SIZE
2249 setvbuf (finput, (char *) xmalloc (IO_BUFFER_SIZE), _IOFBF, IO_BUFFER_SIZE);
2251 #endif /* !USE_CPPLIB */
2253 /* Initialize data in various passes. */
2262 /* Some of these really don't need to be called when generating bytecode,
2263 but the options would have to be parsed first to know that. -bson */
2265 init_emit_once (debug_info_level == DINFO_LEVEL_NORMAL
2266 || debug_info_level == DINFO_LEVEL_VERBOSE
2267 || flag_test_coverage);
2269 init_decl_processing ();
2277 if (flag_caller_saves)
2278 init_caller_save ();
2280 /* If auxiliary info generation is desired, open the output file.
2281 This goes in the same directory as the source file--unlike
2282 all the other output files. */
2283 if (flag_gen_aux_info)
2285 aux_info_file = fopen (aux_info_file_name, "w");
2286 if (aux_info_file == 0)
2287 pfatal_with_name (aux_info_file_name);
2290 /* If rtl dump desired, open the output file. */
2292 rtl_dump_file = open_dump_file (dump_base_name, ".rtl");
2294 /* If jump_opt dump desired, open the output file. */
2296 jump_opt_dump_file = open_dump_file (dump_base_name, ".jump");
2298 /* If addressof dump desired, open the output file. */
2300 addressof_dump_file = open_dump_file (dump_base_name, ".addressof");
2302 /* If cse dump desired, open the output file. */
2304 cse_dump_file = open_dump_file (dump_base_name, ".cse");
2306 /* If loop dump desired, open the output file. */
2308 loop_dump_file = open_dump_file (dump_base_name, ".loop");
2310 /* If cse2 dump desired, open the output file. */
2312 cse2_dump_file = open_dump_file (dump_base_name, ".cse2");
2314 /* If branch_prob dump desired, open the output file. */
2315 if (branch_prob_dump)
2316 branch_prob_dump_file = open_dump_file (dump_base_name, ".bp");
2318 /* If flow dump desired, open the output file. */
2320 flow_dump_file = open_dump_file (dump_base_name, ".flow");
2322 /* If combine dump desired, open the output file. */
2324 combine_dump_file = open_dump_file (dump_base_name, ".combine");
2326 /* If regmove dump desired, open the output file. */
2328 regmove_dump_file = open_dump_file (dump_base_name, ".regmove");
2330 /* If scheduling dump desired, open the output file. */
2332 sched_dump_file = open_dump_file (dump_base_name, ".sched");
2334 /* If local_reg dump desired, open the output file. */
2336 local_reg_dump_file = open_dump_file (dump_base_name, ".lreg");
2338 /* If global_reg dump desired, open the output file. */
2339 if (global_reg_dump)
2340 global_reg_dump_file = open_dump_file (dump_base_name, ".greg");
2342 /* If 2nd scheduling dump desired, open the output file. */
2344 sched2_dump_file = open_dump_file (dump_base_name, ".sched2");
2346 /* If jump2_opt dump desired, open the output file. */
2348 jump2_opt_dump_file = open_dump_file (dump_base_name, ".jump2");
2350 /* If dbr_sched dump desired, open the output file. */
2352 dbr_sched_dump_file = open_dump_file (dump_base_name, ".dbr");
2356 /* If stack_reg dump desired, open the output file. */
2358 stack_reg_dump_file = open_dump_file (dump_base_name, ".stack");
2362 /* Open assembler code output file. */
2364 if (! name_specified && asm_file_name == 0)
2365 asm_out_file = stdout;
2368 int len = strlen (dump_base_name);
2369 register char *dumpname = (char *) xmalloc (len + 6);
2370 strcpy (dumpname, dump_base_name);
2371 strip_off_ending (dumpname, len);
2372 strcat (dumpname, ".s");
2373 if (asm_file_name == 0)
2375 asm_file_name = (char *) xmalloc (strlen (dumpname) + 1);
2376 strcpy (asm_file_name, dumpname);
2378 if (!strcmp (asm_file_name, "-"))
2379 asm_out_file = stdout;
2381 asm_out_file = fopen (asm_file_name, "w");
2382 if (asm_out_file == 0)
2383 pfatal_with_name (asm_file_name);
2386 #ifdef IO_BUFFER_SIZE
2387 setvbuf (asm_out_file, (char *) xmalloc (IO_BUFFER_SIZE),
2388 _IOFBF, IO_BUFFER_SIZE);
2391 input_filename = name;
2393 /* Put an entry on the input file stack for the main input file. */
2395 = (struct file_stack *) xmalloc (sizeof (struct file_stack));
2396 input_file_stack->next = 0;
2397 input_file_stack->name = input_filename;
2399 /* Gross. Gross. lang_init is (I think) the first callback into
2400 the language front end, and is thus the first opportunity to
2401 have the selected language override the default value for any
2404 So the default value for flag_exceptions is 2 (uninitialized).
2405 If we encounter -fno-exceptions or -fexceptions, then flag_exceptions
2406 will be set to zero or one respectively.
2408 flag_exceptions can also be set by lang_init to something other
2409 than the default "uninitialized" value of 2.
2411 After lang_init, if the value is still 2, then we default to
2412 -fno-exceptions (value will be reset to zero).
2414 When our EH mechanism is low enough overhead that we can enable
2415 it by default for languages other than C++, then all this braindamage
2418 /* Perform language-specific initialization.
2419 This may set main_input_filename. */
2422 if (flag_exceptions == 2)
2423 flag_exceptions = 0;
2425 /* If the input doesn't start with a #line, use the input name
2426 as the official input file name. */
2427 if (main_input_filename == 0)
2428 main_input_filename = name;
2430 if (!output_bytecode)
2432 ASM_FILE_START (asm_out_file);
2434 #ifdef ASM_COMMENT_START
2435 if (flag_verbose_asm)
2437 /* Print the list of options in effect. */
2438 print_version (asm_out_file, ASM_COMMENT_START);
2439 print_switch_values (asm_out_file, 0, MAX_LINE,
2440 ASM_COMMENT_START, " ", "\n");
2441 /* Add a blank line here so it appears in assembler output but not
2443 fprintf (asm_out_file, "\n");
2448 /* Output something to inform GDB that this compilation was by GCC. Also
2449 serves to tell GDB file consists of bytecodes. */
2450 if (output_bytecode)
2451 fprintf (asm_out_file, "bc_gcc2_compiled.:\n");
2454 #ifndef ASM_IDENTIFY_GCC
2455 fprintf (asm_out_file, "gcc2_compiled.:\n");
2457 ASM_IDENTIFY_GCC (asm_out_file);
2461 /* Output something to identify which front-end produced this file. */
2462 #ifdef ASM_IDENTIFY_LANGUAGE
2463 ASM_IDENTIFY_LANGUAGE (asm_out_file);
2466 #ifndef ASM_OUTPUT_SECTION_NAME
2467 if (flag_function_sections)
2469 warning ("-ffunction-sections not supported for this target.");
2470 flag_function_sections = 0;
2474 if (flag_function_sections
2475 && (profile_flag || profile_block_flag))
2477 warning ("-ffunction-sections disabled; it makes profiling impossible.");
2478 flag_function_sections = 0;
2481 if (flag_function_sections && write_symbols != NO_DEBUG)
2482 warning ("-ffunction-sections may affect debugging on some targets.");
2484 if (output_bytecode)
2486 if (profile_flag || profile_block_flag)
2487 error ("profiling not supported in bytecode compilation");
2491 /* ??? Note: There used to be a conditional here
2492 to call assemble_zeros without fail if DBX_DEBUGGING_INFO is defined.
2493 This was to guarantee separation between gcc_compiled. and
2494 the first function, for the sake of dbx on Suns.
2495 However, having the extra zero here confused the Emacs
2496 code for unexec, and might confuse other programs too.
2497 Therefore, I took out that change.
2498 In future versions we should find another way to solve
2499 that dbx problem. -- rms, 23 May 93. */
2501 /* Don't let the first function fall at the same address
2502 as gcc_compiled., if profiling. */
2503 if (profile_flag || profile_block_flag)
2504 assemble_zeros (UNITS_PER_WORD);
2507 /* If dbx symbol table desired, initialize writing it
2508 and output the predefined types. */
2509 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
2510 if (write_symbols == DBX_DEBUG || write_symbols == XCOFF_DEBUG)
2511 TIMEVAR (symout_time, dbxout_init (asm_out_file, main_input_filename,
2514 #ifdef SDB_DEBUGGING_INFO
2515 if (write_symbols == SDB_DEBUG)
2516 TIMEVAR (symout_time, sdbout_init (asm_out_file, main_input_filename,
2519 #ifdef DWARF_DEBUGGING_INFO
2520 if (write_symbols == DWARF_DEBUG)
2521 TIMEVAR (symout_time, dwarfout_init (asm_out_file, main_input_filename));
2523 #ifdef DWARF2_UNWIND_INFO
2524 if (dwarf2out_do_frame ())
2525 dwarf2out_frame_init ();
2527 #ifdef DWARF2_DEBUGGING_INFO
2528 if (write_symbols == DWARF2_DEBUG)
2529 TIMEVAR (symout_time, dwarf2out_init (asm_out_file, main_input_filename));
2532 /* Initialize yet another pass. */
2534 if (!output_bytecode)
2535 init_final (main_input_filename);
2536 init_branch_prob (dump_base_name);
2538 start_time = get_run_time ();
2540 /* Call the parser, which parses the entire file
2541 (calling rest_of_compilation for each function). */
2543 if (yyparse () != 0)
2545 if (errorcount == 0)
2546 fprintf (stderr, "Errors detected in input file (your bison.simple is out of date)");
2548 /* In case there were missing closebraces,
2549 get us back to the global binding level. */
2550 while (! global_bindings_p ())
2554 output_func_start_profiler ();
2556 /* Compilation is now finished except for writing
2557 what's left of the symbol table output. */
2559 parse_time += get_run_time () - start_time;
2561 parse_time -= integration_time;
2562 parse_time -= varconst_time;
2564 globals = getdecls ();
2566 /* Really define vars that have had only a tentative definition.
2567 Really output inline functions that must actually be callable
2568 and have not been output so far. */
2571 int len = list_length (globals);
2572 tree *vec = (tree *) alloca (sizeof (tree) * len);
2577 /* Process the decls in reverse order--earliest first.
2578 Put them into VEC from back to front, then take out from front. */
2580 for (i = 0, decl = globals; i < len; i++, decl = TREE_CHAIN (decl))
2581 vec[len - i - 1] = decl;
2583 for (i = 0; i < len; i++)
2587 /* We're not deferring this any longer. */
2588 DECL_DEFER_OUTPUT (decl) = 0;
2590 if (TREE_CODE (decl) == VAR_DECL && DECL_SIZE (decl) == 0
2591 && incomplete_decl_finalize_hook != 0)
2592 (*incomplete_decl_finalize_hook) (decl);
2595 /* Now emit any global variables or functions that we have been putting
2596 off. We need to loop in case one of the things emitted here
2597 references another one which comes earlier in the list. */
2601 for (i = 0; i < len; i++)
2605 if (TREE_ASM_WRITTEN (decl) || DECL_EXTERNAL (decl))
2608 /* Don't write out static consts, unless we still need them.
2610 We also keep static consts if not optimizing (for debugging),
2611 unless the user specified -fno-keep-static-consts.
2612 ??? They might be better written into the debug information.
2613 This is possible when using DWARF.
2615 A language processor that wants static constants to be always
2616 written out (even if it is not used) is responsible for
2617 calling rest_of_decl_compilation itself. E.g. the C front-end
2618 calls rest_of_decl_compilation from finish_decl.
2619 One motivation for this is that is conventional in some
2620 environments to write things like:
2621 static const char rcsid[] = "... version string ...";
2622 intending to force the string to be in the executable.
2624 A language processor that would prefer to have unneeded
2625 static constants "optimized away" would just defer writing
2626 them out until here. E.g. C++ does this, because static
2627 constants are often defined in header files.
2629 ??? A tempting alternative (for both C and C++) would be
2630 to force a constant to be written if and only if it is
2631 defined in a main file, as opposed to an include file. */
2633 if (TREE_CODE (decl) == VAR_DECL && TREE_STATIC (decl)
2634 && (! TREE_READONLY (decl)
2635 || TREE_PUBLIC (decl)
2636 || (!optimize && flag_keep_static_consts)
2637 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl))))
2640 rest_of_decl_compilation (decl, NULL_PTR, 1, 1);
2643 if (TREE_CODE (decl) == FUNCTION_DECL
2644 && DECL_INITIAL (decl) != 0
2645 && DECL_SAVED_INSNS (decl) != 0
2646 && (flag_keep_inline_functions
2647 || TREE_PUBLIC (decl)
2648 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl))))
2651 temporary_allocation ();
2652 output_inline_function (decl);
2653 permanent_allocation (1);
2658 /* Now that all possible functions have been output, we can dump
2659 the exception table. */
2661 output_exception_table ();
2663 for (i = 0; i < len; i++)
2667 if (TREE_CODE (decl) == VAR_DECL && TREE_STATIC (decl)
2668 && ! TREE_ASM_WRITTEN (decl))
2669 /* Cancel the RTL for this decl so that, if debugging info
2670 output for global variables is still to come,
2671 this one will be omitted. */
2672 DECL_RTL (decl) = NULL;
2674 /* Warn about any function
2675 declared static but not defined.
2676 We don't warn about variables,
2677 because many programs have static variables
2678 that exist only to get some text into the object file. */
2679 if (TREE_CODE (decl) == FUNCTION_DECL
2681 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl)))
2682 && DECL_INITIAL (decl) == 0
2683 && DECL_EXTERNAL (decl)
2684 && ! DECL_ARTIFICIAL (decl)
2685 && ! TREE_PUBLIC (decl))
2687 pedwarn_with_decl (decl,
2688 "`%s' declared `static' but never defined");
2689 /* This symbol is effectively an "extern" declaration now. */
2690 TREE_PUBLIC (decl) = 1;
2691 assemble_external (decl);
2694 /* Warn about static fns or vars defined but not used,
2695 but not about inline functions or static consts
2696 since defining those in header files is normal practice. */
2698 && ((TREE_CODE (decl) == FUNCTION_DECL && ! DECL_INLINE (decl))
2699 || (TREE_CODE (decl) == VAR_DECL && ! TREE_READONLY (decl)))
2700 && ! DECL_IN_SYSTEM_HEADER (decl)
2701 && ! DECL_EXTERNAL (decl)
2702 && ! TREE_PUBLIC (decl)
2703 && ! TREE_USED (decl)
2704 && (TREE_CODE (decl) == FUNCTION_DECL || ! DECL_REGISTER (decl))
2705 /* The TREE_USED bit for file-scope decls
2706 is kept in the identifier, to handle multiple
2707 external decls in different scopes. */
2708 && ! TREE_USED (DECL_NAME (decl)))
2709 warning_with_decl (decl, "`%s' defined but not used");
2711 #ifdef SDB_DEBUGGING_INFO
2712 /* The COFF linker can move initialized global vars to the end.
2713 And that can screw up the symbol ordering.
2714 By putting the symbols in that order to begin with,
2715 we avoid a problem. mcsun!unido!fauern!tumuc!pes@uunet.uu.net. */
2716 if (write_symbols == SDB_DEBUG && TREE_CODE (decl) == VAR_DECL
2717 && TREE_PUBLIC (decl) && DECL_INITIAL (decl)
2718 && ! DECL_EXTERNAL (decl)
2719 && DECL_RTL (decl) != 0)
2720 TIMEVAR (symout_time, sdbout_symbol (decl, 0));
2722 /* Output COFF information for non-global
2723 file-scope initialized variables. */
2724 if (write_symbols == SDB_DEBUG
2725 && TREE_CODE (decl) == VAR_DECL
2726 && DECL_INITIAL (decl)
2727 && ! DECL_EXTERNAL (decl)
2728 && DECL_RTL (decl) != 0
2729 && GET_CODE (DECL_RTL (decl)) == MEM)
2730 TIMEVAR (symout_time, sdbout_toplevel_data (decl));
2731 #endif /* SDB_DEBUGGING_INFO */
2732 #ifdef DWARF_DEBUGGING_INFO
2733 /* Output DWARF information for file-scope tentative data object
2734 declarations, file-scope (extern) function declarations (which
2735 had no corresponding body) and file-scope tagged type declarations
2736 and definitions which have not yet been forced out. */
2738 if (write_symbols == DWARF_DEBUG
2739 && (TREE_CODE (decl) != FUNCTION_DECL || !DECL_INITIAL (decl)))
2740 TIMEVAR (symout_time, dwarfout_file_scope_decl (decl, 1));
2742 #ifdef DWARF2_DEBUGGING_INFO
2743 /* Output DWARF2 information for file-scope tentative data object
2744 declarations, file-scope (extern) function declarations (which
2745 had no corresponding body) and file-scope tagged type declarations
2746 and definitions which have not yet been forced out. */
2748 if (write_symbols == DWARF2_DEBUG
2749 && (TREE_CODE (decl) != FUNCTION_DECL || !DECL_INITIAL (decl)))
2750 TIMEVAR (symout_time, dwarf2out_decl (decl));
2755 /* Write out any pending weak symbol declarations. */
2759 /* Do dbx symbols */
2760 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
2761 if (write_symbols == DBX_DEBUG || write_symbols == XCOFF_DEBUG)
2762 TIMEVAR (symout_time,
2764 dbxout_finish (asm_out_file, main_input_filename);
2768 #ifdef DWARF_DEBUGGING_INFO
2769 if (write_symbols == DWARF_DEBUG)
2770 TIMEVAR (symout_time,
2776 #ifdef DWARF2_UNWIND_INFO
2777 if (dwarf2out_do_frame ())
2778 dwarf2out_frame_finish ();
2781 #ifdef DWARF2_DEBUGGING_INFO
2782 if (write_symbols == DWARF2_DEBUG)
2783 TIMEVAR (symout_time,
2785 dwarf2out_finish ();
2789 /* Output some stuff at end of file if nec. */
2791 if (!output_bytecode)
2793 end_final (dump_base_name);
2794 end_branch_prob (branch_prob_dump_file);
2797 ASM_FILE_END (asm_out_file);
2801 /* Language-specific end of compilation actions. */
2805 if (output_bytecode)
2806 bc_write_file (asm_out_file);
2808 /* Close the dump files. */
2810 if (flag_gen_aux_info)
2812 fclose (aux_info_file);
2814 unlink (aux_info_file_name);
2818 fclose (rtl_dump_file);
2821 fclose (jump_opt_dump_file);
2824 fclose (addressof_dump_file);
2827 fclose (cse_dump_file);
2830 fclose (loop_dump_file);
2833 fclose (cse2_dump_file);
2835 if (branch_prob_dump)
2836 fclose (branch_prob_dump_file);
2839 fclose (flow_dump_file);
2843 dump_combine_total_stats (combine_dump_file);
2844 fclose (combine_dump_file);
2848 fclose (regmove_dump_file);
2851 fclose (sched_dump_file);
2854 fclose (local_reg_dump_file);
2856 if (global_reg_dump)
2857 fclose (global_reg_dump_file);
2860 fclose (sched2_dump_file);
2863 fclose (jump2_opt_dump_file);
2866 fclose (dbr_sched_dump_file);
2870 fclose (stack_reg_dump_file);
2873 /* Close non-debugging input and output files. Take special care to note
2874 whether fclose returns an error, since the pages might still be on the
2875 buffer chain while the file is open. */
2882 if (ferror (asm_out_file) != 0 || fclose (asm_out_file) != 0)
2883 fatal_io_error (asm_file_name);
2885 /* Print the times. */
2889 fprintf (stderr,"\n");
2890 print_time ("parse", parse_time);
2892 if (!output_bytecode)
2894 print_time ("integration", integration_time);
2895 print_time ("jump", jump_time);
2896 print_time ("cse", cse_time);
2897 print_time ("loop", loop_time);
2898 print_time ("cse2", cse2_time);
2899 print_time ("branch-prob", branch_prob_time);
2900 print_time ("flow", flow_time);
2901 print_time ("combine", combine_time);
2902 print_time ("regmove", regmove_time);
2903 print_time ("sched", sched_time);
2904 print_time ("local-alloc", local_alloc_time);
2905 print_time ("global-alloc", global_alloc_time);
2906 print_time ("sched2", sched2_time);
2907 print_time ("dbranch", dbr_sched_time);
2908 print_time ("shorten-branch", shorten_branch_time);
2909 print_time ("stack-reg", stack_reg_time);
2910 print_time ("final", final_time);
2911 print_time ("varconst", varconst_time);
2912 print_time ("symout", symout_time);
2913 print_time ("dump", dump_time);
2918 /* This is called from various places for FUNCTION_DECL, VAR_DECL,
2919 and TYPE_DECL nodes.
2921 This does nothing for local (non-static) variables.
2922 Otherwise, it sets up the RTL and outputs any assembler code
2923 (label definition, storage allocation and initialization).
2925 DECL is the declaration. If ASMSPEC is nonzero, it specifies
2926 the assembler symbol name to be used. TOP_LEVEL is nonzero
2927 if this declaration is not within a function. */
2930 rest_of_decl_compilation (decl, asmspec, top_level, at_end)
2936 /* Declarations of variables, and of functions defined elsewhere. */
2938 /* The most obvious approach, to put an #ifndef around where
2939 this macro is used, doesn't work since it's inside a macro call. */
2940 #ifndef ASM_FINISH_DECLARE_OBJECT
2941 #define ASM_FINISH_DECLARE_OBJECT(FILE, DECL, TOP, END)
2944 /* Forward declarations for nested functions are not "external",
2945 but we need to treat them as if they were. */
2946 if (TREE_STATIC (decl) || DECL_EXTERNAL (decl)
2947 || TREE_CODE (decl) == FUNCTION_DECL)
2948 TIMEVAR (varconst_time,
2950 make_decl_rtl (decl, asmspec, top_level);
2951 /* Initialized extern variable exists to be replaced
2952 with its value, or represents something that will be
2953 output in another file. */
2954 if (! (TREE_CODE (decl) == VAR_DECL
2955 && DECL_EXTERNAL (decl) && TREE_READONLY (decl)
2956 && DECL_INITIAL (decl) != 0
2957 && DECL_INITIAL (decl) != error_mark_node))
2958 /* Don't output anything
2959 when a tentative file-scope definition is seen.
2960 But at end of compilation, do output code for them. */
2961 if (! (! at_end && top_level
2962 && (DECL_INITIAL (decl) == 0
2963 || DECL_INITIAL (decl) == error_mark_node)))
2964 assemble_variable (decl, top_level, at_end, 0);
2965 if (!output_bytecode
2966 && decl == last_assemble_variable_decl)
2968 ASM_FINISH_DECLARE_OBJECT (asm_out_file, decl,
2972 else if (DECL_REGISTER (decl) && asmspec != 0)
2974 if (decode_reg_name (asmspec) >= 0)
2976 DECL_RTL (decl) = 0;
2977 make_decl_rtl (decl, asmspec, top_level);
2980 error ("invalid register name `%s' for register variable", asmspec);
2982 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
2983 else if ((write_symbols == DBX_DEBUG || write_symbols == XCOFF_DEBUG)
2984 && TREE_CODE (decl) == TYPE_DECL)
2985 TIMEVAR (symout_time, dbxout_symbol (decl, 0));
2987 #ifdef SDB_DEBUGGING_INFO
2988 else if (write_symbols == SDB_DEBUG && top_level
2989 && TREE_CODE (decl) == TYPE_DECL)
2990 TIMEVAR (symout_time, sdbout_symbol (decl, 0));
2994 /* Called after finishing a record, union or enumeral type. */
2997 rest_of_type_compilation (type, toplev)
3001 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
3002 if (write_symbols == DBX_DEBUG || write_symbols == XCOFF_DEBUG)
3003 TIMEVAR (symout_time, dbxout_symbol (TYPE_STUB_DECL (type), !toplev));
3005 #ifdef SDB_DEBUGGING_INFO
3006 if (write_symbols == SDB_DEBUG)
3007 TIMEVAR (symout_time, sdbout_symbol (TYPE_STUB_DECL (type), !toplev));
3011 /* This is called from finish_function (within yyparse)
3012 after each top-level definition is parsed.
3013 It is supposed to compile that function or variable
3014 and output the assembler code for it.
3015 After we return, the tree storage is freed. */
3018 rest_of_compilation (decl)
3022 int start_time = get_run_time ();
3024 /* Nonzero if we have saved the original DECL_INITIAL of the function,
3025 to be restored after we finish compiling the function
3026 (for use when compiling inline calls to this function). */
3027 tree saved_block_tree = 0;
3028 /* Likewise, for DECL_ARGUMENTS. */
3029 tree saved_arguments = 0;
3032 if (output_bytecode)
3035 /* If we are reconsidering an inline function
3036 at the end of compilation, skip the stuff for making it inline. */
3038 if (DECL_SAVED_INSNS (decl) == 0)
3043 /* If requested, consider whether to make this function inline. */
3044 if (DECL_INLINE (decl) || flag_inline_functions)
3045 TIMEVAR (integration_time,
3047 lose = function_cannot_inline_p (decl);
3048 if (lose || ! optimize)
3050 if (warn_inline && DECL_INLINE (decl))
3051 warning_with_decl (decl, lose);
3052 DECL_ABSTRACT_ORIGIN (decl) = 0;
3053 /* Don't really compile an extern inline function.
3054 If we can't make it inline, pretend
3055 it was only declared. */
3056 if (DECL_EXTERNAL (decl))
3058 DECL_INITIAL (decl) = 0;
3059 goto exit_rest_of_compilation;
3063 /* ??? Note that this has the effect of making it look
3064 like "inline" was specified for a function if we choose
3065 to inline it. This isn't quite right, but it's
3066 probably not worth the trouble to fix. */
3067 inlinable = DECL_INLINE (decl) = 1;
3070 insns = get_insns ();
3072 /* Dump the rtl code if we are dumping rtl. */
3077 fprintf (rtl_dump_file, "\n;; Function %s\n\n",
3078 (*decl_printable_name) (decl, 2));
3079 if (DECL_SAVED_INSNS (decl))
3080 fprintf (rtl_dump_file, ";; (integrable)\n\n");
3081 print_rtl (rtl_dump_file, insns);
3082 fflush (rtl_dump_file);
3085 /* If we can, defer compiling inlines until EOF.
3086 save_for_inline_copying can be extremely expensive. */
3087 if (inlinable && ! decl_function_context (decl))
3088 DECL_DEFER_OUTPUT (decl) = 1;
3090 /* If function is inline, and we don't yet know whether to
3091 compile it by itself, defer decision till end of compilation.
3092 finish_compilation will call rest_of_compilation again
3093 for those functions that need to be output. Also defer those
3094 functions that we are supposed to defer. We cannot defer
3095 functions containing nested functions since the nested function
3096 data is in our non-saved obstack. */
3098 /* If this is a nested inline, remove ADDRESSOF now so we can
3099 finish compiling ourselves. Otherwise, wait until EOF.
3100 We have to do this because the purge_addressof transformation
3101 changes the DECL_RTL for many variables, which confuses integrate. */
3104 if (decl_function_context (decl))
3105 purge_addressof (insns);
3107 DECL_DEFER_OUTPUT (decl) = 1;
3110 if (! current_function_contains_functions
3111 && (DECL_DEFER_OUTPUT (decl)
3112 || (DECL_INLINE (decl)
3113 && ((! TREE_PUBLIC (decl) && ! TREE_ADDRESSABLE (decl)
3114 && ! flag_keep_inline_functions)
3115 || DECL_EXTERNAL (decl)))))
3117 DECL_DEFER_OUTPUT (decl) = 1;
3119 /* If -Wreturn-type, we have to do a bit of compilation. */
3120 if (! warn_return_type)
3122 #ifdef DWARF_DEBUGGING_INFO
3123 /* Generate the DWARF info for the "abstract" instance
3124 of a function which we may later generate inlined and/or
3125 out-of-line instances of. */
3126 if (write_symbols == DWARF_DEBUG)
3128 set_decl_abstract_flags (decl, 1);
3129 TIMEVAR (symout_time, dwarfout_file_scope_decl (decl, 0));
3130 set_decl_abstract_flags (decl, 0);
3133 #ifdef DWARF2_DEBUGGING_INFO
3134 /* Generate the DWARF2 info for the "abstract" instance
3135 of a function which we may later generate inlined and/or
3136 out-of-line instances of. */
3137 if (write_symbols == DWARF2_DEBUG)
3139 set_decl_abstract_flags (decl, 1);
3140 TIMEVAR (symout_time, dwarf2out_decl (decl));
3141 set_decl_abstract_flags (decl, 0);
3144 TIMEVAR (integration_time, save_for_inline_nocopy (decl));
3145 RTX_INTEGRATED_P (DECL_SAVED_INSNS (decl)) = inlinable;
3146 goto exit_rest_of_compilation;
3150 /* If we have to compile the function now, save its rtl and subdecls
3151 so that its compilation will not affect what others get. */
3152 if (inlinable || DECL_DEFER_OUTPUT (decl))
3154 #ifdef DWARF_DEBUGGING_INFO
3155 /* Generate the DWARF info for the "abstract" instance of
3156 a function which we will generate an out-of-line instance
3157 of almost immediately (and which we may also later generate
3158 various inlined instances of). */
3159 if (write_symbols == DWARF_DEBUG)
3161 set_decl_abstract_flags (decl, 1);
3162 TIMEVAR (symout_time, dwarfout_file_scope_decl (decl, 0));
3163 set_decl_abstract_flags (decl, 0);
3166 #ifdef DWARF2_DEBUGGING_INFO
3167 /* Generate the DWARF2 info for the "abstract" instance of
3168 a function which we will generate an out-of-line instance
3169 of almost immediately (and which we may also later generate
3170 various inlined instances of). */
3171 if (write_symbols == DWARF2_DEBUG)
3173 set_decl_abstract_flags (decl, 1);
3174 TIMEVAR (symout_time, dwarf2out_decl (decl));
3175 set_decl_abstract_flags (decl, 0);
3178 saved_block_tree = DECL_INITIAL (decl);
3179 saved_arguments = DECL_ARGUMENTS (decl);
3180 TIMEVAR (integration_time, save_for_inline_copying (decl));
3181 RTX_INTEGRATED_P (DECL_SAVED_INSNS (decl)) = inlinable;
3184 /* If specified extern inline but we aren't inlining it, we are
3186 if (DECL_INLINE (decl) && DECL_EXTERNAL (decl))
3187 goto exit_rest_of_compilation;
3190 if (! DECL_DEFER_OUTPUT (decl))
3191 TREE_ASM_WRITTEN (decl) = 1;
3193 /* Now that integrate will no longer see our rtl, we need not distinguish
3194 between the return value of this function and the return value of called
3196 rtx_equal_function_value_matters = 0;
3198 /* Don't return yet if -Wreturn-type; we need to do jump_optimize. */
3199 if ((rtl_dump_and_exit || flag_syntax_only) && !warn_return_type)
3201 goto exit_rest_of_compilation;
3204 /* Add an unwinder for exception handling, if needed.
3205 This must be done before we finalize PIC code. */
3209 /* If we are doing position-independent code generation, now
3210 is the time to output special prologues and epilogues.
3211 We do not want to do this earlier, because it just clutters
3212 up inline functions with meaningless insns. */
3217 /* From now on, allocate rtl in current_obstack, not in saveable_obstack.
3218 Note that that may have been done above, in save_for_inline_copying.
3219 The call to resume_temporary_allocation near the end of this function
3220 goes back to the usual state of affairs. This must be done after
3221 we've built up any unwinders for exception handling, and done
3222 the FINALIZE_PIC work, if necessary. */
3224 rtl_in_current_obstack ();
3226 insns = get_insns ();
3228 /* Copy any shared structure that should not be shared. */
3230 unshare_all_rtl (insns);
3232 /* Instantiate all virtual registers. */
3234 instantiate_virtual_regs (current_function_decl, get_insns ());
3236 /* See if we have allocated stack slots that are not directly addressable.
3237 If so, scan all the insns and create explicit address computation
3238 for all references to such slots. */
3239 /* fixup_stack_slots (); */
3241 /* Find all the EH handlers. */
3242 find_exception_handler_labels ();
3244 /* Always do one jump optimization pass to ensure that JUMP_LABEL fields
3245 are initialized and to compute whether control can drop off the end
3247 TIMEVAR (jump_time, reg_scan (insns, max_reg_num (), 0));
3248 TIMEVAR (jump_time, jump_optimize (insns, 0, 0, 1));
3250 /* Now is when we stop if -fsyntax-only and -Wreturn-type. */
3251 if (rtl_dump_and_exit || flag_syntax_only || DECL_DEFER_OUTPUT (decl))
3252 goto exit_rest_of_compilation;
3254 /* Dump rtl code after jump, if we are doing that. */
3259 fprintf (jump_opt_dump_file, "\n;; Function %s\n\n",
3260 (*decl_printable_name) (decl, 2));
3261 print_rtl (jump_opt_dump_file, insns);
3262 fflush (jump_opt_dump_file);
3265 /* Perform common subexpression elimination.
3266 Nonzero value from `cse_main' means that jumps were simplified
3267 and some code may now be unreachable, so do
3268 jump optimization again. */
3273 fprintf (cse_dump_file, "\n;; Function %s\n\n",
3274 (*decl_printable_name) (decl, 2));
3279 TIMEVAR (cse_time, reg_scan (insns, max_reg_num (), 1));
3281 if (flag_thread_jumps)
3282 /* Hacks by tiemann & kenner. */
3283 TIMEVAR (jump_time, thread_jumps (insns, max_reg_num (), 1));
3285 TIMEVAR (cse_time, tem = cse_main (insns, max_reg_num (),
3287 TIMEVAR (cse_time, delete_dead_from_cse (insns, max_reg_num ()));
3289 if (tem || optimize > 1)
3290 TIMEVAR (jump_time, jump_optimize (insns, 0, 0, 0));
3293 /* Dump rtl code after cse, if we are doing that. */
3298 print_rtl (cse_dump_file, insns);
3299 fflush (cse_dump_file);
3302 purge_addressof (insns);
3303 reg_scan (insns, max_reg_num (), 1);
3308 fprintf (addressof_dump_file, "\n;; Function %s\n\n",
3309 (*decl_printable_name) (decl, 2));
3310 print_rtl (addressof_dump_file, insns);
3311 fflush (addressof_dump_file);
3317 fprintf (loop_dump_file, "\n;; Function %s\n\n",
3318 (*decl_printable_name) (decl, 2));
3321 /* Move constant computations out of loops. */
3327 if (flag_rerun_loop_opt)
3329 /* We only want to perform unrolling once. */
3331 loop_optimize (insns, loop_dump_file, 0);
3333 /* The regscan pass may not be necessary, but let's
3334 be safe until we can prove otherwise. */
3335 reg_scan (insns, max_reg_num (), 1);
3337 loop_optimize (insns, loop_dump_file, flag_unroll_loops);
3341 /* Dump rtl code after loop opt, if we are doing that. */
3346 print_rtl (loop_dump_file, insns);
3347 fflush (loop_dump_file);
3353 fprintf (cse2_dump_file, "\n;; Function %s\n\n",
3354 (*decl_printable_name) (decl, 2));
3357 if (optimize > 0 && flag_rerun_cse_after_loop)
3359 /* Running another jump optimization pass before the second
3360 cse pass sometimes simplifies the RTL enough to allow
3361 the second CSE pass to do a better job. Jump_optimize can change
3362 max_reg_num so we must rerun reg_scan afterwards.
3363 ??? Rework to not call reg_scan so often. */
3364 TIMEVAR (jump_time, reg_scan (insns, max_reg_num (), 0));
3365 TIMEVAR (jump_time, jump_optimize (insns, 0, 0, 1));
3367 TIMEVAR (cse2_time, reg_scan (insns, max_reg_num (), 0));
3368 TIMEVAR (cse2_time, tem = cse_main (insns, max_reg_num (),
3369 1, cse2_dump_file));
3371 TIMEVAR (jump_time, jump_optimize (insns, 0, 0, 0));
3374 if (optimize > 0 && flag_thread_jumps)
3376 /* This pass of jump threading straightens out code
3377 that was kinked by loop optimization. */
3378 TIMEVAR (jump_time, reg_scan (insns, max_reg_num (), 0));
3379 TIMEVAR (jump_time, thread_jumps (insns, max_reg_num (), 0));
3381 /* Dump rtl code after cse, if we are doing that. */
3386 print_rtl (cse2_dump_file, insns);
3387 fflush (cse2_dump_file);
3390 if (branch_prob_dump)
3393 fprintf (branch_prob_dump_file, "\n;; Function %s\n\n",
3394 (*decl_printable_name) (decl, 2));
3397 if (profile_arc_flag || flag_test_coverage || flag_branch_probabilities)
3398 TIMEVAR (branch_prob_time,
3400 branch_prob (insns, branch_prob_dump_file);
3403 if (branch_prob_dump)
3406 print_rtl (branch_prob_dump_file, insns);
3407 fflush (branch_prob_dump_file);
3409 /* We are no longer anticipating cse in this function, at least. */
3411 cse_not_expected = 1;
3413 /* Now we choose between stupid (pcc-like) register allocation
3414 (if we got the -noreg switch and not -opt)
3415 and smart register allocation. */
3417 if (optimize > 0) /* Stupid allocation probably won't work */
3418 obey_regdecls = 0; /* if optimizations being done. */
3422 /* Print function header into flow dump now
3423 because doing the flow analysis makes some of the dump. */
3428 fprintf (flow_dump_file, "\n;; Function %s\n\n",
3429 (*decl_printable_name) (decl, 2));
3436 regclass (insns, max_reg_num ());
3437 stupid_life_analysis (insns, max_reg_num (),
3443 /* Do control and data flow analysis,
3444 and write some of the results to dump file. */
3446 TIMEVAR (flow_time, flow_analysis (insns, max_reg_num (),
3448 if (warn_uninitialized)
3450 uninitialized_vars_warning (DECL_INITIAL (decl));
3451 setjmp_args_warning ();
3455 /* Dump rtl after flow analysis. */
3460 print_rtl_with_bb (flow_dump_file, insns);
3461 fflush (flow_dump_file);
3464 /* If -opt, try combining insns through substitution. */
3467 TIMEVAR (combine_time, combine_instructions (insns, max_reg_num ()));
3469 /* Dump rtl code after insn combination. */
3474 fprintf (combine_dump_file, "\n;; Function %s\n\n",
3475 (*decl_printable_name) (decl, 2));
3476 dump_combine_stats (combine_dump_file);
3477 print_rtl_with_bb (combine_dump_file, insns);
3478 fflush (combine_dump_file);
3484 fprintf (regmove_dump_file, "\n;; Function %s\n\n",
3485 (*decl_printable_name) (decl, 2));
3488 /* Register allocation pre-pass, to reduce number of moves
3489 necessary for two-address machines. */
3490 if (optimize > 0 && flag_regmove)
3491 TIMEVAR (regmove_time, regmove_optimize (insns, max_reg_num (),
3492 regmove_dump_file));
3497 print_rtl_with_bb (regmove_dump_file, insns);
3498 fflush (regmove_dump_file);
3501 /* Print function header into sched dump now
3502 because doing the sched analysis makes some of the dump. */
3507 fprintf (sched_dump_file, "\n;; Function %s\n\n",
3508 (*decl_printable_name) (decl, 2));
3511 if (optimize > 0 && flag_schedule_insns)
3513 /* Do control and data sched analysis,
3514 and write some of the results to dump file. */
3516 TIMEVAR (sched_time, schedule_insns (sched_dump_file));
3519 /* Dump rtl after instruction scheduling. */
3524 print_rtl_with_bb (sched_dump_file, insns);
3525 fflush (sched_dump_file);
3528 /* Unless we did stupid register allocation,
3529 allocate pseudo-regs that are used only within 1 basic block. */
3532 TIMEVAR (local_alloc_time,
3534 regclass (insns, max_reg_num ());
3538 /* Dump rtl code after allocating regs within basic blocks. */
3543 fprintf (local_reg_dump_file, "\n;; Function %s\n\n",
3544 (*decl_printable_name) (decl, 2));
3545 dump_flow_info (local_reg_dump_file);
3546 dump_local_alloc (local_reg_dump_file);
3547 print_rtl_with_bb (local_reg_dump_file, insns);
3548 fflush (local_reg_dump_file);
3551 if (global_reg_dump)
3553 fprintf (global_reg_dump_file, "\n;; Function %s\n\n",
3554 (*decl_printable_name) (decl, 2)));
3556 /* Save the last label number used so far, so reorg can tell
3557 when it's safe to kill spill regs. */
3558 max_label_num_after_reload = max_label_num ();
3560 /* Unless we did stupid register allocation,
3561 allocate remaining pseudo-regs, then do the reload pass
3562 fixing up any insns that are invalid. */
3564 TIMEVAR (global_alloc_time,
3567 failure = global_alloc (global_reg_dump_file);
3569 failure = reload (insns, 0, global_reg_dump_file);
3572 if (global_reg_dump)
3575 dump_global_regs (global_reg_dump_file);
3576 print_rtl_with_bb (global_reg_dump_file, insns);
3577 fflush (global_reg_dump_file);
3581 goto exit_rest_of_compilation;
3583 reload_completed = 1;
3585 /* Do a very simple CSE pass over just the hard registers. */
3587 reload_cse_regs (insns);
3589 /* On some machines, the prologue and epilogue code, or parts thereof,
3590 can be represented as RTL. Doing so lets us schedule insns between
3591 it and the rest of the code and also allows delayed branch
3592 scheduling to operate in the epilogue. */
3594 thread_prologue_and_epilogue_insns (insns);
3596 if (optimize > 0 && flag_schedule_insns_after_reload)
3601 fprintf (sched2_dump_file, "\n;; Function %s\n\n",
3602 (*decl_printable_name) (decl, 2));
3605 /* Do control and data sched analysis again,
3606 and write some more of the results to dump file. */
3608 TIMEVAR (sched2_time, schedule_insns (sched2_dump_file));
3610 /* Dump rtl after post-reorder instruction scheduling. */
3615 print_rtl_with_bb (sched2_dump_file, insns);
3616 fflush (sched2_dump_file);
3620 #ifdef LEAF_REGISTERS
3622 if (optimize > 0 && only_leaf_regs_used () && leaf_function_p ())
3626 /* One more attempt to remove jumps to .+1
3627 left by dead-store-elimination.
3628 Also do cross-jumping this time
3629 and delete no-op move insns. */
3633 TIMEVAR (jump_time, jump_optimize (insns, 1, 1, 0));
3636 /* Dump rtl code after jump, if we are doing that. */
3641 fprintf (jump2_opt_dump_file, "\n;; Function %s\n\n",
3642 (*decl_printable_name) (decl, 2));
3643 print_rtl_with_bb (jump2_opt_dump_file, insns);
3644 fflush (jump2_opt_dump_file);
3647 /* If a machine dependent reorganization is needed, call it. */
3648 #ifdef MACHINE_DEPENDENT_REORG
3649 MACHINE_DEPENDENT_REORG (insns);
3652 /* If a scheduling pass for delayed branches is to be done,
3653 call the scheduling code. */
3656 if (optimize > 0 && flag_delayed_branch)
3658 TIMEVAR (dbr_sched_time, dbr_schedule (insns, dbr_sched_dump_file));
3663 fprintf (dbr_sched_dump_file, "\n;; Function %s\n\n",
3664 (*decl_printable_name) (decl, 2));
3665 print_rtl_with_bb (dbr_sched_dump_file, insns);
3666 fflush (dbr_sched_dump_file);
3672 /* Shorten branches. */
3673 TIMEVAR (shorten_branch_time,
3675 shorten_branches (get_insns ());
3679 TIMEVAR (stack_reg_time, reg_to_stack (insns, stack_reg_dump_file));
3684 fprintf (stack_reg_dump_file, "\n;; Function %s\n\n",
3685 (*decl_printable_name) (decl, 2));
3686 print_rtl_with_bb (stack_reg_dump_file, insns);
3687 fflush (stack_reg_dump_file);
3692 /* Now turn the rtl into assembler code. */
3694 TIMEVAR (final_time,
3699 /* Get the function's name, as described by its RTL.
3700 This may be different from the DECL_NAME name used
3701 in the source file. */
3703 x = DECL_RTL (decl);
3704 if (GET_CODE (x) != MEM)
3707 if (GET_CODE (x) != SYMBOL_REF)
3709 fnname = XSTR (x, 0);
3711 assemble_start_function (decl, fnname);
3712 final_start_function (insns, asm_out_file, optimize);
3713 final (insns, asm_out_file, optimize, 0);
3714 final_end_function (insns, asm_out_file, optimize);
3715 assemble_end_function (decl, fnname);
3716 fflush (asm_out_file);
3718 /* Release all memory held by regsets now */
3719 regset_release_memory ();
3722 /* Write DBX symbols if requested */
3724 /* Note that for those inline functions where we don't initially
3725 know for certain that we will be generating an out-of-line copy,
3726 the first invocation of this routine (rest_of_compilation) will
3727 skip over this code by doing a `goto exit_rest_of_compilation;'.
3728 Later on, finish_compilation will call rest_of_compilation again
3729 for those inline functions that need to have out-of-line copies
3730 generated. During that call, we *will* be routed past here. */
3732 #ifdef DBX_DEBUGGING_INFO
3733 if (write_symbols == DBX_DEBUG)
3734 TIMEVAR (symout_time, dbxout_function (decl));
3737 #ifdef DWARF_DEBUGGING_INFO
3738 if (write_symbols == DWARF_DEBUG)
3739 TIMEVAR (symout_time, dwarfout_file_scope_decl (decl, 0));
3742 #ifdef DWARF2_DEBUGGING_INFO
3743 if (write_symbols == DWARF2_DEBUG)
3744 TIMEVAR (symout_time, dwarf2out_decl (decl));
3747 exit_rest_of_compilation:
3749 /* In case the function was not output,
3750 don't leave any temporary anonymous types
3751 queued up for sdb output. */
3752 #ifdef SDB_DEBUGGING_INFO
3753 if (write_symbols == SDB_DEBUG)
3754 sdbout_types (NULL_TREE);
3757 /* Put back the tree of subblocks and list of arguments
3758 from before we copied them.
3759 Code generation and the output of debugging info may have modified
3760 the copy, but the original is unchanged. */
3762 if (saved_block_tree != 0)
3764 DECL_INITIAL (decl) = saved_block_tree;
3765 DECL_ARGUMENTS (decl) = saved_arguments;
3766 DECL_ABSTRACT_ORIGIN (decl) = NULL_TREE;
3769 reload_completed = 0;
3771 /* Clear out the insn_length contents now that they are no longer valid. */
3772 init_insn_lengths ();
3774 /* Clear out the real_constant_chain before some of the rtx's
3775 it runs through become garbage. */
3777 clear_const_double_mem ();
3779 /* Cancel the effect of rtl_in_current_obstack. */
3781 resume_temporary_allocation ();
3783 /* Show no temporary slots allocated. */
3787 /* The parsing time is all the time spent in yyparse
3788 *except* what is spent in this function. */
3790 parse_time -= get_run_time () - start_time;
3793 /* Entry point of cc1/c++. Decode command args, then call compile_file.
3794 Exit code is 35 if can't open files, 34 if fatal error,
3795 33 if had nonfatal errors, else success. */
3798 main (argc, argv, envp)
3805 int flag_print_mem = 0;
3806 int version_flag = 0;
3809 /* save in case md file wants to emit args as a comment. */
3813 p = argv[0] + strlen (argv[0]);
3814 while (p != argv[0] && p[-1] != '/'
3815 #ifdef DIR_SEPARATOR
3816 && p[-1] != DIR_SEPARATOR
3823 /* Get rid of any avoidable limit on stack size. */
3827 /* Set the stack limit huge so that alloca does not fail. */
3828 getrlimit (RLIMIT_STACK, &rlim);
3829 rlim.rlim_cur = rlim.rlim_max;
3830 setrlimit (RLIMIT_STACK, &rlim);
3832 #endif /* RLIMIT_STACK */
3834 signal (SIGFPE, float_signal);
3837 signal (SIGPIPE, pipe_closed);
3840 decl_printable_name = decl_name;
3841 lang_expand_expr = (struct rtx_def *(*)()) do_abort;
3843 /* Initialize whether `char' is signed. */
3844 flag_signed_char = DEFAULT_SIGNED_CHAR;
3845 #ifdef DEFAULT_SHORT_ENUMS
3846 /* Initialize how much space enums occupy, by default. */
3847 flag_short_enums = DEFAULT_SHORT_ENUMS;
3850 /* Scan to see what optimization level has been specified. That will
3851 determine the default value of many flags. */
3852 for (i = 1; i < argc; i++)
3854 if (!strcmp (argv[i], "-O"))
3858 else if (argv[i][0] == '-' && argv[i][1] == 'O')
3860 /* Handle -O2, -O3, -O69, ... */
3861 char *p = &argv[i][2];
3865 if (! (c >= '0' && c <= '9'))
3868 optimize = atoi (&argv[i][2]);
3872 obey_regdecls = (optimize == 0);
3877 flag_thread_jumps = 1;
3879 flag_delayed_branch = 1;
3881 #ifdef CAN_DEBUG_WITHOUT_FP
3882 flag_omit_frame_pointer = 1;
3884 flag_alias_check = 1;
3889 flag_cse_follow_jumps = 1;
3890 flag_cse_skip_blocks = 1;
3891 flag_expensive_optimizations = 1;
3892 flag_strength_reduce = 1;
3893 flag_rerun_cse_after_loop = 1;
3894 flag_rerun_loop_opt = 1;
3895 flag_caller_saves = 1;
3897 #ifdef INSN_SCHEDULING
3898 flag_schedule_insns = 1;
3899 flag_schedule_insns_after_reload = 1;
3906 flag_inline_functions = 1;
3909 /* Initialize target_flags before OPTIMIZATION_OPTIONS so the latter can
3912 set_target_switch ("");
3914 #ifdef OPTIMIZATION_OPTIONS
3915 /* Allow default optimizations to be specified on a per-machine basis. */
3916 OPTIMIZATION_OPTIONS (optimize);
3919 /* Initialize register usage now so switches may override. */
3922 for (i = 1; i < argc; i++)
3925 /* If this is a language-specific option,
3926 decode it in a language-specific way. */
3927 for (j = 0; lang_options[j] != 0; j++)
3928 if (!strncmp (argv[i], lang_options[j],
3929 strlen (lang_options[j])))
3931 if (lang_options[j] != 0)
3932 /* If the option is valid for *some* language,
3933 treat it as valid even if this language doesn't understand it. */
3934 lang_decode_option (argv[i]);
3935 else if (argv[i][0] == '-' && argv[i][1] != 0)
3937 register char *str = argv[i] + 1;
3942 set_target_switch (&str[1]);
3943 else if (!strcmp (str, "dumpbase"))
3945 dump_base_name = argv[++i];
3947 else if (str[0] == 'd')
3949 register char *p = &str[1];
3954 branch_prob_dump = 1;
3958 global_reg_dump = 1;
3966 cse_dump = 1, cse2_dump = 1;
3972 branch_prob_dump = 1;
3987 global_reg_dump = 1;
4008 flag_print_asm_name = 1;
4032 rtl_dump_and_exit = 1;
4039 else if (str[0] == 'f')
4041 register char *p = &str[1];
4044 /* Some kind of -f option.
4045 P's value is the option sans `-f'.
4046 Search for it in the table of options. */
4049 !found && j < sizeof (f_options) / sizeof (f_options[0]);
4052 if (!strcmp (p, f_options[j].string))
4054 *f_options[j].variable = f_options[j].on_value;
4055 /* A goto here would be cleaner,
4056 but breaks the vax pcc. */
4059 if (p[0] == 'n' && p[1] == 'o' && p[2] == '-'
4060 && ! strcmp (p+3, f_options[j].string))
4062 *f_options[j].variable = ! f_options[j].on_value;
4070 #ifdef INSN_SCHEDULING
4071 else if (!strncmp (p, "sched-verbose-",14))
4072 fix_sched_param("verbose",&p[14]);
4073 else if (!strncmp (p, "sched-max-",10))
4074 fix_sched_param("max",&p[10]);
4075 else if (!strncmp (p, "sched-inter-max-b-",18))
4076 fix_sched_param("interblock-max-blocks",&p[18]);
4077 else if (!strncmp (p, "sched-inter-max-i-",18))
4078 fix_sched_param("interblock-max-insns",&p[18]);
4081 else if (!strncmp (p, "fixed-", 6))
4082 fix_register (&p[6], 1, 1);
4083 else if (!strncmp (p, "call-used-", 10))
4084 fix_register (&p[10], 0, 1);
4085 else if (!strncmp (p, "call-saved-", 11))
4086 fix_register (&p[11], 0, 0);
4088 error ("Invalid option `%s'", argv[i]);
4090 else if (str[0] == 'O')
4092 register char *p = str+1;
4093 while (*p && *p >= '0' && *p <= '9')
4098 error ("Invalid option `%s'", argv[i]);
4100 else if (!strcmp (str, "pedantic"))
4102 else if (!strcmp (str, "pedantic-errors"))
4103 flag_pedantic_errors = pedantic = 1;
4104 else if (!strcmp (str, "quiet"))
4106 else if (!strcmp (str, "version"))
4108 else if (!strcmp (str, "w"))
4109 inhibit_warnings = 1;
4110 else if (!strcmp (str, "W"))
4113 /* We save the value of warn_uninitialized, since if they put
4114 -Wuninitialized on the command line, we need to generate a
4115 warning about not using it without also specifying -O. */
4116 if (warn_uninitialized != 1)
4117 warn_uninitialized = 2;
4119 else if (str[0] == 'W')
4121 register char *p = &str[1];
4124 /* Some kind of -W option.
4125 P's value is the option sans `-W'.
4126 Search for it in the table of options. */
4129 !found && j < sizeof (W_options) / sizeof (W_options[0]);
4132 if (!strcmp (p, W_options[j].string))
4134 *W_options[j].variable = W_options[j].on_value;
4135 /* A goto here would be cleaner,
4136 but breaks the vax pcc. */
4139 if (p[0] == 'n' && p[1] == 'o' && p[2] == '-'
4140 && ! strcmp (p+3, W_options[j].string))
4142 *W_options[j].variable = ! W_options[j].on_value;
4149 else if (!strncmp (p, "id-clash-", 9))
4155 if (*endp >= '0' && *endp <= '9')
4159 error ("Invalid option `%s'", argv[i]);
4164 id_clash_len = atoi (str + 10);
4167 else if (!strncmp (p, "larger-than-", 12))
4169 char *endp = p + 12;
4173 if (*endp >= '0' && *endp <= '9')
4177 error ("Invalid option `%s'", argv[i]);
4178 goto larger_than_lose;
4181 warn_larger_than = 1;
4182 larger_than_size = atoi (str + 13);
4186 error ("Invalid option `%s'", argv[i]);
4188 else if (!strcmp (str, "p"))
4192 else if (!strcmp (str, "a"))
4194 #if !defined (BLOCK_PROFILER) || !defined (FUNCTION_BLOCK_PROFILER)
4195 warning ("`-a' option (basic block profile) not supported");
4197 profile_block_flag = (profile_block_flag < 2) ? 1 : 3;
4200 else if (!strcmp (str, "ax"))
4202 #if !defined (FUNCTION_BLOCK_PROFILER_EXIT) || !defined (BLOCK_PROFILER) || !defined (FUNCTION_BLOCK_PROFILER)
4203 warning ("`-ax' option (jump profiling) not supported");
4205 profile_block_flag = (!profile_block_flag
4206 || profile_block_flag == 2) ? 2 : 3;
4209 else if (str[0] == 'g')
4213 /* A lot of code assumes write_symbols == NO_DEBUG if the
4214 debugging level is 0 (thus -gstabs1 -gstabs0 would lose track
4215 of what debugging type has been selected). This records the
4216 selected type. It is an error to specify more than one
4218 static enum debug_info_type selected_debug_type = NO_DEBUG;
4219 /* Non-zero if debugging format has been explicitly set.
4220 -g and -ggdb don't explicitly set the debugging format so
4221 -gdwarf -g3 is equivalent to -gdwarf3. */
4222 static int type_explicitly_set_p = 0;
4223 /* Table of supported debugging formats. */
4226 /* Since PREFERRED_DEBUGGING_TYPE isn't necessarily a
4227 constant expression, we use NO_DEBUG in its place. */
4228 enum debug_info_type debug_type;
4229 int use_extensions_p;
4230 } *da, debug_args[] = {
4231 { "g", NO_DEBUG, DEFAULT_GDB_EXTENSIONS },
4232 { "ggdb", NO_DEBUG, 1 },
4233 #ifdef DBX_DEBUGGING_INFO
4234 { "gstabs", DBX_DEBUG, 0 },
4235 { "gstabs+", DBX_DEBUG, 1 },
4237 #ifdef DWARF_DEBUGGING_INFO
4238 { "gdwarf", DWARF_DEBUG, 0 },
4239 { "gdwarf+", DWARF_DEBUG, 1 },
4241 #ifdef DWARF2_DEBUGGING_INFO
4242 { "gdwarf-2", DWARF2_DEBUG, 0 },
4244 #ifdef XCOFF_DEBUGGING_INFO
4245 { "gxcoff", XCOFF_DEBUG, 0 },
4246 { "gxcoff+", XCOFF_DEBUG, 1 },
4248 #ifdef SDB_DEBUGGING_INFO
4249 { "gcoff", SDB_DEBUG, 0 },
4253 /* Indexed by enum debug_info_type. */
4254 static char *debug_type_names[] = {
4255 "none", "stabs", "coff", "dwarf-1", "dwarf-2", "xcoff"
4258 /* Look up STR in the table. */
4259 for (da = debug_args; da->arg; da++)
4261 if (! strncmp (str, da->arg, strlen (da->arg)))
4263 enum debug_info_type type = da->debug_type;
4266 p = str + strlen (da->arg);
4267 if (*p && (*p < '0' || *p > '9'))
4271 while (*q && (*q >= '0' && *q <= '9'))
4276 if (len > 1 && !strncmp (str, "gdwarf", len))
4278 error ("use -gdwarf -g%d for DWARF v1, level %d",
4281 error ("use -gdwarf-2 for DWARF v2");
4285 level = 2; /* default debugging info level */
4286 if (*q || level > 3)
4288 warning ("invalid debug level specification in option: `-%s'",
4290 /* ??? This error message is incorrect in the case of
4292 warning ("no debugging information will be generated");
4296 if (type == NO_DEBUG)
4298 type = PREFERRED_DEBUGGING_TYPE;
4299 if (len > 1 && strncmp (str, "ggdb", len) == 0)
4301 #ifdef DWARF2_DEBUGGING_INFO
4302 type = DWARF2_DEBUG;
4304 #ifdef DBX_DEBUGGING_INFO
4311 if (type == NO_DEBUG)
4312 warning ("`-%s' not supported by this configuration of GCC",
4315 /* Does it conflict with an already selected type? */
4316 if (type_explicitly_set_p
4317 /* -g/-ggdb don't conflict with anything */
4318 && da->debug_type != NO_DEBUG
4319 && type != selected_debug_type)
4320 warning ("`-%s' ignored, conflicts with `-g%s'",
4321 str, debug_type_names[(int) selected_debug_type]);
4324 /* If the format has already been set, -g/-ggdb
4325 only change the debug level. */
4326 if (type_explicitly_set_p
4327 && da->debug_type == NO_DEBUG)
4328 ; /* don't change debugging type */
4331 selected_debug_type = type;
4332 type_explicitly_set_p = da->debug_type != NO_DEBUG;
4334 write_symbols = (level == 0
4336 : selected_debug_type);
4337 use_gnu_debug_info_extensions = da->use_extensions_p;
4338 debug_info_level = (enum debug_info_level) level;
4344 warning ("`-%s' not supported by this configuration of GCC",
4347 else if (!strcmp (str, "o"))
4349 asm_file_name = argv[++i];
4351 else if (str[0] == 'G')
4353 g_switch_set = TRUE;
4354 g_switch_value = atoi ((str[1] != '\0') ? str+1 : argv[++i]);
4356 else if (!strncmp (str, "aux-info", 8))
4358 flag_gen_aux_info = 1;
4359 aux_info_file_name = (str[8] != '\0' ? str+8 : argv[++i]);
4362 error ("Invalid option `%s'", argv[i]);
4364 else if (argv[i][0] == '+')
4365 error ("Invalid option `%s'", argv[i]);
4370 /* Checker uses the frame pointer. */
4371 if (flag_check_memory_usage)
4372 flag_omit_frame_pointer = 0;
4374 /* Initialize for bytecode output. A good idea to do this as soon as
4375 possible after the "-f" options have been parsed. */
4376 if (output_bytecode)
4378 #ifndef TARGET_SUPPORTS_BYTECODE
4379 /* Just die with a fatal error if not supported */
4380 fatal ("-fbytecode not supported for this target");
4388 /* Inlining does not work if not optimizing,
4389 so force it not to be done. */
4393 /* The c_decode_option and lang_decode_option functions set
4394 this to `2' if -Wall is used, so we can avoid giving out
4395 lots of errors for people who don't realize what -Wall does. */
4396 if (warn_uninitialized == 1)
4397 warning ("-Wuninitialized is not supported without -O");
4400 #ifdef OVERRIDE_OPTIONS
4401 /* Some machines may reject certain combinations of options. */
4405 if (exceptions_via_longjmp == 2)
4407 #ifdef DWARF2_UNWIND_INFO
4408 exceptions_via_longjmp = ! DWARF2_UNWIND_INFO;
4410 exceptions_via_longjmp = 1;
4414 if (profile_block_flag == 3)
4416 warning ("`-ax' and `-a' are conflicting options. `-a' ignored.");
4417 profile_block_flag = 2;
4420 /* Unrolling all loops implies that standard loop unrolling must also
4422 if (flag_unroll_all_loops)
4423 flag_unroll_loops = 1;
4424 /* Loop unrolling requires that strength_reduction be on also. Silently
4425 turn on strength reduction here if it isn't already on. Also, the loop
4426 unrolling code assumes that cse will be run after loop, so that must
4427 be turned on also. */
4428 if (flag_unroll_loops)
4430 flag_strength_reduce = 1;
4431 flag_rerun_cse_after_loop = 1;
4434 /* Warn about options that are not supported on this machine. */
4435 #ifndef INSN_SCHEDULING
4436 if (flag_schedule_insns || flag_schedule_insns_after_reload)
4437 warning ("instruction scheduling not supported on this target machine");
4440 if (flag_delayed_branch)
4441 warning ("this target machine does not have delayed branches");
4444 /* If we are in verbose mode, write out the version and maybe all the
4445 option flags in use. */
4448 print_version (stderr, "");
4450 print_switch_values (stderr, 0, MAX_LINE, "", " ", "\n");
4453 compile_file (filename);
4455 #if !defined(OS2) && !defined(VMS) && (!defined(_WIN32) || defined (__CYGWIN32__))
4458 char *lim = (char *) sbrk (0);
4460 fprintf (stderr, "Data size %d.\n",
4461 lim - (char *) &environ);
4466 system ("ps -l 1>&2");
4469 #endif /* not USG */
4472 #endif /* ! OS2 && ! VMS && (! _WIN32 || CYGWIN32) */
4475 exit (FATAL_EXIT_CODE);
4477 exit (FATAL_EXIT_CODE);
4478 exit (SUCCESS_EXIT_CODE);
4482 /* Decode -m switches. */
4484 /* Here is a table, controlled by the tm.h file, listing each -m switch
4485 and which bits in `target_switches' it should set or clear.
4486 If VALUE is positive, it is bits to set.
4487 If VALUE is negative, -VALUE is bits to clear.
4488 (The sign bit is not used so there is no confusion.) */
4490 struct {char *name; int value;} target_switches []
4493 /* This table is similar, but allows the switch to have a value. */
4495 #ifdef TARGET_OPTIONS
4496 struct {char *prefix; char ** variable;} target_options []
4500 /* Decode the switch -mNAME. */
4503 set_target_switch (name)
4509 for (j = 0; j < sizeof target_switches / sizeof target_switches[0]; j++)
4510 if (!strcmp (target_switches[j].name, name))
4512 if (target_switches[j].value < 0)
4513 target_flags &= ~-target_switches[j].value;
4515 target_flags |= target_switches[j].value;
4519 #ifdef TARGET_OPTIONS
4521 for (j = 0; j < sizeof target_options / sizeof target_options[0]; j++)
4523 int len = strlen (target_options[j].prefix);
4524 if (!strncmp (target_options[j].prefix, name, len))
4526 *target_options[j].variable = name + len;
4533 error ("Invalid option `%s'", name);
4536 /* Print version information to FILE.
4537 Each line begins with INDENT (for the case where FILE is the
4538 assembler output file). */
4541 print_version (file, indent)
4545 fprintf (file, "%s%s%s version %s", indent, *indent != 0 ? " " : "",
4546 language_string, version_string);
4547 fprintf (file, " (%s)", TARGET_NAME);
4550 #define __VERSION__ "[unknown]"
4552 fprintf (file, " compiled by GNU C version %s.\n", __VERSION__);
4554 fprintf (file, " compiled by CC.\n");
4558 /* Print an option value and return the adjusted position in the line.
4559 ??? We don't handle error returns from fprintf (disk full); presumably
4560 other code will catch a disk full though. */
4563 print_single_switch (file, pos, max, indent, sep, term, type, name)
4566 char *indent, *sep, *term, *type, *name;
4568 /* The ultrix fprintf returns 0 on success, so compute the result we want
4569 here since we need it for the following test. */
4570 int len = strlen (sep) + strlen (type) + strlen (name);
4575 fprintf (file, "%s", term);
4580 fprintf (file, "%s", indent);
4581 pos = strlen (indent);
4583 fprintf (file, "%s%s%s", sep, type, name);
4588 /* Print active target switches to FILE.
4589 POS is the current cursor position and MAX is the size of a "line".
4590 Each line begins with INDENT and ends with TERM.
4591 Each switch is separated from the next by SEP. */
4594 print_switch_values (file, pos, max, indent, sep, term)
4597 char *indent, *sep, *term;
4602 /* Print the options as passed. */
4604 pos = print_single_switch (file, pos, max, indent, *indent ? " " : "", term,
4605 "options passed: ", "");
4607 for (p = &save_argv[1]; *p != NULL; p++)
4611 if (strcmp (*p, "-o") == 0)
4617 if (strcmp (*p, "-quiet") == 0)
4619 if (strcmp (*p, "-version") == 0)
4624 pos = print_single_switch (file, pos, max, indent, sep, term, *p, "");
4627 fprintf (file, "%s", term);
4629 /* Print the -f and -m options that have been enabled.
4630 We don't handle language specific options but printing argv
4633 pos = print_single_switch (file, 0, max, indent, *indent ? " " : "", term,
4634 "options enabled: ", "");
4636 for (j = 0; j < sizeof f_options / sizeof f_options[0]; j++)
4637 if (*f_options[j].variable == f_options[j].on_value)
4638 pos = print_single_switch (file, pos, max, indent, sep, term,
4639 "-f", f_options[j].string);
4641 /* Print target specific options. */
4643 flags = target_flags;
4644 for (j = 0; j < sizeof target_switches / sizeof target_switches[0]; j++)
4645 if (target_switches[j].name[0] != '\0'
4646 && target_switches[j].value > 0
4647 && ((target_switches[j].value & target_flags)
4648 == target_switches[j].value))
4650 pos = print_single_switch (file, pos, max, indent, sep, term,
4651 "-m", target_switches[j].name);
4652 flags &= ~ target_switches[j].value;
4655 #ifdef TARGET_OPTIONS
4656 for (j = 0; j < sizeof target_options / sizeof target_options[0]; j++)
4657 if (*target_options[j].variable != NULL)
4660 sprintf (prefix, "-m%s", target_options[j].prefix);
4661 pos = print_single_switch (file, pos, max, indent, sep, term,
4662 prefix, *target_options[j].variable);
4666 fprintf (file, "%s", term);
4669 /* Record the beginning of a new source file, named FILENAME. */
4672 debug_start_source_file (filename)
4673 register char *filename;
4675 #ifdef DBX_DEBUGGING_INFO
4676 if (write_symbols == DBX_DEBUG)
4677 dbxout_start_new_source_file (filename);
4679 #ifdef DWARF_DEBUGGING_INFO
4680 if (debug_info_level == DINFO_LEVEL_VERBOSE
4681 && write_symbols == DWARF_DEBUG)
4682 dwarfout_start_new_source_file (filename);
4683 #endif /* DWARF_DEBUGGING_INFO */
4684 #ifdef DWARF2_DEBUGGING_INFO
4685 if (debug_info_level == DINFO_LEVEL_VERBOSE
4686 && write_symbols == DWARF2_DEBUG)
4687 dwarf2out_start_source_file (filename);
4688 #endif /* DWARF2_DEBUGGING_INFO */
4689 #ifdef SDB_DEBUGGING_INFO
4690 if (write_symbols == SDB_DEBUG)
4691 sdbout_start_new_source_file (filename);
4695 /* Record the resumption of a source file. LINENO is the line number in
4696 the source file we are returning to. */
4699 debug_end_source_file (lineno)
4700 register unsigned lineno;
4702 #ifdef DBX_DEBUGGING_INFO
4703 if (write_symbols == DBX_DEBUG)
4704 dbxout_resume_previous_source_file ();
4706 #ifdef DWARF_DEBUGGING_INFO
4707 if (debug_info_level == DINFO_LEVEL_VERBOSE
4708 && write_symbols == DWARF_DEBUG)
4709 dwarfout_resume_previous_source_file (lineno);
4710 #endif /* DWARF_DEBUGGING_INFO */
4711 #ifdef DWARF2_DEBUGGING_INFO
4712 if (debug_info_level == DINFO_LEVEL_VERBOSE
4713 && write_symbols == DWARF2_DEBUG)
4714 dwarf2out_end_source_file ();
4715 #endif /* DWARF2_DEBUGGING_INFO */
4716 #ifdef SDB_DEBUGGING_INFO
4717 if (write_symbols == SDB_DEBUG)
4718 sdbout_resume_previous_source_file ();
4722 /* Called from check_newline in c-parse.y. The `buffer' parameter contains
4723 the tail part of the directive line, i.e. the part which is past the
4724 initial whitespace, #, whitespace, directive-name, whitespace part. */
4727 debug_define (lineno, buffer)
4728 register unsigned lineno;
4729 register char *buffer;
4731 #ifdef DWARF_DEBUGGING_INFO
4732 if (debug_info_level == DINFO_LEVEL_VERBOSE
4733 && write_symbols == DWARF_DEBUG)
4734 dwarfout_define (lineno, buffer);
4735 #endif /* DWARF_DEBUGGING_INFO */
4736 #ifdef DWARF2_DEBUGGING_INFO
4737 if (debug_info_level == DINFO_LEVEL_VERBOSE
4738 && write_symbols == DWARF2_DEBUG)
4739 dwarf2out_define (lineno, buffer);
4740 #endif /* DWARF2_DEBUGGING_INFO */
4743 /* Called from check_newline in c-parse.y. The `buffer' parameter contains
4744 the tail part of the directive line, i.e. the part which is past the
4745 initial whitespace, #, whitespace, directive-name, whitespace part. */
4748 debug_undef (lineno, buffer)
4749 register unsigned lineno;
4750 register char *buffer;
4752 #ifdef DWARF_DEBUGGING_INFO
4753 if (debug_info_level == DINFO_LEVEL_VERBOSE
4754 && write_symbols == DWARF_DEBUG)
4755 dwarfout_undef (lineno, buffer);
4756 #endif /* DWARF_DEBUGGING_INFO */
4757 #ifdef DWARF2_DEBUGGING_INFO
4758 if (debug_info_level == DINFO_LEVEL_VERBOSE
4759 && write_symbols == DWARF2_DEBUG)
4760 dwarf2out_undef (lineno, buffer);
4761 #endif /* DWARF2_DEBUGGING_INFO */