1 /* Top level of GNU C compiler
2 Copyright (C) 1987, 88, 89, 92-6, 1997 Free Software Foundation, Inc.
4 This file is part of GNU CC.
6 GNU CC is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2, or (at your option)
11 GNU CC is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with GNU CC; see the file COPYING. If not, write to
18 the Free Software Foundation, 59 Temple Place - Suite 330,
19 Boston, MA 02111-1307, USA. */
21 /* This is the top level of cc1/c++.
22 It parses command args, opens files, invokes the various passes
23 in the proper order, and counts the time used by each.
24 Error messages and low-level interface to malloc also handled here. */
35 #include <sys/types.h>
42 #include <sys/param.h>
43 /* This is for hpux. It is a real screw. They should change hpux. */
45 #include <sys/times.h>
46 #include <time.h> /* Correct for hpux at least. Is it good on other USG? */
47 #undef FFS /* Some systems define this in param.h. */
51 #include <sys/resource.h>
60 #include "insn-attr.h"
67 #ifdef XCOFF_DEBUGGING_INFO
72 /* The extra parameters substantially improve the I/O performance. */
74 vms_fopen (fname, type)
78 /* The <stdio.h> in the gcc-vms-1.42 distribution prototypes fopen with two
79 fixed arguments, which matches ANSI's specification but not VAXCRTL's
80 pre-ANSI implementation. This hack circumvents the mismatch problem. */
81 FILE *(*vmslib_fopen)() = (FILE *(*)()) fopen;
84 return (*vmslib_fopen) (fname, type, "mbc=32",
85 "deq=64", "fop=tef", "shr=nil");
87 return (*vmslib_fopen) (fname, type, "mbc=32");
89 #define fopen vms_fopen
92 #ifndef DEFAULT_GDB_EXTENSIONS
93 #define DEFAULT_GDB_EXTENSIONS 1
96 /* If more than one debugging type is supported, you must define
97 PREFERRED_DEBUGGING_TYPE to choose a format in a system-dependent way.
99 This is one long line cause VAXC can't handle a \-newline. */
100 #if 1 < (defined (DBX_DEBUGGING_INFO) + defined (SDB_DEBUGGING_INFO) + defined (DWARF_DEBUGGING_INFO) + defined (DWARF2_DEBUGGING_INFO) + defined (XCOFF_DEBUGGING_INFO))
101 #ifndef PREFERRED_DEBUGGING_TYPE
102 You Lose! You must define PREFERRED_DEBUGGING_TYPE!
103 #endif /* no PREFERRED_DEBUGGING_TYPE */
104 #else /* Only one debugging format supported. Define PREFERRED_DEBUGGING_TYPE
105 so the following code needn't care. */
106 #ifdef DBX_DEBUGGING_INFO
107 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
109 #ifdef SDB_DEBUGGING_INFO
110 #define PREFERRED_DEBUGGING_TYPE SDB_DEBUG
112 #ifdef DWARF_DEBUGGING_INFO
113 #define PREFERRED_DEBUGGING_TYPE DWARF_DEBUG
115 #ifdef DWARF2_DEBUGGING_INFO
116 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
118 #ifdef XCOFF_DEBUGGING_INFO
119 #define PREFERRED_DEBUGGING_TYPE XCOFF_DEBUG
121 #endif /* More than one debugger format enabled. */
123 /* If still not defined, must have been because no debugging formats
125 #ifndef PREFERRED_DEBUGGING_TYPE
126 #define PREFERRED_DEBUGGING_TYPE NO_DEBUG
129 extern int rtx_equal_function_value_matters;
131 #if ! (defined (VMS) || defined (OS2))
132 extern char **environ;
134 extern char *version_string, *language_string;
136 /* Carry information from ASM_DECLARE_OBJECT_NAME
137 to ASM_FINISH_DECLARE_OBJECT. */
139 extern int size_directive_output;
140 extern tree last_assemble_variable_decl;
142 extern void init_lex ();
143 extern void init_decl_processing ();
144 extern void init_obstacks ();
145 extern void init_tree_codes ();
146 extern void init_rtl ();
147 extern void init_regs ();
148 extern void init_optabs ();
149 extern void init_stmt ();
150 extern void init_reg_sets ();
151 extern void dump_flow_info ();
152 extern void dump_sched_info ();
153 extern void dump_local_alloc ();
154 extern void regset_release_memory ();
156 void rest_of_decl_compilation ();
157 void error_with_file_and_line PVPROTO((char *file, int line, char *s, ...));
158 void error_with_decl PVPROTO((tree decl, char *s, ...));
159 void error_for_asm PVPROTO((rtx insn, char *s, ...));
160 void error PVPROTO((char *s, ...));
161 void fatal PVPROTO((char *s, ...));
162 void warning_with_file_and_line PVPROTO((char *file, int line, char *s, ...));
163 void warning_with_decl PVPROTO((tree decl, char *s, ...));
164 void warning_for_asm PVPROTO((rtx insn, char *s, ...));
165 void warning PVPROTO((char *s, ...));
166 void pedwarn PVPROTO((char *s, ...));
167 void pedwarn_with_decl PVPROTO((tree decl, char *s, ...));
168 void pedwarn_with_file_and_line PVPROTO((char *file, int line, char *s, ...));
169 void sorry PVPROTO((char *s, ...));
170 void really_sorry PVPROTO((char *s, ...));
175 void set_target_switch ();
176 static char *decl_name ();
178 void print_version ();
179 int print_single_switch ();
180 void print_switch_values ();
181 /* Length of line when printing switch values. */
185 extern char *sbrk ();
188 /* Name of program invoked, sans directories. */
192 /* Copy of arguments to main. */
196 /* Name of current original source file (what was input to cpp).
197 This comes from each #-command in the actual input. */
199 char *input_filename;
201 /* Name of top-level original source file (what was input to cpp).
202 This comes from the #-command at the beginning of the actual input.
203 If there isn't any there, then this is the cc1 input file name. */
205 char *main_input_filename;
208 /* Stream for reading from the input file. */
212 /* Current line number in real source file. */
216 /* Stack of currently pending input files. */
218 struct file_stack *input_file_stack;
220 /* Incremented on each change to input_file_stack. */
221 int input_file_stack_tick;
223 /* FUNCTION_DECL for function now being parsed or compiled. */
225 extern tree current_function_decl;
227 /* Name to use as base of names for dump output files. */
229 char *dump_base_name;
231 /* Bit flags that specify the machine subtype we are compiling for.
232 Bits are tested using macros TARGET_... defined in the tm.h file
233 and set by `-m...' switches. Must be defined in rtlanal.c. */
235 extern int target_flags;
237 /* Flags saying which kinds of debugging dump have been requested. */
240 int rtl_dump_and_exit = 0;
241 int jump_opt_dump = 0;
245 int branch_prob_dump = 0;
247 int combine_dump = 0;
248 int regmove_dump = 0;
250 int local_reg_dump = 0;
251 int global_reg_dump = 0;
253 int jump2_opt_dump = 0;
254 int dbr_sched_dump = 0;
255 int flag_print_asm_name = 0;
256 int stack_reg_dump = 0;
258 /* Name for output file of assembly code, specified with -o. */
262 /* Value of the -G xx switch, and whether it was passed or not. */
266 /* Type(s) of debugging information we are producing (if any).
267 See flags.h for the definitions of the different possible
268 types of debugging information. */
269 enum debug_info_type write_symbols = NO_DEBUG;
271 /* Level of debugging information we are producing. See flags.h
272 for the definitions of the different possible levels. */
273 enum debug_info_level debug_info_level = DINFO_LEVEL_NONE;
275 /* Nonzero means use GNU-only extensions in the generated symbolic
276 debugging information. */
277 /* Currently, this only has an effect when write_symbols is set to
278 DBX_DEBUG, XCOFF_DEBUG, or DWARF_DEBUG. */
279 int use_gnu_debug_info_extensions = 0;
281 /* Nonzero means do optimizations. -O.
282 Particular numeric values stand for particular amounts of optimization;
283 thus, -O2 stores 2 here. However, the optimizations beyond the basic
284 ones are not controlled directly by this variable. Instead, they are
285 controlled by individual `flag_...' variables that are defaulted
286 based on this variable. */
290 /* Number of error messages and warning messages so far. */
293 int warningcount = 0;
296 /* Flag to output bytecode instead of native assembler */
297 int output_bytecode = 0;
299 /* Pointer to function to compute the name to use to print a declaration.
300 DECL is the declaration in question.
301 VERBOSITY determines what information will be printed:
302 0: DECL_NAME, demangled as necessary.
303 1: and scope information.
304 2: and any other information that might be interesting, such as function
305 parameter types in C++. */
307 char *(*decl_printable_name) (/* tree decl, int verbosity */);
309 /* Pointer to function to compute rtl for a language-specific tree code. */
311 struct rtx_def *(*lang_expand_expr) ();
313 /* Pointer to function to finish handling an incomplete decl at the
314 end of compilation. */
316 void (*incomplete_decl_finalize_hook) () = 0;
318 /* Highest label number used at the end of reload. */
320 int max_label_num_after_reload;
322 /* Nonzero if generating code to do profiling. */
324 int profile_flag = 0;
326 /* Nonzero if generating code to do profiling on a line-by-line basis. */
328 int profile_block_flag;
330 /* Nonzero if generating code to profile program flow graph arcs. */
332 int profile_arc_flag = 0;
334 /* Nonzero if generating info for gcov to calculate line test coverage. */
336 int flag_test_coverage = 0;
338 /* Nonzero indicates that branch taken probabilities should be calculated. */
340 int flag_branch_probabilities = 0;
342 /* Nonzero for -pedantic switch: warn about anything
343 that standard spec forbids. */
347 /* Temporarily suppress certain warnings.
348 This is set while reading code from a system header file. */
350 int in_system_header = 0;
352 /* Nonzero means do stupid register allocation.
353 Currently, this is 1 if `optimize' is 0. */
355 int obey_regdecls = 0;
357 /* Don't print functions as they are compiled and don't print
358 times taken by the various passes. -quiet. */
364 /* Nonzero means `char' should be signed. */
366 int flag_signed_char;
368 /* Nonzero means give an enum type only as many bytes as it needs. */
370 int flag_short_enums;
372 /* Nonzero for -fcaller-saves: allocate values in regs that need to
373 be saved across function calls, if that produces overall better code.
374 Optional now, so people can test it. */
376 #ifdef DEFAULT_CALLER_SAVES
377 int flag_caller_saves = 1;
379 int flag_caller_saves = 0;
382 /* Nonzero if structures and unions should be returned in memory.
384 This should only be defined if compatibility with another compiler or
385 with an ABI is needed, because it results in slower code. */
387 #ifndef DEFAULT_PCC_STRUCT_RETURN
388 #define DEFAULT_PCC_STRUCT_RETURN 1
391 /* Nonzero for -fpcc-struct-return: return values the same way PCC does. */
393 int flag_pcc_struct_return = DEFAULT_PCC_STRUCT_RETURN;
395 /* Nonzero for -fforce-mem: load memory value into a register
396 before arithmetic on it. This makes better cse but slower compilation. */
398 int flag_force_mem = 0;
400 /* Nonzero for -fforce-addr: load memory address into a register before
401 reference to memory. This makes better cse but slower compilation. */
403 int flag_force_addr = 0;
405 /* Nonzero for -fdefer-pop: don't pop args after each function call;
406 instead save them up to pop many calls' args with one insns. */
408 int flag_defer_pop = 0;
410 /* Nonzero for -ffloat-store: don't allocate floats and doubles
411 in extended-precision registers. */
413 int flag_float_store = 0;
415 /* Nonzero for -fcse-follow-jumps:
416 have cse follow jumps to do a more extensive job. */
418 int flag_cse_follow_jumps;
420 /* Nonzero for -fcse-skip-blocks:
421 have cse follow a branch around a block. */
422 int flag_cse_skip_blocks;
424 /* Nonzero for -fexpensive-optimizations:
425 perform miscellaneous relatively-expensive optimizations. */
426 int flag_expensive_optimizations;
428 /* Nonzero for -fthread-jumps:
429 have jump optimize output of loop. */
431 int flag_thread_jumps;
433 /* Nonzero enables strength-reduction in loop.c. */
435 int flag_strength_reduce = 0;
437 /* Nonzero enables loop unrolling in unroll.c. Only loops for which the
438 number of iterations can be calculated at compile-time (UNROLL_COMPLETELY,
439 UNROLL_MODULO) or at run-time (preconditioned to be UNROLL_MODULO) are
442 int flag_unroll_loops;
444 /* Nonzero enables loop unrolling in unroll.c. All loops are unrolled.
445 This is generally not a win. */
447 int flag_unroll_all_loops;
449 /* Nonzero forces all invariant computations in loops to be moved
452 int flag_move_all_movables = 0;
454 /* Nonzero forces all general induction variables in loops to be
457 int flag_reduce_all_givs = 0;
459 /* Nonzero for -fwritable-strings:
460 store string constants in data segment and don't uniquize them. */
462 int flag_writable_strings = 0;
464 /* Nonzero means don't put addresses of constant functions in registers.
465 Used for compiling the Unix kernel, where strange substitutions are
466 done on the assembly output. */
468 int flag_no_function_cse = 0;
470 /* Nonzero for -fomit-frame-pointer:
471 don't make a frame pointer in simple functions that don't require one. */
473 int flag_omit_frame_pointer = 0;
475 /* Nonzero means place each function into its own section on those platforms
476 which support arbitrary section names and unlimited numbers of sections. */
478 int flag_function_sections = 0;
480 /* Nonzero to inhibit use of define_optimization peephole opts. */
482 int flag_no_peephole = 0;
484 /* Nonzero allows GCC to violate some IEEE or ANSI rules regarding math
485 operations in the interest of optimization. For example it allows
486 GCC to assume arguments to sqrt are nonnegative numbers, allowing
487 faster code for sqrt to be generated. */
489 int flag_fast_math = 0;
491 /* Nonzero means all references through pointers are volatile. */
495 /* Nonzero means treat all global and extern variables as global. */
497 int flag_volatile_global;
499 /* Nonzero means just do syntax checking; don't output anything. */
501 int flag_syntax_only = 0;
503 /* Nonzero means to rerun cse after loop optimization. This increases
504 compilation time about 20% and picks up a few more common expressions. */
506 static int flag_rerun_cse_after_loop;
508 /* Nonzero means to run loop optimizations twice. */
510 static int flag_rerun_loop_opt;
512 /* Nonzero for -finline-functions: ok to inline functions that look like
513 good inline candidates. */
515 int flag_inline_functions;
517 /* Nonzero for -fkeep-inline-functions: even if we make a function
518 go inline everywhere, keep its definition around for debugging
521 int flag_keep_inline_functions;
523 /* Nonzero means that functions will not be inlined. */
527 /* Nonzero means that we should emit static const variables
528 regardless of whether or not optimization is turned on. */
530 int flag_keep_static_consts = 1;
532 /* Nonzero means we should be saving declaration info into a .X file. */
534 int flag_gen_aux_info = 0;
536 /* Specified name of aux-info file. */
538 static char *aux_info_file_name;
540 /* Nonzero means make the text shared if supported. */
542 int flag_shared_data;
544 /* Nonzero means schedule into delayed branch slots if supported. */
546 int flag_delayed_branch;
548 /* Nonzero if we are compiling pure (sharable) code.
549 Value is 1 if we are doing reasonable (i.e. simple
550 offset into offset table) pic. Value is 2 if we can
551 only perform register offsets. */
555 /* Nonzero means generate extra code for exception handling and enable
556 exception handling. */
558 int flag_exceptions = 2;
560 /* Nonzero means don't place uninitialized global data in common storage
565 /* Nonzero means pretend it is OK to examine bits of target floats,
566 even if that isn't true. The resulting code will have incorrect constants,
567 but the same series of instructions that the native compiler would make. */
569 int flag_pretend_float;
571 /* Nonzero means change certain warnings into errors.
572 Usually these are warnings about failure to conform to some standard. */
574 int flag_pedantic_errors = 0;
576 /* flag_schedule_insns means schedule insns within basic blocks (before
578 flag_schedule_insns_after_reload means schedule insns after
581 int flag_schedule_insns = 0;
582 int flag_schedule_insns_after_reload = 0;
585 /* The following flags have effect only for scheduling before register
588 flag_schedule_interblock means schedule insns accross basic blocks.
589 flag_schedule_speculative means allow speculative motion of non-load insns.
590 flag_schedule_speculative_load means allow speculative motion of some
592 flag_schedule_speculative_load_dangerous allows speculative motion of more
594 flag_schedule_reverse_before_reload means try to reverse original order
596 flag_schedule_reverse_after_reload means try to reverse original order
599 int flag_schedule_interblock = 1;
600 int flag_schedule_speculative = 1;
601 int flag_schedule_speculative_load = 0;
602 int flag_schedule_speculative_load_dangerous = 0;
603 int flag_schedule_reverse_before_reload = 0;
604 int flag_schedule_reverse_after_reload = 0;
607 /* flag_on_branch_count_reg means try to replace add-1,compare,branch tupple
608 by a cheaper branch, on a count register. */
609 int flag_branch_on_count_reg;
613 /* -finhibit-size-directive inhibits output of .size for ELF.
614 This is used only for compiling crtstuff.c,
615 and it may be extended to other effects
616 needed for crtstuff.c on other systems. */
617 int flag_inhibit_size_directive = 0;
619 /* -fverbose-asm causes extra commentary information to be produced in
620 the generated assembly code (to make it more readable). This option
621 is generally only of use to those who actually need to read the
622 generated assembly code (perhaps while debugging the compiler itself).
623 -fverbose-asm is the default. -fno-verbose-asm causes the extra information
624 to be omitted and is useful when comparing two assembler files. */
626 int flag_verbose_asm = 1;
628 /* -dA causes debug commentary information to be produced in
629 the generated assembly code (to make it more readable). This option
630 is generally only of use to those who actually need to read the
631 generated assembly code (perhaps while debugging the compiler itself).
632 Currently, this switch is only used by dwarfout.c; however, it is intended
633 to be a catchall for printing debug information in the assembler file. */
635 int flag_debug_asm = 0;
637 /* -fgnu-linker specifies use of the GNU linker for initializations.
638 (Or, more generally, a linker that handles initializations.)
639 -fno-gnu-linker says that collect2 will be used. */
641 int flag_gnu_linker = 0;
643 int flag_gnu_linker = 1;
646 /* Tag all structures with __attribute__(packed) */
647 int flag_pack_struct = 0;
649 /* Emit code to check for stack overflow; also may cause large objects
650 to be allocated dynamically. */
651 int flag_stack_check;
653 /* -fcheck-memory-usage causes extra code to be generated in order to check
654 memory accesses. This is used by a detector of bad memory accesses such
656 int flag_check_memory_usage = 0;
658 /* -fprefix-function-name causes function name to be prefixed. This
659 can be used with -fcheck-memory-usage to isolate code compiled with
660 -fcheck-memory-usage. */
661 int flag_prefix_function_name = 0;
663 int flag_regmove = 0;
665 /* 1 if alias checking is on (by default, when -O). */
666 int flag_alias_check = 0;
668 /* 0 if pointer arguments may alias each other. True in C.
669 1 if pointer arguments may not alias each other but may alias
671 2 if pointer arguments may not alias each other and may not
672 alias global variables. True in Fortran.
673 This defaults to 0 for C. */
674 int flag_argument_noalias = 0;
676 /* Table of language-independent -f options.
677 STRING is the option name. VARIABLE is the address of the variable.
678 ON_VALUE is the value to store in VARIABLE
679 if `-fSTRING' is seen as an option.
680 (If `-fno-STRING' is seen as an option, the opposite value is stored.) */
682 struct { char *string; int *variable; int on_value;} f_options[] =
684 {"float-store", &flag_float_store, 1},
685 {"volatile", &flag_volatile, 1},
686 {"volatile-global", &flag_volatile_global, 1},
687 {"defer-pop", &flag_defer_pop, 1},
688 {"omit-frame-pointer", &flag_omit_frame_pointer, 1},
689 {"cse-follow-jumps", &flag_cse_follow_jumps, 1},
690 {"cse-skip-blocks", &flag_cse_skip_blocks, 1},
691 {"expensive-optimizations", &flag_expensive_optimizations, 1},
692 {"thread-jumps", &flag_thread_jumps, 1},
693 {"strength-reduce", &flag_strength_reduce, 1},
694 {"unroll-loops", &flag_unroll_loops, 1},
695 {"unroll-all-loops", &flag_unroll_all_loops, 1},
696 {"move-all-movables", &flag_move_all_movables, 1},
697 {"reduce-all-givs", &flag_reduce_all_givs, 1},
698 {"writable-strings", &flag_writable_strings, 1},
699 {"peephole", &flag_no_peephole, 0},
700 {"force-mem", &flag_force_mem, 1},
701 {"force-addr", &flag_force_addr, 1},
702 {"function-cse", &flag_no_function_cse, 0},
703 {"inline-functions", &flag_inline_functions, 1},
704 {"keep-inline-functions", &flag_keep_inline_functions, 1},
705 {"inline", &flag_no_inline, 0},
706 {"keep-static-consts", &flag_keep_static_consts, 1},
707 {"syntax-only", &flag_syntax_only, 1},
708 {"shared-data", &flag_shared_data, 1},
709 {"caller-saves", &flag_caller_saves, 1},
710 {"pcc-struct-return", &flag_pcc_struct_return, 1},
711 {"reg-struct-return", &flag_pcc_struct_return, 0},
712 {"delayed-branch", &flag_delayed_branch, 1},
713 {"rerun-cse-after-loop", &flag_rerun_cse_after_loop, 1},
714 {"rerun-loop-opt", &flag_rerun_loop_opt, 1},
715 {"pretend-float", &flag_pretend_float, 1},
716 {"schedule-insns", &flag_schedule_insns, 1},
717 {"schedule-insns2", &flag_schedule_insns_after_reload, 1},
719 {"sched-interblock",&flag_schedule_interblock, 1},
720 {"sched-spec",&flag_schedule_speculative, 1},
721 {"sched-spec-load",&flag_schedule_speculative_load, 1},
722 {"sched-spec-load-dangerous",&flag_schedule_speculative_load_dangerous, 1},
723 {"sched-reverse-S",&flag_schedule_reverse_before_reload, 1},
724 {"sched-reverse-R",&flag_schedule_reverse_after_reload, 1},
725 {"branch-count-reg",&flag_branch_on_count_reg, 1},
727 {"pic", &flag_pic, 1},
728 {"PIC", &flag_pic, 2},
729 {"exceptions", &flag_exceptions, 1},
730 {"sjlj-exceptions", &exceptions_via_longjmp, 1},
731 {"asynchronous-exceptions", &asynchronous_exceptions, 1},
732 {"profile-arcs", &profile_arc_flag, 1},
733 {"test-coverage", &flag_test_coverage, 1},
734 {"branch-probabilities", &flag_branch_probabilities, 1},
735 {"fast-math", &flag_fast_math, 1},
736 {"common", &flag_no_common, 0},
737 {"inhibit-size-directive", &flag_inhibit_size_directive, 1},
738 {"function-sections", &flag_function_sections, 1},
739 {"verbose-asm", &flag_verbose_asm, 1},
740 {"gnu-linker", &flag_gnu_linker, 1},
741 {"regmove", &flag_regmove, 1},
742 {"pack-struct", &flag_pack_struct, 1},
743 {"stack-check", &flag_stack_check, 1},
744 {"bytecode", &output_bytecode, 1},
745 {"alias-check", &flag_alias_check, 1},
746 {"argument-alias", &flag_argument_noalias, 0},
747 {"argument-noalias", &flag_argument_noalias, 1},
748 {"argument-noalias-global", &flag_argument_noalias, 2},
749 {"check-memory-usage", &flag_check_memory_usage, 1},
750 {"prefix-function-name", &flag_prefix_function_name, 1}
753 /* Table of language-specific options. */
755 char *lang_options[] =
758 "-fallow-single-precision",
760 "-fsigned-bitfields",
761 "-funsigned-bitfields",
762 "-fno-signed-bitfields",
763 "-fno-unsigned-bitfields",
767 "-fno-unsigned-char",
783 "-fno-cond-mismatch",
784 "-fdollars-in-identifiers",
785 "-fno-dollars-in-identifiers",
794 "-Wbad-function-cast",
795 "-Wno-bad-function-cast",
799 "-Wno-char-subscripts",
815 "-Wno-missing-braces",
816 "-Wmissing-declarations",
817 "-Wno-missing-declarations",
818 "-Wmissing-prototypes",
819 "-Wno-missing-prototypes",
821 "-Wno-nested-externs",
825 "-Wno-pointer-arith",
827 "-Wno-redundant-decls",
830 "-Wstrict-prototypes",
831 "-Wno-strict-prototypes",
839 "-Wno-write-strings",
841 /* these are for obj c */
857 /* Options controlling warnings */
859 /* Don't print warning messages. -w. */
861 int inhibit_warnings = 0;
863 /* Print various extra warnings. -W. */
865 int extra_warnings = 0;
867 /* Treat warnings as errors. -Werror. */
869 int warnings_are_errors = 0;
871 /* Nonzero to warn about unused local variables. */
875 /* Nonzero to warn about variables used before they are initialized. */
877 int warn_uninitialized;
879 /* Nonzero means warn about all declarations which shadow others. */
883 /* Warn if a switch on an enum fails to have a case for every enum value. */
887 /* Nonzero means warn about function definitions that default the return type
888 or that use a null return and have a return-type other than void. */
890 int warn_return_type;
892 /* Nonzero means warn about pointer casts that increase the required
893 alignment of the target type (and might therefore lead to a crash
894 due to a misaligned access). */
898 /* Nonzero means warn about any identifiers that match in the first N
899 characters. The value N is in `id_clash_len'. */
902 unsigned id_clash_len;
904 /* Nonzero means warn about any objects definitions whose size is larger
905 than N bytes. Also want about function definitions whose returned
906 values are larger than N bytes. The value N is in `larger_than_size'. */
908 int warn_larger_than;
909 unsigned larger_than_size;
911 /* Nonzero means warn if inline function is too large. */
915 /* Warn if a function returns an aggregate,
916 since there are often incompatible calling conventions for doing this. */
918 int warn_aggregate_return;
920 /* Likewise for -W. */
922 struct { char *string; int *variable; int on_value;} W_options[] =
924 {"unused", &warn_unused, 1},
925 {"error", &warnings_are_errors, 1},
926 {"shadow", &warn_shadow, 1},
927 {"switch", &warn_switch, 1},
928 {"aggregate-return", &warn_aggregate_return, 1},
929 {"cast-align", &warn_cast_align, 1},
930 {"uninitialized", &warn_uninitialized, 1},
931 {"inline", &warn_inline, 1}
934 /* Output files for assembler code (real compiler output)
935 and debugging dumps. */
940 FILE *jump_opt_dump_file;
942 FILE *loop_dump_file;
943 FILE *cse2_dump_file;
944 FILE *branch_prob_dump_file;
945 FILE *flow_dump_file;
946 FILE *combine_dump_file;
947 FILE *regmove_dump_file;
948 FILE *sched_dump_file;
949 FILE *local_reg_dump_file;
950 FILE *global_reg_dump_file;
951 FILE *sched2_dump_file;
952 FILE *jump2_opt_dump_file;
953 FILE *dbr_sched_dump_file;
954 FILE *stack_reg_dump_file;
956 /* Time accumulators, to count the total time spent in various passes. */
960 int integration_time;
965 int branch_prob_time;
970 int local_alloc_time;
971 int global_alloc_time;
974 int shorten_branch_time;
980 /* Return time used so far, in microseconds. */
990 struct rusage rusage;
995 int proc_system_time;
997 int child_system_time;
1009 return (clock() * 1000);
1010 #else /* not _WIN32 */
1013 return (tms.tms_utime + tms.tms_stime) * (1000000 / HZ);
1016 getrusage (0, &rusage);
1017 return (rusage.ru_utime.tv_sec * 1000000 + rusage.ru_utime.tv_usec
1018 + rusage.ru_stime.tv_sec * 1000000 + rusage.ru_stime.tv_usec);
1021 return (vms_times.proc_user_time + vms_times.proc_system_time) * 10000;
1027 #define TIMEVAR(VAR, BODY) \
1028 do { int otime = get_run_time (); BODY; VAR += get_run_time () - otime; } while (0)
1031 print_time (str, total)
1036 "time in %s: %d.%06d\n",
1037 str, total / 1000000, total % 1000000);
1040 /* Count an error or warning. Return 1 if the message should be printed. */
1043 count_error (warningp)
1046 if (warningp && inhibit_warnings)
1049 if (warningp && !warnings_are_errors)
1053 static int warning_message = 0;
1055 if (warningp && !warning_message)
1057 fprintf (stderr, "%s: warnings being treated as errors\n", progname);
1058 warning_message = 1;
1066 /* Print a fatal error message. NAME is the text.
1067 Also include a system error message based on `errno'. */
1070 pfatal_with_name (name)
1073 fprintf (stderr, "%s: ", progname);
1075 exit (FATAL_EXIT_CODE);
1079 fatal_io_error (name)
1082 fprintf (stderr, "%s: %s: I/O error\n", progname, name);
1083 exit (FATAL_EXIT_CODE);
1086 /* Called to give a better error message for a bad insn rather than
1087 just calling abort(). */
1090 fatal_insn (message, insn)
1094 if (!output_bytecode)
1100 fflush (asm_out_file);
1102 fflush (aux_info_file);
1104 fflush (rtl_dump_file);
1105 if (jump_opt_dump_file)
1106 fflush (jump_opt_dump_file);
1108 fflush (cse_dump_file);
1110 fflush (loop_dump_file);
1112 fflush (cse2_dump_file);
1114 fflush (flow_dump_file);
1115 if (combine_dump_file)
1116 fflush (combine_dump_file);
1117 if (regmove_dump_file)
1118 fflush (regmove_dump_file);
1119 if (sched_dump_file)
1120 fflush (sched_dump_file);
1121 if (local_reg_dump_file)
1122 fflush (local_reg_dump_file);
1123 if (global_reg_dump_file)
1124 fflush (global_reg_dump_file);
1125 if (sched2_dump_file)
1126 fflush (sched2_dump_file);
1127 if (jump2_opt_dump_file)
1128 fflush (jump2_opt_dump_file);
1129 if (dbr_sched_dump_file)
1130 fflush (dbr_sched_dump_file);
1131 if (stack_reg_dump_file)
1132 fflush (stack_reg_dump_file);
1138 /* Called to give a better error message when we don't have an insn to match
1139 what we are looking for or if the insn's constraints aren't satisfied,
1140 rather than just calling abort(). */
1143 fatal_insn_not_found (insn)
1146 if (INSN_CODE (insn) < 0)
1147 fatal_insn ("internal error--unrecognizable insn:", insn);
1149 fatal_insn ("internal error--insn does not satisfy its constraints:", insn);
1152 /* This is the default decl_printable_name function. */
1155 decl_name (decl, verbosity)
1159 return IDENTIFIER_POINTER (DECL_NAME (decl));
1162 static int need_error_newline;
1164 /* Function of last error message;
1165 more generally, function such that if next error message is in it
1166 then we don't have to mention the function name. */
1167 static tree last_error_function = NULL;
1169 /* Used to detect when input_file_stack has changed since last described. */
1170 static int last_error_tick;
1172 /* Called when the start of a function definition is parsed,
1173 this function prints on stderr the name of the function. */
1176 announce_function (decl)
1181 if (rtl_dump_and_exit)
1182 fprintf (stderr, "%s ", IDENTIFIER_POINTER (DECL_NAME (decl)));
1184 fprintf (stderr, " %s", (*decl_printable_name) (decl, 2));
1186 need_error_newline = 1;
1187 last_error_function = current_function_decl;
1191 /* The default function to print out name of current function that caused
1195 default_print_error_function (file)
1198 if (last_error_function != current_function_decl)
1200 char *kind = "function";
1201 if (current_function_decl != 0
1202 && TREE_CODE (TREE_TYPE (current_function_decl)) == METHOD_TYPE)
1206 fprintf (stderr, "%s: ", file);
1208 if (current_function_decl == NULL)
1209 fprintf (stderr, "At top level:\n");
1212 char *name = (*decl_printable_name) (current_function_decl, 2);
1213 fprintf (stderr, "In %s `%s':\n", kind, name);
1216 last_error_function = current_function_decl;
1220 /* Called by report_error_function to print out function name.
1221 * Default may be overridden by language front-ends. */
1223 void (*print_error_function) PROTO((char *)) = default_print_error_function;
1225 /* Prints out, if necessary, the name of the current function
1226 that caused an error. Called from all error and warning functions. */
1229 report_error_function (file)
1232 struct file_stack *p;
1234 if (need_error_newline)
1236 fprintf (stderr, "\n");
1237 need_error_newline = 0;
1240 (*print_error_function) (file);
1242 if (input_file_stack && input_file_stack->next != 0
1243 && input_file_stack_tick != last_error_tick
1244 && file == input_filename)
1246 fprintf (stderr, "In file included");
1247 for (p = input_file_stack->next; p; p = p->next)
1249 fprintf (stderr, " from %s:%d", p->name, p->line);
1251 fprintf (stderr, ",\n ");
1253 fprintf (stderr, ":\n");
1254 last_error_tick = input_file_stack_tick;
1258 /* Print a message. */
1261 vmessage (prefix, s, ap)
1267 fprintf (stderr, "%s: ", prefix);
1270 vfprintf (stderr, s, ap);
1273 HOST_WIDE_INT v1 = va_arg(ap, HOST_WIDE_INT);
1274 HOST_WIDE_INT v2 = va_arg(ap, HOST_WIDE_INT);
1275 HOST_WIDE_INT v3 = va_arg(ap, HOST_WIDE_INT);
1276 HOST_WIDE_INT v4 = va_arg(ap, HOST_WIDE_INT);
1277 fprintf (stderr, s, v1, v2, v3, v4);
1282 /* Print a message relevant to line LINE of file FILE. */
1285 v_message_with_file_and_line (file, line, prefix, s, ap)
1293 fprintf (stderr, "%s:%d: ", file, line);
1295 fprintf (stderr, "%s: ", progname);
1297 vmessage (prefix, s, ap);
1298 fputc ('\n', stderr);
1301 /* Print a message relevant to the given DECL. */
1304 v_message_with_decl (decl, prefix, s, ap)
1312 fprintf (stderr, "%s:%d: ",
1313 DECL_SOURCE_FILE (decl), DECL_SOURCE_LINE (decl));
1316 fprintf (stderr, "%s: ", prefix);
1318 /* Do magic to get around lack of varargs support for insertion
1319 of arguments into existing list. We know that the decl is first;
1320 we ass_u_me that it will be printed with "%s". */
1322 for (p = s; *p; ++p)
1326 if (*(p + 1) == '%')
1333 if (p > s) /* Print the left-hand substring. */
1335 char fmt[sizeof "%.255s"];
1338 if (width > 255L) width = 255L; /* arbitrary */
1339 sprintf (fmt, "%%.%lds", width);
1340 fprintf (stderr, fmt, s);
1343 if (*p == '%') /* Print the name. */
1345 char *n = (DECL_NAME (decl)
1346 ? (*decl_printable_name) (decl, 2)
1352 if (isalpha (*(p - 1) & 0xFF))
1357 if (*p) /* Print the rest of the message. */
1358 vmessage ((char *)NULL, p, ap);
1360 fputc ('\n', stderr);
1363 /* Figure file and line of the given INSN. */
1366 file_and_line_for_asm (insn, pfile, pline)
1371 rtx body = PATTERN (insn);
1374 /* Find the (or one of the) ASM_OPERANDS in the insn. */
1375 if (GET_CODE (body) == SET && GET_CODE (SET_SRC (body)) == ASM_OPERANDS)
1376 asmop = SET_SRC (body);
1377 else if (GET_CODE (body) == ASM_OPERANDS)
1379 else if (GET_CODE (body) == PARALLEL
1380 && GET_CODE (XVECEXP (body, 0, 0)) == SET)
1381 asmop = SET_SRC (XVECEXP (body, 0, 0));
1382 else if (GET_CODE (body) == PARALLEL
1383 && GET_CODE (XVECEXP (body, 0, 0)) == ASM_OPERANDS)
1384 asmop = XVECEXP (body, 0, 0);
1390 *pfile = ASM_OPERANDS_SOURCE_FILE (asmop);
1391 *pline = ASM_OPERANDS_SOURCE_LINE (asmop);
1395 *pfile = input_filename;
1400 /* Report an error at line LINE of file FILE. */
1403 v_error_with_file_and_line (file, line, s, ap)
1410 report_error_function (file);
1411 v_message_with_file_and_line (file, line, (char *)NULL, s, ap);
1415 error_with_file_and_line VPROTO((char *file, int line, char *s, ...))
1427 file = va_arg (ap, char *);
1428 line = va_arg (ap, int);
1429 s = va_arg (ap, char *);
1432 v_error_with_file_and_line (file, line, s, ap);
1436 /* Report an error at the declaration DECL.
1437 S is a format string which uses %s to substitute the declaration
1438 name; subsequent substitutions are a la printf. */
1441 v_error_with_decl (decl, s, ap)
1447 report_error_function (DECL_SOURCE_FILE (decl));
1448 v_message_with_decl (decl, (char *)NULL, s, ap);
1452 error_with_decl VPROTO((tree decl, char *s, ...))
1463 decl = va_arg (ap, tree);
1464 s = va_arg (ap, char *);
1467 v_error_with_decl (decl, s, ap);
1471 /* Report an error at the line number of the insn INSN.
1472 This is used only when INSN is an `asm' with operands,
1473 and each ASM_OPERANDS records its own source file and line. */
1476 v_error_for_asm (insn, s, ap)
1485 file_and_line_for_asm (insn, &file, &line);
1486 report_error_function (file);
1487 v_message_with_file_and_line (file, line, (char *)NULL, s, ap);
1491 error_for_asm VPROTO((rtx insn, char *s, ...))
1502 insn = va_arg (ap, rtx);
1503 s = va_arg (ap, char *);
1506 v_error_for_asm (insn, s, ap);
1510 /* Report an error at the current line number. */
1517 v_error_with_file_and_line (input_filename, lineno, s, ap);
1521 error VPROTO((char *s, ...))
1531 s = va_arg (ap, char *);
1538 /* Report a fatal error at the current line number. */
1546 exit (FATAL_EXIT_CODE);
1550 fatal VPROTO((char *s, ...))
1560 s = va_arg (ap, char *);
1567 /* Report a warning at line LINE of file FILE. */
1570 v_warning_with_file_and_line (file, line, s, ap)
1576 if (count_error (1))
1578 report_error_function (file);
1579 v_message_with_file_and_line (file, line, "warning", s, ap);
1584 warning_with_file_and_line VPROTO((char *file, int line, char *s, ...))
1596 file = va_arg (ap, char *);
1597 line = va_arg (ap, int);
1598 s = va_arg (ap, char *);
1601 v_warning_with_file_and_line (file, line, s, ap);
1605 /* Report a warning at the declaration DECL.
1606 S is a format string which uses %s to substitute the declaration
1607 name; subsequent substitutions are a la printf. */
1610 v_warning_with_decl (decl, s, ap)
1615 if (count_error (1))
1617 report_error_function (DECL_SOURCE_FILE (decl));
1618 v_message_with_decl (decl, "warning", s, ap);
1623 warning_with_decl VPROTO((tree decl, char *s, ...))
1634 decl = va_arg (ap, tree);
1635 s = va_arg (ap, char *);
1638 v_warning_with_decl (decl, s, ap);
1642 /* Report a warning at the line number of the insn INSN.
1643 This is used only when INSN is an `asm' with operands,
1644 and each ASM_OPERANDS records its own source file and line. */
1647 v_warning_for_asm (insn, s, ap)
1652 if (count_error (1))
1657 file_and_line_for_asm (insn, &file, &line);
1658 report_error_function (file);
1659 v_message_with_file_and_line (file, line, "warning", s, ap);
1664 warning_for_asm VPROTO((rtx insn, char *s, ...))
1675 insn = va_arg (ap, rtx);
1676 s = va_arg (ap, char *);
1679 v_warning_for_asm (insn, s, ap);
1683 /* Report a warning at the current line number. */
1690 v_warning_with_file_and_line (input_filename, lineno, s, ap);
1694 warning VPROTO((char *s, ...))
1704 s = va_arg (ap, char *);
1711 /* These functions issue either warnings or errors depending on
1712 -pedantic-errors. */
1719 if (flag_pedantic_errors)
1726 pedwarn VPROTO((char *s, ...))
1736 s = va_arg (ap, char *);
1744 v_pedwarn_with_decl (decl, s, ap)
1749 /* We don't want -pedantic-errors to cause the compilation to fail from
1750 "errors" in system header files. Sometimes fixincludes can't fix what's
1751 broken (eg: unsigned char bitfields - fixing it may change the alignment
1752 which will cause programs to mysteriously fail because the C library
1753 or kernel uses the original layout). There's no point in issuing a
1754 warning either, it's just unnecessary noise. */
1756 if (! DECL_IN_SYSTEM_HEADER (decl))
1758 if (flag_pedantic_errors)
1759 v_error_with_decl (decl, s, ap);
1761 v_warning_with_decl (decl, s, ap);
1766 pedwarn_with_decl VPROTO((tree decl, char *s, ...))
1777 decl = va_arg (ap, tree);
1778 s = va_arg (ap, char *);
1781 v_pedwarn_with_decl (decl, s, ap);
1786 v_pedwarn_with_file_and_line (file, line, s, ap)
1792 if (flag_pedantic_errors)
1793 v_error_with_file_and_line (file, line, s, ap);
1795 v_warning_with_file_and_line (file, line, s, ap);
1799 pedwarn_with_file_and_line VPROTO((char *file, int line, char *s, ...))
1811 file = va_arg (ap, char *);
1812 line = va_arg (ap, int);
1813 s = va_arg (ap, char *);
1816 v_pedwarn_with_file_and_line (file, line, s, ap);
1820 /* Apologize for not implementing some feature. */
1829 fprintf (stderr, "%s:%d: ", input_filename, lineno);
1831 fprintf (stderr, "%s: ", progname);
1832 vmessage ("sorry, not implemented", s, ap);
1833 fputc ('\n', stderr);
1837 sorry VPROTO((char *s, ...))
1847 s = va_arg (ap, char *);
1854 /* Apologize for not implementing some feature, then quit. */
1857 v_really_sorry (s, ap)
1863 fprintf (stderr, "%s:%d: ", input_filename, lineno);
1865 fprintf (stderr, "%s: ", progname);
1866 vmessage ("sorry, not implemented", s, ap);
1867 fatal (" (fatal)\n");
1871 really_sorry VPROTO((char *s, ...))
1881 s = va_arg (ap, char *);
1884 v_really_sorry (s, ap);
1888 /* More 'friendly' abort that prints the line and file.
1889 config.h can #define abort fancy_abort if you like that sort of thing.
1891 I don't think this is actually a good idea.
1892 Other sorts of crashes will look a certain way.
1893 It is a good thing if crashes from calling abort look the same way.
1899 fatal ("internal gcc abort");
1902 /* This calls abort and is used to avoid problems when abort if a macro.
1903 It is used when we need to pass the address of abort. */
1911 /* When `malloc.c' is compiled with `rcheck' defined,
1912 it calls this function to report clobberage. */
1920 /* Same as `malloc' but report error if no memory available. */
1926 register char *value = (char *) malloc (size);
1927 if (value == 0 && size != 0)
1928 fatal ("virtual memory exhausted");
1932 /* Same as `realloc' but report error if no memory available. */
1935 xrealloc (ptr, size)
1939 char *result = (char *) realloc (ptr, size);
1941 fatal ("virtual memory exhausted");
1945 /* Same as `strdup' but report error if no memory available. */
1951 register char *result = (char *) malloc (strlen (s) + 1);
1954 fatal ("virtual memory exhausted");
1959 /* Return the logarithm of X, base 2, considering X unsigned,
1960 if X is a power of 2. Otherwise, returns -1.
1962 This should be used via the `exact_log2' macro. */
1966 register unsigned HOST_WIDE_INT x;
1968 register int log = 0;
1969 /* Test for 0 or a power of 2. */
1970 if (x == 0 || x != (x & -x))
1972 while ((x >>= 1) != 0)
1977 /* Given X, an unsigned number, return the largest int Y such that 2**Y <= X.
1978 If X is 0, return -1.
1980 This should be used via the floor_log2 macro. */
1984 register unsigned HOST_WIDE_INT x;
1986 register int log = -1;
1993 static int float_handler_set;
1995 jmp_buf float_handler;
1997 /* Signals actually come here. */
2000 float_signal (signo)
2001 /* If this is missing, some compilers complain. */
2004 if (float_handled == 0)
2006 #if defined (USG) || defined (hpux)
2007 signal (SIGFPE, float_signal); /* re-enable the signal catcher */
2010 signal (SIGFPE, float_signal);
2011 longjmp (float_handler, 1);
2014 /* Specify where to longjmp to when a floating arithmetic error happens.
2015 If HANDLER is 0, it means don't handle the errors any more. */
2018 set_float_handler (handler)
2021 float_handled = (handler != 0);
2023 bcopy ((char *) handler, (char *) float_handler, sizeof (float_handler));
2025 if (float_handled && ! float_handler_set)
2027 signal (SIGFPE, float_signal);
2028 float_handler_set = 1;
2032 /* Specify, in HANDLER, where to longjmp to when a floating arithmetic
2033 error happens, pushing the previous specification into OLD_HANDLER.
2034 Return an indication of whether there was a previous handler in effect. */
2037 push_float_handler (handler, old_handler)
2038 jmp_buf handler, old_handler;
2040 int was_handled = float_handled;
2044 bcopy ((char *) float_handler, (char *) old_handler,
2045 sizeof (float_handler));
2047 bcopy ((char *) handler, (char *) float_handler, sizeof (float_handler));
2051 /* Restore the previous specification of whether and where to longjmp to
2052 when a floating arithmetic error happens. */
2055 pop_float_handler (handled, handler)
2059 float_handled = handled;
2061 bcopy ((char *) handler, (char *) float_handler, sizeof (float_handler));
2064 /* Handler for SIGPIPE. */
2068 /* If this is missing, some compilers complain. */
2071 fatal ("output pipe has been closed");
2074 /* Strip off a legitimate source ending from the input string NAME of
2075 length LEN. Rather than having to know the names used by all of
2076 our front ends, we strip off an ending of a period followed by one,
2077 two, or three characters. */
2080 strip_off_ending (name, len)
2084 if (len > 2 && name[len - 2] == '.')
2085 name[len - 2] = '\0';
2086 else if (len > 3 && name[len - 3] == '.')
2087 name[len - 3] = '\0';
2088 else if (len > 4 && name[len - 4] == '.')
2089 name[len - 4] = '\0';
2092 /* Output a quoted string. */
2095 output_quoted_string (asm_file, string)
2101 putc ('\"', asm_file);
2102 while ((c = *string++) != 0)
2104 if (c == '\"' || c == '\\')
2105 putc ('\\', asm_file);
2108 putc ('\"', asm_file);
2111 /* Output a file name in the form wanted by System V. */
2114 output_file_directive (asm_file, input_name)
2118 int len = strlen (input_name);
2119 char *na = input_name + len;
2121 /* NA gets INPUT_NAME sans directory names. */
2122 while (na > input_name)
2129 #ifdef ASM_OUTPUT_MAIN_SOURCE_FILENAME
2130 ASM_OUTPUT_MAIN_SOURCE_FILENAME (asm_file, na);
2132 #ifdef ASM_OUTPUT_SOURCE_FILENAME
2133 ASM_OUTPUT_SOURCE_FILENAME (asm_file, na);
2135 fprintf (asm_file, "\t.file\t");
2136 output_quoted_string (asm_file, na);
2137 fputc ('\n', asm_file);
2142 /* Routine to build language identifier for object file. */
2145 output_lang_identify (asm_out_file)
2148 int len = strlen (lang_identify ()) + sizeof ("__gnu_compiled_") + 1;
2149 char *s = (char *) alloca (len);
2150 sprintf (s, "__gnu_compiled_%s", lang_identify ());
2151 ASM_OUTPUT_LABEL (asm_out_file, s);
2154 /* Routine to open a dump file. */
2157 open_dump_file (base_name, suffix)
2162 char *dumpname = (char *) alloca (strlen (base_name) + strlen (suffix) + 1);
2164 strcpy (dumpname, base_name);
2165 strcat (dumpname, suffix);
2166 f = fopen (dumpname, "w");
2168 pfatal_with_name (dumpname);
2172 /* Compile an entire file of output from cpp, named NAME.
2173 Write a file of assembly output and various debugging dumps. */
2182 int name_specified = name != 0;
2184 if (dump_base_name == 0)
2185 dump_base_name = name ? name : "gccdump";
2189 integration_time = 0;
2194 branch_prob_time = 0;
2199 local_alloc_time = 0;
2200 global_alloc_time = 0;
2203 shorten_branch_time = 0;
2210 /* Open input file. */
2212 if (name == 0 || !strcmp (name, "-"))
2218 finput = fopen (name, "r");
2220 pfatal_with_name (name);
2222 #ifdef IO_BUFFER_SIZE
2223 setvbuf (finput, (char *) xmalloc (IO_BUFFER_SIZE), _IOFBF, IO_BUFFER_SIZE);
2225 #endif /* !USE_CPPLIB */
2227 /* Initialize data in various passes. */
2236 /* Some of these really don't need to be called when generating bytecode,
2237 but the options would have to be parsed first to know that. -bson */
2239 init_emit_once (debug_info_level == DINFO_LEVEL_NORMAL
2240 || debug_info_level == DINFO_LEVEL_VERBOSE
2241 || flag_test_coverage);
2243 init_decl_processing ();
2251 if (flag_caller_saves)
2252 init_caller_save ();
2254 /* If auxiliary info generation is desired, open the output file.
2255 This goes in the same directory as the source file--unlike
2256 all the other output files. */
2257 if (flag_gen_aux_info)
2259 aux_info_file = fopen (aux_info_file_name, "w");
2260 if (aux_info_file == 0)
2261 pfatal_with_name (aux_info_file_name);
2264 /* If rtl dump desired, open the output file. */
2266 rtl_dump_file = open_dump_file (dump_base_name, ".rtl");
2268 /* If jump_opt dump desired, open the output file. */
2270 jump_opt_dump_file = open_dump_file (dump_base_name, ".jump");
2272 /* If cse dump desired, open the output file. */
2274 cse_dump_file = open_dump_file (dump_base_name, ".cse");
2276 /* If loop dump desired, open the output file. */
2278 loop_dump_file = open_dump_file (dump_base_name, ".loop");
2280 /* If cse2 dump desired, open the output file. */
2282 cse2_dump_file = open_dump_file (dump_base_name, ".cse2");
2284 /* If branch_prob dump desired, open the output file. */
2285 if (branch_prob_dump)
2286 branch_prob_dump_file = open_dump_file (dump_base_name, ".bp");
2288 /* If flow dump desired, open the output file. */
2290 flow_dump_file = open_dump_file (dump_base_name, ".flow");
2292 /* If combine dump desired, open the output file. */
2294 combine_dump_file = open_dump_file (dump_base_name, ".combine");
2296 /* If regmove dump desired, open the output file. */
2298 regmove_dump_file = open_dump_file (dump_base_name, ".regmove");
2300 /* If scheduling dump desired, open the output file. */
2302 sched_dump_file = open_dump_file (dump_base_name, ".sched");
2304 /* If local_reg dump desired, open the output file. */
2306 local_reg_dump_file = open_dump_file (dump_base_name, ".lreg");
2308 /* If global_reg dump desired, open the output file. */
2309 if (global_reg_dump)
2310 global_reg_dump_file = open_dump_file (dump_base_name, ".greg");
2312 /* If 2nd scheduling dump desired, open the output file. */
2314 sched2_dump_file = open_dump_file (dump_base_name, ".sched2");
2316 /* If jump2_opt dump desired, open the output file. */
2318 jump2_opt_dump_file = open_dump_file (dump_base_name, ".jump2");
2320 /* If dbr_sched dump desired, open the output file. */
2322 dbr_sched_dump_file = open_dump_file (dump_base_name, ".dbr");
2326 /* If stack_reg dump desired, open the output file. */
2328 stack_reg_dump_file = open_dump_file (dump_base_name, ".stack");
2332 /* Open assembler code output file. */
2334 if (! name_specified && asm_file_name == 0)
2335 asm_out_file = stdout;
2338 int len = strlen (dump_base_name);
2339 register char *dumpname = (char *) xmalloc (len + 6);
2340 strcpy (dumpname, dump_base_name);
2341 strip_off_ending (dumpname, len);
2342 strcat (dumpname, ".s");
2343 if (asm_file_name == 0)
2345 asm_file_name = (char *) xmalloc (strlen (dumpname) + 1);
2346 strcpy (asm_file_name, dumpname);
2348 if (!strcmp (asm_file_name, "-"))
2349 asm_out_file = stdout;
2351 asm_out_file = fopen (asm_file_name, "w");
2352 if (asm_out_file == 0)
2353 pfatal_with_name (asm_file_name);
2356 #ifdef IO_BUFFER_SIZE
2357 setvbuf (asm_out_file, (char *) xmalloc (IO_BUFFER_SIZE),
2358 _IOFBF, IO_BUFFER_SIZE);
2361 input_filename = name;
2363 /* Put an entry on the input file stack for the main input file. */
2365 = (struct file_stack *) xmalloc (sizeof (struct file_stack));
2366 input_file_stack->next = 0;
2367 input_file_stack->name = input_filename;
2369 /* Gross. Gross. lang_init is (I think) the first callback into
2370 the language front end, and is thus the first opportunity to
2371 have the selected language override the default value for any
2374 So the default value for flag_exceptions is 2 (uninitialized).
2375 If we encounter -fno-exceptions or -fexceptions, then flag_exceptions
2376 will be set to zero or one respectively.
2378 flag_exceptions can also be set by lang_init to something other
2379 than the default "uninitialized" value of 2.
2381 After lang_init, if the value is still 2, then we default to
2382 -fno-exceptions (value will be reset to zero).
2384 When our EH mechanism is low enough overhead that we can enable
2385 it by default for languages other than C++, then all this braindamage
2388 /* Perform language-specific initialization.
2389 This may set main_input_filename. */
2392 if (flag_exceptions == 2)
2393 flag_exceptions = 0;
2395 /* If the input doesn't start with a #line, use the input name
2396 as the official input file name. */
2397 if (main_input_filename == 0)
2398 main_input_filename = name;
2400 if (!output_bytecode)
2402 ASM_FILE_START (asm_out_file);
2404 #ifdef ASM_COMMENT_START
2405 if (flag_verbose_asm)
2407 /* Print the list of options in effect. */
2408 print_version (asm_out_file, ASM_COMMENT_START);
2409 print_switch_values (asm_out_file, 0, MAX_LINE,
2410 ASM_COMMENT_START, " ", "\n");
2411 /* Add a blank line here so it appears in assembler output but not
2413 fprintf (asm_out_file, "\n");
2418 /* Output something to inform GDB that this compilation was by GCC. Also
2419 serves to tell GDB file consists of bytecodes. */
2420 if (output_bytecode)
2421 fprintf (asm_out_file, "bc_gcc2_compiled.:\n");
2424 #ifndef ASM_IDENTIFY_GCC
2425 fprintf (asm_out_file, "gcc2_compiled.:\n");
2427 ASM_IDENTIFY_GCC (asm_out_file);
2431 /* Output something to identify which front-end produced this file. */
2432 #ifdef ASM_IDENTIFY_LANGUAGE
2433 ASM_IDENTIFY_LANGUAGE (asm_out_file);
2436 #ifndef ASM_OUTPUT_SECTION_NAME
2437 if (flag_function_sections)
2439 warning ("-ffunction-sections not supported for this target.");
2440 flag_function_sections = 0;
2444 if (flag_function_sections
2445 && (profile_flag || profile_block_flag))
2447 warning ("-ffunction-sections disabled; it makes profiling impossible.");
2448 flag_function_sections = 0;
2451 if (flag_function_sections && write_symbols != NO_DEBUG)
2452 warning ("-ffunction-sections may affect debugging on some targets.");
2454 if (output_bytecode)
2456 if (profile_flag || profile_block_flag)
2457 error ("profiling not supported in bytecode compilation");
2461 /* ??? Note: There used to be a conditional here
2462 to call assemble_zeros without fail if DBX_DEBUGGING_INFO is defined.
2463 This was to guarantee separation between gcc_compiled. and
2464 the first function, for the sake of dbx on Suns.
2465 However, having the extra zero here confused the Emacs
2466 code for unexec, and might confuse other programs too.
2467 Therefore, I took out that change.
2468 In future versions we should find another way to solve
2469 that dbx problem. -- rms, 23 May 93. */
2471 /* Don't let the first function fall at the same address
2472 as gcc_compiled., if profiling. */
2473 if (profile_flag || profile_block_flag)
2474 assemble_zeros (UNITS_PER_WORD);
2477 /* If dbx symbol table desired, initialize writing it
2478 and output the predefined types. */
2479 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
2480 if (write_symbols == DBX_DEBUG || write_symbols == XCOFF_DEBUG)
2481 TIMEVAR (symout_time, dbxout_init (asm_out_file, main_input_filename,
2484 #ifdef SDB_DEBUGGING_INFO
2485 if (write_symbols == SDB_DEBUG)
2486 TIMEVAR (symout_time, sdbout_init (asm_out_file, main_input_filename,
2489 #ifdef DWARF_DEBUGGING_INFO
2490 if (write_symbols == DWARF_DEBUG)
2491 TIMEVAR (symout_time, dwarfout_init (asm_out_file, main_input_filename));
2493 #ifdef DWARF2_UNWIND_INFO
2494 if (dwarf2out_do_frame ())
2495 dwarf2out_frame_init ();
2497 #ifdef DWARF2_DEBUGGING_INFO
2498 if (write_symbols == DWARF2_DEBUG)
2499 TIMEVAR (symout_time, dwarf2out_init (asm_out_file, main_input_filename));
2502 /* Initialize yet another pass. */
2504 if (!output_bytecode)
2505 init_final (main_input_filename);
2506 init_branch_prob (dump_base_name);
2508 start_time = get_run_time ();
2510 /* Call the parser, which parses the entire file
2511 (calling rest_of_compilation for each function). */
2513 if (yyparse () != 0)
2515 if (errorcount == 0)
2516 fprintf (stderr, "Errors detected in input file (your bison.simple is out of date)");
2518 /* In case there were missing closebraces,
2519 get us back to the global binding level. */
2520 while (! global_bindings_p ())
2524 output_func_start_profiler ();
2526 /* Compilation is now finished except for writing
2527 what's left of the symbol table output. */
2529 parse_time += get_run_time () - start_time;
2531 parse_time -= integration_time;
2532 parse_time -= varconst_time;
2534 globals = getdecls ();
2536 /* Really define vars that have had only a tentative definition.
2537 Really output inline functions that must actually be callable
2538 and have not been output so far. */
2541 int len = list_length (globals);
2542 tree *vec = (tree *) alloca (sizeof (tree) * len);
2547 /* Process the decls in reverse order--earliest first.
2548 Put them into VEC from back to front, then take out from front. */
2550 for (i = 0, decl = globals; i < len; i++, decl = TREE_CHAIN (decl))
2551 vec[len - i - 1] = decl;
2553 for (i = 0; i < len; i++)
2557 /* We're not deferring this any longer. */
2558 DECL_DEFER_OUTPUT (decl) = 0;
2560 if (TREE_CODE (decl) == VAR_DECL && DECL_SIZE (decl) == 0
2561 && incomplete_decl_finalize_hook != 0)
2562 (*incomplete_decl_finalize_hook) (decl);
2565 /* Now emit any global variables or functions that we have been putting
2566 off. We need to loop in case one of the things emitted here
2567 references another one which comes earlier in the list. */
2571 for (i = 0; i < len; i++)
2575 if (TREE_ASM_WRITTEN (decl) || DECL_EXTERNAL (decl))
2578 /* Don't write out static consts, unless we still need them.
2580 We also keep static consts if not optimizing (for debugging),
2581 unless the user specified -fno-keep-static-consts.
2582 ??? They might be better written into the debug information.
2583 This is possible when using DWARF.
2585 A language processor that wants static constants to be always
2586 written out (even if it is not used) is responsible for
2587 calling rest_of_decl_compilation itself. E.g. the C front-end
2588 calls rest_of_decl_compilation from finish_decl.
2589 One motivation for this is that is conventional in some
2590 environments to write things like:
2591 static const char rcsid[] = "... version string ...";
2592 intending to force the string to be in the executable.
2594 A language processor that would prefer to have unneeded
2595 static constants "optimized away" would just defer writing
2596 them out until here. E.g. C++ does this, because static
2597 constants are often defined in header files.
2599 ??? A tempting alternative (for both C and C++) would be
2600 to force a constant to be written if and only if it is
2601 defined in a main file, as opposed to an include file. */
2603 if (TREE_CODE (decl) == VAR_DECL && TREE_STATIC (decl)
2604 && (! TREE_READONLY (decl)
2605 || TREE_PUBLIC (decl)
2606 || (!optimize && flag_keep_static_consts)
2607 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl))))
2610 rest_of_decl_compilation (decl, NULL_PTR, 1, 1);
2613 if (TREE_CODE (decl) == FUNCTION_DECL
2614 && DECL_INITIAL (decl) != 0
2615 && DECL_SAVED_INSNS (decl) != 0
2616 && (flag_keep_inline_functions
2617 || TREE_PUBLIC (decl)
2618 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl))))
2621 temporary_allocation ();
2622 output_inline_function (decl);
2623 permanent_allocation (1);
2628 /* Now that all possible functions have been output, we can dump
2629 the exception table. */
2631 output_exception_table ();
2633 for (i = 0; i < len; i++)
2637 if (TREE_CODE (decl) == VAR_DECL && TREE_STATIC (decl)
2638 && ! TREE_ASM_WRITTEN (decl))
2639 /* Cancel the RTL for this decl so that, if debugging info
2640 output for global variables is still to come,
2641 this one will be omitted. */
2642 DECL_RTL (decl) = NULL;
2644 /* Warn about any function
2645 declared static but not defined.
2646 We don't warn about variables,
2647 because many programs have static variables
2648 that exist only to get some text into the object file. */
2649 if (TREE_CODE (decl) == FUNCTION_DECL
2651 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl)))
2652 && DECL_INITIAL (decl) == 0
2653 && DECL_EXTERNAL (decl)
2654 && ! DECL_ARTIFICIAL (decl)
2655 && ! TREE_PUBLIC (decl))
2657 pedwarn_with_decl (decl,
2658 "`%s' declared `static' but never defined");
2659 /* This symbol is effectively an "extern" declaration now. */
2660 TREE_PUBLIC (decl) = 1;
2661 assemble_external (decl);
2664 /* Warn about static fns or vars defined but not used,
2665 but not about inline functions or static consts
2666 since defining those in header files is normal practice. */
2668 && ((TREE_CODE (decl) == FUNCTION_DECL && ! DECL_INLINE (decl))
2669 || (TREE_CODE (decl) == VAR_DECL && ! TREE_READONLY (decl)))
2670 && ! DECL_IN_SYSTEM_HEADER (decl)
2671 && ! DECL_EXTERNAL (decl)
2672 && ! TREE_PUBLIC (decl)
2673 && ! TREE_USED (decl)
2674 && (TREE_CODE (decl) == FUNCTION_DECL || ! DECL_REGISTER (decl))
2675 /* The TREE_USED bit for file-scope decls
2676 is kept in the identifier, to handle multiple
2677 external decls in different scopes. */
2678 && ! TREE_USED (DECL_NAME (decl)))
2679 warning_with_decl (decl, "`%s' defined but not used");
2681 #ifdef SDB_DEBUGGING_INFO
2682 /* The COFF linker can move initialized global vars to the end.
2683 And that can screw up the symbol ordering.
2684 By putting the symbols in that order to begin with,
2685 we avoid a problem. mcsun!unido!fauern!tumuc!pes@uunet.uu.net. */
2686 if (write_symbols == SDB_DEBUG && TREE_CODE (decl) == VAR_DECL
2687 && TREE_PUBLIC (decl) && DECL_INITIAL (decl)
2688 && ! DECL_EXTERNAL (decl)
2689 && DECL_RTL (decl) != 0)
2690 TIMEVAR (symout_time, sdbout_symbol (decl, 0));
2692 /* Output COFF information for non-global
2693 file-scope initialized variables. */
2694 if (write_symbols == SDB_DEBUG
2695 && TREE_CODE (decl) == VAR_DECL
2696 && DECL_INITIAL (decl)
2697 && ! DECL_EXTERNAL (decl)
2698 && DECL_RTL (decl) != 0
2699 && GET_CODE (DECL_RTL (decl)) == MEM)
2700 TIMEVAR (symout_time, sdbout_toplevel_data (decl));
2701 #endif /* SDB_DEBUGGING_INFO */
2702 #ifdef DWARF_DEBUGGING_INFO
2703 /* Output DWARF information for file-scope tentative data object
2704 declarations, file-scope (extern) function declarations (which
2705 had no corresponding body) and file-scope tagged type declarations
2706 and definitions which have not yet been forced out. */
2708 if (write_symbols == DWARF_DEBUG
2709 && (TREE_CODE (decl) != FUNCTION_DECL || !DECL_INITIAL (decl)))
2710 TIMEVAR (symout_time, dwarfout_file_scope_decl (decl, 1));
2712 #ifdef DWARF2_DEBUGGING_INFO
2713 /* Output DWARF2 information for file-scope tentative data object
2714 declarations, file-scope (extern) function declarations (which
2715 had no corresponding body) and file-scope tagged type declarations
2716 and definitions which have not yet been forced out. */
2718 if (write_symbols == DWARF2_DEBUG
2719 && (TREE_CODE (decl) != FUNCTION_DECL || !DECL_INITIAL (decl)))
2720 TIMEVAR (symout_time, dwarf2out_decl (decl));
2725 /* Write out any pending weak symbol declarations. */
2729 /* Do dbx symbols */
2730 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
2731 if (write_symbols == DBX_DEBUG || write_symbols == XCOFF_DEBUG)
2732 TIMEVAR (symout_time,
2734 dbxout_finish (asm_out_file, main_input_filename);
2738 #ifdef DWARF_DEBUGGING_INFO
2739 if (write_symbols == DWARF_DEBUG)
2740 TIMEVAR (symout_time,
2746 #ifdef DWARF2_UNWIND_INFO
2747 if (dwarf2out_do_frame ())
2748 dwarf2out_frame_finish ();
2751 #ifdef DWARF2_DEBUGGING_INFO
2752 if (write_symbols == DWARF2_DEBUG)
2753 TIMEVAR (symout_time,
2755 dwarf2out_finish ();
2759 /* Output some stuff at end of file if nec. */
2761 if (!output_bytecode)
2763 end_final (dump_base_name);
2764 end_branch_prob (branch_prob_dump_file);
2767 ASM_FILE_END (asm_out_file);
2771 /* Language-specific end of compilation actions. */
2775 if (output_bytecode)
2776 bc_write_file (asm_out_file);
2778 /* Close the dump files. */
2780 if (flag_gen_aux_info)
2782 fclose (aux_info_file);
2784 unlink (aux_info_file_name);
2788 fclose (rtl_dump_file);
2791 fclose (jump_opt_dump_file);
2794 fclose (cse_dump_file);
2797 fclose (loop_dump_file);
2800 fclose (cse2_dump_file);
2802 if (branch_prob_dump)
2803 fclose (branch_prob_dump_file);
2806 fclose (flow_dump_file);
2810 dump_combine_total_stats (combine_dump_file);
2811 fclose (combine_dump_file);
2815 fclose (regmove_dump_file);
2818 fclose (sched_dump_file);
2821 fclose (local_reg_dump_file);
2823 if (global_reg_dump)
2824 fclose (global_reg_dump_file);
2827 fclose (sched2_dump_file);
2830 fclose (jump2_opt_dump_file);
2833 fclose (dbr_sched_dump_file);
2837 fclose (stack_reg_dump_file);
2840 /* Close non-debugging input and output files. Take special care to note
2841 whether fclose returns an error, since the pages might still be on the
2842 buffer chain while the file is open. */
2849 if (ferror (asm_out_file) != 0 || fclose (asm_out_file) != 0)
2850 fatal_io_error (asm_file_name);
2852 /* Print the times. */
2856 fprintf (stderr,"\n");
2857 print_time ("parse", parse_time);
2859 if (!output_bytecode)
2861 print_time ("integration", integration_time);
2862 print_time ("jump", jump_time);
2863 print_time ("cse", cse_time);
2864 print_time ("loop", loop_time);
2865 print_time ("cse2", cse2_time);
2866 print_time ("branch-prob", branch_prob_time);
2867 print_time ("flow", flow_time);
2868 print_time ("combine", combine_time);
2869 print_time ("regmove", regmove_time);
2870 print_time ("sched", sched_time);
2871 print_time ("local-alloc", local_alloc_time);
2872 print_time ("global-alloc", global_alloc_time);
2873 print_time ("sched2", sched2_time);
2874 print_time ("dbranch", dbr_sched_time);
2875 print_time ("shorten-branch", shorten_branch_time);
2876 print_time ("stack-reg", stack_reg_time);
2877 print_time ("final", final_time);
2878 print_time ("varconst", varconst_time);
2879 print_time ("symout", symout_time);
2880 print_time ("dump", dump_time);
2885 /* This is called from various places for FUNCTION_DECL, VAR_DECL,
2886 and TYPE_DECL nodes.
2888 This does nothing for local (non-static) variables.
2889 Otherwise, it sets up the RTL and outputs any assembler code
2890 (label definition, storage allocation and initialization).
2892 DECL is the declaration. If ASMSPEC is nonzero, it specifies
2893 the assembler symbol name to be used. TOP_LEVEL is nonzero
2894 if this declaration is not within a function. */
2897 rest_of_decl_compilation (decl, asmspec, top_level, at_end)
2903 /* Declarations of variables, and of functions defined elsewhere. */
2905 /* The most obvious approach, to put an #ifndef around where
2906 this macro is used, doesn't work since it's inside a macro call. */
2907 #ifndef ASM_FINISH_DECLARE_OBJECT
2908 #define ASM_FINISH_DECLARE_OBJECT(FILE, DECL, TOP, END)
2911 /* Forward declarations for nested functions are not "external",
2912 but we need to treat them as if they were. */
2913 if (TREE_STATIC (decl) || DECL_EXTERNAL (decl)
2914 || TREE_CODE (decl) == FUNCTION_DECL)
2915 TIMEVAR (varconst_time,
2917 make_decl_rtl (decl, asmspec, top_level);
2918 /* Initialized extern variable exists to be replaced
2919 with its value, or represents something that will be
2920 output in another file. */
2921 if (! (TREE_CODE (decl) == VAR_DECL
2922 && DECL_EXTERNAL (decl) && TREE_READONLY (decl)
2923 && DECL_INITIAL (decl) != 0
2924 && DECL_INITIAL (decl) != error_mark_node))
2925 /* Don't output anything
2926 when a tentative file-scope definition is seen.
2927 But at end of compilation, do output code for them. */
2928 if (! (! at_end && top_level
2929 && (DECL_INITIAL (decl) == 0
2930 || DECL_INITIAL (decl) == error_mark_node)))
2931 assemble_variable (decl, top_level, at_end, 0);
2932 if (!output_bytecode
2933 && decl == last_assemble_variable_decl)
2935 ASM_FINISH_DECLARE_OBJECT (asm_out_file, decl,
2939 else if (DECL_REGISTER (decl) && asmspec != 0)
2941 if (decode_reg_name (asmspec) >= 0)
2943 DECL_RTL (decl) = 0;
2944 make_decl_rtl (decl, asmspec, top_level);
2947 error ("invalid register name `%s' for register variable", asmspec);
2949 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
2950 else if ((write_symbols == DBX_DEBUG || write_symbols == XCOFF_DEBUG)
2951 && TREE_CODE (decl) == TYPE_DECL)
2952 TIMEVAR (symout_time, dbxout_symbol (decl, 0));
2954 #ifdef SDB_DEBUGGING_INFO
2955 else if (write_symbols == SDB_DEBUG && top_level
2956 && TREE_CODE (decl) == TYPE_DECL)
2957 TIMEVAR (symout_time, sdbout_symbol (decl, 0));
2961 /* Called after finishing a record, union or enumeral type. */
2964 rest_of_type_compilation (type, toplev)
2968 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
2969 if (write_symbols == DBX_DEBUG || write_symbols == XCOFF_DEBUG)
2970 TIMEVAR (symout_time, dbxout_symbol (TYPE_STUB_DECL (type), !toplev));
2972 #ifdef SDB_DEBUGGING_INFO
2973 if (write_symbols == SDB_DEBUG)
2974 TIMEVAR (symout_time, sdbout_symbol (TYPE_STUB_DECL (type), !toplev));
2978 /* This is called from finish_function (within yyparse)
2979 after each top-level definition is parsed.
2980 It is supposed to compile that function or variable
2981 and output the assembler code for it.
2982 After we return, the tree storage is freed. */
2985 rest_of_compilation (decl)
2989 int start_time = get_run_time ();
2991 /* Nonzero if we have saved the original DECL_INITIAL of the function,
2992 to be restored after we finish compiling the function
2993 (for use when compiling inline calls to this function). */
2994 tree saved_block_tree = 0;
2995 /* Likewise, for DECL_ARGUMENTS. */
2996 tree saved_arguments = 0;
2999 if (output_bytecode)
3002 /* If we are reconsidering an inline function
3003 at the end of compilation, skip the stuff for making it inline. */
3005 if (DECL_SAVED_INSNS (decl) == 0)
3010 /* If requested, consider whether to make this function inline. */
3011 if (DECL_INLINE (decl) || flag_inline_functions)
3012 TIMEVAR (integration_time,
3014 lose = function_cannot_inline_p (decl);
3015 if (lose || ! optimize)
3017 if (warn_inline && DECL_INLINE (decl))
3018 warning_with_decl (decl, lose);
3019 DECL_ABSTRACT_ORIGIN (decl) = 0;
3020 /* Don't really compile an extern inline function.
3021 If we can't make it inline, pretend
3022 it was only declared. */
3023 if (DECL_EXTERNAL (decl))
3025 DECL_INITIAL (decl) = 0;
3026 goto exit_rest_of_compilation;
3030 /* ??? Note that this has the effect of making it look
3031 like "inline" was specified for a function if we choose
3032 to inline it. This isn't quite right, but it's
3033 probably not worth the trouble to fix. */
3034 inlineable = DECL_INLINE (decl) = 1;
3037 insns = get_insns ();
3039 /* Dump the rtl code if we are dumping rtl. */
3044 fprintf (rtl_dump_file, "\n;; Function %s\n\n",
3045 (*decl_printable_name) (decl, 2));
3046 if (DECL_SAVED_INSNS (decl))
3047 fprintf (rtl_dump_file, ";; (integrable)\n\n");
3048 print_rtl (rtl_dump_file, insns);
3049 fflush (rtl_dump_file);
3052 /* If we can, defer compiling inlines until EOF.
3053 save_for_inline_copying can be extremely expensive. */
3054 if (inlineable && ! decl_function_context (decl))
3055 DECL_DEFER_OUTPUT (decl) = 1;
3057 /* If function is inline, and we don't yet know whether to
3058 compile it by itself, defer decision till end of compilation.
3059 finish_compilation will call rest_of_compilation again
3060 for those functions that need to be output. Also defer those
3061 functions that we are supposed to defer. We cannot defer
3062 functions containing nested functions since the nested function
3063 data is in our non-saved obstack. */
3065 if (! current_function_contains_functions
3066 && (DECL_DEFER_OUTPUT (decl)
3067 || (DECL_INLINE (decl)
3068 && ((! TREE_PUBLIC (decl) && ! TREE_ADDRESSABLE (decl)
3069 && ! flag_keep_inline_functions)
3070 || DECL_EXTERNAL (decl)))))
3072 DECL_DEFER_OUTPUT (decl) = 1;
3074 /* If -Wreturn-type, we have to do a bit of compilation. */
3075 if (! warn_return_type)
3077 #ifdef DWARF_DEBUGGING_INFO
3078 /* Generate the DWARF info for the "abstract" instance
3079 of a function which we may later generate inlined and/or
3080 out-of-line instances of. */
3081 if (write_symbols == DWARF_DEBUG)
3083 set_decl_abstract_flags (decl, 1);
3084 TIMEVAR (symout_time, dwarfout_file_scope_decl (decl, 0));
3085 set_decl_abstract_flags (decl, 0);
3088 #ifdef DWARF2_DEBUGGING_INFO
3089 /* Generate the DWARF2 info for the "abstract" instance
3090 of a function which we may later generate inlined and/or
3091 out-of-line instances of. */
3092 if (write_symbols == DWARF2_DEBUG)
3094 set_decl_abstract_flags (decl, 1);
3095 TIMEVAR (symout_time, dwarf2out_decl (decl));
3096 set_decl_abstract_flags (decl, 0);
3099 TIMEVAR (integration_time, save_for_inline_nocopy (decl));
3100 RTX_INTEGRATED_P (DECL_SAVED_INSNS (decl)) = inlineable;
3101 goto exit_rest_of_compilation;
3105 /* If we have to compile the function now, save its rtl and subdecls
3106 so that its compilation will not affect what others get. */
3107 if (inlineable || DECL_DEFER_OUTPUT (decl))
3109 #ifdef DWARF_DEBUGGING_INFO
3110 /* Generate the DWARF info for the "abstract" instance of
3111 a function which we will generate an out-of-line instance
3112 of almost immediately (and which we may also later generate
3113 various inlined instances of). */
3114 if (write_symbols == DWARF_DEBUG)
3116 set_decl_abstract_flags (decl, 1);
3117 TIMEVAR (symout_time, dwarfout_file_scope_decl (decl, 0));
3118 set_decl_abstract_flags (decl, 0);
3121 #ifdef DWARF2_DEBUGGING_INFO
3122 /* Generate the DWARF2 info for the "abstract" instance of
3123 a function which we will generate an out-of-line instance
3124 of almost immediately (and which we may also later generate
3125 various inlined instances of). */
3126 if (write_symbols == DWARF2_DEBUG)
3128 set_decl_abstract_flags (decl, 1);
3129 TIMEVAR (symout_time, dwarf2out_decl (decl));
3130 set_decl_abstract_flags (decl, 0);
3133 saved_block_tree = DECL_INITIAL (decl);
3134 saved_arguments = DECL_ARGUMENTS (decl);
3135 TIMEVAR (integration_time, save_for_inline_copying (decl));
3136 RTX_INTEGRATED_P (DECL_SAVED_INSNS (decl)) = inlineable;
3139 /* If specified extern inline but we aren't inlining it, we are
3141 if (DECL_INLINE (decl) && DECL_EXTERNAL (decl))
3142 goto exit_rest_of_compilation;
3145 if (! DECL_DEFER_OUTPUT (decl))
3146 TREE_ASM_WRITTEN (decl) = 1;
3148 /* Now that integrate will no longer see our rtl, we need not distinguish
3149 between the return value of this function and the return value of called
3151 rtx_equal_function_value_matters = 0;
3153 /* Don't return yet if -Wreturn-type; we need to do jump_optimize. */
3154 if ((rtl_dump_and_exit || flag_syntax_only) && !warn_return_type)
3156 goto exit_rest_of_compilation;
3159 /* Add an unwinder for exception handling, if needed.
3160 This must be done before we finalize PIC code. */
3164 /* If we are doing position-independent code generation, now
3165 is the time to output special prologues and epilogues.
3166 We do not want to do this earlier, because it just clutters
3167 up inline functions with meaningless insns. */
3172 /* From now on, allocate rtl in current_obstack, not in saveable_obstack.
3173 Note that that may have been done above, in save_for_inline_copying.
3174 The call to resume_temporary_allocation near the end of this function
3175 goes back to the usual state of affairs. This must be done after
3176 we've built up any unwinders for exception handling, and done
3177 the FINALIZE_PIC work, if necessary. */
3179 rtl_in_current_obstack ();
3181 insns = get_insns ();
3183 /* Copy any shared structure that should not be shared. */
3185 unshare_all_rtl (insns);
3187 /* Instantiate all virtual registers. */
3189 instantiate_virtual_regs (current_function_decl, get_insns ());
3191 /* See if we have allocated stack slots that are not directly addressable.
3192 If so, scan all the insns and create explicit address computation
3193 for all references to such slots. */
3194 /* fixup_stack_slots (); */
3196 /* Find all the EH handlers. */
3197 find_exception_handler_labels ();
3199 /* Always do one jump optimization pass to ensure that JUMP_LABEL fields
3200 are initialized and to compute whether control can drop off the end
3202 TIMEVAR (jump_time, reg_scan (insns, max_reg_num (), 0));
3203 TIMEVAR (jump_time, jump_optimize (insns, 0, 0, 1));
3205 /* Now is when we stop if -fsyntax-only and -Wreturn-type. */
3206 if (rtl_dump_and_exit || flag_syntax_only || DECL_DEFER_OUTPUT (decl))
3207 goto exit_rest_of_compilation;
3209 /* Dump rtl code after jump, if we are doing that. */
3214 fprintf (jump_opt_dump_file, "\n;; Function %s\n\n",
3215 (*decl_printable_name) (decl, 2));
3216 print_rtl (jump_opt_dump_file, insns);
3217 fflush (jump_opt_dump_file);
3220 /* Perform common subexpression elimination.
3221 Nonzero value from `cse_main' means that jumps were simplified
3222 and some code may now be unreachable, so do
3223 jump optimization again. */
3228 fprintf (cse_dump_file, "\n;; Function %s\n\n",
3229 (*decl_printable_name) (decl, 2));
3234 TIMEVAR (cse_time, reg_scan (insns, max_reg_num (), 1));
3236 if (flag_thread_jumps)
3237 /* Hacks by tiemann & kenner. */
3238 TIMEVAR (jump_time, thread_jumps (insns, max_reg_num (), 1));
3240 TIMEVAR (cse_time, tem = cse_main (insns, max_reg_num (),
3242 TIMEVAR (cse_time, delete_dead_from_cse (insns, max_reg_num ()));
3244 if (tem || optimize > 1)
3245 TIMEVAR (jump_time, jump_optimize (insns, 0, 0, 0));
3248 /* Dump rtl code after cse, if we are doing that. */
3253 print_rtl (cse_dump_file, insns);
3254 fflush (cse_dump_file);
3260 fprintf (loop_dump_file, "\n;; Function %s\n\n",
3261 (*decl_printable_name) (decl, 2));
3264 /* Move constant computations out of loops. */
3270 int save_flag_unroll_loops;
3271 int save_flag_unroll_all_loops;
3273 if (flag_rerun_loop_opt)
3275 /* We only want to perform unrolling once. */
3276 save_flag_unroll_loops = flag_unroll_loops;
3277 save_flag_unroll_all_loops = flag_unroll_all_loops;
3278 flag_unroll_loops = 0;
3279 flag_unroll_all_loops = 0;
3281 loop_optimize (insns, loop_dump_file);
3283 /* The regscan pass may not be necessary, but let's
3284 be safe until we can prove otherwise. */
3285 reg_scan (insns, max_reg_num (), 1);
3287 /* Restore loop unrolling flags. */
3288 flag_unroll_loops = save_flag_unroll_loops;
3289 flag_unroll_all_loops = save_flag_unroll_all_loops;
3291 loop_optimize (insns, loop_dump_file);
3295 /* Dump rtl code after loop opt, if we are doing that. */
3300 print_rtl (loop_dump_file, insns);
3301 fflush (loop_dump_file);
3307 fprintf (cse2_dump_file, "\n;; Function %s\n\n",
3308 (*decl_printable_name) (decl, 2));
3311 if (optimize > 0 && flag_rerun_cse_after_loop)
3313 /* Running another jump optimization pass before the second
3314 cse pass sometimes simplifies the RTL enough to allow
3315 the second CSE pass to do a better job. Jump_optimize can change
3316 max_reg_num so we must rerun reg_scan afterwards.
3317 ??? Rework to not call reg_scan so often. */
3318 TIMEVAR (jump_time, reg_scan (insns, max_reg_num (), 0));
3319 TIMEVAR (jump_time, jump_optimize (insns, 0, 0, 1));
3321 TIMEVAR (cse2_time, reg_scan (insns, max_reg_num (), 0));
3322 TIMEVAR (cse2_time, tem = cse_main (insns, max_reg_num (),
3323 1, cse2_dump_file));
3325 TIMEVAR (jump_time, jump_optimize (insns, 0, 0, 0));
3328 if (optimize > 0 && flag_thread_jumps)
3330 /* This pass of jump threading straightens out code
3331 that was kinked by loop optimization. */
3332 TIMEVAR (jump_time, reg_scan (insns, max_reg_num (), 0));
3333 TIMEVAR (jump_time, thread_jumps (insns, max_reg_num (), 0));
3335 /* Dump rtl code after cse, if we are doing that. */
3340 print_rtl (cse2_dump_file, insns);
3341 fflush (cse2_dump_file);
3344 if (branch_prob_dump)
3347 fprintf (branch_prob_dump_file, "\n;; Function %s\n\n",
3348 (*decl_printable_name) (decl, 2));
3351 if (profile_arc_flag || flag_test_coverage || flag_branch_probabilities)
3352 TIMEVAR (branch_prob_time,
3354 branch_prob (insns, branch_prob_dump_file);
3357 if (branch_prob_dump)
3360 print_rtl (branch_prob_dump_file, insns);
3361 fflush (branch_prob_dump_file);
3363 /* We are no longer anticipating cse in this function, at least. */
3365 cse_not_expected = 1;
3367 /* Now we choose between stupid (pcc-like) register allocation
3368 (if we got the -noreg switch and not -opt)
3369 and smart register allocation. */
3371 if (optimize > 0) /* Stupid allocation probably won't work */
3372 obey_regdecls = 0; /* if optimizations being done. */
3376 /* Print function header into flow dump now
3377 because doing the flow analysis makes some of the dump. */
3382 fprintf (flow_dump_file, "\n;; Function %s\n\n",
3383 (*decl_printable_name) (decl, 2));
3390 regclass (insns, max_reg_num ());
3391 stupid_life_analysis (insns, max_reg_num (),
3397 /* Do control and data flow analysis,
3398 and write some of the results to dump file. */
3400 TIMEVAR (flow_time, flow_analysis (insns, max_reg_num (),
3402 if (warn_uninitialized)
3404 uninitialized_vars_warning (DECL_INITIAL (decl));
3405 setjmp_args_warning ();
3409 /* Dump rtl after flow analysis. */
3414 print_rtl_with_bb (flow_dump_file, insns);
3415 fflush (flow_dump_file);
3418 /* If -opt, try combining insns through substitution. */
3421 TIMEVAR (combine_time, combine_instructions (insns, max_reg_num ()));
3423 /* Dump rtl code after insn combination. */
3428 fprintf (combine_dump_file, "\n;; Function %s\n\n",
3429 (*decl_printable_name) (decl, 2));
3430 dump_combine_stats (combine_dump_file);
3431 print_rtl_with_bb (combine_dump_file, insns);
3432 fflush (combine_dump_file);
3438 fprintf (regmove_dump_file, "\n;; Function %s\n\n",
3439 (*decl_printable_name) (decl, 2));
3442 /* Register allocation pre-pass, to reduce number of moves
3443 necessary for two-address machines. */
3444 if (optimize > 0 && flag_regmove)
3445 TIMEVAR (regmove_time, regmove_optimize (insns, max_reg_num (),
3446 regmove_dump_file));
3451 print_rtl_with_bb (regmove_dump_file, insns);
3452 fflush (regmove_dump_file);
3455 /* Print function header into sched dump now
3456 because doing the sched analysis makes some of the dump. */
3461 fprintf (sched_dump_file, "\n;; Function %s\n\n",
3462 (*decl_printable_name) (decl, 2));
3465 if (optimize > 0 && flag_schedule_insns)
3467 /* Do control and data sched analysis,
3468 and write some of the results to dump file. */
3470 TIMEVAR (sched_time, schedule_insns (sched_dump_file));
3473 /* Dump rtl after instruction scheduling. */
3478 print_rtl_with_bb (sched_dump_file, insns);
3479 fflush (sched_dump_file);
3482 /* Unless we did stupid register allocation,
3483 allocate pseudo-regs that are used only within 1 basic block. */
3486 TIMEVAR (local_alloc_time,
3488 regclass (insns, max_reg_num ());
3492 /* Dump rtl code after allocating regs within basic blocks. */
3497 fprintf (local_reg_dump_file, "\n;; Function %s\n\n",
3498 (*decl_printable_name) (decl, 2));
3499 dump_flow_info (local_reg_dump_file);
3500 dump_local_alloc (local_reg_dump_file);
3501 print_rtl_with_bb (local_reg_dump_file, insns);
3502 fflush (local_reg_dump_file);
3505 if (global_reg_dump)
3507 fprintf (global_reg_dump_file, "\n;; Function %s\n\n",
3508 (*decl_printable_name) (decl, 2)));
3510 /* Save the last label number used so far, so reorg can tell
3511 when it's safe to kill spill regs. */
3512 max_label_num_after_reload = max_label_num ();
3514 /* Unless we did stupid register allocation,
3515 allocate remaining pseudo-regs, then do the reload pass
3516 fixing up any insns that are invalid. */
3518 TIMEVAR (global_alloc_time,
3521 failure = global_alloc (global_reg_dump_file);
3523 failure = reload (insns, 0, global_reg_dump_file);
3526 if (global_reg_dump)
3529 dump_global_regs (global_reg_dump_file);
3530 print_rtl_with_bb (global_reg_dump_file, insns);
3531 fflush (global_reg_dump_file);
3535 goto exit_rest_of_compilation;
3537 reload_completed = 1;
3539 /* Do a very simple CSE pass over just the hard registers. */
3541 reload_cse_regs (insns);
3543 /* On some machines, the prologue and epilogue code, or parts thereof,
3544 can be represented as RTL. Doing so lets us schedule insns between
3545 it and the rest of the code and also allows delayed branch
3546 scheduling to operate in the epilogue. */
3548 thread_prologue_and_epilogue_insns (insns);
3550 if (optimize > 0 && flag_schedule_insns_after_reload)
3555 fprintf (sched2_dump_file, "\n;; Function %s\n\n",
3556 (*decl_printable_name) (decl, 2));
3559 /* Do control and data sched analysis again,
3560 and write some more of the results to dump file. */
3562 TIMEVAR (sched2_time, schedule_insns (sched2_dump_file));
3564 /* Dump rtl after post-reorder instruction scheduling. */
3569 print_rtl_with_bb (sched2_dump_file, insns);
3570 fflush (sched2_dump_file);
3574 #ifdef LEAF_REGISTERS
3576 if (optimize > 0 && only_leaf_regs_used () && leaf_function_p ())
3580 /* One more attempt to remove jumps to .+1
3581 left by dead-store-elimination.
3582 Also do cross-jumping this time
3583 and delete no-op move insns. */
3587 TIMEVAR (jump_time, jump_optimize (insns, 1, 1, 0));
3590 /* Dump rtl code after jump, if we are doing that. */
3595 fprintf (jump2_opt_dump_file, "\n;; Function %s\n\n",
3596 (*decl_printable_name) (decl, 2));
3597 print_rtl_with_bb (jump2_opt_dump_file, insns);
3598 fflush (jump2_opt_dump_file);
3601 /* If a machine dependent reorganization is needed, call it. */
3602 #ifdef MACHINE_DEPENDENT_REORG
3603 MACHINE_DEPENDENT_REORG (insns);
3606 /* If a scheduling pass for delayed branches is to be done,
3607 call the scheduling code. */
3610 if (optimize > 0 && flag_delayed_branch)
3612 TIMEVAR (dbr_sched_time, dbr_schedule (insns, dbr_sched_dump_file));
3617 fprintf (dbr_sched_dump_file, "\n;; Function %s\n\n",
3618 (*decl_printable_name) (decl, 2));
3619 print_rtl_with_bb (dbr_sched_dump_file, insns);
3620 fflush (dbr_sched_dump_file);
3626 /* Shorten branches. */
3627 TIMEVAR (shorten_branch_time,
3629 shorten_branches (get_insns ());
3633 TIMEVAR (stack_reg_time, reg_to_stack (insns, stack_reg_dump_file));
3638 fprintf (stack_reg_dump_file, "\n;; Function %s\n\n",
3639 (*decl_printable_name) (decl, 2));
3640 print_rtl_with_bb (stack_reg_dump_file, insns);
3641 fflush (stack_reg_dump_file);
3646 /* Now turn the rtl into assembler code. */
3648 TIMEVAR (final_time,
3653 /* Get the function's name, as described by its RTL.
3654 This may be different from the DECL_NAME name used
3655 in the source file. */
3657 x = DECL_RTL (decl);
3658 if (GET_CODE (x) != MEM)
3661 if (GET_CODE (x) != SYMBOL_REF)
3663 fnname = XSTR (x, 0);
3665 assemble_start_function (decl, fnname);
3666 final_start_function (insns, asm_out_file, optimize);
3667 final (insns, asm_out_file, optimize, 0);
3668 final_end_function (insns, asm_out_file, optimize);
3669 assemble_end_function (decl, fnname);
3670 fflush (asm_out_file);
3672 /* Release all memory held by regsets now */
3673 regset_release_memory ();
3676 /* Write DBX symbols if requested */
3678 /* Note that for those inline functions where we don't initially
3679 know for certain that we will be generating an out-of-line copy,
3680 the first invocation of this routine (rest_of_compilation) will
3681 skip over this code by doing a `goto exit_rest_of_compilation;'.
3682 Later on, finish_compilation will call rest_of_compilation again
3683 for those inline functions that need to have out-of-line copies
3684 generated. During that call, we *will* be routed past here. */
3686 #ifdef DBX_DEBUGGING_INFO
3687 if (write_symbols == DBX_DEBUG)
3688 TIMEVAR (symout_time, dbxout_function (decl));
3691 #ifdef DWARF_DEBUGGING_INFO
3692 if (write_symbols == DWARF_DEBUG)
3693 TIMEVAR (symout_time, dwarfout_file_scope_decl (decl, 0));
3696 #ifdef DWARF2_DEBUGGING_INFO
3697 if (write_symbols == DWARF2_DEBUG)
3698 TIMEVAR (symout_time, dwarf2out_decl (decl));
3701 exit_rest_of_compilation:
3703 /* In case the function was not output,
3704 don't leave any temporary anonymous types
3705 queued up for sdb output. */
3706 #ifdef SDB_DEBUGGING_INFO
3707 if (write_symbols == SDB_DEBUG)
3708 sdbout_types (NULL_TREE);
3711 /* Put back the tree of subblocks and list of arguments
3712 from before we copied them.
3713 Code generation and the output of debugging info may have modified
3714 the copy, but the original is unchanged. */
3716 if (saved_block_tree != 0)
3718 DECL_INITIAL (decl) = saved_block_tree;
3719 DECL_ARGUMENTS (decl) = saved_arguments;
3720 DECL_ABSTRACT_ORIGIN (decl) = NULL_TREE;
3723 reload_completed = 0;
3725 /* Clear out the insn_length contents now that they are no longer valid. */
3726 init_insn_lengths ();
3728 /* Clear out the real_constant_chain before some of the rtx's
3729 it runs through become garbage. */
3731 clear_const_double_mem ();
3733 /* Cancel the effect of rtl_in_current_obstack. */
3735 resume_temporary_allocation ();
3737 /* Show no temporary slots allocated. */
3741 /* The parsing time is all the time spent in yyparse
3742 *except* what is spent in this function. */
3744 parse_time -= get_run_time () - start_time;
3747 /* Entry point of cc1/c++. Decode command args, then call compile_file.
3748 Exit code is 35 if can't open files, 34 if fatal error,
3749 33 if had nonfatal errors, else success. */
3752 main (argc, argv, envp)
3759 int flag_print_mem = 0;
3760 int version_flag = 0;
3763 /* save in case md file wants to emit args as a comment. */
3767 p = argv[0] + strlen (argv[0]);
3768 while (p != argv[0] && p[-1] != '/'
3769 #ifdef DIR_SEPARATOR
3770 && p[-1] != DIR_SEPARATOR
3777 /* Get rid of any avoidable limit on stack size. */
3781 /* Set the stack limit huge so that alloca does not fail. */
3782 getrlimit (RLIMIT_STACK, &rlim);
3783 rlim.rlim_cur = rlim.rlim_max;
3784 setrlimit (RLIMIT_STACK, &rlim);
3786 #endif /* RLIMIT_STACK */
3788 signal (SIGFPE, float_signal);
3791 signal (SIGPIPE, pipe_closed);
3794 decl_printable_name = decl_name;
3795 lang_expand_expr = (struct rtx_def *(*)()) do_abort;
3797 /* Initialize whether `char' is signed. */
3798 flag_signed_char = DEFAULT_SIGNED_CHAR;
3799 #ifdef DEFAULT_SHORT_ENUMS
3800 /* Initialize how much space enums occupy, by default. */
3801 flag_short_enums = DEFAULT_SHORT_ENUMS;
3804 /* Scan to see what optimization level has been specified. That will
3805 determine the default value of many flags. */
3806 for (i = 1; i < argc; i++)
3808 if (!strcmp (argv[i], "-O"))
3812 else if (argv[i][0] == '-' && argv[i][1] == 'O')
3814 /* Handle -O2, -O3, -O69, ... */
3815 char *p = &argv[i][2];
3819 if (! (c >= '0' && c <= '9'))
3822 optimize = atoi (&argv[i][2]);
3826 obey_regdecls = (optimize == 0);
3831 flag_thread_jumps = 1;
3833 flag_delayed_branch = 1;
3835 #ifdef CAN_DEBUG_WITHOUT_FP
3836 flag_omit_frame_pointer = 1;
3838 flag_alias_check = 1;
3843 flag_cse_follow_jumps = 1;
3844 flag_cse_skip_blocks = 1;
3845 flag_expensive_optimizations = 1;
3846 flag_strength_reduce = 1;
3847 flag_rerun_cse_after_loop = 1;
3848 flag_rerun_loop_opt = 1;
3849 flag_caller_saves = 1;
3851 #ifdef INSN_SCHEDULING
3852 flag_schedule_insns = 1;
3853 flag_schedule_insns_after_reload = 1;
3860 flag_inline_functions = 1;
3863 /* Initialize target_flags before OPTIMIZATION_OPTIONS so the latter can
3866 set_target_switch ("");
3868 #ifdef OPTIMIZATION_OPTIONS
3869 /* Allow default optimizations to be specified on a per-machine basis. */
3870 OPTIMIZATION_OPTIONS (optimize);
3873 /* Initialize register usage now so switches may override. */
3876 for (i = 1; i < argc; i++)
3879 /* If this is a language-specific option,
3880 decode it in a language-specific way. */
3881 for (j = 0; lang_options[j] != 0; j++)
3882 if (!strncmp (argv[i], lang_options[j],
3883 strlen (lang_options[j])))
3885 if (lang_options[j] != 0)
3886 /* If the option is valid for *some* language,
3887 treat it as valid even if this language doesn't understand it. */
3888 lang_decode_option (argv[i]);
3889 else if (argv[i][0] == '-' && argv[i][1] != 0)
3891 register char *str = argv[i] + 1;
3896 set_target_switch (&str[1]);
3897 else if (!strcmp (str, "dumpbase"))
3899 dump_base_name = argv[++i];
3901 else if (str[0] == 'd')
3903 register char *p = &str[1];
3908 branch_prob_dump = 1;
3912 global_reg_dump = 1;
3919 cse_dump = 1, cse2_dump = 1;
3925 branch_prob_dump = 1;
3940 global_reg_dump = 1;
3958 flag_print_asm_name = 1;
3982 rtl_dump_and_exit = 1;
3989 else if (str[0] == 'f')
3991 register char *p = &str[1];
3994 /* Some kind of -f option.
3995 P's value is the option sans `-f'.
3996 Search for it in the table of options. */
3999 !found && j < sizeof (f_options) / sizeof (f_options[0]);
4002 if (!strcmp (p, f_options[j].string))
4004 *f_options[j].variable = f_options[j].on_value;
4005 /* A goto here would be cleaner,
4006 but breaks the vax pcc. */
4009 if (p[0] == 'n' && p[1] == 'o' && p[2] == '-'
4010 && ! strcmp (p+3, f_options[j].string))
4012 *f_options[j].variable = ! f_options[j].on_value;
4020 #ifdef INSN_SCHEDULING
4021 else if (!strncmp (p, "sched-verbose-",14))
4022 fix_sched_param("verbose",&p[14]);
4023 else if (!strncmp (p, "sched-max-",10))
4024 fix_sched_param("max",&p[10]);
4025 else if (!strncmp (p, "sched-inter-max-b-",18))
4026 fix_sched_param("interblock-max-blocks",&p[18]);
4027 else if (!strncmp (p, "sched-inter-max-i-",18))
4028 fix_sched_param("interblock-max-insns",&p[18]);
4031 else if (!strncmp (p, "fixed-", 6))
4032 fix_register (&p[6], 1, 1);
4033 else if (!strncmp (p, "call-used-", 10))
4034 fix_register (&p[10], 0, 1);
4035 else if (!strncmp (p, "call-saved-", 11))
4036 fix_register (&p[11], 0, 0);
4038 error ("Invalid option `%s'", argv[i]);
4040 else if (str[0] == 'O')
4042 register char *p = str+1;
4043 while (*p && *p >= '0' && *p <= '9')
4048 error ("Invalid option `%s'", argv[i]);
4050 else if (!strcmp (str, "pedantic"))
4052 else if (!strcmp (str, "pedantic-errors"))
4053 flag_pedantic_errors = pedantic = 1;
4054 else if (!strcmp (str, "quiet"))
4056 else if (!strcmp (str, "version"))
4058 else if (!strcmp (str, "w"))
4059 inhibit_warnings = 1;
4060 else if (!strcmp (str, "W"))
4063 /* We save the value of warn_uninitialized, since if they put
4064 -Wuninitialized on the command line, we need to generate a
4065 warning about not using it without also specifying -O. */
4066 if (warn_uninitialized != 1)
4067 warn_uninitialized = 2;
4069 else if (str[0] == 'W')
4071 register char *p = &str[1];
4074 /* Some kind of -W option.
4075 P's value is the option sans `-W'.
4076 Search for it in the table of options. */
4079 !found && j < sizeof (W_options) / sizeof (W_options[0]);
4082 if (!strcmp (p, W_options[j].string))
4084 *W_options[j].variable = W_options[j].on_value;
4085 /* A goto here would be cleaner,
4086 but breaks the vax pcc. */
4089 if (p[0] == 'n' && p[1] == 'o' && p[2] == '-'
4090 && ! strcmp (p+3, W_options[j].string))
4092 *W_options[j].variable = ! W_options[j].on_value;
4099 else if (!strncmp (p, "id-clash-", 9))
4105 if (*endp >= '0' && *endp <= '9')
4109 error ("Invalid option `%s'", argv[i]);
4114 id_clash_len = atoi (str + 10);
4117 else if (!strncmp (p, "larger-than-", 12))
4119 char *endp = p + 12;
4123 if (*endp >= '0' && *endp <= '9')
4127 error ("Invalid option `%s'", argv[i]);
4128 goto larger_than_lose;
4131 warn_larger_than = 1;
4132 larger_than_size = atoi (str + 13);
4136 error ("Invalid option `%s'", argv[i]);
4138 else if (!strcmp (str, "p"))
4142 else if (!strcmp (str, "a"))
4144 #if !defined (BLOCK_PROFILER) || !defined (FUNCTION_BLOCK_PROFILER)
4145 warning ("`-a' option (basic block profile) not supported");
4147 profile_block_flag = (profile_block_flag < 2) ? 1 : 3;
4150 else if (!strcmp (str, "ax"))
4152 #if !defined (FUNCTION_BLOCK_PROFILER_EXIT) || !defined (BLOCK_PROFILER) || !defined (FUNCTION_BLOCK_PROFILER)
4153 warning ("`-ax' option (jump profiling) not supported");
4155 profile_block_flag = (!profile_block_flag
4156 || profile_block_flag == 2) ? 2 : 3;
4159 else if (str[0] == 'g')
4163 /* A lot of code assumes write_symbols == NO_DEBUG if the
4164 debugging level is 0 (thus -gstabs1 -gstabs0 would lose track
4165 of what debugging type has been selected). This records the
4166 selected type. It is an error to specify more than one
4168 static enum debug_info_type selected_debug_type = NO_DEBUG;
4169 /* Non-zero if debugging format has been explicitly set.
4170 -g and -ggdb don't explicitly set the debugging format so
4171 -gdwarf -g3 is equivalent to -gdwarf3. */
4172 static int type_explicitly_set_p = 0;
4173 /* Table of supported debugging formats. */
4176 /* Since PREFERRED_DEBUGGING_TYPE isn't necessarily a
4177 constant expression, we use NO_DEBUG in its place. */
4178 enum debug_info_type debug_type;
4179 int use_extensions_p;
4180 } *da, debug_args[] = {
4181 { "g", NO_DEBUG, DEFAULT_GDB_EXTENSIONS },
4182 { "ggdb", NO_DEBUG, 1 },
4183 #ifdef DBX_DEBUGGING_INFO
4184 { "gstabs", DBX_DEBUG, 0 },
4185 { "gstabs+", DBX_DEBUG, 1 },
4187 #ifdef DWARF_DEBUGGING_INFO
4188 { "gdwarf", DWARF_DEBUG, 0 },
4189 { "gdwarf+", DWARF_DEBUG, 1 },
4191 #ifdef DWARF2_DEBUGGING_INFO
4192 { "gdwarf-2", DWARF2_DEBUG, 0 },
4194 #ifdef XCOFF_DEBUGGING_INFO
4195 { "gxcoff", XCOFF_DEBUG, 0 },
4196 { "gxcoff+", XCOFF_DEBUG, 1 },
4198 #ifdef SDB_DEBUGGING_INFO
4199 { "gcoff", SDB_DEBUG, 0 },
4203 /* Indexed by enum debug_info_type. */
4204 static char *debug_type_names[] = {
4205 "none", "stabs", "coff", "dwarf-1", "dwarf-2", "xcoff"
4208 /* Look up STR in the table. */
4209 for (da = debug_args; da->arg; da++)
4211 if (! strncmp (str, da->arg, strlen (da->arg)))
4213 enum debug_info_type type = da->debug_type;
4216 p = str + strlen (da->arg);
4217 if (*p && (*p < '0' || *p > '9'))
4221 while (*q && (*q >= '0' && *q <= '9'))
4226 level = 2; /* default debugging info level */
4227 if (*q || level > 3)
4229 warning ("invalid debug level specification in option: `-%s'",
4231 /* ??? This error message is incorrect in the case of
4233 warning ("no debugging information will be generated");
4237 if (type == NO_DEBUG)
4239 type = PREFERRED_DEBUGGING_TYPE;
4240 if (len > 1 && strncmp (str, "ggdb", len) == 0)
4242 #ifdef DWARF2_DEBUGGING_INFO
4243 type = DWARF2_DEBUG;
4245 #ifdef DBX_DEBUGGING_INFO
4252 if (type == NO_DEBUG)
4253 warning ("`-%s' not supported by this configuration of GCC",
4256 /* Does it conflict with an already selected type? */
4257 if (type_explicitly_set_p
4258 /* -g/-ggdb don't conflict with anything */
4259 && da->debug_type != NO_DEBUG
4260 && type != selected_debug_type)
4261 warning ("`-%s' ignored, conflicts with `-g%s'",
4262 str, debug_type_names[(int) selected_debug_type]);
4265 /* If the format has already been set, -g/-ggdb
4266 only change the debug level. */
4267 if (type_explicitly_set_p
4268 && da->debug_type == NO_DEBUG)
4269 ; /* don't change debugging type */
4272 selected_debug_type = type;
4273 type_explicitly_set_p = da->debug_type != NO_DEBUG;
4275 write_symbols = (level == 0
4277 : selected_debug_type);
4278 use_gnu_debug_info_extensions = da->use_extensions_p;
4279 debug_info_level = (enum debug_info_level) level;
4285 warning ("`-%s' not supported by this configuration of GCC",
4288 else if (!strcmp (str, "o"))
4290 asm_file_name = argv[++i];
4292 else if (str[0] == 'G')
4294 g_switch_set = TRUE;
4295 g_switch_value = atoi ((str[1] != '\0') ? str+1 : argv[++i]);
4297 else if (!strncmp (str, "aux-info", 8))
4299 flag_gen_aux_info = 1;
4300 aux_info_file_name = (str[8] != '\0' ? str+8 : argv[++i]);
4303 error ("Invalid option `%s'", argv[i]);
4305 else if (argv[i][0] == '+')
4306 error ("Invalid option `%s'", argv[i]);
4311 /* Checker uses the frame pointer. */
4312 if (flag_check_memory_usage)
4313 flag_omit_frame_pointer = 0;
4315 /* Initialize for bytecode output. A good idea to do this as soon as
4316 possible after the "-f" options have been parsed. */
4317 if (output_bytecode)
4319 #ifndef TARGET_SUPPORTS_BYTECODE
4320 /* Just die with a fatal error if not supported */
4321 fatal ("-fbytecode not supported for this target");
4329 /* Inlining does not work if not optimizing,
4330 so force it not to be done. */
4334 /* The c_decode_option and lang_decode_option functions set
4335 this to `2' if -Wall is used, so we can avoid giving out
4336 lots of errors for people who don't realize what -Wall does. */
4337 if (warn_uninitialized == 1)
4338 warning ("-Wuninitialized is not supported without -O");
4341 #ifdef OVERRIDE_OPTIONS
4342 /* Some machines may reject certain combinations of options. */
4346 if (exceptions_via_longjmp == 2)
4348 #ifdef DWARF2_UNWIND_INFO
4349 exceptions_via_longjmp = ! DWARF2_UNWIND_INFO;
4351 exceptions_via_longjmp = 1;
4355 if (profile_block_flag == 3)
4357 warning ("`-ax' and `-a' are conflicting options. `-a' ignored.");
4358 profile_block_flag = 2;
4361 /* Unrolling all loops implies that standard loop unrolling must also
4363 if (flag_unroll_all_loops)
4364 flag_unroll_loops = 1;
4365 /* Loop unrolling requires that strength_reduction be on also. Silently
4366 turn on strength reduction here if it isn't already on. Also, the loop
4367 unrolling code assumes that cse will be run after loop, so that must
4368 be turned on also. */
4369 if (flag_unroll_loops)
4371 flag_strength_reduce = 1;
4372 flag_rerun_cse_after_loop = 1;
4375 /* Warn about options that are not supported on this machine. */
4376 #ifndef INSN_SCHEDULING
4377 if (flag_schedule_insns || flag_schedule_insns_after_reload)
4378 warning ("instruction scheduling not supported on this target machine");
4381 if (flag_delayed_branch)
4382 warning ("this target machine does not have delayed branches");
4385 /* If we are in verbose mode, write out the version and maybe all the
4386 option flags in use. */
4389 print_version (stderr, "");
4391 print_switch_values (stderr, 0, MAX_LINE, "", " ", "\n");
4394 compile_file (filename);
4396 #if !defined(OS2) && !defined(VMS) && (!defined(_WIN32) || defined (__CYGWIN32__))
4399 char *lim = (char *) sbrk (0);
4401 fprintf (stderr, "Data size %d.\n",
4402 lim - (char *) &environ);
4406 system ("ps -l 1>&2");
4409 #endif /* not USG */
4411 #endif /* ! OS2 && ! VMS && (! _WIN32 || CYGWIN32) */
4414 exit (FATAL_EXIT_CODE);
4416 exit (FATAL_EXIT_CODE);
4417 exit (SUCCESS_EXIT_CODE);
4421 /* Decode -m switches. */
4423 /* Here is a table, controlled by the tm.h file, listing each -m switch
4424 and which bits in `target_switches' it should set or clear.
4425 If VALUE is positive, it is bits to set.
4426 If VALUE is negative, -VALUE is bits to clear.
4427 (The sign bit is not used so there is no confusion.) */
4429 struct {char *name; int value;} target_switches []
4432 /* This table is similar, but allows the switch to have a value. */
4434 #ifdef TARGET_OPTIONS
4435 struct {char *prefix; char ** variable;} target_options []
4439 /* Decode the switch -mNAME. */
4442 set_target_switch (name)
4448 for (j = 0; j < sizeof target_switches / sizeof target_switches[0]; j++)
4449 if (!strcmp (target_switches[j].name, name))
4451 if (target_switches[j].value < 0)
4452 target_flags &= ~-target_switches[j].value;
4454 target_flags |= target_switches[j].value;
4458 #ifdef TARGET_OPTIONS
4460 for (j = 0; j < sizeof target_options / sizeof target_options[0]; j++)
4462 int len = strlen (target_options[j].prefix);
4463 if (!strncmp (target_options[j].prefix, name, len))
4465 *target_options[j].variable = name + len;
4472 error ("Invalid option `%s'", name);
4475 /* Print version information to FILE.
4476 Each line begins with INDENT (for the case where FILE is the
4477 assembler output file). */
4480 print_version (file, indent)
4484 fprintf (file, "%s%s%s version %s", indent, *indent != 0 ? " " : "",
4485 language_string, version_string);
4486 fprintf (file, " (%s)", TARGET_NAME);
4489 #define __VERSION__ "[unknown]"
4491 fprintf (file, " compiled by GNU C version %s.\n", __VERSION__);
4493 fprintf (file, " compiled by CC.\n");
4497 /* Print an option value and return the adjusted position in the line.
4498 ??? We don't handle error returns from fprintf (disk full); presumably
4499 other code will catch a disk full though. */
4502 print_single_switch (file, pos, max, indent, sep, term, type, name)
4505 char *indent, *sep, *term, *type, *name;
4507 /* The ultrix fprintf returns 0 on success, so compute the result we want
4508 here since we need it for the following test. */
4509 int len = strlen (sep) + strlen (type) + strlen (name);
4514 fprintf (file, "%s", term);
4519 fprintf (file, "%s", indent);
4520 pos = strlen (indent);
4522 fprintf (file, "%s%s%s", sep, type, name);
4527 /* Print active target switches to FILE.
4528 POS is the current cursor position and MAX is the size of a "line".
4529 Each line begins with INDENT and ends with TERM.
4530 Each switch is separated from the next by SEP. */
4533 print_switch_values (file, pos, max, indent, sep, term)
4536 char *indent, *sep, *term;
4541 /* Print the options as passed. */
4543 pos = print_single_switch (file, pos, max, indent, *indent ? " " : "", term,
4544 "options passed: ", "");
4546 for (p = &save_argv[1]; *p != NULL; p++)
4550 if (strcmp (*p, "-o") == 0)
4556 if (strcmp (*p, "-quiet") == 0)
4558 if (strcmp (*p, "-version") == 0)
4563 pos = print_single_switch (file, pos, max, indent, sep, term, *p, "");
4566 fprintf (file, "%s", term);
4568 /* Print the -f and -m options that have been enabled.
4569 We don't handle language specific options but printing argv
4572 pos = print_single_switch (file, 0, max, indent, *indent ? " " : "", term,
4573 "options enabled: ", "");
4575 for (j = 0; j < sizeof f_options / sizeof f_options[0]; j++)
4576 if (*f_options[j].variable == f_options[j].on_value)
4577 pos = print_single_switch (file, pos, max, indent, sep, term,
4578 "-f", f_options[j].string);
4580 /* Print target specific options. */
4582 flags = target_flags;
4583 for (j = 0; j < sizeof target_switches / sizeof target_switches[0]; j++)
4584 if (target_switches[j].name[0] != '\0'
4585 && target_switches[j].value > 0
4586 && ((target_switches[j].value & target_flags)
4587 == target_switches[j].value))
4589 pos = print_single_switch (file, pos, max, indent, sep, term,
4590 "-m", target_switches[j].name);
4591 flags &= ~ target_switches[j].value;
4594 #ifdef TARGET_OPTIONS
4595 for (j = 0; j < sizeof target_options / sizeof target_options[0]; j++)
4596 if (*target_options[j].variable != NULL)
4599 sprintf (prefix, "-m%s", target_options[j].prefix);
4600 pos = print_single_switch (file, pos, max, indent, sep, term,
4601 prefix, *target_options[j].variable);
4605 fprintf (file, "%s", term);
4608 /* Record the beginning of a new source file, named FILENAME. */
4611 debug_start_source_file (filename)
4612 register char *filename;
4614 #ifdef DBX_DEBUGGING_INFO
4615 if (write_symbols == DBX_DEBUG)
4616 dbxout_start_new_source_file (filename);
4618 #ifdef DWARF_DEBUGGING_INFO
4619 if (debug_info_level == DINFO_LEVEL_VERBOSE
4620 && write_symbols == DWARF_DEBUG)
4621 dwarfout_start_new_source_file (filename);
4622 #endif /* DWARF_DEBUGGING_INFO */
4623 #ifdef DWARF2_DEBUGGING_INFO
4624 if (debug_info_level == DINFO_LEVEL_VERBOSE
4625 && write_symbols == DWARF2_DEBUG)
4626 dwarf2out_start_source_file (filename);
4627 #endif /* DWARF2_DEBUGGING_INFO */
4628 #ifdef SDB_DEBUGGING_INFO
4629 if (write_symbols == SDB_DEBUG)
4630 sdbout_start_new_source_file (filename);
4634 /* Record the resumption of a source file. LINENO is the line number in
4635 the source file we are returning to. */
4638 debug_end_source_file (lineno)
4639 register unsigned lineno;
4641 #ifdef DBX_DEBUGGING_INFO
4642 if (write_symbols == DBX_DEBUG)
4643 dbxout_resume_previous_source_file ();
4645 #ifdef DWARF_DEBUGGING_INFO
4646 if (debug_info_level == DINFO_LEVEL_VERBOSE
4647 && write_symbols == DWARF_DEBUG)
4648 dwarfout_resume_previous_source_file (lineno);
4649 #endif /* DWARF_DEBUGGING_INFO */
4650 #ifdef DWARF2_DEBUGGING_INFO
4651 if (debug_info_level == DINFO_LEVEL_VERBOSE
4652 && write_symbols == DWARF2_DEBUG)
4653 dwarf2out_end_source_file ();
4654 #endif /* DWARF2_DEBUGGING_INFO */
4655 #ifdef SDB_DEBUGGING_INFO
4656 if (write_symbols == SDB_DEBUG)
4657 sdbout_resume_previous_source_file ();
4661 /* Called from check_newline in c-parse.y. The `buffer' parameter contains
4662 the tail part of the directive line, i.e. the part which is past the
4663 initial whitespace, #, whitespace, directive-name, whitespace part. */
4666 debug_define (lineno, buffer)
4667 register unsigned lineno;
4668 register char *buffer;
4670 #ifdef DWARF_DEBUGGING_INFO
4671 if (debug_info_level == DINFO_LEVEL_VERBOSE
4672 && write_symbols == DWARF_DEBUG)
4673 dwarfout_define (lineno, buffer);
4674 #endif /* DWARF_DEBUGGING_INFO */
4675 #ifdef DWARF2_DEBUGGING_INFO
4676 if (debug_info_level == DINFO_LEVEL_VERBOSE
4677 && write_symbols == DWARF2_DEBUG)
4678 dwarf2out_define (lineno, buffer);
4679 #endif /* DWARF2_DEBUGGING_INFO */
4682 /* Called from check_newline in c-parse.y. The `buffer' parameter contains
4683 the tail part of the directive line, i.e. the part which is past the
4684 initial whitespace, #, whitespace, directive-name, whitespace part. */
4687 debug_undef (lineno, buffer)
4688 register unsigned lineno;
4689 register char *buffer;
4691 #ifdef DWARF_DEBUGGING_INFO
4692 if (debug_info_level == DINFO_LEVEL_VERBOSE
4693 && write_symbols == DWARF_DEBUG)
4694 dwarfout_undef (lineno, buffer);
4695 #endif /* DWARF_DEBUGGING_INFO */
4696 #ifdef DWARF2_DEBUGGING_INFO
4697 if (debug_info_level == DINFO_LEVEL_VERBOSE
4698 && write_symbols == DWARF2_DEBUG)
4699 dwarf2out_undef (lineno, buffer);
4700 #endif /* DWARF2_DEBUGGING_INFO */