1 /* Top level of GNU C compiler
2 Copyright (C) 1987, 1988, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
3 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
5 This file is part of GCC.
7 GCC is free software; you can redistribute it and/or modify it under
8 the terms of the GNU General Public License as published by the Free
9 Software Foundation; either version 2, or (at your option) any later
12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
17 You should have received a copy of the GNU General Public License
18 along with GCC; see the file COPYING. If not, write to the Free
19 Software Foundation, 59 Temple Place - Suite 330, Boston, MA
22 /* This is the top level of cc1/c++.
23 It parses command args, opens files, invokes the various passes
24 in the proper order, and counts the time used by each.
25 Error messages and low-level interface to malloc also handled here. */
28 #undef FLOAT /* This is for hpux. They should change hpux. */
29 #undef FFS /* Some systems define this in param.h. */
33 #ifdef HAVE_SYS_RESOURCE_H
34 # include <sys/resource.h>
37 #ifdef HAVE_SYS_TIMES_H
38 # include <sys/times.h>
46 #include "insn-attr.h"
47 #include "insn-config.h"
48 #include "insn-flags.h"
49 #include "hard-reg-set.h"
56 #include "basic-block.h"
63 #include "diagnostic.h"
67 #include "dwarf2asm.h"
68 #include "integrate.h"
71 #include "langhooks.h"
73 #if defined (DWARF2_UNWIND_INFO) || defined (DWARF2_DEBUGGING_INFO)
74 #include "dwarf2out.h"
77 #if defined(DBX_DEBUGGING_INFO) || defined(XCOFF_DEBUGGING_INFO)
81 #ifdef SDB_DEBUGGING_INFO
85 #ifdef XCOFF_DEBUGGING_INFO
86 #include "xcoffout.h" /* Needed for external data
87 declarations for e.g. AIX 4.x. */
94 /* Carry information from ASM_DECLARE_OBJECT_NAME
95 to ASM_FINISH_DECLARE_OBJECT. */
97 extern int size_directive_output;
98 extern tree last_assemble_variable_decl;
100 static void general_init PARAMS ((char *));
101 static void parse_options_and_default_flags PARAMS ((int, char **));
102 static void do_compile PARAMS ((void));
103 static void process_options PARAMS ((void));
104 static void lang_independent_init PARAMS ((void));
105 static int lang_dependent_init PARAMS ((const char *));
106 static void init_asm_output PARAMS ((const char *));
107 static void finalize PARAMS ((void));
109 static void set_target_switch PARAMS ((const char *));
111 static void crash_signal PARAMS ((int)) ATTRIBUTE_NORETURN;
112 static void compile_file PARAMS ((void));
113 static void display_help PARAMS ((void));
114 static void display_target_options PARAMS ((void));
116 static void decode_d_option PARAMS ((const char *));
117 static int decode_f_option PARAMS ((const char *));
118 static int decode_W_option PARAMS ((const char *));
119 static int decode_g_option PARAMS ((const char *));
120 static unsigned int independent_decode_option PARAMS ((int, char **));
122 static void print_version PARAMS ((FILE *, const char *));
123 static int print_single_switch PARAMS ((FILE *, int, int, const char *,
124 const char *, const char *,
125 const char *, const char *));
126 static void print_switch_values PARAMS ((FILE *, int, int, const char *,
127 const char *, const char *));
129 /* Length of line when printing switch values. */
132 /* Name of program invoked, sans directories. */
134 const char *progname;
136 /* Copy of arguments to toplev_main. */
140 /* Name of current original source file (what was input to cpp).
141 This comes from each #-command in the actual input. */
143 const char *input_filename;
145 /* Name of top-level original source file (what was input to cpp).
146 This comes from the #-command at the beginning of the actual input.
147 If there isn't any there, then this is the cc1 input file name. */
149 const char *main_input_filename;
151 /* Current line number in real source file. */
155 /* Nonzero if it is unsafe to create any new pseudo registers. */
158 /* Stack of currently pending input files. */
160 struct file_stack *input_file_stack;
162 /* Incremented on each change to input_file_stack. */
163 int input_file_stack_tick;
165 /* Name to use as base of names for dump output files. */
167 const char *dump_base_name;
169 /* Format to use to print dumpfile index value */
170 #ifndef DUMPFILE_FORMAT
171 #define DUMPFILE_FORMAT ".%02d."
174 /* Bit flags that specify the machine subtype we are compiling for.
175 Bits are tested using macros TARGET_... defined in the tm.h file
176 and set by `-m...' switches. Must be defined in rtlanal.c. */
178 extern int target_flags;
180 /* Debug hooks - dependent upon command line options. */
182 const struct gcc_debug_hooks *debug_hooks = &do_nothing_debug_hooks;
184 /* Describes a dump file. */
186 struct dump_file_info
188 /* The unique extension to apply, e.g. ".jump". */
189 const char *const extension;
191 /* The -d<c> character that enables this dump file. */
192 char const debug_switch;
194 /* True if there is a corresponding graph dump file. */
195 char const graph_dump_p;
197 /* True if the user selected this dump. */
200 /* True if the files have been initialized (ie truncated). */
204 /* Enumerate the extant dump files. */
244 /* Describes all the dump files. Should be kept in order of the
245 pass and in sync with dump_file_index above.
247 Remaining -d letters:
253 static struct dump_file_info dump_file[DFI_MAX] =
255 { "rtl", 'r', 0, 0, 0 },
256 { "sibling", 'i', 0, 0, 0 },
257 { "eh", 'h', 0, 0, 0 },
258 { "jump", 'j', 0, 0, 0 },
259 { "ssa", 'e', 1, 0, 0 },
260 { "ssaccp", 'W', 1, 0, 0 },
261 { "ssadce", 'X', 1, 0, 0 },
262 { "ussa", 'e', 1, 0, 0 }, /* Yes, duplicate enable switch. */
263 { "null", 'u', 0, 0, 0 },
264 { "cse", 's', 0, 0, 0 },
265 { "addressof", 'F', 0, 0, 0 },
266 { "gcse", 'G', 1, 0, 0 },
267 { "loop", 'L', 1, 0, 0 },
268 { "cfg", 'f', 1, 0, 0 },
269 { "bp", 'b', 1, 0, 0 },
270 { "cse2", 't', 1, 0, 0 },
271 { "life", 'f', 1, 0, 0 }, /* Yes, duplicate enable switch. */
272 { "combine", 'c', 1, 0, 0 },
273 { "ce", 'C', 1, 0, 0 },
274 { "regmove", 'N', 1, 0, 0 },
275 { "sched", 'S', 1, 0, 0 },
276 { "lreg", 'l', 1, 0, 0 },
277 { "greg", 'g', 1, 0, 0 },
278 { "postreload", 'o', 1, 0, 0 },
279 { "flow2", 'w', 1, 0, 0 },
280 { "peephole2", 'z', 1, 0, 0 },
281 { "rnreg", 'n', 1, 0, 0 },
282 { "ce2", 'E', 1, 0, 0 },
283 { "sched2", 'R', 1, 0, 0 },
284 { "stack", 'k', 1, 0, 0 },
285 { "bbro", 'B', 1, 0, 0 },
286 { "mach", 'M', 1, 0, 0 },
287 { "dbr", 'd', 0, 0, 0 },
290 static int open_dump_file PARAMS ((enum dump_file_index, tree));
291 static void close_dump_file PARAMS ((enum dump_file_index,
292 void (*) (FILE *, rtx), rtx));
294 /* Other flags saying which kinds of debugging dump have been requested. */
296 int rtl_dump_and_exit;
297 int flag_print_asm_name;
298 static int version_flag;
299 static char *filename;
300 enum graph_dump_types graph_dump_format;
302 /* Name for output file of assembly code, specified with -o. */
306 /* Value of the -G xx switch, and whether it was passed or not. */
310 /* Type(s) of debugging information we are producing (if any).
311 See flags.h for the definitions of the different possible
312 types of debugging information. */
313 enum debug_info_type write_symbols = NO_DEBUG;
315 /* Level of debugging information we are producing. See flags.h
316 for the definitions of the different possible levels. */
317 enum debug_info_level debug_info_level = DINFO_LEVEL_NONE;
319 /* Nonzero means use GNU-only extensions in the generated symbolic
320 debugging information. */
321 /* Currently, this only has an effect when write_symbols is set to
322 DBX_DEBUG, XCOFF_DEBUG, or DWARF_DEBUG. */
323 int use_gnu_debug_info_extensions = 0;
325 /* Nonzero means do optimizations. -O.
326 Particular numeric values stand for particular amounts of optimization;
327 thus, -O2 stores 2 here. However, the optimizations beyond the basic
328 ones are not controlled directly by this variable. Instead, they are
329 controlled by individual `flag_...' variables that are defaulted
330 based on this variable. */
334 /* Nonzero means optimize for size. -Os.
335 The only valid values are zero and non-zero. When optimize_size is
336 non-zero, optimize defaults to 2, but certain individual code
337 bloating optimizations are disabled. */
339 int optimize_size = 0;
341 /* Nonzero if we should exit after parsing options. */
342 static int exit_after_options = 0;
344 /* The FUNCTION_DECL for the function currently being compiled,
345 or 0 if between functions. */
346 tree current_function_decl;
348 /* Set to the FUNC_BEGIN label of the current function, or NULL_TREE
350 tree current_function_func_begin_label;
352 /* Nonzero if doing dwarf2 duplicate elimination. */
354 int flag_eliminate_dwarf2_dups = 0;
356 /* Nonzero if generating code to do profiling. */
358 int profile_flag = 0;
360 /* Nonzero if generating code to profile program flow graph arcs. */
362 int profile_arc_flag = 0;
364 /* Nonzero if generating info for gcov to calculate line test coverage. */
366 int flag_test_coverage = 0;
368 /* Nonzero indicates that branch taken probabilities should be calculated. */
370 int flag_branch_probabilities = 0;
372 /* Nonzero if basic blocks should be reordered. */
374 int flag_reorder_blocks = 0;
376 /* Nonzero if registers should be renamed. */
378 int flag_rename_registers = 0;
379 int flag_cprop_registers = 0;
381 /* Nonzero for -pedantic switch: warn about anything
382 that standard spec forbids. */
386 /* Temporarily suppress certain warnings.
387 This is set while reading code from a system header file. */
389 int in_system_header = 0;
391 /* Don't print functions as they are compiled. -quiet. */
395 /* Print times taken by the various passes. -ftime-report. */
399 /* Print memory still in use at end of compilation (which may have little
400 to do with peak memory consumption). -fmem-report. */
404 /* Non-zero means to collect statistics which might be expensive
405 and to print them when we are done. */
406 int flag_detailed_statistics = 0;
411 /* Nonzero means `char' should be signed. */
413 int flag_signed_char;
415 /* Nonzero means give an enum type only as many bytes as it needs. */
417 int flag_short_enums;
419 /* Nonzero for -fcaller-saves: allocate values in regs that need to
420 be saved across function calls, if that produces overall better code.
421 Optional now, so people can test it. */
423 #ifdef DEFAULT_CALLER_SAVES
424 int flag_caller_saves = 1;
426 int flag_caller_saves = 0;
429 /* Nonzero if structures and unions should be returned in memory.
431 This should only be defined if compatibility with another compiler or
432 with an ABI is needed, because it results in slower code. */
434 #ifndef DEFAULT_PCC_STRUCT_RETURN
435 #define DEFAULT_PCC_STRUCT_RETURN 1
438 /* Nonzero for -fpcc-struct-return: return values the same way PCC does. */
440 int flag_pcc_struct_return = DEFAULT_PCC_STRUCT_RETURN;
442 /* Nonzero for -fforce-mem: load memory value into a register
443 before arithmetic on it. This makes better cse but slower compilation. */
445 int flag_force_mem = 0;
447 /* Nonzero for -fforce-addr: load memory address into a register before
448 reference to memory. This makes better cse but slower compilation. */
450 int flag_force_addr = 0;
452 /* Nonzero for -fdefer-pop: don't pop args after each function call;
453 instead save them up to pop many calls' args with one insns. */
455 int flag_defer_pop = 0;
457 /* Nonzero for -ffloat-store: don't allocate floats and doubles
458 in extended-precision registers. */
460 int flag_float_store = 0;
462 /* Nonzero for -fcse-follow-jumps:
463 have cse follow jumps to do a more extensive job. */
465 int flag_cse_follow_jumps;
467 /* Nonzero for -fcse-skip-blocks:
468 have cse follow a branch around a block. */
469 int flag_cse_skip_blocks;
471 /* Nonzero for -fexpensive-optimizations:
472 perform miscellaneous relatively-expensive optimizations. */
473 int flag_expensive_optimizations;
475 /* Nonzero for -fthread-jumps:
476 have jump optimize output of loop. */
478 int flag_thread_jumps;
480 /* Nonzero enables strength-reduction in loop.c. */
482 int flag_strength_reduce = 0;
484 /* Nonzero enables loop unrolling in unroll.c. Only loops for which the
485 number of iterations can be calculated at compile-time (UNROLL_COMPLETELY,
486 UNROLL_MODULO) or at run-time (preconditioned to be UNROLL_MODULO) are
489 int flag_unroll_loops;
491 /* Nonzero enables loop unrolling in unroll.c. All loops are unrolled.
492 This is generally not a win. */
494 int flag_unroll_all_loops;
496 /* Nonzero enables prefetch optimizations for arrays in loops. */
498 int flag_prefetch_loop_arrays;
500 /* Nonzero forces all invariant computations in loops to be moved
503 int flag_move_all_movables = 0;
505 /* Nonzero forces all general induction variables in loops to be
508 int flag_reduce_all_givs = 0;
510 /* Nonzero to perform full register move optimization passes. This is the
513 int flag_regmove = 0;
515 /* Nonzero for -fwritable-strings:
516 store string constants in data segment and don't uniquize them. */
518 int flag_writable_strings = 0;
520 /* Nonzero means don't put addresses of constant functions in registers.
521 Used for compiling the Unix kernel, where strange substitutions are
522 done on the assembly output. */
524 int flag_no_function_cse = 0;
526 /* Nonzero for -fomit-frame-pointer:
527 don't make a frame pointer in simple functions that don't require one. */
529 int flag_omit_frame_pointer = 0;
531 /* Nonzero means place each function into its own section on those platforms
532 which support arbitrary section names and unlimited numbers of sections. */
534 int flag_function_sections = 0;
536 /* ... and similar for data. */
538 int flag_data_sections = 0;
540 /* Nonzero to inhibit use of define_optimization peephole opts. */
542 int flag_no_peephole = 0;
544 /* Nonzero allows GCC to optimize sibling and tail recursive calls. */
546 int flag_optimize_sibling_calls = 0;
548 /* Nonzero means the front end generally wants `errno' maintained by math
549 operations, like built-in SQRT. */
551 int flag_errno_math = 1;
553 /* Nonzero means that unsafe floating-point math optimizations are allowed
554 for the sake of speed. IEEE compliance is not guaranteed, and operations
555 are allowed to assume that their arguments and results are "normal"
556 (e.g., nonnegative for SQRT). */
558 int flag_unsafe_math_optimizations = 0;
560 /* Zero means that floating-point math operations cannot generate a
561 (user-visible) trap. This is the case, for example, in nonstop
562 IEEE 754 arithmetic. */
564 int flag_trapping_math = 1;
566 /* 0 means straightforward implementation of complex divide acceptable.
567 1 means wide ranges of inputs must work for complex divide.
568 2 means C99-like requirements for complex divide (not yet implemented). */
570 int flag_complex_divide_method = 0;
572 /* Nonzero means all references through pointers are volatile. */
576 /* Nonzero means treat all global and extern variables as volatile. */
578 int flag_volatile_global;
580 /* Nonzero means treat all static variables as volatile. */
582 int flag_volatile_static;
584 /* Nonzero means just do syntax checking; don't output anything. */
586 int flag_syntax_only = 0;
588 /* Nonzero means perform global cse. */
590 static int flag_gcse;
592 /* Nonzero means perform loop optimizer. */
594 static int flag_loop_optimize;
596 /* Nonzero means perform crossjumping. */
598 static int flag_crossjumping;
600 /* Nonzero means to use global dataflow analysis to eliminate
601 useless null pointer tests. */
603 static int flag_delete_null_pointer_checks;
605 /* Nonzero means to do the enhanced load motion during gcse, which trys
606 to hoist loads by not killing them when a store to the same location
609 int flag_gcse_lm = 1;
611 /* Nonzero means to perform store motion after gcse, which will try to
612 move stores closer to the exit block. Its not very effective without
615 int flag_gcse_sm = 1;
617 /* Nonzero means to rerun cse after loop optimization. This increases
618 compilation time about 20% and picks up a few more common expressions. */
620 static int flag_rerun_cse_after_loop;
622 /* Nonzero means to run loop optimizations twice. */
624 int flag_rerun_loop_opt;
626 /* Nonzero for -finline-functions: ok to inline functions that look like
627 good inline candidates. */
629 int flag_inline_functions;
631 /* Nonzero for -fkeep-inline-functions: even if we make a function
632 go inline everywhere, keep its definition around for debugging
635 int flag_keep_inline_functions;
637 /* Nonzero means that functions will not be inlined. */
639 int flag_no_inline = 2;
641 /* Nonzero means that we don't want inlining by virtue of -fno-inline,
642 not just because the tree inliner turned us off. */
644 int flag_really_no_inline = 2;
646 /* Nonzero means that we should emit static const variables
647 regardless of whether or not optimization is turned on. */
649 int flag_keep_static_consts = 1;
651 /* Nonzero means we should be saving declaration info into a .X file. */
653 int flag_gen_aux_info = 0;
655 /* Specified name of aux-info file. */
657 static char *aux_info_file_name;
659 /* Nonzero means make the text shared if supported. */
661 int flag_shared_data;
663 /* Nonzero means schedule into delayed branch slots if supported. */
665 int flag_delayed_branch;
667 /* Nonzero if we are compiling pure (sharable) code.
668 Value is 1 if we are doing reasonable (i.e. simple
669 offset into offset table) pic. Value is 2 if we can
670 only perform register offsets. */
674 /* Nonzero means generate extra code for exception handling and enable
675 exception handling. */
679 /* Nonzero means generate frame unwind info table when supported. */
681 int flag_unwind_tables = 0;
683 /* Nonzero means generate frame unwind info table exact at each insn boundary */
685 int flag_asynchronous_unwind_tables = 0;
687 /* Nonzero means don't place uninitialized global data in common storage
692 /* Nonzero means change certain warnings into errors.
693 Usually these are warnings about failure to conform to some standard. */
695 int flag_pedantic_errors = 0;
697 /* flag_schedule_insns means schedule insns within basic blocks (before
699 flag_schedule_insns_after_reload means schedule insns after
702 int flag_schedule_insns = 0;
703 int flag_schedule_insns_after_reload = 0;
705 /* The following flags have effect only for scheduling before register
708 flag_schedule_interblock means schedule insns accross basic blocks.
709 flag_schedule_speculative means allow speculative motion of non-load insns.
710 flag_schedule_speculative_load means allow speculative motion of some
712 flag_schedule_speculative_load_dangerous allows speculative motion of more
715 int flag_schedule_interblock = 1;
716 int flag_schedule_speculative = 1;
717 int flag_schedule_speculative_load = 0;
718 int flag_schedule_speculative_load_dangerous = 0;
720 int flag_single_precision_constant;
722 /* flag_branch_on_count_reg means try to replace add-1,compare,branch tupple
723 by a cheaper branch on a count register. */
724 int flag_branch_on_count_reg = 1;
726 /* -finhibit-size-directive inhibits output of .size for ELF.
727 This is used only for compiling crtstuff.c,
728 and it may be extended to other effects
729 needed for crtstuff.c on other systems. */
730 int flag_inhibit_size_directive = 0;
732 /* -fverbose-asm causes extra commentary information to be produced in
733 the generated assembly code (to make it more readable). This option
734 is generally only of use to those who actually need to read the
735 generated assembly code (perhaps while debugging the compiler itself).
736 -fno-verbose-asm, the default, causes the extra information
737 to be omitted and is useful when comparing two assembler files. */
739 int flag_verbose_asm = 0;
741 /* -dA causes debug commentary information to be produced in
742 the generated assembly code (to make it more readable). This option
743 is generally only of use to those who actually need to read the
744 generated assembly code (perhaps while debugging the compiler itself).
745 Currently, this switch is only used by dwarfout.c; however, it is intended
746 to be a catchall for printing debug information in the assembler file. */
748 int flag_debug_asm = 0;
750 /* -dP causes the rtl to be emitted as a comment in assembly. */
752 int flag_dump_rtl_in_asm = 0;
754 /* -fgnu-linker specifies use of the GNU linker for initializations.
755 (Or, more generally, a linker that handles initializations.)
756 -fno-gnu-linker says that collect2 will be used. */
758 int flag_gnu_linker = 0;
760 int flag_gnu_linker = 1;
763 /* Nonzero means put zero initialized data in the bss section. */
764 int flag_zero_initialized_in_bss = 1;
769 /* Enable ssa conditional constant propagation. */
770 int flag_ssa_ccp = 0;
772 /* Enable ssa aggressive dead code elimination. */
773 int flag_ssa_dce = 0;
775 /* Tag all structures with __attribute__(packed). */
776 int flag_pack_struct = 0;
778 /* Emit code to check for stack overflow; also may cause large objects
779 to be allocated dynamically. */
780 int flag_stack_check;
782 /* When non-NULL, indicates that whenever space is allocated on the
783 stack, the resulting stack pointer must not pass this
784 address---that is, for stacks that grow downward, the stack pointer
785 must always be greater than or equal to this address; for stacks
786 that grow upward, the stack pointer must be less than this address.
787 At present, the rtx may be either a REG or a SYMBOL_REF, although
788 the support provided depends on the backend. */
791 /* 0 if pointer arguments may alias each other. True in C.
792 1 if pointer arguments may not alias each other but may alias
794 2 if pointer arguments may not alias each other and may not
795 alias global variables. True in Fortran.
796 This defaults to 0 for C. */
797 int flag_argument_noalias = 0;
799 /* Nonzero if we should do (language-dependent) alias analysis.
800 Typically, this analysis will assume that expressions of certain
801 types do not alias expressions of certain other types. Only used
802 if alias analysis (in general) is enabled. */
803 int flag_strict_aliasing = 0;
805 /* Instrument functions with calls at entry and exit, for profiling. */
806 int flag_instrument_function_entry_exit = 0;
808 /* Nonzero means ignore `#ident' directives. 0 means handle them.
809 On SVR4 targets, it also controls whether or not to emit a
810 string identifying the compiler. */
812 int flag_no_ident = 0;
814 /* This will perform a peephole pass before sched2. */
815 int flag_peephole2 = 0;
817 /* This will try to guess branch probabilities. */
818 int flag_guess_branch_prob = 0;
820 /* -fbounded-pointers causes gcc to compile pointers as composite
821 objects occupying three words: the pointer value, the base address
822 of the referent object, and the address immediately beyond the end
823 of the referent object. The base and extent allow us to perform
824 runtime bounds checking. -fbounded-pointers implies -fcheck-bounds. */
825 int flag_bounded_pointers = 0;
827 /* -fcheck-bounds causes gcc to generate array bounds checks.
828 For C, C++: defaults to value of flag_bounded_pointers.
829 For ObjC: defaults to off.
830 For Java: defaults to on.
831 For Fortran: defaults to off.
832 For CHILL: defaults to off. */
833 int flag_bounds_check = 0;
835 /* This will attempt to merge constant section constants, if 1 only
836 string constants and constants from constant pool, if 2 also constant
838 int flag_merge_constants = 1;
840 /* If one, renumber instruction UIDs to reduce the number of
841 unused UIDs if there are a lot of instructions. If greater than
842 one, unconditionally renumber instruction UIDs. */
843 int flag_renumber_insns = 1;
845 /* Values of the -falign-* flags: how much to align labels in code.
846 0 means `use default', 1 means `don't align'.
847 For each variable, there is an _log variant which is the power
848 of two not less than the variable, for .align output. */
852 int align_loops_max_skip;
855 int align_jumps_max_skip;
857 int align_labels_log;
858 int align_labels_max_skip;
860 int align_functions_log;
862 /* Table of supported debugging formats. */
865 const char *const arg;
866 /* Since PREFERRED_DEBUGGING_TYPE isn't necessarily a
867 constant expression, we use NO_DEBUG in its place. */
868 const enum debug_info_type debug_type;
869 const int use_extensions_p;
870 const char *const description;
874 { "", NO_DEBUG, DEFAULT_GDB_EXTENSIONS,
875 N_("Generate debugging info in default format") },
876 { "gdb", NO_DEBUG, 1, N_("Generate debugging info in default extended format") },
877 #ifdef DBX_DEBUGGING_INFO
878 { "stabs", DBX_DEBUG, 0, N_("Generate STABS format debug info") },
879 { "stabs+", DBX_DEBUG, 1, N_("Generate extended STABS format debug info") },
881 #ifdef DWARF_DEBUGGING_INFO
882 { "dwarf", DWARF_DEBUG, 0, N_("Generate DWARF-1 format debug info") },
883 { "dwarf+", DWARF_DEBUG, 1,
884 N_("Generate extended DWARF-1 format debug info") },
886 #ifdef DWARF2_DEBUGGING_INFO
887 { "dwarf-2", DWARF2_DEBUG, 0, N_("Generate DWARF-2 debug info") },
889 #ifdef XCOFF_DEBUGGING_INFO
890 { "xcoff", XCOFF_DEBUG, 0, N_("Generate XCOFF format debug info") },
891 { "xcoff+", XCOFF_DEBUG, 1, N_("Generate extended XCOFF format debug info") },
893 #ifdef SDB_DEBUGGING_INFO
894 { "coff", SDB_DEBUG, 0, N_("Generate COFF format debug info") },
896 #ifdef VMS_DEBUGGING_INFO
897 { "vms", VMS_DEBUG, 0, N_("Generate VMS format debug info") },
904 const char *const string;
907 const char *const description;
909 lang_independent_options;
913 /* Add or remove a leading underscore from user symbols. */
914 int flag_leading_underscore = -1;
916 /* The user symbol prefix after having resolved same. */
917 const char *user_label_prefix;
919 static const param_info lang_independent_params[] = {
920 #define DEFPARAM(ENUM, OPTION, HELP, DEFAULT) \
921 { OPTION, DEFAULT, HELP },
922 #include "params.def"
927 /* A default for same. */
928 #ifndef USER_LABEL_PREFIX
929 #define USER_LABEL_PREFIX ""
932 /* Table of language-independent -f options.
933 STRING is the option name. VARIABLE is the address of the variable.
934 ON_VALUE is the value to store in VARIABLE
935 if `-fSTRING' is seen as an option.
936 (If `-fno-STRING' is seen as an option, the opposite value is stored.) */
938 static const lang_independent_options f_options[] =
940 {"eliminate-dwarf2-dups", &flag_eliminate_dwarf2_dups, 1,
941 N_("Perform DWARF2 duplicate elimination") },
942 {"float-store", &flag_float_store, 1,
943 N_("Do not store floats in registers") },
944 {"volatile", &flag_volatile, 1,
945 N_("Consider all mem refs through pointers as volatile") },
946 {"volatile-global", &flag_volatile_global, 1,
947 N_("Consider all mem refs to global data to be volatile") },
948 {"volatile-static", &flag_volatile_static, 1,
949 N_("Consider all mem refs to static data to be volatile") },
950 {"defer-pop", &flag_defer_pop, 1,
951 N_("Defer popping functions args from stack until later") },
952 {"omit-frame-pointer", &flag_omit_frame_pointer, 1,
953 N_("When possible do not generate stack frames") },
954 {"optimize-sibling-calls", &flag_optimize_sibling_calls, 1,
955 N_("Optimize sibling and tail recursive calls") },
956 {"cse-follow-jumps", &flag_cse_follow_jumps, 1,
957 N_("When running CSE, follow jumps to their targets") },
958 {"cse-skip-blocks", &flag_cse_skip_blocks, 1,
959 N_("When running CSE, follow conditional jumps") },
960 {"expensive-optimizations", &flag_expensive_optimizations, 1,
961 N_("Perform a number of minor, expensive optimizations") },
962 {"thread-jumps", &flag_thread_jumps, 1,
963 N_("Perform jump threading optimizations") },
964 {"strength-reduce", &flag_strength_reduce, 1,
965 N_("Perform strength reduction optimizations") },
966 {"unroll-loops", &flag_unroll_loops, 1,
967 N_("Perform loop unrolling when iteration count is known") },
968 {"unroll-all-loops", &flag_unroll_all_loops, 1,
969 N_("Perform loop unrolling for all loops") },
970 {"prefetch-loop-arrays", &flag_prefetch_loop_arrays, 1,
971 N_("Generate prefetch instructions, if available, for arrays in loops") },
972 {"move-all-movables", &flag_move_all_movables, 1,
973 N_("Force all loop invariant computations out of loops") },
974 {"reduce-all-givs", &flag_reduce_all_givs, 1,
975 N_("Strength reduce all loop general induction variables") },
976 {"writable-strings", &flag_writable_strings, 1,
977 N_("Store strings in writable data section") },
978 {"peephole", &flag_no_peephole, 0,
979 N_("Enable machine specific peephole optimizations") },
980 {"force-mem", &flag_force_mem, 1,
981 N_("Copy memory operands into registers before using") },
982 {"force-addr", &flag_force_addr, 1,
983 N_("Copy memory address constants into regs before using") },
984 {"function-cse", &flag_no_function_cse, 0,
985 N_("Allow function addresses to be held in registers") },
986 {"inline-functions", &flag_inline_functions, 1,
987 N_("Integrate simple functions into their callers") },
988 {"keep-inline-functions", &flag_keep_inline_functions, 1,
989 N_("Generate code for funcs even if they are fully inlined") },
990 {"inline", &flag_no_inline, 0,
991 N_("Pay attention to the 'inline' keyword") },
992 {"keep-static-consts", &flag_keep_static_consts, 1,
993 N_("Emit static const variables even if they are not used") },
994 {"syntax-only", &flag_syntax_only, 1,
995 N_("Check for syntax errors, then stop") },
996 {"shared-data", &flag_shared_data, 1,
997 N_("Mark data as shared rather than private") },
998 {"caller-saves", &flag_caller_saves, 1,
999 N_("Enable saving registers around function calls") },
1000 {"pcc-struct-return", &flag_pcc_struct_return, 1,
1001 N_("Return 'short' aggregates in memory, not registers") },
1002 {"reg-struct-return", &flag_pcc_struct_return, 0,
1003 N_("Return 'short' aggregates in registers") },
1004 {"delayed-branch", &flag_delayed_branch, 1,
1005 N_("Attempt to fill delay slots of branch instructions") },
1006 {"gcse", &flag_gcse, 1,
1007 N_("Perform the global common subexpression elimination") },
1008 {"gcse-lm", &flag_gcse_lm, 1,
1009 N_("Perform enhanced load motion during global subexpression elimination") },
1010 {"gcse-sm", &flag_gcse_sm, 1,
1011 N_("Perform store motion after global subexpression elimination") },
1012 {"loop-optimize", &flag_loop_optimize, 1,
1013 N_("Perform the loop optimizations") },
1014 {"crossjumping", &flag_crossjumping, 1,
1015 N_("Perform cross-jumping optimization") },
1016 {"rerun-cse-after-loop", &flag_rerun_cse_after_loop, 1,
1017 N_("Run CSE pass after loop optimizations") },
1018 {"rerun-loop-opt", &flag_rerun_loop_opt, 1,
1019 N_("Run the loop optimizer twice") },
1020 {"delete-null-pointer-checks", &flag_delete_null_pointer_checks, 1,
1021 N_("Delete useless null pointer checks") },
1022 {"schedule-insns", &flag_schedule_insns, 1,
1023 N_("Reschedule instructions before register allocation") },
1024 {"schedule-insns2", &flag_schedule_insns_after_reload, 1,
1025 N_("Reschedule instructions after register allocation") },
1026 {"sched-interblock",&flag_schedule_interblock, 1,
1027 N_("Enable scheduling across basic blocks") },
1028 {"sched-spec",&flag_schedule_speculative, 1,
1029 N_("Allow speculative motion of non-loads") },
1030 {"sched-spec-load",&flag_schedule_speculative_load, 1,
1031 N_("Allow speculative motion of some loads") },
1032 {"sched-spec-load-dangerous",&flag_schedule_speculative_load_dangerous, 1,
1033 N_("Allow speculative motion of more loads") },
1034 {"branch-count-reg",&flag_branch_on_count_reg, 1,
1035 N_("Replace add,compare,branch with branch on count reg") },
1036 {"pic", &flag_pic, 1,
1037 N_("Generate position independent code, if possible") },
1038 {"PIC", &flag_pic, 2, ""},
1039 {"exceptions", &flag_exceptions, 1,
1040 N_("Enable exception handling") },
1041 {"unwind-tables", &flag_unwind_tables, 1,
1042 N_("Just generate unwind tables for exception handling") },
1043 {"asynchronous-unwind-tables", &flag_asynchronous_unwind_tables, 1,
1044 N_("Generate unwind tables exact at each instruction boundary") },
1045 {"non-call-exceptions", &flag_non_call_exceptions, 1,
1046 N_("Support synchronous non-call exceptions") },
1047 {"profile-arcs", &profile_arc_flag, 1,
1048 N_("Insert arc based program profiling code") },
1049 {"test-coverage", &flag_test_coverage, 1,
1050 N_("Create data files needed by gcov") },
1051 {"branch-probabilities", &flag_branch_probabilities, 1,
1052 N_("Use profiling information for branch probabilities") },
1053 {"reorder-blocks", &flag_reorder_blocks, 1,
1054 N_("Reorder basic blocks to improve code placement") },
1055 {"rename-registers", &flag_rename_registers, 1,
1056 N_("Do the register renaming optimization pass") },
1057 {"cprop-registers", &flag_cprop_registers, 1,
1058 N_("Do the register copy-propagation optimization pass") },
1059 {"common", &flag_no_common, 0,
1060 N_("Do not put uninitialized globals in the common section") },
1061 {"inhibit-size-directive", &flag_inhibit_size_directive, 1,
1062 N_("Do not generate .size directives") },
1063 {"function-sections", &flag_function_sections, 1,
1064 N_("place each function into its own section") },
1065 {"data-sections", &flag_data_sections, 1,
1066 N_("place data items into their own section") },
1067 {"verbose-asm", &flag_verbose_asm, 1,
1068 N_("Add extra commentry to assembler output") },
1069 {"gnu-linker", &flag_gnu_linker, 1,
1070 N_("Output GNU ld formatted global initializers") },
1071 {"regmove", &flag_regmove, 1,
1072 N_("Enables a register move optimization") },
1073 {"optimize-register-move", &flag_regmove, 1,
1074 N_("Do the full regmove optimization pass") },
1075 {"pack-struct", &flag_pack_struct, 1,
1076 N_("Pack structure members together without holes") },
1077 {"stack-check", &flag_stack_check, 1,
1078 N_("Insert stack checking code into the program") },
1079 {"argument-alias", &flag_argument_noalias, 0,
1080 N_("Specify that arguments may alias each other & globals") },
1081 {"argument-noalias", &flag_argument_noalias, 1,
1082 N_("Assume arguments may alias globals but not each other") },
1083 {"argument-noalias-global", &flag_argument_noalias, 2,
1084 N_("Assume arguments do not alias each other or globals") },
1085 {"strict-aliasing", &flag_strict_aliasing, 1,
1086 N_("Assume strict aliasing rules apply") },
1087 {"align-loops", &align_loops, 0,
1088 N_("Align the start of loops") },
1089 {"align-jumps", &align_jumps, 0,
1090 N_("Align labels which are only reached by jumping") },
1091 {"align-labels", &align_labels, 0,
1092 N_("Align all labels") },
1093 {"align-functions", &align_functions, 0,
1094 N_("Align the start of functions") },
1095 {"merge-constants", &flag_merge_constants, 1,
1096 N_("Attempt to merge identical constants accross compilation units") },
1097 {"merge-all-constants", &flag_merge_constants, 2,
1098 N_("Attempt to merge identical constants and constant variables") },
1099 {"dump-unnumbered", &flag_dump_unnumbered, 1,
1100 N_("Suppress output of instruction numbers and line number notes in debugging dumps") },
1101 {"instrument-functions", &flag_instrument_function_entry_exit, 1,
1102 N_("Instrument function entry/exit with profiling calls") },
1103 {"zero-initialized-in-bss", &flag_zero_initialized_in_bss, 1,
1104 N_("Put zero initialized data in the bss section") },
1105 {"ssa", &flag_ssa, 1,
1106 N_("Enable SSA optimizations") },
1107 {"ssa-ccp", &flag_ssa_ccp, 1,
1108 N_("Enable SSA conditional constant propagation") },
1109 {"ssa-dce", &flag_ssa_dce, 1,
1110 N_("Enable aggressive SSA dead code elimination") },
1111 {"leading-underscore", &flag_leading_underscore, 1,
1112 N_("External symbols have a leading underscore") },
1113 {"ident", &flag_no_ident, 0,
1114 N_("Process #ident directives") },
1115 { "peephole2", &flag_peephole2, 1,
1116 N_("Enables an rtl peephole pass run before sched2") },
1117 { "guess-branch-probability", &flag_guess_branch_prob, 1,
1118 N_("Enables guessing of branch probabilities") },
1119 {"math-errno", &flag_errno_math, 1,
1120 N_("Set errno after built-in math functions") },
1121 {"trapping-math", &flag_trapping_math, 1,
1122 N_("Floating-point operations can trap") },
1123 {"unsafe-math-optimizations", &flag_unsafe_math_optimizations, 1,
1124 N_("Allow math optimizations that may violate IEEE or ANSI standards") },
1125 {"bounded-pointers", &flag_bounded_pointers, 1,
1126 N_("Compile pointers as triples: value, base & end") },
1127 {"bounds-check", &flag_bounds_check, 1,
1128 N_("Generate code to check bounds before dereferencing pointers and arrays") },
1129 {"single-precision-constant", &flag_single_precision_constant, 1,
1130 N_("Convert floating point constant to single precision constant") },
1131 {"time-report", &time_report, 1,
1132 N_("Report time taken by each compiler pass at end of run") },
1133 {"mem-report", &mem_report, 1,
1134 N_("Report on permanent memory allocation at end of run") },
1135 { "trapv", &flag_trapv, 1,
1136 N_("Trap for signed overflow in addition / subtraction / multiplication") },
1139 /* Table of language-specific options. */
1141 static const struct lang_opt
1143 const char *const option;
1144 const char *const description;
1146 documented_lang_options[] =
1148 /* In order not to overload the --help output, the convention
1149 used here is to only describe those options which are not
1150 enabled by default. */
1153 N_("Compile just for ISO C89") },
1155 N_("Determine language standard") },
1157 { "-fsigned-bitfields", "" },
1158 { "-funsigned-bitfields",
1159 N_("Make bit-fields by unsigned by default") },
1160 { "-fno-signed-bitfields", "" },
1161 { "-fno-unsigned-bitfields","" },
1163 N_("Make 'char' be signed by default") },
1164 { "-funsigned-char",
1165 N_("Make 'char' be unsigned by default") },
1166 { "-fno-signed-char", "" },
1167 { "-fno-unsigned-char", "" },
1171 N_("Do not recognize the 'asm' keyword") },
1172 { "-fbuiltin", "" },
1174 N_("Do not recognize any built in functions") },
1176 N_("Assume normal C execution environment") },
1177 { "-fno-hosted", "" },
1179 N_("Assume that standard libraries & main might not exist") },
1180 { "-fno-freestanding", "" },
1181 { "-fcond-mismatch",
1182 N_("Allow different types as args of ? operator") },
1183 { "-fno-cond-mismatch", "" },
1184 { "-fdollars-in-identifiers",
1185 N_("Allow the use of $ inside identifiers") },
1186 { "-fno-dollars-in-identifiers", "" },
1187 { "-fpreprocessed", "" },
1188 { "-fno-preprocessed", "" },
1190 N_("Use the same size for double as for float") },
1191 { "-fno-short-double", "" },
1193 N_("Use the smallest fitting integer to hold enums") },
1194 { "-fno-short-enums", "" },
1196 N_("Override the underlying type for wchar_t to `unsigned short'") },
1197 { "-fno-short-wchar", "" },
1200 N_("Enable most warning messages") },
1201 { "-Wbad-function-cast",
1202 N_("Warn about casting functions to incompatible types") },
1203 { "-Wno-bad-function-cast", "" },
1204 { "-Wmissing-format-attribute",
1205 N_("Warn about functions which might be candidates for format attributes") },
1206 { "-Wno-missing-format-attribute", "" },
1208 N_("Warn about casts which discard qualifiers") },
1209 { "-Wno-cast-qual", "" },
1210 { "-Wchar-subscripts",
1211 N_("Warn about subscripts whose type is 'char'") },
1212 { "-Wno-char-subscripts", "" },
1214 N_("Warn if nested comments are detected") },
1215 { "-Wno-comment", "" },
1217 N_("Warn if nested comments are detected") },
1218 { "-Wno-comments", "" },
1220 N_("Warn about possibly confusing type conversions") },
1221 { "-Wno-conversion", "" },
1222 { "-Wdiv-by-zero", "" },
1223 { "-Wno-div-by-zero",
1224 N_("Do not warn about compile-time integer division by zero") },
1226 N_("Warn about testing equality of floating point numbers") },
1227 { "-Wno-float-equal", "" },
1229 N_("Warn about printf/scanf/strftime/strfmon format anomalies") },
1230 { "-Wno-format", "" },
1231 { "-Wformat-extra-args", "" },
1232 { "-Wno-format-extra-args",
1233 N_("Don't warn about too many arguments to format functions") },
1234 { "-Wformat-nonliteral",
1235 N_("Warn about non-string-literal format strings") },
1236 { "-Wno-format-nonliteral", "" },
1237 { "-Wformat-security",
1238 N_("Warn about possible security problems with format functions") },
1239 { "-Wno-format-security", "" },
1240 { "-Wformat-y2k", "" },
1241 { "-Wno-format-y2k",
1242 N_("Don't warn about strftime formats yielding 2 digit years") },
1243 { "-Wimplicit-function-declaration",
1244 N_("Warn about implicit function declarations") },
1245 { "-Wno-implicit-function-declaration", "" },
1246 { "-Werror-implicit-function-declaration", "" },
1248 N_("Warn when a declaration does not specify a type") },
1249 { "-Wno-implicit-int", "" },
1250 { "-Wimplicit", "" },
1251 { "-Wno-implicit", "" },
1253 N_("Warn about the use of the #import directive") },
1254 { "-Wno-import", "" },
1255 { "-Wlong-long","" },
1257 N_("Do not warn about using 'long long' when -pedantic") },
1259 N_("Warn about suspicious declarations of main") },
1260 { "-Wno-main", "" },
1261 { "-Wmissing-braces",
1262 N_("Warn about possibly missing braces around initializers") },
1263 { "-Wno-missing-braces", "" },
1264 { "-Wmissing-declarations",
1265 N_("Warn about global funcs without previous declarations") },
1266 { "-Wno-missing-declarations", "" },
1267 { "-Wmissing-prototypes",
1268 N_("Warn about global funcs without prototypes") },
1269 { "-Wno-missing-prototypes", "" },
1271 N_("Warn about use of multicharacter literals") },
1272 { "-Wno-multichar", "" },
1273 { "-Wnested-externs",
1274 N_("Warn about externs not at file scope level") },
1275 { "-Wno-nested-externs", "" },
1277 N_("Warn about possible missing parentheses") },
1278 { "-Wno-parentheses", "" },
1279 { "-Wpointer-arith",
1280 N_("Warn about function pointer arithmetic") },
1281 { "-Wno-pointer-arith", "" },
1282 { "-Wredundant-decls",
1283 N_("Warn about multiple declarations of the same object") },
1284 { "-Wno-redundant-decls", "" },
1286 N_("Warn whenever a function's return-type defaults to int") },
1287 { "-Wno-return-type", "" },
1288 { "-Wsequence-point",
1289 N_("Warn about possible violations of sequence point rules") },
1290 { "-Wno-sequence-point", "" },
1292 N_("Warn about signed/unsigned comparisons") },
1293 { "-Wno-sign-compare", "" },
1294 { "-Wstrict-prototypes",
1295 N_("Warn about non-prototyped function decls") },
1296 { "-Wno-strict-prototypes", "" },
1298 N_("Warn about constructs whose meanings change in ISO C") },
1299 { "-Wno-traditional", "" },
1301 N_("Warn when trigraphs are encountered") },
1302 { "-Wno-trigraphs", "" },
1304 { "-Wno-undef", "" },
1305 { "-Wunknown-pragmas",
1306 N_("Warn about unrecognized pragmas") },
1307 { "-Wno-unknown-pragmas", "" },
1308 { "-Wwrite-strings",
1309 N_("Mark strings as 'const char *'") },
1310 { "-Wno-write-strings", "" },
1312 #define DEFINE_LANG_NAME(NAME) { NULL, NAME },
1314 #include "options.h"
1318 /* Here is a table, controlled by the tm.h file, listing each -m switch
1319 and which bits in `target_switches' it should set or clear.
1320 If VALUE is positive, it is bits to set.
1321 If VALUE is negative, -VALUE is bits to clear.
1322 (The sign bit is not used so there is no confusion.) */
1326 const char *const name;
1328 const char *const description;
1330 target_switches [] = TARGET_SWITCHES;
1332 /* This table is similar, but allows the switch to have a value. */
1334 #ifdef TARGET_OPTIONS
1337 const char *const prefix;
1338 const char **const variable;
1339 const char *const description;
1341 target_options [] = TARGET_OPTIONS;
1344 /* Options controlling warnings. */
1346 /* Don't print warning messages. -w. */
1348 int inhibit_warnings = 0;
1350 /* Don't suppress warnings from system headers. -Wsystem-headers. */
1352 int warn_system_headers = 0;
1354 /* Print various extra warnings. -W. */
1356 int extra_warnings = 0;
1358 /* Treat warnings as errors. -Werror. */
1360 int warnings_are_errors = 0;
1362 /* Nonzero to warn about unused variables, functions et.al. */
1364 int warn_unused_function;
1365 int warn_unused_label;
1366 int warn_unused_parameter;
1367 int warn_unused_variable;
1368 int warn_unused_value;
1370 /* Nonzero to warn about code which is never reached. */
1372 int warn_notreached;
1374 /* Nonzero to warn about variables used before they are initialized. */
1376 int warn_uninitialized;
1378 /* Nonzero means warn about all declarations which shadow others. */
1382 /* Warn if a switch on an enum, that does not have a default case,
1383 fails to have a case for every enum value. */
1387 /* Warn if a switch does not have a default case. */
1389 int warn_switch_default;
1391 /* Warn if a switch on an enum fails to have a case for every enum
1392 value (regardless of the presence or otherwise of a default case). */
1394 int warn_switch_enum;
1396 /* Nonzero means warn about function definitions that default the return type
1397 or that use a null return and have a return-type other than void. */
1399 int warn_return_type;
1401 /* Nonzero means warn about pointer casts that increase the required
1402 alignment of the target type (and might therefore lead to a crash
1403 due to a misaligned access). */
1405 int warn_cast_align;
1407 /* Nonzero means warn about any objects definitions whose size is larger
1408 than N bytes. Also want about function definitions whose returned
1409 values are larger than N bytes. The value N is in `larger_than_size'. */
1411 int warn_larger_than;
1412 HOST_WIDE_INT larger_than_size;
1414 /* Nonzero means warn if inline function is too large. */
1418 /* Warn if a function returns an aggregate,
1419 since there are often incompatible calling conventions for doing this. */
1421 int warn_aggregate_return;
1423 /* Warn if packed attribute on struct is unnecessary and inefficient. */
1427 /* Warn when gcc pads a structure to an alignment boundary. */
1431 /* Warn when an optimization pass is disabled. */
1433 int warn_disabled_optimization;
1435 /* Warn about functions which might be candidates for attribute noreturn. */
1437 int warn_missing_noreturn;
1439 /* Nonzero means warn about uses of __attribute__((deprecated))
1442 int warn_deprecated_decl = 1;
1444 /* Likewise for -W. */
1446 static const lang_independent_options W_options[] =
1448 {"unused-function", &warn_unused_function, 1,
1449 N_("Warn when a function is unused") },
1450 {"unused-label", &warn_unused_label, 1,
1451 N_("Warn when a label is unused") },
1452 {"unused-parameter", &warn_unused_parameter, 1,
1453 N_("Warn when a function parameter is unused") },
1454 {"unused-variable", &warn_unused_variable, 1,
1455 N_("Warn when a variable is unused") },
1456 {"unused-value", &warn_unused_value, 1,
1457 N_("Warn when an expression value is unused") },
1458 {"system-headers", &warn_system_headers, 1,
1459 N_("Do not suppress warnings from system headers") },
1460 {"error", &warnings_are_errors, 1,
1461 N_("Treat all warnings as errors") },
1462 {"shadow", &warn_shadow, 1,
1463 N_("Warn when one local variable shadows another") },
1464 {"switch", &warn_switch, 1,
1465 N_("Warn about enumerated switches, with no default, missing a case") },
1466 {"switch-default", &warn_switch_default, 1,
1467 N_("Warn about enumerated switches missing a default case") },
1468 {"switch-enum", &warn_switch_enum, 1,
1469 N_("Warn about all enumerated switches missing a specific case") },
1470 {"aggregate-return", &warn_aggregate_return, 1,
1471 N_("Warn about returning structures, unions or arrays") },
1472 {"cast-align", &warn_cast_align, 1,
1473 N_("Warn about pointer casts which increase alignment") },
1474 {"unreachable-code", &warn_notreached, 1,
1475 N_("Warn about code that will never be executed") },
1476 {"uninitialized", &warn_uninitialized, 1,
1477 N_("Warn about uninitialized automatic variables") },
1478 {"inline", &warn_inline, 1,
1479 N_("Warn when an inlined function cannot be inlined") },
1480 {"packed", &warn_packed, 1,
1481 N_("Warn when the packed attribute has no effect on struct layout") },
1482 {"padded", &warn_padded, 1,
1483 N_("Warn when padding is required to align struct members") },
1484 {"disabled-optimization", &warn_disabled_optimization, 1,
1485 N_("Warn when an optimization pass is disabled") },
1486 {"deprecated-declarations", &warn_deprecated_decl, 1,
1487 N_("Warn about uses of __attribute__((deprecated)) declarations") },
1488 {"missing-noreturn", &warn_missing_noreturn, 1,
1489 N_("Warn about functions which might be candidates for attribute noreturn") }
1493 set_Wunused (setting)
1496 warn_unused_function = setting;
1497 warn_unused_label = setting;
1498 /* Unused function parameter warnings are reported when either ``-W
1499 -Wunused'' or ``-Wunused-parameter'' is specified. Differentiate
1500 -Wunused by setting WARN_UNUSED_PARAMETER to -1. */
1502 warn_unused_parameter = 0;
1503 else if (!warn_unused_parameter)
1504 warn_unused_parameter = -1;
1505 warn_unused_variable = setting;
1506 warn_unused_value = setting;
1509 /* The following routines are useful in setting all the flags that
1510 -ffast-math and -fno-fast-math imply. */
1513 set_fast_math_flags ()
1515 flag_trapping_math = 0;
1516 flag_unsafe_math_optimizations = 1;
1517 flag_errno_math = 0;
1521 set_no_fast_math_flags ()
1523 flag_trapping_math = 1;
1524 flag_unsafe_math_optimizations = 0;
1525 flag_errno_math = 1;
1529 /* Output files for assembler code (real compiler output)
1530 and debugging dumps. */
1533 FILE *aux_info_file;
1534 FILE *rtl_dump_file = NULL;
1536 /* Decode the string P as an integral parameter.
1537 If the string is indeed an integer return its numeric value else
1538 issue an Invalid Option error for the option PNAME and return DEFVAL.
1539 If PNAME is zero just return DEFVAL, do not call error. */
1542 read_integral_parameter (p, pname, defval)
1547 const char *endp = p;
1551 if (ISDIGIT (*endp))
1560 error ("invalid option `%s'", pname);
1567 /* This calls abort and is used to avoid problems when abort if a macro.
1568 It is used when we need to pass the address of abort. */
1576 /* When `malloc.c' is compiled with `rcheck' defined,
1577 it calls this function to report clobberage. */
1581 const char *s ATTRIBUTE_UNUSED;
1586 /* Return the logarithm of X, base 2, considering X unsigned,
1587 if X is a power of 2. Otherwise, returns -1.
1589 This should be used via the `exact_log2' macro. */
1593 unsigned HOST_WIDE_INT x;
1596 /* Test for 0 or a power of 2. */
1597 if (x == 0 || x != (x & -x))
1599 while ((x >>= 1) != 0)
1604 /* Given X, an unsigned number, return the largest int Y such that 2**Y <= X.
1605 If X is 0, return -1.
1607 This should be used via the floor_log2 macro. */
1611 unsigned HOST_WIDE_INT x;
1620 /* Handler for fatal signals, such as SIGSEGV. These are transformed
1621 into ICE messages, which is much more user friendly. */
1624 crash_signal (signo)
1627 internal_error ("internal error: %s", strsignal (signo));
1630 /* Strip off a legitimate source ending from the input string NAME of
1631 length LEN. Rather than having to know the names used by all of
1632 our front ends, we strip off an ending of a period followed by
1633 up to five characters. (Java uses ".class".) */
1636 strip_off_ending (name, len)
1641 for (i = 2; i < 6 && len > i; i++)
1643 if (name[len - i] == '.')
1645 name[len - i] = '\0';
1651 /* Output a quoted string. */
1654 output_quoted_string (asm_file, string)
1658 #ifdef OUTPUT_QUOTED_STRING
1659 OUTPUT_QUOTED_STRING (asm_file, string);
1663 putc ('\"', asm_file);
1664 while ((c = *string++) != 0)
1668 if (c == '\"' || c == '\\')
1669 putc ('\\', asm_file);
1673 fprintf (asm_file, "\\%03o", c);
1675 putc ('\"', asm_file);
1679 /* Output a file name in the form wanted by System V. */
1682 output_file_directive (asm_file, input_name)
1684 const char *input_name;
1686 int len = strlen (input_name);
1687 const char *na = input_name + len;
1689 /* NA gets INPUT_NAME sans directory names. */
1690 while (na > input_name)
1692 if (IS_DIR_SEPARATOR (na[-1]))
1697 #ifdef ASM_OUTPUT_MAIN_SOURCE_FILENAME
1698 ASM_OUTPUT_MAIN_SOURCE_FILENAME (asm_file, na);
1700 #ifdef ASM_OUTPUT_SOURCE_FILENAME
1701 ASM_OUTPUT_SOURCE_FILENAME (asm_file, na);
1703 fprintf (asm_file, "\t.file\t");
1704 output_quoted_string (asm_file, na);
1705 fputc ('\n', asm_file);
1710 /* Routine to open a dump file. Return true if the dump file is enabled. */
1713 open_dump_file (index, decl)
1714 enum dump_file_index index;
1718 const char *open_arg;
1721 if (! dump_file[index].enabled)
1724 timevar_push (TV_DUMP);
1725 if (rtl_dump_file != NULL)
1726 fclose (rtl_dump_file);
1728 sprintf (seq, DUMPFILE_FORMAT, index);
1730 if (! dump_file[index].initialized)
1732 /* If we've not initialized the files, do so now. */
1733 if (graph_dump_format != no_graph
1734 && dump_file[index].graph_dump_p)
1736 dump_name = concat (seq, dump_file[index].extension, NULL);
1737 clean_graph_dump_file (dump_base_name, dump_name);
1740 dump_file[index].initialized = 1;
1746 dump_name = concat (dump_base_name, seq,
1747 dump_file[index].extension, NULL);
1749 rtl_dump_file = fopen (dump_name, open_arg);
1750 if (rtl_dump_file == NULL)
1751 fatal_io_error ("can't open %s", dump_name);
1756 fprintf (rtl_dump_file, "\n;; Function %s\n\n",
1757 (*lang_hooks.decl_printable_name) (decl, 2));
1759 timevar_pop (TV_DUMP);
1763 /* Routine to close a dump file. */
1766 close_dump_file (index, func, insns)
1767 enum dump_file_index index;
1768 void (*func) PARAMS ((FILE *, rtx));
1771 if (! rtl_dump_file)
1774 timevar_push (TV_DUMP);
1776 && graph_dump_format != no_graph
1777 && dump_file[index].graph_dump_p)
1782 sprintf (seq, DUMPFILE_FORMAT, index);
1783 suffix = concat (seq, dump_file[index].extension, NULL);
1784 print_rtl_graph_with_bb (dump_base_name, suffix, insns);
1789 func (rtl_dump_file, insns);
1791 fflush (rtl_dump_file);
1792 fclose (rtl_dump_file);
1794 rtl_dump_file = NULL;
1795 timevar_pop (TV_DUMP);
1798 /* Do any final processing required for the declarations in VEC, of
1799 which there are LEN. We write out inline functions and variables
1800 that have been deferred until this point, but which are required.
1801 Returns non-zero if anything was put out. */
1804 wrapup_global_declarations (vec, len)
1811 int output_something = 0;
1813 for (i = 0; i < len; i++)
1817 /* We're not deferring this any longer. */
1818 DECL_DEFER_OUTPUT (decl) = 0;
1820 if (TREE_CODE (decl) == VAR_DECL && DECL_SIZE (decl) == 0)
1821 (*lang_hooks.finish_incomplete_decl) (decl);
1824 /* Now emit any global variables or functions that we have been
1825 putting off. We need to loop in case one of the things emitted
1826 here references another one which comes earlier in the list. */
1830 for (i = 0; i < len; i++)
1834 if (TREE_ASM_WRITTEN (decl) || DECL_EXTERNAL (decl))
1837 /* Don't write out static consts, unless we still need them.
1839 We also keep static consts if not optimizing (for debugging),
1840 unless the user specified -fno-keep-static-consts.
1841 ??? They might be better written into the debug information.
1842 This is possible when using DWARF.
1844 A language processor that wants static constants to be always
1845 written out (even if it is not used) is responsible for
1846 calling rest_of_decl_compilation itself. E.g. the C front-end
1847 calls rest_of_decl_compilation from finish_decl.
1848 One motivation for this is that is conventional in some
1849 environments to write things like:
1850 static const char rcsid[] = "... version string ...";
1851 intending to force the string to be in the executable.
1853 A language processor that would prefer to have unneeded
1854 static constants "optimized away" would just defer writing
1855 them out until here. E.g. C++ does this, because static
1856 constants are often defined in header files.
1858 ??? A tempting alternative (for both C and C++) would be
1859 to force a constant to be written if and only if it is
1860 defined in a main file, as opposed to an include file. */
1862 if (TREE_CODE (decl) == VAR_DECL && TREE_STATIC (decl))
1866 if (TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl)))
1868 else if (DECL_COMDAT (decl))
1870 else if (TREE_READONLY (decl) && !TREE_PUBLIC (decl)
1871 && (optimize || !flag_keep_static_consts
1872 || DECL_ARTIFICIAL (decl)))
1878 rest_of_decl_compilation (decl, NULL, 1, 1);
1882 if (TREE_CODE (decl) == FUNCTION_DECL
1883 && DECL_INITIAL (decl) != 0
1884 && DECL_SAVED_INSNS (decl) != 0
1885 && (flag_keep_inline_functions
1886 || (TREE_PUBLIC (decl) && !DECL_COMDAT (decl))
1887 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl))))
1890 output_inline_function (decl);
1895 output_something = 1;
1899 return output_something;
1902 /* Issue appropriate warnings for the global declarations in VEC (of
1903 which there are LEN). Output debugging information for them. */
1906 check_global_declarations (vec, len)
1913 for (i = 0; i < len; i++)
1917 if (TREE_CODE (decl) == VAR_DECL && TREE_STATIC (decl)
1918 && ! TREE_ASM_WRITTEN (decl))
1919 /* Cancel the RTL for this decl so that, if debugging info
1920 output for global variables is still to come,
1921 this one will be omitted. */
1922 SET_DECL_RTL (decl, NULL_RTX);
1924 /* Warn about any function
1925 declared static but not defined.
1926 We don't warn about variables,
1927 because many programs have static variables
1928 that exist only to get some text into the object file. */
1929 if (TREE_CODE (decl) == FUNCTION_DECL
1930 && (warn_unused_function
1931 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl)))
1932 && DECL_INITIAL (decl) == 0
1933 && DECL_EXTERNAL (decl)
1934 && ! DECL_ARTIFICIAL (decl)
1935 && ! TREE_PUBLIC (decl))
1937 if (TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl)))
1938 pedwarn_with_decl (decl,
1939 "`%s' used but never defined");
1941 warning_with_decl (decl,
1942 "`%s' declared `static' but never defined");
1943 /* This symbol is effectively an "extern" declaration now. */
1944 TREE_PUBLIC (decl) = 1;
1945 assemble_external (decl);
1948 /* Warn about static fns or vars defined but not used. */
1949 if (((warn_unused_function && TREE_CODE (decl) == FUNCTION_DECL)
1950 || (warn_unused_variable && TREE_CODE (decl) == VAR_DECL))
1951 && ! TREE_USED (decl)
1952 /* The TREE_USED bit for file-scope decls is kept in the identifier,
1953 to handle multiple external decls in different scopes. */
1954 && ! TREE_USED (DECL_NAME (decl))
1955 && ! DECL_EXTERNAL (decl)
1956 && ! TREE_PUBLIC (decl)
1957 /* Global register variables must be declared to reserve them. */
1958 && ! (TREE_CODE (decl) == VAR_DECL && DECL_REGISTER (decl))
1959 /* Otherwise, ask the language. */
1960 && (*lang_hooks.decls.warn_unused_global) (decl))
1961 warning_with_decl (decl, "`%s' defined but not used");
1963 timevar_push (TV_SYMOUT);
1964 (*debug_hooks->global_decl) (decl);
1965 timevar_pop (TV_SYMOUT);
1969 /* Save the current INPUT_FILENAME and LINENO on the top entry in the
1970 INPUT_FILE_STACK. Push a new entry for FILE and LINE, and set the
1971 INPUT_FILENAME and LINENO accordingly. */
1974 push_srcloc (file, line)
1978 struct file_stack *fs;
1980 if (input_file_stack)
1982 input_file_stack->name = input_filename;
1983 input_file_stack->line = lineno;
1986 fs = (struct file_stack *) xmalloc (sizeof (struct file_stack));
1987 fs->name = input_filename = file;
1988 fs->line = lineno = line;
1989 fs->indent_level = 0;
1990 fs->next = input_file_stack;
1991 input_file_stack = fs;
1992 input_file_stack_tick++;
1995 /* Pop the top entry off the stack of presently open source files.
1996 Restore the INPUT_FILENAME and LINENO from the new topmost entry on
2002 struct file_stack *fs;
2004 fs = input_file_stack;
2005 input_file_stack = fs->next;
2007 input_file_stack_tick++;
2008 /* The initial source file is never popped. */
2009 if (!input_file_stack)
2011 input_filename = input_file_stack->name;
2012 lineno = input_file_stack->line;
2015 /* Compile an entire translation unit. Write a file of assembly
2016 output and various debugging dumps. */
2023 /* Initialize yet another pass. */
2025 init_final (main_input_filename);
2026 init_branch_prob (dump_base_name);
2028 timevar_push (TV_PARSE);
2030 /* Call the parser, which parses the entire file (calling
2031 rest_of_compilation for each function). */
2032 (*lang_hooks.parse_file) ();
2034 /* In case there were missing block closers,
2035 get us back to the global binding level. */
2036 (*lang_hooks.clear_binding_stack) ();
2038 /* Compilation is now finished except for writing
2039 what's left of the symbol table output. */
2040 timevar_pop (TV_PARSE);
2042 if (flag_syntax_only)
2045 globals = (*lang_hooks.decls.getdecls) ();
2047 /* Really define vars that have had only a tentative definition.
2048 Really output inline functions that must actually be callable
2049 and have not been output so far. */
2052 int len = list_length (globals);
2053 tree *vec = (tree *) xmalloc (sizeof (tree) * len);
2057 /* Process the decls in reverse order--earliest first.
2058 Put them into VEC from back to front, then take out from front. */
2060 for (i = 0, decl = globals; i < len; i++, decl = TREE_CHAIN (decl))
2061 vec[len - i - 1] = decl;
2063 wrapup_global_declarations (vec, len);
2065 /* This must occur after the loop to output deferred functions. Else
2066 the profiler initializer would not be emitted if all the functions
2067 in this compilation unit were deferred.
2069 output_func_start_profiler can not cause any additional functions or
2070 data to need to be output, so it need not be in the deferred function
2072 output_func_start_profiler ();
2074 check_global_declarations (vec, len);
2080 /* Write out any pending weak symbol declarations. */
2084 /* Do dbx symbols. */
2085 timevar_push (TV_SYMOUT);
2087 #ifdef DWARF2_UNWIND_INFO
2088 if (dwarf2out_do_frame ())
2089 dwarf2out_frame_finish ();
2092 (*debug_hooks->finish) (main_input_filename);
2093 timevar_pop (TV_SYMOUT);
2095 /* Output some stuff at end of file if nec. */
2097 dw2_output_indirect_constants ();
2099 end_final (dump_base_name);
2101 if (profile_arc_flag || flag_test_coverage || flag_branch_probabilities)
2103 timevar_push (TV_DUMP);
2104 open_dump_file (DFI_bp, NULL);
2108 close_dump_file (DFI_bp, NULL, NULL_RTX);
2109 timevar_pop (TV_DUMP);
2113 ASM_FILE_END (asm_out_file);
2116 /* Attach a special .ident directive to the end of the file to identify
2117 the version of GCC which compiled this code. The format of the .ident
2118 string is patterned after the ones produced by native SVR4 compilers. */
2121 fprintf (asm_out_file, "%s\"GCC: (GNU) %s\"\n",
2122 IDENT_ASM_OP, version_string);
2125 if (optimize > 0 && open_dump_file (DFI_combine, NULL))
2127 timevar_push (TV_DUMP);
2128 dump_combine_total_stats (rtl_dump_file);
2129 close_dump_file (DFI_combine, NULL, NULL_RTX);
2130 timevar_pop (TV_DUMP);
2134 /* This is called from various places for FUNCTION_DECL, VAR_DECL,
2135 and TYPE_DECL nodes.
2137 This does nothing for local (non-static) variables, unless the
2138 variable is a register variable with an ASMSPEC. In that case, or
2139 if the variable is not an automatic, it sets up the RTL and
2140 outputs any assembler code (label definition, storage allocation
2141 and initialization).
2143 DECL is the declaration. If ASMSPEC is nonzero, it specifies
2144 the assembler symbol name to be used. TOP_LEVEL is nonzero
2145 if this declaration is not within a function. */
2148 rest_of_decl_compilation (decl, asmspec, top_level, at_end)
2150 const char *asmspec;
2154 /* Declarations of variables, and of functions defined elsewhere. */
2156 /* The most obvious approach, to put an #ifndef around where
2157 this macro is used, doesn't work since it's inside a macro call. */
2158 #ifndef ASM_FINISH_DECLARE_OBJECT
2159 #define ASM_FINISH_DECLARE_OBJECT(FILE, DECL, TOP, END)
2162 /* We deferred calling assemble_alias so that we could collect
2163 other attributes such as visibility. Emit the alias now. */
2166 alias = lookup_attribute ("alias", DECL_ATTRIBUTES (decl));
2169 alias = TREE_VALUE (TREE_VALUE (alias));
2170 alias = get_identifier (TREE_STRING_POINTER (alias));
2171 assemble_alias (decl, alias);
2175 /* Forward declarations for nested functions are not "external",
2176 but we need to treat them as if they were. */
2177 if (TREE_STATIC (decl) || DECL_EXTERNAL (decl)
2178 || TREE_CODE (decl) == FUNCTION_DECL)
2180 timevar_push (TV_VARCONST);
2183 make_decl_rtl (decl, asmspec);
2185 /* Don't output anything when a tentative file-scope definition
2186 is seen. But at end of compilation, do output code for them. */
2187 if (at_end || !DECL_DEFER_OUTPUT (decl))
2188 assemble_variable (decl, top_level, at_end, 0);
2189 if (decl == last_assemble_variable_decl)
2191 ASM_FINISH_DECLARE_OBJECT (asm_out_file, decl,
2195 timevar_pop (TV_VARCONST);
2197 else if (DECL_REGISTER (decl) && asmspec != 0)
2199 if (decode_reg_name (asmspec) >= 0)
2201 SET_DECL_RTL (decl, NULL_RTX);
2202 make_decl_rtl (decl, asmspec);
2206 error ("invalid register name `%s' for register variable", asmspec);
2207 DECL_REGISTER (decl) = 0;
2212 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
2213 else if ((write_symbols == DBX_DEBUG || write_symbols == XCOFF_DEBUG)
2214 && TREE_CODE (decl) == TYPE_DECL)
2216 timevar_push (TV_SYMOUT);
2217 dbxout_symbol (decl, 0);
2218 timevar_pop (TV_SYMOUT);
2221 #ifdef SDB_DEBUGGING_INFO
2222 else if (write_symbols == SDB_DEBUG && top_level
2223 && TREE_CODE (decl) == TYPE_DECL)
2225 timevar_push (TV_SYMOUT);
2226 sdbout_symbol (decl, 0);
2227 timevar_pop (TV_SYMOUT);
2232 /* Called after finishing a record, union or enumeral type. */
2235 rest_of_type_compilation (type, toplev)
2236 #if defined(DBX_DEBUGGING_INFO) || defined(XCOFF_DEBUGGING_INFO) || defined (SDB_DEBUGGING_INFO)
2240 tree type ATTRIBUTE_UNUSED;
2241 int toplev ATTRIBUTE_UNUSED;
2244 timevar_push (TV_SYMOUT);
2245 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
2246 if (write_symbols == DBX_DEBUG || write_symbols == XCOFF_DEBUG)
2247 dbxout_symbol (TYPE_STUB_DECL (type), !toplev);
2249 #ifdef SDB_DEBUGGING_INFO
2250 if (write_symbols == SDB_DEBUG)
2251 sdbout_symbol (TYPE_STUB_DECL (type), !toplev);
2253 #ifdef DWARF2_DEBUGGING_INFO
2254 if ((write_symbols == DWARF2_DEBUG
2255 || write_symbols == VMS_AND_DWARF2_DEBUG)
2257 dwarf2out_decl (TYPE_STUB_DECL (type));
2259 timevar_pop (TV_SYMOUT);
2262 /* This is called from finish_function (within langhooks.parse_file)
2263 after each top-level definition is parsed.
2264 It is supposed to compile that function or variable
2265 and output the assembler code for it.
2266 After we return, the tree storage is freed. */
2269 rest_of_compilation (decl)
2275 int rebuild_label_notes_after_reload;
2276 int register_life_up_to_date;
2278 timevar_push (TV_REST_OF_COMPILATION);
2280 /* Now that we're out of the frontend, we shouldn't have any more
2281 CONCATs anywhere. */
2282 generating_concat_p = 0;
2284 /* When processing delayed functions, prepare_function_start() won't
2285 have been run to re-initialize it. */
2286 cse_not_expected = ! optimize;
2288 /* First, make sure that NOTE_BLOCK is set correctly for each
2289 NOTE_INSN_BLOCK_BEG/NOTE_INSN_BLOCK_END note. */
2290 if (!cfun->x_whole_function_mode_p)
2293 /* In function-at-a-time mode, we do not attempt to keep the BLOCK
2294 tree in sensible shape. So, we just recalculate it here. */
2295 if (cfun->x_whole_function_mode_p)
2300 /* If we are reconsidering an inline function
2301 at the end of compilation, skip the stuff for making it inline. */
2303 if (DECL_SAVED_INSNS (decl) == 0)
2309 /* If this is nested inside an inlined external function, pretend
2310 it was only declared. Since we cannot inline such functions,
2311 generating code for this one is not only not necessary but will
2312 confuse some debugging output writers. */
2313 for (parent = DECL_CONTEXT (current_function_decl);
2314 parent != NULL_TREE;
2315 parent = get_containing_scope (parent))
2316 if (TREE_CODE (parent) == FUNCTION_DECL
2317 && DECL_INLINE (parent) && DECL_EXTERNAL (parent))
2319 DECL_INITIAL (decl) = 0;
2320 goto exit_rest_of_compilation;
2323 /* If requested, consider whether to make this function inline. */
2324 if ((DECL_INLINE (decl) && !flag_no_inline)
2325 || flag_inline_functions)
2327 timevar_push (TV_INTEGRATION);
2328 lose = function_cannot_inline_p (decl);
2329 timevar_pop (TV_INTEGRATION);
2330 if (lose || ! optimize)
2332 if (warn_inline && DECL_INLINE (decl))
2333 warning_with_decl (decl, lose);
2334 DECL_ABSTRACT_ORIGIN (decl) = 0;
2335 /* Don't really compile an extern inline function.
2336 If we can't make it inline, pretend
2337 it was only declared. */
2338 if (DECL_EXTERNAL (decl))
2340 DECL_INITIAL (decl) = 0;
2341 goto exit_rest_of_compilation;
2345 /* ??? Note that this has the effect of making it look
2346 like "inline" was specified for a function if we choose
2347 to inline it. This isn't quite right, but it's
2348 probably not worth the trouble to fix. */
2349 inlinable = DECL_INLINE (decl) = 1;
2352 insns = get_insns ();
2354 /* Dump the rtl code if we are dumping rtl. */
2356 if (open_dump_file (DFI_rtl, decl))
2358 if (DECL_SAVED_INSNS (decl))
2359 fprintf (rtl_dump_file, ";; (integrable)\n\n");
2360 close_dump_file (DFI_rtl, print_rtl, insns);
2363 /* Convert from NOTE_INSN_EH_REGION style notes, and do other
2364 sorts of eh initialization. Delay this until after the
2365 initial rtl dump so that we can see the original nesting. */
2366 convert_from_eh_region_ranges ();
2368 /* If function is inline, and we don't yet know whether to
2369 compile it by itself, defer decision till end of compilation.
2370 finish_compilation will call rest_of_compilation again
2371 for those functions that need to be output. Also defer those
2372 functions that we are supposed to defer. */
2375 || (DECL_INLINE (decl)
2376 && ((! TREE_PUBLIC (decl) && ! TREE_ADDRESSABLE (decl)
2377 && ! flag_keep_inline_functions)
2378 || DECL_EXTERNAL (decl))))
2379 DECL_DEFER_OUTPUT (decl) = 1;
2381 if (DECL_INLINE (decl))
2382 /* DWARF wants separate debugging info for abstract and
2383 concrete instances of all inline functions, including those
2384 declared inline but not inlined, and those inlined even
2385 though they weren't declared inline. Conveniently, that's
2386 what DECL_INLINE means at this point. */
2387 (*debug_hooks->deferred_inline_function) (decl);
2389 if (DECL_DEFER_OUTPUT (decl))
2391 /* If -Wreturn-type, we have to do a bit of compilation. We just
2392 want to call cleanup the cfg to figure out whether or not we can
2393 fall off the end of the function; we do the minimum amount of
2394 work necessary to make that safe. */
2395 if (warn_return_type)
2397 int saved_optimize = optimize;
2400 rebuild_jump_labels (insns);
2401 find_exception_handler_labels ();
2402 find_basic_blocks (insns, max_reg_num (), rtl_dump_file);
2403 cleanup_cfg (CLEANUP_PRE_SIBCALL | CLEANUP_PRE_LOOP);
2404 optimize = saved_optimize;
2406 /* CFG is no longer maintained up-to-date. */
2407 free_bb_for_insn ();
2410 current_function_nothrow = nothrow_function_p ();
2411 if (current_function_nothrow)
2412 /* Now we know that this can't throw; set the flag for the benefit
2413 of other functions later in this translation unit. */
2414 TREE_NOTHROW (current_function_decl) = 1;
2416 timevar_push (TV_INTEGRATION);
2417 save_for_inline (decl);
2418 timevar_pop (TV_INTEGRATION);
2419 DECL_SAVED_INSNS (decl)->inlinable = inlinable;
2420 goto exit_rest_of_compilation;
2423 /* If specified extern inline but we aren't inlining it, we are
2424 done. This goes for anything that gets here with DECL_EXTERNAL
2425 set, not just things with DECL_INLINE. */
2426 if (DECL_EXTERNAL (decl))
2427 goto exit_rest_of_compilation;
2430 /* If we're emitting a nested function, make sure its parent gets
2431 emitted as well. Doing otherwise confuses debug info. */
2434 for (parent = DECL_CONTEXT (current_function_decl);
2435 parent != NULL_TREE;
2436 parent = get_containing_scope (parent))
2437 if (TREE_CODE (parent) == FUNCTION_DECL)
2438 TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (parent)) = 1;
2441 /* We are now committed to emitting code for this function. Do any
2442 preparation, such as emitting abstract debug info for the inline
2443 before it gets mangled by optimization. */
2444 if (DECL_INLINE (decl))
2445 (*debug_hooks->outlining_inline_function) (decl);
2447 /* Remove any notes we don't need. That will make iterating
2448 over the instruction sequence faster, and allow the garbage
2449 collector to reclaim the memory used by the notes. */
2450 remove_unnecessary_notes ();
2455 /* Initialize some variables used by the optimizers. */
2456 init_function_for_compilation ();
2458 if (! DECL_DEFER_OUTPUT (decl))
2459 TREE_ASM_WRITTEN (decl) = 1;
2461 /* Now that integrate will no longer see our rtl, we need not
2462 distinguish between the return value of this function and the
2463 return value of called functions. Also, we can remove all SETs
2464 of subregs of hard registers; they are only here because of
2465 integrate. Also, we can now initialize pseudos intended to
2466 carry magic hard reg data throughout the function. */
2467 rtx_equal_function_value_matters = 0;
2468 purge_hard_subreg_sets (get_insns ());
2470 /* Early return if there were errors. We can run afoul of our
2471 consistency checks, and there's not really much point in fixing them.
2472 Don't return yet if -Wreturn-type; we need to do cleanup_cfg. */
2473 if (((rtl_dump_and_exit || flag_syntax_only) && !warn_return_type)
2474 || errorcount || sorrycount)
2475 goto exit_rest_of_compilation;
2477 /* We may have potential sibling or tail recursion sites. Select one
2478 (of possibly multiple) methods of performing the call. */
2479 if (flag_optimize_sibling_calls)
2481 timevar_push (TV_JUMP);
2482 open_dump_file (DFI_sibling, decl);
2484 optimize_sibling_and_tail_recursive_calls ();
2486 close_dump_file (DFI_sibling, print_rtl, get_insns ());
2487 timevar_pop (TV_JUMP);
2490 /* Complete generation of exception handling code. */
2491 find_exception_handler_labels ();
2494 timevar_push (TV_JUMP);
2495 open_dump_file (DFI_eh, decl);
2497 finish_eh_generation ();
2499 close_dump_file (DFI_eh, print_rtl, get_insns ());
2500 timevar_pop (TV_JUMP);
2503 /* Delay emitting hard_reg_initial_value sets until after EH landing pad
2504 generation, which might create new sets. */
2505 emit_initial_value_sets ();
2508 /* If we are doing position-independent code generation, now
2509 is the time to output special prologues and epilogues.
2510 We do not want to do this earlier, because it just clutters
2511 up inline functions with meaningless insns. */
2516 insns = get_insns ();
2518 /* Copy any shared structure that should not be shared. */
2519 unshare_all_rtl (current_function_decl, insns);
2521 #ifdef SETJMP_VIA_SAVE_AREA
2522 /* This must be performed before virtual register instantiation. */
2523 if (current_function_calls_alloca)
2524 optimize_save_area_alloca (insns);
2527 /* Instantiate all virtual registers. */
2528 instantiate_virtual_regs (current_function_decl, insns);
2530 open_dump_file (DFI_jump, decl);
2532 /* Always do one jump optimization pass to ensure that JUMP_LABEL fields
2533 are initialized and to compute whether control can drop off the end
2536 timevar_push (TV_JUMP);
2537 /* Turn NOTE_INSN_EXPECTED_VALUE into REG_BR_PROB. Do this
2538 before jump optimization switches branch directions. */
2539 expected_value_to_br_prob ();
2541 reg_scan (insns, max_reg_num (), 0);
2542 rebuild_jump_labels (insns);
2543 find_basic_blocks (insns, max_reg_num (), rtl_dump_file);
2545 dump_flow_info (rtl_dump_file);
2546 cleanup_cfg ((optimize ? CLEANUP_EXPENSIVE : 0) | CLEANUP_PRE_LOOP
2547 | (flag_thread_jumps ? CLEANUP_THREADING : 0));
2549 /* CFG is no longer maintained up-to-date. */
2550 free_bb_for_insn ();
2551 copy_loop_headers (insns);
2552 purge_line_number_notes (insns);
2554 timevar_pop (TV_JUMP);
2555 close_dump_file (DFI_jump, print_rtl, insns);
2557 /* Now is when we stop if -fsyntax-only and -Wreturn-type. */
2558 if (rtl_dump_and_exit || flag_syntax_only || DECL_DEFER_OUTPUT (decl))
2560 goto exit_rest_of_compilation;
2563 /* Long term, this should probably move before the jump optimizer too,
2564 but I didn't want to disturb the rtl_dump_and_exit and related
2565 stuff at this time. */
2566 if (optimize > 0 && flag_ssa)
2568 /* Convert to SSA form. */
2570 timevar_push (TV_TO_SSA);
2571 open_dump_file (DFI_ssa, decl);
2573 find_basic_blocks (insns, max_reg_num (), rtl_dump_file);
2574 cleanup_cfg (CLEANUP_EXPENSIVE | CLEANUP_PRE_LOOP);
2577 close_dump_file (DFI_ssa, print_rtl_with_bb, insns);
2578 timevar_pop (TV_TO_SSA);
2580 /* Perform sparse conditional constant propagation, if requested. */
2583 timevar_push (TV_SSA_CCP);
2584 open_dump_file (DFI_ssa_ccp, decl);
2588 close_dump_file (DFI_ssa_ccp, print_rtl_with_bb, get_insns ());
2589 timevar_pop (TV_SSA_CCP);
2592 /* It would be useful to cleanup the CFG at this point, but block
2593 merging and possibly other transformations might leave a PHI
2594 node in the middle of a basic block, which is a strict no-no. */
2596 /* The SSA implementation uses basic block numbers in its phi
2597 nodes. Thus, changing the control-flow graph or the basic
2598 blocks, e.g., calling find_basic_blocks () or cleanup_cfg (),
2599 may cause problems. */
2603 /* Remove dead code. */
2605 timevar_push (TV_SSA_DCE);
2606 open_dump_file (DFI_ssa_dce, decl);
2608 insns = get_insns ();
2609 ssa_eliminate_dead_code();
2611 close_dump_file (DFI_ssa_dce, print_rtl_with_bb, insns);
2612 timevar_pop (TV_SSA_DCE);
2615 /* Convert from SSA form. */
2617 timevar_push (TV_FROM_SSA);
2618 open_dump_file (DFI_ussa, decl);
2620 convert_from_ssa ();
2621 /* New registers have been created. Rescan their usage. */
2622 reg_scan (insns, max_reg_num (), 1);
2624 close_dump_file (DFI_ussa, print_rtl_with_bb, insns);
2625 timevar_pop (TV_FROM_SSA);
2628 /* CFG is no longer maintained up-to-date. */
2629 free_bb_for_insn ();
2632 timevar_push (TV_JUMP);
2636 open_dump_file (DFI_null, decl);
2637 find_basic_blocks (insns, max_reg_num (), rtl_dump_file);
2639 dump_flow_info (rtl_dump_file);
2640 cleanup_cfg (CLEANUP_EXPENSIVE | CLEANUP_PRE_LOOP);
2642 /* Try to identify useless null pointer tests and delete them. */
2643 if (flag_delete_null_pointer_checks)
2644 delete_null_pointer_checks (insns);
2646 timevar_push (TV_IFCVT);
2648 timevar_pop (TV_IFCVT);
2649 cleanup_cfg (CLEANUP_EXPENSIVE | CLEANUP_PRE_LOOP);
2650 close_dump_file (DFI_null, print_rtl_with_bb, insns);
2653 /* Jump optimization, and the removal of NULL pointer checks, may
2654 have reduced the number of instructions substantially. CSE, and
2655 future passes, allocate arrays whose dimensions involve the
2656 maximum instruction UID, so if we can reduce the maximum UID
2657 we'll save big on memory. */
2658 renumber_insns (rtl_dump_file);
2660 compute_bb_for_insn (get_max_uid ());
2661 timevar_pop (TV_JUMP);
2663 close_dump_file (DFI_jump, print_rtl_with_bb, insns);
2667 /* Perform common subexpression elimination.
2668 Nonzero value from `cse_main' means that jumps were simplified
2669 and some code may now be unreachable, so do
2670 jump optimization again. */
2674 open_dump_file (DFI_cse, decl);
2676 dump_flow_info (rtl_dump_file);
2677 timevar_push (TV_CSE);
2679 reg_scan (insns, max_reg_num (), 1);
2681 tem = cse_main (insns, max_reg_num (), 0, rtl_dump_file);
2683 rebuild_jump_labels (insns);
2684 purge_all_dead_edges (0);
2686 delete_trivially_dead_insns (insns, max_reg_num ());
2688 /* If we are not running more CSE passes, then we are no longer
2689 expecting CSE to be run. But always rerun it in a cheap mode. */
2690 cse_not_expected = !flag_rerun_cse_after_loop && !flag_gcse;
2692 if (tem || optimize > 1)
2693 cleanup_cfg (CLEANUP_EXPENSIVE | CLEANUP_PRE_LOOP);
2694 /* Try to identify useless null pointer tests and delete them. */
2695 if (flag_delete_null_pointer_checks || flag_thread_jumps)
2697 timevar_push (TV_JUMP);
2699 if (flag_delete_null_pointer_checks)
2700 delete_null_pointer_checks (insns);
2701 /* CFG is no longer maintained up-to-date. */
2702 timevar_pop (TV_JUMP);
2705 /* The second pass of jump optimization is likely to have
2706 removed a bunch more instructions. */
2707 renumber_insns (rtl_dump_file);
2708 compute_bb_for_insn (get_max_uid ());
2710 timevar_pop (TV_CSE);
2711 close_dump_file (DFI_cse, print_rtl_with_bb, insns);
2714 open_dump_file (DFI_addressof, decl);
2716 purge_addressof (insns);
2718 purge_all_dead_edges (0);
2719 reg_scan (insns, max_reg_num (), 1);
2721 close_dump_file (DFI_addressof, print_rtl, insns);
2725 /* Perform global cse. */
2727 if (optimize > 0 && flag_gcse)
2729 int save_csb, save_cfj;
2732 timevar_push (TV_GCSE);
2733 open_dump_file (DFI_gcse, decl);
2735 cleanup_cfg (CLEANUP_EXPENSIVE | CLEANUP_PRE_LOOP);
2736 tem = gcse_main (insns, rtl_dump_file);
2737 rebuild_jump_labels (insns);
2738 delete_trivially_dead_insns (insns, max_reg_num ());
2740 save_csb = flag_cse_skip_blocks;
2741 save_cfj = flag_cse_follow_jumps;
2742 flag_cse_skip_blocks = flag_cse_follow_jumps = 0;
2744 /* If -fexpensive-optimizations, re-run CSE to clean up things done
2746 if (flag_expensive_optimizations)
2748 timevar_push (TV_CSE);
2749 reg_scan (insns, max_reg_num (), 1);
2750 tem2 = cse_main (insns, max_reg_num (), 0, rtl_dump_file);
2751 purge_all_dead_edges (0);
2752 delete_trivially_dead_insns (insns, max_reg_num ());
2753 timevar_pop (TV_CSE);
2754 cse_not_expected = !flag_rerun_cse_after_loop;
2757 /* If gcse or cse altered any jumps, rerun jump optimizations to clean
2758 things up. Then possibly re-run CSE again. */
2762 timevar_push (TV_JUMP);
2763 rebuild_jump_labels (insns);
2764 cleanup_cfg (CLEANUP_EXPENSIVE | CLEANUP_PRE_LOOP);
2765 timevar_pop (TV_JUMP);
2767 if (flag_expensive_optimizations)
2769 timevar_push (TV_CSE);
2770 reg_scan (insns, max_reg_num (), 1);
2771 tem2 = cse_main (insns, max_reg_num (), 0, rtl_dump_file);
2772 purge_all_dead_edges (0);
2773 delete_trivially_dead_insns (insns, max_reg_num ());
2774 timevar_pop (TV_CSE);
2778 close_dump_file (DFI_gcse, print_rtl_with_bb, insns);
2779 timevar_pop (TV_GCSE);
2782 flag_cse_skip_blocks = save_csb;
2783 flag_cse_follow_jumps = save_cfj;
2784 #ifdef ENABLE_CHECKING
2785 verify_flow_info ();
2789 /* Move constant computations out of loops. */
2791 if (optimize > 0 && flag_loop_optimize)
2793 timevar_push (TV_LOOP);
2794 delete_dead_jumptables ();
2795 cleanup_cfg (CLEANUP_EXPENSIVE | CLEANUP_PRE_LOOP);
2796 open_dump_file (DFI_loop, decl);
2797 /* CFG is no longer maintained up-to-date. */
2798 free_bb_for_insn ();
2800 if (flag_rerun_loop_opt)
2802 cleanup_barriers ();
2804 /* We only want to perform unrolling once. */
2805 loop_optimize (insns, rtl_dump_file, LOOP_FIRST_PASS);
2807 /* The first call to loop_optimize makes some instructions
2808 trivially dead. We delete those instructions now in the
2809 hope that doing so will make the heuristics in loop work
2810 better and possibly speed up compilation. */
2811 delete_trivially_dead_insns (insns, max_reg_num ());
2813 /* The regscan pass is currently necessary as the alias
2814 analysis code depends on this information. */
2815 reg_scan (insns, max_reg_num (), 1);
2817 cleanup_barriers ();
2818 loop_optimize (insns, rtl_dump_file,
2819 (flag_unroll_loops ? LOOP_UNROLL : 0) | LOOP_BCT
2820 | (flag_prefetch_loop_arrays ? LOOP_PREFETCH : 0));
2822 /* Loop can create trivially dead instructions. */
2823 delete_trivially_dead_insns (insns, max_reg_num ());
2824 close_dump_file (DFI_loop, print_rtl, insns);
2825 timevar_pop (TV_LOOP);
2830 /* Do control and data flow analysis; wrote some of the results to
2833 timevar_push (TV_FLOW);
2834 open_dump_file (DFI_cfg, decl);
2836 find_basic_blocks (insns, max_reg_num (), rtl_dump_file);
2838 dump_flow_info (rtl_dump_file);
2839 cleanup_cfg ((optimize ? CLEANUP_EXPENSIVE : 0)
2840 | (flag_thread_jumps ? CLEANUP_THREADING : 0));
2842 /* It may make more sense to mark constant functions after dead code is
2843 eliminated by life_analyzis, but we need to do it early, as -fprofile-arcs
2844 may insert code making function non-constant, but we still must consider
2845 it as constant, otherwise -fbranch-probabilities will not read data back.
2847 life_analyzis rarely eliminates modification of external memory.
2850 mark_constant_function ();
2852 close_dump_file (DFI_cfg, print_rtl_with_bb, insns);
2854 /* Do branch profiling and static profile estimation passes. */
2855 if (optimize > 0 || profile_arc_flag || flag_test_coverage
2856 || flag_branch_probabilities)
2860 timevar_push (TV_BRANCH_PROB);
2861 open_dump_file (DFI_bp, decl);
2862 if (profile_arc_flag || flag_test_coverage || flag_branch_probabilities)
2865 /* Discover and record the loop depth at the head of each basic
2866 block. The loop infrastructure does the real job for us. */
2867 flow_loops_find (&loops, LOOP_TREE);
2869 /* Estimate using heuristics if no profiling info is available. */
2870 if (flag_guess_branch_prob)
2871 estimate_probability (&loops);
2874 flow_loops_dump (&loops, rtl_dump_file, NULL, 0);
2876 flow_loops_free (&loops);
2877 close_dump_file (DFI_bp, print_rtl_with_bb, insns);
2878 timevar_pop (TV_BRANCH_PROB);
2883 timevar_push (TV_CSE2);
2884 open_dump_file (DFI_cse2, decl);
2886 dump_flow_info (rtl_dump_file);
2888 if (flag_rerun_cse_after_loop)
2890 timevar_push (TV_JUMP);
2892 reg_scan (insns, max_reg_num (), 0);
2894 timevar_push (TV_IFCVT);
2895 cleanup_cfg (CLEANUP_EXPENSIVE);
2897 timevar_pop(TV_IFCVT);
2899 timevar_pop (TV_JUMP);
2900 /* CFG is no longer maintained up-to-date. */
2901 reg_scan (insns, max_reg_num (), 0);
2902 tem = cse_main (insns, max_reg_num (), 1, rtl_dump_file);
2903 purge_all_dead_edges (0);
2904 delete_trivially_dead_insns (insns, max_reg_num ());
2908 timevar_push (TV_JUMP);
2909 rebuild_jump_labels (insns);
2910 cleanup_cfg (CLEANUP_EXPENSIVE);
2911 timevar_pop (TV_JUMP);
2915 close_dump_file (DFI_cse2, print_rtl_with_bb, insns);
2916 timevar_pop (TV_CSE2);
2921 cse_not_expected = 1;
2923 open_dump_file (DFI_life, decl);
2926 check_function_return_warnings ();
2928 #ifdef ENABLE_CHECKING
2929 verify_flow_info ();
2931 life_analysis (insns, rtl_dump_file, PROP_FINAL);
2933 cleanup_cfg ((optimize ? CLEANUP_EXPENSIVE : 0) | CLEANUP_UPDATE_LIFE
2934 | (flag_thread_jumps ? CLEANUP_THREADING : 0));
2935 timevar_pop (TV_FLOW);
2939 if (warn_uninitialized || extra_warnings)
2941 uninitialized_vars_warning (DECL_INITIAL (decl));
2943 setjmp_args_warning ();
2949 if (initialize_uninitialized_subregs ())
2951 /* Insns were inserted, so things might look a bit different. */
2952 insns = get_insns ();
2953 update_life_info_in_dirty_blocks (UPDATE_LIFE_GLOBAL_RM_NOTES,
2954 PROP_LOG_LINKS | PROP_REG_INFO
2955 | PROP_DEATH_NOTES);
2959 close_dump_file (DFI_life, print_rtl_with_bb, insns);
2963 /* If -opt, try combining insns through substitution. */
2967 int rebuild_jump_labels_after_combine = 0;
2969 timevar_push (TV_COMBINE);
2970 open_dump_file (DFI_combine, decl);
2972 rebuild_jump_labels_after_combine
2973 = combine_instructions (insns, max_reg_num ());
2975 /* Combining insns may have turned an indirect jump into a
2976 direct jump. Rebuid the JUMP_LABEL fields of jumping
2978 if (rebuild_jump_labels_after_combine)
2980 timevar_push (TV_JUMP);
2981 rebuild_jump_labels (insns);
2982 timevar_pop (TV_JUMP);
2984 cleanup_cfg (CLEANUP_EXPENSIVE | CLEANUP_UPDATE_LIFE);
2987 close_dump_file (DFI_combine, print_rtl_with_bb, insns);
2988 timevar_pop (TV_COMBINE);
2993 /* Rerun if-conversion, as combine may have simplified things enough to
2994 now meet sequence length restrictions. */
2997 timevar_push (TV_IFCVT);
2998 open_dump_file (DFI_ce, decl);
3004 close_dump_file (DFI_ce, print_rtl_with_bb, insns);
3005 timevar_pop (TV_IFCVT);
3008 /* Register allocation pre-pass, to reduce number of moves
3009 necessary for two-address machines. */
3010 if (optimize > 0 && (flag_regmove || flag_expensive_optimizations))
3012 timevar_push (TV_REGMOVE);
3013 open_dump_file (DFI_regmove, decl);
3015 regmove_optimize (insns, max_reg_num (), rtl_dump_file);
3017 cleanup_cfg (CLEANUP_EXPENSIVE | CLEANUP_UPDATE_LIFE);
3018 close_dump_file (DFI_regmove, print_rtl_with_bb, insns);
3019 timevar_pop (TV_REGMOVE);
3024 /* Do unconditional splitting before register allocation to allow machine
3025 description to add extra information not needed previously. */
3026 split_all_insns (1);
3028 /* Any of the several passes since flow1 will have munged register
3029 lifetime data a bit. */
3030 register_life_up_to_date = 0;
3032 #ifdef OPTIMIZE_MODE_SWITCHING
3033 timevar_push (TV_MODE_SWITCH);
3036 optimize_mode_switching (NULL);
3039 timevar_pop (TV_MODE_SWITCH);
3042 timevar_push (TV_SCHED);
3044 #ifdef INSN_SCHEDULING
3046 /* Print function header into sched dump now
3047 because doing the sched analysis makes some of the dump. */
3048 if (optimize > 0 && flag_schedule_insns)
3050 open_dump_file (DFI_sched, decl);
3052 /* Do control and data sched analysis,
3053 and write some of the results to dump file. */
3055 schedule_insns (rtl_dump_file);
3057 close_dump_file (DFI_sched, print_rtl_with_bb, insns);
3059 /* Register lifetime information was updated as part of verifying
3061 register_life_up_to_date = 1;
3064 timevar_pop (TV_SCHED);
3068 /* Determine if the current function is a leaf before running reload
3069 since this can impact optimizations done by the prologue and
3070 epilogue thus changing register elimination offsets. */
3071 current_function_is_leaf = leaf_function_p ();
3073 timevar_push (TV_LOCAL_ALLOC);
3074 open_dump_file (DFI_lreg, decl);
3076 /* Allocate pseudo-regs that are used only within 1 basic block.
3078 RUN_JUMP_AFTER_RELOAD records whether or not we need to rerun the
3079 jump optimizer after register allocation and reloading are finished. */
3081 if (! register_life_up_to_date)
3082 recompute_reg_usage (insns, ! optimize_size);
3084 /* Allocate the reg_renumber array. */
3085 allocate_reg_info (max_regno, FALSE, TRUE);
3087 /* And the reg_equiv_memory_loc array. */
3088 reg_equiv_memory_loc = (rtx *) xcalloc (max_regno, sizeof (rtx));
3090 allocate_initial_values (reg_equiv_memory_loc);
3092 regclass (insns, max_reg_num (), rtl_dump_file);
3093 rebuild_label_notes_after_reload = local_alloc ();
3095 timevar_pop (TV_LOCAL_ALLOC);
3097 if (dump_file[DFI_lreg].enabled)
3099 timevar_push (TV_DUMP);
3101 dump_flow_info (rtl_dump_file);
3102 dump_local_alloc (rtl_dump_file);
3104 close_dump_file (DFI_lreg, print_rtl_with_bb, insns);
3105 timevar_pop (TV_DUMP);
3110 timevar_push (TV_GLOBAL_ALLOC);
3111 open_dump_file (DFI_greg, decl);
3113 /* If optimizing, allocate remaining pseudo-regs. Do the reload
3114 pass fixing up any insns that are invalid. */
3117 failure = global_alloc (rtl_dump_file);
3120 build_insn_chain (insns);
3121 failure = reload (insns, 0);
3124 timevar_pop (TV_GLOBAL_ALLOC);
3126 if (dump_file[DFI_greg].enabled)
3128 timevar_push (TV_DUMP);
3130 dump_global_regs (rtl_dump_file);
3132 close_dump_file (DFI_greg, print_rtl_with_bb, insns);
3133 timevar_pop (TV_DUMP);
3137 goto exit_rest_of_compilation;
3141 open_dump_file (DFI_postreload, decl);
3143 /* Do a very simple CSE pass over just the hard registers. */
3146 timevar_push (TV_RELOAD_CSE_REGS);
3147 reload_cse_regs (insns);
3148 timevar_pop (TV_RELOAD_CSE_REGS);
3151 /* Register allocation and reloading may have turned an indirect jump into
3152 a direct jump. If so, we must rebuild the JUMP_LABEL fields of
3153 jumping instructions. */
3154 if (rebuild_label_notes_after_reload)
3156 timevar_push (TV_JUMP);
3158 rebuild_jump_labels (insns);
3159 purge_all_dead_edges (0);
3161 timevar_pop (TV_JUMP);
3164 close_dump_file (DFI_postreload, print_rtl_with_bb, insns);
3166 /* Re-create the death notes which were deleted during reload. */
3167 timevar_push (TV_FLOW2);
3168 open_dump_file (DFI_flow2, decl);
3170 #ifdef ENABLE_CHECKING
3171 verify_flow_info ();
3174 /* If optimizing, then go ahead and split insns now. */
3176 split_all_insns (0);
3178 cleanup_cfg (optimize ? CLEANUP_EXPENSIVE : 0);
3180 /* On some machines, the prologue and epilogue code, or parts thereof,
3181 can be represented as RTL. Doing so lets us schedule insns between
3182 it and the rest of the code and also allows delayed branch
3183 scheduling to operate in the epilogue. */
3184 thread_prologue_and_epilogue_insns (insns);
3188 life_analysis (insns, rtl_dump_file, PROP_FINAL);
3189 cleanup_cfg (CLEANUP_EXPENSIVE | CLEANUP_UPDATE_LIFE
3190 | (flag_crossjumping ? CLEANUP_CROSSJUMP : 0));
3192 /* This is kind of a heuristic. We need to run combine_stack_adjustments
3193 even for machines with possibly nonzero RETURN_POPS_ARGS
3194 and ACCUMULATE_OUTGOING_ARGS. We expect that only ports having
3195 push instructions will have popping returns. */
3196 #ifndef PUSH_ROUNDING
3197 if (!ACCUMULATE_OUTGOING_ARGS)
3199 combine_stack_adjustments ();
3204 flow2_completed = 1;
3206 close_dump_file (DFI_flow2, print_rtl_with_bb, insns);
3207 timevar_pop (TV_FLOW2);
3209 #ifdef HAVE_peephole2
3210 if (optimize > 0 && flag_peephole2)
3212 timevar_push (TV_PEEPHOLE2);
3213 open_dump_file (DFI_peephole2, decl);
3215 peephole2_optimize (rtl_dump_file);
3217 close_dump_file (DFI_peephole2, print_rtl_with_bb, insns);
3218 timevar_pop (TV_PEEPHOLE2);
3222 if (flag_rename_registers || flag_cprop_registers)
3224 timevar_push (TV_RENAME_REGISTERS);
3225 open_dump_file (DFI_rnreg, decl);
3227 if (flag_rename_registers)
3228 regrename_optimize ();
3229 if (flag_cprop_registers)
3230 copyprop_hardreg_forward ();
3232 close_dump_file (DFI_rnreg, print_rtl_with_bb, insns);
3233 timevar_pop (TV_RENAME_REGISTERS);
3238 timevar_push (TV_IFCVT2);
3239 open_dump_file (DFI_ce2, decl);
3243 close_dump_file (DFI_ce2, print_rtl_with_bb, insns);
3244 timevar_pop (TV_IFCVT2);
3248 split_all_insns (1);
3251 #ifdef INSN_SCHEDULING
3252 if (optimize > 0 && flag_schedule_insns_after_reload)
3254 timevar_push (TV_SCHED2);
3255 open_dump_file (DFI_sched2, decl);
3257 /* Do control and data sched analysis again,
3258 and write some more of the results to dump file. */
3260 split_all_insns (1);
3262 schedule_insns (rtl_dump_file);
3264 close_dump_file (DFI_sched2, print_rtl_with_bb, insns);
3265 timevar_pop (TV_SCHED2);
3271 #ifdef LEAF_REGISTERS
3272 current_function_uses_only_leaf_regs
3273 = optimize > 0 && only_leaf_regs_used () && leaf_function_p ();
3277 timevar_push (TV_REG_STACK);
3278 open_dump_file (DFI_stack, decl);
3280 reg_to_stack (insns, rtl_dump_file);
3282 close_dump_file (DFI_stack, print_rtl_with_bb, insns);
3283 timevar_pop (TV_REG_STACK);
3289 timevar_push (TV_REORDER_BLOCKS);
3290 open_dump_file (DFI_bbro, decl);
3292 /* Last attempt to optimize CFG, as scheduling, peepholing
3293 and insn splitting possibly introduced more crossjumping
3295 cleanup_cfg (CLEANUP_EXPENSIVE | CLEANUP_POST_REGSTACK
3296 | (flag_crossjumping ? CLEANUP_CROSSJUMP : 0));
3297 if (flag_reorder_blocks)
3299 reorder_basic_blocks ();
3300 cleanup_cfg (CLEANUP_EXPENSIVE | CLEANUP_POST_REGSTACK);
3303 close_dump_file (DFI_bbro, print_rtl_with_bb, insns);
3304 timevar_pop (TV_REORDER_BLOCKS);
3306 compute_alignments ();
3308 /* CFG is no longer maintained up-to-date. */
3309 free_bb_for_insn ();
3311 /* If a machine dependent reorganization is needed, call it. */
3312 #ifdef MACHINE_DEPENDENT_REORG
3313 timevar_push (TV_MACH_DEP);
3314 open_dump_file (DFI_mach, decl);
3316 MACHINE_DEPENDENT_REORG (insns);
3318 close_dump_file (DFI_mach, print_rtl, insns);
3319 timevar_pop (TV_MACH_DEP);
3324 purge_line_number_notes (insns);
3325 cleanup_barriers ();
3327 /* If a scheduling pass for delayed branches is to be done,
3328 call the scheduling code. */
3331 if (optimize > 0 && flag_delayed_branch)
3333 timevar_push (TV_DBR_SCHED);
3334 open_dump_file (DFI_dbr, decl);
3336 dbr_schedule (insns, rtl_dump_file);
3338 close_dump_file (DFI_dbr, print_rtl, insns);
3339 timevar_pop (TV_DBR_SCHED);
3345 #if defined (HAVE_ATTR_length) && !defined (STACK_REGS)
3346 timevar_push (TV_SHORTEN_BRANCH);
3347 split_all_insns_noflow ();
3348 timevar_pop (TV_SHORTEN_BRANCH);
3351 convert_to_eh_region_ranges ();
3353 /* Shorten branches. */
3354 timevar_push (TV_SHORTEN_BRANCH);
3355 shorten_branches (get_insns ());
3356 timevar_pop (TV_SHORTEN_BRANCH);
3358 current_function_nothrow = nothrow_function_p ();
3359 if (current_function_nothrow)
3360 /* Now we know that this can't throw; set the flag for the benefit
3361 of other functions later in this translation unit. */
3362 TREE_NOTHROW (current_function_decl) = 1;
3364 /* Now turn the rtl into assembler code. */
3366 timevar_push (TV_FINAL);
3371 /* Get the function's name, as described by its RTL. This may be
3372 different from the DECL_NAME name used in the source file. */
3374 x = DECL_RTL (decl);
3375 if (GET_CODE (x) != MEM)
3378 if (GET_CODE (x) != SYMBOL_REF)
3380 fnname = XSTR (x, 0);
3382 assemble_start_function (decl, fnname);
3383 final_start_function (insns, asm_out_file, optimize);
3384 final (insns, asm_out_file, optimize, 0);
3385 final_end_function ();
3387 #ifdef IA64_UNWIND_INFO
3388 /* ??? The IA-64 ".handlerdata" directive must be issued before
3389 the ".endp" directive that closes the procedure descriptor. */
3390 output_function_exception_table ();
3393 assemble_end_function (decl, fnname);
3395 #ifndef IA64_UNWIND_INFO
3396 /* Otherwise, it feels unclean to switch sections in the middle. */
3397 output_function_exception_table ();
3401 fflush (asm_out_file);
3403 /* Release all memory allocated by flow. */
3404 free_basic_block_vars (0);
3406 /* Release all memory held by regsets now. */
3407 regset_release_memory ();
3409 timevar_pop (TV_FINAL);
3413 /* Write DBX symbols if requested. */
3415 /* Note that for those inline functions where we don't initially
3416 know for certain that we will be generating an out-of-line copy,
3417 the first invocation of this routine (rest_of_compilation) will
3418 skip over this code by doing a `goto exit_rest_of_compilation;'.
3419 Later on, finish_compilation will call rest_of_compilation again
3420 for those inline functions that need to have out-of-line copies
3421 generated. During that call, we *will* be routed past here. */
3423 timevar_push (TV_SYMOUT);
3424 (*debug_hooks->function_decl) (decl);
3425 timevar_pop (TV_SYMOUT);
3427 exit_rest_of_compilation:
3429 /* In case the function was not output,
3430 don't leave any temporary anonymous types
3431 queued up for sdb output. */
3432 #ifdef SDB_DEBUGGING_INFO
3433 if (write_symbols == SDB_DEBUG)
3434 sdbout_types (NULL_TREE);
3437 reload_completed = 0;
3438 flow2_completed = 0;
3441 timevar_push (TV_FINAL);
3443 /* Clear out the insn_length contents now that they are no
3445 init_insn_lengths ();
3447 /* Clear out the real_constant_chain before some of the rtx's
3448 it runs through become garbage. */
3449 clear_const_double_mem ();
3451 /* Show no temporary slots allocated. */
3454 free_basic_block_vars (0);
3455 free_bb_for_insn ();
3457 timevar_pop (TV_FINAL);
3459 /* Make sure volatile mem refs aren't considered valid operands for
3460 arithmetic insns. We must call this here if this is a nested inline
3461 function, since the above code leaves us in the init_recog state
3462 (from final.c), and the function context push/pop code does not
3463 save/restore volatile_ok.
3465 ??? Maybe it isn't necessary for expand_start_function to call this
3466 anymore if we do it here? */
3468 init_recog_no_volatile ();
3470 /* We're done with this function. Free up memory if we can. */
3471 free_after_parsing (cfun);
3472 if (! DECL_DEFER_OUTPUT (decl))
3474 free_after_compilation (cfun);
3476 /* Clear integrate.c's pointer to the cfun structure we just
3478 DECL_SAVED_INSNS (decl) = 0;
3484 timevar_pop (TV_REST_OF_COMPILATION);
3494 printf (_(" -ffixed-<register> Mark <register> as being unavailable to the compiler\n"));
3495 printf (_(" -fcall-used-<register> Mark <register> as being corrupted by function calls\n"));
3496 printf (_(" -fcall-saved-<register> Mark <register> as being preserved across functions\n"));
3497 printf (_(" -finline-limit=<number> Limits the size of inlined functions to <number>\n"));
3498 printf (_(" -fmessage-length=<number> Limits diagnostics messages lengths to <number> characters per line. 0 suppresses line-wrapping\n"));
3499 printf (_(" -fdiagnostics-show-location=[once | every-line] Indicates how often source location information should be emitted, as prefix, at the beginning of diagnostics when line-wrapping\n"));
3501 for (i = ARRAY_SIZE (f_options); i--;)
3503 const char *description = f_options[i].description;
3505 if (description != NULL && * description != 0)
3506 printf (" -f%-21s %s\n",
3507 f_options[i].string, _(description));
3510 printf (_(" -O[number] Set optimization level to [number]\n"));
3511 printf (_(" -Os Optimize for space rather than speed\n"));
3512 for (i = LAST_PARAM; i--;)
3514 const char *description = compiler_params[i].help;
3515 const int length = 21-strlen(compiler_params[i].option);
3517 if (description != NULL && * description != 0)
3518 printf (" --param %s=<value>%.*s%s\n",
3519 compiler_params[i].option,
3520 length > 0 ? length : 1, " ",
3523 printf (_(" -pedantic Issue warnings needed by strict compliance to ISO C\n"));
3524 printf (_(" -pedantic-errors Like -pedantic except that errors are produced\n"));
3525 printf (_(" -w Suppress warnings\n"));
3526 printf (_(" -W Enable extra warnings\n"));
3528 for (i = ARRAY_SIZE (W_options); i--;)
3530 const char *description = W_options[i].description;
3532 if (description != NULL && * description != 0)
3533 printf (" -W%-21s %s\n",
3534 W_options[i].string, _(description));
3537 printf (_(" -Wunused Enable unused warnings\n"));
3538 printf (_(" -Wlarger-than-<number> Warn if an object is larger than <number> bytes\n"));
3539 printf (_(" -p Enable function profiling\n"));
3540 #if defined (BLOCK_PROFILER) || defined (FUNCTION_BLOCK_PROFILER)
3541 printf (_(" -a Enable block profiling \n"));
3543 #if defined (BLOCK_PROFILER) || defined (FUNCTION_BLOCK_PROFILER) || defined FUNCTION_BLOCK_PROFILER_EXIT
3544 printf (_(" -ax Enable jump profiling \n"));
3546 printf (_(" -o <file> Place output into <file> \n"));
3548 -G <number> Put global and static data smaller than <number>\n\
3549 bytes into a special section (on some targets)\n"));
3551 for (i = ARRAY_SIZE (debug_args); i--;)
3553 if (debug_args[i].description != NULL)
3554 printf (" -g%-21s %s\n",
3555 debug_args[i].arg, _(debug_args[i].description));
3558 printf (_(" -aux-info <file> Emit declaration info into <file>\n"));
3559 printf (_(" -quiet Do not display functions compiled or elapsed time\n"));
3560 printf (_(" -version Display the compiler's version\n"));
3561 printf (_(" -d[letters] Enable dumps from specific passes of the compiler\n"));
3562 printf (_(" -dumpbase <file> Base name to be used for dumps from specific passes\n"));
3563 #if defined INSN_SCHEDULING
3564 printf (_(" -fsched-verbose=<number> Set the verbosity level of the scheduler\n"));
3566 printf (_(" --help Display this information\n"));
3571 /* Display descriptions of language specific options.
3572 If there is no description, note that there is an undocumented option.
3573 If the description is empty, do not display anything. (This allows
3574 options to be deliberately undocumented, for whatever reason).
3575 If the option string is missing, then this is a marker, indicating
3576 that the description string is in fact the name of a language, whose
3577 language specific options are to follow. */
3579 if (ARRAY_SIZE (documented_lang_options) > 1)
3581 printf (_("\nLanguage specific options:\n"));
3583 for (i = 0; i < ARRAY_SIZE (documented_lang_options); i++)
3585 const char *description = documented_lang_options[i].description;
3586 const char *option = documented_lang_options[i].option;
3588 if (description == NULL)
3593 printf (_(" %-23.23s [undocumented]\n"), option);
3595 else if (*description == 0)
3597 else if (option == NULL)
3601 (_("\nThere are undocumented %s specific options as well.\n"),
3605 printf (_("\n Options for %s:\n"), description);
3610 printf (" %-23.23s %s\n", option, _(description));
3615 printf (_("\nThere are undocumented %s specific options as well.\n"),
3618 display_target_options ();
3622 display_target_options ()
3625 static bool displayed = false;
3627 /* Avoid double printing for --help --target-help. */
3632 if (ARRAY_SIZE (target_switches) > 1
3633 #ifdef TARGET_OPTIONS
3634 || ARRAY_SIZE (target_options) > 1
3642 printf (_("\nTarget specific options:\n"));
3644 for (i = ARRAY_SIZE (target_switches); i--;)
3646 const char *option = target_switches[i].name;
3647 const char *description = target_switches[i].description;
3649 if (option == NULL || *option == 0)
3651 else if (description == NULL)
3656 printf (_(" -m%-23.23s [undocumented]\n"), option);
3658 else if (* description != 0)
3659 doc += printf (" -m%-23.23s %s\n", option, _(description));
3662 #ifdef TARGET_OPTIONS
3663 for (i = ARRAY_SIZE (target_options); i--;)
3665 const char *option = target_options[i].prefix;
3666 const char *description = target_options[i].description;
3668 if (option == NULL || *option == 0)
3670 else if (description == NULL)
3675 printf (_(" -m%-23.23s [undocumented]\n"), option);
3677 else if (* description != 0)
3678 doc += printf (" -m%-23.23s %s\n", option, _(description));
3684 printf (_("\nThere are undocumented target specific options as well.\n"));
3686 printf (_(" They exist, but they are not documented.\n"));
3691 /* Parse a -d... command line switch. */
3694 decode_d_option (arg)
3703 for (i = 0; i < (int) DFI_MAX; ++i)
3704 dump_file[i].enabled = 1;
3710 flag_print_asm_name = 1;
3713 flag_dump_rtl_in_asm = 1;
3714 flag_print_asm_name = 1;
3717 graph_dump_format = vcg;
3720 rtl_dump_and_exit = 1;
3723 (*lang_hooks.set_yydebug) (1);
3725 case 'D': /* These are handled by the preprocessor. */
3731 for (i = 0; i < (int) DFI_MAX; ++i)
3732 if (c == dump_file[i].debug_switch)
3734 dump_file[i].enabled = 1;
3739 warning ("unrecognized gcc debugging option: %c", c);
3744 /* Parse a -f... command line switch. ARG is the value after the -f.
3745 It is safe to access 'ARG - 2' to generate the full switch name.
3746 Return the number of strings consumed. */
3749 decode_f_option (arg)
3753 const char *option_value = NULL;
3755 /* Search for the option in the table of binary f options. */
3756 for (j = ARRAY_SIZE (f_options); j--;)
3758 if (!strcmp (arg, f_options[j].string))
3760 *f_options[j].variable = f_options[j].on_value;
3764 if (arg[0] == 'n' && arg[1] == 'o' && arg[2] == '-'
3765 && ! strcmp (arg + 3, f_options[j].string))
3767 *f_options[j].variable = ! f_options[j].on_value;
3772 if (!strcmp (arg, "fast-math"))
3773 set_fast_math_flags ();
3774 else if (!strcmp (arg, "no-fast-math"))
3775 set_no_fast_math_flags ();
3776 else if ((option_value = skip_leading_substring (arg, "inline-limit-"))
3777 || (option_value = skip_leading_substring (arg, "inline-limit=")))
3780 read_integral_parameter (option_value, arg - 2,
3782 set_param_value ("max-inline-insns", val);
3784 #ifdef INSN_SCHEDULING
3785 else if ((option_value = skip_leading_substring (arg, "sched-verbose=")))
3786 fix_sched_param ("verbose", option_value);
3788 else if ((option_value = skip_leading_substring (arg, "fixed-")))
3789 fix_register (option_value, 1, 1);
3790 else if ((option_value = skip_leading_substring (arg, "call-used-")))
3791 fix_register (option_value, 0, 1);
3792 else if ((option_value = skip_leading_substring (arg, "call-saved-")))
3793 fix_register (option_value, 0, 0);
3794 else if ((option_value = skip_leading_substring (arg, "align-loops=")))
3795 align_loops = read_integral_parameter (option_value, arg - 2, align_loops);
3796 else if ((option_value = skip_leading_substring (arg, "align-functions=")))
3798 = read_integral_parameter (option_value, arg - 2, align_functions);
3799 else if ((option_value = skip_leading_substring (arg, "align-jumps=")))
3800 align_jumps = read_integral_parameter (option_value, arg - 2, align_jumps);
3801 else if ((option_value = skip_leading_substring (arg, "align-labels=")))
3803 = read_integral_parameter (option_value, arg - 2, align_labels);
3804 else if ((option_value
3805 = skip_leading_substring (arg, "stack-limit-register=")))
3807 int reg = decode_reg_name (option_value);
3809 error ("unrecognized register name `%s'", option_value);
3811 stack_limit_rtx = gen_rtx_REG (Pmode, reg);
3813 else if ((option_value
3814 = skip_leading_substring (arg, "stack-limit-symbol=")))
3817 nm = ggc_strdup (option_value);
3818 stack_limit_rtx = gen_rtx_SYMBOL_REF (Pmode, nm);
3820 else if ((option_value
3821 = skip_leading_substring (arg, "message-length=")))
3822 output_set_maximum_length
3823 (&global_dc->buffer, read_integral_parameter
3824 (option_value, arg - 2, diagnostic_line_cutoff (global_dc)));
3825 else if ((option_value
3826 = skip_leading_substring (arg, "diagnostics-show-location=")))
3828 if (!strcmp (option_value, "once"))
3829 diagnostic_prefixing_rule (global_dc) = DIAGNOSTICS_SHOW_PREFIX_ONCE;
3830 else if (!strcmp (option_value, "every-line"))
3831 diagnostic_prefixing_rule (global_dc)
3832 = DIAGNOSTICS_SHOW_PREFIX_EVERY_LINE;
3834 error ("unrecognized option `%s'", arg - 2);
3836 else if (!strcmp (arg, "no-stack-limit"))
3837 stack_limit_rtx = NULL_RTX;
3838 else if (!strcmp (arg, "preprocessed"))
3839 /* Recognise this switch but do nothing. This prevents warnings
3840 about an unrecognized switch if cpplib has not been linked in. */
3848 /* Parse a -W... command line switch. ARG is the value after the -W.
3849 It is safe to access 'ARG - 2' to generate the full switch name.
3850 Return the number of strings consumed. */
3853 decode_W_option (arg)
3856 const char *option_value = NULL;
3859 /* Search for the option in the table of binary W options. */
3861 for (j = ARRAY_SIZE (W_options); j--;)
3863 if (!strcmp (arg, W_options[j].string))
3865 *W_options[j].variable = W_options[j].on_value;
3869 if (arg[0] == 'n' && arg[1] == 'o' && arg[2] == '-'
3870 && ! strcmp (arg + 3, W_options[j].string))
3872 *W_options[j].variable = ! W_options[j].on_value;
3877 if ((option_value = skip_leading_substring (arg, "id-clash-")))
3878 warning ("-Wid-clash-LEN is no longer supported");
3879 else if ((option_value = skip_leading_substring (arg, "larger-than-")))
3881 larger_than_size = read_integral_parameter (option_value, arg - 2, -1);
3883 warn_larger_than = larger_than_size != -1;
3885 else if (!strcmp (arg, "unused"))
3889 else if (!strcmp (arg, "no-unused"))
3899 /* Parse a -g... command line switch. ARG is the value after the -g.
3900 It is safe to access 'ARG - 2' to generate the full switch name.
3901 Return the number of strings consumed. */
3904 decode_g_option (arg)
3907 static unsigned level=0;
3908 /* A lot of code assumes write_symbols == NO_DEBUG if the
3909 debugging level is 0 (thus -gstabs1 -gstabs0 would lose track
3910 of what debugging type has been selected). This records the
3911 selected type. It is an error to specify more than one
3913 static enum debug_info_type selected_debug_type = NO_DEBUG;
3914 /* Non-zero if debugging format has been explicitly set.
3915 -g and -ggdb don't explicitly set the debugging format so
3916 -gdwarf -g3 is equivalent to -gdwarf3. */
3917 static int type_explicitly_set_p = 0;
3918 /* Indexed by enum debug_info_type. */
3919 static const char *const debug_type_names[] =
3921 "none", "stabs", "coff", "dwarf-1", "dwarf-2", "xcoff", "vms"
3924 /* The maximum admissible debug level value. */
3925 static const unsigned max_debug_level = 3;
3927 /* Look up ARG in the table. */
3928 for (da = debug_args; da->arg; da++)
3930 const int da_len = strlen (da->arg);
3932 if (da_len == 0 || ! strncmp (arg, da->arg, da_len))
3934 enum debug_info_type type = da->debug_type;
3935 const char *p = arg + da_len;
3937 if (*p && ! ISDIGIT (*p))
3940 /* A debug flag without a level defaults to level 2.
3941 Note we do not want to call read_integral_parameter
3942 for that case since it will call atoi which
3945 ??? We may want to generalize the interface to
3946 read_integral_parameter to better handle this case
3947 if this case shows up often. */
3949 level = read_integral_parameter (p, 0, max_debug_level + 1);
3951 level = (level == 0) ? 2 : level;
3953 if (da_len > 1 && *p && !strncmp (arg, "dwarf", da_len))
3955 error ("use -gdwarf -g%d for DWARF v1, level %d",
3958 error ("use -gdwarf-2 for DWARF v2");
3961 if (level > max_debug_level)
3964 ignoring option `%s' due to invalid debug level specification",
3966 level = debug_info_level;
3969 if (type == NO_DEBUG)
3971 type = PREFERRED_DEBUGGING_TYPE;
3973 if (da_len > 1 && strncmp (arg, "gdb", da_len) == 0)
3975 #ifdef DWARF2_DEBUGGING_INFO
3976 type = DWARF2_DEBUG;
3978 #ifdef DBX_DEBUGGING_INFO
3985 if (type == NO_DEBUG)
3986 warning ("`%s': unknown or unsupported -g option", arg - 2);
3988 /* Does it conflict with an already selected type? */
3989 if (type_explicitly_set_p
3990 /* -g/-ggdb don't conflict with anything. */
3991 && da->debug_type != NO_DEBUG
3992 && type != selected_debug_type)
3993 warning ("`%s' ignored, conflicts with `-g%s'",
3994 arg - 2, debug_type_names[(int) selected_debug_type]);
3997 /* If the format has already been set, -g/-ggdb
3998 only change the debug level. */
3999 if (type_explicitly_set_p && da->debug_type == NO_DEBUG)
4000 /* Don't change debugging type. */
4004 selected_debug_type = type;
4005 type_explicitly_set_p = da->debug_type != NO_DEBUG;
4008 write_symbols = (level == 0
4010 : selected_debug_type);
4011 use_gnu_debug_info_extensions = da->use_extensions_p;
4012 debug_info_level = (enum debug_info_level) level;
4025 /* Decode the first argument in the argv as a language-independent option.
4026 Return the number of strings consumed. */
4029 independent_decode_option (argc, argv)
4033 char *arg = argv[0];
4035 if (arg[0] != '-' || arg[1] == 0)
4047 if (!strcmp (arg, "-help"))
4050 exit_after_options = 1;
4053 if (!strcmp (arg, "-target-help"))
4055 display_target_options ();
4056 exit_after_options = 1;
4059 if (!strcmp (arg, "-version"))
4061 print_version (stderr, "");
4062 exit_after_options = 1;
4065 /* Handle '--param <name>=<value>'. */
4066 if (strcmp (arg, "-param") == 0)
4072 error ("-param option missing argument");
4076 /* Get the '<name>=<value>' parameter. */
4078 /* Look for the `='. */
4079 equal = strchr (arg, '=');
4081 error ("invalid --param option: %s", arg);
4086 /* Zero out the `=' sign so that we get two separate strings. */
4088 /* Figure out what value is specified. */
4089 val = read_integral_parameter (equal + 1, NULL, INVALID_PARAM_VAL);
4090 if (val != INVALID_PARAM_VAL)
4091 set_param_value (arg, val);
4093 error ("invalid parameter value `%s'", equal + 1);
4108 /* Already been treated in main (). Do nothing. */
4112 set_target_switch (arg + 1);
4116 return decode_f_option (arg + 1);
4119 return decode_g_option (arg + 1);
4122 if (!strcmp (arg, "dumpbase"))
4127 dump_base_name = argv[1];
4131 decode_d_option (arg + 1);
4135 if (!strcmp (arg, "pedantic"))
4137 else if (!strcmp (arg, "pedantic-errors"))
4138 flag_pedantic_errors = pedantic = 1;
4139 else if (arg[1] == 0)
4146 if (!strcmp (arg, "quiet"))
4153 if (!strcmp (arg, "version"))
4161 inhibit_warnings = 1;
4170 /* We save the value of warn_uninitialized, since if they put
4171 -Wuninitialized on the command line, we need to generate a
4172 warning about not using it without also specifying -O. */
4173 if (warn_uninitialized != 1)
4174 warn_uninitialized = 2;
4177 return decode_W_option (arg + 1);
4181 if (!strncmp (arg, "aux-info", 8))
4188 aux_info_file_name = argv[1];
4189 flag_gen_aux_info = 1;
4192 else if (arg[8] == '=')
4194 aux_info_file_name = arg + 9;
4195 flag_gen_aux_info = 1;
4210 asm_file_name = argv[1];
4225 g_switch_val = read_integral_parameter (argv[1], 0, -1);
4230 g_switch_val = read_integral_parameter (arg + 1, 0, -1);
4234 if (g_switch_val == -1)
4238 g_switch_set = TRUE;
4239 g_switch_value = g_switch_val;
4249 /* Decode -m switches. */
4250 /* Decode the switch -mNAME. */
4253 set_target_switch (name)
4257 int valid_target_option = 0;
4259 for (j = 0; j < ARRAY_SIZE (target_switches); j++)
4260 if (!strcmp (target_switches[j].name, name))
4262 if (target_switches[j].value < 0)
4263 target_flags &= ~-target_switches[j].value;
4265 target_flags |= target_switches[j].value;
4266 valid_target_option = 1;
4269 #ifdef TARGET_OPTIONS
4270 if (!valid_target_option)
4271 for (j = 0; j < ARRAY_SIZE (target_options); j++)
4273 int len = strlen (target_options[j].prefix);
4274 if (!strncmp (target_options[j].prefix, name, len))
4276 *target_options[j].variable = name + len;
4277 valid_target_option = 1;
4282 if (!valid_target_option)
4283 error ("invalid option `%s'", name);
4286 /* Print version information to FILE.
4287 Each line begins with INDENT (for the case where FILE is the
4288 assembler output file). */
4291 print_version (file, indent)
4296 #define __VERSION__ "[?]"
4300 "%s%s%s version %s (%s)\n%s\tcompiled by GNU C version %s.\n"
4302 "%s%s%s version %s (%s) compiled by CC.\n"
4304 , indent, *indent != 0 ? " " : "",
4305 lang_hooks.name, version_string, TARGET_NAME,
4306 indent, __VERSION__);
4309 /* Print an option value and return the adjusted position in the line.
4310 ??? We don't handle error returns from fprintf (disk full); presumably
4311 other code will catch a disk full though. */
4314 print_single_switch (file, pos, max, indent, sep, term, type, name)
4317 const char *indent, *sep, *term, *type, *name;
4319 /* The ultrix fprintf returns 0 on success, so compute the result we want
4320 here since we need it for the following test. */
4321 int len = strlen (sep) + strlen (type) + strlen (name);
4326 fprintf (file, "%s", term);
4331 fprintf (file, "%s", indent);
4332 pos = strlen (indent);
4334 fprintf (file, "%s%s%s", sep, type, name);
4339 /* Print active target switches to FILE.
4340 POS is the current cursor position and MAX is the size of a "line".
4341 Each line begins with INDENT and ends with TERM.
4342 Each switch is separated from the next by SEP. */
4345 print_switch_values (file, pos, max, indent, sep, term)
4348 const char *indent, *sep, *term;
4353 /* Print the options as passed. */
4355 pos = print_single_switch (file, pos, max, indent, *indent ? " " : "", term,
4356 _("options passed: "), "");
4358 for (p = &save_argv[1]; *p != NULL; p++)
4362 if (strcmp (*p, "-o") == 0)
4368 if (strcmp (*p, "-quiet") == 0)
4370 if (strcmp (*p, "-version") == 0)
4375 pos = print_single_switch (file, pos, max, indent, sep, term, *p, "");
4378 fprintf (file, "%s", term);
4380 /* Print the -f and -m options that have been enabled.
4381 We don't handle language specific options but printing argv
4384 pos = print_single_switch (file, 0, max, indent, *indent ? " " : "", term,
4385 _("options enabled: "), "");
4387 for (j = 0; j < ARRAY_SIZE (f_options); j++)
4388 if (*f_options[j].variable == f_options[j].on_value)
4389 pos = print_single_switch (file, pos, max, indent, sep, term,
4390 "-f", f_options[j].string);
4392 /* Print target specific options. */
4394 for (j = 0; j < ARRAY_SIZE (target_switches); j++)
4395 if (target_switches[j].name[0] != '\0'
4396 && target_switches[j].value > 0
4397 && ((target_switches[j].value & target_flags)
4398 == target_switches[j].value))
4400 pos = print_single_switch (file, pos, max, indent, sep, term,
4401 "-m", target_switches[j].name);
4404 #ifdef TARGET_OPTIONS
4405 for (j = 0; j < ARRAY_SIZE (target_options); j++)
4406 if (*target_options[j].variable != NULL)
4409 sprintf (prefix, "-m%s", target_options[j].prefix);
4410 pos = print_single_switch (file, pos, max, indent, sep, term,
4411 prefix, *target_options[j].variable);
4415 fprintf (file, "%s", term);
4418 /* Open assembly code output file. Do this even if -fsyntax-only is
4419 on, because then the driver will have provided the name of a
4420 temporary file or bit bucket for us. NAME is the file specified on
4421 the command line, possibly NULL. */
4423 init_asm_output (name)
4426 if (name == NULL && asm_file_name == 0)
4427 asm_out_file = stdout;
4430 if (asm_file_name == 0)
4432 int len = strlen (dump_base_name);
4433 char *dumpname = (char *) xmalloc (len + 6);
4434 memcpy (dumpname, dump_base_name, len + 1);
4435 strip_off_ending (dumpname, len);
4436 strcat (dumpname, ".s");
4437 asm_file_name = dumpname;
4439 if (!strcmp (asm_file_name, "-"))
4440 asm_out_file = stdout;
4442 asm_out_file = fopen (asm_file_name, "w");
4443 if (asm_out_file == 0)
4444 fatal_io_error ("can't open %s for writing", asm_file_name);
4447 #ifdef IO_BUFFER_SIZE
4448 setvbuf (asm_out_file, (char *) xmalloc (IO_BUFFER_SIZE),
4449 _IOFBF, IO_BUFFER_SIZE);
4452 if (!flag_syntax_only)
4454 #ifdef ASM_FILE_START
4455 ASM_FILE_START (asm_out_file);
4458 #ifdef ASM_COMMENT_START
4459 if (flag_verbose_asm)
4461 /* Print the list of options in effect. */
4462 print_version (asm_out_file, ASM_COMMENT_START);
4463 print_switch_values (asm_out_file, 0, MAX_LINE,
4464 ASM_COMMENT_START, " ", "\n");
4465 /* Add a blank line here so it appears in assembler output but not
4467 fprintf (asm_out_file, "\n");
4473 /* Initialization of the front end environment, before command line
4474 options are parsed. Signal handlers, internationalization etc.
4475 ARGV0 is main's argv[0]. */
4477 general_init (argv0)
4482 p = argv0 + strlen (argv0);
4483 while (p != argv0 && !IS_DIR_SEPARATOR (p[-1]))
4487 xmalloc_set_program_name (progname);
4489 gcc_init_libintl ();
4491 /* Trap fatal signals, e.g. SIGSEGV, and convert them to ICE messages. */
4493 signal (SIGSEGV, crash_signal);
4496 signal (SIGILL, crash_signal);
4499 signal (SIGBUS, crash_signal);
4502 signal (SIGABRT, crash_signal);
4504 #if defined SIGIOT && (!defined SIGABRT || SIGABRT != SIGIOT)
4505 signal (SIGIOT, crash_signal);
4508 signal (SIGFPE, crash_signal);
4511 /* Initialize the diagnostics reporting machinery, so option parsing
4512 can give warnings and errors. */
4513 diagnostic_initialize (global_dc);
4516 /* Parse command line options and set default flag values, called
4517 after language-independent option-independent initialization. Do
4518 minimal options processing. Outputting diagnostics is OK, but GC
4519 and identifier hashtables etc. are not initialized yet. */
4521 parse_options_and_default_flags (argc, argv)
4527 /* Save in case md file wants to emit args as a comment. */
4531 /* Initialize register usage now so switches may override. */
4534 /* Register the language-independent parameters. */
4535 add_params (lang_independent_params, LAST_PARAM);
4537 /* Perform language-specific options initialization. */
4538 (*lang_hooks.init_options) ();
4540 /* Scan to see what optimization level has been specified. That will
4541 determine the default value of many flags. */
4542 for (i = 1; i < argc; i++)
4544 if (!strcmp (argv[i], "-O"))
4549 else if (argv[i][0] == '-' && argv[i][1] == 'O')
4551 /* Handle -Os, -O2, -O3, -O69, ... */
4552 char *p = &argv[i][2];
4554 if ((p[0] == 's') && (p[1] == 0))
4558 /* Optimizing for size forces optimize to be 2. */
4563 const int optimize_val = read_integral_parameter (p, p - 2, -1);
4564 if (optimize_val != -1)
4566 optimize = optimize_val;
4575 flag_merge_constants = 0;
4581 flag_thread_jumps = 1;
4583 flag_delayed_branch = 1;
4585 #ifdef CAN_DEBUG_WITHOUT_FP
4586 flag_omit_frame_pointer = 1;
4588 flag_guess_branch_prob = 1;
4589 flag_cprop_registers = 1;
4590 flag_loop_optimize = 1;
4591 flag_crossjumping = 1;
4596 flag_optimize_sibling_calls = 1;
4597 flag_cse_follow_jumps = 1;
4598 flag_cse_skip_blocks = 1;
4600 flag_expensive_optimizations = 1;
4601 flag_strength_reduce = 1;
4602 flag_rerun_cse_after_loop = 1;
4603 flag_rerun_loop_opt = 1;
4604 flag_caller_saves = 1;
4607 #ifdef INSN_SCHEDULING
4608 flag_schedule_insns = 1;
4609 flag_schedule_insns_after_reload = 1;
4612 flag_strict_aliasing = 1;
4613 flag_delete_null_pointer_checks = 1;
4614 flag_reorder_blocks = 1;
4619 flag_inline_functions = 1;
4620 flag_rename_registers = 1;
4623 if (optimize < 2 || optimize_size)
4628 align_functions = 1;
4631 /* Initialize whether `char' is signed. */
4632 flag_signed_char = DEFAULT_SIGNED_CHAR;
4633 #ifdef DEFAULT_SHORT_ENUMS
4634 /* Initialize how much space enums occupy, by default. */
4635 flag_short_enums = DEFAULT_SHORT_ENUMS;
4638 /* Initialize target_flags before OPTIMIZATION_OPTIONS so the latter can
4641 set_target_switch ("");
4643 /* Unwind tables are always present in an ABI-conformant IA-64
4644 object file, so the default should be ON. */
4645 #ifdef IA64_UNWIND_INFO
4646 flag_unwind_tables = IA64_UNWIND_INFO;
4649 #ifdef OPTIMIZATION_OPTIONS
4650 /* Allow default optimizations to be specified on a per-machine basis. */
4651 OPTIMIZATION_OPTIONS (optimize, optimize_size);
4654 /* Perform normal command line switch decoding. */
4655 for (i = 1; i < argc;)
4658 int indep_processed;
4660 /* Give the language a chance to decode the option for itself. */
4661 lang_processed = (*lang_hooks.decode_option) (argc - i, argv + i);
4663 if (lang_processed >= 0)
4664 /* Now see if the option also has a language independent meaning.
4665 Some options are both language specific and language independent,
4667 indep_processed = independent_decode_option (argc - i, argv + i);
4670 lang_processed = -lang_processed;
4671 indep_processed = 0;
4674 if (lang_processed || indep_processed)
4675 i += MAX (lang_processed, indep_processed);
4678 const char *option = NULL;
4679 const char *lang = NULL;
4682 /* It is possible that the command line switch is not valid for the
4683 current language, but it is valid for another language. In order
4684 to be compatible with previous versions of the compiler (which
4685 did not issue an error message in this case) we check for this
4686 possibility here. If we do find a match, then if extra_warnings
4687 is set we generate a warning message, otherwise we will just
4688 ignore the option. */
4689 for (j = 0; j < ARRAY_SIZE (documented_lang_options); j++)
4691 option = documented_lang_options[j].option;
4694 lang = documented_lang_options[j].description;
4695 else if (! strncmp (argv[i], option, strlen (option)))
4699 if (j != ARRAY_SIZE (documented_lang_options))
4703 warning ("ignoring command line option '%s'", argv[i]);
4706 ("(it is valid for %s but not the selected language)",
4710 else if (argv[i][0] == '-' && argv[i][1] == 'g')
4711 warning ("`%s': unknown or unsupported -g option", &argv[i][2]);
4713 error ("unrecognized option `%s'", argv[i]);
4719 if (flag_no_inline == 2)
4722 flag_really_no_inline = flag_no_inline;
4724 /* Set flag_no_inline before the post_options () hook. The C front
4725 ends use it to determine tree inlining defaults. FIXME: such
4726 code should be lang-independent when all front ends use tree
4727 inlining, in which case it, and this condition, should be moved
4728 to the top of process_options() instead. */
4731 /* Inlining does not work if not optimizing,
4732 so force it not to be done. */
4736 /* The c_decode_option function and decode_option hook set
4737 this to `2' if -Wall is used, so we can avoid giving out
4738 lots of errors for people who don't realize what -Wall does. */
4739 if (warn_uninitialized == 1)
4740 warning ("-Wuninitialized is not supported without -O");
4743 if (flag_really_no_inline == 2)
4744 flag_really_no_inline = flag_no_inline;
4746 /* All command line options have been parsed; allow the front end to
4747 perform consistency checks, etc. */
4748 (*lang_hooks.post_options) ();
4751 /* Process the options that have been parsed. */
4755 #ifdef OVERRIDE_OPTIONS
4756 /* Some machines may reject certain combinations of options. */
4760 /* Set up the align_*_log variables, defaulting them to 1 if they
4761 were still unset. */
4762 if (align_loops <= 0) align_loops = 1;
4763 if (align_loops_max_skip > align_loops || !align_loops)
4764 align_loops_max_skip = align_loops - 1;
4765 align_loops_log = floor_log2 (align_loops * 2 - 1);
4766 if (align_jumps <= 0) align_jumps = 1;
4767 if (align_jumps_max_skip > align_jumps || !align_jumps)
4768 align_jumps_max_skip = align_jumps - 1;
4769 align_jumps_log = floor_log2 (align_jumps * 2 - 1);
4770 if (align_labels <= 0) align_labels = 1;
4771 align_labels_log = floor_log2 (align_labels * 2 - 1);
4772 if (align_labels_max_skip > align_labels || !align_labels)
4773 align_labels_max_skip = align_labels - 1;
4774 if (align_functions <= 0) align_functions = 1;
4775 align_functions_log = floor_log2 (align_functions * 2 - 1);
4777 /* Unrolling all loops implies that standard loop unrolling must also
4779 if (flag_unroll_all_loops)
4780 flag_unroll_loops = 1;
4781 /* Loop unrolling requires that strength_reduction be on also. Silently
4782 turn on strength reduction here if it isn't already on. Also, the loop
4783 unrolling code assumes that cse will be run after loop, so that must
4784 be turned on also. */
4785 if (flag_unroll_loops)
4787 flag_strength_reduce = 1;
4788 flag_rerun_cse_after_loop = 1;
4791 if (flag_non_call_exceptions)
4792 flag_asynchronous_unwind_tables = 1;
4793 if (flag_asynchronous_unwind_tables)
4794 flag_unwind_tables = 1;
4796 /* Warn about options that are not supported on this machine. */
4797 #ifndef INSN_SCHEDULING
4798 if (flag_schedule_insns || flag_schedule_insns_after_reload)
4799 warning ("instruction scheduling not supported on this target machine");
4802 if (flag_delayed_branch)
4803 warning ("this target machine does not have delayed branches");
4806 /* Some operating systems do not allow profiling without a frame
4808 if (!TARGET_ALLOWS_PROFILING_WITHOUT_FRAME_POINTER
4810 && flag_omit_frame_pointer)
4812 error ("profiling does not work without a frame pointer");
4813 flag_omit_frame_pointer = 0;
4816 user_label_prefix = USER_LABEL_PREFIX;
4817 if (flag_leading_underscore != -1)
4819 /* If the default prefix is more complicated than "" or "_",
4820 issue a warning and ignore this option. */
4821 if (user_label_prefix[0] == 0 ||
4822 (user_label_prefix[0] == '_' && user_label_prefix[1] == 0))
4824 user_label_prefix = flag_leading_underscore ? "_" : "";
4827 warning ("-f%sleading-underscore not supported on this target machine",
4828 flag_leading_underscore ? "" : "no-");
4831 /* If we are in verbose mode, write out the version and maybe all the
4832 option flags in use. */
4835 print_version (stderr, "");
4837 print_switch_values (stderr, 0, MAX_LINE, "", " ", "\n");
4843 if (flag_syntax_only)
4845 write_symbols = NO_DEBUG;
4849 /* Now we know write_symbols, set up the debug hooks based on it.
4850 By default we do nothing for debug output. */
4851 #if defined(DBX_DEBUGGING_INFO)
4852 if (write_symbols == DBX_DEBUG)
4853 debug_hooks = &dbx_debug_hooks;
4855 #if defined(XCOFF_DEBUGGING_INFO)
4856 if (write_symbols == XCOFF_DEBUG)
4857 debug_hooks = &xcoff_debug_hooks;
4859 #ifdef SDB_DEBUGGING_INFO
4860 if (write_symbols == SDB_DEBUG)
4861 debug_hooks = &sdb_debug_hooks;
4863 #ifdef DWARF_DEBUGGING_INFO
4864 if (write_symbols == DWARF_DEBUG)
4865 debug_hooks = &dwarf_debug_hooks;
4867 #ifdef DWARF2_DEBUGGING_INFO
4868 if (write_symbols == DWARF2_DEBUG)
4869 debug_hooks = &dwarf2_debug_hooks;
4871 #ifdef VMS_DEBUGGING_INFO
4872 if (write_symbols == VMS_DEBUG || write_symbols == VMS_AND_DWARF2_DEBUG)
4873 debug_hooks = &vmsdbg_debug_hooks;
4876 /* If auxiliary info generation is desired, open the output file.
4877 This goes in the same directory as the source file--unlike
4878 all the other output files. */
4879 if (flag_gen_aux_info)
4881 aux_info_file = fopen (aux_info_file_name, "w");
4882 if (aux_info_file == 0)
4883 fatal_io_error ("can't open %s", aux_info_file_name);
4886 if (! targetm.have_named_sections)
4888 if (flag_function_sections)
4890 warning ("-ffunction-sections not supported for this target");
4891 flag_function_sections = 0;
4893 if (flag_data_sections)
4895 warning ("-fdata-sections not supported for this target");
4896 flag_data_sections = 0;
4900 if (flag_function_sections && profile_flag)
4902 warning ("-ffunction-sections disabled; it makes profiling impossible");
4903 flag_function_sections = 0;
4906 #ifndef HAVE_prefetch
4907 if (flag_prefetch_loop_arrays)
4909 warning ("-fprefetch-loop-arrays not supported for this target");
4910 flag_prefetch_loop_arrays = 0;
4913 if (flag_prefetch_loop_arrays && !HAVE_prefetch)
4915 warning ("-fprefetch-loop-arrays not supported for this target (try -march switches)");
4916 flag_prefetch_loop_arrays = 0;
4920 /* This combination of options isn't handled for i386 targets and doesn't
4921 make much sense anyway, so don't allow it. */
4922 if (flag_prefetch_loop_arrays && optimize_size)
4924 warning ("-fprefetch-loop-arrays is not supported with -Os");
4925 flag_prefetch_loop_arrays = 0;
4928 #ifndef OBJECT_FORMAT_ELF
4929 if (flag_function_sections && write_symbols != NO_DEBUG)
4930 warning ("-ffunction-sections may affect debugging on some targets");
4934 /* Language-independent initialization, before language-dependent
4937 lang_independent_init ()
4939 /* Initialize the garbage-collector, and string pools. */
4941 ggc_add_rtx_root (&stack_limit_rtx, 1);
4942 ggc_add_tree_root (¤t_function_decl, 1);
4943 ggc_add_tree_root (¤t_function_func_begin_label, 1);
4948 init_emit_once (debug_info_level == DINFO_LEVEL_NORMAL
4949 || debug_info_level == DINFO_LEVEL_VERBOSE
4950 #ifdef VMS_DEBUGGING_INFO
4951 /* Enable line number info for traceback */
4952 || debug_info_level > DINFO_LEVEL_NONE
4954 || flag_test_coverage
4955 || warn_notreached);
4961 init_function_once ();
4962 init_stor_layout_once ();
4963 init_varasm_once ();
4964 init_EXPR_INSN_LIST_cache ();
4966 /* The following initialization functions need to generate rtl, so
4967 provide a dummy function context for them. */
4968 init_dummy_function_start ();
4971 if (flag_caller_saves)
4972 init_caller_save ();
4973 expand_dummy_function_end ();
4976 /* Language-dependent initialization. Returns non-zero on success. */
4978 lang_dependent_init (name)
4981 if (dump_base_name == 0)
4982 dump_base_name = name ? name : "gccdump";
4984 /* Front-end initialization. This hook can assume that GC,
4985 identifier hashes etc. are set up, but debug initialization is
4986 not done yet. This routine must return the original filename
4987 (e.g. foo.i -> foo.c) so can correctly initialize debug output. */
4988 name = (*lang_hooks.init) (name);
4992 /* Is this duplication necessary? */
4993 name = ggc_strdup (name);
4994 main_input_filename = input_filename = name;
4995 init_asm_output (name);
4997 /* These create various _DECL nodes, so need to be called after the
4998 front end is initialized. */
5002 /* Put an entry on the input file stack for the main input file. */
5003 push_srcloc (input_filename, 0);
5005 /* If dbx symbol table desired, initialize writing it and output the
5006 predefined types. */
5007 timevar_push (TV_SYMOUT);
5009 #ifdef DWARF2_UNWIND_INFO
5010 if (dwarf2out_do_frame ())
5011 dwarf2out_frame_init ();
5014 /* Now we have the correct original filename, we can initialize
5016 (*debug_hooks->init) (name);
5018 timevar_pop (TV_SYMOUT);
5023 /* Clean up: close opened files, etc. */
5028 /* Close the dump files. */
5029 if (flag_gen_aux_info)
5031 fclose (aux_info_file);
5033 unlink (aux_info_file_name);
5036 /* Close non-debugging input and output files. Take special care to note
5037 whether fclose returns an error, since the pages might still be on the
5038 buffer chain while the file is open. */
5042 if (ferror (asm_out_file) != 0)
5043 fatal_io_error ("error writing to %s", asm_file_name);
5044 if (fclose (asm_out_file) != 0)
5045 fatal_io_error ("error closing %s", asm_file_name);
5048 /* Do whatever is necessary to finish printing the graphs. */
5049 if (graph_dump_format != no_graph)
5053 for (i = 0; i < (int) DFI_MAX; ++i)
5054 if (dump_file[i].initialized && dump_file[i].graph_dump_p)
5059 sprintf (seq, DUMPFILE_FORMAT, i);
5060 suffix = concat (seq, dump_file[i].extension, NULL);
5061 finish_graph_dump_file (dump_base_name, suffix);
5068 ggc_print_statistics ();
5069 stringpool_statistics ();
5070 dump_tree_statistics ();
5073 /* Free up memory for the benefit of leak detectors. */
5076 /* Language-specific end of compilation actions. */
5077 (*lang_hooks.finish) ();
5080 /* Initialize the compiler, and compile the input file. */
5084 /* The bulk of command line switch processing. */
5087 /* We cannot start timing until after options are processed since that
5088 says if we run timers or not. */
5090 timevar_start (TV_TOTAL);
5092 /* Language-independent initialization. Also sets up GC, identifier
5094 lang_independent_init ();
5096 /* Language-dependent initialization. Returns true on success. */
5097 if (lang_dependent_init (filename))
5102 /* Stop timing and print the times. */
5103 timevar_stop (TV_TOTAL);
5104 timevar_print (stderr);
5107 /* Entry point of cc1, cc1plus, jc1, f771, etc.
5108 Decode command args, then call compile_file.
5109 Exit code is FATAL_EXIT_CODE if can't open files or if there were
5110 any errors, or SUCCESS_EXIT_CODE if compilation succeeded.
5112 It is not safe to call this function more than once. */
5115 toplev_main (argc, argv)
5121 /* Initialization of GCC's environment, and diagnostics. */
5122 general_init (argv [0]);
5124 /* Parse the options and do minimal processing; basically just
5125 enough to default flags appropriately. */
5126 parse_options_and_default_flags (argc, argv);
5128 /* Exit early if we can (e.g. -help). */
5129 if (!exit_after_options)
5132 if (errorcount || sorrycount)
5133 return (FATAL_EXIT_CODE);
5135 return (SUCCESS_EXIT_CODE);