1 /* Top level of GNU C compiler
2 Copyright (C) 1987, 1988, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
3 1999, 2000 Free Software Foundation, Inc.
5 This file is part of GNU CC.
7 GNU CC is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
12 GNU CC is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GNU CC; see the file COPYING. If not, write to
19 the Free Software Foundation, 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
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. */
34 #ifdef HAVE_SYS_RESOURCE_H
35 # include <sys/resource.h>
38 #ifdef HAVE_SYS_TIMES_H
39 # include <sys/times.h>
47 #include "insn-attr.h"
48 #include "insn-codes.h"
49 #include "insn-config.h"
50 #include "hard-reg-set.h"
58 #include "basic-block.h"
65 #include "diagnostic.h"
68 #ifndef ACCUMULATE_OUTGOING_ARGS
69 #define ACCUMULATE_OUTGOING_ARGS 0
72 #ifdef DWARF_DEBUGGING_INFO
76 #if defined (DWARF2_UNWIND_INFO) || defined (DWARF2_DEBUGGING_INFO)
77 #include "dwarf2out.h"
80 #if defined(DBX_DEBUGGING_INFO) || defined(XCOFF_DEBUGGING_INFO)
84 #ifdef SDB_DEBUGGING_INFO
88 #ifdef XCOFF_DEBUGGING_INFO
93 /* The extra parameters substantially improve the I/O performance. */
96 vms_fopen (fname, type)
100 /* The <stdio.h> in the gcc-vms-1.42 distribution prototypes fopen with two
101 fixed arguments, which matches ANSI's specification but not VAXCRTL's
102 pre-ANSI implementation. This hack circumvents the mismatch problem. */
103 FILE *(*vmslib_fopen)() = (FILE *(*)()) fopen;
106 return (*vmslib_fopen) (fname, type, "mbc=32",
107 "deq=64", "fop=tef", "shr=nil");
109 return (*vmslib_fopen) (fname, type, "mbc=32");
112 #define fopen vms_fopen
115 #ifndef DEFAULT_GDB_EXTENSIONS
116 #define DEFAULT_GDB_EXTENSIONS 1
119 /* If more than one debugging type is supported, you must define
120 PREFERRED_DEBUGGING_TYPE to choose a format in a system-dependent way.
122 This is one long line cause VAXC can't handle a \-newline. */
123 #if 1 < (defined (DBX_DEBUGGING_INFO) + defined (SDB_DEBUGGING_INFO) + defined (DWARF_DEBUGGING_INFO) + defined (DWARF2_DEBUGGING_INFO) + defined (XCOFF_DEBUGGING_INFO))
124 #ifndef PREFERRED_DEBUGGING_TYPE
125 You Lose! You must define PREFERRED_DEBUGGING_TYPE!
126 #endif /* no PREFERRED_DEBUGGING_TYPE */
127 #else /* Only one debugging format supported. Define PREFERRED_DEBUGGING_TYPE
128 so the following code needn't care. */
129 #ifdef DBX_DEBUGGING_INFO
130 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
132 #ifdef SDB_DEBUGGING_INFO
133 #define PREFERRED_DEBUGGING_TYPE SDB_DEBUG
135 #ifdef DWARF_DEBUGGING_INFO
136 #define PREFERRED_DEBUGGING_TYPE DWARF_DEBUG
138 #ifdef DWARF2_DEBUGGING_INFO
139 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
141 #ifdef XCOFF_DEBUGGING_INFO
142 #define PREFERRED_DEBUGGING_TYPE XCOFF_DEBUG
144 #endif /* More than one debugger format enabled. */
146 /* If still not defined, must have been because no debugging formats
148 #ifndef PREFERRED_DEBUGGING_TYPE
149 #define PREFERRED_DEBUGGING_TYPE NO_DEBUG
152 #if defined (HAVE_DECL_ENVIRON) && !HAVE_DECL_ENVIRON
153 extern char **environ;
156 /* Carry information from ASM_DECLARE_OBJECT_NAME
157 to ASM_FINISH_DECLARE_OBJECT. */
159 extern int size_directive_output;
160 extern tree last_assemble_variable_decl;
162 static void set_target_switch PARAMS ((const char *));
163 static const char *decl_name PARAMS ((tree, int));
165 static void float_signal PARAMS ((int)) ATTRIBUTE_NORETURN;
166 static void crash_signal PARAMS ((int)) ATTRIBUTE_NORETURN;
167 #ifdef ASM_IDENTIFY_LANGUAGE
168 /* This might or might not be used in ASM_IDENTIFY_LANGUAGE. */
169 static void output_lang_identify PARAMS ((FILE *)) ATTRIBUTE_UNUSED;
171 static void compile_file PARAMS ((const char *));
172 static void display_help PARAMS ((void));
173 static void display_target_options PARAMS ((void));
175 static void decode_d_option PARAMS ((const char *));
176 static int decode_f_option PARAMS ((const char *));
177 static int decode_W_option PARAMS ((const char *));
178 static int decode_g_option PARAMS ((const char *));
179 static unsigned int independent_decode_option PARAMS ((int, char **));
181 static void print_version PARAMS ((FILE *, const char *));
182 static int print_single_switch PARAMS ((FILE *, int, int, const char *,
183 const char *, const char *,
184 const char *, const char *));
185 static void print_switch_values PARAMS ((FILE *, int, int, const char *,
186 const char *, const char *));
188 /* Length of line when printing switch values. */
191 /* Name of program invoked, sans directories. */
193 const char *progname;
195 /* Copy of arguments to main. */
199 /* Name of current original source file (what was input to cpp).
200 This comes from each #-command in the actual input. */
202 const char *input_filename;
204 /* Name of top-level original source file (what was input to cpp).
205 This comes from the #-command at the beginning of the actual input.
206 If there isn't any there, then this is the cc1 input file name. */
208 const char *main_input_filename;
210 /* Current line number in real source file. */
214 /* Nonzero if it is unsafe to create any new pseudo registers. */
217 /* Stack of currently pending input files. */
219 struct file_stack *input_file_stack;
221 /* Incremented on each change to input_file_stack. */
222 int input_file_stack_tick;
224 /* Name to use as base of names for dump output files. */
226 const char *dump_base_name;
228 /* Bit flags that specify the machine subtype we are compiling for.
229 Bits are tested using macros TARGET_... defined in the tm.h file
230 and set by `-m...' switches. Must be defined in rtlanal.c. */
232 extern int target_flags;
234 /* Describes a dump file. */
236 struct dump_file_info
238 /* The unique extension to apply, e.g. ".jump". */
239 const char *const extension;
241 /* The -d<c> character that enables this dump file. */
242 char const debug_switch;
244 /* True if there is a corresponding graph dump file. */
245 char const graph_dump_p;
247 /* True if the user selected this dump. */
250 /* True if the files have been initialized (ie truncated). */
254 /* Enumerate the extant dump files. */
292 /* Describes all the dump files. Should be kept in order of the
293 pass and in sync with dump_file_index above.
295 Remaining -d letters:
301 struct dump_file_info dump_file[DFI_MAX] =
303 { "rtl", 'r', 0, 0, 0 },
304 { "sibling", 'i', 0, 0, 0 },
305 { "jump", 'j', 0, 0, 0 },
306 { "cse", 's', 0, 0, 0 },
307 { "addressof", 'F', 0, 0, 0 },
308 { "ssa", 'e', 1, 0, 0 },
309 { "dce", 'X', 1, 0, 0 },
310 { "ussa", 'e', 1, 0, 0 }, /* Yes, duplicate enable switch. */
311 { "gcse", 'G', 1, 0, 0 },
312 { "loop", 'L', 1, 0, 0 },
313 { "cse2", 't', 1, 0, 0 },
314 { "cfg", 'f', 1, 0, 0 },
315 { "bp", 'b', 1, 0, 0 },
316 { "life", 'f', 1, 0, 0 }, /* Yes, duplicate enable switch. */
317 { "combine", 'c', 1, 0, 0 },
318 { "ce", 'C', 1, 0, 0 },
319 { "regmove", 'N', 1, 0, 0 },
320 { "sched", 'S', 1, 0, 0 },
321 { "lreg", 'l', 1, 0, 0 },
322 { "greg", 'g', 1, 0, 0 },
323 { "postreload", 'o', 1, 0, 0 },
324 { "flow2", 'w', 1, 0, 0 },
325 { "peephole2", 'z', 1, 0, 0 },
326 { "rnreg", 'n', 1, 0, 0 },
327 { "ce2", 'E', 1, 0, 0 },
328 { "sched2", 'R', 1, 0, 0 },
329 { "bbro", 'B', 1, 0, 0 },
330 { "jump2", 'J', 1, 0, 0 },
331 { "mach", 'M', 1, 0, 0 },
332 { "dbr", 'd', 0, 0, 0 },
333 { "stack", 'k', 1, 0, 0 },
336 static int open_dump_file PARAMS ((enum dump_file_index, tree));
337 static void close_dump_file PARAMS ((enum dump_file_index,
338 void (*) (FILE *, rtx), rtx));
340 /* Other flags saying which kinds of debugging dump have been requested. */
342 int rtl_dump_and_exit;
343 int flag_print_asm_name;
344 static int flag_print_mem;
345 static int version_flag;
346 static char *filename;
347 enum graph_dump_types graph_dump_format;
349 /* Name for output file of assembly code, specified with -o. */
353 /* Value of the -G xx switch, and whether it was passed or not. */
357 /* Type(s) of debugging information we are producing (if any).
358 See flags.h for the definitions of the different possible
359 types of debugging information. */
360 enum debug_info_type write_symbols = NO_DEBUG;
362 /* Level of debugging information we are producing. See flags.h
363 for the definitions of the different possible levels. */
364 enum debug_info_level debug_info_level = DINFO_LEVEL_NONE;
366 /* Nonzero means use GNU-only extensions in the generated symbolic
367 debugging information. */
368 /* Currently, this only has an effect when write_symbols is set to
369 DBX_DEBUG, XCOFF_DEBUG, or DWARF_DEBUG. */
370 int use_gnu_debug_info_extensions = 0;
372 /* Nonzero means do optimizations. -O.
373 Particular numeric values stand for particular amounts of optimization;
374 thus, -O2 stores 2 here. However, the optimizations beyond the basic
375 ones are not controlled directly by this variable. Instead, they are
376 controlled by individual `flag_...' variables that are defaulted
377 based on this variable. */
381 /* Nonzero means optimize for size. -Os.
382 The only valid values are zero and non-zero. When optimize_size is
383 non-zero, optimize defaults to 2, but certain individual code
384 bloating optimizations are disabled. */
386 int optimize_size = 0;
388 /* Number of error messages and warning messages so far. */
391 int warningcount = 0;
394 /* The FUNCTION_DECL for the function currently being compiled,
395 or 0 if between functions. */
396 tree current_function_decl;
398 /* Set to the FUNC_BEGIN label of the current function, or NULL_TREE
400 tree current_function_func_begin_label;
402 /* Pointer to function to compute the name to use to print a declaration.
403 DECL is the declaration in question.
404 VERBOSITY determines what information will be printed:
405 0: DECL_NAME, demangled as necessary.
406 1: and scope information.
407 2: and any other information that might be interesting, such as function
408 parameter types in C++. */
410 const char *(*decl_printable_name) PARAMS ((tree, int));
412 /* Pointer to function to compute rtl for a language-specific tree code. */
414 typedef rtx (*lang_expand_expr_t)
415 PARAMS ((union tree_node *, rtx, enum machine_mode,
416 enum expand_modifier modifier));
418 lang_expand_expr_t lang_expand_expr = 0;
420 tree (*lang_expand_constant) PARAMS ((tree)) = 0;
422 /* Pointer to function to finish handling an incomplete decl at the
423 end of compilation. */
425 void (*incomplete_decl_finalize_hook) PARAMS ((tree)) = 0;
427 /* Nonzero if doing dwarf2 duplicate elimination. */
429 int flag_eliminate_dwarf2_dups = 0;
431 /* Nonzero if generating code to do profiling. */
433 int profile_flag = 0;
435 /* Nonzero if generating code to do profiling on a line-by-line basis. */
437 int profile_block_flag;
439 /* Nonzero if generating code to profile program flow graph arcs. */
441 int profile_arc_flag = 0;
443 /* Nonzero if generating info for gcov to calculate line test coverage. */
445 int flag_test_coverage = 0;
447 /* Nonzero indicates that branch taken probabilities should be calculated. */
449 int flag_branch_probabilities = 0;
451 /* Nonzero if basic blocks should be reordered. */
453 int flag_reorder_blocks = 0;
455 /* Nonzero if registers should be renamed. */
457 int flag_rename_registers = 0;
459 /* Nonzero for -pedantic switch: warn about anything
460 that standard spec forbids. */
464 /* Temporarily suppress certain warnings.
465 This is set while reading code from a system header file. */
467 int in_system_header = 0;
469 /* Don't print functions as they are compiled. -quiet. */
473 /* Print times taken by the various passes. -ftime-report. */
477 /* Print memory still in use at end of compilation (which may have little
478 to do with peak memory consumption). -fmem-report. */
482 /* Non-zero means to collect statistics which might be expensive
483 and to print them when we are done. */
484 int flag_detailed_statistics = 0;
489 /* Nonzero means `char' should be signed. */
491 int flag_signed_char;
493 /* Nonzero means give an enum type only as many bytes as it needs. */
495 int flag_short_enums;
497 /* Nonzero for -fcaller-saves: allocate values in regs that need to
498 be saved across function calls, if that produces overall better code.
499 Optional now, so people can test it. */
501 #ifdef DEFAULT_CALLER_SAVES
502 int flag_caller_saves = 1;
504 int flag_caller_saves = 0;
507 /* Nonzero if structures and unions should be returned in memory.
509 This should only be defined if compatibility with another compiler or
510 with an ABI is needed, because it results in slower code. */
512 #ifndef DEFAULT_PCC_STRUCT_RETURN
513 #define DEFAULT_PCC_STRUCT_RETURN 1
516 /* Nonzero for -fpcc-struct-return: return values the same way PCC does. */
518 int flag_pcc_struct_return = DEFAULT_PCC_STRUCT_RETURN;
520 /* Nonzero for -fforce-mem: load memory value into a register
521 before arithmetic on it. This makes better cse but slower compilation. */
523 int flag_force_mem = 0;
525 /* Nonzero for -fforce-addr: load memory address into a register before
526 reference to memory. This makes better cse but slower compilation. */
528 int flag_force_addr = 0;
530 /* Nonzero for -fdefer-pop: don't pop args after each function call;
531 instead save them up to pop many calls' args with one insns. */
533 int flag_defer_pop = 0;
535 /* Nonzero for -ffloat-store: don't allocate floats and doubles
536 in extended-precision registers. */
538 int flag_float_store = 0;
540 /* Nonzero for -fcse-follow-jumps:
541 have cse follow jumps to do a more extensive job. */
543 int flag_cse_follow_jumps;
545 /* Nonzero for -fcse-skip-blocks:
546 have cse follow a branch around a block. */
547 int flag_cse_skip_blocks;
549 /* Nonzero for -fexpensive-optimizations:
550 perform miscellaneous relatively-expensive optimizations. */
551 int flag_expensive_optimizations;
553 /* Nonzero for -fthread-jumps:
554 have jump optimize output of loop. */
556 int flag_thread_jumps;
558 /* Nonzero enables strength-reduction in loop.c. */
560 int flag_strength_reduce = 0;
562 /* Nonzero enables loop unrolling in unroll.c. Only loops for which the
563 number of iterations can be calculated at compile-time (UNROLL_COMPLETELY,
564 UNROLL_MODULO) or at run-time (preconditioned to be UNROLL_MODULO) are
567 int flag_unroll_loops;
569 /* Nonzero enables loop unrolling in unroll.c. All loops are unrolled.
570 This is generally not a win. */
572 int flag_unroll_all_loops;
574 /* Nonzero forces all invariant computations in loops to be moved
577 int flag_move_all_movables = 0;
579 /* Nonzero forces all general induction variables in loops to be
582 int flag_reduce_all_givs = 0;
584 /* Nonzero to perform full register move optimization passes. This is the
587 int flag_regmove = 0;
589 /* Nonzero for -fwritable-strings:
590 store string constants in data segment and don't uniquize them. */
592 int flag_writable_strings = 0;
594 /* Nonzero means don't put addresses of constant functions in registers.
595 Used for compiling the Unix kernel, where strange substitutions are
596 done on the assembly output. */
598 int flag_no_function_cse = 0;
600 /* Nonzero for -fomit-frame-pointer:
601 don't make a frame pointer in simple functions that don't require one. */
603 int flag_omit_frame_pointer = 0;
605 /* Nonzero means place each function into its own section on those platforms
606 which support arbitrary section names and unlimited numbers of sections. */
608 int flag_function_sections = 0;
610 /* ... and similar for data. */
612 int flag_data_sections = 0;
614 /* Nonzero to inhibit use of define_optimization peephole opts. */
616 int flag_no_peephole = 0;
618 /* Nonzero allows GCC to violate some IEEE or ANSI rules regarding math
619 operations in the interest of optimization. For example it allows
620 GCC to assume arguments to sqrt are nonnegative numbers, allowing
621 faster code for sqrt to be generated. */
623 int flag_fast_math = 0;
625 /* Nonzero allows GCC to optimize sibling and tail recursive calls. */
627 int flag_optimize_sibling_calls = 0;
629 /* Nonzero means the front end generally wants `errno' maintained by math
630 operations, like built-in SQRT, unless overridden by flag_fast_math. */
632 int flag_errno_math = 1;
634 /* 0 means straightforward implementation of complex divide acceptable.
635 1 means wide ranges of inputs must work for complex divide.
636 2 means C99-like requirements for complex divide (not yet implemented). */
638 int flag_complex_divide_method = 0;
640 /* Nonzero means all references through pointers are volatile. */
644 /* Nonzero means treat all global and extern variables as volatile. */
646 int flag_volatile_global;
648 /* Nonzero means treat all static variables as volatile. */
650 int flag_volatile_static;
652 /* Nonzero means just do syntax checking; don't output anything. */
654 int flag_syntax_only = 0;
656 /* Nonzero means perform global cse. */
658 static int flag_gcse;
660 /* Nonzero means to use global dataflow analysis to eliminate
661 useless null pointer tests. */
663 static int flag_delete_null_pointer_checks;
665 /* Nonzero means to rerun cse after loop optimization. This increases
666 compilation time about 20% and picks up a few more common expressions. */
668 static int flag_rerun_cse_after_loop;
670 /* Nonzero means to run loop optimizations twice. */
672 int flag_rerun_loop_opt;
674 /* Nonzero for -finline-functions: ok to inline functions that look like
675 good inline candidates. */
677 int flag_inline_functions;
679 /* Nonzero for -fkeep-inline-functions: even if we make a function
680 go inline everywhere, keep its definition around for debugging
683 int flag_keep_inline_functions;
685 /* Nonzero means that functions will not be inlined. */
689 /* Nonzero means that we should emit static const variables
690 regardless of whether or not optimization is turned on. */
692 int flag_keep_static_consts = 1;
694 /* Nonzero means we should be saving declaration info into a .X file. */
696 int flag_gen_aux_info = 0;
698 /* Specified name of aux-info file. */
700 static char *aux_info_file_name;
702 /* Nonzero means make the text shared if supported. */
704 int flag_shared_data;
706 /* Nonzero means schedule into delayed branch slots if supported. */
708 int flag_delayed_branch;
710 /* Nonzero if we are compiling pure (sharable) code.
711 Value is 1 if we are doing reasonable (i.e. simple
712 offset into offset table) pic. Value is 2 if we can
713 only perform register offsets. */
717 /* Nonzero means generate extra code for exception handling and enable
718 exception handling. */
722 /* Nonzero means use the new model for exception handling. Replaces
723 -DNEW_EH_MODEL as a compile option. */
725 int flag_new_exceptions = 1;
727 /* Nonzero means generate frame unwind info table when supported. */
729 int flag_unwind_tables = 0;
731 /* Nonzero means don't place uninitialized global data in common storage
736 /* Nonzero means pretend it is OK to examine bits of target floats,
737 even if that isn't true. The resulting code will have incorrect constants,
738 but the same series of instructions that the native compiler would make. */
740 int flag_pretend_float;
742 /* Nonzero means change certain warnings into errors.
743 Usually these are warnings about failure to conform to some standard. */
745 int flag_pedantic_errors = 0;
747 /* flag_schedule_insns means schedule insns within basic blocks (before
749 flag_schedule_insns_after_reload means schedule insns after
752 int flag_schedule_insns = 0;
753 int flag_schedule_insns_after_reload = 0;
755 /* The following flags have effect only for scheduling before register
758 flag_schedule_interblock means schedule insns accross basic blocks.
759 flag_schedule_speculative means allow speculative motion of non-load insns.
760 flag_schedule_speculative_load means allow speculative motion of some
762 flag_schedule_speculative_load_dangerous allows speculative motion of more
765 int flag_schedule_interblock = 1;
766 int flag_schedule_speculative = 1;
767 int flag_schedule_speculative_load = 0;
768 int flag_schedule_speculative_load_dangerous = 0;
770 int flag_single_precision_constant;
772 /* flag_branch_on_count_reg means try to replace add-1,compare,branch tupple
773 by a cheaper branch on a count register. */
774 int flag_branch_on_count_reg = 1;
776 /* -finhibit-size-directive inhibits output of .size for ELF.
777 This is used only for compiling crtstuff.c,
778 and it may be extended to other effects
779 needed for crtstuff.c on other systems. */
780 int flag_inhibit_size_directive = 0;
782 /* -fverbose-asm causes extra commentary information to be produced in
783 the generated assembly code (to make it more readable). This option
784 is generally only of use to those who actually need to read the
785 generated assembly code (perhaps while debugging the compiler itself).
786 -fno-verbose-asm, the default, causes the extra information
787 to be omitted and is useful when comparing two assembler files. */
789 int flag_verbose_asm = 0;
791 /* -dA causes debug commentary information to be produced in
792 the generated assembly code (to make it more readable). This option
793 is generally only of use to those who actually need to read the
794 generated assembly code (perhaps while debugging the compiler itself).
795 Currently, this switch is only used by dwarfout.c; however, it is intended
796 to be a catchall for printing debug information in the assembler file. */
798 int flag_debug_asm = 0;
800 /* -dP causes the rtl to be emitted as a comment in assembly. */
802 int flag_dump_rtl_in_asm = 0;
804 /* -fgnu-linker specifies use of the GNU linker for initializations.
805 (Or, more generally, a linker that handles initializations.)
806 -fno-gnu-linker says that collect2 will be used. */
808 int flag_gnu_linker = 0;
810 int flag_gnu_linker = 1;
816 /* Enable dead code elimination. */
819 /* Tag all structures with __attribute__(packed). */
820 int flag_pack_struct = 0;
822 /* Emit code to check for stack overflow; also may cause large objects
823 to be allocated dynamically. */
824 int flag_stack_check;
826 /* When non-NULL, indicates that whenever space is allocated on the
827 stack, the resulting stack pointer must not pass this
828 address---that is, for stacks that grow downward, the stack pointer
829 must always be greater than or equal to this address; for stacks
830 that grow upward, the stack pointer must be less than this address.
831 At present, the rtx may be either a REG or a SYMBOL_REF, although
832 the support provided depends on the backend. */
835 /* -fcheck-memory-usage causes extra code to be generated in order to check
836 memory accesses. This is used by a detector of bad memory accesses such
838 int flag_check_memory_usage = 0;
840 /* -fprefix-function-name causes function name to be prefixed. This
841 can be used with -fcheck-memory-usage to isolate code compiled with
842 -fcheck-memory-usage. */
843 int flag_prefix_function_name = 0;
845 /* 0 if pointer arguments may alias each other. True in C.
846 1 if pointer arguments may not alias each other but may alias
848 2 if pointer arguments may not alias each other and may not
849 alias global variables. True in Fortran.
850 This defaults to 0 for C. */
851 int flag_argument_noalias = 0;
853 /* Nonzero if we should do (language-dependent) alias analysis.
854 Typically, this analysis will assume that expressions of certain
855 types do not alias expressions of certain other types. Only used
856 if alias analysis (in general) is enabled. */
857 int flag_strict_aliasing = 0;
859 /* Instrument functions with calls at entry and exit, for profiling. */
860 int flag_instrument_function_entry_exit = 0;
862 /* Nonzero means ignore `#ident' directives. 0 means handle them.
863 On SVR4 targets, it also controls whether or not to emit a
864 string identifying the compiler. */
866 int flag_no_ident = 0;
868 /* This will perform a peephole pass before sched2. */
869 int flag_peephole2 = 0;
871 /* -fbounded-pointers causes gcc to compile pointers as composite
872 objects occupying three words: the pointer value, the base address
873 of the referent object, and the address immediately beyond the end
874 of the referent object. The base and extent allow us to perform
875 runtime bounds checking. -fbounded-pointers implies -fcheck-bounds. */
876 int flag_bounded_pointers = 0;
878 /* -fcheck-bounds causes gcc to generate array bounds checks.
879 For C, C++: defaults to value of flag_bounded_pointers.
880 For ObjC: defaults to off.
881 For Java: defaults to on.
882 For Fortran: defaults to off.
883 For CHILL: defaults to off. */
884 int flag_bounds_check = 0;
886 /* If one, renumber instruction UIDs to reduce the number of
887 unused UIDs if there are a lot of instructions. If greater than
888 one, unconditionally renumber instruction UIDs. */
889 int flag_renumber_insns = 1;
891 /* Values of the -falign-* flags: how much to align labels in code.
892 0 means `use default', 1 means `don't align'.
893 For each variable, there is an _log variant which is the power
894 of two not less than the variable, for .align output. */
901 int align_labels_log;
903 int align_functions_log;
905 /* Table of supported debugging formats. */
909 /* Since PREFERRED_DEBUGGING_TYPE isn't necessarily a
910 constant expression, we use NO_DEBUG in its place. */
911 enum debug_info_type debug_type;
912 int use_extensions_p;
913 const char *description;
917 { "", NO_DEBUG, DEFAULT_GDB_EXTENSIONS,
918 "Generate default debug format output" },
919 { "gdb", NO_DEBUG, 1, "Generate default extended debug format output" },
920 #ifdef DBX_DEBUGGING_INFO
921 { "stabs", DBX_DEBUG, 0, "Generate STABS format debug output" },
922 { "stabs+", DBX_DEBUG, 1, "Generate extended STABS format debug output" },
924 #ifdef DWARF_DEBUGGING_INFO
925 { "dwarf", DWARF_DEBUG, 0, "Generate DWARF-1 format debug output"},
926 { "dwarf+", DWARF_DEBUG, 1,
927 "Generated extended DWARF-1 format debug output" },
929 #ifdef DWARF2_DEBUGGING_INFO
930 { "dwarf-2", DWARF2_DEBUG, 0, "Enable DWARF-2 debug output" },
932 #ifdef XCOFF_DEBUGGING_INFO
933 { "xcoff", XCOFF_DEBUG, 0, "Generate XCOFF format debug output" },
934 { "xcoff+", XCOFF_DEBUG, 1, "Generate extended XCOFF format debug output" },
936 #ifdef SDB_DEBUGGING_INFO
937 { "coff", SDB_DEBUG, 0, "Generate COFF format debug output" },
947 const char *description;
949 lang_independent_options;
953 /* Add or remove a leading underscore from user symbols. */
954 int flag_leading_underscore = -1;
956 /* The user symbol prefix after having resolved same. */
957 const char *user_label_prefix;
959 /* A default for same. */
960 #ifndef USER_LABEL_PREFIX
961 #define USER_LABEL_PREFIX ""
964 /* Table of language-independent -f options.
965 STRING is the option name. VARIABLE is the address of the variable.
966 ON_VALUE is the value to store in VARIABLE
967 if `-fSTRING' is seen as an option.
968 (If `-fno-STRING' is seen as an option, the opposite value is stored.) */
970 lang_independent_options f_options[] =
972 {"eliminate-dwarf2-dups", &flag_eliminate_dwarf2_dups, 1,
973 "Perform DWARF2 duplicate elimination"},
974 {"float-store", &flag_float_store, 1,
975 "Do not store floats in registers" },
976 {"volatile", &flag_volatile, 1,
977 "Consider all mem refs through pointers as volatile"},
978 {"volatile-global", &flag_volatile_global, 1,
979 "Consider all mem refs to global data to be volatile" },
980 {"volatile-static", &flag_volatile_static, 1,
981 "Consider all mem refs to static data to be volatile" },
982 {"defer-pop", &flag_defer_pop, 1,
983 "Defer popping functions args from stack until later" },
984 {"omit-frame-pointer", &flag_omit_frame_pointer, 1,
985 "When possible do not generate stack frames"},
986 {"optimize-sibling-calls", &flag_optimize_sibling_calls, 1,
987 "Optimize sibling and tail recursive calls" },
988 {"cse-follow-jumps", &flag_cse_follow_jumps, 1,
989 "When running CSE, follow jumps to their targets" },
990 {"cse-skip-blocks", &flag_cse_skip_blocks, 1,
991 "When running CSE, follow conditional jumps" },
992 {"expensive-optimizations", &flag_expensive_optimizations, 1,
993 "Perform a number of minor, expensive optimisations" },
994 {"thread-jumps", &flag_thread_jumps, 1,
995 "Perform jump threading optimisations"},
996 {"strength-reduce", &flag_strength_reduce, 1,
997 "Perform strength reduction optimisations" },
998 {"unroll-loops", &flag_unroll_loops, 1,
999 "Perform loop unrolling when iteration count is known" },
1000 {"unroll-all-loops", &flag_unroll_all_loops, 1,
1001 "Perform loop unrolling for all loops" },
1002 {"move-all-movables", &flag_move_all_movables, 1,
1003 "Force all loop invariant computations out of loops" },
1004 {"reduce-all-givs", &flag_reduce_all_givs, 1,
1005 "Strength reduce all loop general induction variables" },
1006 {"writable-strings", &flag_writable_strings, 1,
1007 "Store strings in writable data section" },
1008 {"peephole", &flag_no_peephole, 0,
1009 "Enable machine specific peephole optimisations" },
1010 {"force-mem", &flag_force_mem, 1,
1011 "Copy memory operands into registers before using" },
1012 {"force-addr", &flag_force_addr, 1,
1013 "Copy memory address constants into regs before using" },
1014 {"function-cse", &flag_no_function_cse, 0,
1015 "Allow function addresses to be held in registers" },
1016 {"inline-functions", &flag_inline_functions, 1,
1017 "Integrate simple functions into their callers" },
1018 {"keep-inline-functions", &flag_keep_inline_functions, 1,
1019 "Generate code for funcs even if they are fully inlined" },
1020 {"inline", &flag_no_inline, 0,
1021 "Pay attention to the 'inline' keyword"},
1022 {"keep-static-consts", &flag_keep_static_consts, 1,
1023 "Emit static const variables even if they are not used" },
1024 {"syntax-only", &flag_syntax_only, 1,
1025 "Check for syntax errors, then stop" },
1026 {"shared-data", &flag_shared_data, 1,
1027 "Mark data as shared rather than private" },
1028 {"caller-saves", &flag_caller_saves, 1,
1029 "Enable saving registers around function calls" },
1030 {"pcc-struct-return", &flag_pcc_struct_return, 1,
1031 "Return 'short' aggregates in memory, not registers" },
1032 {"reg-struct-return", &flag_pcc_struct_return, 0,
1033 "Return 'short' aggregates in registers" },
1034 {"delayed-branch", &flag_delayed_branch, 1,
1035 "Attempt to fill delay slots of branch instructions" },
1036 {"gcse", &flag_gcse, 1,
1037 "Perform the global common subexpression elimination" },
1038 {"rerun-cse-after-loop", &flag_rerun_cse_after_loop, 1,
1039 "Run CSE pass after loop optimisations"},
1040 {"rerun-loop-opt", &flag_rerun_loop_opt, 1,
1041 "Run the loop optimiser twice"},
1042 {"delete-null-pointer-checks", &flag_delete_null_pointer_checks, 1,
1043 "Delete useless null pointer checks" },
1044 {"pretend-float", &flag_pretend_float, 1,
1045 "Pretend that host and target use the same FP format"},
1046 {"schedule-insns", &flag_schedule_insns, 1,
1047 "Reschedule instructions to avoid pipeline stalls"},
1048 {"schedule-insns2", &flag_schedule_insns_after_reload, 1,
1049 "Run two passes of the instruction scheduler"},
1050 {"sched-interblock",&flag_schedule_interblock, 1,
1051 "Enable scheduling across basic blocks" },
1052 {"sched-spec",&flag_schedule_speculative, 1,
1053 "Allow speculative motion of non-loads" },
1054 {"sched-spec-load",&flag_schedule_speculative_load, 1,
1055 "Allow speculative motion of some loads" },
1056 {"sched-spec-load-dangerous",&flag_schedule_speculative_load_dangerous, 1,
1057 "Allow speculative motion of more loads" },
1058 {"branch-count-reg",&flag_branch_on_count_reg, 1,
1059 "Replace add,compare,branch with branch on count reg"},
1060 {"pic", &flag_pic, 1,
1061 "Generate position independent code, if possible"},
1062 {"PIC", &flag_pic, 2, ""},
1063 {"exceptions", &flag_exceptions, 1,
1064 "Enable exception handling" },
1065 {"new-exceptions", &flag_new_exceptions, 1,
1066 "Use the new model for exception handling" },
1067 {"unwind-tables", &flag_unwind_tables, 1,
1068 "Just generate unwind tables for exception handling" },
1069 {"sjlj-exceptions", &exceptions_via_longjmp, 1,
1070 "Use setjmp/longjmp to handle exceptions" },
1071 {"asynchronous-exceptions", &asynchronous_exceptions, 1,
1072 "Support asynchronous exceptions" },
1073 {"profile-arcs", &profile_arc_flag, 1,
1074 "Insert arc based program profiling code" },
1075 {"test-coverage", &flag_test_coverage, 1,
1076 "Create data files needed by gcov" },
1077 {"branch-probabilities", &flag_branch_probabilities, 1,
1078 "Use profiling information for branch probabilities" },
1079 {"reorder-blocks", &flag_reorder_blocks, 1,
1080 "Reorder basic blocks to improve code placement" },
1081 {"rename-registers", &flag_rename_registers, 1,
1082 "Do the register renaming optimization pass"},
1083 {"fast-math", &flag_fast_math, 1,
1084 "Improve FP speed by violating ANSI & IEEE rules" },
1085 {"common", &flag_no_common, 0,
1086 "Do not put unitialised globals in the common section" },
1087 {"inhibit-size-directive", &flag_inhibit_size_directive, 1,
1088 "Do not generate .size directives" },
1089 {"function-sections", &flag_function_sections, 1,
1090 "place each function into its own section" },
1091 {"data-sections", &flag_data_sections, 1,
1092 "place data items into their own section" },
1093 {"verbose-asm", &flag_verbose_asm, 1,
1094 "Add extra commentry to assembler output"},
1095 {"gnu-linker", &flag_gnu_linker, 1,
1096 "Output GNU ld formatted global initialisers"},
1097 {"regmove", &flag_regmove, 1,
1098 "Enables a register move optimisation"},
1099 {"optimize-register-move", &flag_regmove, 1,
1100 "Do the full regmove optimization pass"},
1101 {"pack-struct", &flag_pack_struct, 1,
1102 "Pack structure members together without holes" },
1103 {"stack-check", &flag_stack_check, 1,
1104 "Insert stack checking code into the program" },
1105 {"argument-alias", &flag_argument_noalias, 0,
1106 "Specify that arguments may alias each other & globals"},
1107 {"argument-noalias", &flag_argument_noalias, 1,
1108 "Assume arguments may alias globals but not each other"},
1109 {"argument-noalias-global", &flag_argument_noalias, 2,
1110 "Assume arguments do not alias each other or globals" },
1111 {"strict-aliasing", &flag_strict_aliasing, 1,
1112 "Assume strict aliasing rules apply" },
1113 {"align-loops", &align_loops, 0,
1114 "Align the start of loops" },
1115 {"align-jumps", &align_jumps, 0,
1116 "Align labels which are only reached by jumping" },
1117 {"align-labels", &align_labels, 0,
1118 "Align all labels" },
1119 {"align-functions", &align_functions, 0,
1120 "Align the start of functions" },
1121 {"check-memory-usage", &flag_check_memory_usage, 1,
1122 "Generate code to check every memory access" },
1123 {"prefix-function-name", &flag_prefix_function_name, 1,
1124 "Add a prefix to all function names" },
1125 {"dump-unnumbered", &flag_dump_unnumbered, 1,
1126 "Suppress output of instruction numbers and line number notes in debugging dumps"},
1127 {"instrument-functions", &flag_instrument_function_entry_exit, 1,
1128 "Instrument function entry/exit with profiling calls"},
1129 {"ssa", &flag_ssa, 1,
1130 "Enable SSA optimizations" },
1131 {"dce", &flag_dce, 1,
1132 "Enable dead code elimination" },
1133 {"leading-underscore", &flag_leading_underscore, 1,
1134 "External symbols have a leading underscore" },
1135 {"ident", &flag_no_ident, 0,
1136 "Process #ident directives"},
1137 { "peephole2", &flag_peephole2, 1,
1138 "Enables an rtl peephole pass run before sched2" },
1139 {"math-errno", &flag_errno_math, 1,
1140 "Set errno after built-in math functions"},
1141 {"bounded-pointers", &flag_bounded_pointers, 1,
1142 "Compile pointers as triples: value, base & end" },
1143 {"bounds-check", &flag_bounds_check, 1,
1144 "Generate code to check bounds before dereferencing pointers and arrays" },
1145 {"single-precision-constant", &flag_single_precision_constant, 1,
1146 "Convert floating point constant to single precision constant"},
1147 {"time-report", &time_report, 1,
1148 "Report time taken by each compiler pass at end of run"},
1149 {"mem-report", &mem_report, 1,
1150 "Report on permanent memory allocation at end of run"},
1151 { "trapv", &flag_trapv, 1,
1152 "Trap for signed overflow in addition / subtraction / multiplication." },
1155 /* Table of language-specific options. */
1157 static struct lang_opt
1160 const char *description;
1162 documented_lang_options[] =
1164 /* In order not to overload the --help output, the convention
1165 used here is to only describe those options which are not
1166 enabled by default. */
1168 { "-ansi", "Compile just for ISO C89" },
1169 { "-fallow-single-precision",
1170 "Do not promote floats to double if using -traditional" },
1171 { "-std= ", "Determine language standard"},
1173 { "-fsigned-bitfields", "" },
1174 { "-funsigned-bitfields","Make bitfields by unsigned by default" },
1175 { "-fno-signed-bitfields", "" },
1176 { "-fno-unsigned-bitfields","" },
1177 { "-fsigned-char", "Make 'char' be signed by default"},
1178 { "-funsigned-char", "Make 'char' be unsigned by default"},
1179 { "-fno-signed-char", "" },
1180 { "-fno-unsigned-char", "" },
1182 { "-ftraditional", "" },
1183 { "-traditional", "Attempt to support traditional K&R style C"},
1184 { "-fnotraditional", "" },
1185 { "-fno-traditional", "" },
1188 { "-fno-asm", "Do not recognise the 'asm' keyword" },
1189 { "-fbuiltin", "" },
1190 { "-fno-builtin", "Do not recognise any built in functions" },
1191 { "-fhosted", "Assume normal C execution environment" },
1192 { "-fno-hosted", "" },
1194 "Assume that standard libraries & main might not exist" },
1195 { "-fno-freestanding", "" },
1196 { "-fcond-mismatch", "Allow different types as args of ? operator"},
1197 { "-fno-cond-mismatch", "" },
1198 { "-fdollars-in-identifiers", "Allow the use of $ inside identifiers" },
1199 { "-fno-dollars-in-identifiers", "" },
1200 { "-fpreprocessed", "" },
1201 { "-fno-preprocessed", "" },
1202 { "-fshort-double", "Use the same size for double as for float" },
1203 { "-fno-short-double", "" },
1204 { "-fshort-enums", "Use the smallest fitting integer to hold enums"},
1205 { "-fno-short-enums", "" },
1206 { "-fshort-wchar", "Override the underlying type for wchar_t to `unsigned short'" },
1207 { "-fno-short-wchar", "" },
1209 { "-Wall", "Enable most warning messages" },
1210 { "-Wbad-function-cast",
1211 "Warn about casting functions to incompatible types" },
1212 { "-Wno-bad-function-cast", "" },
1213 { "-Wmissing-noreturn",
1214 "Warn about functions which might be candidates for attribute noreturn" },
1215 { "-Wno-missing-noreturn", "" },
1216 { "-Wmissing-format-attribute",
1217 "Warn about functions which might be candidates for format attributes" },
1218 { "-Wno-missing-format-attribute", "" },
1219 { "-Wcast-qual", "Warn about casts which discard qualifiers"},
1220 { "-Wno-cast-qual", "" },
1221 { "-Wchar-subscripts", "Warn about subscripts whose type is 'char'"},
1222 { "-Wno-char-subscripts", "" },
1223 { "-Wcomment", "Warn if nested comments are detected" },
1224 { "-Wno-comment", "" },
1225 { "-Wcomments", "Warn if nested comments are detected" },
1226 { "-Wno-comments", "" },
1227 { "-Wconversion", "Warn about possibly confusing type conversions" },
1228 { "-Wno-conversion", "" },
1229 { "-Wformat", "Warn about printf/scanf/strftime format anomalies" },
1230 { "-Wno-format", "" },
1231 { "-Wformat-y2k", "" },
1232 { "-Wno-format-y2k",
1233 "Don't warn about strftime formats yielding 2 digit years" },
1234 { "-Wformat-extra-args", "" },
1235 { "-Wno-format-extra-args",
1236 "Don't warn about too many arguments to format functions" },
1237 { "-Wformat-nonliteral", "Warn about non-string-literal format strings" },
1238 { "-Wno-format-nonliteral", "" },
1239 { "-Wformat-security",
1240 "Warn about possible security problems with format functions" },
1241 { "-Wno-format-security", "" },
1242 { "-Wimplicit-function-declaration",
1243 "Warn about implicit function declarations" },
1244 { "-Wno-implicit-function-declaration", "" },
1245 { "-Werror-implicit-function-declaration", "" },
1246 { "-Wimplicit-int", "Warn when a declaration does not specify a type" },
1247 { "-Wno-implicit-int", "" },
1248 { "-Wimplicit", "" },
1249 { "-Wno-implicit", "" },
1250 { "-Wimport", "Warn about the use of the #import directive" },
1251 { "-Wno-import", "" },
1252 { "-Wlong-long","" },
1253 { "-Wno-long-long", "Do not warn about using 'long long' when -pedantic" },
1254 { "-Wmain", "Warn about suspicious declarations of main" },
1255 { "-Wno-main", "" },
1256 { "-Wmissing-braces",
1257 "Warn about possibly missing braces around initialisers" },
1258 { "-Wno-missing-braces", "" },
1259 { "-Wmissing-declarations",
1260 "Warn about global funcs without previous declarations"},
1261 { "-Wno-missing-declarations", "" },
1262 { "-Wmissing-prototypes", "Warn about global funcs without prototypes" },
1263 { "-Wno-missing-prototypes", "" },
1264 { "-Wmultichar", "Warn about use of multicharacter literals"},
1265 { "-Wno-multichar", "" },
1266 { "-Wnested-externs", "Warn about externs not at file scope level" },
1267 { "-Wno-nested-externs", "" },
1268 { "-Wparentheses", "Warn about possible missing parentheses" },
1269 { "-Wno-parentheses", "" },
1270 { "-Wsequence-point",
1271 "Warn about possible violations of sequence point rules" },
1272 { "-Wno-sequence-point", "" },
1273 { "-Wpointer-arith", "Warn about function pointer arithmetic" },
1274 { "-Wno-pointer-arith", "" },
1275 { "-Wredundant-decls",
1276 "Warn about multiple declarations of the same object" },
1277 { "-Wno-redundant-decls", "" },
1278 { "-Wsign-compare", "Warn about signed/unsigned comparisons" },
1279 { "-Wno-sign-compare", "" },
1280 { "-Wfloat-equal", "Warn about testing equality of floating point numbers" },
1281 { "-Wno-float-equal", "" },
1282 { "-Wunknown-pragmas", "Warn about unrecognized pragmas" },
1283 { "-Wno-unknown-pragmas", "" },
1284 { "-Wstrict-prototypes", "Warn about non-prototyped function decls" },
1285 { "-Wno-strict-prototypes", "" },
1286 { "-Wtraditional", "Warn about constructs whose meaning change in ISO C"},
1287 { "-Wno-traditional", "" },
1288 { "-Wtrigraphs", "Warn when trigraphs are encountered" },
1289 { "-Wno-trigraphs", "" },
1291 { "-Wno-undef", "" },
1292 { "-Wwrite-strings", "Mark strings as 'const char *'"},
1293 { "-Wno-write-strings", "" },
1295 #define DEFINE_LANG_NAME(NAME) { NULL, NAME },
1297 #include "options.h"
1301 /* Here is a table, controlled by the tm.h file, listing each -m switch
1302 and which bits in `target_switches' it should set or clear.
1303 If VALUE is positive, it is bits to set.
1304 If VALUE is negative, -VALUE is bits to clear.
1305 (The sign bit is not used so there is no confusion.) */
1311 const char *description;
1313 target_switches [] = TARGET_SWITCHES;
1315 /* This table is similar, but allows the switch to have a value. */
1317 #ifdef TARGET_OPTIONS
1321 const char **variable;
1322 const char *description;
1324 target_options [] = TARGET_OPTIONS;
1327 /* Options controlling warnings. */
1329 /* Don't print warning messages. -w. */
1331 int inhibit_warnings = 0;
1333 /* Don't suppress warnings from system headers. -Wsystem-headers. */
1335 int warn_system_headers = 0;
1337 /* Print various extra warnings. -W. */
1339 int extra_warnings = 0;
1341 /* Treat warnings as errors. -Werror. */
1343 int warnings_are_errors = 0;
1345 /* Nonzero to warn about unused variables, functions et.al. */
1347 int warn_unused_function;
1348 int warn_unused_label;
1349 int warn_unused_parameter;
1350 int warn_unused_variable;
1351 int warn_unused_value;
1354 set_Wunused (setting)
1357 warn_unused_function = setting;
1358 warn_unused_label = setting;
1359 /* Unused function parameter warnings are reported when either ``-W
1360 -Wunused'' or ``-Wunused-parameter'' is specified. Differentiate
1361 -Wunused by setting WARN_UNUSED_PARAMETER to -1. */
1363 warn_unused_parameter = 0;
1364 else if (!warn_unused_parameter)
1365 warn_unused_parameter = -1;
1366 warn_unused_variable = setting;
1367 warn_unused_value = setting;
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 fails to have a case for every enum value. */
1386 /* Nonzero means warn about function definitions that default the return type
1387 or that use a null return and have a return-type other than void. */
1389 int warn_return_type;
1391 /* Nonzero means warn about pointer casts that increase the required
1392 alignment of the target type (and might therefore lead to a crash
1393 due to a misaligned access). */
1395 int warn_cast_align;
1397 /* Nonzero means warn about any identifiers that match in the first N
1398 characters. The value N is in `id_clash_len'. */
1403 /* Nonzero means warn about any objects definitions whose size is larger
1404 than N bytes. Also want about function definitions whose returned
1405 values are larger than N bytes. The value N is in `larger_than_size'. */
1407 int warn_larger_than;
1408 HOST_WIDE_INT larger_than_size;
1410 /* Nonzero means warn if inline function is too large. */
1414 /* Warn if a function returns an aggregate,
1415 since there are often incompatible calling conventions for doing this. */
1417 int warn_aggregate_return;
1419 /* Warn if packed attribute on struct is unnecessary and inefficient. */
1423 /* Warn when gcc pads a structure to an alignment boundary. */
1427 /* Warn when an optimization pass is disabled. */
1429 int warn_disabled_optimization;
1431 /* Warn about functions which might be candidates for attribute noreturn. */
1433 int warn_missing_noreturn;
1435 /* Likewise for -W. */
1437 lang_independent_options W_options[] =
1439 {"unused-function", &warn_unused_function, 1, "Warn when a function is unused" },
1440 {"unused-label", &warn_unused_label, 1, "Warn when a label is unused" },
1441 {"unused-parameter", &warn_unused_parameter, 1, "Warn when a function parameter is unused" },
1442 {"unused-variable", &warn_unused_variable, 1, "Warn when a variable is unused" },
1443 {"unused-value", &warn_unused_value, 1, "Warn when an expression value is unused" },
1444 {"system-headers", &warn_system_headers, 1, "Do not suppress warnings from system headers"},
1445 {"error", &warnings_are_errors, 1, ""},
1446 {"shadow", &warn_shadow, 1, "Warn when one local variable shadows another" },
1447 {"switch", &warn_switch, 1,
1448 "Warn about enumerated switches missing a specific case" },
1449 {"aggregate-return", &warn_aggregate_return, 1,
1450 "Warn about returning structures, unions or arrays" },
1451 {"cast-align", &warn_cast_align, 1,
1452 "Warn about pointer casts which increase alignment" },
1453 {"unreachable-code", &warn_notreached, 1,
1454 "Warn about code that will never be executed" },
1455 {"uninitialized", &warn_uninitialized, 1,
1456 "Warn about unitialized automatic variables"},
1457 {"inline", &warn_inline, 1,
1458 "Warn when an inlined function cannot be inlined"},
1459 {"packed", &warn_packed, 1,
1460 "Warn when the packed attribute has no effect on struct layout"},
1461 {"padded", &warn_padded, 1,
1462 "Warn when padding is required to align struct members"},
1463 {"disabled-optimization", &warn_disabled_optimization, 1,
1464 "Warn when an optimization pass is disabled"}
1467 /* Output files for assembler code (real compiler output)
1468 and debugging dumps. */
1471 FILE *aux_info_file;
1472 FILE *rtl_dump_file = NULL;
1474 /* Decode the string P as an integral parameter.
1475 If the string is indeed an integer return its numeric value else
1476 issue an Invalid Option error for the option PNAME and return DEFVAL.
1477 If PNAME is zero just return DEFVAL, do not call error. */
1480 read_integral_parameter (p, pname, defval)
1485 const char *endp = p;
1489 if (*endp >= '0' && *endp <= '9')
1498 error ("Invalid option `%s'", pname);
1506 /* This is the default decl_printable_name function. */
1509 decl_name (decl, verbosity)
1511 int verbosity ATTRIBUTE_UNUSED;
1513 return IDENTIFIER_POINTER (DECL_NAME (decl));
1517 /* This calls abort and is used to avoid problems when abort if a macro.
1518 It is used when we need to pass the address of abort. */
1526 /* When `malloc.c' is compiled with `rcheck' defined,
1527 it calls this function to report clobberage. */
1531 const char *s ATTRIBUTE_UNUSED;
1536 /* Return the logarithm of X, base 2, considering X unsigned,
1537 if X is a power of 2. Otherwise, returns -1.
1539 This should be used via the `exact_log2' macro. */
1543 register unsigned HOST_WIDE_INT x;
1545 register int log = 0;
1546 /* Test for 0 or a power of 2. */
1547 if (x == 0 || x != (x & -x))
1549 while ((x >>= 1) != 0)
1554 /* Given X, an unsigned number, return the largest int Y such that 2**Y <= X.
1555 If X is 0, return -1.
1557 This should be used via the floor_log2 macro. */
1561 register unsigned HOST_WIDE_INT x;
1563 register int log = -1;
1570 /* Return the approximate positive square root of a number N. This is for
1571 statistical reports, not code generation. */
1586 d = (s * s - x) / (2 * s);
1593 static int float_handler_set;
1595 jmp_buf float_handler;
1597 /* Signals actually come here. */
1600 float_signal (signo)
1601 /* If this is missing, some compilers complain. */
1602 int signo ATTRIBUTE_UNUSED;
1604 if (float_handled == 0)
1605 crash_signal (signo);
1606 #if defined (USG) || defined (hpux)
1607 /* Re-enable the signal catcher. */
1608 signal (SIGFPE, float_signal);
1611 signal (SIGFPE, float_signal);
1612 longjmp (float_handler, 1);
1615 /* Specify where to longjmp to when a floating arithmetic error happens.
1616 If HANDLER is 0, it means don't handle the errors any more. */
1619 set_float_handler (handler)
1622 float_handled = (handler != 0);
1624 bcopy ((char *) handler, (char *) float_handler, sizeof (float_handler));
1626 if (float_handled && ! float_handler_set)
1628 signal (SIGFPE, float_signal);
1629 float_handler_set = 1;
1633 /* This is a wrapper function for code which might elicit an
1634 arithmetic exception. That code should be passed in as a function
1635 pointer FN, and one argument DATA. DATA is usually a struct which
1636 contains the real input and output for function FN. This function
1637 returns 0 (failure) if longjmp was called (i.e. an exception
1638 occured.) It returns 1 (success) otherwise. */
1641 do_float_handler (fn, data)
1642 void (*fn) PARAMS ((PTR));
1649 /* We got here via longjmp () caused by an exception in function
1651 set_float_handler (NULL);
1655 set_float_handler (buf);
1657 set_float_handler (NULL);
1661 /* Specify, in HANDLER, where to longjmp to when a floating arithmetic
1662 error happens, pushing the previous specification into OLD_HANDLER.
1663 Return an indication of whether there was a previous handler in effect. */
1666 push_float_handler (handler, old_handler)
1667 jmp_buf handler, old_handler;
1669 int was_handled = float_handled;
1673 memcpy ((char *) old_handler, (char *) float_handler,
1674 sizeof (float_handler));
1676 memcpy ((char *) float_handler, (char *) handler, sizeof (float_handler));
1680 /* Restore the previous specification of whether and where to longjmp to
1681 when a floating arithmetic error happens. */
1684 pop_float_handler (handled, handler)
1688 float_handled = handled;
1690 bcopy ((char *) handler, (char *) float_handler, sizeof (float_handler));
1693 /* Handler for fatal signals, such as SIGSEGV. These are transformed
1694 into ICE messages, which is much more user friendly. */
1697 crash_signal (signo)
1698 /* If this is missing, some compilers complain. */
1701 error ("Internal error: %s.", strsignal (signo));
1705 /* Strip off a legitimate source ending from the input string NAME of
1706 length LEN. Rather than having to know the names used by all of
1707 our front ends, we strip off an ending of a period followed by
1708 up to five characters. (Java uses ".class".) */
1711 strip_off_ending (name, len)
1716 for (i = 2; i < 6 && len > i; i++)
1718 if (name[len - i] == '.')
1720 name[len - i] = '\0';
1726 /* Given a file name X, return the nondirectory portion. */
1729 file_name_nondirectory (x)
1732 char *tmp = (char *) strrchr (x, '/');
1733 if (DIR_SEPARATOR != '/' && ! tmp)
1734 tmp = (char *) strrchr (x, DIR_SEPARATOR);
1736 return (char *) (tmp + 1);
1741 /* Output a quoted string. */
1744 output_quoted_string (asm_file, string)
1748 #ifdef OUTPUT_QUOTED_STRING
1749 OUTPUT_QUOTED_STRING (asm_file, string);
1753 putc ('\"', asm_file);
1754 while ((c = *string++) != 0)
1756 if (c == '\"' || c == '\\')
1757 putc ('\\', asm_file);
1760 putc ('\"', asm_file);
1764 /* Output a file name in the form wanted by System V. */
1767 output_file_directive (asm_file, input_name)
1769 const char *input_name;
1771 int len = strlen (input_name);
1772 const char *na = input_name + len;
1774 /* NA gets INPUT_NAME sans directory names. */
1775 while (na > input_name)
1777 if (IS_DIR_SEPARATOR (na[-1]))
1782 #ifdef ASM_OUTPUT_MAIN_SOURCE_FILENAME
1783 ASM_OUTPUT_MAIN_SOURCE_FILENAME (asm_file, na);
1785 #ifdef ASM_OUTPUT_SOURCE_FILENAME
1786 ASM_OUTPUT_SOURCE_FILENAME (asm_file, na);
1788 fprintf (asm_file, "\t.file\t");
1789 output_quoted_string (asm_file, na);
1790 fputc ('\n', asm_file);
1795 #ifdef ASM_IDENTIFY_LANGUAGE
1796 /* Routine to build language identifier for object file. */
1799 output_lang_identify (asm_out_file)
1802 int len = strlen (lang_identify ()) + sizeof ("__gnu_compiled_") + 1;
1803 char *s = (char *) alloca (len);
1805 sprintf (s, "__gnu_compiled_%s", lang_identify ());
1806 ASM_OUTPUT_LABEL (asm_out_file, s);
1810 /* Routine to open a dump file. Return true if the dump file is enabled. */
1813 open_dump_file (index, decl)
1814 enum dump_file_index index;
1818 const char *open_arg;
1821 if (! dump_file[index].enabled)
1824 timevar_push (TV_DUMP);
1825 if (rtl_dump_file != NULL)
1826 fclose (rtl_dump_file);
1828 sprintf (seq, ".%02d.", index);
1830 if (! dump_file[index].initialized)
1832 /* If we've not initialized the files, do so now. */
1833 if (graph_dump_format != no_graph
1834 && dump_file[index].graph_dump_p)
1836 dump_name = concat (seq, dump_file[index].extension, NULL);
1837 clean_graph_dump_file (dump_base_name, dump_name);
1840 dump_file[index].initialized = 1;
1846 dump_name = concat (dump_base_name, seq,
1847 dump_file[index].extension, NULL);
1849 rtl_dump_file = fopen (dump_name, open_arg);
1850 if (rtl_dump_file == NULL)
1851 pfatal_with_name (dump_name);
1856 fprintf (rtl_dump_file, "\n;; Function %s\n\n",
1857 decl_printable_name (decl, 2));
1859 timevar_pop (TV_DUMP);
1863 /* Routine to close a dump file. */
1866 close_dump_file (index, func, insns)
1867 enum dump_file_index index;
1868 void (*func) PARAMS ((FILE *, rtx));
1871 if (! rtl_dump_file)
1874 timevar_push (TV_DUMP);
1876 && graph_dump_format != no_graph
1877 && dump_file[index].graph_dump_p)
1882 sprintf (seq, ".%02d.", index);
1883 suffix = concat (seq, dump_file[index].extension, NULL);
1884 print_rtl_graph_with_bb (dump_base_name, suffix, insns);
1889 func (rtl_dump_file, insns);
1891 fflush (rtl_dump_file);
1892 fclose (rtl_dump_file);
1894 rtl_dump_file = NULL;
1895 timevar_pop (TV_DUMP);
1898 /* Do any final processing required for the declarations in VEC, of
1899 which there are LEN. We write out inline functions and variables
1900 that have been deferred until this point, but which are required.
1901 Returns non-zero if anything was put out. */
1904 wrapup_global_declarations (vec, len)
1911 int output_something = 0;
1913 for (i = 0; i < len; i++)
1917 /* We're not deferring this any longer. */
1918 DECL_DEFER_OUTPUT (decl) = 0;
1920 if (TREE_CODE (decl) == VAR_DECL && DECL_SIZE (decl) == 0
1921 && incomplete_decl_finalize_hook != 0)
1922 (*incomplete_decl_finalize_hook) (decl);
1925 /* Now emit any global variables or functions that we have been
1926 putting off. We need to loop in case one of the things emitted
1927 here references another one which comes earlier in the list. */
1931 for (i = 0; i < len; i++)
1935 if (TREE_ASM_WRITTEN (decl) || DECL_EXTERNAL (decl))
1938 /* Don't write out static consts, unless we still need them.
1940 We also keep static consts if not optimizing (for debugging),
1941 unless the user specified -fno-keep-static-consts.
1942 ??? They might be better written into the debug information.
1943 This is possible when using DWARF.
1945 A language processor that wants static constants to be always
1946 written out (even if it is not used) is responsible for
1947 calling rest_of_decl_compilation itself. E.g. the C front-end
1948 calls rest_of_decl_compilation from finish_decl.
1949 One motivation for this is that is conventional in some
1950 environments to write things like:
1951 static const char rcsid[] = "... version string ...";
1952 intending to force the string to be in the executable.
1954 A language processor that would prefer to have unneeded
1955 static constants "optimized away" would just defer writing
1956 them out until here. E.g. C++ does this, because static
1957 constants are often defined in header files.
1959 ??? A tempting alternative (for both C and C++) would be
1960 to force a constant to be written if and only if it is
1961 defined in a main file, as opposed to an include file. */
1963 if (TREE_CODE (decl) == VAR_DECL && TREE_STATIC (decl)
1964 && (! TREE_READONLY (decl)
1965 || TREE_PUBLIC (decl)
1967 && flag_keep_static_consts
1968 && !DECL_ARTIFICIAL (decl))
1969 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl))))
1972 rest_of_decl_compilation (decl, NULL_PTR, 1, 1);
1975 if (TREE_CODE (decl) == FUNCTION_DECL
1976 && DECL_INITIAL (decl) != 0
1977 && DECL_SAVED_INSNS (decl) != 0
1978 && (flag_keep_inline_functions
1979 || (TREE_PUBLIC (decl) && !DECL_COMDAT (decl))
1980 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl))))
1983 output_inline_function (decl);
1988 output_something = 1;
1992 return output_something;
1995 /* Issue appropriate warnings for the global declarations in VEC (of
1996 which there are LEN). Output debugging information for them. */
1999 check_global_declarations (vec, len)
2006 for (i = 0; i < len; i++)
2010 if (TREE_CODE (decl) == VAR_DECL && TREE_STATIC (decl)
2011 && ! TREE_ASM_WRITTEN (decl))
2012 /* Cancel the RTL for this decl so that, if debugging info
2013 output for global variables is still to come,
2014 this one will be omitted. */
2015 DECL_RTL (decl) = NULL;
2017 /* Warn about any function
2018 declared static but not defined.
2019 We don't warn about variables,
2020 because many programs have static variables
2021 that exist only to get some text into the object file. */
2022 if (TREE_CODE (decl) == FUNCTION_DECL
2023 && (warn_unused_function
2024 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl)))
2025 && DECL_INITIAL (decl) == 0
2026 && DECL_EXTERNAL (decl)
2027 && ! DECL_ARTIFICIAL (decl)
2028 && ! TREE_PUBLIC (decl))
2030 if (TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl)))
2031 pedwarn_with_decl (decl,
2032 "`%s' used but never defined");
2034 warning_with_decl (decl,
2035 "`%s' declared `static' but never defined");
2036 /* This symbol is effectively an "extern" declaration now. */
2037 TREE_PUBLIC (decl) = 1;
2038 assemble_external (decl);
2041 /* Warn about static fns or vars defined but not used,
2042 but not about inline functions or static consts
2043 since defining those in header files is normal practice. */
2044 if (((warn_unused_function
2045 && TREE_CODE (decl) == FUNCTION_DECL && ! DECL_INLINE (decl))
2046 || (warn_unused_variable
2047 && TREE_CODE (decl) == VAR_DECL && ! TREE_READONLY (decl)))
2048 && ! DECL_IN_SYSTEM_HEADER (decl)
2049 && ! DECL_EXTERNAL (decl)
2050 && ! TREE_PUBLIC (decl)
2051 && ! TREE_USED (decl)
2052 && (TREE_CODE (decl) == FUNCTION_DECL || ! DECL_REGISTER (decl))
2053 /* The TREE_USED bit for file-scope decls
2054 is kept in the identifier, to handle multiple
2055 external decls in different scopes. */
2056 && ! TREE_USED (DECL_NAME (decl)))
2057 warning_with_decl (decl, "`%s' defined but not used");
2059 timevar_push (TV_SYMOUT);
2060 #ifdef SDB_DEBUGGING_INFO
2061 /* The COFF linker can move initialized global vars to the end.
2062 And that can screw up the symbol ordering.
2063 By putting the symbols in that order to begin with,
2064 we avoid a problem. mcsun!unido!fauern!tumuc!pes@uunet.uu.net. */
2065 if (write_symbols == SDB_DEBUG && TREE_CODE (decl) == VAR_DECL
2066 && TREE_PUBLIC (decl) && DECL_INITIAL (decl)
2067 && ! DECL_EXTERNAL (decl)
2068 && DECL_RTL (decl) != 0)
2069 sdbout_symbol (decl, 0);
2071 /* Output COFF information for non-global
2072 file-scope initialized variables. */
2073 if (write_symbols == SDB_DEBUG
2074 && TREE_CODE (decl) == VAR_DECL
2075 && DECL_INITIAL (decl)
2076 && ! DECL_EXTERNAL (decl)
2077 && DECL_RTL (decl) != 0
2078 && GET_CODE (DECL_RTL (decl)) == MEM)
2079 sdbout_toplevel_data (decl);
2080 #endif /* SDB_DEBUGGING_INFO */
2081 #ifdef DWARF_DEBUGGING_INFO
2082 /* Output DWARF information for file-scope tentative data object
2083 declarations, file-scope (extern) function declarations (which
2084 had no corresponding body) and file-scope tagged type declarations
2085 and definitions which have not yet been forced out. */
2087 if (write_symbols == DWARF_DEBUG
2088 && (TREE_CODE (decl) != FUNCTION_DECL || !DECL_INITIAL (decl)))
2089 dwarfout_file_scope_decl (decl, 1);
2091 #ifdef DWARF2_DEBUGGING_INFO
2092 /* Output DWARF2 information for file-scope tentative data object
2093 declarations, file-scope (extern) function declarations (which
2094 had no corresponding body) and file-scope tagged type declarations
2095 and definitions which have not yet been forced out. */
2097 if (write_symbols == DWARF2_DEBUG
2098 && (TREE_CODE (decl) != FUNCTION_DECL || !DECL_INITIAL (decl)))
2099 dwarf2out_decl (decl);
2101 timevar_pop (TV_SYMOUT);
2105 /* Save the current INPUT_FILENAME and LINENO on the top entry in the
2106 INPUT_FILE_STACK. Push a new entry for FILE and LINE, and set the
2107 INPUT_FILENAME and LINENO accordingly. */
2110 push_srcloc (file, line)
2114 struct file_stack *fs;
2116 if (input_file_stack)
2118 input_file_stack->name = input_filename;
2119 input_file_stack->line = lineno;
2122 fs = (struct file_stack *) xmalloc (sizeof (struct file_stack));
2123 fs->name = input_filename = file;
2124 fs->line = lineno = line;
2125 fs->indent_level = 0;
2126 fs->next = input_file_stack;
2127 input_file_stack = fs;
2128 input_file_stack_tick++;
2131 /* Pop the top entry off the stack of presently open source files.
2132 Restore the INPUT_FILENAME and LINENO from the new topmost entry on
2138 struct file_stack *fs;
2140 fs = input_file_stack;
2141 input_file_stack = fs->next;
2143 input_file_stack_tick++;
2144 /* The initial source file is never popped. */
2145 if (!input_file_stack)
2147 input_filename = input_file_stack->name;
2148 lineno = input_file_stack->line;
2151 /* Compile an entire file of output from cpp, named NAME.
2152 Write a file of assembly output and various debugging dumps. */
2160 int name_specified = name != 0;
2162 if (dump_base_name == 0)
2163 dump_base_name = name ? name : "gccdump";
2168 /* Start timing total execution time. */
2171 timevar_start (TV_TOTAL);
2173 /* Initialize data in various passes. */
2176 name = init_parse (name);
2177 init_emit_once (debug_info_level == DINFO_LEVEL_NORMAL
2178 || debug_info_level == DINFO_LEVEL_VERBOSE
2179 || flag_test_coverage
2180 || warn_notreached);
2183 init_decl_processing ();
2189 init_function_once ();
2190 init_stor_layout_once ();
2191 init_varasm_once ();
2193 /* The following initialization functions need to generate rtl, so
2194 provide a dummy function context for them. */
2195 init_dummy_function_start ();
2198 if (flag_caller_saves)
2199 init_caller_save ();
2200 expand_dummy_function_end ();
2202 /* If auxiliary info generation is desired, open the output file.
2203 This goes in the same directory as the source file--unlike
2204 all the other output files. */
2205 if (flag_gen_aux_info)
2207 aux_info_file = fopen (aux_info_file_name, "w");
2208 if (aux_info_file == 0)
2209 pfatal_with_name (aux_info_file_name);
2212 /* Open assembler code output file. Do this even if -fsyntax-only is on,
2213 because then the driver will have provided the name of a temporary
2214 file or bit bucket for us. */
2216 if (! name_specified && asm_file_name == 0)
2217 asm_out_file = stdout;
2220 if (asm_file_name == 0)
2222 int len = strlen (dump_base_name);
2223 char *dumpname = (char *) xmalloc (len + 6);
2224 memcpy (dumpname, dump_base_name, len + 1);
2225 strip_off_ending (dumpname, len);
2226 strcat (dumpname, ".s");
2227 asm_file_name = dumpname;
2229 if (!strcmp (asm_file_name, "-"))
2230 asm_out_file = stdout;
2232 asm_out_file = fopen (asm_file_name, "w");
2233 if (asm_out_file == 0)
2234 pfatal_with_name (asm_file_name);
2237 #ifdef IO_BUFFER_SIZE
2238 setvbuf (asm_out_file, (char *) xmalloc (IO_BUFFER_SIZE),
2239 _IOFBF, IO_BUFFER_SIZE);
2243 name = ggc_strdup (name);
2245 input_filename = name;
2247 /* Put an entry on the input file stack for the main input file. */
2248 push_srcloc (input_filename, 0);
2250 /* Perform language-specific initialization.
2251 This may set main_input_filename. */
2254 /* If the input doesn't start with a #line, use the input name
2255 as the official input file name. */
2256 if (main_input_filename == 0)
2257 main_input_filename = name;
2259 if (flag_syntax_only)
2261 write_symbols = NO_DEBUG;
2263 profile_block_flag = 0;
2267 ASM_FILE_START (asm_out_file);
2269 #ifdef ASM_COMMENT_START
2270 if (flag_verbose_asm)
2272 /* Print the list of options in effect. */
2273 print_version (asm_out_file, ASM_COMMENT_START);
2274 print_switch_values (asm_out_file, 0, MAX_LINE,
2275 ASM_COMMENT_START, " ", "\n");
2276 /* Add a blank line here so it appears in assembler output but not
2278 fprintf (asm_out_file, "\n");
2282 /* Output something to inform GDB that this compilation was by GCC. */
2283 #ifndef ASM_IDENTIFY_GCC
2284 fprintf (asm_out_file, "gcc2_compiled.:\n");
2286 ASM_IDENTIFY_GCC (asm_out_file);
2289 /* Output something to identify which front-end produced this file. */
2290 #ifdef ASM_IDENTIFY_LANGUAGE
2291 ASM_IDENTIFY_LANGUAGE (asm_out_file);
2293 } /* ! flag_syntax_only */
2295 #ifndef ASM_OUTPUT_SECTION_NAME
2296 if (flag_function_sections)
2298 warning ("-ffunction-sections not supported for this target.");
2299 flag_function_sections = 0;
2301 if (flag_data_sections)
2303 warning ("-fdata-sections not supported for this target.");
2304 flag_data_sections = 0;
2308 if (flag_function_sections
2309 && (profile_flag || profile_block_flag))
2311 warning ("-ffunction-sections disabled; it makes profiling impossible.");
2312 flag_function_sections = 0;
2315 #ifndef OBJECT_FORMAT_ELF
2316 if (flag_function_sections && write_symbols != NO_DEBUG)
2317 warning ("-ffunction-sections may affect debugging on some targets.");
2320 /* ??? Note: There used to be a conditional here
2321 to call assemble_zeros without fail if DBX_DEBUGGING_INFO is defined.
2322 This was to guarantee separation between gcc_compiled. and
2323 the first function, for the sake of dbx on Suns.
2324 However, having the extra zero here confused the Emacs
2325 code for unexec, and might confuse other programs too.
2326 Therefore, I took out that change.
2327 In future versions we should find another way to solve
2328 that dbx problem. -- rms, 23 May 93. */
2330 /* Don't let the first function fall at the same address
2331 as gcc_compiled., if profiling. */
2332 if (profile_flag || profile_block_flag)
2334 /* It's best if we can write a nop here since some
2335 assemblers don't tolerate zeros in the text section. */
2336 output_asm_insn (get_insn_template (CODE_FOR_nop, NULL), NULL_PTR);
2339 /* If dbx symbol table desired, initialize writing it
2340 and output the predefined types. */
2341 timevar_push (TV_SYMOUT);
2342 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
2343 if (write_symbols == DBX_DEBUG || write_symbols == XCOFF_DEBUG)
2344 dbxout_init (asm_out_file, main_input_filename, getdecls ());
2346 #ifdef SDB_DEBUGGING_INFO
2347 if (write_symbols == SDB_DEBUG)
2348 sdbout_init (asm_out_file, main_input_filename, getdecls ());
2350 #ifdef DWARF_DEBUGGING_INFO
2351 if (write_symbols == DWARF_DEBUG)
2352 dwarfout_init (asm_out_file, main_input_filename);
2354 #ifdef DWARF2_UNWIND_INFO
2355 if (dwarf2out_do_frame ())
2356 dwarf2out_frame_init ();
2358 #ifdef DWARF2_DEBUGGING_INFO
2359 if (write_symbols == DWARF2_DEBUG)
2360 dwarf2out_init (asm_out_file, main_input_filename);
2362 timevar_pop (TV_SYMOUT);
2364 /* Initialize yet another pass. */
2366 init_final (main_input_filename);
2367 init_branch_prob (dump_base_name);
2369 timevar_push (TV_PARSE);
2371 /* Call the parser, which parses the entire file
2372 (calling rest_of_compilation for each function). */
2374 if (yyparse () != 0)
2376 if (errorcount == 0)
2377 fnotice (stderr, "Errors detected in input file (your bison.simple is out of date)\n");
2379 /* In case there were missing closebraces,
2380 get us back to the global binding level. */
2381 while (! global_bindings_p ())
2385 /* Compilation is now finished except for writing
2386 what's left of the symbol table output. */
2388 timevar_pop (TV_PARSE);
2390 if (flag_syntax_only)
2393 globals = getdecls ();
2395 /* Really define vars that have had only a tentative definition.
2396 Really output inline functions that must actually be callable
2397 and have not been output so far. */
2400 int len = list_length (globals);
2401 tree *vec = (tree *) xmalloc (sizeof (tree) * len);
2405 /* Process the decls in reverse order--earliest first.
2406 Put them into VEC from back to front, then take out from front. */
2408 for (i = 0, decl = globals; i < len; i++, decl = TREE_CHAIN (decl))
2409 vec[len - i - 1] = decl;
2411 wrapup_global_declarations (vec, len);
2413 /* This must occur after the loop to output deferred functions. Else
2414 the profiler initializer would not be emitted if all the functions
2415 in this compilation unit were deferred.
2417 output_func_start_profiler can not cause any additional functions or
2418 data to need to be output, so it need not be in the deferred function
2420 output_func_start_profiler ();
2422 /* Now that all possible functions have been output, we can dump
2423 the exception table. */
2425 #ifndef IA64_UNWIND_INFO
2426 output_exception_table ();
2428 free_exception_table ();
2430 check_global_declarations (vec, len);
2436 /* Write out any pending weak symbol declarations. */
2440 /* Do dbx symbols. */
2441 timevar_push (TV_SYMOUT);
2442 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
2443 if (write_symbols == DBX_DEBUG || write_symbols == XCOFF_DEBUG)
2444 dbxout_finish (asm_out_file, main_input_filename);
2447 #ifdef DWARF_DEBUGGING_INFO
2448 if (write_symbols == DWARF_DEBUG)
2452 #ifdef DWARF2_UNWIND_INFO
2453 if (dwarf2out_do_frame ())
2454 dwarf2out_frame_finish ();
2457 #ifdef DWARF2_DEBUGGING_INFO
2458 if (write_symbols == DWARF2_DEBUG)
2459 dwarf2out_finish ();
2461 timevar_pop (TV_SYMOUT);
2463 /* Output some stuff at end of file if nec. */
2465 end_final (dump_base_name);
2467 if (profile_arc_flag || flag_test_coverage || flag_branch_probabilities)
2469 timevar_push (TV_DUMP);
2470 open_dump_file (DFI_bp, NULL);
2474 close_dump_file (DFI_bp, NULL, NULL_RTX);
2475 timevar_pop (TV_DUMP);
2479 ASM_FILE_END (asm_out_file);
2482 /* Language-specific end of compilation actions. */
2486 /* Close the dump files. */
2488 if (flag_gen_aux_info)
2490 fclose (aux_info_file);
2492 unlink (aux_info_file_name);
2495 if (optimize > 0 && open_dump_file (DFI_combine, NULL))
2497 timevar_push (TV_DUMP);
2498 dump_combine_total_stats (rtl_dump_file);
2499 close_dump_file (DFI_combine, NULL, NULL_RTX);
2500 timevar_pop (TV_DUMP);
2503 /* Close non-debugging input and output files. Take special care to note
2504 whether fclose returns an error, since the pages might still be on the
2505 buffer chain while the file is open. */
2509 if (ferror (asm_out_file) != 0 || fclose (asm_out_file) != 0)
2510 fatal_io_error (asm_file_name);
2512 /* Do whatever is necessary to finish printing the graphs. */
2513 if (graph_dump_format != no_graph)
2517 for (i = 0; i < DFI_MAX; ++i)
2518 if (dump_file[i].initialized && dump_file[i].graph_dump_p)
2523 sprintf (seq, ".%02d.", i);
2524 suffix = concat (seq, dump_file[i].extension, NULL);
2525 finish_graph_dump_file (dump_base_name, suffix);
2532 ggc_print_statistics ();
2533 stringpool_statistics ();
2536 /* Free up memory for the benefit of leak detectors. */
2539 /* Stop timing total execution time. */
2540 timevar_stop (TV_TOTAL);
2542 /* Print the times. */
2544 timevar_print (stderr);
2547 /* This is called from various places for FUNCTION_DECL, VAR_DECL,
2548 and TYPE_DECL nodes.
2550 This does nothing for local (non-static) variables, unless the
2551 variable is a register variable with an ASMSPEC. In that case, or
2552 if the variable is not an automatice, it sets up the RTL and
2553 outputs any assembler code (label definition, storage allocation
2554 and initialization).
2556 DECL is the declaration. If ASMSPEC is nonzero, it specifies
2557 the assembler symbol name to be used. TOP_LEVEL is nonzero
2558 if this declaration is not within a function. */
2561 rest_of_decl_compilation (decl, asmspec, top_level, at_end)
2563 const char *asmspec;
2567 /* Declarations of variables, and of functions defined elsewhere. */
2569 /* The most obvious approach, to put an #ifndef around where
2570 this macro is used, doesn't work since it's inside a macro call. */
2571 #ifndef ASM_FINISH_DECLARE_OBJECT
2572 #define ASM_FINISH_DECLARE_OBJECT(FILE, DECL, TOP, END)
2575 /* Forward declarations for nested functions are not "external",
2576 but we need to treat them as if they were. */
2577 if (TREE_STATIC (decl) || DECL_EXTERNAL (decl)
2578 || TREE_CODE (decl) == FUNCTION_DECL)
2580 timevar_push (TV_VARCONST);
2581 make_decl_rtl (decl, asmspec, top_level);
2582 /* Initialized extern variable exists to be replaced
2583 with its value, or represents something that will be
2584 output in another file. */
2585 if (! (TREE_CODE (decl) == VAR_DECL
2586 && DECL_EXTERNAL (decl) && TREE_READONLY (decl)
2587 && DECL_INITIAL (decl) != 0
2588 && DECL_INITIAL (decl) != error_mark_node))
2589 /* Don't output anything
2590 when a tentative file-scope definition is seen.
2591 But at end of compilation, do output code for them. */
2592 if (! (! at_end && top_level
2593 && (DECL_INITIAL (decl) == 0
2594 || DECL_INITIAL (decl) == error_mark_node)))
2595 assemble_variable (decl, top_level, at_end, 0);
2596 if (decl == last_assemble_variable_decl)
2598 ASM_FINISH_DECLARE_OBJECT (asm_out_file, decl,
2601 timevar_pop (TV_VARCONST);
2603 else if (DECL_REGISTER (decl) && asmspec != 0)
2605 if (decode_reg_name (asmspec) >= 0)
2607 DECL_RTL (decl) = 0;
2608 make_decl_rtl (decl, asmspec, top_level);
2612 error ("invalid register name `%s' for register variable", asmspec);
2613 DECL_REGISTER (decl) = 0;
2614 make_decl_rtl (decl, NULL, top_level);
2617 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
2618 else if ((write_symbols == DBX_DEBUG || write_symbols == XCOFF_DEBUG)
2619 && TREE_CODE (decl) == TYPE_DECL)
2621 timevar_push (TV_SYMOUT);
2622 dbxout_symbol (decl, 0);
2623 timevar_pop (TV_SYMOUT);
2626 #ifdef SDB_DEBUGGING_INFO
2627 else if (write_symbols == SDB_DEBUG && top_level
2628 && TREE_CODE (decl) == TYPE_DECL)
2630 timevar_push (TV_SYMOUT);
2631 sdbout_symbol (decl, 0);
2632 timevar_pop (TV_SYMOUT);
2637 /* Called after finishing a record, union or enumeral type. */
2640 rest_of_type_compilation (type, toplev)
2641 #if defined(DBX_DEBUGGING_INFO) || defined(XCOFF_DEBUGGING_INFO) || defined (SDB_DEBUGGING_INFO)
2645 tree type ATTRIBUTE_UNUSED;
2646 int toplev ATTRIBUTE_UNUSED;
2649 timevar_push (TV_SYMOUT);
2650 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
2651 if (write_symbols == DBX_DEBUG || write_symbols == XCOFF_DEBUG)
2652 dbxout_symbol (TYPE_STUB_DECL (type), !toplev);
2654 #ifdef SDB_DEBUGGING_INFO
2655 if (write_symbols == SDB_DEBUG)
2656 sdbout_symbol (TYPE_STUB_DECL (type), !toplev);
2658 #ifdef DWARF2_DEBUGGING_INFO
2659 if (write_symbols == DWARF2_DEBUG && toplev)
2660 dwarf2out_decl (TYPE_STUB_DECL (type));
2662 timevar_pop (TV_SYMOUT);
2665 /* DECL is an inline function, whose body is present, but which is not
2666 being output at this point. (We're putting that off until we need
2667 to do it.) If there are any actions that need to take place,
2668 including the emission of debugging information for the function,
2669 this is where they should go. This function may be called by
2670 language-dependent code for front-ends that do not even generate
2671 RTL for functions that don't need to be put out. */
2674 note_deferral_of_defined_inline_function (decl)
2675 tree decl ATTRIBUTE_UNUSED;
2677 #ifdef DWARF_DEBUGGING_INFO
2678 /* Generate the DWARF info for the "abstract" instance of a function
2679 which we may later generate inlined and/or out-of-line instances
2681 if (write_symbols == DWARF_DEBUG && DECL_INLINE (decl))
2683 /* The front-end may not have set CURRENT_FUNCTION_DECL, but the
2684 DWARF code expects it to be set in this case. Intuitively,
2685 DECL is the function we just finished defining, so setting
2686 CURRENT_FUNCTION_DECL is sensible. */
2687 tree saved_cfd = current_function_decl;
2688 current_function_decl = decl;
2690 /* Let the DWARF code do its work. */
2691 set_decl_abstract_flags (decl, 1);
2692 dwarfout_file_scope_decl (decl, 0);
2693 set_decl_abstract_flags (decl, 0);
2695 /* Reset CURRENT_FUNCTION_DECL. */
2696 current_function_decl = saved_cfd;
2701 /* This is called from finish_function (within yyparse)
2702 after each top-level definition is parsed.
2703 It is supposed to compile that function or variable
2704 and output the assembler code for it.
2705 After we return, the tree storage is freed. */
2708 rest_of_compilation (decl)
2714 int rebuild_label_notes_after_reload;
2715 int register_life_up_to_date;
2717 timevar_push (TV_REST_OF_COMPILATION);
2719 /* Now that we're out of the frontend, we shouldn't have any more
2720 CONCATs anywhere. */
2721 generating_concat_p = 0;
2723 /* When processing delayed functions, prepare_function_start() won't
2724 have been run to re-initialize it. */
2725 cse_not_expected = ! optimize;
2727 /* First, make sure that NOTE_BLOCK is set correctly for each
2728 NOTE_INSN_BLOCK_BEG/NOTE_INSN_BLOCK_END note. */
2729 if (!cfun->x_whole_function_mode_p)
2732 /* Then remove any notes we don't need. That will make iterating
2733 over the instruction sequence faster, and allow the garbage
2734 collector to reclaim the memory used by the notes. */
2735 remove_unnecessary_notes ();
2737 /* In function-at-a-time mode, we do not attempt to keep the BLOCK
2738 tree in sensible shape. So, we just recalculate it here. */
2739 if (cfun->x_whole_function_mode_p)
2744 /* If we are reconsidering an inline function
2745 at the end of compilation, skip the stuff for making it inline. */
2747 if (DECL_SAVED_INSNS (decl) == 0)
2753 /* If this is nested inside an inlined external function, pretend
2754 it was only declared. Since we cannot inline such functions,
2755 generating code for this one is not only not necessary but will
2756 confuse some debugging output writers. */
2757 for (parent = DECL_CONTEXT (current_function_decl);
2758 parent != NULL_TREE;
2759 parent = get_containing_scope (parent))
2760 if (TREE_CODE (parent) == FUNCTION_DECL
2761 && DECL_INLINE (parent) && DECL_EXTERNAL (parent))
2763 DECL_INITIAL (decl) = 0;
2764 goto exit_rest_of_compilation;
2767 /* If requested, consider whether to make this function inline. */
2768 if (DECL_INLINE (decl) || flag_inline_functions)
2770 timevar_push (TV_INTEGRATION);
2771 lose = function_cannot_inline_p (decl);
2772 timevar_pop (TV_INTEGRATION);
2773 if (lose || ! optimize)
2775 if (warn_inline && DECL_INLINE (decl))
2776 warning_with_decl (decl, lose);
2777 DECL_ABSTRACT_ORIGIN (decl) = 0;
2778 /* Don't really compile an extern inline function.
2779 If we can't make it inline, pretend
2780 it was only declared. */
2781 if (DECL_EXTERNAL (decl))
2783 DECL_INITIAL (decl) = 0;
2784 goto exit_rest_of_compilation;
2788 /* ??? Note that this has the effect of making it look
2789 like "inline" was specified for a function if we choose
2790 to inline it. This isn't quite right, but it's
2791 probably not worth the trouble to fix. */
2792 inlinable = DECL_INLINE (decl) = 1;
2795 insns = get_insns ();
2797 /* Dump the rtl code if we are dumping rtl. */
2799 if (open_dump_file (DFI_rtl, decl))
2801 if (DECL_SAVED_INSNS (decl))
2802 fprintf (rtl_dump_file, ";; (integrable)\n\n");
2803 close_dump_file (DFI_rtl, print_rtl, insns);
2806 /* If function is inline, and we don't yet know whether to
2807 compile it by itself, defer decision till end of compilation.
2808 finish_compilation will call rest_of_compilation again
2809 for those functions that need to be output. Also defer those
2810 functions that we are supposed to defer. */
2813 || (DECL_INLINE (decl)
2814 && ((! TREE_PUBLIC (decl) && ! TREE_ADDRESSABLE (decl)
2815 && ! flag_keep_inline_functions)
2816 || DECL_EXTERNAL (decl))))
2817 DECL_DEFER_OUTPUT (decl) = 1;
2819 if (DECL_INLINE (decl))
2820 /* DWARF wants seperate debugging info for abstract and
2821 concrete instances of all inline functions, including those
2822 declared inline but not inlined, and those inlined even
2823 though they weren't declared inline. Conveniently, that's
2824 what DECL_INLINE means at this point. */
2825 note_deferral_of_defined_inline_function (decl);
2827 if (DECL_DEFER_OUTPUT (decl))
2829 /* If -Wreturn-type, we have to do a bit of compilation. We just
2830 want to call jump_optimize to figure out whether or not we can
2831 fall off the end of the function; we do the minimum amount of
2832 work necessary to make that safe. And, we set optimize to zero
2833 to keep jump_optimize from working too hard. */
2834 if (warn_return_type)
2836 int saved_optimize = optimize;
2839 find_exception_handler_labels ();
2840 jump_optimize (insns, !JUMP_CROSS_JUMP, !JUMP_NOOP_MOVES,
2841 !JUMP_AFTER_REGSCAN);
2842 optimize = saved_optimize;
2845 current_function_nothrow = nothrow_function_p ();
2846 if (current_function_nothrow)
2847 /* Now we know that this can't throw; set the flag for the benefit
2848 of other functions later in this translation unit. */
2849 TREE_NOTHROW (current_function_decl) = 1;
2851 timevar_push (TV_INTEGRATION);
2852 save_for_inline (decl);
2853 timevar_pop (TV_INTEGRATION);
2854 DECL_SAVED_INSNS (decl)->inlinable = inlinable;
2855 goto exit_rest_of_compilation;
2858 /* If specified extern inline but we aren't inlining it, we are
2859 done. This goes for anything that gets here with DECL_EXTERNAL
2860 set, not just things with DECL_INLINE. */
2861 if (DECL_EXTERNAL (decl))
2862 goto exit_rest_of_compilation;
2865 init_EXPR_INSN_LIST_cache ();
2869 /* Initialize some variables used by the optimizers. */
2870 init_function_for_compilation ();
2872 if (! DECL_DEFER_OUTPUT (decl))
2873 TREE_ASM_WRITTEN (decl) = 1;
2875 /* Now that integrate will no longer see our rtl, we need not
2876 distinguish between the return value of this function and the
2877 return value of called functions. Also, we can remove all SETs
2878 of subregs of hard registers; they are only here because of
2880 rtx_equal_function_value_matters = 0;
2881 purge_hard_subreg_sets (get_insns ());
2883 /* Don't return yet if -Wreturn-type; we need to do jump_optimize. */
2884 if ((rtl_dump_and_exit || flag_syntax_only) && !warn_return_type)
2885 goto exit_rest_of_compilation;
2887 /* Emit code to get eh context, if needed. */
2890 /* We may have potential sibling or tail recursion sites. Select one
2891 (of possibly multiple) methods of performing the call. */
2892 if (flag_optimize_sibling_calls)
2894 timevar_push (TV_JUMP);
2895 open_dump_file (DFI_sibling, decl);
2897 optimize_sibling_and_tail_recursive_calls ();
2899 close_dump_file (DFI_sibling, print_rtl, get_insns ());
2900 timevar_pop (TV_JUMP);
2904 /* If we are doing position-independent code generation, now
2905 is the time to output special prologues and epilogues.
2906 We do not want to do this earlier, because it just clutters
2907 up inline functions with meaningless insns. */
2912 insns = get_insns ();
2914 /* Copy any shared structure that should not be shared. */
2915 unshare_all_rtl (current_function_decl, insns);
2917 #ifdef SETJMP_VIA_SAVE_AREA
2918 /* This must be performed before virutal register instantiation. */
2919 if (current_function_calls_alloca)
2920 optimize_save_area_alloca (insns);
2923 /* Instantiate all virtual registers. */
2924 instantiate_virtual_regs (current_function_decl, insns);
2926 /* Find all the EH handlers. */
2927 find_exception_handler_labels ();
2929 open_dump_file (DFI_jump, decl);
2931 /* Always do one jump optimization pass to ensure that JUMP_LABEL fields
2932 are initialized and to compute whether control can drop off the end
2935 timevar_push (TV_JUMP);
2936 /* Turn NOTE_INSN_EXPECTED_VALUE into REG_BR_PROB. Do this
2937 before jump optimization switches branch directions. */
2938 expected_value_to_br_prob ();
2940 reg_scan (insns, max_reg_num (), 0);
2941 jump_optimize (insns, !JUMP_CROSS_JUMP, !JUMP_NOOP_MOVES,
2942 JUMP_AFTER_REGSCAN);
2944 timevar_pop (TV_JUMP);
2946 /* Now is when we stop if -fsyntax-only and -Wreturn-type. */
2947 if (rtl_dump_and_exit || flag_syntax_only || DECL_DEFER_OUTPUT (decl))
2949 close_dump_file (DFI_jump, print_rtl, insns);
2950 goto exit_rest_of_compilation;
2953 timevar_push (TV_JUMP);
2957 find_basic_blocks (insns, max_reg_num (), rtl_dump_file);
2958 cleanup_cfg (insns);
2960 /* ??? Run if-conversion before delete_null_pointer_checks,
2961 since the later does not preserve the CFG. This should
2962 be changed -- no since converting if's that are going to
2964 timevar_push (TV_IFCVT);
2966 timevar_pop (TV_IFCVT);
2968 /* Try to identify useless null pointer tests and delete them. */
2969 if (flag_delete_null_pointer_checks)
2970 delete_null_pointer_checks (insns);
2973 /* Jump optimization, and the removal of NULL pointer checks, may
2974 have reduced the number of instructions substantially. CSE, and
2975 future passes, allocate arrays whose dimensions involve the
2976 maximum instruction UID, so if we can reduce the maximum UID
2977 we'll save big on memory. */
2978 renumber_insns (rtl_dump_file);
2979 timevar_pop (TV_JUMP);
2981 close_dump_file (DFI_jump, print_rtl, insns);
2985 /* Perform common subexpression elimination.
2986 Nonzero value from `cse_main' means that jumps were simplified
2987 and some code may now be unreachable, so do
2988 jump optimization again. */
2992 open_dump_file (DFI_cse, decl);
2993 timevar_push (TV_CSE);
2995 reg_scan (insns, max_reg_num (), 1);
2997 if (flag_thread_jumps)
2999 timevar_push (TV_JUMP);
3000 thread_jumps (insns, max_reg_num (), 1);
3001 timevar_pop (TV_JUMP);
3004 tem = cse_main (insns, max_reg_num (), 0, rtl_dump_file);
3006 /* If we are not running the second CSE pass, then we are no longer
3007 expecting CSE to be run. */
3008 cse_not_expected = !flag_rerun_cse_after_loop;
3010 if (tem || optimize > 1)
3012 timevar_push (TV_JUMP);
3013 jump_optimize (insns, !JUMP_CROSS_JUMP, !JUMP_NOOP_MOVES,
3014 !JUMP_AFTER_REGSCAN);
3015 timevar_pop (TV_JUMP);
3018 /* Run this after jump optmizations remove all the unreachable code
3019 so that unreachable code will not keep values live. */
3020 delete_trivially_dead_insns (insns, max_reg_num ());
3022 /* Try to identify useless null pointer tests and delete them. */
3023 if (flag_delete_null_pointer_checks)
3025 timevar_push (TV_JUMP);
3026 find_basic_blocks (insns, max_reg_num (), rtl_dump_file);
3028 cleanup_cfg (insns);
3030 delete_null_pointer_checks (insns);
3031 timevar_pop (TV_JUMP);
3034 /* The second pass of jump optimization is likely to have
3035 removed a bunch more instructions. */
3036 renumber_insns (rtl_dump_file);
3038 timevar_pop (TV_CSE);
3039 close_dump_file (DFI_cse, print_rtl, insns);
3042 open_dump_file (DFI_addressof, decl);
3044 purge_addressof (insns);
3045 reg_scan (insns, max_reg_num (), 1);
3047 close_dump_file (DFI_addressof, print_rtl, insns);
3051 if (optimize > 0 && flag_ssa)
3053 /* Convert to SSA form. */
3055 timevar_push (TV_TO_SSA);
3056 open_dump_file (DFI_ssa, decl);
3058 find_basic_blocks (insns, max_reg_num (), rtl_dump_file);
3059 cleanup_cfg (insns);
3062 close_dump_file (DFI_ssa, print_rtl_with_bb, insns);
3063 timevar_pop (TV_TO_SSA);
3065 /* The SSA implementation uses basic block numbers in its phi
3066 nodes. Thus, changing the control-flow graph or the basic
3067 blocks, e.g., calling find_basic_blocks () or cleanup_cfg (),
3068 may cause problems. */
3072 /* Remove dead code. */
3074 timevar_push (TV_DEAD_CODE_ELIM);
3075 open_dump_file (DFI_dce, decl);
3077 insns = get_insns ();
3078 eliminate_dead_code();
3080 close_dump_file (DFI_dce, print_rtl_with_bb, insns);
3081 timevar_pop (TV_DEAD_CODE_ELIM);
3084 /* Convert from SSA form. */
3086 timevar_push (TV_FROM_SSA);
3087 open_dump_file (DFI_ussa, decl);
3089 convert_from_ssa ();
3090 /* New registers have been created. Rescan their usage. */
3091 reg_scan (insns, max_reg_num (), 1);
3092 /* Life analysis used in SSA adds log_links but these
3093 shouldn't be there until the flow stage, so clear
3095 clear_log_links (insns);
3097 close_dump_file (DFI_ussa, print_rtl_with_bb, insns);
3098 timevar_pop (TV_FROM_SSA);
3103 /* Perform global cse. */
3105 if (optimize > 0 && flag_gcse)
3107 timevar_push (TV_GCSE);
3108 open_dump_file (DFI_gcse, decl);
3110 find_basic_blocks (insns, max_reg_num (), rtl_dump_file);
3111 cleanup_cfg (insns);
3112 tem = gcse_main (insns, rtl_dump_file);
3114 /* If gcse altered any jumps, rerun jump optimizations to clean
3118 timevar_push (TV_JUMP);
3119 jump_optimize (insns, !JUMP_CROSS_JUMP, !JUMP_NOOP_MOVES,
3120 !JUMP_AFTER_REGSCAN);
3121 timevar_pop (TV_JUMP);
3124 close_dump_file (DFI_gcse, print_rtl, insns);
3125 timevar_pop (TV_GCSE);
3130 /* Move constant computations out of loops. */
3134 timevar_push (TV_LOOP);
3135 open_dump_file (DFI_loop, decl);
3137 if (flag_rerun_loop_opt)
3139 /* We only want to perform unrolling once. */
3141 loop_optimize (insns, rtl_dump_file, 0);
3143 /* The first call to loop_optimize makes some instructions
3144 trivially dead. We delete those instructions now in the
3145 hope that doing so will make the heuristics in loop work
3146 better and possibly speed up compilation. */
3147 delete_trivially_dead_insns (insns, max_reg_num ());
3149 /* The regscan pass is currently necessary as the alias
3150 analysis code depends on this information. */
3151 reg_scan (insns, max_reg_num (), 1);
3153 loop_optimize (insns, rtl_dump_file,
3154 (flag_unroll_loops ? LOOP_UNROLL : 0) | LOOP_BCT);
3156 close_dump_file (DFI_loop, print_rtl, insns);
3157 timevar_pop (TV_LOOP);
3164 timevar_push (TV_CSE2);
3165 open_dump_file (DFI_cse2, decl);
3167 if (flag_rerun_cse_after_loop)
3169 /* Running another jump optimization pass before the second
3170 cse pass sometimes simplifies the RTL enough to allow
3171 the second CSE pass to do a better job. Jump_optimize can change
3172 max_reg_num so we must rerun reg_scan afterwards.
3173 ??? Rework to not call reg_scan so often. */
3174 timevar_push (TV_JUMP);
3176 reg_scan (insns, max_reg_num (), 0);
3177 jump_optimize (insns, !JUMP_CROSS_JUMP,
3178 !JUMP_NOOP_MOVES, JUMP_AFTER_REGSCAN);
3180 timevar_push (TV_IFCVT);
3182 find_basic_blocks (insns, max_reg_num (), rtl_dump_file);
3183 cleanup_cfg (insns);
3186 timevar_pop(TV_IFCVT);
3188 timevar_pop (TV_JUMP);
3190 reg_scan (insns, max_reg_num (), 0);
3191 tem = cse_main (insns, max_reg_num (), 1, rtl_dump_file);
3195 timevar_push (TV_JUMP);
3196 jump_optimize (insns, !JUMP_CROSS_JUMP,
3197 !JUMP_NOOP_MOVES, !JUMP_AFTER_REGSCAN);
3198 timevar_pop (TV_JUMP);
3202 if (flag_thread_jumps)
3204 /* This pass of jump threading straightens out code
3205 that was kinked by loop optimization. */
3206 timevar_push (TV_JUMP);
3207 reg_scan (insns, max_reg_num (), 0);
3208 thread_jumps (insns, max_reg_num (), 0);
3209 timevar_pop (TV_JUMP);
3212 close_dump_file (DFI_cse2, print_rtl, insns);
3213 timevar_pop (TV_CSE2);
3218 cse_not_expected = 1;
3222 /* Do control and data flow analysis; wrote some of the results to
3225 timevar_push (TV_FLOW);
3226 open_dump_file (DFI_cfg, decl);
3228 find_basic_blocks (insns, max_reg_num (), rtl_dump_file);
3229 cleanup_cfg (insns);
3230 check_function_return_warnings ();
3232 close_dump_file (DFI_cfg, print_rtl_with_bb, insns);
3234 if (profile_arc_flag || flag_test_coverage || flag_branch_probabilities)
3236 timevar_push (TV_BRANCH_PROB);
3237 open_dump_file (DFI_bp, decl);
3241 close_dump_file (DFI_bp, print_rtl_with_bb, insns);
3242 timevar_pop (TV_BRANCH_PROB);
3245 open_dump_file (DFI_life, decl);
3250 /* Discover and record the loop depth at the head of each basic
3251 block. The loop infrastructure does the real job for us. */
3252 flow_loops_find (&loops, LOOP_TREE);
3254 /* Estimate using heuristics if no profiling info is available. */
3255 estimate_probability (&loops);
3258 flow_loops_dump (&loops, rtl_dump_file, NULL, 0);
3260 flow_loops_free (&loops);
3262 life_analysis (insns, rtl_dump_file, PROP_FINAL);
3263 mark_constant_function ();
3264 timevar_pop (TV_FLOW);
3266 register_life_up_to_date = 1;
3269 if (warn_uninitialized || extra_warnings)
3271 uninitialized_vars_warning (DECL_INITIAL (decl));
3273 setjmp_args_warning ();
3276 close_dump_file (DFI_life, print_rtl_with_bb, insns);
3280 /* If -opt, try combining insns through substitution. */
3284 int rebuild_jump_labels_after_combine = 0;
3286 timevar_push (TV_COMBINE);
3287 open_dump_file (DFI_combine, decl);
3289 rebuild_jump_labels_after_combine
3290 = combine_instructions (insns, max_reg_num ());
3292 /* Combining insns may have turned an indirect jump into a
3293 direct jump. Rebuid the JUMP_LABEL fields of jumping
3295 if (rebuild_jump_labels_after_combine)
3297 timevar_push (TV_JUMP);
3298 rebuild_jump_labels (insns);
3299 timevar_pop (TV_JUMP);
3301 timevar_push (TV_FLOW);
3302 find_basic_blocks (insns, max_reg_num (), rtl_dump_file);
3303 cleanup_cfg (insns);
3305 /* Blimey. We've got to have the CFG up to date for the call to
3306 if_convert below. However, the random deletion of blocks
3307 without updating life info can wind up with Wierd Stuff in
3308 global_live_at_end. We then run sched1, which updates things
3309 properly, discovers the wierdness and aborts. */
3310 update_life_info (NULL, UPDATE_LIFE_GLOBAL_RM_NOTES,
3311 PROP_DEATH_NOTES | PROP_KILL_DEAD_CODE
3312 | PROP_SCAN_DEAD_CODE);
3314 timevar_pop (TV_FLOW);
3317 close_dump_file (DFI_combine, print_rtl_with_bb, insns);
3318 timevar_pop (TV_COMBINE);
3323 /* Rerun if-conversion, as combine may have simplified things enough to
3324 now meet sequence length restrictions. */
3327 timevar_push (TV_IFCVT);
3328 open_dump_file (DFI_ce, decl);
3334 close_dump_file (DFI_ce, print_rtl_with_bb, insns);
3335 timevar_pop (TV_IFCVT);
3338 /* Register allocation pre-pass, to reduce number of moves
3339 necessary for two-address machines. */
3340 if (optimize > 0 && (flag_regmove || flag_expensive_optimizations))
3342 timevar_push (TV_REGMOVE);
3343 open_dump_file (DFI_regmove, decl);
3345 regmove_optimize (insns, max_reg_num (), rtl_dump_file);
3347 close_dump_file (DFI_regmove, print_rtl_with_bb, insns);
3348 timevar_pop (TV_REGMOVE);
3353 /* Any of the several passes since flow1 will have munged register
3354 lifetime data a bit. */
3356 register_life_up_to_date = 0;
3358 #ifdef OPTIMIZE_MODE_SWITCHING
3359 timevar_push (TV_GCSE);
3361 if (optimize_mode_switching (NULL_PTR))
3363 /* We did work, and so had to regenerate global life information.
3364 Take advantage of this and don't re-recompute register life
3365 information below. */
3366 register_life_up_to_date = 1;
3369 timevar_pop (TV_GCSE);
3372 #ifdef INSN_SCHEDULING
3374 /* Print function header into sched dump now
3375 because doing the sched analysis makes some of the dump. */
3376 if (optimize > 0 && flag_schedule_insns)
3378 timevar_push (TV_SCHED);
3379 open_dump_file (DFI_sched, decl);
3381 /* Do control and data sched analysis,
3382 and write some of the results to dump file. */
3384 schedule_insns (rtl_dump_file);
3386 close_dump_file (DFI_sched, print_rtl_with_bb, insns);
3387 timevar_pop (TV_SCHED);
3391 /* Register lifetime information was updated as part of verifying
3393 register_life_up_to_date = 1;
3397 /* Determine if the current function is a leaf before running reload
3398 since this can impact optimizations done by the prologue and
3399 epilogue thus changing register elimination offsets. */
3400 current_function_is_leaf = leaf_function_p ();
3402 timevar_push (TV_LOCAL_ALLOC);
3403 open_dump_file (DFI_lreg, decl);
3405 /* Allocate pseudo-regs that are used only within 1 basic block.
3407 RUN_JUMP_AFTER_RELOAD records whether or not we need to rerun the
3408 jump optimizer after register allocation and reloading are finished. */
3410 if (! register_life_up_to_date)
3411 recompute_reg_usage (insns, ! optimize_size);
3412 regclass (insns, max_reg_num (), rtl_dump_file);
3413 rebuild_label_notes_after_reload = local_alloc ();
3415 timevar_pop (TV_LOCAL_ALLOC);
3417 if (dump_file[DFI_lreg].enabled)
3419 timevar_push (TV_DUMP);
3421 dump_flow_info (rtl_dump_file);
3422 dump_local_alloc (rtl_dump_file);
3424 close_dump_file (DFI_lreg, print_rtl_with_bb, insns);
3425 timevar_pop (TV_DUMP);
3430 timevar_push (TV_GLOBAL_ALLOC);
3431 open_dump_file (DFI_greg, decl);
3433 /* If optimizing, allocate remaining pseudo-regs. Do the reload
3434 pass fixing up any insns that are invalid. */
3437 failure = global_alloc (rtl_dump_file);
3440 build_insn_chain (insns);
3441 failure = reload (insns, 0);
3444 timevar_pop (TV_GLOBAL_ALLOC);
3446 if (dump_file[DFI_greg].enabled)
3448 timevar_push (TV_DUMP);
3450 dump_global_regs (rtl_dump_file);
3452 close_dump_file (DFI_greg, print_rtl_with_bb, insns);
3453 timevar_pop (TV_DUMP);
3457 goto exit_rest_of_compilation;
3461 open_dump_file (DFI_postreload, decl);
3463 /* Do a very simple CSE pass over just the hard registers. */
3466 timevar_push (TV_RELOAD_CSE_REGS);
3467 reload_cse_regs (insns);
3468 timevar_pop (TV_RELOAD_CSE_REGS);
3471 /* If optimizing, then go ahead and split insns now since we are about
3472 to recompute flow information anyway. */
3475 int old_labelnum = max_label_num ();
3477 split_all_insns (0);
3478 rebuild_label_notes_after_reload |= old_labelnum != max_label_num ();
3481 /* Register allocation and reloading may have turned an indirect jump into
3482 a direct jump. If so, we must rebuild the JUMP_LABEL fields of
3483 jumping instructions. */
3484 if (rebuild_label_notes_after_reload)
3486 timevar_push (TV_JUMP);
3488 rebuild_jump_labels (insns);
3490 timevar_pop (TV_JUMP);
3493 close_dump_file (DFI_postreload, print_rtl_with_bb, insns);
3495 /* Re-create the death notes which were deleted during reload. */
3496 timevar_push (TV_FLOW2);
3497 open_dump_file (DFI_flow2, decl);
3499 jump_optimize (insns, !JUMP_CROSS_JUMP,
3500 JUMP_NOOP_MOVES, !JUMP_AFTER_REGSCAN);
3501 find_basic_blocks (insns, max_reg_num (), rtl_dump_file);
3503 /* On some machines, the prologue and epilogue code, or parts thereof,
3504 can be represented as RTL. Doing so lets us schedule insns between
3505 it and the rest of the code and also allows delayed branch
3506 scheduling to operate in the epilogue. */
3507 thread_prologue_and_epilogue_insns (insns);
3511 cleanup_cfg (insns);
3512 life_analysis (insns, rtl_dump_file, PROP_FINAL);
3514 /* This is kind of a heuristic. We need to run combine_stack_adjustments
3515 even for machines with possibly nonzero RETURN_POPS_ARGS
3516 and ACCUMULATE_OUTGOING_ARGS. We expect that only ports having
3517 push instructions will have popping returns. */
3518 #ifndef PUSH_ROUNDING
3519 if (!ACCUMULATE_OUTGOING_ARGS)
3521 combine_stack_adjustments ();
3526 flow2_completed = 1;
3528 close_dump_file (DFI_flow2, print_rtl_with_bb, insns);
3529 timevar_pop (TV_FLOW2);
3531 #ifdef HAVE_peephole2
3532 if (optimize > 0 && flag_peephole2)
3534 timevar_push (TV_PEEPHOLE2);
3535 open_dump_file (DFI_peephole2, decl);
3537 peephole2_optimize (rtl_dump_file);
3539 close_dump_file (DFI_peephole2, print_rtl_with_bb, insns);
3540 timevar_pop (TV_PEEPHOLE2);
3544 if (optimize > 0 && flag_rename_registers)
3546 timevar_push (TV_RENAME_REGISTERS);
3547 open_dump_file (DFI_rnreg, decl);
3549 regrename_optimize ();
3551 close_dump_file (DFI_rnreg, print_rtl_with_bb, insns);
3552 timevar_pop (TV_RENAME_REGISTERS);
3557 timevar_push (TV_IFCVT2);
3558 open_dump_file (DFI_ce2, decl);
3562 close_dump_file (DFI_ce2, print_rtl_with_bb, insns);
3563 timevar_pop (TV_IFCVT2);
3566 #ifdef INSN_SCHEDULING
3567 if (optimize > 0 && flag_schedule_insns_after_reload)
3569 timevar_push (TV_SCHED2);
3570 open_dump_file (DFI_sched2, decl);
3572 /* Do control and data sched analysis again,
3573 and write some more of the results to dump file. */
3575 schedule_insns (rtl_dump_file);
3577 close_dump_file (DFI_sched2, print_rtl_with_bb, insns);
3578 timevar_pop (TV_SCHED2);
3584 #ifdef LEAF_REGISTERS
3585 current_function_uses_only_leaf_regs
3586 = optimize > 0 && only_leaf_regs_used () && leaf_function_p ();
3589 if (optimize > 0 && flag_reorder_blocks)
3591 timevar_push (TV_REORDER_BLOCKS);
3592 open_dump_file (DFI_bbro, decl);
3594 reorder_basic_blocks ();
3596 close_dump_file (DFI_bbro, print_rtl_with_bb, insns);
3597 timevar_pop (TV_REORDER_BLOCKS);
3600 /* One more attempt to remove jumps to .+1 left by dead-store elimination.
3601 Also do cross-jumping this time and delete no-op move insns. */
3605 timevar_push (TV_JUMP);
3606 open_dump_file (DFI_jump2, decl);
3608 jump_optimize (insns, JUMP_CROSS_JUMP, JUMP_NOOP_MOVES,
3609 !JUMP_AFTER_REGSCAN);
3611 /* CFG no longer kept up to date. */
3613 close_dump_file (DFI_jump2, print_rtl_with_bb, insns);
3614 timevar_pop (TV_JUMP);
3617 /* If a machine dependent reorganization is needed, call it. */
3618 #ifdef MACHINE_DEPENDENT_REORG
3619 open_dump_file (DFI_mach, decl);
3621 MACHINE_DEPENDENT_REORG (insns);
3623 close_dump_file (DFI_mach, print_rtl_with_bb, insns);
3628 /* If a scheduling pass for delayed branches is to be done,
3629 call the scheduling code. */
3632 if (optimize > 0 && flag_delayed_branch)
3634 timevar_push (TV_DBR_SCHED);
3635 open_dump_file (DFI_dbr, decl);
3637 dbr_schedule (insns, rtl_dump_file);
3639 close_dump_file (DFI_dbr, print_rtl_with_bb, insns);
3640 timevar_pop (TV_DBR_SCHED);
3646 /* Shorten branches.
3648 Note this must run before reg-stack because of death note (ab)use
3649 in the ia32 backend. */
3650 timevar_push (TV_SHORTEN_BRANCH);
3651 shorten_branches (get_insns ());
3652 timevar_pop (TV_SHORTEN_BRANCH);
3655 timevar_push (TV_REG_STACK);
3656 open_dump_file (DFI_stack, decl);
3658 reg_to_stack (insns, rtl_dump_file);
3660 close_dump_file (DFI_stack, print_rtl_with_bb, insns);
3661 timevar_pop (TV_REG_STACK);
3666 current_function_nothrow = nothrow_function_p ();
3667 if (current_function_nothrow)
3668 /* Now we know that this can't throw; set the flag for the benefit
3669 of other functions later in this translation unit. */
3670 TREE_NOTHROW (current_function_decl) = 1;
3672 /* Now turn the rtl into assembler code. */
3674 timevar_push (TV_FINAL);
3679 /* Get the function's name, as described by its RTL. This may be
3680 different from the DECL_NAME name used in the source file. */
3682 x = DECL_RTL (decl);
3683 if (GET_CODE (x) != MEM)
3686 if (GET_CODE (x) != SYMBOL_REF)
3688 fnname = XSTR (x, 0);
3690 assemble_start_function (decl, fnname);
3691 final_start_function (insns, asm_out_file, optimize);
3692 final (insns, asm_out_file, optimize, 0);
3693 final_end_function (insns, asm_out_file, optimize);
3694 assemble_end_function (decl, fnname);
3696 fflush (asm_out_file);
3698 /* Release all memory allocated by flow. */
3699 free_basic_block_vars (0);
3701 /* Release all memory held by regsets now. */
3702 regset_release_memory ();
3704 timevar_pop (TV_FINAL);
3708 /* Write DBX symbols if requested. */
3710 /* Note that for those inline functions where we don't initially
3711 know for certain that we will be generating an out-of-line copy,
3712 the first invocation of this routine (rest_of_compilation) will
3713 skip over this code by doing a `goto exit_rest_of_compilation;'.
3714 Later on, finish_compilation will call rest_of_compilation again
3715 for those inline functions that need to have out-of-line copies
3716 generated. During that call, we *will* be routed past here. */
3718 timevar_push (TV_SYMOUT);
3719 #ifdef DBX_DEBUGGING_INFO
3720 if (write_symbols == DBX_DEBUG)
3721 dbxout_function (decl);
3724 #ifdef DWARF_DEBUGGING_INFO
3725 if (write_symbols == DWARF_DEBUG)
3726 dwarfout_file_scope_decl (decl, 0);
3729 #ifdef DWARF2_DEBUGGING_INFO
3730 if (write_symbols == DWARF2_DEBUG)
3731 dwarf2out_decl (decl);
3733 timevar_pop (TV_SYMOUT);
3735 exit_rest_of_compilation:
3737 /* In case the function was not output,
3738 don't leave any temporary anonymous types
3739 queued up for sdb output. */
3740 #ifdef SDB_DEBUGGING_INFO
3741 if (write_symbols == SDB_DEBUG)
3742 sdbout_types (NULL_TREE);
3745 reload_completed = 0;
3746 flow2_completed = 0;
3749 timevar_push (TV_FINAL);
3751 /* Clear out the insn_length contents now that they are no
3753 init_insn_lengths ();
3755 /* Clear out the real_constant_chain before some of the rtx's
3756 it runs through become garbage. */
3757 clear_const_double_mem ();
3759 /* Show no temporary slots allocated. */
3762 free_basic_block_vars (0);
3764 timevar_pop (TV_FINAL);
3766 /* Make sure volatile mem refs aren't considered valid operands for
3767 arithmetic insns. We must call this here if this is a nested inline
3768 function, since the above code leaves us in the init_recog state
3769 (from final.c), and the function context push/pop code does not
3770 save/restore volatile_ok.
3772 ??? Maybe it isn't necessary for expand_start_function to call this
3773 anymore if we do it here? */
3775 init_recog_no_volatile ();
3777 /* We're done with this function. Free up memory if we can. */
3778 free_after_parsing (cfun);
3779 if (! DECL_DEFER_OUTPUT (decl))
3780 free_after_compilation (cfun);
3785 timevar_pop (TV_REST_OF_COMPILATION);
3795 printf (_(" -ffixed-<register> Mark <register> as being unavailable to the compiler\n"));
3796 printf (_(" -fcall-used-<register> Mark <register> as being corrupted by function calls\n"));
3797 printf (_(" -fcall-saved-<register> Mark <register> as being preserved across functions\n"));
3798 printf (_(" -finline-limit=<number> Limits the size of inlined functions to <number>\n"));
3799 printf (_(" -fmessage-length=<number> Limits diagnostics messages lengths to <number> characters per line. 0 suppresses line-wrapping\n"));
3800 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"));
3802 for (i = ARRAY_SIZE (f_options); i--;)
3804 const char *description = f_options[i].description;
3806 if (description != NULL && * description != 0)
3807 printf (" -f%-21s %s\n",
3808 f_options[i].string, description);
3811 printf (_(" -O[number] Set optimisation level to [number]\n"));
3812 printf (_(" -Os Optimise for space rather than speed\n"));
3813 printf (_(" -pedantic Issue warnings needed by strict compliance to ISO C\n"));
3814 printf (_(" -pedantic-errors Like -pedantic except that errors are produced\n"));
3815 printf (_(" -w Suppress warnings\n"));
3816 printf (_(" -W Enable extra warnings\n"));
3818 for (i = ARRAY_SIZE (W_options); i--;)
3820 const char *description = W_options[i].description;
3822 if (description != NULL && * description != 0)
3823 printf (" -W%-21s %s\n",
3824 W_options[i].string, description);
3827 printf (_(" -Wunused Enable unused warnings\n"));
3828 printf (_(" -Wid-clash-<num> Warn if 2 identifiers have the same first <num> chars\n"));
3829 printf (_(" -Wlarger-than-<number> Warn if an object is larger than <number> bytes\n"));
3830 printf (_(" -p Enable function profiling\n"));
3831 #if defined (BLOCK_PROFILER) || defined (FUNCTION_BLOCK_PROFILER)
3832 printf (_(" -a Enable block profiling \n"));
3834 #if defined (BLOCK_PROFILER) || defined (FUNCTION_BLOCK_PROFILER) || defined FUNCTION_BLOCK_PROFILER_EXIT
3835 printf (_(" -ax Enable jump profiling \n"));
3837 printf (_(" -o <file> Place output into <file> \n"));
3839 -G <number> Put global and static data smaller than <number>\n\
3840 bytes into a special section (on some targets)\n"));
3842 for (i = ARRAY_SIZE (debug_args); i--;)
3844 if (debug_args[i].description != NULL)
3845 printf (" -g%-21s %s\n",
3846 debug_args[i].arg, debug_args[i].description);
3849 printf (_(" -aux-info <file> Emit declaration info into <file>.X\n"));
3850 printf (_(" -quiet Do not display functions compiled or elapsed time\n"));
3851 printf (_(" -version Display the compiler's version\n"));
3852 printf (_(" -d[letters] Enable dumps from specific passes of the compiler\n"));
3853 printf (_(" -dumpbase <file> Base name to be used for dumps from specific passes\n"));
3854 #if defined INSN_SCHEDULING
3855 printf (_(" -fsched-verbose=<number> Set the verbosity level of the scheduler\n"));
3857 printf (_(" --help Display this information\n"));
3862 /* Display descriptions of language specific options.
3863 If there is no description, note that there is an undocumented option.
3864 If the description is empty, do not display anything. (This allows
3865 options to be deliberately undocumented, for whatever reason).
3866 If the option string is missing, then this is a marker, indicating
3867 that the description string is in fact the name of a language, whose
3868 language specific options are to follow. */
3870 if (ARRAY_SIZE (documented_lang_options) > 1)
3872 printf (_("\nLanguage specific options:\n"));
3874 for (i = 0; i < ARRAY_SIZE (documented_lang_options); i++)
3876 const char *description = documented_lang_options[i].description;
3877 const char *option = documented_lang_options[i].option;
3879 if (description == NULL)
3884 printf (_(" %-23.23s [undocumented]\n"), option);
3886 else if (*description == 0)
3888 else if (option == NULL)
3892 (_("\nThere are undocumented %s specific options as well.\n"),
3896 printf (_("\n Options for %s:\n"), description);
3901 printf (" %-23.23s %s\n", option, description);
3906 printf (_("\nThere are undocumented %s specific options as well.\n"),
3909 display_target_options ();
3913 display_target_options ()
3917 if (ARRAY_SIZE (target_switches) > 1
3918 #ifdef TARGET_OPTIONS
3919 || ARRAY_SIZE (target_options) > 1
3927 printf (_("\nTarget specific options:\n"));
3929 for (i = ARRAY_SIZE (target_switches); i--;)
3931 const char *option = target_switches[i].name;
3932 const char *description = target_switches[i].description;
3934 if (option == NULL || *option == 0)
3936 else if (description == NULL)
3941 printf (_(" -m%-23.23s [undocumented]\n"), option);
3943 else if (* description != 0)
3944 doc += printf (" -m%-23.23s %s\n", option, description);
3947 #ifdef TARGET_OPTIONS
3948 for (i = ARRAY_SIZE (target_options); i--;)
3950 const char *option = target_options[i].prefix;
3951 const char *description = target_options[i].description;
3953 if (option == NULL || *option == 0)
3955 else if (description == NULL)
3960 printf (_(" -m%-23.23s [undocumented]\n"), option);
3962 else if (* description != 0)
3963 doc += printf (" -m%-23.23s %s\n", option, description);
3969 printf (_("\nThere are undocumented target specific options as well.\n"));
3971 printf (_(" They exist, but they are not documented.\n"));
3976 /* Parse a -d... comand line switch. */
3979 decode_d_option (arg)
3988 for (i = 0; i < DFI_MAX; ++i)
3989 dump_file[i].enabled = 1;
3998 flag_print_asm_name = 1;
4001 flag_dump_rtl_in_asm = 1;
4002 flag_print_asm_name = 1;
4005 graph_dump_format = vcg;
4008 rtl_dump_and_exit = 1;
4013 case 'D': /* These are handled by the preprocessor. */
4019 for (i = 0; i < DFI_MAX; ++i)
4020 if (c == dump_file[i].debug_switch)
4022 dump_file[i].enabled = 1;
4027 warning ("unrecognized gcc debugging option: %c", c);
4032 /* Parse a -f... comand line switch. ARG is the value after the -f.
4033 It is safe to access 'ARG - 2' to generate the full switch name.
4034 Return the number of strings consumed. */
4037 decode_f_option (arg)
4041 const char *option_value = NULL;
4043 /* Search for the option in the table of binary f options. */
4044 for (j = ARRAY_SIZE (f_options); j--;)
4046 if (!strcmp (arg, f_options[j].string))
4048 *f_options[j].variable = f_options[j].on_value;
4052 if (arg[0] == 'n' && arg[1] == 'o' && arg[2] == '-'
4053 && ! strcmp (arg + 3, f_options[j].string))
4055 *f_options[j].variable = ! f_options[j].on_value;
4060 if ((option_value = skip_leading_substring (arg, "inline-limit-"))
4061 || (option_value = skip_leading_substring (arg, "inline-limit=")))
4063 read_integral_parameter (option_value, arg - 2, inline_max_insns);
4064 #ifdef INSN_SCHEDULING
4065 else if ((option_value = skip_leading_substring (arg, "sched-verbose=")))
4066 fix_sched_param ("verbose", option_value);
4068 else if ((option_value = skip_leading_substring (arg, "fixed-")))
4069 fix_register (option_value, 1, 1);
4070 else if ((option_value = skip_leading_substring (arg, "call-used-")))
4071 fix_register (option_value, 0, 1);
4072 else if ((option_value = skip_leading_substring (arg, "call-saved-")))
4073 fix_register (option_value, 0, 0);
4074 else if ((option_value = skip_leading_substring (arg, "align-loops=")))
4075 align_loops = read_integral_parameter (option_value, arg - 2, align_loops);
4076 else if ((option_value = skip_leading_substring (arg, "align-functions=")))
4078 = read_integral_parameter (option_value, arg - 2, align_functions);
4079 else if ((option_value = skip_leading_substring (arg, "align-jumps=")))
4080 align_jumps = read_integral_parameter (option_value, arg - 2, align_jumps);
4081 else if ((option_value = skip_leading_substring (arg, "align-labels=")))
4083 = read_integral_parameter (option_value, arg - 2, align_labels);
4084 else if ((option_value
4085 = skip_leading_substring (arg, "stack-limit-register=")))
4087 int reg = decode_reg_name (option_value);
4089 error ("unrecognized register name `%s'", option_value);
4091 stack_limit_rtx = gen_rtx_REG (Pmode, reg);
4093 else if ((option_value
4094 = skip_leading_substring (arg, "stack-limit-symbol=")))
4097 nm = ggc_strdup (option_value);
4098 stack_limit_rtx = gen_rtx_SYMBOL_REF (Pmode, nm);
4100 else if ((option_value
4101 = skip_leading_substring (arg, "message-length=")))
4102 diagnostic_message_length_per_line =
4103 read_integral_parameter (option_value, arg - 2,
4104 diagnostic_message_length_per_line);
4105 else if ((option_value
4106 = skip_leading_substring (arg, "diagnostics-show-location=")))
4108 if (!strcmp (option_value, "once"))
4109 set_message_prefixing_rule (DIAGNOSTICS_SHOW_PREFIX_ONCE);
4110 else if (!strcmp (option_value, "every-line"))
4111 set_message_prefixing_rule (DIAGNOSTICS_SHOW_PREFIX_EVERY_LINE);
4113 error ("Unrecognized option `%s'", arg - 2);
4115 else if (!strcmp (arg, "no-stack-limit"))
4116 stack_limit_rtx = NULL_RTX;
4117 else if (!strcmp (arg, "preprocessed"))
4118 /* Recognise this switch but do nothing. This prevents warnings
4119 about an unrecognized switch if cpplib has not been linked in. */
4127 /* Parse a -W... comand line switch. ARG is the value after the -W.
4128 It is safe to access 'ARG - 2' to generate the full switch name.
4129 Return the number of strings consumed. */
4132 decode_W_option (arg)
4135 const char *option_value = NULL;
4138 /* Search for the option in the table of binary W options. */
4140 for (j = ARRAY_SIZE (W_options); j--;)
4142 if (!strcmp (arg, W_options[j].string))
4144 *W_options[j].variable = W_options[j].on_value;
4148 if (arg[0] == 'n' && arg[1] == 'o' && arg[2] == '-'
4149 && ! strcmp (arg + 3, W_options[j].string))
4151 *W_options[j].variable = ! W_options[j].on_value;
4156 if ((option_value = skip_leading_substring (arg, "id-clash-")))
4158 id_clash_len = read_integral_parameter (option_value, arg - 2, -1);
4160 if (id_clash_len != -1)
4163 else if ((option_value = skip_leading_substring (arg, "larger-than-")))
4165 larger_than_size = read_integral_parameter (option_value, arg - 2, -1);
4167 if (larger_than_size != -1)
4168 warn_larger_than = 1;
4170 else if (!strcmp (arg, "unused"))
4174 else if (!strcmp (arg, "no-unused"))
4184 /* Parse a -g... comand line switch. ARG is the value after the -g.
4185 It is safe to access 'ARG - 2' to generate the full switch name.
4186 Return the number of strings consumed. */
4189 decode_g_option (arg)
4193 /* A lot of code assumes write_symbols == NO_DEBUG if the
4194 debugging level is 0 (thus -gstabs1 -gstabs0 would lose track
4195 of what debugging type has been selected). This records the
4196 selected type. It is an error to specify more than one
4198 static enum debug_info_type selected_debug_type = NO_DEBUG;
4199 /* Non-zero if debugging format has been explicitly set.
4200 -g and -ggdb don't explicitly set the debugging format so
4201 -gdwarf -g3 is equivalent to -gdwarf3. */
4202 static int type_explicitly_set_p = 0;
4203 /* Indexed by enum debug_info_type. */
4204 static const char *debug_type_names[] =
4206 "none", "stabs", "coff", "dwarf-1", "dwarf-2", "xcoff"
4209 /* The maximum admissible debug level value. */
4210 static const unsigned max_debug_level = 3;
4212 /* Look up ARG in the table. */
4213 for (da = debug_args; da->arg; da++)
4215 const int da_len = strlen (da->arg);
4217 if (da_len == 0 || ! strncmp (arg, da->arg, da_len))
4219 enum debug_info_type type = da->debug_type;
4220 const char *p = arg + da_len;
4222 if (*p && (*p < '0' || *p > '9'))
4225 /* A debug flag without a level defaults to level 2.
4226 Note we do not want to call read_integral_parameter
4227 for that case since it will call atoi which
4230 ??? We may want to generalize the interface to
4231 read_integral_parameter to better handle this case
4232 if this case shows up often. */
4234 level = read_integral_parameter (p, 0, max_debug_level + 1);
4238 if (da_len > 1 && *p && !strncmp (arg, "dwarf", da_len))
4240 error ("use -gdwarf -g%d for DWARF v1, level %d",
4243 error ("use -gdwarf-2 for DWARF v2");
4246 if (level > max_debug_level)
4249 ignoring option `%s' due to invalid debug level specification",
4251 level = debug_info_level;
4254 if (type == NO_DEBUG)
4256 type = PREFERRED_DEBUGGING_TYPE;
4258 if (da_len > 1 && strncmp (arg, "gdb", da_len) == 0)
4260 #if defined (DWARF2_DEBUGGING_INFO) && !defined (LINKER_DOES_NOT_WORK_WITH_DWARF2)
4261 type = DWARF2_DEBUG;
4263 #ifdef DBX_DEBUGGING_INFO
4270 if (type == NO_DEBUG)
4271 warning ("`%s': unknown or unsupported -g option", arg - 2);
4273 /* Does it conflict with an already selected type? */
4274 if (type_explicitly_set_p
4275 /* -g/-ggdb don't conflict with anything. */
4276 && da->debug_type != NO_DEBUG
4277 && type != selected_debug_type)
4278 warning ("`%s' ignored, conflicts with `-g%s'",
4279 arg - 2, debug_type_names[(int) selected_debug_type]);
4282 /* If the format has already been set, -g/-ggdb
4283 only change the debug level. */
4284 if (type_explicitly_set_p && da->debug_type == NO_DEBUG)
4285 /* Don't change debugging type. */
4289 selected_debug_type = type;
4290 type_explicitly_set_p = da->debug_type != NO_DEBUG;
4293 write_symbols = (level == 0
4295 : selected_debug_type);
4296 use_gnu_debug_info_extensions = da->use_extensions_p;
4297 debug_info_level = (enum debug_info_level) level;
4310 /* Decode the first argument in the argv as a language-independent option.
4311 Return the number of strings consumed. */
4314 independent_decode_option (argc, argv)
4318 char *arg = argv[0];
4320 if (arg[0] != '-' || arg[1] == 0)
4332 if (!strcmp (arg, "-help"))
4338 if (!strcmp (arg, "-target-help"))
4340 display_target_options ();
4353 /* Already been treated in main (). Do nothing. */
4357 set_target_switch (arg + 1);
4361 return decode_f_option (arg + 1);
4364 return decode_g_option (arg + 1);
4367 if (!strcmp (arg, "dumpbase"))
4372 dump_base_name = argv[1];
4376 decode_d_option (arg + 1);
4380 if (!strcmp (arg, "pedantic"))
4382 else if (!strcmp (arg, "pedantic-errors"))
4383 flag_pedantic_errors = pedantic = 1;
4384 else if (arg[1] == 0)
4391 if (!strcmp (arg, "quiet"))
4398 if (!strcmp (arg, "version"))
4406 inhibit_warnings = 1;
4415 /* We save the value of warn_uninitialized, since if they put
4416 -Wuninitialized on the command line, we need to generate a
4417 warning about not using it without also specifying -O. */
4418 if (warn_uninitialized != 1)
4419 warn_uninitialized = 2;
4422 return decode_W_option (arg + 1);
4428 #if !defined (BLOCK_PROFILER) || !defined (FUNCTION_BLOCK_PROFILER)
4429 warning ("`-a' option (basic block profile) not supported");
4431 profile_block_flag = (profile_block_flag < 2) ? 1 : 3;
4434 else if (!strcmp (arg, "ax"))
4436 #if !defined (FUNCTION_BLOCK_PROFILER_EXIT) || !defined (BLOCK_PROFILER) || !defined (FUNCTION_BLOCK_PROFILER)
4437 warning ("`-ax' option (jump profiling) not supported");
4439 profile_block_flag = (!profile_block_flag
4440 || profile_block_flag == 2) ? 2 : 3;
4443 else if (!strncmp (arg, "aux-info", 8))
4445 flag_gen_aux_info = 1;
4451 aux_info_file_name = argv[1];
4455 aux_info_file_name = arg + 8;
4467 asm_file_name = argv[1];
4482 g_switch_val = read_integral_parameter (argv[1], 0, -1);
4487 g_switch_val = read_integral_parameter (arg + 1, 0, -1);
4491 if (g_switch_val == -1)
4495 g_switch_set = TRUE;
4496 g_switch_value = g_switch_val;
4506 /* Entry point of cc1/c++. Decode command args, then call compile_file.
4507 Exit code is 35 if can't open files, 34 if fatal error,
4508 33 if had nonfatal errors, else success. */
4510 extern int main PARAMS ((int, char **));
4520 /* save in case md file wants to emit args as a comment. */
4524 p = argv[0] + strlen (argv[0]);
4525 while (p != argv[0] && !IS_DIR_SEPARATOR (p[-1]))
4529 #ifdef HAVE_LC_MESSAGES
4530 setlocale (LC_MESSAGES, "");
4532 (void) bindtextdomain (PACKAGE, localedir);
4533 (void) textdomain (PACKAGE);
4535 /* Install handler for SIGFPE, which may be received while we do
4536 compile-time floating point arithmetic. */
4537 signal (SIGFPE, float_signal);
4539 /* Trap fatal signals, e.g. SIGSEGV, and convert them to ICE messages. */
4541 signal (SIGSEGV, crash_signal);
4544 signal (SIGILL, crash_signal);
4547 signal (SIGBUS, crash_signal);
4550 signal (SIGABRT, crash_signal);
4552 #if defined SIGIOT && (!defined SIGABRT || SIGABRT != SIGIOT)
4553 signal (SIGIOT, crash_signal);
4556 decl_printable_name = decl_name;
4557 lang_expand_expr = (lang_expand_expr_t) do_abort;
4559 /* Initialize whether `char' is signed. */
4560 flag_signed_char = DEFAULT_SIGNED_CHAR;
4561 #ifdef DEFAULT_SHORT_ENUMS
4562 /* Initialize how much space enums occupy, by default. */
4563 flag_short_enums = DEFAULT_SHORT_ENUMS;
4566 /* Initialize the garbage-collector. */
4569 ggc_add_rtx_root (&stack_limit_rtx, 1);
4570 ggc_add_tree_root (¤t_function_decl, 1);
4571 ggc_add_tree_root (¤t_function_func_begin_label, 1);
4573 /* Initialize the diagnostics reporting machinery. */
4574 initialize_diagnostics ();
4576 /* Perform language-specific options intialization. */
4577 lang_init_options ();
4579 /* Scan to see what optimization level has been specified. That will
4580 determine the default value of many flags. */
4581 for (i = 1; i < argc; i++)
4583 if (!strcmp (argv[i], "-O"))
4588 else if (argv[i][0] == '-' && argv[i][1] == 'O')
4590 /* Handle -Os, -O2, -O3, -O69, ... */
4591 char *p = &argv[i][2];
4593 if ((p[0] == 's') && (p[1] == 0))
4597 /* Optimizing for size forces optimize to be 2. */
4602 const int optimize_val = read_integral_parameter (p, p - 2, -1);
4603 if (optimize_val != -1)
4605 optimize = optimize_val;
4615 flag_thread_jumps = 1;
4617 flag_delayed_branch = 1;
4619 #ifdef CAN_DEBUG_WITHOUT_FP
4620 flag_omit_frame_pointer = 1;
4626 flag_optimize_sibling_calls = 1;
4627 flag_cse_follow_jumps = 1;
4628 flag_cse_skip_blocks = 1;
4630 flag_expensive_optimizations = 1;
4631 flag_strength_reduce = 1;
4632 flag_rerun_cse_after_loop = 1;
4633 flag_rerun_loop_opt = 1;
4634 flag_caller_saves = 1;
4637 #ifdef INSN_SCHEDULING
4638 flag_schedule_insns = 1;
4639 flag_schedule_insns_after_reload = 1;
4642 flag_strict_aliasing = 1;
4643 flag_delete_null_pointer_checks = 1;
4644 flag_reorder_blocks = 1;
4649 flag_inline_functions = 1;
4650 flag_rename_registers = 1;
4653 if (optimize < 2 || optimize_size)
4658 align_functions = 1;
4661 /* Initialize target_flags before OPTIMIZATION_OPTIONS so the latter can
4664 set_target_switch ("");
4666 /* Unwind tables are always present in an ABI-conformant IA-64
4667 object file, so the default should be ON. */
4668 #ifdef IA64_UNWIND_INFO
4669 flag_unwind_tables = IA64_UNWIND_INFO;
4672 #ifdef OPTIMIZATION_OPTIONS
4673 /* Allow default optimizations to be specified on a per-machine basis. */
4674 OPTIMIZATION_OPTIONS (optimize, optimize_size);
4677 /* Initialize register usage now so switches may override. */
4680 /* Perform normal command line switch decoding. */
4681 for (i = 1; i < argc;)
4683 unsigned int lang_processed;
4684 unsigned int indep_processed;
4686 /* Give the language a chance to decode the option for itself. */
4687 lang_processed = lang_decode_option (argc - i, argv + i);
4689 /* Now see if the option also has a language independent meaning.
4690 Some options are both language specific and language independent,
4692 indep_processed = independent_decode_option (argc - i, argv + i);
4694 if (lang_processed || indep_processed)
4695 i += MAX (lang_processed, indep_processed);
4698 const char *option = NULL;
4699 const char *lang = NULL;
4702 /* It is possible that the command line switch is not valid for the
4703 current language, but it is valid for another language. In order
4704 to be compatible with previous versions of the compiler (which
4705 did not issue an error message in this case) we check for this
4706 possibility here. If we do find a match, then if extra_warnings
4707 is set we generate a warning message, otherwise we will just
4708 ignore the option. */
4709 for (j = 0; j < ARRAY_SIZE (documented_lang_options); j++)
4711 option = documented_lang_options[j].option;
4714 lang = documented_lang_options[j].description;
4715 else if (! strncmp (argv[i], option, strlen (option)))
4719 if (j != ARRAY_SIZE (documented_lang_options))
4723 warning ("Ignoring command line option '%s'", argv[i]);
4726 ("(It is valid for %s but not the selected language)",
4730 else if (argv[i][0] == '-' && argv[i][1] == 'g')
4731 warning ("`%s': unknown or unsupported -g option", &argv[i][2]);
4733 error ("Unrecognized option `%s'", argv[i]);
4739 /* Reflect any language-specific diagnostic option setting. */
4740 reshape_diagnostic_buffer ();
4742 /* Checker uses the frame pointer. */
4743 if (flag_check_memory_usage)
4744 flag_omit_frame_pointer = 0;
4748 /* Inlining does not work if not optimizing,
4749 so force it not to be done. */
4753 /* The c_decode_option and lang_decode_option functions set
4754 this to `2' if -Wall is used, so we can avoid giving out
4755 lots of errors for people who don't realize what -Wall does. */
4756 if (warn_uninitialized == 1)
4757 warning ("-Wuninitialized is not supported without -O");
4760 #ifdef OVERRIDE_OPTIONS
4761 /* Some machines may reject certain combinations of options. */
4765 if (exceptions_via_longjmp == 2)
4767 #ifdef DWARF2_UNWIND_INFO
4768 exceptions_via_longjmp = ! DWARF2_UNWIND_INFO;
4770 #ifdef IA64_UNWIND_INFO
4771 exceptions_via_longjmp = ! IA64_UNWIND_INFO;
4773 exceptions_via_longjmp = 1;
4778 /* Since each function gets its own handler data, we can't support the
4779 new model currently, since it depend on a specific rethrow label
4780 which is declared at the front of the table, and we can only
4781 have one such symbol in a file. */
4782 #ifdef IA64_UNWIND_INFO
4783 flag_new_exceptions = 0;
4786 /* Set up the align_*_log variables, defaulting them to 1 if they
4787 were still unset. */
4788 if (align_loops <= 0) align_loops = 1;
4789 align_loops_log = floor_log2 (align_loops * 2 - 1);
4790 if (align_jumps <= 0) align_jumps = 1;
4791 align_jumps_log = floor_log2 (align_jumps * 2 - 1);
4792 if (align_labels <= 0) align_labels = 1;
4793 align_labels_log = floor_log2 (align_labels * 2 - 1);
4794 if (align_functions <= 0) align_functions = 1;
4795 align_functions_log = floor_log2 (align_functions * 2 - 1);
4797 if (profile_block_flag == 3)
4799 warning ("`-ax' and `-a' are conflicting options. `-a' ignored.");
4800 profile_block_flag = 2;
4803 /* Unrolling all loops implies that standard loop unrolling must also
4805 if (flag_unroll_all_loops)
4806 flag_unroll_loops = 1;
4807 /* Loop unrolling requires that strength_reduction be on also. Silently
4808 turn on strength reduction here if it isn't already on. Also, the loop
4809 unrolling code assumes that cse will be run after loop, so that must
4810 be turned on also. */
4811 if (flag_unroll_loops)
4813 flag_strength_reduce = 1;
4814 flag_rerun_cse_after_loop = 1;
4817 /* Warn about options that are not supported on this machine. */
4818 #ifndef INSN_SCHEDULING
4819 if (flag_schedule_insns || flag_schedule_insns_after_reload)
4820 warning ("instruction scheduling not supported on this target machine");
4823 if (flag_delayed_branch)
4824 warning ("this target machine does not have delayed branches");
4827 user_label_prefix = USER_LABEL_PREFIX;
4828 if (flag_leading_underscore != -1)
4830 /* If the default prefix is more complicated than "" or "_",
4831 issue a warning and ignore this option. */
4832 if (user_label_prefix[0] == 0 ||
4833 (user_label_prefix[0] == '_' && user_label_prefix[1] == 0))
4835 user_label_prefix = flag_leading_underscore ? "_" : "";
4838 warning ("-f%sleading-underscore not supported on this target machine",
4839 flag_leading_underscore ? "" : "no-");
4842 /* If we are in verbose mode, write out the version and maybe all the
4843 option flags in use. */
4846 print_version (stderr, "");
4848 print_switch_values (stderr, 0, MAX_LINE, "", " ", "\n");
4851 compile_file (filename);
4853 #if !defined(OS2) && !defined(VMS) && (!defined(_WIN32) || defined (__CYGWIN__)) && !defined(__INTERIX)
4856 char *lim = (char *) sbrk (0);
4858 fnotice (stderr, "Data size %ld.\n", (long) (lim - (char *) &environ));
4863 system ("ps -l 1>&2");
4866 #endif /* not USG */
4869 #endif /* ! OS2 && ! VMS && (! _WIN32 || CYGWIN) && ! __INTERIX */
4872 return (FATAL_EXIT_CODE);
4874 return (FATAL_EXIT_CODE);
4875 return (SUCCESS_EXIT_CODE);
4878 /* Decode -m switches. */
4879 /* Decode the switch -mNAME. */
4882 set_target_switch (name)
4886 int valid_target_option = 0;
4888 for (j = 0; j < ARRAY_SIZE (target_switches); j++)
4889 if (!strcmp (target_switches[j].name, name))
4891 if (target_switches[j].value < 0)
4892 target_flags &= ~-target_switches[j].value;
4894 target_flags |= target_switches[j].value;
4895 valid_target_option = 1;
4898 #ifdef TARGET_OPTIONS
4899 if (!valid_target_option)
4900 for (j = 0; j < ARRAY_SIZE (target_options); j++)
4902 int len = strlen (target_options[j].prefix);
4903 if (!strncmp (target_options[j].prefix, name, len))
4905 *target_options[j].variable = name + len;
4906 valid_target_option = 1;
4911 if (!valid_target_option)
4912 error ("Invalid option `%s'", name);
4915 /* Print version information to FILE.
4916 Each line begins with INDENT (for the case where FILE is the
4917 assembler output file). */
4920 print_version (file, indent)
4925 #define __VERSION__ "[?]"
4929 "%s%s%s version %s (%s) compiled by GNU C version %s.\n"
4931 "%s%s%s version %s (%s) compiled by CC.\n"
4933 , indent, *indent != 0 ? " " : "",
4934 language_string, version_string, TARGET_NAME, __VERSION__);
4937 /* Print an option value and return the adjusted position in the line.
4938 ??? We don't handle error returns from fprintf (disk full); presumably
4939 other code will catch a disk full though. */
4942 print_single_switch (file, pos, max, indent, sep, term, type, name)
4945 const char *indent, *sep, *term, *type, *name;
4947 /* The ultrix fprintf returns 0 on success, so compute the result we want
4948 here since we need it for the following test. */
4949 int len = strlen (sep) + strlen (type) + strlen (name);
4954 fprintf (file, "%s", term);
4959 fprintf (file, "%s", indent);
4960 pos = strlen (indent);
4962 fprintf (file, "%s%s%s", sep, type, name);
4967 /* Print active target switches to FILE.
4968 POS is the current cursor position and MAX is the size of a "line".
4969 Each line begins with INDENT and ends with TERM.
4970 Each switch is separated from the next by SEP. */
4973 print_switch_values (file, pos, max, indent, sep, term)
4976 const char *indent, *sep, *term;
4981 /* Print the options as passed. */
4983 pos = print_single_switch (file, pos, max, indent, *indent ? " " : "", term,
4984 _("options passed: "), "");
4986 for (p = &save_argv[1]; *p != NULL; p++)
4990 if (strcmp (*p, "-o") == 0)
4996 if (strcmp (*p, "-quiet") == 0)
4998 if (strcmp (*p, "-version") == 0)
5003 pos = print_single_switch (file, pos, max, indent, sep, term, *p, "");
5006 fprintf (file, "%s", term);
5008 /* Print the -f and -m options that have been enabled.
5009 We don't handle language specific options but printing argv
5012 pos = print_single_switch (file, 0, max, indent, *indent ? " " : "", term,
5013 _("options enabled: "), "");
5015 for (j = 0; j < ARRAY_SIZE (f_options); j++)
5016 if (*f_options[j].variable == f_options[j].on_value)
5017 pos = print_single_switch (file, pos, max, indent, sep, term,
5018 "-f", f_options[j].string);
5020 /* Print target specific options. */
5022 for (j = 0; j < ARRAY_SIZE (target_switches); j++)
5023 if (target_switches[j].name[0] != '\0'
5024 && target_switches[j].value > 0
5025 && ((target_switches[j].value & target_flags)
5026 == target_switches[j].value))
5028 pos = print_single_switch (file, pos, max, indent, sep, term,
5029 "-m", target_switches[j].name);
5032 #ifdef TARGET_OPTIONS
5033 for (j = 0; j < ARRAY_SIZE (target_options); j++)
5034 if (*target_options[j].variable != NULL)
5037 sprintf (prefix, "-m%s", target_options[j].prefix);
5038 pos = print_single_switch (file, pos, max, indent, sep, term,
5039 prefix, *target_options[j].variable);
5043 fprintf (file, "%s", term);
5046 /* Record the beginning of a new source file, named FILENAME. */
5049 debug_start_source_file (filename)
5050 register const char *filename ATTRIBUTE_UNUSED;
5052 #ifdef DBX_DEBUGGING_INFO
5053 if (write_symbols == DBX_DEBUG)
5054 dbxout_start_new_source_file (filename);
5056 #ifdef DWARF_DEBUGGING_INFO
5057 if (debug_info_level == DINFO_LEVEL_VERBOSE
5058 && write_symbols == DWARF_DEBUG)
5059 dwarfout_start_new_source_file (filename);
5060 #endif /* DWARF_DEBUGGING_INFO */
5061 #ifdef DWARF2_DEBUGGING_INFO
5062 if (write_symbols == DWARF2_DEBUG)
5063 dwarf2out_start_source_file (filename);
5064 #endif /* DWARF2_DEBUGGING_INFO */
5065 #ifdef SDB_DEBUGGING_INFO
5066 if (write_symbols == SDB_DEBUG)
5067 sdbout_start_new_source_file (filename);
5071 /* Record the resumption of a source file. LINENO is the line number in
5072 the source file we are returning to. */
5075 debug_end_source_file (lineno)
5076 register unsigned lineno ATTRIBUTE_UNUSED;
5078 #ifdef DBX_DEBUGGING_INFO
5079 if (write_symbols == DBX_DEBUG)
5080 dbxout_resume_previous_source_file ();
5082 #ifdef DWARF_DEBUGGING_INFO
5083 if (debug_info_level == DINFO_LEVEL_VERBOSE
5084 && write_symbols == DWARF_DEBUG)
5085 dwarfout_resume_previous_source_file (lineno);
5086 #endif /* DWARF_DEBUGGING_INFO */
5087 #ifdef DWARF2_DEBUGGING_INFO
5088 if (write_symbols == DWARF2_DEBUG)
5089 dwarf2out_end_source_file ();
5090 #endif /* DWARF2_DEBUGGING_INFO */
5091 #ifdef SDB_DEBUGGING_INFO
5092 if (write_symbols == SDB_DEBUG)
5093 sdbout_resume_previous_source_file ();
5097 /* Called from check_newline in c-parse.y. The `buffer' parameter contains
5098 the tail part of the directive line, i.e. the part which is past the
5099 initial whitespace, #, whitespace, directive-name, whitespace part. */
5102 debug_define (lineno, buffer)
5103 register unsigned lineno ATTRIBUTE_UNUSED;
5104 register char *buffer ATTRIBUTE_UNUSED;
5106 #ifdef DWARF_DEBUGGING_INFO
5107 if (debug_info_level == DINFO_LEVEL_VERBOSE
5108 && write_symbols == DWARF_DEBUG)
5109 dwarfout_define (lineno, buffer);
5110 #endif /* DWARF_DEBUGGING_INFO */
5111 #ifdef DWARF2_DEBUGGING_INFO
5112 if (debug_info_level == DINFO_LEVEL_VERBOSE
5113 && write_symbols == DWARF2_DEBUG)
5114 dwarf2out_define (lineno, buffer);
5115 #endif /* DWARF2_DEBUGGING_INFO */
5118 /* Called from check_newline in c-parse.y. The `buffer' parameter contains
5119 the tail part of the directive line, i.e. the part which is past the
5120 initial whitespace, #, whitespace, directive-name, whitespace part. */
5123 debug_undef (lineno, buffer)
5124 register unsigned lineno ATTRIBUTE_UNUSED;
5125 register char *buffer ATTRIBUTE_UNUSED;
5127 #ifdef DWARF_DEBUGGING_INFO
5128 if (debug_info_level == DINFO_LEVEL_VERBOSE
5129 && write_symbols == DWARF_DEBUG)
5130 dwarfout_undef (lineno, buffer);
5131 #endif /* DWARF_DEBUGGING_INFO */
5132 #ifdef DWARF2_DEBUGGING_INFO
5133 if (debug_info_level == DINFO_LEVEL_VERBOSE
5134 && write_symbols == DWARF2_DEBUG)
5135 dwarf2out_undef (lineno, buffer);
5136 #endif /* DWARF2_DEBUGGING_INFO */
5139 /* Returns nonzero if it is appropriate not to emit any debugging
5140 information for BLOCK, because it doesn't contain any instructions.
5141 This may not be the case for blocks containing nested functions, since
5142 we may actually call such a function even though the BLOCK information
5146 debug_ignore_block (block)
5147 tree block ATTRIBUTE_UNUSED;
5149 /* Never delete the BLOCK for the outermost scope
5150 of the function; we can refer to names from
5151 that scope even if the block notes are messed up. */
5152 if (is_body_block (block))
5155 #ifdef DWARF2_DEBUGGING_INFO
5156 if (write_symbols == DWARF2_DEBUG)
5157 return dwarf2out_ignore_block (block);