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 mark_file_stack 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. */
291 /* Describes all the dump files. Should be kept in order of the
292 pass and in sync with dump_file_index above.
294 Remaining -d letters:
300 struct dump_file_info dump_file[DFI_MAX] =
302 { "rtl", 'r', 0, 0, 0 },
303 { "sibling", 'i', 0, 0, 0 },
304 { "jump", 'j', 0, 0, 0 },
305 { "cse", 's', 0, 0, 0 },
306 { "addressof", 'F', 0, 0, 0 },
307 { "ssa", 'e', 1, 0, 0 },
308 { "dce", 'X', 1, 0, 0 },
309 { "ussa", 'e', 1, 0, 0 }, /* Yes, duplicate enable switch. */
310 { "gcse", 'G', 1, 0, 0 },
311 { "loop", 'L', 1, 0, 0 },
312 { "cse2", 't', 1, 0, 0 },
313 { "cfg", 'f', 1, 0, 0 },
314 { "bp", 'b', 1, 0, 0 },
315 { "life", 'f', 1, 0, 0 }, /* Yes, duplicate enable switch. */
316 { "combine", 'c', 1, 0, 0 },
317 { "ce", 'C', 1, 0, 0 },
318 { "regmove", 'N', 1, 0, 0 },
319 { "sched", 'S', 1, 0, 0 },
320 { "lreg", 'l', 1, 0, 0 },
321 { "greg", 'g', 1, 0, 0 },
322 { "flow2", 'w', 1, 0, 0 },
323 { "ce2", 'E', 1, 0, 0 },
324 { "peephole2", 'z', 1, 0, 0 },
325 { "rnreg", 'n', 1, 0, 0 },
326 { "sched2", 'R', 1, 0, 0 },
327 { "bbro", 'B', 1, 0, 0 },
328 { "jump2", 'J', 1, 0, 0 },
329 { "mach", 'M', 1, 0, 0 },
330 { "dbr", 'd', 0, 0, 0 },
331 { "stack", 'k', 1, 0, 0 },
334 static int open_dump_file PARAMS ((enum dump_file_index, tree));
335 static void close_dump_file PARAMS ((enum dump_file_index,
336 void (*) (FILE *, rtx), rtx));
338 /* Other flags saying which kinds of debugging dump have been requested. */
340 int rtl_dump_and_exit;
341 int flag_print_asm_name;
342 static int flag_print_mem;
343 static int version_flag;
344 static char *filename;
345 enum graph_dump_types graph_dump_format;
347 /* Name for output file of assembly code, specified with -o. */
351 /* Value of the -G xx switch, and whether it was passed or not. */
355 /* Type(s) of debugging information we are producing (if any).
356 See flags.h for the definitions of the different possible
357 types of debugging information. */
358 enum debug_info_type write_symbols = NO_DEBUG;
360 /* Level of debugging information we are producing. See flags.h
361 for the definitions of the different possible levels. */
362 enum debug_info_level debug_info_level = DINFO_LEVEL_NONE;
364 /* Nonzero means use GNU-only extensions in the generated symbolic
365 debugging information. */
366 /* Currently, this only has an effect when write_symbols is set to
367 DBX_DEBUG, XCOFF_DEBUG, or DWARF_DEBUG. */
368 int use_gnu_debug_info_extensions = 0;
370 /* Nonzero means do optimizations. -O.
371 Particular numeric values stand for particular amounts of optimization;
372 thus, -O2 stores 2 here. However, the optimizations beyond the basic
373 ones are not controlled directly by this variable. Instead, they are
374 controlled by individual `flag_...' variables that are defaulted
375 based on this variable. */
379 /* Nonzero means optimize for size. -Os.
380 The only valid values are zero and non-zero. When optimize_size is
381 non-zero, optimize defaults to 2, but certain individual code
382 bloating optimizations are disabled. */
384 int optimize_size = 0;
386 /* Number of error messages and warning messages so far. */
389 int warningcount = 0;
392 /* The FUNCTION_DECL for the function currently being compiled,
393 or 0 if between functions. */
394 tree current_function_decl;
396 /* Set to the FUNC_BEGIN label of the current function, or NULL_TREE
398 tree current_function_func_begin_label;
400 /* Pointer to function to compute the name to use to print a declaration.
401 DECL is the declaration in question.
402 VERBOSITY determines what information will be printed:
403 0: DECL_NAME, demangled as necessary.
404 1: and scope information.
405 2: and any other information that might be interesting, such as function
406 parameter types in C++. */
408 const char *(*decl_printable_name) PARAMS ((tree, int));
410 /* Pointer to function to compute rtl for a language-specific tree code. */
412 typedef rtx (*lang_expand_expr_t)
413 PARAMS ((union tree_node *, rtx, enum machine_mode,
414 enum expand_modifier modifier));
416 lang_expand_expr_t lang_expand_expr = 0;
418 tree (*lang_expand_constant) PARAMS ((tree)) = 0;
420 /* Pointer to function to finish handling an incomplete decl at the
421 end of compilation. */
423 void (*incomplete_decl_finalize_hook) PARAMS ((tree)) = 0;
425 /* Nonzero if doing dwarf2 duplicate elimination. */
427 int flag_eliminate_dwarf2_dups = 0;
429 /* Nonzero if generating code to do profiling. */
431 int profile_flag = 0;
433 /* Nonzero if generating code to do profiling on a line-by-line basis. */
435 int profile_block_flag;
437 /* Nonzero if generating code to profile program flow graph arcs. */
439 int profile_arc_flag = 0;
441 /* Nonzero if generating info for gcov to calculate line test coverage. */
443 int flag_test_coverage = 0;
445 /* Nonzero indicates that branch taken probabilities should be calculated. */
447 int flag_branch_probabilities = 0;
449 /* Nonzero if basic blocks should be reordered. */
451 int flag_reorder_blocks = 0;
453 /* Nonzero if registers should be renamed. */
455 int flag_rename_registers = 0;
457 /* Nonzero for -pedantic switch: warn about anything
458 that standard spec forbids. */
462 /* Temporarily suppress certain warnings.
463 This is set while reading code from a system header file. */
465 int in_system_header = 0;
467 /* Don't print functions as they are compiled. -quiet. */
471 /* Print times taken by the various passes. -ftime-report. */
475 /* Print memory still in use at end of compilation (which may have little
476 to do with peak memory consumption). -fmem-report. */
480 /* Non-zero means to collect statistics which might be expensive
481 and to print them when we are done. */
482 int flag_detailed_statistics = 0;
487 /* Nonzero means `char' should be signed. */
489 int flag_signed_char;
491 /* Nonzero means give an enum type only as many bytes as it needs. */
493 int flag_short_enums;
495 /* Nonzero for -fcaller-saves: allocate values in regs that need to
496 be saved across function calls, if that produces overall better code.
497 Optional now, so people can test it. */
499 #ifdef DEFAULT_CALLER_SAVES
500 int flag_caller_saves = 1;
502 int flag_caller_saves = 0;
505 /* Nonzero if structures and unions should be returned in memory.
507 This should only be defined if compatibility with another compiler or
508 with an ABI is needed, because it results in slower code. */
510 #ifndef DEFAULT_PCC_STRUCT_RETURN
511 #define DEFAULT_PCC_STRUCT_RETURN 1
514 /* Nonzero for -fpcc-struct-return: return values the same way PCC does. */
516 int flag_pcc_struct_return = DEFAULT_PCC_STRUCT_RETURN;
518 /* Nonzero for -fforce-mem: load memory value into a register
519 before arithmetic on it. This makes better cse but slower compilation. */
521 int flag_force_mem = 0;
523 /* Nonzero for -fforce-addr: load memory address into a register before
524 reference to memory. This makes better cse but slower compilation. */
526 int flag_force_addr = 0;
528 /* Nonzero for -fdefer-pop: don't pop args after each function call;
529 instead save them up to pop many calls' args with one insns. */
531 int flag_defer_pop = 0;
533 /* Nonzero for -ffloat-store: don't allocate floats and doubles
534 in extended-precision registers. */
536 int flag_float_store = 0;
538 /* Nonzero for -fcse-follow-jumps:
539 have cse follow jumps to do a more extensive job. */
541 int flag_cse_follow_jumps;
543 /* Nonzero for -fcse-skip-blocks:
544 have cse follow a branch around a block. */
545 int flag_cse_skip_blocks;
547 /* Nonzero for -fexpensive-optimizations:
548 perform miscellaneous relatively-expensive optimizations. */
549 int flag_expensive_optimizations;
551 /* Nonzero for -fthread-jumps:
552 have jump optimize output of loop. */
554 int flag_thread_jumps;
556 /* Nonzero enables strength-reduction in loop.c. */
558 int flag_strength_reduce = 0;
560 /* Nonzero enables loop unrolling in unroll.c. Only loops for which the
561 number of iterations can be calculated at compile-time (UNROLL_COMPLETELY,
562 UNROLL_MODULO) or at run-time (preconditioned to be UNROLL_MODULO) are
565 int flag_unroll_loops;
567 /* Nonzero enables loop unrolling in unroll.c. All loops are unrolled.
568 This is generally not a win. */
570 int flag_unroll_all_loops;
572 /* Nonzero forces all invariant computations in loops to be moved
575 int flag_move_all_movables = 0;
577 /* Nonzero forces all general induction variables in loops to be
580 int flag_reduce_all_givs = 0;
582 /* Nonzero to perform full register move optimization passes. This is the
585 int flag_regmove = 0;
587 /* Nonzero for -fwritable-strings:
588 store string constants in data segment and don't uniquize them. */
590 int flag_writable_strings = 0;
592 /* Nonzero means don't put addresses of constant functions in registers.
593 Used for compiling the Unix kernel, where strange substitutions are
594 done on the assembly output. */
596 int flag_no_function_cse = 0;
598 /* Nonzero for -fomit-frame-pointer:
599 don't make a frame pointer in simple functions that don't require one. */
601 int flag_omit_frame_pointer = 0;
603 /* Nonzero means place each function into its own section on those platforms
604 which support arbitrary section names and unlimited numbers of sections. */
606 int flag_function_sections = 0;
608 /* ... and similar for data. */
610 int flag_data_sections = 0;
612 /* Nonzero to inhibit use of define_optimization peephole opts. */
614 int flag_no_peephole = 0;
616 /* Nonzero allows GCC to violate some IEEE or ANSI rules regarding math
617 operations in the interest of optimization. For example it allows
618 GCC to assume arguments to sqrt are nonnegative numbers, allowing
619 faster code for sqrt to be generated. */
621 int flag_fast_math = 0;
623 /* Nonzero allows GCC to optimize sibling and tail recursive calls. */
625 int flag_optimize_sibling_calls = 0;
627 /* Nonzero means the front end generally wants `errno' maintained by math
628 operations, like built-in SQRT, unless overridden by flag_fast_math. */
630 int flag_errno_math = 1;
632 /* 0 means straightforward implementation of complex divide acceptable.
633 1 means wide ranges of inputs must work for complex divide.
634 2 means C9X-like requirements for complex divide (not yet implemented). */
636 int flag_complex_divide_method = 0;
638 /* Nonzero means all references through pointers are volatile. */
642 /* Nonzero means treat all global and extern variables as volatile. */
644 int flag_volatile_global;
646 /* Nonzero means treat all static variables as volatile. */
648 int flag_volatile_static;
650 /* Nonzero means just do syntax checking; don't output anything. */
652 int flag_syntax_only = 0;
654 /* Nonzero means perform global cse. */
656 static int flag_gcse;
658 /* Nonzero means to use global dataflow analysis to eliminate
659 useless null pointer tests. */
661 static int flag_delete_null_pointer_checks;
663 /* Nonzero means to rerun cse after loop optimization. This increases
664 compilation time about 20% and picks up a few more common expressions. */
666 static int flag_rerun_cse_after_loop;
668 /* Nonzero means to run loop optimizations twice. */
670 int flag_rerun_loop_opt;
672 /* Nonzero for -finline-functions: ok to inline functions that look like
673 good inline candidates. */
675 int flag_inline_functions;
677 /* Nonzero for -fkeep-inline-functions: even if we make a function
678 go inline everywhere, keep its definition around for debugging
681 int flag_keep_inline_functions;
683 /* Nonzero means that functions will not be inlined. */
687 /* Nonzero means that we should emit static const variables
688 regardless of whether or not optimization is turned on. */
690 int flag_keep_static_consts = 1;
692 /* Nonzero means we should be saving declaration info into a .X file. */
694 int flag_gen_aux_info = 0;
696 /* Specified name of aux-info file. */
698 static char *aux_info_file_name;
700 /* Nonzero means make the text shared if supported. */
702 int flag_shared_data;
704 /* Nonzero means schedule into delayed branch slots if supported. */
706 int flag_delayed_branch;
708 /* Nonzero if we are compiling pure (sharable) code.
709 Value is 1 if we are doing reasonable (i.e. simple
710 offset into offset table) pic. Value is 2 if we can
711 only perform register offsets. */
715 /* Nonzero means generate extra code for exception handling and enable
716 exception handling. */
720 /* Nonzero means use the new model for exception handling. Replaces
721 -DNEW_EH_MODEL as a compile option. */
723 int flag_new_exceptions = 1;
725 /* Nonzero means generate frame unwind info table when supported. */
727 int flag_unwind_tables = 0;
729 /* Nonzero means don't place uninitialized global data in common storage
734 /* Nonzero means pretend it is OK to examine bits of target floats,
735 even if that isn't true. The resulting code will have incorrect constants,
736 but the same series of instructions that the native compiler would make. */
738 int flag_pretend_float;
740 /* Nonzero means change certain warnings into errors.
741 Usually these are warnings about failure to conform to some standard. */
743 int flag_pedantic_errors = 0;
745 /* flag_schedule_insns means schedule insns within basic blocks (before
747 flag_schedule_insns_after_reload means schedule insns after
750 int flag_schedule_insns = 0;
751 int flag_schedule_insns_after_reload = 0;
753 /* The following flags have effect only for scheduling before register
756 flag_schedule_interblock means schedule insns accross basic blocks.
757 flag_schedule_speculative means allow speculative motion of non-load insns.
758 flag_schedule_speculative_load means allow speculative motion of some
760 flag_schedule_speculative_load_dangerous allows speculative motion of more
763 int flag_schedule_interblock = 1;
764 int flag_schedule_speculative = 1;
765 int flag_schedule_speculative_load = 0;
766 int flag_schedule_speculative_load_dangerous = 0;
768 int flag_single_precision_constant;
770 /* flag_branch_on_count_reg means try to replace add-1,compare,branch tupple
771 by a cheaper branch on a count register. */
772 int flag_branch_on_count_reg = 1;
774 /* -finhibit-size-directive inhibits output of .size for ELF.
775 This is used only for compiling crtstuff.c,
776 and it may be extended to other effects
777 needed for crtstuff.c on other systems. */
778 int flag_inhibit_size_directive = 0;
780 /* -fverbose-asm causes extra commentary information to be produced in
781 the generated assembly code (to make it more readable). This option
782 is generally only of use to those who actually need to read the
783 generated assembly code (perhaps while debugging the compiler itself).
784 -fno-verbose-asm, the default, causes the extra information
785 to be omitted and is useful when comparing two assembler files. */
787 int flag_verbose_asm = 0;
789 /* -dA causes debug commentary information to be produced in
790 the generated assembly code (to make it more readable). This option
791 is generally only of use to those who actually need to read the
792 generated assembly code (perhaps while debugging the compiler itself).
793 Currently, this switch is only used by dwarfout.c; however, it is intended
794 to be a catchall for printing debug information in the assembler file. */
796 int flag_debug_asm = 0;
798 /* -dP causes the rtl to be emitted as a comment in assembly. */
800 int flag_dump_rtl_in_asm = 0;
802 /* -fgnu-linker specifies use of the GNU linker for initializations.
803 (Or, more generally, a linker that handles initializations.)
804 -fno-gnu-linker says that collect2 will be used. */
806 int flag_gnu_linker = 0;
808 int flag_gnu_linker = 1;
814 /* Enable dead code elimination. */
817 /* Tag all structures with __attribute__(packed). */
818 int flag_pack_struct = 0;
820 /* Emit code to check for stack overflow; also may cause large objects
821 to be allocated dynamically. */
822 int flag_stack_check;
824 /* When non-NULL, indicates that whenever space is allocated on the
825 stack, the resulting stack pointer must not pass this
826 address---that is, for stacks that grow downward, the stack pointer
827 must always be greater than or equal to this address; for stacks
828 that grow upward, the stack pointer must be less than this address.
829 At present, the rtx may be either a REG or a SYMBOL_REF, although
830 the support provided depends on the backend. */
833 /* -fcheck-memory-usage causes extra code to be generated in order to check
834 memory accesses. This is used by a detector of bad memory accesses such
836 int flag_check_memory_usage = 0;
838 /* -fprefix-function-name causes function name to be prefixed. This
839 can be used with -fcheck-memory-usage to isolate code compiled with
840 -fcheck-memory-usage. */
841 int flag_prefix_function_name = 0;
843 /* 0 if pointer arguments may alias each other. True in C.
844 1 if pointer arguments may not alias each other but may alias
846 2 if pointer arguments may not alias each other and may not
847 alias global variables. True in Fortran.
848 This defaults to 0 for C. */
849 int flag_argument_noalias = 0;
851 /* Nonzero if we should do (language-dependent) alias analysis.
852 Typically, this analysis will assume that expressions of certain
853 types do not alias expressions of certain other types. Only used
854 if alias analysis (in general) is enabled. */
855 int flag_strict_aliasing = 0;
857 /* Instrument functions with calls at entry and exit, for profiling. */
858 int flag_instrument_function_entry_exit = 0;
860 /* Nonzero means ignore `#ident' directives. 0 means handle them.
861 On SVR4 targets, it also controls whether or not to emit a
862 string identifying the compiler. */
864 int flag_no_ident = 0;
866 /* This will perform a peephole pass before sched2. */
867 int flag_peephole2 = 0;
869 /* -fbounded-pointers causes gcc to compile pointers as composite
870 objects occupying three words: the pointer value, the base address
871 of the referent object, and the address immediately beyond the end
872 of the referent object. The base and extent allow us to perform
873 runtime bounds checking. -fbounded-pointers implies -fcheck-bounds. */
874 int flag_bounded_pointers = 0;
876 /* -fcheck-bounds causes gcc to generate array bounds checks.
877 For C, C++: defaults to value of flag_bounded_pointers.
878 For ObjC: defaults to off.
879 For Java: defaults to on.
880 For Fortran: defaults to off.
881 For CHILL: defaults to off. */
882 int flag_bounds_check = 0;
884 /* If one, renumber instruction UIDs to reduce the number of
885 unused UIDs if there are a lot of instructions. If greater than
886 one, unconditionally renumber instruction UIDs. */
887 int flag_renumber_insns = 1;
889 /* Values of the -falign-* flags: how much to align labels in code.
890 0 means `use default', 1 means `don't align'.
891 For each variable, there is an _log variant which is the power
892 of two not less than the variable, for .align output. */
899 int align_labels_log;
901 int align_functions_log;
903 /* Table of supported debugging formats. */
907 /* Since PREFERRED_DEBUGGING_TYPE isn't necessarily a
908 constant expression, we use NO_DEBUG in its place. */
909 enum debug_info_type debug_type;
910 int use_extensions_p;
911 const char *description;
915 { "", NO_DEBUG, DEFAULT_GDB_EXTENSIONS,
916 "Generate default debug format output" },
917 { "gdb", NO_DEBUG, 1, "Generate default extended debug format output" },
918 #ifdef DBX_DEBUGGING_INFO
919 { "stabs", DBX_DEBUG, 0, "Generate STABS format debug output" },
920 { "stabs+", DBX_DEBUG, 1, "Generate extended STABS format debug output" },
922 #ifdef DWARF_DEBUGGING_INFO
923 { "dwarf", DWARF_DEBUG, 0, "Generate DWARF-1 format debug output"},
924 { "dwarf+", DWARF_DEBUG, 1,
925 "Generated extended DWARF-1 format debug output" },
927 #ifdef DWARF2_DEBUGGING_INFO
928 { "dwarf-2", DWARF2_DEBUG, 0, "Enable DWARF-2 debug output" },
930 #ifdef XCOFF_DEBUGGING_INFO
931 { "xcoff", XCOFF_DEBUG, 0, "Generate XCOFF format debug output" },
932 { "xcoff+", XCOFF_DEBUG, 1, "Generate extended XCOFF format debug output" },
934 #ifdef SDB_DEBUGGING_INFO
935 { "coff", SDB_DEBUG, 0, "Generate COFF format debug output" },
945 const char *description;
947 lang_independent_options;
949 /* Add or remove a leading underscore from user symbols. */
950 int flag_leading_underscore = -1;
952 /* The user symbol prefix after having resolved same. */
953 const char *user_label_prefix;
955 /* A default for same. */
956 #ifndef USER_LABEL_PREFIX
957 #define USER_LABEL_PREFIX ""
960 /* Table of language-independent -f options.
961 STRING is the option name. VARIABLE is the address of the variable.
962 ON_VALUE is the value to store in VARIABLE
963 if `-fSTRING' is seen as an option.
964 (If `-fno-STRING' is seen as an option, the opposite value is stored.) */
966 lang_independent_options f_options[] =
968 {"eliminate-dwarf2-dups", &flag_eliminate_dwarf2_dups, 1,
969 "Perform DWARF2 duplicate elimination"},
970 {"float-store", &flag_float_store, 1,
971 "Do not store floats in registers" },
972 {"volatile", &flag_volatile, 1,
973 "Consider all mem refs through pointers as volatile"},
974 {"volatile-global", &flag_volatile_global, 1,
975 "Consider all mem refs to global data to be volatile" },
976 {"volatile-static", &flag_volatile_static, 1,
977 "Consider all mem refs to static data to be volatile" },
978 {"defer-pop", &flag_defer_pop, 1,
979 "Defer popping functions args from stack until later" },
980 {"omit-frame-pointer", &flag_omit_frame_pointer, 1,
981 "When possible do not generate stack frames"},
982 {"optimize-sibling-calls", &flag_optimize_sibling_calls, 1,
983 "Optimize sibling and tail recursive calls" },
984 {"cse-follow-jumps", &flag_cse_follow_jumps, 1,
985 "When running CSE, follow jumps to their targets" },
986 {"cse-skip-blocks", &flag_cse_skip_blocks, 1,
987 "When running CSE, follow conditional jumps" },
988 {"expensive-optimizations", &flag_expensive_optimizations, 1,
989 "Perform a number of minor, expensive optimisations" },
990 {"thread-jumps", &flag_thread_jumps, 1,
991 "Perform jump threading optimisations"},
992 {"strength-reduce", &flag_strength_reduce, 1,
993 "Perform strength reduction optimisations" },
994 {"unroll-loops", &flag_unroll_loops, 1,
995 "Perform loop unrolling when iteration count is known" },
996 {"unroll-all-loops", &flag_unroll_all_loops, 1,
997 "Perform loop unrolling for all loops" },
998 {"move-all-movables", &flag_move_all_movables, 1,
999 "Force all loop invariant computations out of loops" },
1000 {"reduce-all-givs", &flag_reduce_all_givs, 1,
1001 "Strength reduce all loop general induction variables" },
1002 {"writable-strings", &flag_writable_strings, 1,
1003 "Store strings in writable data section" },
1004 {"peephole", &flag_no_peephole, 0,
1005 "Enable machine specific peephole optimisations" },
1006 {"force-mem", &flag_force_mem, 1,
1007 "Copy memory operands into registers before using" },
1008 {"force-addr", &flag_force_addr, 1,
1009 "Copy memory address constants into regs before using" },
1010 {"function-cse", &flag_no_function_cse, 0,
1011 "Allow function addresses to be held in registers" },
1012 {"inline-functions", &flag_inline_functions, 1,
1013 "Integrate simple functions into their callers" },
1014 {"keep-inline-functions", &flag_keep_inline_functions, 1,
1015 "Generate code for funcs even if they are fully inlined" },
1016 {"inline", &flag_no_inline, 0,
1017 "Pay attention to the 'inline' keyword"},
1018 {"keep-static-consts", &flag_keep_static_consts, 1,
1019 "Emit static const variables even if they are not used" },
1020 {"syntax-only", &flag_syntax_only, 1,
1021 "Check for syntax errors, then stop" },
1022 {"shared-data", &flag_shared_data, 1,
1023 "Mark data as shared rather than private" },
1024 {"caller-saves", &flag_caller_saves, 1,
1025 "Enable saving registers around function calls" },
1026 {"pcc-struct-return", &flag_pcc_struct_return, 1,
1027 "Return 'short' aggregates in memory, not registers" },
1028 {"reg-struct-return", &flag_pcc_struct_return, 0,
1029 "Return 'short' aggregates in registers" },
1030 {"delayed-branch", &flag_delayed_branch, 1,
1031 "Attempt to fill delay slots of branch instructions" },
1032 {"gcse", &flag_gcse, 1,
1033 "Perform the global common subexpression elimination" },
1034 {"rerun-cse-after-loop", &flag_rerun_cse_after_loop, 1,
1035 "Run CSE pass after loop optimisations"},
1036 {"rerun-loop-opt", &flag_rerun_loop_opt, 1,
1037 "Run the loop optimiser twice"},
1038 {"delete-null-pointer-checks", &flag_delete_null_pointer_checks, 1,
1039 "Delete useless null pointer checks" },
1040 {"pretend-float", &flag_pretend_float, 1,
1041 "Pretend that host and target use the same FP format"},
1042 {"schedule-insns", &flag_schedule_insns, 1,
1043 "Reschedule instructions to avoid pipeline stalls"},
1044 {"schedule-insns2", &flag_schedule_insns_after_reload, 1,
1045 "Run two passes of the instruction scheduler"},
1046 {"sched-interblock",&flag_schedule_interblock, 1,
1047 "Enable scheduling across basic blocks" },
1048 {"sched-spec",&flag_schedule_speculative, 1,
1049 "Allow speculative motion of non-loads" },
1050 {"sched-spec-load",&flag_schedule_speculative_load, 1,
1051 "Allow speculative motion of some loads" },
1052 {"sched-spec-load-dangerous",&flag_schedule_speculative_load_dangerous, 1,
1053 "Allow speculative motion of more loads" },
1054 {"branch-count-reg",&flag_branch_on_count_reg, 1,
1055 "Replace add,compare,branch with branch on count reg"},
1056 {"pic", &flag_pic, 1,
1057 "Generate position independent code, if possible"},
1058 {"PIC", &flag_pic, 2, ""},
1059 {"exceptions", &flag_exceptions, 1,
1060 "Enable exception handling" },
1061 {"new-exceptions", &flag_new_exceptions, 1,
1062 "Use the new model for exception handling" },
1063 {"unwind-tables", &flag_unwind_tables, 1,
1064 "Just generate unwind tables for exception handling" },
1065 {"sjlj-exceptions", &exceptions_via_longjmp, 1,
1066 "Use setjmp/longjmp to handle exceptions" },
1067 {"asynchronous-exceptions", &asynchronous_exceptions, 1,
1068 "Support asynchronous exceptions" },
1069 {"profile-arcs", &profile_arc_flag, 1,
1070 "Insert arc based program profiling code" },
1071 {"test-coverage", &flag_test_coverage, 1,
1072 "Create data files needed by gcov" },
1073 {"branch-probabilities", &flag_branch_probabilities, 1,
1074 "Use profiling information for branch probabilities" },
1075 {"reorder-blocks", &flag_reorder_blocks, 1,
1076 "Reorder basic blocks to improve code placement" },
1077 {"rename-registers", &flag_rename_registers, 1,
1078 "Do the register renaming optimization pass"},
1079 {"fast-math", &flag_fast_math, 1,
1080 "Improve FP speed by violating ANSI & IEEE rules" },
1081 {"common", &flag_no_common, 0,
1082 "Do not put unitialised globals in the common section" },
1083 {"inhibit-size-directive", &flag_inhibit_size_directive, 1,
1084 "Do not generate .size directives" },
1085 {"function-sections", &flag_function_sections, 1,
1086 "place each function into its own section" },
1087 {"data-sections", &flag_data_sections, 1,
1088 "place data items into their own section" },
1089 {"verbose-asm", &flag_verbose_asm, 1,
1090 "Add extra commentry to assembler output"},
1091 {"gnu-linker", &flag_gnu_linker, 1,
1092 "Output GNU ld formatted global initialisers"},
1093 {"regmove", &flag_regmove, 1,
1094 "Enables a register move optimisation"},
1095 {"optimize-register-move", &flag_regmove, 1,
1096 "Do the full regmove optimization pass"},
1097 {"pack-struct", &flag_pack_struct, 1,
1098 "Pack structure members together without holes" },
1099 {"stack-check", &flag_stack_check, 1,
1100 "Insert stack checking code into the program" },
1101 {"argument-alias", &flag_argument_noalias, 0,
1102 "Specify that arguments may alias each other & globals"},
1103 {"argument-noalias", &flag_argument_noalias, 1,
1104 "Assume arguments may alias globals but not each other"},
1105 {"argument-noalias-global", &flag_argument_noalias, 2,
1106 "Assume arguments do not alias each other or globals" },
1107 {"strict-aliasing", &flag_strict_aliasing, 1,
1108 "Assume strict aliasing rules apply" },
1109 {"align-loops", &align_loops, 0,
1110 "Align the start of loops" },
1111 {"align-jumps", &align_jumps, 0,
1112 "Align labels which are only reached by jumping" },
1113 {"align-labels", &align_labels, 0,
1114 "Align all labels" },
1115 {"align-functions", &align_functions, 0,
1116 "Align the start of functions" },
1117 {"check-memory-usage", &flag_check_memory_usage, 1,
1118 "Generate code to check every memory access" },
1119 {"prefix-function-name", &flag_prefix_function_name, 1,
1120 "Add a prefix to all function names" },
1121 {"dump-unnumbered", &flag_dump_unnumbered, 1,
1122 "Suppress output of instruction numbers and line number notes in debugging dumps"},
1123 {"instrument-functions", &flag_instrument_function_entry_exit, 1,
1124 "Instrument function entry/exit with profiling calls"},
1125 {"ssa", &flag_ssa, 1,
1126 "Enable SSA optimizations" },
1127 {"dce", &flag_dce, 1,
1128 "Enable dead code elimination" },
1129 {"leading-underscore", &flag_leading_underscore, 1,
1130 "External symbols have a leading underscore" },
1131 {"ident", &flag_no_ident, 0,
1132 "Process #ident directives"},
1133 { "peephole2", &flag_peephole2, 1,
1134 "Enables an rtl peephole pass run before sched2" },
1135 {"math-errno", &flag_errno_math, 1,
1136 "Set errno after built-in math functions"},
1137 {"bounded-pointers", &flag_bounded_pointers, 1,
1138 "Compile pointers as triples: value, base & end" },
1139 {"bounds-check", &flag_bounds_check, 1,
1140 "Generate code to check bounds before dereferencing pointers and arrays" },
1141 {"single-precision-constant", &flag_single_precision_constant, 1,
1142 "Convert floating point constant to single precision constant"},
1143 {"time-report", &time_report, 1,
1144 "Report time taken by each compiler pass at end of run"},
1145 {"mem-report", &mem_report, 1,
1146 "Report on permanent memory allocation at end of run"},
1149 /* Table of language-specific options. */
1151 static struct lang_opt
1154 const char *description;
1156 documented_lang_options[] =
1158 /* In order not to overload the --help output, the convention
1159 used here is to only describe those options which are not
1160 enabled by default. */
1162 { "-ansi", "Compile just for ISO C89" },
1163 { "-fallow-single-precision",
1164 "Do not promote floats to double if using -traditional" },
1165 { "-std= ", "Determine language standard"},
1167 { "-fsigned-bitfields", "" },
1168 { "-funsigned-bitfields","Make bitfields by unsigned by default" },
1169 { "-fno-signed-bitfields", "" },
1170 { "-fno-unsigned-bitfields","" },
1171 { "-fsigned-char", "Make 'char' be signed by default"},
1172 { "-funsigned-char", "Make 'char' be unsigned by default"},
1173 { "-fno-signed-char", "" },
1174 { "-fno-unsigned-char", "" },
1176 { "-ftraditional", "" },
1177 { "-traditional", "Attempt to support traditional K&R style C"},
1178 { "-fnotraditional", "" },
1179 { "-fno-traditional", "" },
1182 { "-fno-asm", "Do not recognise the 'asm' keyword" },
1183 { "-fbuiltin", "" },
1184 { "-fno-builtin", "Do not recognise any built in functions" },
1185 { "-fhosted", "Assume normal C execution environment" },
1186 { "-fno-hosted", "" },
1188 "Assume that standard libraries & main might not exist" },
1189 { "-fno-freestanding", "" },
1190 { "-fcond-mismatch", "Allow different types as args of ? operator"},
1191 { "-fno-cond-mismatch", "" },
1192 { "-fdollars-in-identifiers", "Allow the use of $ inside identifiers" },
1193 { "-fno-dollars-in-identifiers", "" },
1194 { "-fpreprocessed", "" },
1195 { "-fno-preprocessed", "" },
1196 { "-fshort-double", "Use the same size for double as for float" },
1197 { "-fno-short-double", "" },
1198 { "-fshort-enums", "Use the smallest fitting integer to hold enums"},
1199 { "-fno-short-enums", "" },
1200 { "-fshort-wchar", "Override the underlying type for wchar_t to `unsigned short'" },
1201 { "-fno-short-wchar", "" },
1203 { "-Wall", "Enable most warning messages" },
1204 { "-Wbad-function-cast",
1205 "Warn about casting functions to incompatible types" },
1206 { "-Wno-bad-function-cast", "" },
1207 { "-Wmissing-noreturn",
1208 "Warn about functions which might be candidates for attribute noreturn" },
1209 { "-Wno-missing-noreturn", "" },
1210 { "-Wmissing-format-attribute",
1211 "Warn about functions which might be candidates for format attributes" },
1212 { "-Wno-missing-format-attribute", "" },
1213 { "-Wcast-qual", "Warn about casts which discard qualifiers"},
1214 { "-Wno-cast-qual", "" },
1215 { "-Wchar-subscripts", "Warn about subscripts whose type is 'char'"},
1216 { "-Wno-char-subscripts", "" },
1217 { "-Wcomment", "Warn if nested comments are detected" },
1218 { "-Wno-comment", "" },
1219 { "-Wcomments", "Warn if nested comments are detected" },
1220 { "-Wno-comments", "" },
1221 { "-Wconversion", "Warn about possibly confusing type conversions" },
1222 { "-Wno-conversion", "" },
1223 { "-Wformat", "Warn about printf format anomalies" },
1224 { "-Wno-format", "" },
1225 { "-Wimplicit-function-declaration",
1226 "Warn about implicit function declarations" },
1227 { "-Wno-implicit-function-declaration", "" },
1228 { "-Werror-implicit-function-declaration", "" },
1229 { "-Wimplicit-int", "Warn when a declaration does not specify a type" },
1230 { "-Wno-implicit-int", "" },
1231 { "-Wimplicit", "" },
1232 { "-Wno-implicit", "" },
1233 { "-Wimport", "Warn about the use of the #import directive" },
1234 { "-Wno-import", "" },
1235 { "-Wlong-long","" },
1236 { "-Wno-long-long", "Do not warn about using 'long long' when -pedantic" },
1237 { "-Wmain", "Warn about suspicious declarations of main" },
1238 { "-Wno-main", "" },
1239 { "-Wmissing-braces",
1240 "Warn about possibly missing braces around initialisers" },
1241 { "-Wno-missing-braces", "" },
1242 { "-Wmissing-declarations",
1243 "Warn about global funcs without previous declarations"},
1244 { "-Wno-missing-declarations", "" },
1245 { "-Wmissing-prototypes", "Warn about global funcs without prototypes" },
1246 { "-Wno-missing-prototypes", "" },
1247 { "-Wmultichar", "Warn about use of multicharacter literals"},
1248 { "-Wno-multichar", "" },
1249 { "-Wnested-externs", "Warn about externs not at file scope level" },
1250 { "-Wno-nested-externs", "" },
1251 { "-Wparentheses", "Warn about possible missing parentheses" },
1252 { "-Wno-parentheses", "" },
1253 { "-Wsequence-point",
1254 "Warn about possible violations of sequence point rules" },
1255 { "-Wno-sequence-point", "" },
1256 { "-Wpointer-arith", "Warn about function pointer arithmetic" },
1257 { "-Wno-pointer-arith", "" },
1258 { "-Wredundant-decls",
1259 "Warn about multiple declarations of the same object" },
1260 { "-Wno-redundant-decls", "" },
1261 { "-Wsign-compare", "Warn about signed/unsigned comparisons" },
1262 { "-Wno-sign-compare", "" },
1263 { "-Wfloat-equal", "Warn about testing equality of floating point numbers" },
1264 { "-Wno-float-equal", "" },
1265 { "-Wunknown-pragmas", "Warn about unrecognized pragmas" },
1266 { "-Wno-unknown-pragmas", "" },
1267 { "-Wstrict-prototypes", "Warn about non-prototyped function decls" },
1268 { "-Wno-strict-prototypes", "" },
1269 { "-Wtraditional", "Warn about constructs whose meaning change in ISO C"},
1270 { "-Wno-traditional", "" },
1271 { "-Wtrigraphs", "Warn when trigraphs are encountered" },
1272 { "-Wno-trigraphs", "" },
1274 { "-Wno-undef", "" },
1275 { "-Wwrite-strings", "Mark strings as 'const char *'"},
1276 { "-Wno-write-strings", "" },
1278 #define DEFINE_LANG_NAME(NAME) { NULL, NAME },
1280 #include "options.h"
1284 /* Here is a table, controlled by the tm.h file, listing each -m switch
1285 and which bits in `target_switches' it should set or clear.
1286 If VALUE is positive, it is bits to set.
1287 If VALUE is negative, -VALUE is bits to clear.
1288 (The sign bit is not used so there is no confusion.) */
1294 const char *description;
1296 target_switches [] = TARGET_SWITCHES;
1298 /* This table is similar, but allows the switch to have a value. */
1300 #ifdef TARGET_OPTIONS
1304 const char **variable;
1305 const char *description;
1307 target_options [] = TARGET_OPTIONS;
1310 /* Options controlling warnings. */
1312 /* Don't print warning messages. -w. */
1314 int inhibit_warnings = 0;
1316 /* Don't suppress warnings from system headers. -Wsystem-headers. */
1318 int warn_system_headers = 0;
1320 /* Print various extra warnings. -W. */
1322 int extra_warnings = 0;
1324 /* Treat warnings as errors. -Werror. */
1326 int warnings_are_errors = 0;
1328 /* Nonzero to warn about unused variables, functions et.al. */
1330 int warn_unused_function;
1331 int warn_unused_label;
1332 int warn_unused_parameter;
1333 int warn_unused_variable;
1334 int warn_unused_value;
1337 set_Wunused (setting)
1340 warn_unused_function = setting;
1341 warn_unused_label = setting;
1342 /* Unused function parameter warnings are reported when either ``-W
1343 -Wunused'' or ``-Wunused-parameter'' is specified. Differentiate
1344 -Wunused by setting WARN_UNUSED_PARAMETER to -1. */
1346 warn_unused_parameter = 0;
1347 else if (!warn_unused_parameter)
1348 warn_unused_parameter = -1;
1349 warn_unused_variable = setting;
1350 warn_unused_value = setting;
1353 /* Nonzero to warn about code which is never reached. */
1355 int warn_notreached;
1357 /* Nonzero to warn about variables used before they are initialized. */
1359 int warn_uninitialized;
1361 /* Nonzero means warn about all declarations which shadow others. */
1365 /* Warn if a switch on an enum fails to have a case for every enum value. */
1369 /* Nonzero means warn about function definitions that default the return type
1370 or that use a null return and have a return-type other than void. */
1372 int warn_return_type;
1374 /* Nonzero means warn about pointer casts that increase the required
1375 alignment of the target type (and might therefore lead to a crash
1376 due to a misaligned access). */
1378 int warn_cast_align;
1380 /* Nonzero means warn about any identifiers that match in the first N
1381 characters. The value N is in `id_clash_len'. */
1386 /* Nonzero means warn about any objects definitions whose size is larger
1387 than N bytes. Also want about function definitions whose returned
1388 values are larger than N bytes. The value N is in `larger_than_size'. */
1390 int warn_larger_than;
1391 HOST_WIDE_INT larger_than_size;
1393 /* Nonzero means warn if inline function is too large. */
1397 /* Warn if a function returns an aggregate,
1398 since there are often incompatible calling conventions for doing this. */
1400 int warn_aggregate_return;
1402 /* Warn if packed attribute on struct is unnecessary and inefficient. */
1406 /* Warn when gcc pads a structure to an alignment boundary. */
1410 /* Warn when an optimization pass is disabled. */
1412 int warn_disabled_optimization;
1414 /* Warn about functions which might be candidates for attribute noreturn. */
1416 int warn_missing_noreturn;
1418 /* Likewise for -W. */
1420 lang_independent_options W_options[] =
1422 {"unused-function", &warn_unused_function, 1, "Warn when a function is unused" },
1423 {"unused-label", &warn_unused_label, 1, "Warn when a label is unused" },
1424 {"unused-parameter", &warn_unused_parameter, 1, "Warn when a function parameter is unused" },
1425 {"unused-variable", &warn_unused_variable, 1, "Warn when a variable is unused" },
1426 {"unused-value", &warn_unused_value, 1, "Warn when an expression value is unused" },
1427 {"system-headers", &warn_system_headers, 1, "Do not suppress warnings from system headers"},
1428 {"error", &warnings_are_errors, 1, ""},
1429 {"shadow", &warn_shadow, 1, "Warn when one local variable shadows another" },
1430 {"switch", &warn_switch, 1,
1431 "Warn about enumerated switches missing a specific case" },
1432 {"aggregate-return", &warn_aggregate_return, 1,
1433 "Warn about returning structures, unions or arrays" },
1434 {"cast-align", &warn_cast_align, 1,
1435 "Warn about pointer casts which increase alignment" },
1436 {"unreachable-code", &warn_notreached, 1,
1437 "Warn about code that will never be executed" },
1438 {"uninitialized", &warn_uninitialized, 1,
1439 "Warn about unitialized automatic variables"},
1440 {"inline", &warn_inline, 1,
1441 "Warn when an inlined function cannot be inlined"},
1442 {"packed", &warn_packed, 1,
1443 "Warn when the packed attribute has no effect on struct layout"},
1444 {"padded", &warn_padded, 1,
1445 "Warn when padding is required to align struct members"},
1446 {"disabled-optimization", &warn_disabled_optimization, 1,
1447 "Warn when an optimization pass is disabled"}
1450 /* Output files for assembler code (real compiler output)
1451 and debugging dumps. */
1454 FILE *aux_info_file;
1455 FILE *rtl_dump_file = NULL;
1457 /* Decode the string P as an integral parameter.
1458 If the string is indeed an integer return its numeric value else
1459 issue an Invalid Option error for the option PNAME and return DEFVAL.
1460 If PNAME is zero just return DEFVAL, do not call error. */
1463 read_integral_parameter (p, pname, defval)
1468 const char *endp = p;
1472 if (*endp >= '0' && *endp <= '9')
1481 error ("Invalid option `%s'", pname);
1489 /* This is the default decl_printable_name function. */
1492 decl_name (decl, verbosity)
1494 int verbosity ATTRIBUTE_UNUSED;
1496 return IDENTIFIER_POINTER (DECL_NAME (decl));
1499 /* Mark P for GC. Also mark main_input_filename and input_filename. */
1505 struct file_stack *stack = *(struct file_stack **)p;
1507 /* We're only called for input_file_stack, so we can mark the current
1508 input_filename here as well. */
1509 ggc_mark_string (main_input_filename);
1510 ggc_mark_string (input_filename);
1514 ggc_mark_string (stack->name);
1515 stack = stack->next;
1520 /* This calls abort and is used to avoid problems when abort if a macro.
1521 It is used when we need to pass the address of abort. */
1529 /* When `malloc.c' is compiled with `rcheck' defined,
1530 it calls this function to report clobberage. */
1534 const char *s ATTRIBUTE_UNUSED;
1539 /* Return the logarithm of X, base 2, considering X unsigned,
1540 if X is a power of 2. Otherwise, returns -1.
1542 This should be used via the `exact_log2' macro. */
1546 register unsigned HOST_WIDE_INT x;
1548 register int log = 0;
1549 /* Test for 0 or a power of 2. */
1550 if (x == 0 || x != (x & -x))
1552 while ((x >>= 1) != 0)
1557 /* Given X, an unsigned number, return the largest int Y such that 2**Y <= X.
1558 If X is 0, return -1.
1560 This should be used via the floor_log2 macro. */
1564 register unsigned HOST_WIDE_INT x;
1566 register int log = -1;
1573 static int float_handler_set;
1575 jmp_buf float_handler;
1577 /* Signals actually come here. */
1580 float_signal (signo)
1581 /* If this is missing, some compilers complain. */
1582 int signo ATTRIBUTE_UNUSED;
1584 if (float_handled == 0)
1585 crash_signal (signo);
1586 #if defined (USG) || defined (hpux)
1587 /* Re-enable the signal catcher. */
1588 signal (SIGFPE, float_signal);
1591 signal (SIGFPE, float_signal);
1592 longjmp (float_handler, 1);
1595 /* Specify where to longjmp to when a floating arithmetic error happens.
1596 If HANDLER is 0, it means don't handle the errors any more. */
1599 set_float_handler (handler)
1602 float_handled = (handler != 0);
1604 bcopy ((char *) handler, (char *) float_handler, sizeof (float_handler));
1606 if (float_handled && ! float_handler_set)
1608 signal (SIGFPE, float_signal);
1609 float_handler_set = 1;
1613 /* This is a wrapper function for code which might elicit an
1614 arithmetic exception. That code should be passed in as a function
1615 pointer FN, and one argument DATA. DATA is usually a struct which
1616 contains the real input and output for function FN. This function
1617 returns 0 (failure) if longjmp was called (i.e. an exception
1618 occured.) It returns 1 (success) otherwise. */
1621 do_float_handler (fn, data)
1622 void (*fn) PARAMS ((PTR));
1629 /* We got here via longjmp () caused by an exception in function
1631 set_float_handler (NULL);
1635 set_float_handler (buf);
1637 set_float_handler (NULL);
1641 /* Specify, in HANDLER, where to longjmp to when a floating arithmetic
1642 error happens, pushing the previous specification into OLD_HANDLER.
1643 Return an indication of whether there was a previous handler in effect. */
1646 push_float_handler (handler, old_handler)
1647 jmp_buf handler, old_handler;
1649 int was_handled = float_handled;
1653 memcpy ((char *) old_handler, (char *) float_handler,
1654 sizeof (float_handler));
1656 memcpy ((char *) float_handler, (char *) handler, sizeof (float_handler));
1660 /* Restore the previous specification of whether and where to longjmp to
1661 when a floating arithmetic error happens. */
1664 pop_float_handler (handled, handler)
1668 float_handled = handled;
1670 bcopy ((char *) handler, (char *) float_handler, sizeof (float_handler));
1673 /* Handler for fatal signals, such as SIGSEGV. These are transformed
1674 into ICE messages, which is much more user friendly. */
1677 crash_signal (signo)
1678 /* If this is missing, some compilers complain. */
1681 fatal ("Internal error: %s.\n\
1682 Please submit a full bug report.\n\
1683 See %s for instructions.", strsignal (signo), GCCBUGURL);
1686 /* Strip off a legitimate source ending from the input string NAME of
1687 length LEN. Rather than having to know the names used by all of
1688 our front ends, we strip off an ending of a period followed by
1689 up to five characters. (Java uses ".class".) */
1692 strip_off_ending (name, len)
1697 for (i = 2; i < 6 && len > i; i++)
1699 if (name[len - i] == '.')
1701 name[len - i] = '\0';
1707 /* Given a file name X, return the nondirectory portion. */
1710 file_name_nondirectory (x)
1713 char *tmp = (char *) rindex (x, '/');
1714 if (DIR_SEPARATOR != '/' && ! tmp)
1715 tmp = (char *) rindex (x, DIR_SEPARATOR);
1717 return (char *) (tmp + 1);
1722 /* Output a quoted string. */
1725 output_quoted_string (asm_file, string)
1729 #ifdef OUTPUT_QUOTED_STRING
1730 OUTPUT_QUOTED_STRING (asm_file, string);
1734 putc ('\"', asm_file);
1735 while ((c = *string++) != 0)
1737 if (c == '\"' || c == '\\')
1738 putc ('\\', asm_file);
1741 putc ('\"', asm_file);
1745 /* Output a file name in the form wanted by System V. */
1748 output_file_directive (asm_file, input_name)
1750 const char *input_name;
1752 int len = strlen (input_name);
1753 const char *na = input_name + len;
1755 /* NA gets INPUT_NAME sans directory names. */
1756 while (na > input_name)
1758 if (IS_DIR_SEPARATOR (na[-1]))
1763 #ifdef ASM_OUTPUT_MAIN_SOURCE_FILENAME
1764 ASM_OUTPUT_MAIN_SOURCE_FILENAME (asm_file, na);
1766 #ifdef ASM_OUTPUT_SOURCE_FILENAME
1767 ASM_OUTPUT_SOURCE_FILENAME (asm_file, na);
1769 fprintf (asm_file, "\t.file\t");
1770 output_quoted_string (asm_file, na);
1771 fputc ('\n', asm_file);
1776 #ifdef ASM_IDENTIFY_LANGUAGE
1777 /* Routine to build language identifier for object file. */
1780 output_lang_identify (asm_out_file)
1783 int len = strlen (lang_identify ()) + sizeof ("__gnu_compiled_") + 1;
1784 char *s = (char *) alloca (len);
1786 sprintf (s, "__gnu_compiled_%s", lang_identify ());
1787 ASM_OUTPUT_LABEL (asm_out_file, s);
1791 /* Routine to open a dump file. Return true if the dump file is enabled. */
1794 open_dump_file (index, decl)
1795 enum dump_file_index index;
1799 const char *open_arg;
1802 if (! dump_file[index].enabled)
1805 timevar_push (TV_DUMP);
1806 if (rtl_dump_file != NULL)
1807 fclose (rtl_dump_file);
1809 sprintf (seq, ".%02d.", index);
1811 if (! dump_file[index].initialized)
1813 /* If we've not initialized the files, do so now. */
1814 if (graph_dump_format != no_graph
1815 && dump_file[index].graph_dump_p)
1817 dump_name = concat (seq, dump_file[index].extension, NULL);
1818 clean_graph_dump_file (dump_base_name, dump_name);
1821 dump_file[index].initialized = 1;
1827 dump_name = concat (dump_base_name, seq,
1828 dump_file[index].extension, NULL);
1830 rtl_dump_file = fopen (dump_name, open_arg);
1831 if (rtl_dump_file == NULL)
1832 pfatal_with_name (dump_name);
1837 fprintf (rtl_dump_file, "\n;; Function %s\n\n",
1838 decl_printable_name (decl, 2));
1840 timevar_pop (TV_DUMP);
1844 /* Routine to close a dump file. */
1847 close_dump_file (index, func, insns)
1848 enum dump_file_index index;
1849 void (*func) PARAMS ((FILE *, rtx));
1852 if (! rtl_dump_file)
1855 timevar_push (TV_DUMP);
1857 && graph_dump_format != no_graph
1858 && dump_file[index].graph_dump_p)
1863 sprintf (seq, ".%02d.", index);
1864 suffix = concat (seq, dump_file[index].extension, NULL);
1865 print_rtl_graph_with_bb (dump_base_name, suffix, insns);
1870 func (rtl_dump_file, insns);
1872 fflush (rtl_dump_file);
1873 fclose (rtl_dump_file);
1875 rtl_dump_file = NULL;
1876 timevar_pop (TV_DUMP);
1879 /* Do any final processing required for the declarations in VEC, of
1880 which there are LEN. We write out inline functions and variables
1881 that have been deferred until this point, but which are required.
1882 Returns non-zero if anything was put out. */
1885 wrapup_global_declarations (vec, len)
1892 int output_something = 0;
1894 for (i = 0; i < len; i++)
1898 /* We're not deferring this any longer. */
1899 DECL_DEFER_OUTPUT (decl) = 0;
1901 if (TREE_CODE (decl) == VAR_DECL && DECL_SIZE (decl) == 0
1902 && incomplete_decl_finalize_hook != 0)
1903 (*incomplete_decl_finalize_hook) (decl);
1906 /* Now emit any global variables or functions that we have been
1907 putting off. We need to loop in case one of the things emitted
1908 here references another one which comes earlier in the list. */
1912 for (i = 0; i < len; i++)
1916 if (TREE_ASM_WRITTEN (decl) || DECL_EXTERNAL (decl))
1919 /* Don't write out static consts, unless we still need them.
1921 We also keep static consts if not optimizing (for debugging),
1922 unless the user specified -fno-keep-static-consts.
1923 ??? They might be better written into the debug information.
1924 This is possible when using DWARF.
1926 A language processor that wants static constants to be always
1927 written out (even if it is not used) is responsible for
1928 calling rest_of_decl_compilation itself. E.g. the C front-end
1929 calls rest_of_decl_compilation from finish_decl.
1930 One motivation for this is that is conventional in some
1931 environments to write things like:
1932 static const char rcsid[] = "... version string ...";
1933 intending to force the string to be in the executable.
1935 A language processor that would prefer to have unneeded
1936 static constants "optimized away" would just defer writing
1937 them out until here. E.g. C++ does this, because static
1938 constants are often defined in header files.
1940 ??? A tempting alternative (for both C and C++) would be
1941 to force a constant to be written if and only if it is
1942 defined in a main file, as opposed to an include file. */
1944 if (TREE_CODE (decl) == VAR_DECL && TREE_STATIC (decl)
1945 && (! TREE_READONLY (decl)
1946 || TREE_PUBLIC (decl)
1947 || (!optimize && flag_keep_static_consts)
1948 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl))))
1951 rest_of_decl_compilation (decl, NULL_PTR, 1, 1);
1954 if (TREE_CODE (decl) == FUNCTION_DECL
1955 && DECL_INITIAL (decl) != 0
1956 && DECL_SAVED_INSNS (decl) != 0
1957 && (flag_keep_inline_functions
1958 || (TREE_PUBLIC (decl) && !DECL_COMDAT (decl))
1959 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl))))
1962 output_inline_function (decl);
1967 output_something = 1;
1971 return output_something;
1974 /* Issue appropriate warnings for the global declarations in VEC (of
1975 which there are LEN). Output debugging information for them. */
1978 check_global_declarations (vec, len)
1985 for (i = 0; i < len; i++)
1989 if (TREE_CODE (decl) == VAR_DECL && TREE_STATIC (decl)
1990 && ! TREE_ASM_WRITTEN (decl))
1991 /* Cancel the RTL for this decl so that, if debugging info
1992 output for global variables is still to come,
1993 this one will be omitted. */
1994 DECL_RTL (decl) = NULL;
1996 /* Warn about any function
1997 declared static but not defined.
1998 We don't warn about variables,
1999 because many programs have static variables
2000 that exist only to get some text into the object file. */
2001 if (TREE_CODE (decl) == FUNCTION_DECL
2002 && (warn_unused_function
2003 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl)))
2004 && DECL_INITIAL (decl) == 0
2005 && DECL_EXTERNAL (decl)
2006 && ! DECL_ARTIFICIAL (decl)
2007 && ! TREE_PUBLIC (decl))
2009 if (TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl)))
2010 pedwarn_with_decl (decl,
2011 "`%s' used but never defined");
2013 warning_with_decl (decl,
2014 "`%s' declared `static' but never defined");
2015 /* This symbol is effectively an "extern" declaration now. */
2016 TREE_PUBLIC (decl) = 1;
2017 assemble_external (decl);
2020 /* Warn about static fns or vars defined but not used,
2021 but not about inline functions or static consts
2022 since defining those in header files is normal practice. */
2023 if (((warn_unused_function
2024 && TREE_CODE (decl) == FUNCTION_DECL && ! DECL_INLINE (decl))
2025 || (warn_unused_variable
2026 && TREE_CODE (decl) == VAR_DECL && ! TREE_READONLY (decl)))
2027 && ! DECL_IN_SYSTEM_HEADER (decl)
2028 && ! DECL_EXTERNAL (decl)
2029 && ! TREE_PUBLIC (decl)
2030 && ! TREE_USED (decl)
2031 && (TREE_CODE (decl) == FUNCTION_DECL || ! DECL_REGISTER (decl))
2032 /* The TREE_USED bit for file-scope decls
2033 is kept in the identifier, to handle multiple
2034 external decls in different scopes. */
2035 && ! TREE_USED (DECL_NAME (decl)))
2036 warning_with_decl (decl, "`%s' defined but not used");
2038 timevar_push (TV_SYMOUT);
2039 #ifdef SDB_DEBUGGING_INFO
2040 /* The COFF linker can move initialized global vars to the end.
2041 And that can screw up the symbol ordering.
2042 By putting the symbols in that order to begin with,
2043 we avoid a problem. mcsun!unido!fauern!tumuc!pes@uunet.uu.net. */
2044 if (write_symbols == SDB_DEBUG && TREE_CODE (decl) == VAR_DECL
2045 && TREE_PUBLIC (decl) && DECL_INITIAL (decl)
2046 && ! DECL_EXTERNAL (decl)
2047 && DECL_RTL (decl) != 0)
2048 sdbout_symbol (decl, 0);
2050 /* Output COFF information for non-global
2051 file-scope initialized variables. */
2052 if (write_symbols == SDB_DEBUG
2053 && TREE_CODE (decl) == VAR_DECL
2054 && DECL_INITIAL (decl)
2055 && ! DECL_EXTERNAL (decl)
2056 && DECL_RTL (decl) != 0
2057 && GET_CODE (DECL_RTL (decl)) == MEM)
2058 sdbout_toplevel_data (decl);
2059 #endif /* SDB_DEBUGGING_INFO */
2060 #ifdef DWARF_DEBUGGING_INFO
2061 /* Output DWARF information for file-scope tentative data object
2062 declarations, file-scope (extern) function declarations (which
2063 had no corresponding body) and file-scope tagged type declarations
2064 and definitions which have not yet been forced out. */
2066 if (write_symbols == DWARF_DEBUG
2067 && (TREE_CODE (decl) != FUNCTION_DECL || !DECL_INITIAL (decl)))
2068 dwarfout_file_scope_decl (decl, 1);
2070 #ifdef DWARF2_DEBUGGING_INFO
2071 /* Output DWARF2 information for file-scope tentative data object
2072 declarations, file-scope (extern) function declarations (which
2073 had no corresponding body) and file-scope tagged type declarations
2074 and definitions which have not yet been forced out. */
2076 if (write_symbols == DWARF2_DEBUG
2077 && (TREE_CODE (decl) != FUNCTION_DECL || !DECL_INITIAL (decl)))
2078 dwarf2out_decl (decl);
2080 timevar_pop (TV_SYMOUT);
2084 /* Save the current INPUT_FILENAME and LINENO on the top entry in the
2085 INPUT_FILE_STACK. Push a new entry for FILE and LINE, and set the
2086 INPUT_FILENAME and LINENO accordingly. */
2089 push_srcloc (file, line)
2093 struct file_stack *fs;
2095 if (input_file_stack)
2097 input_file_stack->name = input_filename;
2098 input_file_stack->line = lineno;
2101 fs = (struct file_stack *) xmalloc (sizeof (struct file_stack));
2102 fs->name = input_filename = file;
2103 fs->line = lineno = line;
2104 fs->indent_level = 0;
2105 fs->next = input_file_stack;
2106 input_file_stack = fs;
2107 input_file_stack_tick++;
2110 /* Pop the top entry off the stack of presently open source files.
2111 Restore the INPUT_FILENAME and LINENO from the new topmost entry on
2117 struct file_stack *fs;
2119 fs = input_file_stack;
2120 input_file_stack = fs->next;
2122 input_file_stack_tick++;
2123 /* The initial souce file is never popped. */
2124 if (!input_file_stack)
2126 input_filename = input_file_stack->name;
2127 lineno = input_file_stack->line;
2130 /* Compile an entire file of output from cpp, named NAME.
2131 Write a file of assembly output and various debugging dumps. */
2139 int name_specified = name != 0;
2141 if (dump_base_name == 0)
2142 dump_base_name = name ? name : "gccdump";
2147 /* Start timing total execution time. */
2150 timevar_start (TV_TOTAL);
2152 /* Initialize data in various passes. */
2156 name = init_parse (name);
2157 init_emit_once (debug_info_level == DINFO_LEVEL_NORMAL
2158 || debug_info_level == DINFO_LEVEL_VERBOSE
2159 || flag_test_coverage
2160 || warn_notreached);
2163 init_decl_processing ();
2169 init_function_once ();
2170 init_stor_layout_once ();
2171 init_varasm_once ();
2173 /* The following initialization functions need to generate rtl, so
2174 provide a dummy function context for them. */
2175 init_dummy_function_start ();
2178 if (flag_caller_saves)
2179 init_caller_save ();
2180 expand_dummy_function_end ();
2182 /* If auxiliary info generation is desired, open the output file.
2183 This goes in the same directory as the source file--unlike
2184 all the other output files. */
2185 if (flag_gen_aux_info)
2187 aux_info_file = fopen (aux_info_file_name, "w");
2188 if (aux_info_file == 0)
2189 pfatal_with_name (aux_info_file_name);
2192 /* Open assembler code output file. Do this even if -fsyntax-only is on,
2193 because then the driver will have provided the name of a temporary
2194 file or bit bucket for us. */
2196 if (! name_specified && asm_file_name == 0)
2197 asm_out_file = stdout;
2200 if (asm_file_name == 0)
2202 int len = strlen (dump_base_name);
2203 char *dumpname = (char *) xmalloc (len + 6);
2204 memcpy (dumpname, dump_base_name, len + 1);
2205 strip_off_ending (dumpname, len);
2206 strcat (dumpname, ".s");
2207 asm_file_name = dumpname;
2209 if (!strcmp (asm_file_name, "-"))
2210 asm_out_file = stdout;
2212 asm_out_file = fopen (asm_file_name, "w");
2213 if (asm_out_file == 0)
2214 pfatal_with_name (asm_file_name);
2217 #ifdef IO_BUFFER_SIZE
2218 setvbuf (asm_out_file, (char *) xmalloc (IO_BUFFER_SIZE),
2219 _IOFBF, IO_BUFFER_SIZE);
2223 name = ggc_alloc_string (name, strlen (name));
2225 input_filename = name;
2227 /* Put an entry on the input file stack for the main input file. */
2228 push_srcloc (input_filename, 0);
2230 /* Perform language-specific initialization.
2231 This may set main_input_filename. */
2234 /* If the input doesn't start with a #line, use the input name
2235 as the official input file name. */
2236 if (main_input_filename == 0)
2237 main_input_filename = name;
2239 if (flag_syntax_only)
2241 write_symbols = NO_DEBUG;
2243 profile_block_flag = 0;
2247 ASM_FILE_START (asm_out_file);
2249 #ifdef ASM_COMMENT_START
2250 if (flag_verbose_asm)
2252 /* Print the list of options in effect. */
2253 print_version (asm_out_file, ASM_COMMENT_START);
2254 print_switch_values (asm_out_file, 0, MAX_LINE,
2255 ASM_COMMENT_START, " ", "\n");
2256 /* Add a blank line here so it appears in assembler output but not
2258 fprintf (asm_out_file, "\n");
2262 /* Output something to inform GDB that this compilation was by GCC. */
2263 #ifndef ASM_IDENTIFY_GCC
2264 fprintf (asm_out_file, "gcc2_compiled.:\n");
2266 ASM_IDENTIFY_GCC (asm_out_file);
2269 /* Output something to identify which front-end produced this file. */
2270 #ifdef ASM_IDENTIFY_LANGUAGE
2271 ASM_IDENTIFY_LANGUAGE (asm_out_file);
2273 } /* ! flag_syntax_only */
2275 #ifndef ASM_OUTPUT_SECTION_NAME
2276 if (flag_function_sections)
2278 warning ("-ffunction-sections not supported for this target.");
2279 flag_function_sections = 0;
2281 if (flag_data_sections)
2283 warning ("-fdata-sections not supported for this target.");
2284 flag_data_sections = 0;
2288 if (flag_function_sections
2289 && (profile_flag || profile_block_flag))
2291 warning ("-ffunction-sections disabled; it makes profiling impossible.");
2292 flag_function_sections = 0;
2295 #ifndef OBJECT_FORMAT_ELF
2296 if (flag_function_sections && write_symbols != NO_DEBUG)
2297 warning ("-ffunction-sections may affect debugging on some targets.");
2300 /* ??? Note: There used to be a conditional here
2301 to call assemble_zeros without fail if DBX_DEBUGGING_INFO is defined.
2302 This was to guarantee separation between gcc_compiled. and
2303 the first function, for the sake of dbx on Suns.
2304 However, having the extra zero here confused the Emacs
2305 code for unexec, and might confuse other programs too.
2306 Therefore, I took out that change.
2307 In future versions we should find another way to solve
2308 that dbx problem. -- rms, 23 May 93. */
2310 /* Don't let the first function fall at the same address
2311 as gcc_compiled., if profiling. */
2312 if (profile_flag || profile_block_flag)
2314 /* It's best if we can write a nop here since some
2315 assemblers don't tolerate zeros in the text section. */
2316 output_asm_insn (get_insn_template (CODE_FOR_nop, NULL), NULL_PTR);
2319 /* If dbx symbol table desired, initialize writing it
2320 and output the predefined types. */
2321 timevar_push (TV_SYMOUT);
2322 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
2323 if (write_symbols == DBX_DEBUG || write_symbols == XCOFF_DEBUG)
2324 dbxout_init (asm_out_file, main_input_filename, getdecls ());
2326 #ifdef SDB_DEBUGGING_INFO
2327 if (write_symbols == SDB_DEBUG)
2328 sdbout_init (asm_out_file, main_input_filename, getdecls ());
2330 #ifdef DWARF_DEBUGGING_INFO
2331 if (write_symbols == DWARF_DEBUG)
2332 dwarfout_init (asm_out_file, main_input_filename);
2334 #ifdef DWARF2_UNWIND_INFO
2335 if (dwarf2out_do_frame ())
2336 dwarf2out_frame_init ();
2338 #ifdef DWARF2_DEBUGGING_INFO
2339 if (write_symbols == DWARF2_DEBUG)
2340 dwarf2out_init (asm_out_file, main_input_filename);
2342 timevar_pop (TV_SYMOUT);
2344 /* Initialize yet another pass. */
2346 init_final (main_input_filename);
2347 init_branch_prob (dump_base_name);
2349 timevar_push (TV_PARSE);
2351 /* Call the parser, which parses the entire file
2352 (calling rest_of_compilation for each function). */
2354 if (yyparse () != 0)
2356 if (errorcount == 0)
2357 fnotice (stderr, "Errors detected in input file (your bison.simple is out of date)\n");
2359 /* In case there were missing closebraces,
2360 get us back to the global binding level. */
2361 while (! global_bindings_p ())
2365 /* Compilation is now finished except for writing
2366 what's left of the symbol table output. */
2368 timevar_pop (TV_PARSE);
2370 if (flag_syntax_only)
2373 globals = getdecls ();
2375 /* Really define vars that have had only a tentative definition.
2376 Really output inline functions that must actually be callable
2377 and have not been output so far. */
2380 int len = list_length (globals);
2381 tree *vec = (tree *) xmalloc (sizeof (tree) * len);
2385 /* Process the decls in reverse order--earliest first.
2386 Put them into VEC from back to front, then take out from front. */
2388 for (i = 0, decl = globals; i < len; i++, decl = TREE_CHAIN (decl))
2389 vec[len - i - 1] = decl;
2391 wrapup_global_declarations (vec, len);
2393 /* This must occur after the loop to output deferred functions. Else
2394 the profiler initializer would not be emitted if all the functions
2395 in this compilation unit were deferred.
2397 output_func_start_profiler can not cause any additional functions or
2398 data to need to be output, so it need not be in the deferred function
2400 output_func_start_profiler ();
2402 /* Now that all possible functions have been output, we can dump
2403 the exception table. */
2405 #ifndef IA64_UNWIND_INFO
2406 output_exception_table ();
2408 free_exception_table ();
2410 check_global_declarations (vec, len);
2416 /* Write out any pending weak symbol declarations. */
2420 /* Do dbx symbols. */
2421 timevar_push (TV_SYMOUT);
2422 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
2423 if (write_symbols == DBX_DEBUG || write_symbols == XCOFF_DEBUG)
2424 dbxout_finish (asm_out_file, main_input_filename);
2427 #ifdef DWARF_DEBUGGING_INFO
2428 if (write_symbols == DWARF_DEBUG)
2432 #ifdef DWARF2_UNWIND_INFO
2433 if (dwarf2out_do_frame ())
2434 dwarf2out_frame_finish ();
2437 #ifdef DWARF2_DEBUGGING_INFO
2438 if (write_symbols == DWARF2_DEBUG)
2439 dwarf2out_finish ();
2441 timevar_pop (TV_SYMOUT);
2443 /* Output some stuff at end of file if nec. */
2445 end_final (dump_base_name);
2447 if (profile_arc_flag || flag_test_coverage || flag_branch_probabilities)
2449 timevar_push (TV_DUMP);
2450 open_dump_file (DFI_bp, NULL);
2454 close_dump_file (DFI_bp, NULL, NULL_RTX);
2455 timevar_pop (TV_DUMP);
2459 ASM_FILE_END (asm_out_file);
2462 /* Language-specific end of compilation actions. */
2466 /* Close the dump files. */
2468 if (flag_gen_aux_info)
2470 fclose (aux_info_file);
2472 unlink (aux_info_file_name);
2475 if (optimize > 0 && open_dump_file (DFI_combine, NULL))
2477 timevar_push (TV_DUMP);
2478 dump_combine_total_stats (rtl_dump_file);
2479 close_dump_file (DFI_combine, NULL, NULL_RTX);
2480 timevar_pop (TV_DUMP);
2483 /* Close non-debugging input and output files. Take special care to note
2484 whether fclose returns an error, since the pages might still be on the
2485 buffer chain while the file is open. */
2489 if (ferror (asm_out_file) != 0 || fclose (asm_out_file) != 0)
2490 fatal_io_error (asm_file_name);
2492 /* Do whatever is necessary to finish printing the graphs. */
2493 if (graph_dump_format != no_graph)
2497 for (i = 0; i < DFI_MAX; ++i)
2498 if (dump_file[i].initialized && dump_file[i].graph_dump_p)
2503 sprintf (seq, ".%02d.", i);
2504 suffix = concat (seq, dump_file[i].extension, NULL);
2505 finish_graph_dump_file (dump_base_name, suffix);
2511 ggc_print_statistics ();
2513 /* Free up memory for the benefit of leak detectors. */
2516 /* Stop timing total execution time. */
2517 timevar_stop (TV_TOTAL);
2519 /* Print the times. */
2521 timevar_print (stderr);
2524 /* This is called from various places for FUNCTION_DECL, VAR_DECL,
2525 and TYPE_DECL nodes.
2527 This does nothing for local (non-static) variables, unless the
2528 variable is a register variable with an ASMSPEC. In that case, or
2529 if the variable is not an automatice, it sets up the RTL and
2530 outputs any assembler code (label definition, storage allocation
2531 and initialization).
2533 DECL is the declaration. If ASMSPEC is nonzero, it specifies
2534 the assembler symbol name to be used. TOP_LEVEL is nonzero
2535 if this declaration is not within a function. */
2538 rest_of_decl_compilation (decl, asmspec, top_level, at_end)
2540 const char *asmspec;
2544 /* Declarations of variables, and of functions defined elsewhere. */
2546 /* The most obvious approach, to put an #ifndef around where
2547 this macro is used, doesn't work since it's inside a macro call. */
2548 #ifndef ASM_FINISH_DECLARE_OBJECT
2549 #define ASM_FINISH_DECLARE_OBJECT(FILE, DECL, TOP, END)
2552 /* Forward declarations for nested functions are not "external",
2553 but we need to treat them as if they were. */
2554 if (TREE_STATIC (decl) || DECL_EXTERNAL (decl)
2555 || TREE_CODE (decl) == FUNCTION_DECL)
2557 timevar_push (TV_VARCONST);
2558 make_decl_rtl (decl, asmspec, top_level);
2559 /* Initialized extern variable exists to be replaced
2560 with its value, or represents something that will be
2561 output in another file. */
2562 if (! (TREE_CODE (decl) == VAR_DECL
2563 && DECL_EXTERNAL (decl) && TREE_READONLY (decl)
2564 && DECL_INITIAL (decl) != 0
2565 && DECL_INITIAL (decl) != error_mark_node))
2566 /* Don't output anything
2567 when a tentative file-scope definition is seen.
2568 But at end of compilation, do output code for them. */
2569 if (! (! at_end && top_level
2570 && (DECL_INITIAL (decl) == 0
2571 || DECL_INITIAL (decl) == error_mark_node)))
2572 assemble_variable (decl, top_level, at_end, 0);
2573 if (decl == last_assemble_variable_decl)
2575 ASM_FINISH_DECLARE_OBJECT (asm_out_file, decl,
2578 timevar_pop (TV_VARCONST);
2580 else if (DECL_REGISTER (decl) && asmspec != 0)
2582 if (decode_reg_name (asmspec) >= 0)
2584 DECL_RTL (decl) = 0;
2585 make_decl_rtl (decl, asmspec, top_level);
2589 error ("invalid register name `%s' for register variable", asmspec);
2590 DECL_REGISTER (decl) = 0;
2591 make_decl_rtl (decl, NULL, top_level);
2594 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
2595 else if ((write_symbols == DBX_DEBUG || write_symbols == XCOFF_DEBUG)
2596 && TREE_CODE (decl) == TYPE_DECL)
2598 timevar_push (TV_SYMOUT);
2599 dbxout_symbol (decl, 0);
2600 timevar_pop (TV_SYMOUT);
2603 #ifdef SDB_DEBUGGING_INFO
2604 else if (write_symbols == SDB_DEBUG && top_level
2605 && TREE_CODE (decl) == TYPE_DECL)
2607 timevar_push (TV_SYMOUT);
2608 sdbout_symbol (decl, 0);
2609 timevar_pop (TV_SYMOUT);
2614 /* Called after finishing a record, union or enumeral type. */
2617 rest_of_type_compilation (type, toplev)
2618 #if defined(DBX_DEBUGGING_INFO) || defined(XCOFF_DEBUGGING_INFO) || defined (SDB_DEBUGGING_INFO)
2622 tree type ATTRIBUTE_UNUSED;
2623 int toplev ATTRIBUTE_UNUSED;
2626 timevar_push (TV_SYMOUT);
2627 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
2628 if (write_symbols == DBX_DEBUG || write_symbols == XCOFF_DEBUG)
2629 dbxout_symbol (TYPE_STUB_DECL (type), !toplev);
2631 #ifdef SDB_DEBUGGING_INFO
2632 if (write_symbols == SDB_DEBUG)
2633 sdbout_symbol (TYPE_STUB_DECL (type), !toplev);
2635 #ifdef DWARF2_DEBUGGING_INFO
2636 if (write_symbols == DWARF2_DEBUG && toplev)
2637 dwarf2out_decl (TYPE_STUB_DECL (type));
2639 timevar_pop (TV_SYMOUT);
2642 /* DECL is an inline function, whose body is present, but which is not
2643 being output at this point. (We're putting that off until we need
2644 to do it.) If there are any actions that need to take place,
2645 including the emission of debugging information for the function,
2646 this is where they should go. This function may be called by
2647 language-dependent code for front-ends that do not even generate
2648 RTL for functions that don't need to be put out. */
2651 note_deferral_of_defined_inline_function (decl)
2652 tree decl ATTRIBUTE_UNUSED;
2654 #ifdef DWARF_DEBUGGING_INFO
2655 /* Generate the DWARF info for the "abstract" instance of a function
2656 which we may later generate inlined and/or out-of-line instances
2658 if (write_symbols == DWARF_DEBUG && DECL_INLINE (decl))
2660 /* The front-end may not have set CURRENT_FUNCTION_DECL, but the
2661 DWARF code expects it to be set in this case. Intuitively,
2662 DECL is the function we just finished defining, so setting
2663 CURRENT_FUNCTION_DECL is sensible. */
2664 tree saved_cfd = current_function_decl;
2665 current_function_decl = decl;
2667 /* Let the DWARF code do its work. */
2668 set_decl_abstract_flags (decl, 1);
2669 dwarfout_file_scope_decl (decl, 0);
2670 set_decl_abstract_flags (decl, 0);
2672 /* Reset CURRENT_FUNCTION_DECL. */
2673 current_function_decl = saved_cfd;
2678 /* This is called from finish_function (within yyparse)
2679 after each top-level definition is parsed.
2680 It is supposed to compile that function or variable
2681 and output the assembler code for it.
2682 After we return, the tree storage is freed. */
2685 rest_of_compilation (decl)
2691 int rebuild_label_notes_after_reload;
2692 int register_life_up_to_date;
2694 timevar_push (TV_REST_OF_COMPILATION);
2696 /* Now that we're out of the frontend, we shouldn't have any more
2697 CONCATs anywhere. */
2698 generating_concat_p = 0;
2700 /* When processing delayed functions, prepare_function_start() won't
2701 have been run to re-initialize it. */
2702 cse_not_expected = ! optimize;
2704 /* First, make sure that NOTE_BLOCK is set correctly for each
2705 NOTE_INSN_BLOCK_BEG/NOTE_INSN_BLOCK_END note. */
2706 if (!cfun->x_whole_function_mode_p)
2709 /* Then remove any notes we don't need. That will make iterating
2710 over the instruction sequence faster, and allow the garbage
2711 collector to reclaim the memory used by the notes. */
2712 remove_unnecessary_notes ();
2714 /* In function-at-a-time mode, we do not attempt to keep the BLOCK
2715 tree in sensible shape. So, we just recalculate it here. */
2716 if (cfun->x_whole_function_mode_p)
2721 /* If we are reconsidering an inline function
2722 at the end of compilation, skip the stuff for making it inline. */
2724 if (DECL_SAVED_INSNS (decl) == 0)
2730 /* If this is nested inside an inlined external function, pretend
2731 it was only declared. Since we cannot inline such functions,
2732 generating code for this one is not only not necessary but will
2733 confuse some debugging output writers. */
2734 for (parent = DECL_CONTEXT (current_function_decl);
2735 parent != NULL_TREE;
2736 parent = get_containing_scope (parent))
2737 if (TREE_CODE (parent) == FUNCTION_DECL
2738 && DECL_INLINE (parent) && DECL_EXTERNAL (parent))
2740 DECL_INITIAL (decl) = 0;
2741 goto exit_rest_of_compilation;
2744 /* If requested, consider whether to make this function inline. */
2745 if (DECL_INLINE (decl) || flag_inline_functions)
2747 timevar_push (TV_INTEGRATION);
2748 lose = function_cannot_inline_p (decl);
2749 timevar_pop (TV_INTEGRATION);
2750 if (lose || ! optimize)
2752 if (warn_inline && DECL_INLINE (decl))
2753 warning_with_decl (decl, lose);
2754 DECL_ABSTRACT_ORIGIN (decl) = 0;
2755 /* Don't really compile an extern inline function.
2756 If we can't make it inline, pretend
2757 it was only declared. */
2758 if (DECL_EXTERNAL (decl))
2760 DECL_INITIAL (decl) = 0;
2761 goto exit_rest_of_compilation;
2765 /* ??? Note that this has the effect of making it look
2766 like "inline" was specified for a function if we choose
2767 to inline it. This isn't quite right, but it's
2768 probably not worth the trouble to fix. */
2769 inlinable = DECL_INLINE (decl) = 1;
2772 insns = get_insns ();
2774 /* Dump the rtl code if we are dumping rtl. */
2776 if (open_dump_file (DFI_rtl, decl))
2778 if (DECL_SAVED_INSNS (decl))
2779 fprintf (rtl_dump_file, ";; (integrable)\n\n");
2780 close_dump_file (DFI_rtl, print_rtl, insns);
2783 /* If function is inline, and we don't yet know whether to
2784 compile it by itself, defer decision till end of compilation.
2785 finish_compilation will call rest_of_compilation again
2786 for those functions that need to be output. Also defer those
2787 functions that we are supposed to defer. */
2790 || (DECL_INLINE (decl)
2791 && ((! TREE_PUBLIC (decl) && ! TREE_ADDRESSABLE (decl)
2792 && ! flag_keep_inline_functions)
2793 || DECL_EXTERNAL (decl))))
2794 DECL_DEFER_OUTPUT (decl) = 1;
2796 if (DECL_INLINE (decl))
2797 /* DWARF wants seperate debugging info for abstract and
2798 concrete instances of all inline functions, including those
2799 declared inline but not inlined, and those inlined even
2800 though they weren't declared inline. Conveniently, that's
2801 what DECL_INLINE means at this point. */
2802 note_deferral_of_defined_inline_function (decl);
2804 if (DECL_DEFER_OUTPUT (decl))
2806 /* If -Wreturn-type, we have to do a bit of compilation. We just
2807 want to call jump_optimize to figure out whether or not we can
2808 fall off the end of the function; we do the minimum amount of
2809 work necessary to make that safe. And, we set optimize to zero
2810 to keep jump_optimize from working too hard. */
2811 if (warn_return_type)
2813 int saved_optimize = optimize;
2816 find_exception_handler_labels ();
2817 jump_optimize (insns, !JUMP_CROSS_JUMP, !JUMP_NOOP_MOVES,
2818 !JUMP_AFTER_REGSCAN);
2819 optimize = saved_optimize;
2822 current_function_nothrow = nothrow_function_p ();
2823 if (current_function_nothrow)
2824 /* Now we know that this can't throw; set the flag for the benefit
2825 of other functions later in this translation unit. */
2826 TREE_NOTHROW (current_function_decl) = 1;
2828 timevar_push (TV_INTEGRATION);
2829 save_for_inline (decl);
2830 timevar_pop (TV_INTEGRATION);
2831 DECL_SAVED_INSNS (decl)->inlinable = inlinable;
2832 goto exit_rest_of_compilation;
2835 /* If specified extern inline but we aren't inlining it, we are
2836 done. This goes for anything that gets here with DECL_EXTERNAL
2837 set, not just things with DECL_INLINE. */
2838 if (DECL_EXTERNAL (decl))
2839 goto exit_rest_of_compilation;
2842 init_EXPR_INSN_LIST_cache ();
2846 /* Initialize some variables used by the optimizers. */
2847 init_function_for_compilation ();
2849 if (! DECL_DEFER_OUTPUT (decl))
2850 TREE_ASM_WRITTEN (decl) = 1;
2852 /* Now that integrate will no longer see our rtl, we need not
2853 distinguish between the return value of this function and the
2854 return value of called functions. Also, we can remove all SETs
2855 of subregs of hard registers; they are only here because of
2857 rtx_equal_function_value_matters = 0;
2858 purge_hard_subreg_sets (get_insns ());
2860 /* Don't return yet if -Wreturn-type; we need to do jump_optimize. */
2861 if ((rtl_dump_and_exit || flag_syntax_only) && !warn_return_type)
2862 goto exit_rest_of_compilation;
2864 /* Emit code to get eh context, if needed. */
2867 /* We may have potential sibling or tail recursion sites. Select one
2868 (of possibly multiple) methods of performing the call. */
2869 if (flag_optimize_sibling_calls)
2871 timevar_push (TV_JUMP);
2872 open_dump_file (DFI_sibling, decl);
2874 optimize_sibling_and_tail_recursive_calls ();
2876 close_dump_file (DFI_sibling, print_rtl, get_insns ());
2877 timevar_pop (TV_JUMP);
2881 /* If we are doing position-independent code generation, now
2882 is the time to output special prologues and epilogues.
2883 We do not want to do this earlier, because it just clutters
2884 up inline functions with meaningless insns. */
2889 insns = get_insns ();
2891 /* Copy any shared structure that should not be shared. */
2892 unshare_all_rtl (current_function_decl, insns);
2894 #ifdef SETJMP_VIA_SAVE_AREA
2895 /* This must be performed before virutal register instantiation. */
2896 if (current_function_calls_alloca)
2897 optimize_save_area_alloca (insns);
2900 /* Instantiate all virtual registers. */
2901 instantiate_virtual_regs (current_function_decl, insns);
2903 /* Find all the EH handlers. */
2904 find_exception_handler_labels ();
2906 open_dump_file (DFI_jump, decl);
2908 /* Always do one jump optimization pass to ensure that JUMP_LABEL fields
2909 are initialized and to compute whether control can drop off the end
2912 timevar_push (TV_JUMP);
2913 /* Turn NOTE_INSN_EXPECTED_VALUE into REG_BR_PROB. Do this
2914 before jump optimization switches branch directions. */
2915 expected_value_to_br_prob ();
2917 reg_scan (insns, max_reg_num (), 0);
2918 jump_optimize (insns, !JUMP_CROSS_JUMP, !JUMP_NOOP_MOVES,
2919 JUMP_AFTER_REGSCAN);
2921 timevar_pop (TV_JUMP);
2923 /* Now is when we stop if -fsyntax-only and -Wreturn-type. */
2924 if (rtl_dump_and_exit || flag_syntax_only || DECL_DEFER_OUTPUT (decl))
2926 close_dump_file (DFI_jump, print_rtl, insns);
2927 goto exit_rest_of_compilation;
2930 timevar_push (TV_JUMP);
2934 find_basic_blocks (insns, max_reg_num (), rtl_dump_file);
2935 cleanup_cfg (insns);
2937 /* ??? Run if-conversion before delete_null_pointer_checks,
2938 since the later does not preserve the CFG. This should
2939 be changed -- no since converting if's that are going to
2941 timevar_push (TV_IFCVT);
2943 timevar_pop (TV_IFCVT);
2945 /* Try to identify useless null pointer tests and delete them. */
2946 if (flag_delete_null_pointer_checks)
2947 delete_null_pointer_checks (insns);
2950 /* Jump optimization, and the removal of NULL pointer checks, may
2951 have reduced the number of instructions substantially. CSE, and
2952 future passes, allocate arrays whose dimensions involve the
2953 maximum instruction UID, so if we can reduce the maximum UID
2954 we'll save big on memory. */
2955 renumber_insns (rtl_dump_file);
2956 timevar_pop (TV_JUMP);
2958 close_dump_file (DFI_jump, print_rtl, insns);
2962 /* Perform common subexpression elimination.
2963 Nonzero value from `cse_main' means that jumps were simplified
2964 and some code may now be unreachable, so do
2965 jump optimization again. */
2969 open_dump_file (DFI_cse, decl);
2970 timevar_push (TV_CSE);
2972 reg_scan (insns, max_reg_num (), 1);
2974 if (flag_thread_jumps)
2976 timevar_push (TV_JUMP);
2977 thread_jumps (insns, max_reg_num (), 1);
2978 timevar_pop (TV_JUMP);
2981 tem = cse_main (insns, max_reg_num (), 0, rtl_dump_file);
2983 /* If we are not running the second CSE pass, then we are no longer
2984 expecting CSE to be run. */
2985 cse_not_expected = !flag_rerun_cse_after_loop;
2987 if (tem || optimize > 1)
2989 timevar_push (TV_JUMP);
2990 jump_optimize (insns, !JUMP_CROSS_JUMP, !JUMP_NOOP_MOVES,
2991 !JUMP_AFTER_REGSCAN);
2992 timevar_pop (TV_JUMP);
2995 /* Run this after jump optmizations remove all the unreachable code
2996 so that unreachable code will not keep values live. */
2997 delete_trivially_dead_insns (insns, max_reg_num ());
2999 /* Try to identify useless null pointer tests and delete them. */
3000 if (flag_delete_null_pointer_checks)
3002 timevar_push (TV_JUMP);
3003 find_basic_blocks (insns, max_reg_num (), rtl_dump_file);
3005 cleanup_cfg (insns);
3007 delete_null_pointer_checks (insns);
3008 timevar_pop (TV_JUMP);
3011 /* The second pass of jump optimization is likely to have
3012 removed a bunch more instructions. */
3013 renumber_insns (rtl_dump_file);
3015 timevar_pop (TV_CSE);
3016 close_dump_file (DFI_cse, print_rtl, insns);
3019 open_dump_file (DFI_addressof, decl);
3021 purge_addressof (insns);
3022 reg_scan (insns, max_reg_num (), 1);
3024 close_dump_file (DFI_addressof, print_rtl, insns);
3028 if (optimize > 0 && flag_ssa)
3030 /* Convert to SSA form. */
3032 timevar_push (TV_TO_SSA);
3033 open_dump_file (DFI_ssa, decl);
3035 find_basic_blocks (insns, max_reg_num (), rtl_dump_file);
3036 cleanup_cfg (insns);
3039 close_dump_file (DFI_ssa, print_rtl_with_bb, insns);
3040 timevar_pop (TV_TO_SSA);
3042 /* The SSA implementation uses basic block numbers in its phi
3043 nodes. Thus, changing the control-flow graph or the basic
3044 blocks, e.g., calling find_basic_blocks () or cleanup_cfg (),
3045 may cause problems. */
3049 /* Remove dead code. */
3051 timevar_push (TV_DEAD_CODE_ELIM);
3052 open_dump_file (DFI_dce, decl);
3054 insns = get_insns ();
3055 eliminate_dead_code();
3057 close_dump_file (DFI_dce, print_rtl_with_bb, insns);
3058 timevar_pop (TV_DEAD_CODE_ELIM);
3061 /* Convert from SSA form. */
3063 timevar_push (TV_FROM_SSA);
3064 open_dump_file (DFI_ussa, decl);
3066 convert_from_ssa ();
3067 /* New registers have been created. Rescan their usage. */
3068 reg_scan (insns, max_reg_num (), 1);
3069 /* Life analysis used in SSA adds log_links but these
3070 shouldn't be there until the flow stage, so clear
3072 clear_log_links (insns);
3074 close_dump_file (DFI_ussa, print_rtl_with_bb, insns);
3075 timevar_pop (TV_FROM_SSA);
3080 /* Perform global cse. */
3082 if (optimize > 0 && flag_gcse)
3084 timevar_push (TV_GCSE);
3085 open_dump_file (DFI_gcse, decl);
3087 find_basic_blocks (insns, max_reg_num (), rtl_dump_file);
3088 cleanup_cfg (insns);
3089 tem = gcse_main (insns, rtl_dump_file);
3091 /* If gcse altered any jumps, rerun jump optimizations to clean
3095 timevar_push (TV_JUMP);
3096 jump_optimize (insns, !JUMP_CROSS_JUMP, !JUMP_NOOP_MOVES,
3097 !JUMP_AFTER_REGSCAN);
3098 timevar_pop (TV_JUMP);
3101 close_dump_file (DFI_gcse, print_rtl, insns);
3102 timevar_pop (TV_GCSE);
3107 /* Move constant computations out of loops. */
3111 timevar_push (TV_LOOP);
3112 open_dump_file (DFI_loop, decl);
3114 if (flag_rerun_loop_opt)
3116 /* We only want to perform unrolling once. */
3118 loop_optimize (insns, rtl_dump_file, 0);
3120 /* The first call to loop_optimize makes some instructions
3121 trivially dead. We delete those instructions now in the
3122 hope that doing so will make the heuristics in loop work
3123 better and possibly speed up compilation. */
3124 delete_trivially_dead_insns (insns, max_reg_num ());
3126 /* The regscan pass is currently necessary as the alias
3127 analysis code depends on this information. */
3128 reg_scan (insns, max_reg_num (), 1);
3130 loop_optimize (insns, rtl_dump_file,
3131 (flag_unroll_loops ? LOOP_UNROLL : 0) | LOOP_BCT);
3133 close_dump_file (DFI_loop, print_rtl, insns);
3134 timevar_pop (TV_LOOP);
3141 timevar_push (TV_CSE2);
3142 open_dump_file (DFI_cse2, decl);
3144 if (flag_rerun_cse_after_loop)
3146 /* Running another jump optimization pass before the second
3147 cse pass sometimes simplifies the RTL enough to allow
3148 the second CSE pass to do a better job. Jump_optimize can change
3149 max_reg_num so we must rerun reg_scan afterwards.
3150 ??? Rework to not call reg_scan so often. */
3151 timevar_push (TV_JUMP);
3153 reg_scan (insns, max_reg_num (), 0);
3154 jump_optimize (insns, !JUMP_CROSS_JUMP,
3155 !JUMP_NOOP_MOVES, JUMP_AFTER_REGSCAN);
3157 timevar_push (TV_IFCVT);
3159 find_basic_blocks (insns, max_reg_num (), rtl_dump_file);
3160 cleanup_cfg (insns);
3163 timevar_pop(TV_IFCVT);
3165 timevar_pop (TV_JUMP);
3167 reg_scan (insns, max_reg_num (), 0);
3168 tem = cse_main (insns, max_reg_num (), 1, rtl_dump_file);
3172 timevar_push (TV_JUMP);
3173 jump_optimize (insns, !JUMP_CROSS_JUMP,
3174 !JUMP_NOOP_MOVES, !JUMP_AFTER_REGSCAN);
3175 timevar_pop (TV_JUMP);
3179 if (flag_thread_jumps)
3181 /* This pass of jump threading straightens out code
3182 that was kinked by loop optimization. */
3183 timevar_push (TV_JUMP);
3184 reg_scan (insns, max_reg_num (), 0);
3185 thread_jumps (insns, max_reg_num (), 0);
3186 timevar_pop (TV_JUMP);
3189 close_dump_file (DFI_cse2, print_rtl, insns);
3190 timevar_pop (TV_CSE2);
3195 cse_not_expected = 1;
3199 /* Do control and data flow analysis; wrote some of the results to
3202 timevar_push (TV_FLOW);
3203 open_dump_file (DFI_cfg, decl);
3205 find_basic_blocks (insns, max_reg_num (), rtl_dump_file);
3206 cleanup_cfg (insns);
3207 check_function_return_warnings ();
3209 close_dump_file (DFI_cfg, print_rtl_with_bb, insns);
3211 if (profile_arc_flag || flag_test_coverage || flag_branch_probabilities)
3213 timevar_push (TV_BRANCH_PROB);
3214 open_dump_file (DFI_bp, decl);
3218 close_dump_file (DFI_bp, print_rtl_with_bb, insns);
3219 timevar_pop (TV_BRANCH_PROB);
3222 open_dump_file (DFI_life, decl);
3227 /* Discover and record the loop depth at the head of each basic
3228 block. The loop infrastructure does the real job for us. */
3229 flow_loops_find (&loops, LOOP_TREE);
3231 /* Estimate using heuristics if no profiling info is available. */
3232 estimate_probability (&loops);
3235 flow_loops_dump (&loops, rtl_dump_file, NULL, 0);
3237 flow_loops_free (&loops);
3239 life_analysis (insns, rtl_dump_file, PROP_FINAL);
3240 mark_constant_function ();
3241 timevar_pop (TV_FLOW);
3243 register_life_up_to_date = 1;
3246 if (warn_uninitialized || extra_warnings)
3248 uninitialized_vars_warning (DECL_INITIAL (decl));
3250 setjmp_args_warning ();
3253 close_dump_file (DFI_life, print_rtl_with_bb, insns);
3257 /* If -opt, try combining insns through substitution. */
3261 int rebuild_jump_labels_after_combine = 0;
3263 timevar_push (TV_COMBINE);
3264 open_dump_file (DFI_combine, decl);
3266 rebuild_jump_labels_after_combine
3267 = combine_instructions (insns, max_reg_num ());
3269 /* Combining insns may have turned an indirect jump into a
3270 direct jump. Rebuid the JUMP_LABEL fields of jumping
3272 if (rebuild_jump_labels_after_combine)
3274 timevar_push (TV_JUMP);
3275 rebuild_jump_labels (insns);
3276 timevar_pop (TV_JUMP);
3278 timevar_push (TV_FLOW);
3279 find_basic_blocks (insns, max_reg_num (), rtl_dump_file);
3280 cleanup_cfg (insns);
3282 /* Blimey. We've got to have the CFG up to date for the call to
3283 if_convert below. However, the random deletion of blocks
3284 without updating life info can wind up with Wierd Stuff in
3285 global_live_at_end. We then run sched1, which updates things
3286 properly, discovers the wierdness and aborts. */
3287 update_life_info (NULL, UPDATE_LIFE_GLOBAL_RM_NOTES,
3288 PROP_DEATH_NOTES | PROP_KILL_DEAD_CODE
3289 | PROP_SCAN_DEAD_CODE);
3291 timevar_pop (TV_FLOW);
3294 close_dump_file (DFI_combine, print_rtl_with_bb, insns);
3295 timevar_pop (TV_COMBINE);
3300 /* Rerun if-conversion, as combine may have simplified things enough to
3301 now meet sequence length restrictions. */
3304 timevar_push (TV_IFCVT);
3305 open_dump_file (DFI_ce, decl);
3311 close_dump_file (DFI_ce, print_rtl_with_bb, insns);
3312 timevar_pop (TV_IFCVT);
3315 /* Register allocation pre-pass, to reduce number of moves
3316 necessary for two-address machines. */
3317 if (optimize > 0 && (flag_regmove || flag_expensive_optimizations))
3319 timevar_push (TV_REGMOVE);
3320 open_dump_file (DFI_regmove, decl);
3322 regmove_optimize (insns, max_reg_num (), rtl_dump_file);
3324 close_dump_file (DFI_regmove, print_rtl_with_bb, insns);
3325 timevar_pop (TV_REGMOVE);
3330 /* Any of the several passes since flow1 will have munged register
3331 lifetime data a bit. */
3333 register_life_up_to_date = 0;
3335 #ifdef OPTIMIZE_MODE_SWITCHING
3338 timevar_push (TV_GCSE);
3340 if (optimize_mode_switching (NULL_PTR))
3342 /* We did work, and so had to regenerate global life information.
3343 Take advantage of this and don't re-recompute register life
3344 information below. */
3345 register_life_up_to_date = 1;
3348 timevar_pop (TV_GCSE);
3352 #ifdef INSN_SCHEDULING
3354 /* Print function header into sched dump now
3355 because doing the sched analysis makes some of the dump. */
3356 if (optimize > 0 && flag_schedule_insns)
3358 timevar_push (TV_SCHED);
3359 open_dump_file (DFI_sched, decl);
3361 /* Do control and data sched analysis,
3362 and write some of the results to dump file. */
3364 schedule_insns (rtl_dump_file);
3366 close_dump_file (DFI_sched, print_rtl_with_bb, insns);
3367 timevar_pop (TV_SCHED);
3371 /* Register lifetime information was updated as part of verifying
3373 register_life_up_to_date = 1;
3377 /* Determine if the current function is a leaf before running reload
3378 since this can impact optimizations done by the prologue and
3379 epilogue thus changing register elimination offsets. */
3380 current_function_is_leaf = leaf_function_p ();
3382 timevar_push (TV_LOCAL_ALLOC);
3383 open_dump_file (DFI_lreg, decl);
3385 /* Allocate pseudo-regs that are used only within 1 basic block.
3387 RUN_JUMP_AFTER_RELOAD records whether or not we need to rerun the
3388 jump optimizer after register allocation and reloading are finished. */
3390 if (! register_life_up_to_date)
3391 recompute_reg_usage (insns, ! optimize_size);
3392 regclass (insns, max_reg_num (), rtl_dump_file);
3393 rebuild_label_notes_after_reload = local_alloc ();
3395 timevar_pop (TV_LOCAL_ALLOC);
3397 if (dump_file[DFI_lreg].enabled)
3399 timevar_push (TV_DUMP);
3401 dump_flow_info (rtl_dump_file);
3402 dump_local_alloc (rtl_dump_file);
3404 close_dump_file (DFI_lreg, print_rtl_with_bb, insns);
3405 timevar_pop (TV_DUMP);
3410 timevar_push (TV_GLOBAL_ALLOC);
3411 open_dump_file (DFI_greg, decl);
3413 /* If optimizing, allocate remaining pseudo-regs. Do the reload
3414 pass fixing up any insns that are invalid. */
3417 failure = global_alloc (rtl_dump_file);
3420 build_insn_chain (insns);
3421 failure = reload (insns, 0);
3424 timevar_pop (TV_GLOBAL_ALLOC);
3427 goto exit_rest_of_compilation;
3431 /* Do a very simple CSE pass over just the hard registers. */
3434 timevar_push (TV_RELOAD_CSE_REGS);
3435 reload_cse_regs (insns);
3436 timevar_pop (TV_RELOAD_CSE_REGS);
3439 /* If optimizing, then go ahead and split insns now since we are about
3440 to recompute flow information anyway. */
3443 int old_labelnum = max_label_num ();
3445 split_all_insns (0);
3446 rebuild_label_notes_after_reload |= old_labelnum != max_label_num ();
3449 /* Register allocation and reloading may have turned an indirect jump into
3450 a direct jump. If so, we must rebuild the JUMP_LABEL fields of
3451 jumping instructions. */
3452 if (rebuild_label_notes_after_reload)
3454 timevar_push (TV_JUMP);
3456 rebuild_jump_labels (insns);
3458 timevar_pop (TV_JUMP);
3461 if (dump_file[DFI_greg].enabled)
3463 timevar_push (TV_DUMP);
3465 dump_global_regs (rtl_dump_file);
3467 close_dump_file (DFI_greg, print_rtl_with_bb, insns);
3468 timevar_pop (TV_DUMP);
3471 /* Re-create the death notes which were deleted during reload. */
3472 timevar_push (TV_FLOW2);
3473 open_dump_file (DFI_flow2, decl);
3475 jump_optimize (insns, !JUMP_CROSS_JUMP,
3476 !JUMP_NOOP_MOVES, !JUMP_AFTER_REGSCAN);
3477 find_basic_blocks (insns, max_reg_num (), rtl_dump_file);
3479 /* On some machines, the prologue and epilogue code, or parts thereof,
3480 can be represented as RTL. Doing so lets us schedule insns between
3481 it and the rest of the code and also allows delayed branch
3482 scheduling to operate in the epilogue. */
3483 thread_prologue_and_epilogue_insns (insns);
3487 cleanup_cfg (insns);
3488 life_analysis (insns, rtl_dump_file, PROP_FINAL);
3490 /* This is kind of a heuristic. We need to run combine_stack_adjustments
3491 even for machines with possibly nonzero RETURN_POPS_ARGS
3492 and ACCUMULATE_OUTGOING_ARGS. We expect that only ports having
3493 push instructions will have popping returns. */
3494 #ifndef PUSH_ROUNDING
3495 if (!ACCUMULATE_OUTGOING_ARGS)
3497 combine_stack_adjustments ();
3502 flow2_completed = 1;
3504 close_dump_file (DFI_flow2, print_rtl_with_bb, insns);
3505 timevar_pop (TV_FLOW2);
3509 timevar_push (TV_IFCVT2);
3510 open_dump_file (DFI_ce2, decl);
3514 close_dump_file (DFI_ce2, print_rtl_with_bb, insns);
3515 timevar_pop (TV_IFCVT2);
3518 #ifdef HAVE_peephole2
3519 if (optimize > 0 && flag_peephole2)
3521 timevar_push (TV_PEEPHOLE2);
3522 open_dump_file (DFI_peephole2, decl);
3524 peephole2_optimize (rtl_dump_file);
3526 close_dump_file (DFI_peephole2, print_rtl_with_bb, insns);
3527 timevar_pop (TV_PEEPHOLE2);
3531 if (optimize > 0 && flag_rename_registers)
3533 timevar_push (TV_RENAME_REGISTERS);
3534 open_dump_file (DFI_rnreg, decl);
3536 regrename_optimize ();
3538 close_dump_file (DFI_rnreg, print_rtl_with_bb, insns);
3539 timevar_pop (TV_RENAME_REGISTERS);
3542 #ifdef INSN_SCHEDULING
3543 if (optimize > 0 && flag_schedule_insns_after_reload)
3545 timevar_push (TV_SCHED2);
3546 open_dump_file (DFI_sched2, decl);
3548 /* Do control and data sched analysis again,
3549 and write some more of the results to dump file. */
3551 schedule_insns (rtl_dump_file);
3553 close_dump_file (DFI_sched2, print_rtl_with_bb, insns);
3554 timevar_pop (TV_SCHED2);
3560 #ifdef LEAF_REGISTERS
3561 current_function_uses_only_leaf_regs
3562 = optimize > 0 && only_leaf_regs_used () && leaf_function_p ();
3565 if (optimize > 0 && flag_reorder_blocks)
3567 timevar_push (TV_REORDER_BLOCKS);
3568 open_dump_file (DFI_bbro, decl);
3570 reorder_basic_blocks ();
3572 close_dump_file (DFI_bbro, print_rtl_with_bb, insns);
3573 timevar_pop (TV_REORDER_BLOCKS);
3576 /* One more attempt to remove jumps to .+1 left by dead-store elimination.
3577 Also do cross-jumping this time and delete no-op move insns. */
3581 timevar_push (TV_JUMP);
3582 open_dump_file (DFI_jump2, decl);
3584 jump_optimize (insns, JUMP_CROSS_JUMP, JUMP_NOOP_MOVES,
3585 !JUMP_AFTER_REGSCAN);
3587 /* CFG no longer kept up to date. */
3589 close_dump_file (DFI_jump2, print_rtl_with_bb, insns);
3590 timevar_pop (TV_JUMP);
3593 /* If a machine dependent reorganization is needed, call it. */
3594 #ifdef MACHINE_DEPENDENT_REORG
3595 open_dump_file (DFI_mach, decl);
3597 MACHINE_DEPENDENT_REORG (insns);
3599 close_dump_file (DFI_mach, print_rtl_with_bb, insns);
3604 /* If a scheduling pass for delayed branches is to be done,
3605 call the scheduling code. */
3608 if (optimize > 0 && flag_delayed_branch)
3610 timevar_push (TV_DBR_SCHED);
3611 open_dump_file (DFI_dbr, decl);
3613 dbr_schedule (insns, rtl_dump_file);
3615 close_dump_file (DFI_dbr, print_rtl_with_bb, insns);
3616 timevar_pop (TV_DBR_SCHED);
3622 /* Shorten branches.
3624 Note this must run before reg-stack because of death note (ab)use
3625 in the ia32 backend. */
3626 timevar_push (TV_SHORTEN_BRANCH);
3627 shorten_branches (get_insns ());
3628 timevar_pop (TV_SHORTEN_BRANCH);
3631 timevar_push (TV_REG_STACK);
3632 open_dump_file (DFI_stack, decl);
3634 reg_to_stack (insns, rtl_dump_file);
3636 close_dump_file (DFI_stack, print_rtl_with_bb, insns);
3637 timevar_pop (TV_REG_STACK);
3642 current_function_nothrow = nothrow_function_p ();
3643 if (current_function_nothrow)
3644 /* Now we know that this can't throw; set the flag for the benefit
3645 of other functions later in this translation unit. */
3646 TREE_NOTHROW (current_function_decl) = 1;
3648 /* Now turn the rtl into assembler code. */
3650 timevar_push (TV_FINAL);
3655 /* Get the function's name, as described by its RTL. This may be
3656 different from the DECL_NAME name used in the source file. */
3658 x = DECL_RTL (decl);
3659 if (GET_CODE (x) != MEM)
3662 if (GET_CODE (x) != SYMBOL_REF)
3664 fnname = XSTR (x, 0);
3666 assemble_start_function (decl, fnname);
3667 final_start_function (insns, asm_out_file, optimize);
3668 final (insns, asm_out_file, optimize, 0);
3669 final_end_function (insns, asm_out_file, optimize);
3670 assemble_end_function (decl, fnname);
3672 fflush (asm_out_file);
3674 /* Release all memory allocated by flow. */
3675 free_basic_block_vars (0);
3677 /* Release all memory held by regsets now. */
3678 regset_release_memory ();
3680 timevar_pop (TV_FINAL);
3684 /* Write DBX symbols if requested. */
3686 /* Note that for those inline functions where we don't initially
3687 know for certain that we will be generating an out-of-line copy,
3688 the first invocation of this routine (rest_of_compilation) will
3689 skip over this code by doing a `goto exit_rest_of_compilation;'.
3690 Later on, finish_compilation will call rest_of_compilation again
3691 for those inline functions that need to have out-of-line copies
3692 generated. During that call, we *will* be routed past here. */
3694 timevar_push (TV_SYMOUT);
3695 #ifdef DBX_DEBUGGING_INFO
3696 if (write_symbols == DBX_DEBUG)
3697 dbxout_function (decl);
3700 #ifdef DWARF_DEBUGGING_INFO
3701 if (write_symbols == DWARF_DEBUG)
3702 dwarfout_file_scope_decl (decl, 0);
3705 #ifdef DWARF2_DEBUGGING_INFO
3706 if (write_symbols == DWARF2_DEBUG)
3707 dwarf2out_decl (decl);
3709 timevar_pop (TV_SYMOUT);
3711 exit_rest_of_compilation:
3713 /* In case the function was not output,
3714 don't leave any temporary anonymous types
3715 queued up for sdb output. */
3716 #ifdef SDB_DEBUGGING_INFO
3717 if (write_symbols == SDB_DEBUG)
3718 sdbout_types (NULL_TREE);
3721 reload_completed = 0;
3722 flow2_completed = 0;
3725 timevar_push (TV_FINAL);
3727 /* Clear out the insn_length contents now that they are no
3729 init_insn_lengths ();
3731 /* Clear out the real_constant_chain before some of the rtx's
3732 it runs through become garbage. */
3733 clear_const_double_mem ();
3735 /* Show no temporary slots allocated. */
3738 free_basic_block_vars (0);
3740 timevar_pop (TV_FINAL);
3742 /* Make sure volatile mem refs aren't considered valid operands for
3743 arithmetic insns. We must call this here if this is a nested inline
3744 function, since the above code leaves us in the init_recog state
3745 (from final.c), and the function context push/pop code does not
3746 save/restore volatile_ok.
3748 ??? Maybe it isn't necessary for expand_start_function to call this
3749 anymore if we do it here? */
3751 init_recog_no_volatile ();
3753 /* We're done with this function. Free up memory if we can. */
3754 free_after_parsing (cfun);
3755 if (! DECL_DEFER_OUTPUT (decl))
3756 free_after_compilation (cfun);
3761 timevar_pop (TV_REST_OF_COMPILATION);
3772 printf (_("Usage: %s input [switches]\n"), progname);
3773 printf (_("Switches:\n"));
3775 printf (_(" -ffixed-<register> Mark <register> as being unavailable to the compiler\n"));
3776 printf (_(" -fcall-used-<register> Mark <register> as being corrupted by function calls\n"));
3777 printf (_(" -fcall-saved-<register> Mark <register> as being preserved across functions\n"));
3778 printf (_(" -finline-limit=<number> Limits the size of inlined functions to <number>\n"));
3779 printf (_(" -fmessage-length=<number> Limits diagnostics messages lengths to <number> characters per line. 0 suppresses line-wrapping\n"));
3780 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"));
3782 for (i = ARRAY_SIZE (f_options); i--;)
3784 const char *description = f_options[i].description;
3786 if (description != NULL && * description != 0)
3787 printf (" -f%-21s %s\n",
3788 f_options[i].string, description);
3791 printf (_(" -O[number] Set optimisation level to [number]\n"));
3792 printf (_(" -Os Optimise for space rather than speed\n"));
3793 printf (_(" -pedantic Issue warnings needed by strict compliance to ISO C\n"));
3794 printf (_(" -pedantic-errors Like -pedantic except that errors are produced\n"));
3795 printf (_(" -w Suppress warnings\n"));
3796 printf (_(" -W Enable extra warnings\n"));
3798 for (i = ARRAY_SIZE (W_options); i--;)
3800 const char *description = W_options[i].description;
3802 if (description != NULL && * description != 0)
3803 printf (" -W%-21s %s\n",
3804 W_options[i].string, description);
3807 printf (_(" -Wunused Enable unused warnings\n"));
3808 printf (_(" -Wid-clash-<num> Warn if 2 identifiers have the same first <num> chars\n"));
3809 printf (_(" -Wlarger-than-<number> Warn if an object is larger than <number> bytes\n"));
3810 printf (_(" -p Enable function profiling\n"));
3811 #if defined (BLOCK_PROFILER) || defined (FUNCTION_BLOCK_PROFILER)
3812 printf (_(" -a Enable block profiling \n"));
3814 #if defined (BLOCK_PROFILER) || defined (FUNCTION_BLOCK_PROFILER) || defined FUNCTION_BLOCK_PROFILER_EXIT
3815 printf (_(" -ax Enable jump profiling \n"));
3817 printf (_(" -o <file> Place output into <file> \n"));
3819 -G <number> Put global and static data smaller than <number>\n\
3820 bytes into a special section (on some targets)\n"));
3822 for (i = ARRAY_SIZE (debug_args); i--;)
3824 if (debug_args[i].description != NULL)
3825 printf (" -g%-21s %s\n",
3826 debug_args[i].arg, debug_args[i].description);
3829 printf (_(" -aux-info <file> Emit declaration info into <file>.X\n"));
3830 printf (_(" -quiet Do not display functions compiled or elapsed time\n"));
3831 printf (_(" -version Display the compiler's version\n"));
3832 printf (_(" -d[letters] Enable dumps from specific passes of the compiler\n"));
3833 printf (_(" -dumpbase <file> Base name to be used for dumps from specific passes\n"));
3834 #if defined INSN_SCHEDULING
3835 printf (_(" -fsched-verbose=<number> Set the verbosity level of the scheduler\n"));
3837 printf (_(" --help Display this information\n"));
3842 /* Display descriptions of language specific options.
3843 If there is no description, note that there is an undocumented option.
3844 If the description is empty, do not display anything. (This allows
3845 options to be deliberately undocumented, for whatever reason).
3846 If the option string is missing, then this is a marker, indicating
3847 that the description string is in fact the name of a language, whose
3848 language specific options are to follow. */
3850 if (ARRAY_SIZE (documented_lang_options) > 1)
3852 printf (_("\nLanguage specific options:\n"));
3854 for (i = 0; i < ARRAY_SIZE (documented_lang_options); i++)
3856 const char *description = documented_lang_options[i].description;
3857 const char *option = documented_lang_options[i].option;
3859 if (description == NULL)
3864 printf (_(" %-23.23s [undocumented]\n"), option);
3866 else if (*description == 0)
3868 else if (option == NULL)
3872 (_("\nThere are undocumented %s specific options as well.\n"),
3876 printf (_("\n Options for %s:\n"), description);
3881 printf (" %-23.23s %s\n", option, description);
3886 printf (_("\nThere are undocumented %s specific options as well.\n"),
3889 if (ARRAY_SIZE (target_switches) > 1
3890 #ifdef TARGET_OPTIONS
3891 || ARRAY_SIZE (target_options) > 1
3899 printf (_("\nTarget specific options:\n"));
3901 for (i = ARRAY_SIZE (target_switches); i--;)
3903 const char *option = target_switches[i].name;
3904 const char *description = target_switches[i].description;
3906 if (option == NULL || *option == 0)
3908 else if (description == NULL)
3913 printf (_(" -m%-21.21s [undocumented]\n"), option);
3915 else if (* description != 0)
3916 doc += printf (" -m%-21.21s %s\n", option, description);
3919 #ifdef TARGET_OPTIONS
3920 for (i = ARRAY_SIZE (target_options); i--;)
3922 const char *option = target_options[i].prefix;
3923 const char *description = target_options[i].description;
3925 if (option == NULL || *option == 0)
3927 else if (description == NULL)
3932 printf (_(" -m%-21.21s [undocumented]\n"), option);
3934 else if (* description != 0)
3935 doc += printf (" -m%-21.21s %s\n", option, description);
3941 printf (_("\nThere are undocumented target specific options as well.\n"));
3943 printf (_(" They exist, but they are not documented.\n"));
3948 /* Parse a -d... comand line switch. */
3951 decode_d_option (arg)
3960 for (i = 0; i < DFI_MAX; ++i)
3961 dump_file[i].enabled = 1;
3970 flag_print_asm_name = 1;
3973 flag_dump_rtl_in_asm = 1;
3974 flag_print_asm_name = 1;
3977 graph_dump_format = vcg;
3980 rtl_dump_and_exit = 1;
3985 case 'D': /* These are handled by the preprocessor. */
3991 for (i = 0; i < DFI_MAX; ++i)
3992 if (c == dump_file[i].debug_switch)
3994 dump_file[i].enabled = 1;
3999 warning ("unrecognized gcc debugging option: %c", c);
4004 /* Parse a -f... comand line switch. ARG is the value after the -f.
4005 It is safe to access 'ARG - 2' to generate the full switch name.
4006 Return the number of strings consumed. */
4009 decode_f_option (arg)
4013 const char *option_value = NULL;
4015 /* Search for the option in the table of binary f options. */
4016 for (j = ARRAY_SIZE (f_options); j--;)
4018 if (!strcmp (arg, f_options[j].string))
4020 *f_options[j].variable = f_options[j].on_value;
4024 if (arg[0] == 'n' && arg[1] == 'o' && arg[2] == '-'
4025 && ! strcmp (arg + 3, f_options[j].string))
4027 *f_options[j].variable = ! f_options[j].on_value;
4032 if ((option_value = skip_leading_substring (arg, "inline-limit-"))
4033 || (option_value = skip_leading_substring (arg, "inline-limit=")))
4035 read_integral_parameter (option_value, arg - 2, inline_max_insns);
4036 #ifdef INSN_SCHEDULING
4037 else if ((option_value = skip_leading_substring (arg, "sched-verbose=")))
4038 fix_sched_param ("verbose", option_value);
4040 else if ((option_value = skip_leading_substring (arg, "fixed-")))
4041 fix_register (option_value, 1, 1);
4042 else if ((option_value = skip_leading_substring (arg, "call-used-")))
4043 fix_register (option_value, 0, 1);
4044 else if ((option_value = skip_leading_substring (arg, "call-saved-")))
4045 fix_register (option_value, 0, 0);
4046 else if ((option_value = skip_leading_substring (arg, "align-loops=")))
4047 align_loops = read_integral_parameter (option_value, arg - 2, align_loops);
4048 else if ((option_value = skip_leading_substring (arg, "align-functions=")))
4050 = read_integral_parameter (option_value, arg - 2, align_functions);
4051 else if ((option_value = skip_leading_substring (arg, "align-jumps=")))
4052 align_jumps = read_integral_parameter (option_value, arg - 2, align_jumps);
4053 else if ((option_value = skip_leading_substring (arg, "align-labels=")))
4055 = read_integral_parameter (option_value, arg - 2, align_labels);
4056 else if ((option_value
4057 = skip_leading_substring (arg, "stack-limit-register=")))
4059 int reg = decode_reg_name (option_value);
4061 error ("unrecognized register name `%s'", option_value);
4063 stack_limit_rtx = gen_rtx_REG (Pmode, reg);
4065 else if ((option_value
4066 = skip_leading_substring (arg, "stack-limit-symbol=")))
4069 nm = ggc_strdup (option_value);
4070 stack_limit_rtx = gen_rtx_SYMBOL_REF (Pmode, nm);
4072 else if ((option_value
4073 = skip_leading_substring (arg, "message-length=")))
4074 diagnostic_message_length_per_line =
4075 read_integral_parameter (option_value, arg - 2,
4076 diagnostic_message_length_per_line);
4077 else if ((option_value
4078 = skip_leading_substring (arg, "diagnostics-show-location=")))
4080 if (!strcmp (option_value, "once"))
4081 set_message_prefixing_rule (DIAGNOSTICS_SHOW_PREFIX_ONCE);
4082 else if (!strcmp (option_value, "every-line"))
4083 set_message_prefixing_rule (DIAGNOSTICS_SHOW_PREFIX_EVERY_LINE);
4085 error ("Unrecognized option `%s'", arg - 2);
4087 else if (!strcmp (arg, "no-stack-limit"))
4088 stack_limit_rtx = NULL_RTX;
4089 else if (!strcmp (arg, "preprocessed"))
4090 /* Recognise this switch but do nothing. This prevents warnings
4091 about an unrecognized switch if cpplib has not been linked in. */
4099 /* Parse a -W... comand line switch. ARG is the value after the -W.
4100 It is safe to access 'ARG - 2' to generate the full switch name.
4101 Return the number of strings consumed. */
4104 decode_W_option (arg)
4107 const char *option_value = NULL;
4110 /* Search for the option in the table of binary W options. */
4112 for (j = ARRAY_SIZE (W_options); j--;)
4114 if (!strcmp (arg, W_options[j].string))
4116 *W_options[j].variable = W_options[j].on_value;
4120 if (arg[0] == 'n' && arg[1] == 'o' && arg[2] == '-'
4121 && ! strcmp (arg + 3, W_options[j].string))
4123 *W_options[j].variable = ! W_options[j].on_value;
4128 if ((option_value = skip_leading_substring (arg, "id-clash-")))
4130 id_clash_len = read_integral_parameter (option_value, arg - 2, -1);
4132 if (id_clash_len != -1)
4135 else if ((option_value = skip_leading_substring (arg, "larger-than-")))
4137 larger_than_size = read_integral_parameter (option_value, arg - 2, -1);
4139 if (larger_than_size != -1)
4140 warn_larger_than = 1;
4142 else if (!strcmp (arg, "unused"))
4146 else if (!strcmp (arg, "no-unused"))
4156 /* Parse a -g... comand line switch. ARG is the value after the -g.
4157 It is safe to access 'ARG - 2' to generate the full switch name.
4158 Return the number of strings consumed. */
4161 decode_g_option (arg)
4165 /* A lot of code assumes write_symbols == NO_DEBUG if the
4166 debugging level is 0 (thus -gstabs1 -gstabs0 would lose track
4167 of what debugging type has been selected). This records the
4168 selected type. It is an error to specify more than one
4170 static enum debug_info_type selected_debug_type = NO_DEBUG;
4171 /* Non-zero if debugging format has been explicitly set.
4172 -g and -ggdb don't explicitly set the debugging format so
4173 -gdwarf -g3 is equivalent to -gdwarf3. */
4174 static int type_explicitly_set_p = 0;
4175 /* Indexed by enum debug_info_type. */
4176 static const char *debug_type_names[] =
4178 "none", "stabs", "coff", "dwarf-1", "dwarf-2", "xcoff"
4181 /* The maximum admissible debug level value. */
4182 static const unsigned max_debug_level = 3;
4184 /* Look up ARG in the table. */
4185 for (da = debug_args; da->arg; da++)
4187 const int da_len = strlen (da->arg);
4189 if (da_len == 0 || ! strncmp (arg, da->arg, da_len))
4191 enum debug_info_type type = da->debug_type;
4192 const char *p = arg + da_len;
4194 if (*p && (*p < '0' || *p > '9'))
4197 /* A debug flag without a level defaults to level 2.
4198 Note we do not want to call read_integral_parameter
4199 for that case since it will call atoi which
4202 ??? We may want to generalize the interface to
4203 read_integral_parameter to better handle this case
4204 if this case shows up often. */
4206 level = read_integral_parameter (p, 0, max_debug_level + 1);
4210 if (da_len > 1 && *p && !strncmp (arg, "dwarf", da_len))
4212 error ("use -gdwarf -g%d for DWARF v1, level %d",
4215 error ("use -gdwarf-2 for DWARF v2");
4218 if (level > max_debug_level)
4221 ignoring option `%s' due to invalid debug level specification",
4223 level = debug_info_level;
4226 if (type == NO_DEBUG)
4228 type = PREFERRED_DEBUGGING_TYPE;
4230 if (da_len > 1 && strncmp (arg, "gdb", da_len) == 0)
4232 #if defined (DWARF2_DEBUGGING_INFO) && !defined (LINKER_DOES_NOT_WORK_WITH_DWARF2)
4233 type = DWARF2_DEBUG;
4235 #ifdef DBX_DEBUGGING_INFO
4242 if (type == NO_DEBUG)
4243 warning ("`%s': unknown or unsupported -g option", arg - 2);
4245 /* Does it conflict with an already selected type? */
4246 if (type_explicitly_set_p
4247 /* -g/-ggdb don't conflict with anything. */
4248 && da->debug_type != NO_DEBUG
4249 && type != selected_debug_type)
4250 warning ("`%s' ignored, conflicts with `-g%s'",
4251 arg - 2, debug_type_names[(int) selected_debug_type]);
4254 /* If the format has already been set, -g/-ggdb
4255 only change the debug level. */
4256 if (type_explicitly_set_p && da->debug_type == NO_DEBUG)
4257 /* Don't change debugging type. */
4261 selected_debug_type = type;
4262 type_explicitly_set_p = da->debug_type != NO_DEBUG;
4265 write_symbols = (level == 0
4267 : selected_debug_type);
4268 use_gnu_debug_info_extensions = da->use_extensions_p;
4269 debug_info_level = (enum debug_info_level) level;
4282 /* Decode the first argument in the argv as a language-independent option.
4283 Return the number of strings consumed. */
4286 independent_decode_option (argc, argv)
4290 char *arg = argv[0];
4292 if (arg[0] != '-' || arg[1] == 0)
4304 if (!strcmp (arg, "-help"))
4319 /* Already been treated in main (). Do nothing. */
4323 set_target_switch (arg + 1);
4327 return decode_f_option (arg + 1);
4330 return decode_g_option (arg + 1);
4333 if (!strcmp (arg, "dumpbase"))
4338 dump_base_name = argv[1];
4342 decode_d_option (arg + 1);
4346 if (!strcmp (arg, "pedantic"))
4348 else if (!strcmp (arg, "pedantic-errors"))
4349 flag_pedantic_errors = pedantic = 1;
4350 else if (arg[1] == 0)
4357 if (!strcmp (arg, "quiet"))
4364 if (!strcmp (arg, "version"))
4372 inhibit_warnings = 1;
4381 /* We save the value of warn_uninitialized, since if they put
4382 -Wuninitialized on the command line, we need to generate a
4383 warning about not using it without also specifying -O. */
4384 if (warn_uninitialized != 1)
4385 warn_uninitialized = 2;
4388 return decode_W_option (arg + 1);
4394 #if !defined (BLOCK_PROFILER) || !defined (FUNCTION_BLOCK_PROFILER)
4395 warning ("`-a' option (basic block profile) not supported");
4397 profile_block_flag = (profile_block_flag < 2) ? 1 : 3;
4400 else if (!strcmp (arg, "ax"))
4402 #if !defined (FUNCTION_BLOCK_PROFILER_EXIT) || !defined (BLOCK_PROFILER) || !defined (FUNCTION_BLOCK_PROFILER)
4403 warning ("`-ax' option (jump profiling) not supported");
4405 profile_block_flag = (!profile_block_flag
4406 || profile_block_flag == 2) ? 2 : 3;
4409 else if (!strncmp (arg, "aux-info", 8))
4411 flag_gen_aux_info = 1;
4417 aux_info_file_name = argv[1];
4421 aux_info_file_name = arg + 8;
4433 asm_file_name = argv[1];
4448 g_switch_val = read_integral_parameter (argv[1], 0, -1);
4453 g_switch_val = read_integral_parameter (arg + 1, 0, -1);
4457 if (g_switch_val == -1)
4461 g_switch_set = TRUE;
4462 g_switch_value = g_switch_val;
4472 /* Entry point of cc1/c++. Decode command args, then call compile_file.
4473 Exit code is 35 if can't open files, 34 if fatal error,
4474 33 if had nonfatal errors, else success. */
4476 extern int main PARAMS ((int, char **));
4486 /* save in case md file wants to emit args as a comment. */
4490 p = argv[0] + strlen (argv[0]);
4491 while (p != argv[0] && !IS_DIR_SEPARATOR (p[-1]))
4495 #ifdef HAVE_LC_MESSAGES
4496 setlocale (LC_MESSAGES, "");
4498 (void) bindtextdomain (PACKAGE, localedir);
4499 (void) textdomain (PACKAGE);
4501 /* Install handler for SIGFPE, which may be received while we do
4502 compile-time floating point arithmetic. */
4503 signal (SIGFPE, float_signal);
4505 /* Trap fatal signals, e.g. SIGSEGV, and convert them to ICE messages. */
4507 signal (SIGSEGV, crash_signal);
4510 signal (SIGILL, crash_signal);
4513 signal (SIGBUS, crash_signal);
4516 signal (SIGABRT, crash_signal);
4518 #if defined SIGIOT && (!defined SIGABRT || SIGABRT != SIGIOT)
4519 signal (SIGIOT, crash_signal);
4522 decl_printable_name = decl_name;
4523 lang_expand_expr = (lang_expand_expr_t) do_abort;
4525 /* Initialize whether `char' is signed. */
4526 flag_signed_char = DEFAULT_SIGNED_CHAR;
4527 #ifdef DEFAULT_SHORT_ENUMS
4528 /* Initialize how much space enums occupy, by default. */
4529 flag_short_enums = DEFAULT_SHORT_ENUMS;
4532 /* Initialize the garbage-collector. */
4534 ggc_add_root (&input_file_stack, 1, sizeof input_file_stack,
4536 ggc_add_rtx_root (&stack_limit_rtx, 1);
4537 ggc_add_tree_root (¤t_function_decl, 1);
4538 ggc_add_tree_root (¤t_function_func_begin_label, 1);
4540 /* Initialize the diagnostics reporting machinery. */
4541 initialize_diagnostics ();
4543 /* Perform language-specific options intialization. */
4544 lang_init_options ();
4546 /* Scan to see what optimization level has been specified. That will
4547 determine the default value of many flags. */
4548 for (i = 1; i < argc; i++)
4550 if (!strcmp (argv[i], "-O"))
4555 else if (argv[i][0] == '-' && argv[i][1] == 'O')
4557 /* Handle -Os, -O2, -O3, -O69, ... */
4558 char *p = &argv[i][2];
4560 if ((p[0] == 's') && (p[1] == 0))
4564 /* Optimizing for size forces optimize to be 2. */
4569 const int optimize_val = read_integral_parameter (p, p - 2, -1);
4570 if (optimize_val != -1)
4572 optimize = optimize_val;
4582 flag_thread_jumps = 1;
4584 flag_delayed_branch = 1;
4586 #ifdef CAN_DEBUG_WITHOUT_FP
4587 flag_omit_frame_pointer = 1;
4593 flag_optimize_sibling_calls = 1;
4594 flag_cse_follow_jumps = 1;
4595 flag_cse_skip_blocks = 1;
4597 flag_expensive_optimizations = 1;
4598 flag_strength_reduce = 1;
4599 flag_rerun_cse_after_loop = 1;
4600 flag_rerun_loop_opt = 1;
4601 flag_caller_saves = 1;
4604 #ifdef INSN_SCHEDULING
4605 flag_schedule_insns = 1;
4606 flag_schedule_insns_after_reload = 1;
4609 flag_strict_aliasing = 1;
4610 flag_delete_null_pointer_checks = 1;
4611 flag_reorder_blocks = 1;
4616 flag_inline_functions = 1;
4619 if (optimize < 2 || optimize_size)
4624 align_functions = 1;
4627 /* Initialize target_flags before OPTIMIZATION_OPTIONS so the latter can
4630 set_target_switch ("");
4632 /* Unwind tables are always present in an ABI-conformant IA-64
4633 object file, so the default should be ON. */
4634 #ifdef IA64_UNWIND_INFO
4635 flag_unwind_tables = IA64_UNWIND_INFO;
4638 #ifdef OPTIMIZATION_OPTIONS
4639 /* Allow default optimizations to be specified on a per-machine basis. */
4640 OPTIMIZATION_OPTIONS (optimize, optimize_size);
4643 /* Initialize register usage now so switches may override. */
4646 /* Perform normal command line switch decoding. */
4647 for (i = 1; i < argc;)
4649 unsigned int lang_processed;
4650 unsigned int indep_processed;
4652 /* Give the language a chance to decode the option for itself. */
4653 lang_processed = lang_decode_option (argc - i, argv + i);
4655 /* Now see if the option also has a language independent meaning.
4656 Some options are both language specific and language independent,
4658 indep_processed = independent_decode_option (argc - i, argv + i);
4660 if (lang_processed || indep_processed)
4661 i += MAX (lang_processed, indep_processed);
4664 const char *option = NULL;
4665 const char *lang = NULL;
4668 /* It is possible that the command line switch is not valid for the
4669 current language, but it is valid for another language. In order
4670 to be compatible with previous versions of the compiler (which
4671 did not issue an error message in this case) we check for this
4672 possibility here. If we do find a match, then if extra_warnings
4673 is set we generate a warning message, otherwise we will just
4674 ignore the option. */
4675 for (j = 0; j < ARRAY_SIZE (documented_lang_options); j++)
4677 option = documented_lang_options[j].option;
4680 lang = documented_lang_options[j].description;
4681 else if (! strncmp (argv[i], option, strlen (option)))
4685 if (j != ARRAY_SIZE (documented_lang_options))
4689 warning ("Ignoring command line option '%s'", argv[i]);
4692 ("(It is valid for %s but not the selected language)",
4696 else if (argv[i][0] == '-' && argv[i][1] == 'g')
4697 warning ("`%s': unknown or unsupported -g option", &argv[i][2]);
4699 error ("Unrecognized option `%s'", argv[i]);
4705 /* Reflect any language-specific diagnostic option setting. */
4706 reshape_diagnostic_buffer ();
4708 /* Checker uses the frame pointer. */
4709 if (flag_check_memory_usage)
4710 flag_omit_frame_pointer = 0;
4714 /* Inlining does not work if not optimizing,
4715 so force it not to be done. */
4719 /* The c_decode_option and lang_decode_option functions set
4720 this to `2' if -Wall is used, so we can avoid giving out
4721 lots of errors for people who don't realize what -Wall does. */
4722 if (warn_uninitialized == 1)
4723 warning ("-Wuninitialized is not supported without -O");
4726 #ifdef OVERRIDE_OPTIONS
4727 /* Some machines may reject certain combinations of options. */
4731 if (exceptions_via_longjmp == 2)
4733 #ifdef DWARF2_UNWIND_INFO
4734 exceptions_via_longjmp = ! DWARF2_UNWIND_INFO;
4736 #ifdef IA64_UNWIND_INFO
4737 exceptions_via_longjmp = ! IA64_UNWIND_INFO;
4739 exceptions_via_longjmp = 1;
4744 /* Since each function gets its own handler data, we can't support the
4745 new model currently, since it depend on a specific rethrow label
4746 which is declared at the front of the table, and we can only
4747 have one such symbol in a file. */
4748 #ifdef IA64_UNWIND_INFO
4749 flag_new_exceptions = 0;
4752 /* Set up the align_*_log variables, defaulting them to 1 if they
4753 were still unset. */
4754 if (align_loops <= 0) align_loops = 1;
4755 align_loops_log = floor_log2 (align_loops * 2 - 1);
4756 if (align_jumps <= 0) align_jumps = 1;
4757 align_jumps_log = floor_log2 (align_jumps * 2 - 1);
4758 if (align_labels <= 0) align_labels = 1;
4759 align_labels_log = floor_log2 (align_labels * 2 - 1);
4760 if (align_functions <= 0) align_functions = 1;
4761 align_functions_log = floor_log2 (align_functions * 2 - 1);
4763 if (profile_block_flag == 3)
4765 warning ("`-ax' and `-a' are conflicting options. `-a' ignored.");
4766 profile_block_flag = 2;
4769 /* Unrolling all loops implies that standard loop unrolling must also
4771 if (flag_unroll_all_loops)
4772 flag_unroll_loops = 1;
4773 /* Loop unrolling requires that strength_reduction be on also. Silently
4774 turn on strength reduction here if it isn't already on. Also, the loop
4775 unrolling code assumes that cse will be run after loop, so that must
4776 be turned on also. */
4777 if (flag_unroll_loops)
4779 flag_strength_reduce = 1;
4780 flag_rerun_cse_after_loop = 1;
4783 /* Warn about options that are not supported on this machine. */
4784 #ifndef INSN_SCHEDULING
4785 if (flag_schedule_insns || flag_schedule_insns_after_reload)
4786 warning ("instruction scheduling not supported on this target machine");
4789 if (flag_delayed_branch)
4790 warning ("this target machine does not have delayed branches");
4793 user_label_prefix = USER_LABEL_PREFIX;
4794 if (flag_leading_underscore != -1)
4796 /* If the default prefix is more complicated than "" or "_",
4797 issue a warning and ignore this option. */
4798 if (user_label_prefix[0] == 0 ||
4799 (user_label_prefix[0] == '_' && user_label_prefix[1] == 0))
4801 user_label_prefix = flag_leading_underscore ? "_" : "";
4804 warning ("-f%sleading-underscore not supported on this target machine",
4805 flag_leading_underscore ? "" : "no-");
4808 /* If we are in verbose mode, write out the version and maybe all the
4809 option flags in use. */
4812 print_version (stderr, "");
4814 print_switch_values (stderr, 0, MAX_LINE, "", " ", "\n");
4817 compile_file (filename);
4819 #if !defined(OS2) && !defined(VMS) && (!defined(_WIN32) || defined (__CYGWIN__)) && !defined(__INTERIX)
4822 char *lim = (char *) sbrk (0);
4824 fnotice (stderr, "Data size %ld.\n", (long) (lim - (char *) &environ));
4829 system ("ps -l 1>&2");
4832 #endif /* not USG */
4835 #endif /* ! OS2 && ! VMS && (! _WIN32 || CYGWIN) && ! __INTERIX */
4838 return (FATAL_EXIT_CODE);
4840 return (FATAL_EXIT_CODE);
4841 return (SUCCESS_EXIT_CODE);
4844 /* Decode -m switches. */
4845 /* Decode the switch -mNAME. */
4848 set_target_switch (name)
4852 int valid_target_option = 0;
4854 for (j = 0; j < ARRAY_SIZE (target_switches); j++)
4855 if (!strcmp (target_switches[j].name, name))
4857 if (target_switches[j].value < 0)
4858 target_flags &= ~-target_switches[j].value;
4860 target_flags |= target_switches[j].value;
4861 valid_target_option = 1;
4864 #ifdef TARGET_OPTIONS
4865 if (!valid_target_option)
4866 for (j = 0; j < ARRAY_SIZE (target_options); j++)
4868 int len = strlen (target_options[j].prefix);
4869 if (!strncmp (target_options[j].prefix, name, len))
4871 *target_options[j].variable = name + len;
4872 valid_target_option = 1;
4877 if (!valid_target_option)
4878 error ("Invalid option `%s'", name);
4881 /* Print version information to FILE.
4882 Each line begins with INDENT (for the case where FILE is the
4883 assembler output file). */
4886 print_version (file, indent)
4891 #define __VERSION__ "[?]"
4895 "%s%s%s version %s (%s) compiled by GNU C version %s.\n"
4897 "%s%s%s version %s (%s) compiled by CC.\n"
4899 , indent, *indent != 0 ? " " : "",
4900 language_string, version_string, TARGET_NAME, __VERSION__);
4903 /* Print an option value and return the adjusted position in the line.
4904 ??? We don't handle error returns from fprintf (disk full); presumably
4905 other code will catch a disk full though. */
4908 print_single_switch (file, pos, max, indent, sep, term, type, name)
4911 const char *indent, *sep, *term, *type, *name;
4913 /* The ultrix fprintf returns 0 on success, so compute the result we want
4914 here since we need it for the following test. */
4915 int len = strlen (sep) + strlen (type) + strlen (name);
4920 fprintf (file, "%s", term);
4925 fprintf (file, "%s", indent);
4926 pos = strlen (indent);
4928 fprintf (file, "%s%s%s", sep, type, name);
4933 /* Print active target switches to FILE.
4934 POS is the current cursor position and MAX is the size of a "line".
4935 Each line begins with INDENT and ends with TERM.
4936 Each switch is separated from the next by SEP. */
4939 print_switch_values (file, pos, max, indent, sep, term)
4942 const char *indent, *sep, *term;
4947 /* Print the options as passed. */
4949 pos = print_single_switch (file, pos, max, indent, *indent ? " " : "", term,
4950 _("options passed: "), "");
4952 for (p = &save_argv[1]; *p != NULL; p++)
4956 if (strcmp (*p, "-o") == 0)
4962 if (strcmp (*p, "-quiet") == 0)
4964 if (strcmp (*p, "-version") == 0)
4969 pos = print_single_switch (file, pos, max, indent, sep, term, *p, "");
4972 fprintf (file, "%s", term);
4974 /* Print the -f and -m options that have been enabled.
4975 We don't handle language specific options but printing argv
4978 pos = print_single_switch (file, 0, max, indent, *indent ? " " : "", term,
4979 _("options enabled: "), "");
4981 for (j = 0; j < ARRAY_SIZE (f_options); j++)
4982 if (*f_options[j].variable == f_options[j].on_value)
4983 pos = print_single_switch (file, pos, max, indent, sep, term,
4984 "-f", f_options[j].string);
4986 /* Print target specific options. */
4988 for (j = 0; j < ARRAY_SIZE (target_switches); j++)
4989 if (target_switches[j].name[0] != '\0'
4990 && target_switches[j].value > 0
4991 && ((target_switches[j].value & target_flags)
4992 == target_switches[j].value))
4994 pos = print_single_switch (file, pos, max, indent, sep, term,
4995 "-m", target_switches[j].name);
4998 #ifdef TARGET_OPTIONS
4999 for (j = 0; j < ARRAY_SIZE (target_options); j++)
5000 if (*target_options[j].variable != NULL)
5003 sprintf (prefix, "-m%s", target_options[j].prefix);
5004 pos = print_single_switch (file, pos, max, indent, sep, term,
5005 prefix, *target_options[j].variable);
5009 fprintf (file, "%s", term);
5012 /* Record the beginning of a new source file, named FILENAME. */
5015 debug_start_source_file (filename)
5016 register const char *filename ATTRIBUTE_UNUSED;
5018 #ifdef DBX_DEBUGGING_INFO
5019 if (write_symbols == DBX_DEBUG)
5020 dbxout_start_new_source_file (filename);
5022 #ifdef DWARF_DEBUGGING_INFO
5023 if (debug_info_level == DINFO_LEVEL_VERBOSE
5024 && write_symbols == DWARF_DEBUG)
5025 dwarfout_start_new_source_file (filename);
5026 #endif /* DWARF_DEBUGGING_INFO */
5027 #ifdef DWARF2_DEBUGGING_INFO
5028 if (write_symbols == DWARF2_DEBUG)
5029 dwarf2out_start_source_file (filename);
5030 #endif /* DWARF2_DEBUGGING_INFO */
5031 #ifdef SDB_DEBUGGING_INFO
5032 if (write_symbols == SDB_DEBUG)
5033 sdbout_start_new_source_file (filename);
5037 /* Record the resumption of a source file. LINENO is the line number in
5038 the source file we are returning to. */
5041 debug_end_source_file (lineno)
5042 register unsigned lineno ATTRIBUTE_UNUSED;
5044 #ifdef DBX_DEBUGGING_INFO
5045 if (write_symbols == DBX_DEBUG)
5046 dbxout_resume_previous_source_file ();
5048 #ifdef DWARF_DEBUGGING_INFO
5049 if (debug_info_level == DINFO_LEVEL_VERBOSE
5050 && write_symbols == DWARF_DEBUG)
5051 dwarfout_resume_previous_source_file (lineno);
5052 #endif /* DWARF_DEBUGGING_INFO */
5053 #ifdef DWARF2_DEBUGGING_INFO
5054 if (write_symbols == DWARF2_DEBUG)
5055 dwarf2out_end_source_file ();
5056 #endif /* DWARF2_DEBUGGING_INFO */
5057 #ifdef SDB_DEBUGGING_INFO
5058 if (write_symbols == SDB_DEBUG)
5059 sdbout_resume_previous_source_file ();
5063 /* Called from check_newline in c-parse.y. The `buffer' parameter contains
5064 the tail part of the directive line, i.e. the part which is past the
5065 initial whitespace, #, whitespace, directive-name, whitespace part. */
5068 debug_define (lineno, buffer)
5069 register unsigned lineno ATTRIBUTE_UNUSED;
5070 register char *buffer ATTRIBUTE_UNUSED;
5072 #ifdef DWARF_DEBUGGING_INFO
5073 if (debug_info_level == DINFO_LEVEL_VERBOSE
5074 && write_symbols == DWARF_DEBUG)
5075 dwarfout_define (lineno, buffer);
5076 #endif /* DWARF_DEBUGGING_INFO */
5077 #ifdef DWARF2_DEBUGGING_INFO
5078 if (debug_info_level == DINFO_LEVEL_VERBOSE
5079 && write_symbols == DWARF2_DEBUG)
5080 dwarf2out_define (lineno, buffer);
5081 #endif /* DWARF2_DEBUGGING_INFO */
5084 /* Called from check_newline in c-parse.y. The `buffer' parameter contains
5085 the tail part of the directive line, i.e. the part which is past the
5086 initial whitespace, #, whitespace, directive-name, whitespace part. */
5089 debug_undef (lineno, buffer)
5090 register unsigned lineno ATTRIBUTE_UNUSED;
5091 register char *buffer ATTRIBUTE_UNUSED;
5093 #ifdef DWARF_DEBUGGING_INFO
5094 if (debug_info_level == DINFO_LEVEL_VERBOSE
5095 && write_symbols == DWARF_DEBUG)
5096 dwarfout_undef (lineno, buffer);
5097 #endif /* DWARF_DEBUGGING_INFO */
5098 #ifdef DWARF2_DEBUGGING_INFO
5099 if (debug_info_level == DINFO_LEVEL_VERBOSE
5100 && write_symbols == DWARF2_DEBUG)
5101 dwarf2out_undef (lineno, buffer);
5102 #endif /* DWARF2_DEBUGGING_INFO */
5105 /* Returns nonzero if it is appropriate not to emit any debugging
5106 information for BLOCK, because it doesn't contain any instructions.
5107 This may not be the case for blocks containing nested functions, since
5108 we may actually call such a function even though the BLOCK information
5112 debug_ignore_block (block)
5113 tree block ATTRIBUTE_UNUSED;
5115 /* Never delete the BLOCK for the outermost scope
5116 of the function; we can refer to names from
5117 that scope even if the block notes are messed up. */
5118 if (is_body_block (block))
5121 #ifdef DWARF2_DEBUGGING_INFO
5122 if (write_symbols == DWARF2_DEBUG)
5123 return dwarf2out_ignore_block (block);