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"
57 #include "basic-block.h"
64 #ifndef ACCUMULATE_OUTGOING_ARGS
65 #define ACCUMULATE_OUTGOING_ARGS 0
68 #ifdef DWARF_DEBUGGING_INFO
72 #if defined (DWARF2_UNWIND_INFO) || defined (DWARF2_DEBUGGING_INFO)
73 #include "dwarf2out.h"
76 #if defined(DBX_DEBUGGING_INFO) || defined(XCOFF_DEBUGGING_INFO)
80 #ifdef SDB_DEBUGGING_INFO
84 #ifdef XCOFF_DEBUGGING_INFO
89 /* The extra parameters substantially improve the I/O performance. */
91 vms_fopen (fname
, type
)
95 /* The <stdio.h> in the gcc-vms-1.42 distribution prototypes fopen with two
96 fixed arguments, which matches ANSI's specification but not VAXCRTL's
97 pre-ANSI implementation. This hack circumvents the mismatch problem. */
98 FILE *(*vmslib_fopen
)() = (FILE *(*)()) fopen
;
101 return (*vmslib_fopen
) (fname
, type
, "mbc=32",
102 "deq=64", "fop=tef", "shr=nil");
104 return (*vmslib_fopen
) (fname
, type
, "mbc=32");
106 #define fopen vms_fopen
109 #ifndef DEFAULT_GDB_EXTENSIONS
110 #define DEFAULT_GDB_EXTENSIONS 1
113 /* If more than one debugging type is supported, you must define
114 PREFERRED_DEBUGGING_TYPE to choose a format in a system-dependent way.
116 This is one long line cause VAXC can't handle a \-newline. */
117 #if 1 < (defined (DBX_DEBUGGING_INFO) + defined (SDB_DEBUGGING_INFO) + defined (DWARF_DEBUGGING_INFO) + defined (DWARF2_DEBUGGING_INFO) + defined (XCOFF_DEBUGGING_INFO))
118 #ifndef PREFERRED_DEBUGGING_TYPE
119 You Lose
! You must define PREFERRED_DEBUGGING_TYPE
!
120 #endif /* no PREFERRED_DEBUGGING_TYPE */
121 #else /* Only one debugging format supported. Define PREFERRED_DEBUGGING_TYPE
122 so the following code needn't care. */
123 #ifdef DBX_DEBUGGING_INFO
124 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
126 #ifdef SDB_DEBUGGING_INFO
127 #define PREFERRED_DEBUGGING_TYPE SDB_DEBUG
129 #ifdef DWARF_DEBUGGING_INFO
130 #define PREFERRED_DEBUGGING_TYPE DWARF_DEBUG
132 #ifdef DWARF2_DEBUGGING_INFO
133 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
135 #ifdef XCOFF_DEBUGGING_INFO
136 #define PREFERRED_DEBUGGING_TYPE XCOFF_DEBUG
138 #endif /* More than one debugger format enabled. */
140 /* If still not defined, must have been because no debugging formats
142 #ifndef PREFERRED_DEBUGGING_TYPE
143 #define PREFERRED_DEBUGGING_TYPE NO_DEBUG
146 #ifdef NEED_DECLARATION_ENVIRON
147 extern char **environ
;
150 /* Carry information from ASM_DECLARE_OBJECT_NAME
151 to ASM_FINISH_DECLARE_OBJECT. */
153 extern int size_directive_output
;
154 extern tree last_assemble_variable_decl
;
156 static void set_target_switch
PARAMS ((const char *));
157 static const char *decl_name
PARAMS ((tree
, int));
159 static void float_signal
PARAMS ((int)) ATTRIBUTE_NORETURN
;
160 static void pipe_closed
PARAMS ((int)) ATTRIBUTE_NORETURN
;
161 #ifdef ASM_IDENTIFY_LANGUAGE
162 /* This might or might not be used in ASM_IDENTIFY_LANGUAGE. */
163 static void output_lang_identify
PARAMS ((FILE *)) ATTRIBUTE_UNUSED
;
165 static void compile_file
PARAMS ((char *));
166 static void display_help
PARAMS ((void));
167 static void mark_file_stack
PARAMS ((void *));
169 static void decode_d_option
PARAMS ((const char *));
170 static int decode_f_option
PARAMS ((const char *));
171 static int decode_W_option
PARAMS ((const char *));
172 static int decode_g_option
PARAMS ((const char *));
173 static unsigned int independent_decode_option
PARAMS ((int, char **,
176 static void print_version
PARAMS ((FILE *, const char *));
177 static int print_single_switch
PARAMS ((FILE *, int, int, const char *,
178 const char *, const char *,
179 const char *, const char *));
180 static void print_switch_values
PARAMS ((FILE *, int, int, const char *,
181 const char *, const char *));
183 /* Length of line when printing switch values. */
186 /* Name of program invoked, sans directories. */
188 const char *progname
;
190 /* Copy of arguments to main. */
194 /* Name of current original source file (what was input to cpp).
195 This comes from each #-command in the actual input. */
197 char *input_filename
;
199 /* Name of top-level original source file (what was input to cpp).
200 This comes from the #-command at the beginning of the actual input.
201 If there isn't any there, then this is the cc1 input file name. */
203 char *main_input_filename
;
205 /* Current line number in real source file. */
209 /* Nonzero if it is unsafe to create any new pseudo registers. */
212 /* Stack of currently pending input files. */
214 struct file_stack
*input_file_stack
;
216 /* Incremented on each change to input_file_stack. */
217 int input_file_stack_tick
;
219 /* Name to use as base of names for dump output files. */
221 const char *dump_base_name
;
223 /* Bit flags that specify the machine subtype we are compiling for.
224 Bits are tested using macros TARGET_... defined in the tm.h file
225 and set by `-m...' switches. Must be defined in rtlanal.c. */
227 extern int target_flags
;
229 /* Describes a dump file. */
231 struct dump_file_info
233 /* The unique extension to apply, e.g. ".jump". */
234 const char * const extension
;
236 /* The -d<c> character that enables this dump file. */
237 char const debug_switch
;
239 /* True if there is a corresponding graph dump file. */
240 char const graph_dump_p
;
242 /* True if the user selected this dump. */
245 /* True if the files have been initialized (ie truncated). */
249 /* Enumerate the extant dump files. */
282 /* Describes all the dump files. Should be kept in order of the
283 pass and in sync with dump_file_index above. */
285 struct dump_file_info dump_file
[DFI_MAX
] =
287 { "rtl", 'r', 0, 0, 0 },
288 { "sibling", 'i', 0, 0, 0 },
289 { "jump", 'j', 0, 0, 0 },
290 { "cse", 's', 0, 0, 0 },
291 { "addressof", 'F', 0, 0, 0 },
292 { "ssa", 'e', 1, 0, 0 },
293 { "ussa", 'e', 1, 0, 0 }, /* Yes, duplicate enable switch. */
294 { "gcse", 'G', 1, 0, 0 },
295 { "loop", 'L', 1, 0, 0 },
296 { "cse2", 't', 1, 0, 0 },
297 { "bp", 'b', 1, 0, 0 },
298 { "flow", 'f', 1, 0, 0 },
299 { "combine", 'c', 1, 0, 0 },
300 { "regmove", 'N', 1, 0, 0 },
301 { "sched", 'S', 1, 0, 0 },
302 { "lreg", 'l', 1, 0, 0 },
303 { "greg", 'g', 1, 0, 0 },
304 { "flow2", 'w', 1, 0, 0 },
305 { "peephole2", 'z', 1, 0, 0 },
306 { "sched2", 'R', 1, 0, 0 },
307 { "bbro", 'B', 1, 0, 0 },
308 { "rnreg", 'n', 1, 0, 0 },
309 { "jump2", 'J', 1, 0, 0 },
310 { "mach", 'M', 1, 0, 0 },
311 { "dbr", 'd', 0, 0, 0 },
312 { "stack", 'k', 1, 0, 0 },
315 static int open_dump_file
PARAMS ((enum dump_file_index
, tree
));
316 static void close_dump_file
PARAMS ((enum dump_file_index
,
317 void (*) (FILE *, rtx
), rtx
));
319 /* Other flags saying which kinds of debugging dump have been requested. */
321 int rtl_dump_and_exit
;
322 int flag_print_asm_name
;
323 static int flag_print_mem
;
324 static int version_flag
;
325 static char * filename
;
326 enum graph_dump_types graph_dump_format
;
328 /* Name for output file of assembly code, specified with -o. */
332 /* Value of the -G xx switch, and whether it was passed or not. */
336 /* Type(s) of debugging information we are producing (if any).
337 See flags.h for the definitions of the different possible
338 types of debugging information. */
339 enum debug_info_type write_symbols
= NO_DEBUG
;
341 /* Level of debugging information we are producing. See flags.h
342 for the definitions of the different possible levels. */
343 enum debug_info_level debug_info_level
= DINFO_LEVEL_NONE
;
345 /* Nonzero means use GNU-only extensions in the generated symbolic
346 debugging information. */
347 /* Currently, this only has an effect when write_symbols is set to
348 DBX_DEBUG, XCOFF_DEBUG, or DWARF_DEBUG. */
349 int use_gnu_debug_info_extensions
= 0;
351 /* Nonzero means do optimizations. -O.
352 Particular numeric values stand for particular amounts of optimization;
353 thus, -O2 stores 2 here. However, the optimizations beyond the basic
354 ones are not controlled directly by this variable. Instead, they are
355 controlled by individual `flag_...' variables that are defaulted
356 based on this variable. */
360 /* Nonzero means optimize for size. -Os.
361 The only valid values are zero and non-zero. When optimize_size is
362 non-zero, optimize defaults to 2, but certain individual code
363 bloating optimizations are disabled. */
365 int optimize_size
= 0;
367 /* Number of error messages and warning messages so far. */
370 int warningcount
= 0;
373 /* The FUNCTION_DECL for the function currently being compiled,
374 or 0 if between functions. */
375 tree current_function_decl
;
377 /* Set to the FUNC_BEGIN label of the current function, or NULL_TREE
379 tree current_function_func_begin_label
;
381 /* Pointer to function to compute the name to use to print a declaration.
382 DECL is the declaration in question.
383 VERBOSITY determines what information will be printed:
384 0: DECL_NAME, demangled as necessary.
385 1: and scope information.
386 2: and any other information that might be interesting, such as function
387 parameter types in C++. */
389 const char *(*decl_printable_name
) PARAMS ((tree
, int));
391 /* Pointer to function to compute rtl for a language-specific tree code. */
393 typedef rtx (*lang_expand_expr_t
)
394 PARAMS ((union tree_node
*, rtx
, enum machine_mode
,
395 enum expand_modifier modifier
));
397 lang_expand_expr_t lang_expand_expr
= 0;
399 tree (*lang_expand_constant
) PARAMS ((tree
)) = 0;
401 /* Pointer to function to finish handling an incomplete decl at the
402 end of compilation. */
404 void (*incomplete_decl_finalize_hook
) PARAMS ((tree
)) = 0;
406 /* Nonzero if generating code to do profiling. */
408 int profile_flag
= 0;
410 /* Nonzero if generating code to do profiling on a line-by-line basis. */
412 int profile_block_flag
;
414 /* Nonzero if generating code to profile program flow graph arcs. */
416 int profile_arc_flag
= 0;
418 /* Nonzero if generating info for gcov to calculate line test coverage. */
420 int flag_test_coverage
= 0;
422 /* Nonzero indicates that branch taken probabilities should be calculated. */
424 int flag_branch_probabilities
= 0;
426 /* Nonzero if basic blocks should be reordered. */
428 int flag_reorder_blocks
= 0;
430 /* Nonzero if registers should be renamed */
432 int flag_rename_registers
= 0;
434 /* Nonzero for -pedantic switch: warn about anything
435 that standard spec forbids. */
439 /* Temporarily suppress certain warnings.
440 This is set while reading code from a system header file. */
442 int in_system_header
= 0;
444 /* Don't print functions as they are compiled and don't print
445 times taken by the various passes. -quiet. */
451 /* Nonzero means `char' should be signed. */
453 int flag_signed_char
;
455 /* Nonzero means give an enum type only as many bytes as it needs. */
457 int flag_short_enums
;
459 /* Nonzero for -fcaller-saves: allocate values in regs that need to
460 be saved across function calls, if that produces overall better code.
461 Optional now, so people can test it. */
463 #ifdef DEFAULT_CALLER_SAVES
464 int flag_caller_saves
= 1;
466 int flag_caller_saves
= 0;
469 /* Nonzero if structures and unions should be returned in memory.
471 This should only be defined if compatibility with another compiler or
472 with an ABI is needed, because it results in slower code. */
474 #ifndef DEFAULT_PCC_STRUCT_RETURN
475 #define DEFAULT_PCC_STRUCT_RETURN 1
478 /* Nonzero for -fpcc-struct-return: return values the same way PCC does. */
480 int flag_pcc_struct_return
= DEFAULT_PCC_STRUCT_RETURN
;
482 /* Nonzero for -fforce-mem: load memory value into a register
483 before arithmetic on it. This makes better cse but slower compilation. */
485 int flag_force_mem
= 0;
487 /* Nonzero for -fforce-addr: load memory address into a register before
488 reference to memory. This makes better cse but slower compilation. */
490 int flag_force_addr
= 0;
492 /* Nonzero for -fdefer-pop: don't pop args after each function call;
493 instead save them up to pop many calls' args with one insns. */
495 int flag_defer_pop
= 0;
497 /* Nonzero for -ffloat-store: don't allocate floats and doubles
498 in extended-precision registers. */
500 int flag_float_store
= 0;
502 /* Nonzero for -fcse-follow-jumps:
503 have cse follow jumps to do a more extensive job. */
505 int flag_cse_follow_jumps
;
507 /* Nonzero for -fcse-skip-blocks:
508 have cse follow a branch around a block. */
509 int flag_cse_skip_blocks
;
511 /* Nonzero for -fexpensive-optimizations:
512 perform miscellaneous relatively-expensive optimizations. */
513 int flag_expensive_optimizations
;
515 /* Nonzero for -fthread-jumps:
516 have jump optimize output of loop. */
518 int flag_thread_jumps
;
520 /* Nonzero enables strength-reduction in loop.c. */
522 int flag_strength_reduce
= 0;
524 /* Nonzero enables loop unrolling in unroll.c. Only loops for which the
525 number of iterations can be calculated at compile-time (UNROLL_COMPLETELY,
526 UNROLL_MODULO) or at run-time (preconditioned to be UNROLL_MODULO) are
529 int flag_unroll_loops
;
531 /* Nonzero enables loop unrolling in unroll.c. All loops are unrolled.
532 This is generally not a win. */
534 int flag_unroll_all_loops
;
536 /* Nonzero forces all invariant computations in loops to be moved
539 int flag_move_all_movables
= 0;
541 /* Nonzero forces all general induction variables in loops to be
544 int flag_reduce_all_givs
= 0;
546 /* Nonzero to perform full register move optimization passes. This is the
549 int flag_regmove
= 0;
551 /* Nonzero for -fwritable-strings:
552 store string constants in data segment and don't uniquize them. */
554 int flag_writable_strings
= 0;
556 /* Nonzero means don't put addresses of constant functions in registers.
557 Used for compiling the Unix kernel, where strange substitutions are
558 done on the assembly output. */
560 int flag_no_function_cse
= 0;
562 /* Nonzero for -fomit-frame-pointer:
563 don't make a frame pointer in simple functions that don't require one. */
565 int flag_omit_frame_pointer
= 0;
567 /* Nonzero means place each function into its own section on those platforms
568 which support arbitrary section names and unlimited numbers of sections. */
570 int flag_function_sections
= 0;
572 /* ... and similar for data. */
574 int flag_data_sections
= 0;
576 /* Nonzero to inhibit use of define_optimization peephole opts. */
578 int flag_no_peephole
= 0;
580 /* Nonzero allows GCC to violate some IEEE or ANSI rules regarding math
581 operations in the interest of optimization. For example it allows
582 GCC to assume arguments to sqrt are nonnegative numbers, allowing
583 faster code for sqrt to be generated. */
585 int flag_fast_math
= 0;
587 /* Nonzero allows GCC to optimize sibling and tail recursive calls. */
589 int flag_optimize_sibling_calls
= 0;
591 /* Nonzero means the front end generally wants `errno' maintained by math
592 operations, like built-in SQRT, unless overridden by flag_fast_math. */
594 int flag_errno_math
= 1;
596 /* 0 means straightforward implementation of complex divide acceptable.
597 1 means wide ranges of inputs must work for complex divide.
598 2 means C9X-like requirements for complex divide (not yet implemented). */
600 int flag_complex_divide_method
= 0;
602 /* Nonzero means all references through pointers are volatile. */
606 /* Nonzero means treat all global and extern variables as volatile. */
608 int flag_volatile_global
;
610 /* Nonzero means treat all static variables as volatile. */
612 int flag_volatile_static
;
614 /* Nonzero means just do syntax checking; don't output anything. */
616 int flag_syntax_only
= 0;
618 /* Nonzero means perform global cse. */
620 static int flag_gcse
;
622 /* Nonzero means to use global dataflow analysis to eliminate
623 useless null pointer tests. */
625 static int flag_delete_null_pointer_checks
;
627 /* Nonzero means to rerun cse after loop optimization. This increases
628 compilation time about 20% and picks up a few more common expressions. */
630 static int flag_rerun_cse_after_loop
;
632 /* Nonzero means to run loop optimizations twice. */
634 int flag_rerun_loop_opt
;
636 /* Nonzero for -finline-functions: ok to inline functions that look like
637 good inline candidates. */
639 int flag_inline_functions
;
641 /* Nonzero for -fkeep-inline-functions: even if we make a function
642 go inline everywhere, keep its definition around for debugging
645 int flag_keep_inline_functions
;
647 /* Nonzero means that functions will not be inlined. */
651 /* Nonzero means that we should emit static const variables
652 regardless of whether or not optimization is turned on. */
654 int flag_keep_static_consts
= 1;
656 /* Nonzero means we should be saving declaration info into a .X file. */
658 int flag_gen_aux_info
= 0;
660 /* Specified name of aux-info file. */
662 static char *aux_info_file_name
;
664 /* Nonzero means make the text shared if supported. */
666 int flag_shared_data
;
668 /* Nonzero means schedule into delayed branch slots if supported. */
670 int flag_delayed_branch
;
672 /* Nonzero if we are compiling pure (sharable) code.
673 Value is 1 if we are doing reasonable (i.e. simple
674 offset into offset table) pic. Value is 2 if we can
675 only perform register offsets. */
679 /* Nonzero means generate extra code for exception handling and enable
680 exception handling. */
684 /* Nonzero means use the new model for exception handling. Replaces
685 -DNEW_EH_MODEL as a compile option. */
687 int flag_new_exceptions
= 1;
689 /* Nonzero means generate frame unwind info table when supported */
691 int flag_unwind_tables
= 0;
693 /* Nonzero means don't place uninitialized global data in common storage
698 /* Nonzero means pretend it is OK to examine bits of target floats,
699 even if that isn't true. The resulting code will have incorrect constants,
700 but the same series of instructions that the native compiler would make. */
702 int flag_pretend_float
;
704 /* Nonzero means change certain warnings into errors.
705 Usually these are warnings about failure to conform to some standard. */
707 int flag_pedantic_errors
= 0;
709 /* flag_schedule_insns means schedule insns within basic blocks (before
711 flag_schedule_insns_after_reload means schedule insns after
714 int flag_schedule_insns
= 0;
715 int flag_schedule_insns_after_reload
= 0;
717 /* The following flags have effect only for scheduling before register
720 flag_schedule_interblock means schedule insns accross basic blocks.
721 flag_schedule_speculative means allow speculative motion of non-load insns.
722 flag_schedule_speculative_load means allow speculative motion of some
724 flag_schedule_speculative_load_dangerous allows speculative motion of more
727 int flag_schedule_interblock
= 1;
728 int flag_schedule_speculative
= 1;
729 int flag_schedule_speculative_load
= 0;
730 int flag_schedule_speculative_load_dangerous
= 0;
732 /* flag_on_branch_count_reg means try to replace add-1,compare,branch tupple
733 by a cheaper branch, on a count register. */
734 int flag_branch_on_count_reg
;
736 /* -finhibit-size-directive inhibits output of .size for ELF.
737 This is used only for compiling crtstuff.c,
738 and it may be extended to other effects
739 needed for crtstuff.c on other systems. */
740 int flag_inhibit_size_directive
= 0;
742 /* -fverbose-asm causes extra commentary information to be produced in
743 the generated assembly code (to make it more readable). This option
744 is generally only of use to those who actually need to read the
745 generated assembly code (perhaps while debugging the compiler itself).
746 -fno-verbose-asm, the default, causes the extra information
747 to be omitted and is useful when comparing two assembler files. */
749 int flag_verbose_asm
= 0;
751 /* -dA causes debug commentary information to be produced in
752 the generated assembly code (to make it more readable). This option
753 is generally only of use to those who actually need to read the
754 generated assembly code (perhaps while debugging the compiler itself).
755 Currently, this switch is only used by dwarfout.c; however, it is intended
756 to be a catchall for printing debug information in the assembler file. */
758 int flag_debug_asm
= 0;
760 /* -fgnu-linker specifies use of the GNU linker for initializations.
761 (Or, more generally, a linker that handles initializations.)
762 -fno-gnu-linker says that collect2 will be used. */
764 int flag_gnu_linker
= 0;
766 int flag_gnu_linker
= 1;
772 /* Tag all structures with __attribute__(packed) */
773 int flag_pack_struct
= 0;
775 /* Emit code to check for stack overflow; also may cause large objects
776 to be allocated dynamically. */
777 int flag_stack_check
;
779 /* When non-NULL, indicates that whenever space is allocated on the
780 stack, the resulting stack pointer must not pass this
781 address---that is, for stacks that grow downward, the stack pointer
782 must always be greater than or equal to this address; for stacks
783 that grow upward, the stack pointer must be less than this address.
784 At present, the rtx may be either a REG or a SYMBOL_REF, although
785 the support provided depends on the backend. */
788 /* -fcheck-memory-usage causes extra code to be generated in order to check
789 memory accesses. This is used by a detector of bad memory accesses such
791 int flag_check_memory_usage
= 0;
793 /* -fprefix-function-name causes function name to be prefixed. This
794 can be used with -fcheck-memory-usage to isolate code compiled with
795 -fcheck-memory-usage. */
796 int flag_prefix_function_name
= 0;
798 /* 0 if pointer arguments may alias each other. True in C.
799 1 if pointer arguments may not alias each other but may alias
801 2 if pointer arguments may not alias each other and may not
802 alias global variables. True in Fortran.
803 This defaults to 0 for C. */
804 int flag_argument_noalias
= 0;
806 /* Nonzero if we should do (language-dependent) alias analysis.
807 Typically, this analysis will assume that expressions of certain
808 types do not alias expressions of certain other types. Only used
809 if alias analysis (in general) is enabled. */
810 int flag_strict_aliasing
= 0;
812 /* Instrument functions with calls at entry and exit, for profiling. */
813 int flag_instrument_function_entry_exit
= 0;
815 /* Nonzero means ignore `#ident' directives. 0 means handle them.
816 On SVR4 targets, it also controls whether or not to emit a
817 string identifying the compiler. */
819 int flag_no_ident
= 0;
821 /* This will perform a peephole pass before sched2. */
822 int flag_peephole2
= 0;
824 /* -fbounded-pointers causes gcc to compile pointers as composite
825 objects occupying three words: the pointer value, the base address
826 of the referent object, and the address immediately beyond the end
827 of the referent object. The base and extent allow us to perform
828 runtime bounds checking. -fbounded-pointers implies -fcheck-bounds. */
829 int flag_bounded_pointers
= 0;
831 /* -fcheck-bounds causes gcc to generate array bounds checks.
832 For C, C++: defaults to value of flag_bounded_pointers.
833 For ObjC: defaults to off.
834 For Java: defaults to on.
835 For Fortran: defaults to off.
836 For CHILL: defaults to off. */
837 int flag_bounds_check
= 0;
839 /* If one, renumber instruction UIDs to reduce the number of
840 unused UIDs if there are a lot of instructions. If greater than
841 one, unconditionally renumber instruction UIDs. */
842 int flag_renumber_insns
= 1;
844 /* Values of the -falign-* flags: how much to align labels in code.
845 0 means `use default', 1 means `don't align'.
846 For each variable, there is an _log variant which is the power
847 of two not less than the variable, for .align output. */
854 int align_labels_log
;
856 int align_functions_log
;
858 /* Table of supported debugging formats. */
862 /* Since PREFERRED_DEBUGGING_TYPE isn't necessarily a
863 constant expression, we use NO_DEBUG in its place. */
864 enum debug_info_type debug_type
;
865 int use_extensions_p
;
866 const char * description
;
870 { "", NO_DEBUG
, DEFAULT_GDB_EXTENSIONS
,
871 "Generate default debug format output" },
872 { "gdb", NO_DEBUG
, 1, "Generate default extended debug format output" },
873 #ifdef DBX_DEBUGGING_INFO
874 { "stabs", DBX_DEBUG
, 0, "Generate STABS format debug output" },
875 { "stabs+", DBX_DEBUG
, 1, "Generate extended STABS format debug output" },
877 #ifdef DWARF_DEBUGGING_INFO
878 { "dwarf", DWARF_DEBUG
, 0, "Generate DWARF-1 format debug output"},
879 { "dwarf+", DWARF_DEBUG
, 1,
880 "Generated extended DWARF-1 format debug output" },
882 #ifdef DWARF2_DEBUGGING_INFO
883 { "dwarf-2", DWARF2_DEBUG
, 0, "Enable DWARF-2 debug output" },
885 #ifdef XCOFF_DEBUGGING_INFO
886 { "xcoff", XCOFF_DEBUG
, 0, "Generate XCOFF format debug output" },
887 { "xcoff+", XCOFF_DEBUG
, 1, "Generate extended XCOFF format debug output" },
889 #ifdef SDB_DEBUGGING_INFO
890 { "coff", SDB_DEBUG
, 0, "Generate COFF format debug output" },
900 const char * description
;
902 lang_independent_options
;
904 /* Add or remove a leading underscore from user symbols. */
905 int flag_leading_underscore
= -1;
907 /* The user symbol prefix after having resolved same. */
908 const char *user_label_prefix
;
910 /* A default for same. */
911 #ifndef USER_LABEL_PREFIX
912 #define USER_LABEL_PREFIX ""
915 /* Table of language-independent -f options.
916 STRING is the option name. VARIABLE is the address of the variable.
917 ON_VALUE is the value to store in VARIABLE
918 if `-fSTRING' is seen as an option.
919 (If `-fno-STRING' is seen as an option, the opposite value is stored.) */
921 lang_independent_options f_options
[] =
923 {"float-store", &flag_float_store
, 1,
924 "Do not store floats in registers" },
925 {"volatile", &flag_volatile
, 1,
926 "Consider all mem refs through pointers as volatile"},
927 {"volatile-global", &flag_volatile_global
, 1,
928 "Consider all mem refs to global data to be volatile" },
929 {"volatile-static", &flag_volatile_static
, 1,
930 "Consider all mem refs to static data to be volatile" },
931 {"defer-pop", &flag_defer_pop
, 1,
932 "Defer popping functions args from stack until later" },
933 {"omit-frame-pointer", &flag_omit_frame_pointer
, 1,
934 "When possible do not generate stack frames"},
935 {"optimize-sibling-calls", &flag_optimize_sibling_calls
, 1,
936 "Optimize sibling and tail recursive calls" },
937 {"cse-follow-jumps", &flag_cse_follow_jumps
, 1,
938 "When running CSE, follow jumps to their targets" },
939 {"cse-skip-blocks", &flag_cse_skip_blocks
, 1,
940 "When running CSE, follow conditional jumps" },
941 {"expensive-optimizations", &flag_expensive_optimizations
, 1,
942 "Perform a number of minor, expensive optimisations" },
943 {"thread-jumps", &flag_thread_jumps
, 1,
944 "Perform jump threading optimisations"},
945 {"strength-reduce", &flag_strength_reduce
, 1,
946 "Perform strength reduction optimisations" },
947 {"unroll-loops", &flag_unroll_loops
, 1,
948 "Perform loop unrolling when iteration count is known" },
949 {"unroll-all-loops", &flag_unroll_all_loops
, 1,
950 "Perform loop unrolling for all loops" },
951 {"move-all-movables", &flag_move_all_movables
, 1,
952 "Force all loop invariant computations out of loops" },
953 {"reduce-all-givs", &flag_reduce_all_givs
, 1,
954 "Strength reduce all loop general induction variables" },
955 {"writable-strings", &flag_writable_strings
, 1,
956 "Store strings in writable data section" },
957 {"peephole", &flag_no_peephole
, 0,
958 "Enable machine specific peephole optimisations" },
959 {"force-mem", &flag_force_mem
, 1,
960 "Copy memory operands into registers before using" },
961 {"force-addr", &flag_force_addr
, 1,
962 "Copy memory address constants into regs before using" },
963 {"function-cse", &flag_no_function_cse
, 0,
964 "Allow function addresses to be held in registers" },
965 {"inline-functions", &flag_inline_functions
, 1,
966 "Integrate simple functions into their callers" },
967 {"keep-inline-functions", &flag_keep_inline_functions
, 1,
968 "Generate code for funcs even if they are fully inlined" },
969 {"inline", &flag_no_inline
, 0,
970 "Pay attention to the 'inline' keyword"},
971 {"keep-static-consts", &flag_keep_static_consts
, 1,
972 "Emit static const variables even if they are not used" },
973 {"syntax-only", &flag_syntax_only
, 1,
974 "Check for syntax errors, then stop" },
975 {"shared-data", &flag_shared_data
, 1,
976 "Mark data as shared rather than private" },
977 {"caller-saves", &flag_caller_saves
, 1,
978 "Enable saving registers around function calls" },
979 {"pcc-struct-return", &flag_pcc_struct_return
, 1,
980 "Return 'short' aggregates in memory, not registers" },
981 {"reg-struct-return", &flag_pcc_struct_return
, 0,
982 "Return 'short' aggregates in registers" },
983 {"delayed-branch", &flag_delayed_branch
, 1,
984 "Attempt to fill delay slots of branch instructions" },
985 {"gcse", &flag_gcse
, 1,
986 "Perform the global common subexpression elimination" },
987 {"rerun-cse-after-loop", &flag_rerun_cse_after_loop
, 1,
988 "Run CSE pass after loop optimisations"},
989 {"rerun-loop-opt", &flag_rerun_loop_opt
, 1,
990 "Run the loop optimiser twice"},
991 {"delete-null-pointer-checks", &flag_delete_null_pointer_checks
, 1,
992 "Delete useless null pointer checks" },
993 {"pretend-float", &flag_pretend_float
, 1,
994 "Pretend that host and target use the same FP format"},
995 {"schedule-insns", &flag_schedule_insns
, 1,
996 "Reschedule instructions to avoid pipeline stalls"},
997 {"schedule-insns2", &flag_schedule_insns_after_reload
, 1,
998 "Run two passes of the instruction scheduler"},
999 {"sched-interblock",&flag_schedule_interblock
, 1,
1000 "Enable scheduling across basic blocks" },
1001 {"sched-spec",&flag_schedule_speculative
, 1,
1002 "Allow speculative motion of non-loads" },
1003 {"sched-spec-load",&flag_schedule_speculative_load
, 1,
1004 "Allow speculative motion of some loads" },
1005 {"sched-spec-load-dangerous",&flag_schedule_speculative_load_dangerous
, 1,
1006 "Allow speculative motion of more loads" },
1007 {"branch-count-reg",&flag_branch_on_count_reg
, 1,
1008 "Replace add,compare,branch with branch on count reg"},
1009 {"pic", &flag_pic
, 1,
1010 "Generate position independent code, if possible"},
1011 {"PIC", &flag_pic
, 2, ""},
1012 {"exceptions", &flag_exceptions
, 1,
1013 "Enable exception handling" },
1014 {"new-exceptions", &flag_new_exceptions
, 1,
1015 "Use the new model for exception handling" },
1016 {"unwind-tables", &flag_unwind_tables
, 1,
1017 "Just generate unwind tables for exception handling" },
1018 {"sjlj-exceptions", &exceptions_via_longjmp
, 1,
1019 "Use setjmp/longjmp to handle exceptions" },
1020 {"asynchronous-exceptions", &asynchronous_exceptions
, 1,
1021 "Support asynchronous exceptions" },
1022 {"profile-arcs", &profile_arc_flag
, 1,
1023 "Insert arc based program profiling code" },
1024 {"test-coverage", &flag_test_coverage
, 1,
1025 "Create data files needed by gcov" },
1026 {"branch-probabilities", &flag_branch_probabilities
, 1,
1027 "Use profiling information for branch probabilities" },
1028 {"reorder-blocks", &flag_reorder_blocks
, 1,
1029 "Reorder basic blocks to improve code placement" },
1030 {"rename-registers", &flag_rename_registers
, 1,
1031 "Do the register renaming optimization pass"},
1032 {"fast-math", &flag_fast_math
, 1,
1033 "Improve FP speed by violating ANSI & IEEE rules" },
1034 {"common", &flag_no_common
, 0,
1035 "Do not put unitialised globals in the common section" },
1036 {"inhibit-size-directive", &flag_inhibit_size_directive
, 1,
1037 "Do not generate .size directives" },
1038 {"function-sections", &flag_function_sections
, 1,
1039 "place each function into its own section" },
1040 {"data-sections", &flag_data_sections
, 1,
1041 "place data items into their own section" },
1042 {"verbose-asm", &flag_verbose_asm
, 1,
1043 "Add extra commentry to assembler output"},
1044 {"gnu-linker", &flag_gnu_linker
, 1,
1045 "Output GNU ld formatted global initialisers"},
1046 {"regmove", &flag_regmove
, 1,
1047 "Enables a register move optimisation"},
1048 {"optimize-register-move", &flag_regmove
, 1,
1049 "Do the full regmove optimization pass"},
1050 {"pack-struct", &flag_pack_struct
, 1,
1051 "Pack structure members together without holes" },
1052 {"stack-check", &flag_stack_check
, 1,
1053 "Insert stack checking code into the program" },
1054 {"argument-alias", &flag_argument_noalias
, 0,
1055 "Specify that arguments may alias each other & globals"},
1056 {"argument-noalias", &flag_argument_noalias
, 1,
1057 "Assume arguments may alias globals but not each other"},
1058 {"argument-noalias-global", &flag_argument_noalias
, 2,
1059 "Assume arguments do not alias each other or globals" },
1060 {"strict-aliasing", &flag_strict_aliasing
, 1,
1061 "Assume strict aliasing rules apply" },
1062 {"align-loops", &align_loops
, 0,
1063 "Align the start of loops" },
1064 {"align-jumps", &align_jumps
, 0,
1065 "Align labels which are only reached by jumping" },
1066 {"align-labels", &align_labels
, 0,
1067 "Align all labels" },
1068 {"align-functions", &align_functions
, 0,
1069 "Align the start of functions" },
1070 {"check-memory-usage", &flag_check_memory_usage
, 1,
1071 "Generate code to check every memory access" },
1072 {"prefix-function-name", &flag_prefix_function_name
, 1,
1073 "Add a prefix to all function names" },
1074 {"dump-unnumbered", &flag_dump_unnumbered
, 1,
1075 "Suppress output of instruction numbers and line number notes in debugging dumps"},
1076 {"instrument-functions", &flag_instrument_function_entry_exit
, 1,
1077 "Instrument function entry/exit with profiling calls"},
1078 {"ssa", &flag_ssa
, 1,
1079 "Enable SSA optimizations" },
1080 {"leading-underscore", &flag_leading_underscore
, 1,
1081 "External symbols have a leading underscore" },
1082 {"ident", &flag_no_ident
, 0,
1083 "Process #ident directives"},
1084 { "peephole2", &flag_peephole2
, 1,
1085 "Enables an rtl peephole pass run before sched2" },
1086 {"math-errno", &flag_errno_math
, 1,
1087 "Set errno after built-in math functions"},
1088 {"bounded-pointers", &flag_bounded_pointers
, 1,
1089 "Compile pointers as triples: value, base & end" },
1090 {"bounds-check", &flag_bounds_check
, 1,
1091 "Generate code to check bounds before dereferencing pointers and arrays" }
1094 #define NUM_ELEM(a) (sizeof (a) / sizeof ((a)[0]))
1096 /* Table of language-specific options. */
1098 static struct lang_opt
1100 const char * option
;
1101 const char * description
;
1103 documented_lang_options
[] =
1105 /* In order not to overload the --help output, the convention
1106 used here is to only describe those options which are not
1107 enabled by default. */
1109 { "-ansi", "Compile just for ANSI C" },
1110 { "-fallow-single-precision",
1111 "Do not promote floats to double if using -traditional" },
1112 { "-std= ", "Determine language standard"},
1114 { "-fsigned-bitfields", "" },
1115 { "-funsigned-bitfields","Make bitfields by unsigned by default" },
1116 { "-fno-signed-bitfields", "" },
1117 { "-fno-unsigned-bitfields","" },
1118 { "-fsigned-char", "Make 'char' be signed by default"},
1119 { "-funsigned-char", "Make 'char' be unsigned by default"},
1120 { "-fno-signed-char", "" },
1121 { "-fno-unsigned-char", "" },
1123 { "-ftraditional", "" },
1124 { "-traditional", "Attempt to support traditional K&R style C"},
1125 { "-fnotraditional", "" },
1126 { "-fno-traditional", "" },
1129 { "-fno-asm", "Do not recognise the 'asm' keyword" },
1130 { "-fbuiltin", "" },
1131 { "-fno-builtin", "Do not recognise any built in functions" },
1132 { "-fhosted", "Assume normal C execution environment" },
1133 { "-fno-hosted", "" },
1135 "Assume that standard libraries & main might not exist" },
1136 { "-fno-freestanding", "" },
1137 { "-fcond-mismatch", "Allow different types as args of ? operator"},
1138 { "-fno-cond-mismatch", "" },
1139 { "-fdollars-in-identifiers", "Allow the use of $ inside identifiers" },
1140 { "-fno-dollars-in-identifiers", "" },
1141 { "-fpreprocessed", "" },
1142 { "-fno-preprocessed", "" },
1143 { "-fshort-double", "Use the same size for double as for float" },
1144 { "-fno-short-double", "" },
1145 { "-fshort-enums", "Use the smallest fitting integer to hold enums"},
1146 { "-fno-short-enums", "" },
1147 { "-fshort-wchar", "Override the underlying type for wchar_t to `unsigned short'" },
1148 { "-fno-short-wchar", "" },
1150 { "-Wall", "Enable most warning messages" },
1151 { "-Wbad-function-cast",
1152 "Warn about casting functions to incompatible types" },
1153 { "-Wno-bad-function-cast", "" },
1154 { "-Wmissing-noreturn",
1155 "Warn about functions which might be candidates for attribute noreturn" },
1156 { "-Wno-missing-noreturn", "" },
1157 { "-Wcast-qual", "Warn about casts which discard qualifiers"},
1158 { "-Wno-cast-qual", "" },
1159 { "-Wchar-subscripts", "Warn about subscripts whose type is 'char'"},
1160 { "-Wno-char-subscripts", "" },
1161 { "-Wcomment", "Warn if nested comments are detected" },
1162 { "-Wno-comment", "" },
1163 { "-Wcomments", "Warn if nested comments are detected" },
1164 { "-Wno-comments", "" },
1165 { "-Wconversion", "Warn about possibly confusing type conversions" },
1166 { "-Wno-conversion", "" },
1167 { "-Wformat", "Warn about printf format anomalies" },
1168 { "-Wno-format", "" },
1169 { "-Wimplicit-function-declaration",
1170 "Warn about implicit function declarations" },
1171 { "-Wno-implicit-function-declaration", "" },
1172 { "-Werror-implicit-function-declaration", "" },
1173 { "-Wimplicit-int", "Warn when a declaration does not specify a type" },
1174 { "-Wno-implicit-int", "" },
1175 { "-Wimplicit", "" },
1176 { "-Wno-implicit", "" },
1177 { "-Wimport", "Warn about the use of the #import directive" },
1178 { "-Wno-import", "" },
1179 { "-Wlong-long","" },
1180 { "-Wno-long-long", "Do not warn about using 'long long' when -pedantic" },
1181 { "-Wmain", "Warn about suspicious declarations of main" },
1182 { "-Wno-main", "" },
1183 { "-Wmissing-braces",
1184 "Warn about possibly missing braces around initialisers" },
1185 { "-Wno-missing-braces", "" },
1186 { "-Wmissing-declarations",
1187 "Warn about global funcs without previous declarations"},
1188 { "-Wno-missing-declarations", "" },
1189 { "-Wmissing-prototypes", "Warn about global funcs without prototypes" },
1190 { "-Wno-missing-prototypes", "" },
1191 { "-Wmultichar", "Warn about use of multicharacter literals"},
1192 { "-Wno-multichar", "" },
1193 { "-Wnested-externs", "Warn about externs not at file scope level" },
1194 { "-Wno-nested-externs", "" },
1195 { "-Wparentheses", "Warn about possible missing parentheses" },
1196 { "-Wno-parentheses", "" },
1197 { "-Wpointer-arith", "Warn about function pointer arithmetic" },
1198 { "-Wno-pointer-arith", "" },
1199 { "-Wredundant-decls",
1200 "Warn about multiple declarations of the same object" },
1201 { "-Wno-redundant-decls", "" },
1202 { "-Wsign-compare", "Warn about signed/unsigned comparisons" },
1203 { "-Wno-sign-compare", "" },
1204 { "-Wfloat-equal", "Warn about testing equality of floating point numbers" },
1205 { "-Wno-float-equal", "" },
1206 { "-Wunknown-pragmas", "Warn about unrecognized pragmas" },
1207 { "-Wno-unknown-pragmas", "" },
1208 { "-Wstrict-prototypes", "Warn about non-prototyped function decls" },
1209 { "-Wno-strict-prototypes", "" },
1210 { "-Wtraditional", "Warn about constructs whose meaning change in ANSI C"},
1211 { "-Wno-traditional", "" },
1212 { "-Wtrigraphs", "Warn when trigraphs are encountered" },
1213 { "-Wno-trigraphs", "" },
1215 { "-Wno-undef", "" },
1216 { "-Wwrite-strings", "Mark strings as 'const char *'"},
1217 { "-Wno-write-strings", "" },
1219 #define DEFINE_LANG_NAME(NAME) { NULL, NAME },
1221 /* These are for Objective C. */
1222 DEFINE_LANG_NAME ("Objective C")
1224 { "-lang-objc", "" },
1225 { "-gen-decls", "Dump decls to a .decl file" },
1226 { "-fgnu-runtime", "Generate code for GNU runtime environment" },
1227 { "-fno-gnu-runtime", "" },
1228 { "-fnext-runtime", "Generate code for NeXT runtime environment" },
1229 { "-fno-next-runtime", "" },
1230 { "-Wselector", "Warn if a selector has multiple methods" },
1231 { "-Wno-selector", "" },
1232 { "-Wprotocol", "" },
1233 { "-Wno-protocol", "Do not warn if inherited methods are unimplemented"},
1234 { "-print-objc-runtime-info",
1235 "Generate C header of platform specific features" },
1237 #include "options.h"
1241 /* Here is a table, controlled by the tm.h file, listing each -m switch
1242 and which bits in `target_switches' it should set or clear.
1243 If VALUE is positive, it is bits to set.
1244 If VALUE is negative, -VALUE is bits to clear.
1245 (The sign bit is not used so there is no confusion.) */
1251 const char * description
;
1253 target_switches
[] = TARGET_SWITCHES
;
1255 /* This table is similar, but allows the switch to have a value. */
1257 #ifdef TARGET_OPTIONS
1260 const char * prefix
;
1261 const char ** variable
;
1262 const char * description
;
1264 target_options
[] = TARGET_OPTIONS
;
1267 /* Options controlling warnings */
1269 /* Don't print warning messages. -w. */
1271 int inhibit_warnings
= 0;
1273 /* Print various extra warnings. -W. */
1275 int extra_warnings
= 0;
1277 /* Treat warnings as errors. -Werror. */
1279 int warnings_are_errors
= 0;
1281 /* Nonzero to warn about unused local variables. */
1285 /* Nonzero to warn about code which is never reached. */
1287 int warn_notreached
;
1289 /* Nonzero to warn about variables used before they are initialized. */
1291 int warn_uninitialized
;
1293 /* Nonzero means warn about all declarations which shadow others. */
1297 /* Warn if a switch on an enum fails to have a case for every enum value. */
1301 /* Nonzero means warn about function definitions that default the return type
1302 or that use a null return and have a return-type other than void. */
1304 int warn_return_type
;
1306 /* Nonzero means warn about pointer casts that increase the required
1307 alignment of the target type (and might therefore lead to a crash
1308 due to a misaligned access). */
1310 int warn_cast_align
;
1312 /* Nonzero means warn about any identifiers that match in the first N
1313 characters. The value N is in `id_clash_len'. */
1318 /* Nonzero means warn about any objects definitions whose size is larger
1319 than N bytes. Also want about function definitions whose returned
1320 values are larger than N bytes. The value N is in `larger_than_size'. */
1322 int warn_larger_than
;
1323 HOST_WIDE_INT larger_than_size
;
1325 /* Nonzero means warn if inline function is too large. */
1329 /* Warn if a function returns an aggregate,
1330 since there are often incompatible calling conventions for doing this. */
1332 int warn_aggregate_return
;
1334 /* Warn if packed attribute on struct is unnecessary and inefficient. */
1338 /* Warn when gcc pads a structure to an alignment boundary. */
1342 /* Likewise for -W. */
1344 lang_independent_options W_options
[] =
1346 {"unused", &warn_unused
, 1, "Warn when a variable is unused" },
1347 {"error", &warnings_are_errors
, 1, ""},
1348 {"shadow", &warn_shadow
, 1, "Warn when one local variable shadows another" },
1349 {"switch", &warn_switch
, 1,
1350 "Warn about enumerated switches missing a specific case" },
1351 {"aggregate-return", &warn_aggregate_return
, 1,
1352 "Warn about returning structures, unions or arrays" },
1353 {"cast-align", &warn_cast_align
, 1,
1354 "Warn about pointer casts which increase alignment" },
1355 {"unreachable-code", &warn_notreached
, 1,
1356 "Warn about code that will never be executed" },
1357 {"uninitialized", &warn_uninitialized
, 1,
1358 "Warn about unitialized automatic variables"},
1359 {"inline", &warn_inline
, 1,
1360 "Warn when an inlined function cannot be inlined"},
1361 {"packed", &warn_packed
, 1,
1362 "Warn when the packed attribute has no effect on struct layout"},
1363 {"padded", &warn_padded
, 1,
1364 "Warn when padding is required to align struct members"}
1367 /* Output files for assembler code (real compiler output)
1368 and debugging dumps. */
1371 FILE *aux_info_file
;
1372 FILE *rtl_dump_file
= NULL
;
1374 /* Decode the string P as an integral parameter.
1375 If the string is indeed an integer return its numeric value else
1376 issue an Invalid Option error for the option PNAME and return DEFVAL.
1377 If PNAME is zero just return DEFVAL, do not call error. */
1380 read_integral_parameter (p
, pname
, defval
)
1385 const char *endp
= p
;
1389 if (*endp
>= '0' && *endp
<= '9')
1398 error ("Invalid option `%s'", pname
);
1406 /* Time accumulators, to count the total time spent in various passes.
1407 The first three are used in other files; the latter two only here. */
1413 static long integration_time
;
1414 static long jump_time
;
1415 static long cse_time
;
1416 static long gcse_time
;
1417 static long loop_time
;
1418 static long cse2_time
;
1419 static long branch_prob_time
;
1420 static long flow_time
;
1421 static long combine_time
;
1422 static long regmove_time
;
1423 static long sched_time
;
1424 static long local_alloc_time
;
1425 static long global_alloc_time
;
1426 static long flow2_time
;
1427 static long peephole2_time
;
1428 static long sched2_time
;
1429 static long dbr_sched_time
;
1430 static long reorder_blocks_time
;
1431 static long rename_registers_time
;
1432 static long shorten_branch_time
;
1433 static long stack_reg_time
;
1434 static long to_ssa_time
;
1435 static long from_ssa_time
;
1436 static long final_time
;
1437 static long symout_time
;
1438 static long dump_time
;
1439 static long all_time
;
1441 /* Return time used so far, in microseconds. */
1451 #else /* not BeOS */
1452 #if defined (_WIN32) && !defined (__CYGWIN__)
1456 return (clock() * 1000);
1457 #else /* not _WIN32 */
1463 tick
= 1000000 / sysconf(_SC_CLK_TCK
);
1465 return (tms
.tms_utime
+ tms
.tms_stime
) * tick
;
1471 # if HAVE_SYSCONF && defined _SC_CLK_TCK
1472 # define TICKS_PER_SECOND sysconf (_SC_CLK_TCK) /* POSIX 1003.1-1996 */
1475 # define TICKS_PER_SECOND CLK_TCK /* POSIX 1003.1-1988; obsolescent */
1477 # define TICKS_PER_SECOND HZ /* traditional UNIX */
1481 return (tms
.tms_utime
+ tms
.tms_stime
) * (1000000 / TICKS_PER_SECOND
);
1486 struct rusage rusage
;
1487 getrusage (0, &rusage
);
1488 return (rusage
.ru_utime
.tv_sec
* 1000000 + rusage
.ru_utime
.tv_usec
1489 + rusage
.ru_stime
.tv_sec
* 1000000 + rusage
.ru_stime
.tv_usec
);
1496 int proc_system_time
;
1497 int child_user_time
;
1498 int child_system_time
;
1500 times ((void *) &vms_times
);
1501 return (vms_times
.proc_user_time
+ vms_times
.proc_system_time
) * 10000;
1505 #endif /* _SC_CLK_TCK */
1507 #endif /* __BEOS__ */
1510 #define TIMEVAR(VAR, BODY) \
1512 long otime = get_run_time (); \
1514 VAR += get_run_time () - otime; \
1518 print_time (str
, total
)
1523 "time in %s: %ld.%06ld (%ld%%)\n",
1524 str
, total
/ 1000000, total
% 1000000,
1526 : (long) (((100.0 * (double) total
) / (double) all_time
) + .5));
1529 /* This is the default decl_printable_name function. */
1532 decl_name (decl
, verbosity
)
1534 int verbosity ATTRIBUTE_UNUSED
;
1536 return IDENTIFIER_POINTER (DECL_NAME (decl
));
1539 /* Mark P for GC. Also mark main_input_filename and input_filename. */
1545 struct file_stack
*stack
= *(struct file_stack
**)p
;
1547 /* We're only called for input_file_stack, so we can mark the current
1548 input_filename here as well. */
1549 ggc_mark_string (main_input_filename
);
1550 ggc_mark_string (input_filename
);
1554 ggc_mark_string (stack
->name
);
1555 stack
= stack
->next
;
1560 /* This calls abort and is used to avoid problems when abort if a macro.
1561 It is used when we need to pass the address of abort. */
1569 /* When `malloc.c' is compiled with `rcheck' defined,
1570 it calls this function to report clobberage. */
1574 const char * s ATTRIBUTE_UNUSED
;
1579 /* Return the logarithm of X, base 2, considering X unsigned,
1580 if X is a power of 2. Otherwise, returns -1.
1582 This should be used via the `exact_log2' macro. */
1586 register unsigned HOST_WIDE_INT x
;
1588 register int log
= 0;
1589 /* Test for 0 or a power of 2. */
1590 if (x
== 0 || x
!= (x
& -x
))
1592 while ((x
>>= 1) != 0)
1597 /* Given X, an unsigned number, return the largest int Y such that 2**Y <= X.
1598 If X is 0, return -1.
1600 This should be used via the floor_log2 macro. */
1604 register unsigned HOST_WIDE_INT x
;
1606 register int log
= -1;
1613 static int float_handler_set
;
1615 jmp_buf float_handler
;
1617 /* Signals actually come here. */
1620 float_signal (signo
)
1621 /* If this is missing, some compilers complain. */
1622 int signo ATTRIBUTE_UNUSED
;
1624 if (float_handled
== 0)
1626 #if defined (USG) || defined (hpux)
1627 signal (SIGFPE
, float_signal
); /* re-enable the signal catcher */
1630 signal (SIGFPE
, float_signal
);
1631 longjmp (float_handler
, 1);
1634 /* Specify where to longjmp to when a floating arithmetic error happens.
1635 If HANDLER is 0, it means don't handle the errors any more. */
1638 set_float_handler (handler
)
1641 float_handled
= (handler
!= 0);
1643 bcopy ((char *) handler
, (char *) float_handler
, sizeof (float_handler
));
1645 if (float_handled
&& ! float_handler_set
)
1647 signal (SIGFPE
, float_signal
);
1648 float_handler_set
= 1;
1652 /* This is a wrapper function for code which might elicit an
1653 arithmetic exception. That code should be passed in as a function
1654 pointer FN, and one argument DATA. DATA is usually a struct which
1655 contains the real input and output for function FN. This function
1656 returns 0 (failure) if longjmp was called (i.e. an exception
1657 occured.) It returns 1 (success) otherwise. */
1660 do_float_handler (fn
, data
)
1661 void (*fn
) PARAMS ((PTR
));
1668 /* We got here via longjmp() caused by an exception in function fn() */
1669 set_float_handler (NULL
);
1673 set_float_handler (buf
);
1675 set_float_handler (NULL
);
1679 /* Specify, in HANDLER, where to longjmp to when a floating arithmetic
1680 error happens, pushing the previous specification into OLD_HANDLER.
1681 Return an indication of whether there was a previous handler in effect. */
1684 push_float_handler (handler
, old_handler
)
1685 jmp_buf handler
, old_handler
;
1687 int was_handled
= float_handled
;
1691 memcpy ((char *) old_handler
, (char *) float_handler
,
1692 sizeof (float_handler
));
1694 memcpy ((char *) float_handler
, (char *) handler
, sizeof (float_handler
));
1698 /* Restore the previous specification of whether and where to longjmp to
1699 when a floating arithmetic error happens. */
1702 pop_float_handler (handled
, handler
)
1706 float_handled
= handled
;
1708 bcopy ((char *) handler
, (char *) float_handler
, sizeof (float_handler
));
1711 /* Handler for SIGPIPE. */
1715 /* If this is missing, some compilers complain. */
1716 int signo ATTRIBUTE_UNUSED
;
1718 fatal ("output pipe has been closed");
1721 /* Strip off a legitimate source ending from the input string NAME of
1722 length LEN. Rather than having to know the names used by all of
1723 our front ends, we strip off an ending of a period followed by
1724 up to five characters. (Java uses ".class".) */
1727 strip_off_ending (name
, len
)
1732 for (i
= 2; i
< 6 && len
> i
; i
++)
1734 if (name
[len
- i
] == '.')
1736 name
[len
- i
] = '\0';
1742 /* Output a quoted string. */
1745 output_quoted_string (asm_file
, string
)
1749 #ifdef OUTPUT_QUOTED_STRING
1750 OUTPUT_QUOTED_STRING (asm_file
, string
);
1754 putc ('\"', asm_file
);
1755 while ((c
= *string
++) != 0)
1757 if (c
== '\"' || c
== '\\')
1758 putc ('\\', asm_file
);
1761 putc ('\"', asm_file
);
1765 /* Output a file name in the form wanted by System V. */
1768 output_file_directive (asm_file
, input_name
)
1770 const char *input_name
;
1772 int len
= strlen (input_name
);
1773 const char *na
= input_name
+ len
;
1775 /* NA gets INPUT_NAME sans directory names. */
1776 while (na
> input_name
)
1780 #ifdef DIR_SEPARATOR
1781 if (na
[-1] == DIR_SEPARATOR
)
1787 #ifdef ASM_OUTPUT_MAIN_SOURCE_FILENAME
1788 ASM_OUTPUT_MAIN_SOURCE_FILENAME (asm_file
, na
);
1790 #ifdef ASM_OUTPUT_SOURCE_FILENAME
1791 ASM_OUTPUT_SOURCE_FILENAME (asm_file
, na
);
1793 fprintf (asm_file
, "\t.file\t");
1794 output_quoted_string (asm_file
, na
);
1795 fputc ('\n', asm_file
);
1800 #ifdef ASM_IDENTIFY_LANGUAGE
1801 /* Routine to build language identifier for object file. */
1803 output_lang_identify (asm_out_file
)
1806 int len
= strlen (lang_identify ()) + sizeof ("__gnu_compiled_") + 1;
1807 char *s
= (char *) alloca (len
);
1808 sprintf (s
, "__gnu_compiled_%s", lang_identify ());
1809 ASM_OUTPUT_LABEL (asm_out_file
, s
);
1813 /* Routine to open a dump file. Return true if the dump file is enabled. */
1816 open_dump_file (index
, decl
)
1817 enum dump_file_index index
;
1821 const char *open_arg
;
1824 if (! dump_file
[index
].enabled
)
1830 if (rtl_dump_file
!= NULL
)
1831 fclose (rtl_dump_file
);
1833 sprintf (seq
, ".%02d.", index
);
1835 if (! dump_file
[index
].initialized
)
1837 /* If we've not initialized the files, do so now. */
1838 if (graph_dump_format
!= no_graph
1839 && dump_file
[index
].graph_dump_p
)
1841 dump_name
= concat (seq
, dump_file
[index
].extension
, NULL
);
1842 clean_graph_dump_file (dump_base_name
, dump_name
);
1845 dump_file
[index
].initialized
= 1;
1851 dump_name
= concat (dump_base_name
, seq
,
1852 dump_file
[index
].extension
, NULL
);
1854 rtl_dump_file
= fopen (dump_name
, open_arg
);
1855 if (rtl_dump_file
== NULL
)
1856 pfatal_with_name (dump_name
);
1861 fprintf (rtl_dump_file
, "\n;; Function %s\n\n",
1862 decl_printable_name (decl
, 2));
1868 /* Routine to close a dump file. */
1871 close_dump_file (index
, func
, insns
)
1872 enum dump_file_index index
;
1873 void (*func
) PARAMS ((FILE *, rtx
));
1876 if (! rtl_dump_file
)
1883 && graph_dump_format
!= no_graph
1884 && dump_file
[index
].graph_dump_p
)
1889 sprintf (seq
, ".%02d.", index
);
1890 suffix
= concat (seq
, dump_file
[index
].extension
, NULL
);
1891 print_rtl_graph_with_bb (dump_base_name
, suffix
, insns
);
1896 func (rtl_dump_file
, insns
);
1898 fflush (rtl_dump_file
);
1899 fclose (rtl_dump_file
);
1901 rtl_dump_file
= NULL
;
1905 /* Do any final processing required for the declarations in VEC, of
1906 which there are LEN. We write out inline functions and variables
1907 that have been deferred until this point, but which are required.
1908 Returns non-zero if anything was put out. */
1910 wrapup_global_declarations (vec
, len
)
1917 int output_something
= 0;
1919 for (i
= 0; i
< len
; i
++)
1923 /* We're not deferring this any longer. */
1924 DECL_DEFER_OUTPUT (decl
) = 0;
1926 if (TREE_CODE (decl
) == VAR_DECL
&& DECL_SIZE (decl
) == 0
1927 && incomplete_decl_finalize_hook
!= 0)
1928 (*incomplete_decl_finalize_hook
) (decl
);
1931 /* Now emit any global variables or functions that we have been
1932 putting off. We need to loop in case one of the things emitted
1933 here references another one which comes earlier in the list. */
1937 for (i
= 0; i
< len
; i
++)
1941 if (TREE_ASM_WRITTEN (decl
) || DECL_EXTERNAL (decl
))
1944 /* Don't write out static consts, unless we still need them.
1946 We also keep static consts if not optimizing (for debugging),
1947 unless the user specified -fno-keep-static-consts.
1948 ??? They might be better written into the debug information.
1949 This is possible when using DWARF.
1951 A language processor that wants static constants to be always
1952 written out (even if it is not used) is responsible for
1953 calling rest_of_decl_compilation itself. E.g. the C front-end
1954 calls rest_of_decl_compilation from finish_decl.
1955 One motivation for this is that is conventional in some
1956 environments to write things like:
1957 static const char rcsid[] = "... version string ...";
1958 intending to force the string to be in the executable.
1960 A language processor that would prefer to have unneeded
1961 static constants "optimized away" would just defer writing
1962 them out until here. E.g. C++ does this, because static
1963 constants are often defined in header files.
1965 ??? A tempting alternative (for both C and C++) would be
1966 to force a constant to be written if and only if it is
1967 defined in a main file, as opposed to an include file. */
1969 if (TREE_CODE (decl
) == VAR_DECL
&& TREE_STATIC (decl
)
1970 && (! TREE_READONLY (decl
)
1971 || TREE_PUBLIC (decl
)
1972 || (!optimize
&& flag_keep_static_consts
)
1973 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl
))))
1976 rest_of_decl_compilation (decl
, NULL_PTR
, 1, 1);
1979 if (TREE_CODE (decl
) == FUNCTION_DECL
1980 && DECL_INITIAL (decl
) != 0
1981 && DECL_SAVED_INSNS (decl
) != 0
1982 && (flag_keep_inline_functions
1983 || (TREE_PUBLIC (decl
) && !DECL_COMDAT (decl
))
1984 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl
))))
1987 temporary_allocation ();
1988 output_inline_function (decl
);
1989 permanent_allocation (1);
1994 output_something
= 1;
1998 return output_something
;
2001 /* Issue appropriate warnings for the global declarations in VEC (of
2002 which there are LEN). Output debugging information for them. */
2004 check_global_declarations (vec
, len
)
2011 for (i
= 0; i
< len
; i
++)
2015 if (TREE_CODE (decl
) == VAR_DECL
&& TREE_STATIC (decl
)
2016 && ! TREE_ASM_WRITTEN (decl
))
2017 /* Cancel the RTL for this decl so that, if debugging info
2018 output for global variables is still to come,
2019 this one will be omitted. */
2020 DECL_RTL (decl
) = NULL
;
2022 /* Warn about any function
2023 declared static but not defined.
2024 We don't warn about variables,
2025 because many programs have static variables
2026 that exist only to get some text into the object file. */
2027 if (TREE_CODE (decl
) == FUNCTION_DECL
2029 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl
)))
2030 && DECL_INITIAL (decl
) == 0
2031 && DECL_EXTERNAL (decl
)
2032 && ! DECL_ARTIFICIAL (decl
)
2033 && ! TREE_PUBLIC (decl
))
2035 if (TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl
)))
2036 pedwarn_with_decl (decl
,
2037 "`%s' used but never defined");
2039 warning_with_decl (decl
,
2040 "`%s' declared `static' but never defined");
2041 /* This symbol is effectively an "extern" declaration now. */
2042 TREE_PUBLIC (decl
) = 1;
2043 assemble_external (decl
);
2046 /* Warn about static fns or vars defined but not used,
2047 but not about inline functions or static consts
2048 since defining those in header files is normal practice. */
2050 && ((TREE_CODE (decl
) == FUNCTION_DECL
&& ! DECL_INLINE (decl
))
2051 || (TREE_CODE (decl
) == VAR_DECL
&& ! TREE_READONLY (decl
)))
2052 && ! DECL_IN_SYSTEM_HEADER (decl
)
2053 && ! DECL_EXTERNAL (decl
)
2054 && ! TREE_PUBLIC (decl
)
2055 && ! TREE_USED (decl
)
2056 && (TREE_CODE (decl
) == FUNCTION_DECL
|| ! DECL_REGISTER (decl
))
2057 /* The TREE_USED bit for file-scope decls
2058 is kept in the identifier, to handle multiple
2059 external decls in different scopes. */
2060 && ! TREE_USED (DECL_NAME (decl
)))
2061 warning_with_decl (decl
, "`%s' defined but not used");
2063 #ifdef SDB_DEBUGGING_INFO
2064 /* The COFF linker can move initialized global vars to the end.
2065 And that can screw up the symbol ordering.
2066 By putting the symbols in that order to begin with,
2067 we avoid a problem. mcsun!unido!fauern!tumuc!pes@uunet.uu.net. */
2068 if (write_symbols
== SDB_DEBUG
&& TREE_CODE (decl
) == VAR_DECL
2069 && TREE_PUBLIC (decl
) && DECL_INITIAL (decl
)
2070 && ! DECL_EXTERNAL (decl
)
2071 && DECL_RTL (decl
) != 0)
2072 TIMEVAR (symout_time
, sdbout_symbol (decl
, 0));
2074 /* Output COFF information for non-global
2075 file-scope initialized variables. */
2076 if (write_symbols
== SDB_DEBUG
2077 && TREE_CODE (decl
) == VAR_DECL
2078 && DECL_INITIAL (decl
)
2079 && ! DECL_EXTERNAL (decl
)
2080 && DECL_RTL (decl
) != 0
2081 && GET_CODE (DECL_RTL (decl
)) == MEM
)
2082 TIMEVAR (symout_time
, sdbout_toplevel_data (decl
));
2083 #endif /* SDB_DEBUGGING_INFO */
2084 #ifdef DWARF_DEBUGGING_INFO
2085 /* Output DWARF information for file-scope tentative data object
2086 declarations, file-scope (extern) function declarations (which
2087 had no corresponding body) and file-scope tagged type declarations
2088 and definitions which have not yet been forced out. */
2090 if (write_symbols
== DWARF_DEBUG
2091 && (TREE_CODE (decl
) != FUNCTION_DECL
|| !DECL_INITIAL (decl
)))
2092 TIMEVAR (symout_time
, dwarfout_file_scope_decl (decl
, 1));
2094 #ifdef DWARF2_DEBUGGING_INFO
2095 /* Output DWARF2 information for file-scope tentative data object
2096 declarations, file-scope (extern) function declarations (which
2097 had no corresponding body) and file-scope tagged type declarations
2098 and definitions which have not yet been forced out. */
2100 if (write_symbols
== DWARF2_DEBUG
2101 && (TREE_CODE (decl
) != FUNCTION_DECL
|| !DECL_INITIAL (decl
)))
2102 TIMEVAR (symout_time
, dwarf2out_decl (decl
));
2107 /* Save the current INPUT_FILENAME and LINENO on the top entry in the
2108 INPUT_FILE_STACK. Push a new entry for FILE and LINE, and set the
2109 INPUT_FILENAME and LINENO accordingly. */
2112 push_srcloc (file
, line
)
2116 struct file_stack
*fs
;
2118 if (input_file_stack
)
2120 input_file_stack
->name
= input_filename
;
2121 input_file_stack
->line
= lineno
;
2124 fs
= (struct file_stack
*) xmalloc (sizeof (struct file_stack
));
2125 fs
->name
= input_filename
= file
;
2126 fs
->line
= lineno
= line
;
2127 fs
->indent_level
= 0;
2128 fs
->next
= input_file_stack
;
2129 input_file_stack
= fs
;
2130 input_file_stack_tick
++;
2133 /* Pop the top entry off the stack of presently open source files.
2134 Restore the INPUT_FILENAME and LINENO from the new topmost entry on
2140 struct file_stack
*fs
;
2142 fs
= input_file_stack
;
2143 input_file_stack
= fs
->next
;
2145 input_file_stack_tick
++;
2146 /* The initial souce file is never popped. */
2147 if (!input_file_stack
)
2149 input_filename
= input_file_stack
->name
;
2150 lineno
= input_file_stack
->line
;
2153 /* Compile an entire file of output from cpp, named NAME.
2154 Write a file of assembly output and various debugging dumps. */
2163 int name_specified
= name
!= 0;
2165 if (dump_base_name
== 0)
2166 dump_base_name
= name
? name
: "gccdump";
2170 integration_time
= 0;
2176 branch_prob_time
= 0;
2181 local_alloc_time
= 0;
2182 global_alloc_time
= 0;
2187 reorder_blocks_time
= 0;
2188 rename_registers_time
= 0;
2189 shorten_branch_time
= 0;
2197 /* Initialize data in various passes. */
2201 name
= init_parse (name
);
2202 init_emit_once (debug_info_level
== DINFO_LEVEL_NORMAL
2203 || debug_info_level
== DINFO_LEVEL_VERBOSE
2204 || flag_test_coverage
2205 || warn_notreached
);
2207 init_decl_processing ();
2214 init_function_once ();
2215 init_stor_layout_once ();
2216 init_varasm_once ();
2218 /* The following initialization functions need to generate rtl, so
2219 provide a dummy function context for them. */
2220 init_dummy_function_start ();
2223 if (flag_caller_saves
)
2224 init_caller_save ();
2225 expand_dummy_function_end ();
2227 /* If auxiliary info generation is desired, open the output file.
2228 This goes in the same directory as the source file--unlike
2229 all the other output files. */
2230 if (flag_gen_aux_info
)
2232 aux_info_file
= fopen (aux_info_file_name
, "w");
2233 if (aux_info_file
== 0)
2234 pfatal_with_name (aux_info_file_name
);
2237 /* Open assembler code output file. */
2239 if (flag_syntax_only
)
2240 asm_out_file
= NULL
;
2243 if (! name_specified
&& asm_file_name
== 0)
2244 asm_out_file
= stdout
;
2247 if (asm_file_name
== 0)
2249 int len
= strlen (dump_base_name
);
2250 char *dumpname
= (char *) xmalloc (len
+ 6);
2251 memcpy (dumpname
, dump_base_name
, len
+ 1);
2252 strip_off_ending (dumpname
, len
);
2253 strcat (dumpname
, ".s");
2254 asm_file_name
= dumpname
;
2256 if (!strcmp (asm_file_name
, "-"))
2257 asm_out_file
= stdout
;
2259 asm_out_file
= fopen (asm_file_name
, "w");
2260 if (asm_out_file
== 0)
2261 pfatal_with_name (asm_file_name
);
2264 #ifdef IO_BUFFER_SIZE
2265 setvbuf (asm_out_file
, (char *) xmalloc (IO_BUFFER_SIZE
),
2266 _IOFBF
, IO_BUFFER_SIZE
);
2271 name
= ggc_alloc_string (name
, strlen (name
));
2272 input_filename
= name
;
2274 /* Put an entry on the input file stack for the main input file. */
2275 push_srcloc (input_filename
, 0);
2277 /* Perform language-specific initialization.
2278 This may set main_input_filename. */
2281 /* If the input doesn't start with a #line, use the input name
2282 as the official input file name. */
2283 if (main_input_filename
== 0)
2284 main_input_filename
= name
;
2286 if (flag_syntax_only
)
2288 write_symbols
= NO_DEBUG
;
2290 profile_block_flag
= 0;
2294 ASM_FILE_START (asm_out_file
);
2296 #ifdef ASM_COMMENT_START
2297 if (flag_verbose_asm
)
2299 /* Print the list of options in effect. */
2300 print_version (asm_out_file
, ASM_COMMENT_START
);
2301 print_switch_values (asm_out_file
, 0, MAX_LINE
,
2302 ASM_COMMENT_START
, " ", "\n");
2303 /* Add a blank line here so it appears in assembler output but not
2305 fprintf (asm_out_file
, "\n");
2309 /* Output something to inform GDB that this compilation was by GCC. */
2310 #ifndef ASM_IDENTIFY_GCC
2311 fprintf (asm_out_file
, "gcc2_compiled.:\n");
2313 ASM_IDENTIFY_GCC (asm_out_file
);
2316 /* Output something to identify which front-end produced this file. */
2317 #ifdef ASM_IDENTIFY_LANGUAGE
2318 ASM_IDENTIFY_LANGUAGE (asm_out_file
);
2320 } /* ! flag_syntax_only */
2322 #ifndef ASM_OUTPUT_SECTION_NAME
2323 if (flag_function_sections
)
2325 warning ("-ffunction-sections not supported for this target.");
2326 flag_function_sections
= 0;
2328 if (flag_data_sections
)
2330 warning ("-fdata-sections not supported for this target.");
2331 flag_data_sections
= 0;
2335 if (flag_function_sections
2336 && (profile_flag
|| profile_block_flag
))
2338 warning ("-ffunction-sections disabled; it makes profiling impossible.");
2339 flag_function_sections
= 0;
2342 #ifndef OBJECT_FORMAT_ELF
2343 if (flag_function_sections
&& write_symbols
!= NO_DEBUG
)
2344 warning ("-ffunction-sections may affect debugging on some targets.");
2347 /* ??? Note: There used to be a conditional here
2348 to call assemble_zeros without fail if DBX_DEBUGGING_INFO is defined.
2349 This was to guarantee separation between gcc_compiled. and
2350 the first function, for the sake of dbx on Suns.
2351 However, having the extra zero here confused the Emacs
2352 code for unexec, and might confuse other programs too.
2353 Therefore, I took out that change.
2354 In future versions we should find another way to solve
2355 that dbx problem. -- rms, 23 May 93. */
2357 /* Don't let the first function fall at the same address
2358 as gcc_compiled., if profiling. */
2359 if (profile_flag
|| profile_block_flag
)
2361 /* It's best if we can write a nop here since some
2362 assemblers don't tolerate zeros in the text section. */
2363 output_asm_insn (get_insn_template (CODE_FOR_nop
, NULL
), NULL_PTR
);
2366 /* If dbx symbol table desired, initialize writing it
2367 and output the predefined types. */
2368 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
2369 if (write_symbols
== DBX_DEBUG
|| write_symbols
== XCOFF_DEBUG
)
2370 TIMEVAR (symout_time
, dbxout_init (asm_out_file
, main_input_filename
,
2373 #ifdef SDB_DEBUGGING_INFO
2374 if (write_symbols
== SDB_DEBUG
)
2375 TIMEVAR (symout_time
, sdbout_init (asm_out_file
, main_input_filename
,
2378 #ifdef DWARF_DEBUGGING_INFO
2379 if (write_symbols
== DWARF_DEBUG
)
2380 TIMEVAR (symout_time
, dwarfout_init (asm_out_file
, main_input_filename
));
2382 #ifdef DWARF2_UNWIND_INFO
2383 if (dwarf2out_do_frame ())
2384 dwarf2out_frame_init ();
2386 #ifdef DWARF2_DEBUGGING_INFO
2387 if (write_symbols
== DWARF2_DEBUG
)
2388 TIMEVAR (symout_time
, dwarf2out_init (asm_out_file
, main_input_filename
));
2391 /* Initialize yet another pass. */
2393 init_final (main_input_filename
);
2394 init_branch_prob (dump_base_name
);
2396 start_time
= get_run_time ();
2398 /* Call the parser, which parses the entire file
2399 (calling rest_of_compilation for each function). */
2401 if (yyparse () != 0)
2403 if (errorcount
== 0)
2404 fnotice (stderr
, "Errors detected in input file (your bison.simple is out of date)\n");
2406 /* In case there were missing closebraces,
2407 get us back to the global binding level. */
2408 while (! global_bindings_p ())
2412 /* Compilation is now finished except for writing
2413 what's left of the symbol table output. */
2415 parse_time
+= get_run_time () - start_time
;
2417 parse_time
-= integration_time
;
2418 parse_time
-= varconst_time
;
2420 if (flag_syntax_only
)
2423 globals
= getdecls ();
2425 /* Really define vars that have had only a tentative definition.
2426 Really output inline functions that must actually be callable
2427 and have not been output so far. */
2430 int len
= list_length (globals
);
2431 tree
*vec
= (tree
*) xmalloc (sizeof (tree
) * len
);
2435 /* Process the decls in reverse order--earliest first.
2436 Put them into VEC from back to front, then take out from front. */
2438 for (i
= 0, decl
= globals
; i
< len
; i
++, decl
= TREE_CHAIN (decl
))
2439 vec
[len
- i
- 1] = decl
;
2441 wrapup_global_declarations (vec
, len
);
2443 /* This must occur after the loop to output deferred functions. Else
2444 the profiler initializer would not be emitted if all the functions
2445 in this compilation unit were deferred.
2447 output_func_start_profiler can not cause any additional functions or
2448 data to need to be output, so it need not be in the deferred function
2450 output_func_start_profiler ();
2452 /* Now that all possible functions have been output, we can dump
2453 the exception table. */
2455 output_exception_table ();
2457 check_global_declarations (vec
, len
);
2463 /* Write out any pending weak symbol declarations. */
2467 /* Do dbx symbols */
2468 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
2469 if (write_symbols
== DBX_DEBUG
|| write_symbols
== XCOFF_DEBUG
)
2470 TIMEVAR (symout_time
,
2472 dbxout_finish (asm_out_file
, main_input_filename
);
2476 #ifdef DWARF_DEBUGGING_INFO
2477 if (write_symbols
== DWARF_DEBUG
)
2478 TIMEVAR (symout_time
,
2484 #ifdef DWARF2_UNWIND_INFO
2485 if (dwarf2out_do_frame ())
2486 dwarf2out_frame_finish ();
2489 #ifdef DWARF2_DEBUGGING_INFO
2490 if (write_symbols
== DWARF2_DEBUG
)
2491 TIMEVAR (symout_time
,
2493 dwarf2out_finish ();
2497 /* Output some stuff at end of file if nec. */
2499 end_final (dump_base_name
);
2501 if (flag_test_coverage
|| flag_branch_probabilities
)
2503 open_dump_file (DFI_bp
, NULL
);
2505 TIMEVAR (dump_time
, end_branch_prob (rtl_dump_file
));
2507 close_dump_file (DFI_bp
, NULL
, NULL_RTX
);
2511 ASM_FILE_END (asm_out_file
);
2514 /* Language-specific end of compilation actions. */
2518 /* Close the dump files. */
2520 if (flag_gen_aux_info
)
2522 fclose (aux_info_file
);
2524 unlink (aux_info_file_name
);
2527 if (optimize
> 0 && open_dump_file (DFI_combine
, NULL
))
2529 TIMEVAR (dump_time
, dump_combine_total_stats (rtl_dump_file
));
2530 close_dump_file (DFI_combine
, NULL
, NULL_RTX
);
2533 /* Close non-debugging input and output files. Take special care to note
2534 whether fclose returns an error, since the pages might still be on the
2535 buffer chain while the file is open. */
2539 if (! flag_syntax_only
2540 && (ferror (asm_out_file
) != 0 || fclose (asm_out_file
) != 0))
2541 fatal_io_error (asm_file_name
);
2543 /* Do whatever is necessary to finish printing the graphs. */
2544 if (graph_dump_format
!= no_graph
)
2548 for (i
= 0; i
< DFI_MAX
; ++i
)
2549 if (dump_file
[i
].initialized
&& dump_file
[i
].graph_dump_p
)
2554 sprintf (seq
, ".%02d.", i
);
2555 suffix
= concat (seq
, dump_file
[i
].extension
, NULL
);
2556 finish_graph_dump_file (dump_base_name
, suffix
);
2561 /* Free up memory for the benefit of leak detectors. */
2564 /* Print the times. */
2568 all_time
= get_run_time ();
2570 fprintf (stderr
,"\n");
2572 print_time ("parse", parse_time
);
2573 print_time ("integration", integration_time
);
2574 print_time ("jump", jump_time
);
2575 print_time ("cse", cse_time
);
2576 print_time ("to ssa", to_ssa_time
);
2577 print_time ("from ssa", from_ssa_time
);
2578 print_time ("gcse", gcse_time
);
2579 print_time ("loop", loop_time
);
2580 print_time ("cse2", cse2_time
);
2581 print_time ("branch-prob", branch_prob_time
);
2582 print_time ("flow", flow_time
);
2583 print_time ("combine", combine_time
);
2584 print_time ("regmove", regmove_time
);
2585 #ifdef INSN_SCHEDULING
2586 print_time ("sched", sched_time
);
2588 print_time ("local-alloc", local_alloc_time
);
2589 print_time ("global-alloc", global_alloc_time
);
2590 print_time ("flow2", flow2_time
);
2591 #ifdef HAVE_peephole2
2592 print_time ("peephole2", peephole2_time
);
2594 #ifdef INSN_SCHEDULING
2595 print_time ("sched2", sched2_time
);
2598 print_time ("dbranch", dbr_sched_time
);
2600 print_time ("bbro", reorder_blocks_time
);
2601 print_time ("rnreg", rename_registers_time
);
2602 print_time ("shorten-branch", shorten_branch_time
);
2604 print_time ("stack-reg", stack_reg_time
);
2606 print_time ("final", final_time
);
2607 print_time ("varconst", varconst_time
);
2608 print_time ("symout", symout_time
);
2609 print_time ("dump", dump_time
);
2611 print_time ("gc", gc_time
);
2615 /* This is called from various places for FUNCTION_DECL, VAR_DECL,
2616 and TYPE_DECL nodes.
2618 This does nothing for local (non-static) variables, unless the
2619 variable is a register variable with an ASMSPEC. In that case, or
2620 if the variable is not an automatice, it sets up the RTL and
2621 outputs any assembler code (label definition, storage allocation
2622 and initialization).
2624 DECL is the declaration. If ASMSPEC is nonzero, it specifies
2625 the assembler symbol name to be used. TOP_LEVEL is nonzero
2626 if this declaration is not within a function. */
2629 rest_of_decl_compilation (decl
, asmspec
, top_level
, at_end
)
2631 const char *asmspec
;
2635 /* Declarations of variables, and of functions defined elsewhere. */
2637 /* The most obvious approach, to put an #ifndef around where
2638 this macro is used, doesn't work since it's inside a macro call. */
2639 #ifndef ASM_FINISH_DECLARE_OBJECT
2640 #define ASM_FINISH_DECLARE_OBJECT(FILE, DECL, TOP, END)
2643 /* Forward declarations for nested functions are not "external",
2644 but we need to treat them as if they were. */
2645 if (TREE_STATIC (decl
) || DECL_EXTERNAL (decl
)
2646 || TREE_CODE (decl
) == FUNCTION_DECL
)
2647 TIMEVAR (varconst_time
,
2649 make_decl_rtl (decl
, asmspec
, top_level
);
2650 /* Initialized extern variable exists to be replaced
2651 with its value, or represents something that will be
2652 output in another file. */
2653 if (! (TREE_CODE (decl
) == VAR_DECL
2654 && DECL_EXTERNAL (decl
) && TREE_READONLY (decl
)
2655 && DECL_INITIAL (decl
) != 0
2656 && DECL_INITIAL (decl
) != error_mark_node
))
2657 /* Don't output anything
2658 when a tentative file-scope definition is seen.
2659 But at end of compilation, do output code for them. */
2660 if (! (! at_end
&& top_level
2661 && (DECL_INITIAL (decl
) == 0
2662 || DECL_INITIAL (decl
) == error_mark_node
)))
2663 assemble_variable (decl
, top_level
, at_end
, 0);
2664 if (decl
== last_assemble_variable_decl
)
2666 ASM_FINISH_DECLARE_OBJECT (asm_out_file
, decl
,
2670 else if (DECL_REGISTER (decl
) && asmspec
!= 0)
2672 if (decode_reg_name (asmspec
) >= 0)
2674 DECL_RTL (decl
) = 0;
2675 make_decl_rtl (decl
, asmspec
, top_level
);
2678 error ("invalid register name `%s' for register variable", asmspec
);
2680 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
2681 else if ((write_symbols
== DBX_DEBUG
|| write_symbols
== XCOFF_DEBUG
)
2682 && TREE_CODE (decl
) == TYPE_DECL
)
2683 TIMEVAR (symout_time
, dbxout_symbol (decl
, 0));
2685 #ifdef SDB_DEBUGGING_INFO
2686 else if (write_symbols
== SDB_DEBUG
&& top_level
2687 && TREE_CODE (decl
) == TYPE_DECL
)
2688 TIMEVAR (symout_time
, sdbout_symbol (decl
, 0));
2692 /* Called after finishing a record, union or enumeral type. */
2695 rest_of_type_compilation (type
, toplev
)
2696 #if defined(DBX_DEBUGGING_INFO) || defined(XCOFF_DEBUGGING_INFO) || defined (SDB_DEBUGGING_INFO)
2700 tree type ATTRIBUTE_UNUSED
;
2701 int toplev ATTRIBUTE_UNUSED
;
2704 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
2705 if (write_symbols
== DBX_DEBUG
|| write_symbols
== XCOFF_DEBUG
)
2706 TIMEVAR (symout_time
, dbxout_symbol (TYPE_STUB_DECL (type
), !toplev
));
2708 #ifdef SDB_DEBUGGING_INFO
2709 if (write_symbols
== SDB_DEBUG
)
2710 TIMEVAR (symout_time
, sdbout_symbol (TYPE_STUB_DECL (type
), !toplev
));
2714 /* DECL is an inline function, whose body is present, but which is not
2715 being output at this point. (We're putting that off until we need
2716 to do it.) If there are any actions that need to take place,
2717 including the emission of debugging information for the function,
2718 this is where they should go. This function may be called by
2719 language-dependent code for front-ends that do not even generate
2720 RTL for functions that don't need to be put out. */
2723 note_deferral_of_defined_inline_function (decl
)
2724 tree decl ATTRIBUTE_UNUSED
;
2726 #ifdef DWARF_DEBUGGING_INFO
2727 /* Generate the DWARF info for the "abstract" instance of a function
2728 which we may later generate inlined and/or out-of-line instances
2730 if (write_symbols
== DWARF_DEBUG
&& DECL_INLINE (decl
))
2732 /* The front-end may not have set CURRENT_FUNCTION_DECL, but the
2733 DWARF code expects it to be set in this case. Intuitively,
2734 DECL is the function we just finished defining, so setting
2735 CURRENT_FUNCTION_DECL is sensible. */
2736 tree saved_cfd
= current_function_decl
;
2737 current_function_decl
= decl
;
2739 /* Let the DWARF code do its work. */
2740 set_decl_abstract_flags (decl
, 1);
2741 dwarfout_file_scope_decl (decl
, 0);
2742 set_decl_abstract_flags (decl
, 0);
2744 /* Reset CURRENT_FUNCTION_DECL. */
2745 current_function_decl
= saved_cfd
;
2750 /* This is called from finish_function (within yyparse)
2751 after each top-level definition is parsed.
2752 It is supposed to compile that function or variable
2753 and output the assembler code for it.
2754 After we return, the tree storage is freed. */
2757 rest_of_compilation (decl
)
2761 int start_time
= get_run_time ();
2764 int rebuild_label_notes_after_reload
;
2766 /* When processing delayed functions, prepare_function_start() won't
2767 have been run to re-initialize it. */
2768 cse_not_expected
= ! optimize
;
2770 /* First, make sure that NOTE_BLOCK is set correctly for each
2771 NOTE_INSN_BLOCK_BEG/NOTE_INSN_BLOCK_END note. */
2772 if (!cfun
->x_whole_function_mode_p
)
2775 /* Then remove any notes we don't need. That will make iterating
2776 over the instruction sequence faster, and allow the garbage
2777 collector to reclaim the memory used by the notes. */
2778 remove_unncessary_notes ();
2780 /* In function-at-a-time mode, we do not attempt to keep the BLOCK
2781 tree in sensible shape. So, we just recalculate it here. */
2782 if (cfun
->x_whole_function_mode_p
)
2785 /* If we are reconsidering an inline function
2786 at the end of compilation, skip the stuff for making it inline. */
2788 if (DECL_SAVED_INSNS (decl
) == 0)
2794 /* If this is nested inside an inlined external function, pretend
2795 it was only declared. Since we cannot inline such functions,
2796 generating code for this one is not only not necessary but will
2797 confuse some debugging output writers. */
2798 for (parent
= DECL_CONTEXT (current_function_decl
);
2799 parent
!= NULL_TREE
;
2800 parent
= get_containing_scope (parent
))
2801 if (TREE_CODE (parent
) == FUNCTION_DECL
2802 && DECL_INLINE (parent
) && DECL_EXTERNAL (parent
))
2804 DECL_INITIAL (decl
) = 0;
2805 goto exit_rest_of_compilation
;
2808 /* If requested, consider whether to make this function inline. */
2809 if (DECL_INLINE (decl
) || flag_inline_functions
)
2810 TIMEVAR (integration_time
,
2812 lose
= function_cannot_inline_p (decl
);
2813 if (lose
|| ! optimize
)
2815 if (warn_inline
&& DECL_INLINE (decl
))
2816 warning_with_decl (decl
, lose
);
2817 DECL_ABSTRACT_ORIGIN (decl
) = 0;
2818 /* Don't really compile an extern inline function.
2819 If we can't make it inline, pretend
2820 it was only declared. */
2821 if (DECL_EXTERNAL (decl
))
2823 DECL_INITIAL (decl
) = 0;
2824 goto exit_rest_of_compilation
;
2828 /* ??? Note that this has the effect of making it look
2829 like "inline" was specified for a function if we choose
2830 to inline it. This isn't quite right, but it's
2831 probably not worth the trouble to fix. */
2832 inlinable
= DECL_INLINE (decl
) = 1;
2835 insns
= get_insns ();
2837 /* Dump the rtl code if we are dumping rtl. */
2839 if (open_dump_file (DFI_rtl
, decl
))
2841 if (DECL_SAVED_INSNS (decl
))
2842 fprintf (rtl_dump_file
, ";; (integrable)\n\n");
2843 close_dump_file (DFI_rtl
, print_rtl
, insns
);
2846 /* If function is inline, and we don't yet know whether to
2847 compile it by itself, defer decision till end of compilation.
2848 finish_compilation will call rest_of_compilation again
2849 for those functions that need to be output. Also defer those
2850 functions that we are supposed to defer. */
2853 || (DECL_INLINE (decl
)
2854 && ((! TREE_PUBLIC (decl
) && ! TREE_ADDRESSABLE (decl
)
2855 && ! flag_keep_inline_functions
)
2856 || DECL_EXTERNAL (decl
))))
2857 DECL_DEFER_OUTPUT (decl
) = 1;
2859 if (DECL_DEFER_OUTPUT (decl
))
2861 /* If -Wreturn-type, we have to do a bit of compilation.
2862 However, if we just fall through we will call
2863 save_for_inline_copying() which results in excessive
2864 memory use. Instead, we just want to call
2865 jump_optimize() to figure out whether or not we can fall
2866 off the end of the function; we do the minimum amount of
2867 work necessary to make that safe. And, we set optimize
2868 to zero to keep jump_optimize from working too hard. */
2869 if (warn_return_type
)
2871 int saved_optimize
= optimize
;
2873 find_exception_handler_labels ();
2874 jump_optimize (insns
, !JUMP_CROSS_JUMP
, !JUMP_NOOP_MOVES
,
2875 !JUMP_AFTER_REGSCAN
);
2876 optimize
= saved_optimize
;
2879 current_function_nothrow
= nothrow_function_p ();
2880 if (current_function_nothrow
)
2881 /* Now we know that this can't throw; set the flag for the benefit
2882 of other functions later in this translation unit. */
2883 TREE_NOTHROW (current_function_decl
) = 1;
2885 note_deferral_of_defined_inline_function (decl
);
2886 TIMEVAR (integration_time
, save_for_inline_nocopy (decl
));
2887 DECL_SAVED_INSNS (decl
)->inlinable
= inlinable
;
2888 goto exit_rest_of_compilation
;
2891 /* If specified extern inline but we aren't inlining it, we are
2892 done. This goes for anything that gets here with DECL_EXTERNAL
2893 set, not just things with DECL_INLINE. */
2894 if (DECL_EXTERNAL (decl
))
2895 goto exit_rest_of_compilation
;
2898 init_EXPR_INSN_LIST_cache ();
2903 /* Initialize some variables used by the optimizers. */
2904 init_function_for_compilation ();
2906 if (! DECL_DEFER_OUTPUT (decl
))
2907 TREE_ASM_WRITTEN (decl
) = 1;
2909 /* Now that integrate will no longer see our rtl, we need not distinguish
2910 between the return value of this function and the return value of called
2912 rtx_equal_function_value_matters
= 0;
2914 /* Don't return yet if -Wreturn-type; we need to do jump_optimize. */
2915 if ((rtl_dump_and_exit
|| flag_syntax_only
) && !warn_return_type
)
2916 goto exit_rest_of_compilation
;
2918 /* Emit code to get eh context, if needed. */
2921 /* We may have potential sibling or tail recursion sites. Select one
2922 (of possibly multiple) methods of performing the call. */
2923 if (flag_optimize_sibling_calls
)
2925 open_dump_file (DFI_sibling
, decl
);
2927 TIMEVAR (jump_time
, optimize_sibling_and_tail_recursive_calls ());
2929 close_dump_file (DFI_sibling
, print_rtl
, get_insns ());
2933 /* If we are doing position-independent code generation, now
2934 is the time to output special prologues and epilogues.
2935 We do not want to do this earlier, because it just clutters
2936 up inline functions with meaningless insns. */
2941 /* From now on, allocate rtl in current_obstack, not in saveable_obstack.
2942 Note that that may have been done above, in save_for_inline_copying.
2943 The call to resume_temporary_allocation near the end of this function
2944 goes back to the usual state of affairs. This must be done after
2945 we've built up any unwinders for exception handling, and done
2946 the FINALIZE_PIC work, if necessary. */
2948 rtl_in_current_obstack ();
2950 insns
= get_insns ();
2952 /* Copy any shared structure that should not be shared. */
2953 unshare_all_rtl (current_function_decl
, insns
);
2955 #ifdef SETJMP_VIA_SAVE_AREA
2956 /* This must be performed before virutal register instantiation. */
2957 if (current_function_calls_alloca
)
2958 optimize_save_area_alloca (insns
);
2961 /* Instantiate all virtual registers. */
2962 instantiate_virtual_regs (current_function_decl
, insns
);
2964 /* Find all the EH handlers. */
2965 find_exception_handler_labels ();
2967 open_dump_file (DFI_jump
, decl
);
2969 /* Always do one jump optimization pass to ensure that JUMP_LABEL fields
2970 are initialized and to compute whether control can drop off the end
2974 /* Turn NOTE_INSN_EXPECTED_VALUE into REG_BR_PROB. Do this
2975 before jump optimization switches branch directions. */
2976 expected_value_to_br_prob ();
2978 reg_scan (insns
, max_reg_num (), 0);
2979 jump_optimize (insns
, !JUMP_CROSS_JUMP
, !JUMP_NOOP_MOVES
,
2980 JUMP_AFTER_REGSCAN
);
2983 /* Now is when we stop if -fsyntax-only and -Wreturn-type. */
2984 if (rtl_dump_and_exit
|| flag_syntax_only
|| DECL_DEFER_OUTPUT (decl
))
2986 close_dump_file (DFI_jump
, print_rtl
, insns
);
2987 goto exit_rest_of_compilation
;
2992 /* Try to identify useless null pointer tests and delete them. */
2993 if (flag_delete_null_pointer_checks
)
2995 find_basic_blocks (insns
, max_reg_num (), rtl_dump_file
);
2996 cleanup_cfg (insns
);
2997 delete_null_pointer_checks (insns
);
3000 /* Jump optimization, and the removal of NULL pointer checks,
3001 may have reduced the number of instructions substantially.
3002 CSE, and future passes, allocate arrays whose dimensions
3003 involve the maximum instruction UID, so if we can reduce
3004 the maximum UID we'll save big on memory. */
3005 renumber_insns (rtl_dump_file
);
3008 close_dump_file (DFI_jump
, print_rtl
, insns
);
3013 /* Perform common subexpression elimination.
3014 Nonzero value from `cse_main' means that jumps were simplified
3015 and some code may now be unreachable, so do
3016 jump optimization again. */
3020 open_dump_file (DFI_cse
, decl
);
3022 TIMEVAR (cse_time
, reg_scan (insns
, max_reg_num (), 1));
3024 if (flag_thread_jumps
)
3025 TIMEVAR (jump_time
, thread_jumps (insns
, max_reg_num (), 1));
3027 TIMEVAR (cse_time
, tem
= cse_main (insns
, max_reg_num (),
3030 /* If we are not running the second CSE pass, then we are no longer
3031 expecting CSE to be run. */
3032 cse_not_expected
= !flag_rerun_cse_after_loop
;
3034 if (tem
|| optimize
> 1)
3035 TIMEVAR (jump_time
, jump_optimize (insns
, !JUMP_CROSS_JUMP
,
3037 !JUMP_AFTER_REGSCAN
));
3039 /* Run this after jump optmizations remove all the unreachable code
3040 so that unreachable code will not keep values live. */
3041 TIMEVAR (cse_time
, delete_trivially_dead_insns (insns
, max_reg_num ()));
3043 /* Try to identify useless null pointer tests and delete them. */
3044 if (flag_delete_null_pointer_checks
)
3047 find_basic_blocks (insns
, max_reg_num (), rtl_dump_file
);
3048 cleanup_cfg (insns
);
3049 delete_null_pointer_checks (insns
);
3052 /* The second pass of jump optimization is likely to have
3053 removed a bunch more instructions. */
3054 renumber_insns (rtl_dump_file
);
3056 close_dump_file (DFI_cse
, print_rtl
, insns
);
3059 open_dump_file (DFI_addressof
, decl
);
3061 purge_addressof (insns
);
3062 reg_scan (insns
, max_reg_num (), 1);
3064 close_dump_file (DFI_addressof
, print_rtl
, insns
);
3069 if (optimize
> 0 && flag_ssa
)
3071 open_dump_file (DFI_ssa
, decl
);
3073 TIMEVAR (to_ssa_time
,
3075 find_basic_blocks (insns
, max_reg_num(), rtl_dump_file
);
3076 cleanup_cfg (insns
);
3080 close_dump_file (DFI_ssa
, print_rtl_with_bb
, insns
);
3082 open_dump_file (DFI_ussa
, decl
);
3084 TIMEVAR (from_ssa_time
,
3086 convert_from_ssa ();
3088 /* New registers have been created. Rescan their usage. */
3089 reg_scan (insns
, max_reg_num (), 1);
3091 /* Life analysis used in SSA adds log_links but these
3092 shouldn't be there until the flow stage, so clear
3094 clear_log_links (insns
);
3097 close_dump_file (DFI_ussa
, print_rtl_with_bb
, insns
);
3103 /* Perform global cse. */
3105 if (optimize
> 0 && flag_gcse
)
3107 open_dump_file (DFI_gcse
, decl
);
3111 find_basic_blocks (insns
, max_reg_num(), rtl_dump_file
);
3112 cleanup_cfg (insns
);
3113 tem
= gcse_main (insns
, rtl_dump_file
);
3116 /* If gcse altered any jumps, rerun jump optimizations to clean
3120 TIMEVAR (jump_time
, jump_optimize (insns
, !JUMP_CROSS_JUMP
,
3122 !JUMP_AFTER_REGSCAN
));
3125 close_dump_file (DFI_gcse
, print_rtl
, insns
);
3131 /* Move constant computations out of loops. */
3135 open_dump_file (DFI_loop
, decl
);
3140 if (flag_rerun_loop_opt
)
3142 /* We only want to perform unrolling once. */
3144 loop_optimize (insns
, rtl_dump_file
, 0, 0);
3146 /* The first call to loop_optimize makes some instructions
3147 trivially dead. We delete those instructions now in the
3148 hope that doing so will make the heuristics in loop work
3149 better and possibly speed up compilation. */
3150 delete_trivially_dead_insns (insns
, max_reg_num ());
3152 /* The regscan pass is currently necessary as the alias
3153 analysis code depends on this information. */
3154 reg_scan (insns
, max_reg_num (), 1);
3156 loop_optimize (insns
, rtl_dump_file
, flag_unroll_loops
, 1);
3159 close_dump_file (DFI_loop
, print_rtl
, insns
);
3165 /* ??? Well, nearly. If HAVE_conditional_arithmetic, jump_optimize
3166 has put off all if-conversion until "after CSE". If we put this
3167 off any longer we may miss out doing if-conversion entirely. */
3168 cse_not_expected
= 1;
3172 open_dump_file (DFI_cse2
, decl
);
3174 if (flag_rerun_cse_after_loop
)
3176 /* Running another jump optimization pass before the second
3177 cse pass sometimes simplifies the RTL enough to allow
3178 the second CSE pass to do a better job. Jump_optimize can change
3179 max_reg_num so we must rerun reg_scan afterwards.
3180 ??? Rework to not call reg_scan so often. */
3183 reg_scan (insns
, max_reg_num (), 0);
3184 jump_optimize (insns
, !JUMP_CROSS_JUMP
,
3185 !JUMP_NOOP_MOVES
, JUMP_AFTER_REGSCAN
);
3190 reg_scan (insns
, max_reg_num (), 0);
3191 tem
= cse_main (insns
, max_reg_num (),
3196 TIMEVAR (jump_time
, jump_optimize (insns
, !JUMP_CROSS_JUMP
,
3198 !JUMP_AFTER_REGSCAN
));
3201 if (flag_thread_jumps
)
3203 /* This pass of jump threading straightens out code
3204 that was kinked by loop optimization. */
3207 reg_scan (insns
, max_reg_num (), 0);
3208 thread_jumps (insns
, max_reg_num (), 0);
3212 close_dump_file (DFI_cse2
, print_rtl
, insns
);
3218 if (profile_arc_flag
|| flag_test_coverage
|| flag_branch_probabilities
)
3220 open_dump_file (DFI_bp
, decl
);
3222 TIMEVAR (branch_prob_time
,
3224 branch_prob (insns
, rtl_dump_file
);
3227 close_dump_file (DFI_bp
, print_rtl
, insns
);
3235 /* Print function header into flow dump now
3236 because doing the flow analysis makes some of the dump. */
3238 open_dump_file (DFI_flow
, decl
);
3240 /* Do control and data flow analysis; wrote some of the results to
3246 find_basic_blocks (insns
, max_reg_num (), rtl_dump_file
);
3247 cleanup_cfg (insns
);
3249 calculate_loop_depth (rtl_dump_file
);
3250 life_analysis (insns
, max_reg_num (), rtl_dump_file
, 1);
3251 mark_constant_function ();
3254 if (warn_uninitialized
|| extra_warnings
)
3256 uninitialized_vars_warning (DECL_INITIAL (decl
));
3258 setjmp_args_warning ();
3261 close_dump_file (DFI_flow
, print_rtl_with_bb
, insns
);
3266 /* The first life analysis pass has finished. From now on we can not
3267 generate any new pseudos. */
3270 /* If -opt, try combining insns through substitution. */
3274 int rebuild_jump_labels_after_combine
= 0;
3276 open_dump_file (DFI_combine
, decl
);
3278 TIMEVAR (combine_time
,
3280 rebuild_jump_labels_after_combine
3281 = combine_instructions (insns
, max_reg_num ());
3284 /* Combining insns may have turned an indirect jump into a
3285 direct jump. Rebuid the JUMP_LABEL fields of jumping
3287 if (rebuild_jump_labels_after_combine
)
3289 TIMEVAR (jump_time
, rebuild_jump_labels (insns
));
3292 close_dump_file (DFI_combine
, print_rtl_with_bb
, insns
);
3298 /* Register allocation pre-pass, to reduce number of moves
3299 necessary for two-address machines. */
3300 if (optimize
> 0 && (flag_regmove
|| flag_expensive_optimizations
))
3302 open_dump_file (DFI_regmove
, decl
);
3304 TIMEVAR (regmove_time
, regmove_optimize (insns
, max_reg_num (),
3307 close_dump_file (DFI_regmove
, print_rtl_with_bb
, insns
);
3313 if (optimize
&& n_basic_blocks
)
3315 TIMEVAR (gcse_time
, optimize_mode_switching (NULL_PTR
));
3318 #ifdef INSN_SCHEDULING
3320 /* Print function header into sched dump now
3321 because doing the sched analysis makes some of the dump. */
3322 if (optimize
> 0 && flag_schedule_insns
)
3324 open_dump_file (DFI_sched
, decl
);
3326 /* Do control and data sched analysis,
3327 and write some of the results to dump file. */
3329 TIMEVAR (sched_time
, schedule_insns (rtl_dump_file
));
3331 close_dump_file (DFI_sched
, print_rtl_with_bb
, insns
);
3338 /* Determine if the current function is a leaf before running reload
3339 since this can impact optimizations done by the prologue and
3340 epilogue thus changing register elimination offsets. */
3341 current_function_is_leaf
= leaf_function_p ();
3343 open_dump_file (DFI_lreg
, decl
);
3345 /* Allocate pseudo-regs that are used only within 1 basic block.
3347 RUN_JUMP_AFTER_RELOAD records whether or not we need to rerun the
3348 jump optimizer after register allocation and reloading are finished. */
3350 TIMEVAR (local_alloc_time
,
3352 /* We recomputed reg usage as part of updating the rest
3353 of life info during sched. */
3354 if (! flag_schedule_insns
)
3355 recompute_reg_usage (insns
, ! optimize_size
);
3356 regclass (insns
, max_reg_num (), rtl_dump_file
);
3357 rebuild_label_notes_after_reload
= local_alloc ();
3360 if (dump_file
[DFI_lreg
].enabled
)
3364 dump_flow_info (rtl_dump_file
);
3365 dump_local_alloc (rtl_dump_file
);
3368 close_dump_file (DFI_lreg
, print_rtl_with_bb
, insns
);
3374 open_dump_file (DFI_greg
, decl
);
3376 /* If optimizing, allocate remaining pseudo-regs. Do the reload
3377 pass fixing up any insns that are invalid. */
3379 TIMEVAR (global_alloc_time
,
3382 failure
= global_alloc (rtl_dump_file
);
3385 build_insn_chain (insns
);
3386 failure
= reload (insns
, 0, rtl_dump_file
);
3391 goto exit_rest_of_compilation
;
3396 /* Do a very simple CSE pass over just the hard registers. */
3398 reload_cse_regs (insns
);
3400 /* If optimizing, then go ahead and split insns now since we are about
3401 to recompute flow information anyway. */
3403 split_all_insns (0);
3405 /* Register allocation and reloading may have turned an indirect jump into
3406 a direct jump. If so, we must rebuild the JUMP_LABEL fields of
3407 jumping instructions. */
3408 if (rebuild_label_notes_after_reload
)
3409 TIMEVAR (jump_time
, rebuild_jump_labels (insns
));
3411 if (dump_file
[DFI_greg
].enabled
)
3413 TIMEVAR (dump_time
, dump_global_regs (rtl_dump_file
));
3414 close_dump_file (DFI_greg
, print_rtl_with_bb
, insns
);
3417 /* Re-create the death notes which were deleted during reload. */
3418 open_dump_file (DFI_flow2
, decl
);
3420 TIMEVAR (flow2_time
,
3422 jump_optimize_minimal (insns
);
3423 find_basic_blocks (insns
, max_reg_num (), rtl_dump_file
);
3426 /* On some machines, the prologue and epilogue code, or parts thereof,
3427 can be represented as RTL. Doing so lets us schedule insns between
3428 it and the rest of the code and also allows delayed branch
3429 scheduling to operate in the epilogue. */
3430 thread_prologue_and_epilogue_insns (insns
);
3434 TIMEVAR (flow2_time
,
3436 cleanup_cfg (insns
);
3437 life_analysis (insns
, max_reg_num (), rtl_dump_file
, 1);
3440 /* This is kind of heruistics. We need to run combine_stack_adjustments
3441 even for machines with possibly nonzero RETURN_POPS_ARGS
3442 and ACCUMULATE_OUTGOING_ARGS. We expect that only ports having
3443 push instructions will have popping returns. */
3444 #ifndef PUSH_ROUNDING
3445 if (!ACCUMULATE_OUTGOING_ARGS
)
3447 TIMEVAR (flow2_time
, { combine_stack_adjustments (); });
3453 flow2_completed
= 1;
3455 close_dump_file (DFI_flow2
, print_rtl_with_bb
, insns
);
3457 #ifdef HAVE_peephole2
3458 if (optimize
> 0 && flag_peephole2
)
3460 open_dump_file (DFI_peephole2
, decl
);
3462 TIMEVAR (peephole2_time
, peephole2_optimize (rtl_dump_file
));
3464 close_dump_file (DFI_peephole2
, print_rtl_with_bb
, insns
);
3468 #ifdef INSN_SCHEDULING
3469 if (optimize
> 0 && flag_schedule_insns_after_reload
)
3471 open_dump_file (DFI_sched2
, decl
);
3473 /* Do control and data sched analysis again,
3474 and write some more of the results to dump file. */
3476 TIMEVAR (sched2_time
, schedule_insns (rtl_dump_file
));
3478 close_dump_file (DFI_sched2
, print_rtl_with_bb
, insns
);
3485 #ifdef LEAF_REGISTERS
3486 current_function_uses_only_leaf_regs
3487 = optimize
> 0 && only_leaf_regs_used () && leaf_function_p ();
3490 if (optimize
> 0 && flag_reorder_blocks
)
3492 open_dump_file (DFI_bbro
, decl
);
3494 TIMEVAR (reorder_blocks_time
, reorder_basic_blocks ());
3496 close_dump_file (DFI_bbro
, print_rtl_with_bb
, insns
);
3499 if (optimize
> 0 && flag_rename_registers
)
3501 open_dump_file (DFI_rnreg
, decl
);
3503 TIMEVAR (rename_registers_time
, regrename_optimize ());
3505 close_dump_file (DFI_rnreg
, print_rtl_with_bb
, insns
);
3508 /* One more attempt to remove jumps to .+1 left by dead-store elimination.
3509 Also do cross-jumping this time and delete no-op move insns. */
3513 open_dump_file (DFI_jump2
, decl
);
3515 TIMEVAR (jump_time
, jump_optimize (insns
, JUMP_CROSS_JUMP
,
3517 !JUMP_AFTER_REGSCAN
));
3519 close_dump_file (DFI_jump2
, print_rtl_with_bb
, insns
);
3522 /* If a machine dependent reorganization is needed, call it. */
3523 #ifdef MACHINE_DEPENDENT_REORG
3524 open_dump_file (DFI_mach
, decl
);
3526 MACHINE_DEPENDENT_REORG (insns
);
3528 close_dump_file (DFI_mach
, print_rtl_with_bb
, insns
);
3534 /* If a scheduling pass for delayed branches is to be done,
3535 call the scheduling code. */
3538 if (optimize
> 0 && flag_delayed_branch
)
3540 open_dump_file (DFI_dbr
, decl
);
3545 dbr_schedule (insns
, rtl_dump_file
);
3548 close_dump_file (DFI_dbr
, print_rtl_with_bb
, insns
);
3555 /* Shorten branches.
3557 Note this must run before reg-stack because of death note (ab)use
3558 in the ia32 backend. */
3559 TIMEVAR (shorten_branch_time
, shorten_branches (get_insns ()));
3562 open_dump_file (DFI_stack
, decl
);
3564 TIMEVAR (stack_reg_time
, reg_to_stack (insns
, rtl_dump_file
));
3566 close_dump_file (DFI_stack
, print_rtl_with_bb
, insns
);
3572 current_function_nothrow
= nothrow_function_p ();
3573 if (current_function_nothrow
)
3574 /* Now we know that this can't throw; set the flag for the benefit
3575 of other functions later in this translation unit. */
3576 TREE_NOTHROW (current_function_decl
) = 1;
3578 /* Now turn the rtl into assembler code. */
3580 TIMEVAR (final_time
,
3585 /* Get the function's name, as described by its RTL.
3586 This may be different from the DECL_NAME name used
3587 in the source file. */
3589 x
= DECL_RTL (decl
);
3590 if (GET_CODE (x
) != MEM
)
3593 if (GET_CODE (x
) != SYMBOL_REF
)
3595 fnname
= XSTR (x
, 0);
3597 assemble_start_function (decl
, fnname
);
3598 final_start_function (insns
, asm_out_file
, optimize
);
3599 final (insns
, asm_out_file
, optimize
, 0);
3600 final_end_function (insns
, asm_out_file
, optimize
);
3601 assemble_end_function (decl
, fnname
);
3603 fflush (asm_out_file
);
3605 /* Release all memory allocated by flow. */
3606 free_basic_block_vars (0);
3608 /* Release all memory held by regsets now */
3609 regset_release_memory ();
3615 /* Write DBX symbols if requested */
3617 /* Note that for those inline functions where we don't initially
3618 know for certain that we will be generating an out-of-line copy,
3619 the first invocation of this routine (rest_of_compilation) will
3620 skip over this code by doing a `goto exit_rest_of_compilation;'.
3621 Later on, finish_compilation will call rest_of_compilation again
3622 for those inline functions that need to have out-of-line copies
3623 generated. During that call, we *will* be routed past here. */
3625 #ifdef DBX_DEBUGGING_INFO
3626 if (write_symbols
== DBX_DEBUG
)
3627 TIMEVAR (symout_time
, dbxout_function (decl
));
3630 #ifdef DWARF_DEBUGGING_INFO
3631 if (write_symbols
== DWARF_DEBUG
)
3632 TIMEVAR (symout_time
, dwarfout_file_scope_decl (decl
, 0));
3635 #ifdef DWARF2_DEBUGGING_INFO
3636 if (write_symbols
== DWARF2_DEBUG
)
3637 TIMEVAR (symout_time
, dwarf2out_decl (decl
));
3640 exit_rest_of_compilation
:
3642 /* In case the function was not output,
3643 don't leave any temporary anonymous types
3644 queued up for sdb output. */
3645 #ifdef SDB_DEBUGGING_INFO
3646 if (write_symbols
== SDB_DEBUG
)
3647 sdbout_types (NULL_TREE
);
3650 reload_completed
= 0;
3651 flow2_completed
= 0;
3654 TIMEVAR (final_time
,
3656 /* Clear out the insn_length contents now that they are no
3658 init_insn_lengths ();
3660 /* Clear out the real_constant_chain before some of the rtx's
3661 it runs through become garbage. */
3662 clear_const_double_mem ();
3664 /* Cancel the effect of rtl_in_current_obstack. */
3665 resume_temporary_allocation ();
3667 /* Show no temporary slots allocated. */
3670 free_basic_block_vars (0);
3673 /* Make sure volatile mem refs aren't considered valid operands for
3674 arithmetic insns. We must call this here if this is a nested inline
3675 function, since the above code leaves us in the init_recog state
3676 (from final.c), and the function context push/pop code does not
3677 save/restore volatile_ok.
3679 ??? Maybe it isn't necessary for expand_start_function to call this
3680 anymore if we do it here? */
3682 init_recog_no_volatile ();
3684 /* We're done with this function. Free up memory if we can. */
3685 free_after_parsing (cfun
);
3686 if (! DECL_DEFER_OUTPUT (decl
))
3687 free_after_compilation (cfun
);
3693 /* The parsing time is all the time spent in yyparse
3694 *except* what is spent in this function. */
3696 parse_time
-= get_run_time () - start_time
;
3707 printf ("Usage: %s input [switches]\n", progname
);
3708 printf ("Switches:\n");
3710 printf (" -ffixed-<register> Mark <register> as being unavailable to the compiler\n");
3711 printf (" -fcall-used-<register> Mark <register> as being corrupted by function calls\n");
3712 printf (" -fcall-saved-<register> Mark <register> as being preserved across functions\n");
3713 printf (" -finline-limit=<number> Limits the size of inlined functions to <number>\n");
3715 for (i
= NUM_ELEM (f_options
); i
--;)
3717 const char * description
= f_options
[i
].description
;
3719 if (description
!= NULL
&& * description
!= 0)
3720 printf (" -f%-21s %s\n",
3721 f_options
[i
].string
, description
);
3724 printf (" -O[number] Set optimisation level to [number]\n");
3725 printf (" -Os Optimise for space rather than speed\n");
3726 printf (" -pedantic Issue warnings needed by strict compliance to ANSI C\n");
3727 printf (" -pedantic-errors Like -pedantic except that errors are produced\n");
3728 printf (" -w Suppress warnings\n");
3729 printf (" -W Enable extra warnings\n");
3731 for (i
= NUM_ELEM (W_options
); i
--;)
3733 const char * description
= W_options
[i
].description
;
3735 if (description
!= NULL
&& * description
!= 0)
3736 printf (" -W%-21s %s\n",
3737 W_options
[i
].string
, description
);
3740 printf (" -Wid-clash-<num> Warn if 2 identifiers have the same first <num> chars\n");
3741 printf (" -Wlarger-than-<number> Warn if an object is larger than <number> bytes\n");
3742 printf (" -p Enable function profiling\n");
3743 #if defined (BLOCK_PROFILER) || defined (FUNCTION_BLOCK_PROFILER)
3744 printf (" -a Enable block profiling \n");
3746 #if defined (BLOCK_PROFILER) || defined (FUNCTION_BLOCK_PROFILER) || defined FUNCTION_BLOCK_PROFILER_EXIT
3747 printf (" -ax Enable jump profiling \n");
3749 printf (" -o <file> Place output into <file> \n");
3750 printf (" -G <number> Put global and static data smaller than <number>\n");
3751 printf (" bytes into a special section (on some targets)\n");
3753 for (i
= NUM_ELEM (debug_args
); i
--;)
3755 if (debug_args
[i
].description
!= NULL
)
3756 printf (" -g%-21s %s\n", debug_args
[i
].arg
, debug_args
[i
].description
);
3759 printf (" -aux-info <file> Emit declaration info into <file>.X\n");
3760 printf (" -quiet Do not display functions compiled or elapsed time\n");
3761 printf (" -version Display the compiler's version\n");
3762 printf (" -d[letters] Enable dumps from specific passes of the compiler\n");
3763 printf (" -dumpbase <file> Base name to be used for dumps from specific passes\n");
3764 #if defined INSN_SCHEDULING
3765 printf (" -fsched-verbose=<number> Set the verbosity level of the scheduler\n");
3767 printf (" --help Display this information\n");
3772 /* Display descriptions of language specific options.
3773 If there is no description, note that there is an undocumented option.
3774 If the description is empty, do not display anything. (This allows
3775 options to be deliberately undocumented, for whatever reason).
3776 If the option string is missing, then this is a marker, indicating
3777 that the description string is in fact the name of a language, whose
3778 language specific options are to follow. */
3780 if (NUM_ELEM (documented_lang_options
) > 1)
3782 printf ("\nLanguage specific options:\n");
3784 for (i
= 0; i
< NUM_ELEM (documented_lang_options
); i
++)
3786 const char * description
= documented_lang_options
[i
].description
;
3787 const char * option
= documented_lang_options
[i
].option
;
3789 if (description
== NULL
)
3794 printf (" %-23.23s [undocumented]\n", option
);
3796 else if (* description
== 0)
3798 else if (option
== NULL
)
3802 ("\nThere are undocumented %s specific options as well.\n",
3806 printf ("\n Options for %s:\n", description
);
3811 printf (" %-23.23s %s\n", option
, description
);
3816 printf ("\nThere are undocumented %s specific options as well.\n", lang
);
3818 if (NUM_ELEM (target_switches
) > 1
3819 #ifdef TARGET_OPTIONS
3820 || NUM_ELEM (target_options
) > 1
3828 printf ("\nTarget specific options:\n");
3830 for (i
= NUM_ELEM (target_switches
); i
--;)
3832 const char * option
= target_switches
[i
].name
;
3833 const char * description
= target_switches
[i
].description
;
3835 if (option
== NULL
|| * option
== 0)
3837 else if (description
== NULL
)
3842 printf (" -m%-21.21s [undocumented]\n", option
);
3844 else if (* description
!= 0)
3845 doc
+= printf (" -m%-21.21s %s\n", option
, description
);
3848 #ifdef TARGET_OPTIONS
3849 for (i
= NUM_ELEM (target_options
); i
--;)
3851 const char * option
= target_options
[i
].prefix
;
3852 const char * description
= target_options
[i
].description
;
3854 if (option
== NULL
|| * option
== 0)
3856 else if (description
== NULL
)
3861 printf (" -m%-21.21s [undocumented]\n", option
);
3863 else if (* description
!= 0)
3864 doc
+= printf (" -m%-21.21s %s\n", option
, description
);
3870 printf ("\nThere are undocumented target specific options as well.\n");
3872 printf (" They exist, but they are not documented.\n");
3877 /* Parse a -d... comand line switch. */
3880 decode_d_option (arg
)
3889 for (i
= 0; i
< DFI_MAX
; ++i
)
3890 dump_file
[i
].enabled
= 1;
3899 flag_print_asm_name
= 1;
3902 graph_dump_format
= vcg
;
3905 rtl_dump_and_exit
= 1;
3910 case 'D': /* These are handled by the preprocessor. */
3916 for (i
= 0; i
< DFI_MAX
; ++i
)
3917 if (c
== dump_file
[i
].debug_switch
)
3919 dump_file
[i
].enabled
= 1;
3924 warning ("unrecognized gcc debugging option: %c", c
);
3929 /* Parse a -f... comand line switch. ARG is the value after the -f.
3930 It is safe to access 'ARG - 2' to generate the full switch name.
3931 Return the number of strings consumed. */
3934 decode_f_option (arg
)
3939 /* Search for the option in the table of binary f options. */
3940 for (j
= sizeof (f_options
) / sizeof (f_options
[0]); j
--;)
3942 if (!strcmp (arg
, f_options
[j
].string
))
3944 *f_options
[j
].variable
= f_options
[j
].on_value
;
3948 if (arg
[0] == 'n' && arg
[1] == 'o' && arg
[2] == '-'
3949 && ! strcmp (arg
+ 3, f_options
[j
].string
))
3951 *f_options
[j
].variable
= ! f_options
[j
].on_value
;
3956 if (!strncmp (arg
, "inline-limit-", 13)
3957 || !strncmp (arg
, "inline-limit=", 13))
3959 read_integral_parameter (arg
+ 13, arg
- 2, inline_max_insns
);
3960 #ifdef INSN_SCHEDULING
3961 else if (!strncmp (arg
, "sched-verbose=", 14))
3962 fix_sched_param ("verbose", (const char *)(arg
+ 14));
3964 else if (!strncmp (arg
, "fixed-", 6))
3965 fix_register ((const char *)(arg
+ 6), 1, 1);
3966 else if (!strncmp (arg
, "call-used-", 10))
3967 fix_register ((const char *)(arg
+ 10), 0, 1);
3968 else if (!strncmp (arg
, "call-saved-", 11))
3969 fix_register ((const char *)(arg
+ 11), 0, 0);
3970 else if (!strncmp (arg
, "align-loops=", 12))
3971 align_loops
= read_integral_parameter (arg
+ 12, arg
- 2, align_loops
);
3972 else if (!strncmp (arg
, "align-functions=", 16))
3974 = read_integral_parameter (arg
+ 16, arg
- 2, align_functions
);
3975 else if (!strncmp (arg
, "align-jumps=", 12))
3976 align_jumps
= read_integral_parameter (arg
+ 12, arg
- 2, align_jumps
);
3977 else if (!strncmp (arg
, "align-labels=", 13))
3978 align_labels
= read_integral_parameter (arg
+ 13, arg
- 2, align_labels
);
3979 else if (!strncmp (arg
, "stack-limit-register=", 21))
3981 int reg
= decode_reg_name (arg
+ 21);
3983 error ("unrecognized register name `%s'", arg
+ 21);
3985 stack_limit_rtx
= gen_rtx_REG (Pmode
, reg
);
3987 else if (!strncmp (arg
, "stack-limit-symbol=", 19))
3991 nm
= ggc_alloc_string (arg
+ 19, strlen (arg
+ 19));
3993 nm
= xstrdup (arg
+ 19);
3994 stack_limit_rtx
= gen_rtx_SYMBOL_REF (Pmode
, nm
);
3996 else if (!strcmp (arg
, "no-stack-limit"))
3997 stack_limit_rtx
= NULL_RTX
;
3998 else if (!strcmp (arg
, "preprocessed"))
3999 /* Recognise this switch but do nothing. This prevents warnings
4000 about an unrecognized switch if cpplib has not been linked in. */
4008 /* Parse a -W... comand line switch. ARG is the value after the -W.
4009 It is safe to access 'ARG - 2' to generate the full switch name.
4010 Return the number of strings consumed. */
4013 decode_W_option (arg
)
4018 /* Search for the option in the table of binary W options. */
4020 for (j
= sizeof (W_options
) / sizeof (W_options
[0]); j
--;)
4022 if (!strcmp (arg
, W_options
[j
].string
))
4024 *W_options
[j
].variable
= W_options
[j
].on_value
;
4028 if (arg
[0] == 'n' && arg
[1] == 'o' && arg
[2] == '-'
4029 && ! strcmp (arg
+ 3, W_options
[j
].string
))
4031 *W_options
[j
].variable
= ! W_options
[j
].on_value
;
4036 if (!strncmp (arg
, "id-clash-", 9))
4038 id_clash_len
= read_integral_parameter (arg
+ 9, arg
- 2, -1);
4040 if (id_clash_len
!= -1)
4043 else if (!strncmp (arg
, "larger-than-", 12))
4045 larger_than_size
= read_integral_parameter (arg
+ 12, arg
- 2, -1);
4047 if (larger_than_size
!= -1)
4048 warn_larger_than
= 1;
4056 /* Parse a -g... comand line switch. ARG is the value after the -g.
4057 It is safe to access 'ARG - 2' to generate the full switch name.
4058 Return the number of strings consumed. */
4061 decode_g_option (arg
)
4065 /* A lot of code assumes write_symbols == NO_DEBUG if the
4066 debugging level is 0 (thus -gstabs1 -gstabs0 would lose track
4067 of what debugging type has been selected). This records the
4068 selected type. It is an error to specify more than one
4070 static enum debug_info_type selected_debug_type
= NO_DEBUG
;
4071 /* Non-zero if debugging format has been explicitly set.
4072 -g and -ggdb don't explicitly set the debugging format so
4073 -gdwarf -g3 is equivalent to -gdwarf3. */
4074 static int type_explicitly_set_p
= 0;
4075 /* Indexed by enum debug_info_type. */
4076 static const char * debug_type_names
[] =
4078 "none", "stabs", "coff", "dwarf-1", "dwarf-2", "xcoff"
4081 /* The maximum admissible debug level value. */
4082 static const unsigned max_debug_level
= 3;
4084 /* Look up ARG in the table. */
4085 for (da
= debug_args
; da
->arg
; da
++)
4087 const int da_len
= strlen (da
->arg
);
4089 if (da_len
== 0 || ! strncmp (arg
, da
->arg
, da_len
))
4091 enum debug_info_type type
= da
->debug_type
;
4092 const char * p
= arg
+ da_len
;
4094 if (*p
&& (*p
< '0' || *p
> '9'))
4097 /* A debug flag without a level defaults to level 2.
4098 Note we do not want to call read_integral_parameter
4099 for that case since it will call atoi which
4102 ??? We may want to generalize the interface to
4103 read_integral_parameter to better handle this case
4104 if this case shows up often. */
4106 level
= read_integral_parameter (p
, 0, max_debug_level
+ 1);
4110 if (da_len
> 1 && *p
&& !strncmp (arg
, "dwarf", da_len
))
4112 error ("use -gdwarf -g%d for DWARF v1, level %d",
4115 error ("use -gdwarf-2 for DWARF v2");
4118 if (level
> max_debug_level
)
4121 ignoring option `%s' due to invalid debug level specification",
4123 level
= debug_info_level
;
4126 if (type
== NO_DEBUG
)
4128 type
= PREFERRED_DEBUGGING_TYPE
;
4130 if (da_len
> 1 && strncmp (arg
, "gdb", da_len
) == 0)
4132 #if defined (DWARF2_DEBUGGING_INFO) && !defined (LINKER_DOES_NOT_WORK_WITH_DWARF2)
4133 type
= DWARF2_DEBUG
;
4135 #ifdef DBX_DEBUGGING_INFO
4142 if (type
== NO_DEBUG
)
4143 warning ("`%s': unknown or unsupported -g option", arg
- 2);
4145 /* Does it conflict with an already selected type? */
4146 if (type_explicitly_set_p
4147 /* -g/-ggdb don't conflict with anything */
4148 && da
->debug_type
!= NO_DEBUG
4149 && type
!= selected_debug_type
)
4150 warning ("`%s' ignored, conflicts with `-g%s'",
4151 arg
- 2, debug_type_names
[(int) selected_debug_type
]);
4154 /* If the format has already been set, -g/-ggdb
4155 only change the debug level. */
4156 if (type_explicitly_set_p
&& da
->debug_type
== NO_DEBUG
)
4157 ; /* don't change debugging type */
4160 selected_debug_type
= type
;
4161 type_explicitly_set_p
= da
->debug_type
!= NO_DEBUG
;
4164 write_symbols
= (level
== 0
4166 : selected_debug_type
);
4167 use_gnu_debug_info_extensions
= da
->use_extensions_p
;
4168 debug_info_level
= (enum debug_info_level
) level
;
4176 warning ("`%s': unknown or unsupported -g option", arg
- 2);
4181 /* Decode the first argument in the argv as a language-independent option.
4182 Return the number of strings consumed. 'strings_processed' is the
4183 number of strings that have already been decoded in a language
4184 specific fashion before this function was invoked. */
4187 independent_decode_option (argc
, argv
, strings_processed
)
4190 unsigned int strings_processed
;
4192 char *arg
= argv
[0];
4194 if (arg
[0] != '-' || arg
[1] == 0)
4206 if (!strcmp (arg
, "-help"))
4221 /* Already been treated in main (). Do nothing. */
4225 set_target_switch (arg
+ 1);
4229 return decode_f_option (arg
+ 1);
4232 if (strings_processed
== 0)
4233 return decode_g_option (arg
+ 1);
4235 return strings_processed
;
4238 if (!strcmp (arg
, "dumpbase"))
4243 dump_base_name
= argv
[1];
4247 decode_d_option (arg
+ 1);
4251 if (!strcmp (arg
, "pedantic"))
4253 else if (!strcmp (arg
, "pedantic-errors"))
4254 flag_pedantic_errors
= pedantic
= 1;
4255 else if (arg
[1] == 0)
4262 if (!strcmp (arg
, "quiet"))
4269 if (!strcmp (arg
, "version"))
4277 inhibit_warnings
= 1;
4286 /* We save the value of warn_uninitialized, since if they put
4287 -Wuninitialized on the command line, we need to generate a
4288 warning about not using it without also specifying -O. */
4289 if (warn_uninitialized
!= 1)
4290 warn_uninitialized
= 2;
4293 return decode_W_option (arg
+ 1);
4299 #if !defined (BLOCK_PROFILER) || !defined (FUNCTION_BLOCK_PROFILER)
4300 warning ("`-a' option (basic block profile) not supported");
4302 profile_block_flag
= (profile_block_flag
< 2) ? 1 : 3;
4305 else if (!strcmp (arg
, "ax"))
4307 #if !defined (FUNCTION_BLOCK_PROFILER_EXIT) || !defined (BLOCK_PROFILER) || !defined (FUNCTION_BLOCK_PROFILER)
4308 warning ("`-ax' option (jump profiling) not supported");
4310 profile_block_flag
= (!profile_block_flag
4311 || profile_block_flag
== 2) ? 2 : 3;
4314 else if (!strncmp (arg
, "aux-info", 8))
4316 flag_gen_aux_info
= 1;
4322 aux_info_file_name
= argv
[1];
4326 aux_info_file_name
= arg
+ 8;
4338 asm_file_name
= argv
[1];
4353 g_switch_val
= read_integral_parameter (argv
[1], 0, -1);
4358 g_switch_val
= read_integral_parameter (arg
+ 1, 0, -1);
4362 if (g_switch_val
== -1)
4366 g_switch_set
= TRUE
;
4367 g_switch_value
= g_switch_val
;
4377 /* Entry point of cc1/c++. Decode command args, then call compile_file.
4378 Exit code is 35 if can't open files, 34 if fatal error,
4379 33 if had nonfatal errors, else success. */
4381 extern int main
PARAMS ((int, char **));
4391 /* save in case md file wants to emit args as a comment. */
4395 p
= argv
[0] + strlen (argv
[0]);
4396 while (p
!= argv
[0] && p
[-1] != '/'
4397 #ifdef DIR_SEPARATOR
4398 && p
[-1] != DIR_SEPARATOR
4404 #ifdef HAVE_LC_MESSAGES
4405 setlocale (LC_MESSAGES
, "");
4407 (void) bindtextdomain (PACKAGE
, localedir
);
4408 (void) textdomain (PACKAGE
);
4410 signal (SIGFPE
, float_signal
);
4413 signal (SIGPIPE
, pipe_closed
);
4416 decl_printable_name
= decl_name
;
4417 lang_expand_expr
= (lang_expand_expr_t
) do_abort
;
4419 /* Initialize whether `char' is signed. */
4420 flag_signed_char
= DEFAULT_SIGNED_CHAR
;
4421 #ifdef DEFAULT_SHORT_ENUMS
4422 /* Initialize how much space enums occupy, by default. */
4423 flag_short_enums
= DEFAULT_SHORT_ENUMS
;
4426 /* Initialize the garbage-collector. */
4428 ggc_add_root (&input_file_stack
, 1, sizeof input_file_stack
,
4430 ggc_add_rtx_root (&stack_limit_rtx
, 1);
4431 ggc_add_tree_root (¤t_function_decl
, 1);
4432 ggc_add_tree_root (¤t_function_func_begin_label
, 1);
4434 /* Perform language-specific options intialization. */
4435 lang_init_options ();
4437 /* Scan to see what optimization level has been specified. That will
4438 determine the default value of many flags. */
4439 for (i
= 1; i
< argc
; i
++)
4441 if (!strcmp (argv
[i
], "-O"))
4446 else if (argv
[i
][0] == '-' && argv
[i
][1] == 'O')
4448 /* Handle -Os, -O2, -O3, -O69, ... */
4449 char *p
= &argv
[i
][2];
4451 if ((p
[0] == 's') && (p
[1] == 0))
4455 /* Optimizing for size forces optimize to be 2. */
4460 const int optimize_val
= read_integral_parameter (p
, p
- 2, -1);
4461 if (optimize_val
!= -1)
4463 optimize
= optimize_val
;
4473 flag_thread_jumps
= 1;
4475 flag_delayed_branch
= 1;
4477 #ifdef CAN_DEBUG_WITHOUT_FP
4478 flag_omit_frame_pointer
= 1;
4484 flag_optimize_sibling_calls
= 1;
4485 flag_cse_follow_jumps
= 1;
4486 flag_cse_skip_blocks
= 1;
4488 flag_expensive_optimizations
= 1;
4489 flag_strength_reduce
= 1;
4490 flag_rerun_cse_after_loop
= 1;
4491 flag_rerun_loop_opt
= 1;
4492 flag_caller_saves
= 1;
4495 #ifdef INSN_SCHEDULING
4496 flag_schedule_insns
= 1;
4497 flag_schedule_insns_after_reload
= 1;
4500 flag_strict_aliasing
= 1;
4501 flag_delete_null_pointer_checks
= 1;
4506 flag_inline_functions
= 1;
4509 if (optimize
< 2 || optimize_size
)
4514 align_functions
= 1;
4517 /* Initialize target_flags before OPTIMIZATION_OPTIONS so the latter can
4520 set_target_switch ("");
4522 #ifdef OPTIMIZATION_OPTIONS
4523 /* Allow default optimizations to be specified on a per-machine basis. */
4524 OPTIMIZATION_OPTIONS (optimize
, optimize_size
);
4527 /* Initialize register usage now so switches may override. */
4530 /* Perform normal command line switch decoding. */
4531 for (i
= 1; i
< argc
;)
4533 unsigned int lang_processed
;
4534 unsigned int indep_processed
;
4536 /* Give the language a chance to decode the option for itself. */
4537 lang_processed
= lang_decode_option (argc
- i
, argv
+ i
);
4539 /* Now see if the option also has a language independent meaning.
4540 Some options are both language specific and language independent,
4541 eg --help. It is possible that there might be options that should
4542 only be decoded in a language independent way if they were not
4543 decoded in a langauge specific way, which is why 'lang_processed'
4545 indep_processed
= independent_decode_option (argc
- i
, argv
+ i
,
4548 if (lang_processed
|| indep_processed
)
4549 i
+= (lang_processed
> indep_processed
4550 ? lang_processed
: indep_processed
);
4553 const char * option
= NULL
;
4554 const char * lang
= NULL
;
4557 /* It is possible that the command line switch is not valid for the
4558 current language, but it is valid for another language. In order
4559 to be compatible with previous versions of the compiler (which
4560 did not issue an error message in this case) we check for this
4561 possibilty here. If we do find a match, then if extra_warnings
4562 is set we generate a warning message, otherwise we will just
4563 ignore the option. */
4564 for (j
= 0; j
< NUM_ELEM (documented_lang_options
); j
++)
4566 option
= documented_lang_options
[j
].option
;
4569 lang
= documented_lang_options
[j
].description
;
4570 else if (! strncmp (argv
[i
], option
, strlen (option
)))
4574 if (j
!= NUM_ELEM (documented_lang_options
))
4578 warning ("Ignoring command line option '%s'", argv
[i
]);
4581 (It is valid for %s but not the selected langauge)", lang
);
4585 error ("Unrecognized option `%s'", argv
[i
]);
4591 /* Checker uses the frame pointer. */
4592 if (flag_check_memory_usage
)
4593 flag_omit_frame_pointer
= 0;
4597 /* Inlining does not work if not optimizing,
4598 so force it not to be done. */
4602 /* The c_decode_option and lang_decode_option functions set
4603 this to `2' if -Wall is used, so we can avoid giving out
4604 lots of errors for people who don't realize what -Wall does. */
4605 if (warn_uninitialized
== 1)
4606 warning ("-Wuninitialized is not supported without -O");
4609 #ifdef OVERRIDE_OPTIONS
4610 /* Some machines may reject certain combinations of options. */
4614 if (exceptions_via_longjmp
== 2)
4616 #ifdef DWARF2_UNWIND_INFO
4617 exceptions_via_longjmp
= ! DWARF2_UNWIND_INFO
;
4619 exceptions_via_longjmp
= 1;
4623 /* Set up the align_*_log variables, defaulting them to 1 if they
4624 were still unset. */
4625 if (align_loops
<= 0) align_loops
= 1;
4626 align_loops_log
= floor_log2 (align_loops
*2-1);
4627 if (align_jumps
<= 0) align_jumps
= 1;
4628 align_jumps_log
= floor_log2 (align_jumps
*2-1);
4629 if (align_labels
<= 0) align_labels
= 1;
4630 align_labels_log
= floor_log2 (align_labels
*2-1);
4631 if (align_functions
<= 0) align_functions
= 1;
4632 align_functions_log
= floor_log2 (align_functions
*2-1);
4634 if (profile_block_flag
== 3)
4636 warning ("`-ax' and `-a' are conflicting options. `-a' ignored.");
4637 profile_block_flag
= 2;
4640 /* Unrolling all loops implies that standard loop unrolling must also
4642 if (flag_unroll_all_loops
)
4643 flag_unroll_loops
= 1;
4644 /* Loop unrolling requires that strength_reduction be on also. Silently
4645 turn on strength reduction here if it isn't already on. Also, the loop
4646 unrolling code assumes that cse will be run after loop, so that must
4647 be turned on also. */
4648 if (flag_unroll_loops
)
4650 flag_strength_reduce
= 1;
4651 flag_rerun_cse_after_loop
= 1;
4654 /* Warn about options that are not supported on this machine. */
4655 #ifndef INSN_SCHEDULING
4656 if (flag_schedule_insns
|| flag_schedule_insns_after_reload
)
4657 warning ("instruction scheduling not supported on this target machine");
4660 if (flag_delayed_branch
)
4661 warning ("this target machine does not have delayed branches");
4664 user_label_prefix
= USER_LABEL_PREFIX
;
4665 if (flag_leading_underscore
!= -1)
4667 /* If the default prefix is more complicated than "" or "_",
4668 issue a warning and ignore this option. */
4669 if (user_label_prefix
[0] == 0 ||
4670 (user_label_prefix
[0] == '_' && user_label_prefix
[1] == 0))
4672 user_label_prefix
= flag_leading_underscore
? "_" : "";
4675 warning ("-f%sleading-underscore not supported on this target machine",
4676 flag_leading_underscore
? "" : "no-");
4679 /* If we are in verbose mode, write out the version and maybe all the
4680 option flags in use. */
4683 print_version (stderr
, "");
4685 print_switch_values (stderr
, 0, MAX_LINE
, "", " ", "\n");
4688 compile_file (filename
);
4690 #if !defined(OS2) && !defined(VMS) && (!defined(_WIN32) || defined (__CYGWIN__)) && !defined(__INTERIX)
4693 char *lim
= (char *) sbrk (0);
4695 fnotice (stderr
, "Data size %ld.\n", (long) (lim
- (char *) &environ
));
4700 system ("ps -l 1>&2");
4703 #endif /* not USG */
4706 #endif /* ! OS2 && ! VMS && (! _WIN32 || CYGWIN) && ! __INTERIX */
4709 return (FATAL_EXIT_CODE
);
4711 return (FATAL_EXIT_CODE
);
4712 return (SUCCESS_EXIT_CODE
);
4715 /* Decode -m switches. */
4716 /* Decode the switch -mNAME. */
4719 set_target_switch (name
)
4723 int valid_target_option
= 0;
4725 for (j
= 0; j
< sizeof target_switches
/ sizeof target_switches
[0]; j
++)
4726 if (!strcmp (target_switches
[j
].name
, name
))
4728 if (target_switches
[j
].value
< 0)
4729 target_flags
&= ~-target_switches
[j
].value
;
4731 target_flags
|= target_switches
[j
].value
;
4732 valid_target_option
= 1;
4735 #ifdef TARGET_OPTIONS
4736 if (!valid_target_option
)
4737 for (j
= 0; j
< sizeof target_options
/ sizeof target_options
[0]; j
++)
4739 int len
= strlen (target_options
[j
].prefix
);
4740 if (!strncmp (target_options
[j
].prefix
, name
, len
))
4742 *target_options
[j
].variable
= name
+ len
;
4743 valid_target_option
= 1;
4748 if (!valid_target_option
)
4749 error ("Invalid option `%s'", name
);
4752 /* Print version information to FILE.
4753 Each line begins with INDENT (for the case where FILE is the
4754 assembler output file). */
4757 print_version (file
, indent
)
4762 #define __VERSION__ "[?]"
4766 "%s%s%s version %s (%s) compiled by GNU C version %s.\n"
4768 "%s%s%s version %s (%s) compiled by CC.\n"
4770 , indent
, *indent
!= 0 ? " " : "",
4771 language_string
, version_string
, TARGET_NAME
, __VERSION__
);
4774 /* Print an option value and return the adjusted position in the line.
4775 ??? We don't handle error returns from fprintf (disk full); presumably
4776 other code will catch a disk full though. */
4779 print_single_switch (file
, pos
, max
, indent
, sep
, term
, type
, name
)
4782 const char *indent
, *sep
, *term
, *type
, *name
;
4784 /* The ultrix fprintf returns 0 on success, so compute the result we want
4785 here since we need it for the following test. */
4786 int len
= strlen (sep
) + strlen (type
) + strlen (name
);
4791 fprintf (file
, "%s", term
);
4796 fprintf (file
, "%s", indent
);
4797 pos
= strlen (indent
);
4799 fprintf (file
, "%s%s%s", sep
, type
, name
);
4804 /* Print active target switches to FILE.
4805 POS is the current cursor position and MAX is the size of a "line".
4806 Each line begins with INDENT and ends with TERM.
4807 Each switch is separated from the next by SEP. */
4810 print_switch_values (file
, pos
, max
, indent
, sep
, term
)
4813 const char *indent
, *sep
, *term
;
4818 /* Print the options as passed. */
4820 pos
= print_single_switch (file
, pos
, max
, indent
, *indent
? " " : "", term
,
4821 _("options passed: "), "");
4823 for (p
= &save_argv
[1]; *p
!= NULL
; p
++)
4827 if (strcmp (*p
, "-o") == 0)
4833 if (strcmp (*p
, "-quiet") == 0)
4835 if (strcmp (*p
, "-version") == 0)
4840 pos
= print_single_switch (file
, pos
, max
, indent
, sep
, term
, *p
, "");
4843 fprintf (file
, "%s", term
);
4845 /* Print the -f and -m options that have been enabled.
4846 We don't handle language specific options but printing argv
4849 pos
= print_single_switch (file
, 0, max
, indent
, *indent
? " " : "", term
,
4850 _("options enabled: "), "");
4852 for (j
= 0; j
< sizeof f_options
/ sizeof f_options
[0]; j
++)
4853 if (*f_options
[j
].variable
== f_options
[j
].on_value
)
4854 pos
= print_single_switch (file
, pos
, max
, indent
, sep
, term
,
4855 "-f", f_options
[j
].string
);
4857 /* Print target specific options. */
4859 for (j
= 0; j
< sizeof target_switches
/ sizeof target_switches
[0]; j
++)
4860 if (target_switches
[j
].name
[0] != '\0'
4861 && target_switches
[j
].value
> 0
4862 && ((target_switches
[j
].value
& target_flags
)
4863 == target_switches
[j
].value
))
4865 pos
= print_single_switch (file
, pos
, max
, indent
, sep
, term
,
4866 "-m", target_switches
[j
].name
);
4869 #ifdef TARGET_OPTIONS
4870 for (j
= 0; j
< sizeof target_options
/ sizeof target_options
[0]; j
++)
4871 if (*target_options
[j
].variable
!= NULL
)
4874 sprintf (prefix
, "-m%s", target_options
[j
].prefix
);
4875 pos
= print_single_switch (file
, pos
, max
, indent
, sep
, term
,
4876 prefix
, *target_options
[j
].variable
);
4880 fprintf (file
, "%s", term
);
4883 /* Record the beginning of a new source file, named FILENAME. */
4886 debug_start_source_file (filename
)
4887 register char *filename ATTRIBUTE_UNUSED
;
4889 #ifdef DBX_DEBUGGING_INFO
4890 if (write_symbols
== DBX_DEBUG
)
4891 dbxout_start_new_source_file (filename
);
4893 #ifdef DWARF_DEBUGGING_INFO
4894 if (debug_info_level
== DINFO_LEVEL_VERBOSE
4895 && write_symbols
== DWARF_DEBUG
)
4896 dwarfout_start_new_source_file (filename
);
4897 #endif /* DWARF_DEBUGGING_INFO */
4898 #ifdef DWARF2_DEBUGGING_INFO
4899 if (debug_info_level
== DINFO_LEVEL_VERBOSE
4900 && write_symbols
== DWARF2_DEBUG
)
4901 dwarf2out_start_source_file (filename
);
4902 #endif /* DWARF2_DEBUGGING_INFO */
4903 #ifdef SDB_DEBUGGING_INFO
4904 if (write_symbols
== SDB_DEBUG
)
4905 sdbout_start_new_source_file (filename
);
4909 /* Record the resumption of a source file. LINENO is the line number in
4910 the source file we are returning to. */
4913 debug_end_source_file (lineno
)
4914 register unsigned lineno ATTRIBUTE_UNUSED
;
4916 #ifdef DBX_DEBUGGING_INFO
4917 if (write_symbols
== DBX_DEBUG
)
4918 dbxout_resume_previous_source_file ();
4920 #ifdef DWARF_DEBUGGING_INFO
4921 if (debug_info_level
== DINFO_LEVEL_VERBOSE
4922 && write_symbols
== DWARF_DEBUG
)
4923 dwarfout_resume_previous_source_file (lineno
);
4924 #endif /* DWARF_DEBUGGING_INFO */
4925 #ifdef DWARF2_DEBUGGING_INFO
4926 if (debug_info_level
== DINFO_LEVEL_VERBOSE
4927 && write_symbols
== DWARF2_DEBUG
)
4928 dwarf2out_end_source_file ();
4929 #endif /* DWARF2_DEBUGGING_INFO */
4930 #ifdef SDB_DEBUGGING_INFO
4931 if (write_symbols
== SDB_DEBUG
)
4932 sdbout_resume_previous_source_file ();
4936 /* Called from check_newline in c-parse.y. The `buffer' parameter contains
4937 the tail part of the directive line, i.e. the part which is past the
4938 initial whitespace, #, whitespace, directive-name, whitespace part. */
4941 debug_define (lineno
, buffer
)
4942 register unsigned lineno ATTRIBUTE_UNUSED
;
4943 register char *buffer ATTRIBUTE_UNUSED
;
4945 #ifdef DWARF_DEBUGGING_INFO
4946 if (debug_info_level
== DINFO_LEVEL_VERBOSE
4947 && write_symbols
== DWARF_DEBUG
)
4948 dwarfout_define (lineno
, buffer
);
4949 #endif /* DWARF_DEBUGGING_INFO */
4950 #ifdef DWARF2_DEBUGGING_INFO
4951 if (debug_info_level
== DINFO_LEVEL_VERBOSE
4952 && write_symbols
== DWARF2_DEBUG
)
4953 dwarf2out_define (lineno
, buffer
);
4954 #endif /* DWARF2_DEBUGGING_INFO */
4957 /* Called from check_newline in c-parse.y. The `buffer' parameter contains
4958 the tail part of the directive line, i.e. the part which is past the
4959 initial whitespace, #, whitespace, directive-name, whitespace part. */
4962 debug_undef (lineno
, buffer
)
4963 register unsigned lineno ATTRIBUTE_UNUSED
;
4964 register char *buffer ATTRIBUTE_UNUSED
;
4966 #ifdef DWARF_DEBUGGING_INFO
4967 if (debug_info_level
== DINFO_LEVEL_VERBOSE
4968 && write_symbols
== DWARF_DEBUG
)
4969 dwarfout_undef (lineno
, buffer
);
4970 #endif /* DWARF_DEBUGGING_INFO */
4971 #ifdef DWARF2_DEBUGGING_INFO
4972 if (debug_info_level
== DINFO_LEVEL_VERBOSE
4973 && write_symbols
== DWARF2_DEBUG
)
4974 dwarf2out_undef (lineno
, buffer
);
4975 #endif /* DWARF2_DEBUGGING_INFO */
4978 /* Tell the debugging backend that we've decided not to emit any
4979 debugging information for BLOCK, so it can clean up after any local
4980 classes or nested functions. */
4983 debug_ignore_block (block
)
4984 tree block ATTRIBUTE_UNUSED
;
4986 #ifdef DWARF2_DEBUGGING_INFO
4987 if (write_symbols
== DWARF2_DEBUG
)
4988 dwarf2out_ignore_block (block
);