1 /* Top level of GNU C compiler
2 Copyright (C) 1987, 1988, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
3 1999, 2000 Free Software Foundation, Inc.
5 This file is part of GNU CC.
7 GNU CC is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
12 GNU CC is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GNU CC; see the file COPYING. If not, write to
19 the Free Software Foundation, 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
22 /* This is the top level of cc1/c++.
23 It parses command args, opens files, invokes the various passes
24 in the proper order, and counts the time used by each.
25 Error messages and low-level interface to malloc also handled here. */
28 #undef FLOAT /* This is for hpux. They should change hpux. */
29 #undef FFS /* Some systems define this in param.h. */
34 #ifdef HAVE_SYS_RESOURCE_H
35 # include <sys/resource.h>
38 #ifdef HAVE_SYS_TIMES_H
39 # include <sys/times.h>
47 #include "insn-attr.h"
48 #include "insn-codes.h"
49 #include "insn-config.h"
50 #include "hard-reg-set.h"
58 #include "basic-block.h"
66 #ifndef ACCUMULATE_OUTGOING_ARGS
67 #define ACCUMULATE_OUTGOING_ARGS 0
70 #ifdef DWARF_DEBUGGING_INFO
74 #if defined (DWARF2_UNWIND_INFO) || defined (DWARF2_DEBUGGING_INFO)
75 #include "dwarf2out.h"
78 #if defined(DBX_DEBUGGING_INFO) || defined(XCOFF_DEBUGGING_INFO)
82 #ifdef SDB_DEBUGGING_INFO
86 #ifdef XCOFF_DEBUGGING_INFO
91 /* The extra parameters substantially improve the I/O performance. */
93 vms_fopen (fname
, type
)
97 /* The <stdio.h> in the gcc-vms-1.42 distribution prototypes fopen with two
98 fixed arguments, which matches ANSI's specification but not VAXCRTL's
99 pre-ANSI implementation. This hack circumvents the mismatch problem. */
100 FILE *(*vmslib_fopen
)() = (FILE *(*)()) fopen
;
103 return (*vmslib_fopen
) (fname
, type
, "mbc=32",
104 "deq=64", "fop=tef", "shr=nil");
106 return (*vmslib_fopen
) (fname
, type
, "mbc=32");
108 #define fopen vms_fopen
111 #ifndef DEFAULT_GDB_EXTENSIONS
112 #define DEFAULT_GDB_EXTENSIONS 1
115 /* If more than one debugging type is supported, you must define
116 PREFERRED_DEBUGGING_TYPE to choose a format in a system-dependent way.
118 This is one long line cause VAXC can't handle a \-newline. */
119 #if 1 < (defined (DBX_DEBUGGING_INFO) + defined (SDB_DEBUGGING_INFO) + defined (DWARF_DEBUGGING_INFO) + defined (DWARF2_DEBUGGING_INFO) + defined (XCOFF_DEBUGGING_INFO))
120 #ifndef PREFERRED_DEBUGGING_TYPE
121 You Lose
! You must define PREFERRED_DEBUGGING_TYPE
!
122 #endif /* no PREFERRED_DEBUGGING_TYPE */
123 #else /* Only one debugging format supported. Define PREFERRED_DEBUGGING_TYPE
124 so the following code needn't care. */
125 #ifdef DBX_DEBUGGING_INFO
126 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
128 #ifdef SDB_DEBUGGING_INFO
129 #define PREFERRED_DEBUGGING_TYPE SDB_DEBUG
131 #ifdef DWARF_DEBUGGING_INFO
132 #define PREFERRED_DEBUGGING_TYPE DWARF_DEBUG
134 #ifdef DWARF2_DEBUGGING_INFO
135 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
137 #ifdef XCOFF_DEBUGGING_INFO
138 #define PREFERRED_DEBUGGING_TYPE XCOFF_DEBUG
140 #endif /* More than one debugger format enabled. */
142 /* If still not defined, must have been because no debugging formats
144 #ifndef PREFERRED_DEBUGGING_TYPE
145 #define PREFERRED_DEBUGGING_TYPE NO_DEBUG
148 #if defined (HAVE_DECL_ENVIRON) && !HAVE_DECL_ENVIRON
149 extern char **environ
;
152 /* Carry information from ASM_DECLARE_OBJECT_NAME
153 to ASM_FINISH_DECLARE_OBJECT. */
155 extern int size_directive_output
;
156 extern tree last_assemble_variable_decl
;
158 static void set_target_switch
PARAMS ((const char *));
159 static const char *decl_name
PARAMS ((tree
, int));
161 static void float_signal
PARAMS ((int)) ATTRIBUTE_NORETURN
;
162 static void pipe_closed
PARAMS ((int)) ATTRIBUTE_NORETURN
;
163 #ifdef ASM_IDENTIFY_LANGUAGE
164 /* This might or might not be used in ASM_IDENTIFY_LANGUAGE. */
165 static void output_lang_identify
PARAMS ((FILE *)) ATTRIBUTE_UNUSED
;
167 static void compile_file
PARAMS ((const char *));
168 static void display_help
PARAMS ((void));
169 static void mark_file_stack
PARAMS ((void *));
171 static void decode_d_option
PARAMS ((const char *));
172 static int decode_f_option
PARAMS ((const char *));
173 static int decode_W_option
PARAMS ((const char *));
174 static int decode_g_option
PARAMS ((const char *));
175 static unsigned int independent_decode_option
PARAMS ((int, char **,
178 static void print_version
PARAMS ((FILE *, const char *));
179 static int print_single_switch
PARAMS ((FILE *, int, int, const char *,
180 const char *, const char *,
181 const char *, const char *));
182 static void print_switch_values
PARAMS ((FILE *, int, int, const char *,
183 const char *, const char *));
185 /* Length of line when printing switch values. */
188 /* Name of program invoked, sans directories. */
190 const char *progname
;
192 /* Copy of arguments to main. */
196 /* Name of current original source file (what was input to cpp).
197 This comes from each #-command in the actual input. */
199 const char *input_filename
;
201 /* Name of top-level original source file (what was input to cpp).
202 This comes from the #-command at the beginning of the actual input.
203 If there isn't any there, then this is the cc1 input file name. */
205 const char *main_input_filename
;
207 /* Current line number in real source file. */
211 /* Nonzero if it is unsafe to create any new pseudo registers. */
214 /* Stack of currently pending input files. */
216 struct file_stack
*input_file_stack
;
218 /* Incremented on each change to input_file_stack. */
219 int input_file_stack_tick
;
221 /* Name to use as base of names for dump output files. */
223 const char *dump_base_name
;
225 /* Bit flags that specify the machine subtype we are compiling for.
226 Bits are tested using macros TARGET_... defined in the tm.h file
227 and set by `-m...' switches. Must be defined in rtlanal.c. */
229 extern int target_flags
;
231 /* Describes a dump file. */
233 struct dump_file_info
235 /* The unique extension to apply, e.g. ".jump". */
236 const char * const extension
;
238 /* The -d<c> character that enables this dump file. */
239 char const debug_switch
;
241 /* True if there is a corresponding graph dump file. */
242 char const graph_dump_p
;
244 /* True if the user selected this dump. */
247 /* True if the files have been initialized (ie truncated). */
251 /* Enumerate the extant dump files. */
287 /* Describes all the dump files. Should be kept in order of the
288 pass and in sync with dump_file_index above.
290 Remaining -d letters:
296 struct dump_file_info dump_file
[DFI_MAX
] =
298 { "rtl", 'r', 0, 0, 0 },
299 { "sibling", 'i', 0, 0, 0 },
300 { "jump", 'j', 0, 0, 0 },
301 { "cse", 's', 0, 0, 0 },
302 { "addressof", 'F', 0, 0, 0 },
303 { "ssa", 'e', 1, 0, 0 },
304 { "ussa", 'e', 1, 0, 0 }, /* Yes, duplicate enable switch. */
305 { "gcse", 'G', 1, 0, 0 },
306 { "loop", 'L', 1, 0, 0 },
307 { "cse2", 't', 1, 0, 0 },
308 { "cfg", 'f', 1, 0, 0 },
309 { "bp", 'b', 1, 0, 0 },
310 { "life", 'f', 1, 0, 0 }, /* Yes, duplicate enable switch. */
311 { "combine", 'c', 1, 0, 0 },
312 { "ce", 'C', 1, 0, 0 },
313 { "regmove", 'N', 1, 0, 0 },
314 { "sched", 'S', 1, 0, 0 },
315 { "lreg", 'l', 1, 0, 0 },
316 { "greg", 'g', 1, 0, 0 },
317 { "flow2", 'w', 1, 0, 0 },
318 { "ce2", 'E', 1, 0, 0 },
319 { "peephole2", 'z', 1, 0, 0 },
320 { "rnreg", 'n', 1, 0, 0 },
321 { "sched2", 'R', 1, 0, 0 },
322 { "bbro", 'B', 1, 0, 0 },
323 { "jump2", 'J', 1, 0, 0 },
324 { "mach", 'M', 1, 0, 0 },
325 { "dbr", 'd', 0, 0, 0 },
326 { "stack", 'k', 1, 0, 0 },
329 static int open_dump_file
PARAMS ((enum dump_file_index
, tree
));
330 static void close_dump_file
PARAMS ((enum dump_file_index
,
331 void (*) (FILE *, rtx
), rtx
));
333 /* Other flags saying which kinds of debugging dump have been requested. */
335 int rtl_dump_and_exit
;
336 int flag_print_asm_name
;
337 static int flag_print_mem
;
338 static int version_flag
;
339 static char * filename
;
340 enum graph_dump_types graph_dump_format
;
342 /* Name for output file of assembly code, specified with -o. */
346 /* Value of the -G xx switch, and whether it was passed or not. */
350 /* Type(s) of debugging information we are producing (if any).
351 See flags.h for the definitions of the different possible
352 types of debugging information. */
353 enum debug_info_type write_symbols
= NO_DEBUG
;
355 /* Level of debugging information we are producing. See flags.h
356 for the definitions of the different possible levels. */
357 enum debug_info_level debug_info_level
= DINFO_LEVEL_NONE
;
359 /* Nonzero means use GNU-only extensions in the generated symbolic
360 debugging information. */
361 /* Currently, this only has an effect when write_symbols is set to
362 DBX_DEBUG, XCOFF_DEBUG, or DWARF_DEBUG. */
363 int use_gnu_debug_info_extensions
= 0;
365 /* Nonzero means do optimizations. -O.
366 Particular numeric values stand for particular amounts of optimization;
367 thus, -O2 stores 2 here. However, the optimizations beyond the basic
368 ones are not controlled directly by this variable. Instead, they are
369 controlled by individual `flag_...' variables that are defaulted
370 based on this variable. */
374 /* Nonzero means optimize for size. -Os.
375 The only valid values are zero and non-zero. When optimize_size is
376 non-zero, optimize defaults to 2, but certain individual code
377 bloating optimizations are disabled. */
379 int optimize_size
= 0;
381 /* Number of error messages and warning messages so far. */
384 int warningcount
= 0;
387 /* The FUNCTION_DECL for the function currently being compiled,
388 or 0 if between functions. */
389 tree current_function_decl
;
391 /* Set to the FUNC_BEGIN label of the current function, or NULL_TREE
393 tree current_function_func_begin_label
;
395 /* Pointer to function to compute the name to use to print a declaration.
396 DECL is the declaration in question.
397 VERBOSITY determines what information will be printed:
398 0: DECL_NAME, demangled as necessary.
399 1: and scope information.
400 2: and any other information that might be interesting, such as function
401 parameter types in C++. */
403 const char *(*decl_printable_name
) PARAMS ((tree
, int));
405 /* Pointer to function to compute rtl for a language-specific tree code. */
407 typedef rtx (*lang_expand_expr_t
)
408 PARAMS ((union tree_node
*, rtx
, enum machine_mode
,
409 enum expand_modifier modifier
));
411 lang_expand_expr_t lang_expand_expr
= 0;
413 tree (*lang_expand_constant
) PARAMS ((tree
)) = 0;
415 /* Pointer to function to finish handling an incomplete decl at the
416 end of compilation. */
418 void (*incomplete_decl_finalize_hook
) PARAMS ((tree
)) = 0;
420 /* Nonzero if generating code to do profiling. */
422 int profile_flag
= 0;
424 /* Nonzero if generating code to do profiling on a line-by-line basis. */
426 int profile_block_flag
;
428 /* Nonzero if generating code to profile program flow graph arcs. */
430 int profile_arc_flag
= 0;
432 /* Nonzero if generating info for gcov to calculate line test coverage. */
434 int flag_test_coverage
= 0;
436 /* Nonzero indicates that branch taken probabilities should be calculated. */
438 int flag_branch_probabilities
= 0;
440 /* Nonzero if basic blocks should be reordered. */
442 int flag_reorder_blocks
= 0;
444 /* Nonzero if registers should be renamed */
446 int flag_rename_registers
= 0;
448 /* Nonzero for -pedantic switch: warn about anything
449 that standard spec forbids. */
453 /* Temporarily suppress certain warnings.
454 This is set while reading code from a system header file. */
456 int in_system_header
= 0;
458 /* Don't print functions as they are compiled and don't print
459 times taken by the various passes. -quiet. */
465 /* Nonzero means `char' should be signed. */
467 int flag_signed_char
;
469 /* Nonzero means give an enum type only as many bytes as it needs. */
471 int flag_short_enums
;
473 /* Nonzero for -fcaller-saves: allocate values in regs that need to
474 be saved across function calls, if that produces overall better code.
475 Optional now, so people can test it. */
477 #ifdef DEFAULT_CALLER_SAVES
478 int flag_caller_saves
= 1;
480 int flag_caller_saves
= 0;
483 /* Nonzero if structures and unions should be returned in memory.
485 This should only be defined if compatibility with another compiler or
486 with an ABI is needed, because it results in slower code. */
488 #ifndef DEFAULT_PCC_STRUCT_RETURN
489 #define DEFAULT_PCC_STRUCT_RETURN 1
492 /* Nonzero for -fpcc-struct-return: return values the same way PCC does. */
494 int flag_pcc_struct_return
= DEFAULT_PCC_STRUCT_RETURN
;
496 /* Nonzero for -fforce-mem: load memory value into a register
497 before arithmetic on it. This makes better cse but slower compilation. */
499 int flag_force_mem
= 0;
501 /* Nonzero for -fforce-addr: load memory address into a register before
502 reference to memory. This makes better cse but slower compilation. */
504 int flag_force_addr
= 0;
506 /* Nonzero for -fdefer-pop: don't pop args after each function call;
507 instead save them up to pop many calls' args with one insns. */
509 int flag_defer_pop
= 0;
511 /* Nonzero for -ffloat-store: don't allocate floats and doubles
512 in extended-precision registers. */
514 int flag_float_store
= 0;
516 /* Nonzero for -fcse-follow-jumps:
517 have cse follow jumps to do a more extensive job. */
519 int flag_cse_follow_jumps
;
521 /* Nonzero for -fcse-skip-blocks:
522 have cse follow a branch around a block. */
523 int flag_cse_skip_blocks
;
525 /* Nonzero for -fexpensive-optimizations:
526 perform miscellaneous relatively-expensive optimizations. */
527 int flag_expensive_optimizations
;
529 /* Nonzero for -fthread-jumps:
530 have jump optimize output of loop. */
532 int flag_thread_jumps
;
534 /* Nonzero enables strength-reduction in loop.c. */
536 int flag_strength_reduce
= 0;
538 /* Nonzero enables loop unrolling in unroll.c. Only loops for which the
539 number of iterations can be calculated at compile-time (UNROLL_COMPLETELY,
540 UNROLL_MODULO) or at run-time (preconditioned to be UNROLL_MODULO) are
543 int flag_unroll_loops
;
545 /* Nonzero enables loop unrolling in unroll.c. All loops are unrolled.
546 This is generally not a win. */
548 int flag_unroll_all_loops
;
550 /* Nonzero forces all invariant computations in loops to be moved
553 int flag_move_all_movables
= 0;
555 /* Nonzero forces all general induction variables in loops to be
558 int flag_reduce_all_givs
= 0;
560 /* Nonzero to perform full register move optimization passes. This is the
563 int flag_regmove
= 0;
565 /* Nonzero for -fwritable-strings:
566 store string constants in data segment and don't uniquize them. */
568 int flag_writable_strings
= 0;
570 /* Nonzero means don't put addresses of constant functions in registers.
571 Used for compiling the Unix kernel, where strange substitutions are
572 done on the assembly output. */
574 int flag_no_function_cse
= 0;
576 /* Nonzero for -fomit-frame-pointer:
577 don't make a frame pointer in simple functions that don't require one. */
579 int flag_omit_frame_pointer
= 0;
581 /* Nonzero means place each function into its own section on those platforms
582 which support arbitrary section names and unlimited numbers of sections. */
584 int flag_function_sections
= 0;
586 /* ... and similar for data. */
588 int flag_data_sections
= 0;
590 /* Nonzero to inhibit use of define_optimization peephole opts. */
592 int flag_no_peephole
= 0;
594 /* Nonzero allows GCC to violate some IEEE or ANSI rules regarding math
595 operations in the interest of optimization. For example it allows
596 GCC to assume arguments to sqrt are nonnegative numbers, allowing
597 faster code for sqrt to be generated. */
599 int flag_fast_math
= 0;
601 /* Nonzero allows GCC to optimize sibling and tail recursive calls. */
603 int flag_optimize_sibling_calls
= 0;
605 /* Nonzero means the front end generally wants `errno' maintained by math
606 operations, like built-in SQRT, unless overridden by flag_fast_math. */
608 int flag_errno_math
= 1;
610 /* 0 means straightforward implementation of complex divide acceptable.
611 1 means wide ranges of inputs must work for complex divide.
612 2 means C9X-like requirements for complex divide (not yet implemented). */
614 int flag_complex_divide_method
= 0;
616 /* Nonzero means all references through pointers are volatile. */
620 /* Nonzero means treat all global and extern variables as volatile. */
622 int flag_volatile_global
;
624 /* Nonzero means treat all static variables as volatile. */
626 int flag_volatile_static
;
628 /* Nonzero means just do syntax checking; don't output anything. */
630 int flag_syntax_only
= 0;
632 /* Nonzero means perform global cse. */
634 static int flag_gcse
;
636 /* Nonzero means to use global dataflow analysis to eliminate
637 useless null pointer tests. */
639 static int flag_delete_null_pointer_checks
;
641 /* Nonzero means to rerun cse after loop optimization. This increases
642 compilation time about 20% and picks up a few more common expressions. */
644 static int flag_rerun_cse_after_loop
;
646 /* Nonzero means to run loop optimizations twice. */
648 int flag_rerun_loop_opt
;
650 /* Nonzero for -finline-functions: ok to inline functions that look like
651 good inline candidates. */
653 int flag_inline_functions
;
655 /* Nonzero for -fkeep-inline-functions: even if we make a function
656 go inline everywhere, keep its definition around for debugging
659 int flag_keep_inline_functions
;
661 /* Nonzero means that functions will not be inlined. */
665 /* Nonzero means that we should emit static const variables
666 regardless of whether or not optimization is turned on. */
668 int flag_keep_static_consts
= 1;
670 /* Nonzero means we should be saving declaration info into a .X file. */
672 int flag_gen_aux_info
= 0;
674 /* Specified name of aux-info file. */
676 static char *aux_info_file_name
;
678 /* Nonzero means make the text shared if supported. */
680 int flag_shared_data
;
682 /* Nonzero means schedule into delayed branch slots if supported. */
684 int flag_delayed_branch
;
686 /* Nonzero if we are compiling pure (sharable) code.
687 Value is 1 if we are doing reasonable (i.e. simple
688 offset into offset table) pic. Value is 2 if we can
689 only perform register offsets. */
693 /* Nonzero means generate extra code for exception handling and enable
694 exception handling. */
698 /* Nonzero means use the new model for exception handling. Replaces
699 -DNEW_EH_MODEL as a compile option. */
701 int flag_new_exceptions
= 1;
703 /* Nonzero means generate frame unwind info table when supported */
705 int flag_unwind_tables
= 0;
707 /* Nonzero means don't place uninitialized global data in common storage
712 /* Nonzero means pretend it is OK to examine bits of target floats,
713 even if that isn't true. The resulting code will have incorrect constants,
714 but the same series of instructions that the native compiler would make. */
716 int flag_pretend_float
;
718 /* Nonzero means change certain warnings into errors.
719 Usually these are warnings about failure to conform to some standard. */
721 int flag_pedantic_errors
= 0;
723 /* flag_schedule_insns means schedule insns within basic blocks (before
725 flag_schedule_insns_after_reload means schedule insns after
728 int flag_schedule_insns
= 0;
729 int flag_schedule_insns_after_reload
= 0;
731 /* The following flags have effect only for scheduling before register
734 flag_schedule_interblock means schedule insns accross basic blocks.
735 flag_schedule_speculative means allow speculative motion of non-load insns.
736 flag_schedule_speculative_load means allow speculative motion of some
738 flag_schedule_speculative_load_dangerous allows speculative motion of more
741 int flag_schedule_interblock
= 1;
742 int flag_schedule_speculative
= 1;
743 int flag_schedule_speculative_load
= 0;
744 int flag_schedule_speculative_load_dangerous
= 0;
746 /* flag_on_branch_count_reg means try to replace add-1,compare,branch tupple
747 by a cheaper branch, on a count register. */
748 int flag_branch_on_count_reg
;
750 /* -finhibit-size-directive inhibits output of .size for ELF.
751 This is used only for compiling crtstuff.c,
752 and it may be extended to other effects
753 needed for crtstuff.c on other systems. */
754 int flag_inhibit_size_directive
= 0;
756 /* -fverbose-asm causes extra commentary information to be produced in
757 the generated assembly code (to make it more readable). This option
758 is generally only of use to those who actually need to read the
759 generated assembly code (perhaps while debugging the compiler itself).
760 -fno-verbose-asm, the default, causes the extra information
761 to be omitted and is useful when comparing two assembler files. */
763 int flag_verbose_asm
= 0;
765 /* -dA causes debug commentary information to be produced in
766 the generated assembly code (to make it more readable). This option
767 is generally only of use to those who actually need to read the
768 generated assembly code (perhaps while debugging the compiler itself).
769 Currently, this switch is only used by dwarfout.c; however, it is intended
770 to be a catchall for printing debug information in the assembler file. */
772 int flag_debug_asm
= 0;
774 /* -fgnu-linker specifies use of the GNU linker for initializations.
775 (Or, more generally, a linker that handles initializations.)
776 -fno-gnu-linker says that collect2 will be used. */
778 int flag_gnu_linker
= 0;
780 int flag_gnu_linker
= 1;
786 /* Tag all structures with __attribute__(packed) */
787 int flag_pack_struct
= 0;
789 /* Emit code to check for stack overflow; also may cause large objects
790 to be allocated dynamically. */
791 int flag_stack_check
;
793 /* When non-NULL, indicates that whenever space is allocated on the
794 stack, the resulting stack pointer must not pass this
795 address---that is, for stacks that grow downward, the stack pointer
796 must always be greater than or equal to this address; for stacks
797 that grow upward, the stack pointer must be less than this address.
798 At present, the rtx may be either a REG or a SYMBOL_REF, although
799 the support provided depends on the backend. */
802 /* -fcheck-memory-usage causes extra code to be generated in order to check
803 memory accesses. This is used by a detector of bad memory accesses such
805 int flag_check_memory_usage
= 0;
807 /* -fprefix-function-name causes function name to be prefixed. This
808 can be used with -fcheck-memory-usage to isolate code compiled with
809 -fcheck-memory-usage. */
810 int flag_prefix_function_name
= 0;
812 /* 0 if pointer arguments may alias each other. True in C.
813 1 if pointer arguments may not alias each other but may alias
815 2 if pointer arguments may not alias each other and may not
816 alias global variables. True in Fortran.
817 This defaults to 0 for C. */
818 int flag_argument_noalias
= 0;
820 /* Nonzero if we should do (language-dependent) alias analysis.
821 Typically, this analysis will assume that expressions of certain
822 types do not alias expressions of certain other types. Only used
823 if alias analysis (in general) is enabled. */
824 int flag_strict_aliasing
= 0;
826 /* Instrument functions with calls at entry and exit, for profiling. */
827 int flag_instrument_function_entry_exit
= 0;
829 /* Nonzero means ignore `#ident' directives. 0 means handle them.
830 On SVR4 targets, it also controls whether or not to emit a
831 string identifying the compiler. */
833 int flag_no_ident
= 0;
835 /* This will perform a peephole pass before sched2. */
836 int flag_peephole2
= 0;
838 /* -fbounded-pointers causes gcc to compile pointers as composite
839 objects occupying three words: the pointer value, the base address
840 of the referent object, and the address immediately beyond the end
841 of the referent object. The base and extent allow us to perform
842 runtime bounds checking. -fbounded-pointers implies -fcheck-bounds. */
843 int flag_bounded_pointers
= 0;
845 /* -fcheck-bounds causes gcc to generate array bounds checks.
846 For C, C++: defaults to value of flag_bounded_pointers.
847 For ObjC: defaults to off.
848 For Java: defaults to on.
849 For Fortran: defaults to off.
850 For CHILL: defaults to off. */
851 int flag_bounds_check
= 0;
853 /* If one, renumber instruction UIDs to reduce the number of
854 unused UIDs if there are a lot of instructions. If greater than
855 one, unconditionally renumber instruction UIDs. */
856 int flag_renumber_insns
= 1;
858 /* Values of the -falign-* flags: how much to align labels in code.
859 0 means `use default', 1 means `don't align'.
860 For each variable, there is an _log variant which is the power
861 of two not less than the variable, for .align output. */
868 int align_labels_log
;
870 int align_functions_log
;
872 /* Table of supported debugging formats. */
876 /* Since PREFERRED_DEBUGGING_TYPE isn't necessarily a
877 constant expression, we use NO_DEBUG in its place. */
878 enum debug_info_type debug_type
;
879 int use_extensions_p
;
880 const char * description
;
884 { "", NO_DEBUG
, DEFAULT_GDB_EXTENSIONS
,
885 "Generate default debug format output" },
886 { "gdb", NO_DEBUG
, 1, "Generate default extended debug format output" },
887 #ifdef DBX_DEBUGGING_INFO
888 { "stabs", DBX_DEBUG
, 0, "Generate STABS format debug output" },
889 { "stabs+", DBX_DEBUG
, 1, "Generate extended STABS format debug output" },
891 #ifdef DWARF_DEBUGGING_INFO
892 { "dwarf", DWARF_DEBUG
, 0, "Generate DWARF-1 format debug output"},
893 { "dwarf+", DWARF_DEBUG
, 1,
894 "Generated extended DWARF-1 format debug output" },
896 #ifdef DWARF2_DEBUGGING_INFO
897 { "dwarf-2", DWARF2_DEBUG
, 0, "Enable DWARF-2 debug output" },
899 #ifdef XCOFF_DEBUGGING_INFO
900 { "xcoff", XCOFF_DEBUG
, 0, "Generate XCOFF format debug output" },
901 { "xcoff+", XCOFF_DEBUG
, 1, "Generate extended XCOFF format debug output" },
903 #ifdef SDB_DEBUGGING_INFO
904 { "coff", SDB_DEBUG
, 0, "Generate COFF format debug output" },
914 const char * description
;
916 lang_independent_options
;
918 /* Add or remove a leading underscore from user symbols. */
919 int flag_leading_underscore
= -1;
921 /* The user symbol prefix after having resolved same. */
922 const char *user_label_prefix
;
924 /* A default for same. */
925 #ifndef USER_LABEL_PREFIX
926 #define USER_LABEL_PREFIX ""
929 /* Table of language-independent -f options.
930 STRING is the option name. VARIABLE is the address of the variable.
931 ON_VALUE is the value to store in VARIABLE
932 if `-fSTRING' is seen as an option.
933 (If `-fno-STRING' is seen as an option, the opposite value is stored.) */
935 lang_independent_options f_options
[] =
937 {"float-store", &flag_float_store
, 1,
938 "Do not store floats in registers" },
939 {"volatile", &flag_volatile
, 1,
940 "Consider all mem refs through pointers as volatile"},
941 {"volatile-global", &flag_volatile_global
, 1,
942 "Consider all mem refs to global data to be volatile" },
943 {"volatile-static", &flag_volatile_static
, 1,
944 "Consider all mem refs to static data to be volatile" },
945 {"defer-pop", &flag_defer_pop
, 1,
946 "Defer popping functions args from stack until later" },
947 {"omit-frame-pointer", &flag_omit_frame_pointer
, 1,
948 "When possible do not generate stack frames"},
949 {"optimize-sibling-calls", &flag_optimize_sibling_calls
, 1,
950 "Optimize sibling and tail recursive calls" },
951 {"cse-follow-jumps", &flag_cse_follow_jumps
, 1,
952 "When running CSE, follow jumps to their targets" },
953 {"cse-skip-blocks", &flag_cse_skip_blocks
, 1,
954 "When running CSE, follow conditional jumps" },
955 {"expensive-optimizations", &flag_expensive_optimizations
, 1,
956 "Perform a number of minor, expensive optimisations" },
957 {"thread-jumps", &flag_thread_jumps
, 1,
958 "Perform jump threading optimisations"},
959 {"strength-reduce", &flag_strength_reduce
, 1,
960 "Perform strength reduction optimisations" },
961 {"unroll-loops", &flag_unroll_loops
, 1,
962 "Perform loop unrolling when iteration count is known" },
963 {"unroll-all-loops", &flag_unroll_all_loops
, 1,
964 "Perform loop unrolling for all loops" },
965 {"move-all-movables", &flag_move_all_movables
, 1,
966 "Force all loop invariant computations out of loops" },
967 {"reduce-all-givs", &flag_reduce_all_givs
, 1,
968 "Strength reduce all loop general induction variables" },
969 {"writable-strings", &flag_writable_strings
, 1,
970 "Store strings in writable data section" },
971 {"peephole", &flag_no_peephole
, 0,
972 "Enable machine specific peephole optimisations" },
973 {"force-mem", &flag_force_mem
, 1,
974 "Copy memory operands into registers before using" },
975 {"force-addr", &flag_force_addr
, 1,
976 "Copy memory address constants into regs before using" },
977 {"function-cse", &flag_no_function_cse
, 0,
978 "Allow function addresses to be held in registers" },
979 {"inline-functions", &flag_inline_functions
, 1,
980 "Integrate simple functions into their callers" },
981 {"keep-inline-functions", &flag_keep_inline_functions
, 1,
982 "Generate code for funcs even if they are fully inlined" },
983 {"inline", &flag_no_inline
, 0,
984 "Pay attention to the 'inline' keyword"},
985 {"keep-static-consts", &flag_keep_static_consts
, 1,
986 "Emit static const variables even if they are not used" },
987 {"syntax-only", &flag_syntax_only
, 1,
988 "Check for syntax errors, then stop" },
989 {"shared-data", &flag_shared_data
, 1,
990 "Mark data as shared rather than private" },
991 {"caller-saves", &flag_caller_saves
, 1,
992 "Enable saving registers around function calls" },
993 {"pcc-struct-return", &flag_pcc_struct_return
, 1,
994 "Return 'short' aggregates in memory, not registers" },
995 {"reg-struct-return", &flag_pcc_struct_return
, 0,
996 "Return 'short' aggregates in registers" },
997 {"delayed-branch", &flag_delayed_branch
, 1,
998 "Attempt to fill delay slots of branch instructions" },
999 {"gcse", &flag_gcse
, 1,
1000 "Perform the global common subexpression elimination" },
1001 {"rerun-cse-after-loop", &flag_rerun_cse_after_loop
, 1,
1002 "Run CSE pass after loop optimisations"},
1003 {"rerun-loop-opt", &flag_rerun_loop_opt
, 1,
1004 "Run the loop optimiser twice"},
1005 {"delete-null-pointer-checks", &flag_delete_null_pointer_checks
, 1,
1006 "Delete useless null pointer checks" },
1007 {"pretend-float", &flag_pretend_float
, 1,
1008 "Pretend that host and target use the same FP format"},
1009 {"schedule-insns", &flag_schedule_insns
, 1,
1010 "Reschedule instructions to avoid pipeline stalls"},
1011 {"schedule-insns2", &flag_schedule_insns_after_reload
, 1,
1012 "Run two passes of the instruction scheduler"},
1013 {"sched-interblock",&flag_schedule_interblock
, 1,
1014 "Enable scheduling across basic blocks" },
1015 {"sched-spec",&flag_schedule_speculative
, 1,
1016 "Allow speculative motion of non-loads" },
1017 {"sched-spec-load",&flag_schedule_speculative_load
, 1,
1018 "Allow speculative motion of some loads" },
1019 {"sched-spec-load-dangerous",&flag_schedule_speculative_load_dangerous
, 1,
1020 "Allow speculative motion of more loads" },
1021 {"branch-count-reg",&flag_branch_on_count_reg
, 1,
1022 "Replace add,compare,branch with branch on count reg"},
1023 {"pic", &flag_pic
, 1,
1024 "Generate position independent code, if possible"},
1025 {"PIC", &flag_pic
, 2, ""},
1026 {"exceptions", &flag_exceptions
, 1,
1027 "Enable exception handling" },
1028 {"new-exceptions", &flag_new_exceptions
, 1,
1029 "Use the new model for exception handling" },
1030 {"unwind-tables", &flag_unwind_tables
, 1,
1031 "Just generate unwind tables for exception handling" },
1032 {"sjlj-exceptions", &exceptions_via_longjmp
, 1,
1033 "Use setjmp/longjmp to handle exceptions" },
1034 {"asynchronous-exceptions", &asynchronous_exceptions
, 1,
1035 "Support asynchronous exceptions" },
1036 {"profile-arcs", &profile_arc_flag
, 1,
1037 "Insert arc based program profiling code" },
1038 {"test-coverage", &flag_test_coverage
, 1,
1039 "Create data files needed by gcov" },
1040 {"branch-probabilities", &flag_branch_probabilities
, 1,
1041 "Use profiling information for branch probabilities" },
1042 {"reorder-blocks", &flag_reorder_blocks
, 1,
1043 "Reorder basic blocks to improve code placement" },
1044 {"rename-registers", &flag_rename_registers
, 1,
1045 "Do the register renaming optimization pass"},
1046 {"fast-math", &flag_fast_math
, 1,
1047 "Improve FP speed by violating ANSI & IEEE rules" },
1048 {"common", &flag_no_common
, 0,
1049 "Do not put unitialised globals in the common section" },
1050 {"inhibit-size-directive", &flag_inhibit_size_directive
, 1,
1051 "Do not generate .size directives" },
1052 {"function-sections", &flag_function_sections
, 1,
1053 "place each function into its own section" },
1054 {"data-sections", &flag_data_sections
, 1,
1055 "place data items into their own section" },
1056 {"verbose-asm", &flag_verbose_asm
, 1,
1057 "Add extra commentry to assembler output"},
1058 {"gnu-linker", &flag_gnu_linker
, 1,
1059 "Output GNU ld formatted global initialisers"},
1060 {"regmove", &flag_regmove
, 1,
1061 "Enables a register move optimisation"},
1062 {"optimize-register-move", &flag_regmove
, 1,
1063 "Do the full regmove optimization pass"},
1064 {"pack-struct", &flag_pack_struct
, 1,
1065 "Pack structure members together without holes" },
1066 {"stack-check", &flag_stack_check
, 1,
1067 "Insert stack checking code into the program" },
1068 {"argument-alias", &flag_argument_noalias
, 0,
1069 "Specify that arguments may alias each other & globals"},
1070 {"argument-noalias", &flag_argument_noalias
, 1,
1071 "Assume arguments may alias globals but not each other"},
1072 {"argument-noalias-global", &flag_argument_noalias
, 2,
1073 "Assume arguments do not alias each other or globals" },
1074 {"strict-aliasing", &flag_strict_aliasing
, 1,
1075 "Assume strict aliasing rules apply" },
1076 {"align-loops", &align_loops
, 0,
1077 "Align the start of loops" },
1078 {"align-jumps", &align_jumps
, 0,
1079 "Align labels which are only reached by jumping" },
1080 {"align-labels", &align_labels
, 0,
1081 "Align all labels" },
1082 {"align-functions", &align_functions
, 0,
1083 "Align the start of functions" },
1084 {"check-memory-usage", &flag_check_memory_usage
, 1,
1085 "Generate code to check every memory access" },
1086 {"prefix-function-name", &flag_prefix_function_name
, 1,
1087 "Add a prefix to all function names" },
1088 {"dump-unnumbered", &flag_dump_unnumbered
, 1,
1089 "Suppress output of instruction numbers and line number notes in debugging dumps"},
1090 {"instrument-functions", &flag_instrument_function_entry_exit
, 1,
1091 "Instrument function entry/exit with profiling calls"},
1092 {"ssa", &flag_ssa
, 1,
1093 "Enable SSA optimizations" },
1094 {"leading-underscore", &flag_leading_underscore
, 1,
1095 "External symbols have a leading underscore" },
1096 {"ident", &flag_no_ident
, 0,
1097 "Process #ident directives"},
1098 { "peephole2", &flag_peephole2
, 1,
1099 "Enables an rtl peephole pass run before sched2" },
1100 {"math-errno", &flag_errno_math
, 1,
1101 "Set errno after built-in math functions"},
1102 {"bounded-pointers", &flag_bounded_pointers
, 1,
1103 "Compile pointers as triples: value, base & end" },
1104 {"bounds-check", &flag_bounds_check
, 1,
1105 "Generate code to check bounds before dereferencing pointers and arrays" }
1108 #define NUM_ELEM(a) (sizeof (a) / sizeof ((a)[0]))
1110 /* Table of language-specific options. */
1112 static struct lang_opt
1114 const char * option
;
1115 const char * description
;
1117 documented_lang_options
[] =
1119 /* In order not to overload the --help output, the convention
1120 used here is to only describe those options which are not
1121 enabled by default. */
1123 { "-ansi", "Compile just for ANSI C" },
1124 { "-fallow-single-precision",
1125 "Do not promote floats to double if using -traditional" },
1126 { "-std= ", "Determine language standard"},
1128 { "-fsigned-bitfields", "" },
1129 { "-funsigned-bitfields","Make bitfields by unsigned by default" },
1130 { "-fno-signed-bitfields", "" },
1131 { "-fno-unsigned-bitfields","" },
1132 { "-fsigned-char", "Make 'char' be signed by default"},
1133 { "-funsigned-char", "Make 'char' be unsigned by default"},
1134 { "-fno-signed-char", "" },
1135 { "-fno-unsigned-char", "" },
1137 { "-ftraditional", "" },
1138 { "-traditional", "Attempt to support traditional K&R style C"},
1139 { "-fnotraditional", "" },
1140 { "-fno-traditional", "" },
1143 { "-fno-asm", "Do not recognise the 'asm' keyword" },
1144 { "-fbuiltin", "" },
1145 { "-fno-builtin", "Do not recognise any built in functions" },
1146 { "-fhosted", "Assume normal C execution environment" },
1147 { "-fno-hosted", "" },
1149 "Assume that standard libraries & main might not exist" },
1150 { "-fno-freestanding", "" },
1151 { "-fcond-mismatch", "Allow different types as args of ? operator"},
1152 { "-fno-cond-mismatch", "" },
1153 { "-fdollars-in-identifiers", "Allow the use of $ inside identifiers" },
1154 { "-fno-dollars-in-identifiers", "" },
1155 { "-fpreprocessed", "" },
1156 { "-fno-preprocessed", "" },
1157 { "-fshort-double", "Use the same size for double as for float" },
1158 { "-fno-short-double", "" },
1159 { "-fshort-enums", "Use the smallest fitting integer to hold enums"},
1160 { "-fno-short-enums", "" },
1161 { "-fshort-wchar", "Override the underlying type for wchar_t to `unsigned short'" },
1162 { "-fno-short-wchar", "" },
1164 { "-Wall", "Enable most warning messages" },
1165 { "-Wbad-function-cast",
1166 "Warn about casting functions to incompatible types" },
1167 { "-Wno-bad-function-cast", "" },
1168 { "-Wmissing-noreturn",
1169 "Warn about functions which might be candidates for attribute noreturn" },
1170 { "-Wno-missing-noreturn", "" },
1171 { "-Wcast-qual", "Warn about casts which discard qualifiers"},
1172 { "-Wno-cast-qual", "" },
1173 { "-Wchar-subscripts", "Warn about subscripts whose type is 'char'"},
1174 { "-Wno-char-subscripts", "" },
1175 { "-Wcomment", "Warn if nested comments are detected" },
1176 { "-Wno-comment", "" },
1177 { "-Wcomments", "Warn if nested comments are detected" },
1178 { "-Wno-comments", "" },
1179 { "-Wconversion", "Warn about possibly confusing type conversions" },
1180 { "-Wno-conversion", "" },
1181 { "-Wformat", "Warn about printf format anomalies" },
1182 { "-Wno-format", "" },
1183 { "-Wimplicit-function-declaration",
1184 "Warn about implicit function declarations" },
1185 { "-Wno-implicit-function-declaration", "" },
1186 { "-Werror-implicit-function-declaration", "" },
1187 { "-Wimplicit-int", "Warn when a declaration does not specify a type" },
1188 { "-Wno-implicit-int", "" },
1189 { "-Wimplicit", "" },
1190 { "-Wno-implicit", "" },
1191 { "-Wimport", "Warn about the use of the #import directive" },
1192 { "-Wno-import", "" },
1193 { "-Wlong-long","" },
1194 { "-Wno-long-long", "Do not warn about using 'long long' when -pedantic" },
1195 { "-Wmain", "Warn about suspicious declarations of main" },
1196 { "-Wno-main", "" },
1197 { "-Wmissing-braces",
1198 "Warn about possibly missing braces around initialisers" },
1199 { "-Wno-missing-braces", "" },
1200 { "-Wmissing-declarations",
1201 "Warn about global funcs without previous declarations"},
1202 { "-Wno-missing-declarations", "" },
1203 { "-Wmissing-prototypes", "Warn about global funcs without prototypes" },
1204 { "-Wno-missing-prototypes", "" },
1205 { "-Wmultichar", "Warn about use of multicharacter literals"},
1206 { "-Wno-multichar", "" },
1207 { "-Wnested-externs", "Warn about externs not at file scope level" },
1208 { "-Wno-nested-externs", "" },
1209 { "-Wparentheses", "Warn about possible missing parentheses" },
1210 { "-Wno-parentheses", "" },
1211 { "-Wpointer-arith", "Warn about function pointer arithmetic" },
1212 { "-Wno-pointer-arith", "" },
1213 { "-Wredundant-decls",
1214 "Warn about multiple declarations of the same object" },
1215 { "-Wno-redundant-decls", "" },
1216 { "-Wsign-compare", "Warn about signed/unsigned comparisons" },
1217 { "-Wno-sign-compare", "" },
1218 { "-Wfloat-equal", "Warn about testing equality of floating point numbers" },
1219 { "-Wno-float-equal", "" },
1220 { "-Wunknown-pragmas", "Warn about unrecognized pragmas" },
1221 { "-Wno-unknown-pragmas", "" },
1222 { "-Wstrict-prototypes", "Warn about non-prototyped function decls" },
1223 { "-Wno-strict-prototypes", "" },
1224 { "-Wtraditional", "Warn about constructs whose meaning change in ANSI C"},
1225 { "-Wno-traditional", "" },
1226 { "-Wtrigraphs", "Warn when trigraphs are encountered" },
1227 { "-Wno-trigraphs", "" },
1229 { "-Wno-undef", "" },
1230 { "-Wwrite-strings", "Mark strings as 'const char *'"},
1231 { "-Wno-write-strings", "" },
1233 #define DEFINE_LANG_NAME(NAME) { NULL, NAME },
1235 /* These are for Objective C. */
1236 DEFINE_LANG_NAME ("Objective C")
1238 { "-lang-objc", "" },
1239 { "-gen-decls", "Dump decls to a .decl file" },
1240 { "-fgnu-runtime", "Generate code for GNU runtime environment" },
1241 { "-fno-gnu-runtime", "" },
1242 { "-fnext-runtime", "Generate code for NeXT runtime environment" },
1243 { "-fno-next-runtime", "" },
1244 { "-Wselector", "Warn if a selector has multiple methods" },
1245 { "-Wno-selector", "" },
1246 { "-Wprotocol", "" },
1247 { "-Wno-protocol", "Do not warn if inherited methods are unimplemented"},
1248 { "-print-objc-runtime-info",
1249 "Generate C header of platform specific features" },
1251 #include "options.h"
1255 /* Here is a table, controlled by the tm.h file, listing each -m switch
1256 and which bits in `target_switches' it should set or clear.
1257 If VALUE is positive, it is bits to set.
1258 If VALUE is negative, -VALUE is bits to clear.
1259 (The sign bit is not used so there is no confusion.) */
1265 const char * description
;
1267 target_switches
[] = TARGET_SWITCHES
;
1269 /* This table is similar, but allows the switch to have a value. */
1271 #ifdef TARGET_OPTIONS
1274 const char * prefix
;
1275 const char ** variable
;
1276 const char * description
;
1278 target_options
[] = TARGET_OPTIONS
;
1281 /* Options controlling warnings */
1283 /* Don't print warning messages. -w. */
1285 int inhibit_warnings
= 0;
1287 /* Print various extra warnings. -W. */
1289 int extra_warnings
= 0;
1291 /* Treat warnings as errors. -Werror. */
1293 int warnings_are_errors
= 0;
1295 /* Nonzero to warn about unused variables, functions et.al. */
1297 int warn_unused_function
;
1298 int warn_unused_label
;
1299 int warn_unused_parameter
;
1300 int warn_unused_variable
;
1301 int warn_unused_value
;
1304 set_Wunused (setting
)
1307 warn_unused_function
= setting
;
1308 warn_unused_label
= setting
;
1309 /* Unused function parameter warnings are reported when either ``-W
1310 -Wunused'' or ``-Wunused-parameter'' is specified. Differentiate
1311 -Wunused by setting WARN_UNUSED_PARAMETER to -1 */
1313 warn_unused_parameter
= 0;
1314 else if (!warn_unused_parameter
)
1315 warn_unused_parameter
= -1;
1316 warn_unused_variable
= setting
;
1317 warn_unused_value
= setting
;
1320 /* Nonzero to warn about code which is never reached. */
1322 int warn_notreached
;
1324 /* Nonzero to warn about variables used before they are initialized. */
1326 int warn_uninitialized
;
1328 /* Nonzero means warn about all declarations which shadow others. */
1332 /* Warn if a switch on an enum fails to have a case for every enum value. */
1336 /* Nonzero means warn about function definitions that default the return type
1337 or that use a null return and have a return-type other than void. */
1339 int warn_return_type
;
1341 /* Nonzero means warn about pointer casts that increase the required
1342 alignment of the target type (and might therefore lead to a crash
1343 due to a misaligned access). */
1345 int warn_cast_align
;
1347 /* Nonzero means warn about any identifiers that match in the first N
1348 characters. The value N is in `id_clash_len'. */
1353 /* Nonzero means warn about any objects definitions whose size is larger
1354 than N bytes. Also want about function definitions whose returned
1355 values are larger than N bytes. The value N is in `larger_than_size'. */
1357 int warn_larger_than
;
1358 HOST_WIDE_INT larger_than_size
;
1360 /* Nonzero means warn if inline function is too large. */
1364 /* Warn if a function returns an aggregate,
1365 since there are often incompatible calling conventions for doing this. */
1367 int warn_aggregate_return
;
1369 /* Warn if packed attribute on struct is unnecessary and inefficient. */
1373 /* Warn when gcc pads a structure to an alignment boundary. */
1377 /* Likewise for -W. */
1379 lang_independent_options W_options
[] =
1381 {"unused-function", &warn_unused_function
, 1, "Warn when a function is unused" },
1382 {"unused-label", &warn_unused_label
, 1, "Warn when a label is unused" },
1383 {"unused-parameter", &warn_unused_parameter
, 1, "Warn when a function parameter is unused" },
1384 {"unused-variable", &warn_unused_variable
, 1, "Warn when a variable is unused" },
1385 {"unused-value", &warn_unused_value
, 1, "Warn when an expression value is unused" },
1386 {"error", &warnings_are_errors
, 1, ""},
1387 {"shadow", &warn_shadow
, 1, "Warn when one local variable shadows another" },
1388 {"switch", &warn_switch
, 1,
1389 "Warn about enumerated switches missing a specific case" },
1390 {"aggregate-return", &warn_aggregate_return
, 1,
1391 "Warn about returning structures, unions or arrays" },
1392 {"cast-align", &warn_cast_align
, 1,
1393 "Warn about pointer casts which increase alignment" },
1394 {"unreachable-code", &warn_notreached
, 1,
1395 "Warn about code that will never be executed" },
1396 {"uninitialized", &warn_uninitialized
, 1,
1397 "Warn about unitialized automatic variables"},
1398 {"inline", &warn_inline
, 1,
1399 "Warn when an inlined function cannot be inlined"},
1400 {"packed", &warn_packed
, 1,
1401 "Warn when the packed attribute has no effect on struct layout"},
1402 {"padded", &warn_padded
, 1,
1403 "Warn when padding is required to align struct members"}
1406 /* Output files for assembler code (real compiler output)
1407 and debugging dumps. */
1410 FILE *aux_info_file
;
1411 FILE *rtl_dump_file
= NULL
;
1413 /* Decode the string P as an integral parameter.
1414 If the string is indeed an integer return its numeric value else
1415 issue an Invalid Option error for the option PNAME and return DEFVAL.
1416 If PNAME is zero just return DEFVAL, do not call error. */
1419 read_integral_parameter (p
, pname
, defval
)
1424 const char *endp
= p
;
1428 if (*endp
>= '0' && *endp
<= '9')
1437 error ("Invalid option `%s'", pname
);
1445 /* This is the default decl_printable_name function. */
1448 decl_name (decl
, verbosity
)
1450 int verbosity ATTRIBUTE_UNUSED
;
1452 return IDENTIFIER_POINTER (DECL_NAME (decl
));
1455 /* Mark P for GC. Also mark main_input_filename and input_filename. */
1461 struct file_stack
*stack
= *(struct file_stack
**)p
;
1463 /* We're only called for input_file_stack, so we can mark the current
1464 input_filename here as well. */
1465 ggc_mark_string (main_input_filename
);
1466 ggc_mark_string (input_filename
);
1470 ggc_mark_string (stack
->name
);
1471 stack
= stack
->next
;
1476 /* This calls abort and is used to avoid problems when abort if a macro.
1477 It is used when we need to pass the address of abort. */
1485 /* When `malloc.c' is compiled with `rcheck' defined,
1486 it calls this function to report clobberage. */
1490 const char * s ATTRIBUTE_UNUSED
;
1495 /* Return the logarithm of X, base 2, considering X unsigned,
1496 if X is a power of 2. Otherwise, returns -1.
1498 This should be used via the `exact_log2' macro. */
1502 register unsigned HOST_WIDE_INT x
;
1504 register int log
= 0;
1505 /* Test for 0 or a power of 2. */
1506 if (x
== 0 || x
!= (x
& -x
))
1508 while ((x
>>= 1) != 0)
1513 /* Given X, an unsigned number, return the largest int Y such that 2**Y <= X.
1514 If X is 0, return -1.
1516 This should be used via the floor_log2 macro. */
1520 register unsigned HOST_WIDE_INT x
;
1522 register int log
= -1;
1529 static int float_handler_set
;
1531 jmp_buf float_handler
;
1533 /* Signals actually come here. */
1536 float_signal (signo
)
1537 /* If this is missing, some compilers complain. */
1538 int signo ATTRIBUTE_UNUSED
;
1540 if (float_handled
== 0)
1542 #if defined (USG) || defined (hpux)
1543 signal (SIGFPE
, float_signal
); /* re-enable the signal catcher */
1546 signal (SIGFPE
, float_signal
);
1547 longjmp (float_handler
, 1);
1550 /* Specify where to longjmp to when a floating arithmetic error happens.
1551 If HANDLER is 0, it means don't handle the errors any more. */
1554 set_float_handler (handler
)
1557 float_handled
= (handler
!= 0);
1559 bcopy ((char *) handler
, (char *) float_handler
, sizeof (float_handler
));
1561 if (float_handled
&& ! float_handler_set
)
1563 signal (SIGFPE
, float_signal
);
1564 float_handler_set
= 1;
1568 /* This is a wrapper function for code which might elicit an
1569 arithmetic exception. That code should be passed in as a function
1570 pointer FN, and one argument DATA. DATA is usually a struct which
1571 contains the real input and output for function FN. This function
1572 returns 0 (failure) if longjmp was called (i.e. an exception
1573 occured.) It returns 1 (success) otherwise. */
1576 do_float_handler (fn
, data
)
1577 void (*fn
) PARAMS ((PTR
));
1584 /* We got here via longjmp() caused by an exception in function fn() */
1585 set_float_handler (NULL
);
1589 set_float_handler (buf
);
1591 set_float_handler (NULL
);
1595 /* Specify, in HANDLER, where to longjmp to when a floating arithmetic
1596 error happens, pushing the previous specification into OLD_HANDLER.
1597 Return an indication of whether there was a previous handler in effect. */
1600 push_float_handler (handler
, old_handler
)
1601 jmp_buf handler
, old_handler
;
1603 int was_handled
= float_handled
;
1607 memcpy ((char *) old_handler
, (char *) float_handler
,
1608 sizeof (float_handler
));
1610 memcpy ((char *) float_handler
, (char *) handler
, sizeof (float_handler
));
1614 /* Restore the previous specification of whether and where to longjmp to
1615 when a floating arithmetic error happens. */
1618 pop_float_handler (handled
, handler
)
1622 float_handled
= handled
;
1624 bcopy ((char *) handler
, (char *) float_handler
, sizeof (float_handler
));
1627 /* Handler for SIGPIPE. */
1631 /* If this is missing, some compilers complain. */
1632 int signo ATTRIBUTE_UNUSED
;
1634 fatal ("output pipe has been closed");
1637 /* Strip off a legitimate source ending from the input string NAME of
1638 length LEN. Rather than having to know the names used by all of
1639 our front ends, we strip off an ending of a period followed by
1640 up to five characters. (Java uses ".class".) */
1643 strip_off_ending (name
, len
)
1648 for (i
= 2; i
< 6 && len
> i
; i
++)
1650 if (name
[len
- i
] == '.')
1652 name
[len
- i
] = '\0';
1658 /* Output a quoted string. */
1661 output_quoted_string (asm_file
, string
)
1665 #ifdef OUTPUT_QUOTED_STRING
1666 OUTPUT_QUOTED_STRING (asm_file
, string
);
1670 putc ('\"', asm_file
);
1671 while ((c
= *string
++) != 0)
1673 if (c
== '\"' || c
== '\\')
1674 putc ('\\', asm_file
);
1677 putc ('\"', asm_file
);
1681 /* Output a file name in the form wanted by System V. */
1684 output_file_directive (asm_file
, input_name
)
1686 const char *input_name
;
1688 int len
= strlen (input_name
);
1689 const char *na
= input_name
+ len
;
1691 /* NA gets INPUT_NAME sans directory names. */
1692 while (na
> input_name
)
1694 if (IS_DIR_SEPARATOR (na
[-1]))
1699 #ifdef ASM_OUTPUT_MAIN_SOURCE_FILENAME
1700 ASM_OUTPUT_MAIN_SOURCE_FILENAME (asm_file
, na
);
1702 #ifdef ASM_OUTPUT_SOURCE_FILENAME
1703 ASM_OUTPUT_SOURCE_FILENAME (asm_file
, na
);
1705 fprintf (asm_file
, "\t.file\t");
1706 output_quoted_string (asm_file
, na
);
1707 fputc ('\n', asm_file
);
1712 #ifdef ASM_IDENTIFY_LANGUAGE
1713 /* Routine to build language identifier for object file. */
1715 output_lang_identify (asm_out_file
)
1718 int len
= strlen (lang_identify ()) + sizeof ("__gnu_compiled_") + 1;
1719 char *s
= (char *) alloca (len
);
1720 sprintf (s
, "__gnu_compiled_%s", lang_identify ());
1721 ASM_OUTPUT_LABEL (asm_out_file
, s
);
1725 /* Routine to open a dump file. Return true if the dump file is enabled. */
1728 open_dump_file (index
, decl
)
1729 enum dump_file_index index
;
1733 const char *open_arg
;
1736 if (! dump_file
[index
].enabled
)
1739 timevar_push (TV_DUMP
);
1740 if (rtl_dump_file
!= NULL
)
1741 fclose (rtl_dump_file
);
1743 sprintf (seq
, ".%02d.", index
);
1745 if (! dump_file
[index
].initialized
)
1747 /* If we've not initialized the files, do so now. */
1748 if (graph_dump_format
!= no_graph
1749 && dump_file
[index
].graph_dump_p
)
1751 dump_name
= concat (seq
, dump_file
[index
].extension
, NULL
);
1752 clean_graph_dump_file (dump_base_name
, dump_name
);
1755 dump_file
[index
].initialized
= 1;
1761 dump_name
= concat (dump_base_name
, seq
,
1762 dump_file
[index
].extension
, NULL
);
1764 rtl_dump_file
= fopen (dump_name
, open_arg
);
1765 if (rtl_dump_file
== NULL
)
1766 pfatal_with_name (dump_name
);
1771 fprintf (rtl_dump_file
, "\n;; Function %s\n\n",
1772 decl_printable_name (decl
, 2));
1774 timevar_pop (TV_DUMP
);
1778 /* Routine to close a dump file. */
1781 close_dump_file (index
, func
, insns
)
1782 enum dump_file_index index
;
1783 void (*func
) PARAMS ((FILE *, rtx
));
1786 if (! rtl_dump_file
)
1789 timevar_push (TV_DUMP
);
1791 && graph_dump_format
!= no_graph
1792 && dump_file
[index
].graph_dump_p
)
1797 sprintf (seq
, ".%02d.", index
);
1798 suffix
= concat (seq
, dump_file
[index
].extension
, NULL
);
1799 print_rtl_graph_with_bb (dump_base_name
, suffix
, insns
);
1804 func (rtl_dump_file
, insns
);
1806 fflush (rtl_dump_file
);
1807 fclose (rtl_dump_file
);
1809 rtl_dump_file
= NULL
;
1810 timevar_pop (TV_DUMP
);
1813 /* Do any final processing required for the declarations in VEC, of
1814 which there are LEN. We write out inline functions and variables
1815 that have been deferred until this point, but which are required.
1816 Returns non-zero if anything was put out. */
1818 wrapup_global_declarations (vec
, len
)
1825 int output_something
= 0;
1827 for (i
= 0; i
< len
; i
++)
1831 /* We're not deferring this any longer. */
1832 DECL_DEFER_OUTPUT (decl
) = 0;
1834 if (TREE_CODE (decl
) == VAR_DECL
&& DECL_SIZE (decl
) == 0
1835 && incomplete_decl_finalize_hook
!= 0)
1836 (*incomplete_decl_finalize_hook
) (decl
);
1839 /* Now emit any global variables or functions that we have been
1840 putting off. We need to loop in case one of the things emitted
1841 here references another one which comes earlier in the list. */
1845 for (i
= 0; i
< len
; i
++)
1849 if (TREE_ASM_WRITTEN (decl
) || DECL_EXTERNAL (decl
))
1852 /* Don't write out static consts, unless we still need them.
1854 We also keep static consts if not optimizing (for debugging),
1855 unless the user specified -fno-keep-static-consts.
1856 ??? They might be better written into the debug information.
1857 This is possible when using DWARF.
1859 A language processor that wants static constants to be always
1860 written out (even if it is not used) is responsible for
1861 calling rest_of_decl_compilation itself. E.g. the C front-end
1862 calls rest_of_decl_compilation from finish_decl.
1863 One motivation for this is that is conventional in some
1864 environments to write things like:
1865 static const char rcsid[] = "... version string ...";
1866 intending to force the string to be in the executable.
1868 A language processor that would prefer to have unneeded
1869 static constants "optimized away" would just defer writing
1870 them out until here. E.g. C++ does this, because static
1871 constants are often defined in header files.
1873 ??? A tempting alternative (for both C and C++) would be
1874 to force a constant to be written if and only if it is
1875 defined in a main file, as opposed to an include file. */
1877 if (TREE_CODE (decl
) == VAR_DECL
&& TREE_STATIC (decl
)
1878 && (! TREE_READONLY (decl
)
1879 || TREE_PUBLIC (decl
)
1880 || (!optimize
&& flag_keep_static_consts
)
1881 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl
))))
1884 rest_of_decl_compilation (decl
, NULL_PTR
, 1, 1);
1887 if (TREE_CODE (decl
) == FUNCTION_DECL
1888 && DECL_INITIAL (decl
) != 0
1889 && DECL_SAVED_INSNS (decl
) != 0
1890 && (flag_keep_inline_functions
1891 || (TREE_PUBLIC (decl
) && !DECL_COMDAT (decl
))
1892 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl
))))
1895 temporary_allocation ();
1896 output_inline_function (decl
);
1897 permanent_allocation (1);
1902 output_something
= 1;
1906 return output_something
;
1909 /* Issue appropriate warnings for the global declarations in VEC (of
1910 which there are LEN). Output debugging information for them. */
1912 check_global_declarations (vec
, len
)
1919 for (i
= 0; i
< len
; i
++)
1923 if (TREE_CODE (decl
) == VAR_DECL
&& TREE_STATIC (decl
)
1924 && ! TREE_ASM_WRITTEN (decl
))
1925 /* Cancel the RTL for this decl so that, if debugging info
1926 output for global variables is still to come,
1927 this one will be omitted. */
1928 DECL_RTL (decl
) = NULL
;
1930 /* Warn about any function
1931 declared static but not defined.
1932 We don't warn about variables,
1933 because many programs have static variables
1934 that exist only to get some text into the object file. */
1935 if (TREE_CODE (decl
) == FUNCTION_DECL
1936 && (warn_unused_function
1937 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl
)))
1938 && DECL_INITIAL (decl
) == 0
1939 && DECL_EXTERNAL (decl
)
1940 && ! DECL_ARTIFICIAL (decl
)
1941 && ! TREE_PUBLIC (decl
))
1943 if (TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl
)))
1944 pedwarn_with_decl (decl
,
1945 "`%s' used but never defined");
1947 warning_with_decl (decl
,
1948 "`%s' declared `static' but never defined");
1949 /* This symbol is effectively an "extern" declaration now. */
1950 TREE_PUBLIC (decl
) = 1;
1951 assemble_external (decl
);
1954 /* Warn about static fns or vars defined but not used,
1955 but not about inline functions or static consts
1956 since defining those in header files is normal practice. */
1957 if (((warn_unused_function
1958 && TREE_CODE (decl
) == FUNCTION_DECL
&& ! DECL_INLINE (decl
))
1959 || (warn_unused_variable
1960 && TREE_CODE (decl
) == VAR_DECL
&& ! TREE_READONLY (decl
)))
1961 && ! DECL_IN_SYSTEM_HEADER (decl
)
1962 && ! DECL_EXTERNAL (decl
)
1963 && ! TREE_PUBLIC (decl
)
1964 && ! TREE_USED (decl
)
1965 && (TREE_CODE (decl
) == FUNCTION_DECL
|| ! DECL_REGISTER (decl
))
1966 /* The TREE_USED bit for file-scope decls
1967 is kept in the identifier, to handle multiple
1968 external decls in different scopes. */
1969 && ! TREE_USED (DECL_NAME (decl
)))
1970 warning_with_decl (decl
, "`%s' defined but not used");
1972 timevar_push (TV_SYMOUT
);
1973 #ifdef SDB_DEBUGGING_INFO
1974 /* The COFF linker can move initialized global vars to the end.
1975 And that can screw up the symbol ordering.
1976 By putting the symbols in that order to begin with,
1977 we avoid a problem. mcsun!unido!fauern!tumuc!pes@uunet.uu.net. */
1978 if (write_symbols
== SDB_DEBUG
&& TREE_CODE (decl
) == VAR_DECL
1979 && TREE_PUBLIC (decl
) && DECL_INITIAL (decl
)
1980 && ! DECL_EXTERNAL (decl
)
1981 && DECL_RTL (decl
) != 0)
1982 sdbout_symbol (decl
, 0);
1984 /* Output COFF information for non-global
1985 file-scope initialized variables. */
1986 if (write_symbols
== SDB_DEBUG
1987 && TREE_CODE (decl
) == VAR_DECL
1988 && DECL_INITIAL (decl
)
1989 && ! DECL_EXTERNAL (decl
)
1990 && DECL_RTL (decl
) != 0
1991 && GET_CODE (DECL_RTL (decl
)) == MEM
)
1992 sdbout_toplevel_data (decl
);
1993 #endif /* SDB_DEBUGGING_INFO */
1994 #ifdef DWARF_DEBUGGING_INFO
1995 /* Output DWARF information for file-scope tentative data object
1996 declarations, file-scope (extern) function declarations (which
1997 had no corresponding body) and file-scope tagged type declarations
1998 and definitions which have not yet been forced out. */
2000 if (write_symbols
== DWARF_DEBUG
2001 && (TREE_CODE (decl
) != FUNCTION_DECL
|| !DECL_INITIAL (decl
)))
2002 dwarfout_file_scope_decl (decl
, 1);
2004 #ifdef DWARF2_DEBUGGING_INFO
2005 /* Output DWARF2 information for file-scope tentative data object
2006 declarations, file-scope (extern) function declarations (which
2007 had no corresponding body) and file-scope tagged type declarations
2008 and definitions which have not yet been forced out. */
2010 if (write_symbols
== DWARF2_DEBUG
2011 && (TREE_CODE (decl
) != FUNCTION_DECL
|| !DECL_INITIAL (decl
)))
2012 dwarf2out_decl (decl
);
2014 timevar_pop (TV_SYMOUT
);
2018 /* Save the current INPUT_FILENAME and LINENO on the top entry in the
2019 INPUT_FILE_STACK. Push a new entry for FILE and LINE, and set the
2020 INPUT_FILENAME and LINENO accordingly. */
2023 push_srcloc (file
, line
)
2027 struct file_stack
*fs
;
2029 if (input_file_stack
)
2031 input_file_stack
->name
= input_filename
;
2032 input_file_stack
->line
= lineno
;
2035 fs
= (struct file_stack
*) xmalloc (sizeof (struct file_stack
));
2036 fs
->name
= input_filename
= file
;
2037 fs
->line
= lineno
= line
;
2038 fs
->indent_level
= 0;
2039 fs
->next
= input_file_stack
;
2040 input_file_stack
= fs
;
2041 input_file_stack_tick
++;
2044 /* Pop the top entry off the stack of presently open source files.
2045 Restore the INPUT_FILENAME and LINENO from the new topmost entry on
2051 struct file_stack
*fs
;
2053 fs
= input_file_stack
;
2054 input_file_stack
= fs
->next
;
2056 input_file_stack_tick
++;
2057 /* The initial souce file is never popped. */
2058 if (!input_file_stack
)
2060 input_filename
= input_file_stack
->name
;
2061 lineno
= input_file_stack
->line
;
2064 /* Compile an entire file of output from cpp, named NAME.
2065 Write a file of assembly output and various debugging dumps. */
2073 int name_specified
= name
!= 0;
2075 if (dump_base_name
== 0)
2076 dump_base_name
= name
? name
: "gccdump";
2078 /* Start timing total execution time. */
2081 timevar_start (TV_TOTAL
);
2083 /* Initialize data in various passes. */
2087 name
= init_parse (name
);
2088 init_emit_once (debug_info_level
== DINFO_LEVEL_NORMAL
2089 || debug_info_level
== DINFO_LEVEL_VERBOSE
2090 || flag_test_coverage
2091 || warn_notreached
);
2094 init_decl_processing ();
2100 init_function_once ();
2101 init_stor_layout_once ();
2102 init_varasm_once ();
2104 /* The following initialization functions need to generate rtl, so
2105 provide a dummy function context for them. */
2106 init_dummy_function_start ();
2109 if (flag_caller_saves
)
2110 init_caller_save ();
2111 expand_dummy_function_end ();
2113 /* If auxiliary info generation is desired, open the output file.
2114 This goes in the same directory as the source file--unlike
2115 all the other output files. */
2116 if (flag_gen_aux_info
)
2118 aux_info_file
= fopen (aux_info_file_name
, "w");
2119 if (aux_info_file
== 0)
2120 pfatal_with_name (aux_info_file_name
);
2123 /* Open assembler code output file. */
2125 if (flag_syntax_only
)
2126 asm_out_file
= NULL
;
2129 if (! name_specified
&& asm_file_name
== 0)
2130 asm_out_file
= stdout
;
2133 if (asm_file_name
== 0)
2135 int len
= strlen (dump_base_name
);
2136 char *dumpname
= (char *) xmalloc (len
+ 6);
2137 memcpy (dumpname
, dump_base_name
, len
+ 1);
2138 strip_off_ending (dumpname
, len
);
2139 strcat (dumpname
, ".s");
2140 asm_file_name
= dumpname
;
2142 if (!strcmp (asm_file_name
, "-"))
2143 asm_out_file
= stdout
;
2145 asm_out_file
= fopen (asm_file_name
, "w");
2146 if (asm_out_file
== 0)
2147 pfatal_with_name (asm_file_name
);
2150 #ifdef IO_BUFFER_SIZE
2151 setvbuf (asm_out_file
, (char *) xmalloc (IO_BUFFER_SIZE
),
2152 _IOFBF
, IO_BUFFER_SIZE
);
2156 if (ggc_p
&& name
!= 0)
2157 name
= ggc_alloc_string (name
, strlen (name
));
2159 input_filename
= name
;
2161 /* Put an entry on the input file stack for the main input file. */
2162 push_srcloc (input_filename
, 0);
2164 /* Perform language-specific initialization.
2165 This may set main_input_filename. */
2168 /* If the input doesn't start with a #line, use the input name
2169 as the official input file name. */
2170 if (main_input_filename
== 0)
2171 main_input_filename
= name
;
2173 if (flag_syntax_only
)
2175 write_symbols
= NO_DEBUG
;
2177 profile_block_flag
= 0;
2181 ASM_FILE_START (asm_out_file
);
2183 #ifdef ASM_COMMENT_START
2184 if (flag_verbose_asm
)
2186 /* Print the list of options in effect. */
2187 print_version (asm_out_file
, ASM_COMMENT_START
);
2188 print_switch_values (asm_out_file
, 0, MAX_LINE
,
2189 ASM_COMMENT_START
, " ", "\n");
2190 /* Add a blank line here so it appears in assembler output but not
2192 fprintf (asm_out_file
, "\n");
2196 /* Output something to inform GDB that this compilation was by GCC. */
2197 #ifndef ASM_IDENTIFY_GCC
2198 fprintf (asm_out_file
, "gcc2_compiled.:\n");
2200 ASM_IDENTIFY_GCC (asm_out_file
);
2203 /* Output something to identify which front-end produced this file. */
2204 #ifdef ASM_IDENTIFY_LANGUAGE
2205 ASM_IDENTIFY_LANGUAGE (asm_out_file
);
2207 } /* ! flag_syntax_only */
2209 #ifndef ASM_OUTPUT_SECTION_NAME
2210 if (flag_function_sections
)
2212 warning ("-ffunction-sections not supported for this target.");
2213 flag_function_sections
= 0;
2215 if (flag_data_sections
)
2217 warning ("-fdata-sections not supported for this target.");
2218 flag_data_sections
= 0;
2222 if (flag_function_sections
2223 && (profile_flag
|| profile_block_flag
))
2225 warning ("-ffunction-sections disabled; it makes profiling impossible.");
2226 flag_function_sections
= 0;
2229 #ifndef OBJECT_FORMAT_ELF
2230 if (flag_function_sections
&& write_symbols
!= NO_DEBUG
)
2231 warning ("-ffunction-sections may affect debugging on some targets.");
2234 /* ??? Note: There used to be a conditional here
2235 to call assemble_zeros without fail if DBX_DEBUGGING_INFO is defined.
2236 This was to guarantee separation between gcc_compiled. and
2237 the first function, for the sake of dbx on Suns.
2238 However, having the extra zero here confused the Emacs
2239 code for unexec, and might confuse other programs too.
2240 Therefore, I took out that change.
2241 In future versions we should find another way to solve
2242 that dbx problem. -- rms, 23 May 93. */
2244 /* Don't let the first function fall at the same address
2245 as gcc_compiled., if profiling. */
2246 if (profile_flag
|| profile_block_flag
)
2248 /* It's best if we can write a nop here since some
2249 assemblers don't tolerate zeros in the text section. */
2250 output_asm_insn (get_insn_template (CODE_FOR_nop
, NULL
), NULL_PTR
);
2253 /* If dbx symbol table desired, initialize writing it
2254 and output the predefined types. */
2255 timevar_push (TV_SYMOUT
);
2256 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
2257 if (write_symbols
== DBX_DEBUG
|| write_symbols
== XCOFF_DEBUG
)
2258 dbxout_init (asm_out_file
, main_input_filename
, getdecls ());
2260 #ifdef SDB_DEBUGGING_INFO
2261 if (write_symbols
== SDB_DEBUG
)
2262 sdbout_init (asm_out_file
, main_input_filename
, getdecls ());
2264 #ifdef DWARF_DEBUGGING_INFO
2265 if (write_symbols
== DWARF_DEBUG
)
2266 dwarfout_init (asm_out_file
, main_input_filename
);
2268 #ifdef DWARF2_UNWIND_INFO
2269 if (dwarf2out_do_frame ())
2270 dwarf2out_frame_init ();
2272 #ifdef DWARF2_DEBUGGING_INFO
2273 if (write_symbols
== DWARF2_DEBUG
)
2274 dwarf2out_init (asm_out_file
, main_input_filename
);
2276 timevar_pop (TV_SYMOUT
);
2278 /* Initialize yet another pass. */
2280 init_final (main_input_filename
);
2281 init_branch_prob (dump_base_name
);
2283 timevar_push (TV_PARSE
);
2285 /* Call the parser, which parses the entire file
2286 (calling rest_of_compilation for each function). */
2288 if (yyparse () != 0)
2290 if (errorcount
== 0)
2291 fnotice (stderr
, "Errors detected in input file (your bison.simple is out of date)\n");
2293 /* In case there were missing closebraces,
2294 get us back to the global binding level. */
2295 while (! global_bindings_p ())
2299 /* Compilation is now finished except for writing
2300 what's left of the symbol table output. */
2302 timevar_pop (TV_PARSE
);
2304 if (flag_syntax_only
)
2307 globals
= getdecls ();
2309 /* Really define vars that have had only a tentative definition.
2310 Really output inline functions that must actually be callable
2311 and have not been output so far. */
2314 int len
= list_length (globals
);
2315 tree
*vec
= (tree
*) xmalloc (sizeof (tree
) * len
);
2319 /* Process the decls in reverse order--earliest first.
2320 Put them into VEC from back to front, then take out from front. */
2322 for (i
= 0, decl
= globals
; i
< len
; i
++, decl
= TREE_CHAIN (decl
))
2323 vec
[len
- i
- 1] = decl
;
2325 wrapup_global_declarations (vec
, len
);
2327 /* This must occur after the loop to output deferred functions. Else
2328 the profiler initializer would not be emitted if all the functions
2329 in this compilation unit were deferred.
2331 output_func_start_profiler can not cause any additional functions or
2332 data to need to be output, so it need not be in the deferred function
2334 output_func_start_profiler ();
2336 /* Now that all possible functions have been output, we can dump
2337 the exception table. */
2339 #ifndef IA64_UNWIND_INFO
2340 output_exception_table ();
2342 free_exception_table ();
2344 check_global_declarations (vec
, len
);
2350 /* Write out any pending weak symbol declarations. */
2354 /* Do dbx symbols */
2355 timevar_push (TV_SYMOUT
);
2356 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
2357 if (write_symbols
== DBX_DEBUG
|| write_symbols
== XCOFF_DEBUG
)
2358 dbxout_finish (asm_out_file
, main_input_filename
);
2361 #ifdef DWARF_DEBUGGING_INFO
2362 if (write_symbols
== DWARF_DEBUG
)
2366 #ifdef DWARF2_UNWIND_INFO
2367 if (dwarf2out_do_frame ())
2368 dwarf2out_frame_finish ();
2371 #ifdef DWARF2_DEBUGGING_INFO
2372 if (write_symbols
== DWARF2_DEBUG
)
2373 dwarf2out_finish ();
2375 timevar_pop (TV_SYMOUT
);
2377 /* Output some stuff at end of file if nec. */
2379 end_final (dump_base_name
);
2381 if (profile_arc_flag
|| flag_test_coverage
|| flag_branch_probabilities
)
2383 timevar_push (TV_DUMP
);
2384 open_dump_file (DFI_bp
, NULL
);
2388 close_dump_file (DFI_bp
, NULL
, NULL_RTX
);
2389 timevar_pop (TV_DUMP
);
2393 ASM_FILE_END (asm_out_file
);
2396 /* Language-specific end of compilation actions. */
2400 /* Close the dump files. */
2402 if (flag_gen_aux_info
)
2404 fclose (aux_info_file
);
2406 unlink (aux_info_file_name
);
2409 if (optimize
> 0 && open_dump_file (DFI_combine
, NULL
))
2411 timevar_push (TV_DUMP
);
2412 dump_combine_total_stats (rtl_dump_file
);
2413 close_dump_file (DFI_combine
, NULL
, NULL_RTX
);
2414 timevar_pop (TV_DUMP
);
2417 /* Close non-debugging input and output files. Take special care to note
2418 whether fclose returns an error, since the pages might still be on the
2419 buffer chain while the file is open. */
2423 if (! flag_syntax_only
2424 && (ferror (asm_out_file
) != 0 || fclose (asm_out_file
) != 0))
2425 fatal_io_error (asm_file_name
);
2427 /* Do whatever is necessary to finish printing the graphs. */
2428 if (graph_dump_format
!= no_graph
)
2432 for (i
= 0; i
< DFI_MAX
; ++i
)
2433 if (dump_file
[i
].initialized
&& dump_file
[i
].graph_dump_p
)
2438 sprintf (seq
, ".%02d.", i
);
2439 suffix
= concat (seq
, dump_file
[i
].extension
, NULL
);
2440 finish_graph_dump_file (dump_base_name
, suffix
);
2445 /* Free up memory for the benefit of leak detectors. */
2448 /* Stop timing total execution time. */
2449 timevar_stop (TV_TOTAL
);
2451 /* Print the times. */
2454 timevar_print (stderr
);
2457 /* This is called from various places for FUNCTION_DECL, VAR_DECL,
2458 and TYPE_DECL nodes.
2460 This does nothing for local (non-static) variables, unless the
2461 variable is a register variable with an ASMSPEC. In that case, or
2462 if the variable is not an automatice, it sets up the RTL and
2463 outputs any assembler code (label definition, storage allocation
2464 and initialization).
2466 DECL is the declaration. If ASMSPEC is nonzero, it specifies
2467 the assembler symbol name to be used. TOP_LEVEL is nonzero
2468 if this declaration is not within a function. */
2471 rest_of_decl_compilation (decl
, asmspec
, top_level
, at_end
)
2473 const char *asmspec
;
2477 /* Declarations of variables, and of functions defined elsewhere. */
2479 /* The most obvious approach, to put an #ifndef around where
2480 this macro is used, doesn't work since it's inside a macro call. */
2481 #ifndef ASM_FINISH_DECLARE_OBJECT
2482 #define ASM_FINISH_DECLARE_OBJECT(FILE, DECL, TOP, END)
2485 /* Forward declarations for nested functions are not "external",
2486 but we need to treat them as if they were. */
2487 if (TREE_STATIC (decl
) || DECL_EXTERNAL (decl
)
2488 || TREE_CODE (decl
) == FUNCTION_DECL
)
2490 timevar_push (TV_VARCONST
);
2491 make_decl_rtl (decl
, asmspec
, top_level
);
2492 /* Initialized extern variable exists to be replaced
2493 with its value, or represents something that will be
2494 output in another file. */
2495 if (! (TREE_CODE (decl
) == VAR_DECL
2496 && DECL_EXTERNAL (decl
) && TREE_READONLY (decl
)
2497 && DECL_INITIAL (decl
) != 0
2498 && DECL_INITIAL (decl
) != error_mark_node
))
2499 /* Don't output anything
2500 when a tentative file-scope definition is seen.
2501 But at end of compilation, do output code for them. */
2502 if (! (! at_end
&& top_level
2503 && (DECL_INITIAL (decl
) == 0
2504 || DECL_INITIAL (decl
) == error_mark_node
)))
2505 assemble_variable (decl
, top_level
, at_end
, 0);
2506 if (decl
== last_assemble_variable_decl
)
2508 ASM_FINISH_DECLARE_OBJECT (asm_out_file
, decl
,
2511 timevar_pop (TV_VARCONST
);
2513 else if (DECL_REGISTER (decl
) && asmspec
!= 0)
2515 if (decode_reg_name (asmspec
) >= 0)
2517 DECL_RTL (decl
) = 0;
2518 make_decl_rtl (decl
, asmspec
, top_level
);
2521 error ("invalid register name `%s' for register variable", asmspec
);
2523 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
2524 else if ((write_symbols
== DBX_DEBUG
|| write_symbols
== XCOFF_DEBUG
)
2525 && TREE_CODE (decl
) == TYPE_DECL
)
2527 timevar_push (TV_SYMOUT
);
2528 dbxout_symbol (decl
, 0);
2529 timevar_pop (TV_SYMOUT
);
2532 #ifdef SDB_DEBUGGING_INFO
2533 else if (write_symbols
== SDB_DEBUG
&& top_level
2534 && TREE_CODE (decl
) == TYPE_DECL
)
2536 timevar_push (TV_SYMOUT
);
2537 sdbout_symbol (decl
, 0);
2538 timevar_pop (TV_SYMOUT
);
2543 /* Called after finishing a record, union or enumeral type. */
2546 rest_of_type_compilation (type
, toplev
)
2547 #if defined(DBX_DEBUGGING_INFO) || defined(XCOFF_DEBUGGING_INFO) || defined (SDB_DEBUGGING_INFO)
2551 tree type ATTRIBUTE_UNUSED
;
2552 int toplev ATTRIBUTE_UNUSED
;
2555 timevar_push (TV_SYMOUT
);
2556 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
2557 if (write_symbols
== DBX_DEBUG
|| write_symbols
== XCOFF_DEBUG
)
2558 dbxout_symbol (TYPE_STUB_DECL (type
), !toplev
);
2560 #ifdef SDB_DEBUGGING_INFO
2561 if (write_symbols
== SDB_DEBUG
)
2562 sdbout_symbol (TYPE_STUB_DECL (type
), !toplev
);
2564 timevar_pop (TV_SYMOUT
);
2567 /* DECL is an inline function, whose body is present, but which is not
2568 being output at this point. (We're putting that off until we need
2569 to do it.) If there are any actions that need to take place,
2570 including the emission of debugging information for the function,
2571 this is where they should go. This function may be called by
2572 language-dependent code for front-ends that do not even generate
2573 RTL for functions that don't need to be put out. */
2576 note_deferral_of_defined_inline_function (decl
)
2577 tree decl ATTRIBUTE_UNUSED
;
2579 #ifdef DWARF_DEBUGGING_INFO
2580 /* Generate the DWARF info for the "abstract" instance of a function
2581 which we may later generate inlined and/or out-of-line instances
2583 if (write_symbols
== DWARF_DEBUG
&& DECL_INLINE (decl
))
2585 /* The front-end may not have set CURRENT_FUNCTION_DECL, but the
2586 DWARF code expects it to be set in this case. Intuitively,
2587 DECL is the function we just finished defining, so setting
2588 CURRENT_FUNCTION_DECL is sensible. */
2589 tree saved_cfd
= current_function_decl
;
2590 current_function_decl
= decl
;
2592 /* Let the DWARF code do its work. */
2593 set_decl_abstract_flags (decl
, 1);
2594 dwarfout_file_scope_decl (decl
, 0);
2595 set_decl_abstract_flags (decl
, 0);
2597 /* Reset CURRENT_FUNCTION_DECL. */
2598 current_function_decl
= saved_cfd
;
2603 /* This is called from finish_function (within yyparse)
2604 after each top-level definition is parsed.
2605 It is supposed to compile that function or variable
2606 and output the assembler code for it.
2607 After we return, the tree storage is freed. */
2610 rest_of_compilation (decl
)
2616 int rebuild_label_notes_after_reload
;
2617 int register_life_up_to_date
;
2619 timevar_push (TV_REST_OF_COMPILATION
);
2621 /* When processing delayed functions, prepare_function_start() won't
2622 have been run to re-initialize it. */
2623 cse_not_expected
= ! optimize
;
2625 /* First, make sure that NOTE_BLOCK is set correctly for each
2626 NOTE_INSN_BLOCK_BEG/NOTE_INSN_BLOCK_END note. */
2627 if (!cfun
->x_whole_function_mode_p
)
2630 /* Then remove any notes we don't need. That will make iterating
2631 over the instruction sequence faster, and allow the garbage
2632 collector to reclaim the memory used by the notes. */
2633 remove_unnecessary_notes ();
2635 /* In function-at-a-time mode, we do not attempt to keep the BLOCK
2636 tree in sensible shape. So, we just recalculate it here. */
2637 if (cfun
->x_whole_function_mode_p
)
2640 /* If we are reconsidering an inline function
2641 at the end of compilation, skip the stuff for making it inline. */
2643 if (DECL_SAVED_INSNS (decl
) == 0)
2649 /* If this is nested inside an inlined external function, pretend
2650 it was only declared. Since we cannot inline such functions,
2651 generating code for this one is not only not necessary but will
2652 confuse some debugging output writers. */
2653 for (parent
= DECL_CONTEXT (current_function_decl
);
2654 parent
!= NULL_TREE
;
2655 parent
= get_containing_scope (parent
))
2656 if (TREE_CODE (parent
) == FUNCTION_DECL
2657 && DECL_INLINE (parent
) && DECL_EXTERNAL (parent
))
2659 DECL_INITIAL (decl
) = 0;
2660 goto exit_rest_of_compilation
;
2663 /* If requested, consider whether to make this function inline. */
2664 if (DECL_INLINE (decl
) || flag_inline_functions
)
2666 timevar_push (TV_INTEGRATION
);
2667 lose
= function_cannot_inline_p (decl
);
2668 timevar_pop (TV_INTEGRATION
);
2669 if (lose
|| ! optimize
)
2671 if (warn_inline
&& DECL_INLINE (decl
))
2672 warning_with_decl (decl
, lose
);
2673 DECL_ABSTRACT_ORIGIN (decl
) = 0;
2674 /* Don't really compile an extern inline function.
2675 If we can't make it inline, pretend
2676 it was only declared. */
2677 if (DECL_EXTERNAL (decl
))
2679 DECL_INITIAL (decl
) = 0;
2680 goto exit_rest_of_compilation
;
2684 /* ??? Note that this has the effect of making it look
2685 like "inline" was specified for a function if we choose
2686 to inline it. This isn't quite right, but it's
2687 probably not worth the trouble to fix. */
2688 inlinable
= DECL_INLINE (decl
) = 1;
2691 insns
= get_insns ();
2693 /* Dump the rtl code if we are dumping rtl. */
2695 if (open_dump_file (DFI_rtl
, decl
))
2697 if (DECL_SAVED_INSNS (decl
))
2698 fprintf (rtl_dump_file
, ";; (integrable)\n\n");
2699 close_dump_file (DFI_rtl
, print_rtl
, insns
);
2702 /* If function is inline, and we don't yet know whether to
2703 compile it by itself, defer decision till end of compilation.
2704 finish_compilation will call rest_of_compilation again
2705 for those functions that need to be output. Also defer those
2706 functions that we are supposed to defer. */
2709 || (DECL_INLINE (decl
)
2710 && ((! TREE_PUBLIC (decl
) && ! TREE_ADDRESSABLE (decl
)
2711 && ! flag_keep_inline_functions
)
2712 || DECL_EXTERNAL (decl
))))
2713 DECL_DEFER_OUTPUT (decl
) = 1;
2715 if (DECL_INLINE (decl
))
2716 /* DWARF wants seperate debugging info for abstract and
2717 concrete instances of all inline functions, including those
2718 declared inline but not inlined, and those inlined even
2719 though they weren't declared inline. Conveniently, that's
2720 what DECL_INLINE means at this point. */
2721 note_deferral_of_defined_inline_function (decl
);
2723 if (DECL_DEFER_OUTPUT (decl
))
2725 /* If -Wreturn-type, we have to do a bit of compilation.
2726 However, if we just fall through we will call
2727 save_for_inline_copying() which results in excessive
2728 memory use. Instead, we just want to call
2729 jump_optimize() to figure out whether or not we can fall
2730 off the end of the function; we do the minimum amount of
2731 work necessary to make that safe. And, we set optimize
2732 to zero to keep jump_optimize from working too hard. */
2733 if (warn_return_type
)
2735 int saved_optimize
= optimize
;
2737 find_exception_handler_labels ();
2738 jump_optimize (insns
, !JUMP_CROSS_JUMP
, !JUMP_NOOP_MOVES
,
2739 !JUMP_AFTER_REGSCAN
);
2740 optimize
= saved_optimize
;
2743 current_function_nothrow
= nothrow_function_p ();
2744 if (current_function_nothrow
)
2745 /* Now we know that this can't throw; set the flag for the benefit
2746 of other functions later in this translation unit. */
2747 TREE_NOTHROW (current_function_decl
) = 1;
2749 timevar_push (TV_INTEGRATION
);
2750 save_for_inline_nocopy (decl
);
2751 timevar_pop (TV_INTEGRATION
);
2752 DECL_SAVED_INSNS (decl
)->inlinable
= inlinable
;
2753 goto exit_rest_of_compilation
;
2756 /* If specified extern inline but we aren't inlining it, we are
2757 done. This goes for anything that gets here with DECL_EXTERNAL
2758 set, not just things with DECL_INLINE. */
2759 if (DECL_EXTERNAL (decl
))
2760 goto exit_rest_of_compilation
;
2763 init_EXPR_INSN_LIST_cache ();
2768 /* Initialize some variables used by the optimizers. */
2769 init_function_for_compilation ();
2771 if (! DECL_DEFER_OUTPUT (decl
))
2772 TREE_ASM_WRITTEN (decl
) = 1;
2774 /* Now that integrate will no longer see our rtl, we need not distinguish
2775 between the return value of this function and the return value of called
2777 rtx_equal_function_value_matters
= 0;
2779 /* Don't return yet if -Wreturn-type; we need to do jump_optimize. */
2780 if ((rtl_dump_and_exit
|| flag_syntax_only
) && !warn_return_type
)
2781 goto exit_rest_of_compilation
;
2783 /* Emit code to get eh context, if needed. */
2786 /* We may have potential sibling or tail recursion sites. Select one
2787 (of possibly multiple) methods of performing the call. */
2788 if (flag_optimize_sibling_calls
)
2790 timevar_push (TV_JUMP
);
2791 open_dump_file (DFI_sibling
, decl
);
2793 optimize_sibling_and_tail_recursive_calls ();
2795 close_dump_file (DFI_sibling
, print_rtl
, get_insns ());
2796 timevar_pop (TV_JUMP
);
2800 /* If we are doing position-independent code generation, now
2801 is the time to output special prologues and epilogues.
2802 We do not want to do this earlier, because it just clutters
2803 up inline functions with meaningless insns. */
2808 /* From now on, allocate rtl in current_obstack, not in saveable_obstack.
2809 Note that that may have been done above, in save_for_inline_copying.
2810 The call to resume_temporary_allocation near the end of this function
2811 goes back to the usual state of affairs. This must be done after
2812 we've built up any unwinders for exception handling, and done
2813 the FINALIZE_PIC work, if necessary. */
2815 rtl_in_current_obstack ();
2817 insns
= get_insns ();
2819 /* Copy any shared structure that should not be shared. */
2820 unshare_all_rtl (current_function_decl
, insns
);
2822 #ifdef SETJMP_VIA_SAVE_AREA
2823 /* This must be performed before virutal register instantiation. */
2824 if (current_function_calls_alloca
)
2825 optimize_save_area_alloca (insns
);
2828 /* Instantiate all virtual registers. */
2829 instantiate_virtual_regs (current_function_decl
, insns
);
2831 /* Find all the EH handlers. */
2832 find_exception_handler_labels ();
2834 open_dump_file (DFI_jump
, decl
);
2836 /* Always do one jump optimization pass to ensure that JUMP_LABEL fields
2837 are initialized and to compute whether control can drop off the end
2840 timevar_push (TV_JUMP
);
2841 /* Turn NOTE_INSN_EXPECTED_VALUE into REG_BR_PROB. Do this
2842 before jump optimization switches branch directions. */
2843 expected_value_to_br_prob ();
2845 reg_scan (insns
, max_reg_num (), 0);
2846 jump_optimize (insns
, !JUMP_CROSS_JUMP
, !JUMP_NOOP_MOVES
,
2847 JUMP_AFTER_REGSCAN
);
2849 timevar_pop (TV_JUMP
);
2851 /* Now is when we stop if -fsyntax-only and -Wreturn-type. */
2852 if (rtl_dump_and_exit
|| flag_syntax_only
|| DECL_DEFER_OUTPUT (decl
))
2854 close_dump_file (DFI_jump
, print_rtl
, insns
);
2855 goto exit_rest_of_compilation
;
2858 timevar_push (TV_JUMP
);
2862 find_basic_blocks (insns
, max_reg_num (), rtl_dump_file
);
2863 cleanup_cfg (insns
);
2865 /* ??? Run if-conversion before delete_null_pointer_checks,
2866 since the later does not preserve the CFG. This should
2867 be changed -- no since converting if's that are going to
2869 timevar_push (TV_IFCVT
);
2871 timevar_pop (TV_IFCVT
);
2873 /* Try to identify useless null pointer tests and delete them. */
2874 if (flag_delete_null_pointer_checks
)
2875 delete_null_pointer_checks (insns
);
2878 /* Jump optimization, and the removal of NULL pointer checks, may
2879 have reduced the number of instructions substantially. CSE, and
2880 future passes, allocate arrays whose dimensions involve the
2881 maximum instruction UID, so if we can reduce the maximum UID
2882 we'll save big on memory. */
2883 renumber_insns (rtl_dump_file
);
2884 timevar_pop (TV_JUMP
);
2886 close_dump_file (DFI_jump
, print_rtl
, insns
);
2891 /* Perform common subexpression elimination.
2892 Nonzero value from `cse_main' means that jumps were simplified
2893 and some code may now be unreachable, so do
2894 jump optimization again. */
2898 open_dump_file (DFI_cse
, decl
);
2899 timevar_push (TV_CSE
);
2901 reg_scan (insns
, max_reg_num (), 1);
2903 if (flag_thread_jumps
)
2905 timevar_push (TV_JUMP
);
2906 thread_jumps (insns
, max_reg_num (), 1);
2907 timevar_pop (TV_JUMP
);
2910 tem
= cse_main (insns
, max_reg_num (), 0, rtl_dump_file
);
2912 /* If we are not running the second CSE pass, then we are no longer
2913 expecting CSE to be run. */
2914 cse_not_expected
= !flag_rerun_cse_after_loop
;
2916 if (tem
|| optimize
> 1)
2918 timevar_push (TV_JUMP
);
2919 jump_optimize (insns
, !JUMP_CROSS_JUMP
, !JUMP_NOOP_MOVES
,
2920 !JUMP_AFTER_REGSCAN
);
2921 timevar_pop (TV_JUMP
);
2924 /* Run this after jump optmizations remove all the unreachable code
2925 so that unreachable code will not keep values live. */
2926 delete_trivially_dead_insns (insns
, max_reg_num ());
2928 /* Try to identify useless null pointer tests and delete them. */
2929 if (flag_delete_null_pointer_checks
)
2931 timevar_push (TV_JUMP
);
2932 find_basic_blocks (insns
, max_reg_num (), rtl_dump_file
);
2934 cleanup_cfg (insns
);
2936 delete_null_pointer_checks (insns
);
2937 timevar_pop (TV_JUMP
);
2940 /* The second pass of jump optimization is likely to have
2941 removed a bunch more instructions. */
2942 renumber_insns (rtl_dump_file
);
2944 timevar_pop (TV_CSE
);
2945 close_dump_file (DFI_cse
, print_rtl
, insns
);
2948 open_dump_file (DFI_addressof
, decl
);
2950 purge_addressof (insns
);
2951 reg_scan (insns
, max_reg_num (), 1);
2953 close_dump_file (DFI_addressof
, print_rtl
, insns
);
2958 if (optimize
> 0 && flag_ssa
)
2960 /* Convert to SSA form. */
2962 timevar_push (TV_TO_SSA
);
2963 open_dump_file (DFI_ssa
, decl
);
2965 find_basic_blocks (insns
, max_reg_num(), rtl_dump_file
);
2966 cleanup_cfg (insns
);
2969 close_dump_file (DFI_ssa
, print_rtl_with_bb
, insns
);
2970 timevar_pop (TV_TO_SSA
);
2972 /* Currently, there's nothing to do in SSA form. */
2974 /* Convert from SSA form. */
2976 timevar_push (TV_FROM_SSA
);
2977 open_dump_file (DFI_ussa
, decl
);
2979 convert_from_ssa ();
2980 /* New registers have been created. Rescan their usage. */
2981 reg_scan (insns
, max_reg_num (), 1);
2982 /* Life analysis used in SSA adds log_links but these
2983 shouldn't be there until the flow stage, so clear
2985 clear_log_links (insns
);
2987 close_dump_file (DFI_ussa
, print_rtl_with_bb
, insns
);
2988 timevar_pop (TV_FROM_SSA
);
2994 /* Perform global cse. */
2996 if (optimize
> 0 && flag_gcse
)
2998 timevar_push (TV_GCSE
);
2999 open_dump_file (DFI_gcse
, decl
);
3001 find_basic_blocks (insns
, max_reg_num(), rtl_dump_file
);
3002 cleanup_cfg (insns
);
3003 tem
= gcse_main (insns
, rtl_dump_file
);
3005 /* If gcse altered any jumps, rerun jump optimizations to clean
3009 timevar_push (TV_JUMP
);
3010 jump_optimize (insns
, !JUMP_CROSS_JUMP
, !JUMP_NOOP_MOVES
,
3011 !JUMP_AFTER_REGSCAN
);
3012 timevar_pop (TV_JUMP
);
3015 close_dump_file (DFI_gcse
, print_rtl
, insns
);
3016 timevar_pop (TV_GCSE
);
3022 /* Move constant computations out of loops. */
3026 timevar_push (TV_LOOP
);
3027 open_dump_file (DFI_loop
, decl
);
3029 if (flag_rerun_loop_opt
)
3031 /* We only want to perform unrolling once. */
3033 loop_optimize (insns
, rtl_dump_file
, 0);
3035 /* The first call to loop_optimize makes some instructions
3036 trivially dead. We delete those instructions now in the
3037 hope that doing so will make the heuristics in loop work
3038 better and possibly speed up compilation. */
3039 delete_trivially_dead_insns (insns
, max_reg_num ());
3041 /* The regscan pass is currently necessary as the alias
3042 analysis code depends on this information. */
3043 reg_scan (insns
, max_reg_num (), 1);
3045 loop_optimize (insns
, rtl_dump_file
, (flag_unroll_loops
? LOOP_UNROLL
: 0) | LOOP_BCT
);
3047 close_dump_file (DFI_loop
, print_rtl
, insns
);
3048 timevar_pop (TV_LOOP
);
3056 timevar_push (TV_CSE2
);
3057 open_dump_file (DFI_cse2
, decl
);
3059 if (flag_rerun_cse_after_loop
)
3061 /* Running another jump optimization pass before the second
3062 cse pass sometimes simplifies the RTL enough to allow
3063 the second CSE pass to do a better job. Jump_optimize can change
3064 max_reg_num so we must rerun reg_scan afterwards.
3065 ??? Rework to not call reg_scan so often. */
3066 timevar_push (TV_JUMP
);
3068 reg_scan (insns
, max_reg_num (), 0);
3069 jump_optimize (insns
, !JUMP_CROSS_JUMP
,
3070 !JUMP_NOOP_MOVES
, JUMP_AFTER_REGSCAN
);
3072 timevar_push (TV_IFCVT
);
3074 find_basic_blocks (insns
, max_reg_num (), rtl_dump_file
);
3075 cleanup_cfg (insns
);
3078 timevar_pop(TV_IFCVT
);
3080 timevar_pop (TV_JUMP
);
3082 reg_scan (insns
, max_reg_num (), 0);
3083 tem
= cse_main (insns
, max_reg_num (), 1, rtl_dump_file
);
3087 timevar_push (TV_JUMP
);
3088 jump_optimize (insns
, !JUMP_CROSS_JUMP
,
3089 !JUMP_NOOP_MOVES
, !JUMP_AFTER_REGSCAN
);
3090 timevar_pop (TV_JUMP
);
3094 if (flag_thread_jumps
)
3096 /* This pass of jump threading straightens out code
3097 that was kinked by loop optimization. */
3098 timevar_push (TV_JUMP
);
3099 reg_scan (insns
, max_reg_num (), 0);
3100 thread_jumps (insns
, max_reg_num (), 0);
3101 timevar_pop (TV_JUMP
);
3104 close_dump_file (DFI_cse2
, print_rtl
, insns
);
3105 timevar_pop (TV_CSE2
);
3111 cse_not_expected
= 1;
3116 /* Do control and data flow analysis; wrote some of the results to
3119 timevar_push (TV_FLOW
);
3120 open_dump_file (DFI_cfg
, decl
);
3122 find_basic_blocks (insns
, max_reg_num (), rtl_dump_file
);
3123 cleanup_cfg (insns
);
3125 close_dump_file (DFI_cfg
, print_rtl_with_bb
, insns
);
3127 if (profile_arc_flag
|| flag_test_coverage
|| flag_branch_probabilities
)
3129 timevar_push (TV_BRANCH_PROB
);
3130 open_dump_file (DFI_bp
, decl
);
3134 close_dump_file (DFI_bp
, print_rtl_with_bb
, insns
);
3135 timevar_pop (TV_BRANCH_PROB
);
3138 open_dump_file (DFI_life
, decl
);
3143 /* Discover and record the loop depth at the head of each basic
3144 block. The loop infrastructure does the real job for us. */
3145 flow_loops_find (&loops
);
3147 /* Estimate using heuristics if no profiling info is available. */
3148 estimate_probability (&loops
);
3151 flow_loops_dump (&loops
, rtl_dump_file
, 0);
3153 flow_loops_free (&loops
);
3155 life_analysis (insns
, rtl_dump_file
, PROP_FINAL
);
3156 mark_constant_function ();
3157 timevar_pop (TV_FLOW
);
3159 register_life_up_to_date
= 1;
3162 if (warn_uninitialized
|| extra_warnings
)
3164 uninitialized_vars_warning (DECL_INITIAL (decl
));
3166 setjmp_args_warning ();
3169 close_dump_file (DFI_life
, print_rtl_with_bb
, insns
);
3174 /* If -opt, try combining insns through substitution. */
3178 int rebuild_jump_labels_after_combine
= 0;
3180 timevar_push (TV_COMBINE
);
3181 open_dump_file (DFI_combine
, decl
);
3183 rebuild_jump_labels_after_combine
3184 = combine_instructions (insns
, max_reg_num ());
3186 /* Combining insns may have turned an indirect jump into a
3187 direct jump. Rebuid the JUMP_LABEL fields of jumping
3189 if (rebuild_jump_labels_after_combine
)
3191 timevar_push (TV_JUMP
);
3192 rebuild_jump_labels (insns
);
3193 timevar_pop (TV_JUMP
);
3195 timevar_push (TV_FLOW
);
3196 find_basic_blocks (insns
, max_reg_num (), rtl_dump_file
);
3197 cleanup_cfg (insns
);
3199 /* Blimey. We've got to have the CFG up to date for the call to
3200 if_convert below. However, the random deletion of blocks
3201 without updating life info can wind up with Wierd Stuff in
3202 global_live_at_end. We then run sched1, which updates things
3203 properly, discovers the wierdness and aborts. */
3204 update_life_info (NULL
, UPDATE_LIFE_GLOBAL_RM_NOTES
,
3205 PROP_DEATH_NOTES
| PROP_KILL_DEAD_CODE
3206 | PROP_SCAN_DEAD_CODE
);
3208 timevar_pop (TV_FLOW
);
3211 close_dump_file (DFI_combine
, print_rtl_with_bb
, insns
);
3212 timevar_pop (TV_COMBINE
);
3218 /* Rerun if-conversion, as combine may have simplified things enough to
3219 now meet sequence length restrictions. */
3222 timevar_push (TV_IFCVT
);
3223 open_dump_file (DFI_ce
, decl
);
3229 close_dump_file (DFI_ce
, print_rtl_with_bb
, insns
);
3230 timevar_pop (TV_IFCVT
);
3233 /* Register allocation pre-pass, to reduce number of moves
3234 necessary for two-address machines. */
3235 if (optimize
> 0 && (flag_regmove
|| flag_expensive_optimizations
))
3237 timevar_push (TV_REGMOVE
);
3238 open_dump_file (DFI_regmove
, decl
);
3240 regmove_optimize (insns
, max_reg_num (), rtl_dump_file
);
3242 close_dump_file (DFI_regmove
, print_rtl_with_bb
, insns
);
3243 timevar_pop (TV_REGMOVE
);
3249 /* Any of the several passes since flow1 will have munged register
3250 lifetime data a bit. */
3252 register_life_up_to_date
= 0;
3254 #ifdef OPTIMIZE_MODE_SWITCHING
3257 timevar_push (TV_GCSE
);
3259 if (optimize_mode_switching (NULL_PTR
))
3261 /* We did work, and so had to regenerate global life information.
3262 Take advantage of this and don't re-recompute register life
3263 information below. */
3264 register_life_up_to_date
= 1;
3267 timevar_pop (TV_GCSE
);
3271 #ifdef INSN_SCHEDULING
3273 /* Print function header into sched dump now
3274 because doing the sched analysis makes some of the dump. */
3275 if (optimize
> 0 && flag_schedule_insns
)
3277 timevar_push (TV_SCHED
);
3278 open_dump_file (DFI_sched
, decl
);
3280 /* Do control and data sched analysis,
3281 and write some of the results to dump file. */
3283 schedule_insns (rtl_dump_file
);
3285 close_dump_file (DFI_sched
, print_rtl_with_bb
, insns
);
3286 timevar_pop (TV_SCHED
);
3291 /* Register lifetime information was updated as part of verifying
3293 register_life_up_to_date
= 1;
3297 /* Determine if the current function is a leaf before running reload
3298 since this can impact optimizations done by the prologue and
3299 epilogue thus changing register elimination offsets. */
3300 current_function_is_leaf
= leaf_function_p ();
3302 timevar_push (TV_LOCAL_ALLOC
);
3303 open_dump_file (DFI_lreg
, decl
);
3305 /* Allocate pseudo-regs that are used only within 1 basic block.
3307 RUN_JUMP_AFTER_RELOAD records whether or not we need to rerun the
3308 jump optimizer after register allocation and reloading are finished. */
3310 if (! register_life_up_to_date
)
3311 recompute_reg_usage (insns
, ! optimize_size
);
3312 regclass (insns
, max_reg_num (), rtl_dump_file
);
3313 rebuild_label_notes_after_reload
= local_alloc ();
3315 timevar_pop (TV_LOCAL_ALLOC
);
3317 if (dump_file
[DFI_lreg
].enabled
)
3319 timevar_push (TV_DUMP
);
3321 dump_flow_info (rtl_dump_file
);
3322 dump_local_alloc (rtl_dump_file
);
3324 close_dump_file (DFI_lreg
, print_rtl_with_bb
, insns
);
3325 timevar_pop (TV_DUMP
);
3331 timevar_push (TV_GLOBAL_ALLOC
);
3332 open_dump_file (DFI_greg
, decl
);
3334 /* If optimizing, allocate remaining pseudo-regs. Do the reload
3335 pass fixing up any insns that are invalid. */
3338 failure
= global_alloc (rtl_dump_file
);
3341 build_insn_chain (insns
);
3342 failure
= reload (insns
, 0, rtl_dump_file
);
3345 timevar_pop (TV_GLOBAL_ALLOC
);
3348 goto exit_rest_of_compilation
;
3353 /* Do a very simple CSE pass over just the hard registers. */
3356 timevar_push (TV_RELOAD_CSE_REGS
);
3357 reload_cse_regs (insns
);
3358 timevar_pop (TV_RELOAD_CSE_REGS
);
3361 /* If optimizing, then go ahead and split insns now since we are about
3362 to recompute flow information anyway. */
3364 split_all_insns (0);
3366 /* Register allocation and reloading may have turned an indirect jump into
3367 a direct jump. If so, we must rebuild the JUMP_LABEL fields of
3368 jumping instructions. */
3369 if (rebuild_label_notes_after_reload
)
3371 timevar_push (TV_JUMP
);
3373 rebuild_jump_labels (insns
);
3375 timevar_pop (TV_JUMP
);
3378 if (dump_file
[DFI_greg
].enabled
)
3380 timevar_push (TV_DUMP
);
3382 dump_global_regs (rtl_dump_file
);
3384 close_dump_file (DFI_greg
, print_rtl_with_bb
, insns
);
3385 timevar_pop (TV_DUMP
);
3388 /* Re-create the death notes which were deleted during reload. */
3389 timevar_push (TV_FLOW2
);
3390 open_dump_file (DFI_flow2
, decl
);
3392 jump_optimize (insns
, !JUMP_CROSS_JUMP
,
3393 !JUMP_NOOP_MOVES
, !JUMP_AFTER_REGSCAN
);
3394 find_basic_blocks (insns
, max_reg_num (), rtl_dump_file
);
3396 /* On some machines, the prologue and epilogue code, or parts thereof,
3397 can be represented as RTL. Doing so lets us schedule insns between
3398 it and the rest of the code and also allows delayed branch
3399 scheduling to operate in the epilogue. */
3400 thread_prologue_and_epilogue_insns (insns
);
3404 cleanup_cfg (insns
);
3405 life_analysis (insns
, rtl_dump_file
, PROP_FINAL
);
3407 /* This is kind of a heuristic. We need to run combine_stack_adjustments
3408 even for machines with possibly nonzero RETURN_POPS_ARGS
3409 and ACCUMULATE_OUTGOING_ARGS. We expect that only ports having
3410 push instructions will have popping returns. */
3411 #ifndef PUSH_ROUNDING
3412 if (!ACCUMULATE_OUTGOING_ARGS
)
3414 combine_stack_adjustments ();
3420 flow2_completed
= 1;
3422 close_dump_file (DFI_flow2
, print_rtl_with_bb
, insns
);
3423 timevar_pop (TV_FLOW2
);
3427 timevar_push (TV_IFCVT2
);
3428 open_dump_file (DFI_ce2
, decl
);
3432 close_dump_file (DFI_ce2
, print_rtl_with_bb
, insns
);
3433 timevar_pop (TV_IFCVT2
);
3436 #ifdef HAVE_peephole2
3437 if (optimize
> 0 && flag_peephole2
)
3439 timevar_push (TV_PEEPHOLE2
);
3440 open_dump_file (DFI_peephole2
, decl
);
3442 peephole2_optimize (rtl_dump_file
);
3444 close_dump_file (DFI_peephole2
, print_rtl_with_bb
, insns
);
3445 timevar_pop (TV_PEEPHOLE2
);
3449 if (optimize
> 0 && flag_rename_registers
)
3451 timevar_push (TV_RENAME_REGISTERS
);
3452 open_dump_file (DFI_rnreg
, decl
);
3454 regrename_optimize ();
3456 close_dump_file (DFI_rnreg
, print_rtl_with_bb
, insns
);
3457 timevar_pop (TV_RENAME_REGISTERS
);
3460 #ifdef INSN_SCHEDULING
3461 if (optimize
> 0 && flag_schedule_insns_after_reload
)
3463 timevar_push (TV_SCHED2
);
3464 open_dump_file (DFI_sched2
, decl
);
3466 /* Do control and data sched analysis again,
3467 and write some more of the results to dump file. */
3469 schedule_insns (rtl_dump_file
);
3471 close_dump_file (DFI_sched2
, print_rtl_with_bb
, insns
);
3472 timevar_pop (TV_SCHED2
);
3479 #ifdef LEAF_REGISTERS
3480 current_function_uses_only_leaf_regs
3481 = optimize
> 0 && only_leaf_regs_used () && leaf_function_p ();
3484 if (optimize
> 0 && flag_reorder_blocks
)
3486 timevar_push (TV_REORDER_BLOCKS
);
3487 open_dump_file (DFI_bbro
, decl
);
3489 reorder_basic_blocks ();
3491 close_dump_file (DFI_bbro
, print_rtl_with_bb
, insns
);
3492 timevar_pop (TV_REORDER_BLOCKS
);
3495 /* One more attempt to remove jumps to .+1 left by dead-store elimination.
3496 Also do cross-jumping this time and delete no-op move insns. */
3500 timevar_push (TV_JUMP
);
3501 open_dump_file (DFI_jump2
, decl
);
3503 jump_optimize (insns
, JUMP_CROSS_JUMP
, JUMP_NOOP_MOVES
,
3504 !JUMP_AFTER_REGSCAN
);
3506 /* CFG no longer kept up to date. */
3508 close_dump_file (DFI_jump2
, print_rtl_with_bb
, insns
);
3509 timevar_pop (TV_JUMP
);
3512 /* If a machine dependent reorganization is needed, call it. */
3513 #ifdef MACHINE_DEPENDENT_REORG
3514 open_dump_file (DFI_mach
, decl
);
3516 MACHINE_DEPENDENT_REORG (insns
);
3518 close_dump_file (DFI_mach
, print_rtl_with_bb
, insns
);
3524 /* If a scheduling pass for delayed branches is to be done,
3525 call the scheduling code. */
3528 if (optimize
> 0 && flag_delayed_branch
)
3530 timevar_push (TV_DBR_SCHED
);
3531 open_dump_file (DFI_dbr
, decl
);
3533 dbr_schedule (insns
, rtl_dump_file
);
3535 close_dump_file (DFI_dbr
, print_rtl_with_bb
, insns
);
3536 timevar_pop (TV_DBR_SCHED
);
3543 /* Shorten branches.
3545 Note this must run before reg-stack because of death note (ab)use
3546 in the ia32 backend. */
3547 timevar_push (TV_SHORTEN_BRANCH
);
3548 shorten_branches (get_insns ());
3549 timevar_pop (TV_SHORTEN_BRANCH
);
3552 timevar_push (TV_REG_STACK
);
3553 open_dump_file (DFI_stack
, decl
);
3555 reg_to_stack (insns
, rtl_dump_file
);
3557 close_dump_file (DFI_stack
, print_rtl_with_bb
, insns
);
3558 timevar_pop (TV_REG_STACK
);
3564 current_function_nothrow
= nothrow_function_p ();
3565 if (current_function_nothrow
)
3566 /* Now we know that this can't throw; set the flag for the benefit
3567 of other functions later in this translation unit. */
3568 TREE_NOTHROW (current_function_decl
) = 1;
3570 /* Now turn the rtl into assembler code. */
3572 timevar_push (TV_FINAL
);
3577 /* Get the function's name, as described by its RTL. This may be
3578 different from the DECL_NAME name used in the source file. */
3580 x
= DECL_RTL (decl
);
3581 if (GET_CODE (x
) != MEM
)
3584 if (GET_CODE (x
) != SYMBOL_REF
)
3586 fnname
= XSTR (x
, 0);
3588 assemble_start_function (decl
, fnname
);
3589 final_start_function (insns
, asm_out_file
, optimize
);
3590 final (insns
, asm_out_file
, optimize
, 0);
3591 final_end_function (insns
, asm_out_file
, optimize
);
3592 assemble_end_function (decl
, fnname
);
3594 fflush (asm_out_file
);
3596 /* Release all memory allocated by flow. */
3597 free_basic_block_vars (0);
3599 /* Release all memory held by regsets now */
3600 regset_release_memory ();
3602 timevar_pop (TV_FINAL
);
3607 /* Write DBX symbols if requested */
3609 /* Note that for those inline functions where we don't initially
3610 know for certain that we will be generating an out-of-line copy,
3611 the first invocation of this routine (rest_of_compilation) will
3612 skip over this code by doing a `goto exit_rest_of_compilation;'.
3613 Later on, finish_compilation will call rest_of_compilation again
3614 for those inline functions that need to have out-of-line copies
3615 generated. During that call, we *will* be routed past here. */
3617 timevar_push (TV_SYMOUT
);
3618 #ifdef DBX_DEBUGGING_INFO
3619 if (write_symbols
== DBX_DEBUG
)
3620 dbxout_function (decl
);
3623 #ifdef DWARF_DEBUGGING_INFO
3624 if (write_symbols
== DWARF_DEBUG
)
3625 dwarfout_file_scope_decl (decl
, 0);
3628 #ifdef DWARF2_DEBUGGING_INFO
3629 if (write_symbols
== DWARF2_DEBUG
)
3630 dwarf2out_decl (decl
);
3632 timevar_pop (TV_SYMOUT
);
3634 exit_rest_of_compilation
:
3636 /* In case the function was not output,
3637 don't leave any temporary anonymous types
3638 queued up for sdb output. */
3639 #ifdef SDB_DEBUGGING_INFO
3640 if (write_symbols
== SDB_DEBUG
)
3641 sdbout_types (NULL_TREE
);
3644 reload_completed
= 0;
3645 flow2_completed
= 0;
3648 timevar_push (TV_FINAL
);
3650 /* Clear out the insn_length contents now that they are no
3652 init_insn_lengths ();
3654 /* Clear out the real_constant_chain before some of the rtx's
3655 it runs through become garbage. */
3656 clear_const_double_mem ();
3658 /* Cancel the effect of rtl_in_current_obstack. */
3659 resume_temporary_allocation ();
3661 /* Show no temporary slots allocated. */
3664 free_basic_block_vars (0);
3666 timevar_pop (TV_FINAL
);
3668 /* Make sure volatile mem refs aren't considered valid operands for
3669 arithmetic insns. We must call this here if this is a nested inline
3670 function, since the above code leaves us in the init_recog state
3671 (from final.c), and the function context push/pop code does not
3672 save/restore volatile_ok.
3674 ??? Maybe it isn't necessary for expand_start_function to call this
3675 anymore if we do it here? */
3677 init_recog_no_volatile ();
3679 /* We're done with this function. Free up memory if we can. */
3680 free_after_parsing (cfun
);
3681 if (! DECL_DEFER_OUTPUT (decl
))
3682 free_after_compilation (cfun
);
3688 timevar_pop (TV_REST_OF_COMPILATION
);
3699 printf ("Usage: %s input [switches]\n", progname
);
3700 printf ("Switches:\n");
3702 printf (" -ffixed-<register> Mark <register> as being unavailable to the compiler\n");
3703 printf (" -fcall-used-<register> Mark <register> as being corrupted by function calls\n");
3704 printf (" -fcall-saved-<register> Mark <register> as being preserved across functions\n");
3705 printf (" -finline-limit=<number> Limits the size of inlined functions to <number>\n");
3707 for (i
= NUM_ELEM (f_options
); i
--;)
3709 const char * description
= f_options
[i
].description
;
3711 if (description
!= NULL
&& * description
!= 0)
3712 printf (" -f%-21s %s\n",
3713 f_options
[i
].string
, description
);
3716 printf (" -O[number] Set optimisation level to [number]\n");
3717 printf (" -Os Optimise for space rather than speed\n");
3718 printf (" -pedantic Issue warnings needed by strict compliance to ANSI C\n");
3719 printf (" -pedantic-errors Like -pedantic except that errors are produced\n");
3720 printf (" -w Suppress warnings\n");
3721 printf (" -W Enable extra warnings\n");
3723 for (i
= NUM_ELEM (W_options
); i
--;)
3725 const char * description
= W_options
[i
].description
;
3727 if (description
!= NULL
&& * description
!= 0)
3728 printf (" -W%-21s %s\n",
3729 W_options
[i
].string
, description
);
3732 printf (" -Wunused Enable unused warnings\n");
3733 printf (" -Wid-clash-<num> Warn if 2 identifiers have the same first <num> chars\n");
3734 printf (" -Wlarger-than-<number> Warn if an object is larger than <number> bytes\n");
3735 printf (" -p Enable function profiling\n");
3736 #if defined (BLOCK_PROFILER) || defined (FUNCTION_BLOCK_PROFILER)
3737 printf (" -a Enable block profiling \n");
3739 #if defined (BLOCK_PROFILER) || defined (FUNCTION_BLOCK_PROFILER) || defined FUNCTION_BLOCK_PROFILER_EXIT
3740 printf (" -ax Enable jump profiling \n");
3742 printf (" -o <file> Place output into <file> \n");
3743 printf (" -G <number> Put global and static data smaller than <number>\n");
3744 printf (" bytes into a special section (on some targets)\n");
3746 for (i
= NUM_ELEM (debug_args
); i
--;)
3748 if (debug_args
[i
].description
!= NULL
)
3749 printf (" -g%-21s %s\n", debug_args
[i
].arg
, debug_args
[i
].description
);
3752 printf (" -aux-info <file> Emit declaration info into <file>.X\n");
3753 printf (" -quiet Do not display functions compiled or elapsed time\n");
3754 printf (" -version Display the compiler's version\n");
3755 printf (" -d[letters] Enable dumps from specific passes of the compiler\n");
3756 printf (" -dumpbase <file> Base name to be used for dumps from specific passes\n");
3757 #if defined INSN_SCHEDULING
3758 printf (" -fsched-verbose=<number> Set the verbosity level of the scheduler\n");
3760 printf (" --help Display this information\n");
3765 /* Display descriptions of language specific options.
3766 If there is no description, note that there is an undocumented option.
3767 If the description is empty, do not display anything. (This allows
3768 options to be deliberately undocumented, for whatever reason).
3769 If the option string is missing, then this is a marker, indicating
3770 that the description string is in fact the name of a language, whose
3771 language specific options are to follow. */
3773 if (NUM_ELEM (documented_lang_options
) > 1)
3775 printf ("\nLanguage specific options:\n");
3777 for (i
= 0; i
< NUM_ELEM (documented_lang_options
); i
++)
3779 const char * description
= documented_lang_options
[i
].description
;
3780 const char * option
= documented_lang_options
[i
].option
;
3782 if (description
== NULL
)
3787 printf (" %-23.23s [undocumented]\n", option
);
3789 else if (* description
== 0)
3791 else if (option
== NULL
)
3795 ("\nThere are undocumented %s specific options as well.\n",
3799 printf ("\n Options for %s:\n", description
);
3804 printf (" %-23.23s %s\n", option
, description
);
3809 printf ("\nThere are undocumented %s specific options as well.\n", lang
);
3811 if (NUM_ELEM (target_switches
) > 1
3812 #ifdef TARGET_OPTIONS
3813 || NUM_ELEM (target_options
) > 1
3821 printf ("\nTarget specific options:\n");
3823 for (i
= NUM_ELEM (target_switches
); i
--;)
3825 const char * option
= target_switches
[i
].name
;
3826 const char * description
= target_switches
[i
].description
;
3828 if (option
== NULL
|| * option
== 0)
3830 else if (description
== NULL
)
3835 printf (" -m%-21.21s [undocumented]\n", option
);
3837 else if (* description
!= 0)
3838 doc
+= printf (" -m%-21.21s %s\n", option
, description
);
3841 #ifdef TARGET_OPTIONS
3842 for (i
= NUM_ELEM (target_options
); i
--;)
3844 const char * option
= target_options
[i
].prefix
;
3845 const char * description
= target_options
[i
].description
;
3847 if (option
== NULL
|| * option
== 0)
3849 else if (description
== NULL
)
3854 printf (" -m%-21.21s [undocumented]\n", option
);
3856 else if (* description
!= 0)
3857 doc
+= printf (" -m%-21.21s %s\n", option
, description
);
3863 printf ("\nThere are undocumented target specific options as well.\n");
3865 printf (" They exist, but they are not documented.\n");
3870 /* Parse a -d... comand line switch. */
3873 decode_d_option (arg
)
3882 for (i
= 0; i
< DFI_MAX
; ++i
)
3883 dump_file
[i
].enabled
= 1;
3892 flag_print_asm_name
= 1;
3895 graph_dump_format
= vcg
;
3898 rtl_dump_and_exit
= 1;
3903 case 'D': /* These are handled by the preprocessor. */
3909 for (i
= 0; i
< DFI_MAX
; ++i
)
3910 if (c
== dump_file
[i
].debug_switch
)
3912 dump_file
[i
].enabled
= 1;
3917 warning ("unrecognized gcc debugging option: %c", c
);
3922 /* Parse a -f... comand line switch. ARG is the value after the -f.
3923 It is safe to access 'ARG - 2' to generate the full switch name.
3924 Return the number of strings consumed. */
3927 decode_f_option (arg
)
3931 const char *option_value
= NULL
;
3933 /* Search for the option in the table of binary f options. */
3934 for (j
= sizeof (f_options
) / sizeof (f_options
[0]); j
--;)
3936 if (!strcmp (arg
, f_options
[j
].string
))
3938 *f_options
[j
].variable
= f_options
[j
].on_value
;
3942 if (arg
[0] == 'n' && arg
[1] == 'o' && arg
[2] == '-'
3943 && ! strcmp (arg
+ 3, f_options
[j
].string
))
3945 *f_options
[j
].variable
= ! f_options
[j
].on_value
;
3950 if ((option_value
= skip_leading_substring (arg
, "inline-limit-"))
3951 || (option_value
= skip_leading_substring (arg
, "inline-limit=")))
3953 read_integral_parameter (option_value
, arg
- 2, inline_max_insns
);
3954 #ifdef INSN_SCHEDULING
3955 else if ((option_value
= skip_leading_substring (arg
, "sched-verbose=")))
3956 fix_sched_param ("verbose", option_value
);
3958 else if ((option_value
= skip_leading_substring (arg
, "fixed-")))
3959 fix_register (option_value
, 1, 1);
3960 else if ((option_value
= skip_leading_substring (arg
, "call-used-")))
3961 fix_register (option_value
, 0, 1);
3962 else if ((option_value
= skip_leading_substring (arg
, "call-saved-")))
3963 fix_register (option_value
, 0, 0);
3964 else if ((option_value
= skip_leading_substring (arg
, "align-loops=")))
3965 align_loops
= read_integral_parameter (option_value
, arg
- 2, align_loops
);
3966 else if ((option_value
= skip_leading_substring (arg
, "align-functions=")))
3968 = read_integral_parameter (option_value
, arg
- 2, align_functions
);
3969 else if ((option_value
= skip_leading_substring (arg
, "align-jumps=")))
3970 align_jumps
= read_integral_parameter (option_value
, arg
- 2, align_jumps
);
3971 else if ((option_value
= skip_leading_substring (arg
, "align-labels=")))
3973 = read_integral_parameter (option_value
, arg
- 2, align_labels
);
3974 else if ((option_value
3975 = skip_leading_substring (arg
, "stack-limit-register=")))
3977 int reg
= decode_reg_name (option_value
);
3979 error ("unrecognized register name `%s'", option_value
);
3981 stack_limit_rtx
= gen_rtx_REG (Pmode
, reg
);
3983 else if ((option_value
3984 = skip_leading_substring (arg
, "stack-limit-symbol=")))
3988 nm
= ggc_alloc_string (option_value
, strlen (option_value
));
3990 nm
= xstrdup (option_value
);
3991 stack_limit_rtx
= gen_rtx_SYMBOL_REF (Pmode
, nm
);
3993 else if (!strcmp (arg
, "no-stack-limit"))
3994 stack_limit_rtx
= NULL_RTX
;
3995 else if (!strcmp (arg
, "preprocessed"))
3996 /* Recognise this switch but do nothing. This prevents warnings
3997 about an unrecognized switch if cpplib has not been linked in. */
4005 /* Parse a -W... comand line switch. ARG is the value after the -W.
4006 It is safe to access 'ARG - 2' to generate the full switch name.
4007 Return the number of strings consumed. */
4010 decode_W_option (arg
)
4013 const char *option_value
= NULL
;
4016 /* Search for the option in the table of binary W options. */
4018 for (j
= sizeof (W_options
) / sizeof (W_options
[0]); j
--;)
4020 if (!strcmp (arg
, W_options
[j
].string
))
4022 *W_options
[j
].variable
= W_options
[j
].on_value
;
4026 if (arg
[0] == 'n' && arg
[1] == 'o' && arg
[2] == '-'
4027 && ! strcmp (arg
+ 3, W_options
[j
].string
))
4029 *W_options
[j
].variable
= ! W_options
[j
].on_value
;
4034 if ((option_value
= skip_leading_substring (arg
, "id-clash-")))
4036 id_clash_len
= read_integral_parameter (option_value
, arg
- 2, -1);
4038 if (id_clash_len
!= -1)
4041 else if ((option_value
= skip_leading_substring (arg
, "larger-than-")))
4043 larger_than_size
= read_integral_parameter (option_value
, arg
- 2, -1);
4045 if (larger_than_size
!= -1)
4046 warn_larger_than
= 1;
4048 else if (!strcmp (arg
, "unused"))
4052 else if (!strcmp (arg
, "no-unused"))
4062 /* Parse a -g... comand line switch. ARG is the value after the -g.
4063 It is safe to access 'ARG - 2' to generate the full switch name.
4064 Return the number of strings consumed. */
4067 decode_g_option (arg
)
4071 /* A lot of code assumes write_symbols == NO_DEBUG if the
4072 debugging level is 0 (thus -gstabs1 -gstabs0 would lose track
4073 of what debugging type has been selected). This records the
4074 selected type. It is an error to specify more than one
4076 static enum debug_info_type selected_debug_type
= NO_DEBUG
;
4077 /* Non-zero if debugging format has been explicitly set.
4078 -g and -ggdb don't explicitly set the debugging format so
4079 -gdwarf -g3 is equivalent to -gdwarf3. */
4080 static int type_explicitly_set_p
= 0;
4081 /* Indexed by enum debug_info_type. */
4082 static const char * debug_type_names
[] =
4084 "none", "stabs", "coff", "dwarf-1", "dwarf-2", "xcoff"
4087 /* The maximum admissible debug level value. */
4088 static const unsigned max_debug_level
= 3;
4090 /* Look up ARG in the table. */
4091 for (da
= debug_args
; da
->arg
; da
++)
4093 const int da_len
= strlen (da
->arg
);
4095 if (da_len
== 0 || ! strncmp (arg
, da
->arg
, da_len
))
4097 enum debug_info_type type
= da
->debug_type
;
4098 const char * p
= arg
+ da_len
;
4100 if (*p
&& (*p
< '0' || *p
> '9'))
4103 /* A debug flag without a level defaults to level 2.
4104 Note we do not want to call read_integral_parameter
4105 for that case since it will call atoi which
4108 ??? We may want to generalize the interface to
4109 read_integral_parameter to better handle this case
4110 if this case shows up often. */
4112 level
= read_integral_parameter (p
, 0, max_debug_level
+ 1);
4116 if (da_len
> 1 && *p
&& !strncmp (arg
, "dwarf", da_len
))
4118 error ("use -gdwarf -g%d for DWARF v1, level %d",
4121 error ("use -gdwarf-2 for DWARF v2");
4124 if (level
> max_debug_level
)
4127 ignoring option `%s' due to invalid debug level specification",
4129 level
= debug_info_level
;
4132 if (type
== NO_DEBUG
)
4134 type
= PREFERRED_DEBUGGING_TYPE
;
4136 if (da_len
> 1 && strncmp (arg
, "gdb", da_len
) == 0)
4138 #if defined (DWARF2_DEBUGGING_INFO) && !defined (LINKER_DOES_NOT_WORK_WITH_DWARF2)
4139 type
= DWARF2_DEBUG
;
4141 #ifdef DBX_DEBUGGING_INFO
4148 if (type
== NO_DEBUG
)
4149 warning ("`%s': unknown or unsupported -g option", arg
- 2);
4151 /* Does it conflict with an already selected type? */
4152 if (type_explicitly_set_p
4153 /* -g/-ggdb don't conflict with anything */
4154 && da
->debug_type
!= NO_DEBUG
4155 && type
!= selected_debug_type
)
4156 warning ("`%s' ignored, conflicts with `-g%s'",
4157 arg
- 2, debug_type_names
[(int) selected_debug_type
]);
4160 /* If the format has already been set, -g/-ggdb
4161 only change the debug level. */
4162 if (type_explicitly_set_p
&& da
->debug_type
== NO_DEBUG
)
4163 ; /* don't change debugging type */
4166 selected_debug_type
= type
;
4167 type_explicitly_set_p
= da
->debug_type
!= NO_DEBUG
;
4170 write_symbols
= (level
== 0
4172 : selected_debug_type
);
4173 use_gnu_debug_info_extensions
= da
->use_extensions_p
;
4174 debug_info_level
= (enum debug_info_level
) level
;
4182 warning ("`%s': unknown or unsupported -g option", arg
- 2);
4187 /* Decode the first argument in the argv as a language-independent option.
4188 Return the number of strings consumed. 'strings_processed' is the
4189 number of strings that have already been decoded in a language
4190 specific fashion before this function was invoked. */
4193 independent_decode_option (argc
, argv
, strings_processed
)
4196 unsigned int strings_processed
;
4198 char *arg
= argv
[0];
4200 if (arg
[0] != '-' || arg
[1] == 0)
4212 if (!strcmp (arg
, "-help"))
4227 /* Already been treated in main (). Do nothing. */
4231 set_target_switch (arg
+ 1);
4235 return decode_f_option (arg
+ 1);
4238 if (strings_processed
== 0)
4239 return decode_g_option (arg
+ 1);
4241 return strings_processed
;
4244 if (!strcmp (arg
, "dumpbase"))
4249 dump_base_name
= argv
[1];
4253 decode_d_option (arg
+ 1);
4257 if (!strcmp (arg
, "pedantic"))
4259 else if (!strcmp (arg
, "pedantic-errors"))
4260 flag_pedantic_errors
= pedantic
= 1;
4261 else if (arg
[1] == 0)
4268 if (!strcmp (arg
, "quiet"))
4275 if (!strcmp (arg
, "version"))
4283 inhibit_warnings
= 1;
4292 /* We save the value of warn_uninitialized, since if they put
4293 -Wuninitialized on the command line, we need to generate a
4294 warning about not using it without also specifying -O. */
4295 if (warn_uninitialized
!= 1)
4296 warn_uninitialized
= 2;
4299 return decode_W_option (arg
+ 1);
4305 #if !defined (BLOCK_PROFILER) || !defined (FUNCTION_BLOCK_PROFILER)
4306 warning ("`-a' option (basic block profile) not supported");
4308 profile_block_flag
= (profile_block_flag
< 2) ? 1 : 3;
4311 else if (!strcmp (arg
, "ax"))
4313 #if !defined (FUNCTION_BLOCK_PROFILER_EXIT) || !defined (BLOCK_PROFILER) || !defined (FUNCTION_BLOCK_PROFILER)
4314 warning ("`-ax' option (jump profiling) not supported");
4316 profile_block_flag
= (!profile_block_flag
4317 || profile_block_flag
== 2) ? 2 : 3;
4320 else if (!strncmp (arg
, "aux-info", 8))
4322 flag_gen_aux_info
= 1;
4328 aux_info_file_name
= argv
[1];
4332 aux_info_file_name
= arg
+ 8;
4344 asm_file_name
= argv
[1];
4359 g_switch_val
= read_integral_parameter (argv
[1], 0, -1);
4364 g_switch_val
= read_integral_parameter (arg
+ 1, 0, -1);
4368 if (g_switch_val
== -1)
4372 g_switch_set
= TRUE
;
4373 g_switch_value
= g_switch_val
;
4383 /* Entry point of cc1/c++. Decode command args, then call compile_file.
4384 Exit code is 35 if can't open files, 34 if fatal error,
4385 33 if had nonfatal errors, else success. */
4387 extern int main
PARAMS ((int, char **));
4397 /* save in case md file wants to emit args as a comment. */
4401 p
= argv
[0] + strlen (argv
[0]);
4402 while (p
!= argv
[0] && !IS_DIR_SEPARATOR (p
[-1]))
4406 #ifdef HAVE_LC_MESSAGES
4407 setlocale (LC_MESSAGES
, "");
4409 (void) bindtextdomain (PACKAGE
, localedir
);
4410 (void) textdomain (PACKAGE
);
4412 signal (SIGFPE
, float_signal
);
4415 signal (SIGPIPE
, pipe_closed
);
4418 decl_printable_name
= decl_name
;
4419 lang_expand_expr
= (lang_expand_expr_t
) do_abort
;
4421 /* Initialize whether `char' is signed. */
4422 flag_signed_char
= DEFAULT_SIGNED_CHAR
;
4423 #ifdef DEFAULT_SHORT_ENUMS
4424 /* Initialize how much space enums occupy, by default. */
4425 flag_short_enums
= DEFAULT_SHORT_ENUMS
;
4428 /* Initialize the garbage-collector. */
4430 ggc_add_root (&input_file_stack
, 1, sizeof input_file_stack
,
4432 ggc_add_rtx_root (&stack_limit_rtx
, 1);
4433 ggc_add_tree_root (¤t_function_decl
, 1);
4434 ggc_add_tree_root (¤t_function_func_begin_label
, 1);
4436 /* Perform language-specific options intialization. */
4437 lang_init_options ();
4439 /* Scan to see what optimization level has been specified. That will
4440 determine the default value of many flags. */
4441 for (i
= 1; i
< argc
; i
++)
4443 if (!strcmp (argv
[i
], "-O"))
4448 else if (argv
[i
][0] == '-' && argv
[i
][1] == 'O')
4450 /* Handle -Os, -O2, -O3, -O69, ... */
4451 char *p
= &argv
[i
][2];
4453 if ((p
[0] == 's') && (p
[1] == 0))
4457 /* Optimizing for size forces optimize to be 2. */
4462 const int optimize_val
= read_integral_parameter (p
, p
- 2, -1);
4463 if (optimize_val
!= -1)
4465 optimize
= optimize_val
;
4475 flag_thread_jumps
= 1;
4477 flag_delayed_branch
= 1;
4479 #ifdef CAN_DEBUG_WITHOUT_FP
4480 flag_omit_frame_pointer
= 1;
4486 flag_optimize_sibling_calls
= 1;
4487 flag_cse_follow_jumps
= 1;
4488 flag_cse_skip_blocks
= 1;
4490 flag_expensive_optimizations
= 1;
4491 flag_strength_reduce
= 1;
4492 flag_rerun_cse_after_loop
= 1;
4493 flag_rerun_loop_opt
= 1;
4494 flag_caller_saves
= 1;
4497 #ifdef INSN_SCHEDULING
4498 flag_schedule_insns
= 1;
4499 flag_schedule_insns_after_reload
= 1;
4502 flag_strict_aliasing
= 1;
4503 flag_delete_null_pointer_checks
= 1;
4508 flag_inline_functions
= 1;
4511 if (optimize
< 2 || optimize_size
)
4516 align_functions
= 1;
4519 /* Initialize target_flags before OPTIMIZATION_OPTIONS so the latter can
4522 set_target_switch ("");
4524 #ifdef OPTIMIZATION_OPTIONS
4525 /* Allow default optimizations to be specified on a per-machine basis. */
4526 OPTIMIZATION_OPTIONS (optimize
, optimize_size
);
4529 /* Initialize register usage now so switches may override. */
4532 /* Perform normal command line switch decoding. */
4533 for (i
= 1; i
< argc
;)
4535 unsigned int lang_processed
;
4536 unsigned int indep_processed
;
4538 /* Give the language a chance to decode the option for itself. */
4539 lang_processed
= lang_decode_option (argc
- i
, argv
+ i
);
4541 /* Now see if the option also has a language independent meaning.
4542 Some options are both language specific and language independent,
4543 eg --help. It is possible that there might be options that should
4544 only be decoded in a language independent way if they were not
4545 decoded in a language specific way, which is why 'lang_processed'
4547 indep_processed
= independent_decode_option (argc
- i
, argv
+ i
,
4550 if (lang_processed
|| indep_processed
)
4551 i
+= (lang_processed
> indep_processed
4552 ? lang_processed
: indep_processed
);
4555 const char * option
= NULL
;
4556 const char * lang
= NULL
;
4559 /* It is possible that the command line switch is not valid for the
4560 current language, but it is valid for another language. In order
4561 to be compatible with previous versions of the compiler (which
4562 did not issue an error message in this case) we check for this
4563 possibility here. If we do find a match, then if extra_warnings
4564 is set we generate a warning message, otherwise we will just
4565 ignore the option. */
4566 for (j
= 0; j
< NUM_ELEM (documented_lang_options
); j
++)
4568 option
= documented_lang_options
[j
].option
;
4571 lang
= documented_lang_options
[j
].description
;
4572 else if (! strncmp (argv
[i
], option
, strlen (option
)))
4576 if (j
!= NUM_ELEM (documented_lang_options
))
4580 warning ("Ignoring command line option '%s'", argv
[i
]);
4583 (It is valid for %s but not the selected language)", lang
);
4587 error ("Unrecognized option `%s'", argv
[i
]);
4593 /* Checker uses the frame pointer. */
4594 if (flag_check_memory_usage
)
4595 flag_omit_frame_pointer
= 0;
4599 /* Inlining does not work if not optimizing,
4600 so force it not to be done. */
4604 /* The c_decode_option and lang_decode_option functions set
4605 this to `2' if -Wall is used, so we can avoid giving out
4606 lots of errors for people who don't realize what -Wall does. */
4607 if (warn_uninitialized
== 1)
4608 warning ("-Wuninitialized is not supported without -O");
4611 #ifdef OVERRIDE_OPTIONS
4612 /* Some machines may reject certain combinations of options. */
4616 if (exceptions_via_longjmp
== 2)
4618 #ifdef DWARF2_UNWIND_INFO
4619 exceptions_via_longjmp
= ! DWARF2_UNWIND_INFO
;
4621 #ifdef IA64_UNWIND_INFO
4622 exceptions_via_longjmp
= ! IA64_UNWIND_INFO
;
4624 exceptions_via_longjmp
= 1;
4629 /* Since each function gets its own handler data, we can't support the
4630 new model currently, since it depend on a specific rethrow label
4631 which is declared at the front of the table, and we can only
4632 have one such symbol in a file. */
4633 #ifdef IA64_UNWIND_INFO
4634 flag_new_exceptions
= 0;
4637 /* Set up the align_*_log variables, defaulting them to 1 if they
4638 were still unset. */
4639 if (align_loops
<= 0) align_loops
= 1;
4640 align_loops_log
= floor_log2 (align_loops
*2-1);
4641 if (align_jumps
<= 0) align_jumps
= 1;
4642 align_jumps_log
= floor_log2 (align_jumps
*2-1);
4643 if (align_labels
<= 0) align_labels
= 1;
4644 align_labels_log
= floor_log2 (align_labels
*2-1);
4645 if (align_functions
<= 0) align_functions
= 1;
4646 align_functions_log
= floor_log2 (align_functions
*2-1);
4648 if (profile_block_flag
== 3)
4650 warning ("`-ax' and `-a' are conflicting options. `-a' ignored.");
4651 profile_block_flag
= 2;
4654 /* Unrolling all loops implies that standard loop unrolling must also
4656 if (flag_unroll_all_loops
)
4657 flag_unroll_loops
= 1;
4658 /* Loop unrolling requires that strength_reduction be on also. Silently
4659 turn on strength reduction here if it isn't already on. Also, the loop
4660 unrolling code assumes that cse will be run after loop, so that must
4661 be turned on also. */
4662 if (flag_unroll_loops
)
4664 flag_strength_reduce
= 1;
4665 flag_rerun_cse_after_loop
= 1;
4668 /* Warn about options that are not supported on this machine. */
4669 #ifndef INSN_SCHEDULING
4670 if (flag_schedule_insns
|| flag_schedule_insns_after_reload
)
4671 warning ("instruction scheduling not supported on this target machine");
4674 if (flag_delayed_branch
)
4675 warning ("this target machine does not have delayed branches");
4678 user_label_prefix
= USER_LABEL_PREFIX
;
4679 if (flag_leading_underscore
!= -1)
4681 /* If the default prefix is more complicated than "" or "_",
4682 issue a warning and ignore this option. */
4683 if (user_label_prefix
[0] == 0 ||
4684 (user_label_prefix
[0] == '_' && user_label_prefix
[1] == 0))
4686 user_label_prefix
= flag_leading_underscore
? "_" : "";
4689 warning ("-f%sleading-underscore not supported on this target machine",
4690 flag_leading_underscore
? "" : "no-");
4693 /* If we are in verbose mode, write out the version and maybe all the
4694 option flags in use. */
4697 print_version (stderr
, "");
4699 print_switch_values (stderr
, 0, MAX_LINE
, "", " ", "\n");
4702 compile_file (filename
);
4704 #if !defined(OS2) && !defined(VMS) && (!defined(_WIN32) || defined (__CYGWIN__)) && !defined(__INTERIX)
4707 char *lim
= (char *) sbrk (0);
4709 fnotice (stderr
, "Data size %ld.\n", (long) (lim
- (char *) &environ
));
4714 system ("ps -l 1>&2");
4717 #endif /* not USG */
4720 #endif /* ! OS2 && ! VMS && (! _WIN32 || CYGWIN) && ! __INTERIX */
4723 return (FATAL_EXIT_CODE
);
4725 return (FATAL_EXIT_CODE
);
4726 return (SUCCESS_EXIT_CODE
);
4729 /* Decode -m switches. */
4730 /* Decode the switch -mNAME. */
4733 set_target_switch (name
)
4737 int valid_target_option
= 0;
4739 for (j
= 0; j
< sizeof target_switches
/ sizeof target_switches
[0]; j
++)
4740 if (!strcmp (target_switches
[j
].name
, name
))
4742 if (target_switches
[j
].value
< 0)
4743 target_flags
&= ~-target_switches
[j
].value
;
4745 target_flags
|= target_switches
[j
].value
;
4746 valid_target_option
= 1;
4749 #ifdef TARGET_OPTIONS
4750 if (!valid_target_option
)
4751 for (j
= 0; j
< sizeof target_options
/ sizeof target_options
[0]; j
++)
4753 int len
= strlen (target_options
[j
].prefix
);
4754 if (!strncmp (target_options
[j
].prefix
, name
, len
))
4756 *target_options
[j
].variable
= name
+ len
;
4757 valid_target_option
= 1;
4762 if (!valid_target_option
)
4763 error ("Invalid option `%s'", name
);
4766 /* Print version information to FILE.
4767 Each line begins with INDENT (for the case where FILE is the
4768 assembler output file). */
4771 print_version (file
, indent
)
4776 #define __VERSION__ "[?]"
4780 "%s%s%s version %s (%s) compiled by GNU C version %s.\n"
4782 "%s%s%s version %s (%s) compiled by CC.\n"
4784 , indent
, *indent
!= 0 ? " " : "",
4785 language_string
, version_string
, TARGET_NAME
, __VERSION__
);
4788 /* Print an option value and return the adjusted position in the line.
4789 ??? We don't handle error returns from fprintf (disk full); presumably
4790 other code will catch a disk full though. */
4793 print_single_switch (file
, pos
, max
, indent
, sep
, term
, type
, name
)
4796 const char *indent
, *sep
, *term
, *type
, *name
;
4798 /* The ultrix fprintf returns 0 on success, so compute the result we want
4799 here since we need it for the following test. */
4800 int len
= strlen (sep
) + strlen (type
) + strlen (name
);
4805 fprintf (file
, "%s", term
);
4810 fprintf (file
, "%s", indent
);
4811 pos
= strlen (indent
);
4813 fprintf (file
, "%s%s%s", sep
, type
, name
);
4818 /* Print active target switches to FILE.
4819 POS is the current cursor position and MAX is the size of a "line".
4820 Each line begins with INDENT and ends with TERM.
4821 Each switch is separated from the next by SEP. */
4824 print_switch_values (file
, pos
, max
, indent
, sep
, term
)
4827 const char *indent
, *sep
, *term
;
4832 /* Print the options as passed. */
4834 pos
= print_single_switch (file
, pos
, max
, indent
, *indent
? " " : "", term
,
4835 _("options passed: "), "");
4837 for (p
= &save_argv
[1]; *p
!= NULL
; p
++)
4841 if (strcmp (*p
, "-o") == 0)
4847 if (strcmp (*p
, "-quiet") == 0)
4849 if (strcmp (*p
, "-version") == 0)
4854 pos
= print_single_switch (file
, pos
, max
, indent
, sep
, term
, *p
, "");
4857 fprintf (file
, "%s", term
);
4859 /* Print the -f and -m options that have been enabled.
4860 We don't handle language specific options but printing argv
4863 pos
= print_single_switch (file
, 0, max
, indent
, *indent
? " " : "", term
,
4864 _("options enabled: "), "");
4866 for (j
= 0; j
< sizeof f_options
/ sizeof f_options
[0]; j
++)
4867 if (*f_options
[j
].variable
== f_options
[j
].on_value
)
4868 pos
= print_single_switch (file
, pos
, max
, indent
, sep
, term
,
4869 "-f", f_options
[j
].string
);
4871 /* Print target specific options. */
4873 for (j
= 0; j
< sizeof target_switches
/ sizeof target_switches
[0]; j
++)
4874 if (target_switches
[j
].name
[0] != '\0'
4875 && target_switches
[j
].value
> 0
4876 && ((target_switches
[j
].value
& target_flags
)
4877 == target_switches
[j
].value
))
4879 pos
= print_single_switch (file
, pos
, max
, indent
, sep
, term
,
4880 "-m", target_switches
[j
].name
);
4883 #ifdef TARGET_OPTIONS
4884 for (j
= 0; j
< sizeof target_options
/ sizeof target_options
[0]; j
++)
4885 if (*target_options
[j
].variable
!= NULL
)
4888 sprintf (prefix
, "-m%s", target_options
[j
].prefix
);
4889 pos
= print_single_switch (file
, pos
, max
, indent
, sep
, term
,
4890 prefix
, *target_options
[j
].variable
);
4894 fprintf (file
, "%s", term
);
4897 /* Record the beginning of a new source file, named FILENAME. */
4900 debug_start_source_file (filename
)
4901 register const char *filename ATTRIBUTE_UNUSED
;
4903 #ifdef DBX_DEBUGGING_INFO
4904 if (write_symbols
== DBX_DEBUG
)
4905 dbxout_start_new_source_file (filename
);
4907 #ifdef DWARF_DEBUGGING_INFO
4908 if (debug_info_level
== DINFO_LEVEL_VERBOSE
4909 && write_symbols
== DWARF_DEBUG
)
4910 dwarfout_start_new_source_file (filename
);
4911 #endif /* DWARF_DEBUGGING_INFO */
4912 #ifdef DWARF2_DEBUGGING_INFO
4913 if (debug_info_level
== DINFO_LEVEL_VERBOSE
4914 && write_symbols
== DWARF2_DEBUG
)
4915 dwarf2out_start_source_file (filename
);
4916 #endif /* DWARF2_DEBUGGING_INFO */
4917 #ifdef SDB_DEBUGGING_INFO
4918 if (write_symbols
== SDB_DEBUG
)
4919 sdbout_start_new_source_file (filename
);
4923 /* Record the resumption of a source file. LINENO is the line number in
4924 the source file we are returning to. */
4927 debug_end_source_file (lineno
)
4928 register unsigned lineno ATTRIBUTE_UNUSED
;
4930 #ifdef DBX_DEBUGGING_INFO
4931 if (write_symbols
== DBX_DEBUG
)
4932 dbxout_resume_previous_source_file ();
4934 #ifdef DWARF_DEBUGGING_INFO
4935 if (debug_info_level
== DINFO_LEVEL_VERBOSE
4936 && write_symbols
== DWARF_DEBUG
)
4937 dwarfout_resume_previous_source_file (lineno
);
4938 #endif /* DWARF_DEBUGGING_INFO */
4939 #ifdef DWARF2_DEBUGGING_INFO
4940 if (debug_info_level
== DINFO_LEVEL_VERBOSE
4941 && write_symbols
== DWARF2_DEBUG
)
4942 dwarf2out_end_source_file ();
4943 #endif /* DWARF2_DEBUGGING_INFO */
4944 #ifdef SDB_DEBUGGING_INFO
4945 if (write_symbols
== SDB_DEBUG
)
4946 sdbout_resume_previous_source_file ();
4950 /* Called from check_newline in c-parse.y. The `buffer' parameter contains
4951 the tail part of the directive line, i.e. the part which is past the
4952 initial whitespace, #, whitespace, directive-name, whitespace part. */
4955 debug_define (lineno
, buffer
)
4956 register unsigned lineno ATTRIBUTE_UNUSED
;
4957 register char *buffer ATTRIBUTE_UNUSED
;
4959 #ifdef DWARF_DEBUGGING_INFO
4960 if (debug_info_level
== DINFO_LEVEL_VERBOSE
4961 && write_symbols
== DWARF_DEBUG
)
4962 dwarfout_define (lineno
, buffer
);
4963 #endif /* DWARF_DEBUGGING_INFO */
4964 #ifdef DWARF2_DEBUGGING_INFO
4965 if (debug_info_level
== DINFO_LEVEL_VERBOSE
4966 && write_symbols
== DWARF2_DEBUG
)
4967 dwarf2out_define (lineno
, buffer
);
4968 #endif /* DWARF2_DEBUGGING_INFO */
4971 /* Called from check_newline in c-parse.y. The `buffer' parameter contains
4972 the tail part of the directive line, i.e. the part which is past the
4973 initial whitespace, #, whitespace, directive-name, whitespace part. */
4976 debug_undef (lineno
, buffer
)
4977 register unsigned lineno ATTRIBUTE_UNUSED
;
4978 register char *buffer ATTRIBUTE_UNUSED
;
4980 #ifdef DWARF_DEBUGGING_INFO
4981 if (debug_info_level
== DINFO_LEVEL_VERBOSE
4982 && write_symbols
== DWARF_DEBUG
)
4983 dwarfout_undef (lineno
, buffer
);
4984 #endif /* DWARF_DEBUGGING_INFO */
4985 #ifdef DWARF2_DEBUGGING_INFO
4986 if (debug_info_level
== DINFO_LEVEL_VERBOSE
4987 && write_symbols
== DWARF2_DEBUG
)
4988 dwarf2out_undef (lineno
, buffer
);
4989 #endif /* DWARF2_DEBUGGING_INFO */
4992 /* Returns nonzero if it is appropriate not to emit any debugging
4993 information for BLOCK, because it doesn't contain any instructions.
4994 This may not be the case for blocks containing nested functions, since
4995 we may actually call such a function even though the BLOCK information
4999 debug_ignore_block (block
)
5000 tree block ATTRIBUTE_UNUSED
;
5002 /* Never delete the BLOCK for the outermost scope
5003 of the function; we can refer to names from
5004 that scope even if the block notes are messed up. */
5005 if (is_body_block (block
))
5008 #ifdef DWARF2_DEBUGGING_INFO
5009 if (write_symbols
== DWARF2_DEBUG
)
5010 return dwarf2out_ignore_block (block
);