1 /* Top level of GNU C compiler
2 Copyright (C) 1987, 1988, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
3 1999, 2000 Free Software Foundation, Inc.
5 This file is part of GNU CC.
7 GNU CC is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
12 GNU CC is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GNU CC; see the file COPYING. If not, write to
19 the Free Software Foundation, 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
22 /* This is the top level of cc1/c++.
23 It parses command args, opens files, invokes the various passes
24 in the proper order, and counts the time used by each.
25 Error messages and low-level interface to malloc also handled here. */
28 #undef FLOAT /* This is for hpux. They should change hpux. */
29 #undef FFS /* Some systems define this in param.h. */
34 #ifdef HAVE_SYS_RESOURCE_H
35 # include <sys/resource.h>
38 #ifdef HAVE_SYS_TIMES_H
39 # include <sys/times.h>
47 #include "insn-attr.h"
48 #include "insn-codes.h"
49 #include "insn-config.h"
50 #include "hard-reg-set.h"
58 #include "basic-block.h"
65 #include "diagnostic.h"
68 #ifndef ACCUMULATE_OUTGOING_ARGS
69 #define ACCUMULATE_OUTGOING_ARGS 0
72 #ifdef DWARF_DEBUGGING_INFO
76 #if defined (DWARF2_UNWIND_INFO) || defined (DWARF2_DEBUGGING_INFO)
77 #include "dwarf2out.h"
80 #if defined(DBX_DEBUGGING_INFO) || defined(XCOFF_DEBUGGING_INFO)
84 #ifdef SDB_DEBUGGING_INFO
88 #ifdef XCOFF_DEBUGGING_INFO
93 /* The extra parameters substantially improve the I/O performance. */
96 vms_fopen (fname
, type
)
100 /* The <stdio.h> in the gcc-vms-1.42 distribution prototypes fopen with two
101 fixed arguments, which matches ANSI's specification but not VAXCRTL's
102 pre-ANSI implementation. This hack circumvents the mismatch problem. */
103 FILE *(*vmslib_fopen
)() = (FILE *(*)()) fopen
;
106 return (*vmslib_fopen
) (fname
, type
, "mbc=32",
107 "deq=64", "fop=tef", "shr=nil");
109 return (*vmslib_fopen
) (fname
, type
, "mbc=32");
112 #define fopen vms_fopen
115 #ifndef DEFAULT_GDB_EXTENSIONS
116 #define DEFAULT_GDB_EXTENSIONS 1
119 /* If more than one debugging type is supported, you must define
120 PREFERRED_DEBUGGING_TYPE to choose a format in a system-dependent way.
122 This is one long line cause VAXC can't handle a \-newline. */
123 #if 1 < (defined (DBX_DEBUGGING_INFO) + defined (SDB_DEBUGGING_INFO) + defined (DWARF_DEBUGGING_INFO) + defined (DWARF2_DEBUGGING_INFO) + defined (XCOFF_DEBUGGING_INFO))
124 #ifndef PREFERRED_DEBUGGING_TYPE
125 You Lose
! You must define PREFERRED_DEBUGGING_TYPE
!
126 #endif /* no PREFERRED_DEBUGGING_TYPE */
127 #else /* Only one debugging format supported. Define PREFERRED_DEBUGGING_TYPE
128 so the following code needn't care. */
129 #ifdef DBX_DEBUGGING_INFO
130 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
132 #ifdef SDB_DEBUGGING_INFO
133 #define PREFERRED_DEBUGGING_TYPE SDB_DEBUG
135 #ifdef DWARF_DEBUGGING_INFO
136 #define PREFERRED_DEBUGGING_TYPE DWARF_DEBUG
138 #ifdef DWARF2_DEBUGGING_INFO
139 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
141 #ifdef XCOFF_DEBUGGING_INFO
142 #define PREFERRED_DEBUGGING_TYPE XCOFF_DEBUG
144 #endif /* More than one debugger format enabled. */
146 /* If still not defined, must have been because no debugging formats
148 #ifndef PREFERRED_DEBUGGING_TYPE
149 #define PREFERRED_DEBUGGING_TYPE NO_DEBUG
152 #if defined (HAVE_DECL_ENVIRON) && !HAVE_DECL_ENVIRON
153 extern char **environ
;
156 /* Carry information from ASM_DECLARE_OBJECT_NAME
157 to ASM_FINISH_DECLARE_OBJECT. */
159 extern int size_directive_output
;
160 extern tree last_assemble_variable_decl
;
162 static void set_target_switch
PARAMS ((const char *));
163 static const char *decl_name
PARAMS ((tree
, int));
165 static void float_signal
PARAMS ((int)) ATTRIBUTE_NORETURN
;
166 static void crash_signal
PARAMS ((int)) ATTRIBUTE_NORETURN
;
167 #ifdef ASM_IDENTIFY_LANGUAGE
168 /* This might or might not be used in ASM_IDENTIFY_LANGUAGE. */
169 static void output_lang_identify
PARAMS ((FILE *)) ATTRIBUTE_UNUSED
;
171 static void compile_file
PARAMS ((const char *));
172 static void display_help
PARAMS ((void));
173 static void mark_file_stack
PARAMS ((void *));
175 static void decode_d_option
PARAMS ((const char *));
176 static int decode_f_option
PARAMS ((const char *));
177 static int decode_W_option
PARAMS ((const char *));
178 static int decode_g_option
PARAMS ((const char *));
179 static unsigned int independent_decode_option
PARAMS ((int, char **));
181 static void print_version
PARAMS ((FILE *, const char *));
182 static int print_single_switch
PARAMS ((FILE *, int, int, const char *,
183 const char *, const char *,
184 const char *, const char *));
185 static void print_switch_values
PARAMS ((FILE *, int, int, const char *,
186 const char *, const char *));
188 /* Length of line when printing switch values. */
191 /* Name of program invoked, sans directories. */
193 const char *progname
;
195 /* Copy of arguments to main. */
199 /* Name of current original source file (what was input to cpp).
200 This comes from each #-command in the actual input. */
202 const char *input_filename
;
204 /* Name of top-level original source file (what was input to cpp).
205 This comes from the #-command at the beginning of the actual input.
206 If there isn't any there, then this is the cc1 input file name. */
208 const char *main_input_filename
;
210 /* Current line number in real source file. */
214 /* Nonzero if it is unsafe to create any new pseudo registers. */
217 /* Stack of currently pending input files. */
219 struct file_stack
*input_file_stack
;
221 /* Incremented on each change to input_file_stack. */
222 int input_file_stack_tick
;
224 /* Name to use as base of names for dump output files. */
226 const char *dump_base_name
;
228 /* Bit flags that specify the machine subtype we are compiling for.
229 Bits are tested using macros TARGET_... defined in the tm.h file
230 and set by `-m...' switches. Must be defined in rtlanal.c. */
232 extern int target_flags
;
234 /* Describes a dump file. */
236 struct dump_file_info
238 /* The unique extension to apply, e.g. ".jump". */
239 const char *const extension
;
241 /* The -d<c> character that enables this dump file. */
242 char const debug_switch
;
244 /* True if there is a corresponding graph dump file. */
245 char const graph_dump_p
;
247 /* True if the user selected this dump. */
250 /* True if the files have been initialized (ie truncated). */
254 /* Enumerate the extant dump files. */
291 /* Describes all the dump files. Should be kept in order of the
292 pass and in sync with dump_file_index above.
294 Remaining -d letters:
300 struct dump_file_info dump_file
[DFI_MAX
] =
302 { "rtl", 'r', 0, 0, 0 },
303 { "sibling", 'i', 0, 0, 0 },
304 { "jump", 'j', 0, 0, 0 },
305 { "cse", 's', 0, 0, 0 },
306 { "addressof", 'F', 0, 0, 0 },
307 { "ssa", 'e', 1, 0, 0 },
308 { "dce", 'X', 1, 0, 0 },
309 { "ussa", 'e', 1, 0, 0 }, /* Yes, duplicate enable switch. */
310 { "gcse", 'G', 1, 0, 0 },
311 { "loop", 'L', 1, 0, 0 },
312 { "cse2", 't', 1, 0, 0 },
313 { "cfg", 'f', 1, 0, 0 },
314 { "bp", 'b', 1, 0, 0 },
315 { "life", 'f', 1, 0, 0 }, /* Yes, duplicate enable switch. */
316 { "combine", 'c', 1, 0, 0 },
317 { "ce", 'C', 1, 0, 0 },
318 { "regmove", 'N', 1, 0, 0 },
319 { "sched", 'S', 1, 0, 0 },
320 { "lreg", 'l', 1, 0, 0 },
321 { "greg", 'g', 1, 0, 0 },
322 { "flow2", 'w', 1, 0, 0 },
323 { "ce2", 'E', 1, 0, 0 },
324 { "peephole2", 'z', 1, 0, 0 },
325 { "rnreg", 'n', 1, 0, 0 },
326 { "sched2", 'R', 1, 0, 0 },
327 { "bbro", 'B', 1, 0, 0 },
328 { "jump2", 'J', 1, 0, 0 },
329 { "mach", 'M', 1, 0, 0 },
330 { "dbr", 'd', 0, 0, 0 },
331 { "stack", 'k', 1, 0, 0 },
334 static int open_dump_file
PARAMS ((enum dump_file_index
, tree
));
335 static void close_dump_file
PARAMS ((enum dump_file_index
,
336 void (*) (FILE *, rtx
), rtx
));
338 /* Other flags saying which kinds of debugging dump have been requested. */
340 int rtl_dump_and_exit
;
341 int flag_print_asm_name
;
342 static int flag_print_mem
;
343 static int version_flag
;
344 static char *filename
;
345 enum graph_dump_types graph_dump_format
;
347 /* Name for output file of assembly code, specified with -o. */
351 /* Value of the -G xx switch, and whether it was passed or not. */
355 /* Type(s) of debugging information we are producing (if any).
356 See flags.h for the definitions of the different possible
357 types of debugging information. */
358 enum debug_info_type write_symbols
= NO_DEBUG
;
360 /* Level of debugging information we are producing. See flags.h
361 for the definitions of the different possible levels. */
362 enum debug_info_level debug_info_level
= DINFO_LEVEL_NONE
;
364 /* Nonzero means use GNU-only extensions in the generated symbolic
365 debugging information. */
366 /* Currently, this only has an effect when write_symbols is set to
367 DBX_DEBUG, XCOFF_DEBUG, or DWARF_DEBUG. */
368 int use_gnu_debug_info_extensions
= 0;
370 /* Nonzero means do optimizations. -O.
371 Particular numeric values stand for particular amounts of optimization;
372 thus, -O2 stores 2 here. However, the optimizations beyond the basic
373 ones are not controlled directly by this variable. Instead, they are
374 controlled by individual `flag_...' variables that are defaulted
375 based on this variable. */
379 /* Nonzero means optimize for size. -Os.
380 The only valid values are zero and non-zero. When optimize_size is
381 non-zero, optimize defaults to 2, but certain individual code
382 bloating optimizations are disabled. */
384 int optimize_size
= 0;
386 /* Number of error messages and warning messages so far. */
389 int warningcount
= 0;
392 /* The FUNCTION_DECL for the function currently being compiled,
393 or 0 if between functions. */
394 tree current_function_decl
;
396 /* Set to the FUNC_BEGIN label of the current function, or NULL_TREE
398 tree current_function_func_begin_label
;
400 /* Pointer to function to compute the name to use to print a declaration.
401 DECL is the declaration in question.
402 VERBOSITY determines what information will be printed:
403 0: DECL_NAME, demangled as necessary.
404 1: and scope information.
405 2: and any other information that might be interesting, such as function
406 parameter types in C++. */
408 const char *(*decl_printable_name
) PARAMS ((tree
, int));
410 /* Pointer to function to compute rtl for a language-specific tree code. */
412 typedef rtx (*lang_expand_expr_t
)
413 PARAMS ((union tree_node
*, rtx
, enum machine_mode
,
414 enum expand_modifier modifier
));
416 lang_expand_expr_t lang_expand_expr
= 0;
418 tree (*lang_expand_constant
) PARAMS ((tree
)) = 0;
420 /* Pointer to function to finish handling an incomplete decl at the
421 end of compilation. */
423 void (*incomplete_decl_finalize_hook
) PARAMS ((tree
)) = 0;
425 /* Nonzero if generating code to do profiling. */
427 int profile_flag
= 0;
429 /* Nonzero if generating code to do profiling on a line-by-line basis. */
431 int profile_block_flag
;
433 /* Nonzero if generating code to profile program flow graph arcs. */
435 int profile_arc_flag
= 0;
437 /* Nonzero if generating info for gcov to calculate line test coverage. */
439 int flag_test_coverage
= 0;
441 /* Nonzero indicates that branch taken probabilities should be calculated. */
443 int flag_branch_probabilities
= 0;
445 /* Nonzero if basic blocks should be reordered. */
447 int flag_reorder_blocks
= 0;
449 /* Nonzero if registers should be renamed. */
451 int flag_rename_registers
= 0;
453 /* Nonzero for -pedantic switch: warn about anything
454 that standard spec forbids. */
458 /* Temporarily suppress certain warnings.
459 This is set while reading code from a system header file. */
461 int in_system_header
= 0;
463 /* Don't print functions as they are compiled and don't print
464 times taken by the various passes. -quiet. */
470 /* Nonzero means `char' should be signed. */
472 int flag_signed_char
;
474 /* Nonzero means give an enum type only as many bytes as it needs. */
476 int flag_short_enums
;
478 /* Nonzero for -fcaller-saves: allocate values in regs that need to
479 be saved across function calls, if that produces overall better code.
480 Optional now, so people can test it. */
482 #ifdef DEFAULT_CALLER_SAVES
483 int flag_caller_saves
= 1;
485 int flag_caller_saves
= 0;
488 /* Nonzero if structures and unions should be returned in memory.
490 This should only be defined if compatibility with another compiler or
491 with an ABI is needed, because it results in slower code. */
493 #ifndef DEFAULT_PCC_STRUCT_RETURN
494 #define DEFAULT_PCC_STRUCT_RETURN 1
497 /* Nonzero for -fpcc-struct-return: return values the same way PCC does. */
499 int flag_pcc_struct_return
= DEFAULT_PCC_STRUCT_RETURN
;
501 /* Nonzero for -fforce-mem: load memory value into a register
502 before arithmetic on it. This makes better cse but slower compilation. */
504 int flag_force_mem
= 0;
506 /* Nonzero for -fforce-addr: load memory address into a register before
507 reference to memory. This makes better cse but slower compilation. */
509 int flag_force_addr
= 0;
511 /* Nonzero for -fdefer-pop: don't pop args after each function call;
512 instead save them up to pop many calls' args with one insns. */
514 int flag_defer_pop
= 0;
516 /* Nonzero for -ffloat-store: don't allocate floats and doubles
517 in extended-precision registers. */
519 int flag_float_store
= 0;
521 /* Nonzero for -fcse-follow-jumps:
522 have cse follow jumps to do a more extensive job. */
524 int flag_cse_follow_jumps
;
526 /* Nonzero for -fcse-skip-blocks:
527 have cse follow a branch around a block. */
528 int flag_cse_skip_blocks
;
530 /* Nonzero for -fexpensive-optimizations:
531 perform miscellaneous relatively-expensive optimizations. */
532 int flag_expensive_optimizations
;
534 /* Nonzero for -fthread-jumps:
535 have jump optimize output of loop. */
537 int flag_thread_jumps
;
539 /* Nonzero enables strength-reduction in loop.c. */
541 int flag_strength_reduce
= 0;
543 /* Nonzero enables loop unrolling in unroll.c. Only loops for which the
544 number of iterations can be calculated at compile-time (UNROLL_COMPLETELY,
545 UNROLL_MODULO) or at run-time (preconditioned to be UNROLL_MODULO) are
548 int flag_unroll_loops
;
550 /* Nonzero enables loop unrolling in unroll.c. All loops are unrolled.
551 This is generally not a win. */
553 int flag_unroll_all_loops
;
555 /* Nonzero forces all invariant computations in loops to be moved
558 int flag_move_all_movables
= 0;
560 /* Nonzero forces all general induction variables in loops to be
563 int flag_reduce_all_givs
= 0;
565 /* Nonzero to perform full register move optimization passes. This is the
568 int flag_regmove
= 0;
570 /* Nonzero for -fwritable-strings:
571 store string constants in data segment and don't uniquize them. */
573 int flag_writable_strings
= 0;
575 /* Nonzero means don't put addresses of constant functions in registers.
576 Used for compiling the Unix kernel, where strange substitutions are
577 done on the assembly output. */
579 int flag_no_function_cse
= 0;
581 /* Nonzero for -fomit-frame-pointer:
582 don't make a frame pointer in simple functions that don't require one. */
584 int flag_omit_frame_pointer
= 0;
586 /* Nonzero means place each function into its own section on those platforms
587 which support arbitrary section names and unlimited numbers of sections. */
589 int flag_function_sections
= 0;
591 /* ... and similar for data. */
593 int flag_data_sections
= 0;
595 /* Nonzero to inhibit use of define_optimization peephole opts. */
597 int flag_no_peephole
= 0;
599 /* Nonzero allows GCC to violate some IEEE or ANSI rules regarding math
600 operations in the interest of optimization. For example it allows
601 GCC to assume arguments to sqrt are nonnegative numbers, allowing
602 faster code for sqrt to be generated. */
604 int flag_fast_math
= 0;
606 /* Nonzero allows GCC to optimize sibling and tail recursive calls. */
608 int flag_optimize_sibling_calls
= 0;
610 /* Nonzero means the front end generally wants `errno' maintained by math
611 operations, like built-in SQRT, unless overridden by flag_fast_math. */
613 int flag_errno_math
= 1;
615 /* 0 means straightforward implementation of complex divide acceptable.
616 1 means wide ranges of inputs must work for complex divide.
617 2 means C9X-like requirements for complex divide (not yet implemented). */
619 int flag_complex_divide_method
= 0;
621 /* Nonzero means all references through pointers are volatile. */
625 /* Nonzero means treat all global and extern variables as volatile. */
627 int flag_volatile_global
;
629 /* Nonzero means treat all static variables as volatile. */
631 int flag_volatile_static
;
633 /* Nonzero means just do syntax checking; don't output anything. */
635 int flag_syntax_only
= 0;
637 /* Nonzero means perform global cse. */
639 static int flag_gcse
;
641 /* Nonzero means to use global dataflow analysis to eliminate
642 useless null pointer tests. */
644 static int flag_delete_null_pointer_checks
;
646 /* Nonzero means to rerun cse after loop optimization. This increases
647 compilation time about 20% and picks up a few more common expressions. */
649 static int flag_rerun_cse_after_loop
;
651 /* Nonzero means to run loop optimizations twice. */
653 int flag_rerun_loop_opt
;
655 /* Nonzero for -finline-functions: ok to inline functions that look like
656 good inline candidates. */
658 int flag_inline_functions
;
660 /* Nonzero for -fkeep-inline-functions: even if we make a function
661 go inline everywhere, keep its definition around for debugging
664 int flag_keep_inline_functions
;
666 /* Nonzero means that functions will not be inlined. */
670 /* Nonzero means that we should emit static const variables
671 regardless of whether or not optimization is turned on. */
673 int flag_keep_static_consts
= 1;
675 /* Nonzero means we should be saving declaration info into a .X file. */
677 int flag_gen_aux_info
= 0;
679 /* Specified name of aux-info file. */
681 static char *aux_info_file_name
;
683 /* Nonzero means make the text shared if supported. */
685 int flag_shared_data
;
687 /* Nonzero means schedule into delayed branch slots if supported. */
689 int flag_delayed_branch
;
691 /* Nonzero if we are compiling pure (sharable) code.
692 Value is 1 if we are doing reasonable (i.e. simple
693 offset into offset table) pic. Value is 2 if we can
694 only perform register offsets. */
698 /* Nonzero means generate extra code for exception handling and enable
699 exception handling. */
703 /* Nonzero means use the new model for exception handling. Replaces
704 -DNEW_EH_MODEL as a compile option. */
706 int flag_new_exceptions
= 1;
708 /* Nonzero means generate frame unwind info table when supported. */
710 int flag_unwind_tables
= 0;
712 /* Nonzero means don't place uninitialized global data in common storage
717 /* Nonzero means pretend it is OK to examine bits of target floats,
718 even if that isn't true. The resulting code will have incorrect constants,
719 but the same series of instructions that the native compiler would make. */
721 int flag_pretend_float
;
723 /* Nonzero means change certain warnings into errors.
724 Usually these are warnings about failure to conform to some standard. */
726 int flag_pedantic_errors
= 0;
728 /* flag_schedule_insns means schedule insns within basic blocks (before
730 flag_schedule_insns_after_reload means schedule insns after
733 int flag_schedule_insns
= 0;
734 int flag_schedule_insns_after_reload
= 0;
736 /* The following flags have effect only for scheduling before register
739 flag_schedule_interblock means schedule insns accross basic blocks.
740 flag_schedule_speculative means allow speculative motion of non-load insns.
741 flag_schedule_speculative_load means allow speculative motion of some
743 flag_schedule_speculative_load_dangerous allows speculative motion of more
746 int flag_schedule_interblock
= 1;
747 int flag_schedule_speculative
= 1;
748 int flag_schedule_speculative_load
= 0;
749 int flag_schedule_speculative_load_dangerous
= 0;
751 int flag_single_precision_constant
;
753 /* flag_branch_on_count_reg means try to replace add-1,compare,branch tupple
754 by a cheaper branch on a count register. */
755 int flag_branch_on_count_reg
= 1;
757 /* -finhibit-size-directive inhibits output of .size for ELF.
758 This is used only for compiling crtstuff.c,
759 and it may be extended to other effects
760 needed for crtstuff.c on other systems. */
761 int flag_inhibit_size_directive
= 0;
763 /* -fverbose-asm causes extra commentary information to be produced in
764 the generated assembly code (to make it more readable). This option
765 is generally only of use to those who actually need to read the
766 generated assembly code (perhaps while debugging the compiler itself).
767 -fno-verbose-asm, the default, causes the extra information
768 to be omitted and is useful when comparing two assembler files. */
770 int flag_verbose_asm
= 0;
772 /* -dA causes debug commentary information to be produced in
773 the generated assembly code (to make it more readable). This option
774 is generally only of use to those who actually need to read the
775 generated assembly code (perhaps while debugging the compiler itself).
776 Currently, this switch is only used by dwarfout.c; however, it is intended
777 to be a catchall for printing debug information in the assembler file. */
779 int flag_debug_asm
= 0;
781 /* -fgnu-linker specifies use of the GNU linker for initializations.
782 (Or, more generally, a linker that handles initializations.)
783 -fno-gnu-linker says that collect2 will be used. */
785 int flag_gnu_linker
= 0;
787 int flag_gnu_linker
= 1;
793 /* Enable dead code elimination. */
796 /* Tag all structures with __attribute__(packed). */
797 int flag_pack_struct
= 0;
799 /* Emit code to check for stack overflow; also may cause large objects
800 to be allocated dynamically. */
801 int flag_stack_check
;
803 /* When non-NULL, indicates that whenever space is allocated on the
804 stack, the resulting stack pointer must not pass this
805 address---that is, for stacks that grow downward, the stack pointer
806 must always be greater than or equal to this address; for stacks
807 that grow upward, the stack pointer must be less than this address.
808 At present, the rtx may be either a REG or a SYMBOL_REF, although
809 the support provided depends on the backend. */
812 /* -fcheck-memory-usage causes extra code to be generated in order to check
813 memory accesses. This is used by a detector of bad memory accesses such
815 int flag_check_memory_usage
= 0;
817 /* -fprefix-function-name causes function name to be prefixed. This
818 can be used with -fcheck-memory-usage to isolate code compiled with
819 -fcheck-memory-usage. */
820 int flag_prefix_function_name
= 0;
822 /* 0 if pointer arguments may alias each other. True in C.
823 1 if pointer arguments may not alias each other but may alias
825 2 if pointer arguments may not alias each other and may not
826 alias global variables. True in Fortran.
827 This defaults to 0 for C. */
828 int flag_argument_noalias
= 0;
830 /* Nonzero if we should do (language-dependent) alias analysis.
831 Typically, this analysis will assume that expressions of certain
832 types do not alias expressions of certain other types. Only used
833 if alias analysis (in general) is enabled. */
834 int flag_strict_aliasing
= 0;
836 /* Instrument functions with calls at entry and exit, for profiling. */
837 int flag_instrument_function_entry_exit
= 0;
839 /* Nonzero means ignore `#ident' directives. 0 means handle them.
840 On SVR4 targets, it also controls whether or not to emit a
841 string identifying the compiler. */
843 int flag_no_ident
= 0;
845 /* This will perform a peephole pass before sched2. */
846 int flag_peephole2
= 0;
848 /* -fbounded-pointers causes gcc to compile pointers as composite
849 objects occupying three words: the pointer value, the base address
850 of the referent object, and the address immediately beyond the end
851 of the referent object. The base and extent allow us to perform
852 runtime bounds checking. -fbounded-pointers implies -fcheck-bounds. */
853 int flag_bounded_pointers
= 0;
855 /* -fcheck-bounds causes gcc to generate array bounds checks.
856 For C, C++: defaults to value of flag_bounded_pointers.
857 For ObjC: defaults to off.
858 For Java: defaults to on.
859 For Fortran: defaults to off.
860 For CHILL: defaults to off. */
861 int flag_bounds_check
= 0;
863 /* If one, renumber instruction UIDs to reduce the number of
864 unused UIDs if there are a lot of instructions. If greater than
865 one, unconditionally renumber instruction UIDs. */
866 int flag_renumber_insns
= 1;
868 /* Values of the -falign-* flags: how much to align labels in code.
869 0 means `use default', 1 means `don't align'.
870 For each variable, there is an _log variant which is the power
871 of two not less than the variable, for .align output. */
878 int align_labels_log
;
880 int align_functions_log
;
882 /* Table of supported debugging formats. */
886 /* Since PREFERRED_DEBUGGING_TYPE isn't necessarily a
887 constant expression, we use NO_DEBUG in its place. */
888 enum debug_info_type debug_type
;
889 int use_extensions_p
;
890 const char *description
;
894 { "", NO_DEBUG
, DEFAULT_GDB_EXTENSIONS
,
895 "Generate default debug format output" },
896 { "gdb", NO_DEBUG
, 1, "Generate default extended debug format output" },
897 #ifdef DBX_DEBUGGING_INFO
898 { "stabs", DBX_DEBUG
, 0, "Generate STABS format debug output" },
899 { "stabs+", DBX_DEBUG
, 1, "Generate extended STABS format debug output" },
901 #ifdef DWARF_DEBUGGING_INFO
902 { "dwarf", DWARF_DEBUG
, 0, "Generate DWARF-1 format debug output"},
903 { "dwarf+", DWARF_DEBUG
, 1,
904 "Generated extended DWARF-1 format debug output" },
906 #ifdef DWARF2_DEBUGGING_INFO
907 { "dwarf-2", DWARF2_DEBUG
, 0, "Enable DWARF-2 debug output" },
909 #ifdef XCOFF_DEBUGGING_INFO
910 { "xcoff", XCOFF_DEBUG
, 0, "Generate XCOFF format debug output" },
911 { "xcoff+", XCOFF_DEBUG
, 1, "Generate extended XCOFF format debug output" },
913 #ifdef SDB_DEBUGGING_INFO
914 { "coff", SDB_DEBUG
, 0, "Generate COFF format debug output" },
924 const char *description
;
926 lang_independent_options
;
928 /* Add or remove a leading underscore from user symbols. */
929 int flag_leading_underscore
= -1;
931 /* The user symbol prefix after having resolved same. */
932 const char *user_label_prefix
;
934 /* A default for same. */
935 #ifndef USER_LABEL_PREFIX
936 #define USER_LABEL_PREFIX ""
939 /* Table of language-independent -f options.
940 STRING is the option name. VARIABLE is the address of the variable.
941 ON_VALUE is the value to store in VARIABLE
942 if `-fSTRING' is seen as an option.
943 (If `-fno-STRING' is seen as an option, the opposite value is stored.) */
945 lang_independent_options f_options
[] =
947 {"float-store", &flag_float_store
, 1,
948 "Do not store floats in registers" },
949 {"volatile", &flag_volatile
, 1,
950 "Consider all mem refs through pointers as volatile"},
951 {"volatile-global", &flag_volatile_global
, 1,
952 "Consider all mem refs to global data to be volatile" },
953 {"volatile-static", &flag_volatile_static
, 1,
954 "Consider all mem refs to static data to be volatile" },
955 {"defer-pop", &flag_defer_pop
, 1,
956 "Defer popping functions args from stack until later" },
957 {"omit-frame-pointer", &flag_omit_frame_pointer
, 1,
958 "When possible do not generate stack frames"},
959 {"optimize-sibling-calls", &flag_optimize_sibling_calls
, 1,
960 "Optimize sibling and tail recursive calls" },
961 {"cse-follow-jumps", &flag_cse_follow_jumps
, 1,
962 "When running CSE, follow jumps to their targets" },
963 {"cse-skip-blocks", &flag_cse_skip_blocks
, 1,
964 "When running CSE, follow conditional jumps" },
965 {"expensive-optimizations", &flag_expensive_optimizations
, 1,
966 "Perform a number of minor, expensive optimisations" },
967 {"thread-jumps", &flag_thread_jumps
, 1,
968 "Perform jump threading optimisations"},
969 {"strength-reduce", &flag_strength_reduce
, 1,
970 "Perform strength reduction optimisations" },
971 {"unroll-loops", &flag_unroll_loops
, 1,
972 "Perform loop unrolling when iteration count is known" },
973 {"unroll-all-loops", &flag_unroll_all_loops
, 1,
974 "Perform loop unrolling for all loops" },
975 {"move-all-movables", &flag_move_all_movables
, 1,
976 "Force all loop invariant computations out of loops" },
977 {"reduce-all-givs", &flag_reduce_all_givs
, 1,
978 "Strength reduce all loop general induction variables" },
979 {"writable-strings", &flag_writable_strings
, 1,
980 "Store strings in writable data section" },
981 {"peephole", &flag_no_peephole
, 0,
982 "Enable machine specific peephole optimisations" },
983 {"force-mem", &flag_force_mem
, 1,
984 "Copy memory operands into registers before using" },
985 {"force-addr", &flag_force_addr
, 1,
986 "Copy memory address constants into regs before using" },
987 {"function-cse", &flag_no_function_cse
, 0,
988 "Allow function addresses to be held in registers" },
989 {"inline-functions", &flag_inline_functions
, 1,
990 "Integrate simple functions into their callers" },
991 {"keep-inline-functions", &flag_keep_inline_functions
, 1,
992 "Generate code for funcs even if they are fully inlined" },
993 {"inline", &flag_no_inline
, 0,
994 "Pay attention to the 'inline' keyword"},
995 {"keep-static-consts", &flag_keep_static_consts
, 1,
996 "Emit static const variables even if they are not used" },
997 {"syntax-only", &flag_syntax_only
, 1,
998 "Check for syntax errors, then stop" },
999 {"shared-data", &flag_shared_data
, 1,
1000 "Mark data as shared rather than private" },
1001 {"caller-saves", &flag_caller_saves
, 1,
1002 "Enable saving registers around function calls" },
1003 {"pcc-struct-return", &flag_pcc_struct_return
, 1,
1004 "Return 'short' aggregates in memory, not registers" },
1005 {"reg-struct-return", &flag_pcc_struct_return
, 0,
1006 "Return 'short' aggregates in registers" },
1007 {"delayed-branch", &flag_delayed_branch
, 1,
1008 "Attempt to fill delay slots of branch instructions" },
1009 {"gcse", &flag_gcse
, 1,
1010 "Perform the global common subexpression elimination" },
1011 {"rerun-cse-after-loop", &flag_rerun_cse_after_loop
, 1,
1012 "Run CSE pass after loop optimisations"},
1013 {"rerun-loop-opt", &flag_rerun_loop_opt
, 1,
1014 "Run the loop optimiser twice"},
1015 {"delete-null-pointer-checks", &flag_delete_null_pointer_checks
, 1,
1016 "Delete useless null pointer checks" },
1017 {"pretend-float", &flag_pretend_float
, 1,
1018 "Pretend that host and target use the same FP format"},
1019 {"schedule-insns", &flag_schedule_insns
, 1,
1020 "Reschedule instructions to avoid pipeline stalls"},
1021 {"schedule-insns2", &flag_schedule_insns_after_reload
, 1,
1022 "Run two passes of the instruction scheduler"},
1023 {"sched-interblock",&flag_schedule_interblock
, 1,
1024 "Enable scheduling across basic blocks" },
1025 {"sched-spec",&flag_schedule_speculative
, 1,
1026 "Allow speculative motion of non-loads" },
1027 {"sched-spec-load",&flag_schedule_speculative_load
, 1,
1028 "Allow speculative motion of some loads" },
1029 {"sched-spec-load-dangerous",&flag_schedule_speculative_load_dangerous
, 1,
1030 "Allow speculative motion of more loads" },
1031 {"branch-count-reg",&flag_branch_on_count_reg
, 1,
1032 "Replace add,compare,branch with branch on count reg"},
1033 {"pic", &flag_pic
, 1,
1034 "Generate position independent code, if possible"},
1035 {"PIC", &flag_pic
, 2, ""},
1036 {"exceptions", &flag_exceptions
, 1,
1037 "Enable exception handling" },
1038 {"new-exceptions", &flag_new_exceptions
, 1,
1039 "Use the new model for exception handling" },
1040 {"unwind-tables", &flag_unwind_tables
, 1,
1041 "Just generate unwind tables for exception handling" },
1042 {"sjlj-exceptions", &exceptions_via_longjmp
, 1,
1043 "Use setjmp/longjmp to handle exceptions" },
1044 {"asynchronous-exceptions", &asynchronous_exceptions
, 1,
1045 "Support asynchronous exceptions" },
1046 {"profile-arcs", &profile_arc_flag
, 1,
1047 "Insert arc based program profiling code" },
1048 {"test-coverage", &flag_test_coverage
, 1,
1049 "Create data files needed by gcov" },
1050 {"branch-probabilities", &flag_branch_probabilities
, 1,
1051 "Use profiling information for branch probabilities" },
1052 {"reorder-blocks", &flag_reorder_blocks
, 1,
1053 "Reorder basic blocks to improve code placement" },
1054 {"rename-registers", &flag_rename_registers
, 1,
1055 "Do the register renaming optimization pass"},
1056 {"fast-math", &flag_fast_math
, 1,
1057 "Improve FP speed by violating ANSI & IEEE rules" },
1058 {"common", &flag_no_common
, 0,
1059 "Do not put unitialised globals in the common section" },
1060 {"inhibit-size-directive", &flag_inhibit_size_directive
, 1,
1061 "Do not generate .size directives" },
1062 {"function-sections", &flag_function_sections
, 1,
1063 "place each function into its own section" },
1064 {"data-sections", &flag_data_sections
, 1,
1065 "place data items into their own section" },
1066 {"verbose-asm", &flag_verbose_asm
, 1,
1067 "Add extra commentry to assembler output"},
1068 {"gnu-linker", &flag_gnu_linker
, 1,
1069 "Output GNU ld formatted global initialisers"},
1070 {"regmove", &flag_regmove
, 1,
1071 "Enables a register move optimisation"},
1072 {"optimize-register-move", &flag_regmove
, 1,
1073 "Do the full regmove optimization pass"},
1074 {"pack-struct", &flag_pack_struct
, 1,
1075 "Pack structure members together without holes" },
1076 {"stack-check", &flag_stack_check
, 1,
1077 "Insert stack checking code into the program" },
1078 {"argument-alias", &flag_argument_noalias
, 0,
1079 "Specify that arguments may alias each other & globals"},
1080 {"argument-noalias", &flag_argument_noalias
, 1,
1081 "Assume arguments may alias globals but not each other"},
1082 {"argument-noalias-global", &flag_argument_noalias
, 2,
1083 "Assume arguments do not alias each other or globals" },
1084 {"strict-aliasing", &flag_strict_aliasing
, 1,
1085 "Assume strict aliasing rules apply" },
1086 {"align-loops", &align_loops
, 0,
1087 "Align the start of loops" },
1088 {"align-jumps", &align_jumps
, 0,
1089 "Align labels which are only reached by jumping" },
1090 {"align-labels", &align_labels
, 0,
1091 "Align all labels" },
1092 {"align-functions", &align_functions
, 0,
1093 "Align the start of functions" },
1094 {"check-memory-usage", &flag_check_memory_usage
, 1,
1095 "Generate code to check every memory access" },
1096 {"prefix-function-name", &flag_prefix_function_name
, 1,
1097 "Add a prefix to all function names" },
1098 {"dump-unnumbered", &flag_dump_unnumbered
, 1,
1099 "Suppress output of instruction numbers and line number notes in debugging dumps"},
1100 {"instrument-functions", &flag_instrument_function_entry_exit
, 1,
1101 "Instrument function entry/exit with profiling calls"},
1102 {"ssa", &flag_ssa
, 1,
1103 "Enable SSA optimizations" },
1104 {"dce", &flag_dce
, 1,
1105 "Enable dead code elimination" },
1106 {"leading-underscore", &flag_leading_underscore
, 1,
1107 "External symbols have a leading underscore" },
1108 {"ident", &flag_no_ident
, 0,
1109 "Process #ident directives"},
1110 { "peephole2", &flag_peephole2
, 1,
1111 "Enables an rtl peephole pass run before sched2" },
1112 {"math-errno", &flag_errno_math
, 1,
1113 "Set errno after built-in math functions"},
1114 {"bounded-pointers", &flag_bounded_pointers
, 1,
1115 "Compile pointers as triples: value, base & end" },
1116 {"bounds-check", &flag_bounds_check
, 1,
1117 "Generate code to check bounds before dereferencing pointers and arrays" },
1118 {"single-precision-constant", &flag_single_precision_constant
, 1,
1119 "Convert floating point constant to single precision constant"}
1122 #define NUM_ELEM(a) (sizeof (a) / sizeof ((a)[0]))
1124 /* Table of language-specific options. */
1126 static struct lang_opt
1129 const char *description
;
1131 documented_lang_options
[] =
1133 /* In order not to overload the --help output, the convention
1134 used here is to only describe those options which are not
1135 enabled by default. */
1137 { "-ansi", "Compile just for ISO C89" },
1138 { "-fallow-single-precision",
1139 "Do not promote floats to double if using -traditional" },
1140 { "-std= ", "Determine language standard"},
1142 { "-fsigned-bitfields", "" },
1143 { "-funsigned-bitfields","Make bitfields by unsigned by default" },
1144 { "-fno-signed-bitfields", "" },
1145 { "-fno-unsigned-bitfields","" },
1146 { "-fsigned-char", "Make 'char' be signed by default"},
1147 { "-funsigned-char", "Make 'char' be unsigned by default"},
1148 { "-fno-signed-char", "" },
1149 { "-fno-unsigned-char", "" },
1151 { "-ftraditional", "" },
1152 { "-traditional", "Attempt to support traditional K&R style C"},
1153 { "-fnotraditional", "" },
1154 { "-fno-traditional", "" },
1157 { "-fno-asm", "Do not recognise the 'asm' keyword" },
1158 { "-fbuiltin", "" },
1159 { "-fno-builtin", "Do not recognise any built in functions" },
1160 { "-fhosted", "Assume normal C execution environment" },
1161 { "-fno-hosted", "" },
1163 "Assume that standard libraries & main might not exist" },
1164 { "-fno-freestanding", "" },
1165 { "-fcond-mismatch", "Allow different types as args of ? operator"},
1166 { "-fno-cond-mismatch", "" },
1167 { "-fdollars-in-identifiers", "Allow the use of $ inside identifiers" },
1168 { "-fno-dollars-in-identifiers", "" },
1169 { "-fpreprocessed", "" },
1170 { "-fno-preprocessed", "" },
1171 { "-fshort-double", "Use the same size for double as for float" },
1172 { "-fno-short-double", "" },
1173 { "-fshort-enums", "Use the smallest fitting integer to hold enums"},
1174 { "-fno-short-enums", "" },
1175 { "-fshort-wchar", "Override the underlying type for wchar_t to `unsigned short'" },
1176 { "-fno-short-wchar", "" },
1178 { "-Wall", "Enable most warning messages" },
1179 { "-Wbad-function-cast",
1180 "Warn about casting functions to incompatible types" },
1181 { "-Wno-bad-function-cast", "" },
1182 { "-Wmissing-noreturn",
1183 "Warn about functions which might be candidates for attribute noreturn" },
1184 { "-Wno-missing-noreturn", "" },
1185 { "-Wcast-qual", "Warn about casts which discard qualifiers"},
1186 { "-Wno-cast-qual", "" },
1187 { "-Wchar-subscripts", "Warn about subscripts whose type is 'char'"},
1188 { "-Wno-char-subscripts", "" },
1189 { "-Wcomment", "Warn if nested comments are detected" },
1190 { "-Wno-comment", "" },
1191 { "-Wcomments", "Warn if nested comments are detected" },
1192 { "-Wno-comments", "" },
1193 { "-Wconversion", "Warn about possibly confusing type conversions" },
1194 { "-Wno-conversion", "" },
1195 { "-Wformat", "Warn about printf format anomalies" },
1196 { "-Wno-format", "" },
1197 { "-Wimplicit-function-declaration",
1198 "Warn about implicit function declarations" },
1199 { "-Wno-implicit-function-declaration", "" },
1200 { "-Werror-implicit-function-declaration", "" },
1201 { "-Wimplicit-int", "Warn when a declaration does not specify a type" },
1202 { "-Wno-implicit-int", "" },
1203 { "-Wimplicit", "" },
1204 { "-Wno-implicit", "" },
1205 { "-Wimport", "Warn about the use of the #import directive" },
1206 { "-Wno-import", "" },
1207 { "-Wlong-long","" },
1208 { "-Wno-long-long", "Do not warn about using 'long long' when -pedantic" },
1209 { "-Wmain", "Warn about suspicious declarations of main" },
1210 { "-Wno-main", "" },
1211 { "-Wmissing-braces",
1212 "Warn about possibly missing braces around initialisers" },
1213 { "-Wno-missing-braces", "" },
1214 { "-Wmissing-declarations",
1215 "Warn about global funcs without previous declarations"},
1216 { "-Wno-missing-declarations", "" },
1217 { "-Wmissing-prototypes", "Warn about global funcs without prototypes" },
1218 { "-Wno-missing-prototypes", "" },
1219 { "-Wmultichar", "Warn about use of multicharacter literals"},
1220 { "-Wno-multichar", "" },
1221 { "-Wnested-externs", "Warn about externs not at file scope level" },
1222 { "-Wno-nested-externs", "" },
1223 { "-Wparentheses", "Warn about possible missing parentheses" },
1224 { "-Wno-parentheses", "" },
1225 { "-Wpointer-arith", "Warn about function pointer arithmetic" },
1226 { "-Wno-pointer-arith", "" },
1227 { "-Wredundant-decls",
1228 "Warn about multiple declarations of the same object" },
1229 { "-Wno-redundant-decls", "" },
1230 { "-Wsign-compare", "Warn about signed/unsigned comparisons" },
1231 { "-Wno-sign-compare", "" },
1232 { "-Wfloat-equal", "Warn about testing equality of floating point numbers" },
1233 { "-Wno-float-equal", "" },
1234 { "-Wunknown-pragmas", "Warn about unrecognized pragmas" },
1235 { "-Wno-unknown-pragmas", "" },
1236 { "-Wstrict-prototypes", "Warn about non-prototyped function decls" },
1237 { "-Wno-strict-prototypes", "" },
1238 { "-Wtraditional", "Warn about constructs whose meaning change in ISO C"},
1239 { "-Wno-traditional", "" },
1240 { "-Wtrigraphs", "Warn when trigraphs are encountered" },
1241 { "-Wno-trigraphs", "" },
1243 { "-Wno-undef", "" },
1244 { "-Wwrite-strings", "Mark strings as 'const char *'"},
1245 { "-Wno-write-strings", "" },
1247 #define DEFINE_LANG_NAME(NAME) { NULL, NAME },
1249 #include "options.h"
1253 /* Here is a table, controlled by the tm.h file, listing each -m switch
1254 and which bits in `target_switches' it should set or clear.
1255 If VALUE is positive, it is bits to set.
1256 If VALUE is negative, -VALUE is bits to clear.
1257 (The sign bit is not used so there is no confusion.) */
1263 const char *description
;
1265 target_switches
[] = TARGET_SWITCHES
;
1267 /* This table is similar, but allows the switch to have a value. */
1269 #ifdef TARGET_OPTIONS
1273 const char **variable
;
1274 const char *description
;
1276 target_options
[] = TARGET_OPTIONS
;
1279 /* Options controlling warnings. */
1281 /* Don't print warning messages. -w. */
1283 int inhibit_warnings
= 0;
1285 /* Print various extra warnings. -W. */
1287 int extra_warnings
= 0;
1289 /* Treat warnings as errors. -Werror. */
1291 int warnings_are_errors
= 0;
1293 /* Nonzero to warn about unused variables, functions et.al. */
1295 int warn_unused_function
;
1296 int warn_unused_label
;
1297 int warn_unused_parameter
;
1298 int warn_unused_variable
;
1299 int warn_unused_value
;
1302 set_Wunused (setting
)
1305 warn_unused_function
= setting
;
1306 warn_unused_label
= setting
;
1307 /* Unused function parameter warnings are reported when either ``-W
1308 -Wunused'' or ``-Wunused-parameter'' is specified. Differentiate
1309 -Wunused by setting WARN_UNUSED_PARAMETER to -1. */
1311 warn_unused_parameter
= 0;
1312 else if (!warn_unused_parameter
)
1313 warn_unused_parameter
= -1;
1314 warn_unused_variable
= setting
;
1315 warn_unused_value
= setting
;
1318 /* Nonzero to warn about code which is never reached. */
1320 int warn_notreached
;
1322 /* Nonzero to warn about variables used before they are initialized. */
1324 int warn_uninitialized
;
1326 /* Nonzero means warn about all declarations which shadow others. */
1330 /* Warn if a switch on an enum fails to have a case for every enum value. */
1334 /* Nonzero means warn about function definitions that default the return type
1335 or that use a null return and have a return-type other than void. */
1337 int warn_return_type
;
1339 /* Nonzero means warn about pointer casts that increase the required
1340 alignment of the target type (and might therefore lead to a crash
1341 due to a misaligned access). */
1343 int warn_cast_align
;
1345 /* Nonzero means warn about any identifiers that match in the first N
1346 characters. The value N is in `id_clash_len'. */
1351 /* Nonzero means warn about any objects definitions whose size is larger
1352 than N bytes. Also want about function definitions whose returned
1353 values are larger than N bytes. The value N is in `larger_than_size'. */
1355 int warn_larger_than
;
1356 HOST_WIDE_INT larger_than_size
;
1358 /* Nonzero means warn if inline function is too large. */
1362 /* Warn if a function returns an aggregate,
1363 since there are often incompatible calling conventions for doing this. */
1365 int warn_aggregate_return
;
1367 /* Warn if packed attribute on struct is unnecessary and inefficient. */
1371 /* Warn when gcc pads a structure to an alignment boundary. */
1375 /* Likewise for -W. */
1377 lang_independent_options W_options
[] =
1379 {"unused-function", &warn_unused_function
, 1, "Warn when a function is unused" },
1380 {"unused-label", &warn_unused_label
, 1, "Warn when a label is unused" },
1381 {"unused-parameter", &warn_unused_parameter
, 1, "Warn when a function parameter is unused" },
1382 {"unused-variable", &warn_unused_variable
, 1, "Warn when a variable is unused" },
1383 {"unused-value", &warn_unused_value
, 1, "Warn when an expression value is unused" },
1384 {"error", &warnings_are_errors
, 1, ""},
1385 {"shadow", &warn_shadow
, 1, "Warn when one local variable shadows another" },
1386 {"switch", &warn_switch
, 1,
1387 "Warn about enumerated switches missing a specific case" },
1388 {"aggregate-return", &warn_aggregate_return
, 1,
1389 "Warn about returning structures, unions or arrays" },
1390 {"cast-align", &warn_cast_align
, 1,
1391 "Warn about pointer casts which increase alignment" },
1392 {"unreachable-code", &warn_notreached
, 1,
1393 "Warn about code that will never be executed" },
1394 {"uninitialized", &warn_uninitialized
, 1,
1395 "Warn about unitialized automatic variables"},
1396 {"inline", &warn_inline
, 1,
1397 "Warn when an inlined function cannot be inlined"},
1398 {"packed", &warn_packed
, 1,
1399 "Warn when the packed attribute has no effect on struct layout"},
1400 {"padded", &warn_padded
, 1,
1401 "Warn when padding is required to align struct members"}
1404 /* Output files for assembler code (real compiler output)
1405 and debugging dumps. */
1408 FILE *aux_info_file
;
1409 FILE *rtl_dump_file
= NULL
;
1411 /* Decode the string P as an integral parameter.
1412 If the string is indeed an integer return its numeric value else
1413 issue an Invalid Option error for the option PNAME and return DEFVAL.
1414 If PNAME is zero just return DEFVAL, do not call error. */
1417 read_integral_parameter (p
, pname
, defval
)
1422 const char *endp
= p
;
1426 if (*endp
>= '0' && *endp
<= '9')
1435 error ("Invalid option `%s'", pname
);
1443 /* This is the default decl_printable_name function. */
1446 decl_name (decl
, verbosity
)
1448 int verbosity ATTRIBUTE_UNUSED
;
1450 return IDENTIFIER_POINTER (DECL_NAME (decl
));
1453 /* Mark P for GC. Also mark main_input_filename and input_filename. */
1459 struct file_stack
*stack
= *(struct file_stack
**)p
;
1461 /* We're only called for input_file_stack, so we can mark the current
1462 input_filename here as well. */
1463 ggc_mark_string (main_input_filename
);
1464 ggc_mark_string (input_filename
);
1468 ggc_mark_string (stack
->name
);
1469 stack
= stack
->next
;
1474 /* This calls abort and is used to avoid problems when abort if a macro.
1475 It is used when we need to pass the address of abort. */
1483 /* When `malloc.c' is compiled with `rcheck' defined,
1484 it calls this function to report clobberage. */
1488 const char *s ATTRIBUTE_UNUSED
;
1493 /* Return the logarithm of X, base 2, considering X unsigned,
1494 if X is a power of 2. Otherwise, returns -1.
1496 This should be used via the `exact_log2' macro. */
1500 register unsigned HOST_WIDE_INT x
;
1502 register int log
= 0;
1503 /* Test for 0 or a power of 2. */
1504 if (x
== 0 || x
!= (x
& -x
))
1506 while ((x
>>= 1) != 0)
1511 /* Given X, an unsigned number, return the largest int Y such that 2**Y <= X.
1512 If X is 0, return -1.
1514 This should be used via the floor_log2 macro. */
1518 register unsigned HOST_WIDE_INT x
;
1520 register int log
= -1;
1527 static int float_handler_set
;
1529 jmp_buf float_handler
;
1531 /* Signals actually come here. */
1534 float_signal (signo
)
1535 /* If this is missing, some compilers complain. */
1536 int signo ATTRIBUTE_UNUSED
;
1538 if (float_handled
== 0)
1539 crash_signal (signo
);
1540 #if defined (USG) || defined (hpux)
1541 /* Re-enable the signal catcher. */
1542 signal (SIGFPE
, float_signal
);
1545 signal (SIGFPE
, float_signal
);
1546 longjmp (float_handler
, 1);
1549 /* Specify where to longjmp to when a floating arithmetic error happens.
1550 If HANDLER is 0, it means don't handle the errors any more. */
1553 set_float_handler (handler
)
1556 float_handled
= (handler
!= 0);
1558 bcopy ((char *) handler
, (char *) float_handler
, sizeof (float_handler
));
1560 if (float_handled
&& ! float_handler_set
)
1562 signal (SIGFPE
, float_signal
);
1563 float_handler_set
= 1;
1567 /* This is a wrapper function for code which might elicit an
1568 arithmetic exception. That code should be passed in as a function
1569 pointer FN, and one argument DATA. DATA is usually a struct which
1570 contains the real input and output for function FN. This function
1571 returns 0 (failure) if longjmp was called (i.e. an exception
1572 occured.) It returns 1 (success) otherwise. */
1575 do_float_handler (fn
, data
)
1576 void (*fn
) PARAMS ((PTR
));
1583 /* We got here via longjmp () caused by an exception in function
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 fatal signals, such as SIGSEGV. These are transformed
1628 into ICE messages, which is much more user friendly. */
1631 crash_signal (signo
)
1632 /* If this is missing, some compilers complain. */
1635 fatal ("Internal error: %s.\n\
1636 Please submit a full bug report.\n\
1637 See %s for instructions.", strsignal (signo
), GCCBUGURL
);
1640 /* Strip off a legitimate source ending from the input string NAME of
1641 length LEN. Rather than having to know the names used by all of
1642 our front ends, we strip off an ending of a period followed by
1643 up to five characters. (Java uses ".class".) */
1646 strip_off_ending (name
, len
)
1651 for (i
= 2; i
< 6 && len
> i
; i
++)
1653 if (name
[len
- i
] == '.')
1655 name
[len
- i
] = '\0';
1661 /* Output a quoted string. */
1664 output_quoted_string (asm_file
, string
)
1668 #ifdef OUTPUT_QUOTED_STRING
1669 OUTPUT_QUOTED_STRING (asm_file
, string
);
1673 putc ('\"', asm_file
);
1674 while ((c
= *string
++) != 0)
1676 if (c
== '\"' || c
== '\\')
1677 putc ('\\', asm_file
);
1680 putc ('\"', asm_file
);
1684 /* Output a file name in the form wanted by System V. */
1687 output_file_directive (asm_file
, input_name
)
1689 const char *input_name
;
1691 int len
= strlen (input_name
);
1692 const char *na
= input_name
+ len
;
1694 /* NA gets INPUT_NAME sans directory names. */
1695 while (na
> input_name
)
1697 if (IS_DIR_SEPARATOR (na
[-1]))
1702 #ifdef ASM_OUTPUT_MAIN_SOURCE_FILENAME
1703 ASM_OUTPUT_MAIN_SOURCE_FILENAME (asm_file
, na
);
1705 #ifdef ASM_OUTPUT_SOURCE_FILENAME
1706 ASM_OUTPUT_SOURCE_FILENAME (asm_file
, na
);
1708 fprintf (asm_file
, "\t.file\t");
1709 output_quoted_string (asm_file
, na
);
1710 fputc ('\n', asm_file
);
1715 #ifdef ASM_IDENTIFY_LANGUAGE
1716 /* Routine to build language identifier for object file. */
1719 output_lang_identify (asm_out_file
)
1722 int len
= strlen (lang_identify ()) + sizeof ("__gnu_compiled_") + 1;
1723 char *s
= (char *) alloca (len
);
1725 sprintf (s
, "__gnu_compiled_%s", lang_identify ());
1726 ASM_OUTPUT_LABEL (asm_out_file
, s
);
1730 /* Routine to open a dump file. Return true if the dump file is enabled. */
1733 open_dump_file (index
, decl
)
1734 enum dump_file_index index
;
1738 const char *open_arg
;
1741 if (! dump_file
[index
].enabled
)
1744 timevar_push (TV_DUMP
);
1745 if (rtl_dump_file
!= NULL
)
1746 fclose (rtl_dump_file
);
1748 sprintf (seq
, ".%02d.", index
);
1750 if (! dump_file
[index
].initialized
)
1752 /* If we've not initialized the files, do so now. */
1753 if (graph_dump_format
!= no_graph
1754 && dump_file
[index
].graph_dump_p
)
1756 dump_name
= concat (seq
, dump_file
[index
].extension
, NULL
);
1757 clean_graph_dump_file (dump_base_name
, dump_name
);
1760 dump_file
[index
].initialized
= 1;
1766 dump_name
= concat (dump_base_name
, seq
,
1767 dump_file
[index
].extension
, NULL
);
1769 rtl_dump_file
= fopen (dump_name
, open_arg
);
1770 if (rtl_dump_file
== NULL
)
1771 pfatal_with_name (dump_name
);
1776 fprintf (rtl_dump_file
, "\n;; Function %s\n\n",
1777 decl_printable_name (decl
, 2));
1779 timevar_pop (TV_DUMP
);
1783 /* Routine to close a dump file. */
1786 close_dump_file (index
, func
, insns
)
1787 enum dump_file_index index
;
1788 void (*func
) PARAMS ((FILE *, rtx
));
1791 if (! rtl_dump_file
)
1794 timevar_push (TV_DUMP
);
1796 && graph_dump_format
!= no_graph
1797 && dump_file
[index
].graph_dump_p
)
1802 sprintf (seq
, ".%02d.", index
);
1803 suffix
= concat (seq
, dump_file
[index
].extension
, NULL
);
1804 print_rtl_graph_with_bb (dump_base_name
, suffix
, insns
);
1809 func (rtl_dump_file
, insns
);
1811 fflush (rtl_dump_file
);
1812 fclose (rtl_dump_file
);
1814 rtl_dump_file
= NULL
;
1815 timevar_pop (TV_DUMP
);
1818 /* Do any final processing required for the declarations in VEC, of
1819 which there are LEN. We write out inline functions and variables
1820 that have been deferred until this point, but which are required.
1821 Returns non-zero if anything was put out. */
1824 wrapup_global_declarations (vec
, len
)
1831 int output_something
= 0;
1833 for (i
= 0; i
< len
; i
++)
1837 /* We're not deferring this any longer. */
1838 DECL_DEFER_OUTPUT (decl
) = 0;
1840 if (TREE_CODE (decl
) == VAR_DECL
&& DECL_SIZE (decl
) == 0
1841 && incomplete_decl_finalize_hook
!= 0)
1842 (*incomplete_decl_finalize_hook
) (decl
);
1845 /* Now emit any global variables or functions that we have been
1846 putting off. We need to loop in case one of the things emitted
1847 here references another one which comes earlier in the list. */
1851 for (i
= 0; i
< len
; i
++)
1855 if (TREE_ASM_WRITTEN (decl
) || DECL_EXTERNAL (decl
))
1858 /* Don't write out static consts, unless we still need them.
1860 We also keep static consts if not optimizing (for debugging),
1861 unless the user specified -fno-keep-static-consts.
1862 ??? They might be better written into the debug information.
1863 This is possible when using DWARF.
1865 A language processor that wants static constants to be always
1866 written out (even if it is not used) is responsible for
1867 calling rest_of_decl_compilation itself. E.g. the C front-end
1868 calls rest_of_decl_compilation from finish_decl.
1869 One motivation for this is that is conventional in some
1870 environments to write things like:
1871 static const char rcsid[] = "... version string ...";
1872 intending to force the string to be in the executable.
1874 A language processor that would prefer to have unneeded
1875 static constants "optimized away" would just defer writing
1876 them out until here. E.g. C++ does this, because static
1877 constants are often defined in header files.
1879 ??? A tempting alternative (for both C and C++) would be
1880 to force a constant to be written if and only if it is
1881 defined in a main file, as opposed to an include file. */
1883 if (TREE_CODE (decl
) == VAR_DECL
&& TREE_STATIC (decl
)
1884 && (! TREE_READONLY (decl
)
1885 || TREE_PUBLIC (decl
)
1886 || (!optimize
&& flag_keep_static_consts
)
1887 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl
))))
1890 rest_of_decl_compilation (decl
, NULL_PTR
, 1, 1);
1893 if (TREE_CODE (decl
) == FUNCTION_DECL
1894 && DECL_INITIAL (decl
) != 0
1895 && DECL_SAVED_INSNS (decl
) != 0
1896 && (flag_keep_inline_functions
1897 || (TREE_PUBLIC (decl
) && !DECL_COMDAT (decl
))
1898 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl
))))
1901 temporary_allocation ();
1902 output_inline_function (decl
);
1903 permanent_allocation (1);
1908 output_something
= 1;
1912 return output_something
;
1915 /* Issue appropriate warnings for the global declarations in VEC (of
1916 which there are LEN). Output debugging information for them. */
1919 check_global_declarations (vec
, len
)
1926 for (i
= 0; i
< len
; i
++)
1930 if (TREE_CODE (decl
) == VAR_DECL
&& TREE_STATIC (decl
)
1931 && ! TREE_ASM_WRITTEN (decl
))
1932 /* Cancel the RTL for this decl so that, if debugging info
1933 output for global variables is still to come,
1934 this one will be omitted. */
1935 DECL_RTL (decl
) = NULL
;
1937 /* Warn about any function
1938 declared static but not defined.
1939 We don't warn about variables,
1940 because many programs have static variables
1941 that exist only to get some text into the object file. */
1942 if (TREE_CODE (decl
) == FUNCTION_DECL
1943 && (warn_unused_function
1944 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl
)))
1945 && DECL_INITIAL (decl
) == 0
1946 && DECL_EXTERNAL (decl
)
1947 && ! DECL_ARTIFICIAL (decl
)
1948 && ! TREE_PUBLIC (decl
))
1950 if (TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl
)))
1951 pedwarn_with_decl (decl
,
1952 "`%s' used but never defined");
1954 warning_with_decl (decl
,
1955 "`%s' declared `static' but never defined");
1956 /* This symbol is effectively an "extern" declaration now. */
1957 TREE_PUBLIC (decl
) = 1;
1958 assemble_external (decl
);
1961 /* Warn about static fns or vars defined but not used,
1962 but not about inline functions or static consts
1963 since defining those in header files is normal practice. */
1964 if (((warn_unused_function
1965 && TREE_CODE (decl
) == FUNCTION_DECL
&& ! DECL_INLINE (decl
))
1966 || (warn_unused_variable
1967 && TREE_CODE (decl
) == VAR_DECL
&& ! TREE_READONLY (decl
)))
1968 && ! DECL_IN_SYSTEM_HEADER (decl
)
1969 && ! DECL_EXTERNAL (decl
)
1970 && ! TREE_PUBLIC (decl
)
1971 && ! TREE_USED (decl
)
1972 && (TREE_CODE (decl
) == FUNCTION_DECL
|| ! DECL_REGISTER (decl
))
1973 /* The TREE_USED bit for file-scope decls
1974 is kept in the identifier, to handle multiple
1975 external decls in different scopes. */
1976 && ! TREE_USED (DECL_NAME (decl
)))
1977 warning_with_decl (decl
, "`%s' defined but not used");
1979 timevar_push (TV_SYMOUT
);
1980 #ifdef SDB_DEBUGGING_INFO
1981 /* The COFF linker can move initialized global vars to the end.
1982 And that can screw up the symbol ordering.
1983 By putting the symbols in that order to begin with,
1984 we avoid a problem. mcsun!unido!fauern!tumuc!pes@uunet.uu.net. */
1985 if (write_symbols
== SDB_DEBUG
&& TREE_CODE (decl
) == VAR_DECL
1986 && TREE_PUBLIC (decl
) && DECL_INITIAL (decl
)
1987 && ! DECL_EXTERNAL (decl
)
1988 && DECL_RTL (decl
) != 0)
1989 sdbout_symbol (decl
, 0);
1991 /* Output COFF information for non-global
1992 file-scope initialized variables. */
1993 if (write_symbols
== SDB_DEBUG
1994 && TREE_CODE (decl
) == VAR_DECL
1995 && DECL_INITIAL (decl
)
1996 && ! DECL_EXTERNAL (decl
)
1997 && DECL_RTL (decl
) != 0
1998 && GET_CODE (DECL_RTL (decl
)) == MEM
)
1999 sdbout_toplevel_data (decl
);
2000 #endif /* SDB_DEBUGGING_INFO */
2001 #ifdef DWARF_DEBUGGING_INFO
2002 /* Output DWARF information for file-scope tentative data object
2003 declarations, file-scope (extern) function declarations (which
2004 had no corresponding body) and file-scope tagged type declarations
2005 and definitions which have not yet been forced out. */
2007 if (write_symbols
== DWARF_DEBUG
2008 && (TREE_CODE (decl
) != FUNCTION_DECL
|| !DECL_INITIAL (decl
)))
2009 dwarfout_file_scope_decl (decl
, 1);
2011 #ifdef DWARF2_DEBUGGING_INFO
2012 /* Output DWARF2 information for file-scope tentative data object
2013 declarations, file-scope (extern) function declarations (which
2014 had no corresponding body) and file-scope tagged type declarations
2015 and definitions which have not yet been forced out. */
2017 if (write_symbols
== DWARF2_DEBUG
2018 && (TREE_CODE (decl
) != FUNCTION_DECL
|| !DECL_INITIAL (decl
)))
2019 dwarf2out_decl (decl
);
2021 timevar_pop (TV_SYMOUT
);
2025 /* Save the current INPUT_FILENAME and LINENO on the top entry in the
2026 INPUT_FILE_STACK. Push a new entry for FILE and LINE, and set the
2027 INPUT_FILENAME and LINENO accordingly. */
2030 push_srcloc (file
, line
)
2034 struct file_stack
*fs
;
2036 if (input_file_stack
)
2038 input_file_stack
->name
= input_filename
;
2039 input_file_stack
->line
= lineno
;
2042 fs
= (struct file_stack
*) xmalloc (sizeof (struct file_stack
));
2043 fs
->name
= input_filename
= file
;
2044 fs
->line
= lineno
= line
;
2045 fs
->indent_level
= 0;
2046 fs
->next
= input_file_stack
;
2047 input_file_stack
= fs
;
2048 input_file_stack_tick
++;
2051 /* Pop the top entry off the stack of presently open source files.
2052 Restore the INPUT_FILENAME and LINENO from the new topmost entry on
2058 struct file_stack
*fs
;
2060 fs
= input_file_stack
;
2061 input_file_stack
= fs
->next
;
2063 input_file_stack_tick
++;
2064 /* The initial souce file is never popped. */
2065 if (!input_file_stack
)
2067 input_filename
= input_file_stack
->name
;
2068 lineno
= input_file_stack
->line
;
2071 /* Compile an entire file of output from cpp, named NAME.
2072 Write a file of assembly output and various debugging dumps. */
2080 int name_specified
= name
!= 0;
2082 if (dump_base_name
== 0)
2083 dump_base_name
= name
? name
: "gccdump";
2085 /* Start timing total execution time. */
2088 timevar_start (TV_TOTAL
);
2090 /* Initialize data in various passes. */
2094 name
= init_parse (name
);
2095 init_emit_once (debug_info_level
== DINFO_LEVEL_NORMAL
2096 || debug_info_level
== DINFO_LEVEL_VERBOSE
2097 || flag_test_coverage
2098 || warn_notreached
);
2101 init_decl_processing ();
2107 init_function_once ();
2108 init_stor_layout_once ();
2109 init_varasm_once ();
2111 /* The following initialization functions need to generate rtl, so
2112 provide a dummy function context for them. */
2113 init_dummy_function_start ();
2116 if (flag_caller_saves
)
2117 init_caller_save ();
2118 expand_dummy_function_end ();
2120 /* If auxiliary info generation is desired, open the output file.
2121 This goes in the same directory as the source file--unlike
2122 all the other output files. */
2123 if (flag_gen_aux_info
)
2125 aux_info_file
= fopen (aux_info_file_name
, "w");
2126 if (aux_info_file
== 0)
2127 pfatal_with_name (aux_info_file_name
);
2130 /* Open assembler code output file. Do this even if -fsyntax-only is on,
2131 because then the driver will have provided the name of a temporary
2132 file or bit bucket for us. */
2134 if (! name_specified
&& asm_file_name
== 0)
2135 asm_out_file
= stdout
;
2138 if (asm_file_name
== 0)
2140 int len
= strlen (dump_base_name
);
2141 char *dumpname
= (char *) xmalloc (len
+ 6);
2142 memcpy (dumpname
, dump_base_name
, len
+ 1);
2143 strip_off_ending (dumpname
, len
);
2144 strcat (dumpname
, ".s");
2145 asm_file_name
= dumpname
;
2147 if (!strcmp (asm_file_name
, "-"))
2148 asm_out_file
= stdout
;
2150 asm_out_file
= fopen (asm_file_name
, "w");
2151 if (asm_out_file
== 0)
2152 pfatal_with_name (asm_file_name
);
2155 #ifdef IO_BUFFER_SIZE
2156 setvbuf (asm_out_file
, (char *) xmalloc (IO_BUFFER_SIZE
),
2157 _IOFBF
, IO_BUFFER_SIZE
);
2160 if (ggc_p
&& name
!= 0)
2161 name
= ggc_alloc_string (name
, strlen (name
));
2163 input_filename
= name
;
2165 /* Put an entry on the input file stack for the main input file. */
2166 push_srcloc (input_filename
, 0);
2168 /* Perform language-specific initialization.
2169 This may set main_input_filename. */
2172 /* If the input doesn't start with a #line, use the input name
2173 as the official input file name. */
2174 if (main_input_filename
== 0)
2175 main_input_filename
= name
;
2177 if (flag_syntax_only
)
2179 write_symbols
= NO_DEBUG
;
2181 profile_block_flag
= 0;
2185 ASM_FILE_START (asm_out_file
);
2187 #ifdef ASM_COMMENT_START
2188 if (flag_verbose_asm
)
2190 /* Print the list of options in effect. */
2191 print_version (asm_out_file
, ASM_COMMENT_START
);
2192 print_switch_values (asm_out_file
, 0, MAX_LINE
,
2193 ASM_COMMENT_START
, " ", "\n");
2194 /* Add a blank line here so it appears in assembler output but not
2196 fprintf (asm_out_file
, "\n");
2200 /* Output something to inform GDB that this compilation was by GCC. */
2201 #ifndef ASM_IDENTIFY_GCC
2202 fprintf (asm_out_file
, "gcc2_compiled.:\n");
2204 ASM_IDENTIFY_GCC (asm_out_file
);
2207 /* Output something to identify which front-end produced this file. */
2208 #ifdef ASM_IDENTIFY_LANGUAGE
2209 ASM_IDENTIFY_LANGUAGE (asm_out_file
);
2211 } /* ! flag_syntax_only */
2213 #ifndef ASM_OUTPUT_SECTION_NAME
2214 if (flag_function_sections
)
2216 warning ("-ffunction-sections not supported for this target.");
2217 flag_function_sections
= 0;
2219 if (flag_data_sections
)
2221 warning ("-fdata-sections not supported for this target.");
2222 flag_data_sections
= 0;
2226 if (flag_function_sections
2227 && (profile_flag
|| profile_block_flag
))
2229 warning ("-ffunction-sections disabled; it makes profiling impossible.");
2230 flag_function_sections
= 0;
2233 #ifndef OBJECT_FORMAT_ELF
2234 if (flag_function_sections
&& write_symbols
!= NO_DEBUG
)
2235 warning ("-ffunction-sections may affect debugging on some targets.");
2238 /* ??? Note: There used to be a conditional here
2239 to call assemble_zeros without fail if DBX_DEBUGGING_INFO is defined.
2240 This was to guarantee separation between gcc_compiled. and
2241 the first function, for the sake of dbx on Suns.
2242 However, having the extra zero here confused the Emacs
2243 code for unexec, and might confuse other programs too.
2244 Therefore, I took out that change.
2245 In future versions we should find another way to solve
2246 that dbx problem. -- rms, 23 May 93. */
2248 /* Don't let the first function fall at the same address
2249 as gcc_compiled., if profiling. */
2250 if (profile_flag
|| profile_block_flag
)
2252 /* It's best if we can write a nop here since some
2253 assemblers don't tolerate zeros in the text section. */
2254 output_asm_insn (get_insn_template (CODE_FOR_nop
, NULL
), NULL_PTR
);
2257 /* If dbx symbol table desired, initialize writing it
2258 and output the predefined types. */
2259 timevar_push (TV_SYMOUT
);
2260 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
2261 if (write_symbols
== DBX_DEBUG
|| write_symbols
== XCOFF_DEBUG
)
2262 dbxout_init (asm_out_file
, main_input_filename
, getdecls ());
2264 #ifdef SDB_DEBUGGING_INFO
2265 if (write_symbols
== SDB_DEBUG
)
2266 sdbout_init (asm_out_file
, main_input_filename
, getdecls ());
2268 #ifdef DWARF_DEBUGGING_INFO
2269 if (write_symbols
== DWARF_DEBUG
)
2270 dwarfout_init (asm_out_file
, main_input_filename
);
2272 #ifdef DWARF2_UNWIND_INFO
2273 if (dwarf2out_do_frame ())
2274 dwarf2out_frame_init ();
2276 #ifdef DWARF2_DEBUGGING_INFO
2277 if (write_symbols
== DWARF2_DEBUG
)
2278 dwarf2out_init (asm_out_file
, main_input_filename
);
2280 timevar_pop (TV_SYMOUT
);
2282 /* Initialize yet another pass. */
2284 init_final (main_input_filename
);
2285 init_branch_prob (dump_base_name
);
2287 timevar_push (TV_PARSE
);
2289 /* Call the parser, which parses the entire file
2290 (calling rest_of_compilation for each function). */
2292 if (yyparse () != 0)
2294 if (errorcount
== 0)
2295 fnotice (stderr
, "Errors detected in input file (your bison.simple is out of date)\n");
2297 /* In case there were missing closebraces,
2298 get us back to the global binding level. */
2299 while (! global_bindings_p ())
2303 /* Compilation is now finished except for writing
2304 what's left of the symbol table output. */
2306 timevar_pop (TV_PARSE
);
2308 if (flag_syntax_only
)
2311 globals
= getdecls ();
2313 /* Really define vars that have had only a tentative definition.
2314 Really output inline functions that must actually be callable
2315 and have not been output so far. */
2318 int len
= list_length (globals
);
2319 tree
*vec
= (tree
*) xmalloc (sizeof (tree
) * len
);
2323 /* Process the decls in reverse order--earliest first.
2324 Put them into VEC from back to front, then take out from front. */
2326 for (i
= 0, decl
= globals
; i
< len
; i
++, decl
= TREE_CHAIN (decl
))
2327 vec
[len
- i
- 1] = decl
;
2329 wrapup_global_declarations (vec
, len
);
2331 /* This must occur after the loop to output deferred functions. Else
2332 the profiler initializer would not be emitted if all the functions
2333 in this compilation unit were deferred.
2335 output_func_start_profiler can not cause any additional functions or
2336 data to need to be output, so it need not be in the deferred function
2338 output_func_start_profiler ();
2340 /* Now that all possible functions have been output, we can dump
2341 the exception table. */
2343 #ifndef IA64_UNWIND_INFO
2344 output_exception_table ();
2346 free_exception_table ();
2348 check_global_declarations (vec
, len
);
2354 /* Write out any pending weak symbol declarations. */
2358 /* Do dbx symbols. */
2359 timevar_push (TV_SYMOUT
);
2360 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
2361 if (write_symbols
== DBX_DEBUG
|| write_symbols
== XCOFF_DEBUG
)
2362 dbxout_finish (asm_out_file
, main_input_filename
);
2365 #ifdef DWARF_DEBUGGING_INFO
2366 if (write_symbols
== DWARF_DEBUG
)
2370 #ifdef DWARF2_UNWIND_INFO
2371 if (dwarf2out_do_frame ())
2372 dwarf2out_frame_finish ();
2375 #ifdef DWARF2_DEBUGGING_INFO
2376 if (write_symbols
== DWARF2_DEBUG
)
2377 dwarf2out_finish ();
2379 timevar_pop (TV_SYMOUT
);
2381 /* Output some stuff at end of file if nec. */
2383 end_final (dump_base_name
);
2385 if (profile_arc_flag
|| flag_test_coverage
|| flag_branch_probabilities
)
2387 timevar_push (TV_DUMP
);
2388 open_dump_file (DFI_bp
, NULL
);
2392 close_dump_file (DFI_bp
, NULL
, NULL_RTX
);
2393 timevar_pop (TV_DUMP
);
2397 ASM_FILE_END (asm_out_file
);
2400 /* Language-specific end of compilation actions. */
2404 /* Close the dump files. */
2406 if (flag_gen_aux_info
)
2408 fclose (aux_info_file
);
2410 unlink (aux_info_file_name
);
2413 if (optimize
> 0 && open_dump_file (DFI_combine
, NULL
))
2415 timevar_push (TV_DUMP
);
2416 dump_combine_total_stats (rtl_dump_file
);
2417 close_dump_file (DFI_combine
, NULL
, NULL_RTX
);
2418 timevar_pop (TV_DUMP
);
2421 /* Close non-debugging input and output files. Take special care to note
2422 whether fclose returns an error, since the pages might still be on the
2423 buffer chain while the file is open. */
2427 if (ferror (asm_out_file
) != 0 || fclose (asm_out_file
) != 0)
2428 fatal_io_error (asm_file_name
);
2430 /* Do whatever is necessary to finish printing the graphs. */
2431 if (graph_dump_format
!= no_graph
)
2435 for (i
= 0; i
< DFI_MAX
; ++i
)
2436 if (dump_file
[i
].initialized
&& dump_file
[i
].graph_dump_p
)
2441 sprintf (seq
, ".%02d.", i
);
2442 suffix
= concat (seq
, dump_file
[i
].extension
, NULL
);
2443 finish_graph_dump_file (dump_base_name
, suffix
);
2448 /* Free up memory for the benefit of leak detectors. */
2451 /* Stop timing total execution time. */
2452 timevar_stop (TV_TOTAL
);
2454 /* Print the times. */
2456 timevar_print (stderr
);
2459 /* This is called from various places for FUNCTION_DECL, VAR_DECL,
2460 and TYPE_DECL nodes.
2462 This does nothing for local (non-static) variables, unless the
2463 variable is a register variable with an ASMSPEC. In that case, or
2464 if the variable is not an automatice, it sets up the RTL and
2465 outputs any assembler code (label definition, storage allocation
2466 and initialization).
2468 DECL is the declaration. If ASMSPEC is nonzero, it specifies
2469 the assembler symbol name to be used. TOP_LEVEL is nonzero
2470 if this declaration is not within a function. */
2473 rest_of_decl_compilation (decl
, asmspec
, top_level
, at_end
)
2475 const char *asmspec
;
2479 /* Declarations of variables, and of functions defined elsewhere. */
2481 /* The most obvious approach, to put an #ifndef around where
2482 this macro is used, doesn't work since it's inside a macro call. */
2483 #ifndef ASM_FINISH_DECLARE_OBJECT
2484 #define ASM_FINISH_DECLARE_OBJECT(FILE, DECL, TOP, END)
2487 /* Forward declarations for nested functions are not "external",
2488 but we need to treat them as if they were. */
2489 if (TREE_STATIC (decl
) || DECL_EXTERNAL (decl
)
2490 || TREE_CODE (decl
) == FUNCTION_DECL
)
2492 timevar_push (TV_VARCONST
);
2493 make_decl_rtl (decl
, asmspec
, top_level
);
2494 /* Initialized extern variable exists to be replaced
2495 with its value, or represents something that will be
2496 output in another file. */
2497 if (! (TREE_CODE (decl
) == VAR_DECL
2498 && DECL_EXTERNAL (decl
) && TREE_READONLY (decl
)
2499 && DECL_INITIAL (decl
) != 0
2500 && DECL_INITIAL (decl
) != error_mark_node
))
2501 /* Don't output anything
2502 when a tentative file-scope definition is seen.
2503 But at end of compilation, do output code for them. */
2504 if (! (! at_end
&& top_level
2505 && (DECL_INITIAL (decl
) == 0
2506 || DECL_INITIAL (decl
) == error_mark_node
)))
2507 assemble_variable (decl
, top_level
, at_end
, 0);
2508 if (decl
== last_assemble_variable_decl
)
2510 ASM_FINISH_DECLARE_OBJECT (asm_out_file
, decl
,
2513 timevar_pop (TV_VARCONST
);
2515 else if (DECL_REGISTER (decl
) && asmspec
!= 0)
2517 if (decode_reg_name (asmspec
) >= 0)
2519 DECL_RTL (decl
) = 0;
2520 make_decl_rtl (decl
, asmspec
, top_level
);
2523 error ("invalid register name `%s' for register variable", asmspec
);
2525 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
2526 else if ((write_symbols
== DBX_DEBUG
|| write_symbols
== XCOFF_DEBUG
)
2527 && TREE_CODE (decl
) == TYPE_DECL
)
2529 timevar_push (TV_SYMOUT
);
2530 dbxout_symbol (decl
, 0);
2531 timevar_pop (TV_SYMOUT
);
2534 #ifdef SDB_DEBUGGING_INFO
2535 else if (write_symbols
== SDB_DEBUG
&& top_level
2536 && TREE_CODE (decl
) == TYPE_DECL
)
2538 timevar_push (TV_SYMOUT
);
2539 sdbout_symbol (decl
, 0);
2540 timevar_pop (TV_SYMOUT
);
2545 /* Called after finishing a record, union or enumeral type. */
2548 rest_of_type_compilation (type
, toplev
)
2549 #if defined(DBX_DEBUGGING_INFO) || defined(XCOFF_DEBUGGING_INFO) || defined (SDB_DEBUGGING_INFO)
2553 tree type ATTRIBUTE_UNUSED
;
2554 int toplev ATTRIBUTE_UNUSED
;
2557 timevar_push (TV_SYMOUT
);
2558 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
2559 if (write_symbols
== DBX_DEBUG
|| write_symbols
== XCOFF_DEBUG
)
2560 dbxout_symbol (TYPE_STUB_DECL (type
), !toplev
);
2562 #ifdef SDB_DEBUGGING_INFO
2563 if (write_symbols
== SDB_DEBUG
)
2564 sdbout_symbol (TYPE_STUB_DECL (type
), !toplev
);
2566 timevar_pop (TV_SYMOUT
);
2569 /* DECL is an inline function, whose body is present, but which is not
2570 being output at this point. (We're putting that off until we need
2571 to do it.) If there are any actions that need to take place,
2572 including the emission of debugging information for the function,
2573 this is where they should go. This function may be called by
2574 language-dependent code for front-ends that do not even generate
2575 RTL for functions that don't need to be put out. */
2578 note_deferral_of_defined_inline_function (decl
)
2579 tree decl ATTRIBUTE_UNUSED
;
2581 #ifdef DWARF_DEBUGGING_INFO
2582 /* Generate the DWARF info for the "abstract" instance of a function
2583 which we may later generate inlined and/or out-of-line instances
2585 if (write_symbols
== DWARF_DEBUG
&& DECL_INLINE (decl
))
2587 /* The front-end may not have set CURRENT_FUNCTION_DECL, but the
2588 DWARF code expects it to be set in this case. Intuitively,
2589 DECL is the function we just finished defining, so setting
2590 CURRENT_FUNCTION_DECL is sensible. */
2591 tree saved_cfd
= current_function_decl
;
2592 current_function_decl
= decl
;
2594 /* Let the DWARF code do its work. */
2595 set_decl_abstract_flags (decl
, 1);
2596 dwarfout_file_scope_decl (decl
, 0);
2597 set_decl_abstract_flags (decl
, 0);
2599 /* Reset CURRENT_FUNCTION_DECL. */
2600 current_function_decl
= saved_cfd
;
2605 /* This is called from finish_function (within yyparse)
2606 after each top-level definition is parsed.
2607 It is supposed to compile that function or variable
2608 and output the assembler code for it.
2609 After we return, the tree storage is freed. */
2612 rest_of_compilation (decl
)
2618 int rebuild_label_notes_after_reload
;
2619 int register_life_up_to_date
;
2621 timevar_push (TV_REST_OF_COMPILATION
);
2623 /* When processing delayed functions, prepare_function_start() won't
2624 have been run to re-initialize it. */
2625 cse_not_expected
= ! optimize
;
2627 /* First, make sure that NOTE_BLOCK is set correctly for each
2628 NOTE_INSN_BLOCK_BEG/NOTE_INSN_BLOCK_END note. */
2629 if (!cfun
->x_whole_function_mode_p
)
2632 /* Then remove any notes we don't need. That will make iterating
2633 over the instruction sequence faster, and allow the garbage
2634 collector to reclaim the memory used by the notes. */
2635 remove_unnecessary_notes ();
2637 /* In function-at-a-time mode, we do not attempt to keep the BLOCK
2638 tree in sensible shape. So, we just recalculate it here. */
2639 if (cfun
->x_whole_function_mode_p
)
2642 /* If we are reconsidering an inline function
2643 at the end of compilation, skip the stuff for making it inline. */
2645 if (DECL_SAVED_INSNS (decl
) == 0)
2651 /* If this is nested inside an inlined external function, pretend
2652 it was only declared. Since we cannot inline such functions,
2653 generating code for this one is not only not necessary but will
2654 confuse some debugging output writers. */
2655 for (parent
= DECL_CONTEXT (current_function_decl
);
2656 parent
!= NULL_TREE
;
2657 parent
= get_containing_scope (parent
))
2658 if (TREE_CODE (parent
) == FUNCTION_DECL
2659 && DECL_INLINE (parent
) && DECL_EXTERNAL (parent
))
2661 DECL_INITIAL (decl
) = 0;
2662 goto exit_rest_of_compilation
;
2665 /* If requested, consider whether to make this function inline. */
2666 if (DECL_INLINE (decl
) || flag_inline_functions
)
2668 timevar_push (TV_INTEGRATION
);
2669 lose
= function_cannot_inline_p (decl
);
2670 timevar_pop (TV_INTEGRATION
);
2671 if (lose
|| ! optimize
)
2673 if (warn_inline
&& DECL_INLINE (decl
))
2674 warning_with_decl (decl
, lose
);
2675 DECL_ABSTRACT_ORIGIN (decl
) = 0;
2676 /* Don't really compile an extern inline function.
2677 If we can't make it inline, pretend
2678 it was only declared. */
2679 if (DECL_EXTERNAL (decl
))
2681 DECL_INITIAL (decl
) = 0;
2682 goto exit_rest_of_compilation
;
2686 /* ??? Note that this has the effect of making it look
2687 like "inline" was specified for a function if we choose
2688 to inline it. This isn't quite right, but it's
2689 probably not worth the trouble to fix. */
2690 inlinable
= DECL_INLINE (decl
) = 1;
2693 insns
= get_insns ();
2695 /* Dump the rtl code if we are dumping rtl. */
2697 if (open_dump_file (DFI_rtl
, decl
))
2699 if (DECL_SAVED_INSNS (decl
))
2700 fprintf (rtl_dump_file
, ";; (integrable)\n\n");
2701 close_dump_file (DFI_rtl
, print_rtl
, insns
);
2704 /* If function is inline, and we don't yet know whether to
2705 compile it by itself, defer decision till end of compilation.
2706 finish_compilation will call rest_of_compilation again
2707 for those functions that need to be output. Also defer those
2708 functions that we are supposed to defer. */
2711 || (DECL_INLINE (decl
)
2712 && ((! TREE_PUBLIC (decl
) && ! TREE_ADDRESSABLE (decl
)
2713 && ! flag_keep_inline_functions
)
2714 || DECL_EXTERNAL (decl
))))
2715 DECL_DEFER_OUTPUT (decl
) = 1;
2717 if (DECL_INLINE (decl
))
2718 /* DWARF wants seperate debugging info for abstract and
2719 concrete instances of all inline functions, including those
2720 declared inline but not inlined, and those inlined even
2721 though they weren't declared inline. Conveniently, that's
2722 what DECL_INLINE means at this point. */
2723 note_deferral_of_defined_inline_function (decl
);
2725 if (DECL_DEFER_OUTPUT (decl
))
2727 /* If -Wreturn-type, we have to do a bit of compilation.
2728 However, if we just fall through we will call
2729 save_for_inline_copying() which results in excessive
2730 memory use. Instead, we just want to call
2731 jump_optimize() to figure out whether or not we can fall
2732 off the end of the function; we do the minimum amount of
2733 work necessary to make that safe. And, we set optimize
2734 to zero to keep jump_optimize from working too hard. */
2735 if (warn_return_type
)
2737 int saved_optimize
= optimize
;
2739 find_exception_handler_labels ();
2740 jump_optimize (insns
, !JUMP_CROSS_JUMP
, !JUMP_NOOP_MOVES
,
2741 !JUMP_AFTER_REGSCAN
);
2742 optimize
= saved_optimize
;
2745 current_function_nothrow
= nothrow_function_p ();
2746 if (current_function_nothrow
)
2747 /* Now we know that this can't throw; set the flag for the benefit
2748 of other functions later in this translation unit. */
2749 TREE_NOTHROW (current_function_decl
) = 1;
2751 timevar_push (TV_INTEGRATION
);
2752 save_for_inline_nocopy (decl
);
2753 timevar_pop (TV_INTEGRATION
);
2754 DECL_SAVED_INSNS (decl
)->inlinable
= inlinable
;
2755 goto exit_rest_of_compilation
;
2758 /* If specified extern inline but we aren't inlining it, we are
2759 done. This goes for anything that gets here with DECL_EXTERNAL
2760 set, not just things with DECL_INLINE. */
2761 if (DECL_EXTERNAL (decl
))
2762 goto exit_rest_of_compilation
;
2765 init_EXPR_INSN_LIST_cache ();
2770 /* Initialize some variables used by the optimizers. */
2771 init_function_for_compilation ();
2773 if (! DECL_DEFER_OUTPUT (decl
))
2774 TREE_ASM_WRITTEN (decl
) = 1;
2776 /* Now that integrate will no longer see our rtl, we need not distinguish
2777 between the return value of this function and the return value of called
2779 rtx_equal_function_value_matters
= 0;
2781 /* Don't return yet if -Wreturn-type; we need to do jump_optimize. */
2782 if ((rtl_dump_and_exit
|| flag_syntax_only
) && !warn_return_type
)
2783 goto exit_rest_of_compilation
;
2785 /* Emit code to get eh context, if needed. */
2788 /* We may have potential sibling or tail recursion sites. Select one
2789 (of possibly multiple) methods of performing the call. */
2790 if (flag_optimize_sibling_calls
)
2792 timevar_push (TV_JUMP
);
2793 open_dump_file (DFI_sibling
, decl
);
2795 optimize_sibling_and_tail_recursive_calls ();
2797 close_dump_file (DFI_sibling
, print_rtl
, get_insns ());
2798 timevar_pop (TV_JUMP
);
2802 /* If we are doing position-independent code generation, now
2803 is the time to output special prologues and epilogues.
2804 We do not want to do this earlier, because it just clutters
2805 up inline functions with meaningless insns. */
2810 /* From now on, allocate rtl in current_obstack, not in saveable_obstack.
2811 Note that that may have been done above, in save_for_inline_copying.
2812 The call to resume_temporary_allocation near the end of this function
2813 goes back to the usual state of affairs. This must be done after
2814 we've built up any unwinders for exception handling, and done
2815 the FINALIZE_PIC work, if necessary. */
2817 rtl_in_current_obstack ();
2819 insns
= get_insns ();
2821 /* Copy any shared structure that should not be shared. */
2822 unshare_all_rtl (current_function_decl
, insns
);
2824 #ifdef SETJMP_VIA_SAVE_AREA
2825 /* This must be performed before virutal register instantiation. */
2826 if (current_function_calls_alloca
)
2827 optimize_save_area_alloca (insns
);
2830 /* Instantiate all virtual registers. */
2831 instantiate_virtual_regs (current_function_decl
, insns
);
2833 /* Find all the EH handlers. */
2834 find_exception_handler_labels ();
2836 open_dump_file (DFI_jump
, decl
);
2838 /* Always do one jump optimization pass to ensure that JUMP_LABEL fields
2839 are initialized and to compute whether control can drop off the end
2842 timevar_push (TV_JUMP
);
2843 /* Turn NOTE_INSN_EXPECTED_VALUE into REG_BR_PROB. Do this
2844 before jump optimization switches branch directions. */
2845 expected_value_to_br_prob ();
2847 reg_scan (insns
, max_reg_num (), 0);
2848 jump_optimize (insns
, !JUMP_CROSS_JUMP
, !JUMP_NOOP_MOVES
,
2849 JUMP_AFTER_REGSCAN
);
2851 timevar_pop (TV_JUMP
);
2853 /* Now is when we stop if -fsyntax-only and -Wreturn-type. */
2854 if (rtl_dump_and_exit
|| flag_syntax_only
|| DECL_DEFER_OUTPUT (decl
))
2856 close_dump_file (DFI_jump
, print_rtl
, insns
);
2857 goto exit_rest_of_compilation
;
2860 timevar_push (TV_JUMP
);
2864 find_basic_blocks (insns
, max_reg_num (), rtl_dump_file
);
2865 cleanup_cfg (insns
);
2867 /* ??? Run if-conversion before delete_null_pointer_checks,
2868 since the later does not preserve the CFG. This should
2869 be changed -- no since converting if's that are going to
2871 timevar_push (TV_IFCVT
);
2873 timevar_pop (TV_IFCVT
);
2875 /* Try to identify useless null pointer tests and delete them. */
2876 if (flag_delete_null_pointer_checks
)
2877 delete_null_pointer_checks (insns
);
2880 /* Jump optimization, and the removal of NULL pointer checks, may
2881 have reduced the number of instructions substantially. CSE, and
2882 future passes, allocate arrays whose dimensions involve the
2883 maximum instruction UID, so if we can reduce the maximum UID
2884 we'll save big on memory. */
2885 renumber_insns (rtl_dump_file
);
2886 timevar_pop (TV_JUMP
);
2888 close_dump_file (DFI_jump
, print_rtl
, insns
);
2893 /* Perform common subexpression elimination.
2894 Nonzero value from `cse_main' means that jumps were simplified
2895 and some code may now be unreachable, so do
2896 jump optimization again. */
2900 open_dump_file (DFI_cse
, decl
);
2901 timevar_push (TV_CSE
);
2903 reg_scan (insns
, max_reg_num (), 1);
2905 if (flag_thread_jumps
)
2907 timevar_push (TV_JUMP
);
2908 thread_jumps (insns
, max_reg_num (), 1);
2909 timevar_pop (TV_JUMP
);
2912 tem
= cse_main (insns
, max_reg_num (), 0, rtl_dump_file
);
2914 /* If we are not running the second CSE pass, then we are no longer
2915 expecting CSE to be run. */
2916 cse_not_expected
= !flag_rerun_cse_after_loop
;
2918 if (tem
|| optimize
> 1)
2920 timevar_push (TV_JUMP
);
2921 jump_optimize (insns
, !JUMP_CROSS_JUMP
, !JUMP_NOOP_MOVES
,
2922 !JUMP_AFTER_REGSCAN
);
2923 timevar_pop (TV_JUMP
);
2926 /* Run this after jump optmizations remove all the unreachable code
2927 so that unreachable code will not keep values live. */
2928 delete_trivially_dead_insns (insns
, max_reg_num ());
2930 /* Try to identify useless null pointer tests and delete them. */
2931 if (flag_delete_null_pointer_checks
)
2933 timevar_push (TV_JUMP
);
2934 find_basic_blocks (insns
, max_reg_num (), rtl_dump_file
);
2936 cleanup_cfg (insns
);
2938 delete_null_pointer_checks (insns
);
2939 timevar_pop (TV_JUMP
);
2942 /* The second pass of jump optimization is likely to have
2943 removed a bunch more instructions. */
2944 renumber_insns (rtl_dump_file
);
2946 timevar_pop (TV_CSE
);
2947 close_dump_file (DFI_cse
, print_rtl
, insns
);
2950 open_dump_file (DFI_addressof
, decl
);
2952 purge_addressof (insns
);
2953 reg_scan (insns
, max_reg_num (), 1);
2955 close_dump_file (DFI_addressof
, print_rtl
, insns
);
2960 if (optimize
> 0 && flag_ssa
)
2962 /* Convert to SSA form. */
2964 timevar_push (TV_TO_SSA
);
2965 open_dump_file (DFI_ssa
, decl
);
2967 find_basic_blocks (insns
, max_reg_num (), rtl_dump_file
);
2968 cleanup_cfg (insns
);
2971 close_dump_file (DFI_ssa
, print_rtl_with_bb
, insns
);
2972 timevar_pop (TV_TO_SSA
);
2974 /* The SSA implementation uses basic block numbers in its phi
2975 nodes. Thus, changing the control-flow graph or the basic
2976 blocks, e.g., calling find_basic_blocks () or cleanup_cfg (),
2977 may cause problems. */
2981 /* Remove dead code. */
2983 timevar_push (TV_DEAD_CODE_ELIM
);
2984 open_dump_file (DFI_dce
, decl
);
2986 insns
= get_insns ();
2987 eliminate_dead_code();
2989 close_dump_file (DFI_dce
, print_rtl_with_bb
, insns
);
2990 timevar_pop (TV_DEAD_CODE_ELIM
);
2993 /* Convert from SSA form. */
2995 timevar_push (TV_FROM_SSA
);
2996 open_dump_file (DFI_ussa
, decl
);
2998 convert_from_ssa ();
2999 /* New registers have been created. Rescan their usage. */
3000 reg_scan (insns
, max_reg_num (), 1);
3001 /* Life analysis used in SSA adds log_links but these
3002 shouldn't be there until the flow stage, so clear
3004 clear_log_links (insns
);
3006 close_dump_file (DFI_ussa
, print_rtl_with_bb
, insns
);
3007 timevar_pop (TV_FROM_SSA
);
3013 /* Perform global cse. */
3015 if (optimize
> 0 && flag_gcse
)
3017 timevar_push (TV_GCSE
);
3018 open_dump_file (DFI_gcse
, decl
);
3020 find_basic_blocks (insns
, max_reg_num (), rtl_dump_file
);
3021 cleanup_cfg (insns
);
3022 tem
= gcse_main (insns
, rtl_dump_file
);
3024 /* If gcse altered any jumps, rerun jump optimizations to clean
3028 timevar_push (TV_JUMP
);
3029 jump_optimize (insns
, !JUMP_CROSS_JUMP
, !JUMP_NOOP_MOVES
,
3030 !JUMP_AFTER_REGSCAN
);
3031 timevar_pop (TV_JUMP
);
3034 close_dump_file (DFI_gcse
, print_rtl
, insns
);
3035 timevar_pop (TV_GCSE
);
3041 /* Move constant computations out of loops. */
3045 timevar_push (TV_LOOP
);
3046 open_dump_file (DFI_loop
, decl
);
3048 if (flag_rerun_loop_opt
)
3050 /* We only want to perform unrolling once. */
3052 loop_optimize (insns
, rtl_dump_file
, 0);
3054 /* The first call to loop_optimize makes some instructions
3055 trivially dead. We delete those instructions now in the
3056 hope that doing so will make the heuristics in loop work
3057 better and possibly speed up compilation. */
3058 delete_trivially_dead_insns (insns
, max_reg_num ());
3060 /* The regscan pass is currently necessary as the alias
3061 analysis code depends on this information. */
3062 reg_scan (insns
, max_reg_num (), 1);
3064 loop_optimize (insns
, rtl_dump_file
,
3065 (flag_unroll_loops
? LOOP_UNROLL
: 0) | LOOP_BCT
);
3067 close_dump_file (DFI_loop
, print_rtl
, insns
);
3068 timevar_pop (TV_LOOP
);
3076 timevar_push (TV_CSE2
);
3077 open_dump_file (DFI_cse2
, decl
);
3079 if (flag_rerun_cse_after_loop
)
3081 /* Running another jump optimization pass before the second
3082 cse pass sometimes simplifies the RTL enough to allow
3083 the second CSE pass to do a better job. Jump_optimize can change
3084 max_reg_num so we must rerun reg_scan afterwards.
3085 ??? Rework to not call reg_scan so often. */
3086 timevar_push (TV_JUMP
);
3088 reg_scan (insns
, max_reg_num (), 0);
3089 jump_optimize (insns
, !JUMP_CROSS_JUMP
,
3090 !JUMP_NOOP_MOVES
, JUMP_AFTER_REGSCAN
);
3092 timevar_push (TV_IFCVT
);
3094 find_basic_blocks (insns
, max_reg_num (), rtl_dump_file
);
3095 cleanup_cfg (insns
);
3098 timevar_pop(TV_IFCVT
);
3100 timevar_pop (TV_JUMP
);
3102 reg_scan (insns
, max_reg_num (), 0);
3103 tem
= cse_main (insns
, max_reg_num (), 1, rtl_dump_file
);
3107 timevar_push (TV_JUMP
);
3108 jump_optimize (insns
, !JUMP_CROSS_JUMP
,
3109 !JUMP_NOOP_MOVES
, !JUMP_AFTER_REGSCAN
);
3110 timevar_pop (TV_JUMP
);
3114 if (flag_thread_jumps
)
3116 /* This pass of jump threading straightens out code
3117 that was kinked by loop optimization. */
3118 timevar_push (TV_JUMP
);
3119 reg_scan (insns
, max_reg_num (), 0);
3120 thread_jumps (insns
, max_reg_num (), 0);
3121 timevar_pop (TV_JUMP
);
3124 close_dump_file (DFI_cse2
, print_rtl
, insns
);
3125 timevar_pop (TV_CSE2
);
3131 cse_not_expected
= 1;
3135 /* Do control and data flow analysis; wrote some of the results to
3138 timevar_push (TV_FLOW
);
3139 open_dump_file (DFI_cfg
, decl
);
3141 find_basic_blocks (insns
, max_reg_num (), rtl_dump_file
);
3142 cleanup_cfg (insns
);
3144 close_dump_file (DFI_cfg
, print_rtl_with_bb
, insns
);
3146 if (profile_arc_flag
|| flag_test_coverage
|| flag_branch_probabilities
)
3148 timevar_push (TV_BRANCH_PROB
);
3149 open_dump_file (DFI_bp
, decl
);
3153 close_dump_file (DFI_bp
, print_rtl_with_bb
, insns
);
3154 timevar_pop (TV_BRANCH_PROB
);
3157 open_dump_file (DFI_life
, decl
);
3162 /* Discover and record the loop depth at the head of each basic
3163 block. The loop infrastructure does the real job for us. */
3164 flow_loops_find (&loops
);
3166 /* Estimate using heuristics if no profiling info is available. */
3167 estimate_probability (&loops
);
3170 flow_loops_dump (&loops
, rtl_dump_file
, 0);
3172 flow_loops_free (&loops
);
3174 life_analysis (insns
, rtl_dump_file
, PROP_FINAL
);
3175 mark_constant_function ();
3176 timevar_pop (TV_FLOW
);
3178 register_life_up_to_date
= 1;
3181 if (warn_uninitialized
|| extra_warnings
)
3183 uninitialized_vars_warning (DECL_INITIAL (decl
));
3185 setjmp_args_warning ();
3188 close_dump_file (DFI_life
, print_rtl_with_bb
, insns
);
3193 /* If -opt, try combining insns through substitution. */
3197 int rebuild_jump_labels_after_combine
= 0;
3199 timevar_push (TV_COMBINE
);
3200 open_dump_file (DFI_combine
, decl
);
3202 rebuild_jump_labels_after_combine
3203 = combine_instructions (insns
, max_reg_num ());
3205 /* Combining insns may have turned an indirect jump into a
3206 direct jump. Rebuid the JUMP_LABEL fields of jumping
3208 if (rebuild_jump_labels_after_combine
)
3210 timevar_push (TV_JUMP
);
3211 rebuild_jump_labels (insns
);
3212 timevar_pop (TV_JUMP
);
3214 timevar_push (TV_FLOW
);
3215 find_basic_blocks (insns
, max_reg_num (), rtl_dump_file
);
3216 cleanup_cfg (insns
);
3218 /* Blimey. We've got to have the CFG up to date for the call to
3219 if_convert below. However, the random deletion of blocks
3220 without updating life info can wind up with Wierd Stuff in
3221 global_live_at_end. We then run sched1, which updates things
3222 properly, discovers the wierdness and aborts. */
3223 update_life_info (NULL
, UPDATE_LIFE_GLOBAL_RM_NOTES
,
3224 PROP_DEATH_NOTES
| PROP_KILL_DEAD_CODE
3225 | PROP_SCAN_DEAD_CODE
);
3227 timevar_pop (TV_FLOW
);
3230 close_dump_file (DFI_combine
, print_rtl_with_bb
, insns
);
3231 timevar_pop (TV_COMBINE
);
3237 /* Rerun if-conversion, as combine may have simplified things enough to
3238 now meet sequence length restrictions. */
3241 timevar_push (TV_IFCVT
);
3242 open_dump_file (DFI_ce
, decl
);
3248 close_dump_file (DFI_ce
, print_rtl_with_bb
, insns
);
3249 timevar_pop (TV_IFCVT
);
3252 /* Register allocation pre-pass, to reduce number of moves
3253 necessary for two-address machines. */
3254 if (optimize
> 0 && (flag_regmove
|| flag_expensive_optimizations
))
3256 timevar_push (TV_REGMOVE
);
3257 open_dump_file (DFI_regmove
, decl
);
3259 regmove_optimize (insns
, max_reg_num (), rtl_dump_file
);
3261 close_dump_file (DFI_regmove
, print_rtl_with_bb
, insns
);
3262 timevar_pop (TV_REGMOVE
);
3268 /* Any of the several passes since flow1 will have munged register
3269 lifetime data a bit. */
3271 register_life_up_to_date
= 0;
3273 #ifdef OPTIMIZE_MODE_SWITCHING
3276 timevar_push (TV_GCSE
);
3278 if (optimize_mode_switching (NULL_PTR
))
3280 /* We did work, and so had to regenerate global life information.
3281 Take advantage of this and don't re-recompute register life
3282 information below. */
3283 register_life_up_to_date
= 1;
3286 timevar_pop (TV_GCSE
);
3290 #ifdef INSN_SCHEDULING
3292 /* Print function header into sched dump now
3293 because doing the sched analysis makes some of the dump. */
3294 if (optimize
> 0 && flag_schedule_insns
)
3296 timevar_push (TV_SCHED
);
3297 open_dump_file (DFI_sched
, decl
);
3299 /* Do control and data sched analysis,
3300 and write some of the results to dump file. */
3302 schedule_insns (rtl_dump_file
);
3304 close_dump_file (DFI_sched
, print_rtl_with_bb
, insns
);
3305 timevar_pop (TV_SCHED
);
3310 /* Register lifetime information was updated as part of verifying
3312 register_life_up_to_date
= 1;
3316 /* Determine if the current function is a leaf before running reload
3317 since this can impact optimizations done by the prologue and
3318 epilogue thus changing register elimination offsets. */
3319 current_function_is_leaf
= leaf_function_p ();
3321 timevar_push (TV_LOCAL_ALLOC
);
3322 open_dump_file (DFI_lreg
, decl
);
3324 /* Allocate pseudo-regs that are used only within 1 basic block.
3326 RUN_JUMP_AFTER_RELOAD records whether or not we need to rerun the
3327 jump optimizer after register allocation and reloading are finished. */
3329 if (! register_life_up_to_date
)
3330 recompute_reg_usage (insns
, ! optimize_size
);
3331 regclass (insns
, max_reg_num (), rtl_dump_file
);
3332 rebuild_label_notes_after_reload
= local_alloc ();
3334 timevar_pop (TV_LOCAL_ALLOC
);
3336 if (dump_file
[DFI_lreg
].enabled
)
3338 timevar_push (TV_DUMP
);
3340 dump_flow_info (rtl_dump_file
);
3341 dump_local_alloc (rtl_dump_file
);
3343 close_dump_file (DFI_lreg
, print_rtl_with_bb
, insns
);
3344 timevar_pop (TV_DUMP
);
3350 timevar_push (TV_GLOBAL_ALLOC
);
3351 open_dump_file (DFI_greg
, decl
);
3353 /* If optimizing, allocate remaining pseudo-regs. Do the reload
3354 pass fixing up any insns that are invalid. */
3357 failure
= global_alloc (rtl_dump_file
);
3360 build_insn_chain (insns
);
3361 failure
= reload (insns
, 0);
3364 timevar_pop (TV_GLOBAL_ALLOC
);
3367 goto exit_rest_of_compilation
;
3372 /* Do a very simple CSE pass over just the hard registers. */
3375 timevar_push (TV_RELOAD_CSE_REGS
);
3376 reload_cse_regs (insns
);
3377 timevar_pop (TV_RELOAD_CSE_REGS
);
3380 /* If optimizing, then go ahead and split insns now since we are about
3381 to recompute flow information anyway. */
3384 int old_labelnum
= max_label_num ();
3386 split_all_insns (0);
3387 rebuild_label_notes_after_reload
|= old_labelnum
!= max_label_num ();
3390 /* Register allocation and reloading may have turned an indirect jump into
3391 a direct jump. If so, we must rebuild the JUMP_LABEL fields of
3392 jumping instructions. */
3393 if (rebuild_label_notes_after_reload
)
3395 timevar_push (TV_JUMP
);
3397 rebuild_jump_labels (insns
);
3399 timevar_pop (TV_JUMP
);
3402 if (dump_file
[DFI_greg
].enabled
)
3404 timevar_push (TV_DUMP
);
3406 dump_global_regs (rtl_dump_file
);
3408 close_dump_file (DFI_greg
, print_rtl_with_bb
, insns
);
3409 timevar_pop (TV_DUMP
);
3412 /* Re-create the death notes which were deleted during reload. */
3413 timevar_push (TV_FLOW2
);
3414 open_dump_file (DFI_flow2
, decl
);
3416 jump_optimize (insns
, !JUMP_CROSS_JUMP
,
3417 !JUMP_NOOP_MOVES
, !JUMP_AFTER_REGSCAN
);
3418 find_basic_blocks (insns
, max_reg_num (), rtl_dump_file
);
3420 /* On some machines, the prologue and epilogue code, or parts thereof,
3421 can be represented as RTL. Doing so lets us schedule insns between
3422 it and the rest of the code and also allows delayed branch
3423 scheduling to operate in the epilogue. */
3424 thread_prologue_and_epilogue_insns (insns
);
3428 cleanup_cfg (insns
);
3429 life_analysis (insns
, rtl_dump_file
, PROP_FINAL
);
3431 /* This is kind of a heuristic. We need to run combine_stack_adjustments
3432 even for machines with possibly nonzero RETURN_POPS_ARGS
3433 and ACCUMULATE_OUTGOING_ARGS. We expect that only ports having
3434 push instructions will have popping returns. */
3435 #ifndef PUSH_ROUNDING
3436 if (!ACCUMULATE_OUTGOING_ARGS
)
3438 combine_stack_adjustments ();
3444 flow2_completed
= 1;
3446 close_dump_file (DFI_flow2
, print_rtl_with_bb
, insns
);
3447 timevar_pop (TV_FLOW2
);
3451 timevar_push (TV_IFCVT2
);
3452 open_dump_file (DFI_ce2
, decl
);
3456 close_dump_file (DFI_ce2
, print_rtl_with_bb
, insns
);
3457 timevar_pop (TV_IFCVT2
);
3460 #ifdef HAVE_peephole2
3461 if (optimize
> 0 && flag_peephole2
)
3463 timevar_push (TV_PEEPHOLE2
);
3464 open_dump_file (DFI_peephole2
, decl
);
3466 peephole2_optimize (rtl_dump_file
);
3468 close_dump_file (DFI_peephole2
, print_rtl_with_bb
, insns
);
3469 timevar_pop (TV_PEEPHOLE2
);
3473 if (optimize
> 0 && flag_rename_registers
)
3475 timevar_push (TV_RENAME_REGISTERS
);
3476 open_dump_file (DFI_rnreg
, decl
);
3478 regrename_optimize ();
3480 close_dump_file (DFI_rnreg
, print_rtl_with_bb
, insns
);
3481 timevar_pop (TV_RENAME_REGISTERS
);
3484 #ifdef INSN_SCHEDULING
3485 if (optimize
> 0 && flag_schedule_insns_after_reload
)
3487 timevar_push (TV_SCHED2
);
3488 open_dump_file (DFI_sched2
, decl
);
3490 /* Do control and data sched analysis again,
3491 and write some more of the results to dump file. */
3493 schedule_insns (rtl_dump_file
);
3495 close_dump_file (DFI_sched2
, print_rtl_with_bb
, insns
);
3496 timevar_pop (TV_SCHED2
);
3503 #ifdef LEAF_REGISTERS
3504 current_function_uses_only_leaf_regs
3505 = optimize
> 0 && only_leaf_regs_used () && leaf_function_p ();
3508 if (optimize
> 0 && flag_reorder_blocks
)
3510 timevar_push (TV_REORDER_BLOCKS
);
3511 open_dump_file (DFI_bbro
, decl
);
3513 reorder_basic_blocks ();
3515 close_dump_file (DFI_bbro
, print_rtl_with_bb
, insns
);
3516 timevar_pop (TV_REORDER_BLOCKS
);
3519 /* One more attempt to remove jumps to .+1 left by dead-store elimination.
3520 Also do cross-jumping this time and delete no-op move insns. */
3524 timevar_push (TV_JUMP
);
3525 open_dump_file (DFI_jump2
, decl
);
3527 jump_optimize (insns
, JUMP_CROSS_JUMP
, JUMP_NOOP_MOVES
,
3528 !JUMP_AFTER_REGSCAN
);
3530 /* CFG no longer kept up to date. */
3532 close_dump_file (DFI_jump2
, print_rtl_with_bb
, insns
);
3533 timevar_pop (TV_JUMP
);
3536 /* If a machine dependent reorganization is needed, call it. */
3537 #ifdef MACHINE_DEPENDENT_REORG
3538 open_dump_file (DFI_mach
, decl
);
3540 MACHINE_DEPENDENT_REORG (insns
);
3542 close_dump_file (DFI_mach
, print_rtl_with_bb
, insns
);
3548 /* If a scheduling pass for delayed branches is to be done,
3549 call the scheduling code. */
3552 if (optimize
> 0 && flag_delayed_branch
)
3554 timevar_push (TV_DBR_SCHED
);
3555 open_dump_file (DFI_dbr
, decl
);
3557 dbr_schedule (insns
, rtl_dump_file
);
3559 close_dump_file (DFI_dbr
, print_rtl_with_bb
, insns
);
3560 timevar_pop (TV_DBR_SCHED
);
3567 /* Shorten branches.
3569 Note this must run before reg-stack because of death note (ab)use
3570 in the ia32 backend. */
3571 timevar_push (TV_SHORTEN_BRANCH
);
3572 shorten_branches (get_insns ());
3573 timevar_pop (TV_SHORTEN_BRANCH
);
3576 timevar_push (TV_REG_STACK
);
3577 open_dump_file (DFI_stack
, decl
);
3579 reg_to_stack (insns
, rtl_dump_file
);
3581 close_dump_file (DFI_stack
, print_rtl_with_bb
, insns
);
3582 timevar_pop (TV_REG_STACK
);
3588 current_function_nothrow
= nothrow_function_p ();
3589 if (current_function_nothrow
)
3590 /* Now we know that this can't throw; set the flag for the benefit
3591 of other functions later in this translation unit. */
3592 TREE_NOTHROW (current_function_decl
) = 1;
3594 /* Now turn the rtl into assembler code. */
3596 timevar_push (TV_FINAL
);
3601 /* Get the function's name, as described by its RTL. This may be
3602 different from the DECL_NAME name used in the source file. */
3604 x
= DECL_RTL (decl
);
3605 if (GET_CODE (x
) != MEM
)
3608 if (GET_CODE (x
) != SYMBOL_REF
)
3610 fnname
= XSTR (x
, 0);
3612 assemble_start_function (decl
, fnname
);
3613 final_start_function (insns
, asm_out_file
, optimize
);
3614 final (insns
, asm_out_file
, optimize
, 0);
3615 final_end_function (insns
, asm_out_file
, optimize
);
3616 assemble_end_function (decl
, fnname
);
3618 fflush (asm_out_file
);
3620 /* Release all memory allocated by flow. */
3621 free_basic_block_vars (0);
3623 /* Release all memory held by regsets now. */
3624 regset_release_memory ();
3626 timevar_pop (TV_FINAL
);
3631 /* Write DBX symbols if requested. */
3633 /* Note that for those inline functions where we don't initially
3634 know for certain that we will be generating an out-of-line copy,
3635 the first invocation of this routine (rest_of_compilation) will
3636 skip over this code by doing a `goto exit_rest_of_compilation;'.
3637 Later on, finish_compilation will call rest_of_compilation again
3638 for those inline functions that need to have out-of-line copies
3639 generated. During that call, we *will* be routed past here. */
3641 timevar_push (TV_SYMOUT
);
3642 #ifdef DBX_DEBUGGING_INFO
3643 if (write_symbols
== DBX_DEBUG
)
3644 dbxout_function (decl
);
3647 #ifdef DWARF_DEBUGGING_INFO
3648 if (write_symbols
== DWARF_DEBUG
)
3649 dwarfout_file_scope_decl (decl
, 0);
3652 #ifdef DWARF2_DEBUGGING_INFO
3653 if (write_symbols
== DWARF2_DEBUG
)
3654 dwarf2out_decl (decl
);
3656 timevar_pop (TV_SYMOUT
);
3658 exit_rest_of_compilation
:
3660 /* In case the function was not output,
3661 don't leave any temporary anonymous types
3662 queued up for sdb output. */
3663 #ifdef SDB_DEBUGGING_INFO
3664 if (write_symbols
== SDB_DEBUG
)
3665 sdbout_types (NULL_TREE
);
3668 reload_completed
= 0;
3669 flow2_completed
= 0;
3672 timevar_push (TV_FINAL
);
3674 /* Clear out the insn_length contents now that they are no
3676 init_insn_lengths ();
3678 /* Clear out the real_constant_chain before some of the rtx's
3679 it runs through become garbage. */
3680 clear_const_double_mem ();
3682 /* Cancel the effect of rtl_in_current_obstack. */
3683 resume_temporary_allocation ();
3685 /* Show no temporary slots allocated. */
3688 free_basic_block_vars (0);
3690 timevar_pop (TV_FINAL
);
3692 /* Make sure volatile mem refs aren't considered valid operands for
3693 arithmetic insns. We must call this here if this is a nested inline
3694 function, since the above code leaves us in the init_recog state
3695 (from final.c), and the function context push/pop code does not
3696 save/restore volatile_ok.
3698 ??? Maybe it isn't necessary for expand_start_function to call this
3699 anymore if we do it here? */
3701 init_recog_no_volatile ();
3703 /* We're done with this function. Free up memory if we can. */
3704 free_after_parsing (cfun
);
3705 if (! DECL_DEFER_OUTPUT (decl
))
3706 free_after_compilation (cfun
);
3712 timevar_pop (TV_REST_OF_COMPILATION
);
3723 printf (_("Usage: %s input [switches]\n"), progname
);
3724 printf (_("Switches:\n"));
3726 printf (_(" -ffixed-<register> Mark <register> as being unavailable to the compiler\n"));
3727 printf (_(" -fcall-used-<register> Mark <register> as being corrupted by function calls\n"));
3728 printf (_(" -fcall-saved-<register> Mark <register> as being preserved across functions\n"));
3729 printf (_(" -finline-limit=<number> Limits the size of inlined functions to <number>\n"));
3730 printf (_(" -fmessage-length=<number> Limits diagnostics messages lengths to <number> characters per line. 0 suppresses line-wrapping\n"));
3731 printf (_(" -fdiagnostics-show-location=[once | never] Indicates how often source location information should be emitted, as prefix, at the beginning of diagnostics when line-wrapping\n"));
3733 for (i
= NUM_ELEM (f_options
); i
--;)
3735 const char *description
= f_options
[i
].description
;
3737 if (description
!= NULL
&& * description
!= 0)
3738 printf (" -f%-21s %s\n",
3739 f_options
[i
].string
, description
);
3742 printf (_(" -O[number] Set optimisation level to [number]\n"));
3743 printf (_(" -Os Optimise for space rather than speed\n"));
3744 printf (_(" -pedantic Issue warnings needed by strict compliance to ISO C\n"));
3745 printf (_(" -pedantic-errors Like -pedantic except that errors are produced\n"));
3746 printf (_(" -w Suppress warnings\n"));
3747 printf (_(" -W Enable extra warnings\n"));
3749 for (i
= NUM_ELEM (W_options
); i
--;)
3751 const char *description
= W_options
[i
].description
;
3753 if (description
!= NULL
&& * description
!= 0)
3754 printf (" -W%-21s %s\n",
3755 W_options
[i
].string
, description
);
3758 printf (_(" -Wunused Enable unused warnings\n"));
3759 printf (_(" -Wid-clash-<num> Warn if 2 identifiers have the same first <num> chars\n"));
3760 printf (_(" -Wlarger-than-<number> Warn if an object is larger than <number> bytes\n"));
3761 printf (_(" -p Enable function profiling\n"));
3762 #if defined (BLOCK_PROFILER) || defined (FUNCTION_BLOCK_PROFILER)
3763 printf (_(" -a Enable block profiling \n"));
3765 #if defined (BLOCK_PROFILER) || defined (FUNCTION_BLOCK_PROFILER) || defined FUNCTION_BLOCK_PROFILER_EXIT
3766 printf (_(" -ax Enable jump profiling \n"));
3768 printf (_(" -o <file> Place output into <file> \n"));
3770 -G <number> Put global and static data smaller than <number>\n\
3771 bytes into a special section (on some targets)\n"));
3773 for (i
= NUM_ELEM (debug_args
); i
--;)
3775 if (debug_args
[i
].description
!= NULL
)
3776 printf (" -g%-21s %s\n",
3777 debug_args
[i
].arg
, debug_args
[i
].description
);
3780 printf (_(" -aux-info <file> Emit declaration info into <file>.X\n"));
3781 printf (_(" -quiet Do not display functions compiled or elapsed time\n"));
3782 printf (_(" -version Display the compiler's version\n"));
3783 printf (_(" -d[letters] Enable dumps from specific passes of the compiler\n"));
3784 printf (_(" -dumpbase <file> Base name to be used for dumps from specific passes\n"));
3785 #if defined INSN_SCHEDULING
3786 printf (_(" -fsched-verbose=<number> Set the verbosity level of the scheduler\n"));
3788 printf (_(" --help Display this information\n"));
3793 /* Display descriptions of language specific options.
3794 If there is no description, note that there is an undocumented option.
3795 If the description is empty, do not display anything. (This allows
3796 options to be deliberately undocumented, for whatever reason).
3797 If the option string is missing, then this is a marker, indicating
3798 that the description string is in fact the name of a language, whose
3799 language specific options are to follow. */
3801 if (NUM_ELEM (documented_lang_options
) > 1)
3803 printf (_("\nLanguage specific options:\n"));
3805 for (i
= 0; i
< NUM_ELEM (documented_lang_options
); i
++)
3807 const char *description
= documented_lang_options
[i
].description
;
3808 const char *option
= documented_lang_options
[i
].option
;
3810 if (description
== NULL
)
3815 printf (_(" %-23.23s [undocumented]\n"), option
);
3817 else if (*description
== 0)
3819 else if (option
== NULL
)
3823 (_("\nThere are undocumented %s specific options as well.\n"),
3827 printf (_("\n Options for %s:\n"), description
);
3832 printf (" %-23.23s %s\n", option
, description
);
3837 printf (_("\nThere are undocumented %s specific options as well.\n"),
3840 if (NUM_ELEM (target_switches
) > 1
3841 #ifdef TARGET_OPTIONS
3842 || NUM_ELEM (target_options
) > 1
3850 printf (_("\nTarget specific options:\n"));
3852 for (i
= NUM_ELEM (target_switches
); i
--;)
3854 const char *option
= target_switches
[i
].name
;
3855 const char *description
= target_switches
[i
].description
;
3857 if (option
== NULL
|| *option
== 0)
3859 else if (description
== NULL
)
3864 printf (_(" -m%-21.21s [undocumented]\n"), option
);
3866 else if (* description
!= 0)
3867 doc
+= printf (" -m%-21.21s %s\n", option
, description
);
3870 #ifdef TARGET_OPTIONS
3871 for (i
= NUM_ELEM (target_options
); i
--;)
3873 const char *option
= target_options
[i
].prefix
;
3874 const char *description
= target_options
[i
].description
;
3876 if (option
== NULL
|| *option
== 0)
3878 else if (description
== NULL
)
3883 printf (_(" -m%-21.21s [undocumented]\n"), option
);
3885 else if (* description
!= 0)
3886 doc
+= printf (" -m%-21.21s %s\n", option
, description
);
3892 printf (_("\nThere are undocumented target specific options as well.\n"));
3894 printf (_(" They exist, but they are not documented.\n"));
3899 /* Parse a -d... comand line switch. */
3902 decode_d_option (arg
)
3911 for (i
= 0; i
< DFI_MAX
; ++i
)
3912 dump_file
[i
].enabled
= 1;
3921 flag_print_asm_name
= 1;
3924 graph_dump_format
= vcg
;
3927 rtl_dump_and_exit
= 1;
3932 case 'D': /* These are handled by the preprocessor. */
3938 for (i
= 0; i
< DFI_MAX
; ++i
)
3939 if (c
== dump_file
[i
].debug_switch
)
3941 dump_file
[i
].enabled
= 1;
3946 warning ("unrecognized gcc debugging option: %c", c
);
3951 /* Parse a -f... comand line switch. ARG is the value after the -f.
3952 It is safe to access 'ARG - 2' to generate the full switch name.
3953 Return the number of strings consumed. */
3956 decode_f_option (arg
)
3960 const char *option_value
= NULL
;
3962 /* Search for the option in the table of binary f options. */
3963 for (j
= sizeof (f_options
) / sizeof (f_options
[0]); j
--;)
3965 if (!strcmp (arg
, f_options
[j
].string
))
3967 *f_options
[j
].variable
= f_options
[j
].on_value
;
3971 if (arg
[0] == 'n' && arg
[1] == 'o' && arg
[2] == '-'
3972 && ! strcmp (arg
+ 3, f_options
[j
].string
))
3974 *f_options
[j
].variable
= ! f_options
[j
].on_value
;
3979 if ((option_value
= skip_leading_substring (arg
, "inline-limit-"))
3980 || (option_value
= skip_leading_substring (arg
, "inline-limit=")))
3982 read_integral_parameter (option_value
, arg
- 2, inline_max_insns
);
3983 #ifdef INSN_SCHEDULING
3984 else if ((option_value
= skip_leading_substring (arg
, "sched-verbose=")))
3985 fix_sched_param ("verbose", option_value
);
3987 else if ((option_value
= skip_leading_substring (arg
, "fixed-")))
3988 fix_register (option_value
, 1, 1);
3989 else if ((option_value
= skip_leading_substring (arg
, "call-used-")))
3990 fix_register (option_value
, 0, 1);
3991 else if ((option_value
= skip_leading_substring (arg
, "call-saved-")))
3992 fix_register (option_value
, 0, 0);
3993 else if ((option_value
= skip_leading_substring (arg
, "align-loops=")))
3994 align_loops
= read_integral_parameter (option_value
, arg
- 2, align_loops
);
3995 else if ((option_value
= skip_leading_substring (arg
, "align-functions=")))
3997 = read_integral_parameter (option_value
, arg
- 2, align_functions
);
3998 else if ((option_value
= skip_leading_substring (arg
, "align-jumps=")))
3999 align_jumps
= read_integral_parameter (option_value
, arg
- 2, align_jumps
);
4000 else if ((option_value
= skip_leading_substring (arg
, "align-labels=")))
4002 = read_integral_parameter (option_value
, arg
- 2, align_labels
);
4003 else if ((option_value
4004 = skip_leading_substring (arg
, "stack-limit-register=")))
4006 int reg
= decode_reg_name (option_value
);
4008 error ("unrecognized register name `%s'", option_value
);
4010 stack_limit_rtx
= gen_rtx_REG (Pmode
, reg
);
4012 else if ((option_value
4013 = skip_leading_substring (arg
, "stack-limit-symbol=")))
4017 nm
= ggc_alloc_string (option_value
, strlen (option_value
));
4019 nm
= xstrdup (option_value
);
4020 stack_limit_rtx
= gen_rtx_SYMBOL_REF (Pmode
, nm
);
4022 else if ((option_value
4023 = skip_leading_substring (arg
, "message-length=")))
4024 diagnostic_message_length_per_line
=
4025 read_integral_parameter (option_value
, arg
- 2,
4026 diagnostic_message_length_per_line
);
4027 else if ((option_value
4028 = skip_leading_substring (arg
, "diagnostics-show-location=")))
4030 if (!strcmp (option_value
, "once"))
4031 set_message_prefixing_rule (DIAGNOSTICS_SHOW_PREFIX_ONCE
);
4032 else if (!strcmp (option_value
, "every-line"))
4033 set_message_prefixing_rule (DIAGNOSTICS_SHOW_PREFIX_EVERY_LINE
);
4035 error ("Unrecognized option `%s'", arg
- 2);
4037 else if (!strcmp (arg
, "no-stack-limit"))
4038 stack_limit_rtx
= NULL_RTX
;
4039 else if (!strcmp (arg
, "preprocessed"))
4040 /* Recognise this switch but do nothing. This prevents warnings
4041 about an unrecognized switch if cpplib has not been linked in. */
4049 /* Parse a -W... comand line switch. ARG is the value after the -W.
4050 It is safe to access 'ARG - 2' to generate the full switch name.
4051 Return the number of strings consumed. */
4054 decode_W_option (arg
)
4057 const char *option_value
= NULL
;
4060 /* Search for the option in the table of binary W options. */
4062 for (j
= sizeof (W_options
) / sizeof (W_options
[0]); j
--;)
4064 if (!strcmp (arg
, W_options
[j
].string
))
4066 *W_options
[j
].variable
= W_options
[j
].on_value
;
4070 if (arg
[0] == 'n' && arg
[1] == 'o' && arg
[2] == '-'
4071 && ! strcmp (arg
+ 3, W_options
[j
].string
))
4073 *W_options
[j
].variable
= ! W_options
[j
].on_value
;
4078 if ((option_value
= skip_leading_substring (arg
, "id-clash-")))
4080 id_clash_len
= read_integral_parameter (option_value
, arg
- 2, -1);
4082 if (id_clash_len
!= -1)
4085 else if ((option_value
= skip_leading_substring (arg
, "larger-than-")))
4087 larger_than_size
= read_integral_parameter (option_value
, arg
- 2, -1);
4089 if (larger_than_size
!= -1)
4090 warn_larger_than
= 1;
4092 else if (!strcmp (arg
, "unused"))
4096 else if (!strcmp (arg
, "no-unused"))
4106 /* Parse a -g... comand line switch. ARG is the value after the -g.
4107 It is safe to access 'ARG - 2' to generate the full switch name.
4108 Return the number of strings consumed. */
4111 decode_g_option (arg
)
4115 /* A lot of code assumes write_symbols == NO_DEBUG if the
4116 debugging level is 0 (thus -gstabs1 -gstabs0 would lose track
4117 of what debugging type has been selected). This records the
4118 selected type. It is an error to specify more than one
4120 static enum debug_info_type selected_debug_type
= NO_DEBUG
;
4121 /* Non-zero if debugging format has been explicitly set.
4122 -g and -ggdb don't explicitly set the debugging format so
4123 -gdwarf -g3 is equivalent to -gdwarf3. */
4124 static int type_explicitly_set_p
= 0;
4125 /* Indexed by enum debug_info_type. */
4126 static const char *debug_type_names
[] =
4128 "none", "stabs", "coff", "dwarf-1", "dwarf-2", "xcoff"
4131 /* The maximum admissible debug level value. */
4132 static const unsigned max_debug_level
= 3;
4134 /* Look up ARG in the table. */
4135 for (da
= debug_args
; da
->arg
; da
++)
4137 const int da_len
= strlen (da
->arg
);
4139 if (da_len
== 0 || ! strncmp (arg
, da
->arg
, da_len
))
4141 enum debug_info_type type
= da
->debug_type
;
4142 const char *p
= arg
+ da_len
;
4144 if (*p
&& (*p
< '0' || *p
> '9'))
4147 /* A debug flag without a level defaults to level 2.
4148 Note we do not want to call read_integral_parameter
4149 for that case since it will call atoi which
4152 ??? We may want to generalize the interface to
4153 read_integral_parameter to better handle this case
4154 if this case shows up often. */
4156 level
= read_integral_parameter (p
, 0, max_debug_level
+ 1);
4160 if (da_len
> 1 && *p
&& !strncmp (arg
, "dwarf", da_len
))
4162 error ("use -gdwarf -g%d for DWARF v1, level %d",
4165 error ("use -gdwarf-2 for DWARF v2");
4168 if (level
> max_debug_level
)
4171 ignoring option `%s' due to invalid debug level specification",
4173 level
= debug_info_level
;
4176 if (type
== NO_DEBUG
)
4178 type
= PREFERRED_DEBUGGING_TYPE
;
4180 if (da_len
> 1 && strncmp (arg
, "gdb", da_len
) == 0)
4182 #if defined (DWARF2_DEBUGGING_INFO) && !defined (LINKER_DOES_NOT_WORK_WITH_DWARF2)
4183 type
= DWARF2_DEBUG
;
4185 #ifdef DBX_DEBUGGING_INFO
4192 if (type
== NO_DEBUG
)
4193 warning ("`%s': unknown or unsupported -g option", arg
- 2);
4195 /* Does it conflict with an already selected type? */
4196 if (type_explicitly_set_p
4197 /* -g/-ggdb don't conflict with anything. */
4198 && da
->debug_type
!= NO_DEBUG
4199 && type
!= selected_debug_type
)
4200 warning ("`%s' ignored, conflicts with `-g%s'",
4201 arg
- 2, debug_type_names
[(int) selected_debug_type
]);
4204 /* If the format has already been set, -g/-ggdb
4205 only change the debug level. */
4206 if (type_explicitly_set_p
&& da
->debug_type
== NO_DEBUG
)
4207 /* Don't change debugging type. */
4211 selected_debug_type
= type
;
4212 type_explicitly_set_p
= da
->debug_type
!= NO_DEBUG
;
4215 write_symbols
= (level
== 0
4217 : selected_debug_type
);
4218 use_gnu_debug_info_extensions
= da
->use_extensions_p
;
4219 debug_info_level
= (enum debug_info_level
) level
;
4227 warning ("`%s': unknown or unsupported -g option", arg
- 2);
4232 /* Decode the first argument in the argv as a language-independent option.
4233 Return the number of strings consumed. */
4236 independent_decode_option (argc
, argv
)
4240 char *arg
= argv
[0];
4242 if (arg
[0] != '-' || arg
[1] == 0)
4254 if (!strcmp (arg
, "-help"))
4269 /* Already been treated in main (). Do nothing. */
4273 set_target_switch (arg
+ 1);
4277 return decode_f_option (arg
+ 1);
4280 return decode_g_option (arg
+ 1);
4283 if (!strcmp (arg
, "dumpbase"))
4288 dump_base_name
= argv
[1];
4292 decode_d_option (arg
+ 1);
4296 if (!strcmp (arg
, "pedantic"))
4298 else if (!strcmp (arg
, "pedantic-errors"))
4299 flag_pedantic_errors
= pedantic
= 1;
4300 else if (arg
[1] == 0)
4307 if (!strcmp (arg
, "quiet"))
4314 if (!strcmp (arg
, "version"))
4322 inhibit_warnings
= 1;
4331 /* We save the value of warn_uninitialized, since if they put
4332 -Wuninitialized on the command line, we need to generate a
4333 warning about not using it without also specifying -O. */
4334 if (warn_uninitialized
!= 1)
4335 warn_uninitialized
= 2;
4338 return decode_W_option (arg
+ 1);
4344 #if !defined (BLOCK_PROFILER) || !defined (FUNCTION_BLOCK_PROFILER)
4345 warning ("`-a' option (basic block profile) not supported");
4347 profile_block_flag
= (profile_block_flag
< 2) ? 1 : 3;
4350 else if (!strcmp (arg
, "ax"))
4352 #if !defined (FUNCTION_BLOCK_PROFILER_EXIT) || !defined (BLOCK_PROFILER) || !defined (FUNCTION_BLOCK_PROFILER)
4353 warning ("`-ax' option (jump profiling) not supported");
4355 profile_block_flag
= (!profile_block_flag
4356 || profile_block_flag
== 2) ? 2 : 3;
4359 else if (!strncmp (arg
, "aux-info", 8))
4361 flag_gen_aux_info
= 1;
4367 aux_info_file_name
= argv
[1];
4371 aux_info_file_name
= arg
+ 8;
4383 asm_file_name
= argv
[1];
4398 g_switch_val
= read_integral_parameter (argv
[1], 0, -1);
4403 g_switch_val
= read_integral_parameter (arg
+ 1, 0, -1);
4407 if (g_switch_val
== -1)
4411 g_switch_set
= TRUE
;
4412 g_switch_value
= g_switch_val
;
4422 /* Entry point of cc1/c++. Decode command args, then call compile_file.
4423 Exit code is 35 if can't open files, 34 if fatal error,
4424 33 if had nonfatal errors, else success. */
4426 extern int main
PARAMS ((int, char **));
4436 /* save in case md file wants to emit args as a comment. */
4440 p
= argv
[0] + strlen (argv
[0]);
4441 while (p
!= argv
[0] && !IS_DIR_SEPARATOR (p
[-1]))
4445 #ifdef HAVE_LC_MESSAGES
4446 setlocale (LC_MESSAGES
, "");
4448 (void) bindtextdomain (PACKAGE
, localedir
);
4449 (void) textdomain (PACKAGE
);
4451 /* Install handler for SIGFPE, which may be received while we do
4452 compile-time floating point arithmetic. */
4453 signal (SIGFPE
, float_signal
);
4455 /* Trap fatal signals, e.g. SIGSEGV, and convert them to ICE messages. */
4457 signal (SIGSEGV
, crash_signal
);
4460 signal (SIGILL
, crash_signal
);
4463 signal (SIGBUS
, crash_signal
);
4466 signal (SIGABRT
, crash_signal
);
4468 #if defined SIGIOT && (!defined SIGABRT || SIGABRT != SIGIOT)
4469 signal (SIGIOT
, crash_signal
);
4472 decl_printable_name
= decl_name
;
4473 lang_expand_expr
= (lang_expand_expr_t
) do_abort
;
4475 /* Initialize whether `char' is signed. */
4476 flag_signed_char
= DEFAULT_SIGNED_CHAR
;
4477 #ifdef DEFAULT_SHORT_ENUMS
4478 /* Initialize how much space enums occupy, by default. */
4479 flag_short_enums
= DEFAULT_SHORT_ENUMS
;
4482 /* Initialize the garbage-collector. */
4484 ggc_add_root (&input_file_stack
, 1, sizeof input_file_stack
,
4486 ggc_add_rtx_root (&stack_limit_rtx
, 1);
4487 ggc_add_tree_root (¤t_function_decl
, 1);
4488 ggc_add_tree_root (¤t_function_func_begin_label
, 1);
4490 /* Initialize the diagnostics reporting machinery. */
4491 initialize_diagnostics ();
4493 /* Perform language-specific options intialization. */
4494 lang_init_options ();
4496 /* Scan to see what optimization level has been specified. That will
4497 determine the default value of many flags. */
4498 for (i
= 1; i
< argc
; i
++)
4500 if (!strcmp (argv
[i
], "-O"))
4505 else if (argv
[i
][0] == '-' && argv
[i
][1] == 'O')
4507 /* Handle -Os, -O2, -O3, -O69, ... */
4508 char *p
= &argv
[i
][2];
4510 if ((p
[0] == 's') && (p
[1] == 0))
4514 /* Optimizing for size forces optimize to be 2. */
4519 const int optimize_val
= read_integral_parameter (p
, p
- 2, -1);
4520 if (optimize_val
!= -1)
4522 optimize
= optimize_val
;
4532 flag_thread_jumps
= 1;
4534 flag_delayed_branch
= 1;
4536 #ifdef CAN_DEBUG_WITHOUT_FP
4537 flag_omit_frame_pointer
= 1;
4543 flag_optimize_sibling_calls
= 1;
4544 flag_cse_follow_jumps
= 1;
4545 flag_cse_skip_blocks
= 1;
4547 flag_expensive_optimizations
= 1;
4548 flag_strength_reduce
= 1;
4549 flag_rerun_cse_after_loop
= 1;
4550 flag_rerun_loop_opt
= 1;
4551 flag_caller_saves
= 1;
4554 #ifdef INSN_SCHEDULING
4555 flag_schedule_insns
= 1;
4556 flag_schedule_insns_after_reload
= 1;
4559 flag_strict_aliasing
= 1;
4560 flag_delete_null_pointer_checks
= 1;
4565 flag_inline_functions
= 1;
4568 if (optimize
< 2 || optimize_size
)
4573 align_functions
= 1;
4576 /* Initialize target_flags before OPTIMIZATION_OPTIONS so the latter can
4579 set_target_switch ("");
4581 /* Unwind tables are always present in an ABI-conformant IA-64
4582 object file, so the default should be ON. */
4583 #ifdef IA64_UNWIND_INFO
4584 flag_unwind_tables
= IA64_UNWIND_INFO
;
4587 #ifdef OPTIMIZATION_OPTIONS
4588 /* Allow default optimizations to be specified on a per-machine basis. */
4589 OPTIMIZATION_OPTIONS (optimize
, optimize_size
);
4592 /* Initialize register usage now so switches may override. */
4595 /* Perform normal command line switch decoding. */
4596 for (i
= 1; i
< argc
;)
4598 unsigned int lang_processed
;
4599 unsigned int indep_processed
;
4601 /* Give the language a chance to decode the option for itself. */
4602 lang_processed
= lang_decode_option (argc
- i
, argv
+ i
);
4604 /* Now see if the option also has a language independent meaning.
4605 Some options are both language specific and language independent,
4607 indep_processed
= independent_decode_option (argc
- i
, argv
+ i
);
4609 if (lang_processed
|| indep_processed
)
4610 i
+= (lang_processed
> indep_processed
4611 ? lang_processed
: indep_processed
);
4614 const char *option
= NULL
;
4615 const char *lang
= NULL
;
4618 /* It is possible that the command line switch is not valid for the
4619 current language, but it is valid for another language. In order
4620 to be compatible with previous versions of the compiler (which
4621 did not issue an error message in this case) we check for this
4622 possibility here. If we do find a match, then if extra_warnings
4623 is set we generate a warning message, otherwise we will just
4624 ignore the option. */
4625 for (j
= 0; j
< NUM_ELEM (documented_lang_options
); j
++)
4627 option
= documented_lang_options
[j
].option
;
4630 lang
= documented_lang_options
[j
].description
;
4631 else if (! strncmp (argv
[i
], option
, strlen (option
)))
4635 if (j
!= NUM_ELEM (documented_lang_options
))
4639 warning ("Ignoring command line option '%s'", argv
[i
]);
4642 (It is valid for %s but not the selected language)", lang
);
4646 error ("Unrecognized option `%s'", argv
[i
]);
4652 /* Reflect any language-specific diagnostic option setting. */
4653 reshape_diagnostic_buffer ();
4655 /* Checker uses the frame pointer. */
4656 if (flag_check_memory_usage
)
4657 flag_omit_frame_pointer
= 0;
4661 /* Inlining does not work if not optimizing,
4662 so force it not to be done. */
4666 /* The c_decode_option and lang_decode_option functions set
4667 this to `2' if -Wall is used, so we can avoid giving out
4668 lots of errors for people who don't realize what -Wall does. */
4669 if (warn_uninitialized
== 1)
4670 warning ("-Wuninitialized is not supported without -O");
4673 #ifdef OVERRIDE_OPTIONS
4674 /* Some machines may reject certain combinations of options. */
4678 if (exceptions_via_longjmp
== 2)
4680 #ifdef DWARF2_UNWIND_INFO
4681 exceptions_via_longjmp
= ! DWARF2_UNWIND_INFO
;
4683 #ifdef IA64_UNWIND_INFO
4684 exceptions_via_longjmp
= ! IA64_UNWIND_INFO
;
4686 exceptions_via_longjmp
= 1;
4691 /* Since each function gets its own handler data, we can't support the
4692 new model currently, since it depend on a specific rethrow label
4693 which is declared at the front of the table, and we can only
4694 have one such symbol in a file. */
4695 #ifdef IA64_UNWIND_INFO
4696 flag_new_exceptions
= 0;
4699 /* Set up the align_*_log variables, defaulting them to 1 if they
4700 were still unset. */
4701 if (align_loops
<= 0) align_loops
= 1;
4702 align_loops_log
= floor_log2 (align_loops
* 2 - 1);
4703 if (align_jumps
<= 0) align_jumps
= 1;
4704 align_jumps_log
= floor_log2 (align_jumps
* 2 - 1);
4705 if (align_labels
<= 0) align_labels
= 1;
4706 align_labels_log
= floor_log2 (align_labels
* 2 - 1);
4707 if (align_functions
<= 0) align_functions
= 1;
4708 align_functions_log
= floor_log2 (align_functions
* 2 - 1);
4710 if (profile_block_flag
== 3)
4712 warning ("`-ax' and `-a' are conflicting options. `-a' ignored.");
4713 profile_block_flag
= 2;
4716 /* Unrolling all loops implies that standard loop unrolling must also
4718 if (flag_unroll_all_loops
)
4719 flag_unroll_loops
= 1;
4720 /* Loop unrolling requires that strength_reduction be on also. Silently
4721 turn on strength reduction here if it isn't already on. Also, the loop
4722 unrolling code assumes that cse will be run after loop, so that must
4723 be turned on also. */
4724 if (flag_unroll_loops
)
4726 flag_strength_reduce
= 1;
4727 flag_rerun_cse_after_loop
= 1;
4730 /* Warn about options that are not supported on this machine. */
4731 #ifndef INSN_SCHEDULING
4732 if (flag_schedule_insns
|| flag_schedule_insns_after_reload
)
4733 warning ("instruction scheduling not supported on this target machine");
4736 if (flag_delayed_branch
)
4737 warning ("this target machine does not have delayed branches");
4740 user_label_prefix
= USER_LABEL_PREFIX
;
4741 if (flag_leading_underscore
!= -1)
4743 /* If the default prefix is more complicated than "" or "_",
4744 issue a warning and ignore this option. */
4745 if (user_label_prefix
[0] == 0 ||
4746 (user_label_prefix
[0] == '_' && user_label_prefix
[1] == 0))
4748 user_label_prefix
= flag_leading_underscore
? "_" : "";
4751 warning ("-f%sleading-underscore not supported on this target machine",
4752 flag_leading_underscore
? "" : "no-");
4755 /* If we are in verbose mode, write out the version and maybe all the
4756 option flags in use. */
4759 print_version (stderr
, "");
4761 print_switch_values (stderr
, 0, MAX_LINE
, "", " ", "\n");
4764 compile_file (filename
);
4766 #if !defined(OS2) && !defined(VMS) && (!defined(_WIN32) || defined (__CYGWIN__)) && !defined(__INTERIX)
4769 char *lim
= (char *) sbrk (0);
4771 fnotice (stderr
, "Data size %ld.\n", (long) (lim
- (char *) &environ
));
4776 system ("ps -l 1>&2");
4779 #endif /* not USG */
4782 #endif /* ! OS2 && ! VMS && (! _WIN32 || CYGWIN) && ! __INTERIX */
4785 return (FATAL_EXIT_CODE
);
4787 return (FATAL_EXIT_CODE
);
4788 return (SUCCESS_EXIT_CODE
);
4791 /* Decode -m switches. */
4792 /* Decode the switch -mNAME. */
4795 set_target_switch (name
)
4799 int valid_target_option
= 0;
4801 for (j
= 0; j
< sizeof target_switches
/ sizeof target_switches
[0]; j
++)
4802 if (!strcmp (target_switches
[j
].name
, name
))
4804 if (target_switches
[j
].value
< 0)
4805 target_flags
&= ~-target_switches
[j
].value
;
4807 target_flags
|= target_switches
[j
].value
;
4808 valid_target_option
= 1;
4811 #ifdef TARGET_OPTIONS
4812 if (!valid_target_option
)
4813 for (j
= 0; j
< sizeof target_options
/ sizeof target_options
[0]; j
++)
4815 int len
= strlen (target_options
[j
].prefix
);
4816 if (!strncmp (target_options
[j
].prefix
, name
, len
))
4818 *target_options
[j
].variable
= name
+ len
;
4819 valid_target_option
= 1;
4824 if (!valid_target_option
)
4825 error ("Invalid option `%s'", name
);
4828 /* Print version information to FILE.
4829 Each line begins with INDENT (for the case where FILE is the
4830 assembler output file). */
4833 print_version (file
, indent
)
4838 #define __VERSION__ "[?]"
4842 "%s%s%s version %s (%s) compiled by GNU C version %s.\n"
4844 "%s%s%s version %s (%s) compiled by CC.\n"
4846 , indent
, *indent
!= 0 ? " " : "",
4847 language_string
, version_string
, TARGET_NAME
, __VERSION__
);
4850 /* Print an option value and return the adjusted position in the line.
4851 ??? We don't handle error returns from fprintf (disk full); presumably
4852 other code will catch a disk full though. */
4855 print_single_switch (file
, pos
, max
, indent
, sep
, term
, type
, name
)
4858 const char *indent
, *sep
, *term
, *type
, *name
;
4860 /* The ultrix fprintf returns 0 on success, so compute the result we want
4861 here since we need it for the following test. */
4862 int len
= strlen (sep
) + strlen (type
) + strlen (name
);
4867 fprintf (file
, "%s", term
);
4872 fprintf (file
, "%s", indent
);
4873 pos
= strlen (indent
);
4875 fprintf (file
, "%s%s%s", sep
, type
, name
);
4880 /* Print active target switches to FILE.
4881 POS is the current cursor position and MAX is the size of a "line".
4882 Each line begins with INDENT and ends with TERM.
4883 Each switch is separated from the next by SEP. */
4886 print_switch_values (file
, pos
, max
, indent
, sep
, term
)
4889 const char *indent
, *sep
, *term
;
4894 /* Print the options as passed. */
4896 pos
= print_single_switch (file
, pos
, max
, indent
, *indent
? " " : "", term
,
4897 _("options passed: "), "");
4899 for (p
= &save_argv
[1]; *p
!= NULL
; p
++)
4903 if (strcmp (*p
, "-o") == 0)
4909 if (strcmp (*p
, "-quiet") == 0)
4911 if (strcmp (*p
, "-version") == 0)
4916 pos
= print_single_switch (file
, pos
, max
, indent
, sep
, term
, *p
, "");
4919 fprintf (file
, "%s", term
);
4921 /* Print the -f and -m options that have been enabled.
4922 We don't handle language specific options but printing argv
4925 pos
= print_single_switch (file
, 0, max
, indent
, *indent
? " " : "", term
,
4926 _("options enabled: "), "");
4928 for (j
= 0; j
< sizeof f_options
/ sizeof f_options
[0]; j
++)
4929 if (*f_options
[j
].variable
== f_options
[j
].on_value
)
4930 pos
= print_single_switch (file
, pos
, max
, indent
, sep
, term
,
4931 "-f", f_options
[j
].string
);
4933 /* Print target specific options. */
4935 for (j
= 0; j
< sizeof target_switches
/ sizeof target_switches
[0]; j
++)
4936 if (target_switches
[j
].name
[0] != '\0'
4937 && target_switches
[j
].value
> 0
4938 && ((target_switches
[j
].value
& target_flags
)
4939 == target_switches
[j
].value
))
4941 pos
= print_single_switch (file
, pos
, max
, indent
, sep
, term
,
4942 "-m", target_switches
[j
].name
);
4945 #ifdef TARGET_OPTIONS
4946 for (j
= 0; j
< sizeof target_options
/ sizeof target_options
[0]; j
++)
4947 if (*target_options
[j
].variable
!= NULL
)
4950 sprintf (prefix
, "-m%s", target_options
[j
].prefix
);
4951 pos
= print_single_switch (file
, pos
, max
, indent
, sep
, term
,
4952 prefix
, *target_options
[j
].variable
);
4956 fprintf (file
, "%s", term
);
4959 /* Record the beginning of a new source file, named FILENAME. */
4962 debug_start_source_file (filename
)
4963 register const char *filename ATTRIBUTE_UNUSED
;
4965 #ifdef DBX_DEBUGGING_INFO
4966 if (write_symbols
== DBX_DEBUG
)
4967 dbxout_start_new_source_file (filename
);
4969 #ifdef DWARF_DEBUGGING_INFO
4970 if (debug_info_level
== DINFO_LEVEL_VERBOSE
4971 && write_symbols
== DWARF_DEBUG
)
4972 dwarfout_start_new_source_file (filename
);
4973 #endif /* DWARF_DEBUGGING_INFO */
4974 #ifdef DWARF2_DEBUGGING_INFO
4975 if (debug_info_level
== DINFO_LEVEL_VERBOSE
4976 && write_symbols
== DWARF2_DEBUG
)
4977 dwarf2out_start_source_file (filename
);
4978 #endif /* DWARF2_DEBUGGING_INFO */
4979 #ifdef SDB_DEBUGGING_INFO
4980 if (write_symbols
== SDB_DEBUG
)
4981 sdbout_start_new_source_file (filename
);
4985 /* Record the resumption of a source file. LINENO is the line number in
4986 the source file we are returning to. */
4989 debug_end_source_file (lineno
)
4990 register unsigned lineno ATTRIBUTE_UNUSED
;
4992 #ifdef DBX_DEBUGGING_INFO
4993 if (write_symbols
== DBX_DEBUG
)
4994 dbxout_resume_previous_source_file ();
4996 #ifdef DWARF_DEBUGGING_INFO
4997 if (debug_info_level
== DINFO_LEVEL_VERBOSE
4998 && write_symbols
== DWARF_DEBUG
)
4999 dwarfout_resume_previous_source_file (lineno
);
5000 #endif /* DWARF_DEBUGGING_INFO */
5001 #ifdef DWARF2_DEBUGGING_INFO
5002 if (debug_info_level
== DINFO_LEVEL_VERBOSE
5003 && write_symbols
== DWARF2_DEBUG
)
5004 dwarf2out_end_source_file ();
5005 #endif /* DWARF2_DEBUGGING_INFO */
5006 #ifdef SDB_DEBUGGING_INFO
5007 if (write_symbols
== SDB_DEBUG
)
5008 sdbout_resume_previous_source_file ();
5012 /* Called from check_newline in c-parse.y. The `buffer' parameter contains
5013 the tail part of the directive line, i.e. the part which is past the
5014 initial whitespace, #, whitespace, directive-name, whitespace part. */
5017 debug_define (lineno
, buffer
)
5018 register unsigned lineno ATTRIBUTE_UNUSED
;
5019 register char *buffer ATTRIBUTE_UNUSED
;
5021 #ifdef DWARF_DEBUGGING_INFO
5022 if (debug_info_level
== DINFO_LEVEL_VERBOSE
5023 && write_symbols
== DWARF_DEBUG
)
5024 dwarfout_define (lineno
, buffer
);
5025 #endif /* DWARF_DEBUGGING_INFO */
5026 #ifdef DWARF2_DEBUGGING_INFO
5027 if (debug_info_level
== DINFO_LEVEL_VERBOSE
5028 && write_symbols
== DWARF2_DEBUG
)
5029 dwarf2out_define (lineno
, buffer
);
5030 #endif /* DWARF2_DEBUGGING_INFO */
5033 /* Called from check_newline in c-parse.y. The `buffer' parameter contains
5034 the tail part of the directive line, i.e. the part which is past the
5035 initial whitespace, #, whitespace, directive-name, whitespace part. */
5038 debug_undef (lineno
, buffer
)
5039 register unsigned lineno ATTRIBUTE_UNUSED
;
5040 register char *buffer ATTRIBUTE_UNUSED
;
5042 #ifdef DWARF_DEBUGGING_INFO
5043 if (debug_info_level
== DINFO_LEVEL_VERBOSE
5044 && write_symbols
== DWARF_DEBUG
)
5045 dwarfout_undef (lineno
, buffer
);
5046 #endif /* DWARF_DEBUGGING_INFO */
5047 #ifdef DWARF2_DEBUGGING_INFO
5048 if (debug_info_level
== DINFO_LEVEL_VERBOSE
5049 && write_symbols
== DWARF2_DEBUG
)
5050 dwarf2out_undef (lineno
, buffer
);
5051 #endif /* DWARF2_DEBUGGING_INFO */
5054 /* Returns nonzero if it is appropriate not to emit any debugging
5055 information for BLOCK, because it doesn't contain any instructions.
5056 This may not be the case for blocks containing nested functions, since
5057 we may actually call such a function even though the BLOCK information
5061 debug_ignore_block (block
)
5062 tree block ATTRIBUTE_UNUSED
;
5064 /* Never delete the BLOCK for the outermost scope
5065 of the function; we can refer to names from
5066 that scope even if the block notes are messed up. */
5067 if (is_body_block (block
))
5070 #ifdef DWARF2_DEBUGGING_INFO
5071 if (write_symbols
== DWARF2_DEBUG
)
5072 return dwarf2out_ignore_block (block
);