1 /* Top level of GNU C compiler
2 Copyright (C) 1987, 1988, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
3 1999, 2000 Free Software Foundation, Inc.
5 This file is part of GNU CC.
7 GNU CC is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
12 GNU CC is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GNU CC; see the file COPYING. If not, write to
19 the Free Software Foundation, 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
22 /* This is the top level of cc1/c++.
23 It parses command args, opens files, invokes the various passes
24 in the proper order, and counts the time used by each.
25 Error messages and low-level interface to malloc also handled here. */
28 #undef FLOAT /* This is for hpux. They should change hpux. */
29 #undef FFS /* Some systems define this in param.h. */
34 #ifdef HAVE_SYS_RESOURCE_H
35 # include <sys/resource.h>
38 #ifdef HAVE_SYS_TIMES_H
39 # include <sys/times.h>
47 #include "insn-attr.h"
48 #include "insn-codes.h"
49 #include "insn-config.h"
50 #include "hard-reg-set.h"
58 #include "basic-block.h"
65 #include "diagnostic.h"
68 #ifndef ACCUMULATE_OUTGOING_ARGS
69 #define ACCUMULATE_OUTGOING_ARGS 0
72 #ifdef DWARF_DEBUGGING_INFO
76 #if defined (DWARF2_UNWIND_INFO) || defined (DWARF2_DEBUGGING_INFO)
77 #include "dwarf2out.h"
80 #if defined(DBX_DEBUGGING_INFO) || defined(XCOFF_DEBUGGING_INFO)
84 #ifdef SDB_DEBUGGING_INFO
88 #ifdef XCOFF_DEBUGGING_INFO
93 /* The extra parameters substantially improve the I/O performance. */
96 vms_fopen (fname
, type
)
100 /* The <stdio.h> in the gcc-vms-1.42 distribution prototypes fopen with two
101 fixed arguments, which matches ANSI's specification but not VAXCRTL's
102 pre-ANSI implementation. This hack circumvents the mismatch problem. */
103 FILE *(*vmslib_fopen
)() = (FILE *(*)()) fopen
;
106 return (*vmslib_fopen
) (fname
, type
, "mbc=32",
107 "deq=64", "fop=tef", "shr=nil");
109 return (*vmslib_fopen
) (fname
, type
, "mbc=32");
112 #define fopen vms_fopen
115 #ifndef DEFAULT_GDB_EXTENSIONS
116 #define DEFAULT_GDB_EXTENSIONS 1
119 /* If more than one debugging type is supported, you must define
120 PREFERRED_DEBUGGING_TYPE to choose a format in a system-dependent way.
122 This is one long line cause VAXC can't handle a \-newline. */
123 #if 1 < (defined (DBX_DEBUGGING_INFO) + defined (SDB_DEBUGGING_INFO) + defined (DWARF_DEBUGGING_INFO) + defined (DWARF2_DEBUGGING_INFO) + defined (XCOFF_DEBUGGING_INFO))
124 #ifndef PREFERRED_DEBUGGING_TYPE
125 You Lose
! You must define PREFERRED_DEBUGGING_TYPE
!
126 #endif /* no PREFERRED_DEBUGGING_TYPE */
127 #else /* Only one debugging format supported. Define PREFERRED_DEBUGGING_TYPE
128 so the following code needn't care. */
129 #ifdef DBX_DEBUGGING_INFO
130 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
132 #ifdef SDB_DEBUGGING_INFO
133 #define PREFERRED_DEBUGGING_TYPE SDB_DEBUG
135 #ifdef DWARF_DEBUGGING_INFO
136 #define PREFERRED_DEBUGGING_TYPE DWARF_DEBUG
138 #ifdef DWARF2_DEBUGGING_INFO
139 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
141 #ifdef XCOFF_DEBUGGING_INFO
142 #define PREFERRED_DEBUGGING_TYPE XCOFF_DEBUG
144 #endif /* More than one debugger format enabled. */
146 /* If still not defined, must have been because no debugging formats
148 #ifndef PREFERRED_DEBUGGING_TYPE
149 #define PREFERRED_DEBUGGING_TYPE NO_DEBUG
152 #if defined (HAVE_DECL_ENVIRON) && !HAVE_DECL_ENVIRON
153 extern char **environ
;
156 /* Carry information from ASM_DECLARE_OBJECT_NAME
157 to ASM_FINISH_DECLARE_OBJECT. */
159 extern int size_directive_output
;
160 extern tree last_assemble_variable_decl
;
162 static void set_target_switch
PARAMS ((const char *));
163 static const char *decl_name
PARAMS ((tree
, int));
165 static void float_signal
PARAMS ((int)) ATTRIBUTE_NORETURN
;
166 static void crash_signal
PARAMS ((int)) ATTRIBUTE_NORETURN
;
167 #ifdef ASM_IDENTIFY_LANGUAGE
168 /* This might or might not be used in ASM_IDENTIFY_LANGUAGE. */
169 static void output_lang_identify
PARAMS ((FILE *)) ATTRIBUTE_UNUSED
;
171 static void compile_file
PARAMS ((const char *));
172 static void display_help
PARAMS ((void));
173 static void mark_file_stack
PARAMS ((void *));
175 static void decode_d_option
PARAMS ((const char *));
176 static int decode_f_option
PARAMS ((const char *));
177 static int decode_W_option
PARAMS ((const char *));
178 static int decode_g_option
PARAMS ((const char *));
179 static unsigned int independent_decode_option
PARAMS ((int, char **));
181 static void print_version
PARAMS ((FILE *, const char *));
182 static int print_single_switch
PARAMS ((FILE *, int, int, const char *,
183 const char *, const char *,
184 const char *, const char *));
185 static void print_switch_values
PARAMS ((FILE *, int, int, const char *,
186 const char *, const char *));
188 /* Length of line when printing switch values. */
191 /* Name of program invoked, sans directories. */
193 const char *progname
;
195 /* Copy of arguments to main. */
199 /* Name of current original source file (what was input to cpp).
200 This comes from each #-command in the actual input. */
202 const char *input_filename
;
204 /* Name of top-level original source file (what was input to cpp).
205 This comes from the #-command at the beginning of the actual input.
206 If there isn't any there, then this is the cc1 input file name. */
208 const char *main_input_filename
;
210 /* Current line number in real source file. */
214 /* Nonzero if it is unsafe to create any new pseudo registers. */
217 /* Stack of currently pending input files. */
219 struct file_stack
*input_file_stack
;
221 /* Incremented on each change to input_file_stack. */
222 int input_file_stack_tick
;
224 /* Name to use as base of names for dump output files. */
226 const char *dump_base_name
;
228 /* Bit flags that specify the machine subtype we are compiling for.
229 Bits are tested using macros TARGET_... defined in the tm.h file
230 and set by `-m...' switches. Must be defined in rtlanal.c. */
232 extern int target_flags
;
234 /* Describes a dump file. */
236 struct dump_file_info
238 /* The unique extension to apply, e.g. ".jump". */
239 const char *const extension
;
241 /* The -d<c> character that enables this dump file. */
242 char const debug_switch
;
244 /* True if there is a corresponding graph dump file. */
245 char const graph_dump_p
;
247 /* True if the user selected this dump. */
250 /* True if the files have been initialized (ie truncated). */
254 /* Enumerate the extant dump files. */
291 /* Describes all the dump files. Should be kept in order of the
292 pass and in sync with dump_file_index above.
294 Remaining -d letters:
300 struct dump_file_info dump_file
[DFI_MAX
] =
302 { "rtl", 'r', 0, 0, 0 },
303 { "sibling", 'i', 0, 0, 0 },
304 { "jump", 'j', 0, 0, 0 },
305 { "cse", 's', 0, 0, 0 },
306 { "addressof", 'F', 0, 0, 0 },
307 { "ssa", 'e', 1, 0, 0 },
308 { "dce", 'X', 1, 0, 0 },
309 { "ussa", 'e', 1, 0, 0 }, /* Yes, duplicate enable switch. */
310 { "gcse", 'G', 1, 0, 0 },
311 { "loop", 'L', 1, 0, 0 },
312 { "cse2", 't', 1, 0, 0 },
313 { "cfg", 'f', 1, 0, 0 },
314 { "bp", 'b', 1, 0, 0 },
315 { "life", 'f', 1, 0, 0 }, /* Yes, duplicate enable switch. */
316 { "combine", 'c', 1, 0, 0 },
317 { "ce", 'C', 1, 0, 0 },
318 { "regmove", 'N', 1, 0, 0 },
319 { "sched", 'S', 1, 0, 0 },
320 { "lreg", 'l', 1, 0, 0 },
321 { "greg", 'g', 1, 0, 0 },
322 { "flow2", 'w', 1, 0, 0 },
323 { "ce2", 'E', 1, 0, 0 },
324 { "peephole2", 'z', 1, 0, 0 },
325 { "rnreg", 'n', 1, 0, 0 },
326 { "sched2", 'R', 1, 0, 0 },
327 { "bbro", 'B', 1, 0, 0 },
328 { "jump2", 'J', 1, 0, 0 },
329 { "mach", 'M', 1, 0, 0 },
330 { "dbr", 'd', 0, 0, 0 },
331 { "stack", 'k', 1, 0, 0 },
334 static int open_dump_file
PARAMS ((enum dump_file_index
, tree
));
335 static void close_dump_file
PARAMS ((enum dump_file_index
,
336 void (*) (FILE *, rtx
), rtx
));
338 /* Other flags saying which kinds of debugging dump have been requested. */
340 int rtl_dump_and_exit
;
341 int flag_print_asm_name
;
342 static int flag_print_mem
;
343 static int version_flag
;
344 static char *filename
;
345 enum graph_dump_types graph_dump_format
;
347 /* Name for output file of assembly code, specified with -o. */
351 /* Value of the -G xx switch, and whether it was passed or not. */
355 /* Type(s) of debugging information we are producing (if any).
356 See flags.h for the definitions of the different possible
357 types of debugging information. */
358 enum debug_info_type write_symbols
= NO_DEBUG
;
360 /* Level of debugging information we are producing. See flags.h
361 for the definitions of the different possible levels. */
362 enum debug_info_level debug_info_level
= DINFO_LEVEL_NONE
;
364 /* Nonzero means use GNU-only extensions in the generated symbolic
365 debugging information. */
366 /* Currently, this only has an effect when write_symbols is set to
367 DBX_DEBUG, XCOFF_DEBUG, or DWARF_DEBUG. */
368 int use_gnu_debug_info_extensions
= 0;
370 /* Nonzero means do optimizations. -O.
371 Particular numeric values stand for particular amounts of optimization;
372 thus, -O2 stores 2 here. However, the optimizations beyond the basic
373 ones are not controlled directly by this variable. Instead, they are
374 controlled by individual `flag_...' variables that are defaulted
375 based on this variable. */
379 /* Nonzero means optimize for size. -Os.
380 The only valid values are zero and non-zero. When optimize_size is
381 non-zero, optimize defaults to 2, but certain individual code
382 bloating optimizations are disabled. */
384 int optimize_size
= 0;
386 /* Number of error messages and warning messages so far. */
389 int warningcount
= 0;
392 /* The FUNCTION_DECL for the function currently being compiled,
393 or 0 if between functions. */
394 tree current_function_decl
;
396 /* Set to the FUNC_BEGIN label of the current function, or NULL_TREE
398 tree current_function_func_begin_label
;
400 /* Pointer to function to compute the name to use to print a declaration.
401 DECL is the declaration in question.
402 VERBOSITY determines what information will be printed:
403 0: DECL_NAME, demangled as necessary.
404 1: and scope information.
405 2: and any other information that might be interesting, such as function
406 parameter types in C++. */
408 const char *(*decl_printable_name
) PARAMS ((tree
, int));
410 /* Pointer to function to compute rtl for a language-specific tree code. */
412 typedef rtx (*lang_expand_expr_t
)
413 PARAMS ((union tree_node
*, rtx
, enum machine_mode
,
414 enum expand_modifier modifier
));
416 lang_expand_expr_t lang_expand_expr
= 0;
418 tree (*lang_expand_constant
) PARAMS ((tree
)) = 0;
420 /* Pointer to function to finish handling an incomplete decl at the
421 end of compilation. */
423 void (*incomplete_decl_finalize_hook
) PARAMS ((tree
)) = 0;
425 /* Nonzero if doing dwarf2 duplicate elimination. */
427 int flag_eliminate_dwarf2_dups
= 0;
429 /* Nonzero if generating code to do profiling. */
431 int profile_flag
= 0;
433 /* Nonzero if generating code to do profiling on a line-by-line basis. */
435 int profile_block_flag
;
437 /* Nonzero if generating code to profile program flow graph arcs. */
439 int profile_arc_flag
= 0;
441 /* Nonzero if generating info for gcov to calculate line test coverage. */
443 int flag_test_coverage
= 0;
445 /* Nonzero indicates that branch taken probabilities should be calculated. */
447 int flag_branch_probabilities
= 0;
449 /* Nonzero if basic blocks should be reordered. */
451 int flag_reorder_blocks
= 0;
453 /* Nonzero if registers should be renamed. */
455 int flag_rename_registers
= 0;
457 /* Nonzero for -pedantic switch: warn about anything
458 that standard spec forbids. */
462 /* Temporarily suppress certain warnings.
463 This is set while reading code from a system header file. */
465 int in_system_header
= 0;
467 /* Don't print functions as they are compiled. -quiet. */
471 /* Print times taken by the various passes. -ftime-report. */
475 /* Print memory still in use at end of compilation (which may have little
476 to do with peak memory consumption). -fmem-report. */
480 /* Non-zero means to collect statistics which might be expensive
481 and to print them when we are done. */
482 int flag_detailed_statistics
= 0;
487 /* Nonzero means `char' should be signed. */
489 int flag_signed_char
;
491 /* Nonzero means give an enum type only as many bytes as it needs. */
493 int flag_short_enums
;
495 /* Nonzero for -fcaller-saves: allocate values in regs that need to
496 be saved across function calls, if that produces overall better code.
497 Optional now, so people can test it. */
499 #ifdef DEFAULT_CALLER_SAVES
500 int flag_caller_saves
= 1;
502 int flag_caller_saves
= 0;
505 /* Nonzero if structures and unions should be returned in memory.
507 This should only be defined if compatibility with another compiler or
508 with an ABI is needed, because it results in slower code. */
510 #ifndef DEFAULT_PCC_STRUCT_RETURN
511 #define DEFAULT_PCC_STRUCT_RETURN 1
514 /* Nonzero for -fpcc-struct-return: return values the same way PCC does. */
516 int flag_pcc_struct_return
= DEFAULT_PCC_STRUCT_RETURN
;
518 /* Nonzero for -fforce-mem: load memory value into a register
519 before arithmetic on it. This makes better cse but slower compilation. */
521 int flag_force_mem
= 0;
523 /* Nonzero for -fforce-addr: load memory address into a register before
524 reference to memory. This makes better cse but slower compilation. */
526 int flag_force_addr
= 0;
528 /* Nonzero for -fdefer-pop: don't pop args after each function call;
529 instead save them up to pop many calls' args with one insns. */
531 int flag_defer_pop
= 0;
533 /* Nonzero for -ffloat-store: don't allocate floats and doubles
534 in extended-precision registers. */
536 int flag_float_store
= 0;
538 /* Nonzero for -fcse-follow-jumps:
539 have cse follow jumps to do a more extensive job. */
541 int flag_cse_follow_jumps
;
543 /* Nonzero for -fcse-skip-blocks:
544 have cse follow a branch around a block. */
545 int flag_cse_skip_blocks
;
547 /* Nonzero for -fexpensive-optimizations:
548 perform miscellaneous relatively-expensive optimizations. */
549 int flag_expensive_optimizations
;
551 /* Nonzero for -fthread-jumps:
552 have jump optimize output of loop. */
554 int flag_thread_jumps
;
556 /* Nonzero enables strength-reduction in loop.c. */
558 int flag_strength_reduce
= 0;
560 /* Nonzero enables loop unrolling in unroll.c. Only loops for which the
561 number of iterations can be calculated at compile-time (UNROLL_COMPLETELY,
562 UNROLL_MODULO) or at run-time (preconditioned to be UNROLL_MODULO) are
565 int flag_unroll_loops
;
567 /* Nonzero enables loop unrolling in unroll.c. All loops are unrolled.
568 This is generally not a win. */
570 int flag_unroll_all_loops
;
572 /* Nonzero forces all invariant computations in loops to be moved
575 int flag_move_all_movables
= 0;
577 /* Nonzero forces all general induction variables in loops to be
580 int flag_reduce_all_givs
= 0;
582 /* Nonzero to perform full register move optimization passes. This is the
585 int flag_regmove
= 0;
587 /* Nonzero for -fwritable-strings:
588 store string constants in data segment and don't uniquize them. */
590 int flag_writable_strings
= 0;
592 /* Nonzero means don't put addresses of constant functions in registers.
593 Used for compiling the Unix kernel, where strange substitutions are
594 done on the assembly output. */
596 int flag_no_function_cse
= 0;
598 /* Nonzero for -fomit-frame-pointer:
599 don't make a frame pointer in simple functions that don't require one. */
601 int flag_omit_frame_pointer
= 0;
603 /* Nonzero means place each function into its own section on those platforms
604 which support arbitrary section names and unlimited numbers of sections. */
606 int flag_function_sections
= 0;
608 /* ... and similar for data. */
610 int flag_data_sections
= 0;
612 /* Nonzero to inhibit use of define_optimization peephole opts. */
614 int flag_no_peephole
= 0;
616 /* Nonzero allows GCC to violate some IEEE or ANSI rules regarding math
617 operations in the interest of optimization. For example it allows
618 GCC to assume arguments to sqrt are nonnegative numbers, allowing
619 faster code for sqrt to be generated. */
621 int flag_fast_math
= 0;
623 /* Nonzero allows GCC to optimize sibling and tail recursive calls. */
625 int flag_optimize_sibling_calls
= 0;
627 /* Nonzero means the front end generally wants `errno' maintained by math
628 operations, like built-in SQRT, unless overridden by flag_fast_math. */
630 int flag_errno_math
= 1;
632 /* 0 means straightforward implementation of complex divide acceptable.
633 1 means wide ranges of inputs must work for complex divide.
634 2 means C9X-like requirements for complex divide (not yet implemented). */
636 int flag_complex_divide_method
= 0;
638 /* Nonzero means all references through pointers are volatile. */
642 /* Nonzero means treat all global and extern variables as volatile. */
644 int flag_volatile_global
;
646 /* Nonzero means treat all static variables as volatile. */
648 int flag_volatile_static
;
650 /* Nonzero means just do syntax checking; don't output anything. */
652 int flag_syntax_only
= 0;
654 /* Nonzero means perform global cse. */
656 static int flag_gcse
;
658 /* Nonzero means to use global dataflow analysis to eliminate
659 useless null pointer tests. */
661 static int flag_delete_null_pointer_checks
;
663 /* Nonzero means to rerun cse after loop optimization. This increases
664 compilation time about 20% and picks up a few more common expressions. */
666 static int flag_rerun_cse_after_loop
;
668 /* Nonzero means to run loop optimizations twice. */
670 int flag_rerun_loop_opt
;
672 /* Nonzero for -finline-functions: ok to inline functions that look like
673 good inline candidates. */
675 int flag_inline_functions
;
677 /* Nonzero for -fkeep-inline-functions: even if we make a function
678 go inline everywhere, keep its definition around for debugging
681 int flag_keep_inline_functions
;
683 /* Nonzero means that functions will not be inlined. */
687 /* Nonzero means that we should emit static const variables
688 regardless of whether or not optimization is turned on. */
690 int flag_keep_static_consts
= 1;
692 /* Nonzero means we should be saving declaration info into a .X file. */
694 int flag_gen_aux_info
= 0;
696 /* Specified name of aux-info file. */
698 static char *aux_info_file_name
;
700 /* Nonzero means make the text shared if supported. */
702 int flag_shared_data
;
704 /* Nonzero means schedule into delayed branch slots if supported. */
706 int flag_delayed_branch
;
708 /* Nonzero if we are compiling pure (sharable) code.
709 Value is 1 if we are doing reasonable (i.e. simple
710 offset into offset table) pic. Value is 2 if we can
711 only perform register offsets. */
715 /* Nonzero means generate extra code for exception handling and enable
716 exception handling. */
720 /* Nonzero means use the new model for exception handling. Replaces
721 -DNEW_EH_MODEL as a compile option. */
723 int flag_new_exceptions
= 1;
725 /* Nonzero means generate frame unwind info table when supported. */
727 int flag_unwind_tables
= 0;
729 /* Nonzero means don't place uninitialized global data in common storage
734 /* Nonzero means pretend it is OK to examine bits of target floats,
735 even if that isn't true. The resulting code will have incorrect constants,
736 but the same series of instructions that the native compiler would make. */
738 int flag_pretend_float
;
740 /* Nonzero means change certain warnings into errors.
741 Usually these are warnings about failure to conform to some standard. */
743 int flag_pedantic_errors
= 0;
745 /* flag_schedule_insns means schedule insns within basic blocks (before
747 flag_schedule_insns_after_reload means schedule insns after
750 int flag_schedule_insns
= 0;
751 int flag_schedule_insns_after_reload
= 0;
753 /* The following flags have effect only for scheduling before register
756 flag_schedule_interblock means schedule insns accross basic blocks.
757 flag_schedule_speculative means allow speculative motion of non-load insns.
758 flag_schedule_speculative_load means allow speculative motion of some
760 flag_schedule_speculative_load_dangerous allows speculative motion of more
763 int flag_schedule_interblock
= 1;
764 int flag_schedule_speculative
= 1;
765 int flag_schedule_speculative_load
= 0;
766 int flag_schedule_speculative_load_dangerous
= 0;
768 int flag_single_precision_constant
;
770 /* flag_branch_on_count_reg means try to replace add-1,compare,branch tupple
771 by a cheaper branch on a count register. */
772 int flag_branch_on_count_reg
= 1;
774 /* -finhibit-size-directive inhibits output of .size for ELF.
775 This is used only for compiling crtstuff.c,
776 and it may be extended to other effects
777 needed for crtstuff.c on other systems. */
778 int flag_inhibit_size_directive
= 0;
780 /* -fverbose-asm causes extra commentary information to be produced in
781 the generated assembly code (to make it more readable). This option
782 is generally only of use to those who actually need to read the
783 generated assembly code (perhaps while debugging the compiler itself).
784 -fno-verbose-asm, the default, causes the extra information
785 to be omitted and is useful when comparing two assembler files. */
787 int flag_verbose_asm
= 0;
789 /* -dA causes debug commentary information to be produced in
790 the generated assembly code (to make it more readable). This option
791 is generally only of use to those who actually need to read the
792 generated assembly code (perhaps while debugging the compiler itself).
793 Currently, this switch is only used by dwarfout.c; however, it is intended
794 to be a catchall for printing debug information in the assembler file. */
796 int flag_debug_asm
= 0;
798 /* -fgnu-linker specifies use of the GNU linker for initializations.
799 (Or, more generally, a linker that handles initializations.)
800 -fno-gnu-linker says that collect2 will be used. */
802 int flag_gnu_linker
= 0;
804 int flag_gnu_linker
= 1;
810 /* Enable dead code elimination. */
813 /* Tag all structures with __attribute__(packed). */
814 int flag_pack_struct
= 0;
816 /* Emit code to check for stack overflow; also may cause large objects
817 to be allocated dynamically. */
818 int flag_stack_check
;
820 /* When non-NULL, indicates that whenever space is allocated on the
821 stack, the resulting stack pointer must not pass this
822 address---that is, for stacks that grow downward, the stack pointer
823 must always be greater than or equal to this address; for stacks
824 that grow upward, the stack pointer must be less than this address.
825 At present, the rtx may be either a REG or a SYMBOL_REF, although
826 the support provided depends on the backend. */
829 /* -fcheck-memory-usage causes extra code to be generated in order to check
830 memory accesses. This is used by a detector of bad memory accesses such
832 int flag_check_memory_usage
= 0;
834 /* -fprefix-function-name causes function name to be prefixed. This
835 can be used with -fcheck-memory-usage to isolate code compiled with
836 -fcheck-memory-usage. */
837 int flag_prefix_function_name
= 0;
839 /* 0 if pointer arguments may alias each other. True in C.
840 1 if pointer arguments may not alias each other but may alias
842 2 if pointer arguments may not alias each other and may not
843 alias global variables. True in Fortran.
844 This defaults to 0 for C. */
845 int flag_argument_noalias
= 0;
847 /* Nonzero if we should do (language-dependent) alias analysis.
848 Typically, this analysis will assume that expressions of certain
849 types do not alias expressions of certain other types. Only used
850 if alias analysis (in general) is enabled. */
851 int flag_strict_aliasing
= 0;
853 /* Instrument functions with calls at entry and exit, for profiling. */
854 int flag_instrument_function_entry_exit
= 0;
856 /* Nonzero means ignore `#ident' directives. 0 means handle them.
857 On SVR4 targets, it also controls whether or not to emit a
858 string identifying the compiler. */
860 int flag_no_ident
= 0;
862 /* This will perform a peephole pass before sched2. */
863 int flag_peephole2
= 0;
865 /* -fbounded-pointers causes gcc to compile pointers as composite
866 objects occupying three words: the pointer value, the base address
867 of the referent object, and the address immediately beyond the end
868 of the referent object. The base and extent allow us to perform
869 runtime bounds checking. -fbounded-pointers implies -fcheck-bounds. */
870 int flag_bounded_pointers
= 0;
872 /* -fcheck-bounds causes gcc to generate array bounds checks.
873 For C, C++: defaults to value of flag_bounded_pointers.
874 For ObjC: defaults to off.
875 For Java: defaults to on.
876 For Fortran: defaults to off.
877 For CHILL: defaults to off. */
878 int flag_bounds_check
= 0;
880 /* If one, renumber instruction UIDs to reduce the number of
881 unused UIDs if there are a lot of instructions. If greater than
882 one, unconditionally renumber instruction UIDs. */
883 int flag_renumber_insns
= 1;
885 /* Values of the -falign-* flags: how much to align labels in code.
886 0 means `use default', 1 means `don't align'.
887 For each variable, there is an _log variant which is the power
888 of two not less than the variable, for .align output. */
895 int align_labels_log
;
897 int align_functions_log
;
899 /* Table of supported debugging formats. */
903 /* Since PREFERRED_DEBUGGING_TYPE isn't necessarily a
904 constant expression, we use NO_DEBUG in its place. */
905 enum debug_info_type debug_type
;
906 int use_extensions_p
;
907 const char *description
;
911 { "", NO_DEBUG
, DEFAULT_GDB_EXTENSIONS
,
912 "Generate default debug format output" },
913 { "gdb", NO_DEBUG
, 1, "Generate default extended debug format output" },
914 #ifdef DBX_DEBUGGING_INFO
915 { "stabs", DBX_DEBUG
, 0, "Generate STABS format debug output" },
916 { "stabs+", DBX_DEBUG
, 1, "Generate extended STABS format debug output" },
918 #ifdef DWARF_DEBUGGING_INFO
919 { "dwarf", DWARF_DEBUG
, 0, "Generate DWARF-1 format debug output"},
920 { "dwarf+", DWARF_DEBUG
, 1,
921 "Generated extended DWARF-1 format debug output" },
923 #ifdef DWARF2_DEBUGGING_INFO
924 { "dwarf-2", DWARF2_DEBUG
, 0, "Enable DWARF-2 debug output" },
926 #ifdef XCOFF_DEBUGGING_INFO
927 { "xcoff", XCOFF_DEBUG
, 0, "Generate XCOFF format debug output" },
928 { "xcoff+", XCOFF_DEBUG
, 1, "Generate extended XCOFF format debug output" },
930 #ifdef SDB_DEBUGGING_INFO
931 { "coff", SDB_DEBUG
, 0, "Generate COFF format debug output" },
941 const char *description
;
943 lang_independent_options
;
945 /* Add or remove a leading underscore from user symbols. */
946 int flag_leading_underscore
= -1;
948 /* The user symbol prefix after having resolved same. */
949 const char *user_label_prefix
;
951 /* A default for same. */
952 #ifndef USER_LABEL_PREFIX
953 #define USER_LABEL_PREFIX ""
956 /* Table of language-independent -f options.
957 STRING is the option name. VARIABLE is the address of the variable.
958 ON_VALUE is the value to store in VARIABLE
959 if `-fSTRING' is seen as an option.
960 (If `-fno-STRING' is seen as an option, the opposite value is stored.) */
962 lang_independent_options f_options
[] =
964 {"eliminate-dwarf2-dups", &flag_eliminate_dwarf2_dups
, 1,
965 "Perform DWARF2 duplicate elimination"},
966 {"float-store", &flag_float_store
, 1,
967 "Do not store floats in registers" },
968 {"volatile", &flag_volatile
, 1,
969 "Consider all mem refs through pointers as volatile"},
970 {"volatile-global", &flag_volatile_global
, 1,
971 "Consider all mem refs to global data to be volatile" },
972 {"volatile-static", &flag_volatile_static
, 1,
973 "Consider all mem refs to static data to be volatile" },
974 {"defer-pop", &flag_defer_pop
, 1,
975 "Defer popping functions args from stack until later" },
976 {"omit-frame-pointer", &flag_omit_frame_pointer
, 1,
977 "When possible do not generate stack frames"},
978 {"optimize-sibling-calls", &flag_optimize_sibling_calls
, 1,
979 "Optimize sibling and tail recursive calls" },
980 {"cse-follow-jumps", &flag_cse_follow_jumps
, 1,
981 "When running CSE, follow jumps to their targets" },
982 {"cse-skip-blocks", &flag_cse_skip_blocks
, 1,
983 "When running CSE, follow conditional jumps" },
984 {"expensive-optimizations", &flag_expensive_optimizations
, 1,
985 "Perform a number of minor, expensive optimisations" },
986 {"thread-jumps", &flag_thread_jumps
, 1,
987 "Perform jump threading optimisations"},
988 {"strength-reduce", &flag_strength_reduce
, 1,
989 "Perform strength reduction optimisations" },
990 {"unroll-loops", &flag_unroll_loops
, 1,
991 "Perform loop unrolling when iteration count is known" },
992 {"unroll-all-loops", &flag_unroll_all_loops
, 1,
993 "Perform loop unrolling for all loops" },
994 {"move-all-movables", &flag_move_all_movables
, 1,
995 "Force all loop invariant computations out of loops" },
996 {"reduce-all-givs", &flag_reduce_all_givs
, 1,
997 "Strength reduce all loop general induction variables" },
998 {"writable-strings", &flag_writable_strings
, 1,
999 "Store strings in writable data section" },
1000 {"peephole", &flag_no_peephole
, 0,
1001 "Enable machine specific peephole optimisations" },
1002 {"force-mem", &flag_force_mem
, 1,
1003 "Copy memory operands into registers before using" },
1004 {"force-addr", &flag_force_addr
, 1,
1005 "Copy memory address constants into regs before using" },
1006 {"function-cse", &flag_no_function_cse
, 0,
1007 "Allow function addresses to be held in registers" },
1008 {"inline-functions", &flag_inline_functions
, 1,
1009 "Integrate simple functions into their callers" },
1010 {"keep-inline-functions", &flag_keep_inline_functions
, 1,
1011 "Generate code for funcs even if they are fully inlined" },
1012 {"inline", &flag_no_inline
, 0,
1013 "Pay attention to the 'inline' keyword"},
1014 {"keep-static-consts", &flag_keep_static_consts
, 1,
1015 "Emit static const variables even if they are not used" },
1016 {"syntax-only", &flag_syntax_only
, 1,
1017 "Check for syntax errors, then stop" },
1018 {"shared-data", &flag_shared_data
, 1,
1019 "Mark data as shared rather than private" },
1020 {"caller-saves", &flag_caller_saves
, 1,
1021 "Enable saving registers around function calls" },
1022 {"pcc-struct-return", &flag_pcc_struct_return
, 1,
1023 "Return 'short' aggregates in memory, not registers" },
1024 {"reg-struct-return", &flag_pcc_struct_return
, 0,
1025 "Return 'short' aggregates in registers" },
1026 {"delayed-branch", &flag_delayed_branch
, 1,
1027 "Attempt to fill delay slots of branch instructions" },
1028 {"gcse", &flag_gcse
, 1,
1029 "Perform the global common subexpression elimination" },
1030 {"rerun-cse-after-loop", &flag_rerun_cse_after_loop
, 1,
1031 "Run CSE pass after loop optimisations"},
1032 {"rerun-loop-opt", &flag_rerun_loop_opt
, 1,
1033 "Run the loop optimiser twice"},
1034 {"delete-null-pointer-checks", &flag_delete_null_pointer_checks
, 1,
1035 "Delete useless null pointer checks" },
1036 {"pretend-float", &flag_pretend_float
, 1,
1037 "Pretend that host and target use the same FP format"},
1038 {"schedule-insns", &flag_schedule_insns
, 1,
1039 "Reschedule instructions to avoid pipeline stalls"},
1040 {"schedule-insns2", &flag_schedule_insns_after_reload
, 1,
1041 "Run two passes of the instruction scheduler"},
1042 {"sched-interblock",&flag_schedule_interblock
, 1,
1043 "Enable scheduling across basic blocks" },
1044 {"sched-spec",&flag_schedule_speculative
, 1,
1045 "Allow speculative motion of non-loads" },
1046 {"sched-spec-load",&flag_schedule_speculative_load
, 1,
1047 "Allow speculative motion of some loads" },
1048 {"sched-spec-load-dangerous",&flag_schedule_speculative_load_dangerous
, 1,
1049 "Allow speculative motion of more loads" },
1050 {"branch-count-reg",&flag_branch_on_count_reg
, 1,
1051 "Replace add,compare,branch with branch on count reg"},
1052 {"pic", &flag_pic
, 1,
1053 "Generate position independent code, if possible"},
1054 {"PIC", &flag_pic
, 2, ""},
1055 {"exceptions", &flag_exceptions
, 1,
1056 "Enable exception handling" },
1057 {"new-exceptions", &flag_new_exceptions
, 1,
1058 "Use the new model for exception handling" },
1059 {"unwind-tables", &flag_unwind_tables
, 1,
1060 "Just generate unwind tables for exception handling" },
1061 {"sjlj-exceptions", &exceptions_via_longjmp
, 1,
1062 "Use setjmp/longjmp to handle exceptions" },
1063 {"asynchronous-exceptions", &asynchronous_exceptions
, 1,
1064 "Support asynchronous exceptions" },
1065 {"profile-arcs", &profile_arc_flag
, 1,
1066 "Insert arc based program profiling code" },
1067 {"test-coverage", &flag_test_coverage
, 1,
1068 "Create data files needed by gcov" },
1069 {"branch-probabilities", &flag_branch_probabilities
, 1,
1070 "Use profiling information for branch probabilities" },
1071 {"reorder-blocks", &flag_reorder_blocks
, 1,
1072 "Reorder basic blocks to improve code placement" },
1073 {"rename-registers", &flag_rename_registers
, 1,
1074 "Do the register renaming optimization pass"},
1075 {"fast-math", &flag_fast_math
, 1,
1076 "Improve FP speed by violating ANSI & IEEE rules" },
1077 {"common", &flag_no_common
, 0,
1078 "Do not put unitialised globals in the common section" },
1079 {"inhibit-size-directive", &flag_inhibit_size_directive
, 1,
1080 "Do not generate .size directives" },
1081 {"function-sections", &flag_function_sections
, 1,
1082 "place each function into its own section" },
1083 {"data-sections", &flag_data_sections
, 1,
1084 "place data items into their own section" },
1085 {"verbose-asm", &flag_verbose_asm
, 1,
1086 "Add extra commentry to assembler output"},
1087 {"gnu-linker", &flag_gnu_linker
, 1,
1088 "Output GNU ld formatted global initialisers"},
1089 {"regmove", &flag_regmove
, 1,
1090 "Enables a register move optimisation"},
1091 {"optimize-register-move", &flag_regmove
, 1,
1092 "Do the full regmove optimization pass"},
1093 {"pack-struct", &flag_pack_struct
, 1,
1094 "Pack structure members together without holes" },
1095 {"stack-check", &flag_stack_check
, 1,
1096 "Insert stack checking code into the program" },
1097 {"argument-alias", &flag_argument_noalias
, 0,
1098 "Specify that arguments may alias each other & globals"},
1099 {"argument-noalias", &flag_argument_noalias
, 1,
1100 "Assume arguments may alias globals but not each other"},
1101 {"argument-noalias-global", &flag_argument_noalias
, 2,
1102 "Assume arguments do not alias each other or globals" },
1103 {"strict-aliasing", &flag_strict_aliasing
, 1,
1104 "Assume strict aliasing rules apply" },
1105 {"align-loops", &align_loops
, 0,
1106 "Align the start of loops" },
1107 {"align-jumps", &align_jumps
, 0,
1108 "Align labels which are only reached by jumping" },
1109 {"align-labels", &align_labels
, 0,
1110 "Align all labels" },
1111 {"align-functions", &align_functions
, 0,
1112 "Align the start of functions" },
1113 {"check-memory-usage", &flag_check_memory_usage
, 1,
1114 "Generate code to check every memory access" },
1115 {"prefix-function-name", &flag_prefix_function_name
, 1,
1116 "Add a prefix to all function names" },
1117 {"dump-unnumbered", &flag_dump_unnumbered
, 1,
1118 "Suppress output of instruction numbers and line number notes in debugging dumps"},
1119 {"instrument-functions", &flag_instrument_function_entry_exit
, 1,
1120 "Instrument function entry/exit with profiling calls"},
1121 {"ssa", &flag_ssa
, 1,
1122 "Enable SSA optimizations" },
1123 {"dce", &flag_dce
, 1,
1124 "Enable dead code elimination" },
1125 {"leading-underscore", &flag_leading_underscore
, 1,
1126 "External symbols have a leading underscore" },
1127 {"ident", &flag_no_ident
, 0,
1128 "Process #ident directives"},
1129 { "peephole2", &flag_peephole2
, 1,
1130 "Enables an rtl peephole pass run before sched2" },
1131 {"math-errno", &flag_errno_math
, 1,
1132 "Set errno after built-in math functions"},
1133 {"bounded-pointers", &flag_bounded_pointers
, 1,
1134 "Compile pointers as triples: value, base & end" },
1135 {"bounds-check", &flag_bounds_check
, 1,
1136 "Generate code to check bounds before dereferencing pointers and arrays" },
1137 {"single-precision-constant", &flag_single_precision_constant
, 1,
1138 "Convert floating point constant to single precision constant"},
1139 {"time-report", &time_report
, 1,
1140 "Report time taken by each compiler pass at end of run"},
1141 {"mem-report", &mem_report
, 1,
1142 "Report on permanent memory allocation at end of run"},
1145 /* Table of language-specific options. */
1147 static struct lang_opt
1150 const char *description
;
1152 documented_lang_options
[] =
1154 /* In order not to overload the --help output, the convention
1155 used here is to only describe those options which are not
1156 enabled by default. */
1158 { "-ansi", "Compile just for ISO C89" },
1159 { "-fallow-single-precision",
1160 "Do not promote floats to double if using -traditional" },
1161 { "-std= ", "Determine language standard"},
1163 { "-fsigned-bitfields", "" },
1164 { "-funsigned-bitfields","Make bitfields by unsigned by default" },
1165 { "-fno-signed-bitfields", "" },
1166 { "-fno-unsigned-bitfields","" },
1167 { "-fsigned-char", "Make 'char' be signed by default"},
1168 { "-funsigned-char", "Make 'char' be unsigned by default"},
1169 { "-fno-signed-char", "" },
1170 { "-fno-unsigned-char", "" },
1172 { "-ftraditional", "" },
1173 { "-traditional", "Attempt to support traditional K&R style C"},
1174 { "-fnotraditional", "" },
1175 { "-fno-traditional", "" },
1178 { "-fno-asm", "Do not recognise the 'asm' keyword" },
1179 { "-fbuiltin", "" },
1180 { "-fno-builtin", "Do not recognise any built in functions" },
1181 { "-fhosted", "Assume normal C execution environment" },
1182 { "-fno-hosted", "" },
1184 "Assume that standard libraries & main might not exist" },
1185 { "-fno-freestanding", "" },
1186 { "-fcond-mismatch", "Allow different types as args of ? operator"},
1187 { "-fno-cond-mismatch", "" },
1188 { "-fdollars-in-identifiers", "Allow the use of $ inside identifiers" },
1189 { "-fno-dollars-in-identifiers", "" },
1190 { "-fpreprocessed", "" },
1191 { "-fno-preprocessed", "" },
1192 { "-fshort-double", "Use the same size for double as for float" },
1193 { "-fno-short-double", "" },
1194 { "-fshort-enums", "Use the smallest fitting integer to hold enums"},
1195 { "-fno-short-enums", "" },
1196 { "-fshort-wchar", "Override the underlying type for wchar_t to `unsigned short'" },
1197 { "-fno-short-wchar", "" },
1199 { "-Wall", "Enable most warning messages" },
1200 { "-Wbad-function-cast",
1201 "Warn about casting functions to incompatible types" },
1202 { "-Wno-bad-function-cast", "" },
1203 { "-Wmissing-noreturn",
1204 "Warn about functions which might be candidates for attribute noreturn" },
1205 { "-Wno-missing-noreturn", "" },
1206 { "-Wcast-qual", "Warn about casts which discard qualifiers"},
1207 { "-Wno-cast-qual", "" },
1208 { "-Wchar-subscripts", "Warn about subscripts whose type is 'char'"},
1209 { "-Wno-char-subscripts", "" },
1210 { "-Wcomment", "Warn if nested comments are detected" },
1211 { "-Wno-comment", "" },
1212 { "-Wcomments", "Warn if nested comments are detected" },
1213 { "-Wno-comments", "" },
1214 { "-Wconversion", "Warn about possibly confusing type conversions" },
1215 { "-Wno-conversion", "" },
1216 { "-Wformat", "Warn about printf format anomalies" },
1217 { "-Wno-format", "" },
1218 { "-Wimplicit-function-declaration",
1219 "Warn about implicit function declarations" },
1220 { "-Wno-implicit-function-declaration", "" },
1221 { "-Werror-implicit-function-declaration", "" },
1222 { "-Wimplicit-int", "Warn when a declaration does not specify a type" },
1223 { "-Wno-implicit-int", "" },
1224 { "-Wimplicit", "" },
1225 { "-Wno-implicit", "" },
1226 { "-Wimport", "Warn about the use of the #import directive" },
1227 { "-Wno-import", "" },
1228 { "-Wlong-long","" },
1229 { "-Wno-long-long", "Do not warn about using 'long long' when -pedantic" },
1230 { "-Wmain", "Warn about suspicious declarations of main" },
1231 { "-Wno-main", "" },
1232 { "-Wmissing-braces",
1233 "Warn about possibly missing braces around initialisers" },
1234 { "-Wno-missing-braces", "" },
1235 { "-Wmissing-declarations",
1236 "Warn about global funcs without previous declarations"},
1237 { "-Wno-missing-declarations", "" },
1238 { "-Wmissing-prototypes", "Warn about global funcs without prototypes" },
1239 { "-Wno-missing-prototypes", "" },
1240 { "-Wmultichar", "Warn about use of multicharacter literals"},
1241 { "-Wno-multichar", "" },
1242 { "-Wnested-externs", "Warn about externs not at file scope level" },
1243 { "-Wno-nested-externs", "" },
1244 { "-Wparentheses", "Warn about possible missing parentheses" },
1245 { "-Wno-parentheses", "" },
1246 { "-Wpointer-arith", "Warn about function pointer arithmetic" },
1247 { "-Wno-pointer-arith", "" },
1248 { "-Wredundant-decls",
1249 "Warn about multiple declarations of the same object" },
1250 { "-Wno-redundant-decls", "" },
1251 { "-Wsign-compare", "Warn about signed/unsigned comparisons" },
1252 { "-Wno-sign-compare", "" },
1253 { "-Wfloat-equal", "Warn about testing equality of floating point numbers" },
1254 { "-Wno-float-equal", "" },
1255 { "-Wunknown-pragmas", "Warn about unrecognized pragmas" },
1256 { "-Wno-unknown-pragmas", "" },
1257 { "-Wstrict-prototypes", "Warn about non-prototyped function decls" },
1258 { "-Wno-strict-prototypes", "" },
1259 { "-Wtraditional", "Warn about constructs whose meaning change in ISO C"},
1260 { "-Wno-traditional", "" },
1261 { "-Wtrigraphs", "Warn when trigraphs are encountered" },
1262 { "-Wno-trigraphs", "" },
1264 { "-Wno-undef", "" },
1265 { "-Wwrite-strings", "Mark strings as 'const char *'"},
1266 { "-Wno-write-strings", "" },
1268 #define DEFINE_LANG_NAME(NAME) { NULL, NAME },
1270 #include "options.h"
1274 /* Here is a table, controlled by the tm.h file, listing each -m switch
1275 and which bits in `target_switches' it should set or clear.
1276 If VALUE is positive, it is bits to set.
1277 If VALUE is negative, -VALUE is bits to clear.
1278 (The sign bit is not used so there is no confusion.) */
1284 const char *description
;
1286 target_switches
[] = TARGET_SWITCHES
;
1288 /* This table is similar, but allows the switch to have a value. */
1290 #ifdef TARGET_OPTIONS
1294 const char **variable
;
1295 const char *description
;
1297 target_options
[] = TARGET_OPTIONS
;
1300 /* Options controlling warnings. */
1302 /* Don't print warning messages. -w. */
1304 int inhibit_warnings
= 0;
1306 /* Print various extra warnings. -W. */
1308 int extra_warnings
= 0;
1310 /* Treat warnings as errors. -Werror. */
1312 int warnings_are_errors
= 0;
1314 /* Nonzero to warn about unused variables, functions et.al. */
1316 int warn_unused_function
;
1317 int warn_unused_label
;
1318 int warn_unused_parameter
;
1319 int warn_unused_variable
;
1320 int warn_unused_value
;
1323 set_Wunused (setting
)
1326 warn_unused_function
= setting
;
1327 warn_unused_label
= setting
;
1328 /* Unused function parameter warnings are reported when either ``-W
1329 -Wunused'' or ``-Wunused-parameter'' is specified. Differentiate
1330 -Wunused by setting WARN_UNUSED_PARAMETER to -1. */
1332 warn_unused_parameter
= 0;
1333 else if (!warn_unused_parameter
)
1334 warn_unused_parameter
= -1;
1335 warn_unused_variable
= setting
;
1336 warn_unused_value
= setting
;
1339 /* Nonzero to warn about code which is never reached. */
1341 int warn_notreached
;
1343 /* Nonzero to warn about variables used before they are initialized. */
1345 int warn_uninitialized
;
1347 /* Nonzero means warn about all declarations which shadow others. */
1351 /* Warn if a switch on an enum fails to have a case for every enum value. */
1355 /* Nonzero means warn about function definitions that default the return type
1356 or that use a null return and have a return-type other than void. */
1358 int warn_return_type
;
1360 /* Nonzero means warn about pointer casts that increase the required
1361 alignment of the target type (and might therefore lead to a crash
1362 due to a misaligned access). */
1364 int warn_cast_align
;
1366 /* Nonzero means warn about any identifiers that match in the first N
1367 characters. The value N is in `id_clash_len'. */
1372 /* Nonzero means warn about any objects definitions whose size is larger
1373 than N bytes. Also want about function definitions whose returned
1374 values are larger than N bytes. The value N is in `larger_than_size'. */
1376 int warn_larger_than
;
1377 HOST_WIDE_INT larger_than_size
;
1379 /* Nonzero means warn if inline function is too large. */
1383 /* Warn if a function returns an aggregate,
1384 since there are often incompatible calling conventions for doing this. */
1386 int warn_aggregate_return
;
1388 /* Warn if packed attribute on struct is unnecessary and inefficient. */
1392 /* Warn when gcc pads a structure to an alignment boundary. */
1396 /* Likewise for -W. */
1398 lang_independent_options W_options
[] =
1400 {"unused-function", &warn_unused_function
, 1, "Warn when a function is unused" },
1401 {"unused-label", &warn_unused_label
, 1, "Warn when a label is unused" },
1402 {"unused-parameter", &warn_unused_parameter
, 1, "Warn when a function parameter is unused" },
1403 {"unused-variable", &warn_unused_variable
, 1, "Warn when a variable is unused" },
1404 {"unused-value", &warn_unused_value
, 1, "Warn when an expression value is unused" },
1405 {"error", &warnings_are_errors
, 1, ""},
1406 {"shadow", &warn_shadow
, 1, "Warn when one local variable shadows another" },
1407 {"switch", &warn_switch
, 1,
1408 "Warn about enumerated switches missing a specific case" },
1409 {"aggregate-return", &warn_aggregate_return
, 1,
1410 "Warn about returning structures, unions or arrays" },
1411 {"cast-align", &warn_cast_align
, 1,
1412 "Warn about pointer casts which increase alignment" },
1413 {"unreachable-code", &warn_notreached
, 1,
1414 "Warn about code that will never be executed" },
1415 {"uninitialized", &warn_uninitialized
, 1,
1416 "Warn about unitialized automatic variables"},
1417 {"inline", &warn_inline
, 1,
1418 "Warn when an inlined function cannot be inlined"},
1419 {"packed", &warn_packed
, 1,
1420 "Warn when the packed attribute has no effect on struct layout"},
1421 {"padded", &warn_padded
, 1,
1422 "Warn when padding is required to align struct members"}
1425 /* Output files for assembler code (real compiler output)
1426 and debugging dumps. */
1429 FILE *aux_info_file
;
1430 FILE *rtl_dump_file
= NULL
;
1432 /* Decode the string P as an integral parameter.
1433 If the string is indeed an integer return its numeric value else
1434 issue an Invalid Option error for the option PNAME and return DEFVAL.
1435 If PNAME is zero just return DEFVAL, do not call error. */
1438 read_integral_parameter (p
, pname
, defval
)
1443 const char *endp
= p
;
1447 if (*endp
>= '0' && *endp
<= '9')
1456 error ("Invalid option `%s'", pname
);
1464 /* This is the default decl_printable_name function. */
1467 decl_name (decl
, verbosity
)
1469 int verbosity ATTRIBUTE_UNUSED
;
1471 return IDENTIFIER_POINTER (DECL_NAME (decl
));
1474 /* Mark P for GC. Also mark main_input_filename and input_filename. */
1480 struct file_stack
*stack
= *(struct file_stack
**)p
;
1482 /* We're only called for input_file_stack, so we can mark the current
1483 input_filename here as well. */
1484 ggc_mark_string (main_input_filename
);
1485 ggc_mark_string (input_filename
);
1489 ggc_mark_string (stack
->name
);
1490 stack
= stack
->next
;
1495 /* This calls abort and is used to avoid problems when abort if a macro.
1496 It is used when we need to pass the address of abort. */
1504 /* When `malloc.c' is compiled with `rcheck' defined,
1505 it calls this function to report clobberage. */
1509 const char *s ATTRIBUTE_UNUSED
;
1514 /* Return the logarithm of X, base 2, considering X unsigned,
1515 if X is a power of 2. Otherwise, returns -1.
1517 This should be used via the `exact_log2' macro. */
1521 register unsigned HOST_WIDE_INT x
;
1523 register int log
= 0;
1524 /* Test for 0 or a power of 2. */
1525 if (x
== 0 || x
!= (x
& -x
))
1527 while ((x
>>= 1) != 0)
1532 /* Given X, an unsigned number, return the largest int Y such that 2**Y <= X.
1533 If X is 0, return -1.
1535 This should be used via the floor_log2 macro. */
1539 register unsigned HOST_WIDE_INT x
;
1541 register int log
= -1;
1548 static int float_handler_set
;
1550 jmp_buf float_handler
;
1552 /* Signals actually come here. */
1555 float_signal (signo
)
1556 /* If this is missing, some compilers complain. */
1557 int signo ATTRIBUTE_UNUSED
;
1559 if (float_handled
== 0)
1560 crash_signal (signo
);
1561 #if defined (USG) || defined (hpux)
1562 /* Re-enable the signal catcher. */
1563 signal (SIGFPE
, float_signal
);
1566 signal (SIGFPE
, float_signal
);
1567 longjmp (float_handler
, 1);
1570 /* Specify where to longjmp to when a floating arithmetic error happens.
1571 If HANDLER is 0, it means don't handle the errors any more. */
1574 set_float_handler (handler
)
1577 float_handled
= (handler
!= 0);
1579 bcopy ((char *) handler
, (char *) float_handler
, sizeof (float_handler
));
1581 if (float_handled
&& ! float_handler_set
)
1583 signal (SIGFPE
, float_signal
);
1584 float_handler_set
= 1;
1588 /* This is a wrapper function for code which might elicit an
1589 arithmetic exception. That code should be passed in as a function
1590 pointer FN, and one argument DATA. DATA is usually a struct which
1591 contains the real input and output for function FN. This function
1592 returns 0 (failure) if longjmp was called (i.e. an exception
1593 occured.) It returns 1 (success) otherwise. */
1596 do_float_handler (fn
, data
)
1597 void (*fn
) PARAMS ((PTR
));
1604 /* We got here via longjmp () caused by an exception in function
1606 set_float_handler (NULL
);
1610 set_float_handler (buf
);
1612 set_float_handler (NULL
);
1616 /* Specify, in HANDLER, where to longjmp to when a floating arithmetic
1617 error happens, pushing the previous specification into OLD_HANDLER.
1618 Return an indication of whether there was a previous handler in effect. */
1621 push_float_handler (handler
, old_handler
)
1622 jmp_buf handler
, old_handler
;
1624 int was_handled
= float_handled
;
1628 memcpy ((char *) old_handler
, (char *) float_handler
,
1629 sizeof (float_handler
));
1631 memcpy ((char *) float_handler
, (char *) handler
, sizeof (float_handler
));
1635 /* Restore the previous specification of whether and where to longjmp to
1636 when a floating arithmetic error happens. */
1639 pop_float_handler (handled
, handler
)
1643 float_handled
= handled
;
1645 bcopy ((char *) handler
, (char *) float_handler
, sizeof (float_handler
));
1648 /* Handler for fatal signals, such as SIGSEGV. These are transformed
1649 into ICE messages, which is much more user friendly. */
1652 crash_signal (signo
)
1653 /* If this is missing, some compilers complain. */
1656 fatal ("Internal error: %s.\n\
1657 Please submit a full bug report.\n\
1658 See %s for instructions.", strsignal (signo
), GCCBUGURL
);
1661 /* Strip off a legitimate source ending from the input string NAME of
1662 length LEN. Rather than having to know the names used by all of
1663 our front ends, we strip off an ending of a period followed by
1664 up to five characters. (Java uses ".class".) */
1667 strip_off_ending (name
, len
)
1672 for (i
= 2; i
< 6 && len
> i
; i
++)
1674 if (name
[len
- i
] == '.')
1676 name
[len
- i
] = '\0';
1682 /* Given a file name X, return the nondirectory portion. */
1685 file_name_nondirectory (x
)
1688 char *tmp
= (char *) rindex (x
, '/');
1689 if (DIR_SEPARATOR
!= '/' && ! tmp
)
1690 tmp
= (char *) rindex (x
, DIR_SEPARATOR
);
1692 return (char *) (tmp
+ 1);
1697 /* Output a quoted string. */
1700 output_quoted_string (asm_file
, string
)
1704 #ifdef OUTPUT_QUOTED_STRING
1705 OUTPUT_QUOTED_STRING (asm_file
, string
);
1709 putc ('\"', asm_file
);
1710 while ((c
= *string
++) != 0)
1712 if (c
== '\"' || c
== '\\')
1713 putc ('\\', asm_file
);
1716 putc ('\"', asm_file
);
1720 /* Output a file name in the form wanted by System V. */
1723 output_file_directive (asm_file
, input_name
)
1725 const char *input_name
;
1727 int len
= strlen (input_name
);
1728 const char *na
= input_name
+ len
;
1730 /* NA gets INPUT_NAME sans directory names. */
1731 while (na
> input_name
)
1733 if (IS_DIR_SEPARATOR (na
[-1]))
1738 #ifdef ASM_OUTPUT_MAIN_SOURCE_FILENAME
1739 ASM_OUTPUT_MAIN_SOURCE_FILENAME (asm_file
, na
);
1741 #ifdef ASM_OUTPUT_SOURCE_FILENAME
1742 ASM_OUTPUT_SOURCE_FILENAME (asm_file
, na
);
1744 fprintf (asm_file
, "\t.file\t");
1745 output_quoted_string (asm_file
, na
);
1746 fputc ('\n', asm_file
);
1751 #ifdef ASM_IDENTIFY_LANGUAGE
1752 /* Routine to build language identifier for object file. */
1755 output_lang_identify (asm_out_file
)
1758 int len
= strlen (lang_identify ()) + sizeof ("__gnu_compiled_") + 1;
1759 char *s
= (char *) alloca (len
);
1761 sprintf (s
, "__gnu_compiled_%s", lang_identify ());
1762 ASM_OUTPUT_LABEL (asm_out_file
, s
);
1766 /* Routine to open a dump file. Return true if the dump file is enabled. */
1769 open_dump_file (index
, decl
)
1770 enum dump_file_index index
;
1774 const char *open_arg
;
1777 if (! dump_file
[index
].enabled
)
1780 timevar_push (TV_DUMP
);
1781 if (rtl_dump_file
!= NULL
)
1782 fclose (rtl_dump_file
);
1784 sprintf (seq
, ".%02d.", index
);
1786 if (! dump_file
[index
].initialized
)
1788 /* If we've not initialized the files, do so now. */
1789 if (graph_dump_format
!= no_graph
1790 && dump_file
[index
].graph_dump_p
)
1792 dump_name
= concat (seq
, dump_file
[index
].extension
, NULL
);
1793 clean_graph_dump_file (dump_base_name
, dump_name
);
1796 dump_file
[index
].initialized
= 1;
1802 dump_name
= concat (dump_base_name
, seq
,
1803 dump_file
[index
].extension
, NULL
);
1805 rtl_dump_file
= fopen (dump_name
, open_arg
);
1806 if (rtl_dump_file
== NULL
)
1807 pfatal_with_name (dump_name
);
1812 fprintf (rtl_dump_file
, "\n;; Function %s\n\n",
1813 decl_printable_name (decl
, 2));
1815 timevar_pop (TV_DUMP
);
1819 /* Routine to close a dump file. */
1822 close_dump_file (index
, func
, insns
)
1823 enum dump_file_index index
;
1824 void (*func
) PARAMS ((FILE *, rtx
));
1827 if (! rtl_dump_file
)
1830 timevar_push (TV_DUMP
);
1832 && graph_dump_format
!= no_graph
1833 && dump_file
[index
].graph_dump_p
)
1838 sprintf (seq
, ".%02d.", index
);
1839 suffix
= concat (seq
, dump_file
[index
].extension
, NULL
);
1840 print_rtl_graph_with_bb (dump_base_name
, suffix
, insns
);
1845 func (rtl_dump_file
, insns
);
1847 fflush (rtl_dump_file
);
1848 fclose (rtl_dump_file
);
1850 rtl_dump_file
= NULL
;
1851 timevar_pop (TV_DUMP
);
1854 /* Do any final processing required for the declarations in VEC, of
1855 which there are LEN. We write out inline functions and variables
1856 that have been deferred until this point, but which are required.
1857 Returns non-zero if anything was put out. */
1860 wrapup_global_declarations (vec
, len
)
1867 int output_something
= 0;
1869 for (i
= 0; i
< len
; i
++)
1873 /* We're not deferring this any longer. */
1874 DECL_DEFER_OUTPUT (decl
) = 0;
1876 if (TREE_CODE (decl
) == VAR_DECL
&& DECL_SIZE (decl
) == 0
1877 && incomplete_decl_finalize_hook
!= 0)
1878 (*incomplete_decl_finalize_hook
) (decl
);
1881 /* Now emit any global variables or functions that we have been
1882 putting off. We need to loop in case one of the things emitted
1883 here references another one which comes earlier in the list. */
1887 for (i
= 0; i
< len
; i
++)
1891 if (TREE_ASM_WRITTEN (decl
) || DECL_EXTERNAL (decl
))
1894 /* Don't write out static consts, unless we still need them.
1896 We also keep static consts if not optimizing (for debugging),
1897 unless the user specified -fno-keep-static-consts.
1898 ??? They might be better written into the debug information.
1899 This is possible when using DWARF.
1901 A language processor that wants static constants to be always
1902 written out (even if it is not used) is responsible for
1903 calling rest_of_decl_compilation itself. E.g. the C front-end
1904 calls rest_of_decl_compilation from finish_decl.
1905 One motivation for this is that is conventional in some
1906 environments to write things like:
1907 static const char rcsid[] = "... version string ...";
1908 intending to force the string to be in the executable.
1910 A language processor that would prefer to have unneeded
1911 static constants "optimized away" would just defer writing
1912 them out until here. E.g. C++ does this, because static
1913 constants are often defined in header files.
1915 ??? A tempting alternative (for both C and C++) would be
1916 to force a constant to be written if and only if it is
1917 defined in a main file, as opposed to an include file. */
1919 if (TREE_CODE (decl
) == VAR_DECL
&& TREE_STATIC (decl
)
1920 && (! TREE_READONLY (decl
)
1921 || TREE_PUBLIC (decl
)
1922 || (!optimize
&& flag_keep_static_consts
)
1923 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl
))))
1926 rest_of_decl_compilation (decl
, NULL_PTR
, 1, 1);
1929 if (TREE_CODE (decl
) == FUNCTION_DECL
1930 && DECL_INITIAL (decl
) != 0
1931 && DECL_SAVED_INSNS (decl
) != 0
1932 && (flag_keep_inline_functions
1933 || (TREE_PUBLIC (decl
) && !DECL_COMDAT (decl
))
1934 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl
))))
1937 temporary_allocation ();
1938 output_inline_function (decl
);
1939 permanent_allocation (1);
1944 output_something
= 1;
1948 return output_something
;
1951 /* Issue appropriate warnings for the global declarations in VEC (of
1952 which there are LEN). Output debugging information for them. */
1955 check_global_declarations (vec
, len
)
1962 for (i
= 0; i
< len
; i
++)
1966 if (TREE_CODE (decl
) == VAR_DECL
&& TREE_STATIC (decl
)
1967 && ! TREE_ASM_WRITTEN (decl
))
1968 /* Cancel the RTL for this decl so that, if debugging info
1969 output for global variables is still to come,
1970 this one will be omitted. */
1971 DECL_RTL (decl
) = NULL
;
1973 /* Warn about any function
1974 declared static but not defined.
1975 We don't warn about variables,
1976 because many programs have static variables
1977 that exist only to get some text into the object file. */
1978 if (TREE_CODE (decl
) == FUNCTION_DECL
1979 && (warn_unused_function
1980 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl
)))
1981 && DECL_INITIAL (decl
) == 0
1982 && DECL_EXTERNAL (decl
)
1983 && ! DECL_ARTIFICIAL (decl
)
1984 && ! TREE_PUBLIC (decl
))
1986 if (TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl
)))
1987 pedwarn_with_decl (decl
,
1988 "`%s' used but never defined");
1990 warning_with_decl (decl
,
1991 "`%s' declared `static' but never defined");
1992 /* This symbol is effectively an "extern" declaration now. */
1993 TREE_PUBLIC (decl
) = 1;
1994 assemble_external (decl
);
1997 /* Warn about static fns or vars defined but not used,
1998 but not about inline functions or static consts
1999 since defining those in header files is normal practice. */
2000 if (((warn_unused_function
2001 && TREE_CODE (decl
) == FUNCTION_DECL
&& ! DECL_INLINE (decl
))
2002 || (warn_unused_variable
2003 && TREE_CODE (decl
) == VAR_DECL
&& ! TREE_READONLY (decl
)))
2004 && ! DECL_IN_SYSTEM_HEADER (decl
)
2005 && ! DECL_EXTERNAL (decl
)
2006 && ! TREE_PUBLIC (decl
)
2007 && ! TREE_USED (decl
)
2008 && (TREE_CODE (decl
) == FUNCTION_DECL
|| ! DECL_REGISTER (decl
))
2009 /* The TREE_USED bit for file-scope decls
2010 is kept in the identifier, to handle multiple
2011 external decls in different scopes. */
2012 && ! TREE_USED (DECL_NAME (decl
)))
2013 warning_with_decl (decl
, "`%s' defined but not used");
2015 timevar_push (TV_SYMOUT
);
2016 #ifdef SDB_DEBUGGING_INFO
2017 /* The COFF linker can move initialized global vars to the end.
2018 And that can screw up the symbol ordering.
2019 By putting the symbols in that order to begin with,
2020 we avoid a problem. mcsun!unido!fauern!tumuc!pes@uunet.uu.net. */
2021 if (write_symbols
== SDB_DEBUG
&& TREE_CODE (decl
) == VAR_DECL
2022 && TREE_PUBLIC (decl
) && DECL_INITIAL (decl
)
2023 && ! DECL_EXTERNAL (decl
)
2024 && DECL_RTL (decl
) != 0)
2025 sdbout_symbol (decl
, 0);
2027 /* Output COFF information for non-global
2028 file-scope initialized variables. */
2029 if (write_symbols
== SDB_DEBUG
2030 && TREE_CODE (decl
) == VAR_DECL
2031 && DECL_INITIAL (decl
)
2032 && ! DECL_EXTERNAL (decl
)
2033 && DECL_RTL (decl
) != 0
2034 && GET_CODE (DECL_RTL (decl
)) == MEM
)
2035 sdbout_toplevel_data (decl
);
2036 #endif /* SDB_DEBUGGING_INFO */
2037 #ifdef DWARF_DEBUGGING_INFO
2038 /* Output DWARF information for file-scope tentative data object
2039 declarations, file-scope (extern) function declarations (which
2040 had no corresponding body) and file-scope tagged type declarations
2041 and definitions which have not yet been forced out. */
2043 if (write_symbols
== DWARF_DEBUG
2044 && (TREE_CODE (decl
) != FUNCTION_DECL
|| !DECL_INITIAL (decl
)))
2045 dwarfout_file_scope_decl (decl
, 1);
2047 #ifdef DWARF2_DEBUGGING_INFO
2048 /* Output DWARF2 information for file-scope tentative data object
2049 declarations, file-scope (extern) function declarations (which
2050 had no corresponding body) and file-scope tagged type declarations
2051 and definitions which have not yet been forced out. */
2053 if (write_symbols
== DWARF2_DEBUG
2054 && (TREE_CODE (decl
) != FUNCTION_DECL
|| !DECL_INITIAL (decl
)))
2055 dwarf2out_decl (decl
);
2057 timevar_pop (TV_SYMOUT
);
2061 /* Save the current INPUT_FILENAME and LINENO on the top entry in the
2062 INPUT_FILE_STACK. Push a new entry for FILE and LINE, and set the
2063 INPUT_FILENAME and LINENO accordingly. */
2066 push_srcloc (file
, line
)
2070 struct file_stack
*fs
;
2072 if (input_file_stack
)
2074 input_file_stack
->name
= input_filename
;
2075 input_file_stack
->line
= lineno
;
2078 fs
= (struct file_stack
*) xmalloc (sizeof (struct file_stack
));
2079 fs
->name
= input_filename
= file
;
2080 fs
->line
= lineno
= line
;
2081 fs
->indent_level
= 0;
2082 fs
->next
= input_file_stack
;
2083 input_file_stack
= fs
;
2084 input_file_stack_tick
++;
2087 /* Pop the top entry off the stack of presently open source files.
2088 Restore the INPUT_FILENAME and LINENO from the new topmost entry on
2094 struct file_stack
*fs
;
2096 fs
= input_file_stack
;
2097 input_file_stack
= fs
->next
;
2099 input_file_stack_tick
++;
2100 /* The initial souce file is never popped. */
2101 if (!input_file_stack
)
2103 input_filename
= input_file_stack
->name
;
2104 lineno
= input_file_stack
->line
;
2107 /* Compile an entire file of output from cpp, named NAME.
2108 Write a file of assembly output and various debugging dumps. */
2116 int name_specified
= name
!= 0;
2118 if (dump_base_name
== 0)
2119 dump_base_name
= name
? name
: "gccdump";
2124 /* Start timing total execution time. */
2127 timevar_start (TV_TOTAL
);
2129 /* Initialize data in various passes. */
2133 name
= init_parse (name
);
2134 init_emit_once (debug_info_level
== DINFO_LEVEL_NORMAL
2135 || debug_info_level
== DINFO_LEVEL_VERBOSE
2136 || flag_test_coverage
2137 || warn_notreached
);
2140 init_decl_processing ();
2146 init_function_once ();
2147 init_stor_layout_once ();
2148 init_varasm_once ();
2150 /* The following initialization functions need to generate rtl, so
2151 provide a dummy function context for them. */
2152 init_dummy_function_start ();
2155 if (flag_caller_saves
)
2156 init_caller_save ();
2157 expand_dummy_function_end ();
2159 /* If auxiliary info generation is desired, open the output file.
2160 This goes in the same directory as the source file--unlike
2161 all the other output files. */
2162 if (flag_gen_aux_info
)
2164 aux_info_file
= fopen (aux_info_file_name
, "w");
2165 if (aux_info_file
== 0)
2166 pfatal_with_name (aux_info_file_name
);
2169 /* Open assembler code output file. Do this even if -fsyntax-only is on,
2170 because then the driver will have provided the name of a temporary
2171 file or bit bucket for us. */
2173 if (! name_specified
&& asm_file_name
== 0)
2174 asm_out_file
= stdout
;
2177 if (asm_file_name
== 0)
2179 int len
= strlen (dump_base_name
);
2180 char *dumpname
= (char *) xmalloc (len
+ 6);
2181 memcpy (dumpname
, dump_base_name
, len
+ 1);
2182 strip_off_ending (dumpname
, len
);
2183 strcat (dumpname
, ".s");
2184 asm_file_name
= dumpname
;
2186 if (!strcmp (asm_file_name
, "-"))
2187 asm_out_file
= stdout
;
2189 asm_out_file
= fopen (asm_file_name
, "w");
2190 if (asm_out_file
== 0)
2191 pfatal_with_name (asm_file_name
);
2194 #ifdef IO_BUFFER_SIZE
2195 setvbuf (asm_out_file
, (char *) xmalloc (IO_BUFFER_SIZE
),
2196 _IOFBF
, IO_BUFFER_SIZE
);
2199 if (ggc_p
&& name
!= 0)
2200 name
= ggc_alloc_string (name
, strlen (name
));
2202 input_filename
= name
;
2204 /* Put an entry on the input file stack for the main input file. */
2205 push_srcloc (input_filename
, 0);
2207 /* Perform language-specific initialization.
2208 This may set main_input_filename. */
2211 /* If the input doesn't start with a #line, use the input name
2212 as the official input file name. */
2213 if (main_input_filename
== 0)
2214 main_input_filename
= name
;
2216 if (flag_syntax_only
)
2218 write_symbols
= NO_DEBUG
;
2220 profile_block_flag
= 0;
2224 ASM_FILE_START (asm_out_file
);
2226 #ifdef ASM_COMMENT_START
2227 if (flag_verbose_asm
)
2229 /* Print the list of options in effect. */
2230 print_version (asm_out_file
, ASM_COMMENT_START
);
2231 print_switch_values (asm_out_file
, 0, MAX_LINE
,
2232 ASM_COMMENT_START
, " ", "\n");
2233 /* Add a blank line here so it appears in assembler output but not
2235 fprintf (asm_out_file
, "\n");
2239 /* Output something to inform GDB that this compilation was by GCC. */
2240 #ifndef ASM_IDENTIFY_GCC
2241 fprintf (asm_out_file
, "gcc2_compiled.:\n");
2243 ASM_IDENTIFY_GCC (asm_out_file
);
2246 /* Output something to identify which front-end produced this file. */
2247 #ifdef ASM_IDENTIFY_LANGUAGE
2248 ASM_IDENTIFY_LANGUAGE (asm_out_file
);
2250 } /* ! flag_syntax_only */
2252 #ifndef ASM_OUTPUT_SECTION_NAME
2253 if (flag_function_sections
)
2255 warning ("-ffunction-sections not supported for this target.");
2256 flag_function_sections
= 0;
2258 if (flag_data_sections
)
2260 warning ("-fdata-sections not supported for this target.");
2261 flag_data_sections
= 0;
2265 if (flag_function_sections
2266 && (profile_flag
|| profile_block_flag
))
2268 warning ("-ffunction-sections disabled; it makes profiling impossible.");
2269 flag_function_sections
= 0;
2272 #ifndef OBJECT_FORMAT_ELF
2273 if (flag_function_sections
&& write_symbols
!= NO_DEBUG
)
2274 warning ("-ffunction-sections may affect debugging on some targets.");
2277 /* ??? Note: There used to be a conditional here
2278 to call assemble_zeros without fail if DBX_DEBUGGING_INFO is defined.
2279 This was to guarantee separation between gcc_compiled. and
2280 the first function, for the sake of dbx on Suns.
2281 However, having the extra zero here confused the Emacs
2282 code for unexec, and might confuse other programs too.
2283 Therefore, I took out that change.
2284 In future versions we should find another way to solve
2285 that dbx problem. -- rms, 23 May 93. */
2287 /* Don't let the first function fall at the same address
2288 as gcc_compiled., if profiling. */
2289 if (profile_flag
|| profile_block_flag
)
2291 /* It's best if we can write a nop here since some
2292 assemblers don't tolerate zeros in the text section. */
2293 output_asm_insn (get_insn_template (CODE_FOR_nop
, NULL
), NULL_PTR
);
2296 /* If dbx symbol table desired, initialize writing it
2297 and output the predefined types. */
2298 timevar_push (TV_SYMOUT
);
2299 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
2300 if (write_symbols
== DBX_DEBUG
|| write_symbols
== XCOFF_DEBUG
)
2301 dbxout_init (asm_out_file
, main_input_filename
, getdecls ());
2303 #ifdef SDB_DEBUGGING_INFO
2304 if (write_symbols
== SDB_DEBUG
)
2305 sdbout_init (asm_out_file
, main_input_filename
, getdecls ());
2307 #ifdef DWARF_DEBUGGING_INFO
2308 if (write_symbols
== DWARF_DEBUG
)
2309 dwarfout_init (asm_out_file
, main_input_filename
);
2311 #ifdef DWARF2_UNWIND_INFO
2312 if (dwarf2out_do_frame ())
2313 dwarf2out_frame_init ();
2315 #ifdef DWARF2_DEBUGGING_INFO
2316 if (write_symbols
== DWARF2_DEBUG
)
2317 dwarf2out_init (asm_out_file
, main_input_filename
);
2319 timevar_pop (TV_SYMOUT
);
2321 /* Initialize yet another pass. */
2323 init_final (main_input_filename
);
2324 init_branch_prob (dump_base_name
);
2326 timevar_push (TV_PARSE
);
2328 /* Call the parser, which parses the entire file
2329 (calling rest_of_compilation for each function). */
2331 if (yyparse () != 0)
2333 if (errorcount
== 0)
2334 fnotice (stderr
, "Errors detected in input file (your bison.simple is out of date)\n");
2336 /* In case there were missing closebraces,
2337 get us back to the global binding level. */
2338 while (! global_bindings_p ())
2342 /* Compilation is now finished except for writing
2343 what's left of the symbol table output. */
2345 timevar_pop (TV_PARSE
);
2347 if (flag_syntax_only
)
2350 globals
= getdecls ();
2352 /* Really define vars that have had only a tentative definition.
2353 Really output inline functions that must actually be callable
2354 and have not been output so far. */
2357 int len
= list_length (globals
);
2358 tree
*vec
= (tree
*) xmalloc (sizeof (tree
) * len
);
2362 /* Process the decls in reverse order--earliest first.
2363 Put them into VEC from back to front, then take out from front. */
2365 for (i
= 0, decl
= globals
; i
< len
; i
++, decl
= TREE_CHAIN (decl
))
2366 vec
[len
- i
- 1] = decl
;
2368 wrapup_global_declarations (vec
, len
);
2370 /* This must occur after the loop to output deferred functions. Else
2371 the profiler initializer would not be emitted if all the functions
2372 in this compilation unit were deferred.
2374 output_func_start_profiler can not cause any additional functions or
2375 data to need to be output, so it need not be in the deferred function
2377 output_func_start_profiler ();
2379 /* Now that all possible functions have been output, we can dump
2380 the exception table. */
2382 #ifndef IA64_UNWIND_INFO
2383 output_exception_table ();
2385 free_exception_table ();
2387 check_global_declarations (vec
, len
);
2393 /* Write out any pending weak symbol declarations. */
2397 /* Do dbx symbols. */
2398 timevar_push (TV_SYMOUT
);
2399 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
2400 if (write_symbols
== DBX_DEBUG
|| write_symbols
== XCOFF_DEBUG
)
2401 dbxout_finish (asm_out_file
, main_input_filename
);
2404 #ifdef DWARF_DEBUGGING_INFO
2405 if (write_symbols
== DWARF_DEBUG
)
2409 #ifdef DWARF2_UNWIND_INFO
2410 if (dwarf2out_do_frame ())
2411 dwarf2out_frame_finish ();
2414 #ifdef DWARF2_DEBUGGING_INFO
2415 if (write_symbols
== DWARF2_DEBUG
)
2416 dwarf2out_finish ();
2418 timevar_pop (TV_SYMOUT
);
2420 /* Output some stuff at end of file if nec. */
2422 end_final (dump_base_name
);
2424 if (profile_arc_flag
|| flag_test_coverage
|| flag_branch_probabilities
)
2426 timevar_push (TV_DUMP
);
2427 open_dump_file (DFI_bp
, NULL
);
2431 close_dump_file (DFI_bp
, NULL
, NULL_RTX
);
2432 timevar_pop (TV_DUMP
);
2436 ASM_FILE_END (asm_out_file
);
2439 /* Language-specific end of compilation actions. */
2443 /* Close the dump files. */
2445 if (flag_gen_aux_info
)
2447 fclose (aux_info_file
);
2449 unlink (aux_info_file_name
);
2452 if (optimize
> 0 && open_dump_file (DFI_combine
, NULL
))
2454 timevar_push (TV_DUMP
);
2455 dump_combine_total_stats (rtl_dump_file
);
2456 close_dump_file (DFI_combine
, NULL
, NULL_RTX
);
2457 timevar_pop (TV_DUMP
);
2460 /* Close non-debugging input and output files. Take special care to note
2461 whether fclose returns an error, since the pages might still be on the
2462 buffer chain while the file is open. */
2466 if (ferror (asm_out_file
) != 0 || fclose (asm_out_file
) != 0)
2467 fatal_io_error (asm_file_name
);
2469 /* Do whatever is necessary to finish printing the graphs. */
2470 if (graph_dump_format
!= no_graph
)
2474 for (i
= 0; i
< DFI_MAX
; ++i
)
2475 if (dump_file
[i
].initialized
&& dump_file
[i
].graph_dump_p
)
2480 sprintf (seq
, ".%02d.", i
);
2481 suffix
= concat (seq
, dump_file
[i
].extension
, NULL
);
2482 finish_graph_dump_file (dump_base_name
, suffix
);
2488 ggc_print_statistics ();
2490 /* Free up memory for the benefit of leak detectors. */
2493 /* Stop timing total execution time. */
2494 timevar_stop (TV_TOTAL
);
2496 /* Print the times. */
2498 timevar_print (stderr
);
2501 /* This is called from various places for FUNCTION_DECL, VAR_DECL,
2502 and TYPE_DECL nodes.
2504 This does nothing for local (non-static) variables, unless the
2505 variable is a register variable with an ASMSPEC. In that case, or
2506 if the variable is not an automatice, it sets up the RTL and
2507 outputs any assembler code (label definition, storage allocation
2508 and initialization).
2510 DECL is the declaration. If ASMSPEC is nonzero, it specifies
2511 the assembler symbol name to be used. TOP_LEVEL is nonzero
2512 if this declaration is not within a function. */
2515 rest_of_decl_compilation (decl
, asmspec
, top_level
, at_end
)
2517 const char *asmspec
;
2521 /* Declarations of variables, and of functions defined elsewhere. */
2523 /* The most obvious approach, to put an #ifndef around where
2524 this macro is used, doesn't work since it's inside a macro call. */
2525 #ifndef ASM_FINISH_DECLARE_OBJECT
2526 #define ASM_FINISH_DECLARE_OBJECT(FILE, DECL, TOP, END)
2529 /* Forward declarations for nested functions are not "external",
2530 but we need to treat them as if they were. */
2531 if (TREE_STATIC (decl
) || DECL_EXTERNAL (decl
)
2532 || TREE_CODE (decl
) == FUNCTION_DECL
)
2534 timevar_push (TV_VARCONST
);
2535 make_decl_rtl (decl
, asmspec
, top_level
);
2536 /* Initialized extern variable exists to be replaced
2537 with its value, or represents something that will be
2538 output in another file. */
2539 if (! (TREE_CODE (decl
) == VAR_DECL
2540 && DECL_EXTERNAL (decl
) && TREE_READONLY (decl
)
2541 && DECL_INITIAL (decl
) != 0
2542 && DECL_INITIAL (decl
) != error_mark_node
))
2543 /* Don't output anything
2544 when a tentative file-scope definition is seen.
2545 But at end of compilation, do output code for them. */
2546 if (! (! at_end
&& top_level
2547 && (DECL_INITIAL (decl
) == 0
2548 || DECL_INITIAL (decl
) == error_mark_node
)))
2549 assemble_variable (decl
, top_level
, at_end
, 0);
2550 if (decl
== last_assemble_variable_decl
)
2552 ASM_FINISH_DECLARE_OBJECT (asm_out_file
, decl
,
2555 timevar_pop (TV_VARCONST
);
2557 else if (DECL_REGISTER (decl
) && asmspec
!= 0)
2559 if (decode_reg_name (asmspec
) >= 0)
2561 DECL_RTL (decl
) = 0;
2562 make_decl_rtl (decl
, asmspec
, top_level
);
2565 error ("invalid register name `%s' for register variable", asmspec
);
2567 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
2568 else if ((write_symbols
== DBX_DEBUG
|| write_symbols
== XCOFF_DEBUG
)
2569 && TREE_CODE (decl
) == TYPE_DECL
)
2571 timevar_push (TV_SYMOUT
);
2572 dbxout_symbol (decl
, 0);
2573 timevar_pop (TV_SYMOUT
);
2576 #ifdef SDB_DEBUGGING_INFO
2577 else if (write_symbols
== SDB_DEBUG
&& top_level
2578 && TREE_CODE (decl
) == TYPE_DECL
)
2580 timevar_push (TV_SYMOUT
);
2581 sdbout_symbol (decl
, 0);
2582 timevar_pop (TV_SYMOUT
);
2587 /* Called after finishing a record, union or enumeral type. */
2590 rest_of_type_compilation (type
, toplev
)
2591 #if defined(DBX_DEBUGGING_INFO) || defined(XCOFF_DEBUGGING_INFO) || defined (SDB_DEBUGGING_INFO)
2595 tree type ATTRIBUTE_UNUSED
;
2596 int toplev ATTRIBUTE_UNUSED
;
2599 timevar_push (TV_SYMOUT
);
2600 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
2601 if (write_symbols
== DBX_DEBUG
|| write_symbols
== XCOFF_DEBUG
)
2602 dbxout_symbol (TYPE_STUB_DECL (type
), !toplev
);
2604 #ifdef SDB_DEBUGGING_INFO
2605 if (write_symbols
== SDB_DEBUG
)
2606 sdbout_symbol (TYPE_STUB_DECL (type
), !toplev
);
2608 #ifdef DWARF2_DEBUGGING_INFO
2609 if (write_symbols
== DWARF2_DEBUG
&& toplev
)
2610 dwarf2out_decl (TYPE_STUB_DECL (type
));
2612 timevar_pop (TV_SYMOUT
);
2615 /* DECL is an inline function, whose body is present, but which is not
2616 being output at this point. (We're putting that off until we need
2617 to do it.) If there are any actions that need to take place,
2618 including the emission of debugging information for the function,
2619 this is where they should go. This function may be called by
2620 language-dependent code for front-ends that do not even generate
2621 RTL for functions that don't need to be put out. */
2624 note_deferral_of_defined_inline_function (decl
)
2625 tree decl ATTRIBUTE_UNUSED
;
2627 #ifdef DWARF_DEBUGGING_INFO
2628 /* Generate the DWARF info for the "abstract" instance of a function
2629 which we may later generate inlined and/or out-of-line instances
2631 if (write_symbols
== DWARF_DEBUG
&& DECL_INLINE (decl
))
2633 /* The front-end may not have set CURRENT_FUNCTION_DECL, but the
2634 DWARF code expects it to be set in this case. Intuitively,
2635 DECL is the function we just finished defining, so setting
2636 CURRENT_FUNCTION_DECL is sensible. */
2637 tree saved_cfd
= current_function_decl
;
2638 current_function_decl
= decl
;
2640 /* Let the DWARF code do its work. */
2641 set_decl_abstract_flags (decl
, 1);
2642 dwarfout_file_scope_decl (decl
, 0);
2643 set_decl_abstract_flags (decl
, 0);
2645 /* Reset CURRENT_FUNCTION_DECL. */
2646 current_function_decl
= saved_cfd
;
2651 /* This is called from finish_function (within yyparse)
2652 after each top-level definition is parsed.
2653 It is supposed to compile that function or variable
2654 and output the assembler code for it.
2655 After we return, the tree storage is freed. */
2658 rest_of_compilation (decl
)
2664 int rebuild_label_notes_after_reload
;
2665 int register_life_up_to_date
;
2667 timevar_push (TV_REST_OF_COMPILATION
);
2669 /* Now that we're out of the frontend, we shouldn't have any more
2670 CONCATs anywhere. */
2671 generating_concat_p
= 0;
2673 /* When processing delayed functions, prepare_function_start() won't
2674 have been run to re-initialize it. */
2675 cse_not_expected
= ! optimize
;
2677 /* First, make sure that NOTE_BLOCK is set correctly for each
2678 NOTE_INSN_BLOCK_BEG/NOTE_INSN_BLOCK_END note. */
2679 if (!cfun
->x_whole_function_mode_p
)
2682 /* Then remove any notes we don't need. That will make iterating
2683 over the instruction sequence faster, and allow the garbage
2684 collector to reclaim the memory used by the notes. */
2685 remove_unnecessary_notes ();
2687 /* In function-at-a-time mode, we do not attempt to keep the BLOCK
2688 tree in sensible shape. So, we just recalculate it here. */
2689 if (cfun
->x_whole_function_mode_p
)
2692 /* If we are reconsidering an inline function
2693 at the end of compilation, skip the stuff for making it inline. */
2695 if (DECL_SAVED_INSNS (decl
) == 0)
2701 /* If this is nested inside an inlined external function, pretend
2702 it was only declared. Since we cannot inline such functions,
2703 generating code for this one is not only not necessary but will
2704 confuse some debugging output writers. */
2705 for (parent
= DECL_CONTEXT (current_function_decl
);
2706 parent
!= NULL_TREE
;
2707 parent
= get_containing_scope (parent
))
2708 if (TREE_CODE (parent
) == FUNCTION_DECL
2709 && DECL_INLINE (parent
) && DECL_EXTERNAL (parent
))
2711 DECL_INITIAL (decl
) = 0;
2712 goto exit_rest_of_compilation
;
2715 /* If requested, consider whether to make this function inline. */
2716 if (DECL_INLINE (decl
) || flag_inline_functions
)
2718 timevar_push (TV_INTEGRATION
);
2719 lose
= function_cannot_inline_p (decl
);
2720 timevar_pop (TV_INTEGRATION
);
2721 if (lose
|| ! optimize
)
2723 if (warn_inline
&& DECL_INLINE (decl
))
2724 warning_with_decl (decl
, lose
);
2725 DECL_ABSTRACT_ORIGIN (decl
) = 0;
2726 /* Don't really compile an extern inline function.
2727 If we can't make it inline, pretend
2728 it was only declared. */
2729 if (DECL_EXTERNAL (decl
))
2731 DECL_INITIAL (decl
) = 0;
2732 goto exit_rest_of_compilation
;
2736 /* ??? Note that this has the effect of making it look
2737 like "inline" was specified for a function if we choose
2738 to inline it. This isn't quite right, but it's
2739 probably not worth the trouble to fix. */
2740 inlinable
= DECL_INLINE (decl
) = 1;
2743 insns
= get_insns ();
2745 /* Dump the rtl code if we are dumping rtl. */
2747 if (open_dump_file (DFI_rtl
, decl
))
2749 if (DECL_SAVED_INSNS (decl
))
2750 fprintf (rtl_dump_file
, ";; (integrable)\n\n");
2751 close_dump_file (DFI_rtl
, print_rtl
, insns
);
2754 /* If function is inline, and we don't yet know whether to
2755 compile it by itself, defer decision till end of compilation.
2756 finish_compilation will call rest_of_compilation again
2757 for those functions that need to be output. Also defer those
2758 functions that we are supposed to defer. */
2761 || (DECL_INLINE (decl
)
2762 && ((! TREE_PUBLIC (decl
) && ! TREE_ADDRESSABLE (decl
)
2763 && ! flag_keep_inline_functions
)
2764 || DECL_EXTERNAL (decl
))))
2765 DECL_DEFER_OUTPUT (decl
) = 1;
2767 if (DECL_INLINE (decl
))
2768 /* DWARF wants seperate debugging info for abstract and
2769 concrete instances of all inline functions, including those
2770 declared inline but not inlined, and those inlined even
2771 though they weren't declared inline. Conveniently, that's
2772 what DECL_INLINE means at this point. */
2773 note_deferral_of_defined_inline_function (decl
);
2775 if (DECL_DEFER_OUTPUT (decl
))
2777 /* If -Wreturn-type, we have to do a bit of compilation.
2778 However, if we just fall through we will call
2779 save_for_inline_copying() which results in excessive
2780 memory use. Instead, we just want to call
2781 jump_optimize() to figure out whether or not we can fall
2782 off the end of the function; we do the minimum amount of
2783 work necessary to make that safe. And, we set optimize
2784 to zero to keep jump_optimize from working too hard. */
2785 if (warn_return_type
)
2787 int saved_optimize
= optimize
;
2789 find_exception_handler_labels ();
2790 jump_optimize (insns
, !JUMP_CROSS_JUMP
, !JUMP_NOOP_MOVES
,
2791 !JUMP_AFTER_REGSCAN
);
2792 optimize
= saved_optimize
;
2795 current_function_nothrow
= nothrow_function_p ();
2796 if (current_function_nothrow
)
2797 /* Now we know that this can't throw; set the flag for the benefit
2798 of other functions later in this translation unit. */
2799 TREE_NOTHROW (current_function_decl
) = 1;
2801 timevar_push (TV_INTEGRATION
);
2802 save_for_inline_nocopy (decl
);
2803 timevar_pop (TV_INTEGRATION
);
2804 DECL_SAVED_INSNS (decl
)->inlinable
= inlinable
;
2805 goto exit_rest_of_compilation
;
2808 /* If specified extern inline but we aren't inlining it, we are
2809 done. This goes for anything that gets here with DECL_EXTERNAL
2810 set, not just things with DECL_INLINE. */
2811 if (DECL_EXTERNAL (decl
))
2812 goto exit_rest_of_compilation
;
2815 init_EXPR_INSN_LIST_cache ();
2820 /* Initialize some variables used by the optimizers. */
2821 init_function_for_compilation ();
2823 if (! DECL_DEFER_OUTPUT (decl
))
2824 TREE_ASM_WRITTEN (decl
) = 1;
2826 /* Now that integrate will no longer see our rtl, we need not distinguish
2827 between the return value of this function and the return value of called
2829 rtx_equal_function_value_matters
= 0;
2831 /* Don't return yet if -Wreturn-type; we need to do jump_optimize. */
2832 if ((rtl_dump_and_exit
|| flag_syntax_only
) && !warn_return_type
)
2833 goto exit_rest_of_compilation
;
2835 /* Emit code to get eh context, if needed. */
2838 /* We may have potential sibling or tail recursion sites. Select one
2839 (of possibly multiple) methods of performing the call. */
2840 if (flag_optimize_sibling_calls
)
2842 timevar_push (TV_JUMP
);
2843 open_dump_file (DFI_sibling
, decl
);
2845 optimize_sibling_and_tail_recursive_calls ();
2847 close_dump_file (DFI_sibling
, print_rtl
, get_insns ());
2848 timevar_pop (TV_JUMP
);
2852 /* If we are doing position-independent code generation, now
2853 is the time to output special prologues and epilogues.
2854 We do not want to do this earlier, because it just clutters
2855 up inline functions with meaningless insns. */
2860 /* From now on, allocate rtl in current_obstack, not in saveable_obstack.
2861 Note that that may have been done above, in save_for_inline_copying.
2862 The call to resume_temporary_allocation near the end of this function
2863 goes back to the usual state of affairs. This must be done after
2864 we've built up any unwinders for exception handling, and done
2865 the FINALIZE_PIC work, if necessary. */
2867 rtl_in_current_obstack ();
2869 insns
= get_insns ();
2871 /* Copy any shared structure that should not be shared. */
2872 unshare_all_rtl (current_function_decl
, insns
);
2874 #ifdef SETJMP_VIA_SAVE_AREA
2875 /* This must be performed before virutal register instantiation. */
2876 if (current_function_calls_alloca
)
2877 optimize_save_area_alloca (insns
);
2880 /* Instantiate all virtual registers. */
2881 instantiate_virtual_regs (current_function_decl
, insns
);
2883 /* Find all the EH handlers. */
2884 find_exception_handler_labels ();
2886 open_dump_file (DFI_jump
, decl
);
2888 /* Always do one jump optimization pass to ensure that JUMP_LABEL fields
2889 are initialized and to compute whether control can drop off the end
2892 timevar_push (TV_JUMP
);
2893 /* Turn NOTE_INSN_EXPECTED_VALUE into REG_BR_PROB. Do this
2894 before jump optimization switches branch directions. */
2895 expected_value_to_br_prob ();
2897 reg_scan (insns
, max_reg_num (), 0);
2898 jump_optimize (insns
, !JUMP_CROSS_JUMP
, !JUMP_NOOP_MOVES
,
2899 JUMP_AFTER_REGSCAN
);
2901 timevar_pop (TV_JUMP
);
2903 /* Now is when we stop if -fsyntax-only and -Wreturn-type. */
2904 if (rtl_dump_and_exit
|| flag_syntax_only
|| DECL_DEFER_OUTPUT (decl
))
2906 close_dump_file (DFI_jump
, print_rtl
, insns
);
2907 goto exit_rest_of_compilation
;
2910 timevar_push (TV_JUMP
);
2914 find_basic_blocks (insns
, max_reg_num (), rtl_dump_file
);
2915 cleanup_cfg (insns
);
2917 /* ??? Run if-conversion before delete_null_pointer_checks,
2918 since the later does not preserve the CFG. This should
2919 be changed -- no since converting if's that are going to
2921 timevar_push (TV_IFCVT
);
2923 timevar_pop (TV_IFCVT
);
2925 /* Try to identify useless null pointer tests and delete them. */
2926 if (flag_delete_null_pointer_checks
)
2927 delete_null_pointer_checks (insns
);
2930 /* Jump optimization, and the removal of NULL pointer checks, may
2931 have reduced the number of instructions substantially. CSE, and
2932 future passes, allocate arrays whose dimensions involve the
2933 maximum instruction UID, so if we can reduce the maximum UID
2934 we'll save big on memory. */
2935 renumber_insns (rtl_dump_file
);
2936 timevar_pop (TV_JUMP
);
2938 close_dump_file (DFI_jump
, print_rtl
, insns
);
2943 /* Perform common subexpression elimination.
2944 Nonzero value from `cse_main' means that jumps were simplified
2945 and some code may now be unreachable, so do
2946 jump optimization again. */
2950 open_dump_file (DFI_cse
, decl
);
2951 timevar_push (TV_CSE
);
2953 reg_scan (insns
, max_reg_num (), 1);
2955 if (flag_thread_jumps
)
2957 timevar_push (TV_JUMP
);
2958 thread_jumps (insns
, max_reg_num (), 1);
2959 timevar_pop (TV_JUMP
);
2962 tem
= cse_main (insns
, max_reg_num (), 0, rtl_dump_file
);
2964 /* If we are not running the second CSE pass, then we are no longer
2965 expecting CSE to be run. */
2966 cse_not_expected
= !flag_rerun_cse_after_loop
;
2968 if (tem
|| optimize
> 1)
2970 timevar_push (TV_JUMP
);
2971 jump_optimize (insns
, !JUMP_CROSS_JUMP
, !JUMP_NOOP_MOVES
,
2972 !JUMP_AFTER_REGSCAN
);
2973 timevar_pop (TV_JUMP
);
2976 /* Run this after jump optmizations remove all the unreachable code
2977 so that unreachable code will not keep values live. */
2978 delete_trivially_dead_insns (insns
, max_reg_num ());
2980 /* Try to identify useless null pointer tests and delete them. */
2981 if (flag_delete_null_pointer_checks
)
2983 timevar_push (TV_JUMP
);
2984 find_basic_blocks (insns
, max_reg_num (), rtl_dump_file
);
2986 cleanup_cfg (insns
);
2988 delete_null_pointer_checks (insns
);
2989 timevar_pop (TV_JUMP
);
2992 /* The second pass of jump optimization is likely to have
2993 removed a bunch more instructions. */
2994 renumber_insns (rtl_dump_file
);
2996 timevar_pop (TV_CSE
);
2997 close_dump_file (DFI_cse
, print_rtl
, insns
);
3000 open_dump_file (DFI_addressof
, decl
);
3002 purge_addressof (insns
);
3003 reg_scan (insns
, max_reg_num (), 1);
3005 close_dump_file (DFI_addressof
, print_rtl
, insns
);
3010 if (optimize
> 0 && flag_ssa
)
3012 /* Convert to SSA form. */
3014 timevar_push (TV_TO_SSA
);
3015 open_dump_file (DFI_ssa
, decl
);
3017 find_basic_blocks (insns
, max_reg_num (), rtl_dump_file
);
3018 cleanup_cfg (insns
);
3021 close_dump_file (DFI_ssa
, print_rtl_with_bb
, insns
);
3022 timevar_pop (TV_TO_SSA
);
3024 /* The SSA implementation uses basic block numbers in its phi
3025 nodes. Thus, changing the control-flow graph or the basic
3026 blocks, e.g., calling find_basic_blocks () or cleanup_cfg (),
3027 may cause problems. */
3031 /* Remove dead code. */
3033 timevar_push (TV_DEAD_CODE_ELIM
);
3034 open_dump_file (DFI_dce
, decl
);
3036 insns
= get_insns ();
3037 eliminate_dead_code();
3039 close_dump_file (DFI_dce
, print_rtl_with_bb
, insns
);
3040 timevar_pop (TV_DEAD_CODE_ELIM
);
3043 /* Convert from SSA form. */
3045 timevar_push (TV_FROM_SSA
);
3046 open_dump_file (DFI_ussa
, decl
);
3048 convert_from_ssa ();
3049 /* New registers have been created. Rescan their usage. */
3050 reg_scan (insns
, max_reg_num (), 1);
3051 /* Life analysis used in SSA adds log_links but these
3052 shouldn't be there until the flow stage, so clear
3054 clear_log_links (insns
);
3056 close_dump_file (DFI_ussa
, print_rtl_with_bb
, insns
);
3057 timevar_pop (TV_FROM_SSA
);
3063 /* Perform global cse. */
3065 if (optimize
> 0 && flag_gcse
)
3067 timevar_push (TV_GCSE
);
3068 open_dump_file (DFI_gcse
, decl
);
3070 find_basic_blocks (insns
, max_reg_num (), rtl_dump_file
);
3071 cleanup_cfg (insns
);
3072 tem
= gcse_main (insns
, rtl_dump_file
);
3074 /* If gcse altered any jumps, rerun jump optimizations to clean
3078 timevar_push (TV_JUMP
);
3079 jump_optimize (insns
, !JUMP_CROSS_JUMP
, !JUMP_NOOP_MOVES
,
3080 !JUMP_AFTER_REGSCAN
);
3081 timevar_pop (TV_JUMP
);
3084 close_dump_file (DFI_gcse
, print_rtl
, insns
);
3085 timevar_pop (TV_GCSE
);
3091 /* Move constant computations out of loops. */
3095 timevar_push (TV_LOOP
);
3096 open_dump_file (DFI_loop
, decl
);
3098 if (flag_rerun_loop_opt
)
3100 /* We only want to perform unrolling once. */
3102 loop_optimize (insns
, rtl_dump_file
, 0);
3104 /* The first call to loop_optimize makes some instructions
3105 trivially dead. We delete those instructions now in the
3106 hope that doing so will make the heuristics in loop work
3107 better and possibly speed up compilation. */
3108 delete_trivially_dead_insns (insns
, max_reg_num ());
3110 /* The regscan pass is currently necessary as the alias
3111 analysis code depends on this information. */
3112 reg_scan (insns
, max_reg_num (), 1);
3114 loop_optimize (insns
, rtl_dump_file
,
3115 (flag_unroll_loops
? LOOP_UNROLL
: 0) | LOOP_BCT
);
3117 close_dump_file (DFI_loop
, print_rtl
, insns
);
3118 timevar_pop (TV_LOOP
);
3126 timevar_push (TV_CSE2
);
3127 open_dump_file (DFI_cse2
, decl
);
3129 if (flag_rerun_cse_after_loop
)
3131 /* Running another jump optimization pass before the second
3132 cse pass sometimes simplifies the RTL enough to allow
3133 the second CSE pass to do a better job. Jump_optimize can change
3134 max_reg_num so we must rerun reg_scan afterwards.
3135 ??? Rework to not call reg_scan so often. */
3136 timevar_push (TV_JUMP
);
3138 reg_scan (insns
, max_reg_num (), 0);
3139 jump_optimize (insns
, !JUMP_CROSS_JUMP
,
3140 !JUMP_NOOP_MOVES
, JUMP_AFTER_REGSCAN
);
3142 timevar_push (TV_IFCVT
);
3144 find_basic_blocks (insns
, max_reg_num (), rtl_dump_file
);
3145 cleanup_cfg (insns
);
3148 timevar_pop(TV_IFCVT
);
3150 timevar_pop (TV_JUMP
);
3152 reg_scan (insns
, max_reg_num (), 0);
3153 tem
= cse_main (insns
, max_reg_num (), 1, rtl_dump_file
);
3157 timevar_push (TV_JUMP
);
3158 jump_optimize (insns
, !JUMP_CROSS_JUMP
,
3159 !JUMP_NOOP_MOVES
, !JUMP_AFTER_REGSCAN
);
3160 timevar_pop (TV_JUMP
);
3164 if (flag_thread_jumps
)
3166 /* This pass of jump threading straightens out code
3167 that was kinked by loop optimization. */
3168 timevar_push (TV_JUMP
);
3169 reg_scan (insns
, max_reg_num (), 0);
3170 thread_jumps (insns
, max_reg_num (), 0);
3171 timevar_pop (TV_JUMP
);
3174 close_dump_file (DFI_cse2
, print_rtl
, insns
);
3175 timevar_pop (TV_CSE2
);
3181 cse_not_expected
= 1;
3185 /* Do control and data flow analysis; wrote some of the results to
3188 timevar_push (TV_FLOW
);
3189 open_dump_file (DFI_cfg
, decl
);
3191 find_basic_blocks (insns
, max_reg_num (), rtl_dump_file
);
3192 cleanup_cfg (insns
);
3194 close_dump_file (DFI_cfg
, print_rtl_with_bb
, insns
);
3196 if (profile_arc_flag
|| flag_test_coverage
|| flag_branch_probabilities
)
3198 timevar_push (TV_BRANCH_PROB
);
3199 open_dump_file (DFI_bp
, decl
);
3203 close_dump_file (DFI_bp
, print_rtl_with_bb
, insns
);
3204 timevar_pop (TV_BRANCH_PROB
);
3207 open_dump_file (DFI_life
, decl
);
3212 /* Discover and record the loop depth at the head of each basic
3213 block. The loop infrastructure does the real job for us. */
3214 flow_loops_find (&loops
, LOOP_TREE
);
3216 /* Estimate using heuristics if no profiling info is available. */
3217 estimate_probability (&loops
);
3220 flow_loops_dump (&loops
, rtl_dump_file
, NULL
, 0);
3222 flow_loops_free (&loops
);
3224 life_analysis (insns
, rtl_dump_file
, PROP_FINAL
);
3225 mark_constant_function ();
3226 timevar_pop (TV_FLOW
);
3228 register_life_up_to_date
= 1;
3231 if (warn_uninitialized
|| extra_warnings
)
3233 uninitialized_vars_warning (DECL_INITIAL (decl
));
3235 setjmp_args_warning ();
3238 close_dump_file (DFI_life
, print_rtl_with_bb
, insns
);
3243 /* If -opt, try combining insns through substitution. */
3247 int rebuild_jump_labels_after_combine
= 0;
3249 timevar_push (TV_COMBINE
);
3250 open_dump_file (DFI_combine
, decl
);
3252 rebuild_jump_labels_after_combine
3253 = combine_instructions (insns
, max_reg_num ());
3255 /* Combining insns may have turned an indirect jump into a
3256 direct jump. Rebuid the JUMP_LABEL fields of jumping
3258 if (rebuild_jump_labels_after_combine
)
3260 timevar_push (TV_JUMP
);
3261 rebuild_jump_labels (insns
);
3262 timevar_pop (TV_JUMP
);
3264 timevar_push (TV_FLOW
);
3265 find_basic_blocks (insns
, max_reg_num (), rtl_dump_file
);
3266 cleanup_cfg (insns
);
3268 /* Blimey. We've got to have the CFG up to date for the call to
3269 if_convert below. However, the random deletion of blocks
3270 without updating life info can wind up with Wierd Stuff in
3271 global_live_at_end. We then run sched1, which updates things
3272 properly, discovers the wierdness and aborts. */
3273 update_life_info (NULL
, UPDATE_LIFE_GLOBAL_RM_NOTES
,
3274 PROP_DEATH_NOTES
| PROP_KILL_DEAD_CODE
3275 | PROP_SCAN_DEAD_CODE
);
3277 timevar_pop (TV_FLOW
);
3280 close_dump_file (DFI_combine
, print_rtl_with_bb
, insns
);
3281 timevar_pop (TV_COMBINE
);
3287 /* Rerun if-conversion, as combine may have simplified things enough to
3288 now meet sequence length restrictions. */
3291 timevar_push (TV_IFCVT
);
3292 open_dump_file (DFI_ce
, decl
);
3298 close_dump_file (DFI_ce
, print_rtl_with_bb
, insns
);
3299 timevar_pop (TV_IFCVT
);
3302 /* Register allocation pre-pass, to reduce number of moves
3303 necessary for two-address machines. */
3304 if (optimize
> 0 && (flag_regmove
|| flag_expensive_optimizations
))
3306 timevar_push (TV_REGMOVE
);
3307 open_dump_file (DFI_regmove
, decl
);
3309 regmove_optimize (insns
, max_reg_num (), rtl_dump_file
);
3311 close_dump_file (DFI_regmove
, print_rtl_with_bb
, insns
);
3312 timevar_pop (TV_REGMOVE
);
3318 /* Any of the several passes since flow1 will have munged register
3319 lifetime data a bit. */
3321 register_life_up_to_date
= 0;
3323 #ifdef OPTIMIZE_MODE_SWITCHING
3326 timevar_push (TV_GCSE
);
3328 if (optimize_mode_switching (NULL_PTR
))
3330 /* We did work, and so had to regenerate global life information.
3331 Take advantage of this and don't re-recompute register life
3332 information below. */
3333 register_life_up_to_date
= 1;
3336 timevar_pop (TV_GCSE
);
3340 #ifdef INSN_SCHEDULING
3342 /* Print function header into sched dump now
3343 because doing the sched analysis makes some of the dump. */
3344 if (optimize
> 0 && flag_schedule_insns
)
3346 timevar_push (TV_SCHED
);
3347 open_dump_file (DFI_sched
, decl
);
3349 /* Do control and data sched analysis,
3350 and write some of the results to dump file. */
3352 schedule_insns (rtl_dump_file
);
3354 close_dump_file (DFI_sched
, print_rtl_with_bb
, insns
);
3355 timevar_pop (TV_SCHED
);
3360 /* Register lifetime information was updated as part of verifying
3362 register_life_up_to_date
= 1;
3366 /* Determine if the current function is a leaf before running reload
3367 since this can impact optimizations done by the prologue and
3368 epilogue thus changing register elimination offsets. */
3369 current_function_is_leaf
= leaf_function_p ();
3371 timevar_push (TV_LOCAL_ALLOC
);
3372 open_dump_file (DFI_lreg
, decl
);
3374 /* Allocate pseudo-regs that are used only within 1 basic block.
3376 RUN_JUMP_AFTER_RELOAD records whether or not we need to rerun the
3377 jump optimizer after register allocation and reloading are finished. */
3379 if (! register_life_up_to_date
)
3380 recompute_reg_usage (insns
, ! optimize_size
);
3381 regclass (insns
, max_reg_num (), rtl_dump_file
);
3382 rebuild_label_notes_after_reload
= local_alloc ();
3384 timevar_pop (TV_LOCAL_ALLOC
);
3386 if (dump_file
[DFI_lreg
].enabled
)
3388 timevar_push (TV_DUMP
);
3390 dump_flow_info (rtl_dump_file
);
3391 dump_local_alloc (rtl_dump_file
);
3393 close_dump_file (DFI_lreg
, print_rtl_with_bb
, insns
);
3394 timevar_pop (TV_DUMP
);
3400 timevar_push (TV_GLOBAL_ALLOC
);
3401 open_dump_file (DFI_greg
, decl
);
3403 /* If optimizing, allocate remaining pseudo-regs. Do the reload
3404 pass fixing up any insns that are invalid. */
3407 failure
= global_alloc (rtl_dump_file
);
3410 build_insn_chain (insns
);
3411 failure
= reload (insns
, 0);
3414 timevar_pop (TV_GLOBAL_ALLOC
);
3417 goto exit_rest_of_compilation
;
3422 /* Do a very simple CSE pass over just the hard registers. */
3425 timevar_push (TV_RELOAD_CSE_REGS
);
3426 reload_cse_regs (insns
);
3427 timevar_pop (TV_RELOAD_CSE_REGS
);
3430 /* If optimizing, then go ahead and split insns now since we are about
3431 to recompute flow information anyway. */
3434 int old_labelnum
= max_label_num ();
3436 split_all_insns (0);
3437 rebuild_label_notes_after_reload
|= old_labelnum
!= max_label_num ();
3440 /* Register allocation and reloading may have turned an indirect jump into
3441 a direct jump. If so, we must rebuild the JUMP_LABEL fields of
3442 jumping instructions. */
3443 if (rebuild_label_notes_after_reload
)
3445 timevar_push (TV_JUMP
);
3447 rebuild_jump_labels (insns
);
3449 timevar_pop (TV_JUMP
);
3452 if (dump_file
[DFI_greg
].enabled
)
3454 timevar_push (TV_DUMP
);
3456 dump_global_regs (rtl_dump_file
);
3458 close_dump_file (DFI_greg
, print_rtl_with_bb
, insns
);
3459 timevar_pop (TV_DUMP
);
3462 /* Re-create the death notes which were deleted during reload. */
3463 timevar_push (TV_FLOW2
);
3464 open_dump_file (DFI_flow2
, decl
);
3466 jump_optimize (insns
, !JUMP_CROSS_JUMP
,
3467 !JUMP_NOOP_MOVES
, !JUMP_AFTER_REGSCAN
);
3468 find_basic_blocks (insns
, max_reg_num (), rtl_dump_file
);
3470 /* On some machines, the prologue and epilogue code, or parts thereof,
3471 can be represented as RTL. Doing so lets us schedule insns between
3472 it and the rest of the code and also allows delayed branch
3473 scheduling to operate in the epilogue. */
3474 thread_prologue_and_epilogue_insns (insns
);
3478 cleanup_cfg (insns
);
3479 life_analysis (insns
, rtl_dump_file
, PROP_FINAL
);
3481 /* This is kind of a heuristic. We need to run combine_stack_adjustments
3482 even for machines with possibly nonzero RETURN_POPS_ARGS
3483 and ACCUMULATE_OUTGOING_ARGS. We expect that only ports having
3484 push instructions will have popping returns. */
3485 #ifndef PUSH_ROUNDING
3486 if (!ACCUMULATE_OUTGOING_ARGS
)
3488 combine_stack_adjustments ();
3494 flow2_completed
= 1;
3496 close_dump_file (DFI_flow2
, print_rtl_with_bb
, insns
);
3497 timevar_pop (TV_FLOW2
);
3501 timevar_push (TV_IFCVT2
);
3502 open_dump_file (DFI_ce2
, decl
);
3506 close_dump_file (DFI_ce2
, print_rtl_with_bb
, insns
);
3507 timevar_pop (TV_IFCVT2
);
3510 #ifdef HAVE_peephole2
3511 if (optimize
> 0 && flag_peephole2
)
3513 timevar_push (TV_PEEPHOLE2
);
3514 open_dump_file (DFI_peephole2
, decl
);
3516 peephole2_optimize (rtl_dump_file
);
3518 close_dump_file (DFI_peephole2
, print_rtl_with_bb
, insns
);
3519 timevar_pop (TV_PEEPHOLE2
);
3523 if (optimize
> 0 && flag_rename_registers
)
3525 timevar_push (TV_RENAME_REGISTERS
);
3526 open_dump_file (DFI_rnreg
, decl
);
3528 regrename_optimize ();
3530 close_dump_file (DFI_rnreg
, print_rtl_with_bb
, insns
);
3531 timevar_pop (TV_RENAME_REGISTERS
);
3534 #ifdef INSN_SCHEDULING
3535 if (optimize
> 0 && flag_schedule_insns_after_reload
)
3537 timevar_push (TV_SCHED2
);
3538 open_dump_file (DFI_sched2
, decl
);
3540 /* Do control and data sched analysis again,
3541 and write some more of the results to dump file. */
3543 schedule_insns (rtl_dump_file
);
3545 close_dump_file (DFI_sched2
, print_rtl_with_bb
, insns
);
3546 timevar_pop (TV_SCHED2
);
3553 #ifdef LEAF_REGISTERS
3554 current_function_uses_only_leaf_regs
3555 = optimize
> 0 && only_leaf_regs_used () && leaf_function_p ();
3558 if (optimize
> 0 && flag_reorder_blocks
)
3560 timevar_push (TV_REORDER_BLOCKS
);
3561 open_dump_file (DFI_bbro
, decl
);
3563 reorder_basic_blocks ();
3565 close_dump_file (DFI_bbro
, print_rtl_with_bb
, insns
);
3566 timevar_pop (TV_REORDER_BLOCKS
);
3569 /* One more attempt to remove jumps to .+1 left by dead-store elimination.
3570 Also do cross-jumping this time and delete no-op move insns. */
3574 timevar_push (TV_JUMP
);
3575 open_dump_file (DFI_jump2
, decl
);
3577 jump_optimize (insns
, JUMP_CROSS_JUMP
, JUMP_NOOP_MOVES
,
3578 !JUMP_AFTER_REGSCAN
);
3580 /* CFG no longer kept up to date. */
3582 close_dump_file (DFI_jump2
, print_rtl_with_bb
, insns
);
3583 timevar_pop (TV_JUMP
);
3586 /* If a machine dependent reorganization is needed, call it. */
3587 #ifdef MACHINE_DEPENDENT_REORG
3588 open_dump_file (DFI_mach
, decl
);
3590 MACHINE_DEPENDENT_REORG (insns
);
3592 close_dump_file (DFI_mach
, print_rtl_with_bb
, insns
);
3598 /* If a scheduling pass for delayed branches is to be done,
3599 call the scheduling code. */
3602 if (optimize
> 0 && flag_delayed_branch
)
3604 timevar_push (TV_DBR_SCHED
);
3605 open_dump_file (DFI_dbr
, decl
);
3607 dbr_schedule (insns
, rtl_dump_file
);
3609 close_dump_file (DFI_dbr
, print_rtl_with_bb
, insns
);
3610 timevar_pop (TV_DBR_SCHED
);
3617 /* Shorten branches.
3619 Note this must run before reg-stack because of death note (ab)use
3620 in the ia32 backend. */
3621 timevar_push (TV_SHORTEN_BRANCH
);
3622 shorten_branches (get_insns ());
3623 timevar_pop (TV_SHORTEN_BRANCH
);
3626 timevar_push (TV_REG_STACK
);
3627 open_dump_file (DFI_stack
, decl
);
3629 reg_to_stack (insns
, rtl_dump_file
);
3631 close_dump_file (DFI_stack
, print_rtl_with_bb
, insns
);
3632 timevar_pop (TV_REG_STACK
);
3638 current_function_nothrow
= nothrow_function_p ();
3639 if (current_function_nothrow
)
3640 /* Now we know that this can't throw; set the flag for the benefit
3641 of other functions later in this translation unit. */
3642 TREE_NOTHROW (current_function_decl
) = 1;
3644 /* Now turn the rtl into assembler code. */
3646 timevar_push (TV_FINAL
);
3651 /* Get the function's name, as described by its RTL. This may be
3652 different from the DECL_NAME name used in the source file. */
3654 x
= DECL_RTL (decl
);
3655 if (GET_CODE (x
) != MEM
)
3658 if (GET_CODE (x
) != SYMBOL_REF
)
3660 fnname
= XSTR (x
, 0);
3662 assemble_start_function (decl
, fnname
);
3663 final_start_function (insns
, asm_out_file
, optimize
);
3664 final (insns
, asm_out_file
, optimize
, 0);
3665 final_end_function (insns
, asm_out_file
, optimize
);
3666 assemble_end_function (decl
, fnname
);
3668 fflush (asm_out_file
);
3670 /* Release all memory allocated by flow. */
3671 free_basic_block_vars (0);
3673 /* Release all memory held by regsets now. */
3674 regset_release_memory ();
3676 timevar_pop (TV_FINAL
);
3681 /* Write DBX symbols if requested. */
3683 /* Note that for those inline functions where we don't initially
3684 know for certain that we will be generating an out-of-line copy,
3685 the first invocation of this routine (rest_of_compilation) will
3686 skip over this code by doing a `goto exit_rest_of_compilation;'.
3687 Later on, finish_compilation will call rest_of_compilation again
3688 for those inline functions that need to have out-of-line copies
3689 generated. During that call, we *will* be routed past here. */
3691 timevar_push (TV_SYMOUT
);
3692 #ifdef DBX_DEBUGGING_INFO
3693 if (write_symbols
== DBX_DEBUG
)
3694 dbxout_function (decl
);
3697 #ifdef DWARF_DEBUGGING_INFO
3698 if (write_symbols
== DWARF_DEBUG
)
3699 dwarfout_file_scope_decl (decl
, 0);
3702 #ifdef DWARF2_DEBUGGING_INFO
3703 if (write_symbols
== DWARF2_DEBUG
)
3704 dwarf2out_decl (decl
);
3706 timevar_pop (TV_SYMOUT
);
3708 exit_rest_of_compilation
:
3710 /* In case the function was not output,
3711 don't leave any temporary anonymous types
3712 queued up for sdb output. */
3713 #ifdef SDB_DEBUGGING_INFO
3714 if (write_symbols
== SDB_DEBUG
)
3715 sdbout_types (NULL_TREE
);
3718 reload_completed
= 0;
3719 flow2_completed
= 0;
3722 timevar_push (TV_FINAL
);
3724 /* Clear out the insn_length contents now that they are no
3726 init_insn_lengths ();
3728 /* Clear out the real_constant_chain before some of the rtx's
3729 it runs through become garbage. */
3730 clear_const_double_mem ();
3732 /* Cancel the effect of rtl_in_current_obstack. */
3733 resume_temporary_allocation ();
3735 /* Show no temporary slots allocated. */
3738 free_basic_block_vars (0);
3740 timevar_pop (TV_FINAL
);
3742 /* Make sure volatile mem refs aren't considered valid operands for
3743 arithmetic insns. We must call this here if this is a nested inline
3744 function, since the above code leaves us in the init_recog state
3745 (from final.c), and the function context push/pop code does not
3746 save/restore volatile_ok.
3748 ??? Maybe it isn't necessary for expand_start_function to call this
3749 anymore if we do it here? */
3751 init_recog_no_volatile ();
3753 /* We're done with this function. Free up memory if we can. */
3754 free_after_parsing (cfun
);
3755 if (! DECL_DEFER_OUTPUT (decl
))
3756 free_after_compilation (cfun
);
3762 timevar_pop (TV_REST_OF_COMPILATION
);
3773 printf (_("Usage: %s input [switches]\n"), progname
);
3774 printf (_("Switches:\n"));
3776 printf (_(" -ffixed-<register> Mark <register> as being unavailable to the compiler\n"));
3777 printf (_(" -fcall-used-<register> Mark <register> as being corrupted by function calls\n"));
3778 printf (_(" -fcall-saved-<register> Mark <register> as being preserved across functions\n"));
3779 printf (_(" -finline-limit=<number> Limits the size of inlined functions to <number>\n"));
3780 printf (_(" -fmessage-length=<number> Limits diagnostics messages lengths to <number> characters per line. 0 suppresses line-wrapping\n"));
3781 printf (_(" -fdiagnostics-show-location=[once | every-line] Indicates how often source location information should be emitted, as prefix, at the beginning of diagnostics when line-wrapping\n"));
3783 for (i
= ARRAY_SIZE (f_options
); i
--;)
3785 const char *description
= f_options
[i
].description
;
3787 if (description
!= NULL
&& * description
!= 0)
3788 printf (" -f%-21s %s\n",
3789 f_options
[i
].string
, description
);
3792 printf (_(" -O[number] Set optimisation level to [number]\n"));
3793 printf (_(" -Os Optimise for space rather than speed\n"));
3794 printf (_(" -pedantic Issue warnings needed by strict compliance to ISO C\n"));
3795 printf (_(" -pedantic-errors Like -pedantic except that errors are produced\n"));
3796 printf (_(" -w Suppress warnings\n"));
3797 printf (_(" -W Enable extra warnings\n"));
3799 for (i
= ARRAY_SIZE (W_options
); i
--;)
3801 const char *description
= W_options
[i
].description
;
3803 if (description
!= NULL
&& * description
!= 0)
3804 printf (" -W%-21s %s\n",
3805 W_options
[i
].string
, description
);
3808 printf (_(" -Wunused Enable unused warnings\n"));
3809 printf (_(" -Wid-clash-<num> Warn if 2 identifiers have the same first <num> chars\n"));
3810 printf (_(" -Wlarger-than-<number> Warn if an object is larger than <number> bytes\n"));
3811 printf (_(" -p Enable function profiling\n"));
3812 #if defined (BLOCK_PROFILER) || defined (FUNCTION_BLOCK_PROFILER)
3813 printf (_(" -a Enable block profiling \n"));
3815 #if defined (BLOCK_PROFILER) || defined (FUNCTION_BLOCK_PROFILER) || defined FUNCTION_BLOCK_PROFILER_EXIT
3816 printf (_(" -ax Enable jump profiling \n"));
3818 printf (_(" -o <file> Place output into <file> \n"));
3820 -G <number> Put global and static data smaller than <number>\n\
3821 bytes into a special section (on some targets)\n"));
3823 for (i
= ARRAY_SIZE (debug_args
); i
--;)
3825 if (debug_args
[i
].description
!= NULL
)
3826 printf (" -g%-21s %s\n",
3827 debug_args
[i
].arg
, debug_args
[i
].description
);
3830 printf (_(" -aux-info <file> Emit declaration info into <file>.X\n"));
3831 printf (_(" -quiet Do not display functions compiled or elapsed time\n"));
3832 printf (_(" -version Display the compiler's version\n"));
3833 printf (_(" -d[letters] Enable dumps from specific passes of the compiler\n"));
3834 printf (_(" -dumpbase <file> Base name to be used for dumps from specific passes\n"));
3835 #if defined INSN_SCHEDULING
3836 printf (_(" -fsched-verbose=<number> Set the verbosity level of the scheduler\n"));
3838 printf (_(" --help Display this information\n"));
3843 /* Display descriptions of language specific options.
3844 If there is no description, note that there is an undocumented option.
3845 If the description is empty, do not display anything. (This allows
3846 options to be deliberately undocumented, for whatever reason).
3847 If the option string is missing, then this is a marker, indicating
3848 that the description string is in fact the name of a language, whose
3849 language specific options are to follow. */
3851 if (ARRAY_SIZE (documented_lang_options
) > 1)
3853 printf (_("\nLanguage specific options:\n"));
3855 for (i
= 0; i
< ARRAY_SIZE (documented_lang_options
); i
++)
3857 const char *description
= documented_lang_options
[i
].description
;
3858 const char *option
= documented_lang_options
[i
].option
;
3860 if (description
== NULL
)
3865 printf (_(" %-23.23s [undocumented]\n"), option
);
3867 else if (*description
== 0)
3869 else if (option
== NULL
)
3873 (_("\nThere are undocumented %s specific options as well.\n"),
3877 printf (_("\n Options for %s:\n"), description
);
3882 printf (" %-23.23s %s\n", option
, description
);
3887 printf (_("\nThere are undocumented %s specific options as well.\n"),
3890 if (ARRAY_SIZE (target_switches
) > 1
3891 #ifdef TARGET_OPTIONS
3892 || ARRAY_SIZE (target_options
) > 1
3900 printf (_("\nTarget specific options:\n"));
3902 for (i
= ARRAY_SIZE (target_switches
); i
--;)
3904 const char *option
= target_switches
[i
].name
;
3905 const char *description
= target_switches
[i
].description
;
3907 if (option
== NULL
|| *option
== 0)
3909 else if (description
== NULL
)
3914 printf (_(" -m%-21.21s [undocumented]\n"), option
);
3916 else if (* description
!= 0)
3917 doc
+= printf (" -m%-21.21s %s\n", option
, description
);
3920 #ifdef TARGET_OPTIONS
3921 for (i
= ARRAY_SIZE (target_options
); i
--;)
3923 const char *option
= target_options
[i
].prefix
;
3924 const char *description
= target_options
[i
].description
;
3926 if (option
== NULL
|| *option
== 0)
3928 else if (description
== NULL
)
3933 printf (_(" -m%-21.21s [undocumented]\n"), option
);
3935 else if (* description
!= 0)
3936 doc
+= printf (" -m%-21.21s %s\n", option
, description
);
3942 printf (_("\nThere are undocumented target specific options as well.\n"));
3944 printf (_(" They exist, but they are not documented.\n"));
3949 /* Parse a -d... comand line switch. */
3952 decode_d_option (arg
)
3961 for (i
= 0; i
< DFI_MAX
; ++i
)
3962 dump_file
[i
].enabled
= 1;
3971 flag_print_asm_name
= 1;
3974 graph_dump_format
= vcg
;
3977 rtl_dump_and_exit
= 1;
3982 case 'D': /* These are handled by the preprocessor. */
3988 for (i
= 0; i
< DFI_MAX
; ++i
)
3989 if (c
== dump_file
[i
].debug_switch
)
3991 dump_file
[i
].enabled
= 1;
3996 warning ("unrecognized gcc debugging option: %c", c
);
4001 /* Parse a -f... comand line switch. ARG is the value after the -f.
4002 It is safe to access 'ARG - 2' to generate the full switch name.
4003 Return the number of strings consumed. */
4006 decode_f_option (arg
)
4010 const char *option_value
= NULL
;
4012 /* Search for the option in the table of binary f options. */
4013 for (j
= ARRAY_SIZE (f_options
); j
--;)
4015 if (!strcmp (arg
, f_options
[j
].string
))
4017 *f_options
[j
].variable
= f_options
[j
].on_value
;
4021 if (arg
[0] == 'n' && arg
[1] == 'o' && arg
[2] == '-'
4022 && ! strcmp (arg
+ 3, f_options
[j
].string
))
4024 *f_options
[j
].variable
= ! f_options
[j
].on_value
;
4029 if ((option_value
= skip_leading_substring (arg
, "inline-limit-"))
4030 || (option_value
= skip_leading_substring (arg
, "inline-limit=")))
4032 read_integral_parameter (option_value
, arg
- 2, inline_max_insns
);
4033 #ifdef INSN_SCHEDULING
4034 else if ((option_value
= skip_leading_substring (arg
, "sched-verbose=")))
4035 fix_sched_param ("verbose", option_value
);
4037 else if ((option_value
= skip_leading_substring (arg
, "fixed-")))
4038 fix_register (option_value
, 1, 1);
4039 else if ((option_value
= skip_leading_substring (arg
, "call-used-")))
4040 fix_register (option_value
, 0, 1);
4041 else if ((option_value
= skip_leading_substring (arg
, "call-saved-")))
4042 fix_register (option_value
, 0, 0);
4043 else if ((option_value
= skip_leading_substring (arg
, "align-loops=")))
4044 align_loops
= read_integral_parameter (option_value
, arg
- 2, align_loops
);
4045 else if ((option_value
= skip_leading_substring (arg
, "align-functions=")))
4047 = read_integral_parameter (option_value
, arg
- 2, align_functions
);
4048 else if ((option_value
= skip_leading_substring (arg
, "align-jumps=")))
4049 align_jumps
= read_integral_parameter (option_value
, arg
- 2, align_jumps
);
4050 else if ((option_value
= skip_leading_substring (arg
, "align-labels=")))
4052 = read_integral_parameter (option_value
, arg
- 2, align_labels
);
4053 else if ((option_value
4054 = skip_leading_substring (arg
, "stack-limit-register=")))
4056 int reg
= decode_reg_name (option_value
);
4058 error ("unrecognized register name `%s'", option_value
);
4060 stack_limit_rtx
= gen_rtx_REG (Pmode
, reg
);
4062 else if ((option_value
4063 = skip_leading_substring (arg
, "stack-limit-symbol=")))
4067 nm
= ggc_alloc_string (option_value
, strlen (option_value
));
4069 nm
= xstrdup (option_value
);
4070 stack_limit_rtx
= gen_rtx_SYMBOL_REF (Pmode
, nm
);
4072 else if ((option_value
4073 = skip_leading_substring (arg
, "message-length=")))
4074 diagnostic_message_length_per_line
=
4075 read_integral_parameter (option_value
, arg
- 2,
4076 diagnostic_message_length_per_line
);
4077 else if ((option_value
4078 = skip_leading_substring (arg
, "diagnostics-show-location=")))
4080 if (!strcmp (option_value
, "once"))
4081 set_message_prefixing_rule (DIAGNOSTICS_SHOW_PREFIX_ONCE
);
4082 else if (!strcmp (option_value
, "every-line"))
4083 set_message_prefixing_rule (DIAGNOSTICS_SHOW_PREFIX_EVERY_LINE
);
4085 error ("Unrecognized option `%s'", arg
- 2);
4087 else if (!strcmp (arg
, "no-stack-limit"))
4088 stack_limit_rtx
= NULL_RTX
;
4089 else if (!strcmp (arg
, "preprocessed"))
4090 /* Recognise this switch but do nothing. This prevents warnings
4091 about an unrecognized switch if cpplib has not been linked in. */
4099 /* Parse a -W... comand line switch. ARG is the value after the -W.
4100 It is safe to access 'ARG - 2' to generate the full switch name.
4101 Return the number of strings consumed. */
4104 decode_W_option (arg
)
4107 const char *option_value
= NULL
;
4110 /* Search for the option in the table of binary W options. */
4112 for (j
= ARRAY_SIZE (W_options
); j
--;)
4114 if (!strcmp (arg
, W_options
[j
].string
))
4116 *W_options
[j
].variable
= W_options
[j
].on_value
;
4120 if (arg
[0] == 'n' && arg
[1] == 'o' && arg
[2] == '-'
4121 && ! strcmp (arg
+ 3, W_options
[j
].string
))
4123 *W_options
[j
].variable
= ! W_options
[j
].on_value
;
4128 if ((option_value
= skip_leading_substring (arg
, "id-clash-")))
4130 id_clash_len
= read_integral_parameter (option_value
, arg
- 2, -1);
4132 if (id_clash_len
!= -1)
4135 else if ((option_value
= skip_leading_substring (arg
, "larger-than-")))
4137 larger_than_size
= read_integral_parameter (option_value
, arg
- 2, -1);
4139 if (larger_than_size
!= -1)
4140 warn_larger_than
= 1;
4142 else if (!strcmp (arg
, "unused"))
4146 else if (!strcmp (arg
, "no-unused"))
4156 /* Parse a -g... comand line switch. ARG is the value after the -g.
4157 It is safe to access 'ARG - 2' to generate the full switch name.
4158 Return the number of strings consumed. */
4161 decode_g_option (arg
)
4165 /* A lot of code assumes write_symbols == NO_DEBUG if the
4166 debugging level is 0 (thus -gstabs1 -gstabs0 would lose track
4167 of what debugging type has been selected). This records the
4168 selected type. It is an error to specify more than one
4170 static enum debug_info_type selected_debug_type
= NO_DEBUG
;
4171 /* Non-zero if debugging format has been explicitly set.
4172 -g and -ggdb don't explicitly set the debugging format so
4173 -gdwarf -g3 is equivalent to -gdwarf3. */
4174 static int type_explicitly_set_p
= 0;
4175 /* Indexed by enum debug_info_type. */
4176 static const char *debug_type_names
[] =
4178 "none", "stabs", "coff", "dwarf-1", "dwarf-2", "xcoff"
4181 /* The maximum admissible debug level value. */
4182 static const unsigned max_debug_level
= 3;
4184 /* Look up ARG in the table. */
4185 for (da
= debug_args
; da
->arg
; da
++)
4187 const int da_len
= strlen (da
->arg
);
4189 if (da_len
== 0 || ! strncmp (arg
, da
->arg
, da_len
))
4191 enum debug_info_type type
= da
->debug_type
;
4192 const char *p
= arg
+ da_len
;
4194 if (*p
&& (*p
< '0' || *p
> '9'))
4197 /* A debug flag without a level defaults to level 2.
4198 Note we do not want to call read_integral_parameter
4199 for that case since it will call atoi which
4202 ??? We may want to generalize the interface to
4203 read_integral_parameter to better handle this case
4204 if this case shows up often. */
4206 level
= read_integral_parameter (p
, 0, max_debug_level
+ 1);
4210 if (da_len
> 1 && *p
&& !strncmp (arg
, "dwarf", da_len
))
4212 error ("use -gdwarf -g%d for DWARF v1, level %d",
4215 error ("use -gdwarf-2 for DWARF v2");
4218 if (level
> max_debug_level
)
4221 ignoring option `%s' due to invalid debug level specification",
4223 level
= debug_info_level
;
4226 if (type
== NO_DEBUG
)
4228 type
= PREFERRED_DEBUGGING_TYPE
;
4230 if (da_len
> 1 && strncmp (arg
, "gdb", da_len
) == 0)
4232 #if defined (DWARF2_DEBUGGING_INFO) && !defined (LINKER_DOES_NOT_WORK_WITH_DWARF2)
4233 type
= DWARF2_DEBUG
;
4235 #ifdef DBX_DEBUGGING_INFO
4242 if (type
== NO_DEBUG
)
4243 warning ("`%s': unknown or unsupported -g option", arg
- 2);
4245 /* Does it conflict with an already selected type? */
4246 if (type_explicitly_set_p
4247 /* -g/-ggdb don't conflict with anything. */
4248 && da
->debug_type
!= NO_DEBUG
4249 && type
!= selected_debug_type
)
4250 warning ("`%s' ignored, conflicts with `-g%s'",
4251 arg
- 2, debug_type_names
[(int) selected_debug_type
]);
4254 /* If the format has already been set, -g/-ggdb
4255 only change the debug level. */
4256 if (type_explicitly_set_p
&& da
->debug_type
== NO_DEBUG
)
4257 /* Don't change debugging type. */
4261 selected_debug_type
= type
;
4262 type_explicitly_set_p
= da
->debug_type
!= NO_DEBUG
;
4265 write_symbols
= (level
== 0
4267 : selected_debug_type
);
4268 use_gnu_debug_info_extensions
= da
->use_extensions_p
;
4269 debug_info_level
= (enum debug_info_level
) level
;
4282 /* Decode the first argument in the argv as a language-independent option.
4283 Return the number of strings consumed. */
4286 independent_decode_option (argc
, argv
)
4290 char *arg
= argv
[0];
4292 if (arg
[0] != '-' || arg
[1] == 0)
4304 if (!strcmp (arg
, "-help"))
4319 /* Already been treated in main (). Do nothing. */
4323 set_target_switch (arg
+ 1);
4327 return decode_f_option (arg
+ 1);
4330 return decode_g_option (arg
+ 1);
4333 if (!strcmp (arg
, "dumpbase"))
4338 dump_base_name
= argv
[1];
4342 decode_d_option (arg
+ 1);
4346 if (!strcmp (arg
, "pedantic"))
4348 else if (!strcmp (arg
, "pedantic-errors"))
4349 flag_pedantic_errors
= pedantic
= 1;
4350 else if (arg
[1] == 0)
4357 if (!strcmp (arg
, "quiet"))
4364 if (!strcmp (arg
, "version"))
4372 inhibit_warnings
= 1;
4381 /* We save the value of warn_uninitialized, since if they put
4382 -Wuninitialized on the command line, we need to generate a
4383 warning about not using it without also specifying -O. */
4384 if (warn_uninitialized
!= 1)
4385 warn_uninitialized
= 2;
4388 return decode_W_option (arg
+ 1);
4394 #if !defined (BLOCK_PROFILER) || !defined (FUNCTION_BLOCK_PROFILER)
4395 warning ("`-a' option (basic block profile) not supported");
4397 profile_block_flag
= (profile_block_flag
< 2) ? 1 : 3;
4400 else if (!strcmp (arg
, "ax"))
4402 #if !defined (FUNCTION_BLOCK_PROFILER_EXIT) || !defined (BLOCK_PROFILER) || !defined (FUNCTION_BLOCK_PROFILER)
4403 warning ("`-ax' option (jump profiling) not supported");
4405 profile_block_flag
= (!profile_block_flag
4406 || profile_block_flag
== 2) ? 2 : 3;
4409 else if (!strncmp (arg
, "aux-info", 8))
4411 flag_gen_aux_info
= 1;
4417 aux_info_file_name
= argv
[1];
4421 aux_info_file_name
= arg
+ 8;
4433 asm_file_name
= argv
[1];
4448 g_switch_val
= read_integral_parameter (argv
[1], 0, -1);
4453 g_switch_val
= read_integral_parameter (arg
+ 1, 0, -1);
4457 if (g_switch_val
== -1)
4461 g_switch_set
= TRUE
;
4462 g_switch_value
= g_switch_val
;
4472 /* Entry point of cc1/c++. Decode command args, then call compile_file.
4473 Exit code is 35 if can't open files, 34 if fatal error,
4474 33 if had nonfatal errors, else success. */
4476 extern int main
PARAMS ((int, char **));
4486 /* save in case md file wants to emit args as a comment. */
4490 p
= argv
[0] + strlen (argv
[0]);
4491 while (p
!= argv
[0] && !IS_DIR_SEPARATOR (p
[-1]))
4495 #ifdef HAVE_LC_MESSAGES
4496 setlocale (LC_MESSAGES
, "");
4498 (void) bindtextdomain (PACKAGE
, localedir
);
4499 (void) textdomain (PACKAGE
);
4501 /* Install handler for SIGFPE, which may be received while we do
4502 compile-time floating point arithmetic. */
4503 signal (SIGFPE
, float_signal
);
4505 /* Trap fatal signals, e.g. SIGSEGV, and convert them to ICE messages. */
4507 signal (SIGSEGV
, crash_signal
);
4510 signal (SIGILL
, crash_signal
);
4513 signal (SIGBUS
, crash_signal
);
4516 signal (SIGABRT
, crash_signal
);
4518 #if defined SIGIOT && (!defined SIGABRT || SIGABRT != SIGIOT)
4519 signal (SIGIOT
, crash_signal
);
4522 decl_printable_name
= decl_name
;
4523 lang_expand_expr
= (lang_expand_expr_t
) do_abort
;
4525 /* Initialize whether `char' is signed. */
4526 flag_signed_char
= DEFAULT_SIGNED_CHAR
;
4527 #ifdef DEFAULT_SHORT_ENUMS
4528 /* Initialize how much space enums occupy, by default. */
4529 flag_short_enums
= DEFAULT_SHORT_ENUMS
;
4532 /* Initialize the garbage-collector. */
4534 ggc_add_root (&input_file_stack
, 1, sizeof input_file_stack
,
4536 ggc_add_rtx_root (&stack_limit_rtx
, 1);
4537 ggc_add_tree_root (¤t_function_decl
, 1);
4538 ggc_add_tree_root (¤t_function_func_begin_label
, 1);
4540 /* Initialize the diagnostics reporting machinery. */
4541 initialize_diagnostics ();
4543 /* Perform language-specific options intialization. */
4544 lang_init_options ();
4546 /* Scan to see what optimization level has been specified. That will
4547 determine the default value of many flags. */
4548 for (i
= 1; i
< argc
; i
++)
4550 if (!strcmp (argv
[i
], "-O"))
4555 else if (argv
[i
][0] == '-' && argv
[i
][1] == 'O')
4557 /* Handle -Os, -O2, -O3, -O69, ... */
4558 char *p
= &argv
[i
][2];
4560 if ((p
[0] == 's') && (p
[1] == 0))
4564 /* Optimizing for size forces optimize to be 2. */
4569 const int optimize_val
= read_integral_parameter (p
, p
- 2, -1);
4570 if (optimize_val
!= -1)
4572 optimize
= optimize_val
;
4582 flag_thread_jumps
= 1;
4584 flag_delayed_branch
= 1;
4586 #ifdef CAN_DEBUG_WITHOUT_FP
4587 flag_omit_frame_pointer
= 1;
4593 flag_optimize_sibling_calls
= 1;
4594 flag_cse_follow_jumps
= 1;
4595 flag_cse_skip_blocks
= 1;
4597 flag_expensive_optimizations
= 1;
4598 flag_strength_reduce
= 1;
4599 flag_rerun_cse_after_loop
= 1;
4600 flag_rerun_loop_opt
= 1;
4601 flag_caller_saves
= 1;
4604 #ifdef INSN_SCHEDULING
4605 flag_schedule_insns
= 1;
4606 flag_schedule_insns_after_reload
= 1;
4609 flag_strict_aliasing
= 1;
4610 flag_delete_null_pointer_checks
= 1;
4611 flag_reorder_blocks
= 1;
4616 flag_inline_functions
= 1;
4619 if (optimize
< 2 || optimize_size
)
4624 align_functions
= 1;
4627 /* Initialize target_flags before OPTIMIZATION_OPTIONS so the latter can
4630 set_target_switch ("");
4632 /* Unwind tables are always present in an ABI-conformant IA-64
4633 object file, so the default should be ON. */
4634 #ifdef IA64_UNWIND_INFO
4635 flag_unwind_tables
= IA64_UNWIND_INFO
;
4638 #ifdef OPTIMIZATION_OPTIONS
4639 /* Allow default optimizations to be specified on a per-machine basis. */
4640 OPTIMIZATION_OPTIONS (optimize
, optimize_size
);
4643 /* Initialize register usage now so switches may override. */
4646 /* Perform normal command line switch decoding. */
4647 for (i
= 1; i
< argc
;)
4649 unsigned int lang_processed
;
4650 unsigned int indep_processed
;
4652 /* Give the language a chance to decode the option for itself. */
4653 lang_processed
= lang_decode_option (argc
- i
, argv
+ i
);
4655 /* Now see if the option also has a language independent meaning.
4656 Some options are both language specific and language independent,
4658 indep_processed
= independent_decode_option (argc
- i
, argv
+ i
);
4660 if (lang_processed
|| indep_processed
)
4661 i
+= MAX (lang_processed
, indep_processed
);
4664 const char *option
= NULL
;
4665 const char *lang
= NULL
;
4668 /* It is possible that the command line switch is not valid for the
4669 current language, but it is valid for another language. In order
4670 to be compatible with previous versions of the compiler (which
4671 did not issue an error message in this case) we check for this
4672 possibility here. If we do find a match, then if extra_warnings
4673 is set we generate a warning message, otherwise we will just
4674 ignore the option. */
4675 for (j
= 0; j
< ARRAY_SIZE (documented_lang_options
); j
++)
4677 option
= documented_lang_options
[j
].option
;
4680 lang
= documented_lang_options
[j
].description
;
4681 else if (! strncmp (argv
[i
], option
, strlen (option
)))
4685 if (j
!= ARRAY_SIZE (documented_lang_options
))
4689 warning ("Ignoring command line option '%s'", argv
[i
]);
4692 ("(It is valid for %s but not the selected language)",
4696 else if (argv
[i
][0] == '-' && argv
[i
][1] == 'g')
4697 warning ("`%s': unknown or unsupported -g option", &argv
[i
][2]);
4699 error ("Unrecognized option `%s'", argv
[i
]);
4705 /* Reflect any language-specific diagnostic option setting. */
4706 reshape_diagnostic_buffer ();
4708 /* Checker uses the frame pointer. */
4709 if (flag_check_memory_usage
)
4710 flag_omit_frame_pointer
= 0;
4714 /* Inlining does not work if not optimizing,
4715 so force it not to be done. */
4719 /* The c_decode_option and lang_decode_option functions set
4720 this to `2' if -Wall is used, so we can avoid giving out
4721 lots of errors for people who don't realize what -Wall does. */
4722 if (warn_uninitialized
== 1)
4723 warning ("-Wuninitialized is not supported without -O");
4726 #ifdef OVERRIDE_OPTIONS
4727 /* Some machines may reject certain combinations of options. */
4731 if (exceptions_via_longjmp
== 2)
4733 #ifdef DWARF2_UNWIND_INFO
4734 exceptions_via_longjmp
= ! DWARF2_UNWIND_INFO
;
4736 #ifdef IA64_UNWIND_INFO
4737 exceptions_via_longjmp
= ! IA64_UNWIND_INFO
;
4739 exceptions_via_longjmp
= 1;
4744 /* Since each function gets its own handler data, we can't support the
4745 new model currently, since it depend on a specific rethrow label
4746 which is declared at the front of the table, and we can only
4747 have one such symbol in a file. */
4748 #ifdef IA64_UNWIND_INFO
4749 flag_new_exceptions
= 0;
4752 /* Set up the align_*_log variables, defaulting them to 1 if they
4753 were still unset. */
4754 if (align_loops
<= 0) align_loops
= 1;
4755 align_loops_log
= floor_log2 (align_loops
* 2 - 1);
4756 if (align_jumps
<= 0) align_jumps
= 1;
4757 align_jumps_log
= floor_log2 (align_jumps
* 2 - 1);
4758 if (align_labels
<= 0) align_labels
= 1;
4759 align_labels_log
= floor_log2 (align_labels
* 2 - 1);
4760 if (align_functions
<= 0) align_functions
= 1;
4761 align_functions_log
= floor_log2 (align_functions
* 2 - 1);
4763 if (profile_block_flag
== 3)
4765 warning ("`-ax' and `-a' are conflicting options. `-a' ignored.");
4766 profile_block_flag
= 2;
4769 /* Unrolling all loops implies that standard loop unrolling must also
4771 if (flag_unroll_all_loops
)
4772 flag_unroll_loops
= 1;
4773 /* Loop unrolling requires that strength_reduction be on also. Silently
4774 turn on strength reduction here if it isn't already on. Also, the loop
4775 unrolling code assumes that cse will be run after loop, so that must
4776 be turned on also. */
4777 if (flag_unroll_loops
)
4779 flag_strength_reduce
= 1;
4780 flag_rerun_cse_after_loop
= 1;
4783 /* Warn about options that are not supported on this machine. */
4784 #ifndef INSN_SCHEDULING
4785 if (flag_schedule_insns
|| flag_schedule_insns_after_reload
)
4786 warning ("instruction scheduling not supported on this target machine");
4789 if (flag_delayed_branch
)
4790 warning ("this target machine does not have delayed branches");
4793 user_label_prefix
= USER_LABEL_PREFIX
;
4794 if (flag_leading_underscore
!= -1)
4796 /* If the default prefix is more complicated than "" or "_",
4797 issue a warning and ignore this option. */
4798 if (user_label_prefix
[0] == 0 ||
4799 (user_label_prefix
[0] == '_' && user_label_prefix
[1] == 0))
4801 user_label_prefix
= flag_leading_underscore
? "_" : "";
4804 warning ("-f%sleading-underscore not supported on this target machine",
4805 flag_leading_underscore
? "" : "no-");
4808 /* If we are in verbose mode, write out the version and maybe all the
4809 option flags in use. */
4812 print_version (stderr
, "");
4814 print_switch_values (stderr
, 0, MAX_LINE
, "", " ", "\n");
4817 compile_file (filename
);
4819 #if !defined(OS2) && !defined(VMS) && (!defined(_WIN32) || defined (__CYGWIN__)) && !defined(__INTERIX)
4822 char *lim
= (char *) sbrk (0);
4824 fnotice (stderr
, "Data size %ld.\n", (long) (lim
- (char *) &environ
));
4829 system ("ps -l 1>&2");
4832 #endif /* not USG */
4835 #endif /* ! OS2 && ! VMS && (! _WIN32 || CYGWIN) && ! __INTERIX */
4838 return (FATAL_EXIT_CODE
);
4840 return (FATAL_EXIT_CODE
);
4841 return (SUCCESS_EXIT_CODE
);
4844 /* Decode -m switches. */
4845 /* Decode the switch -mNAME. */
4848 set_target_switch (name
)
4852 int valid_target_option
= 0;
4854 for (j
= 0; j
< ARRAY_SIZE (target_switches
); j
++)
4855 if (!strcmp (target_switches
[j
].name
, name
))
4857 if (target_switches
[j
].value
< 0)
4858 target_flags
&= ~-target_switches
[j
].value
;
4860 target_flags
|= target_switches
[j
].value
;
4861 valid_target_option
= 1;
4864 #ifdef TARGET_OPTIONS
4865 if (!valid_target_option
)
4866 for (j
= 0; j
< ARRAY_SIZE (target_options
); j
++)
4868 int len
= strlen (target_options
[j
].prefix
);
4869 if (!strncmp (target_options
[j
].prefix
, name
, len
))
4871 *target_options
[j
].variable
= name
+ len
;
4872 valid_target_option
= 1;
4877 if (!valid_target_option
)
4878 error ("Invalid option `%s'", name
);
4881 /* Print version information to FILE.
4882 Each line begins with INDENT (for the case where FILE is the
4883 assembler output file). */
4886 print_version (file
, indent
)
4891 #define __VERSION__ "[?]"
4895 "%s%s%s version %s (%s) compiled by GNU C version %s.\n"
4897 "%s%s%s version %s (%s) compiled by CC.\n"
4899 , indent
, *indent
!= 0 ? " " : "",
4900 language_string
, version_string
, TARGET_NAME
, __VERSION__
);
4903 /* Print an option value and return the adjusted position in the line.
4904 ??? We don't handle error returns from fprintf (disk full); presumably
4905 other code will catch a disk full though. */
4908 print_single_switch (file
, pos
, max
, indent
, sep
, term
, type
, name
)
4911 const char *indent
, *sep
, *term
, *type
, *name
;
4913 /* The ultrix fprintf returns 0 on success, so compute the result we want
4914 here since we need it for the following test. */
4915 int len
= strlen (sep
) + strlen (type
) + strlen (name
);
4920 fprintf (file
, "%s", term
);
4925 fprintf (file
, "%s", indent
);
4926 pos
= strlen (indent
);
4928 fprintf (file
, "%s%s%s", sep
, type
, name
);
4933 /* Print active target switches to FILE.
4934 POS is the current cursor position and MAX is the size of a "line".
4935 Each line begins with INDENT and ends with TERM.
4936 Each switch is separated from the next by SEP. */
4939 print_switch_values (file
, pos
, max
, indent
, sep
, term
)
4942 const char *indent
, *sep
, *term
;
4947 /* Print the options as passed. */
4949 pos
= print_single_switch (file
, pos
, max
, indent
, *indent
? " " : "", term
,
4950 _("options passed: "), "");
4952 for (p
= &save_argv
[1]; *p
!= NULL
; p
++)
4956 if (strcmp (*p
, "-o") == 0)
4962 if (strcmp (*p
, "-quiet") == 0)
4964 if (strcmp (*p
, "-version") == 0)
4969 pos
= print_single_switch (file
, pos
, max
, indent
, sep
, term
, *p
, "");
4972 fprintf (file
, "%s", term
);
4974 /* Print the -f and -m options that have been enabled.
4975 We don't handle language specific options but printing argv
4978 pos
= print_single_switch (file
, 0, max
, indent
, *indent
? " " : "", term
,
4979 _("options enabled: "), "");
4981 for (j
= 0; j
< ARRAY_SIZE (f_options
); j
++)
4982 if (*f_options
[j
].variable
== f_options
[j
].on_value
)
4983 pos
= print_single_switch (file
, pos
, max
, indent
, sep
, term
,
4984 "-f", f_options
[j
].string
);
4986 /* Print target specific options. */
4988 for (j
= 0; j
< ARRAY_SIZE (target_switches
); j
++)
4989 if (target_switches
[j
].name
[0] != '\0'
4990 && target_switches
[j
].value
> 0
4991 && ((target_switches
[j
].value
& target_flags
)
4992 == target_switches
[j
].value
))
4994 pos
= print_single_switch (file
, pos
, max
, indent
, sep
, term
,
4995 "-m", target_switches
[j
].name
);
4998 #ifdef TARGET_OPTIONS
4999 for (j
= 0; j
< ARRAY_SIZE (target_options
); j
++)
5000 if (*target_options
[j
].variable
!= NULL
)
5003 sprintf (prefix
, "-m%s", target_options
[j
].prefix
);
5004 pos
= print_single_switch (file
, pos
, max
, indent
, sep
, term
,
5005 prefix
, *target_options
[j
].variable
);
5009 fprintf (file
, "%s", term
);
5012 /* Record the beginning of a new source file, named FILENAME. */
5015 debug_start_source_file (filename
)
5016 register const char *filename ATTRIBUTE_UNUSED
;
5018 #ifdef DBX_DEBUGGING_INFO
5019 if (write_symbols
== DBX_DEBUG
)
5020 dbxout_start_new_source_file (filename
);
5022 #ifdef DWARF_DEBUGGING_INFO
5023 if (debug_info_level
== DINFO_LEVEL_VERBOSE
5024 && write_symbols
== DWARF_DEBUG
)
5025 dwarfout_start_new_source_file (filename
);
5026 #endif /* DWARF_DEBUGGING_INFO */
5027 #ifdef DWARF2_DEBUGGING_INFO
5028 if (write_symbols
== DWARF2_DEBUG
)
5029 dwarf2out_start_source_file (filename
);
5030 #endif /* DWARF2_DEBUGGING_INFO */
5031 #ifdef SDB_DEBUGGING_INFO
5032 if (write_symbols
== SDB_DEBUG
)
5033 sdbout_start_new_source_file (filename
);
5037 /* Record the resumption of a source file. LINENO is the line number in
5038 the source file we are returning to. */
5041 debug_end_source_file (lineno
)
5042 register unsigned lineno ATTRIBUTE_UNUSED
;
5044 #ifdef DBX_DEBUGGING_INFO
5045 if (write_symbols
== DBX_DEBUG
)
5046 dbxout_resume_previous_source_file ();
5048 #ifdef DWARF_DEBUGGING_INFO
5049 if (debug_info_level
== DINFO_LEVEL_VERBOSE
5050 && write_symbols
== DWARF_DEBUG
)
5051 dwarfout_resume_previous_source_file (lineno
);
5052 #endif /* DWARF_DEBUGGING_INFO */
5053 #ifdef DWARF2_DEBUGGING_INFO
5054 if (write_symbols
== DWARF2_DEBUG
)
5055 dwarf2out_end_source_file ();
5056 #endif /* DWARF2_DEBUGGING_INFO */
5057 #ifdef SDB_DEBUGGING_INFO
5058 if (write_symbols
== SDB_DEBUG
)
5059 sdbout_resume_previous_source_file ();
5063 /* Called from check_newline in c-parse.y. The `buffer' parameter contains
5064 the tail part of the directive line, i.e. the part which is past the
5065 initial whitespace, #, whitespace, directive-name, whitespace part. */
5068 debug_define (lineno
, buffer
)
5069 register unsigned lineno ATTRIBUTE_UNUSED
;
5070 register char *buffer ATTRIBUTE_UNUSED
;
5072 #ifdef DWARF_DEBUGGING_INFO
5073 if (debug_info_level
== DINFO_LEVEL_VERBOSE
5074 && write_symbols
== DWARF_DEBUG
)
5075 dwarfout_define (lineno
, buffer
);
5076 #endif /* DWARF_DEBUGGING_INFO */
5077 #ifdef DWARF2_DEBUGGING_INFO
5078 if (debug_info_level
== DINFO_LEVEL_VERBOSE
5079 && write_symbols
== DWARF2_DEBUG
)
5080 dwarf2out_define (lineno
, buffer
);
5081 #endif /* DWARF2_DEBUGGING_INFO */
5084 /* Called from check_newline in c-parse.y. The `buffer' parameter contains
5085 the tail part of the directive line, i.e. the part which is past the
5086 initial whitespace, #, whitespace, directive-name, whitespace part. */
5089 debug_undef (lineno
, buffer
)
5090 register unsigned lineno ATTRIBUTE_UNUSED
;
5091 register char *buffer ATTRIBUTE_UNUSED
;
5093 #ifdef DWARF_DEBUGGING_INFO
5094 if (debug_info_level
== DINFO_LEVEL_VERBOSE
5095 && write_symbols
== DWARF_DEBUG
)
5096 dwarfout_undef (lineno
, buffer
);
5097 #endif /* DWARF_DEBUGGING_INFO */
5098 #ifdef DWARF2_DEBUGGING_INFO
5099 if (debug_info_level
== DINFO_LEVEL_VERBOSE
5100 && write_symbols
== DWARF2_DEBUG
)
5101 dwarf2out_undef (lineno
, buffer
);
5102 #endif /* DWARF2_DEBUGGING_INFO */
5105 /* Returns nonzero if it is appropriate not to emit any debugging
5106 information for BLOCK, because it doesn't contain any instructions.
5107 This may not be the case for blocks containing nested functions, since
5108 we may actually call such a function even though the BLOCK information
5112 debug_ignore_block (block
)
5113 tree block ATTRIBUTE_UNUSED
;
5115 /* Never delete the BLOCK for the outermost scope
5116 of the function; we can refer to names from
5117 that scope even if the block notes are messed up. */
5118 if (is_body_block (block
))
5121 #ifdef DWARF2_DEBUGGING_INFO
5122 if (write_symbols
== DWARF2_DEBUG
)
5123 return dwarf2out_ignore_block (block
);