1 /* Top level of GNU C compiler
2 Copyright (C) 1987, 1988, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
3 1999, 2000, 2001 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-config.h"
49 #include "hard-reg-set.h"
56 #include "basic-block.h"
63 #include "diagnostic.h"
67 #include "dwarf2asm.h"
68 #include "integrate.h"
72 #if defined (DWARF2_UNWIND_INFO) || defined (DWARF2_DEBUGGING_INFO)
73 #include "dwarf2out.h"
76 #if defined(DBX_DEBUGGING_INFO) || defined(XCOFF_DEBUGGING_INFO)
80 #ifdef SDB_DEBUGGING_INFO
84 #ifdef XCOFF_DEBUGGING_INFO
85 #include "xcoffout.h" /* Needed for external data
86 declarations for e.g. AIX 4.x. */
90 /* The extra parameters substantially improve the I/O performance. */
93 vms_fopen (fname
, type
)
97 /* The <stdio.h> in the gcc-vms-1.42 distribution prototypes fopen with two
98 fixed arguments, which matches ANSI's specification but not VAXCRTL's
99 pre-ANSI implementation. This hack circumvents the mismatch problem. */
100 FILE *(*vmslib_fopen
)() = (FILE *(*)()) fopen
;
103 return (*vmslib_fopen
) (fname
, type
, "mbc=32",
104 "deq=64", "fop=tef", "shr=nil");
106 return (*vmslib_fopen
) (fname
, type
, "mbc=32");
109 #define fopen vms_fopen
112 #ifndef DEFAULT_GDB_EXTENSIONS
113 #define DEFAULT_GDB_EXTENSIONS 1
116 /* If more than one debugging type is supported, you must define
117 PREFERRED_DEBUGGING_TYPE to choose a format in a system-dependent way.
119 This is one long line cause VAXC can't handle a \-newline. */
120 #if 1 < (defined (DBX_DEBUGGING_INFO) + defined (SDB_DEBUGGING_INFO) + defined (DWARF_DEBUGGING_INFO) + defined (DWARF2_DEBUGGING_INFO) + defined (XCOFF_DEBUGGING_INFO))
121 #ifndef PREFERRED_DEBUGGING_TYPE
122 You Lose
! You must define PREFERRED_DEBUGGING_TYPE
!
123 #endif /* no PREFERRED_DEBUGGING_TYPE */
124 #else /* Only one debugging format supported. Define PREFERRED_DEBUGGING_TYPE
125 so the following code needn't care. */
126 #ifdef DBX_DEBUGGING_INFO
127 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
129 #ifdef SDB_DEBUGGING_INFO
130 #define PREFERRED_DEBUGGING_TYPE SDB_DEBUG
132 #ifdef DWARF_DEBUGGING_INFO
133 #define PREFERRED_DEBUGGING_TYPE DWARF_DEBUG
135 #ifdef DWARF2_DEBUGGING_INFO
136 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
138 #ifdef XCOFF_DEBUGGING_INFO
139 #define PREFERRED_DEBUGGING_TYPE XCOFF_DEBUG
141 #endif /* More than one debugger format enabled. */
143 /* If still not defined, must have been because no debugging formats
145 #ifndef PREFERRED_DEBUGGING_TYPE
146 #define PREFERRED_DEBUGGING_TYPE NO_DEBUG
149 #if defined (HAVE_DECL_ENVIRON) && !HAVE_DECL_ENVIRON
150 extern char **environ
;
153 /* Carry information from ASM_DECLARE_OBJECT_NAME
154 to ASM_FINISH_DECLARE_OBJECT. */
156 extern int size_directive_output
;
157 extern tree last_assemble_variable_decl
;
159 static void set_target_switch
PARAMS ((const char *));
160 static const char *decl_name
PARAMS ((tree
, int));
162 static void float_signal
PARAMS ((int)) ATTRIBUTE_NORETURN
;
163 static void crash_signal
PARAMS ((int)) ATTRIBUTE_NORETURN
;
164 static void compile_file
PARAMS ((const char *));
165 static void display_help
PARAMS ((void));
166 static void display_target_options
PARAMS ((void));
168 static void decode_d_option
PARAMS ((const char *));
169 static int decode_f_option
PARAMS ((const char *));
170 static int decode_W_option
PARAMS ((const char *));
171 static int decode_g_option
PARAMS ((const char *));
172 static unsigned int independent_decode_option
PARAMS ((int, char **));
174 static void print_version
PARAMS ((FILE *, const char *));
175 static int print_single_switch
PARAMS ((FILE *, int, int, const char *,
176 const char *, const char *,
177 const char *, const char *));
178 static void print_switch_values
PARAMS ((FILE *, int, int, const char *,
179 const char *, const char *));
181 /* Length of line when printing switch values. */
184 /* Name of program invoked, sans directories. */
186 const char *progname
;
188 /* Copy of arguments to toplev_main. */
192 /* Name of current original source file (what was input to cpp).
193 This comes from each #-command in the actual input. */
195 const char *input_filename
;
197 /* Name of top-level original source file (what was input to cpp).
198 This comes from the #-command at the beginning of the actual input.
199 If there isn't any there, then this is the cc1 input file name. */
201 const char *main_input_filename
;
203 /* Current line number in real source file. */
207 /* Nonzero if it is unsafe to create any new pseudo registers. */
210 /* Stack of currently pending input files. */
212 struct file_stack
*input_file_stack
;
214 /* Incremented on each change to input_file_stack. */
215 int input_file_stack_tick
;
217 /* Name to use as base of names for dump output files. */
219 const char *dump_base_name
;
221 /* Bit flags that specify the machine subtype we are compiling for.
222 Bits are tested using macros TARGET_... defined in the tm.h file
223 and set by `-m...' switches. Must be defined in rtlanal.c. */
225 extern int target_flags
;
227 /* Debug hooks - dependent upon command line options. */
229 struct gcc_debug_hooks
*debug_hooks
;
231 /* Describes a dump file. */
233 struct dump_file_info
235 /* The unique extension to apply, e.g. ".jump". */
236 const char *const extension
;
238 /* The -d<c> character that enables this dump file. */
239 char const debug_switch
;
241 /* True if there is a corresponding graph dump file. */
242 char const graph_dump_p
;
244 /* True if the user selected this dump. */
247 /* True if the files have been initialized (ie truncated). */
251 /* Enumerate the extant dump files. */
290 /* Describes all the dump files. Should be kept in order of the
291 pass and in sync with dump_file_index above.
293 Remaining -d letters:
299 struct dump_file_info dump_file
[DFI_MAX
] =
301 { "rtl", 'r', 0, 0, 0 },
302 { "sibling", 'i', 0, 0, 0 },
303 { "eh", 'h', 0, 0, 0 },
304 { "jump", 'j', 0, 0, 0 },
305 { "ssa", 'e', 1, 0, 0 },
306 { "ssaccp", 'W', 1, 0, 0 },
307 { "ssadce", 'X', 1, 0, 0 },
308 { "ussa", 'e', 1, 0, 0 }, /* Yes, duplicate enable switch. */
309 { "cse", 's', 0, 0, 0 },
310 { "addressof", 'F', 0, 0, 0 },
311 { "gcse", 'G', 1, 0, 0 },
312 { "loop", 'L', 1, 0, 0 },
313 { "cse2", 't', 1, 0, 0 },
314 { "cfg", 'f', 1, 0, 0 },
315 { "bp", 'b', 1, 0, 0 },
316 { "life", 'f', 1, 0, 0 }, /* Yes, duplicate enable switch. */
317 { "combine", 'c', 1, 0, 0 },
318 { "ce", 'C', 1, 0, 0 },
319 { "regmove", 'N', 1, 0, 0 },
320 { "sched", 'S', 1, 0, 0 },
321 { "lreg", 'l', 1, 0, 0 },
322 { "greg", 'g', 1, 0, 0 },
323 { "postreload", 'o', 1, 0, 0 },
324 { "flow2", 'w', 1, 0, 0 },
325 { "peephole2", 'z', 1, 0, 0 },
326 { "rnreg", 'n', 1, 0, 0 },
327 { "ce2", 'E', 1, 0, 0 },
328 { "sched2", 'R', 1, 0, 0 },
329 { "stack", 'k', 1, 0, 0 },
330 { "bbro", 'B', 1, 0, 0 },
331 { "mach", 'M', 1, 0, 0 },
332 { "dbr", 'd', 0, 0, 0 },
335 static int open_dump_file
PARAMS ((enum dump_file_index
, tree
));
336 static void close_dump_file
PARAMS ((enum dump_file_index
,
337 void (*) (FILE *, rtx
), rtx
));
339 /* Other flags saying which kinds of debugging dump have been requested. */
341 int rtl_dump_and_exit
;
342 int flag_print_asm_name
;
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 /* Nonzero if we should exit after parsing options. */
387 static int exit_after_options
= 0;
389 /* The FUNCTION_DECL for the function currently being compiled,
390 or 0 if between functions. */
391 tree current_function_decl
;
393 /* Set to the FUNC_BEGIN label of the current function, or NULL_TREE
395 tree current_function_func_begin_label
;
397 /* Pointer to function to compute the name to use to print a declaration.
398 DECL is the declaration in question.
399 VERBOSITY determines what information will be printed:
400 0: DECL_NAME, demangled as necessary.
401 1: and scope information.
402 2: and any other information that might be interesting, such as function
403 parameter types in C++. */
405 const char *(*decl_printable_name
) PARAMS ((tree
, int));
407 /* Pointer to function to compute rtl for a language-specific tree code. */
409 typedef rtx (*lang_expand_expr_t
)
410 PARAMS ((union tree_node
*, rtx
, enum machine_mode
,
411 enum expand_modifier modifier
));
413 lang_expand_expr_t lang_expand_expr
= 0;
415 tree (*lang_expand_constant
) PARAMS ((tree
)) = 0;
417 /* Pointer to function to finish handling an incomplete decl at the
418 end of compilation. */
420 void (*incomplete_decl_finalize_hook
) PARAMS ((tree
)) = 0;
422 /* Nonzero if doing dwarf2 duplicate elimination. */
424 int flag_eliminate_dwarf2_dups
= 0;
426 /* Nonzero if generating code to do profiling. */
428 int profile_flag
= 0;
430 /* Nonzero if generating code to do profiling on a line-by-line basis. */
432 int profile_block_flag
;
434 /* Nonzero if generating code to profile program flow graph arcs. */
436 int profile_arc_flag
= 0;
438 /* Nonzero if generating info for gcov to calculate line test coverage. */
440 int flag_test_coverage
= 0;
442 /* Nonzero indicates that branch taken probabilities should be calculated. */
444 int flag_branch_probabilities
= 0;
446 /* Nonzero if basic blocks should be reordered. */
448 int flag_reorder_blocks
= 0;
450 /* Nonzero if registers should be renamed. */
452 int flag_rename_registers
= 0;
454 /* Nonzero for -pedantic switch: warn about anything
455 that standard spec forbids. */
459 /* Temporarily suppress certain warnings.
460 This is set while reading code from a system header file. */
462 int in_system_header
= 0;
464 /* Don't print functions as they are compiled. -quiet. */
468 /* Print times taken by the various passes. -ftime-report. */
472 /* Print memory still in use at end of compilation (which may have little
473 to do with peak memory consumption). -fmem-report. */
477 /* Non-zero means to collect statistics which might be expensive
478 and to print them when we are done. */
479 int flag_detailed_statistics
= 0;
484 /* Nonzero means `char' should be signed. */
486 int flag_signed_char
;
488 /* Nonzero means give an enum type only as many bytes as it needs. */
490 int flag_short_enums
;
492 /* Nonzero for -fcaller-saves: allocate values in regs that need to
493 be saved across function calls, if that produces overall better code.
494 Optional now, so people can test it. */
496 #ifdef DEFAULT_CALLER_SAVES
497 int flag_caller_saves
= 1;
499 int flag_caller_saves
= 0;
502 /* Nonzero if structures and unions should be returned in memory.
504 This should only be defined if compatibility with another compiler or
505 with an ABI is needed, because it results in slower code. */
507 #ifndef DEFAULT_PCC_STRUCT_RETURN
508 #define DEFAULT_PCC_STRUCT_RETURN 1
511 /* Nonzero for -fpcc-struct-return: return values the same way PCC does. */
513 int flag_pcc_struct_return
= DEFAULT_PCC_STRUCT_RETURN
;
515 /* Nonzero for -fforce-mem: load memory value into a register
516 before arithmetic on it. This makes better cse but slower compilation. */
518 int flag_force_mem
= 0;
520 /* Nonzero for -fforce-addr: load memory address into a register before
521 reference to memory. This makes better cse but slower compilation. */
523 int flag_force_addr
= 0;
525 /* Nonzero for -fdefer-pop: don't pop args after each function call;
526 instead save them up to pop many calls' args with one insns. */
528 int flag_defer_pop
= 0;
530 /* Nonzero for -ffloat-store: don't allocate floats and doubles
531 in extended-precision registers. */
533 int flag_float_store
= 0;
535 /* Nonzero for -fcse-follow-jumps:
536 have cse follow jumps to do a more extensive job. */
538 int flag_cse_follow_jumps
;
540 /* Nonzero for -fcse-skip-blocks:
541 have cse follow a branch around a block. */
542 int flag_cse_skip_blocks
;
544 /* Nonzero for -fexpensive-optimizations:
545 perform miscellaneous relatively-expensive optimizations. */
546 int flag_expensive_optimizations
;
548 /* Nonzero for -fthread-jumps:
549 have jump optimize output of loop. */
551 int flag_thread_jumps
;
553 /* Nonzero enables strength-reduction in loop.c. */
555 int flag_strength_reduce
= 0;
557 /* Nonzero enables loop unrolling in unroll.c. Only loops for which the
558 number of iterations can be calculated at compile-time (UNROLL_COMPLETELY,
559 UNROLL_MODULO) or at run-time (preconditioned to be UNROLL_MODULO) are
562 int flag_unroll_loops
;
564 /* Nonzero enables loop unrolling in unroll.c. All loops are unrolled.
565 This is generally not a win. */
567 int flag_unroll_all_loops
;
569 /* Nonzero forces all invariant computations in loops to be moved
572 int flag_move_all_movables
= 0;
574 /* Nonzero forces all general induction variables in loops to be
577 int flag_reduce_all_givs
= 0;
579 /* Nonzero to perform full register move optimization passes. This is the
582 int flag_regmove
= 0;
584 /* Nonzero for -fwritable-strings:
585 store string constants in data segment and don't uniquize them. */
587 int flag_writable_strings
= 0;
589 /* Nonzero means don't put addresses of constant functions in registers.
590 Used for compiling the Unix kernel, where strange substitutions are
591 done on the assembly output. */
593 int flag_no_function_cse
= 0;
595 /* Nonzero for -fomit-frame-pointer:
596 don't make a frame pointer in simple functions that don't require one. */
598 int flag_omit_frame_pointer
= 0;
600 /* Nonzero means place each function into its own section on those platforms
601 which support arbitrary section names and unlimited numbers of sections. */
603 int flag_function_sections
= 0;
605 /* ... and similar for data. */
607 int flag_data_sections
= 0;
609 /* Nonzero to inhibit use of define_optimization peephole opts. */
611 int flag_no_peephole
= 0;
613 /* Nonzero allows GCC to optimize sibling and tail recursive calls. */
615 int flag_optimize_sibling_calls
= 0;
617 /* Nonzero means the front end generally wants `errno' maintained by math
618 operations, like built-in SQRT. */
620 int flag_errno_math
= 1;
622 /* Nonzero means that unsafe floating-point math optimizations are allowed
623 for the sake of speed. IEEE compliance is not guaranteed, and operations
624 are allowed to assume that their arguments and results are "normal"
625 (e.g., nonnegative for SQRT). */
627 int flag_unsafe_math_optimizations
= 0;
629 /* Zero means that floating-point math operations cannot generate a
630 (user-visible) trap. This is the case, for example, in nonstop
631 IEEE 754 arithmetic. */
633 int flag_trapping_math
= 1;
635 /* 0 means straightforward implementation of complex divide acceptable.
636 1 means wide ranges of inputs must work for complex divide.
637 2 means C99-like requirements for complex divide (not yet implemented). */
639 int flag_complex_divide_method
= 0;
641 /* Nonzero means all references through pointers are volatile. */
645 /* Nonzero means treat all global and extern variables as volatile. */
647 int flag_volatile_global
;
649 /* Nonzero means treat all static variables as volatile. */
651 int flag_volatile_static
;
653 /* Nonzero means just do syntax checking; don't output anything. */
655 int flag_syntax_only
= 0;
657 /* Nonzero means perform global cse. */
659 static int flag_gcse
;
661 /* Nonzero means to use global dataflow analysis to eliminate
662 useless null pointer tests. */
664 static int flag_delete_null_pointer_checks
;
666 /* Nonzero means to do the enhanced load motion during gcse, which trys
667 to hoist loads by not killing them when a store to the same location
670 int flag_gcse_lm
= 1;
672 /* Nonzero means to perform store motion after gcse, which will try to
673 move stores closer to the exit block. Its not very effective without
676 int flag_gcse_sm
= 1;
678 /* Nonzero means to rerun cse after loop optimization. This increases
679 compilation time about 20% and picks up a few more common expressions. */
681 static int flag_rerun_cse_after_loop
;
683 /* Nonzero means to run loop optimizations twice. */
685 int flag_rerun_loop_opt
;
687 /* Nonzero for -finline-functions: ok to inline functions that look like
688 good inline candidates. */
690 int flag_inline_functions
;
692 /* Nonzero for -fkeep-inline-functions: even if we make a function
693 go inline everywhere, keep its definition around for debugging
696 int flag_keep_inline_functions
;
698 /* Nonzero means that functions will not be inlined. */
702 /* Nonzero means that we should emit static const variables
703 regardless of whether or not optimization is turned on. */
705 int flag_keep_static_consts
= 1;
707 /* Nonzero means we should be saving declaration info into a .X file. */
709 int flag_gen_aux_info
= 0;
711 /* Specified name of aux-info file. */
713 static char *aux_info_file_name
;
715 /* Nonzero means make the text shared if supported. */
717 int flag_shared_data
;
719 /* Nonzero means schedule into delayed branch slots if supported. */
721 int flag_delayed_branch
;
723 /* Nonzero if we are compiling pure (sharable) code.
724 Value is 1 if we are doing reasonable (i.e. simple
725 offset into offset table) pic. Value is 2 if we can
726 only perform register offsets. */
730 /* Nonzero means generate extra code for exception handling and enable
731 exception handling. */
735 /* Nonzero means generate frame unwind info table when supported. */
737 int flag_unwind_tables
= 0;
739 /* Nonzero means don't place uninitialized global data in common storage
744 /* Nonzero means pretend it is OK to examine bits of target floats,
745 even if that isn't true. The resulting code will have incorrect constants,
746 but the same series of instructions that the native compiler would make. */
748 int flag_pretend_float
;
750 /* Nonzero means change certain warnings into errors.
751 Usually these are warnings about failure to conform to some standard. */
753 int flag_pedantic_errors
= 0;
755 /* flag_schedule_insns means schedule insns within basic blocks (before
757 flag_schedule_insns_after_reload means schedule insns after
760 int flag_schedule_insns
= 0;
761 int flag_schedule_insns_after_reload
= 0;
763 /* The following flags have effect only for scheduling before register
766 flag_schedule_interblock means schedule insns accross basic blocks.
767 flag_schedule_speculative means allow speculative motion of non-load insns.
768 flag_schedule_speculative_load means allow speculative motion of some
770 flag_schedule_speculative_load_dangerous allows speculative motion of more
773 int flag_schedule_interblock
= 1;
774 int flag_schedule_speculative
= 1;
775 int flag_schedule_speculative_load
= 0;
776 int flag_schedule_speculative_load_dangerous
= 0;
778 int flag_single_precision_constant
;
780 /* flag_branch_on_count_reg means try to replace add-1,compare,branch tupple
781 by a cheaper branch on a count register. */
782 int flag_branch_on_count_reg
= 1;
784 /* -finhibit-size-directive inhibits output of .size for ELF.
785 This is used only for compiling crtstuff.c,
786 and it may be extended to other effects
787 needed for crtstuff.c on other systems. */
788 int flag_inhibit_size_directive
= 0;
790 /* -fverbose-asm causes extra commentary information to be produced in
791 the generated assembly code (to make it more readable). This option
792 is generally only of use to those who actually need to read the
793 generated assembly code (perhaps while debugging the compiler itself).
794 -fno-verbose-asm, the default, causes the extra information
795 to be omitted and is useful when comparing two assembler files. */
797 int flag_verbose_asm
= 0;
799 /* -dA causes debug commentary information to be produced in
800 the generated assembly code (to make it more readable). This option
801 is generally only of use to those who actually need to read the
802 generated assembly code (perhaps while debugging the compiler itself).
803 Currently, this switch is only used by dwarfout.c; however, it is intended
804 to be a catchall for printing debug information in the assembler file. */
806 int flag_debug_asm
= 0;
808 /* -dP causes the rtl to be emitted as a comment in assembly. */
810 int flag_dump_rtl_in_asm
= 0;
812 /* -fgnu-linker specifies use of the GNU linker for initializations.
813 (Or, more generally, a linker that handles initializations.)
814 -fno-gnu-linker says that collect2 will be used. */
816 int flag_gnu_linker
= 0;
818 int flag_gnu_linker
= 1;
824 /* Enable ssa conditional constant propagation. */
825 int flag_ssa_ccp
= 0;
827 /* Enable ssa aggressive dead code elimination. */
828 int flag_ssa_dce
= 0;
830 /* Tag all structures with __attribute__(packed). */
831 int flag_pack_struct
= 0;
833 /* Emit code to check for stack overflow; also may cause large objects
834 to be allocated dynamically. */
835 int flag_stack_check
;
837 /* When non-NULL, indicates that whenever space is allocated on the
838 stack, the resulting stack pointer must not pass this
839 address---that is, for stacks that grow downward, the stack pointer
840 must always be greater than or equal to this address; for stacks
841 that grow upward, the stack pointer must be less than this address.
842 At present, the rtx may be either a REG or a SYMBOL_REF, although
843 the support provided depends on the backend. */
846 /* -fcheck-memory-usage causes extra code to be generated in order to check
847 memory accesses. This is used by a detector of bad memory accesses such
849 int flag_check_memory_usage
= 0;
851 /* -fprefix-function-name causes function name to be prefixed. This
852 can be used with -fcheck-memory-usage to isolate code compiled with
853 -fcheck-memory-usage. */
854 int flag_prefix_function_name
= 0;
856 /* 0 if pointer arguments may alias each other. True in C.
857 1 if pointer arguments may not alias each other but may alias
859 2 if pointer arguments may not alias each other and may not
860 alias global variables. True in Fortran.
861 This defaults to 0 for C. */
862 int flag_argument_noalias
= 0;
864 /* Nonzero if we should do (language-dependent) alias analysis.
865 Typically, this analysis will assume that expressions of certain
866 types do not alias expressions of certain other types. Only used
867 if alias analysis (in general) is enabled. */
868 int flag_strict_aliasing
= 0;
870 /* Instrument functions with calls at entry and exit, for profiling. */
871 int flag_instrument_function_entry_exit
= 0;
873 /* Nonzero means ignore `#ident' directives. 0 means handle them.
874 On SVR4 targets, it also controls whether or not to emit a
875 string identifying the compiler. */
877 int flag_no_ident
= 0;
879 /* This will perform a peephole pass before sched2. */
880 int flag_peephole2
= 0;
882 /* This will try to guess branch probabilities. */
883 int flag_guess_branch_prob
= 0;
885 /* -fbounded-pointers causes gcc to compile pointers as composite
886 objects occupying three words: the pointer value, the base address
887 of the referent object, and the address immediately beyond the end
888 of the referent object. The base and extent allow us to perform
889 runtime bounds checking. -fbounded-pointers implies -fcheck-bounds. */
890 int flag_bounded_pointers
= 0;
892 /* -fcheck-bounds causes gcc to generate array bounds checks.
893 For C, C++: defaults to value of flag_bounded_pointers.
894 For ObjC: defaults to off.
895 For Java: defaults to on.
896 For Fortran: defaults to off.
897 For CHILL: defaults to off. */
898 int flag_bounds_check
= 0;
900 /* If one, renumber instruction UIDs to reduce the number of
901 unused UIDs if there are a lot of instructions. If greater than
902 one, unconditionally renumber instruction UIDs. */
903 int flag_renumber_insns
= 1;
905 /* Values of the -falign-* flags: how much to align labels in code.
906 0 means `use default', 1 means `don't align'.
907 For each variable, there is an _log variant which is the power
908 of two not less than the variable, for .align output. */
915 int align_labels_log
;
917 int align_functions_log
;
919 /* Table of supported debugging formats. */
923 /* Since PREFERRED_DEBUGGING_TYPE isn't necessarily a
924 constant expression, we use NO_DEBUG in its place. */
925 enum debug_info_type debug_type
;
926 int use_extensions_p
;
927 const char *description
;
931 { "", NO_DEBUG
, DEFAULT_GDB_EXTENSIONS
,
932 N_("Generate debugging info in default format") },
933 { "gdb", NO_DEBUG
, 1, N_("Generate debugging info in default extended format") },
934 #ifdef DBX_DEBUGGING_INFO
935 { "stabs", DBX_DEBUG
, 0, N_("Generate STABS format debug info") },
936 { "stabs+", DBX_DEBUG
, 1, N_("Generate extended STABS format debug info") },
938 #ifdef DWARF_DEBUGGING_INFO
939 { "dwarf", DWARF_DEBUG
, 0, N_("Generate DWARF-1 format debug info") },
940 { "dwarf+", DWARF_DEBUG
, 1,
941 N_("Generate extended DWARF-1 format debug info") },
943 #ifdef DWARF2_DEBUGGING_INFO
944 { "dwarf-2", DWARF2_DEBUG
, 0, N_("Generate DWARF-2 debug info") },
946 #ifdef XCOFF_DEBUGGING_INFO
947 { "xcoff", XCOFF_DEBUG
, 0, N_("Generate XCOFF format debug info") },
948 { "xcoff+", XCOFF_DEBUG
, 1, N_("Generate extended XCOFF format debug info") },
950 #ifdef SDB_DEBUGGING_INFO
951 { "coff", SDB_DEBUG
, 0, N_("Generate COFF format debug info") },
961 const char *description
;
963 lang_independent_options
;
967 /* Add or remove a leading underscore from user symbols. */
968 int flag_leading_underscore
= -1;
970 /* The user symbol prefix after having resolved same. */
971 const char *user_label_prefix
;
973 static const param_info lang_independent_params
[] = {
974 #define DEFPARAM(ENUM, OPTION, HELP, DEFAULT) \
975 { OPTION, DEFAULT, HELP },
976 #include "params.def"
981 /* A default for same. */
982 #ifndef USER_LABEL_PREFIX
983 #define USER_LABEL_PREFIX ""
986 /* Table of language-independent -f options.
987 STRING is the option name. VARIABLE is the address of the variable.
988 ON_VALUE is the value to store in VARIABLE
989 if `-fSTRING' is seen as an option.
990 (If `-fno-STRING' is seen as an option, the opposite value is stored.) */
992 lang_independent_options f_options
[] =
994 {"eliminate-dwarf2-dups", &flag_eliminate_dwarf2_dups
, 1,
995 N_("Perform DWARF2 duplicate elimination") },
996 {"float-store", &flag_float_store
, 1,
997 N_("Do not store floats in registers") },
998 {"volatile", &flag_volatile
, 1,
999 N_("Consider all mem refs through pointers as volatile") },
1000 {"volatile-global", &flag_volatile_global
, 1,
1001 N_("Consider all mem refs to global data to be volatile") },
1002 {"volatile-static", &flag_volatile_static
, 1,
1003 N_("Consider all mem refs to static data to be volatile") },
1004 {"defer-pop", &flag_defer_pop
, 1,
1005 N_("Defer popping functions args from stack until later") },
1006 {"omit-frame-pointer", &flag_omit_frame_pointer
, 1,
1007 N_("When possible do not generate stack frames") },
1008 {"optimize-sibling-calls", &flag_optimize_sibling_calls
, 1,
1009 N_("Optimize sibling and tail recursive calls") },
1010 {"cse-follow-jumps", &flag_cse_follow_jumps
, 1,
1011 N_("When running CSE, follow jumps to their targets") },
1012 {"cse-skip-blocks", &flag_cse_skip_blocks
, 1,
1013 N_("When running CSE, follow conditional jumps") },
1014 {"expensive-optimizations", &flag_expensive_optimizations
, 1,
1015 N_("Perform a number of minor, expensive optimisations") },
1016 {"thread-jumps", &flag_thread_jumps
, 1,
1017 N_("Perform jump threading optimisations") },
1018 {"strength-reduce", &flag_strength_reduce
, 1,
1019 N_("Perform strength reduction optimisations") },
1020 {"unroll-loops", &flag_unroll_loops
, 1,
1021 N_("Perform loop unrolling when iteration count is known") },
1022 {"unroll-all-loops", &flag_unroll_all_loops
, 1,
1023 N_("Perform loop unrolling for all loops") },
1024 {"move-all-movables", &flag_move_all_movables
, 1,
1025 N_("Force all loop invariant computations out of loops") },
1026 {"reduce-all-givs", &flag_reduce_all_givs
, 1,
1027 N_("Strength reduce all loop general induction variables") },
1028 {"writable-strings", &flag_writable_strings
, 1,
1029 N_("Store strings in writable data section") },
1030 {"peephole", &flag_no_peephole
, 0,
1031 N_("Enable machine specific peephole optimisations") },
1032 {"force-mem", &flag_force_mem
, 1,
1033 N_("Copy memory operands into registers before using") },
1034 {"force-addr", &flag_force_addr
, 1,
1035 N_("Copy memory address constants into regs before using") },
1036 {"function-cse", &flag_no_function_cse
, 0,
1037 N_("Allow function addresses to be held in registers") },
1038 {"inline-functions", &flag_inline_functions
, 1,
1039 N_("Integrate simple functions into their callers") },
1040 {"keep-inline-functions", &flag_keep_inline_functions
, 1,
1041 N_("Generate code for funcs even if they are fully inlined") },
1042 {"inline", &flag_no_inline
, 0,
1043 N_("Pay attention to the 'inline' keyword") },
1044 {"keep-static-consts", &flag_keep_static_consts
, 1,
1045 N_("Emit static const variables even if they are not used") },
1046 {"syntax-only", &flag_syntax_only
, 1,
1047 N_("Check for syntax errors, then stop") },
1048 {"shared-data", &flag_shared_data
, 1,
1049 N_("Mark data as shared rather than private") },
1050 {"caller-saves", &flag_caller_saves
, 1,
1051 N_("Enable saving registers around function calls") },
1052 {"pcc-struct-return", &flag_pcc_struct_return
, 1,
1053 N_("Return 'short' aggregates in memory, not registers") },
1054 {"reg-struct-return", &flag_pcc_struct_return
, 0,
1055 N_("Return 'short' aggregates in registers") },
1056 {"delayed-branch", &flag_delayed_branch
, 1,
1057 N_("Attempt to fill delay slots of branch instructions") },
1058 {"gcse", &flag_gcse
, 1,
1059 N_("Perform the global common subexpression elimination") },
1060 {"gcse-lm", &flag_gcse_lm
, 1,
1061 N_("Perform enhanced load motion during global subexpression elimination") },
1062 {"gcse-sm", &flag_gcse_sm
, 1,
1063 N_("Perform store motion after global subexpression elimination") },
1064 {"rerun-cse-after-loop", &flag_rerun_cse_after_loop
, 1,
1065 N_("Run CSE pass after loop optimisations") },
1066 {"rerun-loop-opt", &flag_rerun_loop_opt
, 1,
1067 N_("Run the loop optimiser twice") },
1068 {"delete-null-pointer-checks", &flag_delete_null_pointer_checks
, 1,
1069 N_("Delete useless null pointer checks") },
1070 {"pretend-float", &flag_pretend_float
, 1,
1071 N_("Pretend that host and target use the same FP format") },
1072 {"schedule-insns", &flag_schedule_insns
, 1,
1073 N_("Reschedule instructions before register allocation") },
1074 {"schedule-insns2", &flag_schedule_insns_after_reload
, 1,
1075 N_("Reschedule instructions after register allocation") },
1076 {"sched-interblock",&flag_schedule_interblock
, 1,
1077 N_("Enable scheduling across basic blocks") },
1078 {"sched-spec",&flag_schedule_speculative
, 1,
1079 N_("Allow speculative motion of non-loads") },
1080 {"sched-spec-load",&flag_schedule_speculative_load
, 1,
1081 N_("Allow speculative motion of some loads") },
1082 {"sched-spec-load-dangerous",&flag_schedule_speculative_load_dangerous
, 1,
1083 N_("Allow speculative motion of more loads") },
1084 {"branch-count-reg",&flag_branch_on_count_reg
, 1,
1085 N_("Replace add,compare,branch with branch on count reg") },
1086 {"pic", &flag_pic
, 1,
1087 N_("Generate position independent code, if possible") },
1088 {"PIC", &flag_pic
, 2, ""},
1089 {"exceptions", &flag_exceptions
, 1,
1090 N_("Enable exception handling") },
1091 {"unwind-tables", &flag_unwind_tables
, 1,
1092 N_("Just generate unwind tables for exception handling") },
1093 {"non-call-exceptions", &flag_non_call_exceptions
, 1,
1094 N_("Support synchronous non-call exceptions") },
1095 {"profile-arcs", &profile_arc_flag
, 1,
1096 N_("Insert arc based program profiling code") },
1097 {"test-coverage", &flag_test_coverage
, 1,
1098 N_("Create data files needed by gcov") },
1099 {"branch-probabilities", &flag_branch_probabilities
, 1,
1100 N_("Use profiling information for branch probabilities") },
1101 {"reorder-blocks", &flag_reorder_blocks
, 1,
1102 N_("Reorder basic blocks to improve code placement") },
1103 {"rename-registers", &flag_rename_registers
, 1,
1104 N_("Do the register renaming optimization pass") },
1105 {"common", &flag_no_common
, 0,
1106 N_("Do not put unitialised globals in the common section") },
1107 {"inhibit-size-directive", &flag_inhibit_size_directive
, 1,
1108 N_("Do not generate .size directives") },
1109 {"function-sections", &flag_function_sections
, 1,
1110 N_("place each function into its own section") },
1111 {"data-sections", &flag_data_sections
, 1,
1112 N_("place data items into their own section") },
1113 {"verbose-asm", &flag_verbose_asm
, 1,
1114 N_("Add extra commentry to assembler output") },
1115 {"gnu-linker", &flag_gnu_linker
, 1,
1116 N_("Output GNU ld formatted global initialisers") },
1117 {"regmove", &flag_regmove
, 1,
1118 N_("Enables a register move optimisation") },
1119 {"optimize-register-move", &flag_regmove
, 1,
1120 N_("Do the full regmove optimization pass") },
1121 {"pack-struct", &flag_pack_struct
, 1,
1122 N_("Pack structure members together without holes") },
1123 {"stack-check", &flag_stack_check
, 1,
1124 N_("Insert stack checking code into the program") },
1125 {"argument-alias", &flag_argument_noalias
, 0,
1126 N_("Specify that arguments may alias each other & globals") },
1127 {"argument-noalias", &flag_argument_noalias
, 1,
1128 N_("Assume arguments may alias globals but not each other") },
1129 {"argument-noalias-global", &flag_argument_noalias
, 2,
1130 N_("Assume arguments do not alias each other or globals") },
1131 {"strict-aliasing", &flag_strict_aliasing
, 1,
1132 N_("Assume strict aliasing rules apply") },
1133 {"align-loops", &align_loops
, 0,
1134 N_("Align the start of loops") },
1135 {"align-jumps", &align_jumps
, 0,
1136 N_("Align labels which are only reached by jumping") },
1137 {"align-labels", &align_labels
, 0,
1138 N_("Align all labels") },
1139 {"align-functions", &align_functions
, 0,
1140 N_("Align the start of functions") },
1141 {"check-memory-usage", &flag_check_memory_usage
, 1,
1142 N_("Generate code to check every memory access") },
1143 {"prefix-function-name", &flag_prefix_function_name
, 1,
1144 N_("Add a prefix to all function names") },
1145 {"dump-unnumbered", &flag_dump_unnumbered
, 1,
1146 N_("Suppress output of instruction numbers and line number notes in debugging dumps") },
1147 {"instrument-functions", &flag_instrument_function_entry_exit
, 1,
1148 N_("Instrument function entry/exit with profiling calls") },
1149 {"ssa", &flag_ssa
, 1,
1150 N_("Enable SSA optimizations") },
1151 {"ssa-ccp", &flag_ssa_ccp
, 1,
1152 N_("Enable SSA conditonal constant propagation") },
1153 {"ssa-dce", &flag_ssa_dce
, 1,
1154 N_("Enable aggressive SSA dead code elimination") },
1155 {"leading-underscore", &flag_leading_underscore
, 1,
1156 N_("External symbols have a leading underscore") },
1157 {"ident", &flag_no_ident
, 0,
1158 N_("Process #ident directives") },
1159 { "peephole2", &flag_peephole2
, 1,
1160 N_("Enables an rtl peephole pass run before sched2") },
1161 { "guess-branch-probability", &flag_guess_branch_prob
, 1,
1162 N_("Enables guessing of branch probabilities") },
1163 {"math-errno", &flag_errno_math
, 1,
1164 N_("Set errno after built-in math functions") },
1165 {"trapping-math", &flag_trapping_math
, 1,
1166 N_("Floating-point operations can trap") },
1167 {"unsafe-math-optimizations", &flag_unsafe_math_optimizations
, 1,
1168 N_("Allow math optimizations that may violate IEEE or ANSI standards") },
1169 {"bounded-pointers", &flag_bounded_pointers
, 1,
1170 N_("Compile pointers as triples: value, base & end") },
1171 {"bounds-check", &flag_bounds_check
, 1,
1172 N_("Generate code to check bounds before dereferencing pointers and arrays") },
1173 {"single-precision-constant", &flag_single_precision_constant
, 1,
1174 N_("Convert floating point constant to single precision constant") },
1175 {"time-report", &time_report
, 1,
1176 N_("Report time taken by each compiler pass at end of run") },
1177 {"mem-report", &mem_report
, 1,
1178 N_("Report on permanent memory allocation at end of run") },
1179 { "trapv", &flag_trapv
, 1,
1180 N_("Trap for signed overflow in addition / subtraction / multiplication.") },
1183 /* Table of language-specific options. */
1185 static struct lang_opt
1188 const char *description
;
1190 documented_lang_options
[] =
1192 /* In order not to overload the --help output, the convention
1193 used here is to only describe those options which are not
1194 enabled by default. */
1197 N_("Compile just for ISO C89") },
1198 { "-fallow-single-precision",
1199 N_("Do not promote floats to double if using -traditional") },
1201 N_("Determine language standard") },
1203 { "-fsigned-bitfields", "" },
1204 { "-funsigned-bitfields",
1205 N_("Make bitfields by unsigned by default") },
1206 { "-fno-signed-bitfields", "" },
1207 { "-fno-unsigned-bitfields","" },
1209 N_("Make 'char' be signed by default") },
1210 { "-funsigned-char",
1211 N_("Make 'char' be unsigned by default") },
1212 { "-fno-signed-char", "" },
1213 { "-fno-unsigned-char", "" },
1215 { "-ftraditional", "" },
1217 N_("Attempt to support traditional K&R style C") },
1218 { "-fnotraditional", "" },
1219 { "-fno-traditional", "" },
1223 N_("Do not recognise the 'asm' keyword") },
1224 { "-fbuiltin", "" },
1226 N_("Do not recognise any built in functions") },
1228 N_("Assume normal C execution environment") },
1229 { "-fno-hosted", "" },
1231 N_("Assume that standard libraries & main might not exist") },
1232 { "-fno-freestanding", "" },
1233 { "-fcond-mismatch",
1234 N_("Allow different types as args of ? operator") },
1235 { "-fno-cond-mismatch", "" },
1236 { "-fdollars-in-identifiers",
1237 N_("Allow the use of $ inside identifiers") },
1238 { "-fno-dollars-in-identifiers", "" },
1239 { "-fpreprocessed", "" },
1240 { "-fno-preprocessed", "" },
1242 N_("Use the same size for double as for float") },
1243 { "-fno-short-double", "" },
1245 N_("Use the smallest fitting integer to hold enums") },
1246 { "-fno-short-enums", "" },
1248 N_("Override the underlying type for wchar_t to `unsigned short'") },
1249 { "-fno-short-wchar", "" },
1252 N_("Enable most warning messages") },
1253 { "-Wbad-function-cast",
1254 N_("Warn about casting functions to incompatible types") },
1255 { "-Wno-bad-function-cast", "" },
1256 { "-Wno-missing-noreturn", "" },
1257 { "-Wmissing-format-attribute",
1258 N_("Warn about functions which might be candidates for format attributes") },
1259 { "-Wno-missing-format-attribute", "" },
1261 N_("Warn about casts which discard qualifiers") },
1262 { "-Wno-cast-qual", "" },
1263 { "-Wchar-subscripts",
1264 N_("Warn about subscripts whose type is 'char'") },
1265 { "-Wno-char-subscripts", "" },
1267 N_("Warn if nested comments are detected") },
1268 { "-Wno-comment", "" },
1270 N_("Warn if nested comments are detected") },
1271 { "-Wno-comments", "" },
1273 N_("Warn about possibly confusing type conversions") },
1274 { "-Wno-conversion", "" },
1276 N_("Warn about printf/scanf/strftime/strfmon format anomalies") },
1277 { "-Wno-format", "" },
1278 { "-Wformat-y2k", "" },
1279 { "-Wno-format-y2k",
1280 N_("Don't warn about strftime formats yielding 2 digit years") },
1281 { "-Wformat-extra-args", "" },
1282 { "-Wno-format-extra-args",
1283 N_("Don't warn about too many arguments to format functions") },
1284 { "-Wformat-nonliteral",
1285 N_("Warn about non-string-literal format strings") },
1286 { "-Wno-format-nonliteral", "" },
1287 { "-Wformat-security",
1288 N_("Warn about possible security problems with format functions") },
1289 { "-Wno-format-security", "" },
1290 { "-Wimplicit-function-declaration",
1291 N_("Warn about implicit function declarations") },
1292 { "-Wno-implicit-function-declaration", "" },
1293 { "-Werror-implicit-function-declaration", "" },
1295 N_("Warn when a declaration does not specify a type") },
1296 { "-Wno-implicit-int", "" },
1297 { "-Wimplicit", "" },
1298 { "-Wno-implicit", "" },
1300 N_("Warn about the use of the #import directive") },
1301 { "-Wno-import", "" },
1302 { "-Wlong-long","" },
1304 N_("Do not warn about using 'long long' when -pedantic") },
1306 N_("Warn about suspicious declarations of main") },
1307 { "-Wno-main", "" },
1308 { "-Wmissing-braces",
1309 N_("Warn about possibly missing braces around initialisers") },
1310 { "-Wno-missing-braces", "" },
1311 { "-Wmissing-declarations",
1312 N_("Warn about global funcs without previous declarations") },
1313 { "-Wno-missing-declarations", "" },
1314 { "-Wmissing-prototypes",
1315 N_("Warn about global funcs without prototypes") },
1316 { "-Wno-missing-prototypes", "" },
1318 N_("Warn about use of multicharacter literals") },
1319 { "-Wno-multichar", "" },
1320 { "-Wnested-externs",
1321 N_("Warn about externs not at file scope level") },
1322 { "-Wno-nested-externs", "" },
1324 N_("Warn about possible missing parentheses") },
1325 { "-Wno-parentheses", "" },
1326 { "-Wsequence-point",
1327 N_("Warn about possible violations of sequence point rules") },
1328 { "-Wno-sequence-point", "" },
1329 { "-Wpointer-arith",
1330 N_("Warn about function pointer arithmetic") },
1331 { "-Wno-pointer-arith", "" },
1332 { "-Wredundant-decls",
1333 N_("Warn about multiple declarations of the same object") },
1334 { "-Wno-redundant-decls", "" },
1336 N_("Warn about signed/unsigned comparisons") },
1337 { "-Wno-sign-compare", "" },
1339 N_("Warn about testing equality of floating point numbers") },
1340 { "-Wno-float-equal", "" },
1341 { "-Wunknown-pragmas",
1342 N_("Warn about unrecognized pragmas") },
1343 { "-Wno-unknown-pragmas", "" },
1344 { "-Wstrict-prototypes",
1345 N_("Warn about non-prototyped function decls") },
1346 { "-Wno-strict-prototypes", "" },
1348 N_("Warn about constructs whose meaning change in ISO C") },
1349 { "-Wno-traditional", "" },
1351 N_("Warn when trigraphs are encountered") },
1352 { "-Wno-trigraphs", "" },
1354 { "-Wno-undef", "" },
1355 { "-Wwrite-strings",
1356 N_("Mark strings as 'const char *'") },
1357 { "-Wno-write-strings", "" },
1359 #define DEFINE_LANG_NAME(NAME) { NULL, NAME },
1361 #include "options.h"
1365 /* Here is a table, controlled by the tm.h file, listing each -m switch
1366 and which bits in `target_switches' it should set or clear.
1367 If VALUE is positive, it is bits to set.
1368 If VALUE is negative, -VALUE is bits to clear.
1369 (The sign bit is not used so there is no confusion.) */
1375 const char *description
;
1377 target_switches
[] = TARGET_SWITCHES
;
1379 /* This table is similar, but allows the switch to have a value. */
1381 #ifdef TARGET_OPTIONS
1385 const char **variable
;
1386 const char *description
;
1388 target_options
[] = TARGET_OPTIONS
;
1391 /* Options controlling warnings. */
1393 /* Don't print warning messages. -w. */
1395 int inhibit_warnings
= 0;
1397 /* Don't suppress warnings from system headers. -Wsystem-headers. */
1399 int warn_system_headers
= 0;
1401 /* Print various extra warnings. -W. */
1403 int extra_warnings
= 0;
1405 /* Treat warnings as errors. -Werror. */
1407 int warnings_are_errors
= 0;
1409 /* Nonzero to warn about unused variables, functions et.al. */
1411 int warn_unused_function
;
1412 int warn_unused_label
;
1413 int warn_unused_parameter
;
1414 int warn_unused_variable
;
1415 int warn_unused_value
;
1418 set_Wunused (setting
)
1421 warn_unused_function
= setting
;
1422 warn_unused_label
= setting
;
1423 /* Unused function parameter warnings are reported when either ``-W
1424 -Wunused'' or ``-Wunused-parameter'' is specified. Differentiate
1425 -Wunused by setting WARN_UNUSED_PARAMETER to -1. */
1427 warn_unused_parameter
= 0;
1428 else if (!warn_unused_parameter
)
1429 warn_unused_parameter
= -1;
1430 warn_unused_variable
= setting
;
1431 warn_unused_value
= setting
;
1434 /* Nonzero to warn about code which is never reached. */
1436 int warn_notreached
;
1438 /* Nonzero to warn about variables used before they are initialized. */
1440 int warn_uninitialized
;
1442 /* Nonzero means warn about all declarations which shadow others. */
1446 /* Warn if a switch on an enum fails to have a case for every enum value. */
1450 /* Nonzero means warn about function definitions that default the return type
1451 or that use a null return and have a return-type other than void. */
1453 int warn_return_type
;
1455 /* Nonzero means warn about pointer casts that increase the required
1456 alignment of the target type (and might therefore lead to a crash
1457 due to a misaligned access). */
1459 int warn_cast_align
;
1461 /* Nonzero means warn about any objects definitions whose size is larger
1462 than N bytes. Also want about function definitions whose returned
1463 values are larger than N bytes. The value N is in `larger_than_size'. */
1465 int warn_larger_than
;
1466 HOST_WIDE_INT larger_than_size
;
1468 /* Nonzero means warn if inline function is too large. */
1472 /* Warn if a function returns an aggregate,
1473 since there are often incompatible calling conventions for doing this. */
1475 int warn_aggregate_return
;
1477 /* Warn if packed attribute on struct is unnecessary and inefficient. */
1481 /* Warn when gcc pads a structure to an alignment boundary. */
1485 /* Warn when an optimization pass is disabled. */
1487 int warn_disabled_optimization
;
1489 /* Warn about functions which might be candidates for attribute noreturn. */
1491 int warn_missing_noreturn
;
1493 /* Likewise for -W. */
1495 lang_independent_options W_options
[] =
1497 {"unused-function", &warn_unused_function
, 1,
1498 N_("Warn when a function is unused") },
1499 {"unused-label", &warn_unused_label
, 1,
1500 N_("Warn when a label is unused") },
1501 {"unused-parameter", &warn_unused_parameter
, 1,
1502 N_("Warn when a function parameter is unused") },
1503 {"unused-variable", &warn_unused_variable
, 1,
1504 N_("Warn when a variable is unused") },
1505 {"unused-value", &warn_unused_value
, 1,
1506 N_("Warn when an expression value is unused") },
1507 {"system-headers", &warn_system_headers
, 1,
1508 N_("Do not suppress warnings from system headers") },
1509 {"error", &warnings_are_errors
, 1,
1510 N_("Treat all warnings as errors") },
1511 {"shadow", &warn_shadow
, 1,
1512 N_("Warn when one local variable shadows another") },
1513 {"switch", &warn_switch
, 1,
1514 N_("Warn about enumerated switches missing a specific case") },
1515 {"aggregate-return", &warn_aggregate_return
, 1,
1516 N_("Warn about returning structures, unions or arrays") },
1517 {"cast-align", &warn_cast_align
, 1,
1518 N_("Warn about pointer casts which increase alignment") },
1519 {"unreachable-code", &warn_notreached
, 1,
1520 N_("Warn about code that will never be executed") },
1521 {"uninitialized", &warn_uninitialized
, 1,
1522 N_("Warn about unitialized automatic variables") },
1523 {"inline", &warn_inline
, 1,
1524 N_("Warn when an inlined function cannot be inlined") },
1525 {"packed", &warn_packed
, 1,
1526 N_("Warn when the packed attribute has no effect on struct layout") },
1527 {"padded", &warn_padded
, 1,
1528 N_("Warn when padding is required to align struct members") },
1529 {"disabled-optimization", &warn_disabled_optimization
, 1,
1530 N_("Warn when an optimization pass is disabled") },
1531 {"missing-noreturn", &warn_missing_noreturn
, 1,
1532 N_("Warn about functions which might be candidates for attribute noreturn") }
1535 /* The following routines are useful in setting all the flags that
1536 -ffast-math and -fno-fast-math imply. */
1539 set_fast_math_flags ()
1541 flag_trapping_math
= 0;
1542 flag_unsafe_math_optimizations
= 1;
1543 flag_errno_math
= 0;
1547 set_no_fast_math_flags ()
1549 flag_trapping_math
= 1;
1550 flag_unsafe_math_optimizations
= 0;
1551 flag_errno_math
= 1;
1555 /* Output files for assembler code (real compiler output)
1556 and debugging dumps. */
1559 FILE *aux_info_file
;
1560 FILE *rtl_dump_file
= NULL
;
1562 /* Decode the string P as an integral parameter.
1563 If the string is indeed an integer return its numeric value else
1564 issue an Invalid Option error for the option PNAME and return DEFVAL.
1565 If PNAME is zero just return DEFVAL, do not call error. */
1568 read_integral_parameter (p
, pname
, defval
)
1573 const char *endp
= p
;
1577 if (*endp
>= '0' && *endp
<= '9')
1586 error ("Invalid option `%s'", pname
);
1594 /* This is the default decl_printable_name function. */
1597 decl_name (decl
, verbosity
)
1599 int verbosity ATTRIBUTE_UNUSED
;
1601 return IDENTIFIER_POINTER (DECL_NAME (decl
));
1605 /* This calls abort and is used to avoid problems when abort if a macro.
1606 It is used when we need to pass the address of abort. */
1614 /* When `malloc.c' is compiled with `rcheck' defined,
1615 it calls this function to report clobberage. */
1619 const char *s ATTRIBUTE_UNUSED
;
1624 /* Return the logarithm of X, base 2, considering X unsigned,
1625 if X is a power of 2. Otherwise, returns -1.
1627 This should be used via the `exact_log2' macro. */
1631 register unsigned HOST_WIDE_INT x
;
1633 register int log
= 0;
1634 /* Test for 0 or a power of 2. */
1635 if (x
== 0 || x
!= (x
& -x
))
1637 while ((x
>>= 1) != 0)
1642 /* Given X, an unsigned number, return the largest int Y such that 2**Y <= X.
1643 If X is 0, return -1.
1645 This should be used via the floor_log2 macro. */
1649 register unsigned HOST_WIDE_INT x
;
1651 register int log
= -1;
1658 static int float_handler_set
;
1660 jmp_buf float_handler
;
1662 /* Signals actually come here. */
1665 float_signal (signo
)
1666 /* If this is missing, some compilers complain. */
1667 int signo ATTRIBUTE_UNUSED
;
1669 if (float_handled
== 0)
1670 crash_signal (signo
);
1673 /* On System-V derived systems, we must reinstall the signal handler.
1674 This is harmless on BSD-derived systems. */
1675 signal (SIGFPE
, float_signal
);
1676 longjmp (float_handler
, 1);
1679 /* Specify where to longjmp to when a floating arithmetic error happens.
1680 If HANDLER is 0, it means don't handle the errors any more. */
1683 set_float_handler (handler
)
1686 float_handled
= (handler
!= 0);
1688 memcpy (float_handler
, handler
, sizeof (float_handler
));
1690 if (float_handled
&& ! float_handler_set
)
1692 signal (SIGFPE
, float_signal
);
1693 float_handler_set
= 1;
1697 /* This is a wrapper function for code which might elicit an
1698 arithmetic exception. That code should be passed in as a function
1699 pointer FN, and one argument DATA. DATA is usually a struct which
1700 contains the real input and output for function FN. This function
1701 returns 0 (failure) if longjmp was called (i.e. an exception
1702 occured.) It returns 1 (success) otherwise. */
1705 do_float_handler (fn
, data
)
1706 void (*fn
) PARAMS ((PTR
));
1713 /* We got here via longjmp () caused by an exception in function
1715 set_float_handler (NULL
);
1719 set_float_handler (buf
);
1721 set_float_handler (NULL
);
1725 /* Handler for fatal signals, such as SIGSEGV. These are transformed
1726 into ICE messages, which is much more user friendly. */
1729 crash_signal (signo
)
1732 internal_error ("Internal error: %s", strsignal (signo
));
1735 /* Strip off a legitimate source ending from the input string NAME of
1736 length LEN. Rather than having to know the names used by all of
1737 our front ends, we strip off an ending of a period followed by
1738 up to five characters. (Java uses ".class".) */
1741 strip_off_ending (name
, len
)
1746 for (i
= 2; i
< 6 && len
> i
; i
++)
1748 if (name
[len
- i
] == '.')
1750 name
[len
- i
] = '\0';
1756 /* Output a quoted string. */
1759 output_quoted_string (asm_file
, string
)
1763 #ifdef OUTPUT_QUOTED_STRING
1764 OUTPUT_QUOTED_STRING (asm_file
, string
);
1768 putc ('\"', asm_file
);
1769 while ((c
= *string
++) != 0)
1771 if (c
== '\"' || c
== '\\')
1772 putc ('\\', asm_file
);
1775 putc ('\"', asm_file
);
1779 /* Output a file name in the form wanted by System V. */
1782 output_file_directive (asm_file
, input_name
)
1784 const char *input_name
;
1786 int len
= strlen (input_name
);
1787 const char *na
= input_name
+ len
;
1789 /* NA gets INPUT_NAME sans directory names. */
1790 while (na
> input_name
)
1792 if (IS_DIR_SEPARATOR (na
[-1]))
1797 #ifdef ASM_OUTPUT_MAIN_SOURCE_FILENAME
1798 ASM_OUTPUT_MAIN_SOURCE_FILENAME (asm_file
, na
);
1800 #ifdef ASM_OUTPUT_SOURCE_FILENAME
1801 ASM_OUTPUT_SOURCE_FILENAME (asm_file
, na
);
1803 fprintf (asm_file
, "\t.file\t");
1804 output_quoted_string (asm_file
, na
);
1805 fputc ('\n', asm_file
);
1810 /* Routine to open a dump file. Return true if the dump file is enabled. */
1813 open_dump_file (index
, decl
)
1814 enum dump_file_index index
;
1818 const char *open_arg
;
1821 if (! dump_file
[index
].enabled
)
1824 timevar_push (TV_DUMP
);
1825 if (rtl_dump_file
!= NULL
)
1826 fclose (rtl_dump_file
);
1828 sprintf (seq
, ".%02d.", index
);
1830 if (! dump_file
[index
].initialized
)
1832 /* If we've not initialized the files, do so now. */
1833 if (graph_dump_format
!= no_graph
1834 && dump_file
[index
].graph_dump_p
)
1836 dump_name
= concat (seq
, dump_file
[index
].extension
, NULL
);
1837 clean_graph_dump_file (dump_base_name
, dump_name
);
1840 dump_file
[index
].initialized
= 1;
1846 dump_name
= concat (dump_base_name
, seq
,
1847 dump_file
[index
].extension
, NULL
);
1849 rtl_dump_file
= fopen (dump_name
, open_arg
);
1850 if (rtl_dump_file
== NULL
)
1851 fatal_io_error ("can't open %s", dump_name
);
1856 fprintf (rtl_dump_file
, "\n;; Function %s\n\n",
1857 decl_printable_name (decl
, 2));
1859 timevar_pop (TV_DUMP
);
1863 /* Routine to close a dump file. */
1866 close_dump_file (index
, func
, insns
)
1867 enum dump_file_index index
;
1868 void (*func
) PARAMS ((FILE *, rtx
));
1871 if (! rtl_dump_file
)
1874 timevar_push (TV_DUMP
);
1876 && graph_dump_format
!= no_graph
1877 && dump_file
[index
].graph_dump_p
)
1882 sprintf (seq
, ".%02d.", index
);
1883 suffix
= concat (seq
, dump_file
[index
].extension
, NULL
);
1884 print_rtl_graph_with_bb (dump_base_name
, suffix
, insns
);
1889 func (rtl_dump_file
, insns
);
1891 fflush (rtl_dump_file
);
1892 fclose (rtl_dump_file
);
1894 rtl_dump_file
= NULL
;
1895 timevar_pop (TV_DUMP
);
1898 /* Do any final processing required for the declarations in VEC, of
1899 which there are LEN. We write out inline functions and variables
1900 that have been deferred until this point, but which are required.
1901 Returns non-zero if anything was put out. */
1904 wrapup_global_declarations (vec
, len
)
1911 int output_something
= 0;
1913 for (i
= 0; i
< len
; i
++)
1917 /* We're not deferring this any longer. */
1918 DECL_DEFER_OUTPUT (decl
) = 0;
1920 if (TREE_CODE (decl
) == VAR_DECL
&& DECL_SIZE (decl
) == 0
1921 && incomplete_decl_finalize_hook
!= 0)
1922 (*incomplete_decl_finalize_hook
) (decl
);
1925 /* Now emit any global variables or functions that we have been
1926 putting off. We need to loop in case one of the things emitted
1927 here references another one which comes earlier in the list. */
1931 for (i
= 0; i
< len
; i
++)
1935 if (TREE_ASM_WRITTEN (decl
) || DECL_EXTERNAL (decl
))
1938 /* Don't write out static consts, unless we still need them.
1940 We also keep static consts if not optimizing (for debugging),
1941 unless the user specified -fno-keep-static-consts.
1942 ??? They might be better written into the debug information.
1943 This is possible when using DWARF.
1945 A language processor that wants static constants to be always
1946 written out (even if it is not used) is responsible for
1947 calling rest_of_decl_compilation itself. E.g. the C front-end
1948 calls rest_of_decl_compilation from finish_decl.
1949 One motivation for this is that is conventional in some
1950 environments to write things like:
1951 static const char rcsid[] = "... version string ...";
1952 intending to force the string to be in the executable.
1954 A language processor that would prefer to have unneeded
1955 static constants "optimized away" would just defer writing
1956 them out until here. E.g. C++ does this, because static
1957 constants are often defined in header files.
1959 ??? A tempting alternative (for both C and C++) would be
1960 to force a constant to be written if and only if it is
1961 defined in a main file, as opposed to an include file. */
1963 if (TREE_CODE (decl
) == VAR_DECL
&& TREE_STATIC (decl
)
1964 && (((! TREE_READONLY (decl
) || TREE_PUBLIC (decl
))
1965 && !DECL_COMDAT (decl
))
1967 && flag_keep_static_consts
1968 && !DECL_ARTIFICIAL (decl
))
1969 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl
))))
1972 rest_of_decl_compilation (decl
, NULL
, 1, 1);
1975 if (TREE_CODE (decl
) == FUNCTION_DECL
1976 && DECL_INITIAL (decl
) != 0
1977 && DECL_SAVED_INSNS (decl
) != 0
1978 && (flag_keep_inline_functions
1979 || (TREE_PUBLIC (decl
) && !DECL_COMDAT (decl
))
1980 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl
))))
1983 output_inline_function (decl
);
1988 output_something
= 1;
1992 return output_something
;
1995 /* Issue appropriate warnings for the global declarations in VEC (of
1996 which there are LEN). Output debugging information for them. */
1999 check_global_declarations (vec
, len
)
2006 for (i
= 0; i
< len
; i
++)
2010 if (TREE_CODE (decl
) == VAR_DECL
&& TREE_STATIC (decl
)
2011 && ! TREE_ASM_WRITTEN (decl
))
2012 /* Cancel the RTL for this decl so that, if debugging info
2013 output for global variables is still to come,
2014 this one will be omitted. */
2015 SET_DECL_RTL (decl
, NULL_RTX
);
2017 /* Warn about any function
2018 declared static but not defined.
2019 We don't warn about variables,
2020 because many programs have static variables
2021 that exist only to get some text into the object file. */
2022 if (TREE_CODE (decl
) == FUNCTION_DECL
2023 && (warn_unused_function
2024 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl
)))
2025 && DECL_INITIAL (decl
) == 0
2026 && DECL_EXTERNAL (decl
)
2027 && ! DECL_ARTIFICIAL (decl
)
2028 && ! TREE_PUBLIC (decl
))
2030 if (TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl
)))
2031 pedwarn_with_decl (decl
,
2032 "`%s' used but never defined");
2034 warning_with_decl (decl
,
2035 "`%s' declared `static' but never defined");
2036 /* This symbol is effectively an "extern" declaration now. */
2037 TREE_PUBLIC (decl
) = 1;
2038 assemble_external (decl
);
2041 /* Warn about static fns or vars defined but not used,
2042 but not about inline functions or static consts
2043 since defining those in header files is normal practice. */
2044 if (((warn_unused_function
2045 && TREE_CODE (decl
) == FUNCTION_DECL
&& ! DECL_INLINE (decl
))
2046 || (warn_unused_variable
2047 && TREE_CODE (decl
) == VAR_DECL
&& ! TREE_READONLY (decl
)))
2048 && ! DECL_IN_SYSTEM_HEADER (decl
)
2049 && ! DECL_EXTERNAL (decl
)
2050 && ! TREE_PUBLIC (decl
)
2051 && ! TREE_USED (decl
)
2052 && (TREE_CODE (decl
) == FUNCTION_DECL
|| ! DECL_REGISTER (decl
))
2053 /* The TREE_USED bit for file-scope decls
2054 is kept in the identifier, to handle multiple
2055 external decls in different scopes. */
2056 && ! TREE_USED (DECL_NAME (decl
)))
2057 warning_with_decl (decl
, "`%s' defined but not used");
2059 timevar_push (TV_SYMOUT
);
2060 (*debug_hooks
->global_decl
) (decl
);
2061 timevar_pop (TV_SYMOUT
);
2065 /* Save the current INPUT_FILENAME and LINENO on the top entry in the
2066 INPUT_FILE_STACK. Push a new entry for FILE and LINE, and set the
2067 INPUT_FILENAME and LINENO accordingly. */
2070 push_srcloc (file
, line
)
2074 struct file_stack
*fs
;
2076 if (input_file_stack
)
2078 input_file_stack
->name
= input_filename
;
2079 input_file_stack
->line
= lineno
;
2082 fs
= (struct file_stack
*) xmalloc (sizeof (struct file_stack
));
2083 fs
->name
= input_filename
= file
;
2084 fs
->line
= lineno
= line
;
2085 fs
->indent_level
= 0;
2086 fs
->next
= input_file_stack
;
2087 input_file_stack
= fs
;
2088 input_file_stack_tick
++;
2091 /* Pop the top entry off the stack of presently open source files.
2092 Restore the INPUT_FILENAME and LINENO from the new topmost entry on
2098 struct file_stack
*fs
;
2100 fs
= input_file_stack
;
2101 input_file_stack
= fs
->next
;
2103 input_file_stack_tick
++;
2104 /* The initial source file is never popped. */
2105 if (!input_file_stack
)
2107 input_filename
= input_file_stack
->name
;
2108 lineno
= input_file_stack
->line
;
2111 /* Compile an entire file of output from cpp, named NAME.
2112 Write a file of assembly output and various debugging dumps. */
2120 int name_specified
= name
!= 0;
2122 if (dump_base_name
== 0)
2123 dump_base_name
= name
? name
: "gccdump";
2128 /* Start timing total execution time. */
2131 timevar_start (TV_TOTAL
);
2133 /* Open assembler code output file. Do this even if -fsyntax-only is on,
2134 because then the driver will have provided the name of a temporary
2135 file or bit bucket for us. */
2137 if (! name_specified
&& asm_file_name
== 0)
2138 asm_out_file
= stdout
;
2141 if (asm_file_name
== 0)
2143 int len
= strlen (dump_base_name
);
2144 char *dumpname
= (char *) xmalloc (len
+ 6);
2145 memcpy (dumpname
, dump_base_name
, len
+ 1);
2146 strip_off_ending (dumpname
, len
);
2147 strcat (dumpname
, ".s");
2148 asm_file_name
= dumpname
;
2150 if (!strcmp (asm_file_name
, "-"))
2151 asm_out_file
= stdout
;
2153 asm_out_file
= fopen (asm_file_name
, "w");
2154 if (asm_out_file
== 0)
2155 fatal_io_error ("can't open %s for writing", asm_file_name
);
2158 /* Initialize data in various passes. */
2161 name
= init_parse (name
);
2162 init_emit_once (debug_info_level
== DINFO_LEVEL_NORMAL
2163 || debug_info_level
== DINFO_LEVEL_VERBOSE
2164 || flag_test_coverage
2165 || warn_notreached
);
2168 init_decl_processing ();
2174 init_function_once ();
2175 init_stor_layout_once ();
2176 init_varasm_once ();
2177 init_EXPR_INSN_LIST_cache ();
2179 /* The following initialization functions need to generate rtl, so
2180 provide a dummy function context for them. */
2181 init_dummy_function_start ();
2184 if (flag_caller_saves
)
2185 init_caller_save ();
2186 expand_dummy_function_end ();
2188 /* If auxiliary info generation is desired, open the output file.
2189 This goes in the same directory as the source file--unlike
2190 all the other output files. */
2191 if (flag_gen_aux_info
)
2193 aux_info_file
= fopen (aux_info_file_name
, "w");
2194 if (aux_info_file
== 0)
2195 fatal_io_error ("can't open %s", aux_info_file_name
);
2198 #ifdef IO_BUFFER_SIZE
2199 setvbuf (asm_out_file
, (char *) xmalloc (IO_BUFFER_SIZE
),
2200 _IOFBF
, IO_BUFFER_SIZE
);
2204 name
= ggc_strdup (name
);
2206 input_filename
= name
;
2208 /* Put an entry on the input file stack for the main input file. */
2209 push_srcloc (input_filename
, 0);
2211 /* Perform language-specific initialization.
2212 This may set main_input_filename. */
2213 if (lang_hooks
.init
)
2214 (*lang_hooks
.init
) ();
2216 /* If the input doesn't start with a #line, use the input name
2217 as the official input file name. */
2218 if (main_input_filename
== 0)
2219 main_input_filename
= name
;
2221 if (flag_syntax_only
)
2223 write_symbols
= NO_DEBUG
;
2225 profile_block_flag
= 0;
2229 #ifdef ASM_FILE_START
2230 ASM_FILE_START (asm_out_file
);
2233 #ifdef ASM_COMMENT_START
2234 if (flag_verbose_asm
)
2236 /* Print the list of options in effect. */
2237 print_version (asm_out_file
, ASM_COMMENT_START
);
2238 print_switch_values (asm_out_file
, 0, MAX_LINE
,
2239 ASM_COMMENT_START
, " ", "\n");
2240 /* Add a blank line here so it appears in assembler output but not
2242 fprintf (asm_out_file
, "\n");
2245 } /* ! flag_syntax_only */
2247 /* Set up the debug hooks based on write_symbols. Default to doing
2249 debug_hooks
= &do_nothing_debug_hooks
;
2250 #if defined(DBX_DEBUGGING_INFO)
2251 if (write_symbols
== DBX_DEBUG
)
2252 debug_hooks
= &dbx_debug_hooks
;
2254 #if defined(XCOFF_DEBUGGING_INFO)
2255 if (write_symbols
== XCOFF_DEBUG
)
2256 debug_hooks
= &xcoff_debug_hooks
;
2258 #ifdef SDB_DEBUGGING_INFO
2259 if (write_symbols
== SDB_DEBUG
)
2260 debug_hooks
= &sdb_debug_hooks
;
2262 #ifdef DWARF_DEBUGGING_INFO
2263 if (write_symbols
== DWARF_DEBUG
)
2264 debug_hooks
= &dwarf_debug_hooks
;
2266 #ifdef DWARF2_DEBUGGING_INFO
2267 if (write_symbols
== DWARF2_DEBUG
)
2268 debug_hooks
= &dwarf2_debug_hooks
;
2271 if (! targetm
.have_named_sections
)
2273 if (flag_function_sections
)
2275 warning ("-ffunction-sections not supported for this target.");
2276 flag_function_sections
= 0;
2278 if (flag_data_sections
)
2280 warning ("-fdata-sections not supported for this target.");
2281 flag_data_sections
= 0;
2285 if (flag_function_sections
2286 && (profile_flag
|| profile_block_flag
))
2288 warning ("-ffunction-sections disabled; it makes profiling impossible.");
2289 flag_function_sections
= 0;
2292 #ifndef OBJECT_FORMAT_ELF
2293 if (flag_function_sections
&& write_symbols
!= NO_DEBUG
)
2294 warning ("-ffunction-sections may affect debugging on some targets.");
2297 /* If dbx symbol table desired, initialize writing it
2298 and output the predefined types. */
2299 timevar_push (TV_SYMOUT
);
2300 #ifdef DWARF2_UNWIND_INFO
2301 if (dwarf2out_do_frame ())
2302 dwarf2out_frame_init ();
2305 (*debug_hooks
->init
) (main_input_filename
);
2306 timevar_pop (TV_SYMOUT
);
2308 /* Initialize yet another pass. */
2310 init_final (main_input_filename
);
2311 init_branch_prob (dump_base_name
);
2313 timevar_push (TV_PARSE
);
2315 /* Call the parser, which parses the entire file
2316 (calling rest_of_compilation for each function). */
2318 if (yyparse () != 0)
2320 if (errorcount
== 0)
2321 fnotice (stderr
, "Errors detected in input file (your bison.simple is out of date)\n");
2323 /* In case there were missing closebraces,
2324 get us back to the global binding level. */
2325 while (! global_bindings_p ())
2329 /* Compilation is now finished except for writing
2330 what's left of the symbol table output. */
2332 timevar_pop (TV_PARSE
);
2334 if (flag_syntax_only
)
2337 globals
= getdecls ();
2339 /* Really define vars that have had only a tentative definition.
2340 Really output inline functions that must actually be callable
2341 and have not been output so far. */
2344 int len
= list_length (globals
);
2345 tree
*vec
= (tree
*) xmalloc (sizeof (tree
) * len
);
2349 /* Process the decls in reverse order--earliest first.
2350 Put them into VEC from back to front, then take out from front. */
2352 for (i
= 0, decl
= globals
; i
< len
; i
++, decl
= TREE_CHAIN (decl
))
2353 vec
[len
- i
- 1] = decl
;
2355 wrapup_global_declarations (vec
, len
);
2357 /* This must occur after the loop to output deferred functions. Else
2358 the profiler initializer would not be emitted if all the functions
2359 in this compilation unit were deferred.
2361 output_func_start_profiler can not cause any additional functions or
2362 data to need to be output, so it need not be in the deferred function
2364 output_func_start_profiler ();
2366 check_global_declarations (vec
, len
);
2372 /* Write out any pending weak symbol declarations. */
2376 /* Do dbx symbols. */
2377 timevar_push (TV_SYMOUT
);
2379 #ifdef DWARF2_UNWIND_INFO
2380 if (dwarf2out_do_frame ())
2381 dwarf2out_frame_finish ();
2384 (*debug_hooks
->finish
) (main_input_filename
);
2385 timevar_pop (TV_SYMOUT
);
2387 /* Output some stuff at end of file if nec. */
2389 dw2_output_indirect_constants ();
2391 end_final (dump_base_name
);
2393 if (profile_arc_flag
|| flag_test_coverage
|| flag_branch_probabilities
)
2395 timevar_push (TV_DUMP
);
2396 open_dump_file (DFI_bp
, NULL
);
2400 close_dump_file (DFI_bp
, NULL
, NULL_RTX
);
2401 timevar_pop (TV_DUMP
);
2405 ASM_FILE_END (asm_out_file
);
2408 /* Attach a special .ident directive to the end of the file to identify
2409 the version of GCC which compiled this code. The format of the .ident
2410 string is patterned after the ones produced by native SVR4 compilers. */
2413 fprintf (asm_out_file
, "%s\"GCC: (GNU) %s\"\n",
2414 IDENT_ASM_OP
, version_string
);
2417 /* Language-specific end of compilation actions. */
2419 if (lang_hooks
.finish
)
2420 (*lang_hooks
.finish
) ();
2422 /* Close the dump files. */
2424 if (flag_gen_aux_info
)
2426 fclose (aux_info_file
);
2428 unlink (aux_info_file_name
);
2431 if (optimize
> 0 && open_dump_file (DFI_combine
, NULL
))
2433 timevar_push (TV_DUMP
);
2434 dump_combine_total_stats (rtl_dump_file
);
2435 close_dump_file (DFI_combine
, NULL
, NULL_RTX
);
2436 timevar_pop (TV_DUMP
);
2439 /* Close non-debugging input and output files. Take special care to note
2440 whether fclose returns an error, since the pages might still be on the
2441 buffer chain while the file is open. */
2445 if (ferror (asm_out_file
) != 0)
2446 fatal_io_error ("error writing to %s", asm_file_name
);
2447 if (fclose (asm_out_file
) != 0)
2448 fatal_io_error ("error closing %s", asm_file_name
);
2450 /* Do whatever is necessary to finish printing the graphs. */
2451 if (graph_dump_format
!= no_graph
)
2455 for (i
= 0; i
< (int) DFI_MAX
; ++i
)
2456 if (dump_file
[i
].initialized
&& dump_file
[i
].graph_dump_p
)
2461 sprintf (seq
, ".%02d.", i
);
2462 suffix
= concat (seq
, dump_file
[i
].extension
, NULL
);
2463 finish_graph_dump_file (dump_base_name
, suffix
);
2470 ggc_print_statistics ();
2471 stringpool_statistics ();
2474 /* Free up memory for the benefit of leak detectors. */
2477 /* Stop timing total execution time. */
2478 timevar_stop (TV_TOTAL
);
2480 /* Print the times. */
2482 timevar_print (stderr
);
2485 /* This is called from various places for FUNCTION_DECL, VAR_DECL,
2486 and TYPE_DECL nodes.
2488 This does nothing for local (non-static) variables, unless the
2489 variable is a register variable with an ASMSPEC. In that case, or
2490 if the variable is not an automatic, it sets up the RTL and
2491 outputs any assembler code (label definition, storage allocation
2492 and initialization).
2494 DECL is the declaration. If ASMSPEC is nonzero, it specifies
2495 the assembler symbol name to be used. TOP_LEVEL is nonzero
2496 if this declaration is not within a function. */
2499 rest_of_decl_compilation (decl
, asmspec
, top_level
, at_end
)
2501 const char *asmspec
;
2505 /* Declarations of variables, and of functions defined elsewhere. */
2507 /* The most obvious approach, to put an #ifndef around where
2508 this macro is used, doesn't work since it's inside a macro call. */
2509 #ifndef ASM_FINISH_DECLARE_OBJECT
2510 #define ASM_FINISH_DECLARE_OBJECT(FILE, DECL, TOP, END)
2513 /* Forward declarations for nested functions are not "external",
2514 but we need to treat them as if they were. */
2515 if (TREE_STATIC (decl
) || DECL_EXTERNAL (decl
)
2516 || TREE_CODE (decl
) == FUNCTION_DECL
)
2518 timevar_push (TV_VARCONST
);
2520 make_decl_rtl (decl
, asmspec
);
2521 /* Don't output anything
2522 when a tentative file-scope definition is seen.
2523 But at end of compilation, do output code for them. */
2524 if (at_end
|| !DECL_DEFER_OUTPUT (decl
))
2525 assemble_variable (decl
, top_level
, at_end
, 0);
2526 if (decl
== last_assemble_variable_decl
)
2528 ASM_FINISH_DECLARE_OBJECT (asm_out_file
, decl
,
2531 timevar_pop (TV_VARCONST
);
2533 else if (DECL_REGISTER (decl
) && asmspec
!= 0)
2535 if (decode_reg_name (asmspec
) >= 0)
2537 SET_DECL_RTL (decl
, NULL_RTX
);
2538 make_decl_rtl (decl
, asmspec
);
2542 error ("invalid register name `%s' for register variable", asmspec
);
2543 DECL_REGISTER (decl
) = 0;
2548 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
2549 else if ((write_symbols
== DBX_DEBUG
|| write_symbols
== XCOFF_DEBUG
)
2550 && TREE_CODE (decl
) == TYPE_DECL
)
2552 timevar_push (TV_SYMOUT
);
2553 dbxout_symbol (decl
, 0);
2554 timevar_pop (TV_SYMOUT
);
2557 #ifdef SDB_DEBUGGING_INFO
2558 else if (write_symbols
== SDB_DEBUG
&& top_level
2559 && TREE_CODE (decl
) == TYPE_DECL
)
2561 timevar_push (TV_SYMOUT
);
2562 sdbout_symbol (decl
, 0);
2563 timevar_pop (TV_SYMOUT
);
2568 /* Called after finishing a record, union or enumeral type. */
2571 rest_of_type_compilation (type
, toplev
)
2572 #if defined(DBX_DEBUGGING_INFO) || defined(XCOFF_DEBUGGING_INFO) || defined (SDB_DEBUGGING_INFO)
2576 tree type ATTRIBUTE_UNUSED
;
2577 int toplev ATTRIBUTE_UNUSED
;
2580 timevar_push (TV_SYMOUT
);
2581 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
2582 if (write_symbols
== DBX_DEBUG
|| write_symbols
== XCOFF_DEBUG
)
2583 dbxout_symbol (TYPE_STUB_DECL (type
), !toplev
);
2585 #ifdef SDB_DEBUGGING_INFO
2586 if (write_symbols
== SDB_DEBUG
)
2587 sdbout_symbol (TYPE_STUB_DECL (type
), !toplev
);
2589 #ifdef DWARF2_DEBUGGING_INFO
2590 if (write_symbols
== DWARF2_DEBUG
&& toplev
)
2591 dwarf2out_decl (TYPE_STUB_DECL (type
));
2593 timevar_pop (TV_SYMOUT
);
2596 /* This is called from finish_function (within yyparse)
2597 after each top-level definition is parsed.
2598 It is supposed to compile that function or variable
2599 and output the assembler code for it.
2600 After we return, the tree storage is freed. */
2603 rest_of_compilation (decl
)
2609 int rebuild_label_notes_after_reload
;
2610 int register_life_up_to_date
;
2612 timevar_push (TV_REST_OF_COMPILATION
);
2614 /* Now that we're out of the frontend, we shouldn't have any more
2615 CONCATs anywhere. */
2616 generating_concat_p
= 0;
2618 /* When processing delayed functions, prepare_function_start() won't
2619 have been run to re-initialize it. */
2620 cse_not_expected
= ! optimize
;
2622 /* First, make sure that NOTE_BLOCK is set correctly for each
2623 NOTE_INSN_BLOCK_BEG/NOTE_INSN_BLOCK_END note. */
2624 if (!cfun
->x_whole_function_mode_p
)
2627 /* Then remove any notes we don't need. That will make iterating
2628 over the instruction sequence faster, and allow the garbage
2629 collector to reclaim the memory used by the notes. */
2630 remove_unnecessary_notes ();
2632 /* In function-at-a-time mode, we do not attempt to keep the BLOCK
2633 tree in sensible shape. So, we just recalculate it here. */
2634 if (cfun
->x_whole_function_mode_p
)
2639 /* If we are reconsidering an inline function
2640 at the end of compilation, skip the stuff for making it inline. */
2642 if (DECL_SAVED_INSNS (decl
) == 0)
2648 /* If this is nested inside an inlined external function, pretend
2649 it was only declared. Since we cannot inline such functions,
2650 generating code for this one is not only not necessary but will
2651 confuse some debugging output writers. */
2652 for (parent
= DECL_CONTEXT (current_function_decl
);
2653 parent
!= NULL_TREE
;
2654 parent
= get_containing_scope (parent
))
2655 if (TREE_CODE (parent
) == FUNCTION_DECL
2656 && DECL_INLINE (parent
) && DECL_EXTERNAL (parent
))
2658 DECL_INITIAL (decl
) = 0;
2659 goto exit_rest_of_compilation
;
2662 /* If requested, consider whether to make this function inline. */
2663 if ((DECL_INLINE (decl
) && !flag_no_inline
)
2664 || flag_inline_functions
)
2666 timevar_push (TV_INTEGRATION
);
2667 lose
= function_cannot_inline_p (decl
);
2668 timevar_pop (TV_INTEGRATION
);
2669 if (lose
|| ! optimize
)
2671 if (warn_inline
&& DECL_INLINE (decl
))
2672 warning_with_decl (decl
, lose
);
2673 DECL_ABSTRACT_ORIGIN (decl
) = 0;
2674 /* Don't really compile an extern inline function.
2675 If we can't make it inline, pretend
2676 it was only declared. */
2677 if (DECL_EXTERNAL (decl
))
2679 DECL_INITIAL (decl
) = 0;
2680 goto exit_rest_of_compilation
;
2684 /* ??? Note that this has the effect of making it look
2685 like "inline" was specified for a function if we choose
2686 to inline it. This isn't quite right, but it's
2687 probably not worth the trouble to fix. */
2688 inlinable
= DECL_INLINE (decl
) = 1;
2691 insns
= get_insns ();
2693 /* Dump the rtl code if we are dumping rtl. */
2695 if (open_dump_file (DFI_rtl
, decl
))
2697 if (DECL_SAVED_INSNS (decl
))
2698 fprintf (rtl_dump_file
, ";; (integrable)\n\n");
2699 close_dump_file (DFI_rtl
, print_rtl
, insns
);
2702 /* Convert from NOTE_INSN_EH_REGION style notes, and do other
2703 sorts of eh initialization. Delay this until after the
2704 initial rtl dump so that we can see the original nesting. */
2705 convert_from_eh_region_ranges ();
2707 /* If function is inline, and we don't yet know whether to
2708 compile it by itself, defer decision till end of compilation.
2709 finish_compilation will call rest_of_compilation again
2710 for those functions that need to be output. Also defer those
2711 functions that we are supposed to defer. */
2714 || (DECL_INLINE (decl
)
2715 && ((! TREE_PUBLIC (decl
) && ! TREE_ADDRESSABLE (decl
)
2716 && ! flag_keep_inline_functions
)
2717 || DECL_EXTERNAL (decl
))))
2718 DECL_DEFER_OUTPUT (decl
) = 1;
2720 if (DECL_INLINE (decl
))
2721 /* DWARF wants seperate debugging info for abstract and
2722 concrete instances of all inline functions, including those
2723 declared inline but not inlined, and those inlined even
2724 though they weren't declared inline. Conveniently, that's
2725 what DECL_INLINE means at this point. */
2726 (*debug_hooks
->deferred_inline_function
) (decl
);
2728 if (DECL_DEFER_OUTPUT (decl
))
2730 /* If -Wreturn-type, we have to do a bit of compilation. We just
2731 want to call cleanup the cfg to figure out whether or not we can
2732 fall off the end of the function; we do the minimum amount of
2733 work necessary to make that safe. */
2734 if (warn_return_type
)
2736 int saved_optimize
= optimize
;
2739 rebuild_jump_labels (insns
);
2740 find_exception_handler_labels ();
2741 find_basic_blocks (insns
, max_reg_num (), rtl_dump_file
);
2742 cleanup_cfg (CLEANUP_PRE_SIBCALL
| CLEANUP_PRE_LOOP
);
2743 optimize
= saved_optimize
;
2746 current_function_nothrow
= nothrow_function_p ();
2747 if (current_function_nothrow
)
2748 /* Now we know that this can't throw; set the flag for the benefit
2749 of other functions later in this translation unit. */
2750 TREE_NOTHROW (current_function_decl
) = 1;
2752 timevar_push (TV_INTEGRATION
);
2753 save_for_inline (decl
);
2754 timevar_pop (TV_INTEGRATION
);
2755 DECL_SAVED_INSNS (decl
)->inlinable
= inlinable
;
2756 goto exit_rest_of_compilation
;
2759 /* If specified extern inline but we aren't inlining it, we are
2760 done. This goes for anything that gets here with DECL_EXTERNAL
2761 set, not just things with DECL_INLINE. */
2762 if (DECL_EXTERNAL (decl
))
2763 goto exit_rest_of_compilation
;
2768 /* Initialize some variables used by the optimizers. */
2769 init_function_for_compilation ();
2771 if (! DECL_DEFER_OUTPUT (decl
))
2772 TREE_ASM_WRITTEN (decl
) = 1;
2774 /* Now that integrate will no longer see our rtl, we need not
2775 distinguish between the return value of this function and the
2776 return value of called functions. Also, we can remove all SETs
2777 of subregs of hard registers; they are only here because of
2778 integrate. Also, we can now initialize pseudos intended to
2779 carry magic hard reg data throughout the function. */
2780 rtx_equal_function_value_matters
= 0;
2781 purge_hard_subreg_sets (get_insns ());
2782 emit_initial_value_sets ();
2784 /* Don't return yet if -Wreturn-type; we need to do cleanup_cfg. */
2785 if ((rtl_dump_and_exit
|| flag_syntax_only
) && !warn_return_type
)
2786 goto exit_rest_of_compilation
;
2788 /* We may have potential sibling or tail recursion sites. Select one
2789 (of possibly multiple) methods of performing the call. */
2790 if (flag_optimize_sibling_calls
)
2792 timevar_push (TV_JUMP
);
2793 open_dump_file (DFI_sibling
, decl
);
2795 optimize_sibling_and_tail_recursive_calls ();
2797 close_dump_file (DFI_sibling
, print_rtl
, get_insns ());
2798 timevar_pop (TV_JUMP
);
2801 /* Complete generation of exception handling code. */
2802 find_exception_handler_labels ();
2805 timevar_push (TV_JUMP
);
2806 open_dump_file (DFI_eh
, decl
);
2808 finish_eh_generation ();
2810 close_dump_file (DFI_eh
, print_rtl
, get_insns ());
2811 timevar_pop (TV_JUMP
);
2815 /* If we are doing position-independent code generation, now
2816 is the time to output special prologues and epilogues.
2817 We do not want to do this earlier, because it just clutters
2818 up inline functions with meaningless insns. */
2823 insns
= get_insns ();
2825 /* Copy any shared structure that should not be shared. */
2826 unshare_all_rtl (current_function_decl
, insns
);
2828 #ifdef SETJMP_VIA_SAVE_AREA
2829 /* This must be performed before virutal register instantiation. */
2830 if (current_function_calls_alloca
)
2831 optimize_save_area_alloca (insns
);
2834 /* Instantiate all virtual registers. */
2835 instantiate_virtual_regs (current_function_decl
, insns
);
2837 open_dump_file (DFI_jump
, decl
);
2839 /* Always do one jump optimization pass to ensure that JUMP_LABEL fields
2840 are initialized and to compute whether control can drop off the end
2843 timevar_push (TV_JUMP
);
2844 /* Turn NOTE_INSN_EXPECTED_VALUE into REG_BR_PROB. Do this
2845 before jump optimization switches branch directions. */
2846 expected_value_to_br_prob ();
2848 reg_scan (insns
, max_reg_num (), 0);
2849 rebuild_jump_labels (insns
);
2850 find_basic_blocks (insns
, max_reg_num (), rtl_dump_file
);
2851 cleanup_cfg ((optimize
? CLEANUP_EXPENSIVE
: 0) | CLEANUP_PRE_LOOP
);
2852 copy_loop_headers (insns
);
2853 purge_line_number_notes (insns
);
2855 timevar_pop (TV_JUMP
);
2857 /* Now is when we stop if -fsyntax-only and -Wreturn-type. */
2858 if (rtl_dump_and_exit
|| flag_syntax_only
|| DECL_DEFER_OUTPUT (decl
))
2860 close_dump_file (DFI_jump
, print_rtl
, insns
);
2861 goto exit_rest_of_compilation
;
2864 /* Long term, this should probably move before the jump optimizer too,
2865 but I didn't want to disturb the rtl_dump_and_exit and related
2866 stuff at this time. */
2867 if (optimize
> 0 && flag_ssa
)
2869 /* Convert to SSA form. */
2871 timevar_push (TV_TO_SSA
);
2872 open_dump_file (DFI_ssa
, decl
);
2874 find_basic_blocks (insns
, max_reg_num (), rtl_dump_file
);
2875 cleanup_cfg (CLEANUP_EXPENSIVE
| CLEANUP_PRE_LOOP
);
2878 close_dump_file (DFI_ssa
, print_rtl_with_bb
, insns
);
2879 timevar_pop (TV_TO_SSA
);
2881 /* Perform sparse conditional constant propagation, if requested. */
2884 timevar_push (TV_SSA_CCP
);
2885 open_dump_file (DFI_ssa_ccp
, decl
);
2889 close_dump_file (DFI_ssa_ccp
, print_rtl_with_bb
, get_insns ());
2890 timevar_pop (TV_SSA_CCP
);
2893 /* It would be useful to cleanup the CFG at this point, but block
2894 merging and possibly other transformations might leave a PHI
2895 node in the middle of a basic block, which is a strict no-no. */
2897 /* The SSA implementation uses basic block numbers in its phi
2898 nodes. Thus, changing the control-flow graph or the basic
2899 blocks, e.g., calling find_basic_blocks () or cleanup_cfg (),
2900 may cause problems. */
2904 /* Remove dead code. */
2906 timevar_push (TV_SSA_DCE
);
2907 open_dump_file (DFI_ssa_dce
, decl
);
2909 insns
= get_insns ();
2910 ssa_eliminate_dead_code();
2912 close_dump_file (DFI_ssa_dce
, print_rtl_with_bb
, insns
);
2913 timevar_pop (TV_SSA_DCE
);
2916 /* Convert from SSA form. */
2918 timevar_push (TV_FROM_SSA
);
2919 open_dump_file (DFI_ussa
, decl
);
2921 convert_from_ssa ();
2922 /* New registers have been created. Rescan their usage. */
2923 reg_scan (insns
, max_reg_num (), 1);
2924 /* Life analysis used in SSA adds log_links but these
2925 shouldn't be there until the flow stage, so clear
2927 clear_log_links (insns
);
2929 close_dump_file (DFI_ussa
, print_rtl_with_bb
, insns
);
2930 timevar_pop (TV_FROM_SSA
);
2935 timevar_push (TV_JUMP
);
2939 find_basic_blocks (insns
, max_reg_num (), rtl_dump_file
);
2940 cleanup_cfg (CLEANUP_EXPENSIVE
| CLEANUP_PRE_LOOP
);
2942 /* ??? Run if-conversion before delete_null_pointer_checks,
2943 since the later does not preserve the CFG. This should
2944 be changed -- no since converting if's that are going to
2946 timevar_push (TV_IFCVT
);
2948 timevar_pop (TV_IFCVT
);
2950 /* Try to identify useless null pointer tests and delete them. */
2951 if (flag_delete_null_pointer_checks
)
2952 delete_null_pointer_checks (insns
);
2955 /* Jump optimization, and the removal of NULL pointer checks, may
2956 have reduced the number of instructions substantially. CSE, and
2957 future passes, allocate arrays whose dimensions involve the
2958 maximum instruction UID, so if we can reduce the maximum UID
2959 we'll save big on memory. */
2960 renumber_insns (rtl_dump_file
);
2961 timevar_pop (TV_JUMP
);
2963 close_dump_file (DFI_jump
, print_rtl
, insns
);
2967 /* Perform common subexpression elimination.
2968 Nonzero value from `cse_main' means that jumps were simplified
2969 and some code may now be unreachable, so do
2970 jump optimization again. */
2974 open_dump_file (DFI_cse
, decl
);
2975 timevar_push (TV_CSE
);
2977 reg_scan (insns
, max_reg_num (), 1);
2979 if (flag_thread_jumps
)
2981 timevar_push (TV_JUMP
);
2982 thread_jumps (insns
, max_reg_num (), 1);
2983 timevar_pop (TV_JUMP
);
2986 tem
= cse_main (insns
, max_reg_num (), 0, rtl_dump_file
);
2988 /* If we are not running more CSE passes, then we are no longer
2989 expecting CSE to be run. But always rerun it in a cheap mode. */
2990 cse_not_expected
= !flag_rerun_cse_after_loop
&& !flag_gcse
;
2992 if (tem
|| optimize
> 1)
2994 timevar_push (TV_JUMP
);
2995 rebuild_jump_labels (insns
);
2996 find_basic_blocks (insns
, max_reg_num (), rtl_dump_file
);
2997 cleanup_cfg (CLEANUP_EXPENSIVE
| CLEANUP_PRE_LOOP
);
2998 timevar_pop (TV_JUMP
);
3001 /* Run this after jump optmizations remove all the unreachable code
3002 so that unreachable code will not keep values live. */
3003 delete_trivially_dead_insns (insns
, max_reg_num (), 0);
3005 /* Try to identify useless null pointer tests and delete them. */
3006 if (flag_delete_null_pointer_checks
)
3008 timevar_push (TV_JUMP
);
3009 find_basic_blocks (insns
, max_reg_num (), rtl_dump_file
);
3011 cleanup_cfg (CLEANUP_EXPENSIVE
| CLEANUP_PRE_LOOP
);
3013 delete_null_pointer_checks (insns
);
3014 timevar_pop (TV_JUMP
);
3017 /* The second pass of jump optimization is likely to have
3018 removed a bunch more instructions. */
3019 renumber_insns (rtl_dump_file
);
3021 timevar_pop (TV_CSE
);
3022 close_dump_file (DFI_cse
, print_rtl
, insns
);
3025 open_dump_file (DFI_addressof
, decl
);
3027 purge_addressof (insns
);
3028 reg_scan (insns
, max_reg_num (), 1);
3030 close_dump_file (DFI_addressof
, print_rtl
, insns
);
3034 /* Perform global cse. */
3036 if (optimize
> 0 && flag_gcse
)
3038 int save_csb
, save_cfj
;
3041 timevar_push (TV_GCSE
);
3042 open_dump_file (DFI_gcse
, decl
);
3044 find_basic_blocks (insns
, max_reg_num (), rtl_dump_file
);
3045 cleanup_cfg (CLEANUP_EXPENSIVE
| CLEANUP_PRE_LOOP
);
3046 tem
= gcse_main (insns
, rtl_dump_file
);
3048 save_csb
= flag_cse_skip_blocks
;
3049 save_cfj
= flag_cse_follow_jumps
;
3050 flag_cse_skip_blocks
= flag_cse_follow_jumps
= 0;
3052 /* If -fexpensive-optimizations, re-run CSE to clean up things done
3054 if (flag_expensive_optimizations
)
3056 timevar_push (TV_CSE
);
3057 reg_scan (insns
, max_reg_num (), 1);
3058 tem2
= cse_main (insns
, max_reg_num (), 0, rtl_dump_file
);
3059 timevar_pop (TV_CSE
);
3060 cse_not_expected
= !flag_rerun_cse_after_loop
;
3063 /* If gcse or cse altered any jumps, rerun jump optimizations to clean
3064 things up. Then possibly re-run CSE again. */
3068 timevar_push (TV_JUMP
);
3069 rebuild_jump_labels (insns
);
3070 delete_trivially_dead_insns (insns
, max_reg_num (), 0);
3071 find_basic_blocks (insns
, max_reg_num (), rtl_dump_file
);
3072 cleanup_cfg (CLEANUP_EXPENSIVE
| CLEANUP_PRE_LOOP
);
3073 timevar_pop (TV_JUMP
);
3075 if (flag_expensive_optimizations
)
3077 timevar_push (TV_CSE
);
3078 reg_scan (insns
, max_reg_num (), 1);
3079 tem2
= cse_main (insns
, max_reg_num (), 0, rtl_dump_file
);
3080 timevar_pop (TV_CSE
);
3084 close_dump_file (DFI_gcse
, print_rtl
, insns
);
3085 timevar_pop (TV_GCSE
);
3088 flag_cse_skip_blocks
= save_csb
;
3089 flag_cse_follow_jumps
= save_cfj
;
3092 /* Move constant computations out of loops. */
3096 timevar_push (TV_LOOP
);
3097 open_dump_file (DFI_loop
, decl
);
3099 if (flag_rerun_loop_opt
)
3101 cleanup_barriers ();
3103 /* We only want to perform unrolling once. */
3105 loop_optimize (insns
, rtl_dump_file
, 0);
3107 /* The first call to loop_optimize makes some instructions
3108 trivially dead. We delete those instructions now in the
3109 hope that doing so will make the heuristics in loop work
3110 better and possibly speed up compilation. */
3111 delete_trivially_dead_insns (insns
, max_reg_num (), 0);
3113 /* The regscan pass is currently necessary as the alias
3114 analysis code depends on this information. */
3115 reg_scan (insns
, max_reg_num (), 1);
3117 cleanup_barriers ();
3118 loop_optimize (insns
, rtl_dump_file
,
3119 (flag_unroll_loops
? LOOP_UNROLL
: 0) | LOOP_BCT
);
3121 close_dump_file (DFI_loop
, print_rtl
, insns
);
3122 timevar_pop (TV_LOOP
);
3129 timevar_push (TV_CSE2
);
3130 open_dump_file (DFI_cse2
, decl
);
3132 if (flag_rerun_cse_after_loop
)
3134 /* Running another jump optimization pass before the second
3135 cse pass sometimes simplifies the RTL enough to allow
3136 the second CSE pass to do a better job. Jump_optimize can change
3137 max_reg_num so we must rerun reg_scan afterwards.
3138 ??? Rework to not call reg_scan so often. */
3139 timevar_push (TV_JUMP
);
3141 /* The previous call to loop_optimize makes some instructions
3142 trivially dead. We delete those instructions now in the
3143 hope that doing so will make the heuristics in jump work
3144 better and possibly speed up compilation. */
3145 delete_trivially_dead_insns (insns
, max_reg_num (), 0);
3147 reg_scan (insns
, max_reg_num (), 0);
3149 timevar_push (TV_IFCVT
);
3151 find_basic_blocks (insns
, max_reg_num (), rtl_dump_file
);
3152 cleanup_cfg (CLEANUP_EXPENSIVE
);
3155 timevar_pop(TV_IFCVT
);
3157 timevar_pop (TV_JUMP
);
3159 reg_scan (insns
, max_reg_num (), 0);
3160 tem
= cse_main (insns
, max_reg_num (), 1, rtl_dump_file
);
3164 timevar_push (TV_JUMP
);
3165 rebuild_jump_labels (insns
);
3166 find_basic_blocks (insns
, max_reg_num (), rtl_dump_file
);
3167 cleanup_cfg (CLEANUP_EXPENSIVE
);
3168 timevar_pop (TV_JUMP
);
3172 if (flag_thread_jumps
)
3174 /* This pass of jump threading straightens out code
3175 that was kinked by loop optimization. */
3176 timevar_push (TV_JUMP
);
3177 reg_scan (insns
, max_reg_num (), 0);
3178 thread_jumps (insns
, max_reg_num (), 0);
3179 timevar_pop (TV_JUMP
);
3182 close_dump_file (DFI_cse2
, print_rtl
, insns
);
3183 timevar_pop (TV_CSE2
);
3188 cse_not_expected
= 1;
3192 /* Do control and data flow analysis; wrote some of the results to
3195 timevar_push (TV_FLOW
);
3196 open_dump_file (DFI_cfg
, decl
);
3198 find_basic_blocks (insns
, max_reg_num (), rtl_dump_file
);
3199 cleanup_cfg (optimize
? CLEANUP_EXPENSIVE
: 0);
3200 check_function_return_warnings ();
3202 /* It may make more sense to mark constant functions after dead code is
3203 eliminated by life_analyzis, but we need to do it early, as -fprofile-arcs
3204 may insert code making function non-constant, but we still must consider
3205 it as constant, otherwise -fbranch-probabilities will not read data back.
3207 life_analyzis rarely eliminates modification of external memory.
3209 mark_constant_function ();
3211 close_dump_file (DFI_cfg
, print_rtl_with_bb
, insns
);
3213 if (profile_arc_flag
|| flag_test_coverage
|| flag_branch_probabilities
)
3215 timevar_push (TV_BRANCH_PROB
);
3216 open_dump_file (DFI_bp
, decl
);
3220 close_dump_file (DFI_bp
, print_rtl_with_bb
, insns
);
3221 timevar_pop (TV_BRANCH_PROB
);
3224 open_dump_file (DFI_life
, decl
);
3229 /* Discover and record the loop depth at the head of each basic
3230 block. The loop infrastructure does the real job for us. */
3231 flow_loops_find (&loops
, LOOP_TREE
);
3233 /* Estimate using heuristics if no profiling info is available. */
3234 if (flag_guess_branch_prob
)
3235 estimate_probability (&loops
);
3238 flow_loops_dump (&loops
, rtl_dump_file
, NULL
, 0);
3240 flow_loops_free (&loops
);
3242 life_analysis (insns
, rtl_dump_file
, PROP_FINAL
);
3243 timevar_pop (TV_FLOW
);
3247 if (warn_uninitialized
|| extra_warnings
)
3249 uninitialized_vars_warning (DECL_INITIAL (decl
));
3251 setjmp_args_warning ();
3254 close_dump_file (DFI_life
, print_rtl_with_bb
, insns
);
3258 /* If -opt, try combining insns through substitution. */
3262 int rebuild_jump_labels_after_combine
= 0;
3264 timevar_push (TV_COMBINE
);
3265 open_dump_file (DFI_combine
, decl
);
3267 rebuild_jump_labels_after_combine
3268 = combine_instructions (insns
, max_reg_num ());
3270 /* Always purge dead edges, as we may eliminate an insn throwing
3272 rebuild_jump_labels_after_combine
|= purge_all_dead_edges ();
3274 /* Combining insns may have turned an indirect jump into a
3275 direct jump. Rebuid the JUMP_LABEL fields of jumping
3277 if (rebuild_jump_labels_after_combine
)
3279 timevar_push (TV_JUMP
);
3280 rebuild_jump_labels (insns
);
3281 timevar_pop (TV_JUMP
);
3283 timevar_push (TV_FLOW
);
3284 cleanup_cfg (CLEANUP_EXPENSIVE
);
3286 /* Blimey. We've got to have the CFG up to date for the call to
3287 if_convert below. However, the random deletion of blocks
3288 without updating life info can wind up with Wierd Stuff in
3289 global_live_at_end. We then run sched1, which updates things
3290 properly, discovers the wierdness and aborts. */
3291 allocate_bb_life_data ();
3292 update_life_info (NULL
, UPDATE_LIFE_GLOBAL_RM_NOTES
,
3293 PROP_DEATH_NOTES
| PROP_KILL_DEAD_CODE
3294 | PROP_SCAN_DEAD_CODE
);
3296 timevar_pop (TV_FLOW
);
3299 close_dump_file (DFI_combine
, print_rtl_with_bb
, insns
);
3300 timevar_pop (TV_COMBINE
);
3305 /* Rerun if-conversion, as combine may have simplified things enough to
3306 now meet sequence length restrictions. */
3309 timevar_push (TV_IFCVT
);
3310 open_dump_file (DFI_ce
, decl
);
3316 close_dump_file (DFI_ce
, print_rtl_with_bb
, insns
);
3317 timevar_pop (TV_IFCVT
);
3320 /* Register allocation pre-pass, to reduce number of moves
3321 necessary for two-address machines. */
3322 if (optimize
> 0 && (flag_regmove
|| flag_expensive_optimizations
))
3324 timevar_push (TV_REGMOVE
);
3325 open_dump_file (DFI_regmove
, decl
);
3327 regmove_optimize (insns
, max_reg_num (), rtl_dump_file
);
3329 close_dump_file (DFI_regmove
, print_rtl_with_bb
, insns
);
3330 timevar_pop (TV_REGMOVE
);
3335 /* Do unconditional splitting before register allocation to allow machine
3336 description to add extra information not needed previously. */
3337 split_all_insns (1);
3339 /* Any of the several passes since flow1 will have munged register
3340 lifetime data a bit. */
3341 register_life_up_to_date
= 0;
3343 #ifdef OPTIMIZE_MODE_SWITCHING
3344 timevar_push (TV_GCSE
);
3347 if (optimize_mode_switching (NULL
))
3349 /* We did work, and so had to regenerate global life information.
3350 Take advantage of this and don't re-recompute register life
3351 information below. */
3352 register_life_up_to_date
= 1;
3356 timevar_pop (TV_GCSE
);
3359 timevar_push (TV_SCHED
);
3361 #ifdef INSN_SCHEDULING
3363 /* Print function header into sched dump now
3364 because doing the sched analysis makes some of the dump. */
3365 if (optimize
> 0 && flag_schedule_insns
)
3367 open_dump_file (DFI_sched
, decl
);
3369 /* Do control and data sched analysis,
3370 and write some of the results to dump file. */
3372 schedule_insns (rtl_dump_file
);
3374 close_dump_file (DFI_sched
, print_rtl_with_bb
, insns
);
3376 /* Register lifetime information was updated as part of verifying
3378 register_life_up_to_date
= 1;
3381 timevar_pop (TV_SCHED
);
3385 /* Determine if the current function is a leaf before running reload
3386 since this can impact optimizations done by the prologue and
3387 epilogue thus changing register elimination offsets. */
3388 current_function_is_leaf
= leaf_function_p ();
3390 timevar_push (TV_LOCAL_ALLOC
);
3391 open_dump_file (DFI_lreg
, decl
);
3393 /* Allocate pseudo-regs that are used only within 1 basic block.
3395 RUN_JUMP_AFTER_RELOAD records whether or not we need to rerun the
3396 jump optimizer after register allocation and reloading are finished. */
3398 if (! register_life_up_to_date
)
3399 recompute_reg_usage (insns
, ! optimize_size
);
3400 regclass (insns
, max_reg_num (), rtl_dump_file
);
3401 rebuild_label_notes_after_reload
= local_alloc ();
3403 timevar_pop (TV_LOCAL_ALLOC
);
3405 if (dump_file
[DFI_lreg
].enabled
)
3407 timevar_push (TV_DUMP
);
3409 dump_flow_info (rtl_dump_file
);
3410 dump_local_alloc (rtl_dump_file
);
3412 close_dump_file (DFI_lreg
, print_rtl_with_bb
, insns
);
3413 timevar_pop (TV_DUMP
);
3418 timevar_push (TV_GLOBAL_ALLOC
);
3419 open_dump_file (DFI_greg
, decl
);
3421 /* If optimizing, allocate remaining pseudo-regs. Do the reload
3422 pass fixing up any insns that are invalid. */
3425 failure
= global_alloc (rtl_dump_file
);
3428 build_insn_chain (insns
);
3429 failure
= reload (insns
, 0);
3432 timevar_pop (TV_GLOBAL_ALLOC
);
3434 if (dump_file
[DFI_greg
].enabled
)
3436 timevar_push (TV_DUMP
);
3438 dump_global_regs (rtl_dump_file
);
3440 close_dump_file (DFI_greg
, print_rtl_with_bb
, insns
);
3441 timevar_pop (TV_DUMP
);
3445 goto exit_rest_of_compilation
;
3449 open_dump_file (DFI_postreload
, decl
);
3451 /* Do a very simple CSE pass over just the hard registers. */
3454 timevar_push (TV_RELOAD_CSE_REGS
);
3455 reload_cse_regs (insns
);
3456 timevar_pop (TV_RELOAD_CSE_REGS
);
3459 /* Register allocation and reloading may have turned an indirect jump into
3460 a direct jump. If so, we must rebuild the JUMP_LABEL fields of
3461 jumping instructions. */
3462 if (rebuild_label_notes_after_reload
)
3464 timevar_push (TV_JUMP
);
3466 rebuild_jump_labels (insns
);
3468 timevar_pop (TV_JUMP
);
3471 close_dump_file (DFI_postreload
, print_rtl_with_bb
, insns
);
3473 /* Re-create the death notes which were deleted during reload. */
3474 timevar_push (TV_FLOW2
);
3475 open_dump_file (DFI_flow2
, decl
);
3477 #ifdef ENABLE_CHECKING
3478 verify_flow_info ();
3481 compute_bb_for_insn (get_max_uid ());
3483 /* If optimizing, then go ahead and split insns now. */
3485 split_all_insns (0);
3487 cleanup_cfg (optimize
? CLEANUP_EXPENSIVE
: 0);
3489 /* On some machines, the prologue and epilogue code, or parts thereof,
3490 can be represented as RTL. Doing so lets us schedule insns between
3491 it and the rest of the code and also allows delayed branch
3492 scheduling to operate in the epilogue. */
3493 thread_prologue_and_epilogue_insns (insns
);
3497 cleanup_cfg (CLEANUP_EXPENSIVE
| CLEANUP_CROSSJUMP
);
3498 life_analysis (insns
, rtl_dump_file
, PROP_FINAL
);
3500 /* This is kind of a heuristic. We need to run combine_stack_adjustments
3501 even for machines with possibly nonzero RETURN_POPS_ARGS
3502 and ACCUMULATE_OUTGOING_ARGS. We expect that only ports having
3503 push instructions will have popping returns. */
3504 #ifndef PUSH_ROUNDING
3505 if (!ACCUMULATE_OUTGOING_ARGS
)
3507 combine_stack_adjustments ();
3512 flow2_completed
= 1;
3514 close_dump_file (DFI_flow2
, print_rtl_with_bb
, insns
);
3515 timevar_pop (TV_FLOW2
);
3517 #ifdef HAVE_peephole2
3518 if (optimize
> 0 && flag_peephole2
)
3520 timevar_push (TV_PEEPHOLE2
);
3521 open_dump_file (DFI_peephole2
, decl
);
3523 peephole2_optimize (rtl_dump_file
);
3525 close_dump_file (DFI_peephole2
, print_rtl_with_bb
, insns
);
3526 timevar_pop (TV_PEEPHOLE2
);
3530 if (optimize
> 0 && flag_rename_registers
)
3532 timevar_push (TV_RENAME_REGISTERS
);
3533 open_dump_file (DFI_rnreg
, decl
);
3535 regrename_optimize ();
3537 close_dump_file (DFI_rnreg
, print_rtl_with_bb
, insns
);
3538 timevar_pop (TV_RENAME_REGISTERS
);
3543 timevar_push (TV_IFCVT2
);
3544 open_dump_file (DFI_ce2
, decl
);
3548 close_dump_file (DFI_ce2
, print_rtl_with_bb
, insns
);
3549 timevar_pop (TV_IFCVT2
);
3553 split_all_insns (1);
3556 #ifdef INSN_SCHEDULING
3557 if (optimize
> 0 && flag_schedule_insns_after_reload
)
3559 timevar_push (TV_SCHED2
);
3560 open_dump_file (DFI_sched2
, decl
);
3562 /* Do control and data sched analysis again,
3563 and write some more of the results to dump file. */
3565 split_all_insns (1);
3567 schedule_insns (rtl_dump_file
);
3569 close_dump_file (DFI_sched2
, print_rtl_with_bb
, insns
);
3570 timevar_pop (TV_SCHED2
);
3576 #ifdef LEAF_REGISTERS
3577 current_function_uses_only_leaf_regs
3578 = optimize
> 0 && only_leaf_regs_used () && leaf_function_p ();
3582 timevar_push (TV_REG_STACK
);
3583 open_dump_file (DFI_stack
, decl
);
3585 reg_to_stack (insns
, rtl_dump_file
);
3587 close_dump_file (DFI_stack
, print_rtl
, insns
);
3588 timevar_pop (TV_REG_STACK
);
3594 timevar_push (TV_REORDER_BLOCKS
);
3595 open_dump_file (DFI_bbro
, decl
);
3597 /* Last attempt to optimize CFG, as life analyzis possibly removed
3598 some instructions. */
3599 cleanup_cfg (CLEANUP_EXPENSIVE
| CLEANUP_POST_REGSTACK
3600 | CLEANUP_CROSSJUMP
);
3601 if (flag_reorder_blocks
)
3603 reorder_basic_blocks ();
3604 cleanup_cfg (CLEANUP_EXPENSIVE
| CLEANUP_POST_REGSTACK
);
3607 close_dump_file (DFI_bbro
, print_rtl_with_bb
, insns
);
3608 timevar_pop (TV_REORDER_BLOCKS
);
3611 /* If a machine dependent reorganization is needed, call it. */
3612 #ifdef MACHINE_DEPENDENT_REORG
3613 open_dump_file (DFI_mach
, decl
);
3615 MACHINE_DEPENDENT_REORG (insns
);
3617 close_dump_file (DFI_mach
, print_rtl
, insns
);
3622 /* CFG no longer kept up to date. */
3624 purge_line_number_notes (insns
);
3625 cleanup_barriers ();
3627 /* If a scheduling pass for delayed branches is to be done,
3628 call the scheduling code. */
3631 if (optimize
> 0 && flag_delayed_branch
)
3633 timevar_push (TV_DBR_SCHED
);
3634 open_dump_file (DFI_dbr
, decl
);
3636 dbr_schedule (insns
, rtl_dump_file
);
3638 close_dump_file (DFI_dbr
, print_rtl
, insns
);
3639 timevar_pop (TV_DBR_SCHED
);
3645 #if defined (HAVE_ATTR_length) && !defined (STACK_REGS)
3646 timevar_push (TV_SHORTEN_BRANCH
);
3647 split_all_insns_noflow ();
3648 timevar_pop (TV_SHORTEN_BRANCH
);
3651 convert_to_eh_region_ranges ();
3653 /* Shorten branches. */
3654 timevar_push (TV_SHORTEN_BRANCH
);
3655 shorten_branches (get_insns ());
3656 timevar_pop (TV_SHORTEN_BRANCH
);
3658 current_function_nothrow
= nothrow_function_p ();
3659 if (current_function_nothrow
)
3660 /* Now we know that this can't throw; set the flag for the benefit
3661 of other functions later in this translation unit. */
3662 TREE_NOTHROW (current_function_decl
) = 1;
3664 /* Now turn the rtl into assembler code. */
3666 timevar_push (TV_FINAL
);
3671 /* Get the function's name, as described by its RTL. This may be
3672 different from the DECL_NAME name used in the source file. */
3674 x
= DECL_RTL (decl
);
3675 if (GET_CODE (x
) != MEM
)
3678 if (GET_CODE (x
) != SYMBOL_REF
)
3680 fnname
= XSTR (x
, 0);
3682 assemble_start_function (decl
, fnname
);
3683 final_start_function (insns
, asm_out_file
, optimize
);
3684 final (insns
, asm_out_file
, optimize
, 0);
3685 final_end_function ();
3687 #ifdef IA64_UNWIND_INFO
3688 /* ??? The IA-64 ".handlerdata" directive must be issued before
3689 the ".endp" directive that closes the procedure descriptor. */
3690 output_function_exception_table ();
3693 assemble_end_function (decl
, fnname
);
3695 #ifndef IA64_UNWIND_INFO
3696 /* Otherwise, it feels unclean to switch sections in the middle. */
3697 output_function_exception_table ();
3701 fflush (asm_out_file
);
3703 /* Release all memory allocated by flow. */
3704 free_basic_block_vars (0);
3706 /* Release all memory held by regsets now. */
3707 regset_release_memory ();
3709 timevar_pop (TV_FINAL
);
3713 /* Write DBX symbols if requested. */
3715 /* Note that for those inline functions where we don't initially
3716 know for certain that we will be generating an out-of-line copy,
3717 the first invocation of this routine (rest_of_compilation) will
3718 skip over this code by doing a `goto exit_rest_of_compilation;'.
3719 Later on, finish_compilation will call rest_of_compilation again
3720 for those inline functions that need to have out-of-line copies
3721 generated. During that call, we *will* be routed past here. */
3723 timevar_push (TV_SYMOUT
);
3724 (*debug_hooks
->function_decl
) (decl
);
3725 timevar_pop (TV_SYMOUT
);
3727 exit_rest_of_compilation
:
3729 /* In case the function was not output,
3730 don't leave any temporary anonymous types
3731 queued up for sdb output. */
3732 #ifdef SDB_DEBUGGING_INFO
3733 if (write_symbols
== SDB_DEBUG
)
3734 sdbout_types (NULL_TREE
);
3737 reload_completed
= 0;
3738 flow2_completed
= 0;
3741 timevar_push (TV_FINAL
);
3743 /* Clear out the insn_length contents now that they are no
3745 init_insn_lengths ();
3747 /* Clear out the real_constant_chain before some of the rtx's
3748 it runs through become garbage. */
3749 clear_const_double_mem ();
3751 /* Show no temporary slots allocated. */
3754 free_basic_block_vars (0);
3756 timevar_pop (TV_FINAL
);
3758 /* Make sure volatile mem refs aren't considered valid operands for
3759 arithmetic insns. We must call this here if this is a nested inline
3760 function, since the above code leaves us in the init_recog state
3761 (from final.c), and the function context push/pop code does not
3762 save/restore volatile_ok.
3764 ??? Maybe it isn't necessary for expand_start_function to call this
3765 anymore if we do it here? */
3767 init_recog_no_volatile ();
3769 /* We're done with this function. Free up memory if we can. */
3770 free_after_parsing (cfun
);
3771 if (! DECL_DEFER_OUTPUT (decl
))
3772 free_after_compilation (cfun
);
3777 timevar_pop (TV_REST_OF_COMPILATION
);
3787 printf (_(" -ffixed-<register> Mark <register> as being unavailable to the compiler\n"));
3788 printf (_(" -fcall-used-<register> Mark <register> as being corrupted by function calls\n"));
3789 printf (_(" -fcall-saved-<register> Mark <register> as being preserved across functions\n"));
3790 printf (_(" -finline-limit=<number> Limits the size of inlined functions to <number>\n"));
3791 printf (_(" -fmessage-length=<number> Limits diagnostics messages lengths to <number> characters per line. 0 suppresses line-wrapping\n"));
3792 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"));
3794 for (i
= ARRAY_SIZE (f_options
); i
--;)
3796 const char *description
= f_options
[i
].description
;
3798 if (description
!= NULL
&& * description
!= 0)
3799 printf (" -f%-21s %s\n",
3800 f_options
[i
].string
, _(description
));
3803 printf (_(" -O[number] Set optimisation level to [number]\n"));
3804 printf (_(" -Os Optimise for space rather than speed\n"));
3805 for (i
= LAST_PARAM
; i
--;)
3807 const char *description
= compiler_params
[i
].help
;
3808 const int length
= 21-strlen(compiler_params
[i
].option
);
3810 if (description
!= NULL
&& * description
!= 0)
3811 printf (" --param %s=<value>%.*s%s\n",
3812 compiler_params
[i
].option
,
3813 length
> 0 ? length
: 1, " ",
3816 printf (_(" -pedantic Issue warnings needed by strict compliance to ISO C\n"));
3817 printf (_(" -pedantic-errors Like -pedantic except that errors are produced\n"));
3818 printf (_(" -w Suppress warnings\n"));
3819 printf (_(" -W Enable extra warnings\n"));
3821 for (i
= ARRAY_SIZE (W_options
); i
--;)
3823 const char *description
= W_options
[i
].description
;
3825 if (description
!= NULL
&& * description
!= 0)
3826 printf (" -W%-21s %s\n",
3827 W_options
[i
].string
, _(description
));
3830 printf (_(" -Wunused Enable unused warnings\n"));
3831 printf (_(" -Wlarger-than-<number> Warn if an object is larger than <number> bytes\n"));
3832 printf (_(" -p Enable function profiling\n"));
3833 #if defined (BLOCK_PROFILER) || defined (FUNCTION_BLOCK_PROFILER)
3834 printf (_(" -a Enable block profiling \n"));
3836 #if defined (BLOCK_PROFILER) || defined (FUNCTION_BLOCK_PROFILER) || defined FUNCTION_BLOCK_PROFILER_EXIT
3837 printf (_(" -ax Enable jump profiling \n"));
3839 printf (_(" -o <file> Place output into <file> \n"));
3841 -G <number> Put global and static data smaller than <number>\n\
3842 bytes into a special section (on some targets)\n"));
3844 for (i
= ARRAY_SIZE (debug_args
); i
--;)
3846 if (debug_args
[i
].description
!= NULL
)
3847 printf (" -g%-21s %s\n",
3848 debug_args
[i
].arg
, _(debug_args
[i
].description
));
3851 printf (_(" -aux-info <file> Emit declaration info into <file>\n"));
3852 printf (_(" -quiet Do not display functions compiled or elapsed time\n"));
3853 printf (_(" -version Display the compiler's version\n"));
3854 printf (_(" -d[letters] Enable dumps from specific passes of the compiler\n"));
3855 printf (_(" -dumpbase <file> Base name to be used for dumps from specific passes\n"));
3856 #if defined INSN_SCHEDULING
3857 printf (_(" -fsched-verbose=<number> Set the verbosity level of the scheduler\n"));
3859 printf (_(" --help Display this information\n"));
3864 /* Display descriptions of language specific options.
3865 If there is no description, note that there is an undocumented option.
3866 If the description is empty, do not display anything. (This allows
3867 options to be deliberately undocumented, for whatever reason).
3868 If the option string is missing, then this is a marker, indicating
3869 that the description string is in fact the name of a language, whose
3870 language specific options are to follow. */
3872 if (ARRAY_SIZE (documented_lang_options
) > 1)
3874 printf (_("\nLanguage specific options:\n"));
3876 for (i
= 0; i
< ARRAY_SIZE (documented_lang_options
); i
++)
3878 const char *description
= documented_lang_options
[i
].description
;
3879 const char *option
= documented_lang_options
[i
].option
;
3881 if (description
== NULL
)
3886 printf (_(" %-23.23s [undocumented]\n"), option
);
3888 else if (*description
== 0)
3890 else if (option
== NULL
)
3894 (_("\nThere are undocumented %s specific options as well.\n"),
3898 printf (_("\n Options for %s:\n"), description
);
3903 printf (" %-23.23s %s\n", option
, _(description
));
3908 printf (_("\nThere are undocumented %s specific options as well.\n"),
3911 display_target_options ();
3915 display_target_options ()
3919 if (ARRAY_SIZE (target_switches
) > 1
3920 #ifdef TARGET_OPTIONS
3921 || ARRAY_SIZE (target_options
) > 1
3929 printf (_("\nTarget specific options:\n"));
3931 for (i
= ARRAY_SIZE (target_switches
); i
--;)
3933 const char *option
= target_switches
[i
].name
;
3934 const char *description
= target_switches
[i
].description
;
3936 if (option
== NULL
|| *option
== 0)
3938 else if (description
== NULL
)
3943 printf (_(" -m%-23.23s [undocumented]\n"), option
);
3945 else if (* description
!= 0)
3946 doc
+= printf (" -m%-23.23s %s\n", option
, _(description
));
3949 #ifdef TARGET_OPTIONS
3950 for (i
= ARRAY_SIZE (target_options
); i
--;)
3952 const char *option
= target_options
[i
].prefix
;
3953 const char *description
= target_options
[i
].description
;
3955 if (option
== NULL
|| *option
== 0)
3957 else if (description
== NULL
)
3962 printf (_(" -m%-23.23s [undocumented]\n"), option
);
3964 else if (* description
!= 0)
3965 doc
+= printf (" -m%-23.23s %s\n", option
, _(description
));
3971 printf (_("\nThere are undocumented target specific options as well.\n"));
3973 printf (_(" They exist, but they are not documented.\n"));
3978 /* Parse a -d... comand line switch. */
3981 decode_d_option (arg
)
3990 for (i
= 0; i
< (int) DFI_MAX
; ++i
)
3991 dump_file
[i
].enabled
= 1;
3997 flag_print_asm_name
= 1;
4000 flag_dump_rtl_in_asm
= 1;
4001 flag_print_asm_name
= 1;
4004 graph_dump_format
= vcg
;
4007 rtl_dump_and_exit
= 1;
4012 case 'D': /* These are handled by the preprocessor. */
4018 for (i
= 0; i
< (int) DFI_MAX
; ++i
)
4019 if (c
== dump_file
[i
].debug_switch
)
4021 dump_file
[i
].enabled
= 1;
4026 warning ("unrecognized gcc debugging option: %c", c
);
4031 /* Parse a -f... comand line switch. ARG is the value after the -f.
4032 It is safe to access 'ARG - 2' to generate the full switch name.
4033 Return the number of strings consumed. */
4036 decode_f_option (arg
)
4040 const char *option_value
= NULL
;
4042 /* Search for the option in the table of binary f options. */
4043 for (j
= ARRAY_SIZE (f_options
); j
--;)
4045 if (!strcmp (arg
, f_options
[j
].string
))
4047 *f_options
[j
].variable
= f_options
[j
].on_value
;
4051 if (arg
[0] == 'n' && arg
[1] == 'o' && arg
[2] == '-'
4052 && ! strcmp (arg
+ 3, f_options
[j
].string
))
4054 *f_options
[j
].variable
= ! f_options
[j
].on_value
;
4059 if (!strcmp (arg
, "fast-math"))
4060 set_fast_math_flags();
4061 else if (!strcmp (arg
, "no-fast-math"))
4062 set_no_fast_math_flags();
4063 else if ((option_value
= skip_leading_substring (arg
, "inline-limit-"))
4064 || (option_value
= skip_leading_substring (arg
, "inline-limit=")))
4067 read_integral_parameter (option_value
, arg
- 2,
4069 set_param_value ("max-inline-insns", val
);
4071 #ifdef INSN_SCHEDULING
4072 else if ((option_value
= skip_leading_substring (arg
, "sched-verbose=")))
4073 fix_sched_param ("verbose", option_value
);
4075 else if ((option_value
= skip_leading_substring (arg
, "fixed-")))
4076 fix_register (option_value
, 1, 1);
4077 else if ((option_value
= skip_leading_substring (arg
, "call-used-")))
4078 fix_register (option_value
, 0, 1);
4079 else if ((option_value
= skip_leading_substring (arg
, "call-saved-")))
4080 fix_register (option_value
, 0, 0);
4081 else if ((option_value
= skip_leading_substring (arg
, "align-loops=")))
4082 align_loops
= read_integral_parameter (option_value
, arg
- 2, align_loops
);
4083 else if ((option_value
= skip_leading_substring (arg
, "align-functions=")))
4085 = read_integral_parameter (option_value
, arg
- 2, align_functions
);
4086 else if ((option_value
= skip_leading_substring (arg
, "align-jumps=")))
4087 align_jumps
= read_integral_parameter (option_value
, arg
- 2, align_jumps
);
4088 else if ((option_value
= skip_leading_substring (arg
, "align-labels=")))
4090 = read_integral_parameter (option_value
, arg
- 2, align_labels
);
4091 else if ((option_value
4092 = skip_leading_substring (arg
, "stack-limit-register=")))
4094 int reg
= decode_reg_name (option_value
);
4096 error ("unrecognized register name `%s'", option_value
);
4098 stack_limit_rtx
= gen_rtx_REG (Pmode
, reg
);
4100 else if ((option_value
4101 = skip_leading_substring (arg
, "stack-limit-symbol=")))
4104 nm
= ggc_strdup (option_value
);
4105 stack_limit_rtx
= gen_rtx_SYMBOL_REF (Pmode
, nm
);
4107 else if ((option_value
4108 = skip_leading_substring (arg
, "message-length=")))
4109 output_set_maximum_length
4110 (&global_dc
->buffer
, read_integral_parameter
4111 (option_value
, arg
- 2, diagnostic_line_cutoff (global_dc
)));
4112 else if ((option_value
4113 = skip_leading_substring (arg
, "diagnostics-show-location=")))
4115 if (!strcmp (option_value
, "once"))
4116 diagnostic_prefixing_rule (global_dc
) = DIAGNOSTICS_SHOW_PREFIX_ONCE
;
4117 else if (!strcmp (option_value
, "every-line"))
4118 diagnostic_prefixing_rule (global_dc
)
4119 = DIAGNOSTICS_SHOW_PREFIX_EVERY_LINE
;
4121 error ("Unrecognized option `%s'", arg
- 2);
4123 else if (!strcmp (arg
, "no-stack-limit"))
4124 stack_limit_rtx
= NULL_RTX
;
4125 else if (!strcmp (arg
, "preprocessed"))
4126 /* Recognise this switch but do nothing. This prevents warnings
4127 about an unrecognized switch if cpplib has not been linked in. */
4135 /* Parse a -W... comand line switch. ARG is the value after the -W.
4136 It is safe to access 'ARG - 2' to generate the full switch name.
4137 Return the number of strings consumed. */
4140 decode_W_option (arg
)
4143 const char *option_value
= NULL
;
4146 /* Search for the option in the table of binary W options. */
4148 for (j
= ARRAY_SIZE (W_options
); j
--;)
4150 if (!strcmp (arg
, W_options
[j
].string
))
4152 *W_options
[j
].variable
= W_options
[j
].on_value
;
4156 if (arg
[0] == 'n' && arg
[1] == 'o' && arg
[2] == '-'
4157 && ! strcmp (arg
+ 3, W_options
[j
].string
))
4159 *W_options
[j
].variable
= ! W_options
[j
].on_value
;
4164 if ((option_value
= skip_leading_substring (arg
, "id-clash-")))
4165 warning ("-Wid-clash-LEN is no longer supported");
4166 else if ((option_value
= skip_leading_substring (arg
, "larger-than-")))
4168 larger_than_size
= read_integral_parameter (option_value
, arg
- 2, -1);
4170 warn_larger_than
= larger_than_size
!= -1;
4172 else if (!strcmp (arg
, "unused"))
4176 else if (!strcmp (arg
, "no-unused"))
4186 /* Parse a -g... comand line switch. ARG is the value after the -g.
4187 It is safe to access 'ARG - 2' to generate the full switch name.
4188 Return the number of strings consumed. */
4191 decode_g_option (arg
)
4194 static unsigned level
=0;
4195 /* A lot of code assumes write_symbols == NO_DEBUG if the
4196 debugging level is 0 (thus -gstabs1 -gstabs0 would lose track
4197 of what debugging type has been selected). This records the
4198 selected type. It is an error to specify more than one
4200 static enum debug_info_type selected_debug_type
= NO_DEBUG
;
4201 /* Non-zero if debugging format has been explicitly set.
4202 -g and -ggdb don't explicitly set the debugging format so
4203 -gdwarf -g3 is equivalent to -gdwarf3. */
4204 static int type_explicitly_set_p
= 0;
4205 /* Indexed by enum debug_info_type. */
4206 static const char *debug_type_names
[] =
4208 "none", "stabs", "coff", "dwarf-1", "dwarf-2", "xcoff"
4211 /* The maximum admissible debug level value. */
4212 static const unsigned max_debug_level
= 3;
4214 /* Look up ARG in the table. */
4215 for (da
= debug_args
; da
->arg
; da
++)
4217 const int da_len
= strlen (da
->arg
);
4219 if (da_len
== 0 || ! strncmp (arg
, da
->arg
, da_len
))
4221 enum debug_info_type type
= da
->debug_type
;
4222 const char *p
= arg
+ da_len
;
4224 if (*p
&& (*p
< '0' || *p
> '9'))
4227 /* A debug flag without a level defaults to level 2.
4228 Note we do not want to call read_integral_parameter
4229 for that case since it will call atoi which
4232 ??? We may want to generalize the interface to
4233 read_integral_parameter to better handle this case
4234 if this case shows up often. */
4236 level
= read_integral_parameter (p
, 0, max_debug_level
+ 1);
4238 level
= (level
== 0) ? 2 : level
;
4240 if (da_len
> 1 && *p
&& !strncmp (arg
, "dwarf", da_len
))
4242 error ("use -gdwarf -g%d for DWARF v1, level %d",
4245 error ("use -gdwarf-2 for DWARF v2");
4248 if (level
> max_debug_level
)
4251 ignoring option `%s' due to invalid debug level specification",
4253 level
= debug_info_level
;
4256 if (type
== NO_DEBUG
)
4258 type
= PREFERRED_DEBUGGING_TYPE
;
4260 if (da_len
> 1 && strncmp (arg
, "gdb", da_len
) == 0)
4262 #if defined (DWARF2_DEBUGGING_INFO) && !defined (LINKER_DOES_NOT_WORK_WITH_DWARF2)
4263 type
= DWARF2_DEBUG
;
4265 #ifdef DBX_DEBUGGING_INFO
4272 if (type
== NO_DEBUG
)
4273 warning ("`%s': unknown or unsupported -g option", arg
- 2);
4275 /* Does it conflict with an already selected type? */
4276 if (type_explicitly_set_p
4277 /* -g/-ggdb don't conflict with anything. */
4278 && da
->debug_type
!= NO_DEBUG
4279 && type
!= selected_debug_type
)
4280 warning ("`%s' ignored, conflicts with `-g%s'",
4281 arg
- 2, debug_type_names
[(int) selected_debug_type
]);
4284 /* If the format has already been set, -g/-ggdb
4285 only change the debug level. */
4286 if (type_explicitly_set_p
&& da
->debug_type
== NO_DEBUG
)
4287 /* Don't change debugging type. */
4291 selected_debug_type
= type
;
4292 type_explicitly_set_p
= da
->debug_type
!= NO_DEBUG
;
4295 write_symbols
= (level
== 0
4297 : selected_debug_type
);
4298 use_gnu_debug_info_extensions
= da
->use_extensions_p
;
4299 debug_info_level
= (enum debug_info_level
) level
;
4312 /* Decode the first argument in the argv as a language-independent option.
4313 Return the number of strings consumed. */
4316 independent_decode_option (argc
, argv
)
4320 char *arg
= argv
[0];
4322 if (arg
[0] != '-' || arg
[1] == 0)
4334 if (!strcmp (arg
, "-help"))
4337 exit_after_options
= 1;
4340 if (!strcmp (arg
, "-target-help"))
4342 display_target_options ();
4343 exit_after_options
= 1;
4346 if (!strcmp (arg
, "-version"))
4348 print_version (stderr
, "");
4349 exit_after_options
= 1;
4352 /* Handle '--param <name>=<value>'. */
4353 if (strcmp (arg
, "-param") == 0)
4359 error ("-param option missing argument");
4363 /* Get the '<name>=<value>' parameter. */
4365 /* Look for the `='. */
4366 equal
= strchr (arg
, '=');
4368 error ("invalid --param option: %s", arg
);
4373 /* Zero out the `=' sign so that we get two separate strings. */
4375 /* Figure out what value is specified. */
4376 val
= read_integral_parameter (equal
+ 1, NULL
, INVALID_PARAM_VAL
);
4377 if (val
!= INVALID_PARAM_VAL
)
4378 set_param_value (arg
, val
);
4380 error ("invalid parameter value `%s'", equal
+ 1);
4395 /* Already been treated in main (). Do nothing. */
4399 set_target_switch (arg
+ 1);
4403 return decode_f_option (arg
+ 1);
4406 return decode_g_option (arg
+ 1);
4409 if (!strcmp (arg
, "dumpbase"))
4414 dump_base_name
= argv
[1];
4418 decode_d_option (arg
+ 1);
4422 if (!strcmp (arg
, "pedantic"))
4424 else if (!strcmp (arg
, "pedantic-errors"))
4425 flag_pedantic_errors
= pedantic
= 1;
4426 else if (arg
[1] == 0)
4433 if (!strcmp (arg
, "quiet"))
4440 if (!strcmp (arg
, "version"))
4448 inhibit_warnings
= 1;
4457 /* We save the value of warn_uninitialized, since if they put
4458 -Wuninitialized on the command line, we need to generate a
4459 warning about not using it without also specifying -O. */
4460 if (warn_uninitialized
!= 1)
4461 warn_uninitialized
= 2;
4464 return decode_W_option (arg
+ 1);
4470 #if !defined (BLOCK_PROFILER) || !defined (FUNCTION_BLOCK_PROFILER)
4471 warning ("`-a' option (basic block profile) not supported");
4473 profile_block_flag
= (profile_block_flag
< 2) ? 1 : 3;
4476 else if (!strcmp (arg
, "ax"))
4478 #if !defined (FUNCTION_BLOCK_PROFILER_EXIT) || !defined (BLOCK_PROFILER) || !defined (FUNCTION_BLOCK_PROFILER)
4479 warning ("`-ax' option (jump profiling) not supported");
4481 profile_block_flag
= (!profile_block_flag
4482 || profile_block_flag
== 2) ? 2 : 3;
4485 else if (!strncmp (arg
, "aux-info", 8))
4492 aux_info_file_name
= argv
[1];
4493 flag_gen_aux_info
= 1;
4496 else if (arg
[8] == '=')
4498 aux_info_file_name
= arg
+ 9;
4499 flag_gen_aux_info
= 1;
4514 asm_file_name
= argv
[1];
4529 g_switch_val
= read_integral_parameter (argv
[1], 0, -1);
4534 g_switch_val
= read_integral_parameter (arg
+ 1, 0, -1);
4538 if (g_switch_val
== -1)
4542 g_switch_set
= TRUE
;
4543 g_switch_value
= g_switch_val
;
4553 /* Entry point of cc1, cc1plus, jc1, f771, etc.
4554 Decode command args, then call compile_file.
4555 Exit code is FATAL_EXIT_CODE if can't open files or if there were
4556 any errors, or SUCCESS_EXIT_CODE if compilation succeeded.
4558 It is not safe to call this function more than once. */
4561 toplev_main (argc
, argv
)
4568 /* save in case md file wants to emit args as a comment. */
4572 p
= argv
[0] + strlen (argv
[0]);
4573 while (p
!= argv
[0] && !IS_DIR_SEPARATOR (p
[-1]))
4577 xmalloc_set_program_name (progname
);
4579 /* LC_CTYPE determines the character set used by the terminal so it has be set
4580 to output messages correctly. */
4582 #ifdef HAVE_LC_MESSAGES
4583 setlocale (LC_CTYPE
, "");
4584 setlocale (LC_MESSAGES
, "");
4586 setlocale (LC_ALL
, "");
4589 (void) bindtextdomain (PACKAGE
, localedir
);
4590 (void) textdomain (PACKAGE
);
4592 /* Install handler for SIGFPE, which may be received while we do
4593 compile-time floating point arithmetic. */
4594 signal (SIGFPE
, float_signal
);
4596 /* Trap fatal signals, e.g. SIGSEGV, and convert them to ICE messages. */
4598 signal (SIGSEGV
, crash_signal
);
4601 signal (SIGILL
, crash_signal
);
4604 signal (SIGBUS
, crash_signal
);
4607 signal (SIGABRT
, crash_signal
);
4609 #if defined SIGIOT && (!defined SIGABRT || SIGABRT != SIGIOT)
4610 signal (SIGIOT
, crash_signal
);
4613 decl_printable_name
= decl_name
;
4614 lang_expand_expr
= (lang_expand_expr_t
) do_abort
;
4616 /* Initialize whether `char' is signed. */
4617 flag_signed_char
= DEFAULT_SIGNED_CHAR
;
4618 #ifdef DEFAULT_SHORT_ENUMS
4619 /* Initialize how much space enums occupy, by default. */
4620 flag_short_enums
= DEFAULT_SHORT_ENUMS
;
4623 /* Initialize the garbage-collector. */
4626 ggc_add_rtx_root (&stack_limit_rtx
, 1);
4627 ggc_add_tree_root (¤t_function_decl
, 1);
4628 ggc_add_tree_root (¤t_function_func_begin_label
, 1);
4630 /* Initialize the diagnostics reporting machinery. */
4631 diagnostic_initialize (global_dc
);
4633 /* Register the language-independent parameters. */
4634 add_params (lang_independent_params
, LAST_PARAM
);
4636 /* Perform language-specific options intialization. */
4637 if (lang_hooks
.init_options
)
4638 (*lang_hooks
.init_options
) ();
4640 /* Scan to see what optimization level has been specified. That will
4641 determine the default value of many flags. */
4642 for (i
= 1; i
< argc
; i
++)
4644 if (!strcmp (argv
[i
], "-O"))
4649 else if (argv
[i
][0] == '-' && argv
[i
][1] == 'O')
4651 /* Handle -Os, -O2, -O3, -O69, ... */
4652 char *p
= &argv
[i
][2];
4654 if ((p
[0] == 's') && (p
[1] == 0))
4658 /* Optimizing for size forces optimize to be 2. */
4663 const int optimize_val
= read_integral_parameter (p
, p
- 2, -1);
4664 if (optimize_val
!= -1)
4666 optimize
= optimize_val
;
4676 flag_thread_jumps
= 1;
4678 flag_delayed_branch
= 1;
4680 #ifdef CAN_DEBUG_WITHOUT_FP
4681 flag_omit_frame_pointer
= 1;
4683 flag_guess_branch_prob
= 1;
4688 flag_optimize_sibling_calls
= 1;
4689 flag_cse_follow_jumps
= 1;
4690 flag_cse_skip_blocks
= 1;
4692 flag_expensive_optimizations
= 1;
4693 flag_strength_reduce
= 1;
4694 flag_rerun_cse_after_loop
= 1;
4695 flag_rerun_loop_opt
= 1;
4696 flag_caller_saves
= 1;
4699 #ifdef INSN_SCHEDULING
4700 flag_schedule_insns
= 1;
4701 flag_schedule_insns_after_reload
= 1;
4704 flag_strict_aliasing
= 1;
4705 flag_delete_null_pointer_checks
= 1;
4706 flag_reorder_blocks
= 1;
4711 flag_inline_functions
= 1;
4712 flag_rename_registers
= 1;
4715 if (optimize
< 2 || optimize_size
)
4720 align_functions
= 1;
4723 /* Initialize target_flags before OPTIMIZATION_OPTIONS so the latter can
4726 set_target_switch ("");
4728 /* Unwind tables are always present in an ABI-conformant IA-64
4729 object file, so the default should be ON. */
4730 #ifdef IA64_UNWIND_INFO
4731 flag_unwind_tables
= IA64_UNWIND_INFO
;
4734 #ifdef OPTIMIZATION_OPTIONS
4735 /* Allow default optimizations to be specified on a per-machine basis. */
4736 OPTIMIZATION_OPTIONS (optimize
, optimize_size
);
4739 /* Initialize register usage now so switches may override. */
4742 /* Perform normal command line switch decoding. */
4743 for (i
= 1; i
< argc
;)
4746 int indep_processed
;
4748 /* Give the language a chance to decode the option for itself. */
4749 lang_processed
= (*lang_hooks
.decode_option
) (argc
- i
, argv
+ i
);
4751 if (lang_processed
>= 0)
4752 /* Now see if the option also has a language independent meaning.
4753 Some options are both language specific and language independent,
4755 indep_processed
= independent_decode_option (argc
- i
, argv
+ i
);
4758 lang_processed
= -lang_processed
;
4759 indep_processed
= 0;
4762 if (lang_processed
|| indep_processed
)
4763 i
+= MAX (lang_processed
, indep_processed
);
4766 const char *option
= NULL
;
4767 const char *lang
= NULL
;
4770 /* It is possible that the command line switch is not valid for the
4771 current language, but it is valid for another language. In order
4772 to be compatible with previous versions of the compiler (which
4773 did not issue an error message in this case) we check for this
4774 possibility here. If we do find a match, then if extra_warnings
4775 is set we generate a warning message, otherwise we will just
4776 ignore the option. */
4777 for (j
= 0; j
< ARRAY_SIZE (documented_lang_options
); j
++)
4779 option
= documented_lang_options
[j
].option
;
4782 lang
= documented_lang_options
[j
].description
;
4783 else if (! strncmp (argv
[i
], option
, strlen (option
)))
4787 if (j
!= ARRAY_SIZE (documented_lang_options
))
4791 warning ("Ignoring command line option '%s'", argv
[i
]);
4794 ("(It is valid for %s but not the selected language)",
4798 else if (argv
[i
][0] == '-' && argv
[i
][1] == 'g')
4799 warning ("`%s': unknown or unsupported -g option", &argv
[i
][2]);
4801 error ("Unrecognized option `%s'", argv
[i
]);
4807 /* All command line options have been processed. */
4808 if (lang_hooks
.post_options
)
4809 (*lang_hooks
.post_options
) ();
4811 if (exit_after_options
)
4814 /* Checker uses the frame pointer. */
4815 if (flag_check_memory_usage
)
4816 flag_omit_frame_pointer
= 0;
4820 /* Inlining does not work if not optimizing,
4821 so force it not to be done. */
4825 /* The c_decode_option function and decode_option hook set
4826 this to `2' if -Wall is used, so we can avoid giving out
4827 lots of errors for people who don't realize what -Wall does. */
4828 if (warn_uninitialized
== 1)
4829 warning ("-Wuninitialized is not supported without -O");
4832 /* We do not currently support sibling-call optimization in the
4833 presence of exceptions. See PR2975 for a test-case that will
4834 fail if we try to combine both of these features. */
4835 if (flag_exceptions
)
4836 flag_optimize_sibling_calls
= 0;
4838 #ifdef OVERRIDE_OPTIONS
4839 /* Some machines may reject certain combinations of options. */
4843 /* Set up the align_*_log variables, defaulting them to 1 if they
4844 were still unset. */
4845 if (align_loops
<= 0) align_loops
= 1;
4846 align_loops_log
= floor_log2 (align_loops
* 2 - 1);
4847 if (align_jumps
<= 0) align_jumps
= 1;
4848 align_jumps_log
= floor_log2 (align_jumps
* 2 - 1);
4849 if (align_labels
<= 0) align_labels
= 1;
4850 align_labels_log
= floor_log2 (align_labels
* 2 - 1);
4851 if (align_functions
<= 0) align_functions
= 1;
4852 align_functions_log
= floor_log2 (align_functions
* 2 - 1);
4854 if (profile_block_flag
== 3)
4856 warning ("`-ax' and `-a' are conflicting options. `-a' ignored.");
4857 profile_block_flag
= 2;
4860 /* Unrolling all loops implies that standard loop unrolling must also
4862 if (flag_unroll_all_loops
)
4863 flag_unroll_loops
= 1;
4864 /* Loop unrolling requires that strength_reduction be on also. Silently
4865 turn on strength reduction here if it isn't already on. Also, the loop
4866 unrolling code assumes that cse will be run after loop, so that must
4867 be turned on also. */
4868 if (flag_unroll_loops
)
4870 flag_strength_reduce
= 1;
4871 flag_rerun_cse_after_loop
= 1;
4874 /* Warn about options that are not supported on this machine. */
4875 #ifndef INSN_SCHEDULING
4876 if (flag_schedule_insns
|| flag_schedule_insns_after_reload
)
4877 warning ("instruction scheduling not supported on this target machine");
4880 if (flag_delayed_branch
)
4881 warning ("this target machine does not have delayed branches");
4884 /* Some operating systems do not allow profiling without a frame
4886 if (!TARGET_ALLOWS_PROFILING_WITHOUT_FRAME_POINTER
4888 && flag_omit_frame_pointer
)
4890 error ("profiling does not work without a frame pointer");
4891 flag_omit_frame_pointer
= 0;
4894 user_label_prefix
= USER_LABEL_PREFIX
;
4895 if (flag_leading_underscore
!= -1)
4897 /* If the default prefix is more complicated than "" or "_",
4898 issue a warning and ignore this option. */
4899 if (user_label_prefix
[0] == 0 ||
4900 (user_label_prefix
[0] == '_' && user_label_prefix
[1] == 0))
4902 user_label_prefix
= flag_leading_underscore
? "_" : "";
4905 warning ("-f%sleading-underscore not supported on this target machine",
4906 flag_leading_underscore
? "" : "no-");
4909 /* If we are in verbose mode, write out the version and maybe all the
4910 option flags in use. */
4913 print_version (stderr
, "");
4915 print_switch_values (stderr
, 0, MAX_LINE
, "", " ", "\n");
4918 compile_file (filename
);
4921 return (FATAL_EXIT_CODE
);
4923 return (FATAL_EXIT_CODE
);
4924 return (SUCCESS_EXIT_CODE
);
4927 /* Decode -m switches. */
4928 /* Decode the switch -mNAME. */
4931 set_target_switch (name
)
4935 int valid_target_option
= 0;
4937 for (j
= 0; j
< ARRAY_SIZE (target_switches
); j
++)
4938 if (!strcmp (target_switches
[j
].name
, name
))
4940 if (target_switches
[j
].value
< 0)
4941 target_flags
&= ~-target_switches
[j
].value
;
4943 target_flags
|= target_switches
[j
].value
;
4944 valid_target_option
= 1;
4947 #ifdef TARGET_OPTIONS
4948 if (!valid_target_option
)
4949 for (j
= 0; j
< ARRAY_SIZE (target_options
); j
++)
4951 int len
= strlen (target_options
[j
].prefix
);
4952 if (!strncmp (target_options
[j
].prefix
, name
, len
))
4954 *target_options
[j
].variable
= name
+ len
;
4955 valid_target_option
= 1;
4960 if (!valid_target_option
)
4961 error ("Invalid option `%s'", name
);
4964 /* Print version information to FILE.
4965 Each line begins with INDENT (for the case where FILE is the
4966 assembler output file). */
4969 print_version (file
, indent
)
4974 #define __VERSION__ "[?]"
4978 "%s%s%s version %s (%s)\n%s\tcompiled by GNU C version %s.\n"
4980 "%s%s%s version %s (%s) compiled by CC.\n"
4982 , indent
, *indent
!= 0 ? " " : "",
4983 language_string
, version_string
, TARGET_NAME
,
4984 indent
, __VERSION__
);
4987 /* Print an option value and return the adjusted position in the line.
4988 ??? We don't handle error returns from fprintf (disk full); presumably
4989 other code will catch a disk full though. */
4992 print_single_switch (file
, pos
, max
, indent
, sep
, term
, type
, name
)
4995 const char *indent
, *sep
, *term
, *type
, *name
;
4997 /* The ultrix fprintf returns 0 on success, so compute the result we want
4998 here since we need it for the following test. */
4999 int len
= strlen (sep
) + strlen (type
) + strlen (name
);
5004 fprintf (file
, "%s", term
);
5009 fprintf (file
, "%s", indent
);
5010 pos
= strlen (indent
);
5012 fprintf (file
, "%s%s%s", sep
, type
, name
);
5017 /* Print active target switches to FILE.
5018 POS is the current cursor position and MAX is the size of a "line".
5019 Each line begins with INDENT and ends with TERM.
5020 Each switch is separated from the next by SEP. */
5023 print_switch_values (file
, pos
, max
, indent
, sep
, term
)
5026 const char *indent
, *sep
, *term
;
5031 /* Print the options as passed. */
5033 pos
= print_single_switch (file
, pos
, max
, indent
, *indent
? " " : "", term
,
5034 _("options passed: "), "");
5036 for (p
= &save_argv
[1]; *p
!= NULL
; p
++)
5040 if (strcmp (*p
, "-o") == 0)
5046 if (strcmp (*p
, "-quiet") == 0)
5048 if (strcmp (*p
, "-version") == 0)
5053 pos
= print_single_switch (file
, pos
, max
, indent
, sep
, term
, *p
, "");
5056 fprintf (file
, "%s", term
);
5058 /* Print the -f and -m options that have been enabled.
5059 We don't handle language specific options but printing argv
5062 pos
= print_single_switch (file
, 0, max
, indent
, *indent
? " " : "", term
,
5063 _("options enabled: "), "");
5065 for (j
= 0; j
< ARRAY_SIZE (f_options
); j
++)
5066 if (*f_options
[j
].variable
== f_options
[j
].on_value
)
5067 pos
= print_single_switch (file
, pos
, max
, indent
, sep
, term
,
5068 "-f", f_options
[j
].string
);
5070 /* Print target specific options. */
5072 for (j
= 0; j
< ARRAY_SIZE (target_switches
); j
++)
5073 if (target_switches
[j
].name
[0] != '\0'
5074 && target_switches
[j
].value
> 0
5075 && ((target_switches
[j
].value
& target_flags
)
5076 == target_switches
[j
].value
))
5078 pos
= print_single_switch (file
, pos
, max
, indent
, sep
, term
,
5079 "-m", target_switches
[j
].name
);
5082 #ifdef TARGET_OPTIONS
5083 for (j
= 0; j
< ARRAY_SIZE (target_options
); j
++)
5084 if (*target_options
[j
].variable
!= NULL
)
5087 sprintf (prefix
, "-m%s", target_options
[j
].prefix
);
5088 pos
= print_single_switch (file
, pos
, max
, indent
, sep
, term
,
5089 prefix
, *target_options
[j
].variable
);
5093 fprintf (file
, "%s", term
);