1 /* Top level of GNU C compiler
2 Copyright (C) 1987, 1988, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
3 1999, 2000 Free Software Foundation, Inc.
5 This file is part of GNU CC.
7 GNU CC is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
12 GNU CC is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GNU CC; see the file COPYING. If not, write to
19 the Free Software Foundation, 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
22 /* This is the top level of cc1/c++.
23 It parses command args, opens files, invokes the various passes
24 in the proper order, and counts the time used by each.
25 Error messages and low-level interface to malloc also handled here. */
28 #undef FLOAT /* This is for hpux. They should change hpux. */
29 #undef FFS /* Some systems define this in param.h. */
34 #ifdef HAVE_SYS_RESOURCE_H
35 # include <sys/resource.h>
38 #ifdef HAVE_SYS_TIMES_H
39 # include <sys/times.h>
47 #include "insn-attr.h"
48 #include "insn-codes.h"
49 #include "insn-config.h"
50 #include "hard-reg-set.h"
58 #include "basic-block.h"
65 #include "diagnostic.h"
67 #ifndef ACCUMULATE_OUTGOING_ARGS
68 #define ACCUMULATE_OUTGOING_ARGS 0
71 #ifdef DWARF_DEBUGGING_INFO
75 #if defined (DWARF2_UNWIND_INFO) || defined (DWARF2_DEBUGGING_INFO)
76 #include "dwarf2out.h"
79 #if defined(DBX_DEBUGGING_INFO) || defined(XCOFF_DEBUGGING_INFO)
83 #ifdef SDB_DEBUGGING_INFO
87 #ifdef XCOFF_DEBUGGING_INFO
92 /* The extra parameters substantially improve the I/O performance. */
94 vms_fopen (fname
, type
)
98 /* The <stdio.h> in the gcc-vms-1.42 distribution prototypes fopen with two
99 fixed arguments, which matches ANSI's specification but not VAXCRTL's
100 pre-ANSI implementation. This hack circumvents the mismatch problem. */
101 FILE *(*vmslib_fopen
)() = (FILE *(*)()) fopen
;
104 return (*vmslib_fopen
) (fname
, type
, "mbc=32",
105 "deq=64", "fop=tef", "shr=nil");
107 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 #ifdef ASM_IDENTIFY_LANGUAGE
165 /* This might or might not be used in ASM_IDENTIFY_LANGUAGE. */
166 static void output_lang_identify
PARAMS ((FILE *)) ATTRIBUTE_UNUSED
;
168 static void compile_file
PARAMS ((const char *));
169 static void display_help
PARAMS ((void));
170 static void mark_file_stack
PARAMS ((void *));
172 static void decode_d_option
PARAMS ((const char *));
173 static int decode_f_option
PARAMS ((const char *));
174 static int decode_W_option
PARAMS ((const char *));
175 static int decode_g_option
PARAMS ((const char *));
176 static unsigned int independent_decode_option
PARAMS ((int, char **,
179 static void print_version
PARAMS ((FILE *, const char *));
180 static int print_single_switch
PARAMS ((FILE *, int, int, const char *,
181 const char *, const char *,
182 const char *, const char *));
183 static void print_switch_values
PARAMS ((FILE *, int, int, const char *,
184 const char *, const char *));
186 /* Length of line when printing switch values. */
189 /* Name of program invoked, sans directories. */
191 const char *progname
;
193 /* Copy of arguments to main. */
197 /* Name of current original source file (what was input to cpp).
198 This comes from each #-command in the actual input. */
200 const char *input_filename
;
202 /* Name of top-level original source file (what was input to cpp).
203 This comes from the #-command at the beginning of the actual input.
204 If there isn't any there, then this is the cc1 input file name. */
206 const char *main_input_filename
;
208 /* Current line number in real source file. */
212 /* Nonzero if it is unsafe to create any new pseudo registers. */
215 /* Stack of currently pending input files. */
217 struct file_stack
*input_file_stack
;
219 /* Incremented on each change to input_file_stack. */
220 int input_file_stack_tick
;
222 /* Name to use as base of names for dump output files. */
224 const char *dump_base_name
;
226 /* Bit flags that specify the machine subtype we are compiling for.
227 Bits are tested using macros TARGET_... defined in the tm.h file
228 and set by `-m...' switches. Must be defined in rtlanal.c. */
230 extern int target_flags
;
232 /* Describes a dump file. */
234 struct dump_file_info
236 /* The unique extension to apply, e.g. ".jump". */
237 const char * const extension
;
239 /* The -d<c> character that enables this dump file. */
240 char const debug_switch
;
242 /* True if there is a corresponding graph dump file. */
243 char const graph_dump_p
;
245 /* True if the user selected this dump. */
248 /* True if the files have been initialized (ie truncated). */
252 /* Enumerate the extant dump files. */
288 /* Describes all the dump files. Should be kept in order of the
289 pass and in sync with dump_file_index above.
291 Remaining -d letters:
297 struct dump_file_info dump_file
[DFI_MAX
] =
299 { "rtl", 'r', 0, 0, 0 },
300 { "sibling", 'i', 0, 0, 0 },
301 { "jump", 'j', 0, 0, 0 },
302 { "cse", 's', 0, 0, 0 },
303 { "addressof", 'F', 0, 0, 0 },
304 { "ssa", 'e', 1, 0, 0 },
305 { "ussa", 'e', 1, 0, 0 }, /* Yes, duplicate enable switch. */
306 { "gcse", 'G', 1, 0, 0 },
307 { "loop", 'L', 1, 0, 0 },
308 { "cse2", 't', 1, 0, 0 },
309 { "cfg", 'f', 1, 0, 0 },
310 { "bp", 'b', 1, 0, 0 },
311 { "life", 'f', 1, 0, 0 }, /* Yes, duplicate enable switch. */
312 { "combine", 'c', 1, 0, 0 },
313 { "ce", 'C', 1, 0, 0 },
314 { "regmove", 'N', 1, 0, 0 },
315 { "sched", 'S', 1, 0, 0 },
316 { "lreg", 'l', 1, 0, 0 },
317 { "greg", 'g', 1, 0, 0 },
318 { "flow2", 'w', 1, 0, 0 },
319 { "ce2", 'E', 1, 0, 0 },
320 { "peephole2", 'z', 1, 0, 0 },
321 { "rnreg", 'n', 1, 0, 0 },
322 { "sched2", 'R', 1, 0, 0 },
323 { "bbro", 'B', 1, 0, 0 },
324 { "jump2", 'J', 1, 0, 0 },
325 { "mach", 'M', 1, 0, 0 },
326 { "dbr", 'd', 0, 0, 0 },
327 { "stack", 'k', 1, 0, 0 },
330 static int open_dump_file
PARAMS ((enum dump_file_index
, tree
));
331 static void close_dump_file
PARAMS ((enum dump_file_index
,
332 void (*) (FILE *, rtx
), rtx
));
334 /* Other flags saying which kinds of debugging dump have been requested. */
336 int rtl_dump_and_exit
;
337 int flag_print_asm_name
;
338 static int flag_print_mem
;
339 static int version_flag
;
340 static char * filename
;
341 enum graph_dump_types graph_dump_format
;
343 /* Name for output file of assembly code, specified with -o. */
347 /* Value of the -G xx switch, and whether it was passed or not. */
351 /* Type(s) of debugging information we are producing (if any).
352 See flags.h for the definitions of the different possible
353 types of debugging information. */
354 enum debug_info_type write_symbols
= NO_DEBUG
;
356 /* Level of debugging information we are producing. See flags.h
357 for the definitions of the different possible levels. */
358 enum debug_info_level debug_info_level
= DINFO_LEVEL_NONE
;
360 /* Nonzero means use GNU-only extensions in the generated symbolic
361 debugging information. */
362 /* Currently, this only has an effect when write_symbols is set to
363 DBX_DEBUG, XCOFF_DEBUG, or DWARF_DEBUG. */
364 int use_gnu_debug_info_extensions
= 0;
366 /* Nonzero means do optimizations. -O.
367 Particular numeric values stand for particular amounts of optimization;
368 thus, -O2 stores 2 here. However, the optimizations beyond the basic
369 ones are not controlled directly by this variable. Instead, they are
370 controlled by individual `flag_...' variables that are defaulted
371 based on this variable. */
375 /* Nonzero means optimize for size. -Os.
376 The only valid values are zero and non-zero. When optimize_size is
377 non-zero, optimize defaults to 2, but certain individual code
378 bloating optimizations are disabled. */
380 int optimize_size
= 0;
382 /* Number of error messages and warning messages so far. */
385 int warningcount
= 0;
388 /* The FUNCTION_DECL for the function currently being compiled,
389 or 0 if between functions. */
390 tree current_function_decl
;
392 /* Set to the FUNC_BEGIN label of the current function, or NULL_TREE
394 tree current_function_func_begin_label
;
396 /* Pointer to function to compute the name to use to print a declaration.
397 DECL is the declaration in question.
398 VERBOSITY determines what information will be printed:
399 0: DECL_NAME, demangled as necessary.
400 1: and scope information.
401 2: and any other information that might be interesting, such as function
402 parameter types in C++. */
404 const char *(*decl_printable_name
) PARAMS ((tree
, int));
406 /* Pointer to function to compute rtl for a language-specific tree code. */
408 typedef rtx (*lang_expand_expr_t
)
409 PARAMS ((union tree_node
*, rtx
, enum machine_mode
,
410 enum expand_modifier modifier
));
412 lang_expand_expr_t lang_expand_expr
= 0;
414 tree (*lang_expand_constant
) PARAMS ((tree
)) = 0;
416 /* Pointer to function to finish handling an incomplete decl at the
417 end of compilation. */
419 void (*incomplete_decl_finalize_hook
) PARAMS ((tree
)) = 0;
421 /* Nonzero if generating code to do profiling. */
423 int profile_flag
= 0;
425 /* Nonzero if generating code to do profiling on a line-by-line basis. */
427 int profile_block_flag
;
429 /* Nonzero if generating code to profile program flow graph arcs. */
431 int profile_arc_flag
= 0;
433 /* Nonzero if generating info for gcov to calculate line test coverage. */
435 int flag_test_coverage
= 0;
437 /* Nonzero indicates that branch taken probabilities should be calculated. */
439 int flag_branch_probabilities
= 0;
441 /* Nonzero if basic blocks should be reordered. */
443 int flag_reorder_blocks
= 0;
445 /* Nonzero if registers should be renamed */
447 int flag_rename_registers
= 0;
449 /* Nonzero for -pedantic switch: warn about anything
450 that standard spec forbids. */
454 /* Temporarily suppress certain warnings.
455 This is set while reading code from a system header file. */
457 int in_system_header
= 0;
459 /* Don't print functions as they are compiled and don't print
460 times taken by the various passes. -quiet. */
466 /* Nonzero means `char' should be signed. */
468 int flag_signed_char
;
470 /* Nonzero means give an enum type only as many bytes as it needs. */
472 int flag_short_enums
;
474 /* Nonzero for -fcaller-saves: allocate values in regs that need to
475 be saved across function calls, if that produces overall better code.
476 Optional now, so people can test it. */
478 #ifdef DEFAULT_CALLER_SAVES
479 int flag_caller_saves
= 1;
481 int flag_caller_saves
= 0;
484 /* Nonzero if structures and unions should be returned in memory.
486 This should only be defined if compatibility with another compiler or
487 with an ABI is needed, because it results in slower code. */
489 #ifndef DEFAULT_PCC_STRUCT_RETURN
490 #define DEFAULT_PCC_STRUCT_RETURN 1
493 /* Nonzero for -fpcc-struct-return: return values the same way PCC does. */
495 int flag_pcc_struct_return
= DEFAULT_PCC_STRUCT_RETURN
;
497 /* Nonzero for -fforce-mem: load memory value into a register
498 before arithmetic on it. This makes better cse but slower compilation. */
500 int flag_force_mem
= 0;
502 /* Nonzero for -fforce-addr: load memory address into a register before
503 reference to memory. This makes better cse but slower compilation. */
505 int flag_force_addr
= 0;
507 /* Nonzero for -fdefer-pop: don't pop args after each function call;
508 instead save them up to pop many calls' args with one insns. */
510 int flag_defer_pop
= 0;
512 /* Nonzero for -ffloat-store: don't allocate floats and doubles
513 in extended-precision registers. */
515 int flag_float_store
= 0;
517 /* Nonzero for -fcse-follow-jumps:
518 have cse follow jumps to do a more extensive job. */
520 int flag_cse_follow_jumps
;
522 /* Nonzero for -fcse-skip-blocks:
523 have cse follow a branch around a block. */
524 int flag_cse_skip_blocks
;
526 /* Nonzero for -fexpensive-optimizations:
527 perform miscellaneous relatively-expensive optimizations. */
528 int flag_expensive_optimizations
;
530 /* Nonzero for -fthread-jumps:
531 have jump optimize output of loop. */
533 int flag_thread_jumps
;
535 /* Nonzero enables strength-reduction in loop.c. */
537 int flag_strength_reduce
= 0;
539 /* Nonzero enables loop unrolling in unroll.c. Only loops for which the
540 number of iterations can be calculated at compile-time (UNROLL_COMPLETELY,
541 UNROLL_MODULO) or at run-time (preconditioned to be UNROLL_MODULO) are
544 int flag_unroll_loops
;
546 /* Nonzero enables loop unrolling in unroll.c. All loops are unrolled.
547 This is generally not a win. */
549 int flag_unroll_all_loops
;
551 /* Nonzero forces all invariant computations in loops to be moved
554 int flag_move_all_movables
= 0;
556 /* Nonzero forces all general induction variables in loops to be
559 int flag_reduce_all_givs
= 0;
561 /* Nonzero to perform full register move optimization passes. This is the
564 int flag_regmove
= 0;
566 /* Nonzero for -fwritable-strings:
567 store string constants in data segment and don't uniquize them. */
569 int flag_writable_strings
= 0;
571 /* Nonzero means don't put addresses of constant functions in registers.
572 Used for compiling the Unix kernel, where strange substitutions are
573 done on the assembly output. */
575 int flag_no_function_cse
= 0;
577 /* Nonzero for -fomit-frame-pointer:
578 don't make a frame pointer in simple functions that don't require one. */
580 int flag_omit_frame_pointer
= 0;
582 /* Nonzero means place each function into its own section on those platforms
583 which support arbitrary section names and unlimited numbers of sections. */
585 int flag_function_sections
= 0;
587 /* ... and similar for data. */
589 int flag_data_sections
= 0;
591 /* Nonzero to inhibit use of define_optimization peephole opts. */
593 int flag_no_peephole
= 0;
595 /* Nonzero allows GCC to violate some IEEE or ANSI rules regarding math
596 operations in the interest of optimization. For example it allows
597 GCC to assume arguments to sqrt are nonnegative numbers, allowing
598 faster code for sqrt to be generated. */
600 int flag_fast_math
= 0;
602 /* Nonzero allows GCC to optimize sibling and tail recursive calls. */
604 int flag_optimize_sibling_calls
= 0;
606 /* Nonzero means the front end generally wants `errno' maintained by math
607 operations, like built-in SQRT, unless overridden by flag_fast_math. */
609 int flag_errno_math
= 1;
611 /* 0 means straightforward implementation of complex divide acceptable.
612 1 means wide ranges of inputs must work for complex divide.
613 2 means C9X-like requirements for complex divide (not yet implemented). */
615 int flag_complex_divide_method
= 0;
617 /* Nonzero means all references through pointers are volatile. */
621 /* Nonzero means treat all global and extern variables as volatile. */
623 int flag_volatile_global
;
625 /* Nonzero means treat all static variables as volatile. */
627 int flag_volatile_static
;
629 /* Nonzero means just do syntax checking; don't output anything. */
631 int flag_syntax_only
= 0;
633 /* Nonzero means perform global cse. */
635 static int flag_gcse
;
637 /* Nonzero means to use global dataflow analysis to eliminate
638 useless null pointer tests. */
640 static int flag_delete_null_pointer_checks
;
642 /* Nonzero means to rerun cse after loop optimization. This increases
643 compilation time about 20% and picks up a few more common expressions. */
645 static int flag_rerun_cse_after_loop
;
647 /* Nonzero means to run loop optimizations twice. */
649 int flag_rerun_loop_opt
;
651 /* Nonzero for -finline-functions: ok to inline functions that look like
652 good inline candidates. */
654 int flag_inline_functions
;
656 /* Nonzero for -fkeep-inline-functions: even if we make a function
657 go inline everywhere, keep its definition around for debugging
660 int flag_keep_inline_functions
;
662 /* Nonzero means that functions will not be inlined. */
666 /* Nonzero means that we should emit static const variables
667 regardless of whether or not optimization is turned on. */
669 int flag_keep_static_consts
= 1;
671 /* Nonzero means we should be saving declaration info into a .X file. */
673 int flag_gen_aux_info
= 0;
675 /* Specified name of aux-info file. */
677 static char *aux_info_file_name
;
679 /* Nonzero means make the text shared if supported. */
681 int flag_shared_data
;
683 /* Nonzero means schedule into delayed branch slots if supported. */
685 int flag_delayed_branch
;
687 /* Nonzero if we are compiling pure (sharable) code.
688 Value is 1 if we are doing reasonable (i.e. simple
689 offset into offset table) pic. Value is 2 if we can
690 only perform register offsets. */
694 /* Nonzero means generate extra code for exception handling and enable
695 exception handling. */
699 /* Nonzero means use the new model for exception handling. Replaces
700 -DNEW_EH_MODEL as a compile option. */
702 int flag_new_exceptions
= 1;
704 /* Nonzero means generate frame unwind info table when supported */
706 int flag_unwind_tables
= 0;
708 /* Nonzero means don't place uninitialized global data in common storage
713 /* Nonzero means pretend it is OK to examine bits of target floats,
714 even if that isn't true. The resulting code will have incorrect constants,
715 but the same series of instructions that the native compiler would make. */
717 int flag_pretend_float
;
719 /* Nonzero means change certain warnings into errors.
720 Usually these are warnings about failure to conform to some standard. */
722 int flag_pedantic_errors
= 0;
724 /* flag_schedule_insns means schedule insns within basic blocks (before
726 flag_schedule_insns_after_reload means schedule insns after
729 int flag_schedule_insns
= 0;
730 int flag_schedule_insns_after_reload
= 0;
732 /* The following flags have effect only for scheduling before register
735 flag_schedule_interblock means schedule insns accross basic blocks.
736 flag_schedule_speculative means allow speculative motion of non-load insns.
737 flag_schedule_speculative_load means allow speculative motion of some
739 flag_schedule_speculative_load_dangerous allows speculative motion of more
742 int flag_schedule_interblock
= 1;
743 int flag_schedule_speculative
= 1;
744 int flag_schedule_speculative_load
= 0;
745 int flag_schedule_speculative_load_dangerous
= 0;
747 int flag_single_precision_constant
;
749 /* flag_on_branch_count_reg means try to replace add-1,compare,branch tupple
750 by a cheaper branch, on a count register. */
751 int flag_branch_on_count_reg
;
753 /* -finhibit-size-directive inhibits output of .size for ELF.
754 This is used only for compiling crtstuff.c,
755 and it may be extended to other effects
756 needed for crtstuff.c on other systems. */
757 int flag_inhibit_size_directive
= 0;
759 /* -fverbose-asm causes extra commentary information to be produced in
760 the generated assembly code (to make it more readable). This option
761 is generally only of use to those who actually need to read the
762 generated assembly code (perhaps while debugging the compiler itself).
763 -fno-verbose-asm, the default, causes the extra information
764 to be omitted and is useful when comparing two assembler files. */
766 int flag_verbose_asm
= 0;
768 /* -dA causes debug commentary information to be produced in
769 the generated assembly code (to make it more readable). This option
770 is generally only of use to those who actually need to read the
771 generated assembly code (perhaps while debugging the compiler itself).
772 Currently, this switch is only used by dwarfout.c; however, it is intended
773 to be a catchall for printing debug information in the assembler file. */
775 int flag_debug_asm
= 0;
777 /* -fgnu-linker specifies use of the GNU linker for initializations.
778 (Or, more generally, a linker that handles initializations.)
779 -fno-gnu-linker says that collect2 will be used. */
781 int flag_gnu_linker
= 0;
783 int flag_gnu_linker
= 1;
789 /* Tag all structures with __attribute__(packed) */
790 int flag_pack_struct
= 0;
792 /* Emit code to check for stack overflow; also may cause large objects
793 to be allocated dynamically. */
794 int flag_stack_check
;
796 /* When non-NULL, indicates that whenever space is allocated on the
797 stack, the resulting stack pointer must not pass this
798 address---that is, for stacks that grow downward, the stack pointer
799 must always be greater than or equal to this address; for stacks
800 that grow upward, the stack pointer must be less than this address.
801 At present, the rtx may be either a REG or a SYMBOL_REF, although
802 the support provided depends on the backend. */
805 /* -fcheck-memory-usage causes extra code to be generated in order to check
806 memory accesses. This is used by a detector of bad memory accesses such
808 int flag_check_memory_usage
= 0;
810 /* -fprefix-function-name causes function name to be prefixed. This
811 can be used with -fcheck-memory-usage to isolate code compiled with
812 -fcheck-memory-usage. */
813 int flag_prefix_function_name
= 0;
815 /* 0 if pointer arguments may alias each other. True in C.
816 1 if pointer arguments may not alias each other but may alias
818 2 if pointer arguments may not alias each other and may not
819 alias global variables. True in Fortran.
820 This defaults to 0 for C. */
821 int flag_argument_noalias
= 0;
823 /* Nonzero if we should do (language-dependent) alias analysis.
824 Typically, this analysis will assume that expressions of certain
825 types do not alias expressions of certain other types. Only used
826 if alias analysis (in general) is enabled. */
827 int flag_strict_aliasing
= 0;
829 /* Instrument functions with calls at entry and exit, for profiling. */
830 int flag_instrument_function_entry_exit
= 0;
832 /* Nonzero means ignore `#ident' directives. 0 means handle them.
833 On SVR4 targets, it also controls whether or not to emit a
834 string identifying the compiler. */
836 int flag_no_ident
= 0;
838 /* This will perform a peephole pass before sched2. */
839 int flag_peephole2
= 0;
841 /* -fbounded-pointers causes gcc to compile pointers as composite
842 objects occupying three words: the pointer value, the base address
843 of the referent object, and the address immediately beyond the end
844 of the referent object. The base and extent allow us to perform
845 runtime bounds checking. -fbounded-pointers implies -fcheck-bounds. */
846 int flag_bounded_pointers
= 0;
848 /* -fcheck-bounds causes gcc to generate array bounds checks.
849 For C, C++: defaults to value of flag_bounded_pointers.
850 For ObjC: defaults to off.
851 For Java: defaults to on.
852 For Fortran: defaults to off.
853 For CHILL: defaults to off. */
854 int flag_bounds_check
= 0;
856 /* If one, renumber instruction UIDs to reduce the number of
857 unused UIDs if there are a lot of instructions. If greater than
858 one, unconditionally renumber instruction UIDs. */
859 int flag_renumber_insns
= 1;
861 /* Values of the -falign-* flags: how much to align labels in code.
862 0 means `use default', 1 means `don't align'.
863 For each variable, there is an _log variant which is the power
864 of two not less than the variable, for .align output. */
871 int align_labels_log
;
873 int align_functions_log
;
875 /* Table of supported debugging formats. */
879 /* Since PREFERRED_DEBUGGING_TYPE isn't necessarily a
880 constant expression, we use NO_DEBUG in its place. */
881 enum debug_info_type debug_type
;
882 int use_extensions_p
;
883 const char * description
;
887 { "", NO_DEBUG
, DEFAULT_GDB_EXTENSIONS
,
888 "Generate default debug format output" },
889 { "gdb", NO_DEBUG
, 1, "Generate default extended debug format output" },
890 #ifdef DBX_DEBUGGING_INFO
891 { "stabs", DBX_DEBUG
, 0, "Generate STABS format debug output" },
892 { "stabs+", DBX_DEBUG
, 1, "Generate extended STABS format debug output" },
894 #ifdef DWARF_DEBUGGING_INFO
895 { "dwarf", DWARF_DEBUG
, 0, "Generate DWARF-1 format debug output"},
896 { "dwarf+", DWARF_DEBUG
, 1,
897 "Generated extended DWARF-1 format debug output" },
899 #ifdef DWARF2_DEBUGGING_INFO
900 { "dwarf-2", DWARF2_DEBUG
, 0, "Enable DWARF-2 debug output" },
902 #ifdef XCOFF_DEBUGGING_INFO
903 { "xcoff", XCOFF_DEBUG
, 0, "Generate XCOFF format debug output" },
904 { "xcoff+", XCOFF_DEBUG
, 1, "Generate extended XCOFF format debug output" },
906 #ifdef SDB_DEBUGGING_INFO
907 { "coff", SDB_DEBUG
, 0, "Generate COFF format debug output" },
917 const char * description
;
919 lang_independent_options
;
921 /* Add or remove a leading underscore from user symbols. */
922 int flag_leading_underscore
= -1;
924 /* The user symbol prefix after having resolved same. */
925 const char *user_label_prefix
;
927 /* A default for same. */
928 #ifndef USER_LABEL_PREFIX
929 #define USER_LABEL_PREFIX ""
932 /* Table of language-independent -f options.
933 STRING is the option name. VARIABLE is the address of the variable.
934 ON_VALUE is the value to store in VARIABLE
935 if `-fSTRING' is seen as an option.
936 (If `-fno-STRING' is seen as an option, the opposite value is stored.) */
938 lang_independent_options f_options
[] =
940 {"float-store", &flag_float_store
, 1,
941 "Do not store floats in registers" },
942 {"volatile", &flag_volatile
, 1,
943 "Consider all mem refs through pointers as volatile"},
944 {"volatile-global", &flag_volatile_global
, 1,
945 "Consider all mem refs to global data to be volatile" },
946 {"volatile-static", &flag_volatile_static
, 1,
947 "Consider all mem refs to static data to be volatile" },
948 {"defer-pop", &flag_defer_pop
, 1,
949 "Defer popping functions args from stack until later" },
950 {"omit-frame-pointer", &flag_omit_frame_pointer
, 1,
951 "When possible do not generate stack frames"},
952 {"optimize-sibling-calls", &flag_optimize_sibling_calls
, 1,
953 "Optimize sibling and tail recursive calls" },
954 {"cse-follow-jumps", &flag_cse_follow_jumps
, 1,
955 "When running CSE, follow jumps to their targets" },
956 {"cse-skip-blocks", &flag_cse_skip_blocks
, 1,
957 "When running CSE, follow conditional jumps" },
958 {"expensive-optimizations", &flag_expensive_optimizations
, 1,
959 "Perform a number of minor, expensive optimisations" },
960 {"thread-jumps", &flag_thread_jumps
, 1,
961 "Perform jump threading optimisations"},
962 {"strength-reduce", &flag_strength_reduce
, 1,
963 "Perform strength reduction optimisations" },
964 {"unroll-loops", &flag_unroll_loops
, 1,
965 "Perform loop unrolling when iteration count is known" },
966 {"unroll-all-loops", &flag_unroll_all_loops
, 1,
967 "Perform loop unrolling for all loops" },
968 {"move-all-movables", &flag_move_all_movables
, 1,
969 "Force all loop invariant computations out of loops" },
970 {"reduce-all-givs", &flag_reduce_all_givs
, 1,
971 "Strength reduce all loop general induction variables" },
972 {"writable-strings", &flag_writable_strings
, 1,
973 "Store strings in writable data section" },
974 {"peephole", &flag_no_peephole
, 0,
975 "Enable machine specific peephole optimisations" },
976 {"force-mem", &flag_force_mem
, 1,
977 "Copy memory operands into registers before using" },
978 {"force-addr", &flag_force_addr
, 1,
979 "Copy memory address constants into regs before using" },
980 {"function-cse", &flag_no_function_cse
, 0,
981 "Allow function addresses to be held in registers" },
982 {"inline-functions", &flag_inline_functions
, 1,
983 "Integrate simple functions into their callers" },
984 {"keep-inline-functions", &flag_keep_inline_functions
, 1,
985 "Generate code for funcs even if they are fully inlined" },
986 {"inline", &flag_no_inline
, 0,
987 "Pay attention to the 'inline' keyword"},
988 {"keep-static-consts", &flag_keep_static_consts
, 1,
989 "Emit static const variables even if they are not used" },
990 {"syntax-only", &flag_syntax_only
, 1,
991 "Check for syntax errors, then stop" },
992 {"shared-data", &flag_shared_data
, 1,
993 "Mark data as shared rather than private" },
994 {"caller-saves", &flag_caller_saves
, 1,
995 "Enable saving registers around function calls" },
996 {"pcc-struct-return", &flag_pcc_struct_return
, 1,
997 "Return 'short' aggregates in memory, not registers" },
998 {"reg-struct-return", &flag_pcc_struct_return
, 0,
999 "Return 'short' aggregates in registers" },
1000 {"delayed-branch", &flag_delayed_branch
, 1,
1001 "Attempt to fill delay slots of branch instructions" },
1002 {"gcse", &flag_gcse
, 1,
1003 "Perform the global common subexpression elimination" },
1004 {"rerun-cse-after-loop", &flag_rerun_cse_after_loop
, 1,
1005 "Run CSE pass after loop optimisations"},
1006 {"rerun-loop-opt", &flag_rerun_loop_opt
, 1,
1007 "Run the loop optimiser twice"},
1008 {"delete-null-pointer-checks", &flag_delete_null_pointer_checks
, 1,
1009 "Delete useless null pointer checks" },
1010 {"pretend-float", &flag_pretend_float
, 1,
1011 "Pretend that host and target use the same FP format"},
1012 {"schedule-insns", &flag_schedule_insns
, 1,
1013 "Reschedule instructions to avoid pipeline stalls"},
1014 {"schedule-insns2", &flag_schedule_insns_after_reload
, 1,
1015 "Run two passes of the instruction scheduler"},
1016 {"sched-interblock",&flag_schedule_interblock
, 1,
1017 "Enable scheduling across basic blocks" },
1018 {"sched-spec",&flag_schedule_speculative
, 1,
1019 "Allow speculative motion of non-loads" },
1020 {"sched-spec-load",&flag_schedule_speculative_load
, 1,
1021 "Allow speculative motion of some loads" },
1022 {"sched-spec-load-dangerous",&flag_schedule_speculative_load_dangerous
, 1,
1023 "Allow speculative motion of more loads" },
1024 {"branch-count-reg",&flag_branch_on_count_reg
, 1,
1025 "Replace add,compare,branch with branch on count reg"},
1026 {"pic", &flag_pic
, 1,
1027 "Generate position independent code, if possible"},
1028 {"PIC", &flag_pic
, 2, ""},
1029 {"exceptions", &flag_exceptions
, 1,
1030 "Enable exception handling" },
1031 {"new-exceptions", &flag_new_exceptions
, 1,
1032 "Use the new model for exception handling" },
1033 {"unwind-tables", &flag_unwind_tables
, 1,
1034 "Just generate unwind tables for exception handling" },
1035 {"sjlj-exceptions", &exceptions_via_longjmp
, 1,
1036 "Use setjmp/longjmp to handle exceptions" },
1037 {"asynchronous-exceptions", &asynchronous_exceptions
, 1,
1038 "Support asynchronous exceptions" },
1039 {"profile-arcs", &profile_arc_flag
, 1,
1040 "Insert arc based program profiling code" },
1041 {"test-coverage", &flag_test_coverage
, 1,
1042 "Create data files needed by gcov" },
1043 {"branch-probabilities", &flag_branch_probabilities
, 1,
1044 "Use profiling information for branch probabilities" },
1045 {"reorder-blocks", &flag_reorder_blocks
, 1,
1046 "Reorder basic blocks to improve code placement" },
1047 {"rename-registers", &flag_rename_registers
, 1,
1048 "Do the register renaming optimization pass"},
1049 {"fast-math", &flag_fast_math
, 1,
1050 "Improve FP speed by violating ANSI & IEEE rules" },
1051 {"common", &flag_no_common
, 0,
1052 "Do not put unitialised globals in the common section" },
1053 {"inhibit-size-directive", &flag_inhibit_size_directive
, 1,
1054 "Do not generate .size directives" },
1055 {"function-sections", &flag_function_sections
, 1,
1056 "place each function into its own section" },
1057 {"data-sections", &flag_data_sections
, 1,
1058 "place data items into their own section" },
1059 {"verbose-asm", &flag_verbose_asm
, 1,
1060 "Add extra commentry to assembler output"},
1061 {"gnu-linker", &flag_gnu_linker
, 1,
1062 "Output GNU ld formatted global initialisers"},
1063 {"regmove", &flag_regmove
, 1,
1064 "Enables a register move optimisation"},
1065 {"optimize-register-move", &flag_regmove
, 1,
1066 "Do the full regmove optimization pass"},
1067 {"pack-struct", &flag_pack_struct
, 1,
1068 "Pack structure members together without holes" },
1069 {"stack-check", &flag_stack_check
, 1,
1070 "Insert stack checking code into the program" },
1071 {"argument-alias", &flag_argument_noalias
, 0,
1072 "Specify that arguments may alias each other & globals"},
1073 {"argument-noalias", &flag_argument_noalias
, 1,
1074 "Assume arguments may alias globals but not each other"},
1075 {"argument-noalias-global", &flag_argument_noalias
, 2,
1076 "Assume arguments do not alias each other or globals" },
1077 {"strict-aliasing", &flag_strict_aliasing
, 1,
1078 "Assume strict aliasing rules apply" },
1079 {"align-loops", &align_loops
, 0,
1080 "Align the start of loops" },
1081 {"align-jumps", &align_jumps
, 0,
1082 "Align labels which are only reached by jumping" },
1083 {"align-labels", &align_labels
, 0,
1084 "Align all labels" },
1085 {"align-functions", &align_functions
, 0,
1086 "Align the start of functions" },
1087 {"check-memory-usage", &flag_check_memory_usage
, 1,
1088 "Generate code to check every memory access" },
1089 {"prefix-function-name", &flag_prefix_function_name
, 1,
1090 "Add a prefix to all function names" },
1091 {"dump-unnumbered", &flag_dump_unnumbered
, 1,
1092 "Suppress output of instruction numbers and line number notes in debugging dumps"},
1093 {"instrument-functions", &flag_instrument_function_entry_exit
, 1,
1094 "Instrument function entry/exit with profiling calls"},
1095 {"ssa", &flag_ssa
, 1,
1096 "Enable SSA optimizations" },
1097 {"leading-underscore", &flag_leading_underscore
, 1,
1098 "External symbols have a leading underscore" },
1099 {"ident", &flag_no_ident
, 0,
1100 "Process #ident directives"},
1101 { "peephole2", &flag_peephole2
, 1,
1102 "Enables an rtl peephole pass run before sched2" },
1103 {"math-errno", &flag_errno_math
, 1,
1104 "Set errno after built-in math functions"},
1105 {"bounded-pointers", &flag_bounded_pointers
, 1,
1106 "Compile pointers as triples: value, base & end" },
1107 {"bounds-check", &flag_bounds_check
, 1,
1108 "Generate code to check bounds before dereferencing pointers and arrays" },
1109 {"single-precision-constant", &flag_single_precision_constant
, 1,
1110 "Convert floating point constant to single precision constant"}
1113 #define NUM_ELEM(a) (sizeof (a) / sizeof ((a)[0]))
1115 /* Table of language-specific options. */
1117 static struct lang_opt
1119 const char * option
;
1120 const char * description
;
1122 documented_lang_options
[] =
1124 /* In order not to overload the --help output, the convention
1125 used here is to only describe those options which are not
1126 enabled by default. */
1128 { "-ansi", "Compile just for ANSI C" },
1129 { "-fallow-single-precision",
1130 "Do not promote floats to double if using -traditional" },
1131 { "-std= ", "Determine language standard"},
1133 { "-fsigned-bitfields", "" },
1134 { "-funsigned-bitfields","Make bitfields by unsigned by default" },
1135 { "-fno-signed-bitfields", "" },
1136 { "-fno-unsigned-bitfields","" },
1137 { "-fsigned-char", "Make 'char' be signed by default"},
1138 { "-funsigned-char", "Make 'char' be unsigned by default"},
1139 { "-fno-signed-char", "" },
1140 { "-fno-unsigned-char", "" },
1142 { "-ftraditional", "" },
1143 { "-traditional", "Attempt to support traditional K&R style C"},
1144 { "-fnotraditional", "" },
1145 { "-fno-traditional", "" },
1148 { "-fno-asm", "Do not recognise the 'asm' keyword" },
1149 { "-fbuiltin", "" },
1150 { "-fno-builtin", "Do not recognise any built in functions" },
1151 { "-fhosted", "Assume normal C execution environment" },
1152 { "-fno-hosted", "" },
1154 "Assume that standard libraries & main might not exist" },
1155 { "-fno-freestanding", "" },
1156 { "-fcond-mismatch", "Allow different types as args of ? operator"},
1157 { "-fno-cond-mismatch", "" },
1158 { "-fdollars-in-identifiers", "Allow the use of $ inside identifiers" },
1159 { "-fno-dollars-in-identifiers", "" },
1160 { "-fpreprocessed", "" },
1161 { "-fno-preprocessed", "" },
1162 { "-fshort-double", "Use the same size for double as for float" },
1163 { "-fno-short-double", "" },
1164 { "-fshort-enums", "Use the smallest fitting integer to hold enums"},
1165 { "-fno-short-enums", "" },
1166 { "-fshort-wchar", "Override the underlying type for wchar_t to `unsigned short'" },
1167 { "-fno-short-wchar", "" },
1169 { "-Wall", "Enable most warning messages" },
1170 { "-Wbad-function-cast",
1171 "Warn about casting functions to incompatible types" },
1172 { "-Wno-bad-function-cast", "" },
1173 { "-Wmissing-noreturn",
1174 "Warn about functions which might be candidates for attribute noreturn" },
1175 { "-Wno-missing-noreturn", "" },
1176 { "-Wcast-qual", "Warn about casts which discard qualifiers"},
1177 { "-Wno-cast-qual", "" },
1178 { "-Wchar-subscripts", "Warn about subscripts whose type is 'char'"},
1179 { "-Wno-char-subscripts", "" },
1180 { "-Wcomment", "Warn if nested comments are detected" },
1181 { "-Wno-comment", "" },
1182 { "-Wcomments", "Warn if nested comments are detected" },
1183 { "-Wno-comments", "" },
1184 { "-Wconversion", "Warn about possibly confusing type conversions" },
1185 { "-Wno-conversion", "" },
1186 { "-Wformat", "Warn about printf format anomalies" },
1187 { "-Wno-format", "" },
1188 { "-Wimplicit-function-declaration",
1189 "Warn about implicit function declarations" },
1190 { "-Wno-implicit-function-declaration", "" },
1191 { "-Werror-implicit-function-declaration", "" },
1192 { "-Wimplicit-int", "Warn when a declaration does not specify a type" },
1193 { "-Wno-implicit-int", "" },
1194 { "-Wimplicit", "" },
1195 { "-Wno-implicit", "" },
1196 { "-Wimport", "Warn about the use of the #import directive" },
1197 { "-Wno-import", "" },
1198 { "-Wlong-long","" },
1199 { "-Wno-long-long", "Do not warn about using 'long long' when -pedantic" },
1200 { "-Wmain", "Warn about suspicious declarations of main" },
1201 { "-Wno-main", "" },
1202 { "-Wmissing-braces",
1203 "Warn about possibly missing braces around initialisers" },
1204 { "-Wno-missing-braces", "" },
1205 { "-Wmissing-declarations",
1206 "Warn about global funcs without previous declarations"},
1207 { "-Wno-missing-declarations", "" },
1208 { "-Wmissing-prototypes", "Warn about global funcs without prototypes" },
1209 { "-Wno-missing-prototypes", "" },
1210 { "-Wmultichar", "Warn about use of multicharacter literals"},
1211 { "-Wno-multichar", "" },
1212 { "-Wnested-externs", "Warn about externs not at file scope level" },
1213 { "-Wno-nested-externs", "" },
1214 { "-Wparentheses", "Warn about possible missing parentheses" },
1215 { "-Wno-parentheses", "" },
1216 { "-Wpointer-arith", "Warn about function pointer arithmetic" },
1217 { "-Wno-pointer-arith", "" },
1218 { "-Wredundant-decls",
1219 "Warn about multiple declarations of the same object" },
1220 { "-Wno-redundant-decls", "" },
1221 { "-Wsign-compare", "Warn about signed/unsigned comparisons" },
1222 { "-Wno-sign-compare", "" },
1223 { "-Wfloat-equal", "Warn about testing equality of floating point numbers" },
1224 { "-Wno-float-equal", "" },
1225 { "-Wunknown-pragmas", "Warn about unrecognized pragmas" },
1226 { "-Wno-unknown-pragmas", "" },
1227 { "-Wstrict-prototypes", "Warn about non-prototyped function decls" },
1228 { "-Wno-strict-prototypes", "" },
1229 { "-Wtraditional", "Warn about constructs whose meaning change in ANSI C"},
1230 { "-Wno-traditional", "" },
1231 { "-Wtrigraphs", "Warn when trigraphs are encountered" },
1232 { "-Wno-trigraphs", "" },
1234 { "-Wno-undef", "" },
1235 { "-Wwrite-strings", "Mark strings as 'const char *'"},
1236 { "-Wno-write-strings", "" },
1238 #define DEFINE_LANG_NAME(NAME) { NULL, NAME },
1240 /* These are for Objective C. */
1241 DEFINE_LANG_NAME ("Objective C")
1243 { "-lang-objc", "" },
1244 { "-gen-decls", "Dump decls to a .decl file" },
1245 { "-fgnu-runtime", "Generate code for GNU runtime environment" },
1246 { "-fno-gnu-runtime", "" },
1247 { "-fnext-runtime", "Generate code for NeXT runtime environment" },
1248 { "-fno-next-runtime", "" },
1249 { "-Wselector", "Warn if a selector has multiple methods" },
1250 { "-Wno-selector", "" },
1251 { "-Wprotocol", "" },
1252 { "-Wno-protocol", "Do not warn if inherited methods are unimplemented"},
1253 { "-print-objc-runtime-info",
1254 "Generate C header of platform specific features" },
1256 #include "options.h"
1260 /* Here is a table, controlled by the tm.h file, listing each -m switch
1261 and which bits in `target_switches' it should set or clear.
1262 If VALUE is positive, it is bits to set.
1263 If VALUE is negative, -VALUE is bits to clear.
1264 (The sign bit is not used so there is no confusion.) */
1270 const char * description
;
1272 target_switches
[] = TARGET_SWITCHES
;
1274 /* This table is similar, but allows the switch to have a value. */
1276 #ifdef TARGET_OPTIONS
1279 const char * prefix
;
1280 const char ** variable
;
1281 const char * description
;
1283 target_options
[] = TARGET_OPTIONS
;
1286 /* Options controlling warnings */
1288 /* Don't print warning messages. -w. */
1290 int inhibit_warnings
= 0;
1292 /* Print various extra warnings. -W. */
1294 int extra_warnings
= 0;
1296 /* Treat warnings as errors. -Werror. */
1298 int warnings_are_errors
= 0;
1300 /* Nonzero to warn about unused variables, functions et.al. */
1302 int warn_unused_function
;
1303 int warn_unused_label
;
1304 int warn_unused_parameter
;
1305 int warn_unused_variable
;
1306 int warn_unused_value
;
1309 set_Wunused (setting
)
1312 warn_unused_function
= setting
;
1313 warn_unused_label
= setting
;
1314 /* Unused function parameter warnings are reported when either ``-W
1315 -Wunused'' or ``-Wunused-parameter'' is specified. Differentiate
1316 -Wunused by setting WARN_UNUSED_PARAMETER to -1 */
1318 warn_unused_parameter
= 0;
1319 else if (!warn_unused_parameter
)
1320 warn_unused_parameter
= -1;
1321 warn_unused_variable
= setting
;
1322 warn_unused_value
= setting
;
1325 /* Nonzero to warn about code which is never reached. */
1327 int warn_notreached
;
1329 /* Nonzero to warn about variables used before they are initialized. */
1331 int warn_uninitialized
;
1333 /* Nonzero means warn about all declarations which shadow others. */
1337 /* Warn if a switch on an enum fails to have a case for every enum value. */
1341 /* Nonzero means warn about function definitions that default the return type
1342 or that use a null return and have a return-type other than void. */
1344 int warn_return_type
;
1346 /* Nonzero means warn about pointer casts that increase the required
1347 alignment of the target type (and might therefore lead to a crash
1348 due to a misaligned access). */
1350 int warn_cast_align
;
1352 /* Nonzero means warn about any identifiers that match in the first N
1353 characters. The value N is in `id_clash_len'. */
1358 /* Nonzero means warn about any objects definitions whose size is larger
1359 than N bytes. Also want about function definitions whose returned
1360 values are larger than N bytes. The value N is in `larger_than_size'. */
1362 int warn_larger_than
;
1363 HOST_WIDE_INT larger_than_size
;
1365 /* Nonzero means warn if inline function is too large. */
1369 /* Warn if a function returns an aggregate,
1370 since there are often incompatible calling conventions for doing this. */
1372 int warn_aggregate_return
;
1374 /* Warn if packed attribute on struct is unnecessary and inefficient. */
1378 /* Warn when gcc pads a structure to an alignment boundary. */
1382 /* Likewise for -W. */
1384 lang_independent_options W_options
[] =
1386 {"unused-function", &warn_unused_function
, 1, "Warn when a function is unused" },
1387 {"unused-label", &warn_unused_label
, 1, "Warn when a label is unused" },
1388 {"unused-parameter", &warn_unused_parameter
, 1, "Warn when a function parameter is unused" },
1389 {"unused-variable", &warn_unused_variable
, 1, "Warn when a variable is unused" },
1390 {"unused-value", &warn_unused_value
, 1, "Warn when an expression value is unused" },
1391 {"error", &warnings_are_errors
, 1, ""},
1392 {"shadow", &warn_shadow
, 1, "Warn when one local variable shadows another" },
1393 {"switch", &warn_switch
, 1,
1394 "Warn about enumerated switches missing a specific case" },
1395 {"aggregate-return", &warn_aggregate_return
, 1,
1396 "Warn about returning structures, unions or arrays" },
1397 {"cast-align", &warn_cast_align
, 1,
1398 "Warn about pointer casts which increase alignment" },
1399 {"unreachable-code", &warn_notreached
, 1,
1400 "Warn about code that will never be executed" },
1401 {"uninitialized", &warn_uninitialized
, 1,
1402 "Warn about unitialized automatic variables"},
1403 {"inline", &warn_inline
, 1,
1404 "Warn when an inlined function cannot be inlined"},
1405 {"packed", &warn_packed
, 1,
1406 "Warn when the packed attribute has no effect on struct layout"},
1407 {"padded", &warn_padded
, 1,
1408 "Warn when padding is required to align struct members"}
1411 /* Output files for assembler code (real compiler output)
1412 and debugging dumps. */
1415 FILE *aux_info_file
;
1416 FILE *rtl_dump_file
= NULL
;
1418 /* Decode the string P as an integral parameter.
1419 If the string is indeed an integer return its numeric value else
1420 issue an Invalid Option error for the option PNAME and return DEFVAL.
1421 If PNAME is zero just return DEFVAL, do not call error. */
1424 read_integral_parameter (p
, pname
, defval
)
1429 const char *endp
= p
;
1433 if (*endp
>= '0' && *endp
<= '9')
1442 error ("Invalid option `%s'", pname
);
1450 /* This is the default decl_printable_name function. */
1453 decl_name (decl
, verbosity
)
1455 int verbosity ATTRIBUTE_UNUSED
;
1457 return IDENTIFIER_POINTER (DECL_NAME (decl
));
1460 /* Mark P for GC. Also mark main_input_filename and input_filename. */
1466 struct file_stack
*stack
= *(struct file_stack
**)p
;
1468 /* We're only called for input_file_stack, so we can mark the current
1469 input_filename here as well. */
1470 ggc_mark_string (main_input_filename
);
1471 ggc_mark_string (input_filename
);
1475 ggc_mark_string (stack
->name
);
1476 stack
= stack
->next
;
1481 /* This calls abort and is used to avoid problems when abort if a macro.
1482 It is used when we need to pass the address of abort. */
1490 /* When `malloc.c' is compiled with `rcheck' defined,
1491 it calls this function to report clobberage. */
1495 const char * s ATTRIBUTE_UNUSED
;
1500 /* Return the logarithm of X, base 2, considering X unsigned,
1501 if X is a power of 2. Otherwise, returns -1.
1503 This should be used via the `exact_log2' macro. */
1507 register unsigned HOST_WIDE_INT x
;
1509 register int log
= 0;
1510 /* Test for 0 or a power of 2. */
1511 if (x
== 0 || x
!= (x
& -x
))
1513 while ((x
>>= 1) != 0)
1518 /* Given X, an unsigned number, return the largest int Y such that 2**Y <= X.
1519 If X is 0, return -1.
1521 This should be used via the floor_log2 macro. */
1525 register unsigned HOST_WIDE_INT x
;
1527 register int log
= -1;
1534 static int float_handler_set
;
1536 jmp_buf float_handler
;
1538 /* Signals actually come here. */
1541 float_signal (signo
)
1542 /* If this is missing, some compilers complain. */
1543 int signo ATTRIBUTE_UNUSED
;
1545 if (float_handled
== 0)
1546 crash_signal (signo
);
1547 #if defined (USG) || defined (hpux)
1548 signal (SIGFPE
, float_signal
); /* re-enable the signal catcher */
1551 signal (SIGFPE
, float_signal
);
1552 longjmp (float_handler
, 1);
1555 /* Specify where to longjmp to when a floating arithmetic error happens.
1556 If HANDLER is 0, it means don't handle the errors any more. */
1559 set_float_handler (handler
)
1562 float_handled
= (handler
!= 0);
1564 bcopy ((char *) handler
, (char *) float_handler
, sizeof (float_handler
));
1566 if (float_handled
&& ! float_handler_set
)
1568 signal (SIGFPE
, float_signal
);
1569 float_handler_set
= 1;
1573 /* This is a wrapper function for code which might elicit an
1574 arithmetic exception. That code should be passed in as a function
1575 pointer FN, and one argument DATA. DATA is usually a struct which
1576 contains the real input and output for function FN. This function
1577 returns 0 (failure) if longjmp was called (i.e. an exception
1578 occured.) It returns 1 (success) otherwise. */
1581 do_float_handler (fn
, data
)
1582 void (*fn
) PARAMS ((PTR
));
1589 /* We got here via longjmp() caused by an exception in function fn() */
1590 set_float_handler (NULL
);
1594 set_float_handler (buf
);
1596 set_float_handler (NULL
);
1600 /* Specify, in HANDLER, where to longjmp to when a floating arithmetic
1601 error happens, pushing the previous specification into OLD_HANDLER.
1602 Return an indication of whether there was a previous handler in effect. */
1605 push_float_handler (handler
, old_handler
)
1606 jmp_buf handler
, old_handler
;
1608 int was_handled
= float_handled
;
1612 memcpy ((char *) old_handler
, (char *) float_handler
,
1613 sizeof (float_handler
));
1615 memcpy ((char *) float_handler
, (char *) handler
, sizeof (float_handler
));
1619 /* Restore the previous specification of whether and where to longjmp to
1620 when a floating arithmetic error happens. */
1623 pop_float_handler (handled
, handler
)
1627 float_handled
= handled
;
1629 bcopy ((char *) handler
, (char *) float_handler
, sizeof (float_handler
));
1632 /* Handler for fatal signals, such as SIGSEGV. These are transformed
1633 into ICE messages, which is much more user friendly. */
1636 crash_signal (signo
)
1637 /* If this is missing, some compilers complain. */
1640 fatal ("Internal error: %s.\n\
1641 Please submit a full bug report.\n\
1642 See %s for instructions.", strsignal (signo
), GCCBUGURL
);
1645 /* Strip off a legitimate source ending from the input string NAME of
1646 length LEN. Rather than having to know the names used by all of
1647 our front ends, we strip off an ending of a period followed by
1648 up to five characters. (Java uses ".class".) */
1651 strip_off_ending (name
, len
)
1656 for (i
= 2; i
< 6 && len
> i
; i
++)
1658 if (name
[len
- i
] == '.')
1660 name
[len
- i
] = '\0';
1666 /* Output a quoted string. */
1669 output_quoted_string (asm_file
, string
)
1673 #ifdef OUTPUT_QUOTED_STRING
1674 OUTPUT_QUOTED_STRING (asm_file
, string
);
1678 putc ('\"', asm_file
);
1679 while ((c
= *string
++) != 0)
1681 if (c
== '\"' || c
== '\\')
1682 putc ('\\', asm_file
);
1685 putc ('\"', asm_file
);
1689 /* Output a file name in the form wanted by System V. */
1692 output_file_directive (asm_file
, input_name
)
1694 const char *input_name
;
1696 int len
= strlen (input_name
);
1697 const char *na
= input_name
+ len
;
1699 /* NA gets INPUT_NAME sans directory names. */
1700 while (na
> input_name
)
1702 if (IS_DIR_SEPARATOR (na
[-1]))
1707 #ifdef ASM_OUTPUT_MAIN_SOURCE_FILENAME
1708 ASM_OUTPUT_MAIN_SOURCE_FILENAME (asm_file
, na
);
1710 #ifdef ASM_OUTPUT_SOURCE_FILENAME
1711 ASM_OUTPUT_SOURCE_FILENAME (asm_file
, na
);
1713 fprintf (asm_file
, "\t.file\t");
1714 output_quoted_string (asm_file
, na
);
1715 fputc ('\n', asm_file
);
1720 #ifdef ASM_IDENTIFY_LANGUAGE
1721 /* Routine to build language identifier for object file. */
1723 output_lang_identify (asm_out_file
)
1726 int len
= strlen (lang_identify ()) + sizeof ("__gnu_compiled_") + 1;
1727 char *s
= (char *) alloca (len
);
1728 sprintf (s
, "__gnu_compiled_%s", lang_identify ());
1729 ASM_OUTPUT_LABEL (asm_out_file
, s
);
1733 /* Routine to open a dump file. Return true if the dump file is enabled. */
1736 open_dump_file (index
, decl
)
1737 enum dump_file_index index
;
1741 const char *open_arg
;
1744 if (! dump_file
[index
].enabled
)
1747 timevar_push (TV_DUMP
);
1748 if (rtl_dump_file
!= NULL
)
1749 fclose (rtl_dump_file
);
1751 sprintf (seq
, ".%02d.", index
);
1753 if (! dump_file
[index
].initialized
)
1755 /* If we've not initialized the files, do so now. */
1756 if (graph_dump_format
!= no_graph
1757 && dump_file
[index
].graph_dump_p
)
1759 dump_name
= concat (seq
, dump_file
[index
].extension
, NULL
);
1760 clean_graph_dump_file (dump_base_name
, dump_name
);
1763 dump_file
[index
].initialized
= 1;
1769 dump_name
= concat (dump_base_name
, seq
,
1770 dump_file
[index
].extension
, NULL
);
1772 rtl_dump_file
= fopen (dump_name
, open_arg
);
1773 if (rtl_dump_file
== NULL
)
1774 pfatal_with_name (dump_name
);
1779 fprintf (rtl_dump_file
, "\n;; Function %s\n\n",
1780 decl_printable_name (decl
, 2));
1782 timevar_pop (TV_DUMP
);
1786 /* Routine to close a dump file. */
1789 close_dump_file (index
, func
, insns
)
1790 enum dump_file_index index
;
1791 void (*func
) PARAMS ((FILE *, rtx
));
1794 if (! rtl_dump_file
)
1797 timevar_push (TV_DUMP
);
1799 && graph_dump_format
!= no_graph
1800 && dump_file
[index
].graph_dump_p
)
1805 sprintf (seq
, ".%02d.", index
);
1806 suffix
= concat (seq
, dump_file
[index
].extension
, NULL
);
1807 print_rtl_graph_with_bb (dump_base_name
, suffix
, insns
);
1812 func (rtl_dump_file
, insns
);
1814 fflush (rtl_dump_file
);
1815 fclose (rtl_dump_file
);
1817 rtl_dump_file
= NULL
;
1818 timevar_pop (TV_DUMP
);
1821 /* Do any final processing required for the declarations in VEC, of
1822 which there are LEN. We write out inline functions and variables
1823 that have been deferred until this point, but which are required.
1824 Returns non-zero if anything was put out. */
1826 wrapup_global_declarations (vec
, len
)
1833 int output_something
= 0;
1835 for (i
= 0; i
< len
; i
++)
1839 /* We're not deferring this any longer. */
1840 DECL_DEFER_OUTPUT (decl
) = 0;
1842 if (TREE_CODE (decl
) == VAR_DECL
&& DECL_SIZE (decl
) == 0
1843 && incomplete_decl_finalize_hook
!= 0)
1844 (*incomplete_decl_finalize_hook
) (decl
);
1847 /* Now emit any global variables or functions that we have been
1848 putting off. We need to loop in case one of the things emitted
1849 here references another one which comes earlier in the list. */
1853 for (i
= 0; i
< len
; i
++)
1857 if (TREE_ASM_WRITTEN (decl
) || DECL_EXTERNAL (decl
))
1860 /* Don't write out static consts, unless we still need them.
1862 We also keep static consts if not optimizing (for debugging),
1863 unless the user specified -fno-keep-static-consts.
1864 ??? They might be better written into the debug information.
1865 This is possible when using DWARF.
1867 A language processor that wants static constants to be always
1868 written out (even if it is not used) is responsible for
1869 calling rest_of_decl_compilation itself. E.g. the C front-end
1870 calls rest_of_decl_compilation from finish_decl.
1871 One motivation for this is that is conventional in some
1872 environments to write things like:
1873 static const char rcsid[] = "... version string ...";
1874 intending to force the string to be in the executable.
1876 A language processor that would prefer to have unneeded
1877 static constants "optimized away" would just defer writing
1878 them out until here. E.g. C++ does this, because static
1879 constants are often defined in header files.
1881 ??? A tempting alternative (for both C and C++) would be
1882 to force a constant to be written if and only if it is
1883 defined in a main file, as opposed to an include file. */
1885 if (TREE_CODE (decl
) == VAR_DECL
&& TREE_STATIC (decl
)
1886 && (! TREE_READONLY (decl
)
1887 || TREE_PUBLIC (decl
)
1888 || (!optimize
&& flag_keep_static_consts
)
1889 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl
))))
1892 rest_of_decl_compilation (decl
, NULL_PTR
, 1, 1);
1895 if (TREE_CODE (decl
) == FUNCTION_DECL
1896 && DECL_INITIAL (decl
) != 0
1897 && DECL_SAVED_INSNS (decl
) != 0
1898 && (flag_keep_inline_functions
1899 || (TREE_PUBLIC (decl
) && !DECL_COMDAT (decl
))
1900 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl
))))
1903 temporary_allocation ();
1904 output_inline_function (decl
);
1905 permanent_allocation (1);
1910 output_something
= 1;
1914 return output_something
;
1917 /* Issue appropriate warnings for the global declarations in VEC (of
1918 which there are LEN). Output debugging information for them. */
1920 check_global_declarations (vec
, len
)
1927 for (i
= 0; i
< len
; i
++)
1931 if (TREE_CODE (decl
) == VAR_DECL
&& TREE_STATIC (decl
)
1932 && ! TREE_ASM_WRITTEN (decl
))
1933 /* Cancel the RTL for this decl so that, if debugging info
1934 output for global variables is still to come,
1935 this one will be omitted. */
1936 DECL_RTL (decl
) = NULL
;
1938 /* Warn about any function
1939 declared static but not defined.
1940 We don't warn about variables,
1941 because many programs have static variables
1942 that exist only to get some text into the object file. */
1943 if (TREE_CODE (decl
) == FUNCTION_DECL
1944 && (warn_unused_function
1945 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl
)))
1946 && DECL_INITIAL (decl
) == 0
1947 && DECL_EXTERNAL (decl
)
1948 && ! DECL_ARTIFICIAL (decl
)
1949 && ! TREE_PUBLIC (decl
))
1951 if (TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl
)))
1952 pedwarn_with_decl (decl
,
1953 "`%s' used but never defined");
1955 warning_with_decl (decl
,
1956 "`%s' declared `static' but never defined");
1957 /* This symbol is effectively an "extern" declaration now. */
1958 TREE_PUBLIC (decl
) = 1;
1959 assemble_external (decl
);
1962 /* Warn about static fns or vars defined but not used,
1963 but not about inline functions or static consts
1964 since defining those in header files is normal practice. */
1965 if (((warn_unused_function
1966 && TREE_CODE (decl
) == FUNCTION_DECL
&& ! DECL_INLINE (decl
))
1967 || (warn_unused_variable
1968 && TREE_CODE (decl
) == VAR_DECL
&& ! TREE_READONLY (decl
)))
1969 && ! DECL_IN_SYSTEM_HEADER (decl
)
1970 && ! DECL_EXTERNAL (decl
)
1971 && ! TREE_PUBLIC (decl
)
1972 && ! TREE_USED (decl
)
1973 && (TREE_CODE (decl
) == FUNCTION_DECL
|| ! DECL_REGISTER (decl
))
1974 /* The TREE_USED bit for file-scope decls
1975 is kept in the identifier, to handle multiple
1976 external decls in different scopes. */
1977 && ! TREE_USED (DECL_NAME (decl
)))
1978 warning_with_decl (decl
, "`%s' defined but not used");
1980 timevar_push (TV_SYMOUT
);
1981 #ifdef SDB_DEBUGGING_INFO
1982 /* The COFF linker can move initialized global vars to the end.
1983 And that can screw up the symbol ordering.
1984 By putting the symbols in that order to begin with,
1985 we avoid a problem. mcsun!unido!fauern!tumuc!pes@uunet.uu.net. */
1986 if (write_symbols
== SDB_DEBUG
&& TREE_CODE (decl
) == VAR_DECL
1987 && TREE_PUBLIC (decl
) && DECL_INITIAL (decl
)
1988 && ! DECL_EXTERNAL (decl
)
1989 && DECL_RTL (decl
) != 0)
1990 sdbout_symbol (decl
, 0);
1992 /* Output COFF information for non-global
1993 file-scope initialized variables. */
1994 if (write_symbols
== SDB_DEBUG
1995 && TREE_CODE (decl
) == VAR_DECL
1996 && DECL_INITIAL (decl
)
1997 && ! DECL_EXTERNAL (decl
)
1998 && DECL_RTL (decl
) != 0
1999 && GET_CODE (DECL_RTL (decl
)) == MEM
)
2000 sdbout_toplevel_data (decl
);
2001 #endif /* SDB_DEBUGGING_INFO */
2002 #ifdef DWARF_DEBUGGING_INFO
2003 /* Output DWARF information for file-scope tentative data object
2004 declarations, file-scope (extern) function declarations (which
2005 had no corresponding body) and file-scope tagged type declarations
2006 and definitions which have not yet been forced out. */
2008 if (write_symbols
== DWARF_DEBUG
2009 && (TREE_CODE (decl
) != FUNCTION_DECL
|| !DECL_INITIAL (decl
)))
2010 dwarfout_file_scope_decl (decl
, 1);
2012 #ifdef DWARF2_DEBUGGING_INFO
2013 /* Output DWARF2 information for file-scope tentative data object
2014 declarations, file-scope (extern) function declarations (which
2015 had no corresponding body) and file-scope tagged type declarations
2016 and definitions which have not yet been forced out. */
2018 if (write_symbols
== DWARF2_DEBUG
2019 && (TREE_CODE (decl
) != FUNCTION_DECL
|| !DECL_INITIAL (decl
)))
2020 dwarf2out_decl (decl
);
2022 timevar_pop (TV_SYMOUT
);
2026 /* Save the current INPUT_FILENAME and LINENO on the top entry in the
2027 INPUT_FILE_STACK. Push a new entry for FILE and LINE, and set the
2028 INPUT_FILENAME and LINENO accordingly. */
2031 push_srcloc (file
, line
)
2035 struct file_stack
*fs
;
2037 if (input_file_stack
)
2039 input_file_stack
->name
= input_filename
;
2040 input_file_stack
->line
= lineno
;
2043 fs
= (struct file_stack
*) xmalloc (sizeof (struct file_stack
));
2044 fs
->name
= input_filename
= file
;
2045 fs
->line
= lineno
= line
;
2046 fs
->indent_level
= 0;
2047 fs
->next
= input_file_stack
;
2048 input_file_stack
= fs
;
2049 input_file_stack_tick
++;
2052 /* Pop the top entry off the stack of presently open source files.
2053 Restore the INPUT_FILENAME and LINENO from the new topmost entry on
2059 struct file_stack
*fs
;
2061 fs
= input_file_stack
;
2062 input_file_stack
= fs
->next
;
2064 input_file_stack_tick
++;
2065 /* The initial souce file is never popped. */
2066 if (!input_file_stack
)
2068 input_filename
= input_file_stack
->name
;
2069 lineno
= input_file_stack
->line
;
2072 /* Compile an entire file of output from cpp, named NAME.
2073 Write a file of assembly output and various debugging dumps. */
2081 int name_specified
= name
!= 0;
2083 if (dump_base_name
== 0)
2084 dump_base_name
= name
? name
: "gccdump";
2086 /* Start timing total execution time. */
2089 timevar_start (TV_TOTAL
);
2091 /* Initialize data in various passes. */
2095 name
= init_parse (name
);
2096 init_emit_once (debug_info_level
== DINFO_LEVEL_NORMAL
2097 || debug_info_level
== DINFO_LEVEL_VERBOSE
2098 || flag_test_coverage
2099 || warn_notreached
);
2102 init_decl_processing ();
2108 init_function_once ();
2109 init_stor_layout_once ();
2110 init_varasm_once ();
2112 /* The following initialization functions need to generate rtl, so
2113 provide a dummy function context for them. */
2114 init_dummy_function_start ();
2117 if (flag_caller_saves
)
2118 init_caller_save ();
2119 expand_dummy_function_end ();
2121 /* If auxiliary info generation is desired, open the output file.
2122 This goes in the same directory as the source file--unlike
2123 all the other output files. */
2124 if (flag_gen_aux_info
)
2126 aux_info_file
= fopen (aux_info_file_name
, "w");
2127 if (aux_info_file
== 0)
2128 pfatal_with_name (aux_info_file_name
);
2131 /* Open assembler code output file. */
2133 if (flag_syntax_only
)
2134 asm_out_file
= NULL
;
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 pfatal_with_name (asm_file_name
);
2158 #ifdef IO_BUFFER_SIZE
2159 setvbuf (asm_out_file
, (char *) xmalloc (IO_BUFFER_SIZE
),
2160 _IOFBF
, IO_BUFFER_SIZE
);
2164 if (ggc_p
&& name
!= 0)
2165 name
= ggc_alloc_string (name
, strlen (name
));
2167 input_filename
= name
;
2169 /* Put an entry on the input file stack for the main input file. */
2170 push_srcloc (input_filename
, 0);
2172 /* Perform language-specific initialization.
2173 This may set main_input_filename. */
2176 /* If the input doesn't start with a #line, use the input name
2177 as the official input file name. */
2178 if (main_input_filename
== 0)
2179 main_input_filename
= name
;
2181 if (flag_syntax_only
)
2183 write_symbols
= NO_DEBUG
;
2185 profile_block_flag
= 0;
2189 ASM_FILE_START (asm_out_file
);
2191 #ifdef ASM_COMMENT_START
2192 if (flag_verbose_asm
)
2194 /* Print the list of options in effect. */
2195 print_version (asm_out_file
, ASM_COMMENT_START
);
2196 print_switch_values (asm_out_file
, 0, MAX_LINE
,
2197 ASM_COMMENT_START
, " ", "\n");
2198 /* Add a blank line here so it appears in assembler output but not
2200 fprintf (asm_out_file
, "\n");
2204 /* Output something to inform GDB that this compilation was by GCC. */
2205 #ifndef ASM_IDENTIFY_GCC
2206 fprintf (asm_out_file
, "gcc2_compiled.:\n");
2208 ASM_IDENTIFY_GCC (asm_out_file
);
2211 /* Output something to identify which front-end produced this file. */
2212 #ifdef ASM_IDENTIFY_LANGUAGE
2213 ASM_IDENTIFY_LANGUAGE (asm_out_file
);
2215 } /* ! flag_syntax_only */
2217 #ifndef ASM_OUTPUT_SECTION_NAME
2218 if (flag_function_sections
)
2220 warning ("-ffunction-sections not supported for this target.");
2221 flag_function_sections
= 0;
2223 if (flag_data_sections
)
2225 warning ("-fdata-sections not supported for this target.");
2226 flag_data_sections
= 0;
2230 if (flag_function_sections
2231 && (profile_flag
|| profile_block_flag
))
2233 warning ("-ffunction-sections disabled; it makes profiling impossible.");
2234 flag_function_sections
= 0;
2237 #ifndef OBJECT_FORMAT_ELF
2238 if (flag_function_sections
&& write_symbols
!= NO_DEBUG
)
2239 warning ("-ffunction-sections may affect debugging on some targets.");
2242 /* ??? Note: There used to be a conditional here
2243 to call assemble_zeros without fail if DBX_DEBUGGING_INFO is defined.
2244 This was to guarantee separation between gcc_compiled. and
2245 the first function, for the sake of dbx on Suns.
2246 However, having the extra zero here confused the Emacs
2247 code for unexec, and might confuse other programs too.
2248 Therefore, I took out that change.
2249 In future versions we should find another way to solve
2250 that dbx problem. -- rms, 23 May 93. */
2252 /* Don't let the first function fall at the same address
2253 as gcc_compiled., if profiling. */
2254 if (profile_flag
|| profile_block_flag
)
2256 /* It's best if we can write a nop here since some
2257 assemblers don't tolerate zeros in the text section. */
2258 output_asm_insn (get_insn_template (CODE_FOR_nop
, NULL
), NULL_PTR
);
2261 /* If dbx symbol table desired, initialize writing it
2262 and output the predefined types. */
2263 timevar_push (TV_SYMOUT
);
2264 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
2265 if (write_symbols
== DBX_DEBUG
|| write_symbols
== XCOFF_DEBUG
)
2266 dbxout_init (asm_out_file
, main_input_filename
, getdecls ());
2268 #ifdef SDB_DEBUGGING_INFO
2269 if (write_symbols
== SDB_DEBUG
)
2270 sdbout_init (asm_out_file
, main_input_filename
, getdecls ());
2272 #ifdef DWARF_DEBUGGING_INFO
2273 if (write_symbols
== DWARF_DEBUG
)
2274 dwarfout_init (asm_out_file
, main_input_filename
);
2276 #ifdef DWARF2_UNWIND_INFO
2277 if (dwarf2out_do_frame ())
2278 dwarf2out_frame_init ();
2280 #ifdef DWARF2_DEBUGGING_INFO
2281 if (write_symbols
== DWARF2_DEBUG
)
2282 dwarf2out_init (asm_out_file
, main_input_filename
);
2284 timevar_pop (TV_SYMOUT
);
2286 /* Initialize yet another pass. */
2288 init_final (main_input_filename
);
2289 init_branch_prob (dump_base_name
);
2291 timevar_push (TV_PARSE
);
2293 /* Call the parser, which parses the entire file
2294 (calling rest_of_compilation for each function). */
2296 if (yyparse () != 0)
2298 if (errorcount
== 0)
2299 fnotice (stderr
, "Errors detected in input file (your bison.simple is out of date)\n");
2301 /* In case there were missing closebraces,
2302 get us back to the global binding level. */
2303 while (! global_bindings_p ())
2307 /* Compilation is now finished except for writing
2308 what's left of the symbol table output. */
2310 timevar_pop (TV_PARSE
);
2312 if (flag_syntax_only
)
2315 globals
= getdecls ();
2317 /* Really define vars that have had only a tentative definition.
2318 Really output inline functions that must actually be callable
2319 and have not been output so far. */
2322 int len
= list_length (globals
);
2323 tree
*vec
= (tree
*) xmalloc (sizeof (tree
) * len
);
2327 /* Process the decls in reverse order--earliest first.
2328 Put them into VEC from back to front, then take out from front. */
2330 for (i
= 0, decl
= globals
; i
< len
; i
++, decl
= TREE_CHAIN (decl
))
2331 vec
[len
- i
- 1] = decl
;
2333 wrapup_global_declarations (vec
, len
);
2335 /* This must occur after the loop to output deferred functions. Else
2336 the profiler initializer would not be emitted if all the functions
2337 in this compilation unit were deferred.
2339 output_func_start_profiler can not cause any additional functions or
2340 data to need to be output, so it need not be in the deferred function
2342 output_func_start_profiler ();
2344 /* Now that all possible functions have been output, we can dump
2345 the exception table. */
2347 #ifndef IA64_UNWIND_INFO
2348 output_exception_table ();
2350 free_exception_table ();
2352 check_global_declarations (vec
, len
);
2358 /* Write out any pending weak symbol declarations. */
2362 /* Do dbx symbols */
2363 timevar_push (TV_SYMOUT
);
2364 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
2365 if (write_symbols
== DBX_DEBUG
|| write_symbols
== XCOFF_DEBUG
)
2366 dbxout_finish (asm_out_file
, main_input_filename
);
2369 #ifdef DWARF_DEBUGGING_INFO
2370 if (write_symbols
== DWARF_DEBUG
)
2374 #ifdef DWARF2_UNWIND_INFO
2375 if (dwarf2out_do_frame ())
2376 dwarf2out_frame_finish ();
2379 #ifdef DWARF2_DEBUGGING_INFO
2380 if (write_symbols
== DWARF2_DEBUG
)
2381 dwarf2out_finish ();
2383 timevar_pop (TV_SYMOUT
);
2385 /* Output some stuff at end of file if nec. */
2387 end_final (dump_base_name
);
2389 if (profile_arc_flag
|| flag_test_coverage
|| flag_branch_probabilities
)
2391 timevar_push (TV_DUMP
);
2392 open_dump_file (DFI_bp
, NULL
);
2396 close_dump_file (DFI_bp
, NULL
, NULL_RTX
);
2397 timevar_pop (TV_DUMP
);
2401 ASM_FILE_END (asm_out_file
);
2404 /* Language-specific end of compilation actions. */
2408 /* Close the dump files. */
2410 if (flag_gen_aux_info
)
2412 fclose (aux_info_file
);
2414 unlink (aux_info_file_name
);
2417 if (optimize
> 0 && open_dump_file (DFI_combine
, NULL
))
2419 timevar_push (TV_DUMP
);
2420 dump_combine_total_stats (rtl_dump_file
);
2421 close_dump_file (DFI_combine
, NULL
, NULL_RTX
);
2422 timevar_pop (TV_DUMP
);
2425 /* Close non-debugging input and output files. Take special care to note
2426 whether fclose returns an error, since the pages might still be on the
2427 buffer chain while the file is open. */
2431 if (! flag_syntax_only
2432 && (ferror (asm_out_file
) != 0 || fclose (asm_out_file
) != 0))
2433 fatal_io_error (asm_file_name
);
2435 /* Do whatever is necessary to finish printing the graphs. */
2436 if (graph_dump_format
!= no_graph
)
2440 for (i
= 0; i
< DFI_MAX
; ++i
)
2441 if (dump_file
[i
].initialized
&& dump_file
[i
].graph_dump_p
)
2446 sprintf (seq
, ".%02d.", i
);
2447 suffix
= concat (seq
, dump_file
[i
].extension
, NULL
);
2448 finish_graph_dump_file (dump_base_name
, suffix
);
2453 /* Free up memory for the benefit of leak detectors. */
2456 /* Stop timing total execution time. */
2457 timevar_stop (TV_TOTAL
);
2459 /* Print the times. */
2461 timevar_print (stderr
);
2464 /* This is called from various places for FUNCTION_DECL, VAR_DECL,
2465 and TYPE_DECL nodes.
2467 This does nothing for local (non-static) variables, unless the
2468 variable is a register variable with an ASMSPEC. In that case, or
2469 if the variable is not an automatice, it sets up the RTL and
2470 outputs any assembler code (label definition, storage allocation
2471 and initialization).
2473 DECL is the declaration. If ASMSPEC is nonzero, it specifies
2474 the assembler symbol name to be used. TOP_LEVEL is nonzero
2475 if this declaration is not within a function. */
2478 rest_of_decl_compilation (decl
, asmspec
, top_level
, at_end
)
2480 const char *asmspec
;
2484 /* Declarations of variables, and of functions defined elsewhere. */
2486 /* The most obvious approach, to put an #ifndef around where
2487 this macro is used, doesn't work since it's inside a macro call. */
2488 #ifndef ASM_FINISH_DECLARE_OBJECT
2489 #define ASM_FINISH_DECLARE_OBJECT(FILE, DECL, TOP, END)
2492 /* Forward declarations for nested functions are not "external",
2493 but we need to treat them as if they were. */
2494 if (TREE_STATIC (decl
) || DECL_EXTERNAL (decl
)
2495 || TREE_CODE (decl
) == FUNCTION_DECL
)
2497 timevar_push (TV_VARCONST
);
2498 make_decl_rtl (decl
, asmspec
, top_level
);
2499 /* Initialized extern variable exists to be replaced
2500 with its value, or represents something that will be
2501 output in another file. */
2502 if (! (TREE_CODE (decl
) == VAR_DECL
2503 && DECL_EXTERNAL (decl
) && TREE_READONLY (decl
)
2504 && DECL_INITIAL (decl
) != 0
2505 && DECL_INITIAL (decl
) != error_mark_node
))
2506 /* Don't output anything
2507 when a tentative file-scope definition is seen.
2508 But at end of compilation, do output code for them. */
2509 if (! (! at_end
&& top_level
2510 && (DECL_INITIAL (decl
) == 0
2511 || DECL_INITIAL (decl
) == error_mark_node
)))
2512 assemble_variable (decl
, top_level
, at_end
, 0);
2513 if (decl
== last_assemble_variable_decl
)
2515 ASM_FINISH_DECLARE_OBJECT (asm_out_file
, decl
,
2518 timevar_pop (TV_VARCONST
);
2520 else if (DECL_REGISTER (decl
) && asmspec
!= 0)
2522 if (decode_reg_name (asmspec
) >= 0)
2524 DECL_RTL (decl
) = 0;
2525 make_decl_rtl (decl
, asmspec
, top_level
);
2528 error ("invalid register name `%s' for register variable", asmspec
);
2530 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
2531 else if ((write_symbols
== DBX_DEBUG
|| write_symbols
== XCOFF_DEBUG
)
2532 && TREE_CODE (decl
) == TYPE_DECL
)
2534 timevar_push (TV_SYMOUT
);
2535 dbxout_symbol (decl
, 0);
2536 timevar_pop (TV_SYMOUT
);
2539 #ifdef SDB_DEBUGGING_INFO
2540 else if (write_symbols
== SDB_DEBUG
&& top_level
2541 && TREE_CODE (decl
) == TYPE_DECL
)
2543 timevar_push (TV_SYMOUT
);
2544 sdbout_symbol (decl
, 0);
2545 timevar_pop (TV_SYMOUT
);
2550 /* Called after finishing a record, union or enumeral type. */
2553 rest_of_type_compilation (type
, toplev
)
2554 #if defined(DBX_DEBUGGING_INFO) || defined(XCOFF_DEBUGGING_INFO) || defined (SDB_DEBUGGING_INFO)
2558 tree type ATTRIBUTE_UNUSED
;
2559 int toplev ATTRIBUTE_UNUSED
;
2562 timevar_push (TV_SYMOUT
);
2563 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
2564 if (write_symbols
== DBX_DEBUG
|| write_symbols
== XCOFF_DEBUG
)
2565 dbxout_symbol (TYPE_STUB_DECL (type
), !toplev
);
2567 #ifdef SDB_DEBUGGING_INFO
2568 if (write_symbols
== SDB_DEBUG
)
2569 sdbout_symbol (TYPE_STUB_DECL (type
), !toplev
);
2571 timevar_pop (TV_SYMOUT
);
2574 /* DECL is an inline function, whose body is present, but which is not
2575 being output at this point. (We're putting that off until we need
2576 to do it.) If there are any actions that need to take place,
2577 including the emission of debugging information for the function,
2578 this is where they should go. This function may be called by
2579 language-dependent code for front-ends that do not even generate
2580 RTL for functions that don't need to be put out. */
2583 note_deferral_of_defined_inline_function (decl
)
2584 tree decl ATTRIBUTE_UNUSED
;
2586 #ifdef DWARF_DEBUGGING_INFO
2587 /* Generate the DWARF info for the "abstract" instance of a function
2588 which we may later generate inlined and/or out-of-line instances
2590 if (write_symbols
== DWARF_DEBUG
&& DECL_INLINE (decl
))
2592 /* The front-end may not have set CURRENT_FUNCTION_DECL, but the
2593 DWARF code expects it to be set in this case. Intuitively,
2594 DECL is the function we just finished defining, so setting
2595 CURRENT_FUNCTION_DECL is sensible. */
2596 tree saved_cfd
= current_function_decl
;
2597 current_function_decl
= decl
;
2599 /* Let the DWARF code do its work. */
2600 set_decl_abstract_flags (decl
, 1);
2601 dwarfout_file_scope_decl (decl
, 0);
2602 set_decl_abstract_flags (decl
, 0);
2604 /* Reset CURRENT_FUNCTION_DECL. */
2605 current_function_decl
= saved_cfd
;
2610 /* This is called from finish_function (within yyparse)
2611 after each top-level definition is parsed.
2612 It is supposed to compile that function or variable
2613 and output the assembler code for it.
2614 After we return, the tree storage is freed. */
2617 rest_of_compilation (decl
)
2623 int rebuild_label_notes_after_reload
;
2624 int register_life_up_to_date
;
2626 timevar_push (TV_REST_OF_COMPILATION
);
2628 /* When processing delayed functions, prepare_function_start() won't
2629 have been run to re-initialize it. */
2630 cse_not_expected
= ! optimize
;
2632 /* First, make sure that NOTE_BLOCK is set correctly for each
2633 NOTE_INSN_BLOCK_BEG/NOTE_INSN_BLOCK_END note. */
2634 if (!cfun
->x_whole_function_mode_p
)
2637 /* Then remove any notes we don't need. That will make iterating
2638 over the instruction sequence faster, and allow the garbage
2639 collector to reclaim the memory used by the notes. */
2640 remove_unnecessary_notes ();
2642 /* In function-at-a-time mode, we do not attempt to keep the BLOCK
2643 tree in sensible shape. So, we just recalculate it here. */
2644 if (cfun
->x_whole_function_mode_p
)
2647 /* If we are reconsidering an inline function
2648 at the end of compilation, skip the stuff for making it inline. */
2650 if (DECL_SAVED_INSNS (decl
) == 0)
2656 /* If this is nested inside an inlined external function, pretend
2657 it was only declared. Since we cannot inline such functions,
2658 generating code for this one is not only not necessary but will
2659 confuse some debugging output writers. */
2660 for (parent
= DECL_CONTEXT (current_function_decl
);
2661 parent
!= NULL_TREE
;
2662 parent
= get_containing_scope (parent
))
2663 if (TREE_CODE (parent
) == FUNCTION_DECL
2664 && DECL_INLINE (parent
) && DECL_EXTERNAL (parent
))
2666 DECL_INITIAL (decl
) = 0;
2667 goto exit_rest_of_compilation
;
2670 /* If requested, consider whether to make this function inline. */
2671 if (DECL_INLINE (decl
) || flag_inline_functions
)
2673 timevar_push (TV_INTEGRATION
);
2674 lose
= function_cannot_inline_p (decl
);
2675 timevar_pop (TV_INTEGRATION
);
2676 if (lose
|| ! optimize
)
2678 if (warn_inline
&& DECL_INLINE (decl
))
2679 warning_with_decl (decl
, lose
);
2680 DECL_ABSTRACT_ORIGIN (decl
) = 0;
2681 /* Don't really compile an extern inline function.
2682 If we can't make it inline, pretend
2683 it was only declared. */
2684 if (DECL_EXTERNAL (decl
))
2686 DECL_INITIAL (decl
) = 0;
2687 goto exit_rest_of_compilation
;
2691 /* ??? Note that this has the effect of making it look
2692 like "inline" was specified for a function if we choose
2693 to inline it. This isn't quite right, but it's
2694 probably not worth the trouble to fix. */
2695 inlinable
= DECL_INLINE (decl
) = 1;
2698 insns
= get_insns ();
2700 /* Dump the rtl code if we are dumping rtl. */
2702 if (open_dump_file (DFI_rtl
, decl
))
2704 if (DECL_SAVED_INSNS (decl
))
2705 fprintf (rtl_dump_file
, ";; (integrable)\n\n");
2706 close_dump_file (DFI_rtl
, print_rtl
, insns
);
2709 /* If function is inline, and we don't yet know whether to
2710 compile it by itself, defer decision till end of compilation.
2711 finish_compilation will call rest_of_compilation again
2712 for those functions that need to be output. Also defer those
2713 functions that we are supposed to defer. */
2716 || (DECL_INLINE (decl
)
2717 && ((! TREE_PUBLIC (decl
) && ! TREE_ADDRESSABLE (decl
)
2718 && ! flag_keep_inline_functions
)
2719 || DECL_EXTERNAL (decl
))))
2720 DECL_DEFER_OUTPUT (decl
) = 1;
2722 if (DECL_INLINE (decl
))
2723 /* DWARF wants seperate debugging info for abstract and
2724 concrete instances of all inline functions, including those
2725 declared inline but not inlined, and those inlined even
2726 though they weren't declared inline. Conveniently, that's
2727 what DECL_INLINE means at this point. */
2728 note_deferral_of_defined_inline_function (decl
);
2730 if (DECL_DEFER_OUTPUT (decl
))
2732 /* If -Wreturn-type, we have to do a bit of compilation.
2733 However, if we just fall through we will call
2734 save_for_inline_copying() which results in excessive
2735 memory use. Instead, we just want to call
2736 jump_optimize() to figure out whether or not we can fall
2737 off the end of the function; we do the minimum amount of
2738 work necessary to make that safe. And, we set optimize
2739 to zero to keep jump_optimize from working too hard. */
2740 if (warn_return_type
)
2742 int saved_optimize
= optimize
;
2744 find_exception_handler_labels ();
2745 jump_optimize (insns
, !JUMP_CROSS_JUMP
, !JUMP_NOOP_MOVES
,
2746 !JUMP_AFTER_REGSCAN
);
2747 optimize
= saved_optimize
;
2750 current_function_nothrow
= nothrow_function_p ();
2751 if (current_function_nothrow
)
2752 /* Now we know that this can't throw; set the flag for the benefit
2753 of other functions later in this translation unit. */
2754 TREE_NOTHROW (current_function_decl
) = 1;
2756 timevar_push (TV_INTEGRATION
);
2757 save_for_inline_nocopy (decl
);
2758 timevar_pop (TV_INTEGRATION
);
2759 DECL_SAVED_INSNS (decl
)->inlinable
= inlinable
;
2760 goto exit_rest_of_compilation
;
2763 /* If specified extern inline but we aren't inlining it, we are
2764 done. This goes for anything that gets here with DECL_EXTERNAL
2765 set, not just things with DECL_INLINE. */
2766 if (DECL_EXTERNAL (decl
))
2767 goto exit_rest_of_compilation
;
2770 init_EXPR_INSN_LIST_cache ();
2775 /* Initialize some variables used by the optimizers. */
2776 init_function_for_compilation ();
2778 if (! DECL_DEFER_OUTPUT (decl
))
2779 TREE_ASM_WRITTEN (decl
) = 1;
2781 /* Now that integrate will no longer see our rtl, we need not distinguish
2782 between the return value of this function and the return value of called
2784 rtx_equal_function_value_matters
= 0;
2786 /* Don't return yet if -Wreturn-type; we need to do jump_optimize. */
2787 if ((rtl_dump_and_exit
|| flag_syntax_only
) && !warn_return_type
)
2788 goto exit_rest_of_compilation
;
2790 /* Emit code to get eh context, if needed. */
2793 /* We may have potential sibling or tail recursion sites. Select one
2794 (of possibly multiple) methods of performing the call. */
2795 if (flag_optimize_sibling_calls
)
2797 timevar_push (TV_JUMP
);
2798 open_dump_file (DFI_sibling
, decl
);
2800 optimize_sibling_and_tail_recursive_calls ();
2802 close_dump_file (DFI_sibling
, print_rtl
, get_insns ());
2803 timevar_pop (TV_JUMP
);
2807 /* If we are doing position-independent code generation, now
2808 is the time to output special prologues and epilogues.
2809 We do not want to do this earlier, because it just clutters
2810 up inline functions with meaningless insns. */
2815 /* From now on, allocate rtl in current_obstack, not in saveable_obstack.
2816 Note that that may have been done above, in save_for_inline_copying.
2817 The call to resume_temporary_allocation near the end of this function
2818 goes back to the usual state of affairs. This must be done after
2819 we've built up any unwinders for exception handling, and done
2820 the FINALIZE_PIC work, if necessary. */
2822 rtl_in_current_obstack ();
2824 insns
= get_insns ();
2826 /* Copy any shared structure that should not be shared. */
2827 unshare_all_rtl (current_function_decl
, insns
);
2829 #ifdef SETJMP_VIA_SAVE_AREA
2830 /* This must be performed before virutal register instantiation. */
2831 if (current_function_calls_alloca
)
2832 optimize_save_area_alloca (insns
);
2835 /* Instantiate all virtual registers. */
2836 instantiate_virtual_regs (current_function_decl
, insns
);
2838 /* Find all the EH handlers. */
2839 find_exception_handler_labels ();
2841 open_dump_file (DFI_jump
, decl
);
2843 /* Always do one jump optimization pass to ensure that JUMP_LABEL fields
2844 are initialized and to compute whether control can drop off the end
2847 timevar_push (TV_JUMP
);
2848 /* Turn NOTE_INSN_EXPECTED_VALUE into REG_BR_PROB. Do this
2849 before jump optimization switches branch directions. */
2850 expected_value_to_br_prob ();
2852 reg_scan (insns
, max_reg_num (), 0);
2853 jump_optimize (insns
, !JUMP_CROSS_JUMP
, !JUMP_NOOP_MOVES
,
2854 JUMP_AFTER_REGSCAN
);
2856 timevar_pop (TV_JUMP
);
2858 /* Now is when we stop if -fsyntax-only and -Wreturn-type. */
2859 if (rtl_dump_and_exit
|| flag_syntax_only
|| DECL_DEFER_OUTPUT (decl
))
2861 close_dump_file (DFI_jump
, print_rtl
, insns
);
2862 goto exit_rest_of_compilation
;
2865 timevar_push (TV_JUMP
);
2869 find_basic_blocks (insns
, max_reg_num (), rtl_dump_file
);
2870 cleanup_cfg (insns
);
2872 /* ??? Run if-conversion before delete_null_pointer_checks,
2873 since the later does not preserve the CFG. This should
2874 be changed -- no since converting if's that are going to
2876 timevar_push (TV_IFCVT
);
2878 timevar_pop (TV_IFCVT
);
2880 /* Try to identify useless null pointer tests and delete them. */
2881 if (flag_delete_null_pointer_checks
)
2882 delete_null_pointer_checks (insns
);
2885 /* Jump optimization, and the removal of NULL pointer checks, may
2886 have reduced the number of instructions substantially. CSE, and
2887 future passes, allocate arrays whose dimensions involve the
2888 maximum instruction UID, so if we can reduce the maximum UID
2889 we'll save big on memory. */
2890 renumber_insns (rtl_dump_file
);
2891 timevar_pop (TV_JUMP
);
2893 close_dump_file (DFI_jump
, print_rtl
, insns
);
2898 /* Perform common subexpression elimination.
2899 Nonzero value from `cse_main' means that jumps were simplified
2900 and some code may now be unreachable, so do
2901 jump optimization again. */
2905 open_dump_file (DFI_cse
, decl
);
2906 timevar_push (TV_CSE
);
2908 reg_scan (insns
, max_reg_num (), 1);
2910 if (flag_thread_jumps
)
2912 timevar_push (TV_JUMP
);
2913 thread_jumps (insns
, max_reg_num (), 1);
2914 timevar_pop (TV_JUMP
);
2917 tem
= cse_main (insns
, max_reg_num (), 0, rtl_dump_file
);
2919 /* If we are not running the second CSE pass, then we are no longer
2920 expecting CSE to be run. */
2921 cse_not_expected
= !flag_rerun_cse_after_loop
;
2923 if (tem
|| optimize
> 1)
2925 timevar_push (TV_JUMP
);
2926 jump_optimize (insns
, !JUMP_CROSS_JUMP
, !JUMP_NOOP_MOVES
,
2927 !JUMP_AFTER_REGSCAN
);
2928 timevar_pop (TV_JUMP
);
2931 /* Run this after jump optmizations remove all the unreachable code
2932 so that unreachable code will not keep values live. */
2933 delete_trivially_dead_insns (insns
, max_reg_num ());
2935 /* Try to identify useless null pointer tests and delete them. */
2936 if (flag_delete_null_pointer_checks
)
2938 timevar_push (TV_JUMP
);
2939 find_basic_blocks (insns
, max_reg_num (), rtl_dump_file
);
2941 cleanup_cfg (insns
);
2943 delete_null_pointer_checks (insns
);
2944 timevar_pop (TV_JUMP
);
2947 /* The second pass of jump optimization is likely to have
2948 removed a bunch more instructions. */
2949 renumber_insns (rtl_dump_file
);
2951 timevar_pop (TV_CSE
);
2952 close_dump_file (DFI_cse
, print_rtl
, insns
);
2955 open_dump_file (DFI_addressof
, decl
);
2957 purge_addressof (insns
);
2958 reg_scan (insns
, max_reg_num (), 1);
2960 close_dump_file (DFI_addressof
, print_rtl
, insns
);
2965 if (optimize
> 0 && flag_ssa
)
2967 /* Convert to SSA form. */
2969 timevar_push (TV_TO_SSA
);
2970 open_dump_file (DFI_ssa
, decl
);
2972 find_basic_blocks (insns
, max_reg_num(), rtl_dump_file
);
2973 cleanup_cfg (insns
);
2976 close_dump_file (DFI_ssa
, print_rtl_with_bb
, insns
);
2977 timevar_pop (TV_TO_SSA
);
2979 /* Currently, there's nothing to do in SSA form. */
2981 /* Convert from SSA form. */
2983 timevar_push (TV_FROM_SSA
);
2984 open_dump_file (DFI_ussa
, decl
);
2986 convert_from_ssa ();
2987 /* New registers have been created. Rescan their usage. */
2988 reg_scan (insns
, max_reg_num (), 1);
2989 /* Life analysis used in SSA adds log_links but these
2990 shouldn't be there until the flow stage, so clear
2992 clear_log_links (insns
);
2994 close_dump_file (DFI_ussa
, print_rtl_with_bb
, insns
);
2995 timevar_pop (TV_FROM_SSA
);
3001 /* Perform global cse. */
3003 if (optimize
> 0 && flag_gcse
)
3005 timevar_push (TV_GCSE
);
3006 open_dump_file (DFI_gcse
, decl
);
3008 find_basic_blocks (insns
, max_reg_num(), rtl_dump_file
);
3009 cleanup_cfg (insns
);
3010 tem
= gcse_main (insns
, rtl_dump_file
);
3012 /* If gcse altered any jumps, rerun jump optimizations to clean
3016 timevar_push (TV_JUMP
);
3017 jump_optimize (insns
, !JUMP_CROSS_JUMP
, !JUMP_NOOP_MOVES
,
3018 !JUMP_AFTER_REGSCAN
);
3019 timevar_pop (TV_JUMP
);
3022 close_dump_file (DFI_gcse
, print_rtl
, insns
);
3023 timevar_pop (TV_GCSE
);
3029 /* Move constant computations out of loops. */
3033 timevar_push (TV_LOOP
);
3034 open_dump_file (DFI_loop
, decl
);
3036 if (flag_rerun_loop_opt
)
3038 /* We only want to perform unrolling once. */
3040 loop_optimize (insns
, rtl_dump_file
, 0);
3042 /* The first call to loop_optimize makes some instructions
3043 trivially dead. We delete those instructions now in the
3044 hope that doing so will make the heuristics in loop work
3045 better and possibly speed up compilation. */
3046 delete_trivially_dead_insns (insns
, max_reg_num ());
3048 /* The regscan pass is currently necessary as the alias
3049 analysis code depends on this information. */
3050 reg_scan (insns
, max_reg_num (), 1);
3052 loop_optimize (insns
, rtl_dump_file
, (flag_unroll_loops
? LOOP_UNROLL
: 0) | LOOP_BCT
);
3054 close_dump_file (DFI_loop
, print_rtl
, insns
);
3055 timevar_pop (TV_LOOP
);
3063 timevar_push (TV_CSE2
);
3064 open_dump_file (DFI_cse2
, decl
);
3066 if (flag_rerun_cse_after_loop
)
3068 /* Running another jump optimization pass before the second
3069 cse pass sometimes simplifies the RTL enough to allow
3070 the second CSE pass to do a better job. Jump_optimize can change
3071 max_reg_num so we must rerun reg_scan afterwards.
3072 ??? Rework to not call reg_scan so often. */
3073 timevar_push (TV_JUMP
);
3075 reg_scan (insns
, max_reg_num (), 0);
3076 jump_optimize (insns
, !JUMP_CROSS_JUMP
,
3077 !JUMP_NOOP_MOVES
, JUMP_AFTER_REGSCAN
);
3079 timevar_push (TV_IFCVT
);
3081 find_basic_blocks (insns
, max_reg_num (), rtl_dump_file
);
3082 cleanup_cfg (insns
);
3085 timevar_pop(TV_IFCVT
);
3087 timevar_pop (TV_JUMP
);
3089 reg_scan (insns
, max_reg_num (), 0);
3090 tem
= cse_main (insns
, max_reg_num (), 1, rtl_dump_file
);
3094 timevar_push (TV_JUMP
);
3095 jump_optimize (insns
, !JUMP_CROSS_JUMP
,
3096 !JUMP_NOOP_MOVES
, !JUMP_AFTER_REGSCAN
);
3097 timevar_pop (TV_JUMP
);
3101 if (flag_thread_jumps
)
3103 /* This pass of jump threading straightens out code
3104 that was kinked by loop optimization. */
3105 timevar_push (TV_JUMP
);
3106 reg_scan (insns
, max_reg_num (), 0);
3107 thread_jumps (insns
, max_reg_num (), 0);
3108 timevar_pop (TV_JUMP
);
3111 close_dump_file (DFI_cse2
, print_rtl
, insns
);
3112 timevar_pop (TV_CSE2
);
3118 cse_not_expected
= 1;
3123 /* Do control and data flow analysis; wrote some of the results to
3126 timevar_push (TV_FLOW
);
3127 open_dump_file (DFI_cfg
, decl
);
3129 find_basic_blocks (insns
, max_reg_num (), rtl_dump_file
);
3130 cleanup_cfg (insns
);
3132 close_dump_file (DFI_cfg
, print_rtl_with_bb
, insns
);
3134 if (profile_arc_flag
|| flag_test_coverage
|| flag_branch_probabilities
)
3136 timevar_push (TV_BRANCH_PROB
);
3137 open_dump_file (DFI_bp
, decl
);
3141 close_dump_file (DFI_bp
, print_rtl_with_bb
, insns
);
3142 timevar_pop (TV_BRANCH_PROB
);
3145 open_dump_file (DFI_life
, decl
);
3150 /* Discover and record the loop depth at the head of each basic
3151 block. The loop infrastructure does the real job for us. */
3152 flow_loops_find (&loops
);
3154 /* Estimate using heuristics if no profiling info is available. */
3155 estimate_probability (&loops
);
3158 flow_loops_dump (&loops
, rtl_dump_file
, 0);
3160 flow_loops_free (&loops
);
3162 life_analysis (insns
, rtl_dump_file
, PROP_FINAL
);
3163 mark_constant_function ();
3164 timevar_pop (TV_FLOW
);
3166 register_life_up_to_date
= 1;
3169 if (warn_uninitialized
|| extra_warnings
)
3171 uninitialized_vars_warning (DECL_INITIAL (decl
));
3173 setjmp_args_warning ();
3176 close_dump_file (DFI_life
, print_rtl_with_bb
, insns
);
3181 /* If -opt, try combining insns through substitution. */
3185 int rebuild_jump_labels_after_combine
= 0;
3187 timevar_push (TV_COMBINE
);
3188 open_dump_file (DFI_combine
, decl
);
3190 rebuild_jump_labels_after_combine
3191 = combine_instructions (insns
, max_reg_num ());
3193 /* Combining insns may have turned an indirect jump into a
3194 direct jump. Rebuid the JUMP_LABEL fields of jumping
3196 if (rebuild_jump_labels_after_combine
)
3198 timevar_push (TV_JUMP
);
3199 rebuild_jump_labels (insns
);
3200 timevar_pop (TV_JUMP
);
3202 timevar_push (TV_FLOW
);
3203 find_basic_blocks (insns
, max_reg_num (), rtl_dump_file
);
3204 cleanup_cfg (insns
);
3206 /* Blimey. We've got to have the CFG up to date for the call to
3207 if_convert below. However, the random deletion of blocks
3208 without updating life info can wind up with Wierd Stuff in
3209 global_live_at_end. We then run sched1, which updates things
3210 properly, discovers the wierdness and aborts. */
3211 update_life_info (NULL
, UPDATE_LIFE_GLOBAL_RM_NOTES
,
3212 PROP_DEATH_NOTES
| PROP_KILL_DEAD_CODE
3213 | PROP_SCAN_DEAD_CODE
);
3215 timevar_pop (TV_FLOW
);
3218 close_dump_file (DFI_combine
, print_rtl_with_bb
, insns
);
3219 timevar_pop (TV_COMBINE
);
3225 /* Rerun if-conversion, as combine may have simplified things enough to
3226 now meet sequence length restrictions. */
3229 timevar_push (TV_IFCVT
);
3230 open_dump_file (DFI_ce
, decl
);
3236 close_dump_file (DFI_ce
, print_rtl_with_bb
, insns
);
3237 timevar_pop (TV_IFCVT
);
3240 /* Register allocation pre-pass, to reduce number of moves
3241 necessary for two-address machines. */
3242 if (optimize
> 0 && (flag_regmove
|| flag_expensive_optimizations
))
3244 timevar_push (TV_REGMOVE
);
3245 open_dump_file (DFI_regmove
, decl
);
3247 regmove_optimize (insns
, max_reg_num (), rtl_dump_file
);
3249 close_dump_file (DFI_regmove
, print_rtl_with_bb
, insns
);
3250 timevar_pop (TV_REGMOVE
);
3256 /* Any of the several passes since flow1 will have munged register
3257 lifetime data a bit. */
3259 register_life_up_to_date
= 0;
3261 #ifdef OPTIMIZE_MODE_SWITCHING
3264 timevar_push (TV_GCSE
);
3266 if (optimize_mode_switching (NULL_PTR
))
3268 /* We did work, and so had to regenerate global life information.
3269 Take advantage of this and don't re-recompute register life
3270 information below. */
3271 register_life_up_to_date
= 1;
3274 timevar_pop (TV_GCSE
);
3278 #ifdef INSN_SCHEDULING
3280 /* Print function header into sched dump now
3281 because doing the sched analysis makes some of the dump. */
3282 if (optimize
> 0 && flag_schedule_insns
)
3284 timevar_push (TV_SCHED
);
3285 open_dump_file (DFI_sched
, decl
);
3287 /* Do control and data sched analysis,
3288 and write some of the results to dump file. */
3290 schedule_insns (rtl_dump_file
);
3292 close_dump_file (DFI_sched
, print_rtl_with_bb
, insns
);
3293 timevar_pop (TV_SCHED
);
3298 /* Register lifetime information was updated as part of verifying
3300 register_life_up_to_date
= 1;
3304 /* Determine if the current function is a leaf before running reload
3305 since this can impact optimizations done by the prologue and
3306 epilogue thus changing register elimination offsets. */
3307 current_function_is_leaf
= leaf_function_p ();
3309 timevar_push (TV_LOCAL_ALLOC
);
3310 open_dump_file (DFI_lreg
, decl
);
3312 /* Allocate pseudo-regs that are used only within 1 basic block.
3314 RUN_JUMP_AFTER_RELOAD records whether or not we need to rerun the
3315 jump optimizer after register allocation and reloading are finished. */
3317 if (! register_life_up_to_date
)
3318 recompute_reg_usage (insns
, ! optimize_size
);
3319 regclass (insns
, max_reg_num (), rtl_dump_file
);
3320 rebuild_label_notes_after_reload
= local_alloc ();
3322 timevar_pop (TV_LOCAL_ALLOC
);
3324 if (dump_file
[DFI_lreg
].enabled
)
3326 timevar_push (TV_DUMP
);
3328 dump_flow_info (rtl_dump_file
);
3329 dump_local_alloc (rtl_dump_file
);
3331 close_dump_file (DFI_lreg
, print_rtl_with_bb
, insns
);
3332 timevar_pop (TV_DUMP
);
3338 timevar_push (TV_GLOBAL_ALLOC
);
3339 open_dump_file (DFI_greg
, decl
);
3341 /* If optimizing, allocate remaining pseudo-regs. Do the reload
3342 pass fixing up any insns that are invalid. */
3345 failure
= global_alloc (rtl_dump_file
);
3348 build_insn_chain (insns
);
3349 failure
= reload (insns
, 0, rtl_dump_file
);
3352 timevar_pop (TV_GLOBAL_ALLOC
);
3355 goto exit_rest_of_compilation
;
3360 /* Do a very simple CSE pass over just the hard registers. */
3363 timevar_push (TV_RELOAD_CSE_REGS
);
3364 reload_cse_regs (insns
);
3365 timevar_pop (TV_RELOAD_CSE_REGS
);
3368 /* If optimizing, then go ahead and split insns now since we are about
3369 to recompute flow information anyway. */
3371 split_all_insns (0);
3373 /* Register allocation and reloading may have turned an indirect jump into
3374 a direct jump. If so, we must rebuild the JUMP_LABEL fields of
3375 jumping instructions. */
3376 if (rebuild_label_notes_after_reload
)
3378 timevar_push (TV_JUMP
);
3380 rebuild_jump_labels (insns
);
3382 timevar_pop (TV_JUMP
);
3385 if (dump_file
[DFI_greg
].enabled
)
3387 timevar_push (TV_DUMP
);
3389 dump_global_regs (rtl_dump_file
);
3391 close_dump_file (DFI_greg
, print_rtl_with_bb
, insns
);
3392 timevar_pop (TV_DUMP
);
3395 /* Re-create the death notes which were deleted during reload. */
3396 timevar_push (TV_FLOW2
);
3397 open_dump_file (DFI_flow2
, decl
);
3399 jump_optimize (insns
, !JUMP_CROSS_JUMP
,
3400 !JUMP_NOOP_MOVES
, !JUMP_AFTER_REGSCAN
);
3401 find_basic_blocks (insns
, max_reg_num (), rtl_dump_file
);
3403 /* On some machines, the prologue and epilogue code, or parts thereof,
3404 can be represented as RTL. Doing so lets us schedule insns between
3405 it and the rest of the code and also allows delayed branch
3406 scheduling to operate in the epilogue. */
3407 thread_prologue_and_epilogue_insns (insns
);
3411 cleanup_cfg (insns
);
3412 life_analysis (insns
, rtl_dump_file
, PROP_FINAL
);
3414 /* This is kind of a heuristic. We need to run combine_stack_adjustments
3415 even for machines with possibly nonzero RETURN_POPS_ARGS
3416 and ACCUMULATE_OUTGOING_ARGS. We expect that only ports having
3417 push instructions will have popping returns. */
3418 #ifndef PUSH_ROUNDING
3419 if (!ACCUMULATE_OUTGOING_ARGS
)
3421 combine_stack_adjustments ();
3427 flow2_completed
= 1;
3429 close_dump_file (DFI_flow2
, print_rtl_with_bb
, insns
);
3430 timevar_pop (TV_FLOW2
);
3434 timevar_push (TV_IFCVT2
);
3435 open_dump_file (DFI_ce2
, decl
);
3439 close_dump_file (DFI_ce2
, print_rtl_with_bb
, insns
);
3440 timevar_pop (TV_IFCVT2
);
3443 #ifdef HAVE_peephole2
3444 if (optimize
> 0 && flag_peephole2
)
3446 timevar_push (TV_PEEPHOLE2
);
3447 open_dump_file (DFI_peephole2
, decl
);
3449 peephole2_optimize (rtl_dump_file
);
3451 close_dump_file (DFI_peephole2
, print_rtl_with_bb
, insns
);
3452 timevar_pop (TV_PEEPHOLE2
);
3456 if (optimize
> 0 && flag_rename_registers
)
3458 timevar_push (TV_RENAME_REGISTERS
);
3459 open_dump_file (DFI_rnreg
, decl
);
3461 regrename_optimize ();
3463 close_dump_file (DFI_rnreg
, print_rtl_with_bb
, insns
);
3464 timevar_pop (TV_RENAME_REGISTERS
);
3467 #ifdef INSN_SCHEDULING
3468 if (optimize
> 0 && flag_schedule_insns_after_reload
)
3470 timevar_push (TV_SCHED2
);
3471 open_dump_file (DFI_sched2
, decl
);
3473 /* Do control and data sched analysis again,
3474 and write some more of the results to dump file. */
3476 schedule_insns (rtl_dump_file
);
3478 close_dump_file (DFI_sched2
, print_rtl_with_bb
, insns
);
3479 timevar_pop (TV_SCHED2
);
3486 #ifdef LEAF_REGISTERS
3487 current_function_uses_only_leaf_regs
3488 = optimize
> 0 && only_leaf_regs_used () && leaf_function_p ();
3491 if (optimize
> 0 && flag_reorder_blocks
)
3493 timevar_push (TV_REORDER_BLOCKS
);
3494 open_dump_file (DFI_bbro
, decl
);
3496 reorder_basic_blocks ();
3498 close_dump_file (DFI_bbro
, print_rtl_with_bb
, insns
);
3499 timevar_pop (TV_REORDER_BLOCKS
);
3502 /* One more attempt to remove jumps to .+1 left by dead-store elimination.
3503 Also do cross-jumping this time and delete no-op move insns. */
3507 timevar_push (TV_JUMP
);
3508 open_dump_file (DFI_jump2
, decl
);
3510 jump_optimize (insns
, JUMP_CROSS_JUMP
, JUMP_NOOP_MOVES
,
3511 !JUMP_AFTER_REGSCAN
);
3513 /* CFG no longer kept up to date. */
3515 close_dump_file (DFI_jump2
, print_rtl_with_bb
, insns
);
3516 timevar_pop (TV_JUMP
);
3519 /* If a machine dependent reorganization is needed, call it. */
3520 #ifdef MACHINE_DEPENDENT_REORG
3521 open_dump_file (DFI_mach
, decl
);
3523 MACHINE_DEPENDENT_REORG (insns
);
3525 close_dump_file (DFI_mach
, print_rtl_with_bb
, insns
);
3531 /* If a scheduling pass for delayed branches is to be done,
3532 call the scheduling code. */
3535 if (optimize
> 0 && flag_delayed_branch
)
3537 timevar_push (TV_DBR_SCHED
);
3538 open_dump_file (DFI_dbr
, decl
);
3540 dbr_schedule (insns
, rtl_dump_file
);
3542 close_dump_file (DFI_dbr
, print_rtl_with_bb
, insns
);
3543 timevar_pop (TV_DBR_SCHED
);
3550 /* Shorten branches.
3552 Note this must run before reg-stack because of death note (ab)use
3553 in the ia32 backend. */
3554 timevar_push (TV_SHORTEN_BRANCH
);
3555 shorten_branches (get_insns ());
3556 timevar_pop (TV_SHORTEN_BRANCH
);
3559 timevar_push (TV_REG_STACK
);
3560 open_dump_file (DFI_stack
, decl
);
3562 reg_to_stack (insns
, rtl_dump_file
);
3564 close_dump_file (DFI_stack
, print_rtl_with_bb
, insns
);
3565 timevar_pop (TV_REG_STACK
);
3571 current_function_nothrow
= nothrow_function_p ();
3572 if (current_function_nothrow
)
3573 /* Now we know that this can't throw; set the flag for the benefit
3574 of other functions later in this translation unit. */
3575 TREE_NOTHROW (current_function_decl
) = 1;
3577 /* Now turn the rtl into assembler code. */
3579 timevar_push (TV_FINAL
);
3584 /* Get the function's name, as described by its RTL. This may be
3585 different from the DECL_NAME name used in the source file. */
3587 x
= DECL_RTL (decl
);
3588 if (GET_CODE (x
) != MEM
)
3591 if (GET_CODE (x
) != SYMBOL_REF
)
3593 fnname
= XSTR (x
, 0);
3595 assemble_start_function (decl
, fnname
);
3596 final_start_function (insns
, asm_out_file
, optimize
);
3597 final (insns
, asm_out_file
, optimize
, 0);
3598 final_end_function (insns
, asm_out_file
, optimize
);
3599 assemble_end_function (decl
, fnname
);
3601 fflush (asm_out_file
);
3603 /* Release all memory allocated by flow. */
3604 free_basic_block_vars (0);
3606 /* Release all memory held by regsets now */
3607 regset_release_memory ();
3609 timevar_pop (TV_FINAL
);
3614 /* Write DBX symbols if requested */
3616 /* Note that for those inline functions where we don't initially
3617 know for certain that we will be generating an out-of-line copy,
3618 the first invocation of this routine (rest_of_compilation) will
3619 skip over this code by doing a `goto exit_rest_of_compilation;'.
3620 Later on, finish_compilation will call rest_of_compilation again
3621 for those inline functions that need to have out-of-line copies
3622 generated. During that call, we *will* be routed past here. */
3624 timevar_push (TV_SYMOUT
);
3625 #ifdef DBX_DEBUGGING_INFO
3626 if (write_symbols
== DBX_DEBUG
)
3627 dbxout_function (decl
);
3630 #ifdef DWARF_DEBUGGING_INFO
3631 if (write_symbols
== DWARF_DEBUG
)
3632 dwarfout_file_scope_decl (decl
, 0);
3635 #ifdef DWARF2_DEBUGGING_INFO
3636 if (write_symbols
== DWARF2_DEBUG
)
3637 dwarf2out_decl (decl
);
3639 timevar_pop (TV_SYMOUT
);
3641 exit_rest_of_compilation
:
3643 /* In case the function was not output,
3644 don't leave any temporary anonymous types
3645 queued up for sdb output. */
3646 #ifdef SDB_DEBUGGING_INFO
3647 if (write_symbols
== SDB_DEBUG
)
3648 sdbout_types (NULL_TREE
);
3651 reload_completed
= 0;
3652 flow2_completed
= 0;
3655 timevar_push (TV_FINAL
);
3657 /* Clear out the insn_length contents now that they are no
3659 init_insn_lengths ();
3661 /* Clear out the real_constant_chain before some of the rtx's
3662 it runs through become garbage. */
3663 clear_const_double_mem ();
3665 /* Cancel the effect of rtl_in_current_obstack. */
3666 resume_temporary_allocation ();
3668 /* Show no temporary slots allocated. */
3671 free_basic_block_vars (0);
3673 timevar_pop (TV_FINAL
);
3675 /* Make sure volatile mem refs aren't considered valid operands for
3676 arithmetic insns. We must call this here if this is a nested inline
3677 function, since the above code leaves us in the init_recog state
3678 (from final.c), and the function context push/pop code does not
3679 save/restore volatile_ok.
3681 ??? Maybe it isn't necessary for expand_start_function to call this
3682 anymore if we do it here? */
3684 init_recog_no_volatile ();
3686 /* We're done with this function. Free up memory if we can. */
3687 free_after_parsing (cfun
);
3688 if (! DECL_DEFER_OUTPUT (decl
))
3689 free_after_compilation (cfun
);
3695 timevar_pop (TV_REST_OF_COMPILATION
);
3706 printf (_("Usage: %s input [switches]\n"), progname
);
3707 printf (_("Switches:\n"));
3709 printf (_(" -ffixed-<register> Mark <register> as being unavailable to the compiler\n"));
3710 printf (_(" -fcall-used-<register> Mark <register> as being corrupted by function calls\n"));
3711 printf (_(" -fcall-saved-<register> Mark <register> as being preserved across functions\n"));
3712 printf (_(" -finline-limit=<number> Limits the size of inlined functions to <number>\n"));
3713 printf (_(" -fmessage-length=<number> Limits diagnostics messages lengths to <number> characters per line. 0 suppresses line-wrapping\n"));
3714 printf (_(" -fdiagnostics-show-location=[once | never] Indicates how often source location information should be emitted, as prefix, at the beginning of diagnostics when line-wrapping\n"));
3716 for (i
= NUM_ELEM (f_options
); i
--;)
3718 const char * description
= f_options
[i
].description
;
3720 if (description
!= NULL
&& * description
!= 0)
3721 printf (" -f%-21s %s\n",
3722 f_options
[i
].string
, description
);
3725 printf (_(" -O[number] Set optimisation level to [number]\n"));
3726 printf (_(" -Os Optimise for space rather than speed\n"));
3727 printf (_(" -pedantic Issue warnings needed by strict compliance to ANSI C\n"));
3728 printf (_(" -pedantic-errors Like -pedantic except that errors are produced\n"));
3729 printf (_(" -w Suppress warnings\n"));
3730 printf (_(" -W Enable extra warnings\n"));
3732 for (i
= NUM_ELEM (W_options
); i
--;)
3734 const char * description
= W_options
[i
].description
;
3736 if (description
!= NULL
&& * description
!= 0)
3737 printf (" -W%-21s %s\n",
3738 W_options
[i
].string
, description
);
3741 printf (_(" -Wunused Enable unused warnings\n"));
3742 printf (_(" -Wid-clash-<num> Warn if 2 identifiers have the same first <num> chars\n"));
3743 printf (_(" -Wlarger-than-<number> Warn if an object is larger than <number> bytes\n"));
3744 printf (_(" -p Enable function profiling\n"));
3745 #if defined (BLOCK_PROFILER) || defined (FUNCTION_BLOCK_PROFILER)
3746 printf (_(" -a Enable block profiling \n"));
3748 #if defined (BLOCK_PROFILER) || defined (FUNCTION_BLOCK_PROFILER) || defined FUNCTION_BLOCK_PROFILER_EXIT
3749 printf (_(" -ax Enable jump profiling \n"));
3751 printf (_(" -o <file> Place output into <file> \n"));
3753 -G <number> Put global and static data smaller than <number>\n\
3754 bytes into a special section (on some targets)\n"));
3756 for (i
= NUM_ELEM (debug_args
); i
--;)
3758 if (debug_args
[i
].description
!= NULL
)
3759 printf (" -g%-21s %s\n", debug_args
[i
].arg
, debug_args
[i
].description
);
3762 printf (_(" -aux-info <file> Emit declaration info into <file>.X\n"));
3763 printf (_(" -quiet Do not display functions compiled or elapsed time\n"));
3764 printf (_(" -version Display the compiler's version\n"));
3765 printf (_(" -d[letters] Enable dumps from specific passes of the compiler\n"));
3766 printf (_(" -dumpbase <file> Base name to be used for dumps from specific passes\n"));
3767 #if defined INSN_SCHEDULING
3768 printf (_(" -fsched-verbose=<number> Set the verbosity level of the scheduler\n"));
3770 printf (_(" --help Display this information\n"));
3775 /* Display descriptions of language specific options.
3776 If there is no description, note that there is an undocumented option.
3777 If the description is empty, do not display anything. (This allows
3778 options to be deliberately undocumented, for whatever reason).
3779 If the option string is missing, then this is a marker, indicating
3780 that the description string is in fact the name of a language, whose
3781 language specific options are to follow. */
3783 if (NUM_ELEM (documented_lang_options
) > 1)
3785 printf (_("\nLanguage specific options:\n"));
3787 for (i
= 0; i
< NUM_ELEM (documented_lang_options
); i
++)
3789 const char * description
= documented_lang_options
[i
].description
;
3790 const char * option
= documented_lang_options
[i
].option
;
3792 if (description
== NULL
)
3797 printf (_(" %-23.23s [undocumented]\n"), option
);
3799 else if (* description
== 0)
3801 else if (option
== NULL
)
3805 (_("\nThere are undocumented %s specific options as well.\n"),
3809 printf (_("\n Options for %s:\n"), description
);
3814 printf (" %-23.23s %s\n", option
, description
);
3819 printf (_("\nThere are undocumented %s specific options as well.\n"), lang
);
3821 if (NUM_ELEM (target_switches
) > 1
3822 #ifdef TARGET_OPTIONS
3823 || NUM_ELEM (target_options
) > 1
3831 printf (_("\nTarget specific options:\n"));
3833 for (i
= NUM_ELEM (target_switches
); i
--;)
3835 const char * option
= target_switches
[i
].name
;
3836 const char * description
= target_switches
[i
].description
;
3838 if (option
== NULL
|| * option
== 0)
3840 else if (description
== NULL
)
3845 printf (_(" -m%-21.21s [undocumented]\n"), option
);
3847 else if (* description
!= 0)
3848 doc
+= printf (" -m%-21.21s %s\n", option
, description
);
3851 #ifdef TARGET_OPTIONS
3852 for (i
= NUM_ELEM (target_options
); i
--;)
3854 const char * option
= target_options
[i
].prefix
;
3855 const char * description
= target_options
[i
].description
;
3857 if (option
== NULL
|| * option
== 0)
3859 else if (description
== NULL
)
3864 printf (_(" -m%-21.21s [undocumented]\n"), option
);
3866 else if (* description
!= 0)
3867 doc
+= printf (" -m%-21.21s %s\n", option
, description
);
3873 printf (_("\nThere are undocumented target specific options as well.\n"));
3875 printf (_(" They exist, but they are not documented.\n"));
3880 /* Parse a -d... comand line switch. */
3883 decode_d_option (arg
)
3892 for (i
= 0; i
< DFI_MAX
; ++i
)
3893 dump_file
[i
].enabled
= 1;
3902 flag_print_asm_name
= 1;
3905 graph_dump_format
= vcg
;
3908 rtl_dump_and_exit
= 1;
3913 case 'D': /* These are handled by the preprocessor. */
3919 for (i
= 0; i
< DFI_MAX
; ++i
)
3920 if (c
== dump_file
[i
].debug_switch
)
3922 dump_file
[i
].enabled
= 1;
3927 warning ("unrecognized gcc debugging option: %c", c
);
3932 /* Parse a -f... comand line switch. ARG is the value after the -f.
3933 It is safe to access 'ARG - 2' to generate the full switch name.
3934 Return the number of strings consumed. */
3937 decode_f_option (arg
)
3941 const char *option_value
= NULL
;
3943 /* Search for the option in the table of binary f options. */
3944 for (j
= sizeof (f_options
) / sizeof (f_options
[0]); j
--;)
3946 if (!strcmp (arg
, f_options
[j
].string
))
3948 *f_options
[j
].variable
= f_options
[j
].on_value
;
3952 if (arg
[0] == 'n' && arg
[1] == 'o' && arg
[2] == '-'
3953 && ! strcmp (arg
+ 3, f_options
[j
].string
))
3955 *f_options
[j
].variable
= ! f_options
[j
].on_value
;
3960 if ((option_value
= skip_leading_substring (arg
, "inline-limit-"))
3961 || (option_value
= skip_leading_substring (arg
, "inline-limit=")))
3963 read_integral_parameter (option_value
, arg
- 2, inline_max_insns
);
3964 #ifdef INSN_SCHEDULING
3965 else if ((option_value
= skip_leading_substring (arg
, "sched-verbose=")))
3966 fix_sched_param ("verbose", option_value
);
3968 else if ((option_value
= skip_leading_substring (arg
, "fixed-")))
3969 fix_register (option_value
, 1, 1);
3970 else if ((option_value
= skip_leading_substring (arg
, "call-used-")))
3971 fix_register (option_value
, 0, 1);
3972 else if ((option_value
= skip_leading_substring (arg
, "call-saved-")))
3973 fix_register (option_value
, 0, 0);
3974 else if ((option_value
= skip_leading_substring (arg
, "align-loops=")))
3975 align_loops
= read_integral_parameter (option_value
, arg
- 2, align_loops
);
3976 else if ((option_value
= skip_leading_substring (arg
, "align-functions=")))
3978 = read_integral_parameter (option_value
, arg
- 2, align_functions
);
3979 else if ((option_value
= skip_leading_substring (arg
, "align-jumps=")))
3980 align_jumps
= read_integral_parameter (option_value
, arg
- 2, align_jumps
);
3981 else if ((option_value
= skip_leading_substring (arg
, "align-labels=")))
3983 = read_integral_parameter (option_value
, arg
- 2, align_labels
);
3984 else if ((option_value
3985 = skip_leading_substring (arg
, "stack-limit-register=")))
3987 int reg
= decode_reg_name (option_value
);
3989 error ("unrecognized register name `%s'", option_value
);
3991 stack_limit_rtx
= gen_rtx_REG (Pmode
, reg
);
3993 else if ((option_value
3994 = skip_leading_substring (arg
, "stack-limit-symbol=")))
3998 nm
= ggc_alloc_string (option_value
, strlen (option_value
));
4000 nm
= xstrdup (option_value
);
4001 stack_limit_rtx
= gen_rtx_SYMBOL_REF (Pmode
, nm
);
4003 else if ((option_value
4004 = skip_leading_substring (arg
, "message-length=")))
4005 diagnostic_message_length_per_line
=
4006 read_integral_parameter (option_value
, arg
- 2,
4007 diagnostic_message_length_per_line
);
4008 else if ((option_value
4009 = skip_leading_substring (arg
, "diagnostics-show-location=")))
4011 if (!strcmp (option_value
, "once"))
4012 set_message_prefixing_rule (DIAGNOSTICS_SHOW_PREFIX_ONCE
);
4013 else if (!strcmp (option_value
, "every-line"))
4014 set_message_prefixing_rule (DIAGNOSTICS_SHOW_PREFIX_EVERY_LINE
);
4016 error ("Unrecognized option `%s'", arg
- 2);
4018 else if (!strcmp (arg
, "no-stack-limit"))
4019 stack_limit_rtx
= NULL_RTX
;
4020 else if (!strcmp (arg
, "preprocessed"))
4021 /* Recognise this switch but do nothing. This prevents warnings
4022 about an unrecognized switch if cpplib has not been linked in. */
4030 /* Parse a -W... comand line switch. ARG is the value after the -W.
4031 It is safe to access 'ARG - 2' to generate the full switch name.
4032 Return the number of strings consumed. */
4035 decode_W_option (arg
)
4038 const char *option_value
= NULL
;
4041 /* Search for the option in the table of binary W options. */
4043 for (j
= sizeof (W_options
) / sizeof (W_options
[0]); j
--;)
4045 if (!strcmp (arg
, W_options
[j
].string
))
4047 *W_options
[j
].variable
= W_options
[j
].on_value
;
4051 if (arg
[0] == 'n' && arg
[1] == 'o' && arg
[2] == '-'
4052 && ! strcmp (arg
+ 3, W_options
[j
].string
))
4054 *W_options
[j
].variable
= ! W_options
[j
].on_value
;
4059 if ((option_value
= skip_leading_substring (arg
, "id-clash-")))
4061 id_clash_len
= read_integral_parameter (option_value
, arg
- 2, -1);
4063 if (id_clash_len
!= -1)
4066 else if ((option_value
= skip_leading_substring (arg
, "larger-than-")))
4068 larger_than_size
= read_integral_parameter (option_value
, arg
- 2, -1);
4070 if (larger_than_size
!= -1)
4071 warn_larger_than
= 1;
4073 else if (!strcmp (arg
, "unused"))
4077 else if (!strcmp (arg
, "no-unused"))
4087 /* Parse a -g... comand line switch. ARG is the value after the -g.
4088 It is safe to access 'ARG - 2' to generate the full switch name.
4089 Return the number of strings consumed. */
4092 decode_g_option (arg
)
4096 /* A lot of code assumes write_symbols == NO_DEBUG if the
4097 debugging level is 0 (thus -gstabs1 -gstabs0 would lose track
4098 of what debugging type has been selected). This records the
4099 selected type. It is an error to specify more than one
4101 static enum debug_info_type selected_debug_type
= NO_DEBUG
;
4102 /* Non-zero if debugging format has been explicitly set.
4103 -g and -ggdb don't explicitly set the debugging format so
4104 -gdwarf -g3 is equivalent to -gdwarf3. */
4105 static int type_explicitly_set_p
= 0;
4106 /* Indexed by enum debug_info_type. */
4107 static const char * debug_type_names
[] =
4109 "none", "stabs", "coff", "dwarf-1", "dwarf-2", "xcoff"
4112 /* The maximum admissible debug level value. */
4113 static const unsigned max_debug_level
= 3;
4115 /* Look up ARG in the table. */
4116 for (da
= debug_args
; da
->arg
; da
++)
4118 const int da_len
= strlen (da
->arg
);
4120 if (da_len
== 0 || ! strncmp (arg
, da
->arg
, da_len
))
4122 enum debug_info_type type
= da
->debug_type
;
4123 const char * p
= arg
+ da_len
;
4125 if (*p
&& (*p
< '0' || *p
> '9'))
4128 /* A debug flag without a level defaults to level 2.
4129 Note we do not want to call read_integral_parameter
4130 for that case since it will call atoi which
4133 ??? We may want to generalize the interface to
4134 read_integral_parameter to better handle this case
4135 if this case shows up often. */
4137 level
= read_integral_parameter (p
, 0, max_debug_level
+ 1);
4141 if (da_len
> 1 && *p
&& !strncmp (arg
, "dwarf", da_len
))
4143 error ("use -gdwarf -g%d for DWARF v1, level %d",
4146 error ("use -gdwarf-2 for DWARF v2");
4149 if (level
> max_debug_level
)
4152 ignoring option `%s' due to invalid debug level specification",
4154 level
= debug_info_level
;
4157 if (type
== NO_DEBUG
)
4159 type
= PREFERRED_DEBUGGING_TYPE
;
4161 if (da_len
> 1 && strncmp (arg
, "gdb", da_len
) == 0)
4163 #if defined (DWARF2_DEBUGGING_INFO) && !defined (LINKER_DOES_NOT_WORK_WITH_DWARF2)
4164 type
= DWARF2_DEBUG
;
4166 #ifdef DBX_DEBUGGING_INFO
4173 if (type
== NO_DEBUG
)
4174 warning ("`%s': unknown or unsupported -g option", arg
- 2);
4176 /* Does it conflict with an already selected type? */
4177 if (type_explicitly_set_p
4178 /* -g/-ggdb don't conflict with anything */
4179 && da
->debug_type
!= NO_DEBUG
4180 && type
!= selected_debug_type
)
4181 warning ("`%s' ignored, conflicts with `-g%s'",
4182 arg
- 2, debug_type_names
[(int) selected_debug_type
]);
4185 /* If the format has already been set, -g/-ggdb
4186 only change the debug level. */
4187 if (type_explicitly_set_p
&& da
->debug_type
== NO_DEBUG
)
4188 ; /* don't change debugging type */
4191 selected_debug_type
= type
;
4192 type_explicitly_set_p
= da
->debug_type
!= NO_DEBUG
;
4195 write_symbols
= (level
== 0
4197 : selected_debug_type
);
4198 use_gnu_debug_info_extensions
= da
->use_extensions_p
;
4199 debug_info_level
= (enum debug_info_level
) level
;
4207 warning ("`%s': unknown or unsupported -g option", arg
- 2);
4212 /* Decode the first argument in the argv as a language-independent option.
4213 Return the number of strings consumed. 'strings_processed' is the
4214 number of strings that have already been decoded in a language
4215 specific fashion before this function was invoked. */
4218 independent_decode_option (argc
, argv
, strings_processed
)
4221 unsigned int strings_processed
;
4223 char *arg
= argv
[0];
4225 if (arg
[0] != '-' || arg
[1] == 0)
4237 if (!strcmp (arg
, "-help"))
4252 /* Already been treated in main (). Do nothing. */
4256 set_target_switch (arg
+ 1);
4260 return decode_f_option (arg
+ 1);
4263 if (strings_processed
== 0)
4264 return decode_g_option (arg
+ 1);
4266 return strings_processed
;
4269 if (!strcmp (arg
, "dumpbase"))
4274 dump_base_name
= argv
[1];
4278 decode_d_option (arg
+ 1);
4282 if (!strcmp (arg
, "pedantic"))
4284 else if (!strcmp (arg
, "pedantic-errors"))
4285 flag_pedantic_errors
= pedantic
= 1;
4286 else if (arg
[1] == 0)
4293 if (!strcmp (arg
, "quiet"))
4300 if (!strcmp (arg
, "version"))
4308 inhibit_warnings
= 1;
4317 /* We save the value of warn_uninitialized, since if they put
4318 -Wuninitialized on the command line, we need to generate a
4319 warning about not using it without also specifying -O. */
4320 if (warn_uninitialized
!= 1)
4321 warn_uninitialized
= 2;
4324 return decode_W_option (arg
+ 1);
4330 #if !defined (BLOCK_PROFILER) || !defined (FUNCTION_BLOCK_PROFILER)
4331 warning ("`-a' option (basic block profile) not supported");
4333 profile_block_flag
= (profile_block_flag
< 2) ? 1 : 3;
4336 else if (!strcmp (arg
, "ax"))
4338 #if !defined (FUNCTION_BLOCK_PROFILER_EXIT) || !defined (BLOCK_PROFILER) || !defined (FUNCTION_BLOCK_PROFILER)
4339 warning ("`-ax' option (jump profiling) not supported");
4341 profile_block_flag
= (!profile_block_flag
4342 || profile_block_flag
== 2) ? 2 : 3;
4345 else if (!strncmp (arg
, "aux-info", 8))
4347 flag_gen_aux_info
= 1;
4353 aux_info_file_name
= argv
[1];
4357 aux_info_file_name
= arg
+ 8;
4369 asm_file_name
= argv
[1];
4384 g_switch_val
= read_integral_parameter (argv
[1], 0, -1);
4389 g_switch_val
= read_integral_parameter (arg
+ 1, 0, -1);
4393 if (g_switch_val
== -1)
4397 g_switch_set
= TRUE
;
4398 g_switch_value
= g_switch_val
;
4408 /* Entry point of cc1/c++. Decode command args, then call compile_file.
4409 Exit code is 35 if can't open files, 34 if fatal error,
4410 33 if had nonfatal errors, else success. */
4412 extern int main
PARAMS ((int, char **));
4422 /* save in case md file wants to emit args as a comment. */
4426 p
= argv
[0] + strlen (argv
[0]);
4427 while (p
!= argv
[0] && !IS_DIR_SEPARATOR (p
[-1]))
4431 #ifdef HAVE_LC_MESSAGES
4432 setlocale (LC_MESSAGES
, "");
4434 (void) bindtextdomain (PACKAGE
, localedir
);
4435 (void) textdomain (PACKAGE
);
4437 /* Install handler for SIGFPE, which may be received while we do
4438 compile-time floating point arithmetic. */
4439 signal (SIGFPE
, float_signal
);
4441 /* Trap fatal signals, e.g. SIGSEGV, and convert them to ICE messages. */
4443 signal (SIGSEGV
, crash_signal
);
4446 signal (SIGILL
, crash_signal
);
4449 signal (SIGBUS
, crash_signal
);
4452 signal (SIGABRT
, crash_signal
);
4454 #if defined SIGIOT && (!defined SIGABRT || SIGABRT != SIGIOT)
4455 signal (SIGIOT
, crash_signal
);
4458 decl_printable_name
= decl_name
;
4459 lang_expand_expr
= (lang_expand_expr_t
) do_abort
;
4461 /* Initialize whether `char' is signed. */
4462 flag_signed_char
= DEFAULT_SIGNED_CHAR
;
4463 #ifdef DEFAULT_SHORT_ENUMS
4464 /* Initialize how much space enums occupy, by default. */
4465 flag_short_enums
= DEFAULT_SHORT_ENUMS
;
4468 /* Initialize the garbage-collector. */
4470 ggc_add_root (&input_file_stack
, 1, sizeof input_file_stack
,
4472 ggc_add_rtx_root (&stack_limit_rtx
, 1);
4473 ggc_add_tree_root (¤t_function_decl
, 1);
4474 ggc_add_tree_root (¤t_function_func_begin_label
, 1);
4476 /* Initialize the diagnostics reporting machinery. */
4477 initialize_diagnostics();
4479 /* Perform language-specific options intialization. */
4480 lang_init_options ();
4482 /* Scan to see what optimization level has been specified. That will
4483 determine the default value of many flags. */
4484 for (i
= 1; i
< argc
; i
++)
4486 if (!strcmp (argv
[i
], "-O"))
4491 else if (argv
[i
][0] == '-' && argv
[i
][1] == 'O')
4493 /* Handle -Os, -O2, -O3, -O69, ... */
4494 char *p
= &argv
[i
][2];
4496 if ((p
[0] == 's') && (p
[1] == 0))
4500 /* Optimizing for size forces optimize to be 2. */
4505 const int optimize_val
= read_integral_parameter (p
, p
- 2, -1);
4506 if (optimize_val
!= -1)
4508 optimize
= optimize_val
;
4518 flag_thread_jumps
= 1;
4520 flag_delayed_branch
= 1;
4522 #ifdef CAN_DEBUG_WITHOUT_FP
4523 flag_omit_frame_pointer
= 1;
4529 flag_optimize_sibling_calls
= 1;
4530 flag_cse_follow_jumps
= 1;
4531 flag_cse_skip_blocks
= 1;
4533 flag_expensive_optimizations
= 1;
4534 flag_strength_reduce
= 1;
4535 flag_rerun_cse_after_loop
= 1;
4536 flag_rerun_loop_opt
= 1;
4537 flag_caller_saves
= 1;
4540 #ifdef INSN_SCHEDULING
4541 flag_schedule_insns
= 1;
4542 flag_schedule_insns_after_reload
= 1;
4545 flag_strict_aliasing
= 1;
4546 flag_delete_null_pointer_checks
= 1;
4551 flag_inline_functions
= 1;
4554 if (optimize
< 2 || optimize_size
)
4559 align_functions
= 1;
4562 /* Initialize target_flags before OPTIMIZATION_OPTIONS so the latter can
4565 set_target_switch ("");
4567 /* Unwind tables are always present in an ABI-conformant IA-64
4568 object file, so the default should be ON. */
4569 #ifdef IA64_UNWIND_INFO
4570 flag_unwind_tables
= IA64_UNWIND_INFO
;
4573 #ifdef OPTIMIZATION_OPTIONS
4574 /* Allow default optimizations to be specified on a per-machine basis. */
4575 OPTIMIZATION_OPTIONS (optimize
, optimize_size
);
4578 /* Initialize register usage now so switches may override. */
4581 /* Perform normal command line switch decoding. */
4582 for (i
= 1; i
< argc
;)
4584 unsigned int lang_processed
;
4585 unsigned int indep_processed
;
4587 /* Give the language a chance to decode the option for itself. */
4588 lang_processed
= lang_decode_option (argc
- i
, argv
+ i
);
4590 /* Now see if the option also has a language independent meaning.
4591 Some options are both language specific and language independent,
4592 eg --help. It is possible that there might be options that should
4593 only be decoded in a language independent way if they were not
4594 decoded in a language specific way, which is why 'lang_processed'
4596 indep_processed
= independent_decode_option (argc
- i
, argv
+ i
,
4599 if (lang_processed
|| indep_processed
)
4600 i
+= (lang_processed
> indep_processed
4601 ? lang_processed
: indep_processed
);
4604 const char * option
= NULL
;
4605 const char * lang
= NULL
;
4608 /* It is possible that the command line switch is not valid for the
4609 current language, but it is valid for another language. In order
4610 to be compatible with previous versions of the compiler (which
4611 did not issue an error message in this case) we check for this
4612 possibility here. If we do find a match, then if extra_warnings
4613 is set we generate a warning message, otherwise we will just
4614 ignore the option. */
4615 for (j
= 0; j
< NUM_ELEM (documented_lang_options
); j
++)
4617 option
= documented_lang_options
[j
].option
;
4620 lang
= documented_lang_options
[j
].description
;
4621 else if (! strncmp (argv
[i
], option
, strlen (option
)))
4625 if (j
!= NUM_ELEM (documented_lang_options
))
4629 warning ("Ignoring command line option '%s'", argv
[i
]);
4632 (It is valid for %s but not the selected language)", lang
);
4636 error ("Unrecognized option `%s'", argv
[i
]);
4642 /* Reflect any language-specific diagnostic option setting. */
4643 reshape_diagnostic_buffer ();
4645 /* Checker uses the frame pointer. */
4646 if (flag_check_memory_usage
)
4647 flag_omit_frame_pointer
= 0;
4651 /* Inlining does not work if not optimizing,
4652 so force it not to be done. */
4656 /* The c_decode_option and lang_decode_option functions set
4657 this to `2' if -Wall is used, so we can avoid giving out
4658 lots of errors for people who don't realize what -Wall does. */
4659 if (warn_uninitialized
== 1)
4660 warning ("-Wuninitialized is not supported without -O");
4663 #ifdef OVERRIDE_OPTIONS
4664 /* Some machines may reject certain combinations of options. */
4668 if (exceptions_via_longjmp
== 2)
4670 #ifdef DWARF2_UNWIND_INFO
4671 exceptions_via_longjmp
= ! DWARF2_UNWIND_INFO
;
4673 #ifdef IA64_UNWIND_INFO
4674 exceptions_via_longjmp
= ! IA64_UNWIND_INFO
;
4676 exceptions_via_longjmp
= 1;
4681 /* Since each function gets its own handler data, we can't support the
4682 new model currently, since it depend on a specific rethrow label
4683 which is declared at the front of the table, and we can only
4684 have one such symbol in a file. */
4685 #ifdef IA64_UNWIND_INFO
4686 flag_new_exceptions
= 0;
4689 /* Set up the align_*_log variables, defaulting them to 1 if they
4690 were still unset. */
4691 if (align_loops
<= 0) align_loops
= 1;
4692 align_loops_log
= floor_log2 (align_loops
*2-1);
4693 if (align_jumps
<= 0) align_jumps
= 1;
4694 align_jumps_log
= floor_log2 (align_jumps
*2-1);
4695 if (align_labels
<= 0) align_labels
= 1;
4696 align_labels_log
= floor_log2 (align_labels
*2-1);
4697 if (align_functions
<= 0) align_functions
= 1;
4698 align_functions_log
= floor_log2 (align_functions
*2-1);
4700 if (profile_block_flag
== 3)
4702 warning ("`-ax' and `-a' are conflicting options. `-a' ignored.");
4703 profile_block_flag
= 2;
4706 /* Unrolling all loops implies that standard loop unrolling must also
4708 if (flag_unroll_all_loops
)
4709 flag_unroll_loops
= 1;
4710 /* Loop unrolling requires that strength_reduction be on also. Silently
4711 turn on strength reduction here if it isn't already on. Also, the loop
4712 unrolling code assumes that cse will be run after loop, so that must
4713 be turned on also. */
4714 if (flag_unroll_loops
)
4716 flag_strength_reduce
= 1;
4717 flag_rerun_cse_after_loop
= 1;
4720 /* Warn about options that are not supported on this machine. */
4721 #ifndef INSN_SCHEDULING
4722 if (flag_schedule_insns
|| flag_schedule_insns_after_reload
)
4723 warning ("instruction scheduling not supported on this target machine");
4726 if (flag_delayed_branch
)
4727 warning ("this target machine does not have delayed branches");
4730 user_label_prefix
= USER_LABEL_PREFIX
;
4731 if (flag_leading_underscore
!= -1)
4733 /* If the default prefix is more complicated than "" or "_",
4734 issue a warning and ignore this option. */
4735 if (user_label_prefix
[0] == 0 ||
4736 (user_label_prefix
[0] == '_' && user_label_prefix
[1] == 0))
4738 user_label_prefix
= flag_leading_underscore
? "_" : "";
4741 warning ("-f%sleading-underscore not supported on this target machine",
4742 flag_leading_underscore
? "" : "no-");
4745 /* If we are in verbose mode, write out the version and maybe all the
4746 option flags in use. */
4749 print_version (stderr
, "");
4751 print_switch_values (stderr
, 0, MAX_LINE
, "", " ", "\n");
4754 compile_file (filename
);
4756 #if !defined(OS2) && !defined(VMS) && (!defined(_WIN32) || defined (__CYGWIN__)) && !defined(__INTERIX)
4759 char *lim
= (char *) sbrk (0);
4761 fnotice (stderr
, "Data size %ld.\n", (long) (lim
- (char *) &environ
));
4766 system ("ps -l 1>&2");
4769 #endif /* not USG */
4772 #endif /* ! OS2 && ! VMS && (! _WIN32 || CYGWIN) && ! __INTERIX */
4775 return (FATAL_EXIT_CODE
);
4777 return (FATAL_EXIT_CODE
);
4778 return (SUCCESS_EXIT_CODE
);
4781 /* Decode -m switches. */
4782 /* Decode the switch -mNAME. */
4785 set_target_switch (name
)
4789 int valid_target_option
= 0;
4791 for (j
= 0; j
< sizeof target_switches
/ sizeof target_switches
[0]; j
++)
4792 if (!strcmp (target_switches
[j
].name
, name
))
4794 if (target_switches
[j
].value
< 0)
4795 target_flags
&= ~-target_switches
[j
].value
;
4797 target_flags
|= target_switches
[j
].value
;
4798 valid_target_option
= 1;
4801 #ifdef TARGET_OPTIONS
4802 if (!valid_target_option
)
4803 for (j
= 0; j
< sizeof target_options
/ sizeof target_options
[0]; j
++)
4805 int len
= strlen (target_options
[j
].prefix
);
4806 if (!strncmp (target_options
[j
].prefix
, name
, len
))
4808 *target_options
[j
].variable
= name
+ len
;
4809 valid_target_option
= 1;
4814 if (!valid_target_option
)
4815 error ("Invalid option `%s'", name
);
4818 /* Print version information to FILE.
4819 Each line begins with INDENT (for the case where FILE is the
4820 assembler output file). */
4823 print_version (file
, indent
)
4828 #define __VERSION__ "[?]"
4832 "%s%s%s version %s (%s) compiled by GNU C version %s.\n"
4834 "%s%s%s version %s (%s) compiled by CC.\n"
4836 , indent
, *indent
!= 0 ? " " : "",
4837 language_string
, version_string
, TARGET_NAME
, __VERSION__
);
4840 /* Print an option value and return the adjusted position in the line.
4841 ??? We don't handle error returns from fprintf (disk full); presumably
4842 other code will catch a disk full though. */
4845 print_single_switch (file
, pos
, max
, indent
, sep
, term
, type
, name
)
4848 const char *indent
, *sep
, *term
, *type
, *name
;
4850 /* The ultrix fprintf returns 0 on success, so compute the result we want
4851 here since we need it for the following test. */
4852 int len
= strlen (sep
) + strlen (type
) + strlen (name
);
4857 fprintf (file
, "%s", term
);
4862 fprintf (file
, "%s", indent
);
4863 pos
= strlen (indent
);
4865 fprintf (file
, "%s%s%s", sep
, type
, name
);
4870 /* Print active target switches to FILE.
4871 POS is the current cursor position and MAX is the size of a "line".
4872 Each line begins with INDENT and ends with TERM.
4873 Each switch is separated from the next by SEP. */
4876 print_switch_values (file
, pos
, max
, indent
, sep
, term
)
4879 const char *indent
, *sep
, *term
;
4884 /* Print the options as passed. */
4886 pos
= print_single_switch (file
, pos
, max
, indent
, *indent
? " " : "", term
,
4887 _("options passed: "), "");
4889 for (p
= &save_argv
[1]; *p
!= NULL
; p
++)
4893 if (strcmp (*p
, "-o") == 0)
4899 if (strcmp (*p
, "-quiet") == 0)
4901 if (strcmp (*p
, "-version") == 0)
4906 pos
= print_single_switch (file
, pos
, max
, indent
, sep
, term
, *p
, "");
4909 fprintf (file
, "%s", term
);
4911 /* Print the -f and -m options that have been enabled.
4912 We don't handle language specific options but printing argv
4915 pos
= print_single_switch (file
, 0, max
, indent
, *indent
? " " : "", term
,
4916 _("options enabled: "), "");
4918 for (j
= 0; j
< sizeof f_options
/ sizeof f_options
[0]; j
++)
4919 if (*f_options
[j
].variable
== f_options
[j
].on_value
)
4920 pos
= print_single_switch (file
, pos
, max
, indent
, sep
, term
,
4921 "-f", f_options
[j
].string
);
4923 /* Print target specific options. */
4925 for (j
= 0; j
< sizeof target_switches
/ sizeof target_switches
[0]; j
++)
4926 if (target_switches
[j
].name
[0] != '\0'
4927 && target_switches
[j
].value
> 0
4928 && ((target_switches
[j
].value
& target_flags
)
4929 == target_switches
[j
].value
))
4931 pos
= print_single_switch (file
, pos
, max
, indent
, sep
, term
,
4932 "-m", target_switches
[j
].name
);
4935 #ifdef TARGET_OPTIONS
4936 for (j
= 0; j
< sizeof target_options
/ sizeof target_options
[0]; j
++)
4937 if (*target_options
[j
].variable
!= NULL
)
4940 sprintf (prefix
, "-m%s", target_options
[j
].prefix
);
4941 pos
= print_single_switch (file
, pos
, max
, indent
, sep
, term
,
4942 prefix
, *target_options
[j
].variable
);
4946 fprintf (file
, "%s", term
);
4949 /* Record the beginning of a new source file, named FILENAME. */
4952 debug_start_source_file (filename
)
4953 register const char *filename ATTRIBUTE_UNUSED
;
4955 #ifdef DBX_DEBUGGING_INFO
4956 if (write_symbols
== DBX_DEBUG
)
4957 dbxout_start_new_source_file (filename
);
4959 #ifdef DWARF_DEBUGGING_INFO
4960 if (debug_info_level
== DINFO_LEVEL_VERBOSE
4961 && write_symbols
== DWARF_DEBUG
)
4962 dwarfout_start_new_source_file (filename
);
4963 #endif /* DWARF_DEBUGGING_INFO */
4964 #ifdef DWARF2_DEBUGGING_INFO
4965 if (debug_info_level
== DINFO_LEVEL_VERBOSE
4966 && write_symbols
== DWARF2_DEBUG
)
4967 dwarf2out_start_source_file (filename
);
4968 #endif /* DWARF2_DEBUGGING_INFO */
4969 #ifdef SDB_DEBUGGING_INFO
4970 if (write_symbols
== SDB_DEBUG
)
4971 sdbout_start_new_source_file (filename
);
4975 /* Record the resumption of a source file. LINENO is the line number in
4976 the source file we are returning to. */
4979 debug_end_source_file (lineno
)
4980 register unsigned lineno ATTRIBUTE_UNUSED
;
4982 #ifdef DBX_DEBUGGING_INFO
4983 if (write_symbols
== DBX_DEBUG
)
4984 dbxout_resume_previous_source_file ();
4986 #ifdef DWARF_DEBUGGING_INFO
4987 if (debug_info_level
== DINFO_LEVEL_VERBOSE
4988 && write_symbols
== DWARF_DEBUG
)
4989 dwarfout_resume_previous_source_file (lineno
);
4990 #endif /* DWARF_DEBUGGING_INFO */
4991 #ifdef DWARF2_DEBUGGING_INFO
4992 if (debug_info_level
== DINFO_LEVEL_VERBOSE
4993 && write_symbols
== DWARF2_DEBUG
)
4994 dwarf2out_end_source_file ();
4995 #endif /* DWARF2_DEBUGGING_INFO */
4996 #ifdef SDB_DEBUGGING_INFO
4997 if (write_symbols
== SDB_DEBUG
)
4998 sdbout_resume_previous_source_file ();
5002 /* Called from check_newline in c-parse.y. The `buffer' parameter contains
5003 the tail part of the directive line, i.e. the part which is past the
5004 initial whitespace, #, whitespace, directive-name, whitespace part. */
5007 debug_define (lineno
, buffer
)
5008 register unsigned lineno ATTRIBUTE_UNUSED
;
5009 register char *buffer ATTRIBUTE_UNUSED
;
5011 #ifdef DWARF_DEBUGGING_INFO
5012 if (debug_info_level
== DINFO_LEVEL_VERBOSE
5013 && write_symbols
== DWARF_DEBUG
)
5014 dwarfout_define (lineno
, buffer
);
5015 #endif /* DWARF_DEBUGGING_INFO */
5016 #ifdef DWARF2_DEBUGGING_INFO
5017 if (debug_info_level
== DINFO_LEVEL_VERBOSE
5018 && write_symbols
== DWARF2_DEBUG
)
5019 dwarf2out_define (lineno
, buffer
);
5020 #endif /* DWARF2_DEBUGGING_INFO */
5023 /* Called from check_newline in c-parse.y. The `buffer' parameter contains
5024 the tail part of the directive line, i.e. the part which is past the
5025 initial whitespace, #, whitespace, directive-name, whitespace part. */
5028 debug_undef (lineno
, buffer
)
5029 register unsigned lineno ATTRIBUTE_UNUSED
;
5030 register char *buffer ATTRIBUTE_UNUSED
;
5032 #ifdef DWARF_DEBUGGING_INFO
5033 if (debug_info_level
== DINFO_LEVEL_VERBOSE
5034 && write_symbols
== DWARF_DEBUG
)
5035 dwarfout_undef (lineno
, buffer
);
5036 #endif /* DWARF_DEBUGGING_INFO */
5037 #ifdef DWARF2_DEBUGGING_INFO
5038 if (debug_info_level
== DINFO_LEVEL_VERBOSE
5039 && write_symbols
== DWARF2_DEBUG
)
5040 dwarf2out_undef (lineno
, buffer
);
5041 #endif /* DWARF2_DEBUGGING_INFO */
5044 /* Returns nonzero if it is appropriate not to emit any debugging
5045 information for BLOCK, because it doesn't contain any instructions.
5046 This may not be the case for blocks containing nested functions, since
5047 we may actually call such a function even though the BLOCK information
5051 debug_ignore_block (block
)
5052 tree block ATTRIBUTE_UNUSED
;
5054 /* Never delete the BLOCK for the outermost scope
5055 of the function; we can refer to names from
5056 that scope even if the block notes are messed up. */
5057 if (is_body_block (block
))
5060 #ifdef DWARF2_DEBUGGING_INFO
5061 if (write_symbols
== DWARF2_DEBUG
)
5062 return dwarf2out_ignore_block (block
);