1 /* Top level of GNU C compiler
2 Copyright (C) 1987, 1988, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
3 1999, 2000, 2001 Free Software Foundation, Inc.
5 This file is part of GCC.
7 GCC is free software; you can redistribute it and/or modify it under
8 the terms of the GNU General Public License as published by the Free
9 Software Foundation; either version 2, or (at your option) any later
12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
17 You should have received a copy of the GNU General Public License
18 along with GCC; see the file COPYING. If not, write to the Free
19 Software Foundation, 59 Temple Place - Suite 330, Boston, MA
22 /* This is the top level of cc1/c++.
23 It parses command args, opens files, invokes the various passes
24 in the proper order, and counts the time used by each.
25 Error messages and low-level interface to malloc also handled here. */
28 #undef FLOAT /* This is for hpux. They should change hpux. */
29 #undef FFS /* Some systems define this in param.h. */
34 #ifdef HAVE_SYS_RESOURCE_H
35 # include <sys/resource.h>
38 #ifdef HAVE_SYS_TIMES_H
39 # include <sys/times.h>
47 #include "insn-attr.h"
48 #include "insn-config.h"
49 #include "hard-reg-set.h"
56 #include "basic-block.h"
63 #include "diagnostic.h"
67 #include "dwarf2asm.h"
68 #include "integrate.h"
72 #if defined (DWARF2_UNWIND_INFO) || defined (DWARF2_DEBUGGING_INFO)
73 #include "dwarf2out.h"
76 #if defined(DBX_DEBUGGING_INFO) || defined(XCOFF_DEBUGGING_INFO)
80 #ifdef SDB_DEBUGGING_INFO
84 #ifdef XCOFF_DEBUGGING_INFO
85 #include "xcoffout.h" /* Needed for external data
86 declarations for e.g. AIX 4.x. */
90 /* The extra parameters substantially improve the I/O performance. */
93 vms_fopen (fname
, type
)
97 /* The <stdio.h> in the gcc-vms-1.42 distribution prototypes fopen with two
98 fixed arguments, which matches ANSI's specification but not VAXCRTL's
99 pre-ANSI implementation. This hack circumvents the mismatch problem. */
100 FILE *(*vmslib_fopen
)() = (FILE *(*)()) fopen
;
103 return (*vmslib_fopen
) (fname
, type
, "mbc=32",
104 "deq=64", "fop=tef", "shr=nil");
106 return (*vmslib_fopen
) (fname
, type
, "mbc=32");
109 #define fopen vms_fopen
112 #ifndef DEFAULT_GDB_EXTENSIONS
113 #define DEFAULT_GDB_EXTENSIONS 1
116 /* If more than one debugging type is supported, you must define
117 PREFERRED_DEBUGGING_TYPE to choose a format in a system-dependent way.
119 This is one long line cause VAXC can't handle a \-newline. */
120 #if 1 < (defined (DBX_DEBUGGING_INFO) + defined (SDB_DEBUGGING_INFO) + defined (DWARF_DEBUGGING_INFO) + defined (DWARF2_DEBUGGING_INFO) + defined (XCOFF_DEBUGGING_INFO))
121 #ifndef PREFERRED_DEBUGGING_TYPE
122 You Lose
! You must define PREFERRED_DEBUGGING_TYPE
!
123 #endif /* no PREFERRED_DEBUGGING_TYPE */
124 #else /* Only one debugging format supported. Define PREFERRED_DEBUGGING_TYPE
125 so the following code needn't care. */
126 #ifdef DBX_DEBUGGING_INFO
127 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
129 #ifdef SDB_DEBUGGING_INFO
130 #define PREFERRED_DEBUGGING_TYPE SDB_DEBUG
132 #ifdef DWARF_DEBUGGING_INFO
133 #define PREFERRED_DEBUGGING_TYPE DWARF_DEBUG
135 #ifdef DWARF2_DEBUGGING_INFO
136 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
138 #ifdef XCOFF_DEBUGGING_INFO
139 #define PREFERRED_DEBUGGING_TYPE XCOFF_DEBUG
141 #endif /* More than one debugger format enabled. */
143 /* If still not defined, must have been because no debugging formats
145 #ifndef PREFERRED_DEBUGGING_TYPE
146 #define PREFERRED_DEBUGGING_TYPE NO_DEBUG
149 #if defined (HAVE_DECL_ENVIRON) && !HAVE_DECL_ENVIRON
150 extern char **environ
;
153 /* Carry information from ASM_DECLARE_OBJECT_NAME
154 to ASM_FINISH_DECLARE_OBJECT. */
156 extern int size_directive_output
;
157 extern tree last_assemble_variable_decl
;
159 static void set_target_switch
PARAMS ((const char *));
160 static const char *decl_name
PARAMS ((tree
, int));
162 static void float_signal
PARAMS ((int)) ATTRIBUTE_NORETURN
;
163 static void crash_signal
PARAMS ((int)) ATTRIBUTE_NORETURN
;
164 static void set_float_handler
PARAMS ((jmp_buf));
165 static void compile_file
PARAMS ((const char *));
166 static void display_help
PARAMS ((void));
167 static void display_target_options
PARAMS ((void));
169 static void decode_d_option
PARAMS ((const char *));
170 static int decode_f_option
PARAMS ((const char *));
171 static int decode_W_option
PARAMS ((const char *));
172 static int decode_g_option
PARAMS ((const char *));
173 static unsigned int independent_decode_option
PARAMS ((int, char **));
175 static void print_version
PARAMS ((FILE *, const char *));
176 static int print_single_switch
PARAMS ((FILE *, int, int, const char *,
177 const char *, const char *,
178 const char *, const char *));
179 static void print_switch_values
PARAMS ((FILE *, int, int, const char *,
180 const char *, const char *));
182 /* Length of line when printing switch values. */
185 /* Name of program invoked, sans directories. */
187 const char *progname
;
189 /* Copy of arguments to toplev_main. */
193 /* Name of current original source file (what was input to cpp).
194 This comes from each #-command in the actual input. */
196 const char *input_filename
;
198 /* Name of top-level original source file (what was input to cpp).
199 This comes from the #-command at the beginning of the actual input.
200 If there isn't any there, then this is the cc1 input file name. */
202 const char *main_input_filename
;
204 /* Current line number in real source file. */
208 /* Nonzero if it is unsafe to create any new pseudo registers. */
211 /* Stack of currently pending input files. */
213 struct file_stack
*input_file_stack
;
215 /* Incremented on each change to input_file_stack. */
216 int input_file_stack_tick
;
218 /* Name to use as base of names for dump output files. */
220 const char *dump_base_name
;
222 /* Bit flags that specify the machine subtype we are compiling for.
223 Bits are tested using macros TARGET_... defined in the tm.h file
224 and set by `-m...' switches. Must be defined in rtlanal.c. */
226 extern int target_flags
;
228 /* Debug hooks - dependent upon command line options. */
230 struct gcc_debug_hooks
*debug_hooks
;
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. */
291 /* Describes all the dump files. Should be kept in order of the
292 pass and in sync with dump_file_index above.
294 Remaining -d letters:
300 struct dump_file_info dump_file
[DFI_MAX
] =
302 { "rtl", 'r', 0, 0, 0 },
303 { "sibling", 'i', 0, 0, 0 },
304 { "eh", 'h', 0, 0, 0 },
305 { "jump", 'j', 0, 0, 0 },
306 { "ssa", 'e', 1, 0, 0 },
307 { "ssaccp", 'W', 1, 0, 0 },
308 { "ssadce", 'X', 1, 0, 0 },
309 { "ussa", 'e', 1, 0, 0 }, /* Yes, duplicate enable switch. */
310 { "cse", 's', 0, 0, 0 },
311 { "addressof", 'F', 0, 0, 0 },
312 { "gcse", 'G', 1, 0, 0 },
313 { "loop", 'L', 1, 0, 0 },
314 { "cse2", 't', 1, 0, 0 },
315 { "cfg", 'f', 1, 0, 0 },
316 { "bp", 'b', 1, 0, 0 },
317 { "life", 'f', 1, 0, 0 }, /* Yes, duplicate enable switch. */
318 { "combine", 'c', 1, 0, 0 },
319 { "ce", 'C', 1, 0, 0 },
320 { "regmove", 'N', 1, 0, 0 },
321 { "sched", 'S', 1, 0, 0 },
322 { "lreg", 'l', 1, 0, 0 },
323 { "greg", 'g', 1, 0, 0 },
324 { "postreload", 'o', 1, 0, 0 },
325 { "flow2", 'w', 1, 0, 0 },
326 { "peephole2", 'z', 1, 0, 0 },
327 { "rnreg", 'n', 1, 0, 0 },
328 { "ce2", 'E', 1, 0, 0 },
329 { "sched2", 'R', 1, 0, 0 },
330 { "stack", 'k', 1, 0, 0 },
331 { "bbro", 'B', 1, 0, 0 },
332 { "mach", 'M', 1, 0, 0 },
333 { "dbr", 'd', 0, 0, 0 },
336 static int open_dump_file
PARAMS ((enum dump_file_index
, tree
));
337 static void close_dump_file
PARAMS ((enum dump_file_index
,
338 void (*) (FILE *, rtx
), rtx
));
340 /* Other flags saying which kinds of debugging dump have been requested. */
342 int rtl_dump_and_exit
;
343 int flag_print_asm_name
;
344 static int version_flag
;
345 static char *filename
;
346 enum graph_dump_types graph_dump_format
;
348 /* Name for output file of assembly code, specified with -o. */
352 /* Value of the -G xx switch, and whether it was passed or not. */
356 /* Type(s) of debugging information we are producing (if any).
357 See flags.h for the definitions of the different possible
358 types of debugging information. */
359 enum debug_info_type write_symbols
= NO_DEBUG
;
361 /* Level of debugging information we are producing. See flags.h
362 for the definitions of the different possible levels. */
363 enum debug_info_level debug_info_level
= DINFO_LEVEL_NONE
;
365 /* Nonzero means use GNU-only extensions in the generated symbolic
366 debugging information. */
367 /* Currently, this only has an effect when write_symbols is set to
368 DBX_DEBUG, XCOFF_DEBUG, or DWARF_DEBUG. */
369 int use_gnu_debug_info_extensions
= 0;
371 /* Nonzero means do optimizations. -O.
372 Particular numeric values stand for particular amounts of optimization;
373 thus, -O2 stores 2 here. However, the optimizations beyond the basic
374 ones are not controlled directly by this variable. Instead, they are
375 controlled by individual `flag_...' variables that are defaulted
376 based on this variable. */
380 /* Nonzero means optimize for size. -Os.
381 The only valid values are zero and non-zero. When optimize_size is
382 non-zero, optimize defaults to 2, but certain individual code
383 bloating optimizations are disabled. */
385 int optimize_size
= 0;
387 /* Nonzero if we should exit after parsing options. */
388 static int exit_after_options
= 0;
390 /* The FUNCTION_DECL for the function currently being compiled,
391 or 0 if between functions. */
392 tree current_function_decl
;
394 /* Set to the FUNC_BEGIN label of the current function, or NULL_TREE
396 tree current_function_func_begin_label
;
398 /* Pointer to function to compute the name to use to print a declaration.
399 DECL is the declaration in question.
400 VERBOSITY determines what information will be printed:
401 0: DECL_NAME, demangled as necessary.
402 1: and scope information.
403 2: and any other information that might be interesting, such as function
404 parameter types in C++. */
406 const char *(*decl_printable_name
) PARAMS ((tree
, int));
408 /* Pointer to function to compute rtl for a language-specific tree code. */
410 typedef rtx (*lang_expand_expr_t
)
411 PARAMS ((union tree_node
*, rtx
, enum machine_mode
,
412 enum expand_modifier modifier
));
414 lang_expand_expr_t lang_expand_expr
= 0;
416 tree (*lang_expand_constant
) PARAMS ((tree
)) = 0;
418 /* Pointer to function to finish handling an incomplete decl at the
419 end of compilation. */
421 void (*incomplete_decl_finalize_hook
) PARAMS ((tree
)) = 0;
423 /* Nonzero if doing dwarf2 duplicate elimination. */
425 int flag_eliminate_dwarf2_dups
= 0;
427 /* Nonzero if generating code to do profiling. */
429 int profile_flag
= 0;
431 /* Nonzero if generating code to do profiling on a line-by-line basis. */
433 int profile_block_flag
;
435 /* Nonzero if generating code to profile program flow graph arcs. */
437 int profile_arc_flag
= 0;
439 /* Nonzero if generating info for gcov to calculate line test coverage. */
441 int flag_test_coverage
= 0;
443 /* Nonzero indicates that branch taken probabilities should be calculated. */
445 int flag_branch_probabilities
= 0;
447 /* Nonzero if basic blocks should be reordered. */
449 int flag_reorder_blocks
= 0;
451 /* Nonzero if registers should be renamed. */
453 int flag_rename_registers
= 0;
455 /* Nonzero for -pedantic switch: warn about anything
456 that standard spec forbids. */
460 /* Temporarily suppress certain warnings.
461 This is set while reading code from a system header file. */
463 int in_system_header
= 0;
465 /* Don't print functions as they are compiled. -quiet. */
469 /* Print times taken by the various passes. -ftime-report. */
473 /* Print memory still in use at end of compilation (which may have little
474 to do with peak memory consumption). -fmem-report. */
478 /* Non-zero means to collect statistics which might be expensive
479 and to print them when we are done. */
480 int flag_detailed_statistics
= 0;
485 /* Nonzero means `char' should be signed. */
487 int flag_signed_char
;
489 /* Nonzero means give an enum type only as many bytes as it needs. */
491 int flag_short_enums
;
493 /* Nonzero for -fcaller-saves: allocate values in regs that need to
494 be saved across function calls, if that produces overall better code.
495 Optional now, so people can test it. */
497 #ifdef DEFAULT_CALLER_SAVES
498 int flag_caller_saves
= 1;
500 int flag_caller_saves
= 0;
503 /* Nonzero if structures and unions should be returned in memory.
505 This should only be defined if compatibility with another compiler or
506 with an ABI is needed, because it results in slower code. */
508 #ifndef DEFAULT_PCC_STRUCT_RETURN
509 #define DEFAULT_PCC_STRUCT_RETURN 1
512 /* Nonzero for -fpcc-struct-return: return values the same way PCC does. */
514 int flag_pcc_struct_return
= DEFAULT_PCC_STRUCT_RETURN
;
516 /* Nonzero for -fforce-mem: load memory value into a register
517 before arithmetic on it. This makes better cse but slower compilation. */
519 int flag_force_mem
= 0;
521 /* Nonzero for -fforce-addr: load memory address into a register before
522 reference to memory. This makes better cse but slower compilation. */
524 int flag_force_addr
= 0;
526 /* Nonzero for -fdefer-pop: don't pop args after each function call;
527 instead save them up to pop many calls' args with one insns. */
529 int flag_defer_pop
= 0;
531 /* Nonzero for -ffloat-store: don't allocate floats and doubles
532 in extended-precision registers. */
534 int flag_float_store
= 0;
536 /* Nonzero for -fcse-follow-jumps:
537 have cse follow jumps to do a more extensive job. */
539 int flag_cse_follow_jumps
;
541 /* Nonzero for -fcse-skip-blocks:
542 have cse follow a branch around a block. */
543 int flag_cse_skip_blocks
;
545 /* Nonzero for -fexpensive-optimizations:
546 perform miscellaneous relatively-expensive optimizations. */
547 int flag_expensive_optimizations
;
549 /* Nonzero for -fthread-jumps:
550 have jump optimize output of loop. */
552 int flag_thread_jumps
;
554 /* Nonzero enables strength-reduction in loop.c. */
556 int flag_strength_reduce
= 0;
558 /* Nonzero enables loop unrolling in unroll.c. Only loops for which the
559 number of iterations can be calculated at compile-time (UNROLL_COMPLETELY,
560 UNROLL_MODULO) or at run-time (preconditioned to be UNROLL_MODULO) are
563 int flag_unroll_loops
;
565 /* Nonzero enables loop unrolling in unroll.c. All loops are unrolled.
566 This is generally not a win. */
568 int flag_unroll_all_loops
;
570 /* Nonzero forces all invariant computations in loops to be moved
573 int flag_move_all_movables
= 0;
575 /* Nonzero forces all general induction variables in loops to be
578 int flag_reduce_all_givs
= 0;
580 /* Nonzero to perform full register move optimization passes. This is the
583 int flag_regmove
= 0;
585 /* Nonzero for -fwritable-strings:
586 store string constants in data segment and don't uniquize them. */
588 int flag_writable_strings
= 0;
590 /* Nonzero means don't put addresses of constant functions in registers.
591 Used for compiling the Unix kernel, where strange substitutions are
592 done on the assembly output. */
594 int flag_no_function_cse
= 0;
596 /* Nonzero for -fomit-frame-pointer:
597 don't make a frame pointer in simple functions that don't require one. */
599 int flag_omit_frame_pointer
= 0;
601 /* Nonzero means place each function into its own section on those platforms
602 which support arbitrary section names and unlimited numbers of sections. */
604 int flag_function_sections
= 0;
606 /* ... and similar for data. */
608 int flag_data_sections
= 0;
610 /* Nonzero to inhibit use of define_optimization peephole opts. */
612 int flag_no_peephole
= 0;
614 /* Nonzero allows GCC to optimize sibling and tail recursive calls. */
616 int flag_optimize_sibling_calls
= 0;
618 /* Nonzero means the front end generally wants `errno' maintained by math
619 operations, like built-in SQRT. */
621 int flag_errno_math
= 1;
623 /* Nonzero means that unsafe floating-point math optimizations are allowed
624 for the sake of speed. IEEE compliance is not guaranteed, and operations
625 are allowed to assume that their arguments and results are "normal"
626 (e.g., nonnegative for SQRT). */
628 int flag_unsafe_math_optimizations
= 0;
630 /* Zero means that floating-point math operations cannot generate a
631 (user-visible) trap. This is the case, for example, in nonstop
632 IEEE 754 arithmetic. */
634 int flag_trapping_math
= 1;
636 /* 0 means straightforward implementation of complex divide acceptable.
637 1 means wide ranges of inputs must work for complex divide.
638 2 means C99-like requirements for complex divide (not yet implemented). */
640 int flag_complex_divide_method
= 0;
642 /* Nonzero means all references through pointers are volatile. */
646 /* Nonzero means treat all global and extern variables as volatile. */
648 int flag_volatile_global
;
650 /* Nonzero means treat all static variables as volatile. */
652 int flag_volatile_static
;
654 /* Nonzero means just do syntax checking; don't output anything. */
656 int flag_syntax_only
= 0;
658 /* Nonzero means perform global cse. */
660 static int flag_gcse
;
662 /* Nonzero means to use global dataflow analysis to eliminate
663 useless null pointer tests. */
665 static int flag_delete_null_pointer_checks
;
667 /* Nonzero means to do the enhanced load motion during gcse, which trys
668 to hoist loads by not killing them when a store to the same location
671 int flag_gcse_lm
= 1;
673 /* Nonzero means to perform store motion after gcse, which will try to
674 move stores closer to the exit block. Its not very effective without
677 int flag_gcse_sm
= 1;
679 /* Nonzero means to rerun cse after loop optimization. This increases
680 compilation time about 20% and picks up a few more common expressions. */
682 static int flag_rerun_cse_after_loop
;
684 /* Nonzero means to run loop optimizations twice. */
686 int flag_rerun_loop_opt
;
688 /* Nonzero for -finline-functions: ok to inline functions that look like
689 good inline candidates. */
691 int flag_inline_functions
;
693 /* Nonzero for -fkeep-inline-functions: even if we make a function
694 go inline everywhere, keep its definition around for debugging
697 int flag_keep_inline_functions
;
699 /* Nonzero means that functions will not be inlined. */
703 /* Nonzero means that we should emit static const variables
704 regardless of whether or not optimization is turned on. */
706 int flag_keep_static_consts
= 1;
708 /* Nonzero means we should be saving declaration info into a .X file. */
710 int flag_gen_aux_info
= 0;
712 /* Specified name of aux-info file. */
714 static char *aux_info_file_name
;
716 /* Nonzero means make the text shared if supported. */
718 int flag_shared_data
;
720 /* Nonzero means schedule into delayed branch slots if supported. */
722 int flag_delayed_branch
;
724 /* Nonzero if we are compiling pure (sharable) code.
725 Value is 1 if we are doing reasonable (i.e. simple
726 offset into offset table) pic. Value is 2 if we can
727 only perform register offsets. */
731 /* Nonzero means generate extra code for exception handling and enable
732 exception handling. */
736 /* Nonzero means generate frame unwind info table when supported. */
738 int flag_unwind_tables
= 0;
740 /* Nonzero means don't place uninitialized global data in common storage
745 /* Nonzero means pretend it is OK to examine bits of target floats,
746 even if that isn't true. The resulting code will have incorrect constants,
747 but the same series of instructions that the native compiler would make. */
749 int flag_pretend_float
;
751 /* Nonzero means change certain warnings into errors.
752 Usually these are warnings about failure to conform to some standard. */
754 int flag_pedantic_errors
= 0;
756 /* flag_schedule_insns means schedule insns within basic blocks (before
758 flag_schedule_insns_after_reload means schedule insns after
761 int flag_schedule_insns
= 0;
762 int flag_schedule_insns_after_reload
= 0;
764 /* The following flags have effect only for scheduling before register
767 flag_schedule_interblock means schedule insns accross basic blocks.
768 flag_schedule_speculative means allow speculative motion of non-load insns.
769 flag_schedule_speculative_load means allow speculative motion of some
771 flag_schedule_speculative_load_dangerous allows speculative motion of more
774 int flag_schedule_interblock
= 1;
775 int flag_schedule_speculative
= 1;
776 int flag_schedule_speculative_load
= 0;
777 int flag_schedule_speculative_load_dangerous
= 0;
779 int flag_single_precision_constant
;
781 /* flag_branch_on_count_reg means try to replace add-1,compare,branch tupple
782 by a cheaper branch on a count register. */
783 int flag_branch_on_count_reg
= 1;
785 /* -finhibit-size-directive inhibits output of .size for ELF.
786 This is used only for compiling crtstuff.c,
787 and it may be extended to other effects
788 needed for crtstuff.c on other systems. */
789 int flag_inhibit_size_directive
= 0;
791 /* -fverbose-asm causes extra commentary information to be produced in
792 the generated assembly code (to make it more readable). This option
793 is generally only of use to those who actually need to read the
794 generated assembly code (perhaps while debugging the compiler itself).
795 -fno-verbose-asm, the default, causes the extra information
796 to be omitted and is useful when comparing two assembler files. */
798 int flag_verbose_asm
= 0;
800 /* -dA causes debug commentary information to be produced in
801 the generated assembly code (to make it more readable). This option
802 is generally only of use to those who actually need to read the
803 generated assembly code (perhaps while debugging the compiler itself).
804 Currently, this switch is only used by dwarfout.c; however, it is intended
805 to be a catchall for printing debug information in the assembler file. */
807 int flag_debug_asm
= 0;
809 /* -dP causes the rtl to be emitted as a comment in assembly. */
811 int flag_dump_rtl_in_asm
= 0;
813 /* -fgnu-linker specifies use of the GNU linker for initializations.
814 (Or, more generally, a linker that handles initializations.)
815 -fno-gnu-linker says that collect2 will be used. */
817 int flag_gnu_linker
= 0;
819 int flag_gnu_linker
= 1;
825 /* Enable ssa conditional constant propagation. */
826 int flag_ssa_ccp
= 0;
828 /* Enable ssa aggressive dead code elimination. */
829 int flag_ssa_dce
= 0;
831 /* Tag all structures with __attribute__(packed). */
832 int flag_pack_struct
= 0;
834 /* Emit code to check for stack overflow; also may cause large objects
835 to be allocated dynamically. */
836 int flag_stack_check
;
838 /* When non-NULL, indicates that whenever space is allocated on the
839 stack, the resulting stack pointer must not pass this
840 address---that is, for stacks that grow downward, the stack pointer
841 must always be greater than or equal to this address; for stacks
842 that grow upward, the stack pointer must be less than this address.
843 At present, the rtx may be either a REG or a SYMBOL_REF, although
844 the support provided depends on the backend. */
847 /* -fcheck-memory-usage causes extra code to be generated in order to check
848 memory accesses. This is used by a detector of bad memory accesses such
850 int flag_check_memory_usage
= 0;
852 /* -fprefix-function-name causes function name to be prefixed. This
853 can be used with -fcheck-memory-usage to isolate code compiled with
854 -fcheck-memory-usage. */
855 int flag_prefix_function_name
= 0;
857 /* 0 if pointer arguments may alias each other. True in C.
858 1 if pointer arguments may not alias each other but may alias
860 2 if pointer arguments may not alias each other and may not
861 alias global variables. True in Fortran.
862 This defaults to 0 for C. */
863 int flag_argument_noalias
= 0;
865 /* Nonzero if we should do (language-dependent) alias analysis.
866 Typically, this analysis will assume that expressions of certain
867 types do not alias expressions of certain other types. Only used
868 if alias analysis (in general) is enabled. */
869 int flag_strict_aliasing
= 0;
871 /* Instrument functions with calls at entry and exit, for profiling. */
872 int flag_instrument_function_entry_exit
= 0;
874 /* Nonzero means ignore `#ident' directives. 0 means handle them.
875 On SVR4 targets, it also controls whether or not to emit a
876 string identifying the compiler. */
878 int flag_no_ident
= 0;
880 /* This will perform a peephole pass before sched2. */
881 int flag_peephole2
= 0;
883 /* This will try to guess branch probabilities. */
884 int flag_guess_branch_prob
= 0;
886 /* -fbounded-pointers causes gcc to compile pointers as composite
887 objects occupying three words: the pointer value, the base address
888 of the referent object, and the address immediately beyond the end
889 of the referent object. The base and extent allow us to perform
890 runtime bounds checking. -fbounded-pointers implies -fcheck-bounds. */
891 int flag_bounded_pointers
= 0;
893 /* -fcheck-bounds causes gcc to generate array bounds checks.
894 For C, C++: defaults to value of flag_bounded_pointers.
895 For ObjC: defaults to off.
896 For Java: defaults to on.
897 For Fortran: defaults to off.
898 For CHILL: defaults to off. */
899 int flag_bounds_check
= 0;
901 /* This will attempt to merge constant section constants, if 1 only
902 string constants and constants from constant pool, if 2 also constant
904 int flag_merge_constants
= 1;
906 /* If one, renumber instruction UIDs to reduce the number of
907 unused UIDs if there are a lot of instructions. If greater than
908 one, unconditionally renumber instruction UIDs. */
909 int flag_renumber_insns
= 1;
911 /* Values of the -falign-* flags: how much to align labels in code.
912 0 means `use default', 1 means `don't align'.
913 For each variable, there is an _log variant which is the power
914 of two not less than the variable, for .align output. */
921 int align_labels_log
;
923 int align_functions_log
;
925 /* Table of supported debugging formats. */
929 /* Since PREFERRED_DEBUGGING_TYPE isn't necessarily a
930 constant expression, we use NO_DEBUG in its place. */
931 enum debug_info_type debug_type
;
932 int use_extensions_p
;
933 const char *description
;
937 { "", NO_DEBUG
, DEFAULT_GDB_EXTENSIONS
,
938 N_("Generate debugging info in default format") },
939 { "gdb", NO_DEBUG
, 1, N_("Generate debugging info in default extended format") },
940 #ifdef DBX_DEBUGGING_INFO
941 { "stabs", DBX_DEBUG
, 0, N_("Generate STABS format debug info") },
942 { "stabs+", DBX_DEBUG
, 1, N_("Generate extended STABS format debug info") },
944 #ifdef DWARF_DEBUGGING_INFO
945 { "dwarf", DWARF_DEBUG
, 0, N_("Generate DWARF-1 format debug info") },
946 { "dwarf+", DWARF_DEBUG
, 1,
947 N_("Generate extended DWARF-1 format debug info") },
949 #ifdef DWARF2_DEBUGGING_INFO
950 { "dwarf-2", DWARF2_DEBUG
, 0, N_("Generate DWARF-2 debug info") },
952 #ifdef XCOFF_DEBUGGING_INFO
953 { "xcoff", XCOFF_DEBUG
, 0, N_("Generate XCOFF format debug info") },
954 { "xcoff+", XCOFF_DEBUG
, 1, N_("Generate extended XCOFF format debug info") },
956 #ifdef SDB_DEBUGGING_INFO
957 { "coff", SDB_DEBUG
, 0, N_("Generate COFF format debug info") },
967 const char *description
;
969 lang_independent_options
;
973 /* Add or remove a leading underscore from user symbols. */
974 int flag_leading_underscore
= -1;
976 /* The user symbol prefix after having resolved same. */
977 const char *user_label_prefix
;
979 static const param_info lang_independent_params
[] = {
980 #define DEFPARAM(ENUM, OPTION, HELP, DEFAULT) \
981 { OPTION, DEFAULT, HELP },
982 #include "params.def"
987 /* A default for same. */
988 #ifndef USER_LABEL_PREFIX
989 #define USER_LABEL_PREFIX ""
992 /* Table of language-independent -f options.
993 STRING is the option name. VARIABLE is the address of the variable.
994 ON_VALUE is the value to store in VARIABLE
995 if `-fSTRING' is seen as an option.
996 (If `-fno-STRING' is seen as an option, the opposite value is stored.) */
998 lang_independent_options f_options
[] =
1000 {"eliminate-dwarf2-dups", &flag_eliminate_dwarf2_dups
, 1,
1001 N_("Perform DWARF2 duplicate elimination") },
1002 {"float-store", &flag_float_store
, 1,
1003 N_("Do not store floats in registers") },
1004 {"volatile", &flag_volatile
, 1,
1005 N_("Consider all mem refs through pointers as volatile") },
1006 {"volatile-global", &flag_volatile_global
, 1,
1007 N_("Consider all mem refs to global data to be volatile") },
1008 {"volatile-static", &flag_volatile_static
, 1,
1009 N_("Consider all mem refs to static data to be volatile") },
1010 {"defer-pop", &flag_defer_pop
, 1,
1011 N_("Defer popping functions args from stack until later") },
1012 {"omit-frame-pointer", &flag_omit_frame_pointer
, 1,
1013 N_("When possible do not generate stack frames") },
1014 {"optimize-sibling-calls", &flag_optimize_sibling_calls
, 1,
1015 N_("Optimize sibling and tail recursive calls") },
1016 {"cse-follow-jumps", &flag_cse_follow_jumps
, 1,
1017 N_("When running CSE, follow jumps to their targets") },
1018 {"cse-skip-blocks", &flag_cse_skip_blocks
, 1,
1019 N_("When running CSE, follow conditional jumps") },
1020 {"expensive-optimizations", &flag_expensive_optimizations
, 1,
1021 N_("Perform a number of minor, expensive optimisations") },
1022 {"thread-jumps", &flag_thread_jumps
, 1,
1023 N_("Perform jump threading optimisations") },
1024 {"strength-reduce", &flag_strength_reduce
, 1,
1025 N_("Perform strength reduction optimisations") },
1026 {"unroll-loops", &flag_unroll_loops
, 1,
1027 N_("Perform loop unrolling when iteration count is known") },
1028 {"unroll-all-loops", &flag_unroll_all_loops
, 1,
1029 N_("Perform loop unrolling for all loops") },
1030 {"move-all-movables", &flag_move_all_movables
, 1,
1031 N_("Force all loop invariant computations out of loops") },
1032 {"reduce-all-givs", &flag_reduce_all_givs
, 1,
1033 N_("Strength reduce all loop general induction variables") },
1034 {"writable-strings", &flag_writable_strings
, 1,
1035 N_("Store strings in writable data section") },
1036 {"peephole", &flag_no_peephole
, 0,
1037 N_("Enable machine specific peephole optimisations") },
1038 {"force-mem", &flag_force_mem
, 1,
1039 N_("Copy memory operands into registers before using") },
1040 {"force-addr", &flag_force_addr
, 1,
1041 N_("Copy memory address constants into regs before using") },
1042 {"function-cse", &flag_no_function_cse
, 0,
1043 N_("Allow function addresses to be held in registers") },
1044 {"inline-functions", &flag_inline_functions
, 1,
1045 N_("Integrate simple functions into their callers") },
1046 {"keep-inline-functions", &flag_keep_inline_functions
, 1,
1047 N_("Generate code for funcs even if they are fully inlined") },
1048 {"inline", &flag_no_inline
, 0,
1049 N_("Pay attention to the 'inline' keyword") },
1050 {"keep-static-consts", &flag_keep_static_consts
, 1,
1051 N_("Emit static const variables even if they are not used") },
1052 {"syntax-only", &flag_syntax_only
, 1,
1053 N_("Check for syntax errors, then stop") },
1054 {"shared-data", &flag_shared_data
, 1,
1055 N_("Mark data as shared rather than private") },
1056 {"caller-saves", &flag_caller_saves
, 1,
1057 N_("Enable saving registers around function calls") },
1058 {"pcc-struct-return", &flag_pcc_struct_return
, 1,
1059 N_("Return 'short' aggregates in memory, not registers") },
1060 {"reg-struct-return", &flag_pcc_struct_return
, 0,
1061 N_("Return 'short' aggregates in registers") },
1062 {"delayed-branch", &flag_delayed_branch
, 1,
1063 N_("Attempt to fill delay slots of branch instructions") },
1064 {"gcse", &flag_gcse
, 1,
1065 N_("Perform the global common subexpression elimination") },
1066 {"gcse-lm", &flag_gcse_lm
, 1,
1067 N_("Perform enhanced load motion during global subexpression elimination") },
1068 {"gcse-sm", &flag_gcse_sm
, 1,
1069 N_("Perform store motion after global subexpression elimination") },
1070 {"rerun-cse-after-loop", &flag_rerun_cse_after_loop
, 1,
1071 N_("Run CSE pass after loop optimisations") },
1072 {"rerun-loop-opt", &flag_rerun_loop_opt
, 1,
1073 N_("Run the loop optimiser twice") },
1074 {"delete-null-pointer-checks", &flag_delete_null_pointer_checks
, 1,
1075 N_("Delete useless null pointer checks") },
1076 {"pretend-float", &flag_pretend_float
, 1,
1077 N_("Pretend that host and target use the same FP format") },
1078 {"schedule-insns", &flag_schedule_insns
, 1,
1079 N_("Reschedule instructions before register allocation") },
1080 {"schedule-insns2", &flag_schedule_insns_after_reload
, 1,
1081 N_("Reschedule instructions after register allocation") },
1082 {"sched-interblock",&flag_schedule_interblock
, 1,
1083 N_("Enable scheduling across basic blocks") },
1084 {"sched-spec",&flag_schedule_speculative
, 1,
1085 N_("Allow speculative motion of non-loads") },
1086 {"sched-spec-load",&flag_schedule_speculative_load
, 1,
1087 N_("Allow speculative motion of some loads") },
1088 {"sched-spec-load-dangerous",&flag_schedule_speculative_load_dangerous
, 1,
1089 N_("Allow speculative motion of more loads") },
1090 {"branch-count-reg",&flag_branch_on_count_reg
, 1,
1091 N_("Replace add,compare,branch with branch on count reg") },
1092 {"pic", &flag_pic
, 1,
1093 N_("Generate position independent code, if possible") },
1094 {"PIC", &flag_pic
, 2, ""},
1095 {"exceptions", &flag_exceptions
, 1,
1096 N_("Enable exception handling") },
1097 {"unwind-tables", &flag_unwind_tables
, 1,
1098 N_("Just generate unwind tables for exception handling") },
1099 {"non-call-exceptions", &flag_non_call_exceptions
, 1,
1100 N_("Support synchronous non-call exceptions") },
1101 {"profile-arcs", &profile_arc_flag
, 1,
1102 N_("Insert arc based program profiling code") },
1103 {"test-coverage", &flag_test_coverage
, 1,
1104 N_("Create data files needed by gcov") },
1105 {"branch-probabilities", &flag_branch_probabilities
, 1,
1106 N_("Use profiling information for branch probabilities") },
1107 {"reorder-blocks", &flag_reorder_blocks
, 1,
1108 N_("Reorder basic blocks to improve code placement") },
1109 {"rename-registers", &flag_rename_registers
, 1,
1110 N_("Do the register renaming optimization pass") },
1111 {"common", &flag_no_common
, 0,
1112 N_("Do not put unitialised globals in the common section") },
1113 {"inhibit-size-directive", &flag_inhibit_size_directive
, 1,
1114 N_("Do not generate .size directives") },
1115 {"function-sections", &flag_function_sections
, 1,
1116 N_("place each function into its own section") },
1117 {"data-sections", &flag_data_sections
, 1,
1118 N_("place data items into their own section") },
1119 {"verbose-asm", &flag_verbose_asm
, 1,
1120 N_("Add extra commentry to assembler output") },
1121 {"gnu-linker", &flag_gnu_linker
, 1,
1122 N_("Output GNU ld formatted global initialisers") },
1123 {"regmove", &flag_regmove
, 1,
1124 N_("Enables a register move optimisation") },
1125 {"optimize-register-move", &flag_regmove
, 1,
1126 N_("Do the full regmove optimization pass") },
1127 {"pack-struct", &flag_pack_struct
, 1,
1128 N_("Pack structure members together without holes") },
1129 {"stack-check", &flag_stack_check
, 1,
1130 N_("Insert stack checking code into the program") },
1131 {"argument-alias", &flag_argument_noalias
, 0,
1132 N_("Specify that arguments may alias each other & globals") },
1133 {"argument-noalias", &flag_argument_noalias
, 1,
1134 N_("Assume arguments may alias globals but not each other") },
1135 {"argument-noalias-global", &flag_argument_noalias
, 2,
1136 N_("Assume arguments do not alias each other or globals") },
1137 {"strict-aliasing", &flag_strict_aliasing
, 1,
1138 N_("Assume strict aliasing rules apply") },
1139 {"align-loops", &align_loops
, 0,
1140 N_("Align the start of loops") },
1141 {"align-jumps", &align_jumps
, 0,
1142 N_("Align labels which are only reached by jumping") },
1143 {"align-labels", &align_labels
, 0,
1144 N_("Align all labels") },
1145 {"align-functions", &align_functions
, 0,
1146 N_("Align the start of functions") },
1147 {"merge-constants", &flag_merge_constants
, 1,
1148 N_("Attempt to merge identical constants accross compilation units") },
1149 {"merge-all-constants", &flag_merge_constants
, 2,
1150 N_("Attempt to merge identical constants and constant variables") },
1151 {"check-memory-usage", &flag_check_memory_usage
, 1,
1152 N_("Generate code to check every memory access") },
1153 {"prefix-function-name", &flag_prefix_function_name
, 1,
1154 N_("Add a prefix to all function names") },
1155 {"dump-unnumbered", &flag_dump_unnumbered
, 1,
1156 N_("Suppress output of instruction numbers and line number notes in debugging dumps") },
1157 {"instrument-functions", &flag_instrument_function_entry_exit
, 1,
1158 N_("Instrument function entry/exit with profiling calls") },
1159 {"ssa", &flag_ssa
, 1,
1160 N_("Enable SSA optimizations") },
1161 {"ssa-ccp", &flag_ssa_ccp
, 1,
1162 N_("Enable SSA conditonal constant propagation") },
1163 {"ssa-dce", &flag_ssa_dce
, 1,
1164 N_("Enable aggressive SSA dead code elimination") },
1165 {"leading-underscore", &flag_leading_underscore
, 1,
1166 N_("External symbols have a leading underscore") },
1167 {"ident", &flag_no_ident
, 0,
1168 N_("Process #ident directives") },
1169 { "peephole2", &flag_peephole2
, 1,
1170 N_("Enables an rtl peephole pass run before sched2") },
1171 { "guess-branch-probability", &flag_guess_branch_prob
, 1,
1172 N_("Enables guessing of branch probabilities") },
1173 {"math-errno", &flag_errno_math
, 1,
1174 N_("Set errno after built-in math functions") },
1175 {"trapping-math", &flag_trapping_math
, 1,
1176 N_("Floating-point operations can trap") },
1177 {"unsafe-math-optimizations", &flag_unsafe_math_optimizations
, 1,
1178 N_("Allow math optimizations that may violate IEEE or ANSI standards") },
1179 {"bounded-pointers", &flag_bounded_pointers
, 1,
1180 N_("Compile pointers as triples: value, base & end") },
1181 {"bounds-check", &flag_bounds_check
, 1,
1182 N_("Generate code to check bounds before dereferencing pointers and arrays") },
1183 {"single-precision-constant", &flag_single_precision_constant
, 1,
1184 N_("Convert floating point constant to single precision constant") },
1185 {"time-report", &time_report
, 1,
1186 N_("Report time taken by each compiler pass at end of run") },
1187 {"mem-report", &mem_report
, 1,
1188 N_("Report on permanent memory allocation at end of run") },
1189 { "trapv", &flag_trapv
, 1,
1190 N_("Trap for signed overflow in addition / subtraction / multiplication.") },
1193 /* Table of language-specific options. */
1195 static struct lang_opt
1198 const char *description
;
1200 documented_lang_options
[] =
1202 /* In order not to overload the --help output, the convention
1203 used here is to only describe those options which are not
1204 enabled by default. */
1207 N_("Compile just for ISO C89") },
1208 { "-fallow-single-precision",
1209 N_("Do not promote floats to double if using -traditional") },
1211 N_("Determine language standard") },
1213 { "-fsigned-bitfields", "" },
1214 { "-funsigned-bitfields",
1215 N_("Make bitfields by unsigned by default") },
1216 { "-fno-signed-bitfields", "" },
1217 { "-fno-unsigned-bitfields","" },
1219 N_("Make 'char' be signed by default") },
1220 { "-funsigned-char",
1221 N_("Make 'char' be unsigned by default") },
1222 { "-fno-signed-char", "" },
1223 { "-fno-unsigned-char", "" },
1225 { "-ftraditional", "" },
1227 N_("Attempt to support traditional K&R style C") },
1228 { "-fnotraditional", "" },
1229 { "-fno-traditional", "" },
1233 N_("Do not recognise the 'asm' keyword") },
1234 { "-fbuiltin", "" },
1236 N_("Do not recognise any built in functions") },
1238 N_("Assume normal C execution environment") },
1239 { "-fno-hosted", "" },
1241 N_("Assume that standard libraries & main might not exist") },
1242 { "-fno-freestanding", "" },
1243 { "-fcond-mismatch",
1244 N_("Allow different types as args of ? operator") },
1245 { "-fno-cond-mismatch", "" },
1246 { "-fdollars-in-identifiers",
1247 N_("Allow the use of $ inside identifiers") },
1248 { "-fno-dollars-in-identifiers", "" },
1249 { "-fpreprocessed", "" },
1250 { "-fno-preprocessed", "" },
1252 N_("Use the same size for double as for float") },
1253 { "-fno-short-double", "" },
1255 N_("Use the smallest fitting integer to hold enums") },
1256 { "-fno-short-enums", "" },
1258 N_("Override the underlying type for wchar_t to `unsigned short'") },
1259 { "-fno-short-wchar", "" },
1262 N_("Enable most warning messages") },
1263 { "-Wbad-function-cast",
1264 N_("Warn about casting functions to incompatible types") },
1265 { "-Wno-bad-function-cast", "" },
1266 { "-Wno-missing-noreturn", "" },
1267 { "-Wmissing-format-attribute",
1268 N_("Warn about functions which might be candidates for format attributes") },
1269 { "-Wno-missing-format-attribute", "" },
1271 N_("Warn about casts which discard qualifiers") },
1272 { "-Wno-cast-qual", "" },
1273 { "-Wchar-subscripts",
1274 N_("Warn about subscripts whose type is 'char'") },
1275 { "-Wno-char-subscripts", "" },
1277 N_("Warn if nested comments are detected") },
1278 { "-Wno-comment", "" },
1280 N_("Warn if nested comments are detected") },
1281 { "-Wno-comments", "" },
1283 N_("Warn about possibly confusing type conversions") },
1284 { "-Wno-conversion", "" },
1286 N_("Warn about printf/scanf/strftime/strfmon format anomalies") },
1287 { "-Wno-format", "" },
1288 { "-Wformat-y2k", "" },
1289 { "-Wno-format-y2k",
1290 N_("Don't warn about strftime formats yielding 2 digit years") },
1291 { "-Wformat-extra-args", "" },
1292 { "-Wno-format-extra-args",
1293 N_("Don't warn about too many arguments to format functions") },
1294 { "-Wformat-nonliteral",
1295 N_("Warn about non-string-literal format strings") },
1296 { "-Wno-format-nonliteral", "" },
1297 { "-Wformat-security",
1298 N_("Warn about possible security problems with format functions") },
1299 { "-Wno-format-security", "" },
1300 { "-Wimplicit-function-declaration",
1301 N_("Warn about implicit function declarations") },
1302 { "-Wno-implicit-function-declaration", "" },
1303 { "-Werror-implicit-function-declaration", "" },
1305 N_("Warn when a declaration does not specify a type") },
1306 { "-Wno-implicit-int", "" },
1307 { "-Wimplicit", "" },
1308 { "-Wno-implicit", "" },
1310 N_("Warn about the use of the #import directive") },
1311 { "-Wno-import", "" },
1312 { "-Wlong-long","" },
1314 N_("Do not warn about using 'long long' when -pedantic") },
1316 N_("Warn about suspicious declarations of main") },
1317 { "-Wno-main", "" },
1318 { "-Wmissing-braces",
1319 N_("Warn about possibly missing braces around initialisers") },
1320 { "-Wno-missing-braces", "" },
1321 { "-Wmissing-declarations",
1322 N_("Warn about global funcs without previous declarations") },
1323 { "-Wno-missing-declarations", "" },
1324 { "-Wmissing-prototypes",
1325 N_("Warn about global funcs without prototypes") },
1326 { "-Wno-missing-prototypes", "" },
1328 N_("Warn about use of multicharacter literals") },
1329 { "-Wno-multichar", "" },
1330 { "-Wnested-externs",
1331 N_("Warn about externs not at file scope level") },
1332 { "-Wno-nested-externs", "" },
1334 N_("Warn about possible missing parentheses") },
1335 { "-Wno-parentheses", "" },
1336 { "-Wsequence-point",
1337 N_("Warn about possible violations of sequence point rules") },
1338 { "-Wno-sequence-point", "" },
1339 { "-Wpointer-arith",
1340 N_("Warn about function pointer arithmetic") },
1341 { "-Wno-pointer-arith", "" },
1342 { "-Wredundant-decls",
1343 N_("Warn about multiple declarations of the same object") },
1344 { "-Wno-redundant-decls", "" },
1346 N_("Warn about signed/unsigned comparisons") },
1347 { "-Wno-sign-compare", "" },
1349 N_("Warn about testing equality of floating point numbers") },
1350 { "-Wno-float-equal", "" },
1351 { "-Wunknown-pragmas",
1352 N_("Warn about unrecognized pragmas") },
1353 { "-Wno-unknown-pragmas", "" },
1354 { "-Wstrict-prototypes",
1355 N_("Warn about non-prototyped function decls") },
1356 { "-Wno-strict-prototypes", "" },
1358 N_("Warn about constructs whose meaning change in ISO C") },
1359 { "-Wno-traditional", "" },
1361 N_("Warn when trigraphs are encountered") },
1362 { "-Wno-trigraphs", "" },
1364 { "-Wno-undef", "" },
1365 { "-Wwrite-strings",
1366 N_("Mark strings as 'const char *'") },
1367 { "-Wno-write-strings", "" },
1369 #define DEFINE_LANG_NAME(NAME) { NULL, NAME },
1371 #include "options.h"
1375 /* Here is a table, controlled by the tm.h file, listing each -m switch
1376 and which bits in `target_switches' it should set or clear.
1377 If VALUE is positive, it is bits to set.
1378 If VALUE is negative, -VALUE is bits to clear.
1379 (The sign bit is not used so there is no confusion.) */
1385 const char *description
;
1387 target_switches
[] = TARGET_SWITCHES
;
1389 /* This table is similar, but allows the switch to have a value. */
1391 #ifdef TARGET_OPTIONS
1395 const char **variable
;
1396 const char *description
;
1398 target_options
[] = TARGET_OPTIONS
;
1401 /* Options controlling warnings. */
1403 /* Don't print warning messages. -w. */
1405 int inhibit_warnings
= 0;
1407 /* Don't suppress warnings from system headers. -Wsystem-headers. */
1409 int warn_system_headers
= 0;
1411 /* Print various extra warnings. -W. */
1413 int extra_warnings
= 0;
1415 /* Treat warnings as errors. -Werror. */
1417 int warnings_are_errors
= 0;
1419 /* Nonzero to warn about unused variables, functions et.al. */
1421 int warn_unused_function
;
1422 int warn_unused_label
;
1423 int warn_unused_parameter
;
1424 int warn_unused_variable
;
1425 int warn_unused_value
;
1428 set_Wunused (setting
)
1431 warn_unused_function
= setting
;
1432 warn_unused_label
= setting
;
1433 /* Unused function parameter warnings are reported when either ``-W
1434 -Wunused'' or ``-Wunused-parameter'' is specified. Differentiate
1435 -Wunused by setting WARN_UNUSED_PARAMETER to -1. */
1437 warn_unused_parameter
= 0;
1438 else if (!warn_unused_parameter
)
1439 warn_unused_parameter
= -1;
1440 warn_unused_variable
= setting
;
1441 warn_unused_value
= setting
;
1444 /* Nonzero to warn about code which is never reached. */
1446 int warn_notreached
;
1448 /* Nonzero to warn about variables used before they are initialized. */
1450 int warn_uninitialized
;
1452 /* Nonzero means warn about all declarations which shadow others. */
1456 /* Warn if a switch on an enum fails to have a case for every enum value. */
1460 /* Nonzero means warn about function definitions that default the return type
1461 or that use a null return and have a return-type other than void. */
1463 int warn_return_type
;
1465 /* Nonzero means warn about pointer casts that increase the required
1466 alignment of the target type (and might therefore lead to a crash
1467 due to a misaligned access). */
1469 int warn_cast_align
;
1471 /* Nonzero means warn about any objects definitions whose size is larger
1472 than N bytes. Also want about function definitions whose returned
1473 values are larger than N bytes. The value N is in `larger_than_size'. */
1475 int warn_larger_than
;
1476 HOST_WIDE_INT larger_than_size
;
1478 /* Nonzero means warn if inline function is too large. */
1482 /* Warn if a function returns an aggregate,
1483 since there are often incompatible calling conventions for doing this. */
1485 int warn_aggregate_return
;
1487 /* Warn if packed attribute on struct is unnecessary and inefficient. */
1491 /* Warn when gcc pads a structure to an alignment boundary. */
1495 /* Warn when an optimization pass is disabled. */
1497 int warn_disabled_optimization
;
1499 /* Warn about functions which might be candidates for attribute noreturn. */
1501 int warn_missing_noreturn
;
1503 /* Likewise for -W. */
1505 lang_independent_options W_options
[] =
1507 {"unused-function", &warn_unused_function
, 1,
1508 N_("Warn when a function is unused") },
1509 {"unused-label", &warn_unused_label
, 1,
1510 N_("Warn when a label is unused") },
1511 {"unused-parameter", &warn_unused_parameter
, 1,
1512 N_("Warn when a function parameter is unused") },
1513 {"unused-variable", &warn_unused_variable
, 1,
1514 N_("Warn when a variable is unused") },
1515 {"unused-value", &warn_unused_value
, 1,
1516 N_("Warn when an expression value is unused") },
1517 {"system-headers", &warn_system_headers
, 1,
1518 N_("Do not suppress warnings from system headers") },
1519 {"error", &warnings_are_errors
, 1,
1520 N_("Treat all warnings as errors") },
1521 {"shadow", &warn_shadow
, 1,
1522 N_("Warn when one local variable shadows another") },
1523 {"switch", &warn_switch
, 1,
1524 N_("Warn about enumerated switches missing a specific case") },
1525 {"aggregate-return", &warn_aggregate_return
, 1,
1526 N_("Warn about returning structures, unions or arrays") },
1527 {"cast-align", &warn_cast_align
, 1,
1528 N_("Warn about pointer casts which increase alignment") },
1529 {"unreachable-code", &warn_notreached
, 1,
1530 N_("Warn about code that will never be executed") },
1531 {"uninitialized", &warn_uninitialized
, 1,
1532 N_("Warn about unitialized automatic variables") },
1533 {"inline", &warn_inline
, 1,
1534 N_("Warn when an inlined function cannot be inlined") },
1535 {"packed", &warn_packed
, 1,
1536 N_("Warn when the packed attribute has no effect on struct layout") },
1537 {"padded", &warn_padded
, 1,
1538 N_("Warn when padding is required to align struct members") },
1539 {"disabled-optimization", &warn_disabled_optimization
, 1,
1540 N_("Warn when an optimization pass is disabled") },
1541 {"missing-noreturn", &warn_missing_noreturn
, 1,
1542 N_("Warn about functions which might be candidates for attribute noreturn") }
1545 /* The following routines are useful in setting all the flags that
1546 -ffast-math and -fno-fast-math imply. */
1549 set_fast_math_flags ()
1551 flag_trapping_math
= 0;
1552 flag_unsafe_math_optimizations
= 1;
1553 flag_errno_math
= 0;
1557 set_no_fast_math_flags ()
1559 flag_trapping_math
= 1;
1560 flag_unsafe_math_optimizations
= 0;
1561 flag_errno_math
= 1;
1565 /* Output files for assembler code (real compiler output)
1566 and debugging dumps. */
1569 FILE *aux_info_file
;
1570 FILE *rtl_dump_file
= NULL
;
1572 /* Decode the string P as an integral parameter.
1573 If the string is indeed an integer return its numeric value else
1574 issue an Invalid Option error for the option PNAME and return DEFVAL.
1575 If PNAME is zero just return DEFVAL, do not call error. */
1578 read_integral_parameter (p
, pname
, defval
)
1583 const char *endp
= p
;
1587 if (*endp
>= '0' && *endp
<= '9')
1596 error ("Invalid option `%s'", pname
);
1604 /* This is the default decl_printable_name function. */
1607 decl_name (decl
, verbosity
)
1609 int verbosity ATTRIBUTE_UNUSED
;
1611 return IDENTIFIER_POINTER (DECL_NAME (decl
));
1615 /* This calls abort and is used to avoid problems when abort if a macro.
1616 It is used when we need to pass the address of abort. */
1624 /* When `malloc.c' is compiled with `rcheck' defined,
1625 it calls this function to report clobberage. */
1629 const char *s ATTRIBUTE_UNUSED
;
1634 /* Return the logarithm of X, base 2, considering X unsigned,
1635 if X is a power of 2. Otherwise, returns -1.
1637 This should be used via the `exact_log2' macro. */
1641 register unsigned HOST_WIDE_INT x
;
1643 register int log
= 0;
1644 /* Test for 0 or a power of 2. */
1645 if (x
== 0 || x
!= (x
& -x
))
1647 while ((x
>>= 1) != 0)
1652 /* Given X, an unsigned number, return the largest int Y such that 2**Y <= X.
1653 If X is 0, return -1.
1655 This should be used via the floor_log2 macro. */
1659 register unsigned HOST_WIDE_INT x
;
1661 register int log
= -1;
1668 static int float_handler_set
;
1670 jmp_buf float_handler
;
1672 /* Signals actually come here. */
1675 float_signal (signo
)
1676 /* If this is missing, some compilers complain. */
1677 int signo ATTRIBUTE_UNUSED
;
1679 if (float_handled
== 0)
1680 crash_signal (signo
);
1683 /* On System-V derived systems, we must reinstall the signal handler.
1684 This is harmless on BSD-derived systems. */
1685 signal (SIGFPE
, float_signal
);
1686 longjmp (float_handler
, 1);
1689 /* Specify where to longjmp to when a floating arithmetic error happens.
1690 If HANDLER is 0, it means don't handle the errors any more. */
1693 set_float_handler (handler
)
1696 float_handled
= (handler
!= 0);
1698 memcpy (float_handler
, handler
, sizeof (float_handler
));
1700 if (float_handled
&& ! float_handler_set
)
1702 signal (SIGFPE
, float_signal
);
1703 float_handler_set
= 1;
1707 /* This is a wrapper function for code which might elicit an
1708 arithmetic exception. That code should be passed in as a function
1709 pointer FN, and one argument DATA. DATA is usually a struct which
1710 contains the real input and output for function FN. This function
1711 returns 0 (failure) if longjmp was called (i.e. an exception
1712 occured.) It returns 1 (success) otherwise. */
1715 do_float_handler (fn
, data
)
1716 void (*fn
) PARAMS ((PTR
));
1723 /* We got here via longjmp () caused by an exception in function
1725 set_float_handler (NULL
);
1729 set_float_handler (buf
);
1731 set_float_handler (NULL
);
1735 /* Handler for fatal signals, such as SIGSEGV. These are transformed
1736 into ICE messages, which is much more user friendly. */
1739 crash_signal (signo
)
1742 internal_error ("Internal error: %s", strsignal (signo
));
1745 /* Strip off a legitimate source ending from the input string NAME of
1746 length LEN. Rather than having to know the names used by all of
1747 our front ends, we strip off an ending of a period followed by
1748 up to five characters. (Java uses ".class".) */
1751 strip_off_ending (name
, len
)
1756 for (i
= 2; i
< 6 && len
> i
; i
++)
1758 if (name
[len
- i
] == '.')
1760 name
[len
- i
] = '\0';
1766 /* Output a quoted string. */
1769 output_quoted_string (asm_file
, string
)
1773 #ifdef OUTPUT_QUOTED_STRING
1774 OUTPUT_QUOTED_STRING (asm_file
, string
);
1778 putc ('\"', asm_file
);
1779 while ((c
= *string
++) != 0)
1781 if (c
== '\"' || c
== '\\')
1782 putc ('\\', asm_file
);
1785 putc ('\"', asm_file
);
1789 /* Output a file name in the form wanted by System V. */
1792 output_file_directive (asm_file
, input_name
)
1794 const char *input_name
;
1796 int len
= strlen (input_name
);
1797 const char *na
= input_name
+ len
;
1799 /* NA gets INPUT_NAME sans directory names. */
1800 while (na
> input_name
)
1802 if (IS_DIR_SEPARATOR (na
[-1]))
1807 #ifdef ASM_OUTPUT_MAIN_SOURCE_FILENAME
1808 ASM_OUTPUT_MAIN_SOURCE_FILENAME (asm_file
, na
);
1810 #ifdef ASM_OUTPUT_SOURCE_FILENAME
1811 ASM_OUTPUT_SOURCE_FILENAME (asm_file
, na
);
1813 fprintf (asm_file
, "\t.file\t");
1814 output_quoted_string (asm_file
, na
);
1815 fputc ('\n', asm_file
);
1820 /* Routine to open a dump file. Return true if the dump file is enabled. */
1823 open_dump_file (index
, decl
)
1824 enum dump_file_index index
;
1828 const char *open_arg
;
1831 if (! dump_file
[index
].enabled
)
1834 timevar_push (TV_DUMP
);
1835 if (rtl_dump_file
!= NULL
)
1836 fclose (rtl_dump_file
);
1838 sprintf (seq
, ".%02d.", index
);
1840 if (! dump_file
[index
].initialized
)
1842 /* If we've not initialized the files, do so now. */
1843 if (graph_dump_format
!= no_graph
1844 && dump_file
[index
].graph_dump_p
)
1846 dump_name
= concat (seq
, dump_file
[index
].extension
, NULL
);
1847 clean_graph_dump_file (dump_base_name
, dump_name
);
1850 dump_file
[index
].initialized
= 1;
1856 dump_name
= concat (dump_base_name
, seq
,
1857 dump_file
[index
].extension
, NULL
);
1859 rtl_dump_file
= fopen (dump_name
, open_arg
);
1860 if (rtl_dump_file
== NULL
)
1861 fatal_io_error ("can't open %s", dump_name
);
1866 fprintf (rtl_dump_file
, "\n;; Function %s\n\n",
1867 decl_printable_name (decl
, 2));
1869 timevar_pop (TV_DUMP
);
1873 /* Routine to close a dump file. */
1876 close_dump_file (index
, func
, insns
)
1877 enum dump_file_index index
;
1878 void (*func
) PARAMS ((FILE *, rtx
));
1881 if (! rtl_dump_file
)
1884 timevar_push (TV_DUMP
);
1886 && graph_dump_format
!= no_graph
1887 && dump_file
[index
].graph_dump_p
)
1892 sprintf (seq
, ".%02d.", index
);
1893 suffix
= concat (seq
, dump_file
[index
].extension
, NULL
);
1894 print_rtl_graph_with_bb (dump_base_name
, suffix
, insns
);
1899 func (rtl_dump_file
, insns
);
1901 fflush (rtl_dump_file
);
1902 fclose (rtl_dump_file
);
1904 rtl_dump_file
= NULL
;
1905 timevar_pop (TV_DUMP
);
1908 /* Do any final processing required for the declarations in VEC, of
1909 which there are LEN. We write out inline functions and variables
1910 that have been deferred until this point, but which are required.
1911 Returns non-zero if anything was put out. */
1914 wrapup_global_declarations (vec
, len
)
1921 int output_something
= 0;
1923 for (i
= 0; i
< len
; i
++)
1927 /* We're not deferring this any longer. */
1928 DECL_DEFER_OUTPUT (decl
) = 0;
1930 if (TREE_CODE (decl
) == VAR_DECL
&& DECL_SIZE (decl
) == 0
1931 && incomplete_decl_finalize_hook
!= 0)
1932 (*incomplete_decl_finalize_hook
) (decl
);
1935 /* Now emit any global variables or functions that we have been
1936 putting off. We need to loop in case one of the things emitted
1937 here references another one which comes earlier in the list. */
1941 for (i
= 0; i
< len
; i
++)
1945 if (TREE_ASM_WRITTEN (decl
) || DECL_EXTERNAL (decl
))
1948 /* Don't write out static consts, unless we still need them.
1950 We also keep static consts if not optimizing (for debugging),
1951 unless the user specified -fno-keep-static-consts.
1952 ??? They might be better written into the debug information.
1953 This is possible when using DWARF.
1955 A language processor that wants static constants to be always
1956 written out (even if it is not used) is responsible for
1957 calling rest_of_decl_compilation itself. E.g. the C front-end
1958 calls rest_of_decl_compilation from finish_decl.
1959 One motivation for this is that is conventional in some
1960 environments to write things like:
1961 static const char rcsid[] = "... version string ...";
1962 intending to force the string to be in the executable.
1964 A language processor that would prefer to have unneeded
1965 static constants "optimized away" would just defer writing
1966 them out until here. E.g. C++ does this, because static
1967 constants are often defined in header files.
1969 ??? A tempting alternative (for both C and C++) would be
1970 to force a constant to be written if and only if it is
1971 defined in a main file, as opposed to an include file. */
1973 if (TREE_CODE (decl
) == VAR_DECL
&& TREE_STATIC (decl
)
1974 && (((! TREE_READONLY (decl
) || TREE_PUBLIC (decl
))
1975 && !DECL_COMDAT (decl
))
1977 && flag_keep_static_consts
1978 && !DECL_ARTIFICIAL (decl
))
1979 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl
))))
1982 rest_of_decl_compilation (decl
, NULL
, 1, 1);
1985 if (TREE_CODE (decl
) == FUNCTION_DECL
1986 && DECL_INITIAL (decl
) != 0
1987 && DECL_SAVED_INSNS (decl
) != 0
1988 && (flag_keep_inline_functions
1989 || (TREE_PUBLIC (decl
) && !DECL_COMDAT (decl
))
1990 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl
))))
1993 output_inline_function (decl
);
1998 output_something
= 1;
2002 return output_something
;
2005 /* Issue appropriate warnings for the global declarations in VEC (of
2006 which there are LEN). Output debugging information for them. */
2009 check_global_declarations (vec
, len
)
2016 for (i
= 0; i
< len
; i
++)
2020 if (TREE_CODE (decl
) == VAR_DECL
&& TREE_STATIC (decl
)
2021 && ! TREE_ASM_WRITTEN (decl
))
2022 /* Cancel the RTL for this decl so that, if debugging info
2023 output for global variables is still to come,
2024 this one will be omitted. */
2025 SET_DECL_RTL (decl
, NULL_RTX
);
2027 /* Warn about any function
2028 declared static but not defined.
2029 We don't warn about variables,
2030 because many programs have static variables
2031 that exist only to get some text into the object file. */
2032 if (TREE_CODE (decl
) == FUNCTION_DECL
2033 && (warn_unused_function
2034 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl
)))
2035 && DECL_INITIAL (decl
) == 0
2036 && DECL_EXTERNAL (decl
)
2037 && ! DECL_ARTIFICIAL (decl
)
2038 && ! TREE_PUBLIC (decl
))
2040 if (TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl
)))
2041 pedwarn_with_decl (decl
,
2042 "`%s' used but never defined");
2044 warning_with_decl (decl
,
2045 "`%s' declared `static' but never defined");
2046 /* This symbol is effectively an "extern" declaration now. */
2047 TREE_PUBLIC (decl
) = 1;
2048 assemble_external (decl
);
2051 /* Warn about static fns or vars defined but not used,
2052 but not about inline functions or static consts
2053 since defining those in header files is normal practice. */
2054 if (((warn_unused_function
2055 && TREE_CODE (decl
) == FUNCTION_DECL
&& ! DECL_INLINE (decl
))
2056 || (warn_unused_variable
2057 && TREE_CODE (decl
) == VAR_DECL
&& ! TREE_READONLY (decl
)))
2058 && ! DECL_IN_SYSTEM_HEADER (decl
)
2059 && ! DECL_EXTERNAL (decl
)
2060 && ! TREE_PUBLIC (decl
)
2061 && ! TREE_USED (decl
)
2062 && (TREE_CODE (decl
) == FUNCTION_DECL
|| ! DECL_REGISTER (decl
))
2063 /* The TREE_USED bit for file-scope decls
2064 is kept in the identifier, to handle multiple
2065 external decls in different scopes. */
2066 && ! TREE_USED (DECL_NAME (decl
)))
2067 warning_with_decl (decl
, "`%s' defined but not used");
2069 timevar_push (TV_SYMOUT
);
2070 (*debug_hooks
->global_decl
) (decl
);
2071 timevar_pop (TV_SYMOUT
);
2075 /* Save the current INPUT_FILENAME and LINENO on the top entry in the
2076 INPUT_FILE_STACK. Push a new entry for FILE and LINE, and set the
2077 INPUT_FILENAME and LINENO accordingly. */
2080 push_srcloc (file
, line
)
2084 struct file_stack
*fs
;
2086 if (input_file_stack
)
2088 input_file_stack
->name
= input_filename
;
2089 input_file_stack
->line
= lineno
;
2092 fs
= (struct file_stack
*) xmalloc (sizeof (struct file_stack
));
2093 fs
->name
= input_filename
= file
;
2094 fs
->line
= lineno
= line
;
2095 fs
->indent_level
= 0;
2096 fs
->next
= input_file_stack
;
2097 input_file_stack
= fs
;
2098 input_file_stack_tick
++;
2101 /* Pop the top entry off the stack of presently open source files.
2102 Restore the INPUT_FILENAME and LINENO from the new topmost entry on
2108 struct file_stack
*fs
;
2110 fs
= input_file_stack
;
2111 input_file_stack
= fs
->next
;
2113 input_file_stack_tick
++;
2114 /* The initial source file is never popped. */
2115 if (!input_file_stack
)
2117 input_filename
= input_file_stack
->name
;
2118 lineno
= input_file_stack
->line
;
2121 /* Compile an entire file of output from cpp, named NAME.
2122 Write a file of assembly output and various debugging dumps. */
2130 int name_specified
= name
!= 0;
2132 if (dump_base_name
== 0)
2133 dump_base_name
= name
? name
: "gccdump";
2138 /* Start timing total execution time. */
2141 timevar_start (TV_TOTAL
);
2143 /* Open assembler code output file. Do this even if -fsyntax-only is on,
2144 because then the driver will have provided the name of a temporary
2145 file or bit bucket for us. */
2147 if (! name_specified
&& asm_file_name
== 0)
2148 asm_out_file
= stdout
;
2151 if (asm_file_name
== 0)
2153 int len
= strlen (dump_base_name
);
2154 char *dumpname
= (char *) xmalloc (len
+ 6);
2155 memcpy (dumpname
, dump_base_name
, len
+ 1);
2156 strip_off_ending (dumpname
, len
);
2157 strcat (dumpname
, ".s");
2158 asm_file_name
= dumpname
;
2160 if (!strcmp (asm_file_name
, "-"))
2161 asm_out_file
= stdout
;
2163 asm_out_file
= fopen (asm_file_name
, "w");
2164 if (asm_out_file
== 0)
2165 fatal_io_error ("can't open %s for writing", asm_file_name
);
2168 /* Initialize data in various passes. */
2171 name
= init_parse (name
);
2172 init_emit_once (debug_info_level
== DINFO_LEVEL_NORMAL
2173 || debug_info_level
== DINFO_LEVEL_VERBOSE
2174 || flag_test_coverage
2175 || warn_notreached
);
2178 init_decl_processing ();
2184 init_function_once ();
2185 init_stor_layout_once ();
2186 init_varasm_once ();
2187 init_EXPR_INSN_LIST_cache ();
2189 /* The following initialization functions need to generate rtl, so
2190 provide a dummy function context for them. */
2191 init_dummy_function_start ();
2194 if (flag_caller_saves
)
2195 init_caller_save ();
2196 expand_dummy_function_end ();
2198 /* If auxiliary info generation is desired, open the output file.
2199 This goes in the same directory as the source file--unlike
2200 all the other output files. */
2201 if (flag_gen_aux_info
)
2203 aux_info_file
= fopen (aux_info_file_name
, "w");
2204 if (aux_info_file
== 0)
2205 fatal_io_error ("can't open %s", aux_info_file_name
);
2208 #ifdef IO_BUFFER_SIZE
2209 setvbuf (asm_out_file
, (char *) xmalloc (IO_BUFFER_SIZE
),
2210 _IOFBF
, IO_BUFFER_SIZE
);
2214 name
= ggc_strdup (name
);
2216 input_filename
= name
;
2218 /* Put an entry on the input file stack for the main input file. */
2219 push_srcloc (input_filename
, 0);
2221 /* Perform language-specific initialization.
2222 This may set main_input_filename. */
2223 if (lang_hooks
.init
)
2224 (*lang_hooks
.init
) ();
2226 /* If the input doesn't start with a #line, use the input name
2227 as the official input file name. */
2228 if (main_input_filename
== 0)
2229 main_input_filename
= name
;
2231 if (flag_syntax_only
)
2233 write_symbols
= NO_DEBUG
;
2235 profile_block_flag
= 0;
2239 #ifdef ASM_FILE_START
2240 ASM_FILE_START (asm_out_file
);
2243 #ifdef ASM_COMMENT_START
2244 if (flag_verbose_asm
)
2246 /* Print the list of options in effect. */
2247 print_version (asm_out_file
, ASM_COMMENT_START
);
2248 print_switch_values (asm_out_file
, 0, MAX_LINE
,
2249 ASM_COMMENT_START
, " ", "\n");
2250 /* Add a blank line here so it appears in assembler output but not
2252 fprintf (asm_out_file
, "\n");
2255 } /* ! flag_syntax_only */
2257 /* Set up the debug hooks based on write_symbols. Default to doing
2259 debug_hooks
= &do_nothing_debug_hooks
;
2260 #if defined(DBX_DEBUGGING_INFO)
2261 if (write_symbols
== DBX_DEBUG
)
2262 debug_hooks
= &dbx_debug_hooks
;
2264 #if defined(XCOFF_DEBUGGING_INFO)
2265 if (write_symbols
== XCOFF_DEBUG
)
2266 debug_hooks
= &xcoff_debug_hooks
;
2268 #ifdef SDB_DEBUGGING_INFO
2269 if (write_symbols
== SDB_DEBUG
)
2270 debug_hooks
= &sdb_debug_hooks
;
2272 #ifdef DWARF_DEBUGGING_INFO
2273 if (write_symbols
== DWARF_DEBUG
)
2274 debug_hooks
= &dwarf_debug_hooks
;
2276 #ifdef DWARF2_DEBUGGING_INFO
2277 if (write_symbols
== DWARF2_DEBUG
)
2278 debug_hooks
= &dwarf2_debug_hooks
;
2281 if (! targetm
.have_named_sections
)
2283 if (flag_function_sections
)
2285 warning ("-ffunction-sections not supported for this target.");
2286 flag_function_sections
= 0;
2288 if (flag_data_sections
)
2290 warning ("-fdata-sections not supported for this target.");
2291 flag_data_sections
= 0;
2295 if (flag_function_sections
2296 && (profile_flag
|| profile_block_flag
))
2298 warning ("-ffunction-sections disabled; it makes profiling impossible.");
2299 flag_function_sections
= 0;
2302 #ifndef OBJECT_FORMAT_ELF
2303 if (flag_function_sections
&& write_symbols
!= NO_DEBUG
)
2304 warning ("-ffunction-sections may affect debugging on some targets.");
2307 /* If dbx symbol table desired, initialize writing it
2308 and output the predefined types. */
2309 timevar_push (TV_SYMOUT
);
2310 #ifdef DWARF2_UNWIND_INFO
2311 if (dwarf2out_do_frame ())
2312 dwarf2out_frame_init ();
2315 (*debug_hooks
->init
) (main_input_filename
);
2316 timevar_pop (TV_SYMOUT
);
2318 /* Initialize yet another pass. */
2320 init_final (main_input_filename
);
2321 init_branch_prob (dump_base_name
);
2323 timevar_push (TV_PARSE
);
2325 /* Call the parser, which parses the entire file
2326 (calling rest_of_compilation for each function). */
2328 if (yyparse () != 0)
2330 if (errorcount
== 0)
2331 fnotice (stderr
, "Errors detected in input file (your bison.simple is out of date)\n");
2333 /* In case there were missing closebraces,
2334 get us back to the global binding level. */
2335 while (! global_bindings_p ())
2339 /* Compilation is now finished except for writing
2340 what's left of the symbol table output. */
2342 timevar_pop (TV_PARSE
);
2344 if (flag_syntax_only
)
2347 globals
= getdecls ();
2349 /* Really define vars that have had only a tentative definition.
2350 Really output inline functions that must actually be callable
2351 and have not been output so far. */
2354 int len
= list_length (globals
);
2355 tree
*vec
= (tree
*) xmalloc (sizeof (tree
) * len
);
2359 /* Process the decls in reverse order--earliest first.
2360 Put them into VEC from back to front, then take out from front. */
2362 for (i
= 0, decl
= globals
; i
< len
; i
++, decl
= TREE_CHAIN (decl
))
2363 vec
[len
- i
- 1] = decl
;
2365 wrapup_global_declarations (vec
, len
);
2367 /* This must occur after the loop to output deferred functions. Else
2368 the profiler initializer would not be emitted if all the functions
2369 in this compilation unit were deferred.
2371 output_func_start_profiler can not cause any additional functions or
2372 data to need to be output, so it need not be in the deferred function
2374 output_func_start_profiler ();
2376 check_global_declarations (vec
, len
);
2382 /* Write out any pending weak symbol declarations. */
2386 /* Do dbx symbols. */
2387 timevar_push (TV_SYMOUT
);
2389 #ifdef DWARF2_UNWIND_INFO
2390 if (dwarf2out_do_frame ())
2391 dwarf2out_frame_finish ();
2394 (*debug_hooks
->finish
) (main_input_filename
);
2395 timevar_pop (TV_SYMOUT
);
2397 /* Output some stuff at end of file if nec. */
2399 dw2_output_indirect_constants ();
2401 end_final (dump_base_name
);
2403 if (profile_arc_flag
|| flag_test_coverage
|| flag_branch_probabilities
)
2405 timevar_push (TV_DUMP
);
2406 open_dump_file (DFI_bp
, NULL
);
2410 close_dump_file (DFI_bp
, NULL
, NULL_RTX
);
2411 timevar_pop (TV_DUMP
);
2415 ASM_FILE_END (asm_out_file
);
2418 /* Attach a special .ident directive to the end of the file to identify
2419 the version of GCC which compiled this code. The format of the .ident
2420 string is patterned after the ones produced by native SVR4 compilers. */
2423 fprintf (asm_out_file
, "%s\"GCC: (GNU) %s\"\n",
2424 IDENT_ASM_OP
, version_string
);
2427 /* Language-specific end of compilation actions. */
2429 if (lang_hooks
.finish
)
2430 (*lang_hooks
.finish
) ();
2432 /* Close the dump files. */
2434 if (flag_gen_aux_info
)
2436 fclose (aux_info_file
);
2438 unlink (aux_info_file_name
);
2441 if (optimize
> 0 && open_dump_file (DFI_combine
, NULL
))
2443 timevar_push (TV_DUMP
);
2444 dump_combine_total_stats (rtl_dump_file
);
2445 close_dump_file (DFI_combine
, NULL
, NULL_RTX
);
2446 timevar_pop (TV_DUMP
);
2449 /* Close non-debugging input and output files. Take special care to note
2450 whether fclose returns an error, since the pages might still be on the
2451 buffer chain while the file is open. */
2455 if (ferror (asm_out_file
) != 0)
2456 fatal_io_error ("error writing to %s", asm_file_name
);
2457 if (fclose (asm_out_file
) != 0)
2458 fatal_io_error ("error closing %s", asm_file_name
);
2460 /* Do whatever is necessary to finish printing the graphs. */
2461 if (graph_dump_format
!= no_graph
)
2465 for (i
= 0; i
< (int) DFI_MAX
; ++i
)
2466 if (dump_file
[i
].initialized
&& dump_file
[i
].graph_dump_p
)
2471 sprintf (seq
, ".%02d.", i
);
2472 suffix
= concat (seq
, dump_file
[i
].extension
, NULL
);
2473 finish_graph_dump_file (dump_base_name
, suffix
);
2480 ggc_print_statistics ();
2481 stringpool_statistics ();
2484 /* Free up memory for the benefit of leak detectors. */
2487 /* Stop timing total execution time. */
2488 timevar_stop (TV_TOTAL
);
2490 /* Print the times. */
2492 timevar_print (stderr
);
2495 /* This is called from various places for FUNCTION_DECL, VAR_DECL,
2496 and TYPE_DECL nodes.
2498 This does nothing for local (non-static) variables, unless the
2499 variable is a register variable with an ASMSPEC. In that case, or
2500 if the variable is not an automatic, it sets up the RTL and
2501 outputs any assembler code (label definition, storage allocation
2502 and initialization).
2504 DECL is the declaration. If ASMSPEC is nonzero, it specifies
2505 the assembler symbol name to be used. TOP_LEVEL is nonzero
2506 if this declaration is not within a function. */
2509 rest_of_decl_compilation (decl
, asmspec
, top_level
, at_end
)
2511 const char *asmspec
;
2515 /* Declarations of variables, and of functions defined elsewhere. */
2517 /* The most obvious approach, to put an #ifndef around where
2518 this macro is used, doesn't work since it's inside a macro call. */
2519 #ifndef ASM_FINISH_DECLARE_OBJECT
2520 #define ASM_FINISH_DECLARE_OBJECT(FILE, DECL, TOP, END)
2523 /* Forward declarations for nested functions are not "external",
2524 but we need to treat them as if they were. */
2525 if (TREE_STATIC (decl
) || DECL_EXTERNAL (decl
)
2526 || TREE_CODE (decl
) == FUNCTION_DECL
)
2528 timevar_push (TV_VARCONST
);
2530 make_decl_rtl (decl
, asmspec
);
2531 /* Don't output anything
2532 when a tentative file-scope definition is seen.
2533 But at end of compilation, do output code for them. */
2534 if (at_end
|| !DECL_DEFER_OUTPUT (decl
))
2535 assemble_variable (decl
, top_level
, at_end
, 0);
2536 if (decl
== last_assemble_variable_decl
)
2538 ASM_FINISH_DECLARE_OBJECT (asm_out_file
, decl
,
2541 timevar_pop (TV_VARCONST
);
2543 else if (DECL_REGISTER (decl
) && asmspec
!= 0)
2545 if (decode_reg_name (asmspec
) >= 0)
2547 SET_DECL_RTL (decl
, NULL_RTX
);
2548 make_decl_rtl (decl
, asmspec
);
2552 error ("invalid register name `%s' for register variable", asmspec
);
2553 DECL_REGISTER (decl
) = 0;
2558 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
2559 else if ((write_symbols
== DBX_DEBUG
|| write_symbols
== XCOFF_DEBUG
)
2560 && TREE_CODE (decl
) == TYPE_DECL
)
2562 timevar_push (TV_SYMOUT
);
2563 dbxout_symbol (decl
, 0);
2564 timevar_pop (TV_SYMOUT
);
2567 #ifdef SDB_DEBUGGING_INFO
2568 else if (write_symbols
== SDB_DEBUG
&& top_level
2569 && TREE_CODE (decl
) == TYPE_DECL
)
2571 timevar_push (TV_SYMOUT
);
2572 sdbout_symbol (decl
, 0);
2573 timevar_pop (TV_SYMOUT
);
2578 /* Called after finishing a record, union or enumeral type. */
2581 rest_of_type_compilation (type
, toplev
)
2582 #if defined(DBX_DEBUGGING_INFO) || defined(XCOFF_DEBUGGING_INFO) || defined (SDB_DEBUGGING_INFO)
2586 tree type ATTRIBUTE_UNUSED
;
2587 int toplev ATTRIBUTE_UNUSED
;
2590 timevar_push (TV_SYMOUT
);
2591 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
2592 if (write_symbols
== DBX_DEBUG
|| write_symbols
== XCOFF_DEBUG
)
2593 dbxout_symbol (TYPE_STUB_DECL (type
), !toplev
);
2595 #ifdef SDB_DEBUGGING_INFO
2596 if (write_symbols
== SDB_DEBUG
)
2597 sdbout_symbol (TYPE_STUB_DECL (type
), !toplev
);
2599 #ifdef DWARF2_DEBUGGING_INFO
2600 if (write_symbols
== DWARF2_DEBUG
&& toplev
)
2601 dwarf2out_decl (TYPE_STUB_DECL (type
));
2603 timevar_pop (TV_SYMOUT
);
2606 /* This is called from finish_function (within yyparse)
2607 after each top-level definition is parsed.
2608 It is supposed to compile that function or variable
2609 and output the assembler code for it.
2610 After we return, the tree storage is freed. */
2613 rest_of_compilation (decl
)
2619 int rebuild_label_notes_after_reload
;
2620 int register_life_up_to_date
;
2622 timevar_push (TV_REST_OF_COMPILATION
);
2624 /* Now that we're out of the frontend, we shouldn't have any more
2625 CONCATs anywhere. */
2626 generating_concat_p
= 0;
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
)
2649 /* If we are reconsidering an inline function
2650 at the end of compilation, skip the stuff for making it inline. */
2652 if (DECL_SAVED_INSNS (decl
) == 0)
2658 /* If this is nested inside an inlined external function, pretend
2659 it was only declared. Since we cannot inline such functions,
2660 generating code for this one is not only not necessary but will
2661 confuse some debugging output writers. */
2662 for (parent
= DECL_CONTEXT (current_function_decl
);
2663 parent
!= NULL_TREE
;
2664 parent
= get_containing_scope (parent
))
2665 if (TREE_CODE (parent
) == FUNCTION_DECL
2666 && DECL_INLINE (parent
) && DECL_EXTERNAL (parent
))
2668 DECL_INITIAL (decl
) = 0;
2669 goto exit_rest_of_compilation
;
2672 /* If requested, consider whether to make this function inline. */
2673 if ((DECL_INLINE (decl
) && !flag_no_inline
)
2674 || flag_inline_functions
)
2676 timevar_push (TV_INTEGRATION
);
2677 lose
= function_cannot_inline_p (decl
);
2678 timevar_pop (TV_INTEGRATION
);
2679 if (lose
|| ! optimize
)
2681 if (warn_inline
&& DECL_INLINE (decl
))
2682 warning_with_decl (decl
, lose
);
2683 DECL_ABSTRACT_ORIGIN (decl
) = 0;
2684 /* Don't really compile an extern inline function.
2685 If we can't make it inline, pretend
2686 it was only declared. */
2687 if (DECL_EXTERNAL (decl
))
2689 DECL_INITIAL (decl
) = 0;
2690 goto exit_rest_of_compilation
;
2694 /* ??? Note that this has the effect of making it look
2695 like "inline" was specified for a function if we choose
2696 to inline it. This isn't quite right, but it's
2697 probably not worth the trouble to fix. */
2698 inlinable
= DECL_INLINE (decl
) = 1;
2701 insns
= get_insns ();
2703 /* Dump the rtl code if we are dumping rtl. */
2705 if (open_dump_file (DFI_rtl
, decl
))
2707 if (DECL_SAVED_INSNS (decl
))
2708 fprintf (rtl_dump_file
, ";; (integrable)\n\n");
2709 close_dump_file (DFI_rtl
, print_rtl
, insns
);
2712 /* Convert from NOTE_INSN_EH_REGION style notes, and do other
2713 sorts of eh initialization. Delay this until after the
2714 initial rtl dump so that we can see the original nesting. */
2715 convert_from_eh_region_ranges ();
2717 /* If function is inline, and we don't yet know whether to
2718 compile it by itself, defer decision till end of compilation.
2719 finish_compilation will call rest_of_compilation again
2720 for those functions that need to be output. Also defer those
2721 functions that we are supposed to defer. */
2724 || (DECL_INLINE (decl
)
2725 && ((! TREE_PUBLIC (decl
) && ! TREE_ADDRESSABLE (decl
)
2726 && ! flag_keep_inline_functions
)
2727 || DECL_EXTERNAL (decl
))))
2728 DECL_DEFER_OUTPUT (decl
) = 1;
2730 if (DECL_INLINE (decl
))
2731 /* DWARF wants seperate debugging info for abstract and
2732 concrete instances of all inline functions, including those
2733 declared inline but not inlined, and those inlined even
2734 though they weren't declared inline. Conveniently, that's
2735 what DECL_INLINE means at this point. */
2736 (*debug_hooks
->deferred_inline_function
) (decl
);
2738 if (DECL_DEFER_OUTPUT (decl
))
2740 /* If -Wreturn-type, we have to do a bit of compilation. We just
2741 want to call cleanup the cfg to figure out whether or not we can
2742 fall off the end of the function; we do the minimum amount of
2743 work necessary to make that safe. */
2744 if (warn_return_type
)
2746 int saved_optimize
= optimize
;
2749 rebuild_jump_labels (insns
);
2750 find_exception_handler_labels ();
2751 find_basic_blocks (insns
, max_reg_num (), rtl_dump_file
);
2752 cleanup_cfg (CLEANUP_PRE_SIBCALL
| CLEANUP_PRE_LOOP
);
2753 optimize
= saved_optimize
;
2755 /* CFG is no longer maitained up-to-date. */
2756 free_bb_for_insn ();
2759 current_function_nothrow
= nothrow_function_p ();
2760 if (current_function_nothrow
)
2761 /* Now we know that this can't throw; set the flag for the benefit
2762 of other functions later in this translation unit. */
2763 TREE_NOTHROW (current_function_decl
) = 1;
2765 timevar_push (TV_INTEGRATION
);
2766 save_for_inline (decl
);
2767 timevar_pop (TV_INTEGRATION
);
2768 DECL_SAVED_INSNS (decl
)->inlinable
= inlinable
;
2769 goto exit_rest_of_compilation
;
2772 /* If specified extern inline but we aren't inlining it, we are
2773 done. This goes for anything that gets here with DECL_EXTERNAL
2774 set, not just things with DECL_INLINE. */
2775 if (DECL_EXTERNAL (decl
))
2776 goto exit_rest_of_compilation
;
2781 /* Initialize some variables used by the optimizers. */
2782 init_function_for_compilation ();
2784 if (! DECL_DEFER_OUTPUT (decl
))
2785 TREE_ASM_WRITTEN (decl
) = 1;
2787 /* Now that integrate will no longer see our rtl, we need not
2788 distinguish between the return value of this function and the
2789 return value of called functions. Also, we can remove all SETs
2790 of subregs of hard registers; they are only here because of
2791 integrate. Also, we can now initialize pseudos intended to
2792 carry magic hard reg data throughout the function. */
2793 rtx_equal_function_value_matters
= 0;
2794 purge_hard_subreg_sets (get_insns ());
2795 emit_initial_value_sets ();
2797 /* Don't return yet if -Wreturn-type; we need to do cleanup_cfg. */
2798 if ((rtl_dump_and_exit
|| flag_syntax_only
) && !warn_return_type
)
2799 goto exit_rest_of_compilation
;
2801 /* We may have potential sibling or tail recursion sites. Select one
2802 (of possibly multiple) methods of performing the call. */
2803 if (flag_optimize_sibling_calls
)
2805 timevar_push (TV_JUMP
);
2806 open_dump_file (DFI_sibling
, decl
);
2808 optimize_sibling_and_tail_recursive_calls ();
2810 close_dump_file (DFI_sibling
, print_rtl
, get_insns ());
2811 timevar_pop (TV_JUMP
);
2814 /* Complete generation of exception handling code. */
2815 find_exception_handler_labels ();
2818 timevar_push (TV_JUMP
);
2819 open_dump_file (DFI_eh
, decl
);
2821 finish_eh_generation ();
2823 close_dump_file (DFI_eh
, print_rtl
, get_insns ());
2824 timevar_pop (TV_JUMP
);
2828 /* If we are doing position-independent code generation, now
2829 is the time to output special prologues and epilogues.
2830 We do not want to do this earlier, because it just clutters
2831 up inline functions with meaningless insns. */
2836 insns
= get_insns ();
2838 /* Copy any shared structure that should not be shared. */
2839 unshare_all_rtl (current_function_decl
, insns
);
2841 #ifdef SETJMP_VIA_SAVE_AREA
2842 /* This must be performed before virtual register instantiation. */
2843 if (current_function_calls_alloca
)
2844 optimize_save_area_alloca (insns
);
2847 /* Instantiate all virtual registers. */
2848 instantiate_virtual_regs (current_function_decl
, insns
);
2850 open_dump_file (DFI_jump
, decl
);
2852 /* Always do one jump optimization pass to ensure that JUMP_LABEL fields
2853 are initialized and to compute whether control can drop off the end
2856 timevar_push (TV_JUMP
);
2857 /* Turn NOTE_INSN_EXPECTED_VALUE into REG_BR_PROB. Do this
2858 before jump optimization switches branch directions. */
2859 expected_value_to_br_prob ();
2861 reg_scan (insns
, max_reg_num (), 0);
2862 rebuild_jump_labels (insns
);
2863 find_basic_blocks (insns
, max_reg_num (), rtl_dump_file
);
2864 cleanup_cfg ((optimize
? CLEANUP_EXPENSIVE
: 0) | CLEANUP_PRE_LOOP
);
2866 /* CFG is no longer maitained up-to-date. */
2867 free_bb_for_insn ();
2868 copy_loop_headers (insns
);
2869 purge_line_number_notes (insns
);
2871 timevar_pop (TV_JUMP
);
2873 /* Now is when we stop if -fsyntax-only and -Wreturn-type. */
2874 if (rtl_dump_and_exit
|| flag_syntax_only
|| DECL_DEFER_OUTPUT (decl
))
2876 close_dump_file (DFI_jump
, print_rtl
, insns
);
2877 goto exit_rest_of_compilation
;
2880 /* Long term, this should probably move before the jump optimizer too,
2881 but I didn't want to disturb the rtl_dump_and_exit and related
2882 stuff at this time. */
2883 if (optimize
> 0 && flag_ssa
)
2885 /* Convert to SSA form. */
2887 timevar_push (TV_TO_SSA
);
2888 open_dump_file (DFI_ssa
, decl
);
2890 find_basic_blocks (insns
, max_reg_num (), rtl_dump_file
);
2891 cleanup_cfg (CLEANUP_EXPENSIVE
| CLEANUP_PRE_LOOP
);
2894 close_dump_file (DFI_ssa
, print_rtl_with_bb
, insns
);
2895 timevar_pop (TV_TO_SSA
);
2897 /* Perform sparse conditional constant propagation, if requested. */
2900 timevar_push (TV_SSA_CCP
);
2901 open_dump_file (DFI_ssa_ccp
, decl
);
2905 close_dump_file (DFI_ssa_ccp
, print_rtl_with_bb
, get_insns ());
2906 timevar_pop (TV_SSA_CCP
);
2909 /* It would be useful to cleanup the CFG at this point, but block
2910 merging and possibly other transformations might leave a PHI
2911 node in the middle of a basic block, which is a strict no-no. */
2913 /* The SSA implementation uses basic block numbers in its phi
2914 nodes. Thus, changing the control-flow graph or the basic
2915 blocks, e.g., calling find_basic_blocks () or cleanup_cfg (),
2916 may cause problems. */
2920 /* Remove dead code. */
2922 timevar_push (TV_SSA_DCE
);
2923 open_dump_file (DFI_ssa_dce
, decl
);
2925 insns
= get_insns ();
2926 ssa_eliminate_dead_code();
2928 close_dump_file (DFI_ssa_dce
, print_rtl_with_bb
, insns
);
2929 timevar_pop (TV_SSA_DCE
);
2932 /* Convert from SSA form. */
2934 timevar_push (TV_FROM_SSA
);
2935 open_dump_file (DFI_ussa
, decl
);
2937 convert_from_ssa ();
2938 /* New registers have been created. Rescan their usage. */
2939 reg_scan (insns
, max_reg_num (), 1);
2940 /* Life analysis used in SSA adds log_links but these
2941 shouldn't be there until the flow stage, so clear
2943 clear_log_links (insns
);
2945 close_dump_file (DFI_ussa
, print_rtl_with_bb
, insns
);
2946 timevar_pop (TV_FROM_SSA
);
2949 /* CFG is no longer maitained up-to-date. */
2950 free_bb_for_insn ();
2953 timevar_push (TV_JUMP
);
2957 find_basic_blocks (insns
, max_reg_num (), rtl_dump_file
);
2958 cleanup_cfg (CLEANUP_EXPENSIVE
| CLEANUP_PRE_LOOP
);
2960 /* ??? Run if-conversion before delete_null_pointer_checks,
2961 since the later does not preserve the CFG. This should
2962 be changed -- no since converting if's that are going to
2964 timevar_push (TV_IFCVT
);
2966 timevar_pop (TV_IFCVT
);
2968 /* CFG is no longer maitained up-to-date. */
2969 free_bb_for_insn ();
2970 /* Try to identify useless null pointer tests and delete them. */
2971 if (flag_delete_null_pointer_checks
)
2972 delete_null_pointer_checks (insns
);
2975 /* Jump optimization, and the removal of NULL pointer checks, may
2976 have reduced the number of instructions substantially. CSE, and
2977 future passes, allocate arrays whose dimensions involve the
2978 maximum instruction UID, so if we can reduce the maximum UID
2979 we'll save big on memory. */
2980 renumber_insns (rtl_dump_file
);
2981 timevar_pop (TV_JUMP
);
2983 close_dump_file (DFI_jump
, print_rtl
, insns
);
2987 /* Perform common subexpression elimination.
2988 Nonzero value from `cse_main' means that jumps were simplified
2989 and some code may now be unreachable, so do
2990 jump optimization again. */
2994 open_dump_file (DFI_cse
, decl
);
2995 timevar_push (TV_CSE
);
2997 reg_scan (insns
, max_reg_num (), 1);
2999 if (flag_thread_jumps
)
3001 timevar_push (TV_JUMP
);
3002 thread_jumps (insns
, max_reg_num (), 1);
3003 timevar_pop (TV_JUMP
);
3006 tem
= cse_main (insns
, max_reg_num (), 0, rtl_dump_file
);
3008 /* If we are not running more CSE passes, then we are no longer
3009 expecting CSE to be run. But always rerun it in a cheap mode. */
3010 cse_not_expected
= !flag_rerun_cse_after_loop
&& !flag_gcse
;
3012 if (tem
|| optimize
> 1)
3014 timevar_push (TV_JUMP
);
3015 rebuild_jump_labels (insns
);
3016 find_basic_blocks (insns
, max_reg_num (), rtl_dump_file
);
3017 cleanup_cfg (CLEANUP_EXPENSIVE
| CLEANUP_PRE_LOOP
);
3018 timevar_pop (TV_JUMP
);
3019 /* CFG is no longer maitained up-to-date. */
3020 free_bb_for_insn ();
3023 /* Run this after jump optmizations remove all the unreachable code
3024 so that unreachable code will not keep values live. */
3025 delete_trivially_dead_insns (insns
, max_reg_num (), 0);
3027 /* Try to identify useless null pointer tests and delete them. */
3028 if (flag_delete_null_pointer_checks
)
3030 timevar_push (TV_JUMP
);
3031 find_basic_blocks (insns
, max_reg_num (), rtl_dump_file
);
3033 cleanup_cfg (CLEANUP_EXPENSIVE
| CLEANUP_PRE_LOOP
);
3035 delete_null_pointer_checks (insns
);
3036 /* CFG is no longer maitained up-to-date. */
3037 free_bb_for_insn ();
3038 timevar_pop (TV_JUMP
);
3041 /* The second pass of jump optimization is likely to have
3042 removed a bunch more instructions. */
3043 renumber_insns (rtl_dump_file
);
3045 timevar_pop (TV_CSE
);
3046 close_dump_file (DFI_cse
, print_rtl
, insns
);
3049 open_dump_file (DFI_addressof
, decl
);
3051 purge_addressof (insns
);
3052 reg_scan (insns
, max_reg_num (), 1);
3054 close_dump_file (DFI_addressof
, print_rtl
, insns
);
3058 /* Perform global cse. */
3060 if (optimize
> 0 && flag_gcse
)
3062 int save_csb
, save_cfj
;
3065 timevar_push (TV_GCSE
);
3066 open_dump_file (DFI_gcse
, decl
);
3068 find_basic_blocks (insns
, max_reg_num (), rtl_dump_file
);
3069 cleanup_cfg (CLEANUP_EXPENSIVE
| CLEANUP_PRE_LOOP
);
3070 tem
= gcse_main (insns
, rtl_dump_file
);
3072 save_csb
= flag_cse_skip_blocks
;
3073 save_cfj
= flag_cse_follow_jumps
;
3074 flag_cse_skip_blocks
= flag_cse_follow_jumps
= 0;
3076 /* CFG is no longer maitained up-to-date. */
3077 free_bb_for_insn ();
3078 /* If -fexpensive-optimizations, re-run CSE to clean up things done
3080 if (flag_expensive_optimizations
)
3082 timevar_push (TV_CSE
);
3083 reg_scan (insns
, max_reg_num (), 1);
3084 tem2
= cse_main (insns
, max_reg_num (), 0, rtl_dump_file
);
3085 timevar_pop (TV_CSE
);
3086 cse_not_expected
= !flag_rerun_cse_after_loop
;
3089 /* If gcse or cse altered any jumps, rerun jump optimizations to clean
3090 things up. Then possibly re-run CSE again. */
3094 timevar_push (TV_JUMP
);
3095 rebuild_jump_labels (insns
);
3096 delete_trivially_dead_insns (insns
, max_reg_num (), 0);
3097 find_basic_blocks (insns
, max_reg_num (), rtl_dump_file
);
3098 cleanup_cfg (CLEANUP_EXPENSIVE
| CLEANUP_PRE_LOOP
);
3099 /* CFG is no longer maitained up-to-date. */
3100 free_bb_for_insn ();
3101 timevar_pop (TV_JUMP
);
3103 if (flag_expensive_optimizations
)
3105 timevar_push (TV_CSE
);
3106 reg_scan (insns
, max_reg_num (), 1);
3107 tem2
= cse_main (insns
, max_reg_num (), 0, rtl_dump_file
);
3108 timevar_pop (TV_CSE
);
3112 close_dump_file (DFI_gcse
, print_rtl
, insns
);
3113 timevar_pop (TV_GCSE
);
3116 flag_cse_skip_blocks
= save_csb
;
3117 flag_cse_follow_jumps
= save_cfj
;
3120 /* Move constant computations out of loops. */
3124 timevar_push (TV_LOOP
);
3125 open_dump_file (DFI_loop
, decl
);
3126 free_bb_for_insn ();
3128 if (flag_rerun_loop_opt
)
3130 cleanup_barriers ();
3132 /* We only want to perform unrolling once. */
3134 loop_optimize (insns
, rtl_dump_file
, 0);
3136 /* The first call to loop_optimize makes some instructions
3137 trivially dead. We delete those instructions now in the
3138 hope that doing so will make the heuristics in loop work
3139 better and possibly speed up compilation. */
3140 delete_trivially_dead_insns (insns
, max_reg_num (), 0);
3142 /* The regscan pass is currently necessary as the alias
3143 analysis code depends on this information. */
3144 reg_scan (insns
, max_reg_num (), 1);
3146 cleanup_barriers ();
3147 loop_optimize (insns
, rtl_dump_file
,
3148 (flag_unroll_loops
? LOOP_UNROLL
: 0) | LOOP_BCT
);
3150 close_dump_file (DFI_loop
, print_rtl
, insns
);
3151 timevar_pop (TV_LOOP
);
3158 timevar_push (TV_CSE2
);
3159 open_dump_file (DFI_cse2
, decl
);
3161 if (flag_rerun_cse_after_loop
)
3163 /* Running another jump optimization pass before the second
3164 cse pass sometimes simplifies the RTL enough to allow
3165 the second CSE pass to do a better job. Jump_optimize can change
3166 max_reg_num so we must rerun reg_scan afterwards.
3167 ??? Rework to not call reg_scan so often. */
3168 timevar_push (TV_JUMP
);
3170 /* The previous call to loop_optimize makes some instructions
3171 trivially dead. We delete those instructions now in the
3172 hope that doing so will make the heuristics in jump work
3173 better and possibly speed up compilation. */
3174 delete_trivially_dead_insns (insns
, max_reg_num (), 0);
3176 reg_scan (insns
, max_reg_num (), 0);
3178 timevar_push (TV_IFCVT
);
3180 find_basic_blocks (insns
, max_reg_num (), rtl_dump_file
);
3181 cleanup_cfg (CLEANUP_EXPENSIVE
);
3184 timevar_pop(TV_IFCVT
);
3186 timevar_pop (TV_JUMP
);
3188 /* CFG is no longer maitained up-to-date. */
3189 free_bb_for_insn ();
3190 reg_scan (insns
, max_reg_num (), 0);
3191 tem
= cse_main (insns
, max_reg_num (), 1, rtl_dump_file
);
3195 timevar_push (TV_JUMP
);
3196 rebuild_jump_labels (insns
);
3197 find_basic_blocks (insns
, max_reg_num (), rtl_dump_file
);
3198 cleanup_cfg (CLEANUP_EXPENSIVE
);
3199 /* CFG is no longer maitained up-to-date. */
3200 free_bb_for_insn ();
3201 timevar_pop (TV_JUMP
);
3205 if (flag_thread_jumps
)
3207 /* This pass of jump threading straightens out code
3208 that was kinked by loop optimization. */
3209 timevar_push (TV_JUMP
);
3210 reg_scan (insns
, max_reg_num (), 0);
3211 thread_jumps (insns
, max_reg_num (), 0);
3212 timevar_pop (TV_JUMP
);
3215 close_dump_file (DFI_cse2
, print_rtl
, insns
);
3216 timevar_pop (TV_CSE2
);
3221 cse_not_expected
= 1;
3225 /* Do control and data flow analysis; wrote some of the results to
3228 timevar_push (TV_FLOW
);
3229 open_dump_file (DFI_cfg
, decl
);
3231 find_basic_blocks (insns
, max_reg_num (), rtl_dump_file
);
3232 cleanup_cfg (optimize
? CLEANUP_EXPENSIVE
: 0);
3233 check_function_return_warnings ();
3235 /* It may make more sense to mark constant functions after dead code is
3236 eliminated by life_analyzis, but we need to do it early, as -fprofile-arcs
3237 may insert code making function non-constant, but we still must consider
3238 it as constant, otherwise -fbranch-probabilities will not read data back.
3240 life_analyzis rarely eliminates modification of external memory.
3242 mark_constant_function ();
3244 close_dump_file (DFI_cfg
, print_rtl_with_bb
, insns
);
3246 if (profile_arc_flag
|| flag_test_coverage
|| flag_branch_probabilities
)
3248 timevar_push (TV_BRANCH_PROB
);
3249 open_dump_file (DFI_bp
, decl
);
3253 close_dump_file (DFI_bp
, print_rtl_with_bb
, insns
);
3254 timevar_pop (TV_BRANCH_PROB
);
3257 open_dump_file (DFI_life
, decl
);
3262 /* Discover and record the loop depth at the head of each basic
3263 block. The loop infrastructure does the real job for us. */
3264 flow_loops_find (&loops
, LOOP_TREE
);
3266 /* Estimate using heuristics if no profiling info is available. */
3267 if (flag_guess_branch_prob
)
3268 estimate_probability (&loops
);
3271 flow_loops_dump (&loops
, rtl_dump_file
, NULL
, 0);
3273 flow_loops_free (&loops
);
3275 life_analysis (insns
, rtl_dump_file
, PROP_FINAL
);
3276 timevar_pop (TV_FLOW
);
3280 if (warn_uninitialized
|| extra_warnings
)
3282 uninitialized_vars_warning (DECL_INITIAL (decl
));
3284 setjmp_args_warning ();
3287 close_dump_file (DFI_life
, print_rtl_with_bb
, insns
);
3291 /* If -opt, try combining insns through substitution. */
3295 int rebuild_jump_labels_after_combine
= 0;
3297 timevar_push (TV_COMBINE
);
3298 open_dump_file (DFI_combine
, decl
);
3300 rebuild_jump_labels_after_combine
3301 = combine_instructions (insns
, max_reg_num ());
3303 /* Always purge dead edges, as we may eliminate an insn throwing
3305 rebuild_jump_labels_after_combine
|= purge_all_dead_edges ();
3307 /* Combining insns may have turned an indirect jump into a
3308 direct jump. Rebuid the JUMP_LABEL fields of jumping
3310 if (rebuild_jump_labels_after_combine
)
3312 timevar_push (TV_JUMP
);
3313 rebuild_jump_labels (insns
);
3314 timevar_pop (TV_JUMP
);
3316 timevar_push (TV_FLOW
);
3317 cleanup_cfg (CLEANUP_EXPENSIVE
);
3319 /* Blimey. We've got to have the CFG up to date for the call to
3320 if_convert below. However, the random deletion of blocks
3321 without updating life info can wind up with Wierd Stuff in
3322 global_live_at_end. We then run sched1, which updates things
3323 properly, discovers the wierdness and aborts. */
3324 allocate_bb_life_data ();
3325 update_life_info (NULL
, UPDATE_LIFE_GLOBAL_RM_NOTES
,
3326 PROP_DEATH_NOTES
| PROP_KILL_DEAD_CODE
3327 | PROP_SCAN_DEAD_CODE
);
3329 timevar_pop (TV_FLOW
);
3332 close_dump_file (DFI_combine
, print_rtl_with_bb
, insns
);
3333 timevar_pop (TV_COMBINE
);
3338 /* Rerun if-conversion, as combine may have simplified things enough to
3339 now meet sequence length restrictions. */
3342 timevar_push (TV_IFCVT
);
3343 open_dump_file (DFI_ce
, decl
);
3349 close_dump_file (DFI_ce
, print_rtl_with_bb
, insns
);
3350 timevar_pop (TV_IFCVT
);
3353 /* Register allocation pre-pass, to reduce number of moves
3354 necessary for two-address machines. */
3355 if (optimize
> 0 && (flag_regmove
|| flag_expensive_optimizations
))
3357 timevar_push (TV_REGMOVE
);
3358 open_dump_file (DFI_regmove
, decl
);
3360 regmove_optimize (insns
, max_reg_num (), rtl_dump_file
);
3362 close_dump_file (DFI_regmove
, print_rtl_with_bb
, insns
);
3363 timevar_pop (TV_REGMOVE
);
3368 /* Do unconditional splitting before register allocation to allow machine
3369 description to add extra information not needed previously. */
3370 split_all_insns (1);
3372 /* Any of the several passes since flow1 will have munged register
3373 lifetime data a bit. */
3374 register_life_up_to_date
= 0;
3376 #ifdef OPTIMIZE_MODE_SWITCHING
3377 timevar_push (TV_GCSE
);
3380 if (optimize_mode_switching (NULL
))
3382 /* We did work, and so had to regenerate global life information.
3383 Take advantage of this and don't re-recompute register life
3384 information below. */
3385 register_life_up_to_date
= 1;
3389 timevar_pop (TV_GCSE
);
3392 timevar_push (TV_SCHED
);
3394 #ifdef INSN_SCHEDULING
3396 /* Print function header into sched dump now
3397 because doing the sched analysis makes some of the dump. */
3398 if (optimize
> 0 && flag_schedule_insns
)
3400 open_dump_file (DFI_sched
, decl
);
3402 /* Do control and data sched analysis,
3403 and write some of the results to dump file. */
3405 schedule_insns (rtl_dump_file
);
3407 close_dump_file (DFI_sched
, print_rtl_with_bb
, insns
);
3409 /* Register lifetime information was updated as part of verifying
3411 register_life_up_to_date
= 1;
3414 timevar_pop (TV_SCHED
);
3418 /* Determine if the current function is a leaf before running reload
3419 since this can impact optimizations done by the prologue and
3420 epilogue thus changing register elimination offsets. */
3421 current_function_is_leaf
= leaf_function_p ();
3423 timevar_push (TV_LOCAL_ALLOC
);
3424 open_dump_file (DFI_lreg
, decl
);
3426 /* Allocate pseudo-regs that are used only within 1 basic block.
3428 RUN_JUMP_AFTER_RELOAD records whether or not we need to rerun the
3429 jump optimizer after register allocation and reloading are finished. */
3431 if (! register_life_up_to_date
)
3432 recompute_reg_usage (insns
, ! optimize_size
);
3433 regclass (insns
, max_reg_num (), rtl_dump_file
);
3434 rebuild_label_notes_after_reload
= local_alloc ();
3436 timevar_pop (TV_LOCAL_ALLOC
);
3438 if (dump_file
[DFI_lreg
].enabled
)
3440 timevar_push (TV_DUMP
);
3442 dump_flow_info (rtl_dump_file
);
3443 dump_local_alloc (rtl_dump_file
);
3445 close_dump_file (DFI_lreg
, print_rtl_with_bb
, insns
);
3446 timevar_pop (TV_DUMP
);
3451 timevar_push (TV_GLOBAL_ALLOC
);
3452 open_dump_file (DFI_greg
, decl
);
3454 /* If optimizing, allocate remaining pseudo-regs. Do the reload
3455 pass fixing up any insns that are invalid. */
3458 failure
= global_alloc (rtl_dump_file
);
3461 build_insn_chain (insns
);
3462 failure
= reload (insns
, 0);
3465 timevar_pop (TV_GLOBAL_ALLOC
);
3467 if (dump_file
[DFI_greg
].enabled
)
3469 timevar_push (TV_DUMP
);
3471 dump_global_regs (rtl_dump_file
);
3473 close_dump_file (DFI_greg
, print_rtl_with_bb
, insns
);
3474 timevar_pop (TV_DUMP
);
3478 goto exit_rest_of_compilation
;
3482 open_dump_file (DFI_postreload
, decl
);
3484 /* Do a very simple CSE pass over just the hard registers. */
3487 timevar_push (TV_RELOAD_CSE_REGS
);
3488 reload_cse_regs (insns
);
3489 timevar_pop (TV_RELOAD_CSE_REGS
);
3492 /* Register allocation and reloading may have turned an indirect jump into
3493 a direct jump. If so, we must rebuild the JUMP_LABEL fields of
3494 jumping instructions. */
3495 if (rebuild_label_notes_after_reload
)
3497 timevar_push (TV_JUMP
);
3499 rebuild_jump_labels (insns
);
3501 timevar_pop (TV_JUMP
);
3504 close_dump_file (DFI_postreload
, print_rtl_with_bb
, insns
);
3506 /* Re-create the death notes which were deleted during reload. */
3507 timevar_push (TV_FLOW2
);
3508 open_dump_file (DFI_flow2
, decl
);
3510 #ifdef ENABLE_CHECKING
3511 verify_flow_info ();
3514 /* If optimizing, then go ahead and split insns now. */
3516 split_all_insns (0);
3518 cleanup_cfg (optimize
? CLEANUP_EXPENSIVE
: 0);
3520 /* On some machines, the prologue and epilogue code, or parts thereof,
3521 can be represented as RTL. Doing so lets us schedule insns between
3522 it and the rest of the code and also allows delayed branch
3523 scheduling to operate in the epilogue. */
3524 thread_prologue_and_epilogue_insns (insns
);
3528 cleanup_cfg (CLEANUP_EXPENSIVE
| CLEANUP_CROSSJUMP
);
3529 life_analysis (insns
, rtl_dump_file
, PROP_FINAL
);
3531 /* This is kind of a heuristic. We need to run combine_stack_adjustments
3532 even for machines with possibly nonzero RETURN_POPS_ARGS
3533 and ACCUMULATE_OUTGOING_ARGS. We expect that only ports having
3534 push instructions will have popping returns. */
3535 #ifndef PUSH_ROUNDING
3536 if (!ACCUMULATE_OUTGOING_ARGS
)
3538 combine_stack_adjustments ();
3543 flow2_completed
= 1;
3545 close_dump_file (DFI_flow2
, print_rtl_with_bb
, insns
);
3546 timevar_pop (TV_FLOW2
);
3548 #ifdef HAVE_peephole2
3549 if (optimize
> 0 && flag_peephole2
)
3551 timevar_push (TV_PEEPHOLE2
);
3552 open_dump_file (DFI_peephole2
, decl
);
3554 peephole2_optimize (rtl_dump_file
);
3556 close_dump_file (DFI_peephole2
, print_rtl_with_bb
, insns
);
3557 timevar_pop (TV_PEEPHOLE2
);
3561 if (optimize
> 0 && flag_rename_registers
)
3563 timevar_push (TV_RENAME_REGISTERS
);
3564 open_dump_file (DFI_rnreg
, decl
);
3566 regrename_optimize ();
3568 close_dump_file (DFI_rnreg
, print_rtl_with_bb
, insns
);
3569 timevar_pop (TV_RENAME_REGISTERS
);
3574 timevar_push (TV_IFCVT2
);
3575 open_dump_file (DFI_ce2
, decl
);
3579 close_dump_file (DFI_ce2
, print_rtl_with_bb
, insns
);
3580 timevar_pop (TV_IFCVT2
);
3584 split_all_insns (1);
3587 #ifdef INSN_SCHEDULING
3588 if (optimize
> 0 && flag_schedule_insns_after_reload
)
3590 timevar_push (TV_SCHED2
);
3591 open_dump_file (DFI_sched2
, decl
);
3593 /* Do control and data sched analysis again,
3594 and write some more of the results to dump file. */
3596 split_all_insns (1);
3598 schedule_insns (rtl_dump_file
);
3600 close_dump_file (DFI_sched2
, print_rtl_with_bb
, insns
);
3601 timevar_pop (TV_SCHED2
);
3607 #ifdef LEAF_REGISTERS
3608 current_function_uses_only_leaf_regs
3609 = optimize
> 0 && only_leaf_regs_used () && leaf_function_p ();
3613 timevar_push (TV_REG_STACK
);
3614 open_dump_file (DFI_stack
, decl
);
3616 reg_to_stack (insns
, rtl_dump_file
);
3618 close_dump_file (DFI_stack
, print_rtl_with_bb
, insns
);
3619 timevar_pop (TV_REG_STACK
);
3625 timevar_push (TV_REORDER_BLOCKS
);
3626 open_dump_file (DFI_bbro
, decl
);
3628 /* Last attempt to optimize CFG, as life analyzis possibly removed
3629 some instructions. */
3630 cleanup_cfg (CLEANUP_EXPENSIVE
| CLEANUP_POST_REGSTACK
3631 | CLEANUP_CROSSJUMP
);
3632 if (flag_reorder_blocks
)
3634 reorder_basic_blocks ();
3635 cleanup_cfg (CLEANUP_EXPENSIVE
| CLEANUP_POST_REGSTACK
);
3638 close_dump_file (DFI_bbro
, print_rtl_with_bb
, insns
);
3639 timevar_pop (TV_REORDER_BLOCKS
);
3641 compute_alignments ();
3643 /* CFG is no longer maitained up-to-date. */
3644 free_bb_for_insn ();
3646 /* If a machine dependent reorganization is needed, call it. */
3647 #ifdef MACHINE_DEPENDENT_REORG
3648 timevar_push (TV_MACH_DEP
);
3649 open_dump_file (DFI_mach
, decl
);
3651 MACHINE_DEPENDENT_REORG (insns
);
3653 close_dump_file (DFI_mach
, print_rtl
, insns
);
3654 timevar_pop (TV_MACH_DEP
);
3659 purge_line_number_notes (insns
);
3660 cleanup_barriers ();
3662 /* If a scheduling pass for delayed branches is to be done,
3663 call the scheduling code. */
3666 if (optimize
> 0 && flag_delayed_branch
)
3668 timevar_push (TV_DBR_SCHED
);
3669 open_dump_file (DFI_dbr
, decl
);
3671 dbr_schedule (insns
, rtl_dump_file
);
3673 close_dump_file (DFI_dbr
, print_rtl
, insns
);
3674 timevar_pop (TV_DBR_SCHED
);
3680 #if defined (HAVE_ATTR_length) && !defined (STACK_REGS)
3681 timevar_push (TV_SHORTEN_BRANCH
);
3682 split_all_insns_noflow ();
3683 timevar_pop (TV_SHORTEN_BRANCH
);
3686 convert_to_eh_region_ranges ();
3688 /* Shorten branches. */
3689 timevar_push (TV_SHORTEN_BRANCH
);
3690 shorten_branches (get_insns ());
3691 timevar_pop (TV_SHORTEN_BRANCH
);
3693 current_function_nothrow
= nothrow_function_p ();
3694 if (current_function_nothrow
)
3695 /* Now we know that this can't throw; set the flag for the benefit
3696 of other functions later in this translation unit. */
3697 TREE_NOTHROW (current_function_decl
) = 1;
3699 /* Now turn the rtl into assembler code. */
3701 timevar_push (TV_FINAL
);
3706 /* Get the function's name, as described by its RTL. This may be
3707 different from the DECL_NAME name used in the source file. */
3709 x
= DECL_RTL (decl
);
3710 if (GET_CODE (x
) != MEM
)
3713 if (GET_CODE (x
) != SYMBOL_REF
)
3715 fnname
= XSTR (x
, 0);
3717 assemble_start_function (decl
, fnname
);
3718 final_start_function (insns
, asm_out_file
, optimize
);
3719 final (insns
, asm_out_file
, optimize
, 0);
3720 final_end_function ();
3722 #ifdef IA64_UNWIND_INFO
3723 /* ??? The IA-64 ".handlerdata" directive must be issued before
3724 the ".endp" directive that closes the procedure descriptor. */
3725 output_function_exception_table ();
3728 assemble_end_function (decl
, fnname
);
3730 #ifndef IA64_UNWIND_INFO
3731 /* Otherwise, it feels unclean to switch sections in the middle. */
3732 output_function_exception_table ();
3736 fflush (asm_out_file
);
3738 /* Release all memory allocated by flow. */
3739 free_basic_block_vars (0);
3741 /* Release all memory held by regsets now. */
3742 regset_release_memory ();
3744 timevar_pop (TV_FINAL
);
3748 /* Write DBX symbols if requested. */
3750 /* Note that for those inline functions where we don't initially
3751 know for certain that we will be generating an out-of-line copy,
3752 the first invocation of this routine (rest_of_compilation) will
3753 skip over this code by doing a `goto exit_rest_of_compilation;'.
3754 Later on, finish_compilation will call rest_of_compilation again
3755 for those inline functions that need to have out-of-line copies
3756 generated. During that call, we *will* be routed past here. */
3758 timevar_push (TV_SYMOUT
);
3759 (*debug_hooks
->function_decl
) (decl
);
3760 timevar_pop (TV_SYMOUT
);
3762 exit_rest_of_compilation
:
3764 /* In case the function was not output,
3765 don't leave any temporary anonymous types
3766 queued up for sdb output. */
3767 #ifdef SDB_DEBUGGING_INFO
3768 if (write_symbols
== SDB_DEBUG
)
3769 sdbout_types (NULL_TREE
);
3772 reload_completed
= 0;
3773 flow2_completed
= 0;
3776 timevar_push (TV_FINAL
);
3778 /* Clear out the insn_length contents now that they are no
3780 init_insn_lengths ();
3782 /* Clear out the real_constant_chain before some of the rtx's
3783 it runs through become garbage. */
3784 clear_const_double_mem ();
3786 /* Show no temporary slots allocated. */
3789 free_basic_block_vars (0);
3791 timevar_pop (TV_FINAL
);
3793 /* Make sure volatile mem refs aren't considered valid operands for
3794 arithmetic insns. We must call this here if this is a nested inline
3795 function, since the above code leaves us in the init_recog state
3796 (from final.c), and the function context push/pop code does not
3797 save/restore volatile_ok.
3799 ??? Maybe it isn't necessary for expand_start_function to call this
3800 anymore if we do it here? */
3802 init_recog_no_volatile ();
3804 /* We're done with this function. Free up memory if we can. */
3805 free_after_parsing (cfun
);
3806 if (! DECL_DEFER_OUTPUT (decl
))
3808 free_after_compilation (cfun
);
3810 /* Clear integrate.c's pointer to the cfun structure we just
3812 DECL_SAVED_INSNS (decl
) = 0;
3818 timevar_pop (TV_REST_OF_COMPILATION
);
3828 printf (_(" -ffixed-<register> Mark <register> as being unavailable to the compiler\n"));
3829 printf (_(" -fcall-used-<register> Mark <register> as being corrupted by function calls\n"));
3830 printf (_(" -fcall-saved-<register> Mark <register> as being preserved across functions\n"));
3831 printf (_(" -finline-limit=<number> Limits the size of inlined functions to <number>\n"));
3832 printf (_(" -fmessage-length=<number> Limits diagnostics messages lengths to <number> characters per line. 0 suppresses line-wrapping\n"));
3833 printf (_(" -fdiagnostics-show-location=[once | every-line] Indicates how often source location information should be emitted, as prefix, at the beginning of diagnostics when line-wrapping\n"));
3835 for (i
= ARRAY_SIZE (f_options
); i
--;)
3837 const char *description
= f_options
[i
].description
;
3839 if (description
!= NULL
&& * description
!= 0)
3840 printf (" -f%-21s %s\n",
3841 f_options
[i
].string
, _(description
));
3844 printf (_(" -O[number] Set optimisation level to [number]\n"));
3845 printf (_(" -Os Optimise for space rather than speed\n"));
3846 for (i
= LAST_PARAM
; i
--;)
3848 const char *description
= compiler_params
[i
].help
;
3849 const int length
= 21-strlen(compiler_params
[i
].option
);
3851 if (description
!= NULL
&& * description
!= 0)
3852 printf (" --param %s=<value>%.*s%s\n",
3853 compiler_params
[i
].option
,
3854 length
> 0 ? length
: 1, " ",
3857 printf (_(" -pedantic Issue warnings needed by strict compliance to ISO C\n"));
3858 printf (_(" -pedantic-errors Like -pedantic except that errors are produced\n"));
3859 printf (_(" -w Suppress warnings\n"));
3860 printf (_(" -W Enable extra warnings\n"));
3862 for (i
= ARRAY_SIZE (W_options
); i
--;)
3864 const char *description
= W_options
[i
].description
;
3866 if (description
!= NULL
&& * description
!= 0)
3867 printf (" -W%-21s %s\n",
3868 W_options
[i
].string
, _(description
));
3871 printf (_(" -Wunused Enable unused warnings\n"));
3872 printf (_(" -Wlarger-than-<number> Warn if an object is larger than <number> bytes\n"));
3873 printf (_(" -p Enable function profiling\n"));
3874 #if defined (BLOCK_PROFILER) || defined (FUNCTION_BLOCK_PROFILER)
3875 printf (_(" -a Enable block profiling \n"));
3877 #if defined (BLOCK_PROFILER) || defined (FUNCTION_BLOCK_PROFILER) || defined FUNCTION_BLOCK_PROFILER_EXIT
3878 printf (_(" -ax Enable jump profiling \n"));
3880 printf (_(" -o <file> Place output into <file> \n"));
3882 -G <number> Put global and static data smaller than <number>\n\
3883 bytes into a special section (on some targets)\n"));
3885 for (i
= ARRAY_SIZE (debug_args
); i
--;)
3887 if (debug_args
[i
].description
!= NULL
)
3888 printf (" -g%-21s %s\n",
3889 debug_args
[i
].arg
, _(debug_args
[i
].description
));
3892 printf (_(" -aux-info <file> Emit declaration info into <file>\n"));
3893 printf (_(" -quiet Do not display functions compiled or elapsed time\n"));
3894 printf (_(" -version Display the compiler's version\n"));
3895 printf (_(" -d[letters] Enable dumps from specific passes of the compiler\n"));
3896 printf (_(" -dumpbase <file> Base name to be used for dumps from specific passes\n"));
3897 #if defined INSN_SCHEDULING
3898 printf (_(" -fsched-verbose=<number> Set the verbosity level of the scheduler\n"));
3900 printf (_(" --help Display this information\n"));
3905 /* Display descriptions of language specific options.
3906 If there is no description, note that there is an undocumented option.
3907 If the description is empty, do not display anything. (This allows
3908 options to be deliberately undocumented, for whatever reason).
3909 If the option string is missing, then this is a marker, indicating
3910 that the description string is in fact the name of a language, whose
3911 language specific options are to follow. */
3913 if (ARRAY_SIZE (documented_lang_options
) > 1)
3915 printf (_("\nLanguage specific options:\n"));
3917 for (i
= 0; i
< ARRAY_SIZE (documented_lang_options
); i
++)
3919 const char *description
= documented_lang_options
[i
].description
;
3920 const char *option
= documented_lang_options
[i
].option
;
3922 if (description
== NULL
)
3927 printf (_(" %-23.23s [undocumented]\n"), option
);
3929 else if (*description
== 0)
3931 else if (option
== NULL
)
3935 (_("\nThere are undocumented %s specific options as well.\n"),
3939 printf (_("\n Options for %s:\n"), description
);
3944 printf (" %-23.23s %s\n", option
, _(description
));
3949 printf (_("\nThere are undocumented %s specific options as well.\n"),
3952 display_target_options ();
3956 display_target_options ()
3960 if (ARRAY_SIZE (target_switches
) > 1
3961 #ifdef TARGET_OPTIONS
3962 || ARRAY_SIZE (target_options
) > 1
3970 printf (_("\nTarget specific options:\n"));
3972 for (i
= ARRAY_SIZE (target_switches
); i
--;)
3974 const char *option
= target_switches
[i
].name
;
3975 const char *description
= target_switches
[i
].description
;
3977 if (option
== NULL
|| *option
== 0)
3979 else if (description
== NULL
)
3984 printf (_(" -m%-23.23s [undocumented]\n"), option
);
3986 else if (* description
!= 0)
3987 doc
+= printf (" -m%-23.23s %s\n", option
, _(description
));
3990 #ifdef TARGET_OPTIONS
3991 for (i
= ARRAY_SIZE (target_options
); i
--;)
3993 const char *option
= target_options
[i
].prefix
;
3994 const char *description
= target_options
[i
].description
;
3996 if (option
== NULL
|| *option
== 0)
3998 else if (description
== NULL
)
4003 printf (_(" -m%-23.23s [undocumented]\n"), option
);
4005 else if (* description
!= 0)
4006 doc
+= printf (" -m%-23.23s %s\n", option
, _(description
));
4012 printf (_("\nThere are undocumented target specific options as well.\n"));
4014 printf (_(" They exist, but they are not documented.\n"));
4019 /* Parse a -d... comand line switch. */
4022 decode_d_option (arg
)
4031 for (i
= 0; i
< (int) DFI_MAX
; ++i
)
4032 dump_file
[i
].enabled
= 1;
4038 flag_print_asm_name
= 1;
4041 flag_dump_rtl_in_asm
= 1;
4042 flag_print_asm_name
= 1;
4045 graph_dump_format
= vcg
;
4048 rtl_dump_and_exit
= 1;
4053 case 'D': /* These are handled by the preprocessor. */
4059 for (i
= 0; i
< (int) DFI_MAX
; ++i
)
4060 if (c
== dump_file
[i
].debug_switch
)
4062 dump_file
[i
].enabled
= 1;
4067 warning ("unrecognized gcc debugging option: %c", c
);
4072 /* Parse a -f... comand line switch. ARG is the value after the -f.
4073 It is safe to access 'ARG - 2' to generate the full switch name.
4074 Return the number of strings consumed. */
4077 decode_f_option (arg
)
4081 const char *option_value
= NULL
;
4083 /* Search for the option in the table of binary f options. */
4084 for (j
= ARRAY_SIZE (f_options
); j
--;)
4086 if (!strcmp (arg
, f_options
[j
].string
))
4088 *f_options
[j
].variable
= f_options
[j
].on_value
;
4092 if (arg
[0] == 'n' && arg
[1] == 'o' && arg
[2] == '-'
4093 && ! strcmp (arg
+ 3, f_options
[j
].string
))
4095 *f_options
[j
].variable
= ! f_options
[j
].on_value
;
4100 if (!strcmp (arg
, "fast-math"))
4101 set_fast_math_flags();
4102 else if (!strcmp (arg
, "no-fast-math"))
4103 set_no_fast_math_flags();
4104 else if ((option_value
= skip_leading_substring (arg
, "inline-limit-"))
4105 || (option_value
= skip_leading_substring (arg
, "inline-limit=")))
4108 read_integral_parameter (option_value
, arg
- 2,
4110 set_param_value ("max-inline-insns", val
);
4112 #ifdef INSN_SCHEDULING
4113 else if ((option_value
= skip_leading_substring (arg
, "sched-verbose=")))
4114 fix_sched_param ("verbose", option_value
);
4116 else if ((option_value
= skip_leading_substring (arg
, "fixed-")))
4117 fix_register (option_value
, 1, 1);
4118 else if ((option_value
= skip_leading_substring (arg
, "call-used-")))
4119 fix_register (option_value
, 0, 1);
4120 else if ((option_value
= skip_leading_substring (arg
, "call-saved-")))
4121 fix_register (option_value
, 0, 0);
4122 else if ((option_value
= skip_leading_substring (arg
, "align-loops=")))
4123 align_loops
= read_integral_parameter (option_value
, arg
- 2, align_loops
);
4124 else if ((option_value
= skip_leading_substring (arg
, "align-functions=")))
4126 = read_integral_parameter (option_value
, arg
- 2, align_functions
);
4127 else if ((option_value
= skip_leading_substring (arg
, "align-jumps=")))
4128 align_jumps
= read_integral_parameter (option_value
, arg
- 2, align_jumps
);
4129 else if ((option_value
= skip_leading_substring (arg
, "align-labels=")))
4131 = read_integral_parameter (option_value
, arg
- 2, align_labels
);
4132 else if ((option_value
4133 = skip_leading_substring (arg
, "stack-limit-register=")))
4135 int reg
= decode_reg_name (option_value
);
4137 error ("unrecognized register name `%s'", option_value
);
4139 stack_limit_rtx
= gen_rtx_REG (Pmode
, reg
);
4141 else if ((option_value
4142 = skip_leading_substring (arg
, "stack-limit-symbol=")))
4145 nm
= ggc_strdup (option_value
);
4146 stack_limit_rtx
= gen_rtx_SYMBOL_REF (Pmode
, nm
);
4148 else if ((option_value
4149 = skip_leading_substring (arg
, "message-length=")))
4150 output_set_maximum_length
4151 (&global_dc
->buffer
, read_integral_parameter
4152 (option_value
, arg
- 2, diagnostic_line_cutoff (global_dc
)));
4153 else if ((option_value
4154 = skip_leading_substring (arg
, "diagnostics-show-location=")))
4156 if (!strcmp (option_value
, "once"))
4157 diagnostic_prefixing_rule (global_dc
) = DIAGNOSTICS_SHOW_PREFIX_ONCE
;
4158 else if (!strcmp (option_value
, "every-line"))
4159 diagnostic_prefixing_rule (global_dc
)
4160 = DIAGNOSTICS_SHOW_PREFIX_EVERY_LINE
;
4162 error ("Unrecognized option `%s'", arg
- 2);
4164 else if (!strcmp (arg
, "no-stack-limit"))
4165 stack_limit_rtx
= NULL_RTX
;
4166 else if (!strcmp (arg
, "preprocessed"))
4167 /* Recognise this switch but do nothing. This prevents warnings
4168 about an unrecognized switch if cpplib has not been linked in. */
4176 /* Parse a -W... comand line switch. ARG is the value after the -W.
4177 It is safe to access 'ARG - 2' to generate the full switch name.
4178 Return the number of strings consumed. */
4181 decode_W_option (arg
)
4184 const char *option_value
= NULL
;
4187 /* Search for the option in the table of binary W options. */
4189 for (j
= ARRAY_SIZE (W_options
); j
--;)
4191 if (!strcmp (arg
, W_options
[j
].string
))
4193 *W_options
[j
].variable
= W_options
[j
].on_value
;
4197 if (arg
[0] == 'n' && arg
[1] == 'o' && arg
[2] == '-'
4198 && ! strcmp (arg
+ 3, W_options
[j
].string
))
4200 *W_options
[j
].variable
= ! W_options
[j
].on_value
;
4205 if ((option_value
= skip_leading_substring (arg
, "id-clash-")))
4206 warning ("-Wid-clash-LEN is no longer supported");
4207 else if ((option_value
= skip_leading_substring (arg
, "larger-than-")))
4209 larger_than_size
= read_integral_parameter (option_value
, arg
- 2, -1);
4211 warn_larger_than
= larger_than_size
!= -1;
4213 else if (!strcmp (arg
, "unused"))
4217 else if (!strcmp (arg
, "no-unused"))
4227 /* Parse a -g... comand line switch. ARG is the value after the -g.
4228 It is safe to access 'ARG - 2' to generate the full switch name.
4229 Return the number of strings consumed. */
4232 decode_g_option (arg
)
4235 static unsigned level
=0;
4236 /* A lot of code assumes write_symbols == NO_DEBUG if the
4237 debugging level is 0 (thus -gstabs1 -gstabs0 would lose track
4238 of what debugging type has been selected). This records the
4239 selected type. It is an error to specify more than one
4241 static enum debug_info_type selected_debug_type
= NO_DEBUG
;
4242 /* Non-zero if debugging format has been explicitly set.
4243 -g and -ggdb don't explicitly set the debugging format so
4244 -gdwarf -g3 is equivalent to -gdwarf3. */
4245 static int type_explicitly_set_p
= 0;
4246 /* Indexed by enum debug_info_type. */
4247 static const char *const debug_type_names
[] =
4249 "none", "stabs", "coff", "dwarf-1", "dwarf-2", "xcoff"
4252 /* The maximum admissible debug level value. */
4253 static const unsigned max_debug_level
= 3;
4255 /* Look up ARG in the table. */
4256 for (da
= debug_args
; da
->arg
; da
++)
4258 const int da_len
= strlen (da
->arg
);
4260 if (da_len
== 0 || ! strncmp (arg
, da
->arg
, da_len
))
4262 enum debug_info_type type
= da
->debug_type
;
4263 const char *p
= arg
+ da_len
;
4265 if (*p
&& (*p
< '0' || *p
> '9'))
4268 /* A debug flag without a level defaults to level 2.
4269 Note we do not want to call read_integral_parameter
4270 for that case since it will call atoi which
4273 ??? We may want to generalize the interface to
4274 read_integral_parameter to better handle this case
4275 if this case shows up often. */
4277 level
= read_integral_parameter (p
, 0, max_debug_level
+ 1);
4279 level
= (level
== 0) ? 2 : level
;
4281 if (da_len
> 1 && *p
&& !strncmp (arg
, "dwarf", da_len
))
4283 error ("use -gdwarf -g%d for DWARF v1, level %d",
4286 error ("use -gdwarf-2 for DWARF v2");
4289 if (level
> max_debug_level
)
4292 ignoring option `%s' due to invalid debug level specification",
4294 level
= debug_info_level
;
4297 if (type
== NO_DEBUG
)
4299 type
= PREFERRED_DEBUGGING_TYPE
;
4301 if (da_len
> 1 && strncmp (arg
, "gdb", da_len
) == 0)
4303 #if defined (DWARF2_DEBUGGING_INFO) && !defined (LINKER_DOES_NOT_WORK_WITH_DWARF2)
4304 type
= DWARF2_DEBUG
;
4306 #ifdef DBX_DEBUGGING_INFO
4313 if (type
== NO_DEBUG
)
4314 warning ("`%s': unknown or unsupported -g option", arg
- 2);
4316 /* Does it conflict with an already selected type? */
4317 if (type_explicitly_set_p
4318 /* -g/-ggdb don't conflict with anything. */
4319 && da
->debug_type
!= NO_DEBUG
4320 && type
!= selected_debug_type
)
4321 warning ("`%s' ignored, conflicts with `-g%s'",
4322 arg
- 2, debug_type_names
[(int) selected_debug_type
]);
4325 /* If the format has already been set, -g/-ggdb
4326 only change the debug level. */
4327 if (type_explicitly_set_p
&& da
->debug_type
== NO_DEBUG
)
4328 /* Don't change debugging type. */
4332 selected_debug_type
= type
;
4333 type_explicitly_set_p
= da
->debug_type
!= NO_DEBUG
;
4336 write_symbols
= (level
== 0
4338 : selected_debug_type
);
4339 use_gnu_debug_info_extensions
= da
->use_extensions_p
;
4340 debug_info_level
= (enum debug_info_level
) level
;
4353 /* Decode the first argument in the argv as a language-independent option.
4354 Return the number of strings consumed. */
4357 independent_decode_option (argc
, argv
)
4361 char *arg
= argv
[0];
4363 if (arg
[0] != '-' || arg
[1] == 0)
4375 if (!strcmp (arg
, "-help"))
4378 exit_after_options
= 1;
4381 if (!strcmp (arg
, "-target-help"))
4383 display_target_options ();
4384 exit_after_options
= 1;
4387 if (!strcmp (arg
, "-version"))
4389 print_version (stderr
, "");
4390 exit_after_options
= 1;
4393 /* Handle '--param <name>=<value>'. */
4394 if (strcmp (arg
, "-param") == 0)
4400 error ("-param option missing argument");
4404 /* Get the '<name>=<value>' parameter. */
4406 /* Look for the `='. */
4407 equal
= strchr (arg
, '=');
4409 error ("invalid --param option: %s", arg
);
4414 /* Zero out the `=' sign so that we get two separate strings. */
4416 /* Figure out what value is specified. */
4417 val
= read_integral_parameter (equal
+ 1, NULL
, INVALID_PARAM_VAL
);
4418 if (val
!= INVALID_PARAM_VAL
)
4419 set_param_value (arg
, val
);
4421 error ("invalid parameter value `%s'", equal
+ 1);
4436 /* Already been treated in main (). Do nothing. */
4440 set_target_switch (arg
+ 1);
4444 return decode_f_option (arg
+ 1);
4447 return decode_g_option (arg
+ 1);
4450 if (!strcmp (arg
, "dumpbase"))
4455 dump_base_name
= argv
[1];
4459 decode_d_option (arg
+ 1);
4463 if (!strcmp (arg
, "pedantic"))
4465 else if (!strcmp (arg
, "pedantic-errors"))
4466 flag_pedantic_errors
= pedantic
= 1;
4467 else if (arg
[1] == 0)
4474 if (!strcmp (arg
, "quiet"))
4481 if (!strcmp (arg
, "version"))
4489 inhibit_warnings
= 1;
4498 /* We save the value of warn_uninitialized, since if they put
4499 -Wuninitialized on the command line, we need to generate a
4500 warning about not using it without also specifying -O. */
4501 if (warn_uninitialized
!= 1)
4502 warn_uninitialized
= 2;
4505 return decode_W_option (arg
+ 1);
4511 #if !defined (BLOCK_PROFILER) || !defined (FUNCTION_BLOCK_PROFILER)
4512 warning ("`-a' option (basic block profile) not supported");
4514 profile_block_flag
= (profile_block_flag
< 2) ? 1 : 3;
4517 else if (!strcmp (arg
, "ax"))
4519 #if !defined (FUNCTION_BLOCK_PROFILER_EXIT) || !defined (BLOCK_PROFILER) || !defined (FUNCTION_BLOCK_PROFILER)
4520 warning ("`-ax' option (jump profiling) not supported");
4522 profile_block_flag
= (!profile_block_flag
4523 || profile_block_flag
== 2) ? 2 : 3;
4526 else if (!strncmp (arg
, "aux-info", 8))
4533 aux_info_file_name
= argv
[1];
4534 flag_gen_aux_info
= 1;
4537 else if (arg
[8] == '=')
4539 aux_info_file_name
= arg
+ 9;
4540 flag_gen_aux_info
= 1;
4555 asm_file_name
= argv
[1];
4570 g_switch_val
= read_integral_parameter (argv
[1], 0, -1);
4575 g_switch_val
= read_integral_parameter (arg
+ 1, 0, -1);
4579 if (g_switch_val
== -1)
4583 g_switch_set
= TRUE
;
4584 g_switch_value
= g_switch_val
;
4594 /* Entry point of cc1, cc1plus, jc1, f771, etc.
4595 Decode command args, then call compile_file.
4596 Exit code is FATAL_EXIT_CODE if can't open files or if there were
4597 any errors, or SUCCESS_EXIT_CODE if compilation succeeded.
4599 It is not safe to call this function more than once. */
4602 toplev_main (argc
, argv
)
4609 /* save in case md file wants to emit args as a comment. */
4613 p
= argv
[0] + strlen (argv
[0]);
4614 while (p
!= argv
[0] && !IS_DIR_SEPARATOR (p
[-1]))
4618 xmalloc_set_program_name (progname
);
4620 /* LC_CTYPE determines the character set used by the terminal so it has be set
4621 to output messages correctly. */
4623 #ifdef HAVE_LC_MESSAGES
4624 setlocale (LC_CTYPE
, "");
4625 setlocale (LC_MESSAGES
, "");
4627 setlocale (LC_ALL
, "");
4630 (void) bindtextdomain (PACKAGE
, localedir
);
4631 (void) textdomain (PACKAGE
);
4633 /* Install handler for SIGFPE, which may be received while we do
4634 compile-time floating point arithmetic. */
4635 signal (SIGFPE
, float_signal
);
4637 /* Trap fatal signals, e.g. SIGSEGV, and convert them to ICE messages. */
4639 signal (SIGSEGV
, crash_signal
);
4642 signal (SIGILL
, crash_signal
);
4645 signal (SIGBUS
, crash_signal
);
4648 signal (SIGABRT
, crash_signal
);
4650 #if defined SIGIOT && (!defined SIGABRT || SIGABRT != SIGIOT)
4651 signal (SIGIOT
, crash_signal
);
4654 decl_printable_name
= decl_name
;
4655 lang_expand_expr
= (lang_expand_expr_t
) do_abort
;
4657 /* Initialize whether `char' is signed. */
4658 flag_signed_char
= DEFAULT_SIGNED_CHAR
;
4659 #ifdef DEFAULT_SHORT_ENUMS
4660 /* Initialize how much space enums occupy, by default. */
4661 flag_short_enums
= DEFAULT_SHORT_ENUMS
;
4664 /* Initialize the garbage-collector. */
4667 ggc_add_rtx_root (&stack_limit_rtx
, 1);
4668 ggc_add_tree_root (¤t_function_decl
, 1);
4669 ggc_add_tree_root (¤t_function_func_begin_label
, 1);
4671 /* Initialize the diagnostics reporting machinery. */
4672 diagnostic_initialize (global_dc
);
4674 /* Register the language-independent parameters. */
4675 add_params (lang_independent_params
, LAST_PARAM
);
4677 /* Perform language-specific options intialization. */
4678 if (lang_hooks
.init_options
)
4679 (*lang_hooks
.init_options
) ();
4681 /* Scan to see what optimization level has been specified. That will
4682 determine the default value of many flags. */
4683 for (i
= 1; i
< argc
; i
++)
4685 if (!strcmp (argv
[i
], "-O"))
4690 else if (argv
[i
][0] == '-' && argv
[i
][1] == 'O')
4692 /* Handle -Os, -O2, -O3, -O69, ... */
4693 char *p
= &argv
[i
][2];
4695 if ((p
[0] == 's') && (p
[1] == 0))
4699 /* Optimizing for size forces optimize to be 2. */
4704 const int optimize_val
= read_integral_parameter (p
, p
- 2, -1);
4705 if (optimize_val
!= -1)
4707 optimize
= optimize_val
;
4716 flag_merge_constants
= 0;
4722 flag_thread_jumps
= 1;
4724 flag_delayed_branch
= 1;
4726 #ifdef CAN_DEBUG_WITHOUT_FP
4727 flag_omit_frame_pointer
= 1;
4729 flag_guess_branch_prob
= 1;
4734 flag_optimize_sibling_calls
= 1;
4735 flag_cse_follow_jumps
= 1;
4736 flag_cse_skip_blocks
= 1;
4738 flag_expensive_optimizations
= 1;
4739 flag_strength_reduce
= 1;
4740 flag_rerun_cse_after_loop
= 1;
4741 flag_rerun_loop_opt
= 1;
4742 flag_caller_saves
= 1;
4745 #ifdef INSN_SCHEDULING
4746 flag_schedule_insns
= 1;
4747 flag_schedule_insns_after_reload
= 1;
4750 flag_strict_aliasing
= 1;
4751 flag_delete_null_pointer_checks
= 1;
4752 flag_reorder_blocks
= 1;
4757 flag_inline_functions
= 1;
4758 flag_rename_registers
= 1;
4761 if (optimize
< 2 || optimize_size
)
4766 align_functions
= 1;
4769 /* Initialize target_flags before OPTIMIZATION_OPTIONS so the latter can
4772 set_target_switch ("");
4774 /* Unwind tables are always present in an ABI-conformant IA-64
4775 object file, so the default should be ON. */
4776 #ifdef IA64_UNWIND_INFO
4777 flag_unwind_tables
= IA64_UNWIND_INFO
;
4780 #ifdef OPTIMIZATION_OPTIONS
4781 /* Allow default optimizations to be specified on a per-machine basis. */
4782 OPTIMIZATION_OPTIONS (optimize
, optimize_size
);
4785 /* Initialize register usage now so switches may override. */
4788 /* Perform normal command line switch decoding. */
4789 for (i
= 1; i
< argc
;)
4792 int indep_processed
;
4794 /* Give the language a chance to decode the option for itself. */
4795 lang_processed
= (*lang_hooks
.decode_option
) (argc
- i
, argv
+ i
);
4797 if (lang_processed
>= 0)
4798 /* Now see if the option also has a language independent meaning.
4799 Some options are both language specific and language independent,
4801 indep_processed
= independent_decode_option (argc
- i
, argv
+ i
);
4804 lang_processed
= -lang_processed
;
4805 indep_processed
= 0;
4808 if (lang_processed
|| indep_processed
)
4809 i
+= MAX (lang_processed
, indep_processed
);
4812 const char *option
= NULL
;
4813 const char *lang
= NULL
;
4816 /* It is possible that the command line switch is not valid for the
4817 current language, but it is valid for another language. In order
4818 to be compatible with previous versions of the compiler (which
4819 did not issue an error message in this case) we check for this
4820 possibility here. If we do find a match, then if extra_warnings
4821 is set we generate a warning message, otherwise we will just
4822 ignore the option. */
4823 for (j
= 0; j
< ARRAY_SIZE (documented_lang_options
); j
++)
4825 option
= documented_lang_options
[j
].option
;
4828 lang
= documented_lang_options
[j
].description
;
4829 else if (! strncmp (argv
[i
], option
, strlen (option
)))
4833 if (j
!= ARRAY_SIZE (documented_lang_options
))
4837 warning ("Ignoring command line option '%s'", argv
[i
]);
4840 ("(It is valid for %s but not the selected language)",
4844 else if (argv
[i
][0] == '-' && argv
[i
][1] == 'g')
4845 warning ("`%s': unknown or unsupported -g option", &argv
[i
][2]);
4847 error ("Unrecognized option `%s'", argv
[i
]);
4853 /* All command line options have been processed. */
4854 if (lang_hooks
.post_options
)
4855 (*lang_hooks
.post_options
) ();
4857 if (exit_after_options
)
4860 /* Checker uses the frame pointer. */
4861 if (flag_check_memory_usage
)
4862 flag_omit_frame_pointer
= 0;
4866 /* Inlining does not work if not optimizing,
4867 so force it not to be done. */
4871 /* The c_decode_option function and decode_option hook set
4872 this to `2' if -Wall is used, so we can avoid giving out
4873 lots of errors for people who don't realize what -Wall does. */
4874 if (warn_uninitialized
== 1)
4875 warning ("-Wuninitialized is not supported without -O");
4878 /* We do not currently support sibling-call optimization in the
4879 presence of exceptions. See PR2975 for a test-case that will
4880 fail if we try to combine both of these features. */
4881 if (flag_exceptions
)
4882 flag_optimize_sibling_calls
= 0;
4884 #ifdef OVERRIDE_OPTIONS
4885 /* Some machines may reject certain combinations of options. */
4889 /* Set up the align_*_log variables, defaulting them to 1 if they
4890 were still unset. */
4891 if (align_loops
<= 0) align_loops
= 1;
4892 align_loops_log
= floor_log2 (align_loops
* 2 - 1);
4893 if (align_jumps
<= 0) align_jumps
= 1;
4894 align_jumps_log
= floor_log2 (align_jumps
* 2 - 1);
4895 if (align_labels
<= 0) align_labels
= 1;
4896 align_labels_log
= floor_log2 (align_labels
* 2 - 1);
4897 if (align_functions
<= 0) align_functions
= 1;
4898 align_functions_log
= floor_log2 (align_functions
* 2 - 1);
4900 if (profile_block_flag
== 3)
4902 warning ("`-ax' and `-a' are conflicting options. `-a' ignored.");
4903 profile_block_flag
= 2;
4906 /* Unrolling all loops implies that standard loop unrolling must also
4908 if (flag_unroll_all_loops
)
4909 flag_unroll_loops
= 1;
4910 /* Loop unrolling requires that strength_reduction be on also. Silently
4911 turn on strength reduction here if it isn't already on. Also, the loop
4912 unrolling code assumes that cse will be run after loop, so that must
4913 be turned on also. */
4914 if (flag_unroll_loops
)
4916 flag_strength_reduce
= 1;
4917 flag_rerun_cse_after_loop
= 1;
4920 /* Warn about options that are not supported on this machine. */
4921 #ifndef INSN_SCHEDULING
4922 if (flag_schedule_insns
|| flag_schedule_insns_after_reload
)
4923 warning ("instruction scheduling not supported on this target machine");
4926 if (flag_delayed_branch
)
4927 warning ("this target machine does not have delayed branches");
4930 /* Some operating systems do not allow profiling without a frame
4932 if (!TARGET_ALLOWS_PROFILING_WITHOUT_FRAME_POINTER
4934 && flag_omit_frame_pointer
)
4936 error ("profiling does not work without a frame pointer");
4937 flag_omit_frame_pointer
= 0;
4940 user_label_prefix
= USER_LABEL_PREFIX
;
4941 if (flag_leading_underscore
!= -1)
4943 /* If the default prefix is more complicated than "" or "_",
4944 issue a warning and ignore this option. */
4945 if (user_label_prefix
[0] == 0 ||
4946 (user_label_prefix
[0] == '_' && user_label_prefix
[1] == 0))
4948 user_label_prefix
= flag_leading_underscore
? "_" : "";
4951 warning ("-f%sleading-underscore not supported on this target machine",
4952 flag_leading_underscore
? "" : "no-");
4955 /* If we are in verbose mode, write out the version and maybe all the
4956 option flags in use. */
4959 print_version (stderr
, "");
4961 print_switch_values (stderr
, 0, MAX_LINE
, "", " ", "\n");
4964 compile_file (filename
);
4967 return (FATAL_EXIT_CODE
);
4969 return (FATAL_EXIT_CODE
);
4970 return (SUCCESS_EXIT_CODE
);
4973 /* Decode -m switches. */
4974 /* Decode the switch -mNAME. */
4977 set_target_switch (name
)
4981 int valid_target_option
= 0;
4983 for (j
= 0; j
< ARRAY_SIZE (target_switches
); j
++)
4984 if (!strcmp (target_switches
[j
].name
, name
))
4986 if (target_switches
[j
].value
< 0)
4987 target_flags
&= ~-target_switches
[j
].value
;
4989 target_flags
|= target_switches
[j
].value
;
4990 valid_target_option
= 1;
4993 #ifdef TARGET_OPTIONS
4994 if (!valid_target_option
)
4995 for (j
= 0; j
< ARRAY_SIZE (target_options
); j
++)
4997 int len
= strlen (target_options
[j
].prefix
);
4998 if (!strncmp (target_options
[j
].prefix
, name
, len
))
5000 *target_options
[j
].variable
= name
+ len
;
5001 valid_target_option
= 1;
5006 if (!valid_target_option
)
5007 error ("Invalid option `%s'", name
);
5010 /* Print version information to FILE.
5011 Each line begins with INDENT (for the case where FILE is the
5012 assembler output file). */
5015 print_version (file
, indent
)
5020 #define __VERSION__ "[?]"
5024 "%s%s%s version %s (%s)\n%s\tcompiled by GNU C version %s.\n"
5026 "%s%s%s version %s (%s) compiled by CC.\n"
5028 , indent
, *indent
!= 0 ? " " : "",
5029 language_string
, version_string
, TARGET_NAME
,
5030 indent
, __VERSION__
);
5033 /* Print an option value and return the adjusted position in the line.
5034 ??? We don't handle error returns from fprintf (disk full); presumably
5035 other code will catch a disk full though. */
5038 print_single_switch (file
, pos
, max
, indent
, sep
, term
, type
, name
)
5041 const char *indent
, *sep
, *term
, *type
, *name
;
5043 /* The ultrix fprintf returns 0 on success, so compute the result we want
5044 here since we need it for the following test. */
5045 int len
= strlen (sep
) + strlen (type
) + strlen (name
);
5050 fprintf (file
, "%s", term
);
5055 fprintf (file
, "%s", indent
);
5056 pos
= strlen (indent
);
5058 fprintf (file
, "%s%s%s", sep
, type
, name
);
5063 /* Print active target switches to FILE.
5064 POS is the current cursor position and MAX is the size of a "line".
5065 Each line begins with INDENT and ends with TERM.
5066 Each switch is separated from the next by SEP. */
5069 print_switch_values (file
, pos
, max
, indent
, sep
, term
)
5072 const char *indent
, *sep
, *term
;
5077 /* Print the options as passed. */
5079 pos
= print_single_switch (file
, pos
, max
, indent
, *indent
? " " : "", term
,
5080 _("options passed: "), "");
5082 for (p
= &save_argv
[1]; *p
!= NULL
; p
++)
5086 if (strcmp (*p
, "-o") == 0)
5092 if (strcmp (*p
, "-quiet") == 0)
5094 if (strcmp (*p
, "-version") == 0)
5099 pos
= print_single_switch (file
, pos
, max
, indent
, sep
, term
, *p
, "");
5102 fprintf (file
, "%s", term
);
5104 /* Print the -f and -m options that have been enabled.
5105 We don't handle language specific options but printing argv
5108 pos
= print_single_switch (file
, 0, max
, indent
, *indent
? " " : "", term
,
5109 _("options enabled: "), "");
5111 for (j
= 0; j
< ARRAY_SIZE (f_options
); j
++)
5112 if (*f_options
[j
].variable
== f_options
[j
].on_value
)
5113 pos
= print_single_switch (file
, pos
, max
, indent
, sep
, term
,
5114 "-f", f_options
[j
].string
);
5116 /* Print target specific options. */
5118 for (j
= 0; j
< ARRAY_SIZE (target_switches
); j
++)
5119 if (target_switches
[j
].name
[0] != '\0'
5120 && target_switches
[j
].value
> 0
5121 && ((target_switches
[j
].value
& target_flags
)
5122 == target_switches
[j
].value
))
5124 pos
= print_single_switch (file
, pos
, max
, indent
, sep
, term
,
5125 "-m", target_switches
[j
].name
);
5128 #ifdef TARGET_OPTIONS
5129 for (j
= 0; j
< ARRAY_SIZE (target_options
); j
++)
5130 if (*target_options
[j
].variable
!= NULL
)
5133 sprintf (prefix
, "-m%s", target_options
[j
].prefix
);
5134 pos
= print_single_switch (file
, pos
, max
, indent
, sep
, term
,
5135 prefix
, *target_options
[j
].variable
);
5139 fprintf (file
, "%s", term
);